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 alternating current motor of the air conditioner to be started, controlling an indoor motor to run at a preset rotating speed and a compressor to run at a preset frequency, simultaneously controlling an air deflector to be at a set position, obtaining a temperature value of an indoor heat exchanger after the air deflector runs for a first preset time, adjusting one or more of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger, and in the adjusting process, adjusting the on or off state of the outdoor alternating current motor at the highest priority and adjusting the frequency of the compressor at the lowest priority.

2. The sterilization control method of an air conditioner according to claim 1, wherein said adjusting one or more of an on or off state of the outdoor ac motor, a rotational speed of the indoor motor, and a frequency of the compressor according to the temperature value of the indoor heat exchanger comprises:

and if the temperature value of the indoor heat exchanger is greater than a second preset sterilization temperature value, controlling the outdoor alternating current motor to be closed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

3. The sterilization control method of an air conditioner according to claim 2, further comprising, after controlling the outdoor ac motor to be turned off:

if the temperature value of the indoor heat exchanger is reduced to be larger than or equal to a first preset sterilization temperature value and smaller than a second preset sterilization temperature value, controlling the outdoor alternating current motor to be continuously closed, and controlling the outdoor alternating current motor to be started again until the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value so as to correspondingly increase the temperature value of the indoor heat exchanger, and controlling the outdoor alternating current motor to be closed again until the temperature value of the indoor heat exchanger is larger than the second preset sterilization temperature value; the above process is repeatedly executed to alternately control the outdoor alternating current motor to be turned on or turned off.

4. The sterilization control method of an air conditioner according to claim 1, wherein said adjusting one or more of an on or off state of the outdoor ac motor, a rotational speed of the indoor motor, and a frequency of the compressor according to the temperature value of the indoor heat exchanger comprises:

if the temperature value of the indoor heat exchanger is smaller than a first preset sterilization temperature value, controlling the outdoor alternating current motor to be kept started so as to correspondingly increase the temperature value of the indoor heat exchanger;

after the outdoor alternating current motor is kept started for a second preset time, if the temperature value of the indoor heat exchanger is always smaller than the first preset sterilization temperature value, the indoor motor is controlled to gradually reduce the rotating speed according to a preset step length on the basis of the preset rotating speed so as to correspondingly increase 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 indoor motor to successively lower a rotation speed by a predetermined step size based on said predetermined rotation speed further comprises:

in the process of reducing the rotating speed of the indoor motor, 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, and the rotating speed of the indoor motor is greater than or equal to the minimum rotating speed threshold value of the indoor motor at the moment, the indoor motor is controlled to operate according to the rotating speed of the indoor motor at the moment.

6. The sterilization control method of an air conditioner according to claim 5, further comprising, in reducing the rotation speed of the indoor motor:

and if the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value and the rotating speed of the indoor motor is reduced to the lowest rotating speed threshold value of the indoor motor at the moment, controlling the compressor to increase the frequency successively according to preset frequency increment on the basis of preset frequency until the temperature value of the indoor heat exchanger is larger than or equal to the first preset sterilization temperature value and smaller than the second preset sterilization temperature value so as to correspondingly increase the temperature value of the indoor heat exchanger.

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 indoor heat exchanger with the temperature value larger than the first preset sterilization temperature value reaches a third 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 alternating current motor of the air conditioner to be started, an indoor motor to run at a preset rotating speed and a compressor to run at a preset frequency when the current environment meets a preset condition, meanwhile, the air deflector is controlled to be in a set position, a temperature value of an indoor heat exchanger is obtained after the indoor heat exchanger runs for a first preset time, one or more of the on-off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, in addition, the priority for adjusting the on-off state of the outdoor alternating current motor is the highest, and the priority for adjusting the frequency of the compressor is the lowest.

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.

To this end, an object of the present invention is to provide a sterilization control method of an air conditioner, which, when controlling the air conditioner to perform high-temperature sterilization, acquiring the temperature value of the indoor heat exchanger, and according to the temperature value of the indoor heat exchanger and the priority order, adjusting one or more of the on or off state of the outdoor AC motor, the rotating speed of the indoor motor and the frequency of the compressor, controlling the frequency of the compressor to be at or above the lowest frequency during high-temperature sterilization, and correspondingly controls the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor to ensure that when high-temperature sterilization is carried out, the compressor can normally operate in indoor and outdoor high-temperature environments, the problems of driving step-out shutdown and overhigh condensation pressure caused by low-frequency operation of the compressor are avoided, and therefore, the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner are improved during high-temperature sterilization without increasing the 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 alternating current motor of the air conditioner to be started, controlling an indoor motor to run at a preset rotating speed and a compressor to run at a preset frequency, simultaneously controlling an air deflector to be at a set position, obtaining a temperature value of an indoor heat exchanger after the air deflector runs for a first preset time, adjusting one or more of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger, and in the adjusting process, adjusting the on or off state of the outdoor alternating current motor at the highest priority and adjusting the frequency of the compressor at the lowest priority.

According to the sterilization control method 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 a sterilization mode, and high-temperature sterilization is carried out in the sterilization mode, namely, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at the preset rotating speed and a compressor runs at the preset frequency, after the air conditioner runs for the first preset time, the temperature value of an indoor heat exchanger is obtained, one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor is 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 frequency of the compressor is controlled to be at the lowest frequency or above the lowest frequency during high-temperature sterilization, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are 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 adjusting one or more of an on or off state of the outdoor ac motor, a rotational speed of the indoor motor, and a 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 a second preset sterilization temperature value, controlling the outdoor alternating current motor to be closed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

In some embodiments, after controlling the outdoor ac motor to be turned off, the method further includes: if the temperature value of the indoor heat exchanger is reduced to be larger than or equal to a first preset sterilization temperature value and smaller than a second preset sterilization temperature value, controlling the outdoor alternating current motor to be continuously closed, and controlling the outdoor alternating current motor to be started again until the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value so as to correspondingly increase the temperature value of the indoor heat exchanger, and controlling the outdoor alternating current motor to be closed again until the temperature value of the indoor heat exchanger is larger than the second preset sterilization temperature value; the above process is repeatedly executed to alternately control the outdoor alternating current motor to be turned on or turned off.

In some embodiments, the adjusting one or more of an on or off state of the outdoor ac motor, a rotational speed of the indoor motor, and a 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 smaller than a first preset sterilization temperature value, controlling the outdoor alternating current motor to be kept started so as to correspondingly increase the temperature value of the indoor heat exchanger; after the outdoor alternating current motor is kept started for a second preset time, if the temperature value of the indoor heat exchanger is always smaller than the first preset sterilization temperature value, the indoor motor is controlled to gradually reduce the rotating speed according to a preset step length on the basis of the preset rotating speed so as to correspondingly increase the temperature value of the indoor heat exchanger.

In some embodiments, after controlling the indoor motor to gradually decrease the rotation speed according to a preset step based on the preset rotation speed, the method further includes: in the process of reducing the rotating speed of the indoor motor, 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, and the rotating speed of the indoor motor is greater than or equal to the minimum rotating speed threshold value of the indoor motor at the moment, the indoor motor is controlled to operate according to the rotating speed of the indoor motor at the moment.

In some embodiments, in reducing the rotation speed of the indoor motor, the method further includes: and if the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value and the rotating speed of the indoor motor is reduced to the lowest rotating speed threshold value of the indoor motor at the moment, controlling the compressor to increase the frequency successively according to preset frequency increment on the basis of preset frequency until the temperature value of the indoor heat exchanger is larger than or equal to the first preset sterilization temperature value and smaller than the second preset sterilization temperature value so as to correspondingly increase the temperature value of the indoor heat exchanger.

In some embodiments, in the sterilization mode, further comprising: and if the time accumulated by the indoor heat exchanger with the temperature value larger than the first preset sterilization temperature value reaches a third 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 alternating current motor of the air conditioner to be started, an indoor motor to run at a preset rotating speed and a compressor to run at a preset frequency when the current environment meets a preset condition, meanwhile, the air deflector is controlled to be in a set position, a temperature value of an indoor heat exchanger is obtained after the indoor heat exchanger runs for a first preset time, one or more of the on-off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, in addition, the priority for adjusting the on-off state of the outdoor alternating current motor is the highest, and the priority for adjusting the frequency of the compressor is the lowest.

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, high-temperature sterilization is carried out in the sterilization mode, namely, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at the preset rotating speed and a compressor runs at the preset frequency, after the air conditioner runs for the first preset time, the temperature value of an indoor heat exchanger is obtained, one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor is adjusted or not 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 frequency of the compressor is controlled to be at the lowest frequency or above the lowest frequency during high-temperature sterilization, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are 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 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 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 alternating current motor of the air conditioner is controlled to be started, the indoor motor runs at the preset rotating speed and the compressor runs at the preset frequency, the temperature value of the indoor heat exchanger is obtained after the air conditioner runs for the first preset time, one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor is 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, the frequency of the compressor is controlled to be at or above the lowest frequency during high-temperature sterilization, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are 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 of the on or off status of an outdoor AC motor and the 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, controlling the on or off state of an outdoor alternating current motor, the rotating speed of an indoor motor and the frequency of the compressor of the air conditioner according to the temperature value of the indoor heat exchanger and the priority order, ensuring that the compressor runs at a high frequency during high-temperature sterilization in summer, and avoiding the problems of driving out-of-step shutdown and overhigh condensation pressure caused by low-frequency running of the compressor, thereby improving the running reliability of the compressor and the high-temperature sterilization reliability of the air conditioner.

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 send 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 preset conditions, for example, the first temperature threshold T1 is 25 ℃, the second temperature threshold T2 is 24 ℃, when detecting that 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 conditions, 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 alternating current motor of the air conditioner to be started, controlling an indoor motor to run at a preset rotating speed and a compressor to run at a preset frequency, simultaneously controlling an air deflector to be at a set position, obtaining a temperature value of an indoor heat exchanger after the air deflector runs for a first preset time, adjusting one or more of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger, and in the adjusting process, adjusting the on or off state of the outdoor alternating current motor at the highest priority and adjusting the frequency of the compressor at the lowest priority.

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 on or off state of the outdoor AC motor, the rotating speed of the indoor motor and the frequency of the compressor are correspondingly controlled.

It can be understood that when the sterilization function is started, the outdoor alternating current motor is started or closed, and the temperature of the indoor heat exchanger is reduced or increased along with the temperature; 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 outdoor ac motor, such as a tap motor, has an unadjustable rotation speed and only has a fixed first gear rotation speed. 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.

Taking the case that the indoor motor is provided with three gears as an example, the process of correspondingly controlling the on or off state of the outdoor ac motor, the rotating speed of the indoor motor and the frequency of the compressor after the air conditioner enters the sterilization mode will be described.

After the air conditioner is controlled to enter the sterilization mode, the outdoor alternating current motor is controlled to be started, the indoor motor is controlled to run at a preset rotating speed, for example, the low windshield rotating speed r _ L is 800rpm, and the compressor runs at a preset frequency for a first preset time. Specifically, the preset frequency of the compressor is the lowest frequency of high-temperature sterilization in summer, for example, recorded as F _ low, and the preset frequency is greater than the minimum frequency of the air conditioner during normal heating, and when the compressor operates at the first preset frequency F _ low, the reliable operation of the compressor at a heavy load low frequency can be satisfied, and the minimum reliable operation frequency corresponding to the maximum condensing force specified by the compressor can be satisfied. Therefore, in the high-temperature sterilization process of the air conditioner, the preset frequency F _ low of the compressor is always controlled to be above the lowest frequency 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 in a set position, so that the air outlet direction of the air conditioner can be used for discharging air along the horizontal direction or discharging air 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 in the air flow position of a patio, so that the air deflector is controlled to guide air flow to blow to a ceiling, hot air blown out by an indoor fan is reduced, and 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.

In order to satisfy the problems of reliability of the compressor and prevention of step-out of driving, the operation frequency of the compressor is defined to be operated at the lowest frequency F _ low of the summer pasteurization, and initially remains unchanged, may be increased if necessary, but cannot be decreased.

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 on-off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the temperature value Tc of the indoor heat exchanger and the priority sequence, so that the rotating speed of the indoor motor and the frequency of the compressor can run at normal frequency or rotating speed, the problems of driving step-out shutdown and overhigh condensation pressure due to low-frequency running of the compressor are avoided, the temperature of the indoor heat exchanger is guaranteed to meet the sterilization temperature requirement, and meanwhile, 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 of the embodiment of the invention, 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 alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at the preset rotating speed and a compressor runs at the preset frequency, after the air conditioner runs for the first preset time, the temperature value of an indoor heat exchanger is obtained, one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor is 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 frequency of the compressor is controlled to be at or above the lowest frequency during high-temperature sterilization, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are 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 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 on/off state of the outdoor ac motor, the rotation speed of the indoor 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 an on or off state of the outdoor ac motor, a rotational speed of the indoor motor, and a frequency of the compressor based on the temperature value of the indoor heat exchanger includes: if the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value, controlling the outdoor alternating current motor to be kept started so as to correspondingly increase the temperature value of the indoor heat exchanger; after the outdoor alternating current motor is kept started for the second preset time, if the temperature value of the indoor heat exchanger is always smaller than the first preset sterilization temperature value, the indoor motor is controlled to gradually reduce the rotating speed according to the preset step length on the basis of the preset rotating speed so as to correspondingly increase the temperature value of the indoor heat exchanger.

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 ensured, at this time, the temperature value Tc of the indoor heat exchanger needs to be increased, so that the temperature value Tc of the indoor heat exchanger is between the 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 within a sterilization temperature range, at this time, one or more of the on or off state of the outdoor ac motor, the rotation speed of the indoor motor, and the frequency of the compressor needs to be sequentially adjusted according to the priority order of the on or off state of the outdoor ac motor, the rotation speed of the indoor motor, and the frequency of the compressor, since the priority of adjusting the on or off state of the outdoor ac motor is highest, when the temperature value Tc of the indoor heat exchanger is less than the first preset sterilization temperature value Tc1, the on or off state of the outdoor ac motor is adjusted first.

Specifically, when the temperature value Tc of the indoor heat exchanger is less than the first preset sterilization temperature value Tc1, the outdoor ac motor is controlled to be kept ON, for example, the outdoor ac motor is controlled to be in an ON state, so as to correspondingly increase the temperature value Tc of the indoor heat exchanger, and in the process of keeping the outdoor ac motor ON, the temperature value Tc of the indoor heat exchanger needs to be periodically obtained with a preset time as a period, for example, every 5s, the temperature value Tc of the indoor heat exchanger is obtained again, for example, after a plurality of 5s, the temperature value Tc of the indoor heat exchanger is 53 ℃, and has no rising trend, and the outdoor ac motor is kept ON for the second preset time, it is considered that the temperature value Tc of the indoor heat exchanger cannot be increased to be between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value 2, that is, the temperature is increased to the sterilization temperature range, at this time, according to the priority adjustment sequence, the rotating speed of the indoor motor needs to be adjusted, and when the rotating speed of the indoor motor is adjusted, the indoor motor is controlled to gradually reduce the rotating speed according to a preset step length on the basis of a preset rotating speed so as to correspondingly increase the temperature value Tc of the indoor heat exchanger. By comparing the temperature value Tc of the indoor heat exchanger with the first preset sterilization temperature value Tc1, when the temperature value Tc of the indoor heat exchanger is smaller than the first preset sterilization temperature value Tc1, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are adjusted according to the priority adjustment sequence, so that the temperature value Tc of the indoor heat exchanger is increased to enable the temperature value Tc of the indoor heat exchanger to rise to the sterilization temperature interval.

In some embodiments, after the controlling the indoor motor to gradually decrease the rotation speed according to the preset step length based on the preset rotation speed, the method further includes: in the process of reducing the rotating speed of the indoor motor, 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, and the rotating speed of the indoor motor is greater than or equal to the lowest rotating speed threshold value of the indoor motor at the moment, the indoor motor is controlled to operate according to the rotating speed of the indoor motor at the moment.

For example, in the process of reducing the rotation speed of the indoor motor, the indoor motor needs to be controlled to gradually reduce the rotation speed according to a preset step length based on a preset rotation speed threshold value to increase the temperature value Tc of the indoor heat exchanger, for example, the preset step length is, for example, denoted as Δ r, at this time, the indoor motor is controlled to gradually reduce the rotation speed of the indoor motor according to the preset step length Δ r based on the low windshield rotation speed r (0) -r _ L-800 rpm, that is, r (1) -r (0-800-100-700-600-100-700-600-r, and so on, the rotation speed of the indoor motor is gradually reduced according to r (n +1) -r (n) - Δ r. In the process of reducing the rotating speed of the indoor motor, the temperature Tc of the indoor heat exchanger needs to be obtained, if the temperature value Tc of the indoor heat exchanger is increased to be greater than or equal to a first preset sterilization temperature value Tc1 and smaller than a second preset sterilization temperature value Tc2, and the rotating speed of the indoor motor is greater than or equal to the minimum rotating speed threshold of the indoor motor at the moment, namely, the minimum reliable running rotating speed of the indoor motor, the rotating speed of the indoor motor is adjusted after the outdoor alternating current motor is controlled to be kept started, so that the outdoor alternating current motor and the indoor motor are jointly adjusted, the temperature value Tc of the indoor heat exchanger can be increased to a sterilization temperature interval, at the moment, the rotating speed of the indoor motor does not need to be continuously reduced, the indoor motor is controlled to run at the rotating speed at the moment, and the temperature value Tc of the indoor heat exchanger is maintained in the sterilization temperature interval. In other words, if the temperature value Tc of the indoor heat exchanger is always smaller than the first preset sterilization temperature value Tc1 and the outdoor ac motor is always kept on, the rotation speed of the indoor motor is controlled to decrease to increase the temperature value Tc of the indoor heat exchanger, i.e., r (n +1) ═ r (n) — Δ r, where r (0) ═ r _ L, and the minimum value of r (n +1) is the minimum rotation speed rmin of reliable operation, i.e., the minimum rotation speed threshold of the indoor motor.

In some embodiments, in reducing the rotation speed of the indoor motor, the method further includes: if the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value and the rotating speed of the indoor motor is reduced to the lowest rotating speed threshold value of the indoor motor at the moment, controlling the compressor to increase the frequency gradually according to the preset frequency increment on the basis of the preset 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 the second preset sterilization temperature value.

For example, in the process of reducing the rotation speed of the indoor motor, if the temperature value Tc of the indoor heat exchanger is always smaller than the first preset sterilization temperature value Tc1, and there is no obvious trend of rising, and the rotation speed of the indoor motor has been reduced to the minimum rotation speed threshold of the indoor motor at this time, for example, the rotation speed of the indoor motor has been reduced to r ═ 400rpm, which is the minimum reliable operation rotation speed of the indoor motor, it is considered that the temperature value Tc of the indoor heat exchanger cannot be increased to the sterilization temperature interval by controlling the outdoor ac motor to start and reduce the rotation speed of the indoor motor, and at this time, according to the priority adjustment sequence, the frequency of the compressor needs to be adjusted, so that the temperature value Tc of the indoor heat exchanger rises to the sterilization temperature interval.

Further, the outdoor ac motor is kept turned on, and the rotation speed of the indoor motor is reduced to the minimum rotation speed threshold of the indoor motor, at this time, the temperature value Tc of the indoor heat exchanger is still less than the first preset sterilization temperature value Tc1, the compressor is controlled to increase the frequency successively according to a preset frequency increment based on the preset frequency, for example, the compressor is controlled to increase the frequency successively according to the preset frequency increment based on F (0) ═ F _ low, that is, F (1) ═ F (0) +5 ═ 35+5 ═ 40Hz, and the compressor is controlled to increase the temperature value Tc of the indoor heat exchanger successively according to F (n +1) ═ F (n) () Δ F, so as to increase the temperature value Tc of the indoor heat exchanger until the temperature value Tc of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc 2. 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 smaller than the first preset sterilization temperature value Tc1, the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the priority adjusting sequence, so that the temperature value Tc of the indoor heat exchanger is in a sterilization temperature range, the sterilization effect of the air conditioner is ensured, the operating frequency of the compressor is considered, the compressor frequency is not too low to cause shutdown, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved. In other words, if the outdoor ac motor is kept on and the rotation speed of the indoor motor has decreased to the minimum rotation speed threshold rmin, and at this time, the temperature value Tc of the indoor heat exchanger is still less than the first preset sterilization temperature value Tc1, the frequency of the compressor is controlled to increase, for example, the frequency of the compressor is increased successively according to F (n +1) ═ F (n) + Δ F, so as to increase the temperature value Tc of the indoor heat exchanger until the temperature value Tc of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc2, that is, Tc1 is less than Tc < Tc2, so as to maintain the temperature value Tc of the indoor heat exchanger within the sterilization temperature interval. Wherein F (0) ═ F _ low.

In some embodiments, adjusting one or more of an on or off state of the outdoor ac motor, a rotational speed of the indoor motor, and a frequency of the compressor based on the temperature value of the indoor heat exchanger includes: and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value, controlling the outdoor alternating current motor to be closed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

Specifically, the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature threshold value Tc2, for example, Tc is 61 ℃ > 60 ℃, then the temperature value Tc of the indoor heat exchanger is considered to be high, at this time, the outdoor ac motor is controlled to be turned OFF, for example, the outdoor ac motor is controlled to be in an OFF state, so that the condensation temperature is rapidly reduced, at this time, the temperature value Tc of the indoor heat exchanger must be reduced to be smaller than the first preset sterilization temperature value Tc1, thereby avoiding that the temperature value Tc of the indoor heat exchanger is always greater than the second preset sterilization temperature threshold value Tc2, and improving the control of the temperature value Tc of the indoor heat exchanger.

In some embodiments, after controlling the outdoor ac motor to turn off, the method further includes: if the temperature value of the indoor heat exchanger is reduced to be larger than or equal to a first preset sterilization temperature value and smaller than a second preset sterilization temperature value, controlling the outdoor alternating current motor to be continuously turned off, and controlling the outdoor alternating 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 so as to correspondingly increase the temperature value of the indoor heat exchanger, and controlling the outdoor alternating current motor to be turned off again until the temperature value of the indoor heat exchanger is larger than the second preset sterilization temperature value; the above processes are repeatedly executed to alternately control the outdoor alternating current motor to be turned on or turned off.

For example, after the outdoor ac motor is controlled to be turned off, 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 reduced 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, when the temperature value Tc of the indoor heat exchanger is 59 ℃, the outdoor ac motor is controlled to be continuously turned off until the temperature value Tc of the indoor heat exchanger is reduced to be less than the first preset sterilization temperature value Tc1, the outdoor ac motor is controlled to be turned on again to increase the temperature value Tc of the indoor heat exchanger, the outdoor ac motor is controlled to be turned off until the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature value Tc2, the above process is repeatedly performed, the outdoor ac motor is alternately controlled to be turned on or off, so that the temperature value Tc of the indoor heat exchanger is maintained between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, 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.

Specifically, as shown in fig. 3, it is a schematic diagram of a corresponding relationship between an on or off state of the outdoor ac motor and a temperature value of the indoor heat exchanger according to an embodiment of the present invention. As can be seen from fig. 3, when the outdoor ac motor is turned OFF, for example, in an OFF state, the condensing temperature is certainly lower than the first predetermined sterilization temperature value Tc1, but when the outdoor ac motor is turned ON, for example, in an ON state, the temperature value Tc of the indoor heat exchanger is increased rapidly, so as to reach the sterilization temperature range until the temperature value Tc of the indoor heat exchanger is greater than the second predetermined sterilization temperature value Tc2, for example, Tc > Tc 2. It will be appreciated that the outdoor ac motor is controlled to switch back and forth between the OFF state and the ON state, except that the period of time during which the outdoor ac motor is in the ON state and the OFF state is different. Therefore, when 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, the outdoor ac motor is in the ON state or the OFF state, depending ON the state of the outdoor ac motor in the previous detection cycle, for example, the outdoor ac motor is in the ON state in the previous detection cycle, the outdoor ac motor is kept in the ON state in the current cycle, and the outdoor ac motor is kept in the OFF state in the previous detection cycle.

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 a third 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, that is, the time that Tc is greater than or equal to Tc1 is accumulated, when the accumulated time reaches a third 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 on or off state of the outdoor alternating current motor, the rotation speed of the indoor motor and the detection period T2 of the frequency of the compressor are 5s, the third preset time T3 is 40min, the set temperature Ts is 50 ℃, the preset frequency F _ low of the compressor is 35Hz, the frequency increment Δ F is 5Hz, the preset rotation speed r _ L of the indoor motor is 800rpm, the preset step Δ r is 100rpm, and the minimum rotation speed threshold rmin of the indoor motor is 400 rpm.

The first embodiment is as follows: the air conditioner receives a sterilization instruction, detects that the indoor environment temperature Tin is 27 ℃ and the outdoor environment temperature Tout is 42 ℃, determines that the indoor environment temperature Tin is greater than a first temperature threshold T1 and the outdoor environment temperature Tout is greater than a second temperature threshold T2, determines that the current environment meets a preset condition, for example, the current environment is in a summer working condition, controls the air conditioner to operate a sterilization mode, and sets a set temperature Ts to be 50 ℃. In the sterilization mode, the initial rotating speed of the indoor motor runs at the low wind gear rotating speed r _ L which is 800rpm, and the air deflector is positioned at the air flow position of the patio. The outdoor alternating current motor is initially in an ON state, and the initial frequency F _ low of the compressor is 35 Hz. After the air conditioner is heated for a first preset time, for example, 2min, the temperature value Tc of the indoor heat exchanger is 58 ℃, and in the high-temperature sterilization temperature interval, the outdoor alternating-current motor is kept in an ON state, the rotating speed of the indoor motor and the frequency of the compressor are kept unchanged. After a plurality of the indoor heat exchangers are carried out for 5s, the temperature value Tc of the indoor heat exchanger is greater than 60 ℃ for the first time, and then the outdoor alternating current motor is controlled to be in an OFF state; after a plurality of cycles, if the temperature value Tc of the indoor heat exchanger is between 57 ℃ and 60 ℃, keeping the outdoor alternating current motor in an OFF state, and if Tc is less than 56 ℃, keeping the outdoor alternating current motor in an ON state. When the temperature value Tc of the indoor heat exchanger is more than 60 ℃ again, the outdoor alternating current motor is controlled to be in an OFF state. And whether the temperature value Tc of the indoor heat exchanger is in an ON state or an OFF state when the temperature value Tc is between 57 ℃ and 60 ℃ depends ON the state of the outdoor alternating current motor in the last detection period, if the outdoor alternating current motor in the last period is ON, the period is kept in the ON state, and if the outdoor alternating current motor in the last period is OFF, the period is kept in the OFF state. 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.

Example two: the air conditioner receives a sterilization instruction, detects that the indoor environment temperature Tin is 26 ℃ and the outdoor environment temperature Tout is 30 ℃, determines that the indoor environment temperature Tin is greater than a first temperature threshold value T1 and the outdoor environment temperature Tout is greater than a second temperature threshold value T2, determines that the current environment meets a preset condition, for example, the current environment is in a summer working condition, controls the air conditioner to operate a sterilization mode, and sets the set temperature Ts to be 50 ℃. In the sterilization mode, the indoor motor runs at a low wind gear rotating speed r _ L of 800rpm, and the air deflector is positioned at the position of the air flow of the patio. The outdoor alternating current motor is initially in an ON state, and the initial frequency F _ low of the compressor is 35 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 52 ℃, and the outdoor alternating current motor is kept in an ON state, the rotating speed of the indoor motor and the frequency of the compressor are kept unchanged. After a plurality of detection periods (each detection period is 5s), the temperature value Tc of the indoor heat exchanger is always less than 56 ℃ and has no tendency to rise, the rotation speed of the indoor motor is controlled to be reduced, for example, r (1) -r (0) -100-800-700 rpm is set to increase the temperature value Tc of the indoor heat exchanger, after a plurality of detection periods, Tc-58 ℃ is set to satisfy the high-temperature sterilization temperature interval, and at this time, the rotation speed of the indoor motor is r (n +1) -500 rpm. In the subsequent detection period, the temperature value Tc of the indoor heat exchanger is always maintained between 57 ℃ and 60 ℃, and the rotating speed r of the indoor motor is kept unchanged at 500 rpm. And when the accumulated time of the indoor heat exchanger coil temperature T c being more than 56 ℃ exceeds 40min, the high-temperature sterilization mode is exited.

Example three: the air conditioner receives a sterilization instruction, detects that the indoor environment temperature Tin is 26 ℃ and the outdoor environment temperature Tout is 25 ℃, determines that the indoor environment temperature Tin is greater than a first temperature threshold value T1 and the outdoor environment temperature Tout is greater than a second temperature threshold value T2, determines that the current environment meets a preset condition, for example, the current environment is in a summer working condition, controls the air conditioner to operate a sterilization mode, and sets the set temperature Ts to be 50 ℃. In the sterilization mode, the indoor motor runs at a low wind gear rotating speed r _ L of 800rpm, and the air deflector is positioned at the position of the air flow of the patio. The outdoor AC motor is initially in the ON state and the compressor has an initial frequency of 35 Hz. After the air conditioner is heated for a first preset time, for example, 2min, the temperature value Tc of the indoor heat exchanger is 50 ℃, and the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are kept unchanged. After a plurality of detection cycles (each detection cycle is 5s), the temperature value Tc of the indoor heat exchanger is always less than 56 ℃ and has no tendency of rising, and then the rotation speed of the indoor motor is controlled to be reduced, for example, r (1) -r (0) -100-800-700 rpm, the temperature value Tc of the indoor heat exchanger is used, after a plurality of detection cycles, Tc-53-56 ℃, at this time, the rotation speed of the indoor motor is r (n +1) -400 rpm, which is the lowest reliable operation rotation speed of the indoor motor. And controlling the frequency of the compressor to rise in a subsequent new detection period, namely F (1) + F (0) + 5) + 35+5 to 40Hz, and adjusting the frequency once per period until the temperature value Tc of the indoor heat exchanger is controlled to be between 57 and 60 ℃. 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 of the embodiment of the invention, 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 alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at the preset rotating speed and a compressor runs at the preset frequency, after the air conditioner runs for the first preset time, the temperature value of an indoor heat exchanger is obtained, one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor is 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 frequency of the compressor is controlled to be at the lowest frequency or above the lowest frequency during high-temperature sterilization, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are 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.

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 20 is configured to judge whether the current environment meets a preset condition after receiving the sterilization instruction, where the preset condition includes: 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 21 is configured to, when the current environment meets a preset condition, control an outdoor ac motor of the air conditioner to be turned on, control an indoor motor to operate at a preset rotation speed and at a preset frequency, control the air deflector to be at a set position, and obtain a temperature value of the indoor heat exchanger after operating for a first preset time, and adjust one or more of an on or off state of the outdoor ac motor, a rotation speed of the indoor motor, and a frequency of the compressor according to the temperature value of the indoor heat exchanger, and in an adjustment process, a priority for adjusting the on or off state of the outdoor ac motor is highest, and a priority for adjusting the frequency of the compressor is lowest.

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 alternating current motor of the air conditioner is controlled to be started, the indoor motor runs at the preset rotating speed and the compressor runs at the preset frequency, and after the air conditioner runs for the first preset time, the temperature value of the indoor heat exchanger is obtained, and one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor is 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 frequency of the compressor is controlled to be at or above the lowest frequency during high-temperature sterilization, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are 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 a first preset sterilization temperature value, control the outdoor ac motor to be kept on, so as to correspondingly increase the temperature value of the indoor heat exchanger; after the outdoor alternating current motor is kept started for the second preset time, when the temperature value of the indoor heat exchanger is always smaller than the first preset sterilization temperature value, the indoor motor is controlled to gradually reduce the rotating speed according to the preset step length on the basis of the preset rotating speed so as to correspondingly increase the temperature value of the indoor heat exchanger.

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 ensured, at this time, the temperature value Tc of the indoor heat exchanger needs to be increased, so that the temperature value Tc of the indoor heat exchanger is between the 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 within a sterilization temperature range, at this time, one or more of the on or off state of the outdoor ac motor, the rotation speed of the indoor motor, and the frequency of the compressor needs to be sequentially adjusted according to the priority order of the on or off state of the outdoor ac motor, the rotation speed of the indoor motor, and the frequency of the compressor, since the priority of adjusting the on or off state of the outdoor ac motor is highest, when the temperature value Tc of the indoor heat exchanger is less than the first preset sterilization temperature value Tc1, the on or off state of the outdoor ac motor is adjusted first.

Specifically, when the temperature value Tc of the indoor heat exchanger is less than the first preset sterilization temperature value Tc1, the outdoor ac motor is controlled to be kept ON, for example, the outdoor ac motor is controlled to be in an ON state, so as to correspondingly increase the temperature value Tc of the indoor heat exchanger, and in the process of keeping the outdoor ac motor ON, the temperature value Tc of the indoor heat exchanger needs to be periodically obtained with a preset time as a period, for example, every 5s, the temperature value Tc of the indoor heat exchanger is obtained again, for example, after a plurality of 5s, the temperature value Tc of the indoor heat exchanger is 53 ℃, and has no rising trend, and the outdoor ac motor is kept ON for the second preset time, it is considered that the temperature value Tc of the indoor heat exchanger cannot be increased to be between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value 2, that is, the temperature is increased to the sterilization temperature range, at this time, according to the priority adjustment sequence, the rotating speed of the indoor motor needs to be adjusted, and when the rotating speed of the indoor motor is adjusted, the indoor motor is controlled to gradually reduce the rotating speed according to a preset step length on the basis of a preset rotating speed so as to correspondingly increase the temperature value Tc of the indoor heat exchanger. By comparing the temperature value Tc of the indoor heat exchanger with the first preset sterilization temperature value Tc1, when the temperature value Tc of the indoor heat exchanger is smaller than the first preset sterilization temperature value Tc1, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are adjusted according to the priority adjustment sequence, so that the temperature value Tc of the indoor heat exchanger is increased to enable the temperature value Tc of the indoor heat exchanger to rise to the sterilization temperature interval.

In some embodiments, the control module 21 is further configured to, in the process of reducing the rotation speed of the indoor motor, 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 smaller than a second preset sterilization temperature value, and the rotation speed of the indoor motor is greater than or equal to a minimum rotation speed threshold of the indoor motor at this time, control the indoor motor to operate according to the rotation speed of the indoor motor at this time.

In some embodiments, the control module 21 is further configured to, when the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value and the rotation speed of the indoor motor is reduced to the minimum rotation speed threshold of the indoor motor at this time, control the compressor to increase the frequency one by one based on the preset frequency according to the preset frequency increment 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.

In some embodiments, the control module 21 is specifically configured to, when the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value, control the outdoor ac motor to be turned off to correspondingly lower the temperature value 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 reduced 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 ac motor to be continuously turned off, until the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value, control the outdoor ac motor to be turned on again to correspondingly increase the temperature value of the indoor heat exchanger, and until the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value, control the outdoor ac motor to be turned off again; the above process is repeatedly executed to alternately control the outdoor alternating current motor to be turned on or turned off.

For example, after the outdoor ac motor is controlled to be turned off, 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 reduced 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, when the temperature value Tc of the indoor heat exchanger is 59 ℃, the outdoor ac motor is controlled to be continuously turned off until the temperature value Tc of the indoor heat exchanger is reduced to be less than the first preset sterilization temperature value Tc1, the outdoor ac motor is controlled to be turned on again to increase the temperature value Tc of the indoor heat exchanger, the outdoor ac motor is controlled to be turned off until the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature value Tc2, the above process is repeatedly performed, the outdoor ac motor is alternately controlled to be turned on or off, so that the temperature value Tc of the indoor heat exchanger is maintained between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, 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 some embodiments, in the sterilization mode, further comprising: and when the time accumulated by detecting that the temperature value of the indoor heat exchanger is greater than the first preset sterilization temperature value reaches a third 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, that is, the time that Tc is greater than or equal to Tc1 is accumulated, when the accumulated time reaches a third 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.

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 alternating current motor of the air conditioner is controlled to be started, the indoor motor runs at the preset rotating speed and the compressor runs at the preset frequency, and after the air conditioner runs for the first preset time, the temperature value of the indoor heat exchanger is obtained, and one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor is 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 frequency of the compressor is controlled to be at or above the lowest frequency during high-temperature sterilization, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are 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 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 alternating current motor of the air conditioner is controlled to be started, the indoor motor runs at the preset rotating speed and the compressor runs at the preset frequency, the temperature value of the indoor heat exchanger is obtained after the air conditioner runs for the first preset time, one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor is 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, the frequency of the compressor is controlled to be at or above the lowest frequency during high-temperature sterilization, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are correspondingly controlled, and the compressor can normally run in the indoor and outdoor high-, 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.