Heat recovery heat pump system

Abstract

The utility model discloses a heat recovery heat pump system which comprises a compressor, a heat recovery heat exchanger, a liquid storage container, an outdoor side heat exchanger, an air conditioner side heat exchanger, a first throttling device and a second throttling device. The heat recovery heat exchanger comprises a refrigerant inlet and a refrigerant outlet. The liquid storage container comprises a liquid inlet pipe, a first bidirectional pipe and a second bidirectional pipe. 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. The refrigerant inlet is connected with an outlet of the compressor through a pipeline, the refrigerant outlet is connected with the liquid inlet pipe through a pipeline, and the refrigerant outlet is connected with the first refrigerant port and / or the third refrigerant port through a pipeline. The second refrigerant port is connected with the first two-way pipe through a first throttling device, and the fourth refrigerant port is connected with the second two-way pipe through a second throttling device. The first refrigerant port and / or the third refrigerant port are / is connected with an inlet of the compressor through a pipeline. According to the utility model, the complexity of a system loop is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat recovery 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. The traditional trigeneration air source heat pump system is partial heat recovery or full heat recovery. There are certain limitations in the application process, and the system circuit is complex, requiring the setting of multiple one-way valves, stop valves and other valve switches. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a heat recovery 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 recovery heat pump system, including:

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

[0006] A heat recovery heat exchanger, the heat recovery heat exchanger comprising a refrigerant inlet and a refrigerant outlet connected to the refrigerant inlet;

[0007] A liquid storage container, the liquid storage container comprising a liquid inlet pipe, a first two-way pipe and a second two-way pipe;

[0008] An outdoor heat exchanger, the outdoor heat exchanger comprising a first refrigerant port and a second refrigerant port connected to 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 throttling device and a second throttling device;

[0011] Wherein, the refrigerant inlet is connected to the outlet of the compressor through a pipeline, the refrigerant outlet is connected to the liquid inlet pipe through a pipeline, and the refrigerant outlet is connected to the first refrigerant port and / or the third refrigerant port through a pipeline;

[0012] The second refrigerant port is connected to the first two-way tube through the first throttling device, and the fourth refrigerant port is connected to the second two-way tube through the second throttling device;

[0013] The first refrigerant port and / or the third refrigerant port are connected to the inlet of the compressor through a pipeline.

[0014] In one embodiment, the liquid inlet pipe leads to the upper part of the liquid storage container, and the first two-way pipe and the second two-way pipe lead to the bottom of the liquid storage container.

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

[0016] a first reversing valve, the first reversing valve comprising a first valve port, a second valve port and a third valve port;

[0017] The first valve port is connected to the refrigerant outlet; the second valve port is connected to the liquid inlet pipe; and the third valve port is connected to the first refrigerant port and / or the third refrigerant port through a pipeline.

[0018] In one embodiment, the second refrigerant port is further connected to the first two-way tube via a pipeline, and the fourth refrigerant port is further connected to the second two-way tube via a pipeline;

[0019] Wherein, when the first valve port is connected with the second valve port, and the second valve port is connected with the second throttling device through the liquid inlet pipe and the second two-way pipe, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the second valve port, the liquid inlet pipe, the second two-way pipe, the second throttling device, the fourth refrigerant port and the third refrigerant port after coming out of the compressor to form a refrigeration refrigerant circuit, and all the heat of the refrigerant is exchanged in the heat recovery heat exchanger;

[0020] The first valve port is connected with the third valve port, and when the third valve port is connected with the first refrigerant port 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 port, the second refrigerant port, the first two-way pipe, the second two-way pipe, the second throttling device, the fourth refrigerant port and the third refrigerant port to form a refrigeration refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger.

[0021] In one embodiment, when the first valve port is connected to the third valve port, and the third valve port is connected to the third refrigerant port 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 third refrigerant port, the fourth refrigerant port, the second two-way pipe, the first two-way pipe, the first throttling device, the second refrigerant port and the first refrigerant port to form a heating refrigerant circuit, and at least part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger;

[0022] When the first valve port is connected with the second valve port, and the second valve port is connected with the first throttling device through the liquid inlet pipe and the first two-way pipe, 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 liquid inlet pipe, the first two-way pipe, the first throttling device, the second refrigerant port and the first refrigerant port 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 heat recovery heat exchanger.

[0023] In one embodiment, the heat recovery heat pump system further comprises:

[0024] a first one-way valve, wherein the second refrigerant port is further connected to the first two-way pipe through the first one-way valve, and the conducting direction of the first one-way valve is toward the first two-way pipe; and

[0025] The fourth refrigerant port is also connected to the second two-way pipe through the second one-way valve, and the conducting direction of the second one-way valve is toward the second two-way pipe.

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

[0027] a second reversing valve, the second reversing valve comprising a fourth valve port, a fifth valve port and a sixth valve port;

[0028] 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 port and / or the third refrigerant port through a pipeline;

[0029] Wherein, when the fourth valve port is connected to the fifth valve port, the outlet of the compressor is connected to the refrigerant inlet;

[0030] When the fourth valve port is connected to the sixth valve port, the outlet of the compressor is connected to the first refrigerant port or the third refrigerant port through a pipeline.

[0031] In one embodiment, the heat recovery heat pump system further comprises:

[0032] 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;

[0033] The seventh valve port is connected to the third valve port of the first reversing valve; the eighth valve port is connected to the first refrigerant port; the ninth valve port is connected to the inlet of the compressor; the tenth valve port is connected to the third refrigerant port;

[0034] Wherein, when the seventh valve port is connected to the eighth valve port, the first refrigerant port is connected to the third valve port of the first reversing valve;

[0035] When the seventh valve port is connected to the tenth valve port, the third refrigerant port is connected to the third valve port of the first reversing valve;

[0036] When the eighth valve port is connected to the ninth valve port, the first refrigerant port is connected to the inlet of the compressor;

[0037] When the tenth valve port is communicated with the ninth valve port, the third refrigerant port is communicated with the inlet of the compressor.

[0038] In one embodiment, the first reversing valve and the second reversing valve are three-way valves, and the third reversing valve is a four-way valve.

[0039] In one of the embodiments, the heat recovery heat exchanger further comprises a first water inlet and a first water outlet communicating with the first water inlet;

[0040] The heat recovery heat pump system also includes:

[0041] A domestic water tank is connected to the first water inlet and the first water outlet respectively.

[0042] By implementing the utility model, the following beneficial effects are achieved:

[0043] The utility model arranges three tubes (the liquid inlet tube, the first two-way tube and the second two-way tube) in the liquid storage container, and the refrigerant outlet of the heat recovery heat exchanger can be directly connected to the liquid inlet tube through a pipeline, thereby reducing the complexity of the system circuit and eliminating the need to additionally arrange valve switches such as one-way valves and stop valves.

[0044] Furthermore, the first two-way pipe and the second two-way pipe of the liquid storage container are respectively connected to the outdoor side heat exchanger and the air conditioning side heat exchanger, so that two-way flow can be realized, thereby realizing multiple modes of operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0046] Figure 1 It is a schematic diagram of the heat recovery heat pump system of the utility model;

[0047] Figure 2 It is a schematic diagram of the refrigerant flow direction of the heat recovery heat pump system of the utility model for preparing hot water through the full heat recovery mode while refrigerating;

[0048] Figure 3It is a schematic diagram of the flow direction of the first refrigerant in the utility model heat recovery heat pump system for preparing hot water through the waste heat recovery mode while refrigerating;

[0049] Figure 4 It is a schematic diagram of the flow direction of the second refrigerant in the utility model heat recovery heat pump system for preparing hot water through the waste heat recovery mode while refrigerating;

[0050] Figure 5 This is a schematic diagram of the flow direction of the first refrigerant in the heat recovery heat pump system of the utility model for preparing hot water while heating;

[0051] Figure 6 It is a schematic diagram of the flow direction of the second refrigerant in the heat recovery heat pump system of the utility model for preparing hot water while heating;

[0052] Figure 7 This is a schematic diagram of the refrigerant flow direction of the heat recovery heat pump system of the utility model when purely preparing hot water;

[0053] Figure 8 It is a schematic diagram of the refrigerant flow direction of the heat recovery heat pump system of the utility model in the cooling mode;

[0054] Fig. 9 It is a schematic diagram of the refrigerant flow direction of the heat recovery heat pump system of the utility model in the heating mode. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] like Figure 1 As shown, one embodiment of the utility model discloses a heat recovery heat pump system, including a compressor 11, a heat recovery heat exchanger 12, a liquid storage container 13, an outdoor side heat exchanger 14, an air conditioning side heat exchanger 15, a first throttling device 16 and a second throttling device 17, as follows:

[0060] The compressor 11 is used to compress the refrigerant, and the compressor 11 includes an inlet 111 and an outlet 112. The heat recovery heat exchanger 12 is used to achieve heat exchange between the refrigerant and the water in the domestic water tank 19, and the heat recovery heat exchanger 12 includes a refrigerant inlet 121 and a refrigerant outlet 122 connected to the refrigerant inlet 121. The liquid storage container 13 is used to store liquid refrigerant, and the liquid storage container 13 includes a liquid inlet pipe 131, a first two-way pipe 132 and a second two-way pipe 133. The two-way pipes can take in and out liquid. For example, during cooling, the first two-way pipe 132 can take in liquid, and the second two-way pipe 133 can take out liquid. During heating, the second two-way pipe 133 can take in liquid, and the first two-way pipe 132 can take out liquid. The outdoor heat exchanger 14 is used to achieve heat exchange between the refrigerant and the outside air, and the outdoor heat exchanger 14 includes a first refrigerant port 141 and a second refrigerant port 142 connected to the first refrigerant port 141. The air-conditioning side heat exchanger 15 is used to realize heat exchange between the refrigerant and the water in the terminal device 25 . 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 .

[0061] The refrigerant inlet 121 is connected to the outlet 112 of the compressor 11 through a pipeline, the refrigerant outlet 122 is connected to the liquid inlet pipe 131 through a pipeline, and the refrigerant outlet 122 is connected to the first refrigerant port 141 and / or the third refrigerant port 151 through a pipeline.

[0062] The second refrigerant port 142 is connected to the first two-way tube 132 through the first throttling device 16 , and the fourth refrigerant port 152 is connected to the second two-way tube 133 through the second throttling device 17 .

[0063] The first refrigerant port 141 and / or the third refrigerant port 151 are connected to the inlet of the compressor 11 through a pipeline.

[0064] For example, the heat recovery heat exchanger 12 is a shell and tube heat exchanger, the outdoor side heat exchanger 14 is a fin heat exchanger, the air-conditioning side heat exchanger 15 is a plate heat exchanger, the first throttling device 16 and the second throttling device 17 are electronic expansion valves or thermal expansion valves. The shell and tube heat exchanger, the fin heat exchanger, the plate heat exchanger, the electronic expansion valve and the thermal expansion valve here are only examples and are not intended to limit the present application.

[0065] In this embodiment, three tubes (the liquid inlet tube 131, the first two-way tube 132 and the second two-way tube 133) are arranged in the liquid storage container 13, and the refrigerant outlet 122 of the heat recovery heat exchanger 12 can be directly connected to the liquid inlet tube 131 through a pipeline, thereby reducing the complexity of the system loop and eliminating the need to additionally arrange valve switches such as one-way valves and stop valves.

[0066] Furthermore, the first two-way pipe 132 and the second two-way pipe 133 of the liquid storage container 13 are respectively connected to the outdoor side heat exchanger 14 and the air conditioning side heat exchanger 15, so as to realize two-way flow, thereby realizing multiple modes of operation of the system.

[0067] In some embodiments, the liquid inlet pipe 131 leads to the upper portion of the liquid storage container 13 , and the first two-way pipe 132 and the second two-way pipe 133 lead to the bottom portion of the liquid storage container 13 .

[0068] In some embodiments, the heat recovery heat pump system further includes a first reversing valve 18, which is used to switch all or at least part of the heat of the refrigerant for heat exchange in the heat recovery heat exchanger 12, and the first reversing valve 18 includes a first valve port 181, a second valve port 182 and a third valve port 183. The first valve port 181 is connected to the refrigerant outlet 122. The second valve port 182 is connected to the liquid inlet pipe 131. The third valve port 183 is connected to the first refrigerant port 141 and / or the third refrigerant port 151 through a pipeline. For example, the first reversing valve 18 is a three-way valve, and the three-way valve here is only an example and is not intended to be a limitation of the present application.

[0069] In this embodiment, the first reversing valve 18 is provided at the refrigerant outlet 122 end of the heat recovery heat exchanger 12, thereby realizing 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 for heat recovery.

[0070] Furthermore, the second refrigerant port 142 is also connected to the first two-way tube 132 through a pipeline, and the fourth refrigerant port 152 is also connected to the second two-way tube 133 through a pipeline. That is, the second refrigerant port 142 is connected to the first two-way tube 132 through the first throttling device 16 in one way, and is connected to the first two-way tube 132 through a pipeline in the other way; the fourth refrigerant port 152 is connected to the second two-way tube 133 through the second throttling device 17 in one way, and is connected to the second two-way tube 133 through a pipeline in the other way.

[0071] Among them, when the first valve port 181 is connected with the second valve port 182, and the second valve port 182 is connected with the second throttling device 17 through the liquid inlet pipe 131 and the second two-way pipe 133, that is, in the refrigeration and full heat recovery domestic hot water mode, the first throttling device 16 is closed, the second throttling device 17 is opened, the other pipeline from the first two-way pipe 132 to the second refrigerant port 142 and the other pipeline from the second two-way pipe 133 to the fourth refrigerant port 152 are disconnected, and the refrigerant comes out of the compressor 11 through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 181, the second valve port 182, the liquid inlet pipe 131, the second two-way pipe 133, the second throttling device 17, the fourth refrigerant port 152 and the third refrigerant port 151 to form a refrigeration refrigerant circuit, and all the heat of the refrigerant is exchanged in the heat recovery heat exchanger 12.

[0072] When the first valve port 181 is connected with the third valve port 183, and the third valve port 183 is connected with the first refrigerant port 141 through a pipeline, that is, in the refrigeration and waste heat recovery (also called partial heat recovery) domestic hot water production mode, the first throttling device 16 is closed, the second refrigerant port 142 is connected to another pipeline of the first two-way pipe 132, the second two-way pipe 133 is disconnected from another pipeline of the fourth refrigerant port 152, and the second throttling device 17 is opened. After the refrigerant comes out of the compressor 11, it passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 181, the third valve port 183, the first refrigerant port 141, the second refrigerant port 142, the first two-way pipe 132, the second two-way pipe 133, the second throttling device 17, the fourth refrigerant port 152 and the third refrigerant port 151 to form a refrigeration refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger 12.

[0073] When the first valve port 181 is connected with the third valve port 183, and the third valve port 183 is connected with the third refrigerant port 151 through a pipeline, that is, in the heating and domestic hot water mode, the second throttling device 17 is closed, the other pipeline from the fourth refrigerant port 152 to the second two-way pipe 133 is connected, the other pipeline from the first two-way pipe 132 to the second refrigerant port 142 is disconnected, and the first throttling device 16 is opened. After the refrigerant comes out of the compressor 11, it passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 181, the third valve port 183, the third refrigerant port 151, the fourth refrigerant port 152, the second two-way pipe 133, the first two-way pipe 132, the first throttling device 16, 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 heat recovery heat exchanger 12.

[0074] When the first valve port 181 is connected with the second valve port 182, and the second valve port 182 is connected with the first throttling device 16 through the liquid inlet pipe 131 and the first two-way pipe 132, that is, in the pure hot water mode, the first throttling device 16 is opened, and the second throttling device 17 is closed, and the other pipeline from the first two-way pipe 132 to the second refrigerant port 142 and the other pipeline from the second two-way pipe 133 to the fourth refrigerant port 152 are disconnected, the refrigerant comes out of the compressor 11 and passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 181, the second valve port 182, the liquid inlet pipe 131, the first two-way pipe 132, the first throttling device 16, the second refrigerant port 142 and the first refrigerant port 141 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 heat recovery heat exchanger 12.

[0075] In some embodiments, the heat recovery 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 recovery heat pump system further includes a domestic water tank 19, which is used to store domestic water. The domestic water tank 19 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 19 in the heat recovery heat exchanger 12 to prepare hot water. Specifically, the domestic water tank 19 includes a cold water inlet 191, a water outlet 192, a return water outlet 193 and a hot water outlet 194. The water outlet 192 is connected to the first water inlet 123, and the first water outlet 124 is connected to the return water outlet 193.

[0076] In some embodiments, the heat recovery heat pump system also includes a first water pump 20, which is arranged in the water inlet pipe (the pipe connecting the water outlet 192 and the first water inlet 123) or the water outlet pipe (the pipe connecting the first water outlet 124 and the return water port 193) of the heat recovery heat exchanger 12, and the first water pump 20 is used to provide power for the water circulation between the heat recovery heat exchanger 12 and the domestic water tank 19.

[0077] 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 reversal of the third reversing valve 24 in the cooling and waste heat recovery modes, a full heat recovery mode is provided. The whole heat of the refrigerant output by the compressor 11 is heat-exchanged with the water in the domestic water tank 19 in the heat recovery 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 directly enters the liquid inlet pipe 131 of the liquid storage container 13 through the second valve port 182. The liquid refrigerant output by the second two-way pipe 133 enters the air conditioner side heat exchanger 15 after throttling and cooling by the second throttling device 17. 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 at 50°C and the target is to be heated to 60°C, the waste heat recovery mode can be directly adopted. It should be noted that the temperature data listed above are only for illustration and are not intended to limit the present application.

[0078] In some embodiments, the heat recovery heat pump system further includes a first one-way valve 21 and a second one-way valve 22, the second refrigerant port 142 is also connected to the first two-way pipe 132 through the first one-way valve 21, and the conduction direction of the first one-way valve 21 is toward the first two-way pipe 132. The fourth refrigerant port 152 is also connected to the second two-way pipe 133 through the second one-way valve 22, and the conduction direction of the second one-way valve 22 is toward the second two-way pipe 133. That is, the second refrigerant port 142 is connected to the first two-way pipe 132 through the first throttling device 16 in one way, and is connected to the first two-way pipe 132 in the other way through the first one-way valve 21; the fourth refrigerant port 152 is connected to the second two-way pipe 133 through the second throttling device 17 in one way, and is connected to the second two-way pipe 133 in the other way through the second one-way valve 22. It should be noted here that the direction mentioned here refers to the flow direction of the refrigerant, not the direction of the spatial position.

[0079] In this embodiment, two sets of parallel throttling devices and one-way valves can make the circuit in any mode pass through the throttling device only once, thereby reducing resistance.

[0080] Among them, 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 181, the third valve port 183, the first refrigerant port 141, the second refrigerant port 142, the first one-way valve 21, the first two-way pipe 132, the second two-way pipe 133, the second throttling device 17, the fourth refrigerant port 152 and the third refrigerant port 151 to form a refrigeration refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger 12.

[0081] In the above-mentioned 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 181, the third valve port 183, the third refrigerant port 151, the fourth refrigerant port 152, the second one-way valve 22, the second two-way pipe 133, the first two-way pipe 132, the first throttling device 16, 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 heat recovery heat exchanger 12.

[0082] In some embodiments, the heat recovery heat pump system further includes a second reversing valve 23, the second reversing valve 23 is used to regulate the amount of refrigerant entering the heat recovery heat exchanger 12, and the second reversing valve 23 includes a fourth valve port 231, a fifth valve port 232, and a sixth valve port 233. The fourth valve port 231 is connected to the outlet 112 of the compressor 11. The fifth valve port 232 is connected to the refrigerant inlet 121. The sixth valve port 233 is connected to the first refrigerant port 141 and / or the third refrigerant port 151 through a pipeline. For example, the second reversing valve 23 is a three-way valve, and the three-way valve here is only an example and is not intended to limit the present application.

[0083] When the fourth valve port 231 is connected to the fifth valve port 232, the outlet 112 of the compressor 11 is connected to the refrigerant inlet 121. When the fourth valve port 231 is connected to the sixth valve port 233, the outlet 112 of the compressor 11 is connected to the first refrigerant port 141 or the third refrigerant port 151 through a pipeline.

[0084] In some embodiments, the heat recovery heat pump system further includes a third reversing valve 24, which is used to switch between the cooling mode and the heating mode, and includes a seventh valve port 241, an eighth valve port 242, a ninth valve port 243 and a tenth valve port 244. The seventh valve port 241 is connected to the third valve port 183 of the first reversing valve 18, and / or the seventh valve port 241 is connected to the outlet 112 of the compressor 11 (specifically, the sixth valve port 233 of the second reversing valve 23) through a pipeline. The eighth valve port 242 is connected to the first refrigerant port 141. The ninth valve port 243 is connected to the inlet 111 of the compressor 11. The tenth valve port 244 is connected to the third refrigerant port 151. For example, the third reversing valve 24 is a three-way valve, and the three-way valve here is only an example and is not intended to limit the present application.

[0085] Among them, when the seventh valve port 241 is connected with the eighth valve port 242, the first refrigerant port 141 is connected with the third valve port 183 of the first reversing valve 18, and / or the first refrigerant port 141 is connected with the outlet 112 of the compressor 11 (specifically, the sixth valve port 233 of the second reversing valve 23) through a pipeline.

[0086] When the seventh valve port 241 is connected to the tenth valve port 244, the third refrigerant port 151 is connected to the third valve port 183 of the first reversing valve 18, and / or is connected to the outlet 112 of the compressor 11 (specifically the sixth valve port 233 of the second reversing valve 23) through a pipeline.

[0087] When the eighth valve port 242 is connected to the ninth valve port 243 , the first refrigerant port 141 is connected to the inlet 111 of the compressor 11 .

[0088] When the tenth valve port 244 is connected to the ninth valve port 243 , the third refrigerant port 151 is connected to the inlet 111 of the compressor 11 .

[0089] In some embodiments, the heat recovery heat pump system also includes the terminal device 25, and the air-conditioning side heat exchanger 15 is used to realize heat exchange between the refrigerant and the water in the terminal device 25, so 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 terminal device 25 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 terminal device 25.

[0090] The terminal device 25 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 mentioned here are only examples and are not intended to limit the present invention.

[0091] In some embodiments, the heat recovery heat pump system also includes a second water pump 26, which is arranged in the water inlet pipe of the air-conditioning side heat exchanger 15 (the pipe connecting the outlet of the terminal device 25 and 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 and the inlet of the terminal device 25), and the second water pump 26 is used to provide power for the water circulation between the air-conditioning side heat exchanger 15 and the terminal device 25.

[0092] In some embodiments, the heat recovery heat pump system further includes a gas-liquid separator 27 , and the gas-liquid separator 27 is used to separate the gaseous refrigerant and the liquid refrigerant. The gas-liquid separator 27 is disposed at the inlet end of the compressor 11 .

[0093] In some embodiments, in order to facilitate the release of pressure in the refrigerant pipeline during system maintenance, the heat recovery heat pump system also includes a pressure relief module, and the pressure relief module includes a third one-way valve 28, the inlet end of the third one-way valve 28 is connected to the pipeline between the first throttling device 16 and the second throttling device 17 (specifically, the first two-way pipe 132 or the second two-way pipe 133 of the liquid storage container 13), and the outlet end of the third one-way valve 28 is connected to the pipeline between the compressor 11 and the third reversing valve 24 (specifically, the seventh valve port 241 of the third reversing valve 24), and the conduction direction of the third one-way valve 28 is toward the pipeline between the compressor 11 and the third reversing valve 24, wherein the direction refers to the flow direction of the refrigerant, not the direction of the spatial position.

[0094] 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 231 of the second reversing valve 23, the fifth valve port 232 of the second reversing valve 23 is connected to the refrigerant inlet 121 of the heat recovery heat exchanger 12, and the sixth valve port 233 of the second reversing valve 23 is connected to the seventh valve port 241 of the third reversing valve 24; the refrigerant outlet 122 of the heat recovery heat exchanger 12 is connected to the first valve port 181 of the first reversing valve 18, and the second valve port 182 of the first reversing valve 18 is connected to the liquid inlet pipe 131 of the liquid storage container 13. The third valve port 183 of the first reversing valve 18 is connected to the seventh valve port 241 of the third reversing valve 24; the water outlet 192 of the domestic water tank 19 is connected to the first water inlet 123 of the heat recovery heat exchanger 12 via the first water pump 20, and the first water outlet 124 of the heat recovery heat exchanger 12 is connected to the return water port 193 of the domestic water tank 19; the eighth valve port 242 of the third reversing valve 24 is connected to the first refrigerant port 141 of the outdoor heat exchanger 14; the second refrigerant port 142 of the outdoor heat exchanger 14 passes through the first throttling device 1 6 is connected to the first two-way pipe 132 of the liquid storage container 13, and the second refrigerant port 142 of the outdoor heat exchanger 14 is connected to the first two-way pipe 132 of the liquid storage container 13 through the first one-way valve 21, and the conduction direction of the first one-way valve 21 is toward the first two-way pipe 132; the fourth refrigerant port 152 of the air-conditioning side heat exchanger 15 is connected to the second two-way pipe 133 of the liquid storage container 13 through the second throttling device 17, and the fourth refrigerant port 152 of the air-conditioning side heat exchanger 15 is connected to the second two-way pipe 133 of the liquid storage container 13 through the second one-way valve 22. The second two-way pipe 133 of the air conditioner is connected, and the conduction direction of the second one-way valve 22 is toward the second two-way pipe 133; the third refrigerant port 151 of the air conditioner side heat exchanger 15 is connected to the tenth valve port 244 of the third reversing valve 24, and the ninth valve port 243 of the third reversing valve 24 is connected to the inlet 111 of the compressor 11 through the gas-liquid separator 27; the outlet of the terminal device 25 is connected to the second water inlet 153 of the air conditioner side heat exchanger 15 through the second water pump 26, and the second water outlet 154 of the air conditioner side heat exchanger 15 is connected to the inlet of the terminal device 25. It should be noted here that the connection between the above ports, between the ports and components, or between components is only a physical structural connection, and does not uniquely define the connectivity relationship and refrigerant flow relationship therein.

[0095] In different situations, the heat recovery heat pump system will correspond to different valve ports, as follows:

[0096] like Figure 2As shown, in the cooling and full heat recovery domestic hot water mode, the fourth valve port 231 of the second reversing valve 23 is connected with the fifth valve port 232, the first valve port 181 of the first reversing valve 18 is connected with the second valve port 182, the tenth valve port 244 of the third reversing valve 24 is connected with the ninth valve port 243, the first throttling device 16 is closed, and the second throttling device 17 is opened. 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 231 and the fifth valve port 232 of the second reversing valve 23 and then enters the refrigerant inlet 121 of the heat recovery heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 19 in the heat recovery 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 heat recovery heat exchanger 12 passes through the first valve port 181 and the second valve port 182 of the first reversing valve 18 and then enters the liquid inlet pipe 131 of the liquid storage container 13. The medium-temperature liquid refrigerant output by the two-way pipe 133 is throttled and cooled by the second throttling device 17 to become a low-temperature liquid refrigerant with a lower temperature, and then 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 device 25 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 by the third refrigerant port 151 of the air-conditioning side heat exchanger 15 passes through the tenth valve port 244 and the ninth valve port 243 of the third reversing valve 24, and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 27, and circulates back and forth. The heat recovery heat exchanger 12 is connected to the domestic water tank 19, so that all 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 19 in the heat recovery heat exchanger 12 to quickly prepare hot water, improve energy utilization, and increase the speed of hot water production.

[0097] like Figure 3As shown, in the refrigeration and waste heat recovery domestic hot water mode, the fourth valve port 231 of the second reversing valve 23 is connected with the fifth valve port 232, the first valve port 181 of the first reversing valve 18 is connected with the third valve port 183, the seventh valve port 241 of the third reversing valve 24 is connected with the eighth valve port 242, the tenth valve port 244 of the third reversing valve 24 is connected with the ninth valve port 243, the first throttling device 16 is closed, and the second throttling device 17 is opened. 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 231 and the fifth valve port 232 of the second reversing valve 23 and then enters the refrigerant inlet 121 of the heat recovery heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 19 in the heat recovery 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 heat recovery heat exchanger 12 passes through the first valve port 181 and the third valve port 183 of the first reversing valve 18 and the seventh valve port 241 and the eighth valve port 242 of the third reversing valve 24 and then enters the first refrigerant port 141 of the outdoor heat exchanger 14. 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 air conditioner 10 passes through the first one-way valve 21 and enters the first two-way pipe 132 of the liquid storage container 13. The medium-temperature liquid refrigerant output from the second two-way pipe 133 of the liquid storage container 13 passes through the second throttling device 17 to become a low-temperature liquid refrigerant with a lower temperature, and then 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 device 25 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 tenth valve port 244 and the ninth valve port 243 of the third reversing valve 24 and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 27, and circulates back and forth. The heat recovery heat exchanger 12 is connected to the domestic water tank 19, 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, thereby avoiding wasting all the 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 19 in the heat recovery heat exchanger 12 to prepare hot water, thereby improving energy utilization.

[0098] Specifically, Figure 3 and Figure 2 The difference between the shown embodiments is that Figure 3In order to recycle at least part of the condensation heat originally used for heat exchange with air by the outdoor heat exchanger 14, Figure 2 The purpose is to recover and utilize all the condensation heat originally used by the outdoor heat exchanger 14 for heat exchange with the air.

[0099] like Figure 4As shown, in the cooling mode and the waste heat recovery domestic hot water mode, the fourth valve port 231 of the second reversing valve 23 is respectively connected with the fifth valve port 232 and the sixth valve port 233, the first valve port 181 of the first reversing valve 18 is connected with the third valve port 183, the seventh valve port 241 of the third reversing valve 24 is connected with the eighth valve port 242, the tenth valve port 244 of the third reversing valve 24 is connected with the ninth valve port 243, the first throttling device 16 is closed, and the second throttling device 17 is opened. 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 heat recovery heat exchanger 12 after passing through the fourth valve port 231 and the fifth valve port 232 of the second reversing valve 23, and enters the refrigerant inlet 121 of the outdoor heat exchanger 14 after passing through the fourth valve port 231 and the sixth valve port 233 of the second reversing valve 23 and the seventh valve port 241 and the eighth valve port 242 of the third reversing valve 24. The first refrigerant port 141, the high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 19 in the heat recovery 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 heat recovery heat exchanger 12 passes through the first valve port 181 and the third valve port 183 of the first reversing valve 18 and the seventh valve port 241 and the eighth valve port 242 of the third reversing valve 24 and then enters the first refrigerant port 141 of the outdoor heat exchanger 14. 1, the medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 14 to become 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 first one-way valve 21 and enters the first two-way pipe 132 of the liquid storage container 13, the medium-temperature liquid refrigerant output from the second two-way pipe 133 of the liquid storage container 13 passes through the second throttling device 17 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the air conditioning side heat exchanger 15 At the fourth refrigerant port 152, the low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 25 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 by the third refrigerant port 151 of the air-conditioning side heat exchanger 15 passes through the tenth valve port 244 and the ninth valve port 243 of the third reversing valve 24 and then passes through the gas-liquid separator 27 and returns to the inlet 111 of the compressor 11, and circulates back and forth. The heat recovery heat exchanger 12 is connected to the domestic water tank 19, so that at least part of the condensation heat originally used for heat exchange with air by the outdoor heat exchanger 14 is 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 19 in the heat recovery heat exchanger 12 to prepare hot water, thereby improving energy utilization.

[0100] 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 14 after passing through the fourth valve port 231 and the sixth valve port 233 of the second reversing valve 23 and the seventh valve port 241 and the eighth valve port 242 of the third reversing valve 24, so that the amount of refrigerant entering the heat recovery heat exchanger 12 can be better regulated, and the refrigerant coming out of the compressor 11 directly reaching the third reversing valve 24 can be guaranteed to be the gaseous refrigerant, while the refrigerant passing through the heat recovery heat exchanger 12 may contain liquid refrigerant after heat exchange. The pure gaseous refrigerant can better ensure that the third reversing valve 24 has sufficient pressure difference for reversing, so the pressure loss of the refrigerant pipeline is small, and the second reversing valve 23 is not easily affected by impurities, so that the system runs stably.

[0101] like Figure 5As shown, in the heating and domestic hot water mode, the fourth valve port 231 of the second reversing valve 23 is connected to the fifth valve port 232, the first valve port 181 of the first reversing valve 18 is connected to the third valve port 183, the seventh valve port 241 of the third reversing valve 24 is connected to the tenth valve port 244, the eighth valve port 242 of the third reversing valve 24 is connected to the ninth valve port 243, the first throttling device 16 is opened, and the second throttling device 17 is closed. 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 first passes through the fourth valve port 231 and the fifth valve port 232 of the second reversing valve 23 and then enters the refrigerant inlet 121 of the heat recovery heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 19 in the heat recovery 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 heat recovery heat exchanger 12 passes through the first valve port 181 and the third valve port 183 of the first reversing valve 18 and the seventh valve port 241 and the tenth valve port 244 of the third reversing valve 24 and then 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 device 25 in the air-conditioning side heat exchanger 15. After the water undergoes heat exchange, it becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant outputted from the fourth refrigerant port 152 of the air-conditioning side heat exchanger 15 passes through the second one-way valve 22 and enters the second two-way pipe 133 of the liquid storage container 13. The medium-temperature liquid refrigerant outputted from the first two-way pipe 132 of the liquid storage container 13 passes through the first throttling device 16 to be throttled and cooled to become a low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant port 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant outputted from the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the eighth valve port 242 and the ninth valve port 243 of the third reversing valve 24 and then passes through the gas-liquid separator 27 and returns to the inlet 111 of the compressor 11, repeating the cycle. The heat recovery heat exchanger 12 is connected to the domestic water tank 19, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0102] like Figure 6As shown, in the heating and domestic hot water mode, the fourth valve port 231 of the second reversing valve 23 is respectively connected with the fifth valve port 232 and the sixth valve port 233, the first valve port 181 of the first reversing valve 18 is connected with the third valve port 183, the seventh valve port 241 of the third reversing valve 24 is connected with the tenth valve port 244, the eighth valve port 242 of the third reversing valve 24 is connected with the ninth valve port 243, the first throttling device 16 is opened, and the second throttling device 17 is closed. That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 enters the refrigerant inlet 121 of the heat recovery heat exchanger 12 after passing through the fourth valve port 231 and the fifth valve port 232 of the second reversing valve 23, and the other way passes through the fourth valve port 231 and the sixth valve port 233 of the second reversing valve 23 and the seventh valve port 241 and the tenth valve port 244 of the third reversing valve 24 and enters the air conditioning side exchanger 12. The high-temperature gaseous refrigerant is heat-exchanged with the water in the domestic water tank 19 in the heat recovery heat exchanger 12 to prepare hot water and then becomes a medium-temperature gaseous refrigerant. The medium-temperature gaseous refrigerant outputted from the refrigerant outlet 122 of the heat recovery heat exchanger 12 passes through the first valve port 181 and the third valve port 183 of the first reversing valve 18 and the seventh valve port 241 and the tenth valve port 244 of the third reversing valve 24 and then enters the air-conditioning side heat exchanger 1 The medium-temperature gaseous refrigerant is heat-exchanged with the circulating water in the terminal device 25 in the air-conditioning side heat exchanger 15 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant outputted from the fourth refrigerant port 152 of the air-conditioning side heat exchanger 15 passes through the second one-way valve 22 and enters the second two-way pipe 133 of the liquid storage container 13. The medium-temperature liquid refrigerant outputted from the first two-way pipe 132 of the liquid storage container 13 passes through the first throttling device 16 and becomes a medium-temperature liquid refrigerant. The low-temperature liquid refrigerant is converted into a low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant port 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 and becomes a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output by the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the eighth valve port 242 and the ninth valve port 243 of the third reversing valve 24 and then passes through the gas-liquid separator 27 and returns to the inlet 111 of the compressor 11, and the cycle is repeated. The heat recovery heat exchanger 12 is connected to the domestic water tank 19, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0103] Specifically, Figure 6 and Figure 5 The difference between the shown embodiments is that Figure 6In the embodiment shown, an additional path is provided to enter the air-conditioning side heat exchanger 15 after passing through the fourth valve port 231 and the sixth valve port 233 of the second reversing valve 23 and the seventh valve port 241 and the tenth valve port 244 of the third reversing valve 24, so that the amount of refrigerant entering the heat recovery heat exchanger 12 can be better regulated, and the path of refrigerant coming out of the compressor 11 directly reaching the third reversing valve 24 can be guaranteed to be the gaseous refrigerant, while the refrigerant passing through the heat recovery heat exchanger 12 may contain liquid refrigerant after heat exchange. The pure gaseous refrigerant can better ensure that the third reversing valve 24 has sufficient pressure difference for reversing, so the pressure loss of the refrigerant pipeline is small, and the second reversing valve 23 is not easily affected by impurities, so that the system runs stably.

[0104] like Figure 7 As shown, in the pure hot water mode, the fourth valve port 231 of the second reversing valve 23 is connected with the fifth valve port 232, the first valve port 181 of the first reversing valve 18 is connected with the second valve port 182, the eighth valve port 242 of the third reversing valve 24 is connected with the ninth valve port 243, the first throttling device 16 is opened, and the second throttling device 17 is closed. 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 231 and the fifth valve port 232 of the second reversing valve 23 and then enters the refrigerant inlet 121 of the heat recovery heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 19 in the heat recovery heat exchanger 12 to prepare hot water. After preparing the hot water, it becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the refrigerant outlet 122 of the heat recovery heat exchanger 12 passes through the first valve port 181 and the second valve port 182 of the first reversing valve 18 and then enters the liquid inlet of the liquid storage container 13. The medium-temperature liquid refrigerant outputted from the first bidirectional pipe 132 of the liquid storage container 13 passes through the first throttling device 16 to be throttled and cooled to become a low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant port 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant outputted from the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the eighth valve port 242 and the ninth valve port 243 of the third reversing valve 24 and then passes through the gas-liquid separator 27 and returns to the inlet 111 of the compressor 11, and the cycle is repeated. The heat recovery heat exchanger 12 is connected to the domestic water tank 19, so that all the heat from the compressor 11 can be used alone in the heat recovery heat exchanger 12 for heat exchange with the water in the domestic water tank 19, and the 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 air-conditioning side heat exchanger 15, and the heat exchange efficiency is higher.

[0105] like Figure 8 As shown, in the cooling mode, the fourth valve port 231 of the second reversing valve 23 is connected to the sixth valve port 233, the seventh valve port 241 of the third reversing valve 24 is connected to the eighth valve port 242, the tenth valve port 244 of the third reversing valve 24 is connected to the ninth valve port 243, the first throttling device 16 is closed, and the second throttling device 17 is opened. That is, when cooling is performed alone in summer, the high-temperature gaseous refrigerant output from the outlet 112 of the compressor 11 passes through the fourth valve port 231 and the sixth valve port 233 of the second reversing valve 23 and the seventh valve port 241 and the eighth valve port 242 of the third reversing valve 24 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 to become 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 first one-way valve 21 and then enters the first two-way pipe 132 of the liquid storage container 13. The second two-way pipe 142 of the liquid storage container 13 The medium-temperature liquid refrigerant output from 33 is throttled and cooled by the second throttling device 17 to become a low-temperature liquid refrigerant with a lower temperature, and then 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 device 25 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 tenth valve port 244 and the ninth valve port 243 of the third reversing valve 24, and then passes through the gas-liquid separator 27 and returns to the inlet 111 of the compressor 11, and circulates back and forth.

[0106] like Fig. 9As shown, in the heating mode, the fourth valve port 231 of the second reversing valve 23 is connected to the sixth valve port 233, the seventh valve port 241 of the third reversing valve 24 is connected to the tenth valve port 244, the eighth valve port 242 of the third reversing valve 24 is connected to the ninth valve port 243, the first throttling device 16 is opened, and the second throttling device 17 is closed. 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 231 and the sixth valve port 233 of the second reversing valve 23 and the seventh valve port 241 and the tenth valve port 244 of the third reversing valve 24 and then enters the third refrigerant port 151 of the air-conditioning side heat exchanger 15. The high-temperature gaseous refrigerant is converted into medium-temperature liquid refrigerant after heat exchange with the circulating water in the terminal device 25 in the air-conditioning side heat exchanger 15. The medium-temperature liquid refrigerant output from the fourth refrigerant port 152 of the air-conditioning side heat exchanger 15 passes through the second one-way valve 22 and then enters the first refrigerant port 151 of the liquid storage container 13. Two two-way pipes 133, the medium-temperature liquid refrigerant output by the first two-way pipe 132 of the liquid storage container 13 is throttled and cooled by the first throttling device 16 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant port 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output by the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the eighth valve port 242 and the ninth valve port 243 of the third reversing valve 24, and then returns to the inlet 111 of the compressor 11 through the gas-liquid separator 27, and repeats the cycle.

[0107] 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.

[0108] In some other embodiments, the first one-way valve 21 and the second one-way valve 22 may be replaced by a first switch valve and a second switch valve. The second refrigerant port 142 is connected to the first two-way pipe 132 through the first throttling device 16 in one way, and is connected to the first two-way pipe 132 through the first switch valve in another way; the fourth refrigerant port 152 is connected to the second two-way pipe 133 through the second throttling device 17 in one way, and is connected to the second two-way pipe 133 through the second switch valve in another way. For example, the first switch valve and the second switch valve are solenoid valves, and the solenoid valves here are only examples and are not intended to limit the present application.

[0109] Wherein, the switching states of the first switch valve and the second switch valve in different modes are:

[0110] In the above-mentioned refrigeration and full heat recovery domestic hot water mode, the first switch valve and the second switch valve are closed, and the refrigerant comes out of the compressor 11 and passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 181, the second valve port 182, the liquid inlet pipe 131, the second two-way pipe 133, the second throttling device 17, the fourth refrigerant port 152 and the third refrigerant port 151 to form a refrigeration refrigerant circuit, and all the heat of the refrigerant is exchanged in the heat recovery heat exchanger 12.

[0111] 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. After the refrigerant comes out of the compressor 11, it passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 181, the third valve port 183, the first refrigerant port 141, the second refrigerant port 142, the first switch valve, the first two-way pipe 132, the second two-way pipe 133, the second throttling device 17, 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 heat recovery heat exchanger 12.

[0112] In the above-mentioned heating plus domestic hot water mode, the first switch valve is closed and the second switch valve is opened. After the refrigerant comes out of the compressor 11, it passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 181, the third valve port 183, the third refrigerant port 151, the fourth refrigerant port 152, the second switch valve, the second two-way pipe 133, the first two-way pipe 132, the first throttling device 16, the second refrigerant port 142 and the first refrigerant port 141 to form a heating refrigerant circuit. At the same time, at least part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger 12.

[0113] In the above-mentioned pure hot water mode, the first switch valve and the second switch valve are closed, and the refrigerant comes out of the compressor 11 and passes through the refrigerant inlet 121, the refrigerant outlet 122, the first valve port 181, the second valve port 182, the liquid inlet pipe 131, the first two-way pipe 132, the first throttling device 16, the second refrigerant port 142 and the first refrigerant port 141 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 heat recovery heat exchanger 12.

[0114] By implementing the utility model, the following beneficial effects are achieved:

[0115] The utility model sets three tubes (the liquid inlet tube 131, the first two-way tube 132 and the second two-way tube 133) in the liquid storage container 13, and the refrigerant outlet 122 of the heat recovery heat exchanger 12 can be directly connected to the liquid inlet tube 131 through a pipeline, thereby reducing the complexity of the system loop and eliminating the need to set additional valve switches such as one-way valves and stop valves.

[0116] Furthermore, the first two-way pipe 132 and the second two-way pipe 133 of the liquid storage container 13 are respectively connected to the outdoor side heat exchanger 14 and the air conditioning side heat exchanger 15, so as to realize two-way flow, thereby realizing multiple modes of operation of the system.

[0117] 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 recovery heat pump system, characterized in that: include: A compressor, the compressor being used to compress the refrigerant; A heat recovery heat exchanger, the heat recovery heat exchanger comprising a refrigerant inlet and a refrigerant outlet connected to the refrigerant inlet; A liquid storage container, the liquid storage container comprising a liquid inlet pipe, a first two-way pipe and a second two-way pipe; An outdoor heat exchanger, the outdoor heat exchanger comprising a first refrigerant port and a second refrigerant port connected to 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 throttling device and a second throttling device; Wherein, the refrigerant inlet is connected to the outlet of the compressor through a pipeline, the refrigerant outlet is connected to the liquid inlet pipe through a pipeline, and the refrigerant outlet is connected to the first refrigerant port and / or the third refrigerant port through a pipeline; The second refrigerant port is connected to the first two-way tube through the first throttling device, and the fourth refrigerant port is connected to the second two-way tube through the second throttling device; The first refrigerant port and / or the third refrigerant port are connected to the inlet of the compressor through a pipeline.

2. The heat recovery heat pump system according to claim 1, characterized in that: The liquid inlet pipe leads to the upper part of the liquid storage container, and the first two-way pipe and the second two-way pipe lead to the bottom of the liquid storage container.

3. The heat recovery heat pump system according to claim 1, characterized in that: The heat recovery heat pump system also includes: a first reversing valve, the first reversing valve comprising 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 liquid inlet pipe; and the third valve port is connected to the first refrigerant port and / or the third refrigerant port through a pipeline.

4. The heat recovery heat pump system according to claim 3, characterized in that: The second refrigerant port is also connected to the first two-way tube through a pipeline, and the fourth refrigerant port is also connected to the second two-way tube 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 second throttling device through the liquid inlet pipe and the second two-way pipe, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the first valve port, the second valve port, the liquid inlet pipe, the second two-way pipe, the second throttling device, the fourth refrigerant port and the third refrigerant port after coming out of the compressor to form a refrigeration refrigerant circuit, and all the heat of the refrigerant is exchanged in the heat recovery heat exchanger; The first valve port is connected with the third valve port, and when the third valve port is connected with the first refrigerant port 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 port, the second refrigerant port, the first two-way pipe, the second two-way pipe, the second throttling device, the fourth refrigerant port and the third refrigerant port to form a refrigeration refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger.

5. The heat recovery heat pump system according to claim 3, characterized in that: When the first valve port is connected to the third valve port, and the third valve port is connected to the third refrigerant port 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 third refrigerant port, the fourth refrigerant port, the second two-way pipe, the first two-way pipe, the first throttling device, the second refrigerant port and the first refrigerant port to form a heating refrigerant circuit, and at least part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger; When the first valve port is connected with the second valve port, and the second valve port is connected with the first throttling device through the liquid inlet pipe and the first two-way pipe, 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 liquid inlet pipe, the first two-way pipe, the first throttling device, the second refrigerant port and the first refrigerant port 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 heat recovery heat exchanger.

6. The heat recovery heat pump system according to claim 1, characterized in that: The heat recovery heat pump system also includes: a first one-way valve, wherein the second refrigerant port is further connected to the first two-way pipe through the first one-way valve, and the conducting direction of the first one-way valve is toward the first two-way pipe; and The fourth refrigerant port is also connected to the second two-way pipe through the second one-way valve, and the conducting direction of the second one-way valve is toward the second two-way pipe.

7. The heat recovery heat pump system according to claim 3, characterized in that: The heat recovery heat pump system also includes: 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 port and / or the third refrigerant port 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 port or the third refrigerant port through a pipeline.

8. The heat recovery heat pump system according to claim 7, characterized in that: The heat recovery heat pump system also includes: 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 third valve port of the first reversing valve; the eighth valve port is connected to the first refrigerant port; the ninth valve port is connected to the inlet of the compressor; the tenth valve port is connected to the third refrigerant port; Wherein, when the seventh valve port is connected to the eighth valve port, the first refrigerant port is connected to the third valve port of the first reversing valve; When the seventh valve port is connected to the tenth valve port, the third refrigerant port is connected to the third valve port of the first reversing valve; When the eighth valve port is connected to the ninth valve port, the first refrigerant port is connected to the inlet of the compressor; When the tenth valve port is communicated with the ninth valve port, the third refrigerant port is communicated with the inlet of the compressor.

9. The heat recovery heat pump system according to claim 8, characterized in that: The first reversing valve and the second reversing valve are three-way valves, and the third reversing valve is a four-way valve.

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

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