Air conditioner heat pump system and control method thereof

Abstract

The invention discloses an air conditioner heat pump system and a control method thereof. The air conditioner heat pump system comprises a refrigerant circulation main loop, a first bypass branch and a control assembly. The refrigerant circulation main loop comprises a compressor, a four-way valve, an outdoor heat exchanger, a first throttling device and an indoor heat exchanger. The first bypass branch comprises a heat storage device and a second throttling device; the control assembly comprises a first control valve, a second control valve, a first three-way valve and a third control valve. The air conditioner heat pump system comprises a heating mode, a refrigerating mode, a defrosting mode and a heating and defrosting mode, and the four-way valve, the second throttling device and the control assembly are controlled so that the air conditioner heat pump system can be switched between at least two of the heating mode, the refrigerating mode, the defrosting mode and the heating and defrosting mode. According to the air conditioner heat pump system and the control method thereof, continuous heating can be achieved during defrosting, and the user experience can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular, to an air-conditioning heat pump system and a control method thereof. Background Art

[0002] When the existing air-conditioning heat pump system defrosts during heating in winter, it usually switches the air-conditioning heat pump system from the heating mode to the cooling mode. In this way, the indoor cooling mode will affect the user experience indoors. Summary of the Invention

[0003] The main object of the present invention is to provide an air-conditioning heat pump system and a control method thereof, which can continuously heat during defrosting and can improve the user experience.

[0004] According to one aspect of the present invention, an air-conditioning heat pump system is provided, including:

[0005] A main refrigerant circulation circuit, the main refrigerant circulation circuit includes a compressor, a four-way valve, an outdoor heat exchanger, a first throttling device, and an indoor heat exchanger. The compressor includes an outlet and an inlet. The outdoor heat exchanger includes a first port and a second port. The first throttling device includes a third port and a fourth port. The indoor heat exchanger includes a fifth port and a sixth port. The four-way valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port. Between the outlet and the first valve port, between the second valve port and the first port, between the third valve port and the inlet, between the fourth valve port and the sixth port, between the second port and the third port, and between the fourth port and the fifth port are all connected through pipelines;

[0006] It further includes: a first bypass branch, the first bypass branch includes a heat storage device and a second throttling device. The heat storage device includes a seventh port and an eighth port. Between the seventh port and the sixth port, and between the eighth port and the fourth valve port are all connected through pipelines. The second throttling device is connected to the pipeline between the seventh port and the sixth port;

[0007] A control component, the control component includes a first control valve, a second control valve, a first three-way valve and a third control valve. The first control valve is arranged on the pipeline between the fourth valve port and the sixth port. The second control valve is arranged on the pipeline between the second throttling device and the sixth port. The first three-way valve includes a fifth valve port, a sixth valve port and a seventh valve port. The first three-way valve is arranged on the pipeline between the second port and the third port, and the fifth valve port is communicated with the second port, the sixth valve port is communicated with the third port, and the seventh valve port is connected to the pipeline between the second control valve and the second throttling device through a pipeline. The third control valve includes an eighth valve port and a ninth valve port. The eighth valve port is connected to the pipeline between the outlet and the first valve port through a pipeline, and the ninth valve port is connected to the pipeline between the fourth port and the fifth port through a pipeline;

[0008] Wherein, the air-conditioning heat pump system includes a heating mode, a cooling mode, a defrosting mode and a heating + defrosting mode. By controlling the four-way valve, the second throttling device and the control component, the air-conditioning heat pump system can be switched between at least any two of the heating mode, the cooling mode, the defrosting mode and the heating + defrosting mode.

[0009] Further, the second control valve is a three-way valve. The second control valve includes a tenth valve port, an eleventh valve port and a twelfth valve port. The pipeline between the tenth valve port and the second throttling device and the pipeline between the eleventh valve port and the sixth port are both communicated through pipelines, and the twelfth valve port is connected to the pipeline between the fourth port and the fifth port through a pipeline;

[0010] And / or, the control component further includes a fourth control valve. The fourth control valve includes a thirteenth valve port and a fourteenth valve port. The thirteenth valve port is connected to the pipeline between the second throttling device and the heat storage device through a pipeline, and the fourteenth valve port is connected to the pipeline between the tenth valve port and the second throttling device through a pipeline;

[0011] Wherein, the air-conditioning heat pump system includes a heating + heat storage mode. By controlling the four-way valve, the second throttling device and the control component, the air-conditioning heat pump system can be switched between at least any two of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode and the heating + heat storage mode.

[0012] Further, the fourth control valve includes a two-way valve or a one-way valve. When the fourth control valve is a one-way valve, the one-way valve is conducted along the direction from the heat storage device to the second control valve.

[0013] Further, the air-conditioning heat pump system further includes a hot water heat exchanger, and the hot water heat exchanger includes a ninth port and a tenth port;

[0014] The third control valve is a three-way valve, and the third control valve further includes a fifteenth valve port, and the fifteenth valve port is communicated with the ninth port through a pipeline;

[0015] The control assembly further includes a second three-way valve, the second three-way valve includes a sixteenth valve port, a seventeenth valve port and an eighteenth valve port, the second three-way valve is arranged on the pipeline between the outlet and the first valve port, and the sixteenth valve port and the outlet, the seventeenth valve port and the first valve port, and the eighteenth valve port and the tenth port are all communicated through pipelines;

[0016] The air-conditioning heat pump system further includes a refrigeration + partial heat recovery for domestic hot water mode, a heating + domestic hot water production mode, a heat storage + domestic hot water production mode, and a heating + domestic hot water production + heat storage mode. By controlling the four-way valve, the second throttling device and the control assembly, the air-conditioning heat pump system can be switched between at least any two of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery for domestic hot water mode, the heating + domestic hot water production mode, the heat storage + domestic hot water production mode, and the heating + domestic hot water production + heat storage mode.

[0017] Further, the control assembly further includes a third three-way valve, the third three-way valve includes a nineteenth valve port, a twentieth valve port, and a twenty-first valve port, the third three-way valve is arranged on the pipeline between the twentieth valve port and the tenth port, and the twenty-first valve port and the tenth port, the nineteenth valve port and the eighteenth valve port, and the twentieth valve port and the third port are all communicated through pipelines;

[0018] The air-conditioning heat pump system further includes a refrigeration + full heat recovery for domestic hot water mode. By controlling the four-way valve, the second throttling device, and the control assembly, the air-conditioning heat pump system can be switched between at least any two of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode, the refrigeration + partial heat recovery for domestic hot water mode, the heating + domestic hot water production mode, the heat storage + domestic hot water production mode, the heating + domestic hot water production + heat storage mode, and the refrigeration + full heat recovery for domestic hot water mode.

[0019] Further, the air-conditioning heat pump system further includes a third throttling device, the third throttling device includes an eleventh port and a twelfth port, the eleventh port is connected by a pipeline to the pipeline between the fifth valve port and the second port, and the twelfth port is connected by a pipeline to the pipeline between the twentieth valve port and the third port;

[0020] The air-conditioning heat pump system further includes a domestic hot water production mode, by controlling the four-way valve, the second throttling device, and the control component, so that the air-conditioning heat pump system can switch between at least any two of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode, the heating + heat storage mode, the cooling + partial heat recovery domestic hot water production mode, the heating + domestic hot water production mode, the heat storage + domestic hot water production mode, the heating + domestic hot water production + heat storage mode, the cooling + full heat recovery domestic hot water production mode, and the domestic hot water production mode.

[0021] On the other hand, the present application also provides a control method for an air-conditioning heat pump system, and the control method is used to control the above-mentioned air-conditioning heat pump system;

[0022] Control the four-way valve, the second throttling device, and the control component to make the refrigerant of the air-conditioning heat pump system flow along the first circulation loop, wherein the refrigerant flow path in the first circulation loop is that the refrigerant flows through the outlet of the compressor, the outdoor heat exchanger, the first throttling device, the indoor heat exchanger, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the cooling mode;

[0023] Control the four-way valve, the second throttling device, and the control component to make the refrigerant of the air-conditioning heat pump system flow along the second circulation loop, wherein the refrigerant flow path in the second circulation loop is that the refrigerant flows through the outlet of the compressor, the indoor heat exchanger, the first throttling device, the outdoor heat exchanger, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the heating mode;

[0024] Control the four-way valve, the second throttling device, and the control component to make the refrigerant in the air-conditioning heat pump system flow along the third circulation loop, wherein the refrigerant flow path in the third circulation loop is that the refrigerant flows through the outlet of the compressor, the outdoor heat exchanger, the second throttling device, the heat storage device, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the defrosting mode; and / or,

[0025] Control the four-way valve, the second throttling device, and the control component so that the refrigerant in the air-conditioning heat pump system flows simultaneously along the third circulation loop and the fourth circulation loop. Among them, the refrigerant flow path in the fourth circulation loop is that the refrigerant flows through the outlet of the compressor, the outdoor heat exchanger, the second throttling device, the heat storage device, and the inlet of the compressor in sequence. The refrigerant flow path in the fourth circulation loop is that the refrigerant flows through the outlet of the compressor, the indoor heat exchanger, the second throttling device, the heat storage device, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the heating + defrosting mode.

[0026] Further, control the four-way valve, the second throttling device, and the control component so that the refrigerant in the air-conditioning heat pump system flows simultaneously along the second circulation loop and the fifth circulation loop. Among them, the refrigerant flow path in the fifth circulation loop is that the refrigerant flows through the outlet of the compressor, the heat storage device, the first throttling device, the outdoor heat exchanger, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the heating + heat storage mode.

[0027] Further, control the four-way valve, the second throttling device, and the control component so that the refrigerant in the air-conditioning heat pump system flows along the sixth circulation loop. Among them, the refrigerant flow path in the sixth circulation loop is that the refrigerant flows through the outlet of the compressor, the hot water heat exchanger, the indoor heat exchanger, the first throttling device, the outdoor heat exchanger, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the heating + producing domestic hot water mode; and / or,

[0028] Control the four-way valve, the second throttling device, and the control component so that the refrigerant in the air-conditioning heat pump system flows along the seventh circulation loop. Among them, the refrigerant flow path in the seventh circulation loop is that the refrigerant flows through the outlet of the compressor, the hot water heat exchanger, the outdoor heat exchanger, the first throttling device, the indoor heat exchanger, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the cooling + partial heat recovery for producing domestic hot water mode; and / or,

[0029] Control the four-way valve, the second throttling device, and the control component so that the refrigerant in the air-conditioning heat pump system flows along the eighth circulation loop. Among them, the refrigerant flow path in the eighth circulation loop is that the refrigerant flows through the outlet of the compressor, the hot water heat exchanger, the heat storage device, the first throttling device, the outdoor heat exchanger, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the heat storage + producing domestic hot water mode; and / or,

[0030] Control the four-way valve, the second throttling device, and the control component so that the refrigerant of the air-conditioning heat pump system flows simultaneously along the eighth circulation loop and the ninth circulation loop. Among them, the flow path of the refrigerant in the eighth circulation loop is that the refrigerant flows through the outlet of the compressor, the hot water heat exchanger, the heat storage device, the first throttling device, the outdoor heat exchanger, and the inlet of the compressor in sequence. The flow path of the refrigerant in the ninth circulation loop is that the refrigerant flows through the outlet of the compressor, the hot water heat exchanger, the indoor heat exchanger, the first throttling device, the outdoor heat exchanger, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the heating + domestic hot water production + heat storage mode.

[0031] Further, control the four-way valve, the second throttling device, and the control component so that the refrigerant of the air-conditioning heat pump system flows along the tenth circulation loop. Among them, the flow path of the refrigerant in the tenth circulation loop is that the refrigerant flows through the outlet of the compressor, the hot water heat exchanger, the first throttling device, the indoor heat exchanger, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the cooling + all heat recovery for domestic hot water production mode; and / or,

[0032] Control the four-way valve, the second throttling device, and the control component so that the refrigerant of the air-conditioning heat pump system flows along the eleventh circulation loop. Among them, the flow path of the refrigerant in the eleventh circulation loop is that the refrigerant flows through the outlet of the compressor, the hot water heat exchanger, the third throttling device, the outdoor heat exchanger, and the inlet of the compressor in sequence. At this time, the air-conditioning heat pump system is in the domestic hot water production mode.

[0033] In the present invention, since the air-conditioning heat pump system is provided with a first bypass branch, a second throttling device, and a control component, during actual use, by controlling the four-way valve, the second throttling device, and the control component on the main refrigerant circulation loop, the air-conditioning heat pump system can achieve uninterrupted heating during defrosting, which can improve the comfort during the use of the air-conditioning heat pump system and provide a better user experience. Description of the Drawings

[0034] The drawings described herein are used to provide a further understanding of the present invention and form a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0035] Figure 1 It is a partial connection relationship diagram in the air-conditioning heat pump system disclosed in the embodiment of the present application;

[0036] Figure 2 It is a connection relationship diagram of another part of the structure in the air-conditioning heat pump system disclosed in the embodiment of the present application;

[0037] Figure 3It is a connection diagram of the third part structure in the air-conditioning heat pump system disclosed in the embodiments of the present application;

[0038] Figure 4 It is a connection diagram of the fourth part structure in the air-conditioning heat pump system disclosed in the embodiments of the present application;

[0039] Figure 5 It is a connection diagram of the overall structure of the air-conditioning heat pump system disclosed in the embodiments of the present application;

[0040] Figure 6 It is a connection diagram of the overall structure of another alternative of the air-conditioning heat pump system disclosed in the embodiments of the present application;

[0041] Figure 7 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the cooling mode;

[0042] Figure 8 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the heating mode;

[0043] Figure 9 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the heating + defrosting mode;

[0044] Figure 10 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the defrosting mode;

[0045] Figure 11 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the heating + heat storage mode;

[0046] Figure 12 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the cooling + partial heat recovery for domestic hot water mode;

[0047] Figure 13 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the heating + domestic hot water mode;

[0048] Figure 14 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the heat storage + domestic hot water mode;

[0049] Figure 15 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the heating + heat storage + domestic hot water mode;

[0050] Figure 16 It is a refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application when in the cooling + full heat recovery for domestic hot water mode;

[0051] Figure 17 This is the refrigerant flow diagram of the air-conditioning heat pump system disclosed in the embodiments of the present application in the domestic hot water heating mode.

[0052] Among them, the above-mentioned drawings include the following reference numerals:

[0053] 10. Compressor; 11. Inlet; 12. Outlet; 20. Four-way valve; 21. First valve port; 22. Second valve port; 23. Third valve port; 24. Fourth valve port; 30. Outdoor heat exchanger; 31. First port; 32. Second port; 40. First throttling device; 41. Third port; 42. Fourth port; 50. Indoor heat exchanger; 51. Fifth port; 52. Sixth port; 60. Heat storage device; 61. Seventh port; 62. Eighth port; 70. Second throttling device; 80. First control valve; 90. Second control valve; 91. Tenth valve port; 92. Eleventh valve port; 93. Twelfth valve port; 100. First three-way valve; 101. Fifth valve port; 102. Sixth valve port; 103. Seventh valve port; 110. Third control valve; 111. Eighth valve port; 112. Ninth valve port; 113. Fifteenth valve port; 120. Fourth control valve; 121. Thirteenth valve port; 122. Fourteenth valve port; 130. Hot water heat exchanger; 131. Ninth port; 132. Tenth port; 140. Second three-way valve; 141. Sixteenth valve port; 142. Seventeenth valve port; 143. Eighteenth valve port; 150. Third three-way valve; 153. Nineteenth valve port; 151. Twentieth valve port; 152. Twenty-first valve port; 160. Third throttling device; 161. Eleventh port; 162. Twelfth port. Detailed implementation manners

[0054] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0055] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0057] As described in the background art, when the existing air-conditioning heat pump system needs to defrost in winter for heating, it usually switches the air-conditioning heat pump system from the heating mode to the cooling mode. At this time, the indoor is in the cooling mode, which will affect the user experience indoors. For this reason, the present application provides a new type of heat pump air-conditioning system, which can continue heating without stopping during defrosting, and can improve the comfort of using the air-conditioning system. The heat pump air-conditioning system of the present application will be introduced in detail below with reference to the drawings.

[0058] See Figure 1 and Figure 6 As shown, according to an embodiment of the present application, a heat pump air-conditioning system is provided. The heat pump air-conditioning system includes a main refrigerant circulation loop, a first bypass branch, and a control component.

[0059] As Figure 1 shown, the main refrigerant circulation loop includes a compressor 10, a four-way valve 20, an outdoor heat exchanger 30, a first throttling device 40, and an indoor heat exchanger 50. The compressor 10 includes an outlet 12 and an inlet 11. The outdoor heat exchanger 30 includes a first port 31 and a second port 32. The first throttling device 40 includes a third port 41 and a fourth port 42. The indoor heat exchanger 50 includes a fifth port 51 and a sixth port 52. The four-way valve 20 includes a first valve port 21, a second valve port 22, a third valve port 23, and a fourth valve port 24. Between the outlet 12 and the first valve port 21, between the second valve port 22 and the first port 31, between the third valve port 23 and the inlet 11, between the fourth valve port 24 and the sixth port 52, between the second port 32 and the third port 41, and between the fourth port 42 and the fifth port 51 are all connected through pipes. Among them, the first throttling device 40 includes a throttling element such as a throttle expansion valve or a capillary tube.

[0060] The first bypass branch includes a heat storage device 60 and a second throttling device 70. The heat storage device 60 includes a seventh port 61 and an eighth port 62. The seventh port 61 and the sixth port 52, as well as the eighth port 62 and the fourth valve port 24, are connected through pipelines. The second throttling device 70 is connected to the pipeline between the seventh port 61 and the sixth port 52. Among them, the second throttling device 70 includes throttling elements such as a throttle expansion valve or a capillary tube. The heat storage device 60 can be a phase change heat storage plate or a phase change heat storage capsule, etc. Among them, the phase change heat storage plate is made by encapsulating a phase change material in a plate-shaped container. When the air-conditioning heat pump system is heating, the phase change material absorbs heat and undergoes a phase change (such as changing from a solid state to a liquid state) to store heat; when heat supply is required, the phase change material changes back from a liquid state to a solid state to release heat, and the latent heat of phase change can be effectively utilized for heat storage and heat release, and a large amount of heat can be stored in a relatively small volume. The phase change heat storage capsule is a structure in which a phase change material is wrapped in tiny capsules and then these capsules are filled in a specific container or pipeline. The phase change heat storage capsule can be flexibly arranged in the air-conditioning system according to needs, which can improve the heat storage density and stability of the system, and is suitable for some air-conditioning heat pump systems with high space requirements and precise temperature control.

[0061] The control assembly includes a first control valve 80, a second control valve 90, a first three-way valve 100, and a third control valve 110. The first control valve 80 is arranged on the pipeline between the fourth valve port 24 and the sixth port 52. The second control valve 90 is arranged on the pipeline between the second throttling device 70 and the sixth port 52. The first three-way valve 100 includes a fifth valve port 101, a sixth valve port 102, and a seventh valve port 103. The first three-way valve 100 is arranged on the pipeline between the second port 32 and the third port 41, and the fifth valve port 101 is connected to the second port 32, the sixth valve port 102 is connected to the third port 41, and the seventh valve port 103 is connected to the pipeline between the second control valve 90 and the second throttling device 70 through a pipeline. The third control valve 110 includes an eighth valve port 111 and a ninth valve port 112. The eighth valve port 111 is connected to the pipeline between the outlet 12 and the first valve port 21 through a pipeline, and the ninth valve port 112 is connected to the pipeline between the fourth port 42 and the fifth port 51 through a pipeline. Among them, the first control valve 80 is used to control the on-off of the pipeline between the fourth valve port 24 and the sixth port 52. The second control valve 90 is used to control the on-off of the pipeline between the second throttling device 70 and the sixth port 52. The first three-way valve 100 is used to control the on-off of the pipeline between the second port 32 and the third port 41, and between the second port 32 and the second control valve 90 and the second throttling device 70.

[0062] The air-conditioning heat pump system in this embodiment includes a heating mode, a cooling mode, a defrosting mode, and a heating + defrosting mode. By controlling the four-way valve 20, the second throttling device 70, and the control component, the air-conditioning heat pump system can be switched between at least any two of the heating mode, the cooling mode, the defrosting mode, and the heating + defrosting mode.

[0063] Specifically, as shown in Figure 1 , when it is necessary to switch the air-conditioning heat pump system to the cooling mode, only need to control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, and make the first valve port 21 and the second valve port 22 of the four-way valve 20 conduct, the third valve port 23 and the fourth valve port 24 conduct, and control all other valves in the air-conditioning heat pump system to close. Refer to Figure 7 . The high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 undergoes condensation and heat release through the outdoor heat exchanger 30, becoming a medium-temperature and medium-pressure liquid refrigerant. This liquid refrigerant undergoes throttling expansion through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture state, and then enters the indoor heat exchanger 50. The refrigerant absorbs heat and evaporates in the indoor heat exchanger 50 for refrigeration, becoming a low-temperature and low-pressure gaseous refrigerant, and further flows through the first control valve 80 and then returns to the compressor 10 from the inlet 11 of the compressor 10, and the entire air-conditioning heat pump system completes the cycle of the cooling mode.

[0064] As shown in Figure 1 , when it is necessary to switch the air-conditioning heat pump system to the heating mode, only need to control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, and make the first valve port 21 and the fourth valve port 24 of the four-way valve 20 conduct, the second valve port 22 and the third valve port 23 conduct, and control all other valves in the air-conditioning heat pump system to close. Refer to Figure 8 . The high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the indoor heat exchanger 50 through the first control valve 80 for condensation and heat release for heating, becoming a medium-temperature and medium-pressure liquid refrigerant. This liquid undergoes throttling expansion through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture state, and the refrigerant further enters the outdoor heat exchanger 30. The refrigerant absorbs heat and evaporates in the outdoor heat exchanger 30, becoming a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10 from the inlet 11 of the compressor 10, and the entire air-conditioning heat pump system completes the cycle of the heating mode.

[0065] As shown in Figure 1As shown, when it is necessary to switch the air-conditioning heat pump system to the heating + defrosting mode, it is only necessary to control the first control valve 80 to close, control the fifth valve port 101 and the seventh valve port 103 of the first three-way valve 100 to conduct, control the second control valve 90 and the third control valve 110 to open, and make the first valve port 21 and the second valve port 22 of the four-way valve 20 conduct, the third valve port 23 and the fourth valve port 24 conduct, and control all other valves in the air-conditioning heat pump system to close. See Figure 9 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 is divided into two paths and flows through the third control valve 110 and the four-way valve 20 respectively. Among them, the refrigerant flowing into the third control valve 110 enters the indoor heat exchanger 50 to condense and release heat for heating. After that, the refrigerant flows into the second throttling device 70 to throttle and expand and then becomes a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state, and further enters the heat storage device 60 for evaporation and heat absorption, becoming a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10 from the inlet 11 of the compressor 10; the refrigerant flowing into the four-way valve 20 enters the outdoor heat exchanger 30 to condense and release heat for defrosting. After flowing through the outdoor heat exchanger 30, most of the refrigerant becomes a medium-temperature and medium-pressure liquid refrigerant, and then enters the second throttling device 70 to throttle and expand and then becomes a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state, and further enters the heat storage device 60 for evaporation and heat absorption, becoming a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10 from the inlet 11 of the compressor 10. At this time, the entire air-conditioning heat pump system completes the cycle of the heating + defrosting mode.

[0066] Combined with Figure 1 As shown, when it is necessary to switch the air-conditioning heat pump system to the defrosting mode, it is only necessary to control the fifth valve port 101 and the seventh valve port 103 of the first three-way valve 100 to conduct, control the first valve port 21 and the second valve port 22 of the four-way valve 20 to conduct, the third valve port 23 and the fourth valve port 24 to conduct, and control all other valves in the air-conditioning heat pump system to close. As Figure 10 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the outdoor heat exchanger 30 from the four-way valve 20 to condense and release heat for defrosting. After flowing through the outdoor heat exchanger 30, most of the refrigerant becomes a medium-temperature and medium-pressure liquid refrigerant, and then enters the second throttling device 70 to throttle and expand and then becomes a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state, and further enters the heat storage device 60 for evaporation and heat absorption, becoming a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10 from the inlet 11 of the compressor 10. At this time, the entire air-conditioning heat pump system completes the cycle of the defrosting mode.

[0067] It can be seen that, since the air-conditioning heat pump system in this embodiment is provided with a first bypass branch, a second throttling device 70 and a control component, during actual use, by controlling the four-way valve 20, the second throttling device 70 and the control component on the main refrigerant return loop, the air-conditioning heat pump system can achieve uninterrupted heating during defrosting, improve the comfort during the use of the air-conditioning heat pump system, and can be arbitrarily switched among multiple working modes, providing a better user experience.

[0068] Further, the first control valve 80 in this embodiment is a two-way valve or an on-off valve of other forms. The second control valve 90 is a three-way valve, which includes a tenth valve port 91, an eleventh valve port 92 and a twelfth valve port 93. Both between the tenth valve port 91 and the second throttling device 70 and between the eleventh valve port 92 and the sixth port 52 are connected through pipelines, and the twelfth valve port 93 is connected to the pipeline between the fourth port 42 and the fifth port 51 through a pipeline.

[0069] Optionally, the control component in this embodiment further includes a fourth control valve 120, which includes a thirteenth valve port 121 and a fourteenth valve port 122. The thirteenth valve port 121 is connected to the pipeline between the second throttling device 70 and the heat storage device 60 through a pipeline, and the fourteenth valve port 122 is connected to the pipeline between the tenth valve port 91 and the second throttling device 70 through a pipeline.

[0070] The air-conditioning heat pump system in this embodiment includes a heating + heat storage mode. During actual use, by controlling the four-way valve 20, the second throttling device 70 and the control component, the air-conditioning heat pump system can be switched between at least any two of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode, and the heating + heat storage mode. It should be noted that the second throttling device 70 in this embodiment can be a throttling device with adjustable flow opening. When the air-conditioning heat pump system is in the heating + heat storage mode, the second throttling device 70 can be in the fully open mode. At this time, the second throttling device 70 does not have a throttling effect. Of course, the fourth control valve 120 can also be controlled without controlling the opening and closing state of the second throttling device 70 so that the air-conditioning heat pump system can cycle in the heating + heat storage mode. The second throttling device 70 can also be a throttling device with non-adjustable flow opening. In the heating + heat storage mode, the second throttling device 70 is closed and does not have a throttling effect, and the refrigerant passes through the fourth control valve 120.

[0071] Specifically, in combination with Figure 2As shown, when it is necessary to switch the air-conditioning heat pump system to the heating + heat storage mode, only need to control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, control the tenth valve port 91 and the twelfth valve port 93 of the second control valve 90 to conduct, control the fourth control valve 120 to open and / or control the second throttling device 70 to be fully open, make the first valve port 21 and the fourth valve port 24 of the four-way valve 20 conduct, the second valve port 22 and the third valve port 23 conduct, and control all other valves in the air-conditioning heat pump system to be closed. Combined with Figure 11 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 is divided into two paths and enters the indoor heat exchanger 50 and the heat storage device 60 respectively. Among them, the gaseous refrigerant entering the indoor heat exchanger 50 releases heat for heating and becomes a medium-temperature and medium-pressure liquid refrigerant. Then it flows into the first throttling device 40 for throttling expansion to become a low-temperature and low-pressure liquid or gas-liquid mixed refrigerant, and then enters the outdoor heat exchanger 30 to absorb heat and become a low-temperature and low-pressure gaseous refrigerant and then returns to the compressor 10; the refrigerant entering the heat storage device 60 releases heat in the heat storage device 60 and is stored in the heat storage device 60. Then it becomes a medium-temperature and medium-pressure liquid refrigerant, further flows into the first throttling device 40 for throttling expansion into a low-temperature and low-pressure liquid or gas-liquid mixed refrigerant, and then enters the outdoor heat exchanger 30 to absorb heat and become a low-temperature and low-pressure gaseous refrigerant and then returns to the compressor 10. At this time, the entire air-conditioning heat pump system completes the cycle of the heating + heat storage mode.

[0072] Combined with Figure 2 and Figure 6 As shown, the fourth control valve 120 in this embodiment can be set as a two-way valve or a one-way valve. Among them, when the fourth control valve 120 is set as a one-way valve, the one-way valve conducts along the direction from the heat storage device 60 to the second control valve 90. In this application, by setting the fourth control valve 120 as a one-way valve, the manufacturing cost of the air-conditioning heat pump system can be reduced. Compared with the structure of setting the fourth control valve 120 as a two-way valve, when designing the control logic of the air-conditioning heat pump system, in some control modes of the air-conditioning heat pump system (such as the heating + heat storage mode), there is no need to consider the opening and closing timing of the fourth control valve 120, which can simplify the control logic of the air-conditioning heat pump system.

[0073] See Figure 3 As shown, the air-conditioning heat pump system in this embodiment further includes a hot water heat exchanger 130, and the hot water heat exchanger 130 includes a ninth port 131 and a tenth port 132. The third control valve 110 is a three-way valve, and the third control valve 110 further includes a fifteenth valve port 113, wherein the fifteenth valve port 113 is connected to the ninth port 131 through a pipeline.

[0074] Further, the control component further includes a second three-way valve 140, which includes a sixteenth valve port 141, a seventeenth valve port 142, and an eighteenth valve port 143. The second three-way valve 140 is disposed on the pipeline between the outlet 12 and the first valve port 21, and the pipeline between the sixteenth valve port 141 and the outlet 12, the pipeline between the seventeenth valve port 142 and the first valve port 21, and the pipeline between the eighteenth valve port 143 and the tenth port 132 are all communicated through pipelines.

[0075] In this embodiment, the air-conditioning heat pump system further includes a refrigeration + partial heat recovery for domestic hot water mode, a heating + domestic hot water mode, a heat storage + domestic hot water mode, and a heating + domestic hot water + heat storage mode. During use, by controlling the four-way valve 20, the second throttling device 70, and the control component, the air-conditioning heat pump system can be switched between at least any two of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery for domestic hot water mode, the heating + domestic hot water mode, the heat storage + domestic hot water mode, and the heating + domestic hot water + heat storage mode.

[0076] See Figure 3 As shown, when it is necessary to switch the air-conditioning heat pump system to the refrigeration + partial heat recovery for domestic hot water mode, only need to control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to be conducted, control the eighth valve port 111 and the fifteenth valve port 113 of the third control valve 110 to be conducted, control the seventeenth valve port 142 and the eighteenth valve port 143 of the second three-way valve 140 to be conducted, control the first valve port 21 and the second valve port 22 of the four-way valve 20 to be conducted, the third valve port 23 and the fourth valve port 24 to be conducted, and at the same time control all other valves of the air-conditioning heat pump system to be closed. As Figure 12 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure gaseous refrigerant. Then it passes through the four-way valve 20 and enters the outdoor heat exchanger 30 to become a medium-temperature and medium-pressure liquid refrigerant. The medium-temperature and medium-pressure liquid refrigerant throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture state. Then it enters the indoor heat exchanger 50 to absorb heat and evaporate for refrigeration. Then it becomes a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20. At this time, the entire air-conditioning heat pump system completes the cycle of the refrigeration + partial heat recovery for domestic hot water mode. Among them, the partial heat recovery mentioned here means that the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 does not undergo a phase change in the hot water heat exchanger 130 and does not release the latent heat of phase change.

[0077] See Figure 3As shown in the figure, when it is necessary to switch the air-conditioning heat pump system to the heating + domestic hot water mode, only need to control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, control the eighth valve port 111 and the fifteenth valve port 113 of the third control valve 110 to conduct, control the seventeenth valve port 142 and the eighteenth valve port 143 of the second three-way valve 140 to conduct, control the first valve port 21 and the fourth valve port 24 of the four-way valve 20 to conduct, the second valve port 22 and the third valve port 23 to conduct, and at the same time control all other valves of the air-conditioning heat pump system to close. As Figure 13 As shown in the figure, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure gaseous refrigerant. Then it passes through the four-way valve 20 and enters the indoor heat exchanger 50 to become a medium-temperature and medium-pressure liquid refrigerant. The medium-temperature and medium-pressure liquid refrigerant throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state. Then it enters the outdoor heat exchanger 30, and then becomes a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20 to complete the cycle of the heating + domestic hot water mode of the air-conditioning heat pump system.

[0078] See Figure 3 As shown in the figure, when it is necessary to switch the air-conditioning heat pump system to the heat storage + domestic hot water mode, only need to control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, control the eighth valve port 111 and the fifteenth valve port 113 of the third control valve 110 to conduct, control the seventeenth valve port 142 and the eighteenth valve port 143 of the second three-way valve 140 to conduct, control the tenth valve port 91 and the twelfth valve port 93 of the second control valve 90 to communicate, control the fourth control valve 120 to open and / or control the second throttling device 70 to be fully open, control the first valve port 21 and the fourth valve port 24 of the four-way valve 20 to conduct, the second valve port 22 and the third valve port 23 to conduct, and at the same time control all other valves of the air-conditioning heat pump system to close. As Figure 14 As shown in the figure, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure gaseous refrigerant. Then it passes through the four-way valve 20 and enters the heat storage device 60 to release heat and store the heat in the heat storage device 60. The refrigerant becomes a low-temperature and low-pressure liquid refrigerant after passing through the heat storage device 60. The low-temperature and low-pressure liquid refrigerant throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state. Then it enters the outdoor heat exchanger 30, and then becomes a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20 to complete the cycle of the heat storage + domestic hot water mode of the air-conditioning heat pump system.

[0079] See Figure 3 As shown, when it is necessary to switch the air-conditioning heat pump system to the heating + domestic hot water heating + heat storage mode, only need to control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, control the eighth valve port 111 and the fifteenth valve port 113 of the third control valve 110 to conduct, control the seventeenth valve port 142 and the eighteenth valve port 143 of the second three-way valve 140 to conduct, control the tenth valve port 91 and the twelfth valve port 93 of the second control valve 90 to communicate, control the fourth control valve 120 to conduct and / or control the second throttling device 70 to be fully open, control the first valve port 21 and the fourth valve port 24 of the four-way valve 20 to conduct, the second valve port 22 and the third valve port 23 to conduct, and at the same time control all other valves of the air-conditioning heat pump system to be closed. As Figure 15 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure gaseous refrigerant. Then it is divided into two paths through the four-way valve 20 and enters the heat storage device 60 and the indoor heat exchanger 50 respectively. Among them, the refrigerant entering the heat storage device 60 releases heat and stores the heat in the heat storage device 60. The refrigerant becomes a low-temperature and low-pressure liquid refrigerant after passing through the heat storage device 60. The low-temperature and low-pressure liquid refrigerant throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state, and then enters the outdoor heat exchanger 30, and then becomes a low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 10 through the four-way valve 20; the refrigerant entering the indoor heat exchanger 50 condenses and releases heat for heating, and then becomes a medium-temperature and medium-pressure liquid refrigerant. The liquid refrigerant further enters the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state, and becomes a low-temperature and low-pressure gaseous refrigerant through the outdoor heat exchanger 30 and returns to the compressor 10 to complete the cycle of the heating + domestic hot water heating + heat storage mode of the air-conditioning heat pump system.

[0080] See Figure 4 As shown, the control component in this embodiment further includes a third three-way valve 150. The third three-way valve 150 includes a nineteenth valve port 153, a twentieth valve port 151, and a twenty-first valve port 152. The third three-way valve 150 is arranged on the pipeline between the twentieth valve port 151 and the tenth port 132, and the pipelines between the twenty-first valve port 152 and the tenth port 132, between the nineteenth valve port 153 and the eighteenth valve port 143, and between the twentieth valve port 151 and the third port 41 are all connected through pipelines.

[0081] The air-conditioning heat pump system in this embodiment further includes a refrigeration + full heat recovery for domestic hot water mode. When in use, by controlling the four-way valve 20, the second throttling device 70, and the control component, the air-conditioning heat pump system can be switched between at least any two of the heating mode, the refrigeration mode, the defrosting mode, the heating + defrosting mode, the refrigeration + partial heat recovery for domestic hot water mode, the heating + domestic hot water production mode, the heat storage + domestic hot water production mode, the heating + domestic hot water production + heat storage mode, and the refrigeration + full heat recovery for domestic hot water mode.

[0082] See Figure 4 As shown, when it is necessary to switch the air-conditioning heat pump system to the refrigeration + full heat recovery for domestic hot water mode, only need to control the first control valve 80 to open, the eighth valve port 111 of the third control valve 110 is communicated with the fifteenth valve port 113, control the twenty-first valve port 152 of the third three-way valve 150 to be communicated with the twentieth valve port 151, control the third valve port 23 of the four-way valve 20 to be communicated with the fourth valve port 24, and at the same time control all other valves of the air-conditioning heat pump system to be closed. As Figure 16 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure liquid refrigerant. Then, it passes through the first throttling device 40 for throttling expansion to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture state. Then, it enters the indoor heat exchanger 50 to absorb heat and evaporate for refrigeration, becoming a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20 to complete the cycle of the refrigeration + full heat recovery for domestic hot water mode of the air-conditioning heat pump system. Among them, the full heat recovery in this embodiment means that the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 undergoes a phase change in the hot water heat exchanger 130, releases the latent heat of phase change, and all the heat of the refrigerant is recovered in the hot water heat exchanger 130.

[0083] See Figure 5 As shown, the air-conditioning heat pump system in this embodiment further includes a third throttling device 160. The third throttling device 160 includes an eleventh port 161 and a twelfth port 162. The eleventh port 161 is connected by a pipeline to the pipeline between the fifth valve port 101 and the second port 32, and the twelfth port 162 is connected by a pipeline to the pipeline between the twentieth valve port 151 and the third port 41.

[0084] The air-conditioning heat pump system in this embodiment further includes a domestic hot water production mode. When in use, by controlling the four-way valve 20, the second throttling device 70, and the control component, the air-conditioning heat pump system can be switched between at least any two of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode, the heating + heat storage mode, the cooling + partial heat recovery for domestic hot water production mode, the heating + domestic hot water production mode, the heat storage + domestic hot water production mode, the heating + domestic hot water production + heat storage mode, the cooling + full heat recovery for domestic hot water production mode, and the domestic hot water production mode.

[0085] See Figure 5 As shown, when it is necessary to switch the air-conditioning heat pump system to domestic hot water production, only need to control the eighth valve port 111 of the third control valve 110 to communicate with the fifteenth valve port 113, control the twenty-first valve port 152 of the third three-way valve 150 to communicate with the twentieth valve port 151, control the third valve port 23 of the four-way valve 20 to communicate with the second valve port 22, and at the same time control all other valves of the air-conditioning heat pump system to be closed. As Figure 17 shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure liquid refrigerant. Then it passes through the third throttling device 160 for throttling expansion to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture state. Then it enters the outdoor heat exchanger 30 to absorb heat and evaporate into a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20, and finally flows into the compressor 10 through the four-way valve 20, completing the cycle of the domestic hot water production mode of the air-conditioning heat pump system.

[0086] On the other hand, see Figures 1 to 17 shown, the present application also provides a control method for an air-conditioning heat pump system, and this control method is used to control the above-mentioned air-conditioning heat pump system.

[0087] Specifically, the air-conditioning heat pump system in this embodiment has a cooling mode, a heating mode, a heating + defrosting mode, a defrosting mode, a heating + heat storage mode, a cooling + partial heat recovery for hot water production mode, a heating + hot water production mode, a heat storage + hot water production mode, a heating + hot water production + heat storage mode, a cooling + full heat recovery for hot water production mode, and a hot water production mode.

[0088] When actually in use, by controlling the four-way valve 20, the second throttling device 70, and the control component, the air-conditioning heat pump system can be switched between at least any two of the cooling mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the cooling + partial heat recovery for hot water production mode, the heating + hot water production mode, the heat storage + hot water production mode, the heating + hot water production + heat storage mode, the cooling + full heat recovery for hot water production mode, and the hot water production mode.

[0089] See Figure 7 Figure 7 As shown, when it is necessary to switch the air-conditioning heat pump system to the cooling mode, it is only necessary to control the sixteenth valve port 141 and the seventeenth valve port 142 of the second three-way valve 140 to conduct, control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, and make the first valve port 21 of the four-way valve 20 conduct with the second valve port 22, and the third valve port 23 conduct with the fourth valve port 24, so that the refrigerant of the air-conditioning heat pump system flows along the first circulation loop. Among them, the refrigerant flow path in the first circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the outdoor heat exchanger 30, the first throttling device 40, the indoor heat exchanger 50, and the inlet 11 of the compressor 10 in sequence. See Figure 7 Figure 7 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 is condensed and releases heat through the outdoor heat exchanger 30 to become a medium-temperature and medium-pressure liquid refrigerant. This liquid refrigerant throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state, and then enters the indoor heat exchanger 50. The refrigerant absorbs heat and evaporates in the indoor heat exchanger 50 to refrigerate, becoming a low-temperature and low-pressure gaseous refrigerant, and further flows through the first control valve 80 and then returns to the compressor 10 from the inlet 11 of the compressor 10, and the entire air-conditioning heat pump system completes the cycle of the cooling mode.

[0090] See Figure 8 Figure 8 As shown, when it is necessary to switch the air-conditioning heat pump system to the heating mode, it is only necessary to control the sixteenth valve port 141 and the seventeenth valve port 142 of the second three-way valve 140 to conduct, control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, and make the first valve port 21 of the four-way valve 20 conduct with the fourth valve port 24, the second valve port 22 conduct with the third valve port 23, and control all other valves in the air-conditioning heat pump system to be closed, so that the refrigerant of the air-conditioning heat pump system flows along the second circulation loop. Among them, the refrigerant flow path in the second circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the indoor heat exchanger 50, the first throttling device 40, the outdoor heat exchanger 30, and the inlet 11 of the compressor 10 in sequence. See Figure 8 Figure 8 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the indoor heat exchanger 50 through the first control valve 80 to condense and release heat for heating, becoming a medium-temperature and medium-pressure liquid refrigerant. This liquid throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state. The refrigerant further enters the outdoor heat exchanger 30, and the refrigerant absorbs heat and evaporates in the outdoor heat exchanger 30 to become a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10 from the inlet 11 of the compressor 10, and the entire air-conditioning heat pump system completes the cycle of the heating mode.

[0091] See Figure 9As shown, when it is necessary to switch the air-conditioning heat pump system to the heating + defrosting mode, only need to control the sixteenth valve port 141 and the seventeenth valve port 142 of the second three-way valve 140 to conduct, control the eighth valve port 111 and the ninth valve port 112 of the third control valve 110 to conduct, the fifth valve port 101 and the seventh valve port 103 of the first three-way valve 100 to conduct, control the tenth valve port 91 and the eleventh valve port 92 of the second control valve 90 to conduct, and make the first valve port 21 and the second valve port 22 of the four-way valve 20 conduct, the third valve port 23 and the fourth valve port 24 conduct, and control all other valves in the air-conditioning heat pump system to be closed, so that the refrigerant in the air-conditioning heat pump system flows along the third circulation loop and the fourth circulation loop simultaneously. Among them, the refrigerant flow path in the third circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the outdoor heat exchanger 30, the second throttling device 70, the heat storage device 60, and the inlet 11 of the compressor 10 in sequence, and the refrigerant flow path in the fourth circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the indoor heat exchanger 50, the second throttling device 70, the heat storage device 60, and the inlet 11 of the compressor 10 in sequence. See Figure 9 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 is divided into two paths and flows through the third control valve 110 and the four-way valve 20 respectively. Among them, the refrigerant flowing into the third control valve 110 enters the indoor heat exchanger 50 to condense and release heat for heating. After that, the refrigerant flows into the second throttling device 70 to throttle and expand and then becomes a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state, and further enters the heat storage device 60 to evaporate and absorb heat, becoming a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10 from the inlet 11 of the compressor 10; the refrigerant flowing into the four-way valve 20 enters the outdoor heat exchanger 30 to condense and release heat for defrosting. After the refrigerant flows through the outdoor heat exchanger 30, most of it becomes a medium-temperature and medium-pressure liquid refrigerant, and then enters the second throttling device 70 to throttle and expand and then becomes a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state, and further enters the heat storage device 60 to evaporate and absorb heat, becoming a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10 from the inlet 11 of the compressor 10. At this time, the entire air-conditioning heat pump system completes the cycle of the heating + defrosting mode.

[0092] See Figure 10As shown, when it is necessary to switch the air-conditioning heat pump system to the defrosting mode, only need to control the sixteenth valve port 141 and the seventeenth valve port 142 of the second three-way valve 140 to conduct, control the fifth valve port 101 and the seventh valve port 103 of the first three-way valve 100 to conduct, and make the first valve port 21 and the second valve port 22 of the four-way valve 20 conduct, the third valve port 23 and the fourth valve port 24 conduct, and control all other valves in the air-conditioning heat pump system to be closed, so that the refrigerant in the air-conditioning heat pump system flows along the third circulation loop. Among them, the refrigerant flow path in the third circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the outdoor heat exchanger 30, the second throttling device 70, the heat storage device 60, and the inlet 11 of the compressor 10 in sequence. As Figure 10 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the outdoor heat exchanger 30 from the four-way valve 20 to condense and release heat for defrosting. After flowing through the outdoor heat exchanger 30, most of the refrigerant becomes a medium-temperature and medium-pressure liquid refrigerant, and then enters the second throttling device 70 to throttle and expand into a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state, and further enters the heat storage device 60 to evaporate and absorb heat, becoming a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10 from the inlet 11 of the compressor 10. At this time, the entire air-conditioning heat pump system completes the defrosting mode cycle.

[0093] See Figure 11 As shown, when it is necessary to switch the air-conditioning heat pump system to the heating + heat storage mode, only need to control the sixteenth valve port 141 and the seventeenth valve port 142 of the second three-way valve 140 to conduct, control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, control the tenth valve port 91 and the twelfth valve port 93 of the second control valve 90 to conduct, control the fourth control valve 120 to open and / or control the second throttling device 70 to be fully open, control the first valve port 21 and the fourth valve port 24 of the four-way valve 20 to conduct, the second valve port 22 and the third valve port 23 to conduct, and control all other valves in the air-conditioning heat pump system to be closed, so that the refrigerant in the air-conditioning heat pump system flows along the second circulation loop and the fifth circulation loop simultaneously. Among them, the refrigerant flow path in the fifth circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the heat storage device 60, the first throttling device 40, the outdoor heat exchanger 30, and the outlet 12 of the compressor 10 in sequence. At this time, the air-conditioning heat pump system is in the heating + heat storage mode. Combined with Figure 11As shown in the figure, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the indoor heat exchanger 50 and the heat storage device 60 respectively in two paths. Among them, the gaseous refrigerant entering the indoor heat exchanger 50 releases heat to generate heat and becomes a medium-temperature and medium-pressure liquid refrigerant. Then, it flows into the first throttling device 40 for throttling expansion to become a low-temperature and low-pressure liquid or gas-liquid mixed refrigerant, and then enters the outdoor heat exchanger 30 to absorb heat and become a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10; the refrigerant entering the heat storage device 60 releases heat in the heat storage device 60 and is stored in the heat storage device 60. Then, it becomes a medium-temperature and medium-pressure liquid refrigerant, further flows into the first throttling device 40 for throttling expansion to become a low-temperature and low-pressure liquid or gas-liquid mixed refrigerant, and then enters the outdoor heat exchanger 30 to absorb heat and become a low-temperature and low-pressure gaseous refrigerant, and then returns to the compressor 10. At this time, the entire air-conditioning heat pump system completes the cycle of the heating + heat storage mode.

[0094] See Figure 12 As shown in the figure, when it is necessary to switch the air-conditioning heat pump system to the cooling + partial heat recovery heating domestic hot water mode, only need to control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, control the eighth valve port 111 and the fifteenth valve port 113 of the third control valve 110 to conduct, control the seventeenth valve port 142 and the eighteenth valve port 143 of the second three-way valve 140 to conduct, control the twenty-first valve port 152 and the nineteenth valve port 153 of the third three-way valve 150 to conduct, control the first valve port 21 and the second valve port 22 of the four-way valve 20 to conduct, the third valve port 23 and the fourth valve port 24 to conduct, and at the same time control all other valves of the air-conditioning heat pump system to close, so that the refrigerant of the air-conditioning heat pump system flows along the seventh circulation loop. Among them, the flow path of the refrigerant in the seventh circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the hot water heat exchanger 130, the outdoor heat exchanger 30, the first throttling device 40, the indoor heat exchanger 50, and the inlet 11 of the compressor 10 in sequence. As Figure 12 As shown in the figure, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure gaseous refrigerant. Then, it enters the outdoor heat exchanger 30 through the four-way valve 20 and becomes a medium-temperature and medium-pressure liquid refrigerant. The medium-temperature and medium-pressure liquid refrigerant is throttled and expanded by the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state. Then, it enters the indoor heat exchanger 50 to absorb heat and evaporate for refrigeration. Then, it becomes a low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 10 through the four-way valve 20. At this time, the entire air-conditioning heat pump system completes the cycle of the cooling + partial heat recovery heating domestic hot water mode.

[0095] See Figure 13As shown in the figure, when it is necessary to switch the air-conditioning heat pump system to the heating + domestic hot water mode, only need to control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, control the eighth valve port 111 and the fifteenth valve port 113 of the third control valve 110 to conduct, control the seventeenth valve port 142 and the eighteenth valve port 143 of the second three-way valve 140 to conduct, control the twenty-first valve port 152 and the nineteenth valve port 153 of the third three-way valve 150 to conduct, control the first valve port 21 and the fourth valve port 24 of the four-way valve 20 to conduct, the second valve port 22 and the third valve port 23 to conduct, and at the same time control all other valves of the air-conditioning heat pump system to close, so that the refrigerant of the air-conditioning heat pump system flows along the sixth circulation loop. Among them, the flow path of the refrigerant in the sixth circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the hot water heat exchanger 130, the indoor heat exchanger 50, the first throttling device 40, the outdoor heat exchanger 30, and the inlet 11 of the compressor 10 in sequence. As Figure 13 As shown in the figure, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure gaseous refrigerant. Then it passes through the four-way valve 20 and enters the indoor heat exchanger 50 to become a medium-temperature and medium-pressure liquid refrigerant. The medium-temperature and medium-pressure liquid refrigerant throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture state. Then it enters the outdoor heat exchanger 30 to absorb heat and evaporate. Then it becomes a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20 to complete the cycle of the heating + domestic hot water mode of the air-conditioning heat pump system.

[0096] See Figure 14 As shown in the figure, when it is necessary to switch the air-conditioning heat pump system to the domestic hot water + heat storage mode, only need to control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, control the eighth valve port 111 and the fifteenth valve port 113 of the third control valve 110 to conduct, control the seventeenth valve port 142 and the eighteenth valve port 143 of the second three-way valve 140 to conduct, control the nineteenth valve port 153 and the twenty-first valve port 152 of the third three-way valve 150 to conduct, control the tenth valve port 91 and the twelfth valve port 93 of the second control valve 90 to communicate, control the fourth control valve 120 to conduct and / or control the second throttling device 70 to be fully open, control the first valve port 21 and the fourth valve port 24 of the four-way valve 20 to conduct, the second valve port 22 and the third valve port 23 to conduct, so that the refrigerant of the air-conditioning heat pump system flows along the eighth circulation loop. Among them, the flow path of the refrigerant in the eighth circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the hot water heat exchanger 130, the heat storage device 60, the first throttling device 40, the outdoor heat exchanger 30, and the inlet 11 of the compressor 10 in sequence. As Figure 14As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure gaseous refrigerant. Then, it passes through the four-way valve 20 and enters the heat storage device 60 to release heat and store the heat in the heat storage device 60. After passing through the heat storage device 60, the refrigerant becomes a low-temperature and low-pressure liquid refrigerant. This low-temperature and low-pressure liquid refrigerant throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture state. Then, it enters the outdoor heat exchanger 30 and becomes a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20, completing the cycle of the heat storage + domestic hot water mode of the air-conditioning heat pump system.

[0097] See Figure 15 As shown, when it is necessary to switch the air-conditioning heat pump system to the heating + domestic hot water + heat storage mode, only need to control the first control valve 80 to open, control the fifth valve port 101 and the sixth valve port 102 of the first three-way valve 100 to conduct, control the eighth valve port 111 and the fifteenth valve port 113 of the third control valve 110 to conduct, control the seventeenth valve port 142 and the eighteenth valve port 143 of the second three-way valve 140 to conduct, control the nineteenth valve port 153 and the twenty-first valve port 152 of the third three-way valve 150 to conduct, control the tenth valve port 91 and the twelfth valve port 93 of the second control valve 90 to communicate, control the fourth control valve 120 to conduct and / or control the second throttling device 70 to be fully open, control the first valve port 21 and the fourth valve port 24 of the four-way valve 20 to conduct, the second valve port 22 and the third valve port 23 to conduct, and at the same time control all other valves of the air-conditioning heat pump system to be closed, so that the refrigerant of the air-conditioning heat pump system flows simultaneously along the eighth cycle loop and the ninth cycle loop. Among them, the flow path of the refrigerant in the eighth cycle loop is that the refrigerant flows through the outlet 12 of the compressor 10, the hot water heat exchanger 130, the heat storage device 60, the first throttling device 40, the outdoor heat exchanger 30, and the inlet 11 of the compressor 10 in sequence. The flow path of the refrigerant in the ninth cycle loop is that the refrigerant flows through the outlet 12 of the compressor 10, the hot water heat exchanger 130, the indoor heat exchanger 50, the first throttling device 40, the outdoor heat exchanger 30, and the inlet 11 of the compressor 10 in sequence. As Figure 15As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and turns into a medium-temperature and medium-pressure gaseous refrigerant. Then, it is divided into two paths by the four-way valve 20 and enters the heat storage device 60 and the indoor heat exchanger 50 respectively. Among them, the refrigerant entering the heat storage device 60 releases heat and stores the heat in the heat storage device 60. After passing through the heat storage device 60, the refrigerant becomes a low-temperature and low-pressure liquid refrigerant. This low-temperature and low-pressure liquid refrigerant throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture state. Then, it enters the outdoor heat exchanger 30, and then becomes a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20, completing the cycle of the heating + domestic hot water production + heat storage mode of the air-conditioning heat pump system.

[0098] See Figure 16 As shown, when it is necessary to switch the air-conditioning heat pump system to the cooling + all heat recovery for domestic hot water production mode, only need to control the first control valve 80 to open, the eighth valve port 111 and the fifteenth valve port 113 of the third control valve 110 are conducted, control the twenty-first valve port 152 and the twentieth valve port 151 of the third three-way valve 150 to be conducted, and control the third valve port 23 and the fourth valve port 24 of the four-way valve 20 to be conducted, so that the refrigerant of the air-conditioning heat pump system flows along the tenth circulation loop. Among them, the flow path of the refrigerant in the tenth circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the hot water heat exchanger 130, the first throttling device 40, the indoor heat exchanger 50, and the inlet 11 of the compressor 10 in sequence. As Figure 16 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and turns into a medium-temperature and medium-pressure liquid refrigerant. Then, it throttles and expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture state. Then, it enters the indoor heat exchanger 50 to absorb heat and evaporate for cooling, becoming a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20, completing the cycle of the cooling + all heat recovery for domestic hot water production mode of the air-conditioning heat pump system.

[0099] See Figure 17As shown, when it is necessary to switch the air-conditioning heat pump system to produce domestic hot water, only need to control the eighth valve port 111 of the third control valve 110 to communicate with the fifteenth valve port 113, control the twentieth valve port 151 of the third three-way valve 150 to communicate with the twenty-first valve port 152, control the second valve port 22 of the four-way valve 20 to communicate with the third valve port 23, and at the same time control all other valves of the air-conditioning heat pump system to close so that the refrigerant of the air-conditioning heat pump system flows along the eleventh circulation loop. Among them, the flow path of the refrigerant in the eleventh circulation loop is that the refrigerant flows through the outlet 12 of the compressor 10, the hot water heat exchanger 130, the third throttling device 160, the outdoor heat exchanger 30, and the inlet 11 of the compressor 10 in sequence. As Figure 17 As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the hot water heat exchanger 130 through the third control valve 110. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130 and becomes a medium-temperature and medium-pressure liquid refrigerant. Then it passes through the third throttling device 160 for throttling expansion to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixed state. Then it enters the outdoor heat exchanger 30 to absorb heat and evaporate into a low-temperature and low-pressure gaseous refrigerant. Finally, it flows into the compressor 10 through the four-way valve 20, and finally flows into the compressor 10 through the four-way valve 20, completing the cycle of the domestic hot water production mode of the air-conditioning heat pump system.

[0100] According to the above embodiments, it can be known that the air-conditioning heat pump system and its control method of the present application at least have the following technical effects:

[0101] (1) The setting of the heat storage device in the present application enables heat storage for the heat storage device while heating (or when producing domestic hot water); and when the system defrosts, the refrigerant can be heated by the heat storage device to defrost, and at the same time, heating on the indoor side is realized, achieving continuous heating during defrosting, thereby improving the user experience.

[0102] (2) The air-conditioning heat pump system of the present application can realize free switching of 11 modes, making the system more flexible.

[0103] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made.

[0104] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0105] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air conditioning heat pump system, comprising: A refrigerant circulation main circuit, the refrigerant circulation main circuit comprising a compressor (10), a four-way valve (20), an outdoor heat exchanger (30), a first throttling device (40), and an indoor heat exchanger (50), the compressor (10) comprising an outlet (12) and an inlet (11), the outdoor heat exchanger (30) comprising a first port (31) and a second port (32), the first throttling device (40) comprising a third port (41) and a fourth port (42), the indoor heat exchanger (50) comprising a fifth port (51) and a sixth port (52), the four-way valve (20) comprises a first valve port (21), a second valve port (22), a third valve port (23) and a fourth valve port (24); the outlet (12) and the first valve port (21), the second valve port (22) and the first port (31), the third valve port (23) and the inlet (11), the fourth valve port (24) and the sixth port (52), the second port (32) and the third port (41), and the fourth port (42) and the fifth port (51) are all connected via pipelines; The invention is characterized in that it further comprises: a first bypass branch, the first bypass branch comprises a heat storage device (60) and a second throttling device (70), the heat storage device (60) comprises a seventh port (61) and an eighth port (62), the seventh port (61) and the sixth port (52), and the eighth port (62) and the fourth valve port (24) are both connected through a pipeline, and the second throttling device (70) is connected to the pipeline between the seventh port (61) and the sixth port (52); A control component, the control component comprising a first control valve (80), a second control valve (90), a first three-way valve (100) and a third control valve (110), wherein the first control valve (80) is arranged on a pipeline between the fourth valve port (24) and the sixth port (52), the second control valve (90) is arranged on a pipeline between the second throttling device (70) and the sixth port (52), the first three-way valve (100) comprises a fifth valve port (101), a sixth valve port (102) and a seventh valve port (103), the first three-way valve (100) is arranged between the second port (32) and the third port (41), The fifth valve port (101) is connected to the second port (32), the sixth valve port (102) is connected to the third port (41), the seventh valve port (103) is connected to the pipeline between the second control valve (90) and the second throttling device (70) through a pipeline, the third control valve (110) comprises an eighth valve port (111) and a ninth valve port (112), the eighth valve port (111) is connected to the pipeline between the outlet (12) and the first valve port (21) through a pipeline, and the ninth valve port (112) is connected to the pipeline between the fourth port (42) and the fifth port (51) through a pipeline; The air conditioning heat pump system includes a heating mode, a cooling mode, a defrost mode and a heating + defrost mode, and the air conditioning heat pump system is switched between at least any two of the heating mode, the cooling mode, the defrost mode and the heating + defrost mode by controlling the four-way valve (20), the second throttling device (70) and the control component.

2. The air conditioning heat pump system according to claim 1, characterized in that: The second control valve (90) is a three-way valve, and the second control valve (90) comprises a tenth valve port (91), an eleventh valve port (92) and a twelfth valve port (93); the tenth valve port (91) and the second throttling device (70), and the eleventh valve port (92) and the sixth port (52) are both connected via a pipeline, and the twelfth valve port (93) is connected to a pipeline between the fourth port (42) and the fifth port (51) via a pipeline; And / or, the control component further comprises a fourth control valve (120), the fourth control valve (120) comprising a thirteenth valve port (121) and a fourteenth valve port (122), the thirteenth valve port (121) being connected to a pipeline between the second throttling device (70) and the heat storage device (60) through a pipeline, and the fourteenth valve port (122) being connected to a pipeline between the tenth valve port (91) and the second throttling device (70) through a pipeline; The air conditioning heat pump system includes a heating + heat storage mode, and the air conditioning heat pump system is switched between at least any two modes of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode, and the heating + heat storage mode by controlling the four-way valve (20), the second throttling device (70) and the control component.

3. The air conditioning heat pump system according to claim 2, characterized in that: The fourth control valve (120) comprises a two-way valve or a one-way valve. When the fourth control valve (120) is a one-way valve, the one-way valve is connected in a direction from the heat storage device (60) to the second control valve (90).

4. The air conditioning heat pump system according to any one of claims 1 to 3, characterized in that: The air conditioning heat pump system further comprises a hot water heat exchanger (130), wherein the hot water heat exchanger (130) comprises a ninth port (131) and a tenth port (132); The third control valve (110) is a three-way valve, and the third control valve (110) further comprises a fifteenth valve port (113), wherein the fifteenth valve port (113) is connected to the ninth port (131) via a pipeline; The control component further comprises a second three-way valve (140), the second three-way valve (140) comprising a sixteenth valve port (141), a seventeenth valve port (142) and an eighteenth valve port (143), the second three-way valve (140) being arranged on a pipeline between the outlet (12) and the first valve port (21), and the sixteenth valve port (141) and the outlet (12), the seventeenth valve port (142) and the first valve port (21), and the eighteenth valve port (143) and the tenth port (132) are all in communication through pipelines; The air conditioning heat pump system also includes a cooling + partial heat recovery mode for producing domestic hot water, a heating + domestic hot water mode, a heat storage + domestic hot water mode, and a heating + domestic hot water + heat storage mode. By controlling the four-way valve (20), the second throttling device (70) and the control component, the air conditioning heat pump system can be switched between at least any two of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode, the heating + heat storage mode, the cooling + partial heat recovery mode for producing domestic hot water, the heating + domestic hot water mode, the heat storage + domestic hot water mode, and the heating + domestic hot water + heat storage mode.

5. The air conditioning heat pump system according to claim 4, characterized in that: The control component further comprises a third three-way valve (150), the third three-way valve (150) comprising a nineteenth valve port (153), a twentieth valve port (151), and a twenty-first valve port (152), the third three-way valve (150) being arranged on a pipeline between the twenty-first valve port (151) and the tenth port (132), and the twenty-first valve port (152) and the tenth port (132), the nineteenth valve port (153) and the eighteenth valve port (143), and the twenty-first valve port (151) and the third port (41) are all connected via pipelines; The air conditioning heat pump system also includes a refrigeration + full heat recovery mode for producing domestic hot water. By controlling the four-way valve (20), the second throttling device (70), and the control component, the air conditioning heat pump system can be switched between at least any two of the following modes: a heating mode, a refrigeration mode, a defrosting mode, a heating + defrosting mode, a refrigeration + partial heat recovery mode for producing domestic hot water, a heating + producing domestic hot water mode, a heat storage + producing domestic hot water mode, a heating + producing domestic hot water + heat storage mode, and a refrigeration + full heat recovery mode for producing domestic hot water.

6. The air conditioning heat pump system according to claim 5, characterized in that: The air conditioning heat pump system further comprises a third throttling device (160), the third throttling device (160) comprising an eleventh port (161) and a twelfth port (162), the eleventh port (161) being connected to a pipeline between the fifth valve port (101) and the second port (32) through a pipeline, and the twelfth port (162) being connected to a pipeline between the twentieth valve port (151) and the third port (41) through a pipeline; The air conditioning heat pump system also includes a domestic hot water making mode, by controlling the four-way valve (20), the second throttling device (70), and the control component, so that the air conditioning heat pump system switches between at least any two of the heating mode, the cooling mode, the defrosting mode, the heating + defrosting mode, the heating + heat storage mode, the cooling + partial heat recovery domestic hot water making mode, the heating + domestic hot water making mode, the heat storage + domestic hot water making mode, the heating + domestic hot water making + heat storage mode, the cooling + full heat recovery domestic hot water making mode, and the domestic hot water making mode.

7. A control method for an air conditioning heat pump system, characterized in that: The control method is used to control the air conditioning heat pump system according to any one of claims 1 to 6; The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant of the air-conditioning heat pump system flows along a first circulation loop, wherein the refrigerant flow path in the first circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the outdoor heat exchanger (30), the first throttling device (40), the indoor heat exchanger (50), and the inlet (11) of the compressor (10) in sequence, and at this time, the air-conditioning heat pump system is in a cooling mode; The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant of the air-conditioning heat pump system flows along the second circulation loop, wherein the refrigerant flow path in the second circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the indoor heat exchanger (50), the first throttling device (40), the outdoor heat exchanger (30), and the inlet (11) of the compressor (10) in sequence, and at this time, the air-conditioning heat pump system is in a heating mode; The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant in the air-conditioning heat pump system flows along a third circulation loop, wherein the refrigerant flow path in the third circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the outdoor heat exchanger (30), the second throttling device (70), the heat storage device (60), and the inlet (11) of the compressor (10) in sequence, and at this time, the air-conditioning heat pump system is in a defrosting mode; and / or The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant in the air-conditioning heat pump system flows simultaneously along the third circulation loop and the fourth circulation loop, wherein the refrigerant flow path in the fourth circulation loop is that the refrigerant flows sequentially through the outlet (12) of the compressor (10), the outdoor heat exchanger (30), the second throttling device (70), the heat storage device (60), and the inlet (11) of the compressor (10); and the refrigerant flow path in the fourth circulation loop is that the refrigerant flows sequentially through the outlet (12) of the compressor (10), the indoor heat exchanger (50), the second throttling device (70), the heat storage device (60), and the inlet (11) of the compressor (10). At this time, the air-conditioning heat pump system is in a heating + defrosting mode.

8. The control method of the air conditioning heat pump system according to claim 7, characterized in that: The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant of the air-conditioning heat pump system flows simultaneously along the second circulation loop and the fifth circulation loop, wherein the refrigerant flow path in the fifth circulation loop is that the refrigerant flows sequentially through the outlet (12) of the compressor (10), the heat storage device (60), the first throttling device (40), the outdoor heat exchanger (30), and the inlet (11) of the compressor (10). At this time, the air-conditioning heat pump system is in a heating + heat storage mode.

9. The control method of the air conditioning heat pump system according to claim 7, characterized in that: The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant of the air-conditioning heat pump system flows along a sixth circulation loop, wherein the flow path of the refrigerant in the sixth circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the hot water heat exchanger (130), the indoor heat exchanger (50), the first throttling device (40), the outdoor heat exchanger (30), and the inlet (11) of the compressor (10) in sequence, and at this time, the air-conditioning heat pump system is in a heating + domestic hot water mode; and / or, The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant of the air-conditioning heat pump system flows along a seventh circulation loop, wherein the flow path of the refrigerant in the seventh circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the hot water heat exchanger (130), the outdoor heat exchanger (30), the first throttling device (40), the indoor heat exchanger (50), and the inlet (11) of the compressor (10) in sequence, and at this time, the air-conditioning heat pump system is in a refrigeration + partial heat recovery domestic hot water production mode; and / or, The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant of the air-conditioning heat pump system flows along an eighth circulation loop, wherein the flow path of the refrigerant in the eighth circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the hot water heat exchanger (130), the heat storage device (60), the first throttling device (40), the outdoor heat exchanger (30), and the inlet (11) of the compressor (10) in sequence, and at this time, the air-conditioning heat pump system is in a heat storage + domestic hot water production mode; and / or The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant of the air-conditioning heat pump system flows simultaneously along the eighth circulation loop and the ninth circulation loop, wherein the flow path of the refrigerant in the eighth circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the hot water heat exchanger (130), the heat storage device (60), the first throttling device (40), the outdoor heat exchanger (30), and the inlet (11) of the compressor (10) in sequence, and the flow path of the refrigerant in the ninth circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the hot water heat exchanger (130), the indoor heat exchanger (50), the first throttling device (40), the outdoor heat exchanger (30), and the inlet (11) of the compressor (10) in sequence. At this time, the air-conditioning heat pump system is in a heating + domestic hot water + heat storage mode.

10. The control method of the air conditioning heat pump system according to any one of claims 7 to 9, characterized in that: The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant of the air-conditioning heat pump system flows along a tenth circulation loop, wherein the flow path of the refrigerant in the tenth circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the hot water heat exchanger (130), the first throttling device (40), the indoor heat exchanger (50), and the inlet (11) of the compressor (10) in sequence, and at this time, the air-conditioning heat pump system is in a refrigeration + full heat recovery domestic hot water production mode; and / or, The four-way valve (20), the second throttling device (70), and the control component are controlled so that the refrigerant of the air-conditioning heat pump system flows along an eleventh circulation loop, wherein the flow path of the refrigerant in the eleventh circulation loop is that the refrigerant flows through the outlet (12) of the compressor (10), the hot water heat exchanger (130), the third throttling device (160), the outdoor heat exchanger (30), and the inlet (11) of the compressor (10) in sequence. At this time, the air-conditioning heat pump system is in a domestic hot water production mode.

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