Air conditioner heat pump system

Abstract

The utility model discloses a heat pump system of an air conditioner. 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 and a third control valve, and the air conditioner heat pump system has a refrigeration mode, a heating mode and a heating and defrosting mode. 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 among at least two modes of a refrigeration mode, a heating mode and a heating and defrosting mode. According to the air conditioner heat pump system, heating is not stopped during defrosting, and the use comfort of the air conditioner heat pump system can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field, specifically, relate to a kind of air conditioning heat pump system. BACKGROUND

[0002] The existing air conditioning heat pump system is defrosted in winter, and the air conditioning heat pump system is switched from heating mode to cooling mode. Thus, the indoor cooling mode affects the user experience in the room. SUMMARY

[0003] The main purpose of the present application is to provide an air conditioning heat pump system, which can realize continuous heating during defrosting and improve the comfort of the air conditioning heat pump system.

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

[0005] A refrigerant circulation main 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 inlet and an outlet. 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. The first valve port is connected to the outlet, the second valve port is connected to the first port, the third valve port is connected to the inlet, the fourth valve port is connected to the sixth port, the second port is connected to the third port, and the fourth port is connected to the fifth port.

[0006] It also includes a first bypass branch, which includes a heat storage device and a second throttling device. The heat storage device includes a seventh port and an eighth port. The seventh port is connected to the sixth port, and the eighth port is connected to the fourth valve port. The second throttling device is connected to the pipe between the seventh port and the sixth port.

[0007] A control assembly includes a first control valve, a second control valve, and a third control valve. The first control valve is arranged on the pipe between the sixth port and the fourth valve port. The second control valve is arranged on the pipe between the sixth port and the second throttling device. The third control valve includes a fifth valve port and a sixth valve port. The fifth valve port is connected to the pipe between the second port and the third port. The sixth valve port is connected to the pipe between the fourth port and the fifth port.

[0008] The air-conditioning heat pump system has a cooling mode, a heating mode and a heating + defrosting mode, and the four-way valve, the second throttling device and the control assembly are controlled to switch the air-conditioning heat pump system between at least any two modes of the cooling mode, the heating mode and the heating + defrosting mode.

[0009] Further, the second control valve is a three-way valve, the second control valve includes a seventh valve port, an eighth valve port and a ninth valve port, the seventh valve port and the sixth port are communicated through a pipeline, the eighth valve port and the second throttling device are communicated through a pipeline, and the ninth valve port is connected to the pipeline between the fourth port and the fifth port through a pipeline.

[0010] The air-conditioning heat pump system also has a defrosting mode, and the four-way valve, the second throttling device and the control assembly are controlled to switch the air-conditioning heat pump system between at least any two modes of the cooling mode, the heating mode, the heating + defrosting mode and the defrosting mode.

[0011] Further, the control assembly further includes a fourth control valve, the fourth control valve includes a tenth valve port and an eleventh valve port, the tenth valve port is connected to the pipeline between the second control valve and the second throttling device through a pipeline, and the eleventh valve port is connected to the pipeline between the second throttling device and the heat storage device through a pipeline.

[0012] The air-conditioning heat pump system also has a heating + heat storage mode, and the four-way valve, the second throttling device and the control assembly are controlled to switch the air-conditioning heat pump system between at least any two modes of the cooling mode, the heating mode, the heating + defrosting mode, the defrosting mode and the heating + heat storage mode.

[0013] 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 in the direction from the heat storage device to the second control valve; and / or,

[0014] The third control valve includes a two-way valve or a one-way valve, when the third control valve is a one-way valve, the one-way valve is conducted in the direction from the indoor heat exchanger to the outdoor heat exchanger.

[0015] Further, the air-conditioning heat pump system further includes a hot water heat exchanger, the hot water heat exchanger includes a ninth port and a tenth port.

[0016] The control assembly further comprises a first three-way valve, the first three-way valve comprises a twelfth valve port, a thirteenth valve port and a fourteenth valve port, the first three-way valve is arranged on a pipeline between the outlet and the first valve port, and the twelfth valve port and the outlet, the thirteenth valve port and the first valve port, and the fourteenth valve port and the ninth port are communicated through pipelines, and the tenth port is connected to the pipeline between the thirteenth valve port and the first valve port through a pipeline;

[0017] The air conditioning heat pump system further comprises a refrigeration + partial heat recovery hot water heating mode, a heating + hot water heating mode, a heat storage + hot water heating mode and a heating + hot water heating + heat storage mode, and at least any two modes among the refrigeration mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery hot water heating mode, the heating + hot water heating mode, the heat storage + hot water heating mode and the heating + hot water heating + heat storage mode are switched by controlling the four-way valve, the second throttling device and the control assembly.

[0018] Further, the control valve further comprises a second three-way valve, the second three-way valve comprises a fifteenth valve port, a sixteenth valve port and a seventeenth valve port, the second three-way valve is arranged on a pipeline between the tenth port and the first valve port, and the fifteenth valve port and the tenth port, and the sixteenth valve port and the first valve port are communicated through pipelines, and the seventeenth valve port is connected to the pipeline between the second port and the third port through a pipeline;

[0019] The air conditioning heat pump system further comprises a refrigeration + partial heat recovery hot water heating mode, a heating + hot water heating mode, a heat storage + hot water heating mode and a heating + hot water heating + heat storage mode, and at least any two modes among the refrigeration mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery hot water heating mode, the heating + hot water heating mode, the heat storage + hot water heating mode and the heating + hot water heating + heat storage mode are switched by controlling the four-way valve, the second throttling device and the control assembly.

[0020] Further, the air conditioning heat pump system further comprises a third throttling device, the third throttling device is arranged on a pipeline between the second port and the third port, and the third throttling device comprises an eleventh port and a twelfth port, the eleventh port and the second port, and the twelfth port and the seventeenth valve port are communicated through pipelines;

[0021] The control assembly further comprises a fifth control valve, the fifth control valve comprises an eighteenth valve port and a nineteenth valve port, the eighteenth valve port is connected to the pipeline between the twelfth port and the seventeenth valve port through a pipeline, and the nineteenth valve port is connected to the pipeline between the eleventh port and the second port through a pipeline;

[0022] The air conditioner heat pump system further comprises a hot water production mode, by controlling the four-way valve, the second throttling device and the control assembly, the air conditioner heat pump system is switched between any two modes of the refrigeration mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery 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 refrigeration + full heat recovery hot water production mode and the hot water production mode.

[0023] Further, the fifth control valve comprises a two-way valve or a one-way valve, when the fifth control valve is a one-way valve, the one-way valve is conducted in the direction from the outdoor heat exchanger to the first throttling device.

[0024] In the utility model, since the first bypass branch and the control assembly are arranged in the air conditioner heat pump system, when actually in use, by controlling the four-way valve, the second throttling device and the control assembly on the refrigerant circulation main loop, the air conditioner heat pump system can realize uninterrupted heating when defrosting, the comfort in the use process of the air conditioner heat pump system is improved, and the user experience is better. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings described herein are used to provide further understanding of the utility model and form part of the utility model, the illustrative embodiment of the utility model and the explanation thereof are used to explain the utility model, and do not constitute improper limitation to the utility model.In the drawings,

[0026] Figure 1 Part of the connection relationship diagram of the air conditioner heat pump system disclosed in the embodiment of the application is shown in the drawings;

[0027] Figure 2 Another part of the connection relationship diagram of the structure of the air conditioner heat pump system disclosed in the embodiment of the application is shown in the drawings;

[0028] Figure 3 The third part of the connection relationship diagram of the structure of the air conditioner heat pump system disclosed in the embodiment of the application is shown in the drawings;

[0029] Figure 4 The fourth part of the connection relationship diagram of the structure of the air conditioner heat pump system disclosed in the embodiment of the application is shown in the drawings;

[0030] Figure 5Connection relationship diagram of the fifth part structure of the air conditioner heat pump system disclosed by the embodiments of the present application;

[0031] Figure 6 Connection relationship diagram of the overall structure of the air conditioner heat pump system disclosed by the embodiments of the present application;

[0032] Figure 7 Connection relationship diagram of the overall structure of another alternative of the air conditioner heat pump system disclosed by the embodiments of the present application;

[0033] Figure 8 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a refrigeration mode;

[0034] Figure 9 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a heating mode;

[0035] Figure 10 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a heating + defrosting mode;

[0036] Figure 11 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a defrosting mode;

[0037] Figure 12 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a heating + heat storage mode;

[0038] Figure 13 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a refrigeration + partial heat recovery heating water mode;

[0039] Figure 14 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a heating + heating water mode;

[0040] Figure 15 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a heat storage + heating water mode;

[0041] Figure 16 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a heating + heat storage + heating water mode;

[0042] Figure 17 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a refrigeration + all heat recovery heating water mode;

[0043] Figure 18 Refrigerant flow direction diagram when the air conditioner heat pump system disclosed by the embodiments of the present application is in a heating water mode.

[0044] Wherein, the above-mentioned drawings include the following reference signs:

[0045] 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, seventh valve port; 92, eighth valve port; 93, ninth valve port; 100, third control valve; 101, fifth valve port; 102, sixth valve port; 110, fourth control valve; 111, tenth valve port; 112, eleventh valve port; 130, hot water heat exchanger; 131, ninth port; 132, tenth port; 140, first three-way valve; 141, twelfth valve port; 142, thirteenth valve port; 143, fourteenth valve port; 150, second three-way valve; 151, fifteenth valve port; 152, sixteenth valve port; 153, seventeenth valve port; 160, third throttling device; 161, eleventh port; 162, twelfth port; 170, fifth control valve; 171, eighteenth valve port; 172, nineteenth valve port. DETAILED DESCRIPTION

[0046] It should be noted that the embodiments and the features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0047] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component and / or combination thereof.

[0048] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0049] As described in the background section, existing air conditioning heat pump systems typically switch from heating mode to cooling mode during defrosting in winter. This keeps the indoor environment in cooling mode, negatively impacting the user experience. Therefore, this application provides a novel heat pump air conditioning system that continues heating during defrosting, improving user comfort. The air conditioning heat pump system of this application will be described in detail below with reference to the accompanying drawings.

[0050] See Figures 1 to 7 As shown, according to an embodiment of this application, an air conditioning heat pump system is provided. The air conditioning heat pump system includes a refrigerant circulation main circuit, a first bypass branch, and a control component.

[0051] like Figure 1 As shown, the refrigerant circulation main circuit 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 inlet 11 and an outlet 12. 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. The first valve port 21 is connected to the outlet 12; the second valve port 22 is connected to the first port 31; the third valve port 23 is connected to the inlet 11; the fourth valve port 24 is connected to the sixth port 52; the second port 32 is connected to the third port 41; and the fourth port 42 is connected to the fifth port 51, all connected via pipes. The first throttling device 40 includes a throttling expansion valve or a capillary tube, or other throttling element.

[0052] 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 is in communication with the sixth port 52 through a pipeline, and the eighth port 62 is in communication with the fourth valve port 24 through a pipeline. The second throttling device 70 is connected to the pipeline between the seventh port 61 and the sixth port 52. The second throttling device 70 includes a throttling element such as a throttling 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. The phase change heat storage plate is made by encapsulating a phase change material in a plate-shaped container. During heating of the air conditioning and heat pump system, the phase change material absorbs heat and changes phase (for example, from solid to liquid) to store heat. When heat is needed, the phase change material changes from liquid to solid to release heat. The phase change heat storage capsule is a structure in which a phase change material is wrapped in a small capsule, and then the capsules are filled in a specific container or pipeline for use. The phase change heat storage capsule can be flexibly arranged in the air conditioning system as needed, which can improve the heat storage density and stability of the system, and is suitable for some air conditioning and heat pump systems that have high space requirements and need to accurately control the temperature.

[0053] The control assembly includes a first control valve 80, a second control valve 90, and a third control valve 100. The first control valve 80 is arranged on the pipeline between the sixth port 52 and the fourth valve port 24. The second control valve 90 is arranged on the pipeline between the sixth port 52 and the second throttling device 70. The third control valve 100 includes a fifth valve port 101 and a sixth valve port 102. The fifth valve port 101 is in communication with the pipeline between the second port 32 and the third port 41 through a pipeline. The sixth valve port 102 is in communication with the pipeline between the fourth port 42 and the fifth port 51 through a pipeline.

[0054] The air conditioning and heat pump system in this embodiment has a cooling mode, a heating mode, and a heating + defrosting mode. By controlling the four-way valve 20, the second throttling device 70, and the control assembly, the air conditioning and heat pump system can be switched between at least any two modes of the cooling mode, the heating mode, and the heating + defrosting mode.

[0055] Specifically, as shown in FIG. 1, Figure 1 When it is needed to switch the air conditioning and heat pump system to the cooling mode, only the first control valve 80 needs to be controlled to be open, the first valve port 21 and the second valve port 22 of the four-way valve 20 are made to be conductive, the third valve port 23 and the fourth valve port 24 are made to be conductive, and the other valves in the air conditioning and heat pump system are all controlled to be closed. As shown in FIG. 1, Figure 8As shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 is condensed and released heat in the outdoor heat exchanger 30 to become medium-temperature and medium-pressure liquid refrigerant, which is expanded and evaporated by the first throttling device 40 to become low-temperature and low-pressure liquid refrigerant or gaseous-liquid mixed state, and then enters the indoor heat exchanger 50. The refrigerant is evaporated and absorbs heat in the indoor heat exchanger 50 to become low-temperature and low-pressure gaseous refrigerant, which 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 and heat pump system completes the circulation in the cooling mode.

[0056] In combination Figure 1 As shown, when it is needed to switch the air conditioning and heat pump system to the heating mode, only the first control valve 80 needs to be controlled to be opened, and the first valve port 21 and the fourth valve port 24 of the four-way valve 20 are communicated, the second valve port 22 and the third valve port 23 are communicated, and the other valves in the air conditioning and heat pump system are all controlled to be closed. As shown, Figure 9 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 to be condensed and released heat, to become medium-temperature and medium-pressure liquid refrigerant, which is expanded and evaporated by the first throttling device 40 to become low-temperature and low-pressure liquid refrigerant or gaseous-liquid mixed state, and then the refrigerant further enters the outdoor heat exchanger 30, is evaporated and absorbs heat in the outdoor heat exchanger 30 to become 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 and heat pump system completes the circulation in the heating mode.

[0057] In combination Figure 1 As shown, when it is needed to switch the air conditioning and heat pump system to the heating + defrosting mode, only the second control valve 90 and the third control valve 100 need to be controlled to be opened, and the first valve port 21 and the second valve port 22 of the four-way valve 20 are communicated, the third valve port 23 and the fourth valve port 24 are communicated, the second throttling device 70 is controlled to be in the throttling state, and the other valves in the air conditioning and heat pump system are all controlled to be closed. As shown, 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 to defrost the outdoor heat exchanger 30, and then the refrigerant further enters the indoor heat exchanger 50 through the third control valve 100, is further condensed and released heat in the indoor heat exchanger 50 to perform heating, and is expanded and evaporated by the second control valve 90 and the second throttling device 70 to become low-temperature and low-pressure liquid refrigerant or gaseous-liquid mixed state, enters the heat storage device 60 to be evaporated and absorb heat to become 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 and heat pump system completes the circulation in the heating + defrosting mode.

[0058] It can be seen that, due to the first bypass branch and the control assembly arranged in the air-conditioning heat pump system in the embodiment, in actual use, by controlling the four-way valve 20, the second throttling device 70 and the control assembly on the refrigerant circulation main loop, the air-conditioning heat pump system can realize uninterrupted heating during defrosting, and the comfort during use of the air-conditioning heat pump system can be improved, and the user experience is better. Further, in combination with Figure 2 As shown in

[0059] In the embodiment, by arranging the second control valve 90 as a three-way valve, when the air-conditioning heat pump system is working, the air-conditioning heat pump system also has a defrosting mode, and in use, by controlling the four-way valve 20, the second throttling device 70 and the control assembly, the air-conditioning heat pump system can be switched between at least any two modes of the cooling mode, the heating mode, the heating + defrosting mode and the defrosting mode.

[0060] Specifically, referring to Figure 2 As shown, when it is needed to switch the air-conditioning heat pump system to the defrosting mode, only the third control valve 100 is controlled to be opened, the ninth valve port 93 and the eighth valve port 92 of the second control valve 90 are controlled to be conductive, the first valve port 21 and the second valve port 22 of the four-way valve 20 are controlled to be conductive, the third valve port 23 and the fourth valve port 24 of the four-way valve 20 are controlled to be conductive, the second throttling device 70 is controlled to be in a throttling state, and other valves in the air-conditioning heat pump system are controlled to be all closed. As shown in Figure 11 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 to defrost the outdoor heat exchanger 30, and the refrigerant becomes liquid refrigerant at medium temperature and medium pressure. The liquid refrigerant passes through the third control valve 100 and the second control valve 90 and enters the second throttling device 70, expands to a low-temperature and low-pressure liquid-gas mixed state, and then enters the heat storage device 60 to evaporate and absorb heat, becomes low-temperature and low-pressure gaseous refrigerant, and then flows back to the compressor 10 from the inlet 11 of the compressor 10. The entire air-conditioning heat pump system completes the cycle of the defrosting mode.

[0061] In combination with Figure 3 As shown, the control assembly in the embodiment further includes a fourth control valve 110, which includes a tenth valve port 111 and an eleventh valve port 112. The tenth valve port 111 is connected by a pipeline to the pipeline between the second control valve 90 and the second throttling device 70, and the eleventh valve port 112 is connected by a pipeline to the pipeline between the second throttling device 70 and the heat storage device 60.

[0062] The air-conditioning heat pump system in the embodiment also has a heating+storage mode. The four-way valve 20, the second throttling device 70, and the control assembly are controlled to switch the air-conditioning heat pump system between at least any two of the cooling mode, the heating mode, the heating+defrosting mode, the defrosting mode, and the heating+storage mode. It should be noted that the second throttling device 70 in the embodiment is a throttling device with adjustable throttling opening. When the air-conditioning heat pump system is in the heating+storage mode, the second throttling device 70 can be in a fully open mode. At this time, the second throttling device 70 does not have a throttling effect. Of course, the fourth control valve 110 can be controlled instead of controlling the opening and closing state of the second throttling device 70 so that the air-conditioning heat pump system can circulate in the heating+storage mode.

[0063] Specifically, as shown in Figure 3 When it is needed to switch the air-conditioning heat pump system to the heating+storage mode, the first control valve 80 is controlled to be opened, the ninth valve port 93 and the eighth valve port 92 of the second control valve 90 are controlled to be communicated, the first valve port 21 and the fourth valve port 24 of the four-way valve 20 are controlled to be communicated, the third valve port 23 and the second valve port 22 of the four-way valve 20 are controlled to be communicated, the second throttling device 70 is controlled to be fully open and / or the fourth control valve 110 is controlled to be opened, and the other valves in the air-conditioning heat pump system are controlled to be all closed. As shown in Figure 12 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 storage device 60, respectively. The gaseous refrigerant entering the indoor heat exchanger 50 releases heat to heat and becomes liquid refrigerant at medium temperature and medium pressure, and then flows into the first throttling device 40 to expand and become low-temperature and low-pressure liquid or gaseous refrigerant, and then enters the outdoor heat exchanger 30 to absorb heat and become low-temperature and low-pressure gaseous refrigerant, and then flows back to the compressor 10. The refrigerant entering the storage device 60 releases heat in the storage device 60 and is stored in the storage device 60 to become liquid refrigerant at medium temperature and medium pressure. At this time, the entire air-conditioning heat pump system completes the heating+storage mode cycle.

[0064] As shown in Figure 3 and Figure 7 The first control valve 80 in the embodiment is a two-way valve or other form of on-off valve, and at least one of the third control valve 100 and the fourth control valve 110 can be provided as a two-way valve or a one-way valve.

[0065] When the third control valve 100 is set as a one-way valve, the one-way valve is conducted in the direction from the indoor heat exchanger 50 to the outdoor heat exchanger 30. In the present application, by setting the third control valve 100 as a one-way valve, the production manufacturing cost of the air conditioning heat pump system can be reduced. Compared with the structure that the third control valve 100 is set as a two-way valve, when designing the control logic of the air conditioning heat pump system, in some control modes (for example, the heating + heat storage mode) of the air conditioning heat pump system, the opening and closing timing of the third control valve 100 does not need to be considered, and the control logic of the air conditioning heat pump system can be simplified. When the third control valve 100 is set as a one-way valve, when the heating + defrosting mode is performed, the first throttling device 40 is usually set as an electronic expansion valve with adjustable opening degree, and at this time, the first throttling device 40 is in a fully open state.

[0066] Similarly, when the fourth control valve 110 is a one-way valve, the one-way valve is conducted in the direction from the heat storage device 60 to the second control valve 90. In the present application, by setting the fourth control valve 110 as a one-way valve, the production manufacturing cost of the air conditioning heat pump system can be reduced. Compared with the structure that the fourth control valve 110 is set as a two-way valve, when designing the control logic of the air conditioning heat pump system, in some control modes (for example, the heating + heat storage mode) of the air conditioning heat pump system, the opening and closing timing of the fourth control valve 110 does not need to be considered, and the control logic of the air conditioning heat pump system can be simplified.

[0067] Referring to Figure 4 As shown in the figure, the air conditioning heat pump system in the embodiment further comprises a hot water heat exchanger 130, the hot water heat exchanger 130 comprising a ninth port 131 and a tenth port 132; and the control assembly further comprises a first three-way valve 140, the first three-way valve 140 comprising a twelfth valve port 141, a thirteenth valve port 142 and a fourteenth valve port 143, the first three-way valve 140 being arranged on the pipeline between the outlet 12 and the first valve port 21, and the twelfth valve port 141 and the outlet 12, the thirteenth valve port 142 and the first valve port 21, and the fourteenth valve port 143 and the ninth port 131 are all communicated through the pipeline, and the tenth port 132 is connected to the pipeline between the thirteenth valve port 142 and the first valve port 21 through the pipeline.

[0068] The air conditioning heat pump system in the embodiment further comprises a refrigeration + partial heat recovery hot water heating mode, a heating + hot water heating mode, a heat storage + hot water heating mode, and a heating + hot water heating + heat storage mode, and by controlling the four-way valve 20, the second throttling device 70 and the control assembly, the air conditioning heat pump system is switched between at least any two modes of the refrigeration mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery hot water heating mode, the heating + hot water heating mode, the heat storage + hot water heating mode, and the heating + hot water heating + heat storage mode.

[0069] Referring toFigure 4 As shown, when it is needed to switch the air conditioning heat pump system to the cooling + partial heat recovery hot water heating mode, only the first control valve 80 needs to be controlled to be opened, the twelfth valve port 141 and the fourteenth valve port 143 of the first three-way valve 140 need to be controlled to be communicated, the first valve port 21 and the second valve port 22 of the four-way valve 20 need to be controlled to be communicated, the third valve port 23 and the fourth valve port 24 of the four-way valve 20 need to be controlled to be communicated, and at the same time, other valves in the air conditioning heat pump system need to be controlled to be all closed. As shown, Figure 13 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 first three-way valve 140, the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure gaseous refrigerant, then enters the outdoor heat exchanger 30 through the four-way valve 20 to become medium-temperature and medium-pressure liquid refrigerant, the medium-temperature and medium-pressure liquid refrigerant is throttled and expanded into low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state through the first throttling device 40, then enters the indoor heat exchanger 50 to absorb heat and evaporate to cool, then becomes low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 10 through the four-way valve 20, completing the cycle of the cooling + partial heat recovery hot water heating mode of the air conditioning heat pump system.

[0070] As shown, Figure 4 As shown, when it is needed to switch the air conditioning heat pump system to the cooling + partial heat recovery hot water heating mode, only the first control valve 80 needs to be controlled to be opened, the twelfth valve port 141 and the fourteenth valve port 143 of the first three-way valve 140 need to be controlled to be communicated, the first valve port 21 and the second valve port 22 of the four-way valve 20 need to be controlled to be communicated, the third valve port 23 and the fourth valve port 24 of the four-way valve 20 need to be controlled to be communicated, and at the same time, other valves in the air conditioning heat pump system need to be controlled to be all closed. As shown, Figure 14 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 first three-way valve 140, the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure gaseous refrigerant, then enters the indoor heat exchanger 50 through the four-way valve 20 to condense and heat, then becomes medium-temperature and medium-pressure liquid refrigerant, the medium-temperature and medium-pressure liquid refrigerant is throttled and expanded into low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state through the first throttling device 40, then enters the outdoor heat exchanger 30 to absorb heat and evaporate to become low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 10 through the four-way valve 20, completing the cycle of the cooling + partial heat recovery hot water heating mode of the air conditioning heat pump system.

[0071] As shown, Figure 4As shown, when the air conditioning heat pump system needs to be switched to the heat storage + hot water production mode, it is only necessary to connect the ninth valve port 93 and the eighth valve port 92 of the second control valve 90, connect the first valve port 21 and the fourth valve port 24 of the four-way valve 20, and connect the third valve port 23 and the second valve port 22. Simultaneously, the second throttling device 70 is fully opened and / or the fourth control valve 110 is opened, and all other valves in the air conditioning heat pump system are closed. 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 first three-way valve 140. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130, turning it into a medium-temperature and medium-pressure gaseous refrigerant. Then, it enters the heat storage device 60 through the four-way valve 20 to store heat and becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant expands through the first throttling device 40 to become a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture. Then, it enters the outdoor heat exchanger 30 to absorb heat and evaporate, turning it into 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 + hot water production mode of the air conditioning heat pump system.

[0072] See Figure 4 As shown, when the air conditioning heat pump system needs to be switched to heating + heat storage + hot water mode, it is only necessary to control the first control valve 80 to open, simultaneously control the ninth valve port 93 and the eighth valve port 92 of the second control valve 90 to be connected, the first valve port 21 and the fourth valve port 24 of the four-way valve 20 to be connected, and the third valve port 23 and the second valve port 22 to be connected. At the same time, the second throttling device 70 should be fully opened and / or the fourth control valve 110 should be opened, and all other valves in the air conditioning heat pump system should be closed. Figure 16As 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 first three-way valve 140, and the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure gaseous refrigerant, and then is divided into two paths through the four-way valve 20 and flows into the heat storage device 60 and the indoor heat exchanger 50, respectively. Among them, 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 to become low-temperature and low-pressure liquid refrigerant, and the low-temperature and low-pressure liquid refrigerant is throttled and expanded into low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state through the first throttling device 40, and then enters the outdoor heat exchanger 30 to absorb heat and evaporate to become 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 is condensed and releases heat in the indoor heat exchanger 50 to heat, and then becomes medium-temperature and medium-pressure liquid refrigerant, which is throttled and expanded into low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state through the first throttling device 40, and then enters the outdoor heat exchanger 30 to absorb heat and evaporate to become low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 10 through the four-way valve 20, completing the cycle of the heating + heat storage + hot water mode of the air conditioning heat pump system.

[0073] Referring to Figure 5 As shown, the control valve in the embodiment further includes a second three-way valve 150, which includes a fifteenth valve port 151, a sixteenth valve port 152, and a seventeenth valve port 153. The second three-way valve 150 is arranged on the pipeline between the tenth port 132 and the first valve port 21, and the fifteenth valve port 151 and the tenth port 132 and the sixteenth valve port 152 and the first valve port 21 are both communicated through the pipeline. The seventeenth valve port 153 is connected to the pipeline between the second port 32 and the third port 41 through the pipeline.

[0074] The air conditioning heat pump system in the embodiment further includes a refrigeration + all heat recovery hot water mode. The four-way valve 20, the second throttling device 70, and the control assembly are controlled to switch between at least any two modes of the refrigeration mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery hot water mode, the heating + hot water mode, the heat storage + hot water mode, the heating + hot water + heat storage mode, and the refrigeration + all heat recovery hot water mode.

[0075] Referring to Figure 5As shown, when it is required to switch the air conditioning heat pump system to the refrigeration + all heat recovery hot water heating mode, only the first control valve 80 needs to be controlled to be opened, the twelfth valve port 141 and the fourteenth valve port 143 of the first three-way valve 140 are controlled to be communicated, the fifteenth valve port 151 and the seventeenth valve port 153 of the second three-way valve 150 are controlled to be communicated, the third valve port 23 and the fourth valve port 24 of the four-way valve 20 are controlled to be communicated, and the other valves in the air conditioning heat pump system are controlled to be all closed. As shown in 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 first three-way valve 140, the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure liquid refrigerant, and then expands to become low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state through the first throttling device 40, and then enters the indoor heat exchanger 50 to absorb heat and evaporate to refrigerate, and becomes low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 10 through the four-way valve 20, and finally completes the refrigeration + all heat recovery hot water heating mode cycle of the air conditioning heat pump system. Among them, all heat recovery refers to that the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 changes phase in the hot water heat exchanger 130, releases latent heat of phase change, and the heat of the refrigerant is all recovered in the hot water heat exchanger 130.

[0076] As shown in Figure 6 As shown, the air conditioning heat pump system further comprises a third throttling device 160, the third throttling device 160 is arranged on the pipeline between the second port 32 and the third port 41, and the third throttling device 160 comprises an eleventh port 161 and a twelfth port 162, the eleventh port 161 and the second port 32 are communicated through the pipeline, and the twelfth port 162 and the seventeenth valve port 153 are communicated through the pipeline. The control assembly in the embodiment further comprises a fifth control valve 170, the fifth control valve 170 comprises an eighteenth valve port 171 and a nineteenth valve port 172, the eighteenth valve port 171 is connected to the pipeline between the twelfth port 162 and the seventeenth valve port 153 through the pipeline, and the nineteenth valve port 172 is connected to the pipeline between the eleventh port 161 and the second port 32 through the pipeline.

[0077] The air conditioning heat pump system in the embodiment further comprises a hot water heating mode, at least any two modes between the refrigeration mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery hot water heating mode, the heating + hot water heating mode, the heat storage + hot water heating mode, the heating + hot water heating + heat storage mode, the refrigeration + all heat recovery hot water heating mode, and the hot water heating mode of the air conditioning heat pump system are switched by controlling the four-way valve 20, the second throttling device 70 and the control assembly.

[0078] As shown in Figure 6As shown, when it is required to switch the air-conditioning heat pump system to the hot water heating mode, only the twelfth valve port 141 and the fourteenth valve port 143 of the first three-way valve 140 are controlled to be open, the fifteenth valve port 151 and the seventeenth valve port 153 of the second three-way valve 150 are controlled to be open, the third valve port 23 and the second valve port 22 of the four-way valve 20 are controlled to be open, and the other valves in the air-conditioning heat pump system are controlled to be closed. As shown in FIG. 2B, 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 first three-way valve 140, the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure liquid refrigerant, and then the medium-temperature and medium-pressure liquid refrigerant is throttled and expanded into low-temperature and low-pressure liquid refrigerant or gaseous-liquid mixed state through the third throttling device 160, and then the low-temperature and low-pressure gaseous refrigerant is evaporated and absorbs heat in the outdoor heat exchanger 30, and finally the low-temperature and low-pressure gaseous refrigerant flows into the compressor 10 through the four-way valve 20, and finally the low-temperature and low-pressure gaseous refrigerant flows into the compressor 10 through the four-way valve 20, completing the circulation of the hot water heating mode of the air-conditioning heat pump system. Figure 18 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 first three-way valve 140, the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure liquid refrigerant, and then the medium-temperature and medium-pressure liquid refrigerant is throttled and expanded into low-temperature and low-pressure liquid refrigerant or gaseous-liquid mixed state through the third throttling device 160, and then the low-temperature and low-pressure gaseous refrigerant is evaporated and absorbs heat in the outdoor heat exchanger 30, and finally the low-temperature and low-pressure gaseous refrigerant flows into the compressor 10 through the four-way valve 20, and finally the low-temperature and low-pressure gaseous refrigerant flows into the compressor 10 through the four-way valve 20, completing the circulation of the hot water heating mode of the air-conditioning heat pump system.

[0079] As shown in FIG. 1A, the fifth control valve 170 is connected between the outlet 32 of the outdoor heat exchanger 30 and the inlet 41 of the first throttling device 40. Figure 6 As shown in FIG. 1A, the fifth control valve 170 is connected between the outlet 32 of the outdoor heat exchanger 30 and the inlet 41 of the first throttling device 40. Figure 7 As shown in FIG. 1A, the fifth control valve 170 is connected between the outlet 32 of the outdoor heat exchanger 30 and the inlet 41 of the first throttling device 40.

[0080] As shown in FIG. 1A, the fifth control valve 170 is connected between the outlet 32 of the outdoor heat exchanger 30 and the inlet 41 of the first throttling device 40. Figures 1 to 18 As shown in FIG. 1A, the fifth control valve 170 is connected between the outlet 32 of the outdoor heat exchanger 30 and the inlet 41 of the first throttling device 40.

[0081] Specifically, the air-conditioning heat pump system in the embodiment has a refrigeration mode, a heating mode, a heating + defrosting mode, a defrosting mode, a heating + heat storage mode, a refrigeration + partial heat recovery hot water heating mode, a heating + hot water heating mode, a heat storage + hot water heating mode, a heating + hot water heating + heat storage mode, a refrigeration + full heat recovery hot water heating mode, and a hot water heating mode.

[0082] The control valve controls the four-way valve 20, the second throttling device 70, and the control components, enabling the air conditioning heat pump system to switch between at least two of the following modes: cooling mode, heating mode, heating + defrosting mode, defrosting mode, heating + heat storage mode, cooling + partial heat recovery for hot water mode, heating + hot water mode, heat storage + hot water mode, heating + hot water + heat storage mode, cooling + full heat recovery for hot water mode, and hot water mode.

[0083] Specifically, see Figure 8 As shown, when the air conditioning heat pump system needs to be switched to cooling mode, it is only necessary to control the first control valve 80 to open, and make the first valve port 21 of the four-way valve 20 connected to the second valve port 22, the third valve port 23 connected to the fourth valve port 24, and control the other valves in the air conditioning heat pump system so that the refrigerant of the air conditioning heat pump system flows along the first circulation loop. 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. During this process, 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, becoming a medium-temperature and medium-pressure liquid refrigerant. This liquid refrigerant is throttled and expanded through the first throttling device 40, becoming a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture. Then it enters the indoor heat exchanger 50, where the refrigerant absorbs heat and evaporates, becoming a low-temperature and low-pressure gaseous refrigerant. After flowing through the first control valve 80, it flows back into the compressor 10 from the inlet 11, and the entire air conditioning heat pump system completes the cooling mode cycle.

[0084] See Figure 9 As shown, when the air conditioning heat pump system needs to be switched to heating mode, it is only necessary to control the first control valve 80 to open, and make the first valve port 21 and the fourth valve port 24 of the four-way valve 20 connected, the second valve port 22 and the third valve port 23 connected, and control the other valves in the air conditioning heat pump system so that the refrigerant of the air conditioning heat pump system flows along the second circulation loop. 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. During this process, 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, becoming a medium-temperature and medium-pressure liquid refrigerant. This liquid refrigerant expands through the first throttling device 40 and becomes a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture. The refrigerant further enters the outdoor heat exchanger 30, where it absorbs heat and evaporates, becoming a low-temperature and low-pressure gaseous refrigerant. Afterward, it flows back into 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.

[0085] Referring to Figure 10 As shown, when it is needed to switch the air-conditioning heat pump system to the heating + defrosting mode, only the second control valve 90 and the third control valve 100 need to be controlled to be opened, and the first valve port 21 and the second valve port 22 of the four-way valve 20 are communicated, the third valve port 23 and the fourth valve port 24 of the four-way valve 20 are communicated, the second throttling device 70 is controlled to be in the throttling state, and other valves in the air-conditioning heat pump system are controlled, so that the refrigerant in the air-conditioning heat pump system flows along the 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 indoor heat exchanger 50, the second throttling device 70, the heat storage device 60, and the outlet 12 of the compressor 10 in sequence. In this process, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the outdoor heat exchanger 30 to defrost the outdoor heat exchanger 30, and then the refrigerant enters the indoor heat exchanger 50 through the third control valve 100, and further condenses and releases heat in the indoor heat exchanger 50 to heat, and the refrigerant becomes low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state after throttling and expansion through the second control valve 90 and the second throttling device 70, and enters the heat storage device 60 to evaporate and absorb heat, and becomes low-temperature and low-pressure gaseous refrigerant, and then flows back to the compressor 10 from the inlet 11 of the compressor 10, and the entire air-conditioning heat pump system completes the circulation of the heating + defrosting mode.

[0086] Referring to Figure 11 As shown, when it is needed to switch the air-conditioning heat pump system to the heating + defrosting mode, only the second control valve 90 and the third control valve 100 need to be controlled to be opened, and the first valve port 21 and the second valve port 22 of the four-way valve 20 are communicated, the third valve port 23 and the fourth valve port 24 of the four-way valve 20 are communicated, the second throttling device 70 is controlled to be in the throttling state, and other valves in the air-conditioning heat pump system are controlled, so that the refrigerant in the air-conditioning heat pump system flows along the 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 indoor heat exchanger 50, the second throttling device 70, the heat storage device 60, and the outlet 12 of the compressor 10 in sequence. In this process, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet 12 of the compressor 10 enters the outdoor heat exchanger 30 to defrost the outdoor heat exchanger 30, and then the refrigerant enters the indoor heat exchanger 50 through the third control valve 100, and further condenses and releases heat in the indoor heat exchanger 50 to heat, and the refrigerant becomes low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state after throttling and expansion through the second control valve 90 and the second throttling device 70, and enters the heat storage device 60 to evaporate and absorb heat, and becomes low-temperature and low-pressure gaseous refrigerant, and then flows back to the compressor 10 from the inlet 11 of the compressor 10, and the entire air-conditioning heat pump system completes the circulation of the heating + defrosting mode.

[0087] Referring to Figure 12As shown, when it is needed to switch the air conditioning heat pump system to the heating + heat storage mode, only the first control valve 80 needs to be opened, the ninth valve port 93 and the eighth valve port 92 of the second control valve 90 are controlled to be communicated, the first valve port 21 and the fourth valve port 24 of the four-way valve 20 are controlled to be communicated, the third valve port 23 and the second valve port 22 of the four-way valve 20 are controlled to be communicated, the second throttling device 70 is controlled to be fully opened and / or the fourth control valve 110 is controlled to be opened, and other valves in the air conditioning heat pump system are controlled, so that the refrigerant in the air conditioning heat pump system flows along the second circulation loop and the fifth circulation loop at the same time, wherein the flow path of the refrigerant 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 inlet 11 of the compressor 10 in sequence. In this process, 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 in two paths respectively. Among them, the gaseous refrigerant entering the indoor heat exchanger 50 releases heat to heat and becomes medium-temperature and medium-pressure liquid refrigerant, and then flows into the first throttling device 40 to expand and become low-temperature and low-pressure liquid or gas-liquid mixed refrigerant, and then enters the outdoor heat exchanger 30 to absorb heat and become low-temperature and low-pressure gaseous refrigerant, and then flows back 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 to become medium-temperature and medium-pressure liquid refrigerant, and then flows into the first throttling device 40 to expand and become low-temperature and low-pressure liquid or gas-liquid mixed refrigerant, and then enters the outdoor heat exchanger 30 to absorb heat and become low-temperature and low-pressure gaseous refrigerant, and then flows back to the compressor 10. At this time, the entire air conditioning heat pump system completes the heating + heat storage mode circulation.

[0088] Referring to Figure 13As shown, when the air conditioning heat pump system needs to be switched to a cooling + partial heat recovery hot water mode, it is only necessary to control the opening of the first control valve 80, connect the twelfth valve port 141 and the fourteenth valve port 143 of the first three-way valve 140, and connect the first valve port 21 and the second valve port 22, and the third valve port 23 and the fourth valve port 24 of the four-way valve 20. Simultaneously, other valves in the air conditioning heat pump system are controlled to allow the refrigerant to flow along the sixth circulation loop. The refrigerant flow path in the sixth circulation loop is as follows: the refrigerant flows sequentially through the compressor 10 outlet 12, the hot water heat exchanger 130, the outdoor heat exchanger 30, the first throttling device 40, the indoor heat exchanger 50, and the compressor 10 inlet 11. During the process, 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 first three-way valve 140. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130, turning it into 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 expands through the first throttling device 40 and becomes a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture. Then, it enters the indoor heat exchanger 50 to absorb heat and evaporate for cooling. After that, it becomes a low-temperature and low-pressure gaseous refrigerant and finally flows into the compressor 10 through the four-way valve 20, completing the cycle of the air conditioning heat pump system's cooling + partial heat recovery to produce hot water mode.

[0089] See Figure 14 As shown, when the air conditioning heat pump system needs to be switched to heating + hot water mode, it is only necessary to control the first control valve 80 to open, control the twelfth valve port 141 and the fourteenth valve port 143 of the first three-way valve 140 to connect, and control the first valve port 21 and the fourth valve port 24 of the four-way valve 20 to connect, and the second valve port 22 and the third valve port 23 to connect. At the same time, other valves in the air conditioning heat pump system are controlled so that the refrigerant of the air conditioning heat pump system flows along the seventh circulation loop. 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 indoor heat exchanger 50, the first throttling device 40, the outdoor heat exchanger 30, and the inlet 11 of the compressor 10 in sequence. During this process, 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 first three-way valve 140. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat to heat the water in the hot water heat exchanger 130, turning it into a medium-temperature and medium-pressure gaseous refrigerant. Then, it enters the indoor heat exchanger 50 through the four-way valve 20, condenses and heats the water, and then becomes a medium-temperature and medium-pressure liquid refrigerant. The medium-temperature and medium-pressure liquid refrigerant expands through the first throttling device 40, becoming a low-temperature and low-pressure liquid refrigerant or a gas-liquid mixture. Then, it enters the outdoor heat exchanger 30 to absorb heat and evaporate, turning into 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 + hot water production mode of the air conditioning heat pump system.

[0090] Referring to Figure 15 As shown, when it is required to switch the air conditioning heat pump system to the heat storage + hot water production mode, only the ninth valve port 93 of the second control valve 90 and the eighth valve port 92 are communicated, the first valve port 21 and the fourth valve port 24 of the four-way valve 20 are communicated, the third valve port 23 and the second valve port 22 of the four-way valve 20 are communicated, the second throttling device 70 is controlled to be fully opened and / or the fourth control valve 110 is controlled to be opened, and other valves in the air conditioning heat pump system are controlled, so that the refrigerant in the air conditioning heat pump system flows along the eighth circulation loop. In the eighth circulation loop, the flow path of the refrigerant 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. In this process, 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 first three-way valve 140, and the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure gaseous refrigerant. Then, the medium-temperature and medium-pressure gaseous refrigerant enters the heat storage device 60 through the four-way valve 20 to be heat stored and becomes low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant is throttled and expanded into low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state by the first throttling device 40, and then enters the outdoor heat exchanger 30 to be heated and evaporated to become low-temperature and low-pressure gaseous refrigerant. Finally, the low-temperature and low-pressure gaseous refrigerant flows into the compressor 10 through the four-way valve 20, and the circulation of the air conditioning heat pump system in the heat storage + hot water production mode is completed.

[0091] Referring to Figure 16As shown, when it is needed to switch the air conditioning heat pump system to the heating + heat storage + hot water mode, only the first control valve 80 needs to be controlled to be opened, the ninth valve port 93 and the eighth valve port 92 of the second control valve 90 are controlled to be communicated, the first valve port 21 and the fourth valve port 24 of the four-way valve 20 are controlled to be communicated, the third valve port 23 and the second valve port 22 of the four-way valve 20 are controlled to be communicated, the second throttling device 70 is controlled to be fully opened and / or the fourth control valve 110 is controlled to be opened, and other valves in the air conditioning heat pump system are controlled, so that the refrigerant in the air conditioning heat pump system flows along the eighth circulation loop and the ninth circulation loop. In the ninth circulation loop, the flow path of the refrigerant 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. In this process, 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 first three-way valve 140, and the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure gaseous refrigerant. After passing through the four-way valve 20, the medium-temperature and medium-pressure gaseous refrigerant is divided into two paths and flows into the heat storage device 60 and the indoor heat exchanger 50, respectively. 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, and then becomes low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant is throttled and expanded by the first throttling device 40 to become low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state, and then enters the outdoor heat exchanger 30 to absorb heat and evaporate to become 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 releases heat in the indoor heat exchanger 50 to heat, and then becomes medium-temperature and medium-pressure liquid refrigerant. The liquid refrigerant is throttled and expanded by the first throttling device 40 to become low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state, and then enters the outdoor heat exchanger 30 to absorb heat and evaporate to become low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 10 through the four-way valve 20, completing the circulation of the air conditioning heat pump system in the heating + heat storage + hot water mode.

[0092] Referring to Figure 17As shown, when it is needed to switch the air conditioning heat pump system to the refrigeration + all heat recovery hot water heating mode, only the first control valve 80 needs to be controlled to be opened, the twelfth valve port 141 and the fourteenth valve port 143 of the first three-way valve 140 are controlled to be communicated, the fifteenth valve port 151 and the seventeenth valve port 153 of the second three-way valve 150 are controlled to be communicated, the third valve port 23 and the fourth valve port 24 of the four-way valve 20 are controlled to be communicated, and other valves in the air conditioning heat pump system are controlled, so that the refrigerant in the air conditioning heat pump system flows along the tenth circulation loop. In the tenth circulation loop, 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. In this process, 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 first three-way valve 140, and the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure liquid refrigerant, and then expands to become low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state through the first throttling device 40, and then enters the indoor heat exchanger 50 to absorb heat and evaporate to become low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 10 through the four-way valve 20, and finally completes the circulation of the air conditioning heat pump system in the refrigeration + all heat recovery hot water heating mode.

[0093] Referring to Figure 18 As shown, when it is needed to switch the air conditioning heat pump system to the refrigeration + all heat recovery hot water heating mode, only the first control valve 80 needs to be controlled to be opened, the twelfth valve port 141 and the fourteenth valve port 143 of the first three-way valve 140 are controlled to be communicated, the fifteenth valve port 151 and the seventeenth valve port 153 of the second three-way valve 150 are controlled to be communicated, the third valve port 23 and the fourth valve port 24 of the four-way valve 20 are controlled to be communicated, and other valves in the air conditioning heat pump system are controlled, so that the refrigerant in the air conditioning heat pump system flows along the tenth circulation loop. In the tenth circulation loop, 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. In this process, 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 first three-way valve 140, and the high-temperature and high-pressure gaseous refrigerant is condensed and releases heat to heat the water in the hot water heat exchanger 130 to become medium-temperature and medium-pressure liquid refrigerant, and then expands to become low-temperature and low-pressure liquid refrigerant or gas-liquid mixed state through the first throttling device 40, and then enters the indoor heat exchanger 50 to absorb heat and evaporate to become low-temperature and low-pressure gaseous refrigerant, and finally flows into the compressor 10 through the four-way valve 20, and finally completes the circulation of the air conditioning heat pump system in the refrigeration + all heat recovery hot water heating mode.

[0094] According to the above-mentioned embodiments, it can be known that the air conditioning heat pump system of the present application has at least the following technical effects:

[0095] (1) The heat storage device in the application is arranged so that heat storage can be performed for the heat storage device while heating (or when hot water is produced) and the refrigerant can be heated by the heat storage device when the system is defrosting, thereby defrosting and simultaneously realizing indoor heating, realizing uninterrupted heating during defrosting, and thereby improving the user experience.

[0096] (2) The air-conditioning heat pump system of the application can realize free switching of 11 modes, and the system is more flexible.

[0097] (3) The air-conditioning heat pump system of the application realizes 11 modes by three sets of check valves + throttling devices, which can replace three two-way valves, is low in cost, and is easier to control.

[0098] For the convenience of description, spatial relative terms such as "above", "upper", "top surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. Thus, the example term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0099] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the protective scope of the utility model.

[0100] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protective scope of the utility model.

Claims

1. An air conditioning and heat pump system, comprising: a refrigerant circulation main circuit including 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) including an inlet (11) and an outlet (12), the outdoor heat exchanger (30) including a first port (31) and a second port (32), the first throttling device (40) including a third port (41) and a fourth port (42), the indoor heat exchanger (50) including a fifth port (51) and a sixth port (52), the four-way valve (20) including a first valve port (21), a second valve port (22), a third valve port (23), and a fourth valve port (24), the first valve port (21) and the outlet (12), 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) being communicated by pipes; characterized in that it further comprises a first bypass branch including a heat storage device (60) and a second throttling device (70), the heat storage device (60) including 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) being communicated by pipes, the second throttling device (70) being connected to the pipe between the seventh port (61) and the sixth port (52); a control assembly including a first control valve (80), a second control valve (90), and a third control valve (100), the first control valve (80) being provided on the pipe between the sixth port (52) and the fourth valve port (24), the second control valve (90) being provided on the pipe between the sixth port (52) and the second throttling device (70), the third control valve (100) including a fifth valve port (101) and a sixth valve port (102), the fifth valve port (101) being communicated by a pipe with the pipe between the second port (32) and the third port (41), and the sixth valve port (102) being communicated by a pipe with the pipe between the fourth port (42) and the fifth port (51); wherein the air conditioning and heat pump system has a cooling mode, a heating mode, and a heating + defrosting mode, and the air conditioning and heat pump system is switched between at least any two modes of the cooling mode, the heating mode, and the heating + defrosting mode by controlling the four-way valve (20), the second throttling device (70), and the control assembly.

2. The air conditioning and heat pump system of claim 1, wherein, The second control valve (90) is a three-way valve, the second control valve (90) comprises a seventh valve port (91), an eighth valve port (92) and a ninth valve port (93), the seventh valve port (91) and the sixth port (52) are communicated through a pipeline, the eighth valve port (92) and the second throttling device (70) are communicated through a pipeline, the ninth valve port (93) is connected to the pipeline between the fourth port (42) and the fifth port (51) through a pipeline; The air conditioning heat pump system also has a defrosting mode, by controlling the four-way valve (20), the second throttling device (70) and the control assembly, so that the air conditioning heat pump system switches between at least any two modes of the refrigeration mode, the heating mode, the heating+defrosting mode and the defrosting mode.

3. The air conditioning and heat pump system of claim 2, wherein, The control assembly further comprises a fourth control valve (110), the fourth control valve (110) comprises a tenth valve port (111) and an eleventh valve port (112), the tenth valve port (111) is connected to the pipeline between the second control valve (90) and the second throttling device (70) through a pipeline, and the eleventh valve port (112) is connected to the pipeline between the second throttling device (70) and the heat storage device (60) through a pipeline; The air conditioning heat pump system also has a heating+heat storage mode, by controlling the four-way valve (20), the second throttling device (70) and the control assembly, so that the air conditioning heat pump system switches between at least any two modes of the refrigeration mode, the heating mode, the heating+defrosting mode, the defrosting mode and the heating+heat storage mode.

4. The air conditioning and heat pump system of claim 3, wherein, The fourth control valve (110) comprises a two-way valve or a one-way valve, when the fourth control valve (110) is a one-way valve, the one-way valve is conducted in the direction from the heat storage device (60) to the second control valve (90); and / or, The third control valve (100) comprises a two-way valve or a one-way valve, when the third control valve (100) is a one-way valve, the one-way valve is conducted in the direction from the indoor heat exchanger (50) to the outdoor heat exchanger (30).

5. The air conditioning heat pump system of any one of claims 1 to 4, wherein, The air conditioning heat pump system further comprises a hot water heat exchanger (130), the hot water heat exchanger (130) comprises a ninth port (131) and a tenth port (132); The control assembly further comprises a first three-way valve (140), the first three-way valve (140) comprises a twelfth valve port (141), a thirteenth valve port (142) and a fourteenth valve port (143), the first three-way valve (140) is arranged on the pipeline between the outlet (12) and the first valve port (21), and the twelfth valve port (141) and the outlet (12) are communicated through a pipeline, the thirteenth valve port (142) and the first valve port (21) are communicated through a pipeline, and the fourteenth valve port (143) and the ninth port (131) are communicated through a pipeline, and the tenth port (132) is connected to the pipeline between the thirteenth valve port (142) and the first valve port (21) through a pipeline; The air conditioning heat pump system further comprises a refrigeration + partial heat recovery hot water heating mode, a heating + hot water heating mode, a heat storage + hot water heating mode, and a heating + hot water heating + heat storage mode, and the air conditioning heat pump system is switched between at least any two modes of the refrigeration mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery hot water heating mode, the heating + hot water heating mode, the heat storage + hot water heating mode, and the heating + hot water heating + heat storage mode by controlling the four-way valve (20), the second throttling device (70), and the control assembly.

6. The air conditioning and heat pump system of claim 5, wherein, The control valve further comprises a second three-way valve (150), the second three-way valve (150) comprises a fifteenth valve port (151), a sixteenth valve port (152), and a seventeenth valve port (153), the second three-way valve (150) is arranged on a pipeline between the tenth port (132) and the first valve port (21), and the fifteenth valve port (151) and the tenth port (132) are in communication through a pipeline, the sixteenth valve port (152) and the first valve port (21) are in communication through a pipeline, and the seventeenth valve port (153) is connected to a pipeline between the second port (32) and the third port (41) through a pipeline; The air conditioning heat pump system further comprises a refrigeration + partial heat recovery hot water heating mode, a heating + hot water heating mode, a heat storage + hot water heating mode, and a heating + hot water heating + heat storage mode, and the air conditioning heat pump system is switched between at least any two modes of the refrigeration mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the refrigeration + partial heat recovery hot water heating mode, the heating + hot water heating mode, the heat storage + hot water heating mode, and the heating + hot water heating + heat storage mode by controlling the four-way valve (20), the second throttling device (70), and the control assembly.

7. The air conditioning and heat pump system of claim 6, wherein, The air conditioning heat pump system further comprises a third throttling device (160), the third throttling device (160) is arranged on a pipeline between the second port (32) and the third port (41), and the third throttling device (160) comprises an eleventh port (161) and a twelfth port (162), the eleventh port (161) and the second port (32) are in communication through a pipeline, and the twelfth port (162) and the seventeenth valve port (153) are in communication through a pipeline; The control assembly further comprises a fifth control valve (170), the fifth control valve (170) comprises an eighteenth valve port (171) and a nineteenth valve port (172), the eighteenth valve port (171) is connected to a pipeline between the twelfth port (162) and the seventeenth valve port (153) through a pipeline, and the nineteenth valve port (172) is connected to a pipeline between the eleventh port (161) and the second port (32) through a pipeline; The air conditioning heat pump system further comprises a hot water production mode, by controlling the four-way valve (20), the second throttling device (70) and the control assembly, so that the air conditioning heat pump system switches between any two modes of the cooling mode, the heating mode, the heating + defrosting mode, the defrosting mode, the heating + heat storage mode, the cooling + partial heat recovery 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 hot water production mode and the hot water production mode.

8. The air conditioning and heat pump system of claim 7, wherein, The fifth control valve (170) comprises a two-way valve or a one-way valve, when the fifth control valve (170) is a one-way valve, the one-way valve is conducted in the direction from the outdoor heat exchanger (30) to the first throttling device (40).

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