Heat pump system

Abstract

The utility model discloses a heat pump system which comprises a compressor, a domestic hot water heat exchanger, an outdoor side heat exchanger, at least two groups of indoor units, a first throttling device, a first reversing valve, an air pipe and a liquid pipe. The domestic hot water heat exchanger comprises a refrigerant outlet and a cold film inlet. The outdoor heat exchanger comprises a first refrigerant connector and a second refrigerant connector. The indoor unit comprises a third refrigerant connector and a fourth refrigerant connector. The refrigerant inlet is connected with an outlet of the compressor. The refrigerant outlet passes through the first reversing valve and then is connected with the main connector end of the liquid pipe through a pipeline, and the refrigerant outlet passes through the first reversing valve and then is connected with the first refrigerant connector through a pipeline. In each group, the third refrigerant connector is connected with the corresponding branch connector end in the liquid pipe through the first throttling device, and the fourth refrigerant connector is connected with the corresponding branch connector end in the air pipe. The main connector end of the air pipe is connected with an inlet of the compressor. According to the utility model, the combination of a multi-split system and domestic hot water is realized.

Description

Technical Field

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

[0002] With the continuous advancement of science and technology, people have higher and higher requirements for living environment. Air source heat pumps are favored by more and more manufacturers and users because they can solve the energy crisis to a certain extent. When traditional Tianfu hot water heat pump systems are combined with multi-split systems and domestic hot water, they either partially recover heat or fully recover heat. There are certain limitations in the application process, and the system circuit is complex. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a heat pump system in view of the defects existing in the related technologies mentioned in the above background technology.

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

[0005] A compressor, the compressor being used to compress the refrigerant;

[0006] 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;

[0007] An outdoor heat exchanger, the outdoor heat exchanger comprising a first refrigerant interface and a second refrigerant interface connected to the first refrigerant interface;

[0008] At least two groups of indoor units and a first throttling device, wherein the indoor units include a third refrigerant interface and a fourth refrigerant interface connected to the third refrigerant interface;

[0009] a first reversing valve, the first reversing valve being used to switch all or at least part of the heat of the refrigerant to be exchanged in the domestic hot water heat exchanger;

[0010] air and liquid pipes;

[0011] Wherein, the refrigerant inlet is connected to the outlet of the compressor through a pipeline;

[0012] The refrigerant outlet is connected to the main interface end of the liquid pipe through a pipeline after passing through the first reversing valve, and the refrigerant outlet is connected to the first refrigerant interface through a pipeline after passing through the first reversing valve;

[0013] The second refrigerant interface is connected to the main interface end of the liquid pipe through a pipeline;

[0014] In each group of the indoor unit and the first throttling device, the third refrigerant interface is connected to the corresponding branch interface end in the liquid pipe through the first throttling device, and the fourth refrigerant interface is connected to the corresponding branch interface end in the gas pipe;

[0015] The main interface end of the air pipe is connected to the inlet of the compressor through a pipeline.

[0016] In one embodiment, the heat pump system further comprises:

[0017] 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.

[0018] In one of the embodiments, the heat pump system further comprises a second throttling device;

[0019] Among them, the refrigerant outlet is connected to the total interface end of the gas pipe through a pipeline after passing through the first reversing valve, the total interface end of the liquid pipe is connected to the second refrigerant interface through the second throttling device, and the first refrigerant interface is connected to the inlet of the compressor through a pipeline.

[0020] In one embodiment, the first reversing valve includes a first valve port, a second valve port and a third valve port;

[0021] The first valve port is connected to the refrigerant outlet; the second valve port is connected to the total interface end of the liquid pipe through a pipeline; the third valve port is connected to the first refrigerant interface and the total interface end of the gas pipe through a pipeline;

[0022] Wherein, when the first valve port is connected with the second valve port, and the second valve port is connected with the liquid pipe through a pipeline, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the second valve port, the liquid pipe, the first throttling device, the third refrigerant interface, the fourth refrigerant interface 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;

[0023] When the first valve port is connected to the third valve port, and the third valve port is connected to the first refrigerant interface through a pipeline, the refrigerant comes out of the compressor and passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the third valve port, the first refrigerant interface, the second refrigerant interface, the liquid pipe, the first throttling device, the third refrigerant interface, the fourth refrigerant interface and the gas pipe to form a refrigeration refrigerant circuit, and at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger;

[0024] When the first valve port is connected to the third valve port, and the third valve port is connected to the air pipe through a pipeline, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the third valve port, the air pipe, the fourth refrigerant interface, the third refrigerant interface, the first throttling device, the liquid pipe, the second throttling device, the second refrigerant interface and the first refrigerant interface after coming out of the compressor to form a heating refrigerant circuit, and at least part of the heat of the refrigerant is heat exchanged in the domestic hot water heat exchanger;

[0025] When the first valve port is connected with the second valve port, and the second valve port is connected with the second refrigerant interface through the second throttling device, 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 second throttling device, the second refrigerant interface and the first refrigerant interface 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.

[0026] In one embodiment, the heat pump system further comprises:

[0027] A liquid storage container, wherein the second refrigerant interface is connected to the total interface end of the liquid pipe through the liquid storage container, and the total interface end of the liquid pipe is connected to the second refrigerant interface through the liquid storage container and the second throttling device.

[0028] In one embodiment, the heat pump system further comprises:

[0029] A first one-way valve, the second refrigerant interface is connected to the total interface end of the liquid pipe through the first one-way valve, and the conducting direction of the first one-way valve is toward the total interface end of the liquid pipe.

[0030] In one embodiment, the heat pump system further comprises:

[0031] A second one-way valve, the refrigerant outlet is connected to the total interface end of the liquid pipe through the second one-way valve after passing through the first reversing valve, and the conduction direction of the second one-way valve is toward the total interface end of the liquid pipe.

[0032] In one embodiment, the heat pump system further comprises:

[0033] a second reversing valve, the second reversing valve comprising a fourth valve port, a fifth valve port and a sixth valve port;

[0034] The fourth valve port is connected to the outlet of the compressor; the fifth valve port is connected to the refrigerant inlet; the sixth valve port is connected to the first refrigerant interface and the total interface end of the air pipe through a pipeline;

[0035] Wherein, when the fourth valve port is connected to the fifth valve port, the outlet of the compressor is connected to the refrigerant inlet;

[0036] When the fourth valve port is connected to the sixth valve port, the outlet of the compressor is connected to the first refrigerant interface or the main interface end of the air pipe through a pipeline.

[0037] In one embodiment, the heat pump system further comprises:

[0038] a third reversing valve, the third reversing valve comprising a seventh valve port, an eighth valve port, a ninth valve port and a tenth valve port;

[0039] The seventh valve port is connected to the first reversing valve; the eighth valve port is connected to the first refrigerant interface; the ninth valve port is connected to the inlet of the compressor through a pipeline; the tenth valve port is connected to the main interface end of the air pipe;

[0040] Wherein, when the seventh valve port is connected to the eighth valve port, the first refrigerant interface is connected to the first reversing valve;

[0041] When the seventh valve port is connected to the tenth valve port, the main interface end of the air pipe is connected to the first reversing valve;

[0042] When the eighth valve port is connected to the ninth valve port, the first refrigerant interface is connected to the inlet of the compressor through a pipeline;

[0043] When the tenth valve port is connected to the ninth valve port, the main interface end of the air pipe is connected to the inlet of the compressor through a pipeline.

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

[0045] The heat pump system further comprises:

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

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

[0048] The utility model realizes the combination of a multi-split system and domestic hot water by connecting the gas pipe and the liquid pipe in parallel. At the same time, the first reversing valve can realize automatic switching between full heat recovery and partial heat recovery during refrigeration, thereby improving the flexibility in different modes, thus ensuring both the heat recovery capacity and the temperature of the hot water after heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

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

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

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

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

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

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

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

[0057] Figure 8 It is a schematic diagram of the refrigerant flow direction of the heat pump system of the utility model in the cooling mode;

[0058] Fig. 9 It is a schematic diagram of the refrigerant flow direction of the heat pump system of the utility model in the heating mode. DETAILED DESCRIPTION

[0059] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0060] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0061] In the description of the utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the 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 therefore cannot be understood as a limitation on the 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 technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more.

[0062] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "located at", and "located at" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0063] like Figure 1 As shown, one embodiment of the utility model discloses a heat pump system, including a compressor 11, a domestic hot water heat exchanger 12, an outdoor heat exchanger 13, at least two groups of indoor units 14 and a first throttling device 15, a first reversing valve 16, an air pipe 17 and a liquid pipe 18. It can be understood that the at least two groups can be two groups, three groups or any number, 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 achieve heat exchange between the refrigerant and the water in the domestic water tank 22, and the domestic hot water heat exchanger 12 includes a refrigerant inlet 121 and a refrigerant outlet 122 connected to the refrigerant inlet 121. The outdoor heat exchanger 13 is used to achieve heat exchange between the refrigerant and the outside air, and the outdoor heat exchanger 13 includes a first refrigerant interface 131 and a second refrigerant interface 132 connected to the first refrigerant interface 131. The indoor unit 14 is used to achieve heat exchange between the refrigerant and the indoor air, and the indoor unit 14 includes a third refrigerant interface 141 and a fourth refrigerant interface 142 connected to the third refrigerant interface 141. The first reversing valve 16 is used to switch all or at least part of the heat of the refrigerant to be exchanged in the domestic hot water heat exchanger 12. The gas pipe 17 and the liquid pipe 18 respectively include a main interface and at least two branch interfaces, and one branch interface of the gas pipe 17 and one branch interface of the liquid pipe 18 correspond to a group of the indoor units 14 and the first throttling device 15.

[0065] The refrigerant inlet 121 is connected to the outlet 112 of the compressor 11 through a pipeline.

[0066] The refrigerant outlet 122 is connected to the main interface end of the liquid pipe 18 through a pipeline after passing through the first reversing valve 16 , and the refrigerant outlet 122 is connected to the first refrigerant interface 131 through a pipeline after passing through the first reversing valve 16 .

[0067] The second refrigerant interface 132 is connected to the main interface end of the liquid pipe 18 through a pipeline.

[0068] In each group of the indoor unit 14 and the first throttling device 15, the third refrigerant interface 141 is connected to the corresponding branch interface end in the liquid pipe 18 through the first throttling device 15, and the fourth refrigerant interface 142 is connected to the corresponding branch interface end in the gas pipe 17.

[0069] The main interface end of the air pipe 17 is connected to the inlet 111 of the compressor 11 through a pipeline.

[0070] For example, the domestic hot water heat exchanger 12 is a shell and tube heat exchanger, the outdoor heat exchanger 13 is a finned heat exchanger, and the first throttling device 15 is an electronic expansion valve or a thermal expansion valve. The indoor unit 14 is a duct unit, which includes an indoor heat exchanger (such as a finned heat exchanger) and a fan. The indoor heat exchanger is used to achieve heat exchange between the refrigerant and the indoor air. The indoor heat exchanger includes the third refrigerant interface 141 and the fourth refrigerant interface 142. The fan is used to drive the indoor air to exchange heat with the indoor heat exchanger. The shell and tube heat exchanger, the finned heat exchanger, the electronic expansion valve, the thermal expansion valve and the duct unit are only examples and are not intended to limit the present application.

[0071] This embodiment realizes the combination of the multi-split system and domestic hot water through the parallel connection of the gas pipe 17 and the liquid pipe 18. At the same time, the first reversing valve 16 can realize the automatic switching between full heat recovery and partial heat recovery during refrigeration, thereby improving the flexibility in different modes, thus ensuring both the heat recovery capacity and the temperature of the hot water after heat recovery.

[0072] In some embodiments, the heat pump system further includes an air pipe switch valve 19 and a liquid pipe switch valve 20, wherein the air pipe switch valve 19 is disposed at the general interface end of the air pipe 17, and the liquid pipe switch valve 20 is disposed at the general interface end of the liquid pipe 18. In this embodiment, the complexity of the system circuit can be reduced by the mutual cooperation of the first reversing valve 16, the air pipe switch valve 19, and the liquid pipe switch valve 20. For example, the air pipe switch valve 19 and the liquid pipe switch valve 20 are stop valves or solenoid valves, and the stop valves and the solenoid valves herein are only examples and are not intended to limit the present application.

[0073] In some embodiments, the heat pump system further includes a second throttling device 21, wherein the refrigerant outlet 122 is further connected to the general interface end of the gas pipe 17 through a pipeline after passing through the first reversing valve 16, and the general interface end of the liquid pipe 18 is further connected to the second refrigerant interface 132 through the second throttling device 21, and the first refrigerant interface 131 is further connected to the inlet 111 of the compressor 11 through a pipeline. For example, the second throttling device 21 is an electronic expansion valve or a thermal expansion valve, and the electronic expansion valve and the thermal expansion valve here are only examples and are not intended to limit the present application.

[0074] This embodiment can realize automatic switching between hot water production and pure hot water production during heating, further improving the flexibility in different modes.

[0075] In some embodiments, the first reversing valve 16 includes a first valve port 161, a second valve port 162 and a third valve port 163. For example, the first reversing valve 16 is a three-way valve, which is only an example and is not intended to limit the present application.

[0076] The first valve port 161 is connected to the refrigerant outlet 122. The second valve port 162 is connected to the total interface end of the liquid pipe 18 (specifically, the first end of the liquid pipe switch valve 20) through a pipeline. The third valve port 163 is connected to the first refrigerant interface 131 and the total interface end of the gas pipe 17 (specifically, the first end of the gas pipe switch valve 19) through a pipeline.

[0077] Among them, when the first valve port 161 is connected with the second valve port 162, and the second valve port 162 is connected with the liquid pipe 18 through a pipeline, that is, in the refrigeration and full heat recovery domestic hot water mode, the refrigerant comes out of the compressor 11 and passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 161, the second valve port 162, the liquid pipe 18, the first throttling device 15, the third refrigerant interface 141, the fourth refrigerant interface 142 and the air pipe 17 to form a refrigeration refrigerant circuit, and all the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12.

[0078] When the first valve port 161 is connected with the third valve port 163, and the third valve port 163 is connected with the first refrigerant interface 131 through a pipeline, that is, in the refrigeration and waste heat recovery (also called partial heat recovery) domestic hot water mode, the refrigerant comes out of the compressor 11 and passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 161, the third valve port 163, the first refrigerant interface 131, the second refrigerant interface 132, the liquid pipe 18, the first throttling device 15, the third refrigerant interface 141, the fourth refrigerant interface 142 and the gas pipe 17 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 12.

[0079] When the first valve port 161 is connected with the third valve port 163, and the third valve port 163 is connected with the air pipe 17 through a pipeline, that is, in the heating plus domestic hot water mode, the refrigerant comes out of the compressor 11 and passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 161, the third valve port 163, the air pipe 17, the fourth refrigerant interface 142, the third refrigerant interface 141, the first throttling device 15, the liquid pipe 18, the second throttling device 21, the second refrigerant interface 132 and the first refrigerant interface 131 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 12.

[0080] When the first valve port 161 is connected with the second valve port 162, and the second valve port 162 is connected with the second refrigerant interface 132 through the second throttling device 21, that is, in the pure hot water mode, the refrigerant comes out of the compressor 11 and passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 161, the second valve port 162, the second throttling device 21, the second refrigerant interface 132 and the first refrigerant interface 131 to form a pure hot water 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 12.

[0081] In some embodiments, the domestic hot water heat exchanger 12 further includes a first water inlet 123 and a first water outlet 124 connected to the first water inlet 123. The heat pump system further includes a domestic water tank 22, which is used to store domestic water. The domestic water tank 22 is connected to the first water inlet 123 and the first water outlet 124, respectively. All or at least part of the heat of the refrigerant output by the compressor 11 is heat-exchanged with the water in the domestic water tank 22 in the domestic hot water heat exchanger 12 to prepare hot water. Specifically, the domestic water tank 22 includes a cold water inlet 221, a water outlet 222, a return water outlet 223 and a hot water outlet 224. The water outlet 222 is connected to the first water inlet 123, and the first water outlet 124 is connected to the return water outlet 223.

[0082] In some embodiments, the heat pump system also includes a hot water pump 23, which is arranged in the water inlet pipe (the pipe connecting the water outlet 222 and the first water inlet 123) or the water outlet pipe (the pipe connecting the first water outlet 124 and the return water port 223) of the domestic hot water heat exchanger 12, and the hot water pump 23 is used to provide power for the water circulation between the domestic hot water heat exchanger 12 and the domestic water tank 22.

[0083] Specifically, in summer, when preparing hot water while cooling, if the water is initially 30°C and the target is to be heated to 60°C, the waste heat recovery mode can be used, but the hot water production speed is slow. Therefore, in order to solve the problem of slow hot water production speed and affecting the reversing of the third reversing valve 28 in the cooling and waste heat recovery modes, a full heat recovery mode is provided. All the heat of the refrigerant output by the compressor 11 is heat exchanged with the water in the domestic water tank 22 in the domestic hot water heat exchanger 12, which can increase the hot water production speed and quickly prepare hot water. The refrigerant becomes liquid refrigerant after coming out of the refrigerant outlet 122, and then enters the first throttling device 15 after passing through the second valve port 162, the liquid pipe switch valve 20 and the liquid pipe 18, and enters the indoor unit 14 after throttling and cooling by the first throttling device 15. 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, it can be switched to the waste heat recovery mode. If the water is initially 50°C and the target is to be heated to 60°C, the waste heat recovery mode can be directly used. It should be noted that the temperature data listed above are only for illustration and are not intended to limit the present application.

[0084] In some embodiments, the heat pump system also includes a liquid storage container 24, which is arranged on the pipeline between the second throttling device 21 and the total interface end of the liquid pipe 18, specifically, the second refrigerant interface 132 is connected to the total interface end of the liquid pipe 18 (specifically the first end of the liquid pipe switch valve 20) through the liquid storage container 24, and the total interface end of the liquid pipe 18 (specifically the first end of the liquid pipe switch valve 20) is connected to the second refrigerant interface 132 through the liquid storage container 24 and the second throttling device 21.

[0085] In some embodiments, the heat pump system further includes a first one-way valve 25, the inlet and outlet of the first one-way valve 25 are connected to the two ends of the second throttling device 21, specifically, the second refrigerant interface 132 is connected to the total interface end of the liquid pipe 18 (specifically, the first end of the liquid pipe switch valve 20) through the first one-way valve 25 (specifically, through the first one-way valve 25 and the liquid storage container 24), and the conduction direction of the first one-way valve 25 is toward the total interface end of the liquid pipe 18. It should be noted that the direction of the first one-way valve 25 refers to the flow direction of the refrigerant, not the direction of the spatial position. In addition, the total interface end of the liquid pipe 18 (specifically, the first end of the liquid pipe switch valve 20) is connected to the second refrigerant interface 132 through the second throttling device 21 (specifically, through the liquid storage container 24 and the second throttling device 21).

[0086] In the above-mentioned refrigeration and waste heat recovery domestic hot water mode, the refrigerant comes out of the compressor 11 and passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 161, the third valve port 163, the first refrigerant interface 131, the second refrigerant interface 132, the first one-way valve 25, the liquid pipe 18, the first throttling device 15, the third refrigerant interface 141, the fourth refrigerant interface 142 and the gas pipe 17 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 12.

[0087] In some embodiments, the heat pump system further includes a second one-way valve 26, and the refrigerant outlet 122 is connected to the total interface end of the liquid pipe 18 (specifically, the first end of the liquid pipe switch valve 20) through the second one-way valve 26 after passing through the first reversing valve 16, and the conduction direction of the second one-way valve 26 is toward the total interface end of the liquid pipe 18. It should be noted here that the direction of the second one-way valve 26 refers to the flow direction of the refrigerant, not the direction of the spatial position.

[0088] In some embodiments, the heat pump system also includes a second reversing valve 27, which is used to regulate the amount of refrigerant entering the domestic hot water heat exchanger 12 after the refrigerant comes out of the compressor 11. The outlet 112 of the compressor 11 is connected to the refrigerant inlet 121 after passing through the second reversing valve 27, and the outlet 112 of the compressor 11 is connected to the first refrigerant interface 131 and the total interface end of the air pipe 17 (specifically the first end of the air pipe switch valve 19) through a pipeline after passing through the second reversing valve 27.

[0089] In some embodiments, the second reversing valve 27 includes a fourth valve port 271, a fifth valve port 272 and a sixth valve port 273. For example, the second reversing valve 27 is a three-way valve, which is only an example and is not intended to limit the present application.

[0090] The fourth valve port 271 is connected to the outlet 112 of the compressor 11. The fifth valve port 272 is connected to the refrigerant inlet 121. The sixth valve port 273 is connected to the first refrigerant interface 131 and the total interface end of the air pipe 17 (specifically, the first end of the air pipe switch valve 19) through a pipeline.

[0091] When the fourth valve port 271 is connected to the fifth valve port 272, the outlet 112 of the compressor 11 is connected to the refrigerant inlet 121. When the fourth valve port 271 is connected to the sixth valve port 273, the outlet 112 of the compressor 11 is connected to the first refrigerant interface 131 or the main interface end of the air pipe 17 (specifically, the first end of the air pipe switch valve 19) through a pipeline.

[0092] In some embodiments, the heat pump system further includes a third reversing valve 28, and the third reversing valve 28 is used to switch between the cooling mode and the heating mode. The first refrigerant interface 131 is connected to the first reversing valve 16 after passing through the third reversing valve 28, and / or the first refrigerant interface 131 is connected to the outlet 112 of the compressor 11 through a pipeline after passing through the third reversing valve 28. The total interface end of the air pipe 17 is connected to the first reversing valve 16 after passing through the third reversing valve 28, and / or the total interface end of the air pipe 17 is connected to the outlet 112 of the compressor 11 through a pipeline after passing through the third reversing valve 28. The first refrigerant interface 131 and the total interface end of the air pipe 17 are connected to the inlet 111 of the compressor 11 through a pipeline after passing through the third reversing valve 28.

[0093] In some embodiments, the third reversing valve 28 includes a seventh valve port 281, an eighth valve port 282, a ninth valve port 283 and a tenth valve port 284. For example, the third reversing valve 28 is a four-way valve, which is only an example and is not intended to limit the present application.

[0094] The seventh valve port 281 is connected to the first reversing valve 16 (specifically, the third valve port 163 of the first reversing valve 16), and / or the seventh valve port 281 is connected to the outlet 112 of the compressor 11 through a pipeline (specifically, through the sixth valve port 273 and the fourth valve port 271 of the second reversing valve 27). The eighth valve port 282 is connected to the first refrigerant interface 131. The ninth valve port 283 is connected to the inlet 111 of the compressor 11 through a pipeline. The tenth valve port 284 is connected to the total interface end of the air pipe 17 (specifically, the first end of the air pipe switch valve 19).

[0095] Among them, when the seventh valve port 281 is connected with the eighth valve port 282, the first refrigerant interface 131 is connected with the first reversing valve 16 (specifically, the third valve port 163 of the first reversing valve 16), and / or the first refrigerant interface 131 is connected with the outlet 112 of the compressor 11 through a pipeline (specifically, through the sixth valve port 273 and the fourth valve port 271 of the second reversing valve 27).

[0096] When the seventh valve port 281 is connected to the tenth valve port 284, the total interface end of the air pipe 17 (specifically the first end of the air pipe switch valve 19) is connected to the first reversing valve 16 (specifically the third valve port 163 of the first reversing valve 16), and / or the total interface end of the air pipe 17 (specifically the first end of the air pipe switch valve 19) is connected to the outlet 112 of the compressor 11 through a pipeline (specifically through the sixth valve port 273 and the fourth valve port 271 of the second reversing valve 27).

[0097] When the eighth valve port 282 is connected to the ninth valve port 283 , the first refrigerant interface 131 is connected to the inlet 111 of the compressor 11 through a pipeline.

[0098] When the tenth valve port 284 is connected to the ninth valve port 283 , the main interface end of the air pipe 17 (specifically, the first end of the air pipe switch valve 19 ) is connected to the inlet 111 of the compressor 11 through a pipeline.

[0099] In some embodiments, the heat pump system further includes a gas-liquid separator 29 , which is used to separate gaseous refrigerant and liquid refrigerant. The gas-liquid separator 29 is disposed at the inlet 111 of the compressor 11 .

[0100] In some embodiments, the heat pump system also includes an oil separator 30 and an oil return pipe 31. The oil separator 30 is disposed at the outlet 112 end of the compressor 11. The oil separator 30 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 31.

[0101] Completely, as Figure 1As shown, the connection relationship between the above-mentioned components is as follows: the outlet 112 of the compressor 11 is connected to the fourth valve port 271 of the second reversing valve 27 through the oil separator 30, the fifth valve port 272 of the second reversing valve 27 is connected to the refrigerant inlet 121 of the domestic hot water heat exchanger 12, and the sixth valve port 273 of the second reversing valve 27 is connected to the seventh valve port 281 of the third reversing valve 28; the refrigerant outlet 122 of the domestic hot water heat exchanger 12 is connected to the first valve port 161 of the first reversing valve 16, and the refrigerant outlet 122 of the domestic hot water heat exchanger 12 is connected to the first valve port 161 of the first reversing valve 16. The second valve port 162 is connected to the first end of the liquid pipe switch valve 20 via the second non-return valve 26, and the third valve port 163 of the first reversing valve 16 is connected to the seventh valve port 281 of the third reversing valve 28; the water outlet 222 of the domestic water tank 22 is connected to the first water inlet 123 of the domestic hot water heat exchanger 12 via the hot water pump 23, and the first water outlet 124 of the domestic hot water heat exchanger 12 is connected to the return water port 223 of the domestic water tank 22; the eighth valve port 282 of the third reversing valve 28 is connected to the outdoor heat exchanger 1 3 is connected to the first refrigerant interface 131 of the outdoor heat exchanger 13; the second refrigerant interface 132 of the outdoor heat exchanger 13 is connected to the first end of the liquid pipe switch valve 20 through the first one-way valve 25 and the liquid storage container 24, and the conduction direction of the first one-way valve 25 is toward the first end of the liquid pipe switch valve 20; the first end of the liquid pipe switch valve 20 is connected to the second refrigerant interface 132 of the outdoor heat exchanger 13 through the liquid storage container 24 and the second throttling device 21; the second end of the liquid pipe switch valve 20 is connected to the liquid pipe 18; each group of the indoor In the compressor 14 and the first throttling device 15, the third refrigerant interface 141 is connected to the corresponding branch interface end in the liquid pipe 18 through the first throttling device 15, and the fourth refrigerant interface 142 is connected to the corresponding branch interface end in the gas pipe 17; the second end of the gas pipe switch valve 19 is connected to the gas pipe 17, the first end of the gas pipe switch valve 19 is connected to the tenth valve port 284 of the third reversing valve 28, and the ninth valve port 283 of the third reversing valve 28 is connected to the inlet 111 of the compressor 11 through the gas-liquid separator 29. It should be noted here that the connection between the above ports, between the ports and the components, or between the components is only a physical structural connection, and does not uniquely define the connectivity relationship and refrigerant flow relationship therein.

[0102] In different situations, the heat pump system will correspond to different valve ports, as follows:

[0103] like Figure 2As shown, in the cooling and full heat recovery domestic hot water mode, the fourth valve port 271 of the second reversing valve 27 is connected with the fifth valve port 272, the first valve port 161 of the first reversing valve 16 is connected with the second valve port 162, the tenth valve port 284 of the third reversing valve 28 is connected with the ninth valve port 283, the liquid pipe switch valve 20 and the gas pipe switch valve 19 are opened, the first throttling device 15 is opened, and the second throttling device 21 is closed. That is, when hot water needs to be prepared quickly in the cooling mode, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 first passes through the fourth valve port 271 and the fifth valve port 272 of the second 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 22 in the domestic hot water heat exchanger 12 and becomes a 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 first valve port 161 and the second valve port 162 of the first reversing valve 16 and then enters the liquid pipe 18 through the second one-way valve 26 and the liquid pipe switch valve 20. The medium-temperature liquid refrigerant enters the liquid pipe 18. The refrigerant enters the first throttling device 15 of each group, and after throttling and cooling by the first throttling device 15, it becomes a low-temperature liquid refrigerant with a lower temperature, and then enters the third refrigerant interface 141 of the indoor unit 14. The low-temperature liquid refrigerant exchanges heat with the indoor air in the indoor unit 14, and the low-temperature liquid refrigerant absorbs heat from the indoor air and evaporates to become a low-temperature gaseous refrigerant. The indoor unit 14 blows out cold air, and the low-temperature gaseous refrigerant output by the fourth refrigerant interface 142 of the indoor unit 14 of each group enters the air pipe 17, passes through the air pipe switch valve 19, the tenth valve port 284 of the third reversing valve 28 and the ninth valve port 283, and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 29, and the cycle repeats. The domestic hot water heat exchanger 12 is connected to the domestic water tank 22, so that all the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 13 can be recovered and utilized during summer cooling, avoiding the waste of all heat in the heat exchange between the outdoor heat exchanger 13 and the air. The recovered heat is exchanged with the water in the domestic water tank 22 in the domestic hot water heat exchanger 12 to quickly prepare hot water, improve energy utilization, and increase the speed of hot water production.

[0104] like Figure 3As shown, in the cooling and waste heat recovery domestic hot water mode, the fourth valve port 271 of the second reversing valve 27 is connected with the fifth valve port 272, the first valve port 161 of the first reversing valve 16 is connected with the third valve port 163, the seventh valve port 281 of the third reversing valve 28 is connected with the eighth valve port 282, the tenth valve port 284 of the third reversing valve 28 is connected with the ninth valve port 283, the liquid pipe switch valve 20 and the gas pipe switch valve 19 are opened, the first throttling device 15 is opened, and the second throttling device 21 is closed. That is, when hot water needs to be prepared in the cooling mode, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 first passes through the fourth valve port 271 and the fifth valve port 272 of the second 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 22 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 first valve port 161 and the third valve port 163 of the first reversing valve 16 and the seventh valve port 281 and the eighth valve port 282 of the third reversing valve 28 and then enters the first refrigerant interface 131 of the outdoor heat exchanger 13. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 13 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant interface 132 of the outdoor heat exchanger 13 passes through the The medium-temperature liquid refrigerant enters the liquid storage container 24 after passing through the first one-way valve 25. The medium-temperature liquid refrigerant output by the liquid storage container 24 enters the liquid pipe 18 through the liquid pipe switch valve 20. The medium-temperature liquid refrigerant enters the first throttling device 15 of each group in the liquid pipe 18. After throttling and cooling by the first throttling device 15, it becomes a low-temperature liquid refrigerant with a lower temperature, and then enters the third refrigerant interface 141 of the indoor unit 14. The low-temperature liquid refrigerant exchanges heat with the indoor air in the indoor unit 14, and the low-temperature liquid refrigerant absorbs heat from the indoor air and evaporates to become a low-temperature gaseous refrigerant. The indoor unit 14 blows out cold air. The low-temperature gaseous refrigerant output by the fourth refrigerant interface 142 of the indoor unit 14 of each group enters the air pipe 17, passes through the air pipe switch valve 19, the tenth valve port 284 of the third reversing valve 28 and the ninth valve port 283, and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 12 is connected to the domestic water tank 22, so that at least part of the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 13 can be recovered and utilized during summer cooling, thereby avoiding wasting all the heat in the heat exchange between the outdoor heat exchanger 13 and the air. The recovered heat is exchanged with the water in the domestic water tank 22 in the domestic hot water heat exchanger 12 to prepare hot water, thereby improving energy utilization.

[0105] Specifically, Figure 3 and Figure 2 The difference between the shown embodiments is that Figure 3 In order to recycle at least part of the condensation heat originally used for heat exchange with air by the outdoor heat exchanger 13, Figure 2 The purpose is to recover and utilize all the condensation heat originally used by the outdoor heat exchanger 13 for heat exchange with the air.

[0106] like Figure 4As shown, in the cooling mode and the waste heat recovery domestic hot water mode, the fourth valve port 271 of the second reversing valve 27 is respectively connected with the fifth valve port 272 and the sixth valve port 273, the first valve port 161 of the first reversing valve 16 is connected with the third valve port 163, the seventh valve port 281 of the third reversing valve 28 is connected with the eighth valve port 282, the tenth valve port 284 of the third reversing valve 28 is connected with the ninth valve port 283, the liquid pipe switch valve 20 and the gas pipe switch valve 19 are opened, the first throttling device 15 is opened, and the second throttling device 21 is closed. That is, when hot water needs to be prepared in the cooling 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 fourth valve port 271 and the fifth valve port 272 of the second reversing valve 27, and enters the first refrigerant interface 131 of the outdoor heat exchanger 13 after passing through the fourth valve port 271 and the sixth valve port 273 of the second reversing valve 27 and the seventh valve port 281 and the eighth valve port 282 of the third reversing valve 28. The high-temperature gaseous refrigerant The gaseous refrigerant exchanges heat with the water in the domestic water tank 22 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 first valve port 161 and the third valve port 163 of the first reversing valve 16 and the seventh valve port 281 and the eighth valve port 282 of the third reversing valve 28 and then enters the first refrigerant interface 131 of the outdoor heat exchanger 13. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 13. The medium-temperature liquid refrigerant outputted from the second refrigerant interface 132 of the outdoor heat exchanger 13 passes through the first one-way valve 25 and enters the liquid storage container 24. The medium-temperature liquid refrigerant outputted from the liquid storage container 24 passes through the liquid pipe switch valve 20 and enters the liquid pipe 18. The medium-temperature liquid refrigerant enters the first throttling device 15 of each group in the liquid pipe 18, and after throttling and cooling by the first throttling device 15, it becomes a low-temperature liquid refrigerant with a lower temperature, and then enters the third refrigerant interface 1 of the indoor unit 14. 41. The low-temperature liquid refrigerant exchanges heat with the indoor air in the indoor unit 14, and the low-temperature liquid refrigerant absorbs heat from the indoor air and evaporates to become a low-temperature gaseous refrigerant. The indoor unit 14 blows out cold air. The low-temperature gaseous refrigerant output by the fourth refrigerant interface 142 of each group of the indoor units 14 enters the air pipe 17, passes through the air pipe switch valve 19, the tenth valve port 284 of the third reversing valve 28 and the ninth valve port 283, and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 29, and repeats the cycle.The domestic hot water heat exchanger 12 is connected to the domestic water tank 22, so that at least part of the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 13 can be recovered and utilized during summer cooling, thereby avoiding wasting all the heat in the heat exchange between the outdoor heat exchanger 13 and the air. The recovered heat is exchanged with the water in the domestic water tank 22 in the domestic hot water heat exchanger 12 to prepare hot water, thereby improving energy utilization.

[0107] Specifically, Figure 4 and Figure 3 The difference between the shown embodiments is that Figure 4 In the embodiment shown, an additional refrigerant path enters the outdoor heat exchanger 13 after passing through the fourth valve port 271 and the sixth valve port 273 of the second reversing valve 27 and the seventh valve port 281 and the eighth valve port 282 of the third reversing valve 28, so that the amount of refrigerant entering the domestic hot water heat exchanger 12 can be better regulated, and the refrigerant coming out of the compressor 11 directly reaching the third reversing valve 28 can be guaranteed to be the gaseous refrigerant, while the refrigerant passing through the domestic hot water heat exchanger 12 may contain liquid refrigerant after heat exchange. The pure gaseous refrigerant can better ensure that the third reversing valve 28 has sufficient pressure difference for reversing, so the pressure loss of the refrigerant pipeline is small, and the second reversing valve 27 is not easily affected by impurities, so that the system runs stably.

[0108] like Figure 5As shown, in the heating and domestic hot water mode, the fourth valve port 271 of the second reversing valve 27 is connected to the fifth valve port 272, the first valve port 161 of the first reversing valve 16 is connected to the third valve port 163, the seventh valve port 281 of the third reversing valve 28 is connected to the tenth valve port 284, the eighth valve port 282 of the third reversing valve 28 is connected to the ninth valve port 283, the liquid pipe switch valve 20 and the gas pipe switch valve 19 are opened, and the first throttling device 15 and the second throttling device 21 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 fourth valve port 271 and the fifth valve port 272 of the second 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 22 in the domestic hot water heat exchanger 12 and becomes a medium-temperature gaseous refrigerant after preparing hot water. The refrigerant outlet 121 of the domestic hot water heat exchanger 12 The medium-temperature gaseous refrigerant outputted from 22 passes through the first valve port 161 and the third valve port 163 of the first reversing valve 16 and the seventh valve port 281 and the tenth valve port 284 of the third reversing valve 28, and then enters the gas pipe 17 through the gas pipe switch valve 19. The medium-temperature gaseous refrigerant enters the fourth refrigerant interface 142 of the indoor unit 14 of each group in the gas pipe 17. The medium-temperature gaseous refrigerant performs heat exchange with the indoor air in the indoor unit 14, and the medium-temperature gaseous refrigerant After releasing heat to the indoor air, it condenses and becomes a medium-temperature liquid refrigerant. The indoor unit 14 blows out hot air. The medium-temperature liquid refrigerant output by the third refrigerant interface 141 of the indoor unit 14 becomes a low-temperature liquid refrigerant after throttling and cooling by the first throttling device 15. Then, the low-temperature liquid refrigerant output by the first throttling device 15 of each group enters the liquid pipe 18, passes through the liquid pipe switch valve 20 and the liquid storage container 24, enters the second throttling device 21 for throttling and cooling again, and becomes a low-temperature liquid refrigerant with a lower temperature and enters the second refrigerant interface 132 of the outdoor heat exchanger 13. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 13 and becomes a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output by the first refrigerant interface 131 of the outdoor heat exchanger 13 passes through the eighth valve port 282 and the ninth valve port 283 of the third reversing valve 28, and then passes through the gas-liquid separator 29 and returns to the inlet 111 of the compressor 11, and circulates back and forth. The domestic hot water heat exchanger 12 is connected to the domestic water tank 22, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0109] like Figure 6As shown, in the heating and domestic hot water mode, the fourth valve port 271 of the second reversing valve 27 is respectively connected with the fifth valve port 272 and the sixth valve port 273, the first valve port 161 of the first reversing valve 16 is connected with the third valve port 163, the seventh valve port 281 of the third reversing valve 28 is connected with the tenth valve port 284, the eighth valve port 282 of the third reversing valve 28 is connected with the ninth valve port 283, the liquid pipe switch valve 20 and the gas pipe switch valve 19 are opened, and the first throttling device 15 and the second throttling device 21 are opened. That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant outputted from the outlet 112 of the compressor 11 enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12 through the fourth valve port 271 and the fifth valve port 272 of the second reversing valve 27, and enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12 through the fourth valve port 271 and the sixth valve port 273 of the second reversing valve 27, the seventh valve port 281 and the tenth valve port 284 of the third reversing valve 28, and the gas pipe switch valve 19. The high-temperature gaseous refrigerant The medium-temperature gaseous refrigerant is heat-exchanged with the water in the domestic water tank 22 in the domestic hot water heat exchanger 12, and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant outputted from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the first valve port 161 and the third valve port 163 of the first reversing valve 16 and the seventh valve port 281 and the tenth valve port 284 of the third reversing valve 28, and then enters the gas pipe 17 through the gas pipe switch valve 19. The medium-temperature gaseous refrigerant enters the indoor unit 14 of each group in the gas pipe 17. The fourth refrigerant interface 142 of the indoor unit 14 performs heat exchange with the indoor air, and the medium-temperature gaseous refrigerant releases heat to the indoor air and condenses into a medium-temperature liquid refrigerant. The indoor unit 14 blows out hot air. The medium-temperature liquid refrigerant output by the third refrigerant interface 141 of the indoor unit 14 is throttled and cooled by the first throttling device 15 to become a low-temperature liquid refrigerant. Then, the low-temperature liquid refrigerant output by the first throttling device 15 of each group enters the liquid pipe 18, passes through the liquid pipe switch valve 20 and the liquid storage container 24, and then enters The second throttling device 21 throttles and cools down again, and becomes a low-temperature liquid refrigerant with a lower temperature and enters the second refrigerant interface 132 of the outdoor heat exchanger 13. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 13 and becomes a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output by the first refrigerant interface 131 of the outdoor heat exchanger 13 passes through the eighth valve port 282 and the ninth valve port 283 of the third reversing valve 28 and then passes through the gas-liquid separator 29 and returns to the inlet 111 of the compressor 11, and the cycle repeats. The domestic hot water heat exchanger 12 is connected to the domestic water tank 22, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0110] Specifically, Figure 6 and Figure 5 The difference between the shown embodiments is that Figure 6 In the embodiment shown, an additional path is provided to enter the air pipe 17 after passing through the fourth valve port 271 and the sixth valve port 273 of the second reversing valve 27, the seventh valve port 281 and the tenth valve port 284 of the third reversing valve 28 and the air pipe switch valve 19, so that the amount of refrigerant entering the domestic hot water heat exchanger 12 can be better regulated, and the path of refrigerant coming out of the compressor 11 directly reaching the third reversing valve 28 can be guaranteed to be the gaseous refrigerant, while the refrigerant passing through the domestic hot water heat exchanger 12 may contain liquid refrigerant after heat exchange. The pure gaseous refrigerant can better ensure that the third reversing valve 28 has sufficient pressure difference for reversing, so the pressure loss of the refrigerant pipeline is small, and the second reversing valve 27 is not easily affected by impurities, so that the system runs stably.

[0111] like Figure 7As shown, in the pure hot water mode, the fourth valve port 271 of the second reversing valve 27 is connected with the fifth valve port 272, the first valve port 161 of the first reversing valve 16 is connected with the second valve port 162, the eighth valve port 282 of the third reversing valve 28 is connected with the ninth valve port 283, the liquid pipe switch valve 20 is closed, and the second throttling device 21 is 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 fourth valve port 271 and the fifth valve port 272 of the second 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 22 in the domestic hot water heat exchanger 12 to prepare hot water. After preparing hot water, it becomes a 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 first valve port 161 and the second valve port 162 of the first reversing valve 16 and then enters the The liquid storage container 24, the medium-temperature liquid refrigerant output by the liquid storage container 24 is throttled and cooled by the second throttling device 21 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant interface 132 of the outdoor heat exchanger 13, and the low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 13 to become a low-temperature gaseous refrigerant, and the low-temperature gaseous refrigerant output by the first refrigerant interface 131 of the outdoor heat exchanger 13 passes through the eighth valve port 282 and the ninth valve port 283 of the third reversing valve 28 and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 12 is connected to the domestic water tank 22, so that all the heat from the compressor 11 can be used alone in the domestic hot water heat exchanger 12 for heat exchange with the water in the domestic water tank 22, and energy is used in a targeted manner. When making hot water, the circuit of the refrigerant is shortened, and it does not need to pass through the indoor unit 14, and the heat exchange efficiency is higher.

[0112] like Figure 8As shown, in the cooling mode, the fourth valve port 271 of the second reversing valve 27 is connected to the sixth valve port 273, the seventh valve port 281 of the third reversing valve 28 is connected to the eighth valve port 282, the tenth valve port 284 of the third reversing valve 28 is connected to the ninth valve port 283, the first throttling device 15 is opened, the second throttling device 21 is closed, and the liquid pipe switch valve 20 and the gas pipe switch valve 19 are opened. That is, when cooling alone is performed in summer, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 passes through the fourth valve port 271 and the sixth valve port 273 of the second reversing valve 27 and the seventh valve port 281 and the eighth valve port 282 of the third reversing valve 28 and then enters the first refrigerant interface 131 of the outdoor heat exchanger 13. The high-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 13 to become a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant interface 132 of the outdoor heat exchanger 13 passes through the first one-way valve 25 and then enters the liquid storage container 24. The medium-temperature liquid refrigerant output from the liquid storage container 24 passes through the liquid pipe switch valve 20 and enters the liquid pipe 18. The medium-temperature liquid refrigerant in the liquid pipe 18 The refrigerant enters the first throttling device 15 of each group, and after throttling and cooling by the first throttling device 15, it becomes a low-temperature liquid refrigerant with a lower temperature, and then enters the third refrigerant interface 141 of the indoor unit 14. The low-temperature liquid refrigerant exchanges heat with the indoor air in the indoor unit 14, and the low-temperature liquid refrigerant absorbs heat from the indoor air and evaporates to become a low-temperature gaseous refrigerant. The indoor unit 14 blows out cold air, and the low-temperature gaseous refrigerant output by the fourth refrigerant interface 142 of the indoor unit 14 of each group enters the air pipe 17, passes through the air pipe switch valve 19, the tenth valve port 284 of the third reversing valve 28 and the ninth valve port 283, and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 29, and the cycle is repeated.

[0113] like Fig. 9As shown, in the heating mode, the fourth valve port 271 of the second reversing valve 27 is connected to the sixth valve port 273, the seventh valve port 281 of the third reversing valve 28 is connected to the tenth valve port 284, the eighth valve port 282 of the third reversing valve 28 is connected to the ninth valve port 283, the first throttling device 15 and the second throttling device 21 are opened, and the liquid pipe switch valve 20 and the gas pipe switch valve 19 are opened. That is, when heating alone is used in winter, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 passes through the fourth valve port 271 and the sixth valve port 273 of the second reversing valve 27, the seventh valve port 281 and the tenth valve port 284 of the third reversing valve 28 and the air pipe switch valve 19 and then enters the air pipe 17. The high-temperature gaseous refrigerant enters the fourth refrigerant interface 142 of each group of the indoor unit 14 in the air pipe 17. The medium-temperature gaseous refrigerant exchanges heat with the indoor air in the indoor unit 14, and the medium-temperature gaseous refrigerant releases heat to the indoor air and then condenses into medium-temperature liquid refrigerant. The indoor unit 14 blows out hot air, and the medium-temperature liquid refrigerant output from the third refrigerant interface 141 of the indoor unit 14 passes through the first throttling device After throttling and cooling, the low-temperature liquid refrigerant 15 becomes a low-temperature liquid refrigerant. Then, the low-temperature liquid refrigerant output by the first throttling device 15 of each group enters the liquid pipe 18, passes through the liquid pipe switch valve 20 and the liquid storage container 24, enters the second throttling device 21 for throttling and cooling again, and becomes a low-temperature liquid refrigerant with a lower temperature and enters the second refrigerant interface 132 of the outdoor heat exchanger 13. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 13 and becomes a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output by the first refrigerant interface 131 of the outdoor heat exchanger 13 passes through the eighth valve port 282 and the ninth valve port 283 of the third reversing valve 28, and then passes through the gas-liquid separator 29 and returns to the inlet 111 of the compressor 11, and the cycle is repeated.

[0114] It should be noted here that the above-mentioned high, medium and low temperatures are only relative expressions, and the gaseous refrigerant can also refer to a gas-liquid two-phase state or a gaseous state, which is not limited here.

[0115] In some embodiments, the compressor 11, the domestic hot water heat exchanger 12, the outdoor heat exchanger 13, the first reversing valve 16, the gas pipe switch valve 19, the liquid pipe switch valve 20 and the second throttling device 21, the domestic water tank 22, the hot water pump 23, the liquid storage container 24, the first one-way valve 25, the second one-way valve 26, the second reversing valve 27, the third reversing valve 28 and the gas-liquid separator 29 are all integrated in the outdoor unit.

[0116] In some other embodiments, the first one-way valve 25 and the second one-way valve 26 may be replaced by a first switch valve and a second switch valve. For example, the first switch valve and the second switch valve are stop valves or solenoid valves, and the stop valves and the solenoid valves are only examples and are not intended to limit the present application.

[0117] Wherein, the switching states of the first switch valve and the second switch valve in different modes are:

[0118] In the above-mentioned refrigeration and full heat recovery 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 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.

[0119] By implementing the utility model, the following beneficial effects are achieved:

[0120] The utility model realizes the combination of a multi-split system and domestic hot water by connecting the gas pipe 17 and the liquid pipe 18 in parallel. At the same time, the first reversing valve 16 can realize the automatic switching between full heat recovery and partial heat recovery during refrigeration, thereby improving the flexibility in different modes, thus ensuring both the heat recovery capacity and the temperature of the hot water after heat recovery.

[0121] It can be understood that the above embodiments only express some implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the utility model; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments; therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A 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; An outdoor heat exchanger, the outdoor heat exchanger comprising a first refrigerant interface and a second refrigerant interface connected to the first refrigerant interface; At least two groups of indoor units and a first throttling device, wherein the indoor units include a third refrigerant interface and a fourth refrigerant interface connected to the third refrigerant interface; a first reversing valve, the first reversing valve being used to switch all or at least part of the heat of the refrigerant to be exchanged in the domestic hot water heat exchanger; air and liquid pipes; Wherein, the refrigerant inlet is connected to the outlet of the compressor through a pipeline; The refrigerant outlet is connected to the main interface end of the liquid pipe through a pipeline after passing through the first reversing valve, and the refrigerant outlet is connected to the first refrigerant interface through a pipeline after passing through the first reversing valve; The second refrigerant interface is connected to the main interface end of the liquid pipe through a pipeline; In each group of the indoor unit and the first throttling device, the third refrigerant interface is connected to the corresponding branch interface end in the liquid pipe through the first throttling device, and the fourth refrigerant interface is connected to the corresponding branch interface end in the gas pipe; The main interface end of the air pipe is connected to the inlet of the compressor through a pipeline.

2. The heat pump system according to claim 1, characterized in that: The heat pump system further comprises: 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.

3. The heat pump system according to claim 1, characterized in that: The heat pump system also includes a second throttling device; Among them, the refrigerant outlet is connected to the total interface end of the gas pipe through a pipeline after passing through the first reversing valve, the total interface end of the liquid pipe is connected to the second refrigerant interface through the second throttling device, and the first refrigerant interface is connected to the inlet of the compressor through a pipeline.

4. The heat pump system according to claim 3, characterized in that: The first reversing valve comprises a first valve port, a second valve port and a third valve port; The first valve port is connected to the refrigerant outlet; the second valve port is connected to the total interface end of the liquid pipe through a pipeline; the third valve port is connected to the first refrigerant interface and the total interface end of the gas pipe through a pipeline; Wherein, when the first valve port is connected with the second valve port, and the second valve port is connected with the liquid pipe through a pipeline, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the second valve port, the liquid pipe, the first throttling device, the third refrigerant interface, the fourth refrigerant interface 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; When the first valve port is connected to the third valve port, and the third valve port is connected to the first refrigerant interface through a pipeline, the refrigerant comes out of the compressor and passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the third valve port, the first refrigerant interface, the second refrigerant interface, the liquid pipe, the first throttling device, the third refrigerant interface, the fourth refrigerant interface and the gas pipe to form a refrigeration refrigerant circuit, and at least part of the heat of the refrigerant is exchanged in the domestic hot water heat exchanger; When the first valve port is connected to the third valve port, and the third valve port is connected to the air pipe through a pipeline, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the third valve port, the air pipe, the fourth refrigerant interface, the third refrigerant interface, the first throttling device, the liquid pipe, the second throttling device, the second refrigerant interface and the first refrigerant interface after coming out of the compressor to form a heating refrigerant circuit, and at least part of the heat of the refrigerant is heat exchanged in the domestic hot water heat exchanger; When the first valve port is connected with the second valve port, and the second valve port is connected with the second refrigerant interface through the second throttling device, 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 second throttling device, the second refrigerant interface and the first refrigerant interface 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.

5. The heat pump system according to claim 3, characterized in that: The heat pump system further comprises: A liquid storage container, wherein the second refrigerant interface is connected to the total interface end of the liquid pipe through the liquid storage container, and the total interface end of the liquid pipe is connected to the second refrigerant interface through the liquid storage container and the second throttling device.

6. The heat pump system according to claim 3, characterized in that: The heat pump system further comprises: A first one-way valve, the second refrigerant interface is connected to the total interface end of the liquid pipe through the first one-way valve, and the conducting direction of the first one-way valve is toward the total interface end of the liquid pipe.

7. The heat pump system according to claim 1, characterized in that: The heat pump system further comprises: A second one-way valve, the refrigerant outlet is connected to the total interface end of the liquid pipe through the second one-way valve after passing through the first reversing valve, and the conduction direction of the second one-way valve is toward the total interface end of the liquid pipe.

8. The heat pump system according to claim 3, characterized in that: The heat pump system further comprises: a second reversing valve, the second reversing valve comprising a fourth valve port, a fifth valve port and a sixth valve port; The fourth valve port is connected to the outlet of the compressor; the fifth valve port is connected to the refrigerant inlet; the sixth valve port is connected to the first refrigerant interface and the total interface end of the air pipe through a pipeline; Wherein, when the fourth valve port is connected to the fifth valve port, the outlet of the compressor is connected to the refrigerant inlet; When the fourth valve port is connected to the sixth valve port, the outlet of the compressor is connected to the first refrigerant interface or the main interface end of the air pipe through a pipeline.

9. The heat pump system according to claim 3, characterized in that: The heat pump system further comprises: a third reversing valve, the third reversing valve comprising a seventh valve port, an eighth valve port, a ninth valve port and a tenth valve port; The seventh valve port is connected to the first reversing valve; the eighth valve port is connected to the first refrigerant interface; the ninth valve port is connected to the inlet of the compressor through a pipeline; the tenth valve port is connected to the main interface end of the air pipe; Wherein, when the seventh valve port is connected to the eighth valve port, the first refrigerant interface is connected to the first reversing valve; When the seventh valve port is connected to the tenth valve port, the main interface end of the air pipe is connected to the first reversing valve; When the eighth valve port is connected to the ninth valve port, the first refrigerant interface is connected to the inlet of the compressor through a pipeline; When the tenth valve port is connected to the ninth valve port, the main interface end of the air pipe is connected to the inlet of the compressor through a pipeline.

10. The 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 heat pump system further comprises: A domestic water tank is connected to the first water inlet and the first water outlet respectively.

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