CN118347174A - Heat pump system, control method, control device, air conditioner and storage medium - Google Patents

Abstract

The application discloses a heat pump system, a control method, a control device, an air conditioner and a computer readable storage medium, wherein the heat pump system comprises a compressor, indoor heat exchange equipment, a four-way valve, a third valve, a fourth valve and a fifth valve, the indoor heat exchange equipment comprises an indoor main heat exchanger and an indoor auxiliary heat exchanger, the indoor main heat exchanger is connected with a first valve, the indoor auxiliary heat exchanger is connected with a second valve, and the first valve and the second valve are connected to outdoor heat exchange equipment through liquid side pipes; the third valve is connected between the liquid side pipe and the steam side pipe; the fourth valve is connected between the first end of the four-way valve and the indoor auxiliary heat exchanger; the fifth valve is connected between the air suction port and the indoor auxiliary heat exchanger; through the technical scheme, the indoor machine can continuously heat in the process of heating defrosting, and more comfortable experience is brought to a user.

Description

Heat pump system, control method, control device, air conditioner and storage medium

Technical Field

The present application relates to the field of heat pump systems, and in particular, to a heat pump system, a control method, a control device, an air conditioner, and a computer readable storage medium.

Background

With the continuous development of economy and continuous progress of technology, the living standard of people is continuously improved, and the heat pump air conditioning system is increasingly applied to the daily life of people. However, in order to prevent the indoor unit from blowing cold air in a defrosting mode of the current heat pump air conditioning system, an indoor fan stops running during defrosting, and a low-temperature liquid refrigerant of an indoor evaporator transfers heat and absorbs heat by the surface of the evaporator; in the process of heating defrosting, the indoor unit cannot continuously heat, so that the temperature of an indoor space is reduced, and uncomfortable use experience is brought to a user.

Disclosure of Invention

The embodiment of the application provides a heat pump system, a control method, a control device, an air conditioner and a computer readable storage medium, which can enable indoor units to continuously heat in the process of heating and defrosting, and bring more comfortable experience to users.

An embodiment of a first aspect of the present application provides a heat pump system comprising:

A compressor including an exhaust port and an intake port;

The indoor heat exchange equipment comprises an indoor main heat exchanger and an indoor auxiliary heat exchanger, wherein the indoor main heat exchanger is connected with a first valve, the indoor auxiliary heat exchanger is connected with a second valve, and the first valve and the second valve are connected to the outdoor heat exchange equipment through liquid side pipes;

The four-way valve comprises a first end connected with the exhaust port, a second end connected to the indoor main heat exchanger through a steam side pipe, a third end connected with the air suction port and a fourth end used for connecting the outdoor heat exchange equipment;

the third valve is connected between the liquid side pipe and the steam side pipe;

the fourth valve is connected between the first end of the four-way valve and the indoor auxiliary heat exchanger;

And the fifth valve is connected between the air suction port and the indoor auxiliary heat exchanger.

The heat pump system according to the embodiment of the first aspect of the application has at least the following advantages: the indoor heat exchange equipment of the heat pump system comprises an indoor main heat exchanger and an indoor auxiliary heat exchanger, the indoor main heat exchanger is connected with a first valve, the indoor auxiliary heat exchanger is connected with a second valve, and the working states of the first valve, the second valve, the third valve, the fourth valve and the fifth valve are controlled so that the working states of the indoor main heat exchanger and the indoor auxiliary heat exchanger in the indoor heat exchange equipment are controlled; under the defrosting mode of the heat pump system, the indoor auxiliary heat exchanger can continue to heat, the indoor space temperature cannot be reduced, and more comfortable experience is brought to users.

In some embodiments, the heat pump system further comprises a refrigerant radiator and an economizer, the compressor further comprises an enthalpy injection port, the first valve and the second valve are both connected to a first end of a main path of the economizer through the liquid side pipe, a second end of the main path of the economizer is connected to the refrigerant radiator, a second end of the main path of the economizer is further connected to a first end of an auxiliary path of the economizer, a second end of the auxiliary path of the economizer is connected to the enthalpy injection port, and the refrigerant radiator is further connected to the outdoor heat exchange device.

An embodiment of a second aspect of the present application provides a control method applied to the heat pump system, where the method includes:

Acquiring a current operation mode;

And controlling the working states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve and the fifth valve according to the current operation mode so as to adjust the flow direction of the refrigerant flowing through the indoor main heat exchanger and the indoor auxiliary heat exchanger.

In some embodiments, the controlling the working states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve according to the current operation mode includes:

And under the condition that the current operation mode is a defrosting mode and the indoor heat exchange equipment has a heating requirement, the first valve and the fifth valve are controlled to be closed, the second valve, the third valve and the fourth valve are controlled to be opened, the second end and the third end of the four-way valve are communicated, and the first end and the fourth end of the four-way valve are communicated.

In some embodiments, the control method further comprises:

And under the condition that the indoor heat exchange equipment has no heating requirement, controlling the first valve to be closed and controlling the second valve to be at a first preset opening.

In some embodiments, the controlling the working states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve according to the current operation mode includes:

And under the condition that the current operation mode is a refrigeration mode and the indoor heat exchange equipment has refrigeration requirements, controlling the first valve, the second valve and the fifth valve to be opened, the third valve and the fourth valve to be closed, conducting the second end and the third end of the four-way valve, and conducting the first end and the fourth end of the four-way valve.

In some embodiments, the control method further comprises:

and under the condition that the indoor heat exchange equipment has no refrigeration requirement, controlling the first valve and the second valve to be closed.

In some embodiments, the controlling the working states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve according to the current operation mode includes:

And under the condition that the current operation mode is a heating mode and the indoor heat exchange equipment has heating requirements, controlling the first valve, the second valve and the fourth valve to be opened, the third valve and the fifth valve to be closed, conducting the first end and the second end of the four-way valve, and conducting the third end and the fourth end of the four-way valve.

In some embodiments, the control method further comprises:

And under the condition that the indoor heat exchange equipment has no heating requirement, controlling the first valve to be at a second preset opening, and controlling the second valve to be at a third preset opening.

In some embodiments, the controlling the working states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve according to the current operation mode includes:

And under the condition that the current operation mode is a dehumidification reheating mode and the indoor heat exchange equipment has a dehumidification reheating requirement, controlling the first valve, the second valve and the fourth valve to be opened, closing the third valve and the fifth valve, conducting the second end and the third end of the four-way valve, and conducting the first end and the fourth end of the four-way valve.

In some embodiments, the control method further comprises:

And under the condition that the indoor heat exchange equipment has no dehumidification and reheating requirement, the first valve is controlled to be closed, and the second valve is at a fourth preset opening.

An embodiment of the third aspect of the present application provides a control apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the control method as described above when executing the computer program.

An embodiment of a fourth aspect of the present application provides an air conditioner including the heat pump system as described above, or the control device as described above.

An embodiment of the fifth aspect of the present application provides a computer-readable storage medium storing computer-executable instructions for performing the control method as described above.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

FIG. 1 is a schematic diagram of a system configuration of a heat pump system provided by an embodiment of the present application;

Fig. 2 is a flowchart of a control method applied to a heat pump system according to an embodiment of the present application;

FIG. 3 is a flowchart of a control method in a defrost mode provided by an embodiment of the present application;

FIG. 4 is a flow chart of a control method in a defrost mode according to another embodiment of the present application;

FIG. 5 is a flow chart of a control method in a cooling mode according to an embodiment of the present application;

FIG. 6 is a flow chart of a control method in a cooling mode according to another embodiment of the present application;

Fig. 7 is a flowchart of a control method in a heating mode according to an embodiment of the present application;

fig. 8 is a flowchart of a control method in a heating mode according to another embodiment of the present application;

FIG. 9 is a flowchart of a control method in a dehumidification reheat mode provided by an embodiment of the present application;

FIG. 10 is a flowchart of a control method in a dehumidification reheat mode provided by another embodiment of the present application;

fig. 11 is a schematic configuration diagram of a control device according to an embodiment of the present application.

Reference numerals:

The compressor 100, the indoor main heat exchanger 210, the indoor auxiliary heat exchanger 220, the first valve 310, the second valve 320, the four-way valve 400, the vapor side pipe 410, the liquid side pipe 420, the high-low pressure pipe 430, the outdoor heat exchange device 500, the economizer 610, the refrigerant radiator 620, the enhanced vapor injection electronic expansion valve 630, the outdoor main electronic expansion valve 700, the third valve 810, the fourth valve 820, the fifth valve 830, the gas-liquid separator 910, the oil separator 920, the high pressure sensor 930, the high pressure switch 940, the low pressure sensor 950, the exhaust gas temperature sensing bag 960, the suction gas temperature sensing bag 970, the oil return capillary 980, the liquid tank 990, the control device 1000, the processor 1100, and the memory 1200.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.

In the description of the present application, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.

The technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

With the continuous development of economy and continuous progress of technology, the living standard of people is continuously improved, and the heat pump air conditioning system is increasingly applied to the daily life of people. However, in order to prevent the indoor unit from blowing cold air in a defrosting mode of the current heat pump air conditioning system, an indoor fan stops running during defrosting, and a low-temperature liquid refrigerant of an indoor evaporator transfers heat and absorbs heat by the surface of the evaporator; in the process of heating defrosting, the indoor unit cannot continuously heat, so that the temperature of an indoor space is reduced, and uncomfortable use experience is brought to a user.

Based on the above, the embodiment of the application provides a heat pump system, a control method, a control device and an air conditioner, which can enable indoor units to continuously heat in the process of heating and defrosting, and bring more comfortable experience to users.

The following description is made with reference to the accompanying drawings:

Referring to fig. 1, a heat pump system according to an embodiment of the present application includes a compressor 100, a four-way valve 400, an outdoor heat exchange device 500, and an indoor heat exchange device, wherein: the compressor 100 includes a discharge port a, a suction port b, and an enthalpy-injection port c; the four-way valve 400 includes a first end d connected to the discharge port a, a second end e for being connected to the indoor heat exchange device through the steam side pipe 410, a third end f connected to the suction port b, and a fourth end g for being connected to the outdoor heat exchange device 500; the outdoor heat exchange apparatus 500 is further connected to the indoor heat exchange apparatus through the liquid side pipe 420, one indoor heat exchange apparatus in the embodiment of the present application includes one indoor main heat exchanger 210 and one indoor auxiliary heat exchanger 220, and the indoor main heat exchanger 210 is connected to the outdoor heat exchange apparatus 500 through the first valve 310 and the liquid side pipe 420, the indoor auxiliary heat exchanger 220 is connected to the outdoor heat exchange apparatus 500 through the second valve 320 and the liquid side pipe 420, and a plurality of indoor heat exchange apparatuses may be included in the heat pump system, and each indoor heat exchange apparatus includes the indoor main heat exchanger 210 and the indoor auxiliary heat exchanger 220, each indoor main heat exchanger 210 is connected to the second end e of the four-way valve 400 through the vapor side pipe 410, each indoor auxiliary heat exchanger 220 is connected to the fourth valve 820 and the fifth valve 830 through the high-low pressure pipe 430, wherein the fifth valve 830 is connected to the suction port b of the compressor 100, the fourth valve 820 is connected to the suction port a of the compressor 100, and a third valve 810 may be disposed between the liquid side pipe 420 and the vapor side pipe 410 of the heat pump system.

It is noted that when the heat pump system is operated in the defrosting mode, the first end d and the fourth end g of the four-way valve 400 are conducted, the second end e and the third end f of the four-way valve 400 are conducted, and a refrigerant flow direction in the heat pump system is as follows: the air outlet a of the compressor 100 to the first end d of the four-way valve 400 to the fourth end g of the four-way valve 400 to the outdoor heat exchange device 500 to the third valve 810 to the second end e of the four-way valve 400 to the third end f of the four-way valve 400 to the air inlet b of the compressor 100; the other refrigerant flow direction in the heat pump system is as follows: the discharge port a to the fourth valve 820 of the compressor 100 to the indoor auxiliary heat exchanger 220 to the second valve 320 to the third valve 810 to the second end e of the four-way valve 400 to the third end f of the four-way valve 400 to the suction port b of the compressor 100.

It should be noted that, in the defrosting mode, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 100 enters the outdoor heat exchange device 500 through the four-way valve 400, and is liquefied and released through the outdoor heat exchange device 500, so that the frost on the surface of the outdoor heat exchange device 500 can be melted, and defrosting operation can be achieved. The other path of refrigerant enters the indoor auxiliary heat exchange device through the fourth valve 820 and the high-low pressure pipe 430 to perform indoor heating treatment, then enters the liquid side pipe 420 through the second valve 320, then enters the third valve 810 after being combined with the previous path of refrigerant, and then enters the air suction port b of the compressor 100 through the second end e and the third end f of the four-way valve 400 through the combined refrigerant to realize one refrigerant cycle.

It should be noted that, when the heat pump system is in the defrosting mode, the first end d and the fourth end g of the four-way valve 400 need to be conducted, the second end e and the third end f of the four-way valve 400 need to be conducted, the second valve 320, the third valve 810 and the fourth valve 820 are opened, so that the refrigerant in the heat pump system can flow according to the condition of the valves, and further, the indoor heating can be further performed in the defrosting process, so that the indoor environment temperature is well prevented from being reduced, and more comfortable experience is brought to the user.

It is noted that when the heat pump system is operated in the cooling mode, the first end d and the fourth end g of the four-way valve 400 are turned on, the second end e and the third end f of the four-way valve 400 are turned on, and one refrigerant flow direction in the heat pump system is as follows: the air suction port b of the compressor 100 is from the air discharge port a of the compressor 100 to the first end d of the four-way valve 400 to the fourth end g of the four-way valve 400 to the outdoor heat exchange device 500 to the first valve 310 to the indoor main heat exchanger 210 to the second end e of the four-way valve 400 to the third end f of the four-way valve 400; the other refrigerant flow direction in the heat pump system is as follows: the discharge port a of the compressor 100 to the first end d of the four-way valve 400 to the fourth end g of the four-way valve 400 to the outdoor heat exchange device 500 to the second valve 320 to the indoor auxiliary heat exchanger 220 to the fifth valve 830 to the suction port b of the compressor 100.

It should be noted that, after the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 100 goes to the outdoor heat exchange device 500 through the four-way valve 400, it is liquefied and released heat through the outdoor heat exchange device 500, then the liquid refrigerant enters the indoor main heat exchanger 210 through the first valve 310 to perform heat absorption and refrigeration treatment, then returns to the air suction port b of the compressor 100 through the four-way valve 400, and the liquid refrigerant obtained by liquefying and releasing heat from the outdoor heat exchange device 500 also enters the indoor auxiliary heat exchanger 220 through the second valve 320 to perform heat absorption and refrigeration treatment, and then returns to the air suction port b of the compressor 100 through the fifth valve 830 again, so as to realize one refrigerant cycle.

It should be noted that, when the heat pump system is in the refrigeration mode, the first end d and the fourth end g of the four-way valve 400 need to be conducted, the second end e and the third end f of the four-way valve 400 need to be conducted, the first valve 310, the second valve 320 and the fifth valve 830 are opened, and the third valve 810 and the fourth valve 820 are closed, so as to control the flow direction of the refrigerant in the heat pump system, and further realize the refrigeration treatment of the indoor environment, so as to meet the refrigeration requirement of the user, and the whole adjustment process is simple, convenient and rapid; the mode switching of the heat pump system can be realized only by controlling the working state of the related valve, the control process is simple and convenient, and convenience is brought to the use of users.

It is noted that, when the heat pump system is operated in the heating mode, the first end d and the second end e of the four-way valve 400 are turned on, the third end f and the fourth end g of the four-way valve 400 are turned on, and one refrigerant flow direction in the heat pump system is as follows: the air suction port b of the compressor 100 is from the air discharge port a of the compressor 100 to the first end d of the four-way valve 400 to the second end e of the four-way valve 400 to the indoor main heat exchanger 210 to the first valve 310 to the outdoor heat exchange device 500 to the fourth end g of the four-way valve 400 to the third end f of the four-way valve 400; the other refrigerant flow direction in the heat pump system is as follows: the discharge port a to the fourth valve 820 of the compressor 100 to the indoor auxiliary heat exchanger 220 to the second valve 320 to the outdoor heat exchange device 500 to the fourth end g of the four-way valve 400 to the third end f of the four-way valve 400 to the suction port b of the compressor 100.

It should be noted that, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 100 goes to the indoor main heat exchanger 210 through the four-way valve 400 to perform condensation and heat release, then goes to the outdoor heat exchange device 500 through the first valve 310, and then goes back to the air suction port b of the compressor 100 through the four-way valve 400; the other path of high-temperature and high-pressure gaseous refrigerant compressed by the compressor 100 enters the indoor auxiliary heat exchanger 220 through the fourth valve 820 to perform condensation heat release, then enters the outdoor heat exchange device 500 through the second valve 320, and then returns to the air suction port b of the compressor 100 through the four-way valve 400, so as to realize one refrigerant cycle.

It should be noted that, in the case that the heat pump system is in the heating mode, the first end d and the second end e of the four-way valve 400 need to be conducted, the third end f and the fourth end g of the four-way valve 400 need to be conducted, the first valve 310, the second valve 320 and the fourth valve 820 are opened, the third valve 810 and the fifth valve 830 are closed, so as to control the flow direction of the refrigerant in the heat pump system, and also realize heating treatment of the indoor environment, so as to meet the refrigeration requirement of the user, and the whole adjusting process is simple, convenient and rapid; the mode switching of the heat pump system can be realized only by controlling the working state of the related valve, the control process is simple and convenient, and convenience is brought to the use of users.

It is noted that, when the heat pump system is operated in the dehumidification reheat mode, the first end d and the fourth end g of the four-way valve 400 are conducted, the second end e and the third end f of the four-way valve 400 are conducted, and one refrigerant flow direction in the heat pump system is as follows: the air suction port b of the compressor 100 is from the air discharge port a of the compressor 100 to the first end d of the four-way valve 400 to the fourth end g of the four-way valve 400 to the outdoor heat exchange device 500 to the first valve 310 to the indoor main heat exchanger 210 to the second end e of the four-way valve 400 to the third end f of the four-way valve 400; the other refrigerant flow direction in the heat pump system is as follows: the discharge port a to the fourth valve 820 of the compressor 100 to the indoor auxiliary heat exchanger 220 to the second valve 320 to the first valve 310 to the indoor main heat exchanger 210 to the second end e of the four-way valve 400 to the third end f of the four-way valve 400 to the suction port b of the compressor 100.

It should be noted that, after the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 100 passes through the four-way valve 400 to the outdoor heat exchange device 500, the liquid refrigerant passes through the outdoor heat exchange device 500 to be liquefied and released, and then enters the liquid side pipe 420; the other path of high-temperature high-pressure gaseous refrigerant enters the indoor auxiliary heat exchanger 220 through the fourth valve 820 to perform condensation heat release treatment, then is converged with the other path of liquid refrigerant before the first valve 310 to enter the indoor main heat exchanger 210 to perform refrigeration treatment, and then the refrigerant returns to the air suction port b of the compressor 100 through the four-way valve 400, so that the dehumidification and reheating effects are realized.

It should be noted that, when the heat pump system is in the dehumidification reheat mode, the first end d and the fourth end g of the four-way valve 400 need to be conducted, the second end e and the third end f of the four-way valve 400 need to be conducted, the first valve 310, the second valve 320 and the fourth valve 820 are opened, and the third valve 810 and the fifth valve 830 are closed, so as to control the flow direction of the refrigerant in the heat pump system, and further realize dehumidification reheat treatment on the indoor environment, so as to meet the refrigeration requirement of a user, and the whole adjustment process is simple, convenient and quick; the mode switching of the heat pump system can be realized only by controlling the working state of the related valve, the control process is simple and convenient, and convenience is brought to the use of users. The dehumidification reheating mode is to heat dehumidified cold air and send the dehumidified cold air into a room so as to reduce the influence of dehumidified low-temperature air on the indoor temperature.

In some embodiments of the present application, the heat pump system may include a plurality of indoor heat exchange apparatuses, and each of the indoor heat exchange apparatuses may include an indoor main heat exchanger 210 and an indoor auxiliary heat exchanger 220, and each of the indoor heat exchange apparatuses has a heating demand, a cooling demand, a dehumidifying and reheating demand, or no demand, so that the first valve 310 of the indoor main heat exchanger 210 and the second valve 320 of the indoor auxiliary heat exchanger 220 may be controlled in case of different demands.

Referring to fig. 1, in some embodiments of the present application, an economizer 610 and a refrigerant radiator 620 may be further provided between the outdoor heat exchange device 500 and the indoor heat exchange device; wherein the economizer 610 comprises a main path and an auxiliary path, a first end of the main path of the economizer 610 is connected to the indoor heat exchange equipment through the liquid side pipe 420, a second end of the main path of the economizer 610 is connected to the refrigerant radiator 620, a second end of the main path of the economizer 610 is also connected to a first end of the auxiliary path of the economizer 610 through the enhanced vapor injection electronic expansion valve 630, and a second end of the auxiliary path of the economizer 610 is connected to the vapor injection port of the compressor 100; the enhanced vapor injection electronic expansion valve 630 may throttle and decompress a portion of the liquid refrigerant flowing out of the main path of the economizer 610, so that the condensation point in the corresponding pressure state is reduced, and vaporization of a portion of the liquid refrigerant in the auxiliary path is realized, thereby being capable of performing heat exchange with the refrigerant in the main path, absorbing heat in the main path, so that the temperature of the refrigerant in the main path is reduced, and adjusting the inlet flow rate of the auxiliary path, thereby adjusting the amount of the refrigerant delivered to the vapor injection port c of the compressor 100; by the above setting, the discharge amount of the compressor 100 can be increased, the amount of circulating refrigerant in the indoor heat exchange device can be increased, and the heating amount can be increased. The second end of the main path of the economizer 610 is also connected to a refrigerant radiator 620, and the refrigerant radiator 620 is also connected to the outdoor heat exchange device 500 through an outdoor main electronic expansion valve 700; with the above-described configuration, the refrigerant discharged from the outdoor heat exchanger enters the refrigerant radiator 620 through the outdoor main electronic expansion valve 700; the refrigerant radiator 620 mainly radiates heat to the electric control components of the outdoor unit, and the air conditioner generally has two modes of air cooling and refrigerant radiating and cooling at present, and the air cooling has the defects that the higher the ring temperature is, the higher the air temperature is, and the heat radiation is reduced; for the cooling mode of the refrigerant, the temperature of the refrigerant is not affected by the ring temperature, the cooling effect is better, the situation that the temperature of the electric control component is too high is well prevented, and the service life of the electric control component is prolonged.

Notably, the economizer 610 is a heat exchanger that absorbs heat by throttling the refrigerant itself to subcool another portion of the refrigerant; the economizer is used in a secondary air inlet screw compressor refrigerating system many times, under the working condition that the evaporating temperature is lower (below 25 ℃), the efficiency of a common single-stage screw compressor is reduced, the refrigerating capacity is reduced, the exhaust temperature is higher, and the economizer air supplementing cycle is adopted, so that the efficiency of the single-stage screw compression refrigerating cycle can be improved, the refrigerating capacity is improved, and the exhaust temperature of the compressor is reduced. The use of the economizer can lead the application range of the single-stage screw compressor to be wider and more economical; principle of economizer: the high-pressure liquid refrigerant from the condenser is divided into two parts after entering the economizer, one part is further cooled in a heat expansion mode through throttling to reduce the temperature of the other part, the other part is supercooled, and the stabilized supercooled liquid is directly fed into the evaporator for refrigeration through the liquid supply valve. And the other part of uncooled gaseous refrigerant passes through a communicating pipeline between the economizer and the compressor, and reenters the compressor to continue compression and enter the circulation. The liquid refrigeration medium is stabilized by the expansion refrigeration mode, so that the capacity and the efficiency of the system are improved. The electronic expansion valve utilizes the electric signal generated by the adjusted parameters to control the voltage or current applied to the expansion valve, thereby achieving the purpose of adjusting the liquid supply amount. The stepless variable capacity refrigerating system has wide refrigerating liquid supply quantity adjusting range, quick adjusting reaction is required, the traditional throttling device (such as a thermal expansion valve) is difficult to be well qualified, and the electronic expansion valve can well meet the requirement; an electronic expansion valve is a throttling element that can be programmed to throttle the flow of refrigerant into a refrigeration device. In some occasions with severe load variation or wider operating condition range, the traditional throttling elements (such as capillary tubes, thermal expansion valves and the like) cannot meet the requirements on comfort and energy conservation, and the electronic expansion valves are increasingly widely applied in combination with the compressor variable capacity technology.

It should be noted that the compressor 100 according to the embodiment of the present application may be an enthalpy-injection compressor; the jet enthalpy increasing technology is based on an enthalpy-increasing compressor, and medium-pressure section refrigerant injection technology is optimized. The principle is that a part of gas with intermediate pressure is sucked through the intermediate pressure suction hole and mixed with the refrigerant subjected to partial compression for recompression, so that two-stage compression is realized by a single compressor 100, the flow rate of the refrigerant in the condenser is increased, the enthalpy difference of the main circulation loop is enlarged, and the efficiency of the compressor 100 is greatly improved. The enthalpy-increasing compressor adopts a two-stage throttling intermediate jet technology, and adopts a flash evaporator to perform gas-liquid separation so as to realize the enthalpy-increasing effect; the air injection mixed cooling is performed while the air injection is performed during the middle and low pressure, and then the air injection mixed cooling is performed during the high pressure, so that the exhaust capacity of the compressor 100 is improved, and the aim of improving the heating capacity in a low-temperature environment is fulfilled; enthalpy-injecting compressors are widely used in scroll compressors; the high-efficiency subcooler plays a key role in the whole system, and on one hand, the refrigerant of the main circulation loop is subcooled before throttling, so that enthalpy difference is increased; on the other hand, the low-pressure low-temperature refrigerant in the auxiliary circuit (the refrigerant is led from the middle part of the compressor 100 to directly participate in compression) after being depressurized by the electronic expansion valve is appropriately preheated to reach an appropriate medium pressure, and is provided for the compressor 100 to perform secondary compression.

In some embodiments of the present application, the first, second and third valves 310, 320 and 810 of the present application may be electronic expansion valves, and the third, fourth and fifth valves 810, 820 and 830 may be solenoid valves, not being limited herein. The electronic expansion valve is a throttling element capable of adjusting the flow of the refrigerant entering the refrigeration device according to a preset program; in some occasions with severe load variation or wider operating condition range, the traditional throttling elements (such as capillary tubes, thermal expansion valves and the like) cannot meet the requirements on comfort and energy conservation, and the electronic expansion valves are increasingly widely applied in combination with the compressor variable capacity technology. Solenoid valves are electromagnetic controlled industrial equipment, are automatic basic elements for controlling fluids, and belong to actuators. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. Different solenoid valves function at different locations of the control system, most commonly one-way valves, safety valves, directional control valves, etc. The working principle of the electromagnetic valve is as follows: the electromagnetic valve is internally provided with a closed cavity, through holes are formed in different positions, each hole is communicated with different oil pipes, a valve is arranged in the middle of the cavity, two electromagnets are arranged on two sides, the magnet coil on which side is electrified can attract the valve body to which side, different oil discharging holes are blocked or leaked through the movement of the control valve body, the oil inlet holes are normally open, hydraulic oil can enter different oil discharging pipes, then the piston of the oil cylinder is pushed through the pressure of the oil, the piston drives the piston rod, and the piston rod drives the mechanical device to move. Thus controlling the current through the electromagnet controls the mechanical movement.

In some embodiments of the present application, the suction port b of the compressor 100 is also connected with a gas-liquid separator 910; in the outdoor heat exchange device 500 of the heat pump system, the liquid refrigerant evaporates in the outdoor heat exchange device 500, and the liquid refrigerant changes to gas, so that a part of the refrigerant may not completely evaporate and may directly enter the compressor 100 in consideration of the load change. Because of the incompressibility of the liquid refrigerant, before the liquid refrigerant does not enter the compressor 100, the gas and the liquid are separated first, so that the low-pressure low-temperature steam returned to the compressor 100 is prevented from carrying excessive liquid refrigerant into the cylinder of the compressor 100, and all the liquid refrigerant entering the compressor 100 is ensured to be gas, so that the compressor 100 can normally operate.

Referring to fig. 1, in the heat pump system provided by the embodiment of the present application, a liquid storage tank 990 is further included between the outlet of the gas-liquid separator 910 and the suction port b. It can be appreciated that by providing the liquid storage tank 990, redundant refrigerant can be stored, the pressure of the heat pump system is balanced, and the heat pump system is ensured to operate reliably in a heating mode. An oil separator 920 is also connected to the discharge port a of the compressor 100; in a vapor compression refrigeration system, the compressed refrigerant is in a high-pressure high-temperature overheat state; since the flow rate and the temperature are high when the refrigerant is discharged, part of the lubricating oil on the cylinder wall of the compressor 100 is inevitably discharged as oil vapor and oil drop particles together with the refrigerant vapor due to the effect of high temperature; the higher the exhaust temperature and the faster the flow speed, the more lubricating oil is discharged; however, the refrigerant and the oil are not mutually dissolved, so that when the lubricating oil enters the outdoor heat exchange device 500 together with the refrigerant, the lubricating oil is condensed into an oil film on the heat transfer wall surface, so that the heat resistance is increased, the heat transfer effect of the outdoor heat exchange device 500 is reduced, and the refrigerating effect is reduced. The oil separator 920 also re-enters the resulting lubricating oil into the compressor 100 through the oil return capillary 980 again through the suction port b of the compressor 100, so that the compressor 100 can continue to operate normally.

In some embodiments of the present application, an exhaust gas bulb 960 and a high pressure sensor 930 are further provided at the outlet position of the exhaust port a of the compressor 100, and the temperature of the gas discharged from the compressor 100 may be detected by the exhaust gas bulb 960, and the pressure of the gas discharged from the compressor 100 may be detected by the high pressure sensor 930. The intake port b of the compressor 100 is further provided with an intake bulb 970 and a low pressure sensor 950, and the temperature of the gas sucked into the compressor 100 can be detected by the intake bulb 970, and the pressure of the gas sucked into the compressor 100 by the low pressure sensor 950 can be detected. The parameters are detected, so that the working condition of the heat pump system can be well known, and the heat pump system is ready for subsequent adjustment.

In a second aspect, an embodiment of the present application provides a control method applied to the heat pump system of the embodiment of the first aspect, for example, to the heat pump system shown in fig. 1, and referring to fig. 2, the control method may include, but is not limited to, step S100 and step S200.

Step S100, obtaining a current operation mode;

And step 200, controlling the working states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve and the fifth valve according to the current operation mode so as to adjust the flow direction of the refrigerant flowing through the indoor main heat exchanger and the indoor auxiliary heat exchanger.

According to the control method provided by the embodiment of the invention, in the process of controlling the heat pump system, the current operation mode of the heat pump system is firstly determined, then the working states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve and the fifth valve of the heat pump system can be controlled based on the current operation mode, and then the flow directions of the refrigerants flowing through the indoor main heat exchanger and the indoor auxiliary heat exchanger can be adjusted so as to adapt to various different operation modes, the adjustment process is simple, convenient and quick, the heating quantity required by various scenes can be met, the energy is saved, the efficiency is high, and the applicability is strong.

The heat pump system is started and operated, a signal of a remote controller is received, an operation mode of the heat pump system is controlled according to the signal, and then the working states of the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the four-way valve are controlled and processed, so that the operation state of the heat pump system is controlled and processed.

As shown with reference to fig. 3, the above step S200 may include, but is not limited to, step S211 and step S212.

Step S211, determining that the current operation mode is a defrosting mode and the indoor heat exchange equipment has a heating requirement;

and S212, controlling the first valve and the fifth valve to be closed, and opening the second valve, the third valve and the fourth valve, wherein the second end and the third end of the four-way valve are communicated, and the first end and the fourth end of the four-way valve are communicated.

According to the control method provided by the embodiment of the application, when the current operation mode of the heat pump system is the defrosting mode and the indoor heat exchange equipment is determined to have a heating requirement, the first valve and the fifth valve can be controlled to be closed, so that the second valve, the third valve and the fourth valve are opened, the second end of the four-way valve is communicated with the third end of the four-way valve, and the first end of the four-way valve is communicated with the fourth end of the four-way valve.

Notably, the high-temperature high-pressure gaseous refrigerant compressed by the compressor goes to the outdoor heat exchange equipment through the four-way valve, and is liquefied and released through the outdoor heat exchange equipment, so that frosting on the surface of the outdoor heat exchange equipment can be melted, and defrosting operation is realized; the other path of refrigerant enters the indoor auxiliary heat exchange equipment through a fourth valve and a high-low pressure pipe so as to heat the indoor space, then enters the liquid side pipe through a second valve, then enters the third valve after being combined with the previous path of refrigerant, and then enters the air suction port of the compressor through the second end and the third end of the four-way valve through the combined refrigerant so as to realize one refrigerant cycle. Under the condition that the heat pump system is in a defrosting mode, the first end and the fourth end of the four-way valve are required to be conducted, the second end and the third end of the four-way valve are required to be conducted, the second valve, the third valve and the fourth valve are opened, then the refrigerant in the heat pump system can flow according to the condition of the valves, further indoor heating can be further realized in the defrosting process, the indoor environment temperature is well prevented from being reduced, more comfortable experience is brought to a user, and continuous heating treatment is realized.

As shown with reference to fig. 4, the above step S200 may include, but is not limited to, step S213 and step S214.

Step S213, determining that the current operation mode is a defrosting mode, and the indoor heat exchange equipment has no heating requirement;

In step S214, the first valve is controlled to be closed and the second valve is at a first preset opening.

According to the control method provided by the embodiment of the application, because a plurality of indoor heat exchange devices can be arranged in the heat pump system, when the current operation mode of the heat pump system is a defrosting mode and the indoor heat exchange devices are determined to be free of heating requirements, the first valves corresponding to the corresponding indoor heat exchange devices are closed, and the second valves corresponding to the indoor heat exchange devices are positioned at a first preset opening; closing the first valve, so as to prevent the refrigerant from entering the indoor main heat exchanger for heating; the second valve is in the first preset opening degree, because if the second valve is in a closed state, the refrigerant on the high-pressure side is accumulated in the indoor auxiliary heat exchanger for a long time, the refrigerant and the refrigerating oil are stored in the heat exchanger, and then heat exchange condensation is carried out in the indoor auxiliary heat exchanger and the environment side, so that the refrigerating oil and the refrigerant are easily lacked in the heat pump system, the effect of operating the indoor heat exchange equipment can be affected due to the insufficient circulation quantity of the refrigerant, the abnormal rise of the exhaust gas of the system is caused, and the situation that the compressor possibly lacks oil and is worn due to the lack of the refrigerating oil in the system is also caused. Therefore, in the defrosting mode, even if the indoor heat exchange equipment does not have a heating requirement, the second valve of the indoor heat exchange equipment is required to be at a certain opening degree, so that the refrigerant cannot accumulate in the indoor heat exchange equipment, and the whole heat pump system can normally run.

As shown with reference to fig. 5, the above step S200 may include, but is not limited to, step S221 and step S222.

Step S221, the current operation mode is a refrigeration mode and the indoor heat exchange equipment has refrigeration requirement;

In step S222, the first valve, the second valve and the fifth valve are controlled to be opened, the third valve and the fourth valve are controlled to be closed, the second end and the third end of the four-way valve are connected, and the first end and the fourth end of the four-way valve are connected.

According to the control method provided by the embodiment of the application, when the current operation mode of the heat pump system is the refrigeration mode and the indoor heat exchange equipment is determined to have refrigeration requirements, the third valve and the fourth valve can be controlled to be closed, the first valve, the second valve and the fifth valve are opened, the first end of the four-way valve is conducted with the third end of the four-way valve, and the second end of the four-way valve is conducted with the third end of the four-way valve.

It is noted that the high-temperature and high-pressure gaseous refrigerant compressed by the compressor goes to the outdoor heat exchange device through the four-way valve, is liquefied and released heat through the outdoor heat exchange device, then the liquid refrigerant enters the indoor main heat exchanger through the first valve to perform heat absorption and refrigeration treatment, then returns to the air suction port of the compressor through the four-way valve, and the liquid refrigerant obtained by the liquefied and released heat of the outdoor heat exchange device also enters the indoor auxiliary heat exchanger through the second valve to perform heat absorption and refrigeration treatment, and then returns to the air suction port of the compressor through the fifth valve, so that one refrigerant cycle is realized. Under the condition that the heat pump system is in a refrigeration mode, the first end and the fourth end of the four-way valve are required to be conducted, the second end and the third end of the four-way valve are required to be conducted, the first valve, the second valve and the fifth valve are opened, the third valve and the fourth valve are closed, so that the flow direction of a refrigerant in the heat pump system is controlled, the indoor environment is further refrigerated, the refrigeration requirement of a user is met, and the whole regulation process is simple, convenient and quick; the mode switching of the heat pump system can be realized only by controlling the working state of the related valve, the control process is simple and convenient, and convenience is brought to the use of users.

As shown with reference to fig. 6, the above step S200 may include, but is not limited to, step S223 and step S224.

Step S223, the current operation mode is a refrigeration mode and the indoor heat exchange equipment has no refrigeration requirement;

in step S224, the first valve and the second valve are controlled to be closed.

According to the control method provided by the embodiment of the application, because the heat pump system can be provided with the plurality of indoor heat exchange devices, when the current running mode of the heat pump system is the refrigerating mode and the indoor heat exchange devices are determined to be free of refrigerating requirements, the first valves corresponding to the corresponding indoor heat exchange devices are closed, and the second valves corresponding to the indoor heat exchange devices are also in the closed state, so that the refrigerant can be well prevented from entering the indoor main heat exchanger and the indoor auxiliary heat exchanger to perform refrigerating treatment, and the control process is simple, convenient and quick.

As shown with reference to fig. 7, the above step S200 may include, but is not limited to, step S231 and step S232.

Step S231, the current operation mode is a heating mode and the indoor heat exchange equipment has heating requirements;

and S232, controlling the first valve, the second valve and the fourth valve to be opened, closing the third valve and the fifth valve, conducting the first end and the second end of the four-way valve, and conducting the third end and the fourth end of the four-way valve.

According to the control method provided by the embodiment of the application, when the current operation mode of the heat pump system is the heating mode and the indoor heat exchange equipment is determined to have a heating requirement, the third valve and the fifth valve can be controlled to be closed, the first valve, the second valve and the fourth valve are opened, the first end of the four-way valve is communicated with the second end of the four-way valve, and the third end of the four-way valve is communicated with the fourth end of the four-way valve.

It is worth noting that the high-temperature and high-pressure gaseous refrigerant compressed by the compressor goes to the indoor main heat exchanger through the four-way valve to conduct condensation heat release, then enters the outdoor heat exchange equipment through the first valve, and then returns to the air suction port of the compressor through the four-way valve.

In addition, the high-temperature high-pressure gaseous refrigerant of the other path enters the indoor auxiliary heat exchanger through the fourth valve to carry out condensation heat release, then enters the outdoor heat exchange equipment through the second valve, and then returns to the air suction port of the compressor through the four-way valve, so that one refrigerant cycle is realized. Under the condition that the heat pump system is in a heating mode, the first end and the second end of the four-way valve are required to be conducted, the third end and the fourth end of the four-way valve are required to be conducted, the first valve, the second valve and the fourth valve are opened, the third valve and the fifth valve are closed, so that the flow direction of a refrigerant in the heat pump system is controlled, the indoor environment can be heated, the refrigerating requirement of a user is met, and the whole adjusting process is simple, convenient and quick; the mode switching of the heat pump system can be realized only by controlling the working state of the related valve, the control process is simple and convenient, and convenience is brought to the use of users.

As shown in fig. 8, the above step S200 may include, but is not limited to, step S233 and step S234.

Step S233, the current operation mode is a heating mode and the indoor heat exchange equipment has no heating requirement;

in step S234, the first valve is controlled to be at a second preset opening, and the second valve is controlled to be at a third preset opening.

According to the control method provided by the embodiment of the application, because a plurality of indoor heat exchange devices can be arranged in the heat pump system, when the current operation mode of the heat pump system is a heating mode and the indoor heat exchange devices are determined to be free of heating requirements, the first valve corresponding to the corresponding indoor heat exchange device is at a second preset opening, and the second valve corresponding to the indoor heat exchange device is at a third preset opening; the first valve and the second valve are both kept at a certain opening degree, because if the first valve and the second valve are in a closed state, the refrigerant at the high pressure side is accumulated in the indoor heat exchange equipment for a long time, the refrigerant and the refrigerating oil are stored in the heat exchanger, and then heat exchange condensation is carried out in the indoor heat exchange equipment and the environment side, so that the refrigerating oil deficiency and the refrigerant deficiency of the heat pump system are easily caused, the effect of operating the indoor heat exchange equipment can be influenced due to the insufficient circulation quantity of the refrigerant of the system, the exhaust of the system is abnormal, and the situation that the compressor possibly lacks oil and is worn due to the lack of the refrigerating oil of the system is also caused. Therefore, in the heating mode, even if the indoor heat exchange equipment does not have a heating requirement, the first valve and the second valve of the indoor heat exchange equipment are required to be at a certain opening degree, so that the refrigerant cannot accumulate in the indoor heat exchange equipment, and the whole heat pump system can normally run.

As shown with reference to fig. 9, the above step S200 may include, but is not limited to, step S241 and step S242.

Step S241, the current operation mode is a dehumidification and reheating mode and the indoor heat exchange equipment has a dehumidification and reheating requirement;

In step S242, the first valve, the second valve and the fourth valve are controlled to be opened, the third valve and the fifth valve are controlled to be closed, the second end and the third end of the four-way valve are connected, and the first end and the fourth end of the four-way valve are connected.

According to the control method provided by the embodiment of the application, when the current operation mode of the heat pump system is the dehumidification reheating mode and the indoor heat exchange equipment is determined to have the dehumidification reheating requirement, the third valve and the fifth valve can be controlled to be closed, the first valve, the second valve and the fourth valve are controlled to be opened, the second end of the four-way valve is communicated with the third end of the four-way valve, the first end of the four-way valve is communicated with the fourth end of the four-way valve, so that the high-temperature high-pressure gaseous refrigerant compressed by the compressor is led to the outdoor heat exchange equipment through the four-way valve, liquefied heat release is carried out through the outdoor heat exchange equipment, and then the liquid refrigerant enters the liquid side pipe.

In addition, the high-temperature high-pressure gaseous refrigerant of the other path enters the indoor auxiliary heat exchanger through the fourth valve to perform condensation heat release treatment, then is converged with the liquid refrigerant of the other path before the first valve to enter the indoor main heat exchanger to perform refrigeration treatment, and then the refrigerant returns to the air suction port of the compressor through the four-way valve, so that the dehumidification and reheating effects are realized. Under the condition that the heat pump system is in a dehumidification reheating mode, the first end and the fourth end of the four-way valve are required to be conducted, the second end and the third end of the four-way valve are required to be conducted, the first valve, the second valve and the fourth valve are opened, the third valve and the fifth valve are closed, so that the flow direction of a refrigerant in the heat pump system is controlled, the dehumidification reheating treatment of an indoor environment is further realized, the refrigerating requirement of a user is met, and the whole regulation process is simple, convenient and quick; the mode switching of the heat pump system can be realized only by controlling the working state of the related valve, the control process is simple and convenient, and convenience is brought to the use of users. The dehumidification reheating mode is to heat dehumidified cold air and send the dehumidified cold air into a room so as to reduce the influence of dehumidified low-temperature air on the indoor temperature.

As shown with reference to fig. 10, the above step S200 may include, but is not limited to, step S243 and step S244.

Step S243, the current operation mode is a dehumidification reheat mode and the indoor heat exchange equipment has no dehumidification reheat requirement;

in step S244, the first valve is controlled to be closed, and the second valve is at a fourth preset opening.

According to the control method provided by the embodiment of the application, because a plurality of indoor heat exchange devices can be arranged in the heat pump system, when the current operation mode of the heat pump system is a dehumidification reheating mode and the indoor heat exchange devices are determined to be free of dehumidification reheating requirements, the first valves corresponding to the corresponding indoor heat exchange devices are in a closed state, and the second valves corresponding to the indoor heat exchange devices are in a fourth preset opening; the first valve is in a closed state, so that the refrigerant is well prevented from entering the indoor main heat exchanger to be subjected to refrigeration treatment; however, the second valve needs to be at a certain opening degree, because if the second valve is in a closed state, the refrigerant and the refrigerant oil are stored in the heat exchanger when the refrigerant at the high pressure side accumulates in the indoor heat exchange equipment for a long time, and then heat exchange condensation is performed in the indoor heat exchange equipment and at the environment side, so that the refrigerant oil and the refrigerant oil are easily absent in the heat pump system, the effect of operating the indoor heat exchange equipment is affected due to the insufficient circulation amount of the refrigerant in the system, the abnormal exhaust of the system is increased, and the compressor is possibly damaged due to the lack of the refrigerant oil in the system. Therefore, in the dehumidification reheating mode, even if the indoor heat exchange equipment does not have dehumidification reheating requirements, the second valves of the indoor heat exchange equipment are required to be at a certain opening degree, so that the refrigerant cannot accumulate in the indoor heat exchange equipment, and the whole heat pump system can normally run.

Referring to fig. 11, the embodiment of the present application further provides a control device 1000, including a memory 1200, a processor 1100, and a computer program stored in the memory 1200 and capable of running on the processor 1100, where the processor 1100 executes the computer program to implement the control method as described in the above embodiment.

In addition, the embodiment of the application also provides an air conditioner which comprises the heat pump system or the control device.

Furthermore, the embodiment of the application also provides a computer-readable storage medium storing computer-executable instructions for executing the control method as described above.

The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network nodes. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer readable storage media (or non-transitory media) and communication media (or transitory media). The term computer-readable storage medium includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information, such as computer-readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer-readable storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-to-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

While the preferred embodiment of the present application has been described in detail, the present application is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.

Claims (14)

1. A heat pump system, comprising:

A compressor including an exhaust port and an intake port;

The indoor heat exchange equipment comprises an indoor main heat exchanger and an indoor auxiliary heat exchanger, wherein the indoor main heat exchanger is connected with a first valve, the indoor auxiliary heat exchanger is connected with a second valve, and the first valve and the second valve are connected to the outdoor heat exchange equipment through liquid side pipes;

The four-way valve comprises a first end connected with the exhaust port, a second end connected to the indoor main heat exchanger through a steam side pipe, a third end connected with the air suction port and a fourth end used for connecting the outdoor heat exchange equipment;

the third valve is connected between the liquid side pipe and the steam side pipe;

the fourth valve is connected between the first end of the four-way valve and the indoor auxiliary heat exchanger;

And the fifth valve is connected between the air suction port and the indoor auxiliary heat exchanger.

2. The heat pump system of claim 1, further comprising a refrigerant radiator and an economizer, wherein the compressor further comprises an enthalpy injection port, wherein the first valve and the second valve are both connected to a first end of a main path of the economizer through the liquid side pipe, wherein a second end of the main path of the economizer is connected to the refrigerant radiator, wherein the second end of the main path of the economizer is further connected to a first end of a secondary path of the economizer, wherein the second end of the secondary path of the economizer is connected to the enthalpy injection port, and wherein the refrigerant radiator is further connected to the outdoor heat exchange device.

3. A control method, characterized by being applied to the heat pump system according to any one of claims 1 to 2, the method comprising:

Acquiring a current operation mode;

And controlling the working states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve and the fifth valve according to the current operation mode so as to adjust the flow direction of the refrigerant flowing through the indoor main heat exchanger and the indoor auxiliary heat exchanger.

4. The control method according to claim 3, wherein the controlling the operating states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve according to the current operation mode includes:

And under the condition that the current operation mode is a defrosting mode and the indoor heat exchange equipment has a heating requirement, the first valve and the fifth valve are controlled to be closed, the second valve, the third valve and the fourth valve are controlled to be opened, the second end and the third end of the four-way valve are communicated, and the first end and the fourth end of the four-way valve are communicated.

5. The control method according to claim 4, characterized in that the control method further comprises:

And under the condition that the indoor heat exchange equipment has no heating requirement, controlling the first valve to be closed and controlling the second valve to be at a first preset opening.

6. The control method according to claim 3, wherein the controlling the operating states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve according to the current operation mode includes:

And under the condition that the current operation mode is a refrigeration mode and the indoor heat exchange equipment has refrigeration requirements, controlling the first valve, the second valve and the fifth valve to be opened, the third valve and the fourth valve to be closed, conducting the second end and the third end of the four-way valve, and conducting the first end and the fourth end of the four-way valve.

7. The control method according to claim 6, characterized in that the control method further comprises:

and under the condition that the indoor heat exchange equipment has no refrigeration requirement, controlling the first valve and the second valve to be closed.

8. The control method according to claim 3, wherein the controlling the operating states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve according to the current operation mode includes:

And under the condition that the current operation mode is a heating mode and the indoor heat exchange equipment has heating requirements, controlling the first valve, the second valve and the fourth valve to be opened, the third valve and the fifth valve to be closed, conducting the first end and the second end of the four-way valve, and conducting the third end and the fourth end of the four-way valve.

9. The control method according to claim 8, characterized in that the control method further comprises:

And under the condition that the indoor heat exchange equipment has no heating requirement, controlling the first valve to be at a second preset opening, and controlling the second valve to be at a third preset opening.

10. The control method according to claim 3, wherein the controlling the operating states of the four-way valve, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve according to the current operation mode includes:

And under the condition that the current operation mode is a dehumidification reheating mode and the indoor heat exchange equipment has a dehumidification reheating requirement, controlling the first valve, the second valve and the fourth valve to be opened, closing the third valve and the fifth valve, conducting the second end and the third end of the four-way valve, and conducting the first end and the fourth end of the four-way valve.

11. The control method according to claim 10, characterized in that the control method further comprises:

And under the condition that the indoor heat exchange equipment has no dehumidification and reheating requirement, the first valve is controlled to be closed, and the second valve is at a fourth preset opening.

12. A control device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the control method according to any one of claims 3 to 11 when executing the computer program.

13. An air conditioner comprising the heat pump system according to any one of claims 1 to 2, or the control device according to claim 12.

14. A computer-readable storage medium, characterized in that computer-executable instructions for performing the control method according to any one of claims 3 to 11 are stored.