Outdoor unit and heat pump hot water system

Abstract

The utility model discloses an outdoor unit and a heat pump hot water system. The outdoor unit comprises a shell, a domestic water tank, a domestic hot water heat exchanger and a hot water pump. The domestic water tank is installed in the shell, and the domestic hot water heat exchanger and the hot water pump are installed in the shell and located below the domestic water tank correspondingly. The integration level of the domestic water tank, the domestic hot water heat exchanger and the hot water pump is high, layout optimization of the outdoor unit is facilitated, miniaturization design is achieved, design and arrangement of pipelines are facilitated, reduction of the pipelines between the domestic hot water heat exchanger and the domestic water tank is facilitated, and the heat exchange efficiency is improved. And loss of heat and pipeline pressure in the hot water conveying process due to the fact that the pipeline is too long is avoided.

Description

Technical Field

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

[0002] In the related art, heat pumps usually prepare hot water through a heat exchanger and store a large amount of hot water through a domestic water tank. However, the heat exchanger and the domestic water tank are separately arranged, the unit integration is low, and the number of pipelines increases. Excessively long pipelines will also cause heat and pipeline pressure loss during hot water transportation. Utility Model Content

[0003] Based on this, it is necessary to provide an outdoor unit and a 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] A domestic water tank, which is used to store domestic water and is installed inside the housing;

[0007] A domestic hot water heat exchanger and a hot water pump, wherein the domestic hot water heat exchanger is used to prepare hot water by exchanging heat between a refrigerant and the water in the domestic water tank, and the hot water pump is used to provide power for the water circulation between the domestic water tank and the domestic hot water heat exchanger. The domestic hot water heat exchanger and the hot water pump are installed inside the outer shell and are located below the corresponding domestic water tank.

[0008] In one embodiment, the domestic hot water heat exchanger is a shell and tube heat exchanger.

[0009] In one embodiment, the domestic water tank includes a water outlet and a water return port, the domestic hot water heat exchanger includes a first water inlet and a first water outlet connected to the first water inlet, the water outlet is connected to the first water inlet, the first water outlet is connected to the water return port, and the hot water pump is arranged on a pipeline connecting the water outlet and the first water inlet.

[0010] In one embodiment, the water outlet is located at the bottom of the domestic water tank, and the water return port is located in the middle of the domestic water tank.

[0011] In one of the embodiments, there is a space between the domestic water tank and a corner inside the housing, and a pipe connecting the first water outlet to the water return port is located in the space.

[0012] In one embodiment, the outer wall of the domestic water tank is wrapped with thermal insulation cotton.

[0013] In one of the embodiments, an electric auxiliary heater is provided inside the domestic water tank.

[0014] In one of the embodiments, a temperature detector is provided inside the domestic water tank.

[0015] In one of the embodiments, a pressure relief device is provided on the top of the domestic water tank.

[0016] The utility model also constructs a heat pump hot water system, comprising any of the outdoor units described above.

[0017] By implementing the utility model, the following beneficial effects are achieved:

[0018] The utility model arranges the domestic water tank to be installed inside the shell, and the domestic hot water heat exchanger and the hot water pump to be installed inside the shell and located below the domestic water tank, so that the domestic water tank, the domestic hot water heat exchanger and the hot water pump have a high degree of integration, which is beneficial to the layout optimization of the outdoor unit, realizes a miniaturized design, and is convenient for the design and arrangement of pipelines, which is beneficial to the reduction of pipelines between the domestic hot water heat exchanger and the domestic water tank, and avoids the loss of heat and pipeline pressure during hot water transportation caused by excessively long pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 It is a schematic diagram of the overall structure of the outdoor unit of the utility model;

[0021] Figure 2 It is a front view schematic diagram of the structure of the outdoor unit of the utility model;

[0022] Figure 3 It is a back schematic diagram of the structure of the outdoor unit of the utility model;

[0023] Figure 4 It is a schematic diagram of the heat pump hot water system of the utility model;

[0024] Figure 5 It is a schematic diagram of the refrigerant flow direction of the heat pump hot water system of the utility model in which hot water is prepared through a full heat recovery mode while cooling;

[0025] Figure 6 It is a schematic diagram of the flow direction of the first refrigerant in the heat pump hot water system of the utility model for preparing hot water through the waste heat recovery mode while cooling;

[0026] Figure 7It is a schematic diagram of the flow direction of the second refrigerant in the heat pump hot water system of the utility model for preparing hot water through the waste heat recovery mode while cooling;

[0027] Figure 8 This is a schematic diagram of the flow direction of the first refrigerant in the heat pump hot water system of the utility model when preparing hot water while heating;

[0028] Fig. 9 It is a schematic diagram of the flow direction of the second refrigerant in the heat pump hot water system of the utility model when preparing hot water while heating;

[0029] Fig.10 It is a schematic diagram of the refrigerant flow direction of the heat pump hot water system of the utility model when preparing hot water purely;

[0030] Fig.11 It is a schematic diagram of the refrigerant flow direction of the heat pump hot water system of the utility model in the cooling mode;

[0031] Fig.12 It is a schematic diagram of the refrigerant flow direction of the heat pump hot water system of the utility model in the heating mode. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] like Figures 1 to 3 As shown, an embodiment of the utility model discloses an outdoor unit, including a housing 10, a domestic water tank 11, a domestic hot water heat exchanger 12 and a hot water pump 13, as follows:

[0038] The domestic water tank 11 is used to store domestic water, and the domestic water tank 11 is installed inside the housing 10 .

[0039] The domestic hot water heat exchanger 12 is used to prepare hot water by exchanging heat between a refrigerant and the water in the domestic water tank 11. The hot water pump 13 is used to provide power for the water circulation between the domestic water tank 11 and the domestic hot water heat exchanger 12. The hot water pump 13 is arranged in the water inlet pipe or the water outlet pipe of the domestic hot water heat exchanger 12. The domestic hot water heat exchanger 12 and the hot water pump 13 are installed inside the outer casing 10 and are located below the corresponding domestic water tank 11.

[0040] This embodiment makes the domestic water tank 11, the domestic hot water heat exchanger 12 and the hot water pump 13 highly integrated, which is beneficial to the layout optimization of the outdoor unit, realizes a miniaturized design, and is also convenient for the design and arrangement of pipelines, which is beneficial to reduce the pipelines between the domestic hot water heat exchanger 12 and the domestic water tank 11, avoiding the loss of heat and pipeline pressure during hot water transportation due to excessively long pipelines.

[0041] In some embodiments, the domestic water tank 11 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 domestic water tank 11, the vertical installation of the domestic water tank 11 is conducive to allowing the prepared hot water to quickly rise to the top of the domestic water tank 11, so that the hot water outlet 114 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 11 is a metal tank body, such as a stainless steel cylindrical tank body. The outer wall surface of the domestic water tank 11 is wrapped with thermal insulation cotton, such as polyurethane foam, and the heat loss of the prepared hot water is prevented by wrapping the thermal insulation cotton. 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 utility model.

[0042] In some embodiments, an electric auxiliary heater, such as an electric heating rod, is provided inside the domestic water tank 11. In order to monitor the temperature inside the domestic water tank 11 in real time, a temperature detector, such as a thermometer, is provided inside the domestic water tank 11. The electric heating rod and the thermometer are merely examples and are not intended to limit the present invention.

[0043] In some embodiments, scale is generated after water is heated, and the scale may cause corrosion to the domestic water tank 11. A water softening device and / or an anti-corrosion layer is provided inside the domestic water tank 11. 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 11, the magnesium rod releases magnesium ions, so that the water alkali and scale in the domestic water tank 11 are reduced, effectively preventing a large amount of scale from attaching to the inner wall of the domestic water tank 11, thereby avoiding corrosion to the domestic water tank 11.

[0044] In some embodiments, a pressure relief device (not shown) is provided on the top of the domestic water tank 11, and the pressure relief device is used to release the pressure inside the domestic water tank 11. 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.

[0045] In some embodiments, the domestic hot water heat exchanger 12 is a shell-and-tube heat exchanger, and the shell-and-tube heat exchanger is arranged around the periphery of the hot water pump 13 along the height direction Z of the housing 10 to fully utilize the peripheral space of the hot water pump 13. 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 11. The shell-and-tube heat exchanger here is only an example and is not intended to limit the present application.

[0046] In some embodiments, Figure 2 As shown, the outdoor unit further includes a water tank bracket 32, and the housing 10 includes a chassis 103, and the chassis 103 is used to be fixed on an external fixture, such as fixed on the ground. The water tank bracket 32 ​​is fixed on the chassis 103, and the domestic water tank 11 is installed on the water tank bracket 32 ​​so that a first accommodation space is formed between the bottom of the domestic water tank 11 and the chassis 103, and the domestic hot water heat exchanger 12 and the hot water pump 13 are located in the first accommodation space.

[0047] In some embodiments, the domestic water tank 11 extends to the first accommodating space and is fixedly connected to the chassis 103 .

[0048] In some embodiments, Figure 2 As shown, the outdoor unit further includes a first heat exchanger bracket 33 , which is fixed on the chassis 103 , and the domestic hot water heat exchanger 12 is mounted on the first heat exchanger bracket 33 .

[0049] In some embodiments, the outdoor unit further includes a first water pump bracket (not shown), and the hot water pump 13 is installed at the corresponding lower part of the domestic water tank 11 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 hot water pump 13, and the hard pipe plays a supporting role. The first water pump bracket can also be fixed to a bracket on the chassis 103, and the hot water pump 13 is installed on the first water pump bracket.

[0050] In some embodiments, the domestic water tank 11 includes a water outlet 112 and a water return port 113, the domestic hot water heat exchanger 12 includes a first water inlet 123 and a first water outlet 124 connected to the first water inlet 123, the water outlet 112 is connected to the first water inlet 123, the first water outlet 124 is connected to the water return port 113, and the hot water pump 13 is arranged on the pipeline connecting the water outlet 112 and the first water inlet 123.

[0051] In some embodiments, in order to reduce the number of pipes between the domestic hot water heat exchanger 12 and the domestic water tank 11 , the water outlet 112 is located at the bottom of the domestic water tank 11 , and the water return port 113 is located in the middle of the domestic water tank 11 .

[0052] In some embodiments, there is a space between the domestic water tank 11 and the corner inside the housing 10, and the pipe connecting the first water outlet 124 to the water return port 113 is located in the space to fully utilize the space in the corner. For example, the domestic water tank 11 is cylindrical, and the cylindrical shape here is only an example and is not intended to limit the present application.

[0053] In some embodiments, Figure 2 As shown, the outdoor unit also includes an outdoor heat exchanger 14, which is used to achieve heat exchange between the refrigerant and the outside air. The outdoor heat exchanger 14 is installed on one side of the shell 10 and has a second accommodation space below it. The domestic water tank 11 is located on the other side of the shell 10 and has the first accommodation space below it. Through this embodiment, the water tank side does not need to be inlet, and can be installed against the 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, and the installation space has wide adaptability and can save installation space. At the same time, since the outdoor heat exchanger 14 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 14 from decreasing due to insufficient ventilation space.

[0054] It should be noted here that one side and the other side inside the housing 10 refer to two sides in the length direction Y of the housing 10 .

[0055] In some embodiments, the second accommodation space and the first accommodation space have different vertical lengths, wherein the vertical length of the second accommodation space is greater than the vertical length of the first accommodation space. In this embodiment, system components with different height requirements can be placed in the second accommodation space and the first accommodation 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 11 is built into the outdoor unit is solved, thereby improving space utilization and achieving miniaturization.

[0056] Specifically, Figure 3 As shown, the height of the domestic water tank 11 is greater than the height of the outdoor heat exchanger 14, and the lowest point of the domestic water tank 11 is lower than the lowest point of the outdoor heat exchanger 14, thereby making full use of the internal space of the outdoor unit to increase the height of the domestic water tank 11 and increase the water volume.

[0057] In some embodiments, Figure 2 As shown, the outdoor unit also includes a partition 15 and a water receiving tray 16 for collecting condensed water, the partition 15 is arranged between the outdoor heat exchanger 14 and the domestic water tank 11 and is connected to the outer shell 10, the water receiving tray 16 is arranged at the bottom of the outdoor heat exchanger 14 and connects the partition 15 and the outer shell 10, the cavity on the side of the partition 15 and the water receiving tray 16 opposite to the outdoor heat exchanger 14 is "L"-shaped, and the cavity where the outdoor heat exchanger 14 is located is rectangular, and the rectangle here is only an example and is not intended to be a limitation of the present application.

[0058] In some embodiments, Figure 2As 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 14, and the fan 17 is installed on one side of the interior of the housing 10, that is, on the same side as the outdoor heat exchanger 14. For example, the outdoor heat exchanger 14 is a finned heat exchanger, which is only an example and is not intended to limit the present application.

[0059] Accordingly, if Figure 1 and Figure 3 As shown, the first side of the housing 10 corresponding to the fan 17 is provided with an air inlet 101, and the second side is provided with an air outlet 102. For example, the side of the housing 10 is provided with the air inlet 101, and the front is provided with the air outlet 102. 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.

[0060] In some embodiments, Figure 2 As shown, the water receiving pan 16 is provided with a heat dissipation hole 161, and the heat dissipation hole 161 connects the "L"-shaped cavity and the cavity where the outdoor heat exchanger 14 is located. When the fan 17 is started, the cavity where the outdoor heat exchanger 14 is located is negative pressure, and the hot air generated by the components in the "L"-shaped cavity can be discharged to the outside.

[0061] In some embodiments, Figure 2 As shown, the outdoor unit also includes an air-conditioning side heat exchanger 18, which is used to realize heat exchange between the refrigerant and water in the external terminal device 31. The air-conditioning side heat exchanger 18 is installed inside the shell 10 and is located below the outdoor side heat exchanger 14.

[0062] 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.

[0063] In some embodiments, the outdoor unit further includes a second heat exchanger bracket 34 , which is fixed to the chassis 103 , and the air-conditioning side heat exchanger 18 is installed (eg, vertically installed) on the second heat exchanger bracket 34 .

[0064] In some embodiments, Figure 3As shown, the outdoor unit also includes an air-conditioning side 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 air-conditioning side water pump 19 is used to provide power for the water circulation between the air-conditioning side heat exchanger 18 and the air-conditioning side heat exchanger 18. The air-conditioning side water pump 19 is installed inside the outer casing 10 and is located below the outdoor side heat exchanger 14.

[0065] In some embodiments, the outdoor unit further includes a second water pump bracket (not shown), and the air-conditioning side water pump 19 is installed at the corresponding lower part of the outdoor heat exchanger 14 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 air-conditioning side 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 103, and the air-conditioning side water pump 19 is installed on the second water pump bracket.

[0066] In some embodiments, Figure 4 As shown, the outdoor unit further includes a pressure buffer 35, and the pressure buffer 35 is used to adjust the water pressure between the air-conditioning side heat exchanger 18 and the external terminal device 31. The pressure buffer 35 is installed below the outdoor side heat exchanger 14. For example, the pressure buffer 35 is an expansion tank, and the expansion tank here is only an example and is not intended to limit the present application.

[0067] Specifically, the air-conditioning side water pump 19 and the pressure buffer 35 are stacked in the height direction Z of the housing 10, and the air-conditioning side 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 103, and the air-conditioning side 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.

[0068] In some embodiments, Figure 3 As shown, the outdoor unit further includes a first reversing valve 20, which is used to switch between the cooling mode and the heating mode, and the first reversing valve 20 is installed inside the housing 10 and is located below the outdoor heat exchanger 14. For example, the first reversing valve 20 is a four-way valve, which is only an example and is not intended to limit the present application.

[0069] In some embodiments, Figure 3As 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 in the cooling mode. The first one-way valve 21 and the first throttling device 22 are installed inside the shell 10 and are located below the outdoor heat exchanger 14.

[0070] The outdoor unit also includes a second one-way valve 23 and a second throttling device 24, which are used for throttling and cooling in the heating mode. The second one-way valve 23 and the second throttling device 24 are installed inside the shell 10 and are located below the outdoor heat exchanger 14.

[0071] 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.

[0072] In some embodiments, Figure 2 As shown, the outdoor unit further includes a liquid storage container 25, which is used to store liquid refrigerant. The liquid storage container 25 is installed inside the housing 10 and is located below the outdoor heat exchanger 14. Specifically, the liquid storage container 25 is installed (e.g., vertically installed) on the chassis 103.

[0073] In some embodiments, Figure 2 As shown, the outdoor unit further includes a compressor 26, and the compressor 26 is used to provide refrigerant for the domestic hot water heat exchanger 12, the outdoor heat exchanger 14 and the air-conditioning side heat exchanger 18, and the compressor 26 is installed inside the housing 10 and is located below the outdoor heat exchanger 14. Specifically, the outdoor unit further includes a compressor bracket (not shown), the compressor bracket is fixed on the chassis 103, and the compressor 26 is installed (for example, vertically installed) on the compressor bracket.

[0074] In some embodiments, Figure 2 As shown, the outdoor unit also includes a second reversing valve 27, which is used to regulate the amount of refrigerant entering the domestic hot water heat exchanger 12. The second reversing valve 27 is installed inside the shell 10 and is located below the outdoor heat exchanger 14.

[0075] The outdoor unit also includes a third reversing valve 28, which is used to switch all or at least part of the heat of the refrigerant to be exchanged in the domestic hot water heat exchanger 12. The third reversing valve 28 is installed inside the shell 10 and is located below the outdoor heat exchanger 14.

[0076] 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.

[0077] In some embodiments, Figure 2 As shown, the outdoor unit further includes a gas-liquid separator 29, which is used to separate gaseous refrigerant and liquid refrigerant, and the gas-liquid separator 29 is installed inside the housing 10 and is located below the outdoor heat exchanger 14. Specifically, the gas-liquid separator 29 is installed (e.g., vertically installed) on the chassis 103.

[0078] In some embodiments, Figure 2 As 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 hot water pump 13, the fan 17, the air-conditioning side 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. The electric control box 30 is installed inside the housing 10 and is located below the outdoor heat exchanger 14. Specifically, the electric control box 30 is installed (for example, vertically installed) on the chassis 103.

[0079] 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.

[0080] In some embodiments, Figure 2 As shown, the main vibrating parts including the domestic hot water heat exchanger 12, the hot water pump 13, the air-conditioning side heat exchanger 18, the air-conditioning side water pump 19, the liquid storage container 25, the compressor 26, the gas-liquid separator 29, the electric control box 30 and the pressure buffer 35 are fixed on the chassis 103, 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.

[0081] Through the above structural layout, the domestic hot water heat exchanger 12, the hot water pump 13, the air-conditioning side heat exchanger 18, the air-conditioning side 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 compressor 26, 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 domestic water tank 11 and the outdoor heat exchanger 14, do not occupy the space of the outdoor heat exchanger 14 or the domestic water tank 11, the space layout is reasonable, will not affect the air volume and heat exchange efficiency of the outdoor heat exchanger 14, improve the space utilization rate, and improve the integration of the outdoor unit, realize the miniaturization of the product, can complete heating, cooling and preparation of domestic hot water, without additional equipment such as hydraulic modules and domestic hot water modules, reduce the complexity of installing multiple equipment during the engineering installation process, and improve user experience.

[0082] like Figure 4 As shown, the domestic water tank 11 includes a cold water inlet 111, a water outlet 112, a return water port 113 and a hot water outlet 114; the domestic hot water heat exchanger 12 includes a refrigerant inlet 121, a refrigerant outlet 122 connected to the refrigerant inlet 121, a first water inlet 123 and a first water outlet 124 connected to the first water inlet 123; the outdoor heat exchanger 14 includes a first refrigerant port 141 and a second refrigerant port 142 connected to the first refrigerant port 141; the air conditioning side heat exchanger 18 includes a third refrigerant port 181, a fourth refrigerant port 182 connected to the third refrigerant port 181, and a fourth refrigerant port 183 connected to the third refrigerant port 183. The media port 182, the second water inlet 183 and the second water outlet 184 connected to the second water inlet 183; the first reversing valve 20 includes a first valve port 201, a second valve port 202, a third valve port 203 and a fourth valve port 204; the liquid storage container 25 includes a first interface 251, a second interface 252 and a third interface 253; the compressor 26 includes an inlet 261 and an outlet 262; the second reversing valve 27 includes a fifth valve port 271, a sixth valve port 272 and a seventh valve port 273; the third reversing valve 28 includes an eighth valve port 281, a ninth valve port 282 and a tenth valve port 283.

[0083] like Figure 4As 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 121 of the domestic hot water heat exchanger 12, 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 122 of the domestic hot water heat exchanger 12 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 112 of the domestic water tank 11 is connected to the first water inlet 123 of the domestic hot water heat exchanger 12 through the hot water pump 13, and the first water outlet 124 of the domestic hot water heat exchanger 12 is connected to the return water port 113 of the domestic water tank 11; the second valve port 202 of the first reversing valve 20 is connected to the first refrigerant port 141 of the outdoor heat exchanger 14; the second refrigerant port 142 of the outdoor heat exchanger 14 is connected to the first refrigerant port 141 of the outdoor heat exchanger 14 through the first one-way valve 21. The second interface 252 of the liquid storage container 25 is connected, 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 142 of the outdoor heat exchanger 14 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. 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 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 air-conditioning side 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 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.

[0084] 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.

[0085] In different situations, different valve ports will be connected, as follows:

[0086] like Figure 5 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 121 of the domestic hot water heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 11 in the domestic hot water heat exchanger 12 and becomes a medium-temperature liquid refrigerant after preparing hot water. The medium-temperature liquid refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the 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. The liquid storage container 2 The medium-temperature liquid refrigerant output from the third interface 253 of 5 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, and 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, and 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 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 12 is connected to the domestic water tank 11, so that all the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 14 can be recovered and utilized during summer cooling, avoiding all the heat being wasted in the heat exchange between the outdoor heat exchanger 14 and the air. The recovered heat is exchanged with the water in the domestic water tank 11 in the domestic hot water heat exchanger 12 to quickly prepare hot water, improve energy utilization, and increase the speed of hot water production.

[0087] like Figure 6As 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 121 of the domestic hot water heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 11 in the domestic hot water heat exchanger 12 and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the 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 141 of the outdoor heat exchanger 14. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 14 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 142 of the device 14 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 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 12 is connected to the domestic water tank 11, so that at least part of the condensation heat originally used for heat exchange with the air in the outdoor heat exchanger 14 can be recovered and utilized during summer cooling, thereby avoiding the waste of all heat in the heat exchange between the outdoor heat exchanger 14 and the air. The recovered heat is exchanged with the water in the domestic water tank 11 in the domestic hot water heat exchanger 12 to prepare hot water, thereby improving energy utilization.

[0088] Specifically, Figure 6 and Figure 5 The difference between the shown embodiments is that Figure 6In order to recycle at least part of the condensation heat originally used for heat exchange with air by the outdoor heat exchanger 14, Figure 5 The purpose is to recover and utilize all the condensation heat originally used by the outdoor heat exchanger 14 for heat exchange with the air.

[0089] 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 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 121 of the domestic hot water heat exchanger 12 through the fifth valve port 271 and the sixth valve port 272 of the second reversing valve 27, and enters the refrigerant inlet 121 of the domestic hot water heat exchanger 12 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 141, the high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 11 in the domestic hot water heat exchanger 12, and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the 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 141 of the outdoor heat exchanger 14. 1, the medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 14 to become a medium-temperature liquid refrigerant, the medium-temperature liquid refrigerant output from the second refrigerant port 142 of the outdoor heat exchanger 14 passes through the first one-way valve 21 and enters the 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 air-conditioning side heat exchanger 1 8, 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 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 12 is connected to the domestic water tank 11, so that at least part of the condensation heat originally used for heat exchange with the air by the outdoor heat exchanger 14 is recycled during summer cooling, avoiding the waste of all heat in the outdoor heat exchanger 14 and the air. The recycled heat is exchanged with the water in the domestic water tank 11 in the domestic hot water heat exchanger 12 to prepare hot water, thereby improving energy utilization.

[0090] Specifically, Figure 7 and Figure 6 The difference between the shown embodiments is that Figure 7 In the embodiment shown, an additional refrigerant path enters the outdoor heat exchanger 14 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 second valve port 202 of the first reversing valve 20, so that the amount of refrigerant entering the domestic hot water heat exchanger 12 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 12 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.

[0091] like Figure 8As 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 121 of the domestic hot water heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 11 in the domestic hot water heat exchanger 12, and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the 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 water in the terminal device 31 in the air-conditioning side heat exchanger 18. After the circulating 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 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 141 of the outdoor heat exchanger 14 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 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth. The domestic hot water heat exchanger 12 is connected to the domestic water tank 11, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0092] 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 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 121 of the domestic hot water heat exchanger 12 after passing through the fifth valve port 271 and the sixth valve port 272 of the second reversing valve 27, and enters the fourth refrigerant port 182 of 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. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 11 in the domestic hot water heat exchanger 12, and becomes a medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 enters the air-conditioning side heat exchanger 1 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 of 8, 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 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 and becomes a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant outputted from the first refrigerant port 141 of the outdoor heat exchanger 14 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 of the compressor 26 through the gas-liquid separator 29, for a reciprocating cycle. The domestic hot water heat exchanger 12 is connected to the domestic water tank 11, so that hot water can be prepared while heating in winter, thereby improving energy utilization.

[0093] Specifically, Fig. 9 and Figure 8 The difference between the shown embodiments is that Fig. 9In 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 12 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 12 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.

[0094] like Fig.10 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 121 of the domestic hot water heat exchanger 12. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 11 in the domestic hot water heat exchanger 12 to prepare hot water. After preparing hot water, it becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the refrigerant outlet 122 of the domestic hot water heat exchanger 12 passes through the eighth valve port 281 and the tenth valve port 283 of the third reversing valve 28 and then enters the liquid storage container 25. The medium-temperature liquid refrigerant outputted from the first interface 251 and 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 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant outputted from the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the 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 of the compressor 26, and circulates back and forth. The domestic hot water heat exchanger 12 is connected to the domestic water tank 11, so that all the heat from the compressor 26 can be used alone in the domestic hot water heat exchanger 12 for heat exchange with the water in the domestic water tank 11, 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 18, and the heat exchange efficiency is higher.

[0095] like Fig.11As 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 141 of the outdoor heat exchanger 14. The high-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 14 to become a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 142 of the outdoor heat exchanger 14 passes through the first one-way valve 21 and then enters the second interface 252 of the liquid storage container 25. The third interface 252 of the liquid storage container 25 The medium-temperature liquid refrigerant outputted from the air conditioner 3 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, and 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, and the low-temperature gaseous refrigerant outputted 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 of the compressor 26 through the gas-liquid separator 29, and circulates back and forth.

[0096] like Fig.12As 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 liquid storage container 25. The third interface 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 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 141 of the outdoor heat exchanger 14 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 of the compressor 26 through the gas-liquid separator 29, and the cycle repeats.

[0097] 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.

[0098] By implementing the utility model, the following beneficial effects are achieved:

[0099] The utility model arranges the domestic water tank 11 to be installed inside the shell 10, and the domestic hot water heat exchanger 12 and the hot water pump 13 to be installed inside the shell 10 and located below the domestic water tank 11, so that the domestic water tank 11, the domestic hot water heat exchanger 12 and the hot water pump 13 have a high degree of integration, which is beneficial to the layout optimization of the outdoor unit, realizes a miniaturized design, and is convenient for the design and arrangement of pipelines, which is beneficial to the reduction of pipelines between the domestic hot water heat exchanger 12 and the domestic water tank 11, and avoids the loss of heat and pipeline pressure during hot water transportation caused by excessively long pipelines.

[0100] 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; A domestic water tank, which is used to store domestic water and is installed inside the housing; A domestic hot water heat exchanger and a hot water pump, wherein the domestic hot water heat exchanger is used to prepare hot water by exchanging heat between a refrigerant and the water in the domestic water tank, and the hot water pump is used to provide power for the water circulation between the domestic water tank and the domestic hot water heat exchanger. The domestic hot water heat exchanger and the hot water pump are installed inside the outer shell and are located below the corresponding domestic water tank.

2. The outdoor unit according to claim 1, characterized in that: The domestic hot water heat exchanger is a shell and tube heat exchanger.

3. The outdoor unit according to claim 1, characterized in that: The domestic water tank includes a water outlet and a water return port, the domestic hot water heat exchanger includes a first water inlet and a first water outlet connected to the first water inlet, the water outlet is connected to the first water inlet, the first water outlet is connected to the water return port, and the hot water pump is arranged on a pipeline connecting the water outlet and the first water inlet.

4. The outdoor unit according to claim 3, characterized in that: The water outlet is located at the bottom of the domestic water tank, and the water return port is located in the middle of the domestic water tank.

5. The outdoor unit according to claim 3, characterized in that: There is a space between the domestic water tank and a corner inside the shell, and the pipeline connecting the first water outlet to the water return port is located in the space.

6. The outdoor unit according to claim 1, characterized in that: The outer wall surface of the domestic water tank is wrapped with thermal insulation cotton.

7. The outdoor unit according to claim 1, characterized in that: An electric auxiliary heater is arranged inside the domestic water tank.

8. The outdoor unit according to claim 1, characterized in that: A temperature detector is arranged inside the domestic water tank.

9. The outdoor unit according to claim 1, characterized in that: A pressure relief device is arranged on the top of the domestic water tank.

10. A 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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