Heat pump system

Abstract

The utility model provides a heat pump system which comprises a shell, a plate heat exchanger, an electric heater, a water pump, an expansion water tank, a water inlet pipe, a water outlet pipe, a refrigerant inlet and a refrigerant outlet, and the plate heat exchanger, the electric heater, the water pump, the expansion water tank, the water inlet pipe, the water outlet pipe, the refrigerant inlet and the refrigerant outlet are contained in the shell. The plate heat exchanger, the water pump and the water outlet pipe are arranged on one side of the water inlet pipe in the length direction of the water inlet pipe, the electric heater, the expansion water tank, the refrigerant inlet and the refrigerant outlet are arranged on the other side of the water inlet pipe in the length direction of the water inlet pipe, and the electric heater is arranged above the expansion water tank. The water outlet pipe is connected with a water outlet of the water pump, and the refrigerant inlet and the refrigerant outlet are connected with the plate heat exchanger. According to the heat pump system, by optimizing the layout of the plate heat exchanger, the electric heater, the water pump, the expansion water tank, the water inlet pipe, the water outlet pipe, the refrigerant inlet and the refrigerant outlet in the shell, the whole structure is more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat pump system. Background Art

[0002] A heat pump system is a highly efficient thermal system that uses external heat sources (such as geothermal, hydrothermal, air-heated, or solar) to convert low-temperature heat into high-temperature heat to meet heating and hot water needs. The main components of a heat pump system include a chassis, electric heater, plate heat exchanger, water pump, and expansion tank. These components are connected by copper pipes and housed within a housing.

[0003] However, due to the large number of components in the heat pump system, the existing heat pump system is relatively complex and the layout of the components is relatively unreasonable, which results in the pipes used to connect the various components being too long and having too many bends, which in turn leads to a large shell volume and low space utilization. Utility Model Content

[0004] The purpose of this application is to solve the above problems and provide a heat pump system to solve the technical problems that the layout of components of the heat pump system is not compact enough and consumables are relatively large.

[0005] To achieve the above-mentioned object, the present application provides a heat pump system, comprising a housing, a plate heat exchanger, an electric heater, a water pump, an expansion water tank, and a water inlet pipe, wherein the housing has an open receiving chamber, the plate heat exchanger, the electric heater, the water pump, the expansion water tank, and the water inlet pipe are received in the receiving chamber, the water inlet pipe is arranged in the middle of the receiving chamber along the length direction of the housing, the plate heat exchanger and the water pump are arranged on one side of the water inlet pipe and are arranged in sequence along the length direction of the water inlet pipe toward its pipe opening, the electric heater and the expansion water tank are arranged on the other side of the water inlet pipe and are arranged in sequence along the length direction of the water inlet pipe toward its pipe opening, and the electric heater is arranged above the expansion water tank;

[0006] It also includes a water outlet pipe, a refrigerant inlet and a refrigerant outlet, the water outlet pipe and the water pump are located on the same side, the refrigerant inlet and the refrigerant outlet are located on the same side as the electric heater, the water outlet pipe is connected to the water outlet of the water pump, and the refrigerant inlet and the refrigerant outlet are connected to the plate heat exchanger;

[0007] The water flows sequentially through the water inlet pipe, the plate heat exchanger, the electric heater, the water pump and the water outlet pipe, and the expansion water tank is connected to the plate heat exchanger and the electric heater; the refrigerant flows sequentially through the refrigerant inlet, the plate heat exchanger and the refrigerant outlet.

[0008] Compared with the existing technology, the heat pump system of the present invention optimizes the layout of the plate heat exchanger, electric heater, water pump, expansion tank, water inlet pipe, water outlet pipe, refrigerant inlet and refrigerant outlet in the shell, making the entire structure more compact, the shell smaller, and the pipe consumables used to connect the various components are reduced, thereby achieving cost reduction and efficiency improvement.

[0009] In one embodiment, the heat pump system further includes a support assembly secured to the bottom of the housing. The electric heater is mounted on the support assembly, and the minimum distance between the electric heater and the bottom of the housing is greater than the height of the expansion tank. The support assembly allows the electric heater to be suspended above the bottom of the housing, providing space for mounting the expansion tank.

[0010] In one embodiment, the support assembly includes a support frame, a heightened frame, and a first positioning member. The support frame is provided with a first strip-shaped hole, the length of which is perpendicular to the length of the electric heater and parallel to the bottom of the housing. The heightened frame is provided with a first assembly hole, through which the first positioning member is connected. The provision of the first strip-shaped hole facilitates installation of the electric heater on the heightened frame, improving installation tolerance, and allows adjustment of the relative distance between the electric heater, the plate heat exchanger, and the water pump, resulting in a more compact structure.

[0011] In one embodiment, the support assembly further comprises a suspension arm. The support frame and the heightened frame are mounted at an end of the electric heater away from the expansion tank. The suspension arm is positioned above the expansion tank and connects the sidewall of the housing to the electric heater. Positioning the suspension arm above the expansion tank fully utilizes the space above the expansion tank, making the structure more compact. Furthermore, the suspension arm and the support frame jointly support both ends of the electric heater, thereby enhancing the stability of the electric heater.

[0012] In one embodiment, the support assembly further includes a second positioning member, the suspension arm having a second slot parallel to the first slot, the electric heater having a second mounting hole, and the second positioning member passing through the second slot to connect with the second mounting hole. The first slot and the second slot cooperate to allow the electric heater to be more neatly mounted within the housing and improve the tolerance for installation errors.

[0013] In one embodiment, the water inlet of the electric heater is arranged opposite to the water outlet of the plate heat exchanger, and the axis of the water inlet of the electric heater coincides with the axis of the water outlet of the plate heat exchanger in the height direction of the shell, which can reduce the length of the water flow pipeline connecting the electric heater and the plate heat exchanger, reduce the degree of bending and consumables.

[0014] In one embodiment, a support assembly for supporting the water flow pipeline is further provided at one end of the water pump away from the water inlet pipe, and the support assembly is provided at the bottom of the housing. The support assembly can further enhance the stability of the water flow pipeline and reduce the degree of curvature of the water flow pipeline and consumable materials.

[0015] In one embodiment, the support assembly includes a support bracket and a pipe fixing clamp. The support bracket is mounted on the bottom of the housing. The pipe fixing clamp includes an arcuate stopper opening toward the support bracket and locking portions disposed oppositely at both ends of the arcuate stopper. The locking portions are fixed to the support bracket. The top of the support bracket and the arcuate stopper form a stopper sleeve coaxial with the water inlet of the water pump. The stopper sleeve prevents the water flow pipeline from moving along the height direction of the housing, thereby improving stability.

[0016] In one embodiment, the heat pump system further includes a first water flow pipeline connecting the electric heater and the water pump, a first refrigerant pipeline connecting the refrigerant inlet and the plate heat exchanger, and a second refrigerant pipeline connecting the refrigerant outlet and the plate heat exchanger. The first water flow pipeline, the first refrigerant pipeline, and the second refrigerant pipeline are all disposed above the expansion tank, and the support assembly supports one end of the first water flow pipeline. This fully utilizes the space above the expansion tank, making the structure more compact and improving space utilization.

[0017] In one embodiment, the plate heat exchanger is located close to one end of the housing, and the electric heater is further provided with an exhaust valve located between the electric heater and one end of the housing. This fully utilizes the space between the electric heater and one end of the housing, making the structure more compact and improving space utilization.

[0018] For better understanding and implementation, the present application is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a heat pump system in one embodiment of the present application;

[0020] Figure 2 A schematic structural diagram of a heat pump system from another perspective in one embodiment of the present application;

[0021] Figure 3 In one embodiment of this application, Figure 2 A partial enlarged view of point A in the middle;

[0022] Figure 4 A schematic structural diagram of an electric heater and a support assembly of a heat pump system in one embodiment of the present application;

[0023] Figure 5 A schematic diagram of a partial structure of a suspension arm and an electric heater assembly of a heat pump system in one embodiment of the present application;

[0024] Figure 6 This is a schematic structural diagram of a support assembly of a heat pump system in one embodiment of the present application.

[0025] Numbers in the figure:

[0026] 1-shell, 2-plate heat exchanger, 3-electric heater, 4-water pump, 5-expansion water tank, 6-water inlet pipe, 7-water outlet pipe, 8-refrigerant inlet, 9-refrigerant outlet, 10-support assembly, 11-third assembly hole, 20-support assembly, 21-water outlet of plate heat exchanger, 30-first water flow pipeline, 31-second assembly hole, 32-water inlet of electric heater, 40-first refrigerant pipeline, 50-second refrigerant pipeline, 60-check valve, 70-filter, 80-expansion valve, 90-exhaust valve, 100-safety valve Valve, 101-support frame, 102-heightening frame, 103-hanging arm, 110-water flow switch, 201-supporting frame, 202-pipe fixing clamp, 203-limiting sleeve, 1011-first strip hole, 1012-fixing part, 1013-supporting part, 1021-first assembly hole, 1022-heightening part, 1023-first supporting leg, 1031-second strip hole, 1032-third strip hole, 2011-supporting part, 2012-second supporting leg, 2021-arc-shaped limiting part, 2022-locking part. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. It is understood that the drawings are only provided for reference and illustration purposes and are not used to limit the present application. The connection relationship shown in the drawings is only for the convenience of clear description and does not limit the connection method.

[0028] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intermediate component at the same time. Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as those generally understood by technicians in the technical field of this application. It should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, an electrical connection, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances. The terms used in this document in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0029] It should also be noted that in the description of this application, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] See also Figure 1 This embodiment provides a heat pump system, including a shell 1, a plate heat exchanger 2, an electric heater 3, a water pump 4, an expansion water tank 5 and a water inlet pipe 6. The shell 1 has an open receiving chamber, and the plate heat exchanger 2, the electric heater 3, the water pump 4, the expansion water tank 5 and the water inlet pipe 6 are received in the receiving chamber. The water inlet pipe 6 is arranged in the middle of the receiving chamber along the length direction of the shell 1. The plate heat exchanger 2 and the water pump 4 are arranged on one side of the water inlet pipe 6 and are arranged in sequence along the length direction of the water inlet pipe 6 toward its pipe mouth. The electric heater 3 and the expansion water tank 5 are arranged on the other side of the water inlet pipe 6 and are arranged in sequence along the length direction of the water inlet pipe 6 toward its pipe mouth. The electric heater 3 is arranged above the expansion water tank 5.

[0031] It also includes a water outlet pipe 7, a refrigerant inlet 8 and a refrigerant outlet 9, the water outlet pipe 7 and the water pump 4 are located on the same side, the refrigerant inlet 8 and the refrigerant outlet 9 are located on the same side as the electric heater 3, the water outlet pipe 7 is connected to the water outlet of the water pump 4, and the refrigerant inlet 8 and the refrigerant outlet 9 are connected to the plate heat exchanger 2;

[0032] The water flows through the water inlet pipe 6, the plate heat exchanger 2, the electric heater 3, the water pump 4 and the water outlet pipe 7 in sequence, and the expansion water tank 5 connects the plate heat exchanger 2 and the electric heater 3; the refrigerant flows through the refrigerant inlet 8, the plate heat exchanger 2 and the refrigerant outlet 9 in sequence.

[0033] The housing 1 has a square structure, which makes it easier to integrate with long or square components such as the plate heat exchanger 2, the electric heater 3, the expansion tank 5, and water pipes. This allows for more efficient use of the space within the housing 1, reduces space waste, and achieves a more compact structure. Preferably, the housing 1 has a rectangular structure, with the lengths of the plate heat exchanger 2, the electric heater 3, and the expansion tank 5 parallel to the length of the housing 1. In other embodiments, the housing 1 may have a square structure. In other embodiments, the housing 1 may have a circular structure or other shapes.

[0034] Please also refer to Figures 2 to 4 The heat pump system further includes a support assembly 10, which is fixed to the bottom of the housing 1. The electric heater 3 is mounted on the support assembly 10. The minimum distance between the electric heater 3 and the bottom of the housing 1 is greater than the height of the expansion tank 5. The support assembly 10 allows the electric heater 3 to be suspended above the bottom of the housing 1, fully utilizing the vertical space within the housing 1 for mounting the expansion tank 5. In another embodiment, the support assembly 10 can also be mounted on the side wall of the housing 1, suspending the electric heater 3 above the expansion tank 5.

[0035] The support assembly 10 includes a support frame 101, a heightening frame 102, and a first positioning member. The support frame 101 is provided with a first strip hole 1011. The length direction of the first strip hole 1011 is perpendicular to the length direction of the electric heater 3 and parallel to the bottom of the shell 1. The heightening frame 102 is provided with a first assembly hole 1021. The first positioning member passes through the first strip hole 1011 and is connected to the first assembly hole 1021. The provision of the first strip hole 1011 facilitates the installation of the electric heater 3 on the heightening frame 102, improves the installation tolerance, and can adjust the relative distance between the electric heater 3 and the plate heat exchanger 2 and the water pump 4, making the structure more compact. The first positioning member is a screw, and the first assembly hole 1021 is a threaded hole. The screw passes through the first strip hole 1011 and is threadedly connected to the threaded hole to fasten the support frame 101 to the heightening frame 102. In other embodiments, the first positioning member can also be a pin, a buckle, or other positioning structure. Specifically, the support frame 101 is welded to the outer wall of the pipe of the electric heater 3. The support frame 101 is an "L"-shaped structure, including a fixing portion 1012 and a supporting portion 1013 perpendicular to each other. The first strip hole 1011 is provided in the fixing portion 1012. The fixing portion 1012 is provided on the elevated frame 102 through the first strip hole 1011. The supporting portion 1013 has a U-shaped opening with an upward opening, and the U-shaped opening is in contact with the outer wall of the pipe of the electric heater 3. In other embodiments, the support member can also be an inverted "T"-shaped structure or a structure of other shapes. The elevated frame 102 includes an "n"-shaped elevated portion 1022 and first legs 1023 arranged at the bottom of both ends of the elevated portion 1022. The first legs 1023 are fixed to the chassis. The first assembly hole 1021 is provided at the top of the elevated portion 1022, and the fixing portion 1012 is provided at the top of the elevated portion 1022. The heightened frame 102 of this shape has better stability, and has a larger moment of inertia and bearing capacity, and can bear a larger load. In other embodiments, the heightened frame 102 can also be a simple column structure or a structure of other shapes.

[0036] Please also refer to Figure 5The support assembly 10 further includes a suspension arm 103. The support frame 101 and the raising frame 102 are arranged at the end of the electric heater 3 away from the expansion water tank 5. The suspension arm 103 is arranged above the expansion water tank 5 and connects the side wall of the shell 1 and the electric heater 3. The suspension arm 103 is arranged above the expansion water tank 5 to fully utilize the space above the expansion water tank 5, making the structure more compact. In addition, the suspension arm 103 and the support frame 101 jointly support both ends of the electric heater 3 to enhance the stability of the electric heater 3. Specifically, the suspension arm 103 is an "L"-shaped structure and is located above the electric heater 3. One end of the suspension arm 103 is connected to the side wall of the shell 1, and the other end is connected to the top of the electric heater 3, so that the electric heater 3 is suspended above the expansion water tank 5. In another embodiment, the boom 103 is a second support frame, which is fixed to the side wall of the shell 1 , located between the electric heater 3 and the expansion water tank 5 , and supports the bottom of the electric heater 3 .

[0037] The support assembly 10 also includes a second positioning member, the suspension arm 103 is provided with a second strip hole 1031 parallel to the first strip hole 1011, the electric heater 3 is provided with a second assembly hole 31, and the second positioning member passes through the second strip hole 1031 and is connected to the second assembly hole 31. The first strip hole 1011 and the second strip hole 1031 cooperate with each other to enable the electric heater 3 to be installed in the shell 1 in a more regular manner, and the installation tolerance of the electric heater 3 can be improved. Preferably, the second positioning member is a screw, and the second assembly hole 31 is a threaded hole. The screw passes through the second strip hole 1031 and is threadedly connected to the threaded hole to fasten the suspension arm 103 and the electric heater 3 together. In other embodiments, the second positioning member can also be a pin, a buckle or other positioning structure. Furthermore, the support assembly 10 also includes a third positioning member. The suspension arm 103 is further provided with a third strip hole 1032 parallel to the length direction of the housing 1. The side wall of the housing 1 is provided with a third assembly hole 11. The third positioning member passes through the third strip hole 1032 and is connected to the third assembly hole 11. The arrangement of the second strip hole 1031 and the third strip hole 1032 facilitates adjustment of the relative positions of the suspension arm 103, the side wall of the housing 1, and the electric heater 3, thereby improving the convenience and accuracy of installation of the electric heater 3. In another embodiment, the suspension arm 103 and the housing 1 can also be integrally formed.

[0038] The water inlet 3232 of the electric heater is arranged opposite to the water outlet 2121 of the plate heat exchanger, and the axis of the water inlet 3232 of the electric heater coincides with the axis of the water outlet 2121 of the plate heat exchanger in the height direction of the shell 1, which can shorten the length of the water flow pipeline connecting the electric heater 3 and the plate heat exchanger 2, reduce the number of bends and consumables of the water flow pipeline, make the structure more compact, increase the flow rate of the water flow, and further improve the circulation efficiency of the entire heat pump system.

[0039] A support assembly 20 for supporting the water flow pipeline is further provided at the end of the water pump 4 away from the inlet pipe 6. The support assembly 20 is located at the bottom of the housing 1. The support assembly 20 further enhances the stability of the water flow pipeline within the housing 1 and reduces bending and material consumption. In alternative embodiments, the support assembly 20 can also be mounted on the side wall of the housing 1.

[0040] Please also refer to Figure 6 The support assembly 20 includes a support bracket 201 and a pipe fixing clamp 202. The support bracket 201 is provided at the bottom of the housing 1. The pipe fixing clamp 202 includes an arc-shaped limiting portion 2021 with an opening toward the support bracket 201, and locking portions 2022 disposed at opposite ends of the arc-shaped limiting portion 2021. The locking portions 2022 are fixed to the support bracket 201. The top of the support bracket 201 and the arc-shaped limiting portion 2021 form a limiting sleeve 203 coaxial with the water inlet of the water pump 4. The limiting sleeve 203 prevents the water flow pipeline from jumping along the height direction of the housing 1, thereby improving stability. Preferably, the support bracket 201 includes an N-shaped support portion 2011 and second legs 2012 disposed at the bottom ends of the support portion 2011. The second legs 2012 are fixed to the chassis, and the locking portion 2022 is disposed at the top of the support portion 2011. This shape of the support bracket 201 provides greater stability, a larger moment of inertia, and bearing capacity, enabling it to withstand greater loads. In other embodiments, the support bracket 201 may also be a simple columnar structure or other shapes.

[0041] The heat pump system also includes a first water flow pipeline 30 connecting the electric heater 3 and the water pump 4, a first refrigerant pipeline 40 connecting the refrigerant inlet 8 and the plate heat exchanger 2, and a second refrigerant pipeline 50 connecting the refrigerant outlet 9 and the plate heat exchanger 2. The first water flow pipeline 30, the first refrigerant pipeline 40, and the second refrigerant pipeline 50 are all located above the expansion water tank 5, and the support assembly 20 supports one end of the first water flow pipeline 30. The space above the expansion water tank 5 is fully utilized, making the structure more compact and improving space utilization. Specifically, the one-way valve 60, filter 70, and expansion valve 80 connected to the refrigerant inlet 8 are also located above the expansion water tank 5.

[0042] The plate heat exchanger 2 is located near one end of the shell 1, and the electric heater 3 is also equipped with an exhaust valve 90, which is located between the electric heater 3 and one end of the shell 1. Because the plate heat exchanger 2 protrudes from the electric heater 3 in the longitudinal direction of the shell 1, there is still a certain amount of usable space between the electric heater 3 and the end of the shell 1. To prevent space waste, the exhaust valve 90 is located at the end of the electric heater 3 near the end of the shell 1, making the structure more compact and improving space utilization. Specifically, the water flow pipeline connecting the electric heater 3 and the plate heat exchanger 2 is also equipped with a safety valve 100 and a water flow switch 110. The safety valve 100 and the water flow switch 110 are located on the same side as the exhaust valve 90, fully utilizing the space between the water flow pipeline and the end of the shell 1.

[0043] The specific examples described above further illustrate the purpose, technical solutions and beneficial effects of this application. It should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heat pump system, characterized in that: include: A shell, a plate heat exchanger, an electric heater, a water pump, an expansion water tank, and a water inlet pipe, wherein the shell has an open receiving chamber, the plate heat exchanger, the electric heater, the water pump, the expansion water tank, and the water inlet pipe are received in the receiving chamber, the water inlet pipe is arranged in the middle of the receiving chamber along the length direction of the shell, the plate heat exchanger and the water pump are arranged on one side of the water inlet pipe and are arranged in sequence along the length direction of the water inlet pipe toward its pipe opening, the electric heater and the expansion water tank are arranged on the other side of the water inlet pipe and are arranged in sequence along the length direction of the water inlet pipe toward its pipe opening, and the electric heater is arranged above the expansion water tank; It also includes a water outlet pipe, a refrigerant inlet and a refrigerant outlet, the water outlet pipe and the water pump are located on the same side, the refrigerant inlet and the refrigerant outlet are located on the same side as the electric heater, the water outlet pipe is connected to the water outlet of the water pump, and the refrigerant inlet and the refrigerant outlet are connected to the plate heat exchanger; The water flows through the water inlet pipe, the plate heat exchanger, the electric heater, the water pump and the water outlet pipe in sequence, and the expansion water tank is connected to the plate heat exchanger and the electric heater; The refrigerant flows through the refrigerant inlet, the plate heat exchanger and the refrigerant outlet in sequence.

2. The heat pump system according to claim 1, characterized in that: It also includes a support assembly, which is fixed to the bottom of the shell. The electric heater is arranged on the support assembly, and the minimum distance between the electric heater and the bottom of the shell is greater than the height of the expansion water tank.

3. The heat pump system according to claim 2, characterized in that: The support assembly includes a support frame, a heightening frame and a first positioning member. The support frame is provided with a first strip hole. The length direction of the first strip hole is perpendicular to the length direction of the electric heater and parallel to the bottom of the shell. The heightening frame is provided with a first assembly hole. The first positioning member passes through the first strip hole and is connected to the first assembly hole.

4. The heat pump system according to claim 3, characterized in that: The support assembly also includes a suspension arm. The support frame and the heightening frame are arranged at one end of the electric heater away from the expansion water tank. The suspension arm is arranged above the expansion water tank. The suspension arm connects the side wall of the shell and the electric heater.

5. The heat pump system according to claim 4, characterized in that: The support assembly further includes a second positioning member, the suspension arm is provided with a second strip hole parallel to the first strip hole, the electric heater is provided with a second assembly hole, and the second positioning member passes through the second strip hole and is connected to the second assembly hole.

6. The heat pump system according to any one of claims 1 to 5, characterized in that: The water inlet of the electric heater is arranged opposite to the water outlet of the plate heat exchanger, and the axis of the water inlet of the electric heater coincides with the axis of the water outlet of the plate heat exchanger in the height direction of the shell.

7. The heat pump system according to any one of claims 1 to 5, characterized in that: The water pump is further provided with a supporting assembly for supporting the water flow pipeline at one end away from the water inlet pipe orifice, and the supporting assembly is arranged at the bottom of the shell.

8. The heat pump system according to claim 7, characterized in that: The supporting assembly includes a supporting bracket and a pipe fixing clamp. The supporting bracket is arranged at the bottom of the shell. The pipe fixing clamp includes an arc-shaped limiting portion with an opening toward the supporting bracket, and locking portions relatively arranged at both ends of the arc-shaped limiting portion. The locking portions are fixed to the supporting bracket. The top of the supporting bracket and the arc-shaped limiting portion form a limiting sleeve coaxial with the water inlet of the water pump.

9. The heat pump system according to claim 7, characterized in that: It also includes a first water flow pipeline connecting the electric heater and the water pump, a first refrigerant pipeline connecting the refrigerant inlet and the plate heat exchanger, and a second refrigerant pipeline connecting the refrigerant outlet and the plate heat exchanger. The first water flow pipeline, the first refrigerant pipeline and the second refrigerant pipeline are all arranged above the expansion water tank, and the supporting assembly supports one end of the first water flow pipeline.

10. The heat pump system according to any one of claims 1 to 5, characterized in that: The plate heat exchanger is close to one end of the shell, and the electric heater is further provided with an exhaust valve, which is located between the electric heater and one end of the shell.

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