1. A sterilization control method of an air conditioner is characterized by comprising the following steps:

after receiving a sterilization instruction, judging whether the current environment meets a preset condition, wherein the preset condition comprises: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold;

if yes, controlling the air conditioner to enter a sterilization mode, wherein the sterilization mode comprises the following steps:

the method comprises the steps of controlling an outdoor direct current motor of the air conditioner to operate at a preset initial rotating speed, controlling an indoor motor to operate at a first preset rotating speed and controlling a compressor to operate at a preset initial frequency, meanwhile controlling an air deflector to be at a set position, obtaining a temperature value of an indoor heat exchanger after operating for a first preset time, adjusting one or more of the rotating speed of the outdoor direct current motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger, and in the adjusting process, adjusting the frequency of the compressor according to a priority greater than adjusting the rotating speed of the outdoor direct current motor.

2. The sterilization control method of an air conditioner according to claim 1, wherein the adjusting one or more of the rotation speed of the outdoor dc motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger includes:

and if the temperature value of the indoor heat exchanger is smaller than a first preset sterilization temperature value, controlling the compressor to gradually increase the frequency according to a preset frequency adjustment amount on the basis of the initial frequency so as to correspondingly increase the temperature value of the indoor heat exchanger until the temperature value of the indoor heat exchanger is larger than or equal to the first preset sterilization temperature value and smaller than a second preset sterilization temperature value.

3. The sterilization control method of an air conditioner according to claim 1, wherein the adjusting one or more of the rotation speed of the outdoor dc motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger includes:

and if the temperature value of the indoor heat exchanger is greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, controlling the compressor to continuously run at the initial frequency so as to maintain the temperature value of the indoor heat exchanger.

4. The sterilization control method of an air conditioner according to claim 1, wherein the adjusting one or more of the rotation speed of the outdoor dc motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger includes:

if the temperature value of the indoor heat exchanger is larger than a second preset sterilization temperature value, controlling the compressor to gradually reduce the frequency according to a preset frequency regulating quantity on the basis of the initial frequency so as to correspondingly reduce the temperature value of the indoor heat exchanger;

in the process of reducing the frequency of the compressor, if the temperature value of the indoor heat exchanger is reduced to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, and the frequency of the compressor is greater than or equal to a lowest frequency threshold value of the compressor at the moment, controlling the compressor to operate according to the frequency of the compressor at the moment; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the frequency of the compressor is reduced to the lowest frequency threshold value of the compressor at the moment, controlling the outdoor direct current motor to gradually reduce the rotating speed according to a preset step length on the basis of the initial rotating speed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

5. The sterilization control method of an air conditioner according to claim 4, wherein said controlling said outdoor DC motor to successively lower the rotation speed by a first preset step based on said preset rotation speed further comprises:

in the process of reducing the rotating speed of the outdoor direct current motor, if the temperature value of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value, and the rotating speed of the outdoor direct current motor is greater than or equal to the lowest rotating speed threshold value of the outdoor direct current motor at the moment, controlling the outdoor direct current motor to operate according to the rotating speed of the outdoor direct current motor at the moment; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the rotating speed of the outdoor direct current motor is reduced to the lowest rotating speed threshold value of the outdoor direct current motor at the moment, controlling the outdoor direct current motor to be turned off, and controlling the outdoor direct current motor to be turned on again until the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value, and operating according to the lowest rotating speed threshold value of the outdoor direct current motor to correspondingly increase the temperature of the indoor heat exchanger.

6. The sterilization control method of an air conditioner according to claim 5, wherein after the re-controlling the outdoor DC motor to be turned on and operating according to the lowest rotation speed threshold of the outdoor DC motor, further comprising:

if the temperature value of the indoor heat exchanger is increased to be greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value, controlling the outdoor direct current motor to be continuously started and operate according to the minimum rotating speed threshold value of the outdoor direct current motor, and controlling the outdoor direct current motor to be stopped when the temperature value of the indoor heat exchanger is increased to be greater than the second preset sterilization temperature value so as to correspondingly reduce the temperature value of the indoor heat exchanger, and controlling the outdoor direct current motor to be started and operate according to the minimum rotating speed threshold value of the outdoor direct current motor when the temperature value of the indoor heat exchanger is reduced to be less than the first preset sterilization temperature value; the above process is repeatedly executed to alternately control the outdoor direct current motor to be turned on or turned off.

7. The sterilization control method of an air conditioner according to any one of claims 1 to 6, further comprising, in the sterilization mode:

and if the time accumulated by the temperature value of the indoor heat exchanger being greater than the first preset sterilization temperature value reaches a second preset time, controlling the air conditioner to exit the sterilization mode.

8. A sterilization control apparatus for an air conditioner, comprising:

the judgment module is used for judging whether the current environment meets a preset condition after receiving the sterilization instruction, wherein the preset condition comprises: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold;

the control module is used for controlling an outdoor direct current motor of the air conditioner to operate at a preset initial rotating speed, an indoor motor to operate at a first preset rotating speed and a compressor to operate at a preset initial frequency when the current environment meets preset conditions, meanwhile, the air deflector is controlled to be in a set position, a temperature value of an indoor heat exchanger is obtained after the air deflector operates for a first preset time, one or more of the rotating speed of the outdoor direct current motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, and in the adjusting process, the priority for adjusting the frequency of the compressor is greater than the priority for adjusting the rotating speed of the outdoor direct current motor.

9. An air conditioner, comprising:

the sterilization control device of an air conditioner as claimed in claim 8; or

A processor, a memory, and a sterilization control program of an air conditioner stored on the memory and executable on the processor, the sterilization control program of the air conditioner implementing the sterilization control method of the air conditioner as claimed in any one of claims 1 to 7 when executed by the processor.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a sterilization control program of an air conditioner, which when executed by a processor, implements the sterilization control method of the air conditioner according to any one of claims 1 to 7.

Background

Along with the health requirements of users on the air conditioner in the use process, the high-temperature sterilization function of the air conditioner becomes the focus of attention of related technical personnel, the high-temperature sterilization function of the air conditioner is to inactivate germs and viruses by utilizing the high temperature of an indoor heat exchanger, therefore, the high-temperature sterilization function is to control the temperature of a coil pipe of the indoor heat exchanger to be maintained above 56 ℃, the essence of the high-temperature sterilization is heating, the harsh heating working condition specified by the national standard is the maximum operation heating working condition, which is called as the thermotechnical working condition for short, namely, 27 ℃ of indoor dry and wet balls and 24 ℃ of outdoor dry and wet balls and 18 ℃. However, in practical applications, users can also use the high-temperature sterilization function of the air conditioner to perform sterilization at higher ambient temperature, such as summer, but in summer, the outdoor temperature generally exceeds 30 ℃, even can reach 40 ℃ or above, and is more severe than the high thermal condition specified by the national standard, at this time, in order to ensure the sterilization effect, the temperature of the heat exchanger coil must be controlled and maintained in a higher sterilization temperature range, so the condensation pressure of the corresponding refrigeration system is high, however, the higher the temperature in summer, the better the heat exchange coefficient is, so that the compressor must operate at a low frequency, such as 10Hz, that is, a heavy load, and a low frequency. When the air conditioner runs under heavy load and low frequency, the problem that the air conditioner drives the compressor to fail easily occurs, and the reliability of the compressor is low. Wherein, the principle that the heavy load low frequency drives the compressor to lose step and shut down does: the output torque of a compressor motor, such as a permanent magnet synchronous motor, is related to the motor speed or frequency, and when the frequency is reduced to a certain value, the output torque is rapidly reduced. When the compressor is at a low frequency, the fluctuation of the rotating speed is obvious due to the influence of the rotational inertia, for example, when the compressor is at 20Hz, the fluctuation range may be 15Hz-30Hz, when the compressor is at 20Hz, the output torque is limited, the torque current may be increased for dragging the load, and when the torque current reaches the upper limit, the drive may be stopped out of step. And, as shown in fig. 1, when the frequency of the compressor is lower than 30Hz, the lower the frequency, the lower the maximum condensing pressure boundary, in order to maintain the coil of the indoor heat exchanger at 56 ℃, the corresponding condensing pressure is at least 3.6 Mpa; the highest sterilization condensation temperature can not exceed the maximum condensation pressure 4.15MPa specified by the compressor, the corresponding condensation temperature is 64 ℃, and different refrigerants have different specified maximum condensation pressure boundaries and corresponding condensation temperatures.

Aiming at the sterilization function of the air conditioner, in the prior related technology, the air conditioner is controlled to enter a high-temperature sterilization mode and perform heating operation, whether the pressure ratio of high pressure and low pressure is greater than or equal to a preset ratio or whether the pressure difference is greater than or equal to a preset difference value is detected and judged, and if the pressure ratio is greater than or equal to the preset ratio or the pressure difference is greater than or equal to the preset difference value, at least one of increasing the rotating speed of an outdoor fan, reducing the frequency of a compressor, increasing the opening degree of a throttling device and increasing the rotating speed of an indoor fan is performed; if the pressure ratio is smaller than the preset ratio or the pressure difference is smaller than the preset difference value, whether the temperature of the indoor heat exchanger is lower than the first sterilization temperature or not is judged, and if yes, at least one of the air guide piece is adjusted to reduce the area of the air outlet, the rotating speed of the indoor fan is reduced, the frequency of the compressor is improved, the opening of the throttling device is reduced, the rotating speed of the outdoor fan is improved, and the electric auxiliary heat is started to improve the temperature of the indoor heat exchanger. This improves the sterilization effect.

However, the conventional sterilization control method only considers the improvement of the sterilization effect, but does not consider the reliability problem of the compressor during sterilization, and is easy to trigger the driving step-out fault shutdown when the indoor and outdoor ambient temperatures are high, and is easy to cause the problem of the over-standard pressure of the refrigeration system, thereby reducing the reliability of the operation of the compressor.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

Therefore, an object of the present invention is to provide a sterilization control method for an air conditioner, which obtains a temperature value of an indoor heat exchanger when controlling the air conditioner to perform high-temperature sterilization, and adjusts one or more of the frequency of a compressor and the rotation speed of an outdoor dc motor according to the temperature value of the indoor heat exchanger and a priority order, controls the frequency of the compressor at or above the lowest frequency during high-temperature sterilization, and correspondingly controls the rotation speed of the outdoor dc motor, so as to ensure that the compressor can normally operate in an indoor and outdoor high-temperature environment during high-temperature sterilization, and avoid the problems of desynchronized shutdown caused by low-frequency operation of the compressor and overhigh condensation pressure, thereby improving the reliability of the operation of the compressor during high-temperature sterilization and the reliability of high-temperature sterilization of the air conditioner without increasing cost.

Therefore, a second object of the present invention is to provide a sterilization control device for an air conditioner.

To this end, a third object of the present invention is to provide an air conditioner.

To this end, a fourth object of the invention is to propose a computer-readable storage medium.

In order to achieve the above object, an embodiment of a first aspect of the present invention proposes a sterilization control method of an air conditioner, the method including: after receiving a sterilization instruction, judging whether the current environment meets a preset condition, wherein the preset condition comprises: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold; if yes, controlling the air conditioner to enter a sterilization mode, wherein the sterilization mode comprises the following steps: the method comprises the steps of controlling an outdoor direct current motor of the air conditioner to operate at a preset initial rotating speed, controlling an indoor motor to operate at a first preset rotating speed and controlling a compressor to operate at a preset initial frequency, meanwhile controlling an air deflector to be at a set position, obtaining a temperature value of an indoor heat exchanger after operating for a first preset time, adjusting one or more of the rotating speed of the outdoor direct current motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger, and in the adjusting process, adjusting the frequency of the compressor according to a priority greater than adjusting the rotating speed of the outdoor direct current motor.

According to the sterilization control method of the air conditioner, when the current environment meets the preset conditions, the air conditioner is controlled to enter a sterilization mode, and high-temperature sterilization is carried out in the sterilization mode, namely, an outdoor direct current motor of the air conditioner is controlled to operate at a preset initial rotating speed, an indoor motor operates at a first preset rotating speed, and a compressor operates at a preset initial frequency, after the air conditioner operates for a first preset time, a temperature value of an indoor heat exchanger is obtained, one or more of the frequency of the compressor and the rotating speed of the outdoor direct current motor are adjusted according to a priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, the rotating speed of the outdoor direct current motor is correspondingly controlled, and the compressor can normally operate in indoor and outdoor high-temperature environments during high-temperature sterilization, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, so that the cost is not increased, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

In some embodiments, the adjusting one or more of the rotational speed of the outdoor dc motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger includes: and if the temperature value of the indoor heat exchanger is smaller than a first preset sterilization temperature value, controlling the compressor to gradually increase the frequency according to a preset frequency adjustment amount on the basis of the initial frequency so as to correspondingly increase the temperature value of the indoor heat exchanger until the temperature value of the indoor heat exchanger is larger than or equal to the first preset sterilization temperature value and smaller than a second preset sterilization temperature value.

In some embodiments, the adjusting one or more of the rotational speed of the outdoor dc motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger includes: and if the temperature value of the indoor heat exchanger is greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, controlling the compressor to continuously run at the initial frequency so as to maintain the temperature value of the indoor heat exchanger.

In some embodiments, the adjusting one or more of the rotational speed of the outdoor dc motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger includes: if the temperature value of the indoor heat exchanger is larger than a second preset sterilization temperature value, controlling the compressor to gradually reduce the frequency according to a preset frequency regulating quantity on the basis of the initial frequency so as to correspondingly reduce the temperature value of the indoor heat exchanger; in the process of reducing the frequency of the compressor, if the temperature value of the indoor heat exchanger is reduced to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, and the frequency of the compressor is greater than or equal to a lowest frequency threshold value of the compressor at the moment, controlling the compressor to operate according to the frequency of the compressor at the moment; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the frequency of the compressor is reduced to the lowest frequency threshold value of the compressor at the moment, controlling the outdoor direct current motor to gradually reduce the rotating speed according to a preset step length on the basis of the initial rotating speed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

In some embodiments, after controlling the outdoor dc motor to gradually decrease the rotation speed according to a first preset step based on the preset rotation speed, the method further includes: in the process of reducing the rotating speed of the outdoor direct current motor, if the temperature value of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value, and the rotating speed of the outdoor direct current motor is greater than or equal to the lowest rotating speed threshold value of the outdoor direct current motor at the moment, controlling the outdoor direct current motor to operate according to the rotating speed of the outdoor direct current motor at the moment; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the rotating speed of the outdoor direct current motor is reduced to the lowest rotating speed threshold value of the outdoor direct current motor at the moment, controlling the outdoor direct current motor to be turned off, and controlling the outdoor direct current motor to be turned on again until the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value, and operating according to the lowest rotating speed threshold value of the outdoor direct current motor to correspondingly increase the temperature of the indoor heat exchanger.

In some embodiments, after the re-controlling the outdoor dc motor to be turned on and operating according to the minimum rotation speed threshold of the outdoor dc motor, the method further includes: if the temperature value of the indoor heat exchanger is increased to be greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value, controlling the outdoor direct current motor to be continuously started and operate according to the minimum rotating speed threshold value of the outdoor direct current motor, and controlling the outdoor direct current motor to be stopped when the temperature value of the indoor heat exchanger is increased to be greater than the second preset sterilization temperature value so as to correspondingly reduce the temperature value of the indoor heat exchanger, and controlling the outdoor direct current motor to be started and operate according to the minimum rotating speed threshold value of the outdoor direct current motor when the temperature value of the indoor heat exchanger is reduced to be less than the first preset sterilization temperature value; the above process is repeatedly executed to alternately control the outdoor direct current motor to be turned on or turned off.

In some embodiments, in the sterilization mode, further comprising: and if the time accumulated by the temperature value of the indoor heat exchanger being greater than the first preset sterilization temperature value reaches a second preset time, controlling the air conditioner to exit the sterilization mode.

To achieve the above object, an embodiment of a second aspect of the present invention proposes a sterilization control apparatus of an air conditioner, the sterilization control apparatus including: the judgment module is used for judging whether the current environment meets a preset condition after receiving the sterilization instruction, wherein the preset condition comprises: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold; the control module is used for controlling an outdoor direct current motor of the air conditioner to operate at a preset initial rotating speed, an indoor motor to operate at a first preset rotating speed and a compressor to operate at a preset initial frequency when the current environment meets preset conditions, meanwhile, the air deflector is controlled to be in a set position, a temperature value of an indoor heat exchanger is obtained after the air deflector operates for a first preset time, one or more of the rotating speed of the outdoor direct current motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, and in the adjusting process, the priority for adjusting the frequency of the compressor is greater than the priority for adjusting the rotating speed of the outdoor direct current motor.

According to the sterilization control device of the air conditioner, when the current environment meets the preset conditions, the air conditioner is controlled to enter a sterilization mode, and high-temperature sterilization is carried out in the sterilization mode, namely, an outdoor direct current motor of the air conditioner is controlled to operate at a preset initial rotating speed, an indoor motor operates at a first preset rotating speed, and a compressor operates at a preset initial frequency, after the air conditioner operates for a first preset time, a temperature value of an indoor heat exchanger is obtained, one or more of the frequency of the compressor and the rotating speed of the outdoor direct current motor are adjusted according to a priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, the rotating speed of the outdoor direct current motor is correspondingly controlled, and the compressor can normally operate in indoor and outdoor high-temperature environments during high-temperature sterilization, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, so that the cost is not increased, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

To achieve the above object, an embodiment of a third aspect of the present invention proposes an air conditioner including: the sterilization control device of the air conditioner of the embodiment; or a processor, a memory, and a sterilization control program of an air conditioner stored on the memory and operable on the processor, the sterilization control program of the air conditioner implementing the sterilization control method of the air conditioner as described in the above embodiments when executed by the processor.

According to the air conditioner provided by the embodiment of the invention, when the current environment meets the preset conditions, the air conditioner is controlled to enter the sterilization mode, and high-temperature sterilization is carried out in the sterilization mode, namely, the outdoor direct current motor of the air conditioner is controlled to run at the preset initial rotating speed, the indoor motor runs at the first preset rotating speed and the compressor runs at the preset initial frequency, and after the air conditioner runs for the first preset time, the temperature value of the indoor heat exchanger is obtained, one or more of the frequency of the compressor and the rotating speed of the outdoor direct current motor are regulated according to the priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, the rotating speed of the outdoor direct current motor is correspondingly controlled, and the compressor can normally run in the indoor and outdoor high-temperature environments during high-temperature sterilization, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, so that the cost is not increased, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

To achieve the above object, an embodiment of a fourth aspect of the present invention proposes a computer-readable storage medium having stored thereon a sterilization control program of an air conditioner, which, when executed by a processor, implements the sterilization control method of the air conditioner as described in the above embodiment.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a diagram illustrating the relationship between the condensing pressure and the operating frequency of a conventional air conditioner;

fig. 2 is a flowchart of a sterilization control method of an air conditioner according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a relationship between a rotation speed of an outdoor DC motor and a temperature value of an indoor heat exchanger according to an embodiment of the present invention;

fig. 4 is a block diagram of a sterilization control apparatus of an air conditioner according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

Controlling the temperature of the indoor heat exchanger above 56 c for a period of time, such as 30 minutes and more, and also requiring the compressor to operate at a higher frequency is difficult to achieve using conventional control methods when the outdoor ambient temperature is high, such as high temperatures in summer. The higher the outdoor environment temperature is, the more easily the driving step-out fault shutdown is triggered, and the problems of over-standard pressure of the refrigeration system and the like are caused, for example, the operation reliability and the electric control driving reliability of the refrigeration system are greatly examined in hot weather of more than 40 ℃. In view of the above, the sterilization control method of the air conditioner according to the embodiment of the present invention needs to control the lowest frequency of the compressor to 30Hz or more in order to ensure the reliability of the operation of the compressor, and to take into account the hysteresis of the control of the condensing temperature instead of the pressure and the reliability of the control, as shown in fig. 1. The minimum reliability operation frequency corresponding to the maximum condensing pressure of different compressors is different. And when the outdoor environment temperature is high, such as high temperature in summer, and the air conditioner needs to be sterilized, the rotating speed of the outdoor direct current motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger and the priority order, so that the compressor is ensured to run at a high frequency during high-temperature sterilization in summer, the problems of driving out-of-step shutdown and overhigh condensation pressure caused by low-frequency running of the compressor are avoided, and the running reliability of the compressor and the high-temperature sterilization reliability of the air conditioner are improved.

The following describes a sterilization control method for an air conditioner according to an embodiment of the present invention.

The sterilization control method of the air conditioner according to the embodiment of the present invention is described below with reference to fig. 2, and as described in fig. 2, the sterilization control method of the air conditioner according to the embodiment of the present invention includes at least steps S1 and S2.

Step S1, after receiving the sterilization instruction, determining whether the current environment meets a preset condition, wherein the preset condition includes: the indoor ambient temperature is greater than or equal to a first temperature threshold, and the outdoor ambient temperature is greater than or equal to a second temperature threshold.

In an embodiment, the preset condition is that the indoor ambient temperature is greater than or equal to the first temperature threshold, and the outdoor ambient temperature is greater than or equal to the second temperature threshold, and the ambient temperature is considered to be higher, that is, the air conditioner is in a high-temperature environment, such as summer. After receiving the sterilization instruction, it is necessary to determine whether the current environment meets a preset condition, thereby determining whether the current environment is a high-temperature environment. Specifically, the indoor environment temperature is, for example, denoted as Tin, the outdoor environment temperature is, for example, denoted as Tout, the first temperature threshold is, for example, denoted as T1, the second temperature threshold is, for example, denoted as T2, and it is determined whether the current environment meets the preset conditions, that is, whether the indoor environment temperature Tin is greater than or equal to the first temperature threshold T1, for example, Tin ≧ T1, and the outdoor environment temperature Tout is greater than or equal to the second temperature threshold T2, for example, Tout ≧ T2; if the indoor ambient temperature Tin and the outdoor ambient temperature Tout are met at the same time, the indoor ambient temperature Tin and the outdoor ambient temperature Tout are considered to be higher, for example, the current environment is in a high-temperature environment in summer. Or, the current season may be located through an APP (application) terminal bound to the air conditioner, where the background is set in advance with respect to each season and the indoor ambient temperature Tin and the outdoor ambient temperature Tout corresponding to each season, for example, if it is determined that the current city is beijing and the current time is 7 months, it is determined that the current city is in summer, and the current indoor ambient temperature Tin and the current outdoor ambient temperature Tout meet the preset conditions.

For example, the user may issue a sterilization command through, but not limited to, an air conditioner remote controller or a related key on an operation interface on the body of the air conditioner, and after receiving the sterilization command, the air conditioner detects the indoor ambient temperature Tin and the outdoor ambient temperature Tout, and determines whether the current environment meets a preset condition, for example, the first temperature threshold T1 is 25 ℃, the second temperature threshold T2 is 24 ℃, when detecting the indoor ambient temperature Tin is 27 ℃ and the outdoor ambient temperature Tout is 33 ℃, the indoor ambient temperature Tin is considered to be greater than the first temperature threshold T1, and the outdoor ambient temperature Tout is greater than the second temperature threshold T2, at this time, the current environment is considered to meet the preset condition, and the current ambient temperature is higher, for example, in summer. Or after the air conditioner receives the sterilization instruction, the air conditioner positions the seasons of the current time at each place through the APP terminal, and if the current time is Beijing and July or August, the current environment is considered to meet the preset conditions, for example, the air conditioner is in a high-temperature working condition in summer.

Step S2, if the current environment meets the preset condition, controlling the air conditioner to enter a sterilization mode, wherein in the sterilization mode, the method includes: the method comprises the steps of controlling an outdoor direct current motor of the air conditioner to operate at a preset initial rotating speed, controlling an indoor motor to operate at a first preset rotating speed and controlling a compressor to operate at a preset initial frequency, simultaneously controlling an air deflector to be at a set position, obtaining a temperature value of an indoor heat exchanger after operating for a first preset time, adjusting one or more of the rotating speed of the outdoor direct current motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger, and in the adjusting process, adjusting the frequency of the compressor with a priority greater than adjusting the rotating speed of the outdoor direct current motor.

In an embodiment, when the current environment meets a preset condition, for example, high temperature in summer, the air conditioner is controlled to enter a sterilization mode for high temperature sterilization. The essence of sterilization is heating, so, in the sterilization mode, the air conditioner operates in the heating mode, the indoor environment temperature is high in summer, and in order to avoid the situation that the indoor environment temperature is too high and quickly reaches the set temperature of the air conditioner, so that the air conditioner is stopped when reaching the temperature, the set temperature Ts is set to be far greater than the upper limit temperature value of the settable temperature, for example, the upper limit value of the settable temperature is 32 ℃, and then the set temperature Ts is set to be 50 ℃. Meanwhile, the rotating speed of the outdoor direct current motor and the frequency of the compressor are correspondingly controlled.

It can be understood that when the sterilization function is started, the rotating speed of the outdoor direct current motor is reduced or increased, and the temperature of the indoor heat exchanger is reduced or increased along with the reduction or the increase; the rotating speed of the indoor motor is reduced, and the temperature of the indoor heat exchanger is increased along with the reduction of the rotating speed of the indoor motor; the frequency of the compressor decreases or increases, and the temperature of the indoor heat exchanger decreases or increases.

Specifically, the rotation speed of the outdoor dc motor is generally set to three or more gears, and when three gears are set, such as a high windshield rotation speed, a medium windshield rotation speed, and a low windshield rotation speed, they are respectively denoted as R _ H, R _ M and R _ L; or, when more than three gears are provided, for example, when 12 gears of rotation speed are provided, the highest windshield rotation speed is recorded as R12, and the lowest windshield rotation speed is recorded as R1. The speed of the indoor motor is typically provided with three or more gear positions, such as a high damper speed, e.g., r _ H, a medium damper speed, e.g., r _ M, and a low damper speed, e.g., r _ L.

The following describes a process of correspondingly controlling the rotation speed of the outdoor dc motor and the frequency of the compressor after the air conditioner enters the sterilization mode, taking the outdoor dc motor with three gears as an example.

After the air conditioner is controlled to enter the sterilization mode, the rotation speed of the outdoor dc motor is controlled to be a preset initial rotation speed, for example, the low windshield rotation speed R (0) ═ R _ L ═ 600rpm, the indoor motor is controlled to be a first preset rotation speed, for example, the low windshield rotation speed R _ L ═ 800rpm, and the compressor is controlled to operate at a preset initial frequency for a first preset time. Specifically, the initial frequency of the compressor is, for example, denoted as F (0), and F (0) is 45Hz, it is understood that, in order to satisfy the reliability of the compressor, the initial frequency F (0) of the compressor is greater than the lowest frequency of the summer high-temperature sterilization, where, for example, denoted as F _ low, then F (0) > F _ low, and F _ low is greater than the minimum frequency of the air conditioner during normal heating. The lowest frequency F _ low of the high-temperature sterilization in summer can meet the reliable operation of the heavy load low frequency of the compressor and the minimum reliable operation frequency corresponding to the maximum condensing power specified by the compressor. Therefore, in the high-temperature sterilization process of the air conditioner, the initial frequency F (0) of the compressor is always controlled to be above the lowest frequency F _ low of the high-temperature sterilization in summer, and the reliability of the operation of the compressor during the high-temperature sterilization in summer can be ensured. Meanwhile, the air deflector is controlled to be at a set position, so that the air outlet direction of the air conditioner can be air outlet along the horizontal direction or air outlet at a certain inclined included angle with the horizontal direction, wherein the angle range of the inclined included angle can be 0-30 degrees, for example, the air deflector is controlled to be at the position of a patio airflow, so that the air deflector guides the airflow to blow towards a ceiling, hot air blown out by an indoor fan is reduced, and the rotating speed of an indoor motor is controlled to be a low windshield rotating speed r _ L which is 800rpm, so that the comfort of a user is improved. The F _ low is a preset value, the F _ low values corresponding to different compressors are different, the F _ low is generally determined comprehensively by technical requirements in a specification of the compressor and a specific driving scheme of the air conditioner, and generally, the F _ low value is 35Hz at the minimum.

Further, after the operation for a first preset time, for example, 2 minutes, a temperature value of the indoor heat exchanger is obtained, for example, recorded as Tc. After the temperature value Tc of the indoor heat exchanger is obtained, one or more of the frequency of the compressor and the rotating speed of the outdoor direct current motor are adjusted according to the temperature value Tc of the indoor heat exchanger and the priority sequence, so that the frequency of the compressor and the rotating speed of the outdoor direct current motor can run at normal frequency or rotating speed, the problems of low-frequency running of the compressor, driving desynchronized shutdown and overhigh condensation pressure are avoided, the temperature of the indoor heat exchanger is guaranteed to meet the sterilization temperature requirement, and the running reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

According to the sterilization control method of the air conditioner, when the current environment meets the preset conditions, the air conditioner is controlled to enter a sterilization mode, and high-temperature sterilization is carried out in the sterilization mode, namely, an outdoor direct current motor of the air conditioner is controlled to operate at a preset initial rotating speed, an indoor motor operates at a first preset rotating speed, and a compressor operates at a preset initial frequency, after the air conditioner operates for a first preset time, a temperature value of an indoor heat exchanger is obtained, one or more of the frequency of the compressor and the rotating speed of the outdoor direct current motor are adjusted according to a priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, the rotating speed of the outdoor direct current motor is correspondingly controlled, and the compressor can normally operate in indoor and outdoor high-temperature environments during high-temperature sterilization, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, so that the cost is not increased, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

In the embodiment of the present invention, an interval formed by an upper limit sterilization temperature value and a lower limit sterilization temperature value is defined as a sterilization temperature interval, the lower limit sterilization temperature value is, for example, a first preset sterilization temperature value, which is denoted as Tc1, and the upper limit sterilization temperature value is, for example, a second preset sterilization temperature value, which is denoted as Tc2, the temperature value Tc of the indoor heat exchanger is between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, and when, for example, Tc1 is not less than Tc < Tc2, the temperature value Tc of the indoor heat exchanger is considered to be in the sterilization temperature interval.

Specifically, the first predetermined sterilization temperature value Tc1 is determined by the minimum sterilization temperature, typically 56 ℃, the second predetermined sterilization temperature value Tc2 is determined by the maximum condensing pressure of the compressor specification, the condensing temperature corresponding to the maximum condensing pressure is 64 ℃, and the corresponding second predetermined sterilization temperature value Tc2 is, for example, 60 ℃. The adjustment process of the rotation speed of the outdoor dc motor and the frequency of the compressor will be described below by taking the first predetermined sterilization temperature value Tc1 as 56 ℃ and the second predetermined sterilization temperature value Tc2 as 60 ℃.

In some embodiments, adjusting one or more of the speed of the outdoor dc motor and the frequency of the compressor based on the temperature value of the indoor heat exchanger comprises: and if the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value, controlling the compressor to gradually increase the frequency based on the initial frequency according to the preset frequency adjustment quantity so as to correspondingly increase the temperature value of the indoor heat exchanger until the temperature value of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value.

For example, after the air conditioner operates for a first preset time, for example, after the air conditioner operates for 2 minutes, the temperature value Tc of the indoor heat exchanger is obtained, if the temperature value Tc of the indoor heat exchanger is 50 ℃, the temperature value Tc of the indoor heat exchanger is considered to be smaller than a first preset sterilization temperature value Tc1, that is, Tc is smaller than Tc1, the temperature value Tc of the indoor heat exchanger is considered to be lower, and the sterilization effect cannot be guaranteed.

Specifically, the compressor is controlled to increase the frequency successively by a preset frequency adjustment amount, for example, denoted as Δ F, based on the initial frequency F (0) being 45Hz, the frequency is increased successively by the preset frequency adjustment amount Δ F, for example, F (1) being F (0) +5 being 45+5 being 50Hz, F (2) being F (1) +5 being 50+5 being 55Hz, and so on, and the frequency of the compressor is increased successively by F (n +1) being F (n) + Δ F. In the process of increasing the frequency of the compressor, the temperature value Tc of the indoor heat exchanger needs to be periodically obtained with a preset time as a period, for example, the temperature value Tc of the indoor heat exchanger is obtained again every 10s, for example, after a plurality of periods, the temperature value Tc of the indoor heat exchanger is increased to be greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc2, and the temperature value Tc of the indoor heat exchanger is always between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, for example, is always between 57 ℃ and 60 ℃, and then the frequency of the compressor is kept unchanged at this time, so that the temperature value Tc of the indoor heat exchanger is maintained within the sterilization temperature interval.

In some embodiments, adjusting one or more of the speed of the outdoor dc motor and the frequency of the compressor based on the temperature value of the indoor heat exchanger comprises: and if the temperature value of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value, controlling the compressor to continuously run at the initial frequency so as to maintain the temperature value of the indoor heat exchanger.

In a specific embodiment, after the air conditioner operates for a first preset time, for example, after 2 minutes, a temperature value Tc of the indoor heat exchanger is obtained, and if the temperature value Tc of the indoor heat exchanger is greater than or equal to a first preset sterilization temperature value Tc1 and less than a second preset sterilization temperature value Tc2, for example, Tc1 ≦ Tc < Tc2, the temperature value Tc of the indoor heat exchanger is considered to be in a sterilization temperature interval, at this time, the compressor is controlled to operate continuously at an initial frequency, that is, the compressor is controlled to operate continuously at F (n +1) ═ F (n), for example, the compressor is controlled to operate continuously at an initial frequency F (0) ═ 45Hz, so that the temperature value Tc of the indoor heat exchanger is kept in the sterilization temperature interval, and thus, the sterilization effect of the air conditioner is ensured.

In some embodiments, adjusting one or more of the speed of the outdoor dc motor and the frequency of the compressor based on the temperature value of the indoor heat exchanger comprises: if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value, controlling the compressor to gradually reduce the frequency according to the preset frequency regulating quantity on the basis of the initial frequency so as to correspondingly reduce the temperature value of the indoor heat exchanger; in the process of reducing the frequency of the compressor, if the temperature value of the indoor heat exchanger is reduced to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, and the frequency of the compressor is greater than or equal to the lowest frequency threshold value of the compressor at the moment, controlling the compressor to operate according to the frequency of the compressor at the moment; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the frequency of the compressor is reduced to the lowest frequency threshold value of the compressor at the moment, controlling the outdoor direct current motor to gradually reduce the rotating speed according to the preset step length on the basis of the initial rotating speed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

For example, after the air conditioner is operated for a first preset time, for example, after the air conditioner is operated for 2 minutes, the temperature value Tc of the indoor heat exchanger is obtained, if the temperature value Tc of the indoor heat exchanger is 63 ℃ > 60 ℃, the temperature value Tc of the indoor heat exchanger is considered to be greater than a second preset sterilization temperature value Tc2, that is, Tc > Tc2, at this time, the temperature value Tc of the indoor heat exchanger is considered to be higher, the temperature value Tc of the indoor heat exchanger needs to be reduced, so that the temperature value Tc of the indoor heat exchanger is between a first preset sterilization temperature value Tc1 and a second preset sterilization temperature value Tc2, that is, the temperature value Tc of the indoor heat exchanger is in a sterilization temperature range, at this time, one or more of the rotation speed of the outdoor dc motor and the frequency of the compressor are adjusted according to a priority adjustment sequence of the rotation speed of the outdoor dc motor and the frequency of the compressor, and since the priority for adjusting the frequency of the compressor is highest, therefore, when the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature value Tc2, the frequency of the compressor is adjusted.

Specifically, the compressor is controlled to gradually decrease the frequency according to the preset frequency adjustment amount, the preset frequency adjustment amount is Δ F, the frequency of the compressor is gradually decreased according to the preset frequency adjustment amount Δ F based on the initial frequency F (0) being 45Hz, for example, F (1) F (0) -5 being 45-5 being 40Hz, and so on, the frequency of the compressor is gradually decreased according to F (n +1) F (n) - Δ F, in the process of decreasing the frequency of the compressor, the temperature value Tc of the indoor heat exchanger needs to be periodically obtained for a preset time period, for example, every 10s, the temperature value Tc of the indoor heat exchanger is obtained, for example, after 10s, if the temperature value Tc of the indoor heat exchanger is decreased to be greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc2, and the frequency of the compressor is greater than or equal to the lowest frequency threshold value of the compressor at the time, it is considered that the temperature value Tc of the indoor heat exchanger can be reduced to between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, that is, to the sterilization temperature interval, at this time, it is not necessary to continuously control the frequency of the compressor to be reduced, and the compressor is controlled to operate according to the current frequency, so that the temperature value Tc of the indoor heat exchanger is maintained in the sterilization temperature interval.

If the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature value Tc2 and there is no significant trend of decreasing, for example, the temperature value Tc of the indoor heat exchanger is 60 ℃, and the frequency of the compressor has been decreased to a lowest frequency threshold value of the compressor, for example, the frequency of the compressor has been decreased to F35 Hz, where the lowest frequency threshold value of the compressor is the lowest frequency F _ low during high-temperature sterilization in summer, at this time, it is considered that the temperature value Tc of the indoor heat exchanger cannot be decreased to the sterilization temperature range only by decreasing the frequency of the compressor, at this time, according to the priority adjustment sequence, the rotation speed of the outdoor dc motor needs to be adjusted, and when the rotation speed of the outdoor dc motor is adjusted, the outdoor dc motor needs to be controlled to decrease the rotation speed gradually according to the preset step length based on the initial rotation speed, so as to correspondingly decrease the temperature value of the indoor. By comparing the size relationship between the temperature value Tc of the indoor heat exchanger and the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, when the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature value Tc2, the frequency of the compressor and the rotating speed of the outdoor direct current motor are adjusted according to the priority adjustment sequence, and therefore the temperature value Tc of the indoor heat exchanger is reduced, and the temperature value Tc of the indoor heat exchanger is reduced to the sterilization temperature interval. In other words, due to the influence of high temperature in summer and the requirement that the compressor is operated at a relatively high frequency, when the frequency of the compressor is gradually decreased according to F (n +1) ═ F (n) — Δ F and is decreased to the lowest frequency threshold of the compressor, if the temperature value Tc of the indoor heat exchanger is still greater than the second preset sterilization temperature value Tc2, thereby causing the condensation temperature of the refrigeration system to exceed the standard, the rotation speed of the outdoor dc motor needs to be controlled to gradually decrease based on the initial rotation speed, so as to decrease the temperature value Tc of the indoor heat exchanger.

In some embodiments, after controlling the outdoor dc motor to gradually decrease the rotation speed according to a first preset step length based on the preset rotation speed, the method further includes: in the process of reducing the rotating speed of the outdoor direct current motor, if the temperature value of the indoor heat exchanger is greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, and the rotating speed of the outdoor direct current motor is greater than or equal to the lowest rotating speed threshold value of the outdoor direct current motor at the moment, controlling the outdoor direct current motor to operate according to the rotating speed of the outdoor direct current motor at the moment; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the rotating speed of the outdoor direct current motor is reduced to the lowest rotating speed threshold value of the outdoor direct current motor at the moment, controlling the outdoor direct current motor to be turned off, and controlling the outdoor direct current motor to be turned on again when the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value, and operating according to the lowest rotating speed threshold value of the outdoor direct current motor to correspondingly increase the temperature of the indoor heat exchanger. The preset rotation speed R (0) of the outdoor dc motor is equal to R _ L, the minimum rotation speed threshold of the outdoor dc motor is, for example, denoted as Rmin, and Rmin is lower than R _ L.

For example, in the process of reducing the rotation speed of the outdoor dc motor, the outdoor dc motor needs to be controlled to gradually reduce the rotation speed based on a first preset step length, which is, for example, denoted as Δ R, to reduce the temperature value Tc of the indoor heat exchanger, based on a first preset step length, which is, based on a preset rotation speed R (0) R _ L600 rpm, the rotation speed of the outdoor dc motor is gradually reduced according to the first preset step length Δ R, that is, R (1) -R (0) -50-600-50-550 rpm, R (2) -R (1) -50-550-50-500 rpm, and so on, the rotation speed of the outdoor dc motor is gradually reduced according to R (n +1) -R (n) -R, the temperature Tc of the indoor heat exchanger needs to be obtained in the process of gradually reducing the rotation speed of the outdoor dc motor, and if the temperature value Tc of the indoor dc motor is reduced to be greater than or equal to the first preset sterilization temperature value Tc and is less than the second preset sterilization temperature value 1, the temperature value Tc needs to be obtained in the process of the indoor heat exchanger And the sterilization temperature value Tc2, and at this time, the rotating speed of the outdoor direct current motor is greater than or equal to the lowest rotating speed threshold of the outdoor direct current motor, the rotating speed of the outdoor direct current motor is adjusted after the frequency of the compressor is adjusted to the lowest frequency threshold, so that the rotating speed of the outdoor direct current motor and the rotating speed of the outdoor direct current motor are adjusted together, the temperature value Tc of the indoor heat exchanger can be reduced to the sterilization temperature interval, at this time, the rotating speed of the outdoor direct current motor does not need to be continuously reduced, the outdoor direct current motor is controlled to operate according to the rotating speed at this time, and the temperature value Tc.

If the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature value Tc2 and there is no significant trend of decreasing, and the rotation speed of the outdoor dc motor has decreased to the minimum rotation speed threshold Rmin of the outdoor dc motor, for example, the rotation speed of the outdoor dc motor has decreased to Rmin 150rpm, it is considered that the temperature value Tc of the indoor heat exchanger cannot be decreased to the sterilization temperature range by decreasing the frequency of the compressor and the rotation speed of the outdoor dc motor, at this time, the outdoor dc motor is controlled to be turned OFF, for example, the outdoor dc motor is controlled to be in an OFF state, so as to rapidly decrease the temperature value Tc of the indoor heat exchanger until the temperature value Tc of the indoor heat exchanger is decreased to be less than the first preset sterilization temperature value Tc1, for example, the temperature value Tc of the indoor heat exchanger is 55 ℃ < 56 ℃, at this time, the outdoor dc motor is controlled to be turned on again, and the outdoor dc motor is controlled to operate at the minimum rotation speed threshold, for example, the external dc motor is controlled to run at Rmin 150 rpm. When the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature threshold Tc2, the temperature value Tc of the indoor heat exchanger is controlled between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2 by controlling the rotation speed of the outdoor direct current motor to be reduced or controlling the outdoor direct current motor to be turned on or off. In other words, if the rotation speed of the outdoor dc motor has been reduced to the minimum rotation speed threshold Rmin of the outdoor dc motor, and at this time, the temperature value Tc of the indoor heat exchanger is still greater than the second predetermined sterilization temperature threshold Tc2, the outdoor dc motor is controlled to be turned off, when the outdoor dc motor is turned off, the evaporation pressure of the refrigeration system is rapidly reduced, so as to drive the condensation pressure to rapidly decrease, at this time, the temperature value Tc of the indoor heat exchanger must be reduced to be less than the first predetermined sterilization temperature value Tc1, and since the outdoor dc motor is turned off, the evaporation pressure rapidly and greatly decreases, so that the condensation temperature also rapidly decreases, during a certain detection period, if the temperature value Tc of the indoor heat exchanger is less than the first predetermined sterilization temperature value Tc1, for example, Tc < Tc1, the outdoor dc motor is controlled to be turned ON again, for example, and operated at the minimum rotation speed threshold Rmin of the outdoor dc motor, namely, the air conditioner is operated at the lowest reliable operation speed, thereby ensuring the high-temperature sterilization effect of the air conditioner.

In some embodiments, after the outdoor dc motor is controlled to be turned on again and operated according to the minimum rotation speed threshold of the outdoor dc motor, the method further includes: if the temperature value of the indoor heat exchanger is increased to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, controlling the outdoor direct current motor to be continuously started and operate according to the minimum rotating speed threshold value of the outdoor direct current motor, controlling the outdoor direct current motor to be closed until the temperature value of the indoor heat exchanger is increased to be greater than the second preset sterilization temperature value, correspondingly reducing the temperature value of the indoor heat exchanger, and controlling the outdoor direct current motor to be started and operate according to the minimum rotating speed threshold value of the outdoor direct current motor until the temperature value of the indoor heat exchanger is reduced to be less than the first preset sterilization temperature value; the above process is repeatedly executed to alternately control the outdoor direct current motor to be turned on or turned off.

For example, the outdoor dc motor is controlled to be turned on again, and after the outdoor dc motor is operated according to the minimum rotational speed threshold of the outdoor dc motor, the temperature value Tc of the indoor heat exchanger continues to be periodically obtained, if the temperature value Tc of the indoor heat exchanger is increased to be greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc2, for example, the temperature value Tc of the indoor heat exchanger is 59 ℃, the outdoor dc motor is controlled to be turned on continuously, and the outdoor dc motor is operated according to the minimum rotational speed threshold of the outdoor dc motor, for example, the outdoor dc motor is operated according to the minimum rotational speed threshold R of 150rpm, until the temperature value Tc of the indoor heat exchanger is increased again to be greater than the second preset sterilization temperature value Tc2, for example, the temperature value Tc of the indoor heat exchanger is greater than 60 ℃, the outdoor dc motor is controlled to be turned off for reducing the temperature value of the indoor heat exchanger Tc until the temperature value Tc of the indoor heat exchanger is reduced to be less than the first preset sterilization temperature value Tc1, and controlling the outdoor direct current motor to be started again, controlling the outdoor direct current motor to operate at the lowest rotating speed threshold, repeatedly executing the process, and alternately controlling the outdoor direct current motor to be started or closed so that the temperature value Tc of the indoor heat exchanger is kept between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc 2. Therefore, the sterilization effect of the air conditioner is ensured, the running frequency of the compressor is not influenced, the compressor is not too low to stop, and the running reliability of the compressor and the high-temperature sterilization reliability of the air conditioner are improved during high-temperature sterilization. In other words, when the temperature value Tc of the indoor heat exchanger is between the first preset sterilizing temperature value Tc1 and the second preset sterilizing temperature value Tc2, the outdoor dc motor is ON and the rotation speed is Rmin or OFF, depending ON the state of the outdoor dc motor at the last detection cycle. If the outdoor direct current motor is ON and the rotating speed is Rmin in the previous period, the outdoor direct current motor is kept ON and the rotating speed is Rmin in the current period, and if the outdoor direct current motor is OFF in the previous period, the outdoor direct current motor is kept OFF in the current period, namely the outdoor direct current motor is controlled to be switched between OFF and the lowest reliable running rotating speed Rmin.

Fig. 3 is a schematic diagram illustrating a corresponding relationship between a rotation speed of an outdoor dc motor and a temperature value of an indoor heat exchanger according to an embodiment of the present invention. It can be seen that, after the rotation speed of the outdoor dc motor runs for a period of time at the lowest rotation speed threshold of the outdoor dc motor, the temperature value Tc of the indoor heat exchanger is still greater than the second preset sterilization temperature value Tc2, when the outdoor dc motor is stopped, that is, the outdoor dc motor is controlled to be in an OFF state, at this time, the evaporation pressure of the refrigeration system is rapidly reduced, the condensation pressure is driven to be rapidly reduced, and at this time, the temperature value Tc of the indoor heat exchanger is certainly smaller than the first preset sterilization temperature value Tc 1.

In some embodiments, in the sterilization mode, further comprising: and if the time accumulation that the temperature value of the indoor heat exchanger is greater than the first preset sterilization temperature value reaches the second preset time, controlling the air conditioner to exit the sterilization mode. Specifically, after the air conditioner enters the sterilization mode, the time that the temperature value Tc of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value Tc1 is counted, namely, the time that Tc is greater than or equal to Tc1 is accumulated, when the accumulated time reaches a second preset time, for example, 40 minutes, the sterilization time of the air conditioner in the sterilization mode is considered to meet the sterilization time requirement, and at the moment, the air conditioner is controlled to exit the sterilization mode. The problem that the air conditioner is not sufficiently sterilized due to too short sterilization time after the air conditioner enters the sterilization mode is solved, and therefore the sterilization effect of the air conditioner is guaranteed.

The following describes the high-temperature sterilization control of the air conditioner by taking a specific example as an example.

In the following examples, the relevant parameters are set as follows: the first temperature threshold T1 is 25 ℃, the second temperature threshold T2 is 24 ℃, the second preset sterilization temperature value Tc2 is 60 ℃, the first preset sterilization temperature value Tc1 is 56 ℃, the first preset time T1 is 2min, the rotation speed of the outdoor direct current motor, the rotation speed of the indoor motor and the detection period T2 of the frequency of the compressor are 10s, the second preset time T3 is 40min, the set temperature Ts is 50 ℃, the lowest frequency threshold F _ low is 35Hz, the frequency increment Δ F is 5Hz, the initial frequency F (0) of the compressor is 45Hz, the initial rotation speed R _ L of the outdoor direct current motor is 600rpm, the first preset Δ R is 50rpm, the lowest rotation speed threshold Rmin of the outdoor direct current motor is 150rpm, and the first preset rotation speed R _ L of the indoor motor is 800 rpm.

In the first embodiment, the air conditioner receives the sterilization command, detects that the indoor environment temperature Tin is 27 ℃ and the outdoor environment temperature Tout is 33 ℃, and at this time, determines that the indoor environment temperature Tin is greater than the first temperature threshold T1 and the outdoor environment temperature Tout is greater than the second temperature threshold T2, determines that the current environment meets the preset condition, controls the air conditioner to operate the sterilization mode, and sets the set temperature Ts to 50 ℃. In the sterilization mode, the initial rotating speed of the indoor motor runs at a low wind gear rotating speed r (0) ═ r _ L ═ 800rpm, and the air deflector is positioned at the airflow position of the patio. The initial rotation speed of the outdoor direct current motor is R (0) ═ R _ L ═ 600rpm, and the initial frequency F (0) ═ 45 Hz. After the air conditioner is operated for a first preset time, for example, 2min, the temperature value Tc of the indoor heat exchanger is 58 ℃, and the rotating speed of the outdoor direct current motor and the frequency of the compressor are kept unchanged in the sterilization temperature interval. After 10s, if the temperature value Tc of the indoor heat exchanger is greater than 60 ℃, the temperature value Tc of the indoor heat exchanger is considered to be high, and at this time, the frequency of the compressor is controlled to be reduced, for example, the frequency of the compressor is gradually reduced according to F (n +1) ═ F (n) - Δ F, for example, F (1) ═ F (0) -5 ═ 45-5 ═ 40 Hz; after a plurality of detection cycles, Tc is 58 ℃, F (n +1) is 35Hz and F _ low, the lowest frequency F _ low of summer high-temperature sterilization is already reached, the temperature value Tc of the subsequent indoor heat exchanger is always maintained between 57 ℃ and 60 ℃, and then the lowest frequency F _ low of summer high-temperature sterilization is kept unchanged. And when the accumulated time of the temperature Tc of the indoor heat exchanger is more than 56 ℃ for more than 40min, the high-temperature sterilization mode is exited.

In the second embodiment, the air conditioner receives the sterilization command, detects that the indoor environment temperature Tin is 27 ℃ and the outdoor environment temperature Tout is 42 ℃, and at this time, considers that the indoor environment temperature Tin is greater than the first temperature threshold T1 and the outdoor environment temperature Tout is greater than the second temperature threshold T2, determines that the current environment meets the preset condition, controls the air conditioner to operate the sterilization mode, and sets the set temperature Ts to 50 ℃. In the sterilization mode, the indoor motor runs at a low wind gear rotating speed r (0) ═ r _ L ═ 800rpm, and the air deflector is positioned at the position of the air flow of the patio. The initial rotation speed of the outdoor direct current motor is R (0) ═ R _ L ═ 600rpm, and the initial frequency of the compressor is F (0) ═ 45 Hz. After the air conditioner heating operation is performed for the first preset time, for example, after 2min, the temperature value Tc of the indoor heat exchanger is 58 ℃, and the rotating speed of the outdoor direct current motor and the frequency of the compressor are kept unchanged. After 10s, if the temperature value Tc of the indoor heat exchanger is 63 ℃ > 60 ℃, the frequency of the compressor is controlled to be reduced, for example, F (1) ═ F (0) -5 ═ 45-5 ═ 40 Hz; after several cycles of testing, Tc is 60 ℃, when F (n +1) is 35Hz, which is the lowest frequency F _ low of summer pasteurization. In the new detection period, when Tc is 62 ℃ > 60 ℃, and the indoor heat exchanger temperature value Tc is considered to be high, the rotation speed of the outdoor direct current motor is controlled to be gradually reduced, for example, R (1) -R (0) -50-600-50-550 rpm are operated. After a number of cycles, the rotational speed of the outdoor dc motor has decreased to a minimum rotational speed threshold Rmin, i.e. a minimum reliable operating rotational speed, for example Rmin 150 rpm. At the moment, Tc is 63 ℃ and is more than 60 ℃, the outdoor direct current motor is controlled to stop running, for example, in an OFF state, so as to rapidly reduce the condensation temperature; after a period of time, Tc is 54 ℃ < 56 ℃, the outdoor direct current motor is controlled to be started, for example, in an ON state, and the outdoor direct current motor is operated at the lowest reliable operation speed. When Tc is more than 60 ℃ again, controlling the outdoor direct current motor to stop running. And repeatedly executing the steps, and controlling the outdoor direct current motor to be turned on or turned off. And when the accumulated time of the temperature Tc of the coil of the indoor heat exchanger is more than 56 ℃ for more than 40min, the high-temperature sterilization mode is exited.

In the third embodiment, the air conditioner receives the sterilization command, detects that the indoor environment temperature Tin is 25 ℃ and the outdoor environment temperature Tout is 24 ℃, and at this time, determines that the indoor environment temperature Tin is greater than the first temperature threshold T1 and the outdoor environment temperature Tout is greater than the second temperature threshold T2, determines that the current environment meets the preset condition, controls the air conditioner to operate the sterilization mode, and sets the set temperature Ts to 50 ℃. In the sterilization mode, the indoor motor runs at a low wind gear rotating speed r (0) ═ r _ L ═ 800rpm, and the air deflector is positioned at the position of the air flow of the patio. The initial rotation speed R (0) of the outdoor dc motor is 600rpm, and the initial frequency F (0) of the compressor is 45 Hz. After the air conditioner heating operation is performed for a first preset time, for example, 2min, when the temperature value Tc of the indoor heat exchanger is 50 ℃, the frequency of the compressor is controlled to increase, for example, according to F (n +1) ═ F (n) + Δ F, the frequency of the compressor is gradually increased, for example, according to F (1) ═ F (0) +5 ═ 45+5 ═ 50 Hz. After a plurality of cycles, the temperature value Tc of the indoor heat exchanger is always maintained between 57 ℃ and 60 ℃, and the frequency of the current compressor is kept unchanged. And when the accumulated time of the temperature value Tc of the indoor heat exchanger is more than 56 ℃ for more than 40min, the high-temperature sterilization mode is exited.

According to the sterilization control method of the air conditioner, when the current environment meets the preset conditions, the air conditioner is controlled to enter a sterilization mode, and high-temperature sterilization is carried out in the sterilization mode, namely, an outdoor direct current motor of the air conditioner is controlled to operate at a preset initial rotating speed, an indoor motor operates at a first preset rotating speed, and a compressor operates at a preset initial frequency, after the air conditioner operates for a first preset time, a temperature value of an indoor heat exchanger is obtained, one or more of the frequency of the compressor and the rotating speed of the outdoor direct current motor are adjusted according to a priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, the rotating speed of the outdoor direct current motor is correspondingly controlled, and the compressor can normally operate in indoor and outdoor high-temperature environments during high-temperature sterilization, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, so that the cost is not increased, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

A sterilization control apparatus of an air conditioner according to an embodiment of the second aspect of the present invention will be described with reference to fig. 4.

Fig. 4 is a block diagram of a sterilization control apparatus of an air conditioner according to an embodiment of the present invention. As shown in fig. 4, the sterilization control device 2 of the air conditioner according to the embodiment of the present invention includes a determination module 20 and a control module 21.

Wherein, the judging module is used for judging whether the current environment meets the preset conditions after receiving the sterilization instruction, wherein the preset conditions comprise: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold; the control module is used for controlling an outdoor direct current motor of the air conditioner to operate at a preset initial rotating speed, an indoor motor to operate at a first preset rotating speed and a compressor at a preset initial frequency when the current environment meets preset conditions, meanwhile, the air deflector is controlled to be in a set position, a temperature value of the indoor heat exchanger is obtained after the indoor heat exchanger operates for a first preset time, one or more of the rotating speed of the outdoor direct current motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, and in the adjusting process, the priority for adjusting the frequency of the compressor is greater than the priority for adjusting the rotating speed of the outdoor direct current motor.

According to the sterilization control device 2 of the air conditioner of the embodiment of the invention, when the current environment meets the preset conditions, the air conditioner is controlled to enter the sterilization mode, and high-temperature sterilization is carried out in the sterilization mode, namely, the outdoor direct current motor of the air conditioner is controlled to run at the preset initial rotating speed, the indoor motor is controlled to run at the first preset rotating speed and the compressor is controlled to run at the preset initial frequency, and after the air conditioner runs for the first preset time, the temperature value of the indoor heat exchanger is obtained, and one or more of the frequency of the compressor and the rotating speed of the outdoor direct current motor are adjusted according to the priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, the rotating speed of the outdoor direct current motor is correspondingly controlled, and the compressor can normally run in the indoor and outdoor high-temperature environments during high-temperature sterilization, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, so that the cost is not increased, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

In some embodiments, the control module 21 is specifically configured to, when the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value, control the compressor to gradually increase the frequency according to the preset frequency adjustment amount on the basis of the initial frequency, so as to correspondingly increase the temperature value of the indoor heat exchanger until the temperature value of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value and is less than the second preset sterilization temperature value.

In some embodiments, the control module 21 is specifically configured to control the compressor to continuously operate at the initial frequency to maintain the temperature value of the indoor heat exchanger when the temperature value of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value.

In some embodiments, the control module 21 is specifically configured to, when the temperature value of the indoor heat exchanger is greater than a second preset sterilization temperature value, control the compressor to gradually decrease the frequency according to a preset frequency adjustment amount on the basis of the initial frequency so as to correspondingly decrease the temperature value of the indoor heat exchanger; in the process of reducing the frequency of the compressor, when the temperature value of the indoor heat exchanger is reduced to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, and the frequency of the compressor is greater than or equal to the lowest frequency threshold value of the compressor at the moment, controlling the compressor to operate according to the frequency of the compressor at the moment; and when the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the frequency of the compressor is reduced to the lowest frequency threshold value of the compressor at the moment, controlling the outdoor direct current motor to gradually reduce the rotating speed according to the preset step length on the basis of the initial rotating speed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

In some embodiments, the control module 21 is further configured to, in a process of reducing the rotation speed of the outdoor direct current motor, when the temperature value of the indoor heat exchanger is greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, and the rotation speed of the outdoor direct current motor is greater than or equal to a minimum rotation speed threshold of the outdoor direct current motor at this time, control the outdoor direct current motor to operate according to the rotation speed of the outdoor direct current motor at this time; and when the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the rotating speed of the outdoor direct current motor is reduced to the lowest rotating speed threshold value of the outdoor direct current motor at the moment, controlling the outdoor direct current motor to be turned off, and when the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value, controlling the outdoor direct current motor to be turned on again, and operating according to the lowest rotating speed threshold value of the outdoor direct current motor to correspondingly increase the temperature of the indoor heat exchanger.

In some embodiments, the control module 21 is further configured to, when the temperature value of the indoor heat exchanger is increased to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, control the outdoor direct current motor to be continuously started and operate according to a minimum rotation speed threshold of the outdoor direct current motor, until the temperature value of the indoor heat exchanger is increased to be greater than the second preset sterilization temperature value, control the outdoor direct current motor to be stopped to correspondingly reduce the temperature value of the indoor heat exchanger, and until the temperature value of the indoor heat exchanger is reduced to be less than the first preset sterilization temperature value, control the outdoor direct current motor to be started and operate according to the minimum rotation speed threshold of the outdoor direct current motor; the above processes are repeatedly executed to alternately control the outdoor direct current motor to be turned on or turned off.

In some embodiments, in the sterilization mode, further comprising: and if the time accumulation that the temperature value of the indoor heat exchanger is greater than the first preset sterilization temperature value reaches the second preset time, controlling the air conditioner to exit the sterilization mode.

It should be noted that a specific implementation manner of the sterilization control device 2 of the air conditioner according to the embodiment of the present invention is similar to a specific implementation manner of the sterilization control method of the air conditioner according to any of the above embodiments of the present invention, and please refer to the description of the method part specifically, and details are not repeated here in order to reduce redundancy.

According to the sterilization control device 2 of the air conditioner of the embodiment of the invention, when the current environment meets the preset conditions, the air conditioner is controlled to enter the sterilization mode, and high-temperature sterilization is carried out in the sterilization mode, namely, the outdoor direct current motor of the air conditioner is controlled to run at the preset initial rotating speed, the indoor motor is controlled to run at the first preset rotating speed and the compressor is controlled to run at the preset initial frequency, and after the air conditioner runs for the first preset time, the temperature value of the indoor heat exchanger is obtained, and one or more of the frequency of the compressor and the rotating speed of the outdoor direct current motor are adjusted according to the priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, the rotating speed of the outdoor direct current motor is correspondingly controlled, and the compressor can normally run in the indoor and outdoor high-temperature environments during high-temperature sterilization, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, so that the cost is not increased, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

An air conditioner according to an embodiment of a third aspect of the present invention is described below, including: the sterilization control device 2 of the air conditioner according to any one of the embodiments; alternatively, the air conditioner includes: the processor, the memory and the sterilization control program of the air conditioner stored on the memory and capable of running on the processor, wherein the sterilization control program of the air conditioner realizes the sterilization control method of the air conditioner of any one of the above embodiments when being executed by the processor.

In this embodiment, when the air conditioner performs sterilization, a specific implementation manner of the air conditioner is similar to a specific implementation manner of the sterilization control device 2 of the air conditioner according to any of the above embodiments of the present invention, and for details, please refer to the description of the sterilization control device 2 of the air conditioner, and in order to reduce redundancy, it is not described herein again.

According to the air conditioner provided by the embodiment of the invention, when the current environment meets the preset conditions, the air conditioner is controlled to enter the sterilization mode, and high-temperature sterilization is carried out in the sterilization mode, namely, the outdoor direct current motor of the air conditioner is controlled to run at the preset initial rotating speed, the indoor motor runs at the first preset rotating speed and the compressor runs at the preset initial frequency, and after the air conditioner runs for the first preset time, the temperature value of the indoor heat exchanger is obtained, one or more of the frequency of the compressor and the rotating speed of the outdoor direct current motor are regulated according to the priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, the rotating speed of the outdoor direct current motor is correspondingly controlled, and the compressor can normally run in the indoor and outdoor high-temperature environments during high-temperature, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, so that the cost is not increased, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

A computer-readable storage medium according to a fourth embodiment of the present invention is described below, the computer-readable storage medium having stored thereon a sterilization control program of an air conditioner, the sterilization control program of the air conditioner, when executed by a processor, implementing the sterilization control method of the air conditioner according to any one of the embodiments described above.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.