1. A control method of an air source heat pump system comprises a heat pump unit (1), an electric auxiliary heating mechanism (2) and a water tank (3), and is characterized by comprising the following steps:

determining a control demand;

controlling the air source heat pump system to enter one of an energy-saving mode, an intelligent mode and a quick heating mode according to the control requirement;

the energy saving mode includes: presetting limit water temperature T_set，T_setIs not higher than the highest heating water temperature T which can be realized by the heat pump unit (1)_max(ii) a At ambient temperature T_eIs not lower than the lowest environment temperature T for the normal work of the heat pump unit (1)_e-minAnd the water inlet temperature T of the water tank (3) is lower than T_setIn the process, water in the water tank (3) is heated only by the heat pump unit (1);

the intelligent mode includes: presetting a first limit ring temperature T_e1-setAnd a second limit ring temperature T_e2-set，T_e1-setAnd T_e2-setAre all higher than T_e-minAnd T is_e2-setNot less than T_e1-set(ii) a At T_e-min≤T_e≤T_e1-setAnd T is less than T_maxMeanwhile, water in the water tank (3) is heated by the heat pump unit (1) and the electric auxiliary heating mechanism (2); at T_e＞T_e2-setOr fail to measure T_eAnd T < T_maxIn the process, water in the water tank (3) is heated only by the heat pump unit (1);

the fast heating mode includes: at T_e-min≤T_eAnd T is less than T_maxAnd meanwhile, the water in the water tank (3) is heated by the heat pump unit (1) and the electric auxiliary heating mechanism (2).

2. The control method of the air source heat pump system according to claim 1, characterized in that for any one of the energy saving mode, the smart mode and the fast heating mode, at T_e＜T_e-minIn time, the water in the water tank (3) is heated only by the electric auxiliary heating mechanism (2).

3. The control method of an air source heat pump system according to claim 1, characterized in that for any one of the energy saving mode, the smart mode and the fast heating mode, the water in the water tank (3) is heated to T not lower than T_maxThen, ifT is still less than the target heating temperature T_targetAnd simultaneously heating the water in the water tank (3) by the heat pump unit (1) and the electric auxiliary heating mechanism (2).

4. The method for controlling an air source heat pump system according to claim 3, wherein the limit water temperature T is set to be lower than the threshold water temperature T in the energy saving mode_setRatio T_maxThe water in the water tank (3) is heated to a temperature T not lower than T at a temperature of 2-3 DEG C_setThen the electric auxiliary heating mechanism (2) is started.

5. The control method of the air source heat pump system according to claim 1, characterized in that for any one of the energy-saving mode, the intelligent mode and the quick heating mode, the electric auxiliary heating mechanism (2) is turned on for heating operation when the air source heat pump system performs defrosting or anti-freezing protection.

6. The method as claimed in claim 1, wherein in the smart mode, the first threshold temperature T is set to be equal to or lower than the threshold temperature T_e1-setThe temperature is set to-5-12 ℃.

7. The method as claimed in claim 1, wherein in the smart mode, the second threshold temperature T is set to be equal to or lower than the threshold temperature T_e2-setRing temperature T higher than the first limit_e1-setThe height is 2-3 ℃.

8. An air source heat pump system, characterized in that the control method of the air source heat pump system according to any one of claims 1-7 is used.

Background

The traditional air source heat pump system mainly adopts a heat pump unit as a heat supply source to heat water in a water tank and provide hot water for users. In order to heat more quickly, an electric auxiliary heating mechanism is arranged in some existing air source heat pump systems, but for the air source heat pump systems, the cooperation between a heat pump unit and the electric auxiliary heating mechanism is often single, different requirements such as energy conservation or intelligent operation are difficult to meet, and the overall applicability of the system is poor.

Accordingly, a control method of an air source heat pump system and an air source heat pump system are needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a control method of an air source heat pump system and the air source heat pump system, so that the matching of a heat pump unit and an electric auxiliary heating mechanism is more diversified, different requirements such as energy conservation or intelligent operation are met, and the applicability of the air source heat pump system is improved.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a control method of an air source heat pump system, wherein the air source heat pump system comprises a heat pump unit, an electric auxiliary heating mechanism and a water tank, and the control method of the air source heat pump system comprises the following steps:

determining a control demand;

controlling the air source heat pump system to enter one of an energy-saving mode, an intelligent mode and a quick heating mode according to the control requirement;

the energy saving mode includes: presetting limit water temperature T_set，T_setNot higher than the highest heating water temperature T which can be realized by the heat pump unit_max(ii) a At ambient temperature T_eNot lower than the lowest environment temperature T for the normal work of the heat pump unit_e-minAnd the water inlet temperature T of the water tank is lower than T_setIn the process, only the heat pump unit is used for heating water in the water tank;

the intelligent mode includes: presetting a first limit ring temperature T_e1-setAnd a second limit ring temperature T_e2-set，T_e1-setAnd T_e2-setAre all higher than T_e-minAnd T is_e2-setNot less than T_e1-set(ii) a At T_e-min≤T_e≤T_e1-setAnd T is less than T_maxWhile, at the same timeThe water in the water tank is heated by the heat pump unit and the electric auxiliary heating mechanism; at T_e＞T_e2-setOr fail to measure T_eAnd T < T_maxIn the process, only the heat pump unit is used for heating water in the water tank;

the fast heating mode includes: at T_e-min≤T_eAnd T is less than T_maxAnd meanwhile, the water in the water tank is heated by the heat pump unit and the electric auxiliary heating mechanism.

Optionally, for any one of the energy saving mode, the smart mode and the fast heating mode, at T_e＜T_e-minIn time, the water in the water tank is heated only by the electric auxiliary heating mechanism.

Optionally, for any one of the energy saving mode, the smart mode and the fast heating mode, the water in the water tank is heated to T not lower than T_maxThen, if T is still less than the target heating temperature T_targetAnd simultaneously heating the water in the water tank by the heat pump unit and the electric auxiliary heating mechanism.

Optionally, in the energy saving mode, the limit water temperature T_setRatio T_maxThe water in the water tank is heated to a temperature T of not less than T at a temperature of 2-3 DEG C_setAnd then the electric auxiliary heating mechanism is started.

Optionally, for any one of the energy-saving mode, the intelligent mode and the quick heating mode, when the air source heat pump system performs defrosting or anti-freezing protection, the electric auxiliary heating mechanism is turned on to perform heating operation.

Optionally, in the smart mode, the first limit loop temperature T_e1-setThe temperature is set to-5-12 ℃.

Optionally, in the smart mode, a second limit loop temperature T_e2-setRing temperature T higher than the first limit_e1-setThe height is 2-3 ℃.

The invention also provides an air source heat pump system, which uses the control method of the air source heat pump system.

The invention has the beneficial effects that:

the invention provides a control method of an air source heat pump system and the air source heat pump system, which can be used for a user to select an energy-saving mode, an intelligent mode or a quick heating mode. After selecting the energy saving mode, at the ambient temperature T_eUnder the condition that the normal working condition of the heat pump unit is met and the water inlet temperature T of the water tank does not exceed the heating upper limit of the heat pump unit, an electric auxiliary heating mechanism does not need to be started, so that the energy consumption can be effectively saved; after the intelligent mode is selected, the air source heat pump system can be operated according to the ambient temperature T_e、T_eThe measurement and the automatic adjustment of a plurality of parameters such as the water inlet temperature T of the water tank are very intelligent, so that users can save more worry and labor, and the use comfort of the users is improved; after the quick heating mode is selected, the user can obtain hot water very quickly.

On the whole, the control method and the air source heat pump system can meet more diversified requirements and improve the overall applicability of the system.

Drawings

Fig. 1 is a schematic overall flow chart of a control method of an air source heat pump system according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of an energy saving mode in a control method of an air source heat pump system according to an embodiment of the present invention;

fig. 3 is a schematic flowchart of an intelligent mode in a control method of an air source heat pump system according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of a medium-speed thermal mode in a control method of an air source heat pump system according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an air source heat pump system according to an embodiment of the present invention.

In the figure:

1. a heat pump unit; 11. a condenser; 12. a compressor; 13. an evaporator; 14. a throttling device;

2. an electrically assisted heating mechanism;

3. a water tank; 31. and a water inlet temperature sensor.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 5, the present embodiment provides a control method of an air source heat pump system and an air source heat pump system. The air source heat pump system comprises a heat pump unit 1, an electric auxiliary heating mechanism 2 and a water tank 3.

Next, a control method of the air source heat pump system will be described.

As shown in fig. 1, the control method of the air source heat pump system includes: a control demand is determined. In this embodiment, the control demand includes an energy saving demand, an intelligent operation demand, and a rapid heating demand. And controlling the air source heat pump system to enter one of an energy-saving mode, an intelligent mode and a quick heating mode according to the control requirement.

The three operating modes described above are described below with reference to fig. 1-4.

And when an energy-saving requirement exists, controlling the air source heat pump system to enter an energy-saving mode. Specifically, the energy saving mode includes: presetting limit water temperature T_set，T_setNot higher than the maximum heating water temperature T which can be realized by the heat pump unit 1_max(ii) a At ambient temperature T_eNot lower than the lowest ambient temperature T for normal operation of the heat pump unit 1_e-minAnd the water inlet temperature T of the water tank 3 is lower than T_setIn the meantime, the water in the water tank 3 is heated only by the heat pump unit 1. It will be appreciated that the ambient temperature T_eAnd the inlet water temperature T of the water tank 3 should be collected in advance or in real time.

According to the above arrangement, after the user selects the energy-saving mode, the temperature is T at the environment temperature_eAnd the water inlet temperature T of the water tank 3 meet the conditions, the electric auxiliary heating mechanism 2 does not need to be started, and the energy consumption can be effectively saved.

Further, at T_e＜T_e-minDue to the ambient temperature T_eThe heat pump unit 1 is difficult to work normally due to too low temperature, so that the water in the water tank 3 is heated only by the electric auxiliary heating mechanism 2. In this example, T_e-minIs-7 ℃.

The water in the water tank 3 is heated to T not lower than T_maxThen, if T is still less than the target heating temperature T_targetAnd then, the electric auxiliary heating mechanism 2 is started, and simultaneously, the water in the water tank 3 is heated through the heat pump unit 1 and the electric auxiliary heating mechanism 2.

Preferably, in the energy saving mode, the limit water temperature T_setRatio T_maxThe temperature is lowered by 2-3 ℃ to leave a temperature adjusting space. When the water in the water tank 3 is heated to T not lower than T_setWhen the heating is started, the electric auxiliary heating mechanism 2 is started. In fact, the closer the inlet water temperature T of the tank 3 is to T_maxThe lower the heating efficiency of the heat pump unit 1 is, the lower the heat pump unit is, so that T is used_setSlightly below T_maxAnd the low energy consumption and the high heating efficiency are both favorably considered.

In this embodiment, the maximum heating water temperature T that the heat pump unit 1 can realize_maxAt 65 ℃ T_setThe temperature is set to 63 ℃, namely the electric auxiliary heating mechanism 2 is started when the temperature T is more than or equal to 63 ℃. T is_targetThe value range is 10-75 ℃, and 60 ℃ is preferred.

And when an intelligent operation demand exists, controlling the air source heat pump system to enter an intelligent mode. Specifically, the smart mode includes: presetting a first limit ring temperature T_e1-setAnd a second limit ring temperature T_e2-set，T_e1-setAnd T_e2-setAre all higher than T_e-minAnd T is_e2-setNot less than T_e1-set(ii) a At T_e-min≤T_e≤T_e1-setAnd T is less than T_maxMeanwhile, water in the water tank 3 is heated by the heat pump unit 1 and the electric auxiliary heating mechanism 2; at T_e＞T_e2-setOr fail to measure T_eAnd T < T_maxIn the meantime, the water in the water tank 3 is heated only by the heat pump unit 1.

In this embodiment, an ambient temperature sensor is provided in the air source heat pump system to measure the ambient temperature T_eWhen the ambient temperature sensor fails, T cannot be measured_e。

According to the arrangement, after the user selects the intelligent mode, the system can be operated according to the ambient temperature T_e、T_eThe measurement and the water inlet temperature T of the water tank 3 and other parameters are automatically adjusted, the intelligent water tank is very intelligent, a user can save more worry and labor, and the use comfort of the user is improved.

Optionally, a first limit loop temperature T in the intelligent mode_e1-setThe temperature is set to-5-12 ℃. In this example, T_e1-setPreferably 10 ℃ when the ambient temperature T is_eWhen the temperature is less than or equal to 10 ℃, the electric auxiliary heating mechanism 2 is startedThe water in the water tank 3 is heated by the heat pump unit 1 and the electric auxiliary heating mechanism 2.

Optionally, a second limit loop temperature T in the smart mode_e2-setRing temperature T higher than first limit_e1-setThe height is 2-3 ℃. For example, if T_e1-setSet to 10 ℃, T can be_e2-setSet to 12 ℃ and further at an ambient temperature T_eAt a temperature of not less than 12 ℃ or at which T cannot be measured_eThe electric auxiliary heating means 2 is switched off and the water in the water tank 3 is heated only by the heat pump assembly. During the actual operation of the system, the temperature T is caused by the environment_eThere will be some fluctuation due to the influence of external factors such as wind, so if T is directly related to_e2-setIs set to be AND_e1-setAnd if the voltage is equal, the electric auxiliary heating mechanism 2 may be turned on or off frequently, which is not favorable for the stable operation of the system. Thus, in making T_e2-setSlightly higher than T_e1-setThen, the problem can be effectively avoided.

Further, for the smart mode, at T_e＜T_e-minAt this time, the water in the water tank 3 is also heated only by the electric auxiliary heating mechanism 2.

In the smart mode, the water in the water tank 3 is heated to T not lower than T_maxThen, if T is still less than the target heating temperature T_targetThe electric auxiliary heating mechanism 2 is still kept on, and the water in the water tank 3 is continuously heated by the heat pump unit 1 and the electric auxiliary heating mechanism 2 until T reaches T_target. When T reaches T_targetThen, the heat pump unit 1 and the electric auxiliary heating mechanism 2 are stopped.

And when a rapid heating demand exists, controlling the air source heat pump system to enter a rapid heating mode. Specifically, the fast heating mode includes: at T_e-min≤T_eAnd T is less than T_maxDuring the heating, the water in the water tank 3 is heated by the heat pump unit 1 and the electric auxiliary heating mechanism 2.

According to the arrangement, after the user selects the quick heating mode, hot water can be obtained very quickly and conveniently.

Further, in the fast heating mode, at T, as in the energy saving mode and the smart mode_e＜T_e-minIn this case, the water in the water tank 3 is heated only by the electric auxiliary heating means 2.

In the quick heating mode, the water in the water tank 3 is heated to T not less than T_maxThen, if T is still less than the target heating temperature T_targetThe water in the water tank 3 is still continuously heated by the heat pump unit 1 and the electric auxiliary heating mechanism 2 until T reaches T_target. This setting is similar to the smart mode and will not be described further herein.

In other aspects, in this embodiment, no matter in the energy saving mode, the intelligent mode or the fast heating mode, in order to ensure the heat pump unit 1 to operate effectively, the ambient temperature T is set_eSlightly higher than T_e-minThe compressor 12 of the heat pump unit 1 is turned on. For example, at T_e-minAt-7 deg.C, it is selected from T_eThe compressor 12 is started at a temperature of not less than-5 ℃.

Except for the work of heating water, no matter in an energy-saving mode, an intelligent mode or a quick heating mode, if the air source heat pump system performs defrosting or anti-freezing protection, the electric auxiliary heating mechanism 2 can be started to perform heating work.

Next, an air source heat pump system will be described. In this embodiment, the air source heat pump system may enter an energy saving mode, an intelligent mode, or a fast heating mode by using the control method of the air source heat pump system, so as to meet various requirements, and the applicability is wider.

Structurally, as shown in fig. 5, the air-source heat pump system includes a heat pump unit 1, an electric auxiliary heating mechanism 2, and a water tank 3. The heat pump unit 1 and the electric auxiliary heating mechanism 2 are both connected with the water tank 3 to heat water in the water tank 3 and provide hot water for users. The arrows in the figure indicate the refrigerant flow direction.

Specifically, the heat pump unit 1 includes a condenser 11, a compressor 12, an evaporator 13, a throttling device 14, and the like, which can convert low-level heat energy of air into usable high-level heat energy to heat water in the water tank 3. Since the structure of the heat pump unit 1 is the prior art, it is not described herein in detail.

Further, an ambient temperature sensor is also arranged in the air source heat pump system to detect the ambient temperature T_e(ii) a At the same time, there is also a feed water temperature sensor 31 connected to the water tank 3 to measure the water tank 3The water inlet temperature T is more convenient to use.

Optionally, a wire controller is further arranged in the air source heat pump system, and the wire controller is electrically connected with the heat pump unit 1 and the electric auxiliary heating mechanism 2 respectively to control the operation of the heat pump unit 1 and the electric auxiliary heating mechanism 2, so as to realize switching among an energy-saving mode, an intelligent mode and a quick heating mode.

In this embodiment, an automatic icon and an AI icon are further provided on the line controller, so that a user can know in which mode the air source heat pump system is currently located. Specifically, when the auto icon lights up, it indicates that the air source heat pump system has entered an energy saving mode; when the AI icon is on, the intelligent mode of the air source heat pump system is indicated; when both the auto icon and the AI icon are lit, it is indicated that the air-source heat pump system has entered a rapid heating mode.

In summary, the present embodiment provides a control method of an air source heat pump system and an air source heat pump system, which can enable the air source heat pump system to enter an energy saving mode, so as to effectively save energy consumption of the system; the air source heat pump system can also enter an intelligent mode, so that a user is more worry-saving and labor-saving, and the use comfort of the user is improved; the air source heat pump system can also be put into a quick heating mode, so that a user can obtain hot water more quickly.

On the whole, the control method of the air source heat pump system and the air source heat pump system can meet more diversified requirements and have wider applicability.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.