Outdoor unit and air source heat pump system

Abstract

Disclosed in the present application are an outdoor unit and an air source heat pump system. The outdoor unit comprises a housing, an outdoor-side heat exchanger, a domestic water tank, a compressor, a heat recovery heat exchanger, a first reversing valve and a main throttling device. The housing internally comprises a first mounting area, a second mounting area and a third mounting area, wherein the first mounting area is located on one side of the third mounting area, and the second mounting area is located on the same side of the first mounting area and the third mounting area. The outdoor-side heat exchanger is mounted in the first mounting area. The domestic water tank is mounted in the second mounting area. The compressor, the heat recovery heat exchanger, the first reversing valve and the main throttling device are mounted in the third mounting area. In the present application, the domestic water tank is integrated in the outdoor unit, and the layout of components in the outdoor unit is compacted, such that the space of the outdoor unit is highly utilized, and the outdoor unit has a high degree of integration and a small size, and is low in maintenance cost, convenient to mount and less restricted by space.

Description

Outdoor unit and air energy heat pump system Technical Field

[0001] The present application relates to the technical field of outdoor units, and in particular to an outdoor unit and an air-energy heat pump system. Background Art

[0002] The outdoor unit and domestic water tank of the existing air-to-energy heat pump dual-generation or tri-generation system are separately arranged, which has low integration, complicated installation, and has great limitations on installation space. Summary of the Invention

[0003] Based on this, it is necessary to provide an outdoor unit and an air energy heat pump system to address the above technical problems.

[0004] The technical solution adopted by the present application to solve the technical problem is to construct an outdoor unit, comprising:

[0005] A housing, wherein the interior of the housing includes a first mounting area, a second mounting area, and a third mounting area, the first mounting area is located on one side of the third mounting area, and the second mounting area is located on the same side of the first mounting area and the third mounting area;

[0006] an outdoor heat exchanger, the outdoor heat exchanger being installed in the first installation area;

[0007] a domestic water tank, the domestic water tank being installed in the second installation area;

[0008] A compressor, a heat recovery heat exchanger, a first reversing valve and a main throttling device are installed in the third installation area.

[0009] In one embodiment, the domestic water tank is installed horizontally or vertically in the second installation area.

[0010] In one embodiment, the housing further includes a fourth installation area, and the fourth installation area is close to the first installation area;

[0011] The outdoor unit further includes:

[0012] An electric control board assembly is installed in the fourth installation area and is used to control various electric control components in the housing.

[0013] In one embodiment, the heat recovery heat exchanger is a shell-and-tube heat exchanger, which includes a cold water inlet, a hot water outlet connected to the cold water inlet, a refrigerant inlet, and a refrigerant outlet connected to the refrigerant inlet;

[0014] The first reversing valve includes a first valve port, a second valve port, a third valve port and a fourth valve port;

[0015] The outdoor heat exchanger includes a first refrigerant port and a second refrigerant port connected to the first refrigerant port;

[0016] The cold water inlet and the hot water outlet are connected to the domestic water tank to form a water circuit for heat energy storage, and the water circuit for heat energy storage is used to store at least part of the heat of the refrigerant in the domestic water tank when the compressor is running;

[0017] The outlet of the compressor is connected to the refrigerant inlet, and the refrigerant outlet is connected to the first valve port; the inlet of the compressor is connected to the fourth valve port;

[0018] The third valve port is connected to the first refrigerant port; one path of the second refrigerant port is connected to the inlet of the main throttling device, and the other path is connected to the outlet of the main throttling device;

[0019] The second valve port is connected to the third refrigerant port of the external air-conditioning side heat exchanger through a refrigerant pipeline, and the inlet and outlet of the main throttling device are connected to the fourth refrigerant port of the external air-conditioning side heat exchanger through a refrigerant pipeline.

[0020] In one embodiment, in the outdoor unit described in the present application, the outdoor unit further includes:

[0021] A bypass line is installed in the third installation area and communicates with the outlet of the compressor and the first valve port.

[0022] In one embodiment, the outdoor unit further comprises:

[0023] A first on-off valve and / or a second on-off valve are installed in the third installation area, wherein the first on-off valve is arranged on the bypass pipeline, and the second on-off valve is arranged on the refrigerant pipeline connecting the outlet of the compressor and the refrigerant inlet.

[0024] In one embodiment, the outdoor unit further comprises:

[0025] A liquid storage container for storing liquid refrigerant, wherein the liquid storage container is installed at the inlet end of the main throttling device in the third installation area.

[0026] In one embodiment, the outdoor unit further comprises:

[0027] A filter for filtering impurities, wherein the filter is installed at the inlet end of the main throttling device in the third installation area.

[0028] In one embodiment, the outdoor unit further comprises: a first one-way valve, a second one-way valve, a third one-way valve, and a fourth one-way valve installed in the third installation area;

[0029] The first one-way valve is provided on a refrigerant pipeline connecting the second refrigerant port and the inlet of the main throttling device, and the refrigerant flows from the second refrigerant port to the inlet of the main throttling device;

[0030] The second one-way valve is provided on the refrigerant pipeline connecting the outlet of the main throttling device and the fourth refrigerant port, and the refrigerant flows from the outlet of the main throttling device to the fourth refrigerant port;

[0031] The third one-way valve is provided on the refrigerant pipeline connecting the fourth refrigerant port and the inlet of the main throttling device, and the refrigerant flows from the fourth refrigerant port to the inlet of the main throttling device;

[0032] The fourth one-way valve is provided on the refrigerant pipeline connecting the outlet of the main throttling device and the second refrigerant port, and the refrigerant flows from the outlet of the main throttling device to the second refrigerant port.

[0033] In one embodiment, the outdoor unit further comprises:

[0034] A second reversing valve is installed in the third installation area, and the second reversing valve includes a fifth valve port, a sixth valve port and a seventh valve port. The fifth valve port is connected to the refrigerant outlet, the sixth valve port is connected to the first valve port, and the seventh valve port is connected to the inlet of the main throttling device.

[0035] In one embodiment, the fifth valve port is in communication with the sixth valve port or the fifth valve port is in communication with the seventh valve port;

[0036] When the fifth valve port is connected to the sixth valve port, the refrigerant flows out of the compressor and passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the sixth valve port, the first valve port, the third valve port, and the outdoor heat exchanger to form a cooling refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is stored in the domestic water tank through the water circuit for heat energy storage;

[0037] Alternatively, when the fifth valve port is connected to the sixth valve port, the refrigerant, after coming out of the compressor, passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the sixth valve port, the first valve port, the fourth valve port, and the air-conditioning side heat exchanger to form a heating refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is stored in the domestic water tank through the water circuit for heat energy storage;

[0038] When the fifth valve port is connected to the seventh valve port, the refrigerant comes out of the compressor and passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the seventh valve port, the main throttling device and the outdoor heat exchanger to form a refrigerant circuit of pure hot water.

[0039] In one embodiment, the outdoor unit further comprises:

[0040] A third reversing valve is installed in the third installation area, and the third reversing valve includes an eighth valve port, a ninth valve port and a tenth valve port. The eighth valve port is connected to the outlet of the compressor, the ninth valve port is connected to the refrigerant inlet, and the tenth valve port is connected to the first valve port.

[0041] In one embodiment, the first reversing valve is a four-way valve, and the second reversing valve and the third reversing valve are three-way valves.

[0042] In one embodiment, the outdoor unit further comprises: an economizer and an auxiliary throttling device installed in the third installation area, the economizer comprising a refrigerant main inlet, a refrigerant auxiliary inlet, a refrigerant main outlet, and a refrigerant auxiliary outlet;

[0043] The main refrigerant inlet, the main refrigerant outlet and the main throttling device connected in sequence are the main refrigerant circuit, and the auxiliary throttling device, the auxiliary refrigerant inlet and the auxiliary refrigerant outlet connected in sequence are the auxiliary refrigerant circuit.

[0044] One path of the second refrigerant port is connected to the fourth refrigerant port via the refrigerant main path, and the other path is connected to the enthalpy increase port of the compressor via the refrigerant auxiliary path;

[0045] The fourth refrigerant port is connected to the second refrigerant port via the main refrigerant path on one side, and is connected to the enthalpy increase port of the compressor via the auxiliary refrigerant path on the other side.

[0046] In one embodiment, the outdoor unit further comprises:

[0047] The air-conditioning side heat exchanger is installed in the third installation area.

[0048] The present application also constructs an air energy heat pump system, comprising any of the outdoor units described above.

[0049] By implementing this application, the following beneficial effects are achieved:

[0050] The present application integrates the domestic water tank into the outdoor unit and compacts the layout of various components in the outdoor unit, thereby making high use of the space of the outdoor unit, making the outdoor unit highly integrated, small in size, low in maintenance cost, easy to install and less subject to space limitations. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0052] FIG1 is a schematic diagram of the composition of the outdoor unit according to the first embodiment of the present application;

[0053] FIG2 is a schematic diagram of the flow direction of the first refrigerant for preparing hot water in cooling mode in the first embodiment of the present application;

[0054] FIG3 is a schematic diagram of the flow direction of the second refrigerant for preparing hot water in cooling mode in the first embodiment of the present application;

[0055] FIG4 is a schematic diagram of the flow direction of the first refrigerant for preparing hot water in the heating mode in the first embodiment of the present application;

[0056] FIG5 is a schematic diagram of the flow direction of the second refrigerant for preparing hot water in the heating mode in the first embodiment of the present application;

[0057] FIG6 is a schematic diagram of the refrigerant flow in the cooling mode in the first embodiment of the present application;

[0058] FIG7 is a schematic diagram of the refrigerant flow in the heating mode in the first embodiment of the present application;

[0059] FIG8 is a schematic diagram of the outdoor unit including the air-conditioning side heat exchanger according to the second embodiment of the present application;

[0060] 9 is a schematic diagram of a second installation area inside the housing in which the domestic water tank is horizontally installed in the outdoor unit of the third embodiment of the present application;

[0061] 10 is a schematic diagram of a fourth embodiment of the present application, in which the outdoor unit includes the air-conditioning side heat exchanger and the domestic water tank is horizontally installed in the second installation area inside the housing;

[0062] FIG11 is a schematic diagram of the composition of the outdoor unit according to the fifth embodiment of the present application;

[0063] FIG12 is a schematic diagram of the flow direction of the first refrigerant for preparing hot water in cooling mode in the fifth embodiment of the present application;

[0064] FIG13 is a schematic diagram of the flow direction of the second refrigerant for preparing hot water in cooling mode in the fifth embodiment of the present application;

[0065] FIG14 is a schematic diagram of the flow direction of the first refrigerant for preparing hot water in the heating mode in the fifth embodiment of the present application;

[0066] FIG15 is a schematic diagram of the flow direction of the second refrigerant for preparing hot water in the heating mode in the fifth embodiment of the present application;

[0067] FIG16 is a schematic diagram of the refrigerant flow in pure hot water mode in the fifth embodiment of the present application;

[0068] FIG17 is a schematic diagram of the refrigerant flow in the cooling mode in the fifth embodiment of the present application;

[0069] FIG18 is a schematic diagram of the refrigerant flow in the heating mode in the fifth embodiment of the present application;

[0070] FIG19 is a schematic diagram of the outdoor unit including the air-conditioning side heat exchanger according to the sixth embodiment of the present application;

[0071] 20 is a schematic diagram of a second installation area inside the housing in which the domestic water tank is horizontally installed in the outdoor unit of the seventh embodiment of the present application;

[0072] 21 is a schematic diagram of the outdoor unit of the eighth embodiment of the present application, including the air-conditioning side heat exchanger and the domestic water tank being horizontally installed in the second installation area inside the shell. DETAILED DESCRIPTION

[0073] In order to have a clearer understanding of the technical features, purposes and effects of this application, the specific implementation methods of this application are now described in detail with reference to the accompanying drawings.

[0074] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. In the description of the application, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application 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 this application. 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. Thus, features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, the meaning of "multiple" is two or more.

[0075] In the description of this application, 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 can refer to fixed connections, detachable connections, or integral connections; mechanical connections or chemical connections; direct connections or 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 this application based on specific circumstances.

[0076] As shown in FIG1 , the first embodiment discloses an outdoor unit 10 , including a housing 101 , an outdoor heat exchanger 102 , a domestic water tank 103 , a compressor 104 , a heat recovery heat exchanger 105 , a first reversing valve 106 , and a main throttling device 107 , specifically as follows:

[0077] The interior of the shell 101 includes a first installation area 1011, a second installation area 1012 and a third installation area 1013. The first installation area 1011 is located on one side of the third installation area 1013, and the second installation area 1012 is located on the same side of the first installation area 1011 and the third installation area 1013.

[0078] The outdoor heat exchanger 102 is installed in the first installation area 1011. The domestic water tank 103 is installed in the second installation area 1012. The compressor 104, the heat recovery heat exchanger 105, the first reversing valve 106 and the main throttling device 107 are installed in the third installation area 1013.

[0079] In this embodiment, the domestic water tank 103 is vertically installed in the second installation area 1012. For example, the domestic water tank 103 is a stainless steel water tank. It can be understood that in some other embodiments, the domestic water tank 103 is a plastic water tank, which is not limited here.

[0080] In this embodiment, the outdoor unit 10 further includes a liquid storage container 110 for storing liquid refrigerant, and the liquid storage container 110 is installed at the inlet end of the main throttling device 107 in the third installation area 1013.

[0081] In this embodiment, the compressor 104 is used to output refrigerant. The heat recovery heat exchanger 105 heats the domestic water flowing through it through heat exchange. The heat recovery heat exchanger 105 is a double-tube heat exchanger, comprising a cold water inlet 1051, a hot water outlet 1052 connected to the cold water inlet 1051, a refrigerant inlet 1053, and a refrigerant outlet 1054 connected to the refrigerant inlet 1053. The first reversing valve 106 comprises a first valve port 1061, a second valve port 1062, a third valve port 1063, and a fourth valve port 1064. For example, the first reversing valve 106 is a four-way valve. The outdoor heat exchanger 102 comprises a first refrigerant port 1021 and a second refrigerant port 1022 connected to the first refrigerant port 1021. For example, the outdoor heat exchanger 102 is a finned heat exchanger, comprising fan blades, a fan motor, and a heat dissipation grille. Furthermore, the main throttling device 107 is an expansion valve.

[0082] The cold water inlet 1051 and the hot water outlet 1052 are connected to the domestic water tank 103 to form a water circuit for heat storage. The water circuit for heat storage is used to store at least part of the heat of the refrigerant in the domestic water tank 103 when the compressor 104 is operating. That is, at least part of the heat of the refrigerant output by the compressor 104 is heat-exchanged with the water in the domestic water tank 103 in the heat recovery heat exchanger 105 to prepare hot water. The outlet of the compressor 104 is connected to the refrigerant inlet 1053, the refrigerant outlet 1054 is connected to the first valve port 1061, and the inlet of the compressor 104 is connected to the fourth valve port 1064.

[0083] The third valve port 1063 is connected to the first refrigerant port 1021. The second refrigerant port 1022 is connected to the inlet of the main throttling device 107 through one path, specifically connected to the inlet of the main throttling device 107 through the liquid storage container 110, that is, not directly connected, and is connected to the outlet of the main throttling device 107 through another path.

[0084] The second valve port 1062 is connected to the third refrigerant port 203 of the external air-conditioning-side heat exchanger 20 via a refrigerant pipeline. The inlet and outlet of the main throttling device 107 are connected to the fourth refrigerant port 204 of the external air-conditioning-side heat exchanger 20 via a refrigerant pipeline. Specifically, the fourth refrigerant port 204 of the air-conditioning-side heat exchanger 20 is connected to the outlet of the main throttling device 107 on one side and to the inlet of the main throttling device 107 on the other side. This port is specifically connected to the inlet of the main throttling device 107 via the liquid storage container 110, i.e., it is not directly connected. For example, the air-conditioning-side heat exchanger 20 is a plate heat exchanger.

[0085] In this embodiment, the outdoor unit 10 further includes a bypass pipe, which is installed in the third installation area 1013 and connects the outlet of the compressor 104 and the first valve port 1061. The setting of the bypass pipe can use waste heat (partial heat) to heat domestic water.

[0086] In addition, the outdoor unit 10 also includes a first switch valve 108 and / or a second switch valve 109 installed in the third installation area 1013. The first switch valve 108 is arranged on the bypass pipeline, and the second switch valve 109 is arranged on the refrigerant pipeline connecting the outlet of the compressor 104 and the refrigerant inlet 1053. For example, the first switch valve 108 and the second switch valve 109 are solenoid valves.

[0087] The first reversing valve 106 is used to switch the flow direction of the refrigerant to achieve switching between cooling mode and heating mode. The first on-off valve 108 and the second on-off valve 109 are used to switch the flow direction of the refrigerant to regulate the amount of refrigerant entering the heat recovery heat exchanger 105 to achieve waste heat recovery.

[0088] When waste heat recovery is required, that is, part of the heat is used to heat domestic water, the first switch valve 108 on the bypass pipeline is closed, and only the second switch valve 109 on the refrigerant pipeline connecting the outlet of the compressor 104 and the refrigerant inlet 1053 is opened, as shown in Figures 2 and 4.

[0089] When waste heat recovery is required, that is, part of the heat is used to heat domestic water, and the amount of refrigerant entering the heat recovery heat exchanger 105 is reduced, the first switch valve 108 and the second switch valve 109 are opened at the same time, as shown in Figures 3 and 5.

[0090] When the domestic hot water reaches the set temperature or only cooling or heating is required, the second switch valve 109 on the refrigerant pipeline connecting the outlet of the compressor 104 and the refrigerant inlet 1053 can be closed, and only the first switch valve 108 on the bypass pipeline can be opened, as shown in Figures 6 and 7.

[0091] In this embodiment, the outdoor unit 10 also includes a filter 111 for filtering impurities. The filter 111 is installed at the inlet end of the main throttling device 107 in the third installation area 1013. Preferably, the filter 111 is arranged between the inlet of the main throttling device 107 and the outlet of the liquid storage container 110.

[0092] In this embodiment, the outdoor unit 10 further includes a first one-way valve 112, a second one-way valve 113, a third one-way valve 114, and a fourth one-way valve 115 installed in the third installation area 1013. Specifically:

[0093] The first one-way valve 112 is provided on the refrigerant pipeline connecting the second refrigerant port 1022 and the inlet of the main throttling device 107 , and the refrigerant flows from the second refrigerant port 1022 to the inlet of the main throttling device 107 .

[0094] The second one-way valve 113 is provided on the refrigerant pipeline connecting the outlet of the main throttling device 107 and the fourth refrigerant port 204 , and the refrigerant flows from the outlet of the main throttling device 107 to the fourth refrigerant port 204 .

[0095] The third one-way valve 114 is provided on the refrigerant pipeline connecting the fourth refrigerant port 204 and the inlet of the main throttling device 107 , and the refrigerant flows from the fourth refrigerant port 204 to the inlet of the main throttling device 107 .

[0096] The fourth one-way valve 115 is provided on the refrigerant pipeline connecting the outlet of the main throttling device 107 and the second refrigerant port 1022 , and the refrigerant flows from the outlet of the main throttling device 107 to the second refrigerant port 1022 .

[0097] In this embodiment, the outdoor unit 10 further includes a gas-liquid separator 116 . The gas-liquid separator 116 is installed in the third installation area 1013 . The gas-liquid separator 116 is disposed between the inlet of the compressor 104 and the second valve port 1062 .

[0098] In this embodiment, the housing 101 further includes a fourth installation area 1014, which is adjacent to the first installation area 1011. Furthermore, the outdoor unit 10 further includes an electric control board assembly, which is installed in the fourth installation area 1014 and is used to control various electronically controlled components within the housing 101, such as the compressor 104, the first reversing valve 106, the main throttling device 107, the first on-off valve 108, and the second on-off valve 109.

[0099] In addition, the external air-conditioning-side heat exchanger 20 further includes a water circulation inlet 201 and a water circulation outlet 202 connected to the water circulation inlet 201. The water circulation inlet 201 and the water circulation outlet 202 are connected to the terminal. The refrigerant exchanges heat with the circulating water in the terminal in the air-conditioning-side heat exchanger 20. For example, the terminal includes an air conditioner 30 and / or a floor heating device 40, the water circulation inlet 201 is connected to the outlet of the air conditioner 30 and / or the floor heating device 40 via a pipeline, and the water circulation outlet 202 is connected to the inlet of the air conditioner 30 and / or the floor heating device 40 via a pipeline.

[0100] In different situations, different valve ports will be connected, as follows:

[0101] As shown in FIG2 , in cooling mode, the first on-off valve 108 is closed, the second on-off valve 109 is open, the first valve port 1061 is connected to the third valve port 1063, and the second valve port 1062 is connected to the fourth valve port 1064. That is, when hot water needs to be prepared in cooling mode, the high-temperature gas output by the compressor 104 passes through the second on-off valve 109 and enters the refrigerant inlet 1053 of the heat recovery heat exchanger 105. In the heat recovery heat exchanger 105, the high-temperature gas exchanges heat with the water in the domestic water tank 103, and after preparing hot water, it becomes medium-temperature gas. The medium-temperature gas output from the refrigerant outlet 1054 of the heat recovery heat exchanger 105 passes through the first valve port 1061 and the third valve port 1063 and enters the first refrigerant port 1021 of the outdoor heat exchanger 102. The medium-temperature gas condenses and releases in the outdoor heat exchanger 102. After being heated, it becomes a medium-temperature liquid. The medium-temperature liquid output from the second refrigerant port 1022 of the outdoor side heat exchanger 102 is throttled and cooled by the main throttling device 107 to become a low-temperature liquid, and then enters the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20. The low-temperature liquid exchanges heat with the circulating water in the end in the air-conditioning side heat exchanger 20, and the low-temperature liquid absorbs the heat of the circulating water and evaporates to become a low-temperature gas. The low-temperature gas output from the third refrigerant port 203 of the air-conditioning side heat exchanger 20 passes through the second valve port 1062 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, and circulates back and forth. The heat recovery heat exchanger 105 is connected to the domestic water tank 103, so that at least part of the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 102 can be recovered and utilized during summer cooling, avoiding the waste of all heat in the heat exchange between the outdoor heat exchanger 102 and the air. The recovered heat is exchanged with the water in the domestic water tank 103 in the heat recovery heat exchanger 105 to prepare hot water, thereby improving energy utilization.

[0102] As shown in FIG3 , in cooling mode, the first on-off valve 108 and the second on-off valve 109 are open, the first valve port 1061 is connected to the third valve port 1063, and the second valve port 1062 is connected to the fourth valve port 1064. That is, when hot water needs to be prepared in cooling mode, the high-temperature gas output by the compressor 104 passes through the second on-off valve 109 and enters the refrigerant inlet 1053 of the heat recovery heat exchanger 105. The other path passes through the first on-off valve 108, the first valve port 1061, and the third valve port 1063 and enters the first refrigerant port 1021 of the outdoor heat exchanger 102. The high-temperature gas exchanges heat with the water in the domestic water tank 103 in the heat recovery heat exchanger 105, and after preparing hot water, it becomes medium-temperature gas. The medium-temperature gas output from the refrigerant outlet 1054 of the heat recovery heat exchanger 105 passes through the first valve port 1061 and the third valve port 1063 and enters the outdoor heat exchanger 102. The medium-temperature gas passes through the first refrigerant port 1021 and condenses and releases heat in the outdoor heat exchanger 102 to become a medium-temperature liquid. The medium-temperature liquid output from the second refrigerant port 1022 of the outdoor heat exchanger 102 is throttled and cooled by the main throttling device 107 to become a low-temperature liquid, and then enters the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20. The low-temperature liquid exchanges heat with the circulating water in the end in the air-conditioning side heat exchanger 20, and the low-temperature liquid absorbs the heat of the circulating water and evaporates to become a low-temperature gas. The low-temperature gas output from the third refrigerant port 203 of the air-conditioning side heat exchanger 20 passes through the second valve port 1062 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, and circulates back and forth. The heat recovery heat exchanger 105 is connected to the domestic water tank 103, so that at least part of the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 102 can be recovered and utilized during summer cooling, avoiding the waste of all heat in the heat exchange between the outdoor heat exchanger 102 and the air. The recovered heat is exchanged with the water in the domestic water tank 103 in the heat recovery heat exchanger 105 to prepare hot water, thereby improving energy utilization.

[0103] Specifically, the difference between the embodiments shown in Figure 2 and Figure 3 is that in the embodiment shown in Figure 3, an additional refrigerant path passes through the first switch valve 108, the first valve port 1061 and the third valve port 1063 to enter the first refrigerant port 1021 of the outdoor heat exchanger 102, which can better regulate the amount of refrigerant entering the heat recovery heat exchanger 105.

[0104] As shown in FIG4 , in the heating mode, the first on-off valve 108 is closed, the second on-off valve 109 is opened, the first valve port 1061 is connected to the second valve port 1062, and the third valve port 1063 is connected to the fourth valve port 1064. That is, when hot water needs to be prepared in the heating mode, the high-temperature gas output by the compressor 104 passes through the second on-off valve 109 and enters the refrigerant inlet 1053 of the heat recovery heat exchanger 105. The high-temperature gas exchanges heat with the water in the domestic water tank 103 in the heat recovery heat exchanger 105, and becomes medium-temperature gas after preparing hot water. The medium-temperature gas output from the refrigerant outlet 1054 of the heat recovery heat exchanger 105 passes through the first valve port 1061 and the second valve port 1062 and enters the third refrigerant port 203 of the air-conditioning side heat exchanger 20. The medium-temperature gas is discharged from the refrigerant outlet 1054 of the heat recovery heat exchanger 105. 0 undergoes heat exchange with the circulating water in the terminal, becoming a medium-temperature liquid. The medium-temperature liquid output from the fourth refrigerant port 204 of the air-conditioning-side heat exchanger 20 is throttled and cooled by the main throttling device 107, becoming a low-temperature liquid. It then enters the second refrigerant port 1022 of the outdoor heat exchanger 102. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 102, becoming a low-temperature gas. The low-temperature gas output from the first refrigerant port 1021 of the outdoor heat exchanger 102 passes through the third valve port 1063 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, thus repeating the cycle. The heat recovery heat exchanger 105 is connected to the domestic water tank 103, allowing for simultaneous heating in winter and hot water production, thereby improving energy efficiency.

[0105] As shown in FIG5 , in the heating mode, the first on-off valve 108 and the second on-off valve 109 are open, the first valve port 1061 is connected to the second valve port 1062, and the third valve port 1063 is connected to the fourth valve port 1064. That is, when hot water needs to be prepared in the heating mode, the high-temperature gas output by the compressor 104 passes through the second on-off valve 109 and enters the refrigerant inlet 1053 of the heat recovery heat exchanger 105. The other path passes through the first on-off valve 108, the first valve port 1061, and the second valve port 1062 and enters the third refrigerant port 203 of the air-conditioning side heat exchanger 20. The high-temperature gas exchanges heat with the water in the domestic water tank 103 in the heat recovery heat exchanger 105, and after preparing hot water, it becomes medium-temperature gas. The medium-temperature gas output from the refrigerant outlet 1054 of the heat recovery heat exchanger 105 passes through the first valve port 1061 and the second valve port 1062 and enters the air-conditioning side heat exchanger 20. At the third refrigerant port 203 of the outdoor heat exchanger 20, the medium-temperature gas undergoes heat exchange with the circulating water in the terminal at the air conditioning side heat exchanger 20, becoming a medium-temperature liquid. The medium-temperature liquid output from the fourth refrigerant port 204 of the air conditioning side heat exchanger 20 is throttled and cooled by the main throttling device 107 to become a low-temperature liquid. The liquid then enters the second refrigerant port 1022 of the outdoor heat exchanger 102. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 102, becoming a low-temperature gas. The low-temperature gas output from the first refrigerant port 1021 of the outdoor heat exchanger 102 passes through the third valve port 1063 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, thus repeating the cycle. The heat recovery heat exchanger 105 is connected to the domestic water tank 103, thereby enabling the production of hot water while providing heating in winter, thereby improving energy efficiency.

[0106] Specifically, the difference between the embodiments shown in Figure 4 and Figure 5 is that in the embodiment shown in Figure 5, there is an additional path through the first switch valve 108, the first valve port 1061 and the second valve port 1062 to enter the third refrigerant port 203 of the air-conditioning side heat exchanger 20, which can better regulate the amount of refrigerant entering the heat recovery heat exchanger 105.

[0107] As shown in FIG6 , in the cooling mode, the first switch valve 108 is open, the second switch valve 109 is closed, the first valve port 1061 is connected to the third valve port 1063 , and the second valve port 1062 is connected to the fourth valve port 1064 . That is, when cooling alone is performed in summer, the high-temperature gas output by the compressor 104 passes through the first switch valve 108, the first valve port 1061 and the third valve port 1063 and enters the first refrigerant port 1021 of the outdoor heat exchanger 102. The high-temperature gas condenses and releases heat in the outdoor heat exchanger 102 and becomes a medium-temperature liquid. The medium-temperature liquid output from the second refrigerant port 1022 of the outdoor heat exchanger 102 is throttled and cooled by the main throttling device 107 and becomes a low-temperature liquid. Then, it enters the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20. The low-temperature liquid exchanges heat with the circulating water in the end in the air-conditioning side heat exchanger 20, and the low-temperature liquid absorbs the heat of the circulating water and evaporates to become a low-temperature gas. The low-temperature gas output from the third refrigerant port 203 of the air-conditioning side heat exchanger 20 passes through the second valve port 1062 and the fourth valve port 1064 and returns to the inlet of the compressor 104, and the cycle repeats.

[0108] As shown in FIG. 7 , in the heating mode, the first switch valve 108 is open, the second switch valve 109 is closed, the first valve port 1061 is connected to the second valve port 1062 , and the third valve port 1063 is connected to the fourth valve port 1064 . That is, when heating alone is used in winter, the high-temperature gas output by the compressor 104 passes through the first switch valve 108, the first valve port 1061 and the second valve port 1062 and enters the third refrigerant port 203 of the air-conditioning side heat exchanger 20. The high-temperature gas becomes a medium-temperature liquid after heat exchange with the circulating water in the terminal in the air-conditioning side heat exchanger 20. The medium-temperature liquid output by the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20 is throttled and cooled by the main throttling device 107 and becomes a low-temperature liquid. Then, it enters the second refrigerant port 1022 of the outdoor heat exchanger 102. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 102 and becomes a low-temperature gas. The low-temperature gas output by the first refrigerant port 1021 of the outdoor heat exchanger 102 passes through the third valve port 1063 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, and the cycle repeats.

[0109] It should be noted that the terms "high," "medium," and "low" are relative terms, and "gas" can also refer to a gas-liquid two-phase state or a gaseous state, without limitation. Furthermore, the heat recovery heat exchanger 105 is not required during both cooling and heating processes; it only passes through it when recovering waste heat. If the hot water reaches a certain temperature, the heat from the compressor 104 can also directly reach the first reversing valve 106.

[0110] As shown in Figure 8, the second embodiment discloses an outdoor unit 10, including the contents of the above-mentioned first embodiment, which will not be repeated here, but the difference compared with the first embodiment is that the air-conditioning side heat exchanger 20 is installed in the third installation area 1013 inside the shell 101.

[0111] As shown in Figure 9, the third embodiment discloses an outdoor unit 10, including the contents of the above-mentioned first embodiment, which will not be repeated here. However, the difference compared with the first embodiment is that the domestic water tank 103 is horizontally installed in the second installation area 1012 inside the shell 101.

[0112] As shown in Figure 10, the fourth embodiment discloses an outdoor unit 10, including the contents of the above-mentioned second embodiment, which will not be repeated here, but the difference compared with the second embodiment is that the domestic water tank 103 is horizontally installed in the second installation area 1012 inside the shell 101.

[0113] As shown in FIG11 , the fifth embodiment discloses an outdoor unit 10, including the contents of the first embodiment described above, which will not be repeated here. However, compared to the first embodiment, the outdoor unit 10 further comprises a second reversing valve 117 installed in the third installation area 1013. The second reversing valve 117 includes a fifth valve port 1171, a sixth valve port 1172, and a seventh valve port 1173. The fifth valve port 1171 is connected to the refrigerant outlet 1054, the sixth valve port 1172 is connected to the first valve port 1061, and the seventh valve port 1173 is connected to the inlet of the main throttling device 107. For example, the second reversing valve 117 is a three-way valve.

[0114] The second reversing valve 117 is used to switch the flow direction of the refrigerant to achieve switching between the cooling mode and the pure hot water mode, and between the heating mode and the pure hot water mode. The fifth valve port 1171 is connected to the sixth valve port 1172 or the fifth valve port 1171 is connected to the seventh valve port 1173.

[0115] When the fifth valve port 1171 is connected to the sixth valve port 1172, the refrigerant comes out of the compressor 104 and passes through the refrigerant inlet 1053, the refrigerant outlet 1054, the fifth valve port 1171, the sixth valve port 1172, the first valve port 1061, the third valve port 1063 and the outdoor heat exchanger 102 to form a cooling refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is stored in the domestic water tank 103 through the heat energy storage water circuit.

[0116] Alternatively, when the fifth valve port 1171 is connected to the sixth valve port 1172, the refrigerant comes out of the compressor 104 and passes through the refrigerant inlet 1053, the refrigerant outlet 1054, the fifth valve port 1171, the sixth valve port 1172, the first valve port 1061, the third valve port 1063 and the air-conditioning side heat exchanger 20 to form a heating refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is stored in the domestic water tank 103 through the heat energy storage water circuit.

[0117] When the fifth valve port 1171 is connected to the seventh valve port 1173, the refrigerant comes out of the compressor 104 and passes through the refrigerant inlet 1053, the refrigerant outlet 1054, the fifth valve port 1171, the seventh valve port 1173, the main throttling device 107 and the outdoor heat exchanger 102 to form a refrigerant circuit of pure hot water.

[0118] In this embodiment, the outdoor unit 10 further includes a third reversing valve 118 installed in the third installation area 1013. The third reversing valve 118 replaces the first on / off valve 108 and the second on / off valve 109. The third reversing valve 118 includes an eighth valve port 1181, a ninth valve port 1182, and a tenth valve port 1183. The eighth valve port 1181 is connected to the outlet of the compressor 104, the ninth valve port 1182 is connected to the refrigerant inlet 1053, and the tenth valve port 1183 is connected to the first valve port 1061. For example, the third reversing valve 118 is a three-way valve.

[0119] The third reversing valve 118 is used to switch the flow direction of the refrigerant to regulate the amount of refrigerant entering the heat recovery heat exchanger 105 to achieve waste heat recovery. The eighth valve port 1181 is connected to the ninth valve port 1182, the eighth valve port 1181 is connected to the tenth valve port 1183, or the eighth valve port 1181 is connected to the ninth valve port 1182 and the tenth valve port 1183.

[0120] When the eighth valve port 1181 is connected to the ninth valve port 1182 , the refrigerant flows out of the compressor 104 and enters the refrigerant inlet 1053 through the eighth valve port 1181 and the ninth valve port 1182 .

[0121] When the eighth valve port 1181 is connected to the tenth valve port 1183, the refrigerant comes out of the compressor 104 and passes through the eighth valve port 1181, the tenth valve port 1183, the first valve port 1061 and the third valve port 1063 to enter the first refrigerant port 1021 of the outdoor heat exchanger 102, or the refrigerant comes out of the compressor 104 and passes through the eighth valve port 1181, the tenth valve port 1183, the first valve port 1061 and the second valve port 1062 to enter the third refrigerant port 203 of the air-conditioning side heat exchanger 20.

[0122] When the eighth valve port 1181 is connected with the ninth valve port 1182 and the tenth valve port 1183, the refrigerant comes out of the compressor 104 and passes through the eighth valve port 1181 and the ninth valve port 1182 to enter the refrigerant inlet 1053 in one way, and passes through the eighth valve port 1181, the tenth valve port 1183, the first valve port 1061 and the third valve port 1063 to enter the first refrigerant port 1021 of the outdoor heat exchanger 102, or passes through the eighth valve port 1181, the tenth valve port 1183, the first valve port 1061 and the second valve port 1062 to enter the third refrigerant port 203 of the air-conditioning side heat exchanger 20.

[0123] In this embodiment, the outdoor unit 10 also includes: an economizer 119 and an auxiliary throttling device 120 installed in the third installation area 1013, and the economizer 119 includes a refrigerant main inlet 1191, a refrigerant auxiliary inlet 1192, a refrigerant main outlet 1193 and a refrigerant auxiliary outlet 1194.

[0124] Among them, the refrigerant main inlet 1191, the refrigerant main outlet 1193 and the main throttling device 107 connected in sequence are the refrigerant main path, and the auxiliary throttling device 120, the refrigerant auxiliary inlet 1192 and the refrigerant auxiliary outlet 1194 connected in sequence are the refrigerant auxiliary path.

[0125] The second refrigerant port 1022 is connected to the fourth refrigerant port 204 via the main refrigerant path on one side, and is connected to the enthalpy increase port 1041 of the compressor 104 on the other side via the auxiliary refrigerant path on the other side. The fourth refrigerant port 204 is connected to the second refrigerant port 1022 via the main refrigerant path on one side, and is connected to the enthalpy increase port 1041 of the compressor 104 on the other side via the auxiliary refrigerant path on the other side.

[0126] By adding the economizer 119 and the auxiliary throttling device 120 at the outlet of the condenser (the outdoor side heat exchanger 102 or the air-conditioning side heat exchanger 20), the refrigerant coming out of the condenser 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 auxiliary throttling device 120, the refrigerant heat from the refrigerant main path can be more efficiently absorbed in the economizer 119. After absorbing heat, the refrigerant vaporizes and enters the enthalpy increase port 1041 of the compressor 104, thereby further reducing the temperature of the refrigerant in the refrigerant main path and improving the terminal refrigeration effect.

[0127] It is understandable that in other embodiments, if the length and complexity of the pipeline do not need to be considered, the compressor 104 may not be provided with the enthalpy increase port 1041, but the refrigerant in the enthalpy increase auxiliary circuit can be directly introduced into the gas-liquid separator 116 and enter the compressor 104.

[0128] Specifically, after the temperature of the refrigerant in the main refrigerant circuit is reduced through heat exchange, the temperature is further reduced through the main throttling device 107 before entering the evaporator (the outdoor side heat exchanger 102 or the air-conditioning side heat exchanger 20), thereby improving the heat absorption performance of the refrigerant, that is, improving the cooling effect of the system.

[0129] In addition, the output end of the liquid storage container 110 is connected to the auxiliary throttling device 120 on one side and to the refrigerant main inlet 1191 on the other side. The input end of the liquid storage container 110 is respectively connected to the main throttling device 107 and the seventh valve port 1173. In some embodiments, the input end of the liquid storage container 110 is also connected to the outlet end of the air conditioner-side heat exchanger 20.

[0130] In different situations, different valve ports will be connected, as follows:

[0131] As shown in FIG12 , in cooling mode, the eighth valve port 1181 is connected to the ninth valve port 1182, the fifth valve port 1171 is connected to the sixth valve port 1172, the first valve port 1061 is connected to the third valve port 1063, and the second valve port 1062 is connected to the fourth valve port 1064. That is, when hot water needs to be prepared in cooling mode, the high-temperature gas output by the compressor 104 passes through the eighth valve port 1181 and the ninth valve port 1182 and enters the refrigerant inlet 1053 of the heat recovery heat exchanger 105. The high-temperature gas exchanges heat with the water in the domestic water tank 103 in the heat recovery heat exchanger 105, and becomes medium-temperature gas after preparing hot water. The medium-temperature gas output from the refrigerant outlet 1054 of the heat recovery heat exchanger 105 passes through the fifth valve port 1171, the sixth valve port 1172, the first valve port 1061, and the third valve port 106 3 and then enters the first refrigerant port 1021 of the outdoor heat exchanger 102. The medium-temperature gas condenses and releases heat in the outdoor heat exchanger 102 and becomes a medium-temperature liquid. The medium-temperature liquid output from the second refrigerant port 1022 of the outdoor heat exchanger 102 passes through the refrigerant main path and the enthalpy-increasing auxiliary path respectively. The medium-temperature liquid in the enthalpy-increasing auxiliary path is throttled and cooled by the auxiliary throttling device 120 to become a low-temperature liquid. The low-temperature liquid absorbs the refrigerant heat from the refrigerant main path in the economizer 119 and becomes a relatively low-temperature gas. Finally, it enters the enthalpy-increasing port 1041 of the compressor 104. The medium-temperature liquid in the main refrigerant circuit is turned into a low-temperature liquid after its temperature is reduced by heat exchange, and is further throttled and cooled by the main throttling device 107 to become a low-temperature liquid with a lower temperature, and then enters the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20. The low-temperature liquid exchanges heat with the circulating water in the end in the air-conditioning side heat exchanger 20, and the low-temperature liquid absorbs the heat of the circulating water and evaporates to become a low-temperature gas. The low-temperature gas output from the third refrigerant port 203 of the air-conditioning side heat exchanger 20 passes through the second valve port 1062 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, and circulates back and forth. The heat recovery heat exchanger 105 is connected to the domestic water tank 103, so that at least part of the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 102 can be recovered and utilized during summer cooling, avoiding the waste of all heat in the heat exchange between the outdoor heat exchanger 102 and the air. The recovered heat is exchanged with the water in the domestic water tank 103 in the heat recovery heat exchanger 105 to prepare hot water, thereby improving energy utilization.

[0132] As shown in Figure 13, in the refrigeration mode, the eighth valve port 1181 is connected to the ninth valve port 1182, the eighth valve port 1181 is connected to the tenth valve port 1183, the fifth valve port 1171 is connected to the sixth valve port 1172, the first valve port 1061 is connected to the third valve port 1063, and the second valve port 1062 is connected to the fourth valve port 1064. That is, when hot water needs to be prepared in the cooling mode, the high-temperature gas output by the compressor 104 passes through the eighth valve port 1181 and the ninth valve port 1182 to enter the refrigerant inlet 1053 of the heat recovery heat exchanger 105, and the other way passes through the eighth valve port 1181, the tenth valve port 1183, the first valve port 1061 and the third valve port 1063 to enter the first refrigerant port 1021 of the outdoor heat exchanger 102. The high-temperature gas exchanges heat with the water in the domestic water tank 103 in the heat recovery heat exchanger 105, and becomes medium-temperature gas after preparing hot water. The refrigerant outlet 1054 of the heat recovery heat exchanger 105 outputs The medium-temperature gas passes through the first valve port 1061 and the third valve port 1063 and enters the first refrigerant port 1021 of the outdoor heat exchanger 102. The medium-temperature gas condenses and releases heat in the outdoor heat exchanger 102 and becomes a medium-temperature liquid. The medium-temperature liquid output from the second refrigerant port 1022 of the outdoor heat exchanger 102 passes through the refrigerant main path and the enthalpy increase auxiliary path respectively. The medium-temperature liquid in the enthalpy increase auxiliary path is throttled and cooled by the auxiliary throttling device 120 to become a low-temperature liquid. The low-temperature liquid absorbs the refrigerant heat from the refrigerant main path in the economizer 119 and becomes a relatively low-temperature gas, and finally enters the enthalpy increase port 1041 of the compressor 104. The medium-temperature liquid in the main refrigerant circuit is turned into a low-temperature liquid after its temperature is reduced by heat exchange, and is further throttled and cooled by the main throttling device 107 to become a low-temperature liquid with a lower temperature, and then enters the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20. The low-temperature liquid exchanges heat with the circulating water in the end in the air-conditioning side heat exchanger 20, and the low-temperature liquid absorbs the heat of the circulating water and evaporates to become a low-temperature gas. The low-temperature gas output from the third refrigerant port 203 of the air-conditioning side heat exchanger 20 passes through the second valve port 1062 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, and circulates back and forth. The heat recovery heat exchanger 105 is connected to the domestic water tank 103, so that at least part of the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 102 can be recovered and utilized during summer cooling, avoiding the waste of all heat in the heat exchange between the outdoor heat exchanger 102 and the air. The recovered heat is exchanged with the water in the domestic water tank 103 in the heat recovery heat exchanger 105 to prepare hot water, thereby improving energy utilization.

[0133] Specifically, the difference between the embodiments shown in Figure 12 and Figure 13 is that in the embodiment shown in Figure 13, an additional refrigerant path passes through the eighth valve port 1181, the tenth valve port 1183, the first valve port 1061 and the third valve port 1063 to enter the first refrigerant port 1021 of the outdoor heat exchanger 102, which can better regulate the amount of refrigerant entering the heat recovery heat exchanger 105.

[0134] As shown in FIG14 , in the heating mode, the eighth valve port 1181 is connected to the ninth valve port 1182, the fifth valve port 1171 is connected to the sixth valve port 1172, the first valve port 1061 is connected to the second valve port 1062, and the third valve port 1063 is connected to the fourth valve port 1064. That is, when hot water needs to be prepared in the heating mode, the high-temperature gas output by the compressor 104 passes through the eighth valve port 1181 and the ninth valve port 1182 and enters the refrigerant inlet 1053 of the heat recovery heat exchanger 105. The high-temperature gas exchanges heat with the water in the domestic water tank 103 in the heat recovery heat exchanger 105, and after preparing hot water, it becomes medium-temperature gas. The medium-temperature gas output from the refrigerant outlet 1054 of the heat recovery heat exchanger 105 passes through the fifth valve port 1171, the sixth valve port 1172, the first valve port 1061, and the second valve port 1062. The medium-temperature gas enters the third refrigerant port 203 of the air-conditioning side heat exchanger 20, and becomes a medium-temperature liquid after heat exchange with the circulating water in the terminal in the air-conditioning side heat exchanger 20. The medium-temperature liquid output from the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20 passes through the refrigerant main path and the enthalpy increase auxiliary path respectively. The medium-temperature liquid in the enthalpy increase auxiliary path is throttled and cooled by the auxiliary throttling device 120 to become a low-temperature liquid. The low-temperature liquid absorbs the refrigerant heat from the refrigerant main path in the economizer 119 and becomes a relatively low-temperature gas, and finally enters the enthalpy increase port 1041 of the compressor 104. The medium-temperature liquid in the main refrigerant circuit is cooled by heat exchange and becomes a low-temperature liquid. It is then throttled and cooled by the main throttling device 107 to become an even lower-temperature liquid. The liquid then enters the second refrigerant port 1022 of the outdoor heat exchanger 102. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 102, becoming a low-temperature gas. The low-temperature gas output from the first refrigerant port 1021 of the outdoor heat exchanger 102 passes through the third valve port 1063 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, repeating the cycle. The heat recovery heat exchanger 105 is connected to the domestic water tank 103, allowing for simultaneous heating in winter and hot water production, thereby improving energy efficiency.

[0135] As shown in Figure 15, in the heating mode, the eighth valve port 1181 is connected to the ninth valve port 1182, the eighth valve port 1181 is connected to the tenth valve port 1183, the fifth valve port 1171 is connected to the sixth valve port 1172, the first valve port 1061 is connected to the second valve port 1062, and the third valve port 1063 is connected to the fourth valve port 1064. That is, when hot water needs to be prepared in the heating mode, the high-temperature gas output by the compressor 104 passes through the eighth valve port 1181 and the ninth valve port 1182 to enter the refrigerant inlet 1053 of the heat recovery heat exchanger 105, and passes through the eighth valve port 1181, the tenth valve port 1183, the first valve port 1061 and the second valve port 1062 to enter the third refrigerant port 203 of the air-conditioning side heat exchanger 20. The high-temperature gas exchanges heat with the water in the domestic water tank 103 in the heat recovery heat exchanger 105, and becomes medium-temperature gas after preparing hot water. The medium-temperature gas outputted from the refrigerant outlet 1054 of the heat recovery heat exchanger 105 is The medium-temperature gas passes through the first valve port 1061 and the second valve port 1062 and enters the third refrigerant port 203 of the air-conditioning side heat exchanger 20. The medium-temperature gas is converted into medium-temperature liquid after heat exchange with the circulating water in the terminal in the air-conditioning side heat exchanger 20. The medium-temperature liquid output from the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20 passes through the refrigerant main path and the enthalpy increase auxiliary path respectively. The medium-temperature liquid in the enthalpy increase auxiliary path is throttled and cooled by the auxiliary throttling device 120 to become a low-temperature liquid. The low-temperature liquid absorbs the refrigerant heat from the refrigerant main path in the economizer 119 and becomes a relatively low-temperature gas, and finally enters the enthalpy increase port 1041 of the compressor 104. The medium-temperature liquid in the main refrigerant circuit is cooled by heat exchange and becomes a low-temperature liquid. It is then throttled and cooled by the main throttling device 107 to become an even lower-temperature liquid. The liquid then enters the second refrigerant port 1022 of the outdoor heat exchanger 102. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 102, becoming a low-temperature gas. The low-temperature gas output from the first refrigerant port 1021 of the outdoor heat exchanger 102 passes through the third valve port 1063 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, repeating the cycle. The heat recovery heat exchanger 105 is connected to the domestic water tank 103, allowing for simultaneous heating in winter and hot water production, thereby improving energy efficiency.

[0136] Specifically, the difference between the embodiments shown in Figures 14 and 15 is that in the embodiment shown in Figure 15, there is an additional path through the eighth valve port 1181, the tenth valve port 1183, the first valve port 1061 and the second valve port 1062 to enter the third refrigerant port 203 of the air-conditioning side heat exchanger 20, which can better regulate the amount of refrigerant entering the heat recovery heat exchanger 105.

[0137] As shown in FIG. 16 , in pure hot water mode, the eighth valve port 1181 is connected to the ninth valve port 1182 , the fifth valve port 1171 is connected to the seventh valve port 1173 , and the third valve port 1063 is connected to the fourth valve port 1064 . That is, when only hot water needs to be prepared, the refrigerant output by the compressor 104 passes through the eighth valve port 1181 and the ninth valve port 1182 and enters the refrigerant inlet 1053 of the heat recovery heat exchanger 105. The refrigerant exchanges heat with the water in the domestic water tank 103 in the heat recovery heat exchanger 105, and becomes a medium-temperature gas after preparing hot water. The refrigerant output from the refrigerant outlet 1054 of the heat recovery heat exchanger 105 passes through the fifth valve port 1171 and the seventh valve port 1173 and enters the liquid storage container 110. The refrigerant output from the liquid storage container 110 passes through the refrigerant main path and the enthalpy increase auxiliary path respectively. The refrigerant in the enthalpy increase auxiliary path is throttled and cooled by the auxiliary throttling device 120, and then absorbs the refrigerant heat from the refrigerant main path in the economizer 119, and finally enters the enthalpy increase port 1041 of the compressor 104. After the refrigerant in the main refrigerant circuit is cooled by heat exchange, it is further throttled and cooled by the main throttling device 107 to become the refrigerant at a lower temperature. It then enters the second refrigerant port 1022 of the outdoor heat exchanger 102. After evaporating and absorbing heat in the outdoor heat exchanger 102, the refrigerant output from the first refrigerant port 1021 of the outdoor heat exchanger 102 passes through the third valve port 1063 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, thus repeating the cycle. The heat recovery heat exchanger 105 is connected to the domestic water tank 103, so that the heat from the compressor 104 can be used solely in the heat recovery heat exchanger 105 to exchange heat with the water in the domestic water tank 103. This makes targeted use of energy, shortens the refrigerant circuit when making hot water, and eliminates the need to pass through the air conditioning side heat exchanger 20, thereby improving heat exchange efficiency.

[0138] As shown in FIG. 17 , in the cooling mode, the eighth valve port 1181 is connected to the tenth valve port 1183 , the first valve port 1061 is connected to the third valve port 1063 , and the second valve port 1062 is connected to the fourth valve port 1064 . That is, when cooling alone is performed in summer, the high-temperature gas output by the compressor 104 passes through the first switch valve 108, the first valve port 1061 and the third valve port 1063 and enters the first refrigerant port 1021 of the outdoor heat exchanger 102. The high-temperature gas condenses and releases heat in the outdoor heat exchanger 102 and becomes a medium-temperature liquid. The medium-temperature liquid output from the second refrigerant port 1022 of the outdoor heat exchanger 102 passes through the refrigerant main circuit and the enthalpy increase auxiliary circuit respectively. The medium-temperature liquid in the enthalpy increase auxiliary circuit is throttled and cooled by the auxiliary throttling device 120 to become a low-temperature liquid. The low-temperature liquid absorbs the refrigerant heat from the refrigerant main circuit in the economizer 119 and becomes a relatively low-temperature gas, and finally enters the enthalpy increase port 1041 of the compressor 104. The medium-temperature liquid in the main refrigerant circuit is turned into a low-temperature liquid after its temperature is reduced by heat exchange, and is further throttled and cooled by the main throttling device 107 to become a low-temperature liquid with a lower temperature, and then enters the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20. The low-temperature liquid exchanges heat with the circulating water in the end in the air-conditioning side heat exchanger 20, and the low-temperature liquid absorbs the heat of the circulating water and evaporates to become a low-temperature gas. The low-temperature gas output from the third refrigerant port 203 of the air-conditioning side heat exchanger 20 passes through the second valve port 1062 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, and circulates back and forth.

[0139] As shown in FIG. 18 , in the heating mode, the eighth valve port 1181 is connected to the tenth valve port 1183 , the first valve port 1061 is connected to the second valve port 1062 , and the third valve port 1063 is connected to the fourth valve port 1064 . That is, when heating alone is used in winter, the high-temperature gas output by the compressor 104 passes through the first switch valve 108, the first valve port 1061 and the second valve port 1062 and enters the third refrigerant port 203 of the air-conditioning side heat exchanger 20. The high-temperature gas is converted into a medium-temperature liquid after heat exchange with the circulating water in the terminal in the air-conditioning side heat exchanger 20. The medium-temperature liquid output from the fourth refrigerant port 204 of the air-conditioning side heat exchanger 20 passes through the refrigerant main circuit and the enthalpy increase auxiliary circuit respectively. The medium-temperature liquid in the enthalpy increase auxiliary circuit is throttled and cooled by the auxiliary throttling device 120 to become a low-temperature liquid. The low-temperature liquid absorbs the refrigerant heat from the refrigerant main circuit in the economizer 119 and becomes a relatively low-temperature gas, and finally enters the enthalpy increase port 1041 of the compressor 104. The medium-temperature liquid in the main refrigerant circuit is turned into a low-temperature liquid after its temperature is reduced by heat exchange, and is further throttled and cooled by the main throttling device 107 to become a low-temperature liquid with a lower temperature, and then enters the second refrigerant port 1022 of the outdoor heat exchanger 102. The low-temperature liquid evaporates and absorbs heat in the outdoor heat exchanger 102 to become a low-temperature gas. The low-temperature gas output from the first refrigerant port 1021 of the outdoor heat exchanger 102 passes through the third valve port 1063 and the fourth valve port 1064 and then returns to the inlet of the compressor 104, repeating the cycle.

[0140] It should be noted that the terms "high," "medium," and "low" are relative terms, and "gas" can also refer to a gas-liquid two-phase state or a gaseous state, without limitation. Furthermore, the heat recovery heat exchanger 105 is not required during both cooling and heating processes; it only passes through it when recovering waste heat. If the hot water reaches a certain temperature, the heat from the compressor 104 can also directly reach the first reversing valve 106.

[0141] As shown in Figure 19, the sixth embodiment discloses an outdoor unit 10, including the content of the above-mentioned fifth embodiment, which will not be repeated here, but the difference compared with the fifth embodiment is that the air-conditioning side heat exchanger 20 is installed in the third installation area 1013 inside the shell 101.

[0142] As shown in Figure 20, the seventh embodiment discloses an outdoor unit 10, including the content of the above-mentioned fifth embodiment, which will not be repeated here, but the difference compared with the fifth embodiment is that the domestic water tank 103 is horizontally installed in the second installation area 1012 inside the shell 101.

[0143] As shown in Figure 21, the eighth embodiment discloses an outdoor unit 10, including the content of the above-mentioned sixth embodiment, which will not be repeated here, but the difference compared with the sixth embodiment is that the domestic water tank 103 is horizontally installed in the second installation area 1012 inside the shell 101.

[0144] A ninth embodiment discloses an air-to-energy heat pump system, which is a combined air-to-energy heat pump system, including an outdoor unit 10 as described in the first, third, fifth, or seventh embodiments, which are not described in detail herein. The system further includes: an air-conditioning-side heat exchanger 20 located outside the outdoor unit 10, as well as the air conditioner 30 and / or the floor heating device 40. Preferably, the air-conditioning-side heat exchanger 20 is located indoors.

[0145] The tenth embodiment discloses an air-to-energy heat pump system, which is a combined air-to-energy heat pump system with dual or trigeneration. The system includes the outdoor unit 10 described in the second, fourth, sixth, or eighth embodiments, which are not described in detail herein. The system further includes the air conditioner 30 and / or the floor heating device 40 located outside the outdoor unit 10.

[0146] By implementing this application, the following beneficial effects are achieved:

[0147] The present application integrates the domestic water tank 103 into the outdoor unit 10 and compacts the layout of various components in the outdoor unit 10, thereby making high use of the space of the outdoor unit 10, so that the outdoor unit 10 has high integration, small size, low maintenance cost, easy installation and less space limitation.

[0148] Moreover, the present application can prepare hot water while cooling, prepare hot water while heating, and prepare hot water purely, thereby achieving full utilization of heat and improving the flexibility, energy efficiency, and stability of the system in different modes.

[0149] It can be understood that the above embodiments only express some implementation methods of the present application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all fall within the scope of protection of the present application, 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 application should fall within the scope of coverage of the claims of the present application.

Claims

1. An outdoor unit, characterized in that: include: A housing, wherein the interior of the housing includes a first mounting area, a second mounting area, and a third mounting area, wherein the first mounting area is located on one side of the third mounting area, and the second mounting area is located on the same side of the first mounting area and the third mounting area; An outdoor heat exchanger, wherein the outdoor heat exchanger is installed in the first installation area; A domestic water tank, the domestic water tank being installed in the second installation area; A compressor, a heat recovery heat exchanger, a first reversing valve and a main throttling device, wherein the compressor, the heat recovery heat exchanger, the first reversing valve and the main throttling device are installed in the third installation area.

2. The outdoor unit according to claim 1, characterized in that: The domestic water tank is installed horizontally or vertically in the second installation area.

3. The outdoor unit according to claim 1, characterized in that: The shell further includes a fourth installation area, and the fourth installation area is close to the first installation area; The outdoor unit further comprises: An electric control board assembly is installed in the fourth installation area and is used to control various electric control components in the shell.

4. The outdoor unit according to claim 1, characterized in that: The heat recovery heat exchanger is a shell-and-tube heat exchanger, which includes a cold water inlet, a hot water outlet connected to the cold water inlet, a refrigerant inlet, and a refrigerant outlet connected to the refrigerant inlet; The first reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port; The outdoor heat exchanger includes a first refrigerant port and a second refrigerant port connected to the first refrigerant port; Wherein, the cold water inlet and the hot water outlet are connected to the domestic water tank to form a water circuit for heat energy storage, and the water circuit for heat energy storage is used to store at least part of the heat of the refrigerant in the domestic water tank when the compressor is running; The outlet of the compressor is connected to the refrigerant inlet, and the refrigerant outlet is connected to the first valve port; the inlet of the compressor is connected to the fourth valve port; The third valve port is connected to the first refrigerant port; one path of the second refrigerant port is connected to the inlet of the main throttling device, and the other path is connected to the outlet of the main throttling device; The second valve port is connected to the third refrigerant port of the external air-conditioning side heat exchanger through a refrigerant pipeline, and the inlet and outlet of the main throttling device are connected to the fourth refrigerant port of the external air-conditioning side heat exchanger through a refrigerant pipeline.

5. The outdoor unit according to claim 4, characterized in that: The outdoor unit further comprises: A bypass pipeline is installed in the third installation area and communicates with the outlet of the compressor and the first valve port.

6. The outdoor unit according to claim 5, characterized in that: The outdoor unit further comprises: A first switch valve and / or a second switch valve are installed in the third installation area, wherein the first switch valve is arranged on the bypass pipeline, and the second switch valve is arranged on the refrigerant pipeline connecting the outlet of the compressor and the refrigerant inlet.

7. The outdoor unit according to claim 4, characterized in that: The outdoor unit further comprises: A liquid storage container for storing liquid refrigerant, wherein the liquid storage container is installed at the inlet end of the main throttling device in the third installation area.

8. The outdoor unit according to claim 4, characterized in that: The outdoor unit further comprises: A filter for filtering impurities, wherein the filter is installed at the inlet end of the main throttling device in the third installation area.

9. The outdoor unit according to claim 4, characterized in that: The outdoor unit further comprises: a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve installed in the third installation area; The first one-way valve is arranged on a refrigerant pipeline connecting the second refrigerant port and the inlet of the main throttling device, and the refrigerant flows from the second refrigerant port to the inlet of the main throttling device; The second one-way valve is arranged on the refrigerant pipeline connecting the outlet of the main throttling device and the fourth refrigerant port, and the refrigerant flows from the outlet of the main throttling device to the fourth refrigerant port; The third one-way valve is arranged on the refrigerant pipeline connecting the fourth refrigerant port and the inlet of the main throttling device, and the refrigerant flows from the fourth refrigerant port to the inlet of the main throttling device; The fourth one-way valve is arranged on the refrigerant pipeline connecting the outlet of the main throttling device and the second refrigerant port, and the refrigerant flows from the outlet of the main throttling device to the second refrigerant port.

10. The outdoor unit according to claim 4, characterized in that: The outdoor unit further comprises: A second reversing valve is installed in the third installation area, and the second reversing valve includes a fifth valve port, a sixth valve port and a seventh valve port. The fifth valve port is connected to the refrigerant outlet, the sixth valve port is connected to the first valve port, and the seventh valve port is connected to the inlet of the main throttling device.

11. The outdoor unit according to claim 10, characterized in that: The fifth valve port is in communication with the sixth valve port or the fifth valve port is in communication with the seventh valve port; When the fifth valve port is connected to the sixth valve port, the refrigerant passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the sixth valve port, the first valve port, the third valve port and the outdoor heat exchanger 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 stored in the domestic water tank through the water circuit for heat energy storage; Alternatively, when the fifth valve port is connected to the sixth valve port, the refrigerant, after coming out of the compressor, passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the sixth valve port, the first valve port, the fourth valve port and the air-conditioning side heat exchanger to form a heating refrigerant circuit, and at the same time, at least part of the heat of the refrigerant is stored in the domestic water tank through the water circuit for heat energy storage; When the fifth valve port is connected to the seventh valve port, the refrigerant comes out of the compressor and passes through the refrigerant inlet, the refrigerant outlet, the fifth valve port, the seventh valve port, the main throttling device and the outdoor heat exchanger to form a refrigerant circuit of pure hot water.

12. The outdoor unit according to claim 10, characterized in that: The outdoor unit further comprises: A third reversing valve is installed in the third installation area, and the third reversing valve includes an eighth valve port, a ninth valve port and a tenth valve port, the eighth valve port is connected to the outlet of the compressor, the ninth valve port is connected to the refrigerant inlet, and the tenth valve port is connected to the first valve port.

13. The outdoor unit according to claim 12, characterized in that: The first reversing valve is a four-way valve, and the second reversing valve and the third reversing valve are three-way valves.

14. The outdoor unit according to claim 4, characterized in that: The outdoor unit further comprises: an economizer and an auxiliary throttling device installed in the third installation area, the economizer comprising a main refrigerant inlet, an auxiliary refrigerant inlet, a main refrigerant outlet and an auxiliary refrigerant outlet; The main refrigerant inlet, the main refrigerant outlet and the main throttling device connected in sequence are the main refrigerant circuit, and the auxiliary throttling device, the auxiliary refrigerant inlet and the auxiliary refrigerant outlet connected in sequence are the auxiliary refrigerant circuit; The second refrigerant port is connected to the fourth refrigerant port through the refrigerant main path on one side and connected to the enthalpy increase port of the compressor through the refrigerant auxiliary path on the other side; The fourth refrigerant port is connected to the second refrigerant port via the refrigerant main path on one side, and is connected to the enthalpy increase port of the compressor via the refrigerant auxiliary path on the other side.

15. The outdoor unit according to claim 1, characterized in that: The outdoor unit further comprises: An air-conditioning side heat exchanger is installed in the third installation area.

16. An air energy heat pump system, characterized in that: Comprising the outdoor unit described in any one of claims 1-15.

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