Outdoor unit and air source heat pump hot water system

Abstract

The utility model discloses an outdoor unit and an air source heat pump hot water system. The outdoor unit comprises a shell, an outdoor side heat exchanger, a water storage tank and a compressor. The outdoor heat exchanger is installed on one side in the shell, and the water storage tank is installed on the other side in the shell. The outdoor heat exchanger and the water storage tank are arranged in the shell in a stepped mode so that a first space and a second space which are different in vertical length can be formed in the lower areas of the outdoor heat exchanger and the water storage tank, the first space is located in the lower area of the outdoor heat exchanger, and the second space is located in the lower area of the water storage tank. The vertical length of the first space is larger than that of the second space. The compressor is installed in the first space. According to the utility model, system parts 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, the problem that the internal space of the outdoor unit is not enough when the water storage tank is placed in the outdoor unit is solved, the space utilization rate is improved, and miniaturization is realized.

Description

Technical Field

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

[0002] The outdoor unit of the existing heat pump system has many parts, including a water tank for storing a large amount of hot water and other parts. The water tank is usually arranged horizontally at the bottom of the outdoor unit, and other parts are arranged on the upper part of the water tank. However, this layout is unreasonable and has problems such as large size and insufficient space. Utility Model Content

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

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

[0005] shell;

[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 on one side of the interior of the shell;

[0007] A water tank, which is used to store domestic water and is installed on the other side of the housing;

[0008] The outdoor heat exchanger and the water storage tank are arranged in a stepped manner inside the shell to form a first space and a second space with different vertical lengths in the lower regions of the outdoor heat exchanger and the water storage tank, wherein the first space is located in the lower region of the outdoor heat exchanger, the second space is located in the lower region of the water storage tank, and the vertical length of the first space is greater than the vertical length of the second space;

[0009] A compressor is used to provide refrigerant for the outdoor heat exchanger, and the compressor is installed in the first space.

[0010] In one embodiment, the outdoor unit further comprises:

[0011] The first reversing valve is used to switch between the cooling mode and the heating mode, and the first reversing valve is installed in the first space.

[0012] In one embodiment, the first reversing valve is a four-way valve.

[0013] In one embodiment, the outdoor unit further comprises:

[0014] Domestic hot water heat exchanger, the compressor is also used to provide refrigerant for the domestic hot water heat exchanger, the domestic hot water heat exchanger is used to prepare hot water by exchanging heat between the refrigerant and the water in the water storage tank, and the domestic hot water heat exchanger is installed in the second space.

[0015] In one embodiment, the outdoor unit further comprises:

[0016] A first water pump, wherein the first water pump is used to provide power for water circulation between the water storage tank and the domestic hot water heat exchanger, and the first water pump is installed in the second space.

[0017] In one embodiment, the outdoor unit further comprises:

[0018] The air-conditioning side heat exchanger, the compressor is also used to provide refrigerant to the air-conditioning side heat exchanger, the air-conditioning side heat exchanger is used to realize heat exchange between the refrigerant and water in the external terminal device, and the air-conditioning side heat exchanger is installed in the first space.

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

[0020] A second water pump, the second water pump is used to provide power for water circulation between the air-conditioning side heat exchanger and the external terminal device, and the second water pump is installed in the first space.

[0021] In one embodiment, the outdoor unit further comprises:

[0022] A liquid storage container, the liquid storage container is used to store refrigerant, and the liquid storage container is installed in the first space.

[0023] In one embodiment, the outdoor unit further comprises:

[0024] A gas-liquid separator is used to separate liquid refrigerant and gaseous refrigerant, and the gas-liquid separator is installed in the first space.

[0025] The utility model also constructs an air source heat pump hot water system, comprising any of the outdoor units described above.

[0026] By implementing the utility model, the following beneficial effects are achieved:

[0027] The utility model arranges the outdoor heat exchanger and the water tank on both sides of the shell and the two are arranged in a stepped manner, so as to form a first space and a second space with different vertical lengths in the lower area of ​​the shell, wherein the first space is located below the outdoor heat exchanger, and the second space is located below the water tank, and the vertical length of the first space is greater than the vertical length of the second space, so that 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 water tank is built into the outdoor unit is solved, thereby improving space utilization and achieving miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0029] Figure 1 It is a schematic diagram of the overall structure of the outdoor unit of the utility model;

[0030] Figure 2 The first space and the second space are in the lower area of ​​the shell of the outdoor unit of the utility model, wherein the dotted line is a virtual boundary line, and the first space and the second space are connected;

[0031] Figure 3 It is a front view schematic diagram of the structure of the outdoor unit of the utility model;

[0032] Figure 4 It is a back schematic diagram of the structure of the outdoor unit of the utility model;

[0033] Figure 5 It is a schematic diagram of the air source heat pump hot water system of the utility model;

[0034] Figure 6 It is a schematic diagram of the refrigerant flow direction of the air source heat pump hot water system of the utility model in which hot water is prepared through a full heat recovery mode while cooling;

[0035] Figure 7 It is a schematic diagram of the flow direction of the first refrigerant in the air source heat pump hot water system of the utility model for preparing hot water through the waste heat recovery mode while cooling;

[0036] Figure 8 It is a schematic diagram of the flow direction of the second refrigerant in the air source heat pump hot water system of the utility model for preparing hot water through the waste heat recovery mode while cooling;

[0037] Fig. 9 It is a schematic diagram of the flow direction of the first refrigerant in the air source heat pump hot water system of the utility model when preparing hot water while heating;

[0038] Fig.10 It is a schematic diagram of the flow direction of the second refrigerant in the air source heat pump hot water system of the utility model when preparing hot water while heating;

[0039] Fig.11 It is a schematic diagram of the refrigerant flow direction of the air source heat pump hot water system of the utility model when preparing hot water purely;

[0040] Fig.12 It is a schematic diagram of the refrigerant flow direction of the air source heat pump hot water system of the utility model in the cooling mode;

[0041] Fig.13 It is a schematic diagram of the refrigerant flow direction of the air source heat pump hot water system of the utility model in the heating mode. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] It should be noted that the height direction Z of the housing 10 is the vertical direction, and the length direction Y of the housing 10 is the horizontal direction.

[0047] like Figures 1 to 4 As shown, an embodiment of the utility model discloses an outdoor unit, including a housing 10, an outdoor heat exchanger 11, a water storage tank 12 and a compressor 26, as follows:

[0048] 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 on one side inside the shell 10 .

[0049] like Figure 5 As shown, the water storage tank 12 includes a cold water inlet 121, a water outlet 122, a return water outlet 123 and a hot water outlet 124. The water storage tank 12 is used to store domestic water. Figure 3 As shown, the water tank 12 is installed on the other side of the housing 10 .

[0050] The outdoor heat exchanger 11 and the water storage tank 12 are arranged in a stepped manner inside the housing 10. Figure 2 As shown, a first space 101 and a second space 102 with different vertical lengths are formed in the lower area inside the shell 10, wherein the first space 101 is located in the lower area corresponding to the outdoor heat exchanger 11, and the second space 102 is located in the lower area corresponding to the water tank 12, and the vertical length of the first space 101 is greater than the vertical length of the second space 102.

[0051] It should be noted here that one side and the other side inside the outer shell 10 refer to the two sides on the length direction Y of the outer shell 10, the upper area and the lower area refer to the two areas on the height direction Z of the outer shell 10, and the outdoor heat exchanger 11 and the water tank 12 are arranged in a stepped manner inside the outer shell 10, which means that they are arranged in a stepped manner in the height direction Z of the outer shell 10.

[0052] like Figure 5 As shown, the compressor 26 includes an inlet 261 and an outlet 262, and the compressor 26 is used to provide refrigerant for the outdoor heat exchanger 11. Figure 3 As shown, the compressor 26 is installed inside the housing 10 and is located in the first space 101 .

[0053] In this embodiment, system components with different height requirements can be placed in the first space 101 and the second space 102, so that the internal space layout of the outdoor unit is reasonable, which solves the problem of insufficient internal space of the outdoor unit when the water tank 12 is built into the outdoor unit, improves space utilization, and achieves miniaturization.

[0054] In addition, the water tank side does not need air intake and can be installed against a wall to be applied to installation spaces with poor ventilation environments. The gaps left at both ends during the original installation are changed to gaps left on one side, 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 sufficient ventilation on the heat exchanger side, ensure heat exchange efficiency, and avoid the heat exchange efficiency of the outdoor heat exchanger being reduced due to insufficient ventilation space.

[0055] It also makes full use of the lower space of the outdoor heat exchanger 11 and the water tank 12, does not occupy the space of the outdoor heat exchanger 11 nor the space of the water tank 12, has a reasonable spatial layout, does not affect the air volume and heat exchange efficiency of the outdoor heat exchanger 11, improves the utilization rate of the water tank space, and improves the integration of the outdoor unit, thereby realizing the miniaturization of the product.

[0056] In some embodiments, Figure 2 and Figure 3 As shown, the height of the water tank 12 is greater than the height of the outdoor heat exchanger 11, and the lowest point of the water tank 12 is lower than the lowest point of the outdoor heat exchanger 11. This embodiment makes full use of the internal space of the outdoor unit to increase the height of the water tank 12 and improve the water volume.

[0057] In some embodiments, the outdoor unit further includes a compressor bracket (not shown), the housing 10 includes a chassis 105 located in the lower area, and the chassis 105 is used to be fixed to an external fixture, such as the ground. The compressor bracket is fixed to the chassis 105, and the compressor 26 is installed (for example, vertically installed) on the compressor bracket.

[0058] In some embodiments, the water tank 12 extends to the second space 102 and is fixedly connected to the bottom plate 105 .

[0059] In some embodiments, the water tank 12 is installed vertically. It should be noted that the vertical installation extends along the height direction Z of the shell 10. Since the density of hot water is lower than that of cold water, compared with the horizontal installation of the water tank 12, the vertical installation of the water tank 12 is conducive to allowing the prepared hot water to quickly rise to the top of the 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 water tank 12 is a metal tank body, such as a stainless steel cylindrical tank body. The outer wall surface of the water tank 12 is wrapped with a thermal insulation layer, such as thermal insulation cotton or polyurethane foam, and the thermal insulation layer is wrapped to prevent the heat loss of the prepared hot water. The stainless steel cylindrical tank body, the thermal insulation cotton and the polyurethane foam here are only examples and are not intended to limit the present application.

[0060] In some embodiments, an electric auxiliary heater, such as an electric heating rod, is provided in the water storage tank 12. In order to monitor the temperature in the water storage tank 12 in real time, a temperature detector, such as a thermometer, is provided in the water storage tank 12. The electric heating rod and the thermometer are merely examples and are not intended to limit the present application.

[0061] When water is heated, scale will be generated, and the scale will cause corrosion to the water tank 12. A water softening device and / or an anti-corrosion layer is provided in the 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 water tank 12, the magnesium rod will release magnesium ions, so that the water alkali and scale in the water tank 12 are reduced, effectively preventing a large amount of scale from being attached to the inner wall of the water tank 12, thereby avoiding corrosion to the water tank 12.

[0062] In some embodiments, a pressure relief device is provided on the top of the water tank 12, and the pressure relief device is used to release the pressure inside the 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.

[0063] In some embodiments, the outdoor unit further includes a domestic hot water heat exchanger 13, and the compressor 26 is further used to provide a refrigerant for the domestic hot water heat exchanger 13. Figure 5 As shown, the domestic hot water heat exchanger 13 includes a refrigerant inlet 131, a refrigerant outlet 132 connected to the refrigerant inlet 131, a first water inlet 133, and a first water outlet 134 connected to the first water inlet 133. The domestic hot water heat exchanger 13 is used to prepare hot water by heat exchange between the refrigerant and the water in the water storage tank 12. Figure 3 As shown, the domestic hot water heat exchanger 13 is installed in the second space 102 .

[0064] This embodiment facilitates the design and arrangement of pipelines, which is beneficial to reducing the pipelines between the domestic hot water heat exchanger 13 and the water storage tank 12, and avoiding the loss of heat and pipeline pressure during hot water transportation caused by excessively long pipelines.

[0065] In some embodiments, in order to further reduce the number of pipes between the domestic hot water heat exchanger 13 and the water tank 12 , the water outlet 122 is located at the bottom of the water tank 12 , and the water return port 123 is located in the middle of the water tank 12 .

[0066] In some embodiments, the water outlet 122 is connected to the first water inlet 133, the first water outlet 134 is connected to the water return port 123, there is a space between the water storage tank 12 and the corner inside the housing 10, and the pipeline connecting the first water outlet 134 to the water return port 123 is located in the space to make full use of the space in the corner. For example, the water storage tank 12 is cylindrical, and the cylindrical shape here is only an example and is not intended to limit the present application.

[0067] In some embodiments, Figure 3 As shown, the outdoor unit further includes a first heat exchanger bracket 32 ​​, which is fixed on the chassis 105 , and the domestic hot water heat exchanger 13 is mounted on the first heat exchanger bracket 32 ​​.

[0068] In some embodiments, Figure 3 As shown, the outdoor unit also includes a first water pump 14, which is used to provide power for the water circulation between the water storage tank 12 and the domestic hot water heat exchanger 13. The first water pump 14 is arranged in the water inlet pipe or the water outlet pipe of the domestic hot water heat exchanger 13, and the first water pump 14 is installed in the second space 102.

[0069] In some embodiments, the domestic hot water heat exchanger 13 is a shell-and-tube heat exchanger, which extends along the height direction Z of the housing 10 and is arranged around the periphery of the first water pump 14 to fully utilize the peripheral space of the first water pump 14. 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 water storage 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 14 is installed in the second space 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 14, and the hard pipe plays a supporting role. The first water pump bracket can also be fixed to a bracket on the chassis 105, and the first water pump 14 is installed on the first water pump bracket.

[0071] In some embodiments, Figure 3 As shown, the outdoor unit also includes a water tank bracket 33, and the water tank bracket 33 is fixed on the chassis 105. The water tank 12 is installed on the water tank bracket 33 to form the second space 102 between the bottom of the water tank 12 and the chassis 105, and the domestic hot water heat exchanger 13 and the first water pump 14 are installed in the second space 102.

[0072] In some embodiments, the first space 101, the second space 102, and the water tank area 103 on the side where the water tank 12 is located constitute an "L"-shaped cavity, and the side where the outdoor heat exchanger 11 is located is another independent cavity 104. For example, the other cavity 104 is a rectangle, and the rectangle here is only an example and is not intended to limit the present application. Among them, the first space 101, the second space 102, and the water tank area 103 on the side where the water tank 12 is located can be separated by a structure such as a partition, or there can be no partition.

[0073] Specifically, Figure 3 As shown, the outdoor unit further includes a partition 15 , which is disposed between the outdoor heat exchanger 11 and the water storage tank 12 along a height direction Z of the housing 10 and is connected to the housing 10 .

[0074] The outdoor unit further includes a water receiving pan 16 for collecting condensed water, which is disposed at the bottom of the outdoor heat exchanger 11 along the length direction Y of the housing 10 and connected to the partition 15 and the housing 10. The partition 15, the water receiving pan 16 and the housing 10 define the "L"-shaped cavity and the other cavity 104.

[0075] In some embodiments, Figure 3 As shown, the outdoor unit further includes a fan 17, which is used to drive the external air to exchange heat with the outdoor heat exchanger 11, and the fan 17 is installed on one side (the other cavity 104) inside the housing 10, that is, on the same side as the outdoor heat exchanger 11. 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.

[0076] Accordingly, if Figure 1 and Figure 4 As shown, the first side of the housing 10 corresponding to the fan 17 is provided with an air inlet 106, and the second side is provided with an air outlet 107. For example, the side of the housing 10 is provided with the air inlet 106, and the front is provided with the air outlet 107. 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.

[0077] In some embodiments, Figure 3 As shown, the water receiving tray 16 is provided with a heat dissipation hole 161, and the heat dissipation hole 161 connects the "L"-shaped cavity and the other cavity 104. When the fan 17 is started, the other cavity 104 is negative pressure, and the hot air generated by the components in the "L"-shaped cavity can be discharged to the outside.

[0078] In some embodiments, Figure 3 As shown, the outdoor unit also includes an air-conditioning side heat exchanger 18, and the compressor 26 is also used to provide refrigerant for the air-conditioning side heat exchanger 18. Figure 5 As shown, the air-conditioning side heat exchanger 18 includes a third refrigerant port 181, a fourth refrigerant port 182 connected to the third refrigerant port 181, a second water inlet 183, and a second water outlet 184 connected to the second water inlet 183. The air-conditioning side heat exchanger 18 is used to realize heat exchange between the refrigerant and the water in the external terminal device 31, as shown in FIG. Figure 3 As shown, the air-conditioning side heat exchanger 18 is installed in the first space 101 .

[0079] For example, the air-conditioning side heat exchanger 18 is a plate heat exchanger, and the external terminal device 31 may include an air disk and / or floor heating installed indoors, and may further include a hydraulic module connected between the air-conditioning side heat exchanger 18 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.

[0080] In some embodiments, the second heat exchanger bracket 34 is fixed on the chassis 105 , and the air-conditioning side heat exchanger 18 is installed (for example, vertically installed) on the second heat exchanger bracket 34 .

[0081] In some embodiments, Figure 4 As shown, the outdoor unit also includes a second water pump 19, which is arranged in the water inlet pipe or the water outlet pipe of the air-conditioning side heat exchanger 18. The second water pump 19 is used to provide power for the water circulation between the air-conditioning side heat exchanger 18 and the external terminal device 31. The second water pump 19 is installed in the first space 101.

[0082] In some embodiments, the outdoor unit further includes a second water pump bracket (not shown), and the second water pump 19 is installed in the first space 101 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 19, and the hard pipe plays a supporting role. The second water pump bracket can also be fixed to a bracket on the chassis 105, and the second water pump 19 is installed on the second water pump bracket.

[0083] In some embodiments, Figure 4 As shown, the outdoor unit further includes a pressure buffer 35, which is used to adjust the water pressure between the air-conditioning side heat exchanger 18 and the external terminal device 31, and the pressure buffer 35 is installed in the first space 101. For example, the pressure buffer 35 is an expansion tank, which is only an example and is not intended to limit the present application.

[0084] Specifically, the second water pump 19 and the pressure buffer 35 are stacked in the height direction Z of the housing 10, and the second water pump 19 and the pressure buffer 35 are located at one end of the interior width direction X of the housing 10, and the air-conditioning side heat exchanger 18 is located at the other end of the interior width direction X of the housing 10. For example, the pressure buffer 35 is installed (such as horizontally installed) on the chassis 105, and the second water pump 19 is located above the pressure buffer 35. It should be noted that the horizontal installation is to extend along the length and width plane of the housing 10.

[0085] In some embodiments, Figure 5 As shown, the outdoor unit further includes a first reversing valve 20, which includes a first valve port 201, a second valve port 202, a third valve port 203 and a fourth valve port 204. The first reversing valve 20 is used to switch between the cooling mode and the heating mode. Figure 4 As shown, the first reversing valve 20 is installed in the first space 101. For example, the first reversing valve 20 is a four-way valve, and the four-way valve here is only an example and is not intended to limit the present application.

[0086] In some embodiments, Figure 4 As shown, the outdoor unit also includes a first one-way valve 21 and a first throttling device 22. The first one-way valve 21 and the first throttling device 22 are used for throttling and cooling the refrigerant in the cooling mode. The first one-way valve 21 and the first throttling device 22 are installed in the first space 101.

[0087] The outdoor unit also includes a second one-way valve 23 and a second throttling device 24. The second one-way valve 23 and the second throttling device 24 are used for throttling and cooling the refrigerant in the heating mode. The second one-way valve 23 and the second throttling device 24 are installed in the first space 101.

[0088] For example, the first throttling device 22 and the second throttling device 24 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.

[0089] In some embodiments, Figure 5 As shown, the outdoor unit further includes a liquid storage container 25, which includes a first interface 251, a second interface 252 and a third interface 253. The liquid storage container 25 is used to store liquid refrigerant. Figure 3 As shown, the liquid storage container 25 is installed in the first space 101. Specifically, the liquid storage container 25 is installed (for example, vertically installed) on the chassis 105.

[0090] In some embodiments, Figure 5 As shown, the outdoor unit further includes a second reversing valve 27, which includes a fifth valve port 271, a sixth valve port 272 and a seventh valve port 273. The second reversing valve 27 is used to control the amount of refrigerant entering the domestic hot water heat exchanger 13. Figure 3 As shown, the second reversing valve 27 is installed in the first space 101 .

[0091] The outdoor unit also includes a third reversing valve 28, which includes an eighth valve port 281, a ninth valve port 282 and a tenth valve port 283. The third reversing valve 28 is used to exchange all or at least part of the heat of the refrigerant in the domestic hot water heat exchanger 13. The third reversing valve 28 is installed in the first space 101.

[0092] For example, the second reversing valve 27 and the third reversing valve 28 are three-way valves, and the three-way valves here are only examples and are not intended to limit the present application.

[0093] In some embodiments, Figure 3 As shown, the outdoor unit further includes a gas-liquid separator 29, which is used to separate gaseous refrigerant and liquid refrigerant, and is installed in the first space 101. Specifically, the gas-liquid separator 29 is installed (for example, vertically installed) on the chassis 105.

[0094] In some embodiments, Figure 3As shown, the outdoor unit further includes an electric control box 30, which is used to control various electric control components in the housing 10, such as the compressor 26, the first water pump 14, the fan 17, the second water pump 19, the first reversing valve 20, the first throttling device 22, the second throttling device 24, the second reversing valve 27 and the third reversing valve 28, and the electric control box 30 is installed in the first space 101. Specifically, the electric control box 30 is installed (for example, vertically installed) on the chassis 105.

[0095] Furthermore, the main control board of the control box 30 is provided with a heat sink 301, and the heat sink 301 corresponds to the heat dissipation hole 161. For example, the heat sink 301 is a heat dissipation fin, which is only an example and is not intended to limit the present application.

[0096] Completely, as Figure 3 and Figure 4 As shown, the main vibrating parts including the compressor 26, the domestic hot water heat exchanger 13, the first water pump 14, the air-conditioning side heat exchanger 18, the second water pump 19, the liquid storage container 25, the gas-liquid separator 29, the electric control box 30 and the pressure buffer 35 are fixed on the chassis 105, 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.

[0097] Through the above structural layout, the compressor 26, the domestic hot water heat exchanger 13, the first water pump 14, the air-conditioning side heat exchanger 18, the second water pump 19, the first reversing valve 20, the first non-return valve 21, the first throttling device 22, the second non-return valve 23, the second throttling device 24, the liquid storage container 25, the second reversing valve 27, the third reversing valve 28, the gas-liquid separator 29, the electric control box 30 and the pressure buffer 35 are located in the space below the water storage tank 12 and the outdoor heat exchanger 11, and do not occupy the space of the outdoor heat exchanger 11 or the water storage tank 12. The space layout is reasonable, and the air volume and heat exchange efficiency of the outdoor heat exchanger 11 will not be affected, thereby improving the space utilization rate, and improving the integration of the outdoor unit, realizing the miniaturization of the product, and being able to complete heating, cooling and preparing domestic hot water without additional equipment such as hydraulic modules and domestic hot water modules, thereby reducing the complexity of installing multiple devices during the engineering installation process and improving the user experience.

[0098] like Figure 5As shown, the connection relationship between the above-mentioned components is as follows: the outlet 262 of the compressor 26 is connected to the fifth valve port 271 of the second reversing valve 27, the sixth valve port 272 of the second reversing valve 27 is connected to the refrigerant inlet 131 of the domestic hot water heat exchanger 13, and the seventh valve port 273 of the second reversing valve 27 is connected to the first valve port 201 of the first reversing valve 20; the refrigerant outlet 132 of the domestic hot water heat exchanger 13 is connected to the eighth valve port 281 of the third reversing valve 28, and the ninth valve port 282 of the third reversing valve 28 is connected to the first valve port 201 of the first reversing valve 20. The tenth valve port 283 of the third reversing valve 28 is connected to the first interface 251 of the liquid storage container 25; the water outlet 122 of the water storage tank 12 is connected to the first water inlet 133 of the domestic hot water heat exchanger 13 via the first water pump 14, and the first water outlet 134 of the domestic hot water heat exchanger 13 is connected to the return water port 123 of the water storage tank 12; the second valve port 202 of the first reversing valve 20 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 25 through the first one-way valve 21. The second refrigerant port 112 of the outdoor heat exchanger 11 is connected to the second interface 252 of the liquid storage container 25, the conducting direction of the first one-way valve 21 is toward the second interface 252 end of the liquid storage container 25, the second refrigerant port 112 of the outdoor heat exchanger 11 is connected to the second interface 252 of the liquid storage container 25 through the second throttling device 24; the third refrigerant port 181 of the air-conditioning side heat exchanger 18 is connected to the third interface 253 of the liquid storage container 25 through the first throttling device 22, and the third refrigerant port 181 of the air-conditioning side heat exchanger 18 is connected to the third interface 253 of the liquid storage container 25 through the second one-way valve 23. 53 is connected, and the conduction direction of the second one-way valve 23 is toward the third interface 253 end of the liquid storage container 25; the fourth refrigerant port 182 of the air-conditioning side heat exchanger 18 is connected to the fourth valve port 204 of the first reversing valve 20, and the third valve port 203 of the first reversing valve 20 is connected to the inlet 261 of the compressor 26 through the gas-liquid separator 29; the outlet of the external terminal device 31 is connected to the second water inlet 183 of the air-conditioning side heat exchanger 18 through the second water pump 19, and the second water outlet 184 of the air-conditioning side heat exchanger 18 is connected to the inlet of the external terminal device 31. It should be noted here that the direction of the first one-way valve 21 and the second one-way valve 23 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.

[0099] A heat pump is a device that utilizes the principle of heat energy 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 an air source heat pump hot water system, comprising the outdoor unit and the terminal device 31 described in the above embodiment, wherein the outdoor unit is not described in detail here.

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

[0101] like Figure 6 As shown, when full heat recovery is performed to produce domestic hot water in the cooling mode, the fifth valve port 271 of the second reversing valve 27 is connected to the sixth valve port 272, the eighth valve port 281 of the third reversing valve 28 is connected to the tenth valve port 283, the fourth valve port 204 of the first reversing valve 20 is connected to the third valve port 203, the first throttling device 22 is opened, and the second throttling device 24 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 262 of the compressor 26 first passes through the fifth valve port 271 and the sixth valve port 272 of the second reversing valve 27 and then enters the refrigerant inlet 131 of the domestic hot water heat exchanger 13, and the high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 12 in the domestic hot water heat exchanger 13, and becomes a medium-temperature liquid refrigerant after preparing hot water. The medium-temperature liquid refrigerant output from the refrigerant outlet 132 of the domestic hot water heat exchanger 13 passes through the eighth valve port 281 and the tenth valve port 283 of the third reversing valve 28 and then enters the first interface 251 of the liquid storage container 25, and the first interface 251 of the liquid storage container 25 The medium-temperature liquid refrigerant output by the three interfaces 253 is throttled and cooled by the first throttling device 22 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the third refrigerant port 181 of the air-conditioning side heat exchanger 18. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 31 in the air-conditioning side heat exchanger 18, 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 182 of the air-conditioning side heat exchanger 18 passes through the fourth valve port 204 and the third valve port 203 of the first reversing valve 20, and then passes through the gas-liquid separator 29 and returns to the inlet 261 of the compressor 26, and circulates back and forth. The domestic hot water heat exchanger 13 is connected to the water storage 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, thereby avoiding 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 water storage tank 12 in the domestic hot water heat exchanger 13 to quickly prepare hot water, improve energy utilization, and increase the speed of hot water production.

[0102] like Figure 7As shown, when waste heat recovery is performed to produce domestic hot water in the cooling mode, the fifth valve port 271 of the second reversing valve 27 is connected to the sixth valve port 272, the eighth valve port 281 of the third reversing valve 28 is connected to the ninth valve port 282, the first valve port 201 of the first reversing valve 20 is connected to the second valve port 202, the fourth valve port 204 of the first reversing valve 20 is connected to the third valve port 203, the first throttling device 22 is opened, and the second throttling device 24 is closed. That is, when hot water needs to be prepared in the cooling mode, the high-temperature gaseous refrigerant output from the outlet 262 of the compressor 26 first passes through the fifth valve port 271 and the sixth valve port 272 of the second reversing valve 27 and then enters the refrigerant inlet 131 of the domestic hot water heat exchanger 13. The high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 12 in the domestic hot water heat exchanger 13 and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 132 of the domestic hot water heat exchanger 13 passes through the eighth valve port 281 and the ninth valve port 282 of the third reversing valve 28 and the first valve port 201 and the second valve port 202 of the first reversing valve 20 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 of the air conditioner 1 enters the second interface 252 of the liquid storage container 25 after passing through the first one-way valve 21. The medium-temperature liquid refrigerant output from the third interface 253 of the liquid storage container 25 becomes a low-temperature liquid refrigerant with a lower temperature after throttling and cooling by the first throttling device 22, and then enters the third refrigerant port 181 of the air-conditioning side heat exchanger 18. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 31 in the air-conditioning side heat exchanger 18, 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 182 of the air-conditioning side heat exchanger 18 passes through the fourth valve port 204 and the third valve port 203 of the first reversing valve 20, and then returns to the inlet 261 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 13 is connected to the water storage 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 water storage tank 12 in the domestic hot water heat exchanger 13 to prepare hot water, thereby improving energy utilization.

[0103] 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.

[0104] like Figure 8As shown, when waste heat recovery is performed to produce domestic hot water in the cooling mode, the fifth valve port 271 of the second reversing valve 27 is respectively connected to the sixth valve port 272 and the seventh valve port 273, the eighth valve port 281 of the third reversing valve 28 is connected to the ninth valve port 282, the first valve port 201 of the first reversing valve 20 is connected to the second valve port 202, the fourth valve port 204 of the first reversing valve 20 is connected to the third valve port 203, the first throttling device 22 is opened, and the second throttling device 24 is closed. That is, when hot water needs to be prepared in the cooling mode, the high-temperature gaseous refrigerant outputted from the outlet 262 of the compressor 26 enters the refrigerant inlet 131 of the domestic hot water heat exchanger 13 through the fifth valve port 271 and the sixth valve port 272 of the second reversing valve 27, and enters the refrigerant inlet 131 of the domestic hot water heat exchanger 13 through the fifth valve port 271 and the seventh valve port 273 of the second reversing valve 27 and the first valve port 201 and the second valve port 202 of the first reversing valve 20. A refrigerant port 111, the high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 12 in the domestic hot water heat exchanger 13, and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 132 of the domestic hot water heat exchanger 13 passes through the eighth valve port 281 and the ninth valve port 282 of the third reversing valve 28 and the first valve port 201 and the second valve port 202 of the first reversing valve 20 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 21 and enters the second interface 252 of the liquid storage container 25. The medium-temperature liquid refrigerant output from the third interface 253 of the liquid storage container 25 passes through the first throttling device 22 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the first throttling device 22 of the air-conditioning side heat exchanger 18. The third refrigerant port 181, the low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 31 in the air-conditioning side heat exchanger 18, 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 182 of the air-conditioning side heat exchanger 18 passes through the fourth valve port 204 and the third valve port 203 of the first reversing valve 20 and then returns to the inlet 261 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 13 is connected to the water storage tank 12, so that at least part of the condensation heat originally used for heat exchange with air by the outdoor heat exchanger 11 is recycled and utilized during summer cooling, avoiding the waste of all heat in the outdoor heat exchanger 11 and air heat exchange. The recycled heat is exchanged with the water in the water storage tank 12 in the domestic hot water heat exchanger 13 to prepare hot water, thereby improving energy utilization.

[0105] Specifically, Figure 8 and Figure 7 The difference between the shown embodiments is that Figure 8 In the embodiment shown, an additional refrigerant path passes through the fifth valve port 271 and the seventh valve port 273 of the second reversing valve 27 and the first valve port 201 and the second valve port 202 of the first reversing valve 20 and then enters the outdoor heat exchanger 11, so that the amount of refrigerant entering the domestic hot water heat exchanger 13 can be better regulated, and the refrigerant coming out of the compressor 26 directly reaching the first reversing valve 20 can be guaranteed to be a gaseous refrigerant, while the refrigerant passing through the domestic hot water heat exchanger 13 may contain liquid refrigerant after heat exchange. Pure gaseous refrigerant can better ensure that the first reversing valve 20 has sufficient pressure difference for reversing, so that the pressure loss of the refrigerant pipeline is small, and the second reversing valve 27 is not easily affected by impurities, so that the system runs stably.

[0106] like Fig. 9As shown, when domestic hot water is produced in the heating mode, the fifth valve port 271 of the second reversing valve 27 is connected to the sixth valve port 272, the eighth valve port 281 of the third reversing valve 28 is connected to the ninth valve port 282, the first valve port 201 of the first reversing valve 20 is connected to the fourth valve port 204, the second valve port 202 of the first reversing valve 20 is connected to the third valve port 203, the first throttling device 22 is closed, and the second throttling device 24 is opened. That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet 262 of the compressor 26 first passes through the fifth valve port 271 and the sixth valve port 272 of the second reversing valve 27 and then enters the refrigerant inlet 131 of the domestic hot water heat exchanger 13. The high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 12 in the domestic hot water heat exchanger 13, and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 132 of the domestic hot water heat exchanger 13 passes through the eighth valve port 281 and the ninth valve port 282 of the third reversing valve 28 and the first valve port 201 and the fourth valve port 204 of the first reversing valve 20 and then enters the fourth refrigerant port 182 of the air-conditioning side heat exchanger 18. The medium-temperature gaseous refrigerant exchanges heat with the circulating water in the terminal device 31 in the air-conditioning side heat exchanger 18. After the water undergoes heat exchange, it becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the third refrigerant port 181 of the air-conditioning side heat exchanger 18 passes through the second one-way valve 23 and enters the third interface 253 of the liquid storage container 25. The medium-temperature liquid refrigerant output from the second interface 252 of the liquid storage container 25 passes through the second throttling device 24 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 202 and the third valve port 203 of the first reversing valve 20 and then returns to the inlet 261 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 13 is connected to the water storage tank 12, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0107] like Fig.10As shown, when domestic hot water is produced in the heating mode, the fifth valve port 271 of the second reversing valve 27 is respectively connected with the sixth valve port 272 and the seventh valve port 273, the eighth valve port 281 of the third reversing valve 28 is connected with the ninth valve port 282, the first valve port 201 of the first reversing valve 20 is connected with the fourth valve port 204, the second valve port 202 of the first reversing valve 20 is connected with the third valve port 203, the first throttling device 22 is closed, and the second throttling device 24 is opened. That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet 262 of the compressor 26 enters the refrigerant inlet 131 of the domestic hot water heat exchanger 13 after passing through the fifth valve port 271 and the sixth valve port 272 of the second reversing valve 27 on one path, and enters the fourth refrigerant port 182 of the air-conditioning side heat exchanger 18 on the other path after passing through the fifth valve port 271 and the seventh valve port 273 of the second reversing valve 27 and the first valve port 201 and the fourth valve port 204 of the first reversing valve 20. The high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 12 in the domestic hot water heat exchanger 13, and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 132 of the domestic hot water heat exchanger 13 enters the refrigerant inlet 131 of the domestic hot water heat exchanger 13 after passing through the eighth valve port 281 and the ninth valve port 282 of the third reversing valve 28 and the first valve port 201 and the fourth valve port 204 of the first reversing valve 20 At the fourth refrigerant port 182, the medium-temperature gaseous refrigerant undergoes heat exchange with the circulating water in the terminal device 31 in the air-conditioning side heat exchanger 18 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant outputted from the third refrigerant port 181 of the air-conditioning side heat exchanger 18 passes through the second one-way valve 23 and enters the third interface 253 of the liquid storage container 25. The medium-temperature liquid refrigerant outputted from the second interface 252 of the liquid storage container 25 passes through the second throttling device 24 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 outputted from the first refrigerant port 111 of the outdoor heat exchanger 11 passes through the second valve port 202 and the third valve port 203 of the first reversing valve 20 and then passes through the gas-liquid separator 29 and returns to the inlet 261 of the compressor 26, for a reciprocating cycle. The domestic hot water heat exchanger 13 is connected to the water storage tank 12, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0108] 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 18 after passing through the fifth valve port 271 and the seventh valve port 273 of the second reversing valve 27 and the first valve port 201 and the fourth valve port 204 of the first reversing valve 20, so that the amount of refrigerant entering the domestic hot water heat exchanger 13 can be better regulated, and the refrigerant coming out of the compressor 26 directly reaching the first reversing valve 20 can be guaranteed to be a gaseous refrigerant, while the refrigerant passing through the domestic hot water heat exchanger 13 may contain liquid refrigerant after heat exchange. Pure gaseous refrigerant can better ensure that the first reversing valve 20 has sufficient pressure difference for reversing, so that the pressure loss of the refrigerant pipeline is small, and the second reversing valve 27 is not easily affected by impurities, so that the system runs stably.

[0109] like Fig.11 As shown, in the pure hot water mode, the fifth valve port 271 of the second reversing valve 27 is connected to the sixth valve port 272, the eighth valve port 281 of the third reversing valve 28 is connected to the tenth valve port 283, the second valve port 202 of the first reversing valve 20 is connected to the third valve port 203, the first throttling device 22 is closed, and the second throttling device 24 is opened. That is, when only hot water needs to be prepared, the high-temperature gaseous refrigerant output from the outlet 262 of the compressor 26 first passes through the fifth valve port 271 and the sixth valve port 272 of the second reversing valve 27 and then enters the refrigerant inlet 131 of the domestic hot water heat exchanger 13. The high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 12 in the domestic hot water heat exchanger 13 to prepare hot water, and becomes a medium-temperature liquid refrigerant after preparing hot water. The medium-temperature liquid refrigerant output from the refrigerant outlet 132 of the domestic hot water heat exchanger 13 passes through the eighth valve port 281 and the tenth valve port 283 of the third reversing valve 28 and then enters the first refrigerant inlet 131 of the liquid storage container 25. The medium-temperature liquid refrigerant output from the second interface 252 of the liquid storage container 25 is throttled and cooled by the second throttling device 24 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 202 and the third valve port 203 of the first reversing valve 20 and then returns to the inlet 261 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 13 is connected to the water storage tank 12, so that all the heat from the compressor 26 can be used alone in the domestic hot water heat exchanger 13 for heat exchange with the water in the water storage tank 12, and energy is used in a targeted manner. The refrigerant circuit is shortened when making hot water, and it does not need to pass through the air-conditioning side heat exchanger 18, and the heat exchange efficiency is higher.

[0110] like Fig.12As shown, in the cooling mode, the fifth valve port 271 of the second reversing valve 27 is connected to the seventh valve port 273, the first valve port 201 of the first reversing valve 20 is connected to the second valve port 202, the fourth valve port 204 of the first reversing valve 20 is connected to the third valve port 203, the first throttling device 22 is opened, and the second throttling device 24 is closed. That is, when cooling is performed alone in summer, the high-temperature gaseous refrigerant output from the outlet 262 of the compressor 26 passes through the fifth valve port 271 and the seventh valve port 273 of the second reversing valve 27 and the first valve port 201 and the second valve port 202 of the first reversing valve 20 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 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 21 and then enters the second interface 252 of the liquid storage container 25. The third interface 253 of the liquid storage container 25 The output medium-temperature liquid refrigerant is throttled and cooled by the first throttling device 22 to become a low-temperature liquid refrigerant with a lower temperature, and then enters the third refrigerant port 181 of the air-conditioning side heat exchanger 18. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 31 in the air-conditioning side heat exchanger 18, 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 182 of the air-conditioning side heat exchanger 18 passes through the fourth valve port 204 and the third valve port 203 of the first reversing valve 20, and then returns to the inlet 261 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth.

[0111] like Fig.13As shown, in the heating mode, the fifth valve port 271 of the second reversing valve 27 is connected with the seventh valve port 273, the first valve port 201 of the first reversing valve 20 is connected with the fourth valve port 204, the second valve port 202 of the first reversing valve 20 is connected with the third valve port 203, the first throttling device 22 is closed, and the second throttling device 24 is opened. That is, when heating alone is used in winter, the high-temperature gaseous refrigerant output from the outlet 262 of the compressor 26 passes through the fifth valve port 271 and the seventh valve port 273 of the second reversing valve 27 and the first valve port 201 and the fourth valve port 204 of the first reversing valve 20 and then enters the fourth refrigerant port 182 of the air-conditioning side heat exchanger 18. The high-temperature gaseous refrigerant is converted into medium-temperature liquid refrigerant after heat exchange with the circulating water in the terminal device 31 in the air-conditioning side heat exchanger 18. The medium-temperature liquid refrigerant output from the third refrigerant port 181 of the air-conditioning side heat exchanger 18 passes through the second one-way valve 23 and then enters the first refrigerant port 202 of the liquid storage container 25. Three interfaces 253, the medium-temperature liquid refrigerant output from the second interface 252 of the liquid storage container 25 is throttled and cooled by the second throttling device 24 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 202 and the third valve port 203 of the first reversing valve 20, and then returns to the inlet 261 of the compressor 26 through the gas-liquid separator 29, and repeats the cycle.

[0112] 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.

[0113] By implementing the utility model, the following beneficial effects are achieved:

[0114] The utility model arranges the outdoor heat exchanger 11 and the water tank 12 on both sides of the shell 10 in a stepped manner, so as to form a first space 101 and a second space 102 with different vertical lengths in the lower area of ​​the shell 10, wherein the first space 101 is located in the lower area of ​​the outdoor heat exchanger 11, and the second space 102 is located in the lower area of ​​the water tank 12, and the vertical length of the first space 101 is greater than the vertical length of the second space 102, so that system components with different height requirements can be placed in the first space 101 and the second space 102, 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 water tank 12 is built into the outdoor unit is solved, thereby improving space utilization and realizing miniaturization.

[0115] 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: shell; 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 on one side of the interior of the shell; A water tank, which is used to store domestic water and is installed on the other side of the housing; The outdoor heat exchanger and the water storage tank are arranged in a stepped manner inside the shell to form a first space and a second space with different vertical lengths in the lower regions of the outdoor heat exchanger and the water storage tank, wherein the first space is located in the lower region of the outdoor heat exchanger, the second space is located in the lower region of the water storage tank, and the vertical length of the first space is greater than the vertical length of the second space; A compressor is used to provide refrigerant for the outdoor heat exchanger, and the compressor is installed in the first space.

2. The outdoor unit according to claim 1, characterized in that: The outdoor unit further comprises: The first reversing valve is used to switch between the cooling mode and the heating mode, and the first reversing valve is installed in the first space.

3. The outdoor unit according to claim 2, characterized in that: The first reversing valve is a four-way valve.

4. The outdoor unit according to claim 1, characterized in that: The outdoor unit further comprises: Domestic hot water heat exchanger, the compressor is also used to provide refrigerant for the domestic hot water heat exchanger, the domestic hot water heat exchanger is used to prepare hot water by exchanging heat between the refrigerant and the water in the water storage tank, and the domestic hot water heat exchanger is installed in the second space.

5. The outdoor unit according to claim 4, characterized in that: The outdoor unit further comprises: A first water pump, wherein the first water pump is used to provide power for water circulation between the water storage tank and the domestic hot water heat exchanger, and the first water pump is installed in the second space.

6. The outdoor unit according to claim 1, characterized in that: The outdoor unit further comprises: The air-conditioning side heat exchanger, the compressor is also used to provide refrigerant to the air-conditioning side heat exchanger, the air-conditioning side heat exchanger is used to realize heat exchange between the refrigerant and water in the external terminal device, and the air-conditioning side heat exchanger is installed in the first space.

7. The outdoor unit according to claim 6, characterized in that: The outdoor unit further comprises: A second water pump, the second water pump is used to provide power for water circulation between the air-conditioning side heat exchanger and the external terminal device, and the second water pump is installed in the first space.

8. 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 refrigerant, and the liquid storage container is installed in the first space.

9. The outdoor unit according to claim 1, characterized in that: The outdoor unit further comprises: A gas-liquid separator is used to separate liquid refrigerant and gaseous refrigerant, and the gas-liquid separator is installed in the first space.

10. An air source heat pump hot water system, characterized in that: The outdoor unit comprises the outdoor unit described in any one of claims 1 to 9.

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