Hot water heat pump system

Abstract

The utility model discloses a hot water heat pump system which comprises a compressor, a domestic hot water heat exchanger, an air pipe, a liquid pipe, at least two groups of indoor units, at least two groups of first refrigerant flow adjusting devices, an outdoor side heat exchanger and an economic module used for reducing the temperature of refrigerant entering the outdoor side heat exchanger. The domestic hot water heat exchanger comprises a refrigerant inlet and a refrigerant outlet. The indoor unit comprises a first refrigerant port and a second refrigerant port. The outdoor heat exchanger comprises a third refrigerant port and a fourth refrigerant port. The refrigerant inlet is connected with an outlet of the compressor, and the refrigerant outlet is connected with a main interface end of the air pipe; in each group, the first refrigerant port is connected with the corresponding branch connector end in the air pipe, and the second refrigerant port is connected with the corresponding branch connector end in the liquid pipe through a first refrigerant flow adjusting device. The main interface end of the liquid pipe is connected with the first end of the economic module, and the second end of the economic module is connected with the third refrigerant port; and the fourth refrigerant port is connected with an inlet of the compressor. Combination of the multi-split system and domestic hot water is achieved, and the heating effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a hot water heat pump system. Background Art

[0002] In the related art, the Tianfu hot water heat pump system realizes the combination of the multi-connected system and domestic hot water. In cold winter, when the hot water heat pump system is in the heating plus domestic hot water mode, it is easily affected by the adverse outdoor low temperature environment, affecting the heating effect. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a hot water heat pump system for at least one defect existing in the related art mentioned in the above background art: when the hot water heat pump system is in the heating plus domestic hot water mode, it is easily affected by the adverse outdoor low temperature environment, affecting the heating effect.

[0004] The technical solution adopted by the utility model to solve its technical problem is: to construct a hot water heat pump system, including:

[0005] A compressor for compressing refrigerant;

[0006] A domestic hot water heat exchanger including a refrigerant inlet and a refrigerant outlet communicating with the refrigerant inlet;

[0007] An air pipe and a liquid pipe;

[0008] At least two groups of indoor units and a first refrigerant flow regulating device, the indoor unit including a first refrigerant port and a second refrigerant port communicating with the first refrigerant port;

[0009] An outdoor heat exchanger including a third refrigerant port and a fourth refrigerant port communicating with the third refrigerant port; and,

[0010] An economy module for reducing the temperature of the refrigerant entering the outdoor heat exchanger;

[0011] Wherein, the refrigerant inlet is connected to the outlet of the compressor, and the refrigerant outlet is connected to the total interface end of the air pipe;

[0012] In each group of the indoor units and the first refrigerant flow regulating device, the first refrigerant port is connected to the corresponding branch interface end in the air pipe, and the second refrigerant port is connected to the corresponding branch interface end in the liquid pipe through the first refrigerant flow regulating device;

[0013] The total interface end of the liquid pipe is connected to the first end of the economy module, and the second end of the economy module is connected to the third refrigerant port;

[0014] The fourth refrigerant port is connected to the inlet of the compressor.

[0015] In one embodiment, the economizer module includes an economizer and a second refrigerant flow regulating device;

[0016] The economizer includes a fifth refrigerant port, a sixth refrigerant port, a seventh refrigerant port communicating with the fifth refrigerant port, and an eighth refrigerant port communicating with the sixth refrigerant port;

[0017] Wherein, the second end of the economizer module is the seventh refrigerant port; the first end of the economizer module is divided into two paths, one path is sequentially connected to the third refrigerant port through the fifth refrigerant port and the seventh refrigerant port, and the other path is sequentially connected to the inlet of the compressor through the second refrigerant flow regulating device, the sixth refrigerant port and the eighth refrigerant port.

[0018] In one embodiment, the hot water heat pump system further includes:

[0019] A liquid storage container, and the total interface end of the liquid pipe is connected to the first end of the economizer module through the liquid storage container.

[0020] In one embodiment, the hot water heat pump system further includes:

[0021] A gas pipe switch valve and a liquid pipe switch valve, the gas pipe switch valve is arranged at the total interface end of the gas pipe, and the liquid pipe switch valve is arranged at the total interface end of the liquid pipe.

[0022] In one embodiment, the refrigerant outlet is further connected to the first end of the economizer module; and / or,

[0023] The refrigerant outlet is further connected to the total interface end of the liquid pipe and / or the fourth refrigerant port, and the total interface end of the gas pipe is further connected to the inlet of the compressor.

[0024] In one embodiment, the hot water heat pump system further includes:

[0025] A first reversing valve, the first reversing valve includes a first valve port, a second valve port, a third valve port and a fourth valve port;

[0026] The first valve port is connected to the refrigerant outlet; the second valve port is connected to the fourth refrigerant port; the third valve port is connected to the inlet of the compressor; the fourth valve port is connected to the total interface end of the gas pipe;

[0027] Wherein, when the refrigerant outlet is communicated with the total interface end of the air pipe through the first valve port and the fourth valve port, and the fourth refrigerant port is communicated with the inlet of the compressor through the second valve port and the third valve port, after the refrigerant comes out of the compressor, it passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the fourth valve port, the air pipe, the first refrigerant port, the second refrigerant port, the first refrigerant flow regulating device, the liquid pipe, the economizer module, the third refrigerant port, the fourth refrigerant port, the second valve port and the third valve port to form a heating refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger;

[0028] When the refrigerant outlet is communicated with the fourth refrigerant port through the first valve port and the second valve port, and the total interface end of the air pipe is communicated with the inlet of the compressor through the fourth valve port and the third valve port, after the refrigerant comes out of the compressor, it passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the second valve port, the fourth refrigerant port, the third refrigerant port, the economizer module, the liquid pipe, the first refrigerant flow regulating device, the second refrigerant port, the first refrigerant port, the air pipe, the fourth valve port and the third valve port to form a refrigerating refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger.

[0029] In one embodiment, the hot water heat pump system further includes:

[0030] A second reversing valve, which includes a fifth valve port, a sixth valve port and a seventh valve port;

[0031] The fifth valve port is connected to the refrigerant outlet; the sixth valve port is connected to the total interface end of the liquid pipe and the first end of the economizer module; the seventh valve port is connected to the total interface end of the air pipe, or the seventh valve port is connected to the fourth refrigerant port;

[0032] Wherein, when the refrigerant outlet is communicated with the total interface end of the liquid pipe through the fifth valve port and the sixth valve port, and the total interface end of the air pipe is communicated with the inlet of the compressor, after the refrigerant comes out of the compressor, it passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the sixth valve port, the liquid pipe, the first refrigerant flow regulating device, the second refrigerant port, the first refrigerant port and the air pipe to form a refrigerating refrigerant circuit, and at the same time, all the heat of the refrigerant is exchanged in the domestic hot water heat exchanger;

[0033] When the refrigerant outlet is communicated with the fourth refrigerant port through the fifth valve port and the seventh valve port, and the total interface end of the air pipe is communicated with the inlet of the compressor, after the refrigerant comes out of the compressor, it passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the seventh valve port, the fourth refrigerant port, the third refrigerant port, the economizer module, the liquid pipe, the first refrigerant flow regulating device, the second refrigerant port, the first refrigerant port and the air pipe to form a refrigerating refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger;

[0034] When the refrigerant outlet is communicated with the total interface end of the air pipe through the fifth valve port and the seventh valve port, and the fourth refrigerant port is communicated with the inlet of the compressor, after the refrigerant comes out of the compressor, it passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the seventh valve port, the air pipe, the first refrigerant port, the second refrigerant port, the first refrigerant flow regulating device, the liquid pipe, the economizer module, the third refrigerant port and the fourth refrigerant port to form a heating refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger;

[0035] When the refrigerant outlet is communicated with the first end of the economizer module through the fifth valve port and the sixth valve port, and the fourth refrigerant port is communicated with the inlet of the compressor, after the refrigerant comes out of the compressor, it passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the sixth valve port, the economizer module, the third refrigerant port and the fourth refrigerant port to form a pure hot water refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger.

[0036] In one embodiment, the hot water heat pump system further includes:

[0037] A third reversing valve, which includes an eighth valve port, a ninth valve port and a tenth valve port;

[0038] The eighth valve port is connected to the outlet of the compressor; the ninth valve port is connected to the refrigerant inlet; the tenth valve port is connected to the total interface end of the air pipe, or the tenth valve port is connected to the fourth refrigerant port;

[0039] Wherein, the outlet of the compressor is communicated with the refrigerant inlet through the eighth valve port and the ninth valve port; and / or,

[0040] The outlet of the compressor is communicated with the total interface end of the air pipe or the fourth refrigerant port through the eighth valve port and the tenth valve port.

[0041] In one embodiment, the hot water heat pump system further includes:

[0042] A third refrigerant flow regulating device, the second end of the economizer module is connected to the third refrigerant port through the third refrigerant flow regulating device; and,

[0043] A first check valve, the third refrigerant port is also connected to the second end of the economizer module through the first check valve, and the conduction direction of the first check valve faces the second end of the economizer module.

[0044] In one embodiment, the domestic hot water heat exchanger further includes a first water inlet and a first water outlet communicating with the first water inlet;

[0045] The hot water heat pump system further includes:

[0046] A domestic water tank, the domestic water tank is respectively connected to the first water inlet and the first water outlet.

[0047] By implementing the present utility model, the following beneficial effects are achieved:

[0048] Through the parallel connection of the gas pipe and the liquid pipe of the present utility model, the combination of the multi-connected system and domestic hot water is realized. At the same time, the temperature of the refrigerant entering the outdoor heat exchanger can be reduced through the economizer module, thereby improving the heat absorption performance of the outdoor heat exchanger in a low-temperature environment and enhancing the subsequent heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0050] Figure 1 is a schematic diagram of the hot water heat pump system of the present utility model;

[0051] Figure 2 is a schematic diagram of the refrigerant flow direction for preparing hot water in the full heat recovery mode while the hot water heat pump system of the present utility model is refrigerating;

[0052] Figure 3 is a schematic diagram of the first refrigerant flow direction for preparing hot water in the waste heat recovery mode while the hot water heat pump system of the present utility model is refrigerating;

[0053] Figure 4 is a schematic diagram of the second refrigerant flow direction for preparing hot water in the waste heat recovery mode while the hot water heat pump system of the present utility model is refrigerating;

[0054] Figure 5 is a schematic diagram of the first refrigerant flow direction for preparing hot water while the hot water heat pump system of the present utility model is heating;

[0055] Figure 6 It is a schematic diagram of the flow direction of the second refrigerant for preparing hot water while the hot water heat pump system of the present utility model is heating;

[0056] Figure 7 It is a schematic diagram of the refrigerant flow direction when the hot water heat pump system of the present utility model is only preparing hot water;

[0057] Figure 8 It is a schematic diagram of the refrigerant flow direction when the hot water heat pump system of the present utility model is in the refrigeration mode;

[0058] Figure 9 It is a schematic diagram of the refrigerant flow direction when the hot water heat pump system of the present utility model is in the heating mode. Detailed implementation manners

[0059] In order to have a clearer understanding of the technical features, objectives and effects of the present utility model, the detailed implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings.

[0060] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0061] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0062] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "provided in", "located in" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, a chemical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0063] Such as Figure 1As shown, some embodiments of the present utility model disclose a hot water heat pump system, including a compressor 11, a domestic hot water heat exchanger 12, an air pipe 13, a liquid pipe 14, at least two groups of indoor units 15 and a first refrigerant flow rate regulating device 16, an outdoor heat exchanger 17 and an economizer module. It can be understood that at least two groups can be two groups, three groups or any number, specifically as follows:

[0064] The compressor 11 is used to compress the refrigerant, and the compressor 11 includes an inlet 111 and an outlet 112. The domestic hot water heat exchanger 12 is used to realize the heat exchange between the refrigerant and the water in the domestic water tank 25, and the domestic hot water heat exchanger 12 includes a refrigerant inlet 121 and a refrigerant outlet 122 connected to the refrigerant inlet 121.

[0065] The air pipe 13 and the liquid pipe 14 each include a main interface and at least two sub-interfaces. It can be understood that at least two can be two, three or any number. One sub-interface of the air pipe 13 and one sub-interface of the liquid pipe 14 correspond to a group of the indoor units 15 and the first refrigerant flow rate regulating device 16. The indoor unit 15 is used to realize the heat exchange between the refrigerant and the indoor air, and the indoor unit 15 includes a first refrigerant port 151 and a second refrigerant port 152 connected to the first refrigerant port 151.

[0066] The outdoor heat exchanger 17 is used to realize the heat exchange between the refrigerant and the outside air, and the outdoor heat exchanger 17 includes a third refrigerant port 171 and a fourth refrigerant port 172 connected to the third refrigerant port 171.

[0067] The economizer module is used to reduce the temperature of the refrigerant entering the outdoor heat exchanger 17.

[0068] Among them, the refrigerant inlet 121 is connected to the outlet 112 of the compressor 11, and the refrigerant outlet 122 is connected to the main interface end of the air pipe 13.

[0069] In each group of the indoor units 15 and the first refrigerant flow rate regulating device 16, the first refrigerant port 151 is connected to the corresponding sub-interface end in the air pipe 13, and the second refrigerant port 152 is connected to the corresponding sub-interface end in the liquid pipe 14 through the first refrigerant flow rate regulating device 16.

[0070] The main interface end of the liquid pipe 14 is connected to the first end of the economizer module, the second end of the economizer module is connected to the third refrigerant port 171, and the fourth refrigerant port 172 is connected to the inlet 111 of the compressor 11.

[0071] Specifically, in the heating plus domestic hot water mode, the total interface end of the refrigerant outlet 122 and the gas pipe 13 is connected and communicated, the fourth refrigerant port 172 is connected and communicated with the inlet 111 of the compressor 11, and after coming out of the compressor 11, the refrigerant passes through the refrigerant inlet 121, the refrigerant outlet 122, the gas pipe 13, the first refrigerant port 151, the second refrigerant port 152, the first refrigerant flow regulating device 16, the liquid pipe 14, the economizer module, the third refrigerant port 171 and the fourth refrigerant port 172 to form a heating refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0072] For example, the domestic hot water heat exchanger 12 is a shell-and-tube heat exchanger, the outdoor heat exchanger 17 is a finned heat exchanger, and the first refrigerant flow regulating device 16 is an electronic expansion valve or a thermostatic expansion valve. The indoor unit 15 is a ducted air conditioner, which includes an indoor heat exchanger (such as a finned heat exchanger) and a fan. The indoor heat exchanger is used to realize the heat exchange between the refrigerant and the indoor air. The indoor heat exchanger includes the first refrigerant port 151 and the second refrigerant port 152. The fan is used to drive the indoor air to exchange heat with the refrigerant in the indoor heat exchanger. Here, the shell-and-tube heat exchanger, the finned heat exchanger, the electronic expansion valve, the thermostatic expansion valve and the ducted air conditioner are only examples and do not limit the present application.

[0073] In this embodiment, through the parallel-connected gas pipe 13 and liquid pipe 14, the combination of the multi-connected air-conditioning system and domestic hot water is realized. At the same time, the economizer module can reduce the temperature of the refrigerant entering the outdoor heat exchanger 17, thereby improving the heat absorption performance of the outdoor heat exchanger 17 in a low-temperature environment and enhancing the subsequent heating effect.

[0074] In some embodiments, the economizer module includes an economizer 18 and a second refrigerant flow regulating device 19. The economizer 18 includes a fifth refrigerant port 181, a sixth refrigerant port 182, a seventh refrigerant port 183 connected and communicated with the fifth refrigerant port 181, and an eighth refrigerant port 184 connected and communicated with the sixth refrigerant port 182. For example, the economizer 18 is a heat exchanger, and the second refrigerant flow regulating device 19 is an electronic expansion valve or a thermostatic expansion valve. Here, the electronic expansion valve and the thermostatic expansion valve are only examples and do not limit the present application.

[0075] Wherein, the second end of the economic module is the seventh refrigerant port 183. The first end of the economic module is divided into two paths. One path is sequentially connected to the third refrigerant port 171 through the fifth refrigerant port 181 and the seventh refrigerant port 183. The other path is sequentially connected to the inlet 111 of the compressor 11 through the second refrigerant flow regulating device 19, the sixth refrigerant port 182 and the eighth refrigerant port 184.

[0076] In this embodiment, by adding the economic module at the outlet of the condenser (such as the indoor unit 15), the refrigerant coming out of the condenser passes through the main refrigerant path and the auxiliary refrigerant path respectively. The refrigerant in the auxiliary refrigerant path is throttled and cooled by the second refrigerant flow regulating device 19, and then can more efficiently absorb the refrigerant heat from the main refrigerant path in the economizer 18, making the temperature of the refrigerant entering the outdoor heat exchanger 17 lower. Especially in cold winter, the temperature of the refrigerant can be lower than the outdoor temperature, thereby improving the heat absorption performance of the outdoor heat exchanger 17 in a low-temperature environment and enhancing the subsequent heating effect.

[0077] In some embodiments, the hot water heat pump system further includes a liquid storage container 20. The total interface end of the liquid pipe 14 is connected to the first end of the economic module through the liquid storage container 20. Specifically, the total interface end of the liquid pipe 14 is connected to the first interface 201 of the liquid storage container 20, and the second interface 202 of the liquid storage container 20 is connected to the first end of the economic module.

[0078] In some embodiments, the hot water heat pump system further includes a gas pipe switch valve 21 and a liquid pipe switch valve 22. The gas pipe switch valve 21 is arranged at the total interface end of the gas pipe 13, and the liquid pipe switch valve 22 is arranged at the total interface end of the liquid pipe 14. Specifically, the first end of the liquid pipe switch valve 22 is connected to the first end of the economic module (specifically, connected to the first end of the economic module through the liquid storage container 20), and the second end of the liquid pipe switch valve 22 is connected to the total interface end of the liquid pipe 14. The first end of the gas pipe switch valve 21 is connected to the refrigerant outlet 122, and the second end of the gas pipe switch valve 21 is connected to the total interface end of the gas pipe 13. For example, the gas pipe switch valve 21 and the liquid pipe switch valve 22 are globe valves or solenoid valves. The globe valves and solenoid valves here are only examples and do not limit the present application.

[0079] In some embodiments, the refrigerant outlet 122 is further connected to the first end of the economizer module. Specifically, in the pure hot water mode, the refrigerant outlet 122 is in communication with the first end of the economizer module, the fourth refrigerant port 172 is in communication with the inlet 111 of the compressor 11, and the refrigerant forms a pure hot water refrigerant circuit after coming out of the compressor 11 through the refrigerant inlet 121, the refrigerant outlet 122, the economizer module, the third refrigerant port 171, and the fourth refrigerant port 172. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0080] This embodiment can realize the automatic switching between hot water production during heating and pure hot water production, further improving the flexibility in different modes.

[0081] In some embodiments, the refrigerant outlet 122 is further connected to the total interface end of the liquid pipe 14 (specifically, the first end of the liquid pipe switch valve 22) and / or the fourth refrigerant port 172, and the total interface end of the gas pipe 13 is further connected to the inlet 111 of the compressor 11.

[0082] Specifically, in the refrigeration and full heat recovery for domestic hot water production mode, the refrigerant outlet 122 is in communication with the total interface end of the liquid pipe 14, the total interface end of the gas pipe 13 is in communication with the inlet 111 of the compressor 11, and the refrigerant forms a refrigeration refrigerant circuit after coming out of the compressor 11 through the refrigerant inlet 121, the refrigerant outlet 122, the liquid pipe 14, the first refrigerant flow regulating device 16, the second refrigerant port 152, the first refrigerant port 151, and the gas pipe 13. At the same time, all the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0083] In the refrigeration and waste heat recovery (also called partial heat recovery) for domestic hot water production mode, the refrigerant outlet 122 is in communication with the fourth refrigerant port 172, the total interface end of the gas pipe 13 is in communication with the inlet 111 of the compressor 11, and the refrigerant forms a refrigeration refrigerant circuit after coming out of the compressor 11 through the refrigerant inlet 121, the refrigerant outlet 122, the fourth refrigerant port 172, the third refrigerant port 171, the economizer module, the liquid pipe 14, the first refrigerant flow regulating device 16, the second refrigerant port 152, the first refrigerant port 151, and the gas pipe 13. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0084] In some embodiments, the hot water heat pump system further includes a first reversing valve 23, which is used to switch between the refrigeration mode and the heating mode. The first reversing valve 23 includes a first valve port 231, a second valve port 232, a third valve port 233, and a fourth valve port 234. For example, the first reversing valve 23 is a four-way valve. The four-way valve here is only an example and does not limit the present application.

[0085] The first valve port 231 is connected to the refrigerant outlet 122; the second valve port 232 is connected to the fourth refrigerant port 172; the third valve port 233 is connected to the inlet 111 of the compressor 11; the fourth valve port 234 is connected to the total interface end of the gas pipe 13 (specifically, the first end of the gas pipe switch valve 21).

[0086] Among them, when the refrigerant outlet 122 is connected to the total interface end of the gas pipe 13 through the first valve port 231 and the fourth valve port 234, and the fourth refrigerant port 172 is connected to the inlet 111 of the compressor 11 through the second valve port 232 and the third valve port 233, that is, in the heating plus domestic hot water mode, the refrigerant comes out of the compressor 11 and then passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 231, the fourth valve port 234, the gas pipe 13, the first refrigerant port 151, the second refrigerant port 152, the first refrigerant flow regulating device 16, the liquid pipe 14, the economy module, the third refrigerant port 171, the fourth refrigerant port 172, the second valve port 232, and the third valve port 233 to form a heating refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0087] When the refrigerant outlet 122 is connected to the fourth refrigerant port 172 through the first valve port 231 and the second valve port 232, and the total interface end of the gas pipe 13 is connected to the inlet 111 of the compressor 11 through the fourth valve port 234 and the third valve port 233, that is, in the refrigeration and waste heat recovery for domestic hot water mode, the refrigerant comes out of the compressor 11 and then passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 231, the second valve port 232, the fourth refrigerant port 172, the third refrigerant port 171, the economy module, the liquid pipe 14, the first refrigerant flow regulating device 16, the second refrigerant port 152, the first refrigerant port 151, the gas pipe 13, the fourth valve port 234, and the third valve port 233 to form a refrigeration refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0088] In some embodiments, the hot water heat pump system further includes a second reversing valve 24, which is used to switch all or at least part of the heat of the refrigerant to exchange heat in the domestic hot water heat exchanger 12. The second reversing valve 24 includes a fifth valve port 241, a sixth valve port 242 and a seventh valve port 243. For example, the second reversing valve 24 is a three-way valve. The three-way valve here is only an example and does not limit the present application.

[0089] The fifth valve port 241 is connected to the refrigerant outlet 122; the sixth valve port 242 is connected to the total interface end of the liquid pipe 14 (specifically, the first end of the liquid pipe switch valve 22) and the first end of the economizer module; the seventh valve port 243 is connected to the total interface end of the gas pipe 13 (specifically, the first end of the gas pipe switch valve 21), or the seventh valve port 243 (specifically, the seventh valve port 243 passes through the first reversing valve 23) is connected to the fourth refrigerant port 172.

[0090] Wherein, when the refrigerant outlet 122 is communicated with the total interface end of the liquid pipe 14 through the fifth valve port 241 and the sixth valve port 242, and the total interface end of the gas pipe 13 is communicated with the inlet 111 of the compressor 11, that is, in the refrigeration and full heat recovery domestic hot water mode, the refrigerant comes out of the compressor 11 and then passes through the refrigerant inlet 121, the refrigerant outlet 122, the fifth valve port 241, the sixth valve port 242, the liquid pipe 14, the first refrigerant flow regulating device 16, the second refrigerant port 152, the first refrigerant port 151 and the gas pipe 13 to form a refrigeration refrigerant circuit. At the same time, all the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0091] When the refrigerant outlet 122 is communicated with the fourth refrigerant port 172 through the fifth valve port 241 and the seventh valve port 243, and the total interface end of the gas pipe 13 is communicated with the inlet 111 of the compressor 11, that is, in the refrigeration and waste heat recovery domestic hot water mode, the refrigerant comes out of the compressor 11 and then passes through the refrigerant inlet 121, the refrigerant outlet 122, the fifth valve port 241, the seventh valve port 243, the fourth refrigerant port 172, the third refrigerant port 171, the economizer module, the liquid pipe 14, the first refrigerant flow regulating device 16, the second refrigerant port 152, the first refrigerant port 151 and the gas pipe 13 to form a refrigeration refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0092] The refrigerant outlet 122 is communicated with the total interface end of the air pipe 13 through the fifth valve port 241 and the seventh valve port 243. When the fourth refrigerant port 172 is communicated with the inlet 111 of the compressor 11, that is, in the heating plus domestic hot water mode, after the refrigerant comes out of the compressor 11, it passes through the refrigerant inlet 121, the refrigerant outlet 122, the fifth valve port 241, the seventh valve port 243, the air pipe 13, the first refrigerant port 151, the second refrigerant port 152, the first refrigerant flow regulating device 16, the liquid pipe 14, the economizer module, the third refrigerant port 171 and the fourth refrigerant port 172 to form a heating refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0093] The refrigerant outlet 122 is communicated with the first end of the economizer module through the fifth valve port 241 and the sixth valve port 242. When the fourth refrigerant port 172 is communicated with the inlet 111 of the compressor 11, that is, in the pure hot water mode, after the refrigerant comes out of the compressor 11, it passes through the refrigerant inlet 121, the refrigerant outlet 122, the fifth valve port 241, the sixth valve port 242, the economizer module, the third refrigerant port 171 and the fourth refrigerant port 172 to form a pure hot water refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12 to prepare hot water.

[0094] In this embodiment, the second reversing valve 24 can realize the automatic switching between full heat recovery and partial heat recovery during refrigeration, improving the flexibility in different modes, so as to ensure both the heat recovery capacity and the hot water temperature of heat recovery.

[0095] In some embodiments, the domestic hot water heat exchanger 12 further includes a first water inlet 123 and a first water outlet 124 communicated with the first water inlet 123. The hot water heat pump system further includes a domestic water tank 25, and the domestic water tank 25 is respectively connected with the first water inlet 123 and the first water outlet 124.

[0096] All or at least part of the heat of the refrigerant output by the compressor 11 is exchanged with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12 to prepare hot water. Specifically, the domestic water tank 25 includes a cold water inlet 251, a water outlet 252, a water return port 253 and a hot water outlet 254. The water outlet 252 is connected with the first water inlet 123, and the first water outlet 124 is connected with the water return port 253.

[0097] In some embodiments, the hot water heat pump system further includes a hot water pump 26, which is disposed on the inlet pipeline (the pipeline connecting the water outlet 252 and the first water inlet 123) or the outlet pipeline (the pipeline connecting the first water outlet 124 and the water return port 253) of the domestic hot water heat exchanger 12. The hot water pump 26 is used to provide power for the water circulation between the domestic hot water heat exchanger 12 and the domestic water tank 25.

[0098] Specifically, when preparing hot water while refrigerating, if the initial water temperature is 30°C and the target temperature is to be heated to 60°C, the waste heat recovery mode can be adopted, but the hot water production speed is slow. Therefore, in order to solve the problems of slow hot water production speed and affecting the commutation of the second commutation valve 24 in the refrigeration and waste heat recovery modes, a full heat recovery mode is provided. All the heat of the refrigerant output by the compressor 11 is exchanged with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12, which can increase the hot water production speed and quickly prepare hot water. When the water temperature reaches a preset value (for example, 50°C), at this time, since the temperature difference between the refrigerant and the water is small, the waste heat recovery mode can be switched. If the initial water temperature is 50°C and the target temperature is to be heated to 60°C, the waste heat recovery mode can be directly adopted. It should be noted that the above-listed temperature data are only for illustrative purposes and do not limit the present application.

[0099] In some embodiments, the hot water heat pump system further includes a third commutation valve 27, which is used to regulate the amount of refrigerant entering the domestic hot water heat exchanger 12 from the compressor 11. The third commutation valve 27 includes an eighth valve port 271, a ninth valve port 272, and a tenth valve port 273. For example, the third commutation valve 27 is a three-way valve. The three-way valve here is only an example and does not limit the present application.

[0100] The eighth valve port 271 is connected to the outlet 112 of the compressor 11; the ninth valve port 272 is connected to the refrigerant inlet 121; the tenth valve port 273 (specifically, the tenth valve port 273 passes through the first commutation valve 23) is connected to the total interface end of the air pipe 13 (specifically, the first end of the air pipe switch valve 21), or the tenth valve port 273 (specifically, the tenth valve port 273 passes through the first commutation valve 23) is connected to the fourth refrigerant port 172.

[0101] Wherein, the outlet 112 of the compressor 11 is communicated with the refrigerant inlet 121 through the eighth valve port 271 and the ninth valve port 272; and / or, the outlet 112 of the compressor 11 is communicated with the total interface end of the air pipe 13 or the fourth refrigerant port 172 through the eighth valve port 271 and the tenth valve port 273.

[0102] In some embodiments, the hot water heat pump system further includes a third refrigerant flow regulating device 28. The second end of the economizer module (specifically, the seventh refrigerant port 183) is connected to the third refrigerant port 171 through the third refrigerant flow regulating device 28. For example, the third refrigerant flow regulating device 28 is an electronic expansion valve or a thermostatic expansion valve. The electronic expansion valve and the thermostatic expansion valve here are only examples and do not limit the present application.

[0103] In this embodiment, the temperature of the refrigerant entering the outdoor heat exchanger 17 can be further reduced through the third refrigerant flow regulating device 28.

[0104] Moreover, the hot water heat pump system further includes a first check valve 29. The third refrigerant port 171 is also connected to the second end of the economizer module (specifically, the seventh refrigerant port 183) through the first check valve 29. The conducting direction of the first check valve 29 is towards the second end of the economizer module.

[0105] In some embodiments, the hot water heat pump system further includes a second check valve 30. The refrigerant outlet 122 is connected to the total interface end of the liquid pipe 14 (specifically, the first end of the liquid pipe switch valve 22) through the second check valve 30. The conducting direction of the second check valve 30 is towards the total interface end of the liquid pipe 14. It should be noted here that the orientations of the first check valve 29 and the second check valve 30 refer to the flow direction of the refrigerant, not the orientation in space.

[0106] In some embodiments, the hot water heat pump system further includes a gas-liquid separator 31. The gas-liquid separator 31 is used to separate gaseous refrigerant and liquid refrigerant. The gas-liquid separator 31 is provided at the inlet 111 end of the compressor 11. The eighth refrigerant port 184 is connected to the gas-liquid separator 31.

[0107] In some embodiments, the hot water heat pump system further includes an oil separator 32 and an oil return pipe 33. The oil separator 32 is provided at the outlet 112 end of the compressor 11. The oil separator 32 is used to separate the lubricating oil from the compressor 11 mixed in the refrigerant and return it to the compressor 11 through the oil return pipe 33.

[0108] Completely, as Figure 1As shown, the connection relationships between the above components are as follows: the outlet 112 of the compressor 11 is connected to the eighth valve port 271 of the third reversing valve 27 through the oil separator 32, the ninth valve port 272 of the third reversing valve 27 is connected to the refrigerant inlet 121 of the domestic hot water heat exchanger 12, and the tenth valve port 273 of the third reversing valve 27 is connected to the first valve port 231 of the first reversing valve 23;

[0109] The refrigerant outlet 122 of the domestic hot water heat exchanger 12 is connected to the fifth valve port 241 of the second reversing valve 24. The sixth valve port 242 of the second reversing valve 24 is connected to the first end of the liquid pipe switch valve 22 through the second check valve 30. The seventh valve port 243 of the second reversing valve 24 is connected to the first valve port 231 of the first reversing valve 23;

[0110] The water outlet 252 of the domestic water tank 25 is connected to the first water inlet 123 of the domestic hot water heat exchanger 12 through the hot water pump 26, and the first water outlet 124 of the domestic hot water heat exchanger 12 is connected to the water return port 253 of the domestic water tank 25;

[0111] The second valve port 232 of the first reversing valve 23 is connected to the fourth refrigerant port 172 of the outdoor heat exchanger 17. One path of the third refrigerant port 171 of the outdoor heat exchanger 17 is connected to the seventh refrigerant port 183 through the first check valve 29, and the conducting direction of the first check valve 29 is towards the seventh refrigerant port 183. The other path of the third refrigerant port 171 of the outdoor heat exchanger 17 is connected to the seventh refrigerant port 183 through the third refrigerant flow regulating device 28;

[0112] The second end of the liquid pipe switch valve 22 is connected to the liquid pipe 14. The first end of the liquid pipe switch valve 22 is connected to the first interface 201 of the liquid storage container 20. One path of the second interface 202 of the liquid storage container 20 is connected to the fifth refrigerant port 181, and the other path is connected to the sixth refrigerant port 182 through the second refrigerant flow regulating device 19. The eighth refrigerant port 184 is connected to the inlet 111 of the compressor 11 through the gas-liquid separator 31;

[0113] In each group of the indoor units 15 and the first refrigerant flow regulating devices 16, the second refrigerant port 152 is connected to the corresponding sub-interface end in the liquid pipe 14 through the first refrigerant flow regulating device 16, and the first refrigerant port 151 is connected to the corresponding sub-interface end in the gas pipe 13. The second end of the gas pipe switch valve 21 is connected to the gas pipe 13;

[0114] The first end of the tracheal switching valve 21 is connected to the fourth valve port 234 of the first reversing valve 23, and the third valve port 233 of the first reversing valve 23 is connected to the inlet 111 of the compressor 11 through the gas-liquid separator 31.

[0115] It should be noted here that the connections between the above ports, between the ports and the components, or between the components are only physical structure connections, and do not uniquely define the communication relationship and the refrigerant flow direction relationship therein.

[0116] In different situations, the hot water heat pump system will correspond to different valve port connections, specifically as follows:

[0117] Such as Figure 2As shown, in the refrigeration and total heat recovery domestic hot water production mode, the eighth valve port 271 of the third reversing valve 27 is communicated with the ninth valve port 272, the fifth valve port 241 of the second reversing valve 24 is communicated with the sixth valve port 242, the fourth valve port 234 of the first reversing valve 23 is communicated with the third valve port 233, the gas pipe switch valve 21 and the liquid pipe switch valve 22 are opened, the first refrigerant flow regulating device 16 is opened, and the second refrigerant flow regulating device 19 and the third refrigerant flow regulating device 28 are closed. That is, when rapid hot water production is required in the refrigeration mode, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 first passes through the eighth valve port 271 and the ninth valve port 272 of the third reversing valve 27 and then enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12 to produce hot water and then becomes medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the fifth valve port 241 and the sixth valve port 242 of the second reversing valve 24 and then enters the liquid pipe 14 through the second one-way valve 30 and the liquid pipe switch valve 22. The medium-temperature liquid refrigerant enters each group of the first refrigerant flow regulating devices 16 in the liquid pipe 14, and after throttling and cooling by the first refrigerant flow regulating device 16, it becomes lower-temperature liquid refrigerant, and then enters the second refrigerant port 152 of the indoor unit 15. The lower-temperature liquid refrigerant exchanges heat with the indoor air in the indoor unit 15, and after absorbing the heat in the indoor air, it evaporates into lower-temperature gaseous refrigerant. The indoor unit 15 blows cold air. The lower-temperature gaseous refrigerant output from the first refrigerant port 151 of each group of indoor units 15 enters the gas pipe 13, and after passing through the gas pipe switch valve 21, the fourth valve port 234 and the third valve port 233 of the first reversing valve 23, it returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31 for reciprocating circulation. The domestic hot water heat exchanger 12 is communicated with the domestic water tank 25, so that all the condensation heat originally used for heat exchange with air by the outdoor heat exchanger 17 during refrigeration is recovered and utilized, avoiding waste of heat in the heat exchange between the outdoor heat exchanger 17 and air. The recovered heat exchanges heat with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12 to rapidly produce hot water, improving the energy utilization rate and the hot water production speed.

[0118] As Figure 3As shown, in the refrigeration and waste heat recovery for domestic hot water mode, the eighth valve port 271 of the third reversing valve 27 is in communication with the ninth valve port 272, the fifth valve port 241 of the second reversing valve 24 is in communication with the seventh valve port 243, the first valve port 231 of the first reversing valve 23 is in communication with the second valve port 232, the fourth valve port 234 of the first reversing valve 23 is in communication with the third valve port 233, the gas pipe switch valve 21 and the liquid pipe switch valve 22 are opened, the first refrigerant flow regulating device 16 is opened, and the second refrigerant flow regulating device 19 and the third refrigerant flow regulating device 28 are closed. That is, when hot water needs to be prepared in the refrigeration mode, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 first passes through the eighth valve port 271 and the ninth valve port 272 of the third reversing valve 27 and then enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12 to prepare hot water and then becomes medium-temperature gaseous refrigerant. The medium-temperature gaseous refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the fifth valve port 241 and the seventh valve port 243 of the second reversing valve 24 and the first valve port 231 and the second valve port 232 of the first reversing valve 23 and then enters the fourth refrigerant port 172 of the outdoor heat exchanger 17. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 17 and then becomes medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the third refrigerant port 171 of the outdoor heat exchanger 17 passes through the first check valve 29, the seventh refrigerant port 183 and the fifth refrigerant port 181 and then enters the second interface 202 of the liquid storage container 20. The medium-temperature liquid refrigerant output from the first interface 201 of the liquid storage container 20 passes through the liquid pipe switch valve 22 and enters the liquid pipe 14. The medium-temperature liquid refrigerant enters each group of the first refrigerant flow regulating devices 16 in the liquid pipe 14, and after throttling and cooling by the first refrigerant flow regulating device 16, it becomes lower-temperature liquid refrigerant, and then enters the second refrigerant port 152 of the indoor unit 15. The lower-temperature liquid refrigerant exchanges heat with the indoor air in the indoor unit 15, and after absorbing the heat in the indoor air, it evaporates and becomes lower-temperature gaseous refrigerant. The indoor unit 15 blows cold air. The lower-temperature gaseous refrigerant output from the first refrigerant port 151 of each group of the indoor units 15 enters the gas pipe 13, passes through the gas pipe switch valve 21, the fourth valve port 234 and the third valve port 233 of the first reversing valve 23, and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31 for reciprocating circulation.The domestic hot water heat exchanger 12 is connected to the domestic water tank 25, so that at least part of the condensation heat originally used by the outdoor heat exchanger 17 for heat exchange with air is recovered and utilized during refrigeration, avoiding waste of heat due to heat exchange between the outdoor heat exchanger 17 and air. The recovered heat exchanges with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12 to prepare hot water, improving energy utilization efficiency.

[0119] Specifically, Figure 3 and Figure 2 the difference from the illustrated embodiment is that Figure 3 at least part of the condensation heat originally used by the outdoor heat exchanger 17 for heat exchange with air is recovered and utilized, while Figure 2 all of the condensation heat originally used by the outdoor heat exchanger 17 for heat exchange with air is recovered and utilized.

[0120] For example, Figure 4As shown, in the refrigeration mode and the waste heat recovery mode for producing domestic hot water, the eighth valve port 271 of the third reversing valve 27 is respectively connected to the ninth valve port 272 and the tenth valve port 273, the fifth valve port 241 of the second reversing valve 24 is connected to the seventh valve port 243, the first valve port 231 of the first reversing valve 23 is connected to the second valve port 232, the fourth valve port 234 of the first reversing valve 23 is connected to the third valve port 233, the gas pipe switching valve 21 and the liquid pipe switching valve 22 are opened, the first refrigerant flow regulating device 16 is opened, and the second refrigerant flow regulating device 19 and the third refrigerant flow regulating device 28 are closed. That is, when hot water needs to be prepared in the refrigeration mode, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 passes through the eighth valve port 271 and the ninth valve port 272 of the third reversing valve 27 and then enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12, and another path passes through the eighth valve port 271 and the tenth valve port 273 of the third reversing valve 27 and the first valve port 231 and the second valve port 232 of the first reversing valve 23 and then enters the fourth refrigerant port 172 of the outdoor heat exchanger 17. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12, and after preparing hot water, it becomes medium-temperature gaseous refrigerant. The medium-temperature gaseous refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the fifth valve port 241 and the seventh valve port 243 of the second reversing valve 24 and the first valve port 231 and the second valve port 232 of the first reversing valve 23 and then enters the fourth refrigerant port 172 of the outdoor heat exchanger 17. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 17 and then becomes medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the third refrigerant port 171 of the outdoor heat exchanger 17 passes through the first check valve 29, the seventh refrigerant port 183 and the fifth refrigerant port 181 and then enters the second interface 202 of the liquid storage container 20. The medium-temperature liquid refrigerant output from the first interface 201 of the liquid storage container 20 enters the liquid pipe 14 through the liquid pipe switching valve 22. The medium-temperature liquid refrigerant enters each group of the first refrigerant flow regulating devices 16 in the liquid pipe 14, and after throttling and cooling by the first refrigerant flow regulating device 16, it becomes lower-temperature liquid refrigerant, and then enters the second refrigerant port 152 of the indoor unit 15. The lower-temperature liquid refrigerant exchanges heat with the indoor air in the indoor unit 15, and after absorbing the heat in the indoor air, it evaporates and becomes lower-temperature gaseous refrigerant. The indoor unit 15 blows cold air. The lower-temperature gaseous refrigerant output from the first refrigerant port 151 of each group of the indoor units 15 enters the gas pipe 13, passes through the gas pipe switching valve 21, the fourth valve port 234 and the third valve port 233 of the first reversing valve 23, and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31 for reciprocating circulation.The domestic hot water heat exchanger 12 is connected to the domestic water tank 25, so that at least part of the condensation heat originally used for heat exchange with air by the outdoor heat exchanger 17 during refrigeration can be recycled, avoiding waste of heat during heat exchange between the outdoor heat exchanger 17 and air. The recycled heat exchanges with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12 to prepare hot water, improving energy utilization efficiency.

[0121] Specifically, Figure 4 and Figure 3 the difference from the shown embodiment is that Figure 4 in the shown embodiment, an additional refrigerant circuit passes through the eighth valve port 271 and the tenth valve port 273 of the third reversing valve 27, and the first valve port 231 and the second valve port 232 of the first reversing valve 23 and then enters the outdoor heat exchanger 17. This can better regulate the amount of refrigerant entering the domestic hot water heat exchanger 12, and the refrigerant circuit directly from the compressor 11 to the first reversing valve 23 can ensure that the refrigerant is in a gaseous state. However, the refrigerant in the circuit passing through the domestic hot water heat exchanger 12 may be in a liquid state after heat exchange. The pure gaseous refrigerant can more effectively ensure that there is sufficient pressure difference for the first reversing valve 23 to reverse. Therefore, the pressure loss in the refrigerant pipeline is small, and the third reversing valve 27 is not easily affected by impurities, enabling the system to operate stably.

[0122] Such as Figure 5As shown, in the heating plus domestic hot water mode, the eighth valve port 271 of the third reversing valve 27 is communicated with the ninth valve port 272, the fifth valve port 241 of the second reversing valve 24 is communicated with the seventh valve port 243, the first valve port 231 of the first reversing valve 23 is communicated with the fourth valve port 234, the second valve port 232 of the first reversing valve 23 is communicated with the third valve port 233, the gas pipe switching valve 21 and the liquid pipe switching valve 22 are opened, and the first refrigerant flow rate regulating device 16, the second refrigerant flow rate regulating device 19, and the third refrigerant flow rate regulating device 28 are opened.That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 first passes through the eighth valve port 271 and the ninth valve port 272 of the third reversing valve 27 and then enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12, and becomes medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the fifth valve port 241 and the seventh valve port 243 of the second reversing valve 24 and the first valve port 231 and the fourth valve port 234 of the first reversing valve 23, and then enters the air pipe 13 through the air pipe switch valve 21. The medium-temperature gaseous refrigerant enters the first refrigerant port 151 of each indoor unit 15 in the air pipe 13. The medium-temperature gaseous refrigerant exchanges heat with the indoor air in the indoor unit 15, and the medium-temperature gaseous refrigerant condenses into medium-temperature liquid refrigerant after releasing heat to the indoor air. The indoor unit 15 blows hot air. The medium-temperature liquid refrigerant output from the second refrigerant port 152 of the indoor unit 15 becomes low-temperature liquid refrigerant after throttling and temperature reduction by the first refrigerant flow regulating device 16. Then, the low-temperature liquid refrigerant output from each first refrigerant flow regulating device 16 enters the liquid pipe 14, passes through the liquid pipe switch valve 22, and enters the first interface 201 of the liquid storage container 20. The low-temperature liquid refrigerant output from the second interface 202 of the liquid storage container 20 enters the refrigerant main path in one way and the refrigerant auxiliary path in the other way. The low-temperature liquid refrigerant in the refrigerant auxiliary path becomes lower-temperature low-temperature liquid refrigerant after throttling and temperature reduction by the second refrigerant flow regulating device 19. The lower-temperature low-temperature liquid refrigerant absorbs the refrigerant heat from the refrigerant main path in the economizer 18 and becomes high-temperature gaseous refrigerant, and finally returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31. The low-temperature liquid refrigerant from the refrigerant main path becomes lower-temperature low-temperature liquid refrigerant after heat exchange and temperature reduction, and then enters the third refrigerant flow regulating device 28 for throttling and temperature reduction. After becoming even lower-temperature low-temperature liquid refrigerant, it enters the third refrigerant port 171 of the outdoor heat exchanger 17. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 17 and becomes low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the fourth refrigerant port 172 of the outdoor heat exchanger 17 passes through the second valve port 232 and the third valve port 233 of the first reversing valve 23 and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31, and circulates reciprocally. The domestic hot water heat exchanger 12 is connected to the domestic water tank 25, so that hot water can be prepared while heating, and the energy utilization rate is improved.

[0123] Such as Figure 6As shown, in the heating and domestic hot water mode, the eighth valve port 271 of the third reversing valve 27 is respectively communicated with the ninth valve port 272 and the tenth valve port 273, the fifth valve port 241 of the second reversing valve 24 is communicated with the seventh valve port 243, the first valve port 231 of the first reversing valve 23 is communicated with the fourth valve port 234, the second valve port 232 of the first reversing valve 23 is communicated with the third valve port 233, the gas pipe switch valve 21 and the liquid pipe switch valve 22 are opened, and the first refrigerant flow rate regulating device 16, the second refrigerant flow rate regulating device 19 and the third refrigerant flow rate regulating device 28 are opened.That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12 after passing through the eighth valve port 271 and the ninth valve port 272 of the third reversing valve 27. Another path passes through the eighth valve port 271 and the tenth valve port 273 of the third reversing valve 27, the first valve port 231 and the fourth valve port 234 of the first reversing valve 23, and the gas pipe switch valve 21 and then enters the gas pipe 13. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12, and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the fifth valve port 241 and the seventh valve port 243 of the second reversing valve 24, the first valve port 231 and the fourth valve port 234 of the first reversing valve 23, and then enters the gas pipe 13 through the gas pipe switch valve 21. The medium-temperature gaseous refrigerant enters the first refrigerant port 151 of each indoor unit 15 in the gas pipe 13, exchanges heat with indoor air in the indoor unit 15, and the medium-temperature gaseous refrigerant condenses into a medium-temperature liquid refrigerant after releasing heat to the indoor air. The indoor unit 15 blows out hot air. The medium-temperature liquid refrigerant output from the second refrigerant port 152 of the indoor unit 15 becomes a low-temperature liquid refrigerant after throttling and cooling by the first refrigerant flow regulating device 16. Then, the low-temperature liquid refrigerant output from each first refrigerant flow regulating device 16 enters the liquid pipe 14, passes through the liquid pipe switch valve 22 and then enters the first interface 201 of the liquid storage container 20. The low-temperature liquid refrigerant output from the second interface 202 of the liquid storage container 20 enters the refrigerant main path in one way and enters the refrigerant auxiliary path in another way. The low-temperature liquid refrigerant in the refrigerant auxiliary path becomes a lower-temperature low-temperature liquid refrigerant after being throttled and cooled by the second refrigerant flow regulating device 19. The lower-temperature low-temperature liquid refrigerant absorbs the refrigerant heat from the refrigerant main path in the economizer 18 and becomes a high-temperature gaseous refrigerant, and finally returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31. The low-temperature liquid refrigerant from the refrigerant main path becomes a lower-temperature low-temperature liquid refrigerant after heat exchange to reduce the temperature, and then further enters the third refrigerant flow regulating device 28 for throttling and cooling, becomes an even lower-temperature low-temperature liquid refrigerant and then enters the third refrigerant port 171 of the outdoor heat exchanger 17. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 17 and becomes a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the fourth refrigerant port 172 of the outdoor heat exchanger 17 returns to the inlet 111 of the compressor 11 through the second valve port 232 and the third valve port 233 of the first reversing valve 23 and the gas-liquid separator 31, and circulates reciprocally. The domestic hot water heat exchanger 12 is connected to the domestic water tank 25, so that hot water can be prepared while heating, improving the energy utilization rate.

[0124] Specifically, Figure 6 and Figure 5 the difference from the illustrated embodiment is that Figure 6 in the illustrated embodiment, there is an additional path that passes through the eighth valve port 271 and the tenth valve port 273 of the third reversing valve 27, the first valve port 231 and the fourth valve port 234 of the first reversing valve 23, and the gas pipe switch valve 21 and then enters the gas pipe 13. This can better regulate the amount of refrigerant entering the domestic hot water heat exchanger 12. And the path where the refrigerant directly reaches the first reversing valve 23 from the compressor 11 can ensure that the refrigerant is in a gaseous state. However, the refrigerant in the path passing through the domestic hot water heat exchanger 12 may be in a liquid state after heat exchange. The pure gaseous refrigerant can more ensure that there is sufficient pressure difference for the first reversing valve 23 to reverse. Therefore, the pressure loss of the refrigerant pipeline is small, and the third reversing valve 27 is not easily affected by impurities, enabling the system to operate stably.

[0125] Such as Figure 7As shown, in the pure hot water mode, the eighth valve port 271 of the third reversing valve 27 is communicated with the ninth valve port 272, the fifth valve port 241 of the second reversing valve 24 is communicated with the sixth valve port 242, the second valve port 232 of the first reversing valve 23 is communicated with the third valve port 233, the liquid pipe switch valve 22 is closed, and the second refrigerant flow regulating device 19 and the third refrigerant flow regulating device 28 are opened. That is, when only hot water needs to be prepared, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 first passes through the eighth valve port 271 and the ninth valve port 272 of the third reversing valve 27 and then enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12 to prepare hot water, and becomes medium-temperature liquid refrigerant after preparing hot water. The medium-temperature liquid refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the fifth valve port 241 and the sixth valve port 242 of the second reversing valve 24 and then enters the first interface 201 of the liquid storage container 20. The medium-temperature liquid refrigerant output from the second interface 202 of the liquid storage container 20 enters the main refrigerant path in one way and enters the auxiliary refrigerant path in the other way. The medium-temperature liquid refrigerant in the auxiliary refrigerant path is throttled and cooled by the second refrigerant flow regulating device 19 and becomes low-temperature liquid refrigerant. The low-temperature liquid refrigerant absorbs the refrigerant heat from the main refrigerant path in the economizer 18 and becomes high-temperature gaseous refrigerant, and finally returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31. The medium-temperature liquid refrigerant from the main refrigerant path becomes low-temperature liquid refrigerant after heat exchange and temperature reduction, and then enters the third refrigerant flow regulating device 28 for throttling and cooling, becomes lower-temperature low-temperature liquid refrigerant and enters the third refrigerant port 171 of the outdoor heat exchanger 17. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 17 and becomes low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the fourth refrigerant port 172 of the outdoor heat exchanger 17 passes through the second valve port 232 and the third valve port 233 of the first reversing valve 23 and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31, and reciprocates. The domestic hot water heat exchanger 12 is communicated with the domestic water tank 25, so that all the heat from the compressor 11 can be used alone to exchange heat with the water in the domestic water tank 25 in the domestic hot water heat exchanger 12, the energy is utilized specifically, the refrigerant circuit is shortened when making hot water, and it does not need to pass through the indoor unit 15, and the heat exchange efficiency is higher.

[0126] As Figure 8As shown, in the refrigeration mode, the eighth valve port 271 of the third reversing valve 27 is in communication with the tenth valve port 273, the first valve port 231 of the first reversing valve 23 is in communication with the second valve port 232, the fourth valve port 234 of the first reversing valve 23 is in communication with the third valve port 233, the first refrigerant flow regulating device 16 is opened, the second refrigerant flow regulating device 19 and the third refrigerant flow regulating device 28 are closed, and the gas pipe switch valve 21 and the liquid pipe switch valve 22 are opened. That is, when refrigerating alone, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 passes through the eighth valve port 271 and the tenth valve port 273 of the third reversing valve 27 and the first valve port 231 and the second valve port 232 of the first reversing valve 23 and then enters the fourth refrigerant port 172 of the outdoor heat exchanger 17. The high-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 17 and becomes a medium-temperature liquid refrigerant. The output medium-temperature liquid refrigerant passes through the first check valve 29, the seventh refrigerant port 183 and the fifth refrigerant port 181 and then enters the second interface 202 of the liquid storage container 20. The medium-temperature liquid refrigerant output from the first interface 201 of the liquid storage container 20 enters the liquid pipe 14 through the liquid pipe switch valve 22. The medium-temperature liquid refrigerant enters each group of the first refrigerant flow regulating devices 16 in the liquid pipe 14. After throttling and temperature reduction by the first refrigerant flow regulating device 16, it becomes a lower-temperature liquid refrigerant, and then enters the second refrigerant port 152 of the indoor unit 15. The low-temperature liquid refrigerant exchanges heat with the indoor air in the indoor unit 15. After absorbing the heat in the indoor air, the low-temperature liquid refrigerant evaporates and becomes a low-temperature gaseous refrigerant. The indoor unit 15 blows cold air. The low-temperature gaseous refrigerant output from the first refrigerant port 151 of each group of the indoor units 15 enters the gas pipe 13, passes through the gas pipe switch valve 21, the fourth valve port 234 and the third valve port 233 of the first reversing valve 23, and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31 for reciprocating circulation.

[0127] As Figure 9As shown, in the heating mode, the eighth valve port 271 of the third reversing valve 27 is communicated with the tenth valve port 273, the first valve port 231 of the first reversing valve 23 is communicated with the fourth valve port 234, the second valve port 232 of the first reversing valve 23 is communicated with the third valve port 233, the first refrigerant flow regulating device 16, the second refrigerant flow regulating device 19 and the third refrigerant flow regulating device 28 are opened, and the gas pipe switch valve 21 and the liquid pipe switch valve 22 are opened. That is, when heating alone, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 passes through the eighth valve port 271 and the tenth valve port 273 of the third reversing valve 27, the first valve port 231 and the fourth valve port 234 of the first reversing valve 23, and the gas pipe switch valve 21 and then enters the gas pipe 13. The high-temperature gaseous refrigerant enters the first refrigerant port 151 of each indoor unit 15 in the gas pipe 13. The medium-temperature gaseous refrigerant exchanges heat with the indoor air in the indoor unit 15, and the medium-temperature gaseous refrigerant releases heat to the indoor air and then condenses into medium-temperature liquid refrigerant. The indoor unit 15 blows hot air. The medium-temperature liquid refrigerant output from the second refrigerant port 152 of the indoor unit 15 becomes low-temperature liquid refrigerant after throttling and temperature reduction by the first refrigerant flow regulating device 16. Then, the low-temperature liquid refrigerant output from each first refrigerant flow regulating device 16 enters the liquid pipe 14, passes through the liquid pipe switch valve 22 and then enters the first interface 201 of the liquid storage container 20. The low-temperature liquid refrigerant output from the second interface 202 of the liquid storage container 20 enters the refrigerant main path on one hand and the refrigerant auxiliary path on the other hand. The low-temperature liquid refrigerant in the refrigerant auxiliary path becomes even lower-temperature liquid refrigerant after throttling and temperature reduction by the second refrigerant flow regulating device 19. The even lower-temperature liquid refrigerant absorbs the refrigerant heat from the refrigerant main path in the economizer 18 and then becomes high-temperature gaseous refrigerant, and finally returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31. The low-temperature liquid refrigerant from the refrigerant main path becomes even lower-temperature liquid refrigerant after heat exchange and temperature reduction, and then further enters the third refrigerant flow regulating device 28 for throttling and temperature reduction, and becomes even lower-temperature liquid refrigerant and then enters the third refrigerant port 171 of the outdoor heat exchanger 17. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 17 and then becomes low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the fourth refrigerant port 172 of the outdoor heat exchanger 17 passes through the second valve port 232 and the third valve port 233 of the first reversing valve 23 and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 31, and the cycle repeats.

[0128] It should be noted here that the above high, medium, and low temperatures are only relative expressions, and the gaseous refrigerant may also refer to the gas-liquid two-phase state or the gaseous state, which is not limited here.

[0129] In some embodiments, the compressor 11, the domestic hot water heat exchanger 12, the outdoor heat exchanger 17, the economizer 18, the second refrigerant flow regulating device 19, the liquid storage container 20, the gas pipe switch valve 21, the liquid pipe switch valve 22, the first reversing valve 23, the second reversing valve 24, the domestic water tank 25, the hot water water pump 26, the third reversing valve 27, the third refrigerant flow regulating device 28, the first check valve 29, the second check valve 30, the gas-liquid separator 31, the oil separator 32 and the oil return pipe 33 are all integrated in the outdoor unit.

[0130] In some other embodiments, the first check valve 29 and the second check valve 30 can be replaced with a first switch valve and a second switch valve. For example, the first switch valve and the second switch valve are globe valves or solenoid valves. The globe valves and the solenoid valves here are only examples and do not limit the present application.

[0131] Among them, the switch states of the first switch valve and the second switch valve in different modes are as follows:

[0132] In the above-mentioned refrigeration and full heat recovery for domestic hot water mode, the first switch valve is closed and the second switch valve is opened. In the above-mentioned refrigeration and waste heat recovery for domestic hot water mode, the first switch valve is opened and the second switch valve is closed. In the above-mentioned heating plus domestic hot water mode, the first switch valve and the second switch valve are closed. In the above-mentioned pure hot water mode, the first switch valve is closed and the second switch valve is opened. In the above-mentioned refrigeration mode, the first switch valve is opened and the second switch valve is closed. In the above-mentioned heating mode, the first switch valve and the second switch valve are closed.

[0133] By implementing the present utility model, the following beneficial effects are achieved:

[0134] Through the parallel-connected gas pipe 13 and liquid pipe 14 of the present utility model, the combination of the multi-connected air-conditioning system and domestic hot water is realized. At the same time, the temperature of the refrigerant entering the outdoor heat exchanger 17 can be reduced through the economic module, thereby improving the heat absorption performance of the outdoor heat exchanger 17 in a low-temperature environment and enhancing the subsequent heating effect.

[0135] It can be understood that the above embodiments only represent some implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several deformations and improvements can also be made. These all belong to the protection scope of the present utility model, that is, the embodiments described in "in some embodiments" can be freely combined with any of the above or below embodiments. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.

Claims

1. A hot water heat pump system, characterized in that: include: A compressor, the compressor being used to compress the refrigerant; A domestic hot water heat exchanger, the domestic hot water heat exchanger comprising a refrigerant inlet and a refrigerant outlet connected to the refrigerant inlet; air and liquid pipes; At least two groups of indoor units and a first refrigerant flow regulating device, wherein the indoor unit comprises a first refrigerant port and a second refrigerant port connected to the first refrigerant port; an outdoor heat exchanger, the outdoor heat exchanger comprising a third refrigerant port and a fourth refrigerant port communicating with the third refrigerant port; and An economic module, the economic module is used to reduce the temperature of the refrigerant entering the outdoor heat exchanger; Wherein, the refrigerant inlet is connected to the outlet of the compressor, and the refrigerant outlet is connected to the main interface end of the air pipe; In each group of the indoor unit and the first refrigerant flow regulating device, the first refrigerant port is connected to the corresponding branch interface end in the gas pipe, and the second refrigerant port is connected to the corresponding branch interface end in the liquid pipe through the first refrigerant flow regulating device; The total interface end of the liquid pipe is connected to the first end of the economic module, and the second end of the economic module is connected to the third refrigerant port; The fourth refrigerant port is connected to the inlet of the compressor.

2. The hot water heat pump system according to claim 1, characterized in that: The economizer module includes an economizer and a second refrigerant flow regulating device; The economizer includes a fifth refrigerant port, a sixth refrigerant port, a seventh refrigerant port connected to the fifth refrigerant port, and an eighth refrigerant port connected to the sixth refrigerant port; Among them, the second end of the economic module is the seventh refrigerant port; the first end of the economic module is divided into two paths, one path is connected to the third refrigerant port via the fifth refrigerant port and the seventh refrigerant port in sequence, and the other path is connected to the inlet of the compressor via the second refrigerant flow regulating device, the sixth refrigerant port and the eighth refrigerant port in sequence.

3. The hot water heat pump system according to claim 1, characterized in that: The hot water heat pump system also includes: A liquid storage container, wherein the total interface end of the liquid pipe is connected to the first end of the economic module through the liquid storage container.

4. The hot water heat pump system according to claim 1, characterized in that: The hot water heat pump system also includes: An air pipe switch valve and a liquid pipe switch valve, wherein the air pipe switch valve is arranged at the total interface end of the air pipe, and the liquid pipe switch valve is arranged at the total interface end of the liquid pipe.

5. The hot water heat pump system according to claim 1, characterized in that: The refrigerant outlet is also connected to the first end of the economizer module; and / or, The refrigerant outlet is also connected to the main interface end of the liquid pipe and / or the fourth refrigerant port, and the main interface end of the gas pipe is also connected to the inlet of the compressor.

6. The hot water heat pump system according to claim 5, characterized in that: The hot water heat pump system also includes: a first reversing valve, the first reversing valve comprising 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 refrigerant outlet; the second valve port is connected to the fourth refrigerant port; the third valve port is connected to the inlet of the compressor; the fourth valve port is connected to the main interface end of the air pipe; Wherein, when the refrigerant outlet is connected with the main interface end of the air pipe through the first valve port and the fourth valve port, and the fourth refrigerant port is connected with the inlet of the compressor through the second valve port and the third valve port, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the fourth valve port, the air pipe, the first refrigerant port, the second refrigerant port, the first refrigerant flow regulating device, the liquid pipe, the economic module, the third refrigerant port, the fourth refrigerant port, the second valve port and the third valve port after coming out of the compressor to form a heating refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is heat exchanged in the domestic hot water heat exchanger; When the refrigerant outlet is connected with the fourth refrigerant port through the first valve port and the second valve port, and the total interface end of the air pipe is connected with the inlet of the compressor through the fourth valve port and the third valve port, the refrigerant comes out of the compressor and passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the second valve port, the fourth refrigerant port, the third refrigerant port, the economic module, the liquid pipe, the first refrigerant flow regulating device, the second refrigerant port, the first refrigerant port, the air pipe, the fourth valve port and the third valve port to form a refrigeration refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger.

7. The hot water heat pump system according to claim 5, characterized in that: The hot water heat pump system also includes: a second reversing valve, the second reversing valve comprising a fifth valve port, a sixth valve port and a seventh valve port; The fifth valve port is connected to the refrigerant outlet; the sixth valve port is connected to the total interface end of the liquid pipe and the first end of the economic module; the seventh valve port is connected to the total interface end of the gas pipe, or the seventh valve port is connected to the fourth refrigerant port; Wherein, when the refrigerant outlet is connected to the total interface end of the liquid pipe through the fifth valve port and the sixth valve port, and the total interface end of the gas pipe is connected to the inlet of the compressor, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the sixth valve port, the liquid pipe, the first refrigerant flow regulating device, the second refrigerant port, the first refrigerant port and the gas pipe after coming out of the compressor to form a refrigeration refrigerant circuit, and all the heat of the refrigerant is exchanged in the domestic hot water heat exchanger; The refrigerant outlet is connected to the fourth refrigerant port through the fifth valve port and the seventh valve port, and when the total interface end of the air pipe is connected to the inlet of the compressor, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the seventh valve port, the fourth refrigerant port, the third refrigerant port, the economic module, the liquid pipe, the first refrigerant flow regulating device, the second refrigerant port, the first refrigerant port and the air pipe after coming out of the compressor to form a refrigeration refrigerant circuit, and at least part of the heat of the refrigerant is heat exchanged in the domestic hot water heat exchanger; The refrigerant outlet is connected to the main interface end of the air pipe through the fifth valve port and the seventh valve port, and when the fourth refrigerant port is connected to the inlet of the compressor, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the seventh valve port, the air pipe, the first refrigerant port, the second refrigerant port, the first refrigerant flow regulating device, the liquid pipe, the economic module, the third refrigerant port and the fourth refrigerant port after coming out of the compressor to form a heating refrigerant circuit, and at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger; When the refrigerant outlet is connected to the first end of the economizer module through the fifth valve port and the sixth valve port, and the fourth refrigerant port is connected to the inlet of the compressor, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the sixth valve port, the economizer module, the third refrigerant port and the fourth refrigerant port after coming out of the compressor to form a refrigerant circuit of pure hot water, and at the same time, at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger.

8. The hot water heat pump system according to claim 1, characterized in that: The hot water heat pump system also includes: a third reversing valve, the third reversing valve comprising an eighth valve port, a ninth valve port and a tenth valve port; The eighth valve port is connected to the outlet of the compressor; the ninth valve port is connected to the refrigerant inlet; the tenth valve port is connected to the main interface end of the air pipe, or the tenth valve port is connected to the fourth refrigerant port; Wherein, the outlet of the compressor is connected to the refrigerant inlet through the eighth valve port and the ninth valve port; and / or, The outlet of the compressor is connected to the main interface end of the air pipe or the fourth refrigerant port through the eighth valve port and the tenth valve port.

9. The hot water heat pump system according to claim 1, characterized in that: The hot water heat pump system also includes: a third refrigerant flow regulating device, wherein the second end of the economizer module is connected to the third refrigerant port via the third refrigerant flow regulating device; and The first one-way valve, the third refrigerant port is also connected to the second end of the economizer module through the first one-way valve, and the conducting direction of the first one-way valve is toward the second end of the economizer module.

10. The hot water heat pump system according to claim 1, characterized in that: The domestic hot water heat exchanger further comprises a first water inlet and a first water outlet communicating with the first water inlet; The hot water heat pump system also includes: A domestic water tank is connected to the first water inlet and the first water outlet respectively.

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