Air source heat pump system

Abstract

The utility model discloses an air source heat pump system which comprises a compressor, a domestic hot water heat exchanger, a first reversing valve, an outdoor side heat exchanger, an air conditioner side heat exchanger, a first one-way valve and a low-pressure gas-liquid separator. The domestic hot water heat exchanger comprises a refrigerant inlet and a refrigerant outlet. The outdoor heat exchanger comprises a first refrigerant port and a second refrigerant port. The air conditioner side heat exchanger comprises a third refrigerant port and a fourth refrigerant port. One path of an outlet of the compressor is connected with an inlet of the low-pressure gas-liquid separator through a bypass pipeline, and one path of the outlet of the compressor is connected with a refrigerant inlet, a first refrigerant port and a third refrigerant port through a first reversing valve. The refrigerant outlet is connected with the first refrigerant port and the third refrigerant port through a first one-way valve, and the conduction direction of the first one-way valve faces the first refrigerant port and the third refrigerant port. The second refrigerant port is connected with the fourth refrigerant port, the third refrigerant port and the first refrigerant port are connected with an inlet of the low-pressure gas-liquid separator, and an outlet of the low-pressure gas-liquid separator is connected with an inlet of the compressor. According to the compressor, frequent shutdown caused by excessive capacity can be avoided.

Description

Technical Field

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

[0002] The air source heat pump system of related technology generally has multiple operating modes. The frequency of the compressor will change in each operating mode. When the terminal temperature has reached the expected level, the capacity of the compressor will be excessive, which may easily lead to shutdown and restart after a period of shutdown. Frequent start and stop will affect the performance and life of the compressor, as well as the stability of the air source heat pump system. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide an air source heat pump system in view of at least one defect of the related technology mentioned in the above background technology: the compressor of the air source heat pump system is prone to shut down when the capacity is excessive.

[0004] The technical solution adopted by the utility model to solve the technical problem is to construct an air source 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] a first reversing valve;

[0008] an outdoor heat exchanger, the outdoor heat exchanger comprising a first refrigerant port and a second refrigerant port communicating with the first refrigerant port;

[0009] an air-conditioning side heat exchanger, the air-conditioning side heat exchanger comprising a third refrigerant port and a fourth refrigerant port connected to the third refrigerant port;

[0010] a first one-way valve and a low-pressure gas-liquid separator;

[0011] The outlet of the compressor is connected to the inlet of the low-pressure gas-liquid separator through a bypass line;

[0012] The outlet of the compressor is connected to the refrigerant inlet through the first reversing valve, and the outlet of the compressor is connected to the first refrigerant port and the third refrigerant port through the first reversing valve;

[0013] The refrigerant outlet is connected to the first refrigerant port and the third refrigerant port via the first one-way valve, and the conducting direction of the first one-way valve is toward the first refrigerant port and the third refrigerant port;

[0014] The second refrigerant port is connected to the fourth refrigerant port, the third refrigerant port and the first refrigerant port are connected to the inlet of the low-pressure gas-liquid separator, and the outlet of the low-pressure gas-liquid separator is connected to the inlet of the compressor.

[0015] In one embodiment, the air source heat pump system further comprises:

[0016] A first switch valve is provided on the bypass pipeline.

[0017] In one embodiment, the first switch valve is a normally closed two-way valve.

[0018] In one embodiment, at least a portion of the bypass line is a capillary tube.

[0019] In one embodiment, the outlet of the compressor is connected to the refrigerant inlet via the first reversing valve, the refrigerant outlet is connected to the first refrigerant port via the first one-way valve, and the third refrigerant port is connected to the inlet of the low-pressure gas-liquid separator. When the outdoor heat exchanger and the air-conditioning side heat exchanger are used for heat exchange, the refrigerant passes through the first reversing valve, the refrigerant inlet, the refrigerant outlet, the first one-way valve, the first refrigerant port, the second refrigerant port, the fourth refrigerant port and the third refrigerant port after coming out of the compressor to form a refrigeration 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.

[0020] The outlet of the compressor is connected to the refrigerant inlet via the first reversing valve, the refrigerant outlet is connected to the third refrigerant port via the first one-way valve, the first refrigerant port is connected to the inlet of the low-pressure gas-liquid separator, and when the outdoor side heat exchanger and the air-conditioning side heat exchanger are used for heat exchange, the refrigerant passes through the first reversing valve, the refrigerant inlet, the refrigerant outlet, the first one-way valve, the third refrigerant port, the fourth refrigerant port, the second refrigerant port and the first refrigerant 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;

[0021] The outlet of the compressor is connected to the refrigerant inlet via the first reversing valve, the refrigerant outlet is connected to the third refrigerant port via the first one-way valve, the first refrigerant port is connected to the inlet of the low-pressure gas-liquid separator, and the outdoor side heat exchanger is used for heat exchange. When the air-conditioning side heat exchanger is used as a pipeline, the refrigerant comes out of the compressor and passes through the first reversing valve, the refrigerant inlet, the refrigerant outlet, the first one-way valve, the third refrigerant port, the fourth refrigerant port, the second refrigerant port and the first refrigerant port to form a refrigerant circuit of pure hot water. At the same time, all the heat of the refrigerant is exchanged in the domestic hot water heat exchanger.

[0022] When the compressor has excess capacity, the refrigerant flows out of the compressor and enters the low-pressure gas-liquid separator through the bypass line.

[0023] In one embodiment, the first reversing valve includes a first valve port, a second valve port, and a third valve port;

[0024] The first valve port is connected to the outlet of the compressor, the second valve port is connected to the refrigerant inlet, and the third valve port is connected to the first refrigerant port and the third refrigerant port;

[0025] Wherein, when the first valve port is connected to the second valve port, the outlet of the compressor is connected to the refrigerant inlet;

[0026] When the first valve port is connected to the third valve port, the outlet of the compressor is connected to the first refrigerant port or the third refrigerant port.

[0027] In one embodiment, the air source heat pump system further comprises:

[0028] a second reversing valve, the second reversing valve comprising a fourth valve port, a fifth valve port, a sixth valve port, and a seventh valve port;

[0029] The fourth valve port is connected to the first reversing valve and the refrigerant outlet, the fifth valve port is connected to the first refrigerant port, the sixth valve port is connected to the third refrigerant port, and the seventh valve port is connected to the inlet of the low-pressure gas-liquid separator;

[0030] Wherein, when the fourth valve port is connected to the fifth valve port, the first refrigerant port is connected to the outlet of the compressor and / or the refrigerant outlet;

[0031] When the fourth valve port is connected to the sixth valve port, the third refrigerant port is connected to the outlet of the compressor and / or the refrigerant outlet;

[0032] When the fifth valve port is connected to the seventh valve port, the first refrigerant port is connected to the inlet of the low-pressure gas-liquid separator;

[0033] When the sixth valve port is connected to the seventh valve port, the third refrigerant port is connected to the inlet of the low-pressure gas-liquid separator.

[0034] In one embodiment, the air source heat pump system further comprises:

[0035] An economic module, wherein a first end of the economic module is connected to the second refrigerant port and the fourth refrigerant port, and a second end of the economic module is connected to the fourth refrigerant port and the second refrigerant port.

[0036] In one embodiment, the air source heat pump system further comprises:

[0037] A liquid storage container, wherein the liquid inlet of the liquid storage container is connected to the fourth refrigerant port, and the liquid outlet of the liquid storage container is connected to the second refrigerant port.

[0038] In one embodiment, the domestic hot water heat exchanger further comprises a first water inlet and a first water outlet communicating with the first water inlet;

[0039] The air source heat pump system further includes:

[0040] A domestic water tank is connected to the first water inlet and the first water outlet respectively.

[0041] By implementing the utility model, the following beneficial effects are achieved:

[0042] The utility model connects the bypass pipeline between the outlet of the compressor and the inlet of the low-pressure gas-liquid separator. The compressor can unload part of its capacity through the bypass pipeline, so that the compressor can avoid frequent shutdowns caused by excess capacity and improve the stability of the air source heat pump system under low-load conditions.

[0043] Furthermore, the first one-way valve at the refrigerant outlet end of the domestic hot water heat exchanger can prevent the refrigerant from entering the domestic hot water heat exchanger in the single cooling or heating mode, thereby improving the stability of the air source heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0045] Figure 1 It is a schematic diagram of the air source heat pump system of the utility model;

[0046] Figure 2This is a schematic diagram of the first refrigerant flow direction of the air source heat pump system of the utility model for preparing hot water through waste heat recovery mode while cooling;

[0047] Figure 3 This is a schematic diagram of the flow direction of the second refrigerant in the utility model air source heat pump system for preparing hot water through waste heat recovery mode while cooling;

[0048] Figure 4 This is a schematic diagram of the flow direction of the first refrigerant in the air source heat pump system of the utility model for preparing hot water while heating;

[0049] Figure 5 This is a schematic diagram of the flow direction of the second refrigerant in the air source heat pump system of the utility model when preparing hot water while heating;

[0050] Figure 6 This is a schematic diagram of the refrigerant flow direction of the air source heat pump system of the utility model when purely preparing hot water;

[0051] Figure 7 This is a schematic diagram of the refrigerant flow direction of the air source heat pump system of the utility model in the single cooling mode;

[0052] Figure 8 It is a schematic diagram of the refrigerant flow direction of the air source heat pump system of the present invention when in the single heating mode. DETAILED DESCRIPTION

[0053] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0054] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0055] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply 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 limiting 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 the indicated technical features. 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.

[0056] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "located at," and "located at" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, chemical connections, direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] It should be noted that the following connections between ports, between ports and components, or between components are merely physical connections, and do not uniquely define the connectivity and refrigerant flow relationships therein.

[0058] like Figure 1 As shown, some embodiments of the present invention disclose an air source heat pump system, including a compressor 11, a domestic hot water heat exchanger 12, a first reversing valve 13, an outdoor side heat exchanger 14, an air conditioning side heat exchanger 15, a first one-way valve 16 and a low-pressure gas-liquid separator 17, as follows:

[0059] The compressor 11 is used to compress the refrigerant. The domestic hot water heat exchanger 12 includes a refrigerant inlet 121 and a refrigerant outlet 122 connected to the refrigerant inlet 121. The first reversing valve 13 can be used to regulate the amount of refrigerant entering the domestic hot water heat exchanger 12. The outdoor heat exchanger 14 includes a first refrigerant port 141 and a second refrigerant port 142 connected to the first refrigerant port 141, and the outdoor heat exchanger 14 is used to achieve heat exchange between the refrigerant and the outside air. The air-conditioning side heat exchanger 15 includes a third refrigerant port 151 and a fourth refrigerant port 152 connected to the third refrigerant port 151, and the air-conditioning side heat exchanger 15 is used to achieve heat exchange between the refrigerant and the water in the terminal 31. The low-pressure gas-liquid separator 17 is used to perform gas-liquid separation, and the outlet of the low-pressure gas-liquid separator 17 is used to output gaseous refrigerant.

[0060] The outlet of the compressor 11 is connected to the inlet of the low-pressure gas-liquid separator 17 through the bypass line 10. The outlet of the compressor 11 is connected to the refrigerant inlet 121 through the first reversing valve 13. The outlet of the compressor 11 is also connected to the first refrigerant port 141 and the third refrigerant port 151 through the first reversing valve 13. The refrigerant outlet 122 is connected to the first refrigerant port 141 and the third refrigerant port 151 through the first one-way valve 16. The first one-way valve 16 is oriented toward the first refrigerant port 141 and the third refrigerant port 151. The second refrigerant port 142 is connected to the fourth refrigerant port 152. The third refrigerant port 151 and the first refrigerant port 141 are connected to the inlet of the low-pressure gas-liquid separator 17. The outlet of the low-pressure gas-liquid separator 17 is connected to the inlet of the compressor 11.

[0061] For example, the domestic hot water heat exchanger 12 is a shell and tube heat exchanger, the outdoor side heat exchanger 14 is a fin type heat exchanger, and the air conditioning side heat exchanger 15 is a plate type heat exchanger. The shell and tube heat exchanger, the fin type heat exchanger and the plate type heat exchanger here are only examples and are not intended to limit the present application. Other types are also possible.

[0062] In this embodiment, the bypass line 10 is connected between the outlet of the compressor 11 and the inlet of the low-pressure gas-liquid separator 17. The compressor 11 can unload part of its capacity through the bypass line 10, so that the compressor 11 can avoid frequent shutdowns due to excess capacity, thereby improving the stability of the air source heat pump system under low-load conditions.

[0063] Furthermore, the first one-way valve 16 at the refrigerant outlet 122 of the domestic hot water heat exchanger 12 can prevent the refrigerant from entering the domestic hot water heat exchanger 12 in the single cooling or heating mode, thereby improving the stability of the air source heat pump system.

[0064] Among them, Figure 2As shown, the outlet of the compressor 11 is connected to the refrigerant inlet 121 through the first reversing valve 13, the refrigerant outlet 122 is connected to the first refrigerant port 141 through the first one-way valve 16, the second refrigerant port 142 is connected to the fourth refrigerant port 152, and the third refrigerant port 151 is connected to the inlet of the low-pressure gas-liquid separator 17. When the outdoor side heat exchanger 14 and the air-conditioning side heat exchanger 15 are used for heat exchange, the refrigerant comes out of the compressor 11 and passes through the first reversing valve 13, the refrigerant inlet 121, the refrigerant outlet 122, the first one-way valve 16, the first refrigerant port 141, the second refrigerant port 142, the fourth refrigerant port 152 and the third refrigerant port 151 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, that is, the refrigeration and waste heat recovery (also called partial heat recovery) domestic hot water mode.

[0065] like Figure 3 As shown, the outlet of the compressor 11 is connected to the refrigerant inlet 121 and the first refrigerant port 141 through the first reversing valve 13, the refrigerant outlet 122 is connected to the first refrigerant port 141 through the first one-way valve 16, the second refrigerant port 142 is connected to the fourth refrigerant port 152, the third refrigerant port 151 is connected to the inlet of the low-pressure gas-liquid separator 17, and when the outdoor side heat exchanger 14 and the air conditioning side heat exchanger 15 are used for heat exchange, the refrigerant comes out of the compressor 11 and passes through the first refrigerant port 152. One path enters the fourth refrigerant port 152 through the reversing valve 13, the first refrigerant port 141, and the second refrigerant port 142, and the other path enters the fourth refrigerant port 152 through the first reversing valve 13, the refrigerant inlet 121, the refrigerant outlet 122, the first one-way valve 16, the first refrigerant port 141, and the second refrigerant port 142, forming 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, that is, a domestic hot water mode of refrigeration and waste heat recovery (also called partial heat recovery).

[0066] like Figure 4As shown, the outlet of the compressor 11 is connected to the refrigerant inlet 121 through the first reversing valve 13, the refrigerant outlet 122 is connected to the third refrigerant port 151 through the first one-way valve 16, the first refrigerant port 141 is connected to the inlet of the low-pressure gas-liquid separator 17, and when the outdoor side heat exchanger 14 and the air-conditioning side heat exchanger 15 are used for heat exchange, the refrigerant comes out of the compressor 11 and passes through the first reversing valve 13, the refrigerant inlet 121, the refrigerant outlet 122, the first one-way valve 16, the third refrigerant port 151, the fourth refrigerant port 152, the second refrigerant port 142 and the first refrigerant port 141 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, that is, the heating plus domestic hot water mode.

[0067] like Figure 5 As shown, the outlet of the compressor 11 is connected to the refrigerant inlet 121 and the third refrigerant port 151 through the first reversing valve 13, the refrigerant outlet 122 is connected to the third refrigerant port 151 through the first one-way valve 16, the first refrigerant port 141 is connected to the inlet of the low-pressure gas-liquid separator 17, and when the outdoor side heat exchanger 14 and the air conditioning side heat exchanger 15 are used for heat exchange, the refrigerant comes out of the compressor 11 and passes through the first reversing valve 13, The third refrigerant port 151 and the fourth refrigerant port 152 enter the second refrigerant port 142, and the other path passes through the first reversing valve 13, the refrigerant inlet 121, the refrigerant outlet 122, the first one-way valve 16, the third refrigerant port 151 and the fourth refrigerant port 152 to enter the second refrigerant port 142, forming 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, that is, the heating plus domestic hot water mode.

[0068] like Figure 6 As shown, the outlet of the compressor 11 is connected to the refrigerant inlet 121 through the first reversing valve 13, the refrigerant outlet 122 is connected to the third refrigerant port 151 through the first one-way valve 16, the first refrigerant port 141 is connected to the inlet of the low-pressure gas-liquid separator 17, and the outdoor side heat exchanger 14 is used for heat exchange. When the refrigerant pipeline of the air-conditioning side heat exchanger 15 is used as a passage, the refrigerant comes out of the compressor 11 and passes through the first reversing valve 13, the refrigerant inlet 121, the refrigerant outlet 122, the first one-way valve 16, the third refrigerant port 151, the fourth refrigerant port 152, the second refrigerant port 142 and the first refrigerant port 141 to form a pure hot water refrigerant circuit. At the same time, all the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12, that is, the pure hot water mode.

[0069] like Figure 7 As shown, the outlet of the compressor 11 is connected to the first refrigerant port 141 through the first reversing valve 13, the second refrigerant port 142 is connected to the fourth refrigerant port 152, and the third refrigerant port 151 is connected to the inlet of the low-pressure gas-liquid separator 17. When the outdoor side heat exchanger 14 and the air-conditioning side heat exchanger 15 are used for heat exchange, the refrigerant comes out of the compressor 11 and passes through the first reversing valve 13, the first refrigerant port 141, the second refrigerant port 142, the fourth refrigerant port 152 and the third refrigerant port 151 to form a separate cooling refrigerant circuit, that is, a separate cooling mode.

[0070] like Figure 8 As shown, the outlet of the compressor 11 is connected to the third refrigerant port 151 through the first reversing valve 13, the refrigerant outlet 122 is connected to the third refrigerant port 151 through the first one-way valve 16, the first refrigerant port 141 is connected to the inlet of the low-pressure gas-liquid separator 17, and when the outdoor side heat exchanger 14 and the air-conditioning side heat exchanger 15 are used for heat exchange, the refrigerant comes out of the compressor 11 and passes through the first reversing valve 13, the third refrigerant port 151, the fourth refrigerant port 152, the second refrigerant port 142 and the first refrigerant port 141 to form a separate heating refrigerant circuit, that is, a separate heating mode.

[0071] In the above mode, when the capacity of the compressor 11 is in excess, for example, when the temperature of the terminal 31 has reached the expected level, the refrigerant comes out of the compressor 11 and enters the low-pressure gas-liquid separator 17 through the bypass line 10 to unload part of the capacity of the compressor 11.

[0072] In some embodiments, such as Figure 1 As shown, the air source heat pump system further includes a first on-off valve 18, which is provided on the bypass line 10. For example, the first on-off valve 18 is a normally closed two-way valve. The normally closed two-way valve herein is merely an example and does not limit the present application. Other valves are also possible.

[0073] In some embodiments, such as Figure 1 As shown, at least a portion of the bypass line 10 is a capillary tube 19. It can be understood that at least a portion can be part or all.

[0074] In some embodiments, such as Figure 1As shown, the first reversing valve 13 includes a first valve port 131, a second valve port 132, and a third valve port 133. The first valve port 131 is connected to the outlet of the compressor 11, the second valve port 132 is connected to the refrigerant inlet 121, and the third valve port 133 is connected to the first refrigerant port 141 and the third refrigerant port 151. For example, the first reversing valve 1313 is a three-way valve. The three-way valve here is only an example and does not limit the present application. Other valves are also possible.

[0075] When the first valve port 131 is connected to the second valve port 132, the outlet of the compressor 11 is connected to the refrigerant inlet 121. When the first valve port 131 is connected to the third valve port 133, the outlet of the compressor 11 is connected to the first refrigerant port 141 or the third refrigerant port 151.

[0076] In some embodiments, such as Figure 1 As shown, the air source heat pump system also includes a second reversing valve 20, which is used to switch between the cooling mode and the heating mode. The second reversing valve 20 includes a fourth valve port 201, a fifth valve port 202, a sixth valve port 203, and a seventh valve port 204. The fourth valve port 201 is connected to the first reversing valve 13 (specifically, the third valve port 133) and the second refrigerant outlet 122122 (specifically, the outlet end of the first one-way valve 16), the fifth valve port 202 is connected to the first refrigerant port 141, the sixth valve port 203 is connected to the third refrigerant port 151, and the seventh valve port 204 is connected to the inlet of the low-pressure gas-liquid separator 17. For example, the second reversing valve 20 is a four-way valve. The four-way valve here is only an example and is not intended to limit the present application. Other valves are also possible.

[0077] When the fourth valve port 201 is connected to the fifth valve port 202 , the first refrigerant port 141 is connected to the outlet of the compressor 11 and / or the refrigerant outlet 122 .

[0078] When the fourth valve port 201 is connected to the sixth valve port 203 , the third refrigerant port 151 is connected to the outlet of the compressor 11 and / or the refrigerant outlet 122 .

[0079] When the fifth valve port 202 is connected to the seventh valve port 204 , the first refrigerant port 141 is connected to the inlet of the low-pressure gas-liquid separator 17 .

[0080] When the sixth valve port 203 is connected to the seventh valve port 204 , the third refrigerant port 151 is connected to the inlet of the low-pressure gas-liquid separator 17 .

[0081] In some embodiments, such as Figure 1 As shown, the air source heat pump system further includes a liquid storage container 21 , a liquid inlet 211 of the liquid storage container 21 is connected to the fourth refrigerant port 152 , and a liquid outlet 212 of the liquid storage container 21 is connected to the second refrigerant port 142 .

[0082] like Figure 4 As shown, when in heating plus domestic hot water mode, the refrigerant comes out of the compressor 11 through the first reversing valve 13, the refrigerant inlet 121, the refrigerant outlet 122, the first one-way valve 16, the third refrigerant port 151, the fourth refrigerant port 152, the liquid inlet 211 of the liquid storage container 21, the liquid outlet 212 of the liquid storage container 21, the second refrigerant port 142 and the first refrigerant port 141 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.

[0083] like Figure 6 As shown, when in pure hot water mode, the refrigerant comes out of the compressor 11 and passes through the first reversing valve 13, the refrigerant inlet 121, the refrigerant outlet 122, the first one-way valve 16, the third refrigerant port 151, the fourth refrigerant port 152, the liquid inlet 211 of the liquid storage container 21, the liquid outlet 212 of the liquid storage container 21, the second refrigerant port 142 and the first refrigerant port 141 to form a pure hot water refrigerant circuit, and all the heat of the refrigerant is exchanged in the domestic hot water heat exchanger 12.

[0084] In some embodiments, such as Figure 1 As shown, the air source heat pump system also includes an economic module, the first end of the economic module is connected to the second refrigerant port 142 and the fourth refrigerant port 152 (specifically, the liquid outlet 212 of the liquid storage container 21), and the second end of the economic module is connected to the fourth refrigerant port 152 (specifically, the liquid outlet 212 of the liquid storage container 21) and the second refrigerant port 142.

[0085] The economic module includes a refrigerant main path and an enthalpy-increasing auxiliary path, and the first end and the second end of the economic module are the first end and the second end of the refrigerant main path.

[0086] Specifically, the economizer module includes a heat exchanger 22, a first throttling device 23, and a second throttling device 24. The heat exchanger 22 includes a main refrigerant inlet 221, an auxiliary refrigerant inlet 222, a main refrigerant outlet 223, and an auxiliary refrigerant outlet 224. For example, the first throttling device 23 and the second throttling device 24 are electronic expansion valves or thermal expansion valves. The electronic expansion valve and the thermal expansion valve are merely examples and are not intended to limit the present application. Other types of expansion valves are also possible.

[0087] Among them, the first end of the economic module is divided into two paths, one path is connected to the second refrigerant port 142 and the fourth refrigerant port 152 after passing through the refrigerant main path (that is, after passing through the refrigerant main inlet 221, the refrigerant main outlet 223 and the second throttling device 24), and the other path is connected to the enthalpy increase port 111 of the compressor 11 after passing through the enthalpy increase auxiliary path (that is, after passing through the first throttling device 23, the refrigerant auxiliary inlet 222 and the refrigerant auxiliary outlet 224).

[0088] In this embodiment, the refrigerant coming out of the second refrigerant port 142 or the liquid storage container 21 passes through the refrigerant main path and the enthalpy increase auxiliary path respectively. After the refrigerant in the enthalpy increase auxiliary path is throttled and cooled by the first throttling device 23, it can more efficiently absorb the refrigerant heat from the refrigerant main path in the heat exchanger 22. After absorbing heat, the refrigerant vaporizes and enters the enthalpy increase port 111 of the compressor 11, thereby further reducing the temperature of the refrigerant in the refrigerant main path. In this way, the cooling effect of the terminal 31 can be improved in the cooling mode, and the heating ability of the refrigerant under low temperature conditions can be improved in the heating mode.

[0089] It can be understood that in some embodiments, if the length and complexity of the pipeline do not need to be considered, the compressor 11 may not be provided with the enthalpy increase port 111, but the refrigerant in the enthalpy increase auxiliary circuit can be directly introduced into the low-pressure gas-liquid separator 17 and enter the compressor 11.

[0090] Specifically, after the temperature of the refrigerant in the refrigerant main circuit is reduced through heat exchange, the temperature is further reduced through the second throttling device 24 before entering the second refrigerant port 142 or the fourth refrigerant port 152, thereby improving the heat absorption performance of the refrigerant, that is, improving the cooling effect of the system.

[0091] In some embodiments, such as Figure 1As shown, the air-source heat pump system further includes a second one-way valve 25, a third one-way valve 26, a fourth one-way valve 27, and a fifth one-way valve 28. The first end of the economizer module is connected to the liquid outlet 212 of the liquid storage container 21 via the second one-way valve 25 and to the second refrigerant port 142 via the third one-way valve 26. The second and third one-way valves 25 and 26 are connected toward the first end of the economizer module. The second end of the economizer module is connected to the second refrigerant port 142 via the fourth one-way valve 27 and to the fourth refrigerant port 152 via the fifth one-way valve 28. The fourth one-way valve 27 is connected toward the second refrigerant port 142, and the fifth one-way valve 28 is connected toward the fourth refrigerant port 152. The direction mentioned here refers to the flow direction of the refrigerant, not the spatial orientation.

[0092] In some embodiments, such as Figure 1 As shown, the domestic hot water heat exchanger 12 also includes a first water inlet 123 and a first water outlet 124 connected to the first water inlet 123. The air source heat pump system also includes a domestic water tank 29, which is used to store domestic water. The domestic water tank 29 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 29 in the domestic hot water heat exchanger 12 to prepare hot water. Specifically, the domestic water tank 29 includes a cold water inlet 291, a water outlet 292, a return water outlet 293, and a hot water outlet 294. The water outlet 292 is connected to the first water inlet 123, and the first water outlet 124 is connected to the return water outlet 293.

[0093] In some embodiments, such as Figure 1 As shown, the air source heat pump system also includes a first water pump 30, which is arranged in the water inlet pipe (the pipe connecting the water outlet 292 and the first water inlet 123) or the water outlet pipe (the pipe connecting the first water outlet 124 and the return water port 293) of the domestic hot water heat exchanger 12. The first water pump 30 is used to provide power for the water circulation between the domestic hot water heat exchanger 12 and the domestic water tank 29.

[0094] In some embodiments, the air source heat pump system also includes an end 31, and the air-conditioning side heat exchanger 15 is used to realize heat exchange between the refrigerant and the water in the end 31. Therefore, the air-conditioning side heat exchanger 15 also includes a second water inlet 153 and a second water outlet 154 connected to the second water inlet 153. The outlet of the end 31 is connected to the second water inlet 153 of the air-conditioning side heat exchanger 15, and the second water outlet 154 of the air-conditioning side heat exchanger 15 is connected to the inlet of the end 31.

[0095] The terminal 31 may include an air disk and / or floor heating installed indoors, and may further include a hydraulic module connected between the air-conditioning side heat exchanger 15 and the air disk and / or floor heating. The air disk, floor heating and hydraulic module here are only examples and are not intended to limit the present invention.

[0096] In some embodiments, the air source heat pump system also includes a second water pump 32, which is arranged in the water inlet pipe of the air-conditioning side heat exchanger 15 (the pipe connecting the outlet of the terminal 31 to the second water inlet 153 of the air-conditioning side heat exchanger 15) or the water outlet pipe (the pipe connecting the second water outlet 154 of the air-conditioning side heat exchanger 15 to the inlet of the terminal 31), and the second water pump 32 is used to provide power for the water circulation between the air-conditioning side heat exchanger 15 and the terminal 31. Figure 6 In the illustrated embodiment, when the air-conditioning-side heat exchanger 15 serves only as a passage for the refrigerant to flow without exchanging heat, the second water pump 32 is not started.

[0097] In some embodiments, to prevent excessive pipeline pressure, the air-source heat pump system further includes a pressure relief module, which includes a sixth one-way valve 33. The inlet end of the sixth one-way valve 33 is connected to the outlet end of the second throttling device 24, and the outlet end of the sixth one-way valve 33 is connected to the fourth valve port 201. In some embodiments, the inlet end of the sixth one-way valve 33 is also connected to the second refrigerant port 142.

[0098] Completely, as Figure 1 As shown, the connection relationship between the above components is:

[0099] The outlet of the compressor 11 is connected to the first valve port 131 of the first reversing valve 13. The outlet of the compressor 11 is connected to the inlet of the low-pressure gas-liquid separator 17 via the bypass line 10 (i.e., the bypass line 10 partially formed as a capillary tube) via the first on-off valve 18. The second valve port 132 of the first reversing valve 13 is connected to the refrigerant inlet 121 of the domestic hot water heat exchanger 12, and the third valve port 133 of the first reversing valve 13 is connected to the fourth valve port 201 of the second reversing valve 20. The water outlet 292 of the domestic water tank 29 is connected to the first water inlet 123 of the domestic hot water heat exchanger 12 via the first water pump 30. The first water outlet 124 of the domestic hot water heat exchanger 12 is connected to the return water port 293 of the domestic water tank 29. The refrigerant outlet 122 of the domestic hot water heat exchanger 12 is connected to the fourth valve port 201 of the second reversing valve 20 via the first one-way valve 16. The first one-way valve 16 is oriented toward the fourth valve port 201 of the second reversing valve 20. The fifth valve port 202 of the second reversing valve 20 is connected to the first refrigerant port 141 of the outdoor heat exchanger 14. The sixth valve port 203 of the second reversing valve 20 is connected to the third refrigerant port 151 of the air-conditioning heat exchanger 15. The seventh valve port 204 of the second reversing valve 20 is connected to the inlet of the low-pressure gas-liquid separator 17. The outlet of the low-pressure gas-liquid separator 17 is connected to the inlet of the compressor 11. The outlet of the terminal 31 is connected to the second water inlet 153 of the air-conditioning heat exchanger 15 via the second water pump 32. The second water outlet 154 of the air-conditioning heat exchanger 15 is connected to the inlet of the terminal 31. The first end of the refrigerant main circuit of the economizer module is connected to the liquid outlet 212 of the liquid storage container 21 via the second one-way valve 25, and is connected to the second refrigerant port 142 of the outdoor heat exchanger 14 via the third one-way valve 26. The second and third one-way valves 25 and 26 are connected toward the first end of the refrigerant main circuit of the economizer module. The second end of the refrigerant main circuit of the economizer module is connected to the second refrigerant port 142 of the outdoor heat exchanger 14 via the fourth one-way valve 27, and is connected to the fourth refrigerant port 152 of the air-conditioning heat exchanger 15 via the fifth one-way valve 28. The fourth one-way valve 27 is connected toward the second refrigerant port 142 of the outdoor heat exchanger 14, and the fifth one-way valve 28 is connected toward the fourth refrigerant port 152 of the air-conditioning heat exchanger 15. The enthalpy-increasing auxiliary path of the economic module is connected to the enthalpy-increasing port 111 of the compressor 11 .

[0100] In different situations, the air source heat pump system will correspond to different connections, as follows:

[0101] like Figure 2As shown, in the cooling and waste heat recovery domestic hot water mode, the first valve port 131 of the first reversing valve 13 is connected to the second valve port 132, the first throttling device 23 and the second throttling device 24 are opened, the fourth valve port 201 of the second reversing valve 20 is connected to the fifth valve port 202, and the sixth valve port 203 of the second reversing valve 20 is connected to the seventh valve port 204. That is, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12 after passing through the first valve port 131 and the second valve port 132 of the first reversing valve 13. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 29 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 enters the first refrigerant port 141 of the outdoor heat exchanger 14 through the first one-way valve 16 and the fourth valve port 201 and the fifth valve port 202 of the second reversing valve 20. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 14 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 142 of the outdoor heat exchanger 14 passes through the third one-way valve 26 and then passes through the main refrigerant path and the enthalpy-increasing auxiliary path. The medium-temperature liquid refrigerant in the enthalpy-increasing auxiliary path is throttled and cooled by the first throttling device 23 to become a low-temperature liquid refrigerant. The low-temperature liquid refrigerant absorbs the refrigerant heat from the main refrigerant path in the heat exchanger 22 and becomes a relatively low-temperature low-temperature gaseous refrigerant. Finally, it enters the enthalpy-increasing port 111 of the compressor 11. The medium-temperature liquid refrigerant in the main refrigerant path is cooled by heat exchange to become a low-temperature liquid refrigerant. It is further throttled and cooled by the second throttling device 24 to become a low-temperature liquid refrigerant with an even lower temperature. It then passes through the fifth one-way valve 28 and enters the fourth refrigerant port 152 of the air-conditioning-side heat exchanger 15. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal 31 in the air-conditioning side heat exchanger 15. The low-temperature liquid refrigerant absorbs heat from the circulating water and evaporates to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the third refrigerant port 151 of the air-conditioning side heat exchanger 15 passes through the sixth valve port 203 and the seventh valve port 204 of the second reversing valve 20, then passes through the low-pressure gas-liquid separator 17 and returns to the inlet of the compressor 11, thus circulating repeatedly. The domestic hot water heat exchanger 12 is connected to the domestic water tank 29, so that during summer cooling, at least part of the condensation heat originally used by the outdoor heat exchanger 14 for heat exchange with the air is recovered and reused, avoiding all heat being wasted in the outdoor heat exchanger 14 exchanging heat with the air. The recovered heat is then exchanged with the water in the domestic water tank 29 in the domestic hot water heat exchanger 12 to prepare hot water, thereby improving energy utilization.

[0102] When the capacity of the compressor 11 is excessive in the refrigeration and waste heat recovery domestic hot water mode, for example, when the temperature of the terminal 31 has reached the expected level, the first switch valve 18 can be opened, and the high-temperature gaseous refrigerant output from the outlet of the compressor 11 also passes through the bypass line 10 and the first switch valve 18 into the low-pressure gas-liquid separator 17 to unload part of the capacity of the compressor 11.

[0103] like Figure 3As shown, in the cooling and waste heat recovery domestic hot water production mode, the first valve port 131 of the first reversing valve 13 is connected to the second valve port 132 and the third valve port 133, the first throttling device 23 and the second throttling device 24 are open, the fourth valve port 201 of the second reversing valve 20 is connected to the fifth valve port 202, and the sixth valve port 203 of the second reversing valve 20 is connected to the seventh valve port 204. That is, when hot water needs to be produced in the cooling mode, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 passes through the first valve port 131 and the third valve port 133 of the first reversing valve 13 and the fourth valve port 201 and the fifth valve port 202 of the second reversing valve 20 before entering the first refrigerant port 141 of the outdoor heat exchanger 14. The high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12 after passing through the first valve port 131 and the second valve port 132 of the first reversing valve 13. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 29 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 enters the first refrigerant port 141 of the outdoor heat exchanger 14 through the first one-way valve 16 and the fourth valve port 201 and the fifth valve port 202 of the second reversing valve 20. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 14 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 142 of the outdoor heat exchanger 14 passes through the third one-way valve 26 and then passes through the main refrigerant path and the enthalpy-increasing auxiliary path. The medium-temperature liquid refrigerant in the enthalpy-increasing auxiliary path is throttled and cooled by the first throttling device 23 to become a low-temperature liquid refrigerant. The low-temperature liquid refrigerant absorbs the refrigerant heat from the main refrigerant path in the heat exchanger 22 and becomes a relatively low-temperature low-temperature gaseous refrigerant. Finally, it enters the enthalpy-increasing port 111 of the compressor 11. The medium-temperature liquid refrigerant in the main refrigerant path is cooled by heat exchange to become a low-temperature liquid refrigerant. It is further throttled and cooled by the second throttling device 24 to become a low-temperature liquid refrigerant with an even lower temperature. It then passes through the fifth one-way valve 28 and enters the fourth refrigerant port 152 of the air-conditioning-side heat exchanger 15. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal 31 in the air-conditioning side heat exchanger 15, and the low-temperature liquid refrigerant absorbs the heat of the circulating water and evaporates to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the third refrigerant port 151 of the air-conditioning side heat exchanger 15 passes through the sixth valve port 203 and the seventh valve port 204 of the second reversing valve 20 and then passes through the low-pressure gas-liquid separator 17 and returns to the inlet of the compressor 11, and circulates back and forth.The domestic hot water heat exchanger 12 is connected to the domestic water tank 29, so that at least part of the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 14 can be recovered and utilized during summer cooling, avoiding the waste of all heat in the heat exchange between the outdoor heat exchanger 14 and the air. The recovered heat is exchanged with the water in the domestic water tank 29 in the domestic hot water heat exchanger 12 to prepare hot water, thereby improving energy utilization.

[0104] When the capacity of the compressor 11 is excessive in the refrigeration and waste heat recovery domestic hot water mode, for example, when the temperature of the terminal 31 has reached the expected level, the first switch valve 18 can be opened, and the high-temperature gaseous refrigerant output from the outlet of the compressor 11 also passes through the bypass line 10 and the first switch valve 18 into the low-pressure gas-liquid separator 17 to unload part of the capacity of the compressor 11.

[0105] Specifically, Figure 3 and Figure 2 The difference between the shown embodiments is that Figure 3 In the embodiment shown, an additional refrigerant path passes through the first valve port 131 and the third valve port 133 of the first reversing valve 13 and the fourth valve port 201 and the fifth valve port 202 of the second reversing valve 20 and then enters the outdoor heat exchanger 14, which can better regulate the amount of refrigerant entering the domestic hot water heat exchanger 12, and the refrigerant coming out of the compressor 11 directly reaching the second reversing valve 20 can be guaranteed to be pure gaseous refrigerant. The pure gaseous refrigerant can further ensure that the second reversing valve 20 has sufficient pressure difference for reversing, so the pressure loss of the refrigerant pipeline is small, and the first reversing valve 13 is not easily affected by impurities, so that the system runs stably.

[0106] like Figure 4As shown, in the heating and domestic hot water mode, the first valve port 131 of the first reversing valve 13 is connected to the second valve port 132, the first throttling device 23 and the second throttling device 24 are opened, the fourth valve port 201 of the second reversing valve 20 is connected to the sixth valve port 203, and the fifth valve port 202 of the second reversing valve 20 is connected to the seventh valve port 204. That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12 after passing through the first valve port 131 and the second valve port 132 of the first reversing valve 13. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 29 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 fourth valve port 201 and the sixth valve port 203 of the second reversing valve 20 and enters the third refrigerant port 151 of the air-conditioning side heat exchanger 15. The medium-temperature gaseous refrigerant exchanges heat with the circulating water in the terminal 31 in the air-conditioning side heat exchanger 15 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the fourth refrigerant port 152 of the air-conditioning side heat exchanger 15 enters the liquid inlet 211 of the liquid storage container 21, and the medium-temperature liquid refrigerant output from the liquid outlet 212 of the liquid storage container 21 passes through the second one-way valve 25 and then passes through the refrigerant main path and the enthalpy increase auxiliary path respectively. The medium-temperature liquid refrigerant in the enthalpy increase auxiliary path is throttled and cooled by the first throttling device 23 to become a low-temperature liquid refrigerant. The low-temperature liquid refrigerant absorbs the refrigerant heat from the refrigerant main path in the heat exchanger 22 and becomes a relatively low-temperature low-temperature gaseous refrigerant, and finally enters the enthalpy increase port 111 of the compressor 11. The medium-temperature liquid refrigerant in the main refrigerant circuit is converted into a low-temperature liquid refrigerant after being cooled by heat exchange. It is then throttled and cooled by the second throttling device 24 to become a low-temperature liquid refrigerant with an even lower temperature. It then enters the second refrigerant port 142 of the outdoor heat exchanger 14 through the fourth one-way valve 27. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 14 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the fifth valve port 202 and the seventh valve port 204 of the second reversing valve 20, then passes through the low-pressure gas-liquid separator 17 and returns to the inlet of the compressor 11, thus repeating the cycle. The domestic hot water heat exchanger 12 is connected to the domestic water tank 29, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0107] When the capacity of the compressor 11 is excessive in the heating and domestic hot water mode, for example, when the temperature of the terminal 31 has reached the expected level, the first switch valve 18 can be opened, and the high-temperature gaseous refrigerant output from the outlet of the compressor 11 also passes through the bypass line 10 and the first switch valve 18 into the low-pressure gas-liquid separator 17 to unload part of the capacity of the compressor 11.

[0108] like Figure 5As shown, in the heating plus domestic hot water mode, the first valve port 131 of the first reversing valve 13 is connected to the second valve port 132 and the third valve port 133, the first throttling device 23 and the second throttling device 24 are open, the fourth valve port 201 of the second reversing valve 20 is connected to the sixth valve port 203, and the fifth valve port 202 of the second reversing valve 20 is connected to the seventh valve port 204. That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 passes through the first valve port 131 and the third valve port 133 of the first reversing valve 13, and the fourth valve port 201 and the sixth valve port 203 of the second reversing valve 20, before entering the third refrigerant port 151 of the air-conditioning-side heat exchanger 15. The high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12 after passing through the first valve port 131 and the second valve port 132 of the first reversing valve 13. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 29 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 fourth valve port 201 and the sixth valve port 203 of the second reversing valve 20 and enters the third refrigerant port 151 of the air-conditioning side heat exchanger 15. The medium-temperature gaseous refrigerant exchanges heat with the circulating water in the terminal 31 in the air-conditioning side heat exchanger 15 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the fourth refrigerant port 152 of the air-conditioning side heat exchanger 15 enters the liquid inlet 211 of the liquid storage container 21, and the medium-temperature liquid refrigerant output from the liquid outlet 212 of the liquid storage container 21 passes through the second one-way valve 25 and then passes through the refrigerant main path and the enthalpy increase auxiliary path respectively. The medium-temperature liquid refrigerant in the enthalpy increase auxiliary path is throttled and cooled by the first throttling device 23 to become a low-temperature liquid refrigerant. The low-temperature liquid refrigerant absorbs the refrigerant heat from the refrigerant main path in the heat exchanger 22 and becomes a relatively low-temperature low-temperature gaseous refrigerant, and finally enters the enthalpy increase port 111 of the compressor 11. The medium-temperature liquid refrigerant in the main refrigerant circuit is converted into a low-temperature liquid refrigerant after being cooled by heat exchange. It is then throttled and cooled by the second throttling device 24 to become a low-temperature liquid refrigerant with an even lower temperature. It then enters the second refrigerant port 142 of the outdoor heat exchanger 14 through the fourth one-way valve 27. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 14 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the fifth valve port 202 and the seventh valve port 204 of the second reversing valve 20, then passes through the low-pressure gas-liquid separator 17 and returns to the inlet of the compressor 11, thus repeating the cycle. The domestic hot water heat exchanger 12 is connected to the domestic water tank 29, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0109] When the capacity of the compressor 11 is excessive in the heating and domestic hot water mode, for example, when the temperature of the terminal 31 has reached the expected level, the first switch valve 18 can be opened, and the high-temperature gaseous refrigerant output from the outlet of the compressor 11 also passes through the bypass line 10 and the first switch valve 18 into the low-pressure gas-liquid separator 17 to unload part of the capacity of the compressor 11.

[0110] Specifically, Figure 5 and Figure 4 The difference between the shown embodiments is that Figure 5 In the embodiment shown, an additional path passes through the first valve port 131 and the third valve port 133 of the first reversing valve 13 and the fourth valve port 201 and the sixth valve port 203 of the second reversing valve 20 and then enters the air-conditioning side heat exchanger 15, which can better regulate the amount of refrigerant entering the domestic hot water heat exchanger 12, and the refrigerant coming out of the compressor 11 directly reaching the second reversing valve 20 can be guaranteed to be the gaseous refrigerant. The pure gaseous refrigerant can better ensure that the second reversing valve 20 has sufficient pressure difference for reversing, so the pressure loss of the refrigerant pipeline is small, and the first reversing valve 13 is not easily affected by impurities, so that the system runs stably.

[0111] like Figure 6As shown, in the pure hot water mode, the first valve port 131 of the first reversing valve 13 is connected to the second valve port 132, the first throttling device 23 and the second throttling device 24 are opened, the fourth valve port 201 of the second reversing valve 20 is connected to the sixth valve port 203, the fifth valve port 202 of the second reversing valve 20 is connected to the seventh valve port 204, and the outdoor side heat exchanger 14 is used for heat exchange, and the refrigerant pipeline of the air-conditioning side heat exchanger 15 is used as a passage. That is, when only hot water needs to be prepared, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12 after passing through the first valve port 131 and the second valve port 132 of the first reversing valve 13. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 29 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 fourth valve port 201 and the sixth valve port 203 of the second reversing valve 20 and the air-conditioning side heat exchanger 1 5 enters the liquid inlet 211 of the liquid storage container 21, and the medium-temperature liquid refrigerant output from the liquid outlet 212 of the liquid storage container 21 passes through the second one-way valve 25 and then passes through the refrigerant main path and the enthalpy increase auxiliary path respectively. The medium-temperature liquid refrigerant in the enthalpy increase auxiliary path is throttled and cooled by the first throttling device 23 to become a low-temperature liquid refrigerant. The low-temperature liquid refrigerant absorbs the refrigerant heat from the refrigerant main path in the heat exchanger 22 and becomes a relatively low-temperature low-temperature gaseous refrigerant, and finally enters the enthalpy increase port 111 of the compressor 11. The medium-temperature liquid refrigerant in the main refrigerant circuit is cooled by heat exchange and converted into a low-temperature liquid refrigerant. This is then throttled and cooled further by the second throttling device 24, becoming an even lower-temperature liquid refrigerant. The refrigerant then enters the second refrigerant port 142 of the outdoor heat exchanger 14 through the fourth one-way valve 27. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 14, transforming into a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the fifth and seventh valve ports 202 and 204 of the second reversing valve 20, then through the low-pressure gas-liquid separator 17 and returns to the inlet of the compressor 11, thus repeating the cycle. The domestic hot water heat exchanger 12 is connected to the domestic water tank 29, allowing all heat from the compressor 11 to be used solely in the domestic hot water heat exchanger 12 for heat exchange with the water in the domestic water tank 29, thus effectively utilizing energy.

[0112] like Figure 7As shown, in cooling-only mode, the first valve port 131 of the first reversing valve 13 is connected to the third valve port 133, the fourth valve port 201 of the second reversing valve 20 is connected to the fifth valve port 202, the sixth valve port 203 of the second reversing valve 20 is connected to the seventh valve port 204, and the first throttling device 23 and the second throttling device 24 are open. That is, in cooling-only mode in summer, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 passes through the first valve port 131 and the third valve port 133 of the first reversing valve 13 and the fourth valve port 201 and the fifth valve port 202 of the second reversing valve 20, and then enters the first refrigerant port 141 of the outdoor heat exchanger 14. The high-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 14, becoming a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 142 of the outdoor heat exchanger 14 passes through the third one-way valve 26 and then passes through the main refrigerant path and the enthalpy-increasing auxiliary path. The medium-temperature liquid refrigerant in the enthalpy-increasing auxiliary path is throttled and cooled by the first throttling device 23 to become a low-temperature liquid refrigerant. The low-temperature liquid refrigerant absorbs the refrigerant heat from the main refrigerant path in the heat exchanger 22 and becomes a relatively low-temperature low-temperature gaseous refrigerant. Finally, it enters the enthalpy-increasing port 111 of the compressor 11. The medium-temperature liquid refrigerant in the main refrigerant path is cooled by heat exchange to become a low-temperature liquid refrigerant. It is further throttled and cooled by the second throttling device 24 to become a low-temperature liquid refrigerant with an even lower temperature. It then passes through the fifth one-way valve 28 and enters the fourth refrigerant port 152 of the air-conditioning-side heat exchanger 15. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal 31 in the air-conditioning side heat exchanger 15, and the low-temperature liquid refrigerant absorbs the heat of the circulating water and evaporates to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the third refrigerant port 151 of the air-conditioning side heat exchanger 15 passes through the sixth valve port 203 and the seventh valve port 204 of the second reversing valve 20 and then passes through the low-pressure gas-liquid separator 17 and returns to the inlet of the compressor 11, and circulates back and forth.

[0113] When the capacity of the compressor 11 is excessive in the single refrigeration mode, for example, when the temperature of the terminal 31 has reached the expected level, the first switch valve 18 can be opened, and the high-temperature gaseous refrigerant output from the outlet of the compressor 11 also passes through the bypass line 10 and the first switch valve 18 into the low-pressure gas-liquid separator 17 to unload part of the capacity of the compressor 11.

[0114] like Figure 8As shown, in the heating-only mode, the first valve port 131 of the first reversing valve 13 is connected to the third valve port 133, the fourth valve port 201 of the second reversing valve 20 is connected to the sixth valve port 203, the fifth valve port 202 of the second reversing valve 20 is connected to the seventh valve port 204, and the first throttling device 23 and the second throttling device 24 are open. That is, when heating-only mode is used in winter, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 passes through the first valve port 131 and the third valve port 133 of the first reversing valve 13 and the fourth valve port 201 and the sixth valve port 203 of the second reversing valve 20 and enters the third refrigerant port 151 of the air-conditioning-side heat exchanger 15. The high-temperature gaseous refrigerant undergoes heat exchange with the circulating water in the terminal 31 in the air-conditioning-side heat exchanger 15 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the fourth refrigerant port 152 of the air-conditioning-side heat exchanger 15 is Liquid refrigerant enters the liquid inlet 211 of the liquid storage container 21. The medium-temperature liquid refrigerant output from the liquid outlet 212 of the liquid storage container 21 passes through the second one-way valve 25 and then passes through the main refrigerant path and the enthalpy-increasing auxiliary path. The medium-temperature liquid refrigerant in the enthalpy-increasing auxiliary path is throttled and cooled by the first throttling device 23 to become low-temperature liquid refrigerant. The low-temperature liquid refrigerant absorbs heat from the refrigerant in the main refrigerant path in the heat exchanger 22 and becomes a relatively low-temperature low-temperature gaseous refrigerant. Finally, it enters the enthalpy-increasing port 111 of the compressor 11. The medium-temperature liquid refrigerant in the main refrigerant path is cooled by heat exchange to become low-temperature liquid refrigerant. It is further throttled and cooled by the second throttling device 24 to become a still lower-temperature low-temperature liquid refrigerant. It then passes through the fourth one-way valve 27 and enters the second refrigerant port 142 of the outdoor heat exchanger 14. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 14 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the fifth valve port 202 and the seventh valve port 204 of the second reversing valve 20 and then through the low-pressure gas-liquid separator 17 and returns to the inlet of the compressor 11, repeating the cycle.

[0115] When the capacity of the compressor 11 is excessive in the single heating mode, for example, when the temperature of the terminal 31 has reached the expected level, the first switch valve 18 can be opened, and the high-temperature gaseous refrigerant output from the outlet of the compressor 11 also passes through the bypass line 10 and the first switch valve 18 into the low-pressure gas-liquid separator 17 to unload part of the capacity of the compressor 11.

[0116] 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.

[0117] In some other embodiments, the second one-way valve 25, the third one-way valve 26, the fourth one-way valve 27, the fifth one-way valve 28, and the sixth one-way valve 33 may be replaced by a second on-off valve, a third on-off valve, a fourth on-off valve, a fifth on-off valve, and a sixth on-off valve. For example, the second on-off valve, the third on-off valve, the fourth on-off valve, the fifth on-off valve, and the sixth on-off valve may be solenoid valves. The solenoid valves herein are merely examples and are not intended to limit the present application. Other valves may also be used.

[0118] Wherein, in different modes, the switching states of the second switch valve, the third switch valve, the fourth switch valve and the fifth switch valve are:

[0119] In the above-mentioned cooling and waste heat recovery domestic hot water mode and the single cooling mode, the second switch valve and the fourth switch valve are closed, and the third switch valve and the fifth switch valve are opened.

[0120] In the above-mentioned heating plus domestic hot water mode, heating mode alone and hot water mode alone, the second switch valve and the fourth switch valve are opened, and the third switch valve and the fifth switch valve are closed.

[0121] By implementing the utility model, the following beneficial effects are achieved:

[0122] The utility model connects the bypass line 10 between the outlet of the compressor 11 and the inlet of the low-pressure gas-liquid separator 17. The compressor 11 can unload part of its capacity through the bypass line 10, so that the compressor 11 can avoid frequent shutdowns caused by excess capacity, thereby improving the stability of the air source heat pump system under low-load conditions.

[0123] Furthermore, the first one-way valve 16 at the refrigerant outlet 122 of the domestic hot water heat exchanger 12 can prevent the refrigerant from entering the domestic hot water heat exchanger 12 in the single cooling or heating mode, thereby improving the stability of the air source heat pump system.

[0124] It is understandable that the above embodiments only express some of the implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention, 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 present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. An air source 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; a first reversing valve; an outdoor heat exchanger, the outdoor heat exchanger comprising a first refrigerant port and a second refrigerant port communicating with the first refrigerant port; an air-conditioning side heat exchanger, the air-conditioning side heat exchanger comprising a third refrigerant port and a fourth refrigerant port connected to the third refrigerant port; a first one-way valve and a low-pressure gas-liquid separator; The outlet of the compressor is connected to the inlet of the low-pressure gas-liquid separator through a bypass line; The outlet of the compressor is connected to the refrigerant inlet through the first reversing valve, and the outlet of the compressor is connected to the first refrigerant port and the third refrigerant port through the first reversing valve; The refrigerant outlet is connected to the first refrigerant port and the third refrigerant port via the first one-way valve, and the conducting direction of the first one-way valve is toward the first refrigerant port and the third refrigerant port; The second refrigerant port is connected to the fourth refrigerant port, the third refrigerant port and the first refrigerant port are connected to the inlet of the low-pressure gas-liquid separator, and the outlet of the low-pressure gas-liquid separator is connected to the inlet of the compressor.

2. The air source heat pump system according to claim 1, characterized in that: The air source heat pump system further includes: A first switch valve is provided on the bypass pipeline.

3. The air source heat pump system according to claim 2, characterized in that: The first switch valve is a normally closed two-way valve.

4. The air source heat pump system according to claim 1, characterized in that: At least a portion of the bypass pipeline is a capillary tube.

5. The air source heat pump system according to claim 1, characterized in that: The outlet of the compressor is connected to the refrigerant inlet via the first reversing valve, the refrigerant outlet is connected to the first refrigerant port via the first one-way valve, the third refrigerant port is connected to the inlet of the low-pressure gas-liquid separator, and when the outdoor side heat exchanger and the air-conditioning side heat exchanger are used for heat exchange, the refrigerant passes through the first reversing valve, the refrigerant inlet, the refrigerant outlet, the first one-way valve, the first refrigerant port, the second refrigerant port, the fourth refrigerant port and the third refrigerant port after coming out of the compressor to form a refrigeration 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; The outlet of the compressor is connected to the refrigerant inlet via the first reversing valve, the refrigerant outlet is connected to the third refrigerant port via the first one-way valve, the first refrigerant port is connected to the inlet of the low-pressure gas-liquid separator, and when the outdoor side heat exchanger and the air-conditioning side heat exchanger are used for heat exchange, the refrigerant passes through the first reversing valve, the refrigerant inlet, the refrigerant outlet, the first one-way valve, the third refrigerant port, the fourth refrigerant port, the second refrigerant port and the first refrigerant 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; The outlet of the compressor is connected to the refrigerant inlet via the first reversing valve, the refrigerant outlet is connected to the third refrigerant port via the first one-way valve, the first refrigerant port is connected to the inlet of the low-pressure gas-liquid separator, and the outdoor side heat exchanger is used for heat exchange. When the air-conditioning side heat exchanger is used as a pipeline, the refrigerant comes out of the compressor and passes through the first reversing valve, the refrigerant inlet, the refrigerant outlet, the first one-way valve, the third refrigerant port, the fourth refrigerant port, the second refrigerant port and the first refrigerant port to form a refrigerant circuit of pure hot water. At the same time, all the heat of the refrigerant is exchanged in the domestic hot water heat exchanger. When the compressor has excess capacity, the refrigerant flows out of the compressor and enters the low-pressure gas-liquid separator through the bypass line.

6. The air source heat pump system according to claim 1, characterized in that: The first reversing valve includes a first valve port, a second valve port and a third valve port; The first valve port is connected to the outlet of the compressor, the second valve port is connected to the refrigerant inlet, and the third valve port is connected to the first refrigerant port and the third refrigerant port; Wherein, when the first valve port is connected to the second valve port, the outlet of the compressor is connected to the refrigerant inlet; When the first valve port is connected to the third valve port, the outlet of the compressor is connected to the first refrigerant port or the third refrigerant port.

7. The air source heat pump system according to claim 1, characterized in that: The air source heat pump system further includes: a second reversing valve, the second reversing valve comprising a fourth valve port, a fifth valve port, a sixth valve port, and a seventh valve port; The fourth valve port is connected to the first reversing valve and the refrigerant outlet, the fifth valve port is connected to the first refrigerant port, the sixth valve port is connected to the third refrigerant port, and the seventh valve port is connected to the inlet of the low-pressure gas-liquid separator; Wherein, when the fourth valve port is connected to the fifth valve port, the first refrigerant port is connected to the outlet of the compressor and / or the refrigerant outlet; When the fourth valve port is connected to the sixth valve port, the third refrigerant port is connected to the outlet of the compressor and / or the refrigerant outlet; When the fifth valve port is connected to the seventh valve port, the first refrigerant port is connected to the inlet of the low-pressure gas-liquid separator; When the sixth valve port is connected to the seventh valve port, the third refrigerant port is connected to the inlet of the low-pressure gas-liquid separator.

8. The air source heat pump system according to claim 1, characterized in that: The air source heat pump system further includes: An economic module, wherein a first end of the economic module is connected to the second refrigerant port and the fourth refrigerant port, and a second end of the economic module is connected to the fourth refrigerant port and the second refrigerant port.

9. The air source heat pump system according to claim 1, characterized in that: The air source heat pump system further includes: A liquid storage container, wherein the liquid inlet of the liquid storage container is connected to the fourth refrigerant port, and the liquid outlet of the liquid storage container is connected to the second refrigerant port.

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

Images