WO2025232745A1 - Outdoor main unit - Google Patents

Abstract

The present application discloses an outdoor main unit. The outdoor main unit comprises a housing, and the interior of the housing is used for accommodating a compressor, an outdoor side heat exchanger, a throttling module, an air conditioner side heat exchanger, an air conditioner side water pump, a pressure buffer, a water storage tank, a heat recovery heat exchanger, and a heat recovery heat exchanger water pump. The compressor is connected to at least two of the outdoor side heat exchanger, the air conditioner side heat exchanger, and the heat recovery heat exchanger by means of pipes. The throttling module is connected to at least two of the outdoor side heat exchanger, the air conditioner side heat exchanger, and the heat recovery heat exchanger by means of pipes. The air conditioner side water pump is connected to the air conditioner side heat exchanger, and the pressure buffer is connected to the air conditioner side heat exchanger. The water storage tank is connected to the heat recovery heat exchanger, and the heat recovery heat exchanger water pump is connected to the heat recovery heat exchanger.

Description

Outdoor unit Technical Field

This application relates to the field of heat pump technology, and more particularly to an outdoor unit.

Background Technology

Dual-generation or triple-generation heat pump systems typically have components such as hydraulic modules and buffer tanks installed outside the main unit. However, this places certain demands on the footprint of these components, requiring additional space to install the buffer tanks and hydraulic modules. The installation process is complex, which hinders the widespread adoption of dual-generation or triple-generation systems.

Summary of the Invention

Therefore, it is necessary to provide an outdoor unit to address the aforementioned technical problems.

The technical solution adopted by this application to solve its technical problem is: constructing an outdoor unit, including:

The housing contains a compressor, an outdoor heat exchanger, a throttling module, an air conditioning heat exchanger, an air conditioning water pump, a pressure damper, a water storage tank, a heat recovery heat exchanger, and a heat recovery heat exchanger water pump.

The compressor is used to compress refrigerant, and the compressor is connected to at least two of the outdoor heat exchanger, the air conditioning heat exchanger and the heat recovery heat exchanger through pipelines.

The throttling module is used to achieve throttling expansion of the refrigerant. The throttling module is connected to at least two of the outdoor heat exchanger, the air conditioning heat exchanger and the heat recovery heat exchanger through pipelines.

The outdoor heat exchanger is used to achieve heat exchange between the refrigerant and the outside air.

The air conditioning side heat exchanger is used to realize heat exchange between the refrigerant and the water in the external terminal equipment.

The air conditioning side water pump is connected to the air conditioning side heat exchanger, and the air conditioning side water pump is used to provide power for water circulation between the air conditioning side heat exchanger and the external terminal equipment;

The pressure buffer is connected to the air conditioning side heat exchanger, and the pressure buffer is used to regulate the water pressure between the air conditioning side heat exchanger and the external terminal equipment;

The water storage tank is connected to the heat recovery heat exchanger, which is used to prepare domestic water by exchanging heat between the refrigerant and the water in the water storage tank.

The heat recovery heat exchanger water pump is connected to the heat recovery heat exchanger and is used to provide power for water circulation between the heat recovery heat exchanger and the water storage tank.

In one embodiment, the water storage tank and the outdoor heat exchanger are installed on both sides of the interior length of the outer casing, and the water storage tank is vertically arranged.

In one embodiment, the height of the water storage tank is greater than the height of the outdoor heat exchanger.

In one embodiment, the heat recovery heat exchanger is installed below the corresponding water storage tank.

In one embodiment, the heat recovery heat exchanger pump is installed below the corresponding water storage tank.

In one embodiment, the housing includes a chassis;

The outdoor unit also includes:

A water tank support is fixed to the chassis, and a water storage tank is installed on the water tank support to form an accommodating space between the bottom of the water storage tank and the chassis. The heat recovery heat exchanger and the heat recovery heat exchanger pump are located within the accommodating space.

In one embodiment, the housing includes a chassis;

The outdoor unit also includes:

The first water pump bracket is used to mount the heat recovery heat exchanger water pump inside the outer casing.

In one embodiment, the housing includes a chassis, and the heat recovery heat exchanger is a shell-and-tube heat exchanger;

The outdoor unit also includes:

The first heat exchanger bracket is fixed to the chassis, and the shell-and-tube heat exchanger is installed on the first heat exchanger bracket and is arranged around the periphery of the heat recovery heat exchanger pump.

In one embodiment, the housing includes a chassis;

The outdoor unit also includes:

The second heat exchanger bracket is fixed to the chassis, and the air conditioning side heat exchanger is installed on the second heat exchanger bracket.

In one embodiment, the outdoor unit further includes:

The second water pump bracket is used to mount the air conditioning side water pump inside the housing.

In one embodiment, the compressor, the throttling module, the air conditioning side heat exchanger, the air conditioning side water pump, and the pressure damper are installed below the corresponding outdoor side heat exchanger.

In one embodiment, the air conditioning side water pump and the pressure damper are stacked in the height direction inside the housing, and the air conditioning side water pump and the pressure damper are located at one end in the width direction inside the housing.

In one embodiment, the outdoor heat exchanger includes a first refrigerant port and a second refrigerant port connected to the first refrigerant port;

The heat recovery heat exchanger includes a refrigerant inlet and a refrigerant outlet connected to the refrigerant inlet;

The air conditioning side heat exchanger includes a third refrigerant port and a fourth refrigerant port connected to the third refrigerant port;

At least one of the refrigerant inlet, the first refrigerant port, and the fourth refrigerant port is connected to the outlet of the compressor via a pipeline;

The refrigerant outlet is connected via a pipeline to at least one of the throttling module, the first refrigerant port, and the fourth refrigerant port;

The second refrigerant port is connected to the third refrigerant port through the throttling module;

The compressor inlet is connected to the first refrigerant port and/or the fourth refrigerant port via a pipeline.

In one embodiment, the heat recovery heat exchanger includes a first water inlet and a first water outlet connected to the first water inlet;

The air conditioning side heat exchanger includes a second water inlet and a second water outlet connected to the second water inlet;

The water storage tank is connected to the first water inlet and the first water outlet, respectively.

The heat recovery heat exchanger water pump is installed on the pipeline between the first water inlet and the water storage tank or on the pipeline between the first water outlet and the water storage tank;

The air conditioning side water pump is installed on the pipeline between the second water inlet and the external terminal device or on the pipeline between the second water outlet and the external terminal device;

The pressure buffer is located on the pipeline between the second water inlet and the external terminal device, or on the pipeline between the second water outlet and the external terminal device.

In one embodiment, the heat recovery heat exchanger includes a first water inlet and a first water outlet connected to the first water inlet;

The water storage tank includes an outlet and an inlet;

Wherein, the water outlet is connected to the first water inlet, and the first water outlet is connected to the return water inlet;

There is a space between the water storage tank and the corner inside the outer shell, and the pipe connecting the first water outlet to the return water inlet is located in the space.

In one embodiment, the outdoor unit further includes:

An electrical control box is installed inside the outer casing and located below the outdoor heat exchanger. The electrical control box is located on the side away from the water tank and at one end of the width direction inside the outer casing.

By implementing this application, the following beneficial effects can be achieved:

This application integrates the air conditioning side water pump and the pressure buffer from the hydraulic module of a traditional tri-generation equipment into the outdoor unit, so that the outdoor unit already has the function of a hydraulic module, simplifying the hydraulic module components. Therefore, it can reduce the number of components and facilitate the miniaturization design of the equipment.

Meanwhile, the compressor, the outdoor heat exchanger, the throttling module, the air conditioning heat exchanger, the water storage tank, the heat recovery heat exchanger, and the heat recovery heat exchanger water pump are all integrated into the outdoor unit, which can complete heating, cooling, and domestic hot water production without the need for additional hydraulic modules, domestic hot water modules, and other components. This improves the product's integration, reduces the complexity of installing multiple components during engineering installation, and enhances the user experience.

Attached Figure Description

The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

Figure 1 is a schematic diagram of the overall structure of the outdoor unit described in this application;

Figure 2 is a schematic diagram showing the positions of the first and second cavities inside the outer casing of the outdoor unit described in this application. The dashed lines in the figure represent virtual boundaries, and the first space, the second space, and the water tank space are connected.

Figure 3 is a front view of the structure of the outdoor unit described in this application;

Figure 4 is a rear view of the structural composition of the outdoor unit described in this application;

Figure 5 is a schematic diagram of the heat pump system described in this application;

Figure 6 is a schematic diagram of the refrigerant flow direction in which the heat pump system described in this application generates hot water through a total heat recovery mode while simultaneously cooling;

Figure 7 is a schematic diagram of the flow direction of the first refrigerant in the heat pump system described in this application, which generates hot water through waste heat recovery while cooling.

Figure 8 is a schematic diagram of the flow direction of the second refrigerant in the heat pump system described in this application, which generates hot water through waste heat recovery while cooling.

Figure 9 is a schematic diagram of the flow direction of the first refrigerant in the heat pump system described in this application, which generates hot water while heating.

Figure 10 is a schematic diagram of the flow direction of the second refrigerant in the heat pump system described in this application, which generates hot water while heating.

Figure 11 is a schematic diagram of the refrigerant flow direction of the heat pump system described in this application when it is purely preparing hot water;

Figure 12 is a schematic diagram of the refrigerant flow direction of the heat pump system described in this application in cooling mode;

Figure 13 is a schematic diagram of the refrigerant flow direction of the heat pump system described in this application in heating mode.

Detailed Implementation

To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "located in," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

It should be noted that the vertical direction is defined by the height direction Z of the outer shell 10, and the horizontal direction is defined by the length direction Y of the outer shell 10, also known as the transverse direction.

As shown in Figures 1 to 4, one embodiment of this application discloses an outdoor unit, including a housing 10. The housing 10 is used to house a water storage tank 11, an outdoor heat exchanger 12, a heat recovery heat exchanger 13, an air conditioning heat exchanger 14, an air conditioning water pump 15, a pressure buffer 16, a compressor 17, a heat recovery heat exchanger water pump 18, and a throttling module, as detailed below:

The compressor 17 is used to compress refrigerant. The compressor 17 is connected to at least two of the outdoor heat exchanger 12, the air conditioning heat exchanger 14 and the heat recovery heat exchanger 13 through pipelines. The connection relationship can be seen in the following various modes.

The throttling module is used to achieve throttling expansion of the refrigerant. The throttling module is connected to at least two of the outdoor heat exchanger 12, the air conditioning heat exchanger 14 and the heat recovery heat exchanger 13 through pipelines. The connection relationship can be seen in the following various modes.

The outdoor heat exchanger 12 is used to realize the heat exchange between the refrigerant and the outside air, and the air conditioning side heat exchanger 14 is used to realize the heat exchange between the refrigerant and the water in the external terminal equipment 35.

The air conditioning side water pump 15 is connected to the air conditioning side heat exchanger 14. The air conditioning side water pump 15 is used to provide power for water circulation between the air conditioning side heat exchanger 14 and the external terminal device 35. The air conditioning side water pump 15 is installed in the inlet pipe or outlet pipe of the air conditioning side heat exchanger 14.

The pressure buffer 16 is connected to the air conditioning side heat exchanger 14. The pressure buffer 16 is used to adjust the water pressure between the air conditioning side heat exchanger 14 and the external terminal device 35. The pressure buffer 16 is installed in the inlet or outlet water pipe of the air conditioning side heat exchanger 14.

The water storage tank 11 is connected to the heat recovery heat exchanger 13. The heat recovery heat exchanger 13 is used to prepare domestic water by exchanging heat with the water in the water storage tank 11 through a refrigerant. The water storage tank 11 is used to store domestic water.

The heat recovery heat exchanger water pump 18 is connected to the heat recovery heat exchanger 13. The heat recovery heat exchanger water pump 18 is used to provide power for water circulation between the heat recovery heat exchanger 13 and the water storage tank. The heat recovery heat exchanger water pump 18 is installed in the inlet or outlet water pipe of the heat recovery heat exchanger 13.

In this embodiment, the air conditioning side water pump 15 and the pressure buffer 16 in the hydraulic module of a traditional tri-generation equipment are integrated into the outdoor unit, so that the outdoor unit already has the function of a hydraulic module, simplifying the hydraulic module components. Therefore, the number of components can be reduced, which is conducive to the miniaturization design of the equipment.

Meanwhile, the water storage tank 11, the outdoor heat exchanger 12, the heat recovery heat exchanger 13, the air conditioning heat exchanger 14, the compressor 17, the heat recovery heat exchanger water pump 18, and the throttling module are all integrated into the outdoor unit, which can complete heating, cooling, and domestic hot water production without the need for additional hydraulic modules, domestic hot water modules, and other components for matching. This improves the integration of the product, reduces the complexity of installing multiple components during the engineering installation process, and enhances the user experience.

In some embodiments, as shown in FIG3, the water storage tank 11 and the outdoor heat exchanger 12 are installed on both sides of the inner length direction Y of the outer casing 10, and the water storage tank 11 is vertically arranged.

In this embodiment, since the water storage tank 11 and the outdoor heat exchanger 12 are installed on both sides of the length Y direction inside the outer casing 10, the water tank side does not require air intake and can be installed against a wall, making it suitable for installation spaces with poor ventilation. This replaces the previous method of leaving gaps at both ends with a gap on only one side, thus broadening the adaptability of installation space and saving installation space. Simultaneously, since the outdoor heat exchanger 12 is installed separately, sufficient ventilation can be ensured on the heat exchanger side, guaranteeing heat exchange efficiency and preventing a decrease in heat exchange efficiency due to insufficient ventilation space.

Since the density of hot water is lower than that of cold water, installing the water storage tank 11 vertically is more advantageous than installing it horizontally, as it allows the prepared hot water to rise quickly to the top of the water storage tank 11. This makes it easier for the hot water outlet 114 at the top to quickly obtain high-temperature hot water, thereby increasing the water discharge volume, discharge rate, and hot water supply capacity.

In some embodiments, the water storage tank 11 is a metal tank, such as a stainless steel cylindrical tank. The outer wall of the water storage tank 11 is wrapped with insulating cotton (not shown), such as polyurethane foam, to prevent heat loss from the prepared hot water. The stainless steel cylindrical tank, the insulating cotton, and the polyurethane foam mentioned here are merely examples and are not intended to limit this application; other materials may also be used.

In some embodiments, the water storage tank 11 is equipped with an electric auxiliary heater (not shown), such as an electric heating rod. To monitor the temperature inside the water storage tank 11 in real time, a temperature detector (not shown), such as a thermometer, is installed inside the water storage tank 11. The electric heating rod and thermometer mentioned here are merely examples and are not intended to limit this application; other types may also be used.

In some embodiments, scale is produced when water is heated, and the scale can corrode the water storage tank 11. A water softening device (not shown) and/or an anti-corrosion layer (not shown) are provided inside the water storage 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 water storage tank 11, the magnesium rod will release magnesium ions, which slows down the formation of water scale and limescale in the water storage tank 11, effectively preventing a large amount of limescale from adhering to the inner wall of the water storage tank 11 and avoiding corrosion of the water storage tank 11.

In some embodiments, the top of the water storage tank 11 is provided with a pressure relief device (not shown), which is used to release the pressure inside the water storage tank 11. For example, the pressure relief device is an air vent valve. The air vent valve mentioned here is only an example and is not intended to limit this application; other devices may also be used.

In some embodiments, as shown in FIG3, the heat recovery heat exchanger 13 is installed below the corresponding water storage tank 11, which facilitates the design and layout of the pipeline, reduces the pipeline between the heat recovery heat exchanger 13 and the water storage tank 11, and avoids the loss of heat and pipeline pressure during the hot water transportation process due to excessively long pipelines.

In some embodiments, as shown in FIG3, the heat recovery heat exchanger pump 18 is installed below the corresponding water storage tank 11.

In some embodiments, as shown in FIG3, the air conditioning side heat exchanger 14, the air conditioning side water pump 15, the pressure buffer 16, the compressor 17 and the throttling module are installed below the outdoor side heat exchanger 12.

In some embodiments, as shown in FIG3, the outdoor unit further includes a water tank bracket 19, and the outer casing 10 includes a chassis 103 for fixing to external fasteners, such as the ground. The water tank bracket 19 is fixed to the chassis 103, and the water storage tank 11 is installed on the water tank bracket 19 such that an accommodating space is formed between the bottom of the water storage tank 11 and the chassis 103. The heat recovery heat exchanger 13 and the heat recovery heat exchanger water pump 18 are located within the accommodating space.

In some embodiments, as shown in FIG3, the outdoor unit further includes a first heat exchanger bracket 20, which is fixed on the chassis 103, and the heat recovery heat exchanger 13 is installed on the first heat exchanger bracket 20.

For example, the heat recovery heat exchanger 13 is a shell-and-tube heat exchanger, and the shell-and-tube heat exchanger is arranged around the heat recovery heat exchanger pump 18 along the height direction Z of the outer shell 10 to make full use of the surrounding space of the heat recovery heat exchanger pump 18. The internal piping of the shell-and-tube heat exchanger can carry both refrigerant and water as heat exchange media. The refrigerant and water are separated by copper pipes and exchange heat to provide hot water to the water storage tank 11. The shell-and-tube heat exchanger described here is merely an example and is not intended to limit this application; other types are also possible.

In some embodiments, the outdoor unit further includes a first water pump bracket (not shown), through which the heat recovery heat exchanger water pump 18 is mounted inside the housing 10, specifically below the water storage tank 11. For example, the first water pump bracket can be a rigid pipe connecting the inlet and outlet ends of the heat recovery heat exchanger water pump 18, with the rigid pipe providing support. Alternatively, the first water pump bracket can be a bracket fixed to the chassis 103, with the heat recovery heat exchanger water pump 18 mounted on the first water pump bracket.

In some embodiments, the water storage tank 11 includes an outlet 112 and a return outlet 113, the heat recovery heat exchanger 13 includes a first water inlet 133 and a first water outlet 134 connected to the first water inlet 133, the outlet 112 is connected to the first water inlet 133, the first water outlet 134 is connected to the return outlet 113, and the heat recovery heat exchanger pump 18 is located on the pipeline connecting the outlet 112 and the first water inlet 133, or the heat recovery heat exchanger pump 18 is located on the pipeline connecting the first water outlet 134 and the return outlet 113.

In some embodiments, in order to reduce the piping between the heat recovery heat exchanger 13 and the water storage tank 11, the outlet 112 is located at the bottom of the water storage tank 11, and the return outlet 113 is located in the middle of the water storage tank 11.

In some embodiments, there is a space between the water storage tank 11 and the corner inside the outer casing 10, and the pipe connecting the first water outlet 134 to the return water inlet 113 is located in the space to make full use of the corner space. For example, the water storage tank 11 is cylindrical; however, the cylindrical shape here is merely an example and is not intended to limit this application, and other shapes are also possible.

In some embodiments, as shown in Figures 2 and 3, the outdoor heat exchanger 12 and the water storage tank 11 are arranged in a stepped manner inside the outer casing 10, as shown in Figure 2, forming a first space 1021 and a second space 1022 with different vertical lengths in the lower region inside the outer casing 10. The first space 1021 is located below the outdoor heat exchanger 12, and the second space 1022 is located below the water storage tank 11. The vertical length of the first space 1021 is greater than the vertical length of the second space 1022.

This embodiment allows system components with different height requirements to be placed in the first space 1021 and the second space 1022, making the internal space layout of the outdoor unit reasonable. This solves the problem of insufficient internal space of the outdoor unit when the water storage tank 11 is built into it, improving space utilization and achieving miniaturization.

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

In some embodiments, the water storage tank 11 extends into the second space 1022 and is fixedly connected to the chassis 103.

In some embodiments, as shown in FIG2, a first cavity 101 and a second cavity 102 are formed inside the outer casing 10. The outdoor heat exchanger 12 is located in the first cavity 101, and the water storage tank 11, the heat recovery heat exchanger 13, the air conditioning side heat exchanger 14, the air conditioning side water pump 15, the pressure buffer 16, the compressor 17, the heat recovery heat exchanger water pump 18, and the throttling module are located in the second cavity 102. For example, the first cavity 101 is rectangular, and the second cavity 102 is "L"-shaped. The rectangular and "L" shapes mentioned here are merely examples and are not intended to limit this application; other shapes are also possible.

The first space 1021, the second space 1022, and the water tank space 1023 on the side where the water storage tank 11 is located constitute the second cavity 102.

Specifically, as shown in Figure 3, the outdoor unit also includes a partition 21, which is disposed between the outdoor heat exchanger 12 and the water storage tank 11 along the height direction Z of the outer casing 10 and is connected to the outer casing 10.

The outdoor unit also includes a water collection tray 22 for collecting condensate. The water collection tray 22 is disposed at the bottom of the outdoor heat exchanger 12 along the length Y direction of the outer casing 10 and is connected to the partition 21 and the outer casing 10. The partition 21, the water collection tray 22, and the outer casing 10 together define the first cavity 101 and the second cavity 102.

In some embodiments, the outdoor unit further includes a compressor bracket (not shown), which is fixed to the chassis 103, and the compressor 17 is mounted (e.g., vertically) on the compressor bracket.

In some embodiments, as shown in FIG3, the outdoor unit further includes a fan 23, which drives external air to exchange heat with the outdoor heat exchanger 12. The fan 23 is installed inside the housing 10 on one side, i.e., on the same side as the outdoor heat exchanger 12, and is located in the first cavity 101. For example, the outdoor heat exchanger 12 is a finned heat exchanger. The finned heat exchanger mentioned here is only an example and is not intended to limit this application; other types are also possible.

Accordingly, as shown in Figures 1 and 4, the first side of the outer casing 10 corresponding to the fan 23 is provided with an air inlet 104 and the second side is provided with an air outlet 105. For example, the side of the outer casing 10 is provided with the air inlet 104 and the front is provided with the air outlet 105. The side and the front are just examples and are not intended to limit this application. They can be other, such as any two of the front, the side and the back.

In some embodiments, as shown in FIG3, the water receiving tray 22 is provided with heat dissipation holes 221, which connect the first cavity 101 and the second cavity 102. When the fan 23 is started, the first cavity 101 is under negative pressure, which can exhaust the hot air generated by the components in the second cavity 102 to the outside.

In some embodiments, as shown in FIG3, the outdoor unit further includes a second heat exchanger bracket 24, which is fixed on the chassis 103. The air conditioning side heat exchanger 14 is installed on the second heat exchanger bracket 24 and is vertically arranged.

For example, the air conditioning side heat exchanger 14 is a plate heat exchanger, the air conditioning side water pump 15 is installed in the inlet or outlet water pipe of the air conditioning side heat exchanger 14, and the external terminal device 35 may include a fan coil and/or underfloor heating installed indoors. The plate heat exchanger, the fan coil and the underfloor heating mentioned here are just examples and are not intended to limit this application. They may also be other types.

In some embodiments, the outdoor unit further includes a second water pump bracket (not shown), through which the air conditioning side water pump 15 is mounted inside the housing 10, specifically below the outdoor heat exchanger 12. For example, the second water pump bracket can be a rigid pipe connecting the inlet and outlet ends of the air conditioning side water pump 15, with the rigid pipe providing support. Alternatively, the second water pump bracket can be a bracket fixed to the chassis 103, with the air conditioning side water pump 15 mounted on the second water pump bracket.

In some embodiments, as shown in FIG4, the air conditioning side water pump 15 and the pressure buffer 16 are stacked in the height direction Z of the housing 10, and the air conditioning side water pump 15 and the pressure buffer 16 are located at one end in the width direction X inside the housing 10, while the air conditioning side heat exchanger 14 is located at the other end in the width direction X inside the housing 10. For example, the pressure buffer 16 is an expansion tank, installed (e.g., horizontally) on the chassis 103, and the air conditioning side water pump 15 is located above the pressure buffer 16. It should be noted that horizontal installation means extending along the length and width plane of the housing 10. The expansion tank mentioned here is only an example and is not intended to limit this application; other types are also possible.

In some embodiments, as shown in FIG4, the outdoor unit further includes a first reversing valve 25. The first reversing valve 25 is used to switch between cooling mode and heating mode. The first reversing valve 25 is connected to the outdoor heat exchanger 12, the air conditioning heat exchanger 14, and the compressor 17. Alternatively, the first reversing valve 25 is connected to the outdoor heat exchanger 12, the air conditioning heat exchanger 14, the heat recovery heat exchanger 13, and the compressor 17. The first reversing valve 25 is installed inside the housing 10 and located below the outdoor heat exchanger 12, i.e., in the second cavity 102. For example, the first reversing valve 25 is a four-way valve. The four-way valve mentioned here is only an example and is not intended to limit this application; other valves are also possible.

In some embodiments, as shown in Figures 4 and 5, the throttling module includes a first throttling device 27 and a second throttling device 29, wherein the second end of the first throttling device 27 is connected to the first end of the second throttling device 29, that is, the first throttling device 27 and the second throttling device 29 are connected in series.

In this configuration, the first end of the first throttling device 27 is connected to the air conditioning-side heat exchanger 14, and the second end of the second throttling device 29 is connected to the outdoor-side heat exchanger 12. Alternatively, the first end of the first throttling device 27 is connected to the air conditioning-side heat exchanger 14, and the heat recovery heat exchanger 13 is connected to the pipeline between the second end of the first throttling device 27 and the first end of the second throttling device 29. Alternatively, the second end of the second throttling device 29 is connected to the outdoor-side heat exchanger 12, and the heat recovery heat exchanger 13 is connected to the pipeline between the second end of the first throttling device 27 and the first end of the second throttling device 29. Alternatively, the first end of the first throttling device 27 is connected to the air conditioning-side heat exchanger 14, the second end of the second throttling device 29 is connected to the outdoor-side heat exchanger 12, and the heat recovery heat exchanger 13 is connected to the pipeline between the second end of the first throttling device 27 and the first end of the second throttling device 29.

In some embodiments, the throttling module further includes a first one-way valve 26 and a second one-way valve 28. The inlet of the first one-way valve 26 is connected to the second end of the second throttling device 29, and the outlet of the first one-way valve 26 is connected to the first end of the second throttling device 29, i.e., the first one-way valve 26 and the second throttling device 29 are connected in parallel. The inlet of the second one-way valve 28 is connected to the first end of the first throttling device 27, and the outlet of the second one-way valve 28 is connected to the second end of the first throttling device 27, i.e., the second one-way valve 28 and the first throttling device 27 are connected in parallel. The first one-way valve 26 and the first throttling device 27 are used for throttling and cooling in cooling mode, and the second one-way valve 28 and the second throttling device 29 are used for throttling and cooling in heating mode and pure hot water mode.

For example, the first throttling device 27 and the second throttling device 29 are electronic expansion valves or thermal expansion valves. The electronic expansion valve and the thermal expansion valve mentioned here are just examples and are not intended to limit this application. They can also be other types.

In some embodiments, as shown in FIG3, the outdoor unit further includes a liquid storage container 30 for storing liquid refrigerant. The liquid storage container 30 is installed inside the outer casing 10 and located below the outdoor heat exchanger 12, i.e., in the second cavity 102. Specifically, the liquid storage container 30 is installed (e.g., vertically) on the chassis 103.

In some embodiments, as shown in FIG3, the outdoor unit further includes a second reversing valve 31. The second reversing valve 31 is used to regulate the amount of refrigerant entering the heat recovery heat exchanger 13 after the refrigerant comes out of the compressor 17. The second reversing valve 31 is connected to the compressor 17 and the heat recovery heat exchanger 13, and the second reversing valve 31 is connected to the outdoor side heat exchanger 12 and/or the air conditioning side heat exchanger 14. The second reversing valve 31 is installed inside the housing 10 and located below the outdoor side heat exchanger 12, that is, in the second cavity 102.

The outdoor unit also includes a third reversing valve 32, which is used to switch all or at least part of the heat of the refrigerant to be exchanged in the heat recovery heat exchanger 13. The third reversing valve 32 is connected to the heat recovery heat exchanger 13 and is also connected to the outdoor heat exchanger 12 and/or the air conditioning heat exchanger 14. The third reversing valve 32 is installed inside the housing 10 and is located below the outdoor heat exchanger 12, that is, in the second cavity 102.

For example, the second reversing valve 31 and the third reversing valve 32 are three-way valves. The three-way valve mentioned here is only an example and is not intended to limit this application. Other valves may also be used.

In some embodiments, as shown in FIG3, the outdoor unit further includes a gas-liquid separator 33, which is used to separate gaseous refrigerant and liquid refrigerant. The gas-liquid separator 33 is located at the inlet 171 of the compressor 17 and is installed inside the outer casing 10 and below the outdoor heat exchanger 12, i.e., in the second cavity 102. Specifically, the gas-liquid separator 33 is installed (e.g., vertically) on the chassis 103.

In some embodiments, as shown in FIG3, the outdoor unit further includes an electrical control box 34. The electrical control box 34 is used to control various electrical control components within the housing 10, such as the compressor 17, the heat recovery heat exchanger water pump 18, the fan 23, the air conditioning side water pump 15, the first reversing valve 25, the first throttling device 27, the second throttling device 29, the second reversing valve 31, and the third reversing valve 32. The electrical control box 34 is installed inside the housing 10 and located below the outdoor side heat exchanger 12, i.e., in the second cavity 102. The electrical control box 34 is located on the side away from the water tank 11 and at one end in the width direction X inside the housing 10. Specifically, the electrical control box 34 is installed (e.g., vertically) on the chassis 103.

During installation, installers only need to connect the cables to the wiring terminals of the electrical control box 34 located below the outdoor heat exchanger 12. During maintenance, maintenance personnel only need to replace the corresponding components in the electrical control box 34 located below the outdoor heat exchanger 12 to complete the maintenance, which improves the convenience of installing and maintaining the outdoor unit.

Furthermore, the main control board of the electrical control box 34 is provided with a heat sink 341, which corresponds to the heat dissipation hole 221. For example, the heat sink 341 is a heat dissipation fin. The heat dissipation fin is only an example and is not intended to limit this application. Other types are also possible.

In some embodiments, as shown in Figures 3 and 4, the main vibration components, such as the heat recovery heat exchanger 13, the heat recovery heat exchanger water pump 18, the air conditioning side heat exchanger 14, the air conditioning side water pump 15, the liquid storage container 30, the compressor 17, the gas-liquid separator 33, the electrical control box 34, and the pressure buffer 16, are fixed to the chassis 103. This results in a low center of gravity and balanced weight for the outdoor unit, improving the stability of the unit and reducing vibration and noise.

With the above structural layout, the heat recovery heat exchanger 13, the heat recovery heat exchanger water pump 18, the air conditioning side heat exchanger 14, the air conditioning side water pump 15, the first reversing valve 25, the first check valve 26, the first throttling device 27, the second check valve 28, the second throttling device 29, the liquid storage container 30, the compressor 17, the second reversing valve 31, the third reversing valve 32, the gas-liquid separator 33, the electrical control box 34, and the pressure buffer 16 are located between the water storage tank 11 and the chamber. The space below the outer heat exchanger 12 does not occupy the space of the outdoor heat exchanger 12 or the water storage tank 11. The space layout is reasonable and will not affect the air volume or heat exchange efficiency of the outdoor heat exchanger 12, thus improving space utilization. It also improves the integration of the outdoor unit, realizes product miniaturization, and can complete heating, cooling and domestic hot water production without the need for additional hydraulic modules, domestic hot water modules and other components for matching. This reduces the complexity of installing multiple components during the engineering installation process and improves the user experience.

As shown in Figure 5, the water storage tank 11 includes a cold water inlet 111, a water outlet 112, a return water outlet 113, and a hot water outlet 114; the heat recovery 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 outdoor heat exchanger 12 includes a first refrigerant port 121 and a second refrigerant port 122 connected to the first refrigerant port 121; the air conditioning side heat exchanger 14 includes a third refrigerant port 141 and a fourth refrigerant port 142 connected to the third refrigerant port 141. The first reversing valve 25 includes a media port 142, a second water inlet 143, and a second water outlet 144 connected to the second water inlet 143; the first reversing valve 25 includes a first valve port 251, a second valve port 252, a third valve port 253, and a fourth valve port 254; the liquid storage container 30 includes a first interface 301, a second interface 302, and a third interface 303; the compressor 17 includes an inlet 171 and an outlet 172; the second reversing valve 31 includes a fifth valve port 311, a sixth valve port 312, and a seventh valve port 313; the third reversing valve 32 includes an eighth valve port 321, a ninth valve port 322, and a tenth valve port 323.

In some embodiments, at least one of the refrigerant inlet 131, the first refrigerant port 121 and the fourth refrigerant port 142 is connected to the outlet 172 of the compressor 17 via a pipeline, and the connection relationship can be seen in the various modes described below.

The refrigerant outlet 132 is connected to at least one of the throttling module, the first refrigerant port 121 and the fourth refrigerant port 142 via a pipeline, and the connection relationship can be seen in the following various modes.

The second refrigerant port 122 is connected to the third refrigerant port 141 through the throttling module, and the connection relationship can be seen in the following various modes.

The first refrigerant port 121 and/or the fourth refrigerant port 142 are connected to the inlet 171 of the compressor 17 via pipelines, and the connection relationship can be seen in the following various modes.

The water storage tank 11 is connected to the first water inlet 133 and the first water outlet 134 respectively. The heat recovery heat exchanger water pump 18 is located on the pipeline between the first water inlet 133 and the water storage tank 11 or on the pipeline between the first water outlet 134 and the water storage tank 11. The air conditioning side water pump 15 is located on the pipeline between the second water inlet 143 and the external terminal device 35 or on the pipeline between the second water outlet 144 and the external terminal device 35. The pressure buffer 16 is located on the pipeline between the second water inlet 143 and the external terminal device 35 or on the pipeline between the second water outlet 144 and the external terminal device 35.

In some embodiments, as shown in FIG5, the connection relationship between the above components is as follows: the outlet 172 of the compressor 17 is connected to the fifth valve port 311 of the second reversing valve 31; the sixth valve port 312 of the second reversing valve 31 is connected to the refrigerant inlet 131 of the heat recovery heat exchanger 13; the seventh valve port 313 of the second reversing valve 31 is connected to the first valve port 251 of the first reversing valve 25; the refrigerant outlet 132 of the heat recovery heat exchanger 13 is connected to the eighth valve port 321 of the third reversing valve 32; and the ninth valve port 322 of the third reversing valve 32 is connected to the first valve port 251 of the first reversing valve 25. The tenth port 323 of the third reversing valve 32 is connected to the first port 301 of the liquid storage container 30; the outlet 112 of the water storage tank 11 is connected to the first water inlet 133 of the heat recovery heat exchanger 13 via the heat recovery heat exchanger pump 18; the first water outlet 134 of the heat recovery heat exchanger 13 is connected to the return port 113 of the water storage tank 11; the second port 252 of the first reversing valve 25 is connected to the first refrigerant port 121 of the outdoor heat exchanger 12; the second refrigerant port 122 of the outdoor heat exchanger 12 is connected to the first one-way valve 26. The first one-way valve 26 is connected to the second port 302 of the liquid storage container 30, with the conduction direction of the first one-way valve 26 facing the second port 302 of the liquid storage container 30. The second refrigerant port 122 of the outdoor heat exchanger 12 is also connected to the second port 302 of the liquid storage container 30 via the second throttling device 29. The third refrigerant port 141 of the air conditioning side heat exchanger 14 is connected to the third port 303 of the liquid storage container 30 via the first throttling device 27, and the third refrigerant port 141 of the air conditioning side heat exchanger 14 is also connected to the third port 303 of the liquid storage container 30 via the second one-way valve 28. The first one-way valve 28 is connected to the second one-way valve 28 via the third interface 303 of the liquid storage container 30. The fourth refrigerant port 142 of the air conditioning side heat exchanger 14 is connected to the fourth valve port 254 of the first reversing valve 25. The third valve port 253 of the first reversing valve 25 is connected to the inlet 171 of the compressor 17 via the gas-liquid separator 33. The outlet of the external terminal device 35 is connected to the second water inlet 143 of the air conditioning side heat exchanger 14 via the air conditioning side water pump 15. The second water outlet 144 of the air conditioning side heat exchanger 14 is connected to the inlet of the external terminal device 35. It should be noted that the orientation of the first one-way valve 26 and the second one-way valve 28 refers to the direction of refrigerant flow, not the orientation of their spatial positions.

It should also be noted that, apart from the refrigerant flow relationship between the inlet and outlet connections, the connections between other interfaces, between interfaces and components, or between components are merely physical structural connections and do not uniquely limit the connectivity and refrigerant flow direction. Furthermore, the pipe connections mentioned can be direct connections or connections via other components.

A heat pump is a device that uses the principle of heat transfer to transfer heat energy from a low-temperature heat source to a high-temperature heat source. One embodiment of this application discloses a heat pump system, including the outdoor unit and the terminal device 35 described in the above embodiment, wherein the outdoor unit will not be described in detail here.

Completely, different situations will correspond to different connectivity, as follows:

As shown in Figure 6, when producing domestic hot water through total heat recovery in cooling mode, the fifth valve port 311 of the second reversing valve 31 is connected to the sixth valve port 312, the eighth valve port 321 of the third reversing valve 32 is connected to the tenth valve port 323, the fourth valve port 254 of the first reversing valve 25 is connected to the third valve port 253, the first throttling device 27 is open, and the second throttling device 29 is closed. That is, when hot water needs to be prepared quickly in cooling mode, the high-temperature gaseous refrigerant output from the outlet 172 of the compressor 17 first passes through the fifth valve port 311 and the sixth valve port 312 of the second reversing valve 31 and then enters the refrigerant inlet 131 of the heat recovery heat exchanger 13. The high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 11 in the heat recovery heat exchanger 13, and after preparing hot water, it becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the refrigerant outlet 132 of the heat recovery heat exchanger 13 passes through the eighth valve port 321 and the tenth valve port 323 of the third reversing valve 32 and then enters the first port 301 of the liquid storage container 30. The medium-temperature liquid refrigerant output from interface 303 is throttled and cooled by the first throttling device 27, becoming a lower-temperature liquid refrigerant. It then enters the third refrigerant port 141 of the air conditioning side heat exchanger 14. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 35 in the air conditioning side heat exchanger 14. After absorbing the heat from the circulating water, the low-temperature liquid refrigerant evaporates into a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the fourth refrigerant port 142 of the air conditioning side heat exchanger 14 passes through the fourth valve port 254 and the third valve port 253 of the first reversing valve 25 and then returns to the inlet 171 of the compressor 17 through the gas-liquid separator 33, repeating the cycle. The heat recovery heat exchanger 13 is connected to the water storage tank 11, so that all the condensation heat originally used by the outdoor heat exchanger 12 for heat exchange with the air can be recovered and utilized during summer cooling, avoiding the waste of all heat when the outdoor heat exchanger 12 exchanges heat with the air. The recovered heat is exchanged with the water in the water storage tank 11 in the heat recovery heat exchanger 13 to quickly produce hot water, improve energy utilization, and increase the speed of hot water production.

As shown in Figure 7, when waste heat is recovered to produce domestic hot water in cooling mode, the fifth valve port 311 of the second reversing valve 31 is connected to the sixth valve port 312, the eighth valve port 321 of the third reversing valve 32 is connected to the ninth valve port 322, the first valve port 251 of the first reversing valve 25 is connected to the second valve port 252, the fourth valve port 254 of the first reversing valve 25 is connected to the third valve port 253, the first throttling device 27 is open, and the second throttling device 29 is closed. That is, when hot water needs to be prepared in cooling mode, the high-temperature gaseous refrigerant output from the outlet 172 of the compressor 17 first passes through the fifth valve port 311 and the sixth valve port 312 of the second reversing valve 31 and then enters the refrigerant inlet 131 of the heat recovery heat exchanger 13. The high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 11 in the heat recovery 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 heat recovery heat exchanger 13 passes through the eighth valve port 321 and the ninth valve port 322 of the third reversing valve 32 and the first valve port 251 and the second valve port 252 of the first reversing valve 25 and then enters the first refrigerant port 121 of the outdoor heat exchanger 12. The medium-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 12 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 122 enters the second port 302 of the liquid storage container 30 after passing through the first one-way valve 26. The medium-temperature liquid refrigerant output from the third port 303 of the liquid storage container 30 becomes a lower-temperature liquid refrigerant after being throttled and cooled by the first throttling device 27. Then it enters the third refrigerant port 141 of the air conditioning side heat exchanger 14. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 35 in the air conditioning side heat exchanger 14. After absorbing the heat from the circulating water, the low-temperature liquid refrigerant evaporates into a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the fourth refrigerant port 142 of the air conditioning side heat exchanger 14 passes through the fourth valve port 254 and the third valve port 253 of the first reversing valve 25 and then returns to the inlet 171 of the compressor 17 through the gas-liquid separator 33, repeating the cycle. The heat recovery heat exchanger 13 is connected to the water storage tank 11, so that at least part of the condensation heat of the outdoor heat exchanger 12, which was originally used to exchange heat with the air, can be recovered and reused during summer cooling, avoiding the waste of all heat when the outdoor heat exchanger 12 exchanges heat with the air. The recovered heat is exchanged with the water in the water storage tank 11 in the heat recovery heat exchanger 13 to produce hot water and improve energy utilization.

Specifically, the difference between the embodiments shown in Figure 7 and Figure 6 is that Figure 7 shows the recovery and reuse of at least a portion of the condensation heat originally used by the outdoor heat exchanger 12 for heat exchange with the air, while Figure 6 shows the recovery and reuse of all the condensation heat originally used by the outdoor heat exchanger 12 for heat exchange with the air.

As shown in Figure 8, when waste heat is recovered to produce domestic hot water in cooling mode, the fifth valve port 311 of the second reversing valve 31 is connected to the sixth valve port 312 and the seventh valve port 313 respectively, the eighth valve port 321 of the third reversing valve 32 is connected to the ninth valve port 322, the first valve port 251 of the first reversing valve 25 is connected to the second valve port 252, the fourth valve port 254 of the first reversing valve 25 is connected to the third valve port 253, the first throttling device 27 is open, and the second throttling device 29 is closed. That is, when hot water needs to be prepared in cooling mode, the high-temperature gaseous refrigerant output from the outlet 172 of the compressor 17 passes through the fifth valve port 311 and the sixth valve port 312 of the second reversing valve 31 and enters the refrigerant inlet 131 of the heat recovery heat exchanger 13. Another path passes through the fifth valve port 311 and the seventh valve port 313 of the second reversing valve 31, and the first valve port 251 and the second valve port 252 of the first reversing valve 25, and enters the first refrigerant inlet 131 of the outdoor heat exchanger 12. At refrigerant port 121, high-temperature gaseous refrigerant exchanges heat with water in the water storage tank 11 in the heat recovery heat exchanger 13, producing hot water that becomes medium-temperature gaseous refrigerant. The medium-temperature gaseous refrigerant output from refrigerant outlet 132 of the heat recovery heat exchanger 13 passes through the eighth and ninth valve ports 321 and 322 of the third reversing valve 32, and the first valve port 251 and second valve port 252 of the first reversing valve 25, before entering the first refrigerant port 121 of the outdoor heat exchanger 12. After the gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 12, it becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 122 of the outdoor heat exchanger 12 passes through the first one-way valve 26 and enters the second port 302 of the liquid storage container 30. The medium-temperature liquid refrigerant output from the third port 303 of the liquid storage container 30 passes through the first throttling device 27 and is cooled down, becoming a lower-temperature liquid refrigerant, and then enters the third port 303 of the air conditioning side heat exchanger 14. At refrigerant port 141, low-temperature liquid refrigerant exchanges heat with circulating water in the terminal device 35 in the air conditioning side heat exchanger 14. The low-temperature liquid refrigerant absorbs heat from the circulating water and evaporates into low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the fourth refrigerant port 142 of the air conditioning side heat exchanger 14 passes through the fourth valve port 254 and the third valve port 253 of the first reversing valve 25, and then returns to the inlet 171 of the compressor 17 via the gas-liquid separator 33, repeating the cycle. The heat recovery heat exchanger 13 is connected to the water storage tank 11, thereby recovering at least a portion of the condensation heat originally used for heat exchange with the air in the outdoor side heat exchanger 12 during summer cooling, avoiding the waste of all heat exchanged between the outdoor side heat exchanger 12 and the air. The recovered heat is exchanged with water in the water storage tank 11 in the heat recovery heat exchanger 13 to produce hot water, improving energy efficiency.

Specifically, the difference between the embodiments shown in Figure 8 and Figure 7 is that in the embodiment shown in Figure 8, an additional refrigerant path enters the outdoor heat exchanger 12 after passing through the fifth valve port 311 and the seventh valve port 313 of the second reversing valve 31 and the first valve port 251 and the second valve port 252 of the first reversing valve 25. This allows for better control of the amount of refrigerant entering the heat recovery heat exchanger 13. Furthermore, the path where the refrigerant from the compressor 17 directly reaches the first reversing valve 25 is guaranteed to be in a gaseous state, while the path through the heat recovery heat exchanger 13 may contain liquid refrigerant after heat exchange. The pure gaseous refrigerant ensures that the first reversing valve 25 has sufficient pressure differential for reversing, thus reducing pressure loss in the refrigerant pipeline. Additionally, the second reversing valve 31 is less susceptible to impurities, ensuring stable system operation.

As shown in Figure 9, when producing domestic hot water in heating mode, the fifth valve port 311 of the second reversing valve 31 is connected to the sixth valve port 312, the eighth valve port 321 of the third reversing valve 32 is connected to the ninth valve port 322, the first valve port 251 of the first reversing valve 25 is connected to the fourth valve port 254, the second valve port 252 of the first reversing valve 25 is connected to the third valve port 253, the first throttling device 27 is closed, and the second throttling device 29 is open. That is, when hot water needs to be prepared in heating mode, the high-temperature gaseous refrigerant output from the outlet 172 of the compressor 17 first passes through the fifth valve port 311 and the sixth valve port 312 of the second reversing valve 31 and then enters the refrigerant inlet 131 of the heat recovery heat exchanger 13. The high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 11 in the heat recovery heat exchanger 13, and after preparing hot water, it becomes medium-temperature gaseous refrigerant. The medium-temperature gaseous refrigerant output from the refrigerant outlet 132 of the heat recovery heat exchanger 13 passes through the eighth valve port 321 and the ninth valve port 322 of the third reversing valve 32 and the first valve port 251 and the fourth valve port 254 of the first reversing valve 25 and then enters the fourth refrigerant port 142 of the air conditioning side heat exchanger 14. The medium-temperature gaseous refrigerant exchanges heat with the circulating water in the terminal device 35 in the air conditioning side heat exchanger 14. After heat exchange, the refrigerant becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the third refrigerant port 141 of the air conditioning side heat exchanger 14 passes through the second one-way valve 28 and enters the third port 303 of the liquid storage container 30. The medium-temperature liquid refrigerant output from the second port 302 of the liquid storage container 30 is throttled and cooled by the second throttling device 29, becoming a lower-temperature low-temperature liquid refrigerant. It then enters the second refrigerant port 122 of the outdoor side heat exchanger 12. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor side heat exchanger 12, becoming a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 121 of the outdoor side heat exchanger 12 passes through the second valve port 252 and the third valve port 253 of the first reversing valve 25 and then returns to the inlet 171 of the compressor 17 through the gas-liquid separator 33, repeating the cycle. The heat recovery heat exchanger 13 is connected to the water storage tank 11, thereby enabling the production of hot water while providing heating in winter, improving energy utilization.

As shown in Figure 10, when producing domestic hot water in heating mode, the fifth valve port 311 of the second reversing valve 31 is connected to the sixth valve port 312 and the seventh valve port 313 respectively, the eighth valve port 321 of the third reversing valve 32 is connected to the ninth valve port 322, the first valve port 251 of the first reversing valve 25 is connected to the fourth valve port 254, the second valve port 252 of the first reversing valve 25 is connected to the third valve port 253, the first throttling device 27 is closed, and the second throttling device 29 is open. That is, when hot water needs to be prepared in heating mode, the high-temperature gaseous refrigerant output from the outlet 172 of the compressor 17 passes through the fifth valve port 311 and the sixth valve port 312 of the second reversing valve 31 and enters the refrigerant inlet 131 of the heat recovery heat exchanger 13. Alternatively, it passes through the fifth valve port 311 and the seventh valve port 313 of the second reversing valve 31 and the first valve port 251 and the fourth valve port 254 of the first reversing valve 25 and enters the air conditioning side heat exchanger. At the fourth refrigerant port 142 of the heat recovery heat exchanger 13, the high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 11 to prepare hot water, becoming a medium-temperature gaseous refrigerant. The medium-temperature gaseous refrigerant output from the refrigerant outlet 132 of the heat recovery heat exchanger 13 passes through the eighth valve port 321 and the ninth valve port 322 of the third reversing valve 32 and the first valve port 251 and the fourth valve port 254 of the first reversing valve 25 before entering the fourth refrigerant port 14 of the air conditioning side heat exchanger 14. At refrigerant port 142, the medium-temperature gaseous refrigerant exchanges heat with the circulating water in the terminal device 35 in the air conditioning side heat exchanger 14 and becomes medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the third refrigerant port 141 of the air conditioning side heat exchanger 14 passes through the second one-way valve 28 and enters the third interface 303 of the liquid storage container 30. The medium-temperature liquid refrigerant output from the second interface 302 of the liquid storage container 30 passes through the second throttling device 29 and becomes a lower-temperature liquid refrigerant. Then it enters the second refrigerant port 122 of the outdoor side heat exchanger 12. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor side heat exchanger 12 and becomes low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 121 of the outdoor side heat exchanger 12 passes through the second valve port 252 and the third valve port 253 of the first reversing valve 25 and then returns to the inlet 171 of the compressor 17 through the gas-liquid separator 33, and the cycle repeats. The heat recovery heat exchanger 13 is connected to the water storage tank 11, so that hot water can be produced while heating is provided in winter, thereby improving energy utilization.

Specifically, the difference between the embodiments shown in Figure 10 and Figure 9 is that in the embodiment shown in Figure 10, an additional path passes through the fifth valve port 311 and the seventh valve port 313 of the second reversing valve 31 and the first valve port 251 and the fourth valve port 254 of the first reversing valve 25 before entering the air conditioning side heat exchanger 14. This allows for better control of the amount of refrigerant entering the heat recovery heat exchanger 13. Furthermore, the path where the refrigerant from the compressor 17 directly reaches the first reversing valve 25 can be guaranteed to be in a gaseous state. In contrast, the path where the refrigerant passes through the heat recovery heat exchanger 13 may contain liquid refrigerant after heat exchange. The pure gaseous refrigerant ensures that the first reversing valve 25 has sufficient pressure differential for reversing, thus reducing pressure loss in the refrigerant pipeline. Additionally, the second reversing valve 31 is less susceptible to impurities, ensuring stable system operation.

As shown in Figure 11, in pure hot water mode, the fifth valve port 311 of the second reversing valve 31 is connected to the sixth valve port 312, the eighth valve port 321 of the third reversing valve 32 is connected to the tenth valve port 323, the second valve port 252 of the first reversing valve 25 is connected to the third valve port 253, the first throttling device 27 is closed, and the second throttling device 29 is open. That is, when only hot water needs to be produced, the high-temperature gaseous refrigerant output from the outlet 172 of the compressor 17 first passes through the fifth valve port 311 and the sixth valve port 312 of the second reversing valve 31 and then enters the refrigerant inlet 131 of the heat recovery heat exchanger 13. The high-temperature gaseous refrigerant exchanges heat with the water in the water storage tank 11 in the heat recovery heat exchanger 13 to produce hot water. After producing hot water, it becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the refrigerant outlet 132 of the heat recovery heat exchanger 13 passes through the eighth valve port 321 and the tenth valve port 323 of the third reversing valve 32 and then enters the first port 3 of the liquid storage container 30. 01. The medium-temperature liquid refrigerant output from the second port 302 of the liquid storage container 30 is throttled and cooled by the second throttling device 29, becoming a lower-temperature liquid refrigerant. It then enters the second refrigerant port 122 of the outdoor heat exchanger 12. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 12, becoming a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 121 of the outdoor heat exchanger 12 passes through the second valve port 252 and the third valve port 253 of the first reversing valve 25, and then returns to the inlet 171 of the compressor 17 via the gas-liquid separator 33, repeating the cycle. The heat recovery heat exchanger 13 is connected to the water storage tank 11, allowing all the heat from the compressor 17 to be used specifically for heat exchange with the water in the water storage tank 11 within the heat recovery heat exchanger 13. This targeted energy utilization shortens the refrigerant loop when producing hot water, eliminating the need to pass through the air conditioning side heat exchanger 14, resulting in higher heat exchange efficiency.

As shown in Figure 12, in cooling mode, the fifth valve port 311 of the second reversing valve 31 is connected to the seventh valve port 313, the first valve port 251 of the first reversing valve 25 is connected to the second valve port 252, the fourth valve port 254 of the first reversing valve 25 is connected to the third valve port 253, the first throttling device 27 is open, and the second throttling device 29 is closed. That is, when cooling is performed alone in summer, the high-temperature gaseous refrigerant output from outlet 172 of compressor 17 passes through the fifth valve port 311 and seventh valve port 313 of the second reversing valve 31 and the first valve port 251 and second valve port 252 of the first reversing valve 25 before entering the first refrigerant port 121 of outdoor heat exchanger 12. The high-temperature gaseous refrigerant condenses and releases heat in the outdoor heat exchanger 12, becoming a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the second refrigerant port 122 of outdoor heat exchanger 12 passes through the first one-way valve 26 before entering the second port 302 of liquid storage container 30. The third port 303 of liquid storage container 30... The output medium-temperature liquid refrigerant is throttled and cooled by the first throttling device 27, becoming a lower-temperature liquid refrigerant. It then enters the third refrigerant port 141 of the air conditioning side heat exchanger 14. The low-temperature liquid refrigerant exchanges heat with the circulating water in the terminal device 35 in the air conditioning side heat exchanger 14. After absorbing the heat from the circulating water, the low-temperature liquid refrigerant evaporates into a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the fourth refrigerant port 142 of the air conditioning side heat exchanger 14 passes through the fourth valve port 254 and the third valve port 253 of the first reversing valve 25 and then returns to the inlet 171 of the compressor 17 through the gas-liquid separator 33, repeating the cycle.

As shown in Figure 13, in heating mode, the fifth valve port 311 of the second reversing valve 31 is connected to the seventh valve port 313, the first valve port 251 of the first reversing valve 25 is connected to the fourth valve port 254, the second valve port 252 of the first reversing valve 25 is connected to the third valve port 253, the first throttling device 27 is closed, and the second throttling device 29 is open. That is, when heating is used alone in winter, the high-temperature gaseous refrigerant output from outlet 172 of compressor 17 passes through the fifth valve port 311 and seventh valve port 313 of the second reversing valve 31 and the first valve port 251 and fourth valve port 254 of the first reversing valve 25 before entering the fourth refrigerant port 142 of the air conditioning side heat exchanger 14. The high-temperature gaseous refrigerant exchanges heat with the circulating water in the terminal device 35 in the air conditioning side heat exchanger 14 and becomes a medium-temperature liquid refrigerant. The medium-temperature liquid refrigerant output from the third refrigerant port 141 of the air conditioning side heat exchanger 14 passes through the second one-way valve 28 before entering the first refrigerant port 142 of the liquid storage container 30. The medium-temperature liquid refrigerant output from the second port 302 of the liquid storage container 30 is throttled and cooled by the second throttling device 29, becoming a lower-temperature liquid refrigerant. It then enters the second refrigerant port 122 of the outdoor heat exchanger 12. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 12, becoming a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 121 of the outdoor heat exchanger 12 passes through the second valve port 252 and the third valve port 253 of the first reversing valve 25 and then returns to the inlet 171 of the compressor 17 through the gas-liquid separator 33, repeating the cycle.

It should be noted that the terms high, medium, and low temperatures mentioned above are only relative descriptions, and gaseous refrigerant can also refer to a two-phase state of gas and liquid or a gaseous state, which is not limited here.

By implementing this application, the following beneficial effects can be achieved:

This application integrates the air conditioning side water pump 15 and the pressure buffer 16 from the hydraulic module of a traditional tri-generation equipment into the outdoor unit, so that the outdoor unit already has the function of a hydraulic module, simplifying the hydraulic module components. Therefore, the number of components can be reduced, which is conducive to the miniaturization design of the equipment.

Meanwhile, the water storage tank 11, the outdoor heat exchanger 12, the heat recovery heat exchanger 13, the air conditioning heat exchanger 14, the compressor 17, the heat recovery heat exchanger water pump 18, and the throttling module are all integrated into the outdoor unit, which can complete heating, cooling, and domestic hot water production without the need for additional hydraulic modules, domestic hot water modules, and other components for matching. This improves the integration of the product, reduces the complexity of installing multiple components during the engineering installation process, and enhances the user experience.

It is understood that the above embodiments only illustrate some implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application's patent. It should be noted that for those skilled in the art, without departing from the concept of this application, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of this application, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of this application should fall within the coverage of the claims of this application.

Claims (16)

An outdoor unit, comprising: The housing contains a compressor, an outdoor heat exchanger, a throttling module, an air conditioning heat exchanger, an air conditioning water pump, a pressure damper, a water storage tank, a heat recovery heat exchanger, and a heat recovery heat exchanger water pump. The compressor is used to compress refrigerant, and the compressor is connected to at least two of the outdoor heat exchanger, the air conditioning heat exchanger and the heat recovery heat exchanger through pipelines. The throttling module is used to achieve throttling expansion of the refrigerant. The throttling module is connected to at least two of the outdoor heat exchanger, the air conditioning heat exchanger and the heat recovery heat exchanger through pipelines. The outdoor heat exchanger is used to achieve heat exchange between the refrigerant and the outside air. The air conditioning side heat exchanger is used to realize heat exchange between the refrigerant and the water in the external terminal equipment. The air conditioning side water pump is connected to the air conditioning side heat exchanger, and the air conditioning side water pump is used to provide power for water circulation between the air conditioning side heat exchanger and the external terminal equipment; The pressure buffer is connected to the air conditioning side heat exchanger, and the pressure buffer is used to regulate the water pressure between the air conditioning side heat exchanger and the external terminal equipment; The water storage tank is connected to the heat recovery heat exchanger, which is used to prepare domestic water by exchanging heat between the refrigerant and the water in the water storage tank. The heat recovery heat exchanger water pump is connected to the heat recovery heat exchanger and is used to provide power for water circulation between the heat recovery heat exchanger and the water storage tank. According to claim 1, the outdoor unit is provided with the water storage tank and the outdoor heat exchanger installed on both sides of the inner length direction of the outer casing, and the water storage tank is vertically arranged. According to claim 2, the height of the outdoor unit is greater than the height of the outdoor heat exchanger. According to claim 1, the outdoor unit is installed below the corresponding water storage tank. According to claim 1 or 4, the outdoor unit's heat recovery heat exchanger water pump is installed below the corresponding water storage tank. According to claim 1, the outdoor unit, the housing includes a chassis; The outdoor unit also includes: A water tank support is fixed to the chassis, and a water storage tank is installed on the water tank support to form an accommodating space between the bottom of the water storage tank and the chassis. The heat recovery heat exchanger and the heat recovery heat exchanger pump are located within the accommodating space. According to claim 1, the outdoor unit, the housing includes a chassis; The outdoor unit also includes: The first water pump bracket is used to mount the heat recovery heat exchanger water pump inside the outer casing. According to claim 1, the outdoor unit includes a chassis, and the heat recovery heat exchanger is a shell-and-tube heat exchanger. The outdoor unit also includes: The first heat exchanger bracket is fixed to the chassis, and the shell-and-tube heat exchanger is installed on the first heat exchanger bracket and is arranged around the periphery of the heat recovery heat exchanger pump. According to claim 1, the outdoor unit, the housing includes a chassis; The outdoor unit also includes: The second heat exchanger bracket is fixed to the chassis, and the air conditioning side heat exchanger is installed on the second heat exchanger bracket. The outdoor unit according to claim 1 further includes: The second water pump bracket is used to mount the air conditioning side water pump inside the housing. According to claim 1, the outdoor unit, the compressor, the throttling module, the air conditioning side heat exchanger, the air conditioning side water pump, and the pressure buffer are installed below the corresponding outdoor side heat exchanger. According to claim 1, the air conditioning side water pump and the pressure buffer are stacked in the height direction inside the housing, and the air conditioning side water pump and the pressure buffer are located at one end in the width direction inside the housing. According to claim 1, the outdoor unit, the outdoor heat exchanger includes a first refrigerant port and a second refrigerant port connected to the first refrigerant port; The heat recovery heat exchanger includes a refrigerant inlet and a refrigerant outlet connected to the refrigerant inlet; The air conditioning side heat exchanger includes a third refrigerant port and a fourth refrigerant port connected to the third refrigerant port; At least one of the refrigerant inlet, the first refrigerant port, and the fourth refrigerant port is connected to the outlet of the compressor via a pipeline; The refrigerant outlet is connected via a pipeline to at least one of the throttling module, the first refrigerant port, and the fourth refrigerant port; The second refrigerant port is connected to the third refrigerant port through the throttling module; The compressor inlet is connected to the first refrigerant port and/or the fourth refrigerant port via a pipeline. According to claim 1, the outdoor unit, the heat recovery heat exchanger includes a first water inlet and a first water outlet connected to the first water inlet; The air conditioning side heat exchanger includes a second water inlet and a second water outlet connected to the second water inlet; The water storage tank is connected to the first water inlet and the first water outlet, respectively. The heat recovery heat exchanger water pump is installed on the pipeline between the first water inlet and the water storage tank or on the pipeline between the first water outlet and the water storage tank; The air conditioning side water pump is installed on the pipeline between the second water inlet and the external terminal device or on the pipeline between the second water outlet and the external terminal device; The pressure buffer is located on the pipeline between the second water inlet and the external terminal device, or on the pipeline between the second water outlet and the external terminal device. According to claim 1, the outdoor unit, the heat recovery heat exchanger includes a first water inlet and a first water outlet connected to the first water inlet; The water storage tank includes an outlet and an inlet; Wherein, the water outlet is connected to the first water inlet, and the first water outlet is connected to the return water inlet; There is a space between the water storage tank and the corner inside the outer shell, and the pipe connecting the first water outlet to the return water inlet is located in the space. The outdoor unit according to claim 2, further comprising: An electrical control box is installed inside the outer casing and located below the outdoor heat exchanger. The electrical control box is located on the side away from the water tank and at one end of the width direction inside the outer casing.