Outdoor unit and triple co-generation system

Abstract

The utility model discloses an outdoor unit and a triple co-generation system. The outdoor unit comprises a shell, an outdoor side heat exchanger, a domestic water tank, a compressor, a hot water side heat exchanger, a first water pump, an air conditioner side heat exchanger and a second water pump. A first cavity and a second cavity are formed in the shell, the second cavity is L-shaped and surrounds the outer side of the first cavity, the second cavity comprises a transverse space and a vertical space perpendicular to the transverse space, and the transverse space partially extends to the position below the first cavity. The outdoor side heat exchanger is installed in the first cavity, the domestic water tank is vertically installed in the vertical space of the second cavity, and the compressor, the hot water side heat exchanger, the first water pump, the air conditioner side heat exchanger and the second water pump are installed in the transverse space of the second cavity. The integration level of the unit is improved, the space layout is reasonable, miniaturization and weight balance are achieved, the stability of the unit is improved, operation noise and vibration are reduced, and meanwhile the air volume and the heat exchange efficiency of the outdoor heat exchanger cannot be affected.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to an outdoor unit and a trigeneration system. Background Art

[0002] In the related art, heat pumps are usually used to prepare hot water, and a domestic water tank is arranged horizontally in the outdoor unit to store a large amount of hot water, and other components are arranged on the upper part of the domestic water tank. This layout has the following problems: 1) Components that are prone to vibration are located on the upper part of the domestic water tank, which causes the overall vibration and high vibration noise; 2) The lateral area of ​​the outdoor unit is too large, which is not conducive to promotion. Utility Model Content

[0003] Based on this, it is necessary to provide an outdoor unit and a trigeneration system to address the above technical issues.

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

[0005] A shell, wherein the shell has a first cavity and a second cavity inside, the second cavity is "L"-shaped and is arranged outside the first cavity, the second cavity includes a lateral space and a vertical space perpendicular to the lateral space, and the lateral space partially extends to below the first cavity;

[0006] An outdoor heat exchanger, the outdoor heat exchanger is used to achieve heat exchange between the refrigerant and the outside air, and the outdoor heat exchanger is installed in the first cavity;

[0007] A domestic water tank, the domestic water tank is used to store domestic water, and the domestic water tank is vertically installed in the vertical space of the second cavity;

[0008] A compressor, a hot water side heat exchanger, a first water pump, an air conditioning side heat exchanger and a second water pump, wherein the compressor is used to provide refrigerant for the outdoor side heat exchanger, the hot water side heat exchanger and the air conditioning side heat exchanger, the hot water side heat exchanger is used to prepare hot water by heat exchange between the refrigerant and the water in the domestic water tank, the first water pump is used to provide power for the water circulation between the domestic water tank and the hot water side heat exchanger, the air conditioning side heat exchanger is used to realize heat exchange between the refrigerant and the water in the external terminal device, the second water pump is used to provide power for the water circulation between the air conditioning side heat exchanger and the external terminal device, and the compressor, the hot water side heat exchanger, the first water pump, the air conditioning side heat exchanger and the second water pump are installed in the lateral space of the second cavity.

[0009] In one embodiment, the hot water side heat exchanger and the first water pump are located below the corresponding domestic water tank.

[0010] In one embodiment, the housing includes a bottom plate located in the lateral space, and the outdoor unit further includes:

[0011] A water tank bracket, wherein the water tank bracket is fixed to the base plate, the domestic water tank is installed on the water tank bracket to form a first accommodating space between the bottom of the domestic water tank and the base plate, and the hot water side heat exchanger and the first water pump are located in the first accommodating space.

[0012] In one embodiment, the compressor, the air-conditioning side heat exchanger and the second water pump are located below the outdoor side heat exchanger.

[0013] In one embodiment, the housing further comprises:

[0014] A water receiving pan is used to collect condensed water. The water receiving pan is laterally arranged at the bottom of the outdoor heat exchanger. A second accommodating space is formed between the bottom of the water receiving pan and the bottom plate. The compressor, the air-conditioning side heat exchanger and the second water pump are located in the second accommodating space.

[0015] In one embodiment, the first accommodating space and the second accommodating space constitute a lateral space of the second cavity.

[0016] In one embodiment, the outdoor unit further comprises:

[0017] A pressure buffer is used to adjust the water pressure between the air-conditioning side heat exchanger and the external terminal device, and the pressure buffer is installed in the lateral space of the second cavity.

[0018] In one of the embodiments, the shell includes a bottom plate located in the lateral space, and the domestic water tank extends to the lateral space and is fixedly connected to the bottom plate.

[0019] In one embodiment, the outdoor unit further comprises:

[0020] A liquid storage container, the liquid storage container is used to store liquid refrigerant, and the liquid storage container is installed in the lateral space of the second cavity.

[0021] The utility model also constructs a trigeneration system, comprising any of the outdoor units described above.

[0022] By implementing the utility model, the following beneficial effects are achieved:

[0023] The utility model constructs the first cavity and the "L"-shaped second cavity inside the outdoor unit, the outdoor heat exchanger is installed in the first cavity, the domestic water tank is vertically installed in the vertical space of the second cavity, and the compressor, the hot water side heat exchanger, the first water pump, the air-conditioning side heat exchanger and the second water pump are installed in the lateral space of the second cavity, thereby improving the integration of the unit, reasonable spatial layout, improved space utilization, achieving miniaturization and weight balance, helping to improve the stability of the unit, reducing operating noise and vibration, and fully utilizing the lower space of the domestic water tank and the outdoor heat exchanger, without occupying the space of the outdoor heat exchanger or the domestic water tank, and will not affect the air volume and heat exchange efficiency of the outdoor heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1 It is a schematic diagram of the overall structure of the outdoor unit of the utility model;

[0026] Figure 2 Schematic diagram of the positions of the first space area, the second space area and the third space area inside the shell of the outdoor unit of the utility model, wherein the dotted line is a virtual boundary line, and the first space area is connected to the third space area;

[0027] Figure 3 It is a front view schematic diagram of the structure of the outdoor unit of the utility model;

[0028] Figure 4 It is a back schematic diagram of the structure of the outdoor unit of the utility model;

[0029] Figure 5 It is a schematic diagram of the trigeneration system of the utility model;

[0030] Figure 6 It is a schematic diagram of the refrigerant flow direction of the trigeneration system of the utility model in which hot water is prepared through a full heat recovery mode while refrigerating;

[0031] Figure 7 It is a schematic diagram of the flow direction of the first refrigerant in the trigeneration system of the utility model for preparing hot water through the waste heat recovery mode while refrigerating;

[0032] Figure 8 It is a schematic diagram of the flow direction of the second refrigerant in the trigeneration system of the utility model for preparing hot water through the waste heat recovery mode while cooling;

[0033] Fig. 9This is a schematic diagram of the flow direction of the first refrigerant in the trigeneration system of the utility model for preparing hot water while heating;

[0034] Fig.10 It is a schematic diagram of the flow direction of the second refrigerant in the trigeneration system of the utility model for preparing hot water while heating;

[0035] Fig.11 It is a schematic diagram of the refrigerant flow direction of the trigeneration system of the utility model when preparing hot water purely;

[0036] Fig.12 It is a schematic diagram of the refrigerant flow direction of the trigeneration system of the utility model in the cooling mode;

[0037] Fig.13 It is a schematic diagram of the refrigerant flow direction of the trigeneration system of the utility model in the heating mode. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] It should be noted that the height direction Z of the shell 10 is the vertical direction, and the length direction Y of the shell 10 is the horizontal direction.

[0043] like Figures 1 to 4 As shown, an embodiment of the utility model discloses an outdoor unit, including a housing 10, an outdoor side heat exchanger 11, a domestic water tank 12, a compressor 13, a hot water side heat exchanger 14, a first water pump 15, an air conditioning side heat exchanger 16 and a second water pump 17, specifically as follows:

[0044] like Figure 2 As shown, the housing 10 has a first cavity 101 and a second cavity 102 inside, the second cavity 102 is "L"-shaped and is arranged outside the first cavity 101, the second cavity 102 includes a lateral space 1021 and a vertical space 1022 perpendicular to the lateral space 1021, and the lateral space 1021 partially extends to the bottom of the first cavity 101. The lateral space 1021 and the vertical space 1022 may be separated by a structure such as a partition, or may not be separated by a structure such as a partition.

[0045] like Figure 5 As shown, the outdoor heat exchanger 11 includes a first refrigerant port 111 and a second refrigerant port 112 connected to the first refrigerant port 111. The outdoor heat exchanger 11 is used to achieve heat exchange between the refrigerant and the outside air. Figure 3 As shown, the outdoor heat exchanger 11 is installed in the first cavity 101 .

[0046] like Figure 5 As shown, the domestic water tank 12 includes a cold water inlet 121, a water outlet 122, a return water outlet 123 and a hot water outlet 124. The domestic water tank 12 is used to store domestic water. Figure 3 As shown, the domestic water tank 12 is vertically installed in the vertical space 1022 of the second cavity 102 .

[0047] like Figure 5As shown, the compressor 13 includes an inlet 131 and an outlet 132, and the compressor 13 is used to provide refrigerant for the outdoor side heat exchanger 11, the hot water side heat exchanger 14 and the air conditioning side heat exchanger 16. The hot water side heat exchanger 14 includes a refrigerant inlet 141, a refrigerant outlet 142 connected to the refrigerant inlet 141, a first water inlet 143 and a first water outlet 144 connected to the first water inlet 143. The hot water side heat exchanger 14 is used to prepare hot water by heat exchange between the refrigerant and the water in the domestic water tank 12. The first water pump 15 is used to provide power for the water circulation between the domestic water tank 12 and the hot water side heat exchanger 14, and the first water pump 15 is arranged in the water inlet pipe or the water outlet pipe of the hot water side heat exchanger 14. The air-conditioning side heat exchanger 16 includes a third refrigerant port 161, a fourth refrigerant port 162 connected to the third refrigerant port 161, a second water inlet 163, and a second water outlet 164 connected to the second water inlet 163. The air-conditioning side heat exchanger 16 is used to achieve heat exchange between the refrigerant and the water in the external terminal device 29. The second water pump 17 is used to provide power for the water circulation between the air-conditioning side heat exchanger 16 and the external terminal device 29. The second water pump 17 is arranged on the water inlet pipe or the water outlet pipe of the air-conditioning side heat exchanger 16. Figure 3 As shown, the compressor 13 , the hot water side heat exchanger 14 , the first water pump 15 , the air conditioning side heat exchanger 16 and the second water pump 17 are installed in the lateral space 1021 of the second cavity 102 .

[0048] This embodiment improves the integration of the unit, has a reasonable spatial layout, improves space utilization, achieves miniaturization, and balances weight, which helps to improve the stability of the unit and reduce operating noise and vibration. It also makes full use of the lower space of the domestic water tank 12 and the outdoor heat exchanger 11, does not occupy the space of the outdoor heat exchanger 11 or the domestic water tank 12, and does not affect the air volume and heat exchange efficiency of the outdoor heat exchanger 11.

[0049] It is also convenient for the design and arrangement of pipelines, which is beneficial to reducing the pipelines between the hot water side heat exchanger 14 and the domestic water tank 12, and avoiding the loss of heat and pipeline pressure during hot water transportation caused by excessively long pipelines.

[0050] Since the domestic water tank 12 is vertically installed in the vertical space 1022 vertically installed in the second cavity 102, and the outdoor heat exchanger 11 is installed in the first cavity 101, the water tank side does not need air intake, so that the water tank side can be installed against the wall to be applied to the installation space with poor ventilation environment, and the gaps left at both ends during the original installation are changed to a single-side gap, which has wide adaptability to the installation space, can save installation space, and reduce the size of the outdoor unit. At the same time, since the outdoor heat exchanger 11 is set separately, it can also ensure that there is enough ventilation on the heat exchanger side to ensure heat exchange efficiency, and avoid the heat exchange efficiency of the outdoor heat exchanger 11 from decreasing due to insufficient ventilation space.

[0051] Since the density of hot water is lower than that of cold water, compared with installing the domestic water tank 12 horizontally, installing the domestic water tank 12 vertically is conducive to allowing the prepared hot water to quickly rise to the top of the domestic water tank 12, so that the hot water outlet 124 at the top can quickly obtain high-temperature hot water, thereby improving the water discharge volume, water discharge rate and hot water supply capacity. In some embodiments, the domestic water tank 12 is a metal tank body, such as a stainless steel cylindrical tank body. The outer wall surface of the domestic water tank 12 is wrapped with an insulation layer, such as insulation cotton or polyurethane foam, and the heat loss of the prepared hot water is prevented by wrapping the insulation layer. The stainless steel cylindrical tank body, the insulation cotton and the polyurethane foam here are only examples and are not intended to be a limitation of the present application.

[0052] In some embodiments, Figure 2 As shown, the first cavity 101 is rectangular, and the rectangle here is only an example and is not intended to limit the present application.

[0053] In some embodiments, an electric auxiliary heater, such as an electric heating rod, is provided in the domestic water tank 12. In order to monitor the temperature in the domestic water tank 12 in real time, a temperature detector, such as a thermometer, is provided in the domestic water tank 12. The electric heating rod and the thermometer are merely examples and are not intended to limit the present application.

[0054] When water is heated, scale will be produced, and the scale will cause corrosion to the domestic water tank 12. A water softening device and / or an anti-corrosion layer is provided in the domestic water tank 12. For example, the water softening device is a magnesium rod, and the anti-corrosion layer is a metal coating. After the magnesium rod is placed in the domestic water tank 12, the magnesium rod will release magnesium ions, so that the water alkali and scale in the domestic water tank 12 are reduced, effectively preventing a large amount of scale from being attached to the inner wall of the domestic water tank 12, thereby avoiding corrosion to the domestic water tank 12.

[0055] In some embodiments, a pressure relief device is provided on the top of the domestic water tank 12, and the pressure relief device is used to release the pressure inside the domestic water tank 12. For example, the pressure relief device is an exhaust valve, and the exhaust valve here is only an example and is not intended to limit the present application.

[0056] In some embodiments, Figure 3 As shown, the hot water side heat exchanger 14 and the first water pump 15 are located in the horizontal space 1021 corresponding to the vertical space 1022 , that is, below the domestic water tank 12 .

[0057] Specifically, the housing 10 includes a bottom plate 1033 located in the lateral space 1021, and the bottom plate 1033 is used to be fixed on an external fixture, such as the ground. The outdoor unit also includes a water tank bracket 30, and the water tank bracket 30 is fixed on the bottom plate 1033. The domestic water tank 12 is installed on the water tank bracket 30 so that a first accommodation space is formed between the bottom of the domestic water tank 12 and the bottom plate 1033, and the hot water side heat exchanger 14 and the first water pump 15 are located in the first accommodation space.

[0058] In some embodiments, the domestic water tank 12 extends to the lateral space 1021 and is fixedly connected to the bottom plate 1033 .

[0059] In some embodiments, Figure 3 and Figure 4 As shown, the compressor 13 , the air-conditioning side heat exchanger 16 and the second water pump 17 are located in the lateral space 1021 corresponding to the first cavity 101 , that is, below the outdoor side heat exchanger 11 .

[0060] Specifically, the shell also includes a water receiving tray 105, which is used to collect condensed water. The water receiving tray 105 is horizontally arranged at the bottom of the outdoor heat exchanger 11. A second accommodating space is formed between the bottom of the water receiving tray 105 and the bottom plate 1033. The compressor 13, the air-conditioning side heat exchanger 16 and the second water pump 17 are located in the second accommodating space.

[0061] Furthermore, the first accommodating space and the second accommodating space constitute a lateral space 1021 of the second cavity 102 .

[0062] In some embodiments, the shell further includes an outer shell 103 and a partition 104, wherein the partition 104 is vertically arranged between the domestic water tank 12 and the outdoor heat exchanger 11, and is respectively connected to the outer shell 103 and the water receiving tray 105 to define the first cavity 101 and the second cavity 102.

[0063] In some embodiments, in order to reduce the number of pipes between the hot water side heat exchanger 14 and the domestic water tank 12 , the water outlet 122 is located at the bottom of the domestic water tank 12 , and the water return port 123 is located in the middle of the domestic water tank 12 .

[0064] In some embodiments, the water outlet 122 is connected to the first water inlet 143, the first water outlet 144 is connected to the water return port 123, there is a space between the domestic water tank 12 and the corner inside the housing 103, and the pipe connecting the first water outlet 144 to the water return port 123 is located in the space to make full use of the space in the corner. For example, the domestic water tank 12 is cylindrical, and the cylindrical shape here is only an example and is not intended to limit the present application.

[0065] In some embodiments, Figure 2 As shown, the vertical space 1022 and the first cavity 101 are arranged in a stepped manner inside the shell 10 to form a first space and a second space with different vertical lengths in the lateral space 1021, wherein the first space corresponds to the first cavity 101 (that is, the first space is located below the outdoor heat exchanger 11), the second space corresponds to the vertical space 1022 (that is, the second space is located below the domestic water tank 12), and the vertical length of the first space is greater than the vertical length of the second space.

[0066] In this embodiment, system components with different height requirements can be placed in the first space and the second space, so that the internal space layout of the outdoor unit is reasonable, and the problem of insufficient internal space of the outdoor unit when the domestic water tank 12 is built into the outdoor unit is solved, thereby improving space utilization and achieving miniaturization. It should be noted that the vertical space 1022 and the first cavity 101 are arranged in a stepped manner inside the shell 10, which means that they are arranged in a stepped manner in the height direction Z of the shell 10.

[0067] Specifically, Figure 3 As shown, the height of the domestic water tank 12 is greater than the height of the outdoor heat exchanger 11, and the lowest point of the domestic water tank 12 is lower than the lowest point of the outdoor heat exchanger 11, thereby making full use of the internal space of the outdoor unit to increase the height of the domestic water tank 12 and increase the water volume.

[0068] In some embodiments, Figure 3 As shown, the outdoor unit further includes a first heat exchanger bracket 31 , the first heat exchanger bracket 31 is fixed on the bottom plate 1033 , and the hot water side heat exchanger 14 is installed on the first heat exchanger bracket 31 .

[0069] For example, the hot water side heat exchanger 14 is a shell-and-tube heat exchanger, which extends around the height direction Z of the housing 10 and is arranged around the periphery of the first water pump 15 to fully utilize the peripheral space of the first water pump 15. The pipes inside the shell-and-tube heat exchanger can carry two heat exchange media, refrigerant and water, which are separated by copper pipes and heat exchanged, thereby providing hot water for the domestic water tank 12. The shell-and-tube heat exchanger here is only an example and is not intended to limit the present application.

[0070] In some embodiments, the outdoor unit further includes a first water pump bracket (not shown), and the first water pump 15 is installed in the lateral space 1021 of the second cavity 102 through the first water pump bracket. For example, the first water pump bracket can be a hard pipe at the inlet and outlet ends of the first water pump 15, and the hard pipe plays a supporting role. The first water pump bracket can also be fixed to a bracket on the bottom plate 1033, and the first water pump 15 is installed on the first water pump bracket.

[0071] In some embodiments, Figure 3 As shown, the outdoor unit further includes a second heat exchanger bracket 32 ​​, which is fixed on the base plate 1033 , and the air-conditioning side heat exchanger 16 is installed (eg vertically installed) on the second heat exchanger bracket 32 ​​.

[0072] For example, the air-conditioning side heat exchanger 16 is a plate heat exchanger, and the external terminal device 29 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 16 and the air disk and / or floor heating. The plate heat exchanger, the air disk, the floor heating and the hydraulic module here are only examples and are not intended to limit the present application.

[0073] In some embodiments, the outdoor unit further includes a second water pump bracket (not shown), and the second water pump 17 is installed in the lateral space 1021 of the second cavity 102 through the second water pump bracket. For example, the second water pump bracket can be a hard pipe at the inlet and outlet ends of the second water pump 17, and the hard pipe plays a supporting role. The second water pump bracket can also be fixed to a bracket on the bottom plate 1033, and the second water pump 17 is installed on the second water pump bracket.

[0074] In some embodiments, Figure 4As shown, the outdoor unit further includes a pressure buffer 33, and the pressure buffer 33 is used to adjust the water pressure between the air-conditioning side heat exchanger 16 and the external terminal device 29. The pressure buffer 33 is installed in the lateral space 1021 of the second cavity 102, specifically at the lateral space 1021 corresponding to the first cavity 101, that is, below the outdoor side heat exchanger 11. For example, the pressure buffer 33 is an expansion tank, and the expansion tank here is only an example and is not intended to limit the present application.

[0075] Specifically, the second water pump 17 and the pressure buffer 33 are stacked in the height direction Z of the housing 103, and the second water pump 17 and the pressure buffer 33 are located at one end of the inner width direction X of the housing 10, and the air-conditioning side heat exchanger 16 is located at the other end of the inner width direction X of the housing 10. For example, the pressure buffer 33 is installed (such as horizontally installed) on the bottom plate 1033, and the second water pump 17 is located above the pressure buffer 33. It should be noted that the horizontal installation is to extend along the length and width plane of the housing 10.

[0076] In some embodiments, the compressor 13 is located at the lateral space 1021 corresponding to the first cavity 101, that is, below the outdoor heat exchanger 11. Specifically, the outdoor unit further includes a compressor bracket (not shown), the compressor bracket is fixed to the bottom plate 1033, and the compressor 13 is installed (for example, vertically installed) on the compressor bracket.

[0077] In some embodiments, Figure 3 As shown, the shell 10 includes an outer shell 103, a partition 104 and a water receiving tray 105. The water receiving tray 105 is laterally arranged at the bottom of the outdoor heat exchanger 11 and connected to the outer shell 103. The partition 104 is vertically arranged between the domestic water tank 12 and the outdoor heat exchanger 11, and is respectively connected to the outer shell 103 and the water receiving tray 105 to define the first cavity 101 and the second cavity 102.

[0078] In some embodiments, Figure 3 As shown, the outdoor unit further includes a fan 18, which is used to drive the external air to exchange heat with the outdoor heat exchanger 11, and the fan 18 is installed in the first cavity 101. For example, the outdoor heat exchanger 11 is a finned heat exchanger, which is only an example and is not intended to limit the present application.

[0079] Accordingly, if Figure 1 and Figure 4As shown, the first surface of the shell 103 corresponding to the first cavity 101 is provided with an air inlet 1031, and the second surface is provided with an air outlet 1032. For example, the side of the shell 103 is provided with the air inlet 1031, and the front is provided with the air outlet 1032. The side and the front here are only examples and are not intended to limit the present application. It can be any two of the front, the side and the back.

[0080] In some embodiments, Figure 3 As shown, the water receiving tray 105 is provided with a heat dissipation hole 1051, and the heat dissipation hole 1051 connects the first cavity 101 and the second cavity 102. When the fan 18 is started, the first cavity 101 is negative pressure, and the hot air generated by the components in the second cavity 102 can be discharged to the outside.

[0081] In some embodiments, Figure 5 As shown, the outdoor unit further includes a first reversing valve 19, which includes a first valve port 191, a second valve port 192, a third valve port 193 and a fourth valve port 194. The first reversing valve 19 is used to switch between the cooling mode and the heating mode. Figure 4 As shown, the first reversing valve 19 is installed in the lateral space 1021 of the second cavity 102, specifically, at the lateral space 1021 corresponding to the first cavity 101, that is, below the outdoor heat exchanger 11. For example, the first reversing valve 19 is a four-way valve, and the four-way valve here is only an example and is not intended to limit the present application.

[0082] In some embodiments, Figure 4 As shown, the outdoor unit also includes a first one-way valve 20 and a first throttling device 21, and the first one-way valve 20 and the first throttling device 21 are used for throttling and cooling the refrigerant in the cooling mode. The first one-way valve 20 and the first throttling device 21 are installed in the lateral space 1021 of the second cavity 102, specifically at the lateral space 1021 corresponding to the first cavity 101, that is, below the outdoor heat exchanger 11.

[0083] The outdoor unit also includes a second one-way valve 22 and a second throttling device 23, which are used for throttling and cooling the refrigerant in the heating mode. The second one-way valve 22 and the second throttling device 23 are installed in the transverse space 1021 of the second cavity 102, specifically at the transverse space 1021 corresponding to the first cavity 101, that is, below the outdoor heat exchanger 11.

[0084] For example, the first throttling device 21 and the second throttling device 23 are electronic expansion valves or thermal expansion valves. The electronic expansion valves and thermal expansion valves mentioned here are only examples and are not intended to limit the present application.

[0085] In some embodiments, Figure 5 As shown, the outdoor unit further includes a liquid storage container 24, which includes a first interface 241, a second interface 242 and a third interface 243. The liquid storage container 24 is used to store liquid refrigerant. Figure 3 As shown, the liquid storage container 24 is installed in the lateral space 1021 of the second cavity 102, specifically, in the lateral space 1021 corresponding to the first cavity 101, that is, below the outdoor heat exchanger 11. Specifically, the liquid storage container 24 is installed (for example, vertically installed) on the bottom plate 1033.

[0086] In some embodiments, Figure 5 As shown, the outdoor unit further includes a second reversing valve 25, which includes a fifth valve port 251, a sixth valve port 252 and a seventh valve port 253. The second reversing valve 25 is used to switch all or at least part of the heat of the refrigerant to be exchanged in the hot water side heat exchanger 14. Figure 3 As shown, the second reversing valve 25 is installed in the transverse space 1021 of the second cavity 102 , specifically, at the transverse space 1021 corresponding to the first cavity 101 , that is, below the outdoor heat exchanger 11 .

[0087] The outdoor unit also includes a third reversing valve 26, which includes an eighth valve port 261, a ninth valve port 262 and a tenth valve port 263. The third reversing valve 26 is used to regulate the amount of refrigerant entering the hot water side heat exchanger 14. The third reversing valve 26 is installed in the transverse space 1021 of the second cavity 102, specifically at the transverse space 1021 corresponding to the first cavity 101, that is, below the outdoor side heat exchanger 11.

[0088] For example, the second reversing valve 25 and the third reversing valve 26 are three-way valves, and the three-way valves here are only examples and are not intended to limit the present application.

[0089] In some embodiments, Figure 3 As shown, the outdoor unit further includes a gas-liquid separator 27, which is used to separate gaseous refrigerant and liquid refrigerant, and is installed in the lateral space 1021 of the second cavity 102, specifically, at the lateral space 1021 corresponding to the first cavity 101, that is, below the outdoor heat exchanger 11. Specifically, the gas-liquid separator 27 is installed (for example, vertically installed) on the bottom plate 1033.

[0090] In some embodiments, Figure 3 As shown, the outdoor unit further includes a control box 28, which is used to control the various electronic control components in the housing 103, such as the compressor 13, the first water pump 15, the fan 18, the second water pump 17, the first reversing valve 19, the first throttling device 21, the second throttling device 23, the second reversing valve 25 and the third reversing valve 26. The control box 28 is installed in the lateral space 1021 of the second cavity 102, specifically, at the lateral space 1021 corresponding to the first cavity 101, that is, below the outdoor heat exchanger 11. Specifically, the control box 28 is installed (for example, vertically installed) on the bottom plate 1033.

[0091] Furthermore, the main control board of the control box 28 is provided with a heat sink 281, and the heat sink 281 corresponds to the heat dissipation hole 1051. For example, the heat sink 281 is a heat dissipation fin, which is only an example and is not intended to limit the present application.

[0092] In some embodiments, Figure 3 As shown, the main vibrating parts such as the compressor 13, the hot water side heat exchanger 14, the first water pump 15, the air conditioning side heat exchanger 16, the second water pump 17, the liquid storage container 24, the gas-liquid separator 27, the control box 28 and the pressure buffer 33 are fixed on the base plate 1033, so that the outdoor unit has a low center of gravity and balanced weight, thereby improving the stability of the unit and reducing vibration and noise.

[0093] Through the above structural layout, the compressor 13, the hot water side heat exchanger 14, the first water pump 15, the air conditioning side heat exchanger 16, the second water pump 17, the first reversing valve 19, the first non-return valve 20, the first throttling device 21, the second non-return valve 22, the second throttling device 23, the liquid storage container 24, the second reversing valve 25, the third reversing valve 26, the gas-liquid separator 27, the control box 28 and the pressure buffer 33 are located in the space below the domestic water tank 12 and the outdoor heat exchanger 11, and do not occupy the space of the outdoor heat exchanger 11 or the domestic water tank 12. The space layout is reasonable, and the air volume and heat exchange efficiency of the outdoor heat exchanger 11 are not affected, the space utilization rate is improved, and the integration of the outdoor unit is improved, the miniaturization of the product is realized, and heating, cooling and preparation of domestic hot water can be completed without additional equipment such as hydraulic modules and domestic hot water modules, which reduces the complexity of installing multiple devices during the engineering installation process and improves the user experience.

[0094] like Figure 5As shown, the connection relationship between the above-mentioned components is as follows: the outlet 132 of the compressor 13 is connected to the eighth valve port 261 of the third reversing valve 26, the ninth valve port 262 of the third reversing valve 26 is connected to the refrigerant inlet 141 of the hot water side heat exchanger 14, and the tenth valve port 263 of the third reversing valve 26 is connected to the first valve port 191 of the first reversing valve 19; the refrigerant outlet 142 of the hot water side heat exchanger 14 is connected to the fifth valve port 251 of the second reversing valve 25, and the sixth valve port 252 of the second reversing valve 25 is connected to the first valve port 191 of the first reversing valve 19 , the seventh valve port 253 of the second reversing valve 25 is connected to the first interface 241 of the liquid storage container 24; the water outlet 122 of the domestic water tank 12 is connected to the first water inlet 143 of the hot water side heat exchanger 14 through the first water pump 15, and the first water outlet 144 of the hot water side heat exchanger 14 is connected to the return water port 123 of the domestic water tank 12; the second valve port 192 of the first reversing valve 19 is connected to the first refrigerant port 111 of the outdoor heat exchanger 11; the second refrigerant port 112 of the outdoor heat exchanger 11 is connected to the liquid storage container through the first one-way valve 20. The second refrigerant port 112 of the outdoor heat exchanger 11 is connected to the second interface 242 of the liquid storage container 24, the conducting direction of the first one-way valve 20 is toward the second interface 242 end of the liquid storage container 24, the second refrigerant port 112 of the outdoor heat exchanger 11 is connected to the second interface 242 of the liquid storage container 24 through the second throttling device 23; the third refrigerant port 161 of the air-conditioning side heat exchanger 16 is connected to the third interface 243 of the liquid storage container 24 through the first throttling device 21, and the third refrigerant port 161 of the air-conditioning side heat exchanger 16 is connected to the third interface 243 of the liquid storage container 24 through the second one-way valve 22. 43 is connected, the conduction direction of the second one-way valve 22 is toward the third interface 243 end of the liquid storage container 24; the fourth refrigerant port 162 of the air-conditioning side heat exchanger 16 is connected to the fourth valve port 194 of the first reversing valve 19, and the third valve port 193 of the first reversing valve 19 is connected to the inlet 131 of the compressor 13 through the gas-liquid separator 27; the outlet of the external terminal device 29 is connected to the second water inlet 163 of the air-conditioning side heat exchanger 16 through the second water pump 17, and the second water outlet 164 of the air-conditioning side heat exchanger 16 is connected to the inlet of the external terminal device 29. It should be noted here that the direction of the first one-way valve 20 and the second one-way valve 22 refers to the flow direction of the refrigerant, not the direction of the spatial position. In addition, except for the connection of the inlet and outlet, which has a refrigerant flow direction relationship, the connection between other interfaces, between interfaces and components, or between components is only a physical structure connection, and does not uniquely limit the refrigerant flow direction therein.

[0095] A heat pump is a device that utilizes the principle of heat transfer to transfer heat energy from a low-temperature heat source to heat energy from a high-temperature heat source. An embodiment of the utility model discloses a trigeneration system, comprising the outdoor unit and the terminal device 29 described in the above embodiment, wherein the outdoor unit is not described in detail here.

[0096] In different situations, different valve ports will be connected, as follows:

[0097] like Figure 6 As shown, when full heat recovery is performed to produce domestic hot water in the cooling mode, the eighth valve port 261 of the third reversing valve 26 is connected to the ninth valve port 262, the fifth valve port 251 of the second reversing valve 25 is connected to the seventh valve port 253, the fourth valve port 194 of the first reversing valve 19 is connected to the third valve port 193, the first throttling device 21 is opened, and the second throttling device 23 is closed. That is, when hot water needs to be prepared quickly in the cooling mode, the high-temperature gaseous refrigerant output from the outlet 132 of the compressor 13 first passes through the eighth valve port 261 and the ninth valve port 262 of the third reversing valve 26 and then enters the refrigerant inlet 141 of the hot water side heat exchanger 14, and the high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 12 in the hot water side heat exchanger 14, and becomes a medium-temperature liquid refrigerant after preparing hot water, and the medium-temperature liquid refrigerant output from the refrigerant outlet 142 of the hot water side heat exchanger 14 passes through the fifth valve port 251 and the seventh valve port 253 of the second reversing valve 25 and then enters the first interface 241 of the liquid storage container 24, and the liquid storage container 24 The medium-temperature liquid refrigerant output by the three interfaces 243 is throttled and cooled by the first throttling device 21 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the third refrigerant port 161 of the air-conditioning side heat exchanger 16. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 29 in the air-conditioning side heat exchanger 16, 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 fourth refrigerant port 162 of the air-conditioning side heat exchanger 16 passes through the fourth valve port 194 and the third valve port 193 of the first reversing valve 19, and then passes through the gas-liquid separator 27 and returns to the inlet 131 of the compressor 13, and circulates back and forth. The hot water side heat exchanger 14 is connected to the domestic water tank 12, so that all the condensation heat originally used for heat exchange with the air by the outdoor heat exchanger 11 can be recovered and utilized during summer cooling, avoiding the waste of all heat in the heat exchange between the outdoor heat exchanger 11 and the air. The recovered heat is exchanged with the water in the domestic water tank 12 in the hot water side heat exchanger 14 to quickly prepare hot water, improve energy utilization, and increase the speed of hot water production.

[0098] like Figure 7As shown, when waste heat recovery is performed to produce domestic hot water in the cooling mode, the eighth valve port 261 of the third reversing valve 26 is connected to the ninth valve port 262, the fifth valve port 251 of the second reversing valve 25 is connected to the sixth valve port 252, the first valve port 191 of the first reversing valve 19 is connected to the second valve port 192, the fourth valve port 194 of the first reversing valve 19 is connected to the third valve port 193, the first throttling device 21 is opened, and the second throttling device 23 is closed. That is, when hot water needs to be prepared in the cooling mode, the high-temperature gaseous refrigerant output from the outlet 132 of the compressor 13 first passes through the eighth valve port 261 and the ninth valve port 262 of the third reversing valve 26 and then enters the refrigerant inlet 141 of the hot water side heat exchanger 14. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 12 in the hot water side heat exchanger 14 and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 142 of the hot water side heat exchanger 14 passes through the fifth valve port 251 and the sixth valve port 252 of the second reversing valve 25 and the first valve port 191 and the second valve port 192 of the first reversing valve 19 and then enters the first refrigerant port 111 of the outdoor heat exchanger 11. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 11 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 112 passes through the first one-way valve 20 and enters the second interface 242 of the liquid storage container 24. The medium-temperature liquid refrigerant output from the third interface 243 of the liquid storage container 24 is throttled and cooled by the first throttling device 21 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the third refrigerant port 161 of the air-conditioning side heat exchanger 16. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 29 in the air-conditioning side heat exchanger 16, 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 fourth refrigerant port 162 of the air-conditioning side heat exchanger 16 passes through the fourth valve port 194 and the third valve port 193 of the first reversing valve 19 and then returns to the inlet 131 of the compressor 13 through the gas-liquid separator 27, and circulates back and forth. The hot water side heat exchanger 14 is connected to the domestic water tank 12, so that at least part of the condensation heat originally used for heat exchange with the air by the outdoor heat exchanger 11 can be recovered and utilized during summer cooling, thereby avoiding the waste of all heat in the heat exchange between the outdoor heat exchanger 11 and the air. The recovered heat is exchanged with the water in the domestic water tank 12 in the hot water side heat exchanger 14 to prepare hot water, thereby improving energy utilization.

[0099] Specifically, Figure 7 and Figure 6 The difference between the shown embodiments is that Figure 7 In order to recycle at least part of the condensation heat originally used for heat exchange with air by the outdoor heat exchanger 11, Figure 6 The purpose is to recover and utilize all the condensation heat originally used by the outdoor heat exchanger 11 for heat exchange with the air.

[0100] like Figure 8As shown, when waste heat recovery is performed to produce domestic hot water in the cooling mode, the eighth valve port 261 of the third reversing valve 26 is respectively connected with the ninth valve port 262 and the tenth valve port 263, the fifth valve port 251 of the second reversing valve 25 is connected with the sixth valve port 252, the first valve port 191 of the first reversing valve 19 is connected with the second valve port 192, the fourth valve port 194 of the first reversing valve 19 is connected with the third valve port 193, the first throttling device 21 is opened, and the second throttling device 23 is closed. That is, when hot water needs to be prepared in the cooling mode, the high-temperature gaseous refrigerant output from the outlet 132 of the compressor 13 enters the refrigerant inlet 141 of the hot water side heat exchanger 14 after passing through the eighth valve port 261 and the ninth valve port 262 of the third reversing valve 26, and enters the first valve port 191 and the second valve port 192 of the first reversing valve 19 after passing through the eighth valve port 261 and the tenth valve port 263 of the third reversing valve 26. The high-temperature gaseous refrigerant at the refrigerant port 111 is used for heat exchange with the water in the domestic water tank 12 in the hot water side heat exchanger 14 to prepare hot water and then becomes a medium-temperature gaseous refrigerant. The medium-temperature gaseous refrigerant outputted from the refrigerant outlet 142 of the hot water side heat exchanger 14 passes through the fifth valve port 251 and the sixth valve port 252 of the second reversing valve 25 and the first valve port 191 and the second valve port 192 of the first reversing valve 19 and then enters the first refrigerant port 111 of the outdoor heat exchanger 11. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 11 to become a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 112 of the outdoor heat exchanger 11 passes through the first one-way valve 20 and enters the second interface 242 of the liquid storage container 24. The medium-temperature liquid refrigerant output from the third interface 243 of the liquid storage container 24 passes through the first throttling device 21 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the first throttling device 21 of the air conditioning side heat exchanger 16. The third refrigerant port 161, the low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 29 in the air-conditioning side heat exchanger 16, 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 fourth refrigerant port 162 of the air-conditioning side heat exchanger 16 passes through the fourth valve port 194 and the third valve port 193 of the first reversing valve 19 and then returns to the inlet 131 of the compressor 13 through the gas-liquid separator 27, and circulates back and forth. The hot water side heat exchanger 14 is connected to the domestic water tank 12, so that at least part of the condensation heat originally used for heat exchange with air by the outdoor side heat exchanger 11 is recycled and utilized during summer cooling, avoiding the waste of all heat in the outdoor side heat exchanger 11 and air heat exchange. The recovered heat is exchanged with the water in the domestic water tank 12 in the hot water side heat exchanger 14 to prepare hot water, thereby improving energy utilization.

[0101] Specifically, Figure 8 and Figure 7 The difference between the shown embodiments is that Figure 8 In the embodiment shown, an additional refrigerant path enters the outdoor heat exchanger 11 after passing through the eighth valve port 261 and the tenth valve port 263 of the third reversing valve 26 and the first valve port 191 and the second valve port 192 of the first reversing valve 19, so that the amount of refrigerant entering the hot water side heat exchanger 14 can be better regulated, and the refrigerant coming out of the compressor 13 directly reaching the first reversing valve 19 can be guaranteed to be a gaseous refrigerant, while the refrigerant passing through the hot water side heat exchanger 14 may contain liquid refrigerant after heat exchange. Pure gaseous refrigerant can better ensure that the first reversing valve 19 has sufficient pressure difference for reversing, so that the pressure loss of the refrigerant pipeline is small, and the third reversing valve 26 is not easily affected by impurities, so that the system runs stably.

[0102] like Fig. 9As shown, when domestic hot water is produced in the heating mode, the eighth valve port 261 of the third reversing valve 26 is connected to the ninth valve port 262, the fifth valve port 251 of the second reversing valve 25 is connected to the sixth valve port 252, the first valve port 191 of the first reversing valve 19 is connected to the fourth valve port 194, the second valve port 192 of the first reversing valve 19 is connected to the third valve port 193, the first throttling device 21 is closed, and the second throttling device 23 is opened. That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet 132 of the compressor 13 first passes through the eighth valve port 261 and the ninth valve port 262 of the third reversing valve 26 and then enters the refrigerant inlet 141 of the hot water side heat exchanger 14. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 12 in the hot water side heat exchanger 14 and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 142 of the hot water side heat exchanger 14 passes through the fifth valve port 251 and the sixth valve port 252 of the second reversing valve 25 and the first valve port 191 and the fourth valve port 194 of the first reversing valve 19 and then enters the fourth refrigerant port 162 of the air-conditioning side heat exchanger 16. The medium-temperature gaseous refrigerant exchanges heat with the circulating water in the terminal device 29 in the air-conditioning side heat exchanger 16. After heat exchange, it becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the third refrigerant port 161 of the air-conditioning side heat exchanger 16 passes through the second one-way valve 22 and enters the third interface 243 of the liquid storage container 24. The medium-temperature liquid refrigerant output from the second interface 242 of the liquid storage container 24 passes through the second throttling device 23 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant port 112 of the outdoor heat exchanger 11. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 11 and becomes a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 111 of the outdoor heat exchanger 11 passes through the second valve port 192 and the third valve port 193 of the first reversing valve 19 and then returns to the inlet 131 of the compressor 13 through the gas-liquid separator 27, and circulates back and forth. The hot water side heat exchanger 14 is connected to the domestic water tank 12, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0103] like Fig.10As shown, when domestic hot water is produced in the heating mode, the eighth valve port 261 of the third reversing valve 26 is respectively connected with the ninth valve port 262 and the tenth valve port 263, the fifth valve port 251 of the second reversing valve 25 is connected with the sixth valve port 252, the first valve port 191 of the first reversing valve 19 is connected with the fourth valve port 194, the second valve port 192 of the first reversing valve 19 is connected with the third valve port 193, the first throttling device 21 is closed, and the second throttling device 23 is opened. That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet 132 of the compressor 13 enters the refrigerant inlet 141 of the hot water side heat exchanger 14 after passing through the eighth valve port 261 and the ninth valve port 262 of the third reversing valve 26, and enters the air conditioning side heat exchanger after passing through the eighth valve port 261 and the tenth valve port 263 of the third reversing valve 26 and the first valve port 191 and the fourth valve port 194 of the first reversing valve 19. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 12 in the hot water side heat exchanger 14, and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant outputted from the refrigerant outlet 142 of the hot water side heat exchanger 14 passes through the fifth valve port 251 and the sixth valve port 252 of the second reversing valve 25 and the first valve port 191 and the fourth valve port 194 of the first reversing valve 19 and then enters the first valve port 251 of the air conditioning side heat exchanger 16. At the four refrigerant ports 162, the medium-temperature gaseous refrigerant undergoes heat exchange with the circulating water in the terminal device 29 in the air-conditioning side heat exchanger 16 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant outputted from the third refrigerant port 161 of the air-conditioning side heat exchanger 16 enters the third interface 243 of the liquid storage container 24 after passing through the second one-way valve 22. The medium-temperature liquid refrigerant outputted from the second interface 242 of the liquid storage container 24 becomes a low-temperature liquid refrigerant with a lower temperature after throttling and cooling by the second throttling device 23, and then enters the second refrigerant port 112 of the outdoor heat exchanger 11. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 11 and becomes a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant outputted from the first refrigerant port 111 of the outdoor heat exchanger 11 passes through the second valve port 192 and the third valve port 193 of the first reversing valve 19 and then passes through the gas-liquid separator 27 and returns to the inlet 131 of the compressor 13, for a reciprocating cycle. The hot water side heat exchanger 14 is connected to the domestic water tank 12, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0104] Specifically, Fig.10 and Fig. 9 The difference between the shown embodiments is that Fig.10In the embodiment shown, an additional path is provided to enter the air-conditioning side heat exchanger 16 after passing through the eighth valve port 261 and the tenth valve port 263 of the third reversing valve 26 and the first valve port 191 and the fourth valve port 194 of the first reversing valve 19, so that the amount of refrigerant entering the hot water side heat exchanger 14 can be better regulated, and the refrigerant coming out of the compressor 13 directly reaching the first reversing valve 19 can be guaranteed to be a gaseous refrigerant, while the refrigerant passing through the hot water side heat exchanger 14 may contain liquid refrigerant after heat exchange. Pure gaseous refrigerant can better ensure that the first reversing valve 19 has sufficient pressure difference for reversing, so that the pressure loss of the refrigerant pipeline is small, and the third reversing valve 26 is not easily affected by impurities, so that the system runs stably.

[0105] like Fig.11 As shown, in the pure hot water mode, the eighth valve port 261 of the third reversing valve 26 is connected to the ninth valve port 262, the fifth valve port 251 of the second reversing valve 25 is connected to the seventh valve port 253, the second valve port 192 of the first reversing valve 19 is connected to the third valve port 193, the first throttling device 21 is closed, and the second throttling device 23 is opened. That is, when only hot water needs to be prepared, the high-temperature gaseous refrigerant output from the outlet 132 of the compressor 13 first passes through the eighth valve port 261 and the ninth valve port 262 of the third reversing valve 26 and then enters the refrigerant inlet 141 of the hot water side heat exchanger 14, and the high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 12 in the hot water side heat exchanger 14 to prepare hot water, and after preparing hot water, it becomes a medium-temperature liquid refrigerant, and the medium-temperature liquid refrigerant output from the refrigerant outlet 142 of the hot water side heat exchanger 14 passes through the fifth valve port 251 and the seventh valve port 253 of the second reversing valve 25 and then enters the first inlet 141 of the liquid storage container 24. The medium-temperature liquid refrigerant outputted from the second interface 242 of the liquid storage container 24 is throttled and cooled by the second throttling device 23 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant port 112 of the outdoor heat exchanger 11. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 11 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant outputted from the first refrigerant port 111 of the outdoor heat exchanger 11 passes through the second valve port 192 and the third valve port 193 of the first reversing valve 19 and then passes through the gas-liquid separator 27 and returns to the inlet 131 of the compressor 13, and circulates back and forth. The hot water side heat exchanger 14 is connected to the domestic water tank 12, so that all the heat from the compressor 13 can be used alone in the hot water side heat exchanger 14 for heat exchange with the water in the domestic water tank 12, and energy is used in a targeted manner. The refrigerant loop is shortened when making hot water, and it does not need to pass through the air conditioning side heat exchanger 16, and the heat exchange efficiency is higher.

[0106] like Fig.12As shown, in the cooling mode, the eighth valve port 261 of the third reversing valve 26 is connected to the tenth valve port 263, the first valve port 191 of the first reversing valve 19 is connected to the second valve port 192, the fourth valve port 194 of the first reversing valve 19 is connected to the third valve port 193, the first throttling device 21 is opened, and the second throttling device 23 is closed. That is, when cooling is performed alone in summer, the high-temperature gaseous refrigerant output from the outlet 132 of the compressor 13 passes through the eighth valve port 261 and the tenth valve port 263 of the third reversing valve 26 and the first valve port 191 and the second valve port 192 of the first reversing valve 19 and then enters the first refrigerant port 111 of the outdoor heat exchanger 11. The high-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 11 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 112 of the outdoor heat exchanger 11 passes through the first one-way valve 20 and then enters the second interface 242 of the liquid storage container 24. The third interface 243 of the liquid storage container 24 The output medium-temperature liquid refrigerant is throttled and cooled by the first throttling device 21 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the third refrigerant port 161 of the air-conditioning side heat exchanger 16. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 29 in the air-conditioning side heat exchanger 16, 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 fourth refrigerant port 162 of the air-conditioning side heat exchanger 16 passes through the fourth valve port 194 and the third valve port 193 of the first reversing valve 19, and then returns to the inlet 131 of the compressor 13 through the gas-liquid separator 27, and circulates back and forth.

[0107] like Fig.13As shown, in the heating mode, the eighth valve port 261 of the third reversing valve 26 is connected to the tenth valve port 263, the first valve port 191 of the first reversing valve 19 is connected to the fourth valve port 194, the second valve port 192 of the first reversing valve 19 is connected to the third valve port 193, the first throttling device 21 is closed, and the second throttling device 23 is opened. That is, when heating alone is used in winter, the high-temperature gaseous refrigerant output from the outlet 132 of the compressor 13 passes through the eighth valve port 261 and the tenth valve port 263 of the third reversing valve 26 and the first valve port 191 and the fourth valve port 194 of the first reversing valve 19 and then enters the fourth refrigerant port 162 of the air-conditioning side heat exchanger 16. The high-temperature gaseous refrigerant is converted into medium-temperature liquid refrigerant after heat exchange with the circulating water in the terminal device 29 in the air-conditioning side heat exchanger 16. The medium-temperature liquid refrigerant output from the third refrigerant port 161 of the air-conditioning side heat exchanger 16 passes through the second one-way valve 22 and then enters the first refrigerant port 162 of the liquid storage container 24. Three interfaces 243, the medium-temperature liquid refrigerant output from the second interface 242 of the liquid storage container 24 is throttled and cooled by the second throttling device 23 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant port 112 of the outdoor heat exchanger 11. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 11 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 111 of the outdoor heat exchanger 11 passes through the second valve port 192 and the third valve port 193 of the first reversing valve 19 and then returns to the inlet 131 of the compressor 13 through the gas-liquid separator 27, and repeats the cycle.

[0108] 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.

[0109] By implementing the utility model, the following beneficial effects are achieved:

[0110] The utility model constructs the first cavity 101 and the "L"-shaped second cavity 102 inside the outdoor unit, the outdoor heat exchanger 11 is installed in the first cavity 101, the domestic water tank 12 is vertically installed in the vertical space 1022 of the second cavity 102, and the compressor 13, the hot water side heat exchanger 14, the first water pump 15, the air conditioning side heat exchanger 16 and the second water pump 17 are installed in the lateral space 1021 of the second cavity 102, thereby improving the integration of the unit, reasonable spatial layout, improving space utilization, achieving miniaturization and weight balance, helping to improve the stability of the unit, reducing operating noise and vibration, and making full use of the lower space of the domestic water tank 12 and the outdoor heat exchanger 11, without occupying the space of the outdoor heat exchanger 11 or the space of the domestic water tank 12, and will not affect the air volume and heat exchange efficiency of the outdoor heat exchanger 11.

[0111] 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. An outdoor unit, characterized in that: include: A shell, wherein the shell has a first cavity and a second cavity inside, the second cavity is "L"-shaped and is arranged outside the first cavity, the second cavity includes a lateral space and a vertical space perpendicular to the lateral space, and the lateral space partially extends to below the first cavity; An outdoor heat exchanger, the outdoor heat exchanger is used to achieve heat exchange between the refrigerant and the outside air, and the outdoor heat exchanger is installed in the first cavity; A domestic water tank, the domestic water tank is used to store domestic water, and the domestic water tank is vertically installed in the vertical space of the second cavity; A compressor, a hot water side heat exchanger, a first water pump, an air conditioning side heat exchanger and a second water pump, wherein the compressor is used to provide refrigerant for the outdoor side heat exchanger, the hot water side heat exchanger and the air conditioning side heat exchanger, the hot water side heat exchanger is used to prepare hot water by heat exchange between the refrigerant and the water in the domestic water tank, the first water pump is used to provide power for the water circulation between the domestic water tank and the hot water side heat exchanger, the air conditioning side heat exchanger is used to realize heat exchange between the refrigerant and the water in the external terminal device, the second water pump is used to provide power for the water circulation between the air conditioning side heat exchanger and the external terminal device, and the compressor, the hot water side heat exchanger, the first water pump, the air conditioning side heat exchanger and the second water pump are installed in the lateral space of the second cavity.

2. The outdoor unit according to claim 1, characterized in that: The hot water side heat exchanger and the first water pump are located below the corresponding domestic water tank.

3. The outdoor unit according to claim 2, characterized in that: The housing includes a bottom plate located in the lateral space, and the outdoor unit further includes: A water tank bracket, wherein the water tank bracket is fixed to the base plate, the domestic water tank is installed on the water tank bracket to form a first accommodating space between the bottom of the domestic water tank and the base plate, and the hot water side heat exchanger and the first water pump are located in the first accommodating space.

4. The outdoor unit according to claim 3, characterized in that: The compressor, the air-conditioning-side heat exchanger and the second water pump are located below the outdoor-side heat exchanger.

5. The outdoor unit according to claim 4, characterized in that: The housing further comprises: A water receiving pan is used to collect condensed water. The water receiving pan is laterally arranged at the bottom of the outdoor heat exchanger. A second accommodating space is formed between the bottom of the water receiving pan and the bottom plate. The compressor, the air-conditioning side heat exchanger and the second water pump are located in the second accommodating space.

6. The outdoor unit according to claim 5, characterized in that: The first accommodating space and the second accommodating space constitute a lateral space of the second cavity.

7. The outdoor unit according to claim 1, characterized in that: The outdoor unit further comprises: A pressure buffer is used to adjust the water pressure between the air-conditioning side heat exchanger and the external terminal device, and the pressure buffer is installed in the lateral space of the second cavity.

8. The outdoor unit according to claim 1, characterized in that: The shell includes a bottom plate located in the transverse space, and the domestic water tank extends to the transverse space and is fixedly connected to the bottom plate.

9. The outdoor unit according to claim 1, characterized in that: The outdoor unit further comprises: A liquid storage container, the liquid storage container is used to store liquid refrigerant, and the liquid storage container is installed in the lateral space of the second cavity.

10. A trigeneration system, characterized in that: The outdoor unit comprises the outdoor unit described in any one of claims 1 to 9.

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