Pump valve integration device for automobile thermal management system

Abstract

The utility model discloses a pump valve integration device for an automobile thermal management system, which comprises a shell, a central shaft, a pumping driving component, a rotary guide plate, a clutch plate component and an impeller, a water inlet pipe orifice is arranged at the center of the bottom surface of the shell, a plurality of water outlets are arranged on the peripheral surface of the shell, the central shaft is arranged at the center of the shell, and the impeller is rotatably connected onto the central shaft; the rotary flow guide plate is arranged on the outer side of the impeller, an overflowing through hole is formed in the rotary flow guide plate, a clutch plate assembly, a pumping driving assembly and a shell cover are sequentially arranged above the impeller, the upper end of the center shaft is fixedly connected to the shell cover, and the pumping driving assembly can simultaneously drive the impeller to rotate and drive the clutch plate assembly to move up and down. After the clutch plate assembly is stressed and pressed downwards, the impeller and the rotary flow guide plate can be in transmission connection, the impeller drives the clutch plate assembly to rotate, the clutch plate assembly drives the rotary flow guide plate to rotate synchronously, the overflowing through hole is switched among different water outlets, and the outflow direction of liquid flow is changed. The device has the advantages of being small in size, not prone to leakage and high in integration degree.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive thermal management systems, and specifically relates to a pump and valve integrated device for automotive thermal management systems. Background Technology

[0002] The automotive thermal management system is a crucial component of new energy vehicles. Its primary function is to regulate the temperature of various components and spaces within the vehicle, maintaining these components within their optimal operating temperature range and ensuring passenger comfort. In recent years, the rapid development of pure electric and other new energy vehicles has driven the trends of electrification and integration, influencing the development direction of thermal management systems. Currently, new energy vehicle thermal management systems mainly consist of a refrigerant circuit and a coolant circuit. Components in the refrigerant circuit include compressors, condensers, evaporators, and expansion valves, while components in the coolant circuit include electric water pumps, multi-way valves, water tanks, and heaters. Both the refrigerant and coolant circuits require multiple pumps and valves to control fluid movement. Pumps and valves are typically separate components; the difference lies in that a pump is a machine used to transport fluid, while a valve is a machine used to change the direction of fluid flow. In new energy vehicles, fluid pumps are typically used to transport coolant, which is then circulated within the vehicle's thermal management system by valves that control its direction and opening / closing, thus heating or cooling components. Installing too many pumps and valves in a thermal management system increases the risk of pipeline leaks and is not conducive to saving parts and reducing the overall volume of fluid channels, resulting in a low degree of integration in the thermal management system.

[0003] Chinese patent CN117189622A discloses a "Multi-port Fluid Pump with Integrated Valve." This device includes a pump; a pump housing with a pump chamber; a fluid inlet for conveying fluid into the pump chamber; multiple fluid outlet ports extending from the pump housing; an impeller for driving the fluid in the pump chamber; and a valve component rotatably mounted between the impeller and the multiple fluid outlet ports for selectively guiding fluid flow from the pump chamber to one or more of the multiple fluid outlet ports. While this device achieves the goal of combining a pump and valve to reduce the number of pumps and valves, this integrated pump-valve device is bulky, has a redundant shape, lacks an integration interface, and is difficult to combine with a thermal management module, thus not conforming to the development trend of lightweighting and integration. Utility Model Content

[0004] To address the aforementioned problems and technical requirements, this utility model provides a pump-valve integration device for automotive thermal management systems. It integrates a four-way valve and a water pump into one unit. The integrated device has both the function of driving fluids with a water pump and the function of controlling flow direction with a valve. Furthermore, the device has an integration interface, which can be quickly embedded into the thermal management system. It has the advantages of small size, low cost, low leakage, and easy integration.

[0005] The technical solution of this utility model is as follows: A pump-valve integrated device for an automotive thermal management system includes a housing, a central shaft, a pumping drive assembly, a rotating guide plate, a clutch plate assembly, and an impeller. The housing is a cylindrical structure with an opening at the top. A water inlet is located at the center of the bottom surface of the housing, and multiple water outlets are distributed at equal angles on the circumference of the housing. A central shaft is located at the center of the housing, and the impeller is rotatably connected to the central shaft. External water flows into the impeller through the water inlet, and the impeller drives the water flow to rotate. The rotating guide plate is located outside the impeller and has a flow passage hole. When the flow passage hole rotates with the rotating guide plate... When the impeller moves to any outlet, the water inside can flow out through the flow passage and the outlet. Around the central shaft, above the impeller, there are a clutch plate assembly, a pump drive assembly, and a cover. The upper end of the central shaft is fixedly connected to the cover, which closes the opening at the top of the housing. The pump drive assembly can simultaneously drive the impeller to rotate and drive the clutch plate assembly to move up and down. When the clutch plate assembly is pressed down, it can drive the impeller and the rotating guide plate to rotate. The impeller drives the clutch plate assembly to rotate, and the clutch plate assembly drives the rotating guide plate to rotate synchronously, so that the flow passage switches between different outlets, changing the direction of the liquid flow.

[0006] Furthermore, the pumping drive assembly includes a stator plate, a stator magnet, a permanent magnet, and a rotor magnet. The stator plate and the housing cover are fixedly connected. The stator magnet is encapsulated between the stator plate and the housing cover. The impeller core is provided with an extension sleeve, which is rotatably connected to the outside of the central shaft. The rotor magnet is connected to the upper part of the extension sleeve. The rotor magnet is provided with a permanent magnet, which corresponds to the position of the stator magnet. When energized, the stator plate drives the permanent magnet and the rotor magnet to rotate. The rotor magnet drives the extension sleeve and the impeller to rotate synchronously, so that the liquid flow is pumped into the impeller through the water inlet.

[0007] Furthermore, the clutch plate assembly includes a pressure plate and a magnetic pressure head. The pressure plate is annular, and the magnetic pressure head is rigidly connected to the upper surface of the pressure plate. The inner side of the lower end surface of the pressure plate is embedded with the impeller. The outer side of the lower end surface of the pressure plate is a downwardly protruding annular friction surface one, and the top surface of the rotating guide plate is an annular friction surface two. The annular friction surface one and the annular friction surface two are correspondingly arranged. After sensing the electromagnetic force, the magnetic pressure head presses downward, causing the pressure plate to move downward. The annular friction surface one and the annular friction surface two are pressed together, and the impeller simultaneously drives the pressure plate and the rotating guide plate to rotate.

[0008] Furthermore, the inner wall of the rotating guide plate is provided with a groove, and the outer circumference of the impeller is provided with a circumferential liquid outlet. The circumferential liquid outlet and the through hole are arc-shaped through holes that penetrate the inner and outer walls of the rotating guide plate. Multiple sealing gaskets are tightly installed on the inner wall of the housing, and the sealing gaskets are installed at the circular edge of the outlet.

[0009] Furthermore, the stator board is a PCB stator board, which has multiple small coils printed on it. These small coils are evenly distributed around the center of the PCB stator board at its edge. The magnetic pressure head corresponds to the position of one coil. When a small coil is energized individually, the small coil and the magnetic pressure head generate a repulsive electromagnetic force, which drives the pressure plate to move downward.

[0010] Furthermore, the upper end face of the impeller is provided with an annular interlocking groove, and multiple pins are provided in the interlocking groove. A spring is sleeved on the outside of each pin. The inner side of the lower end face of the pressure plate is provided with an annular protrusion corresponding to the interlocking groove. Multiple pin holes are provided on the annular protrusion. The pin holes are sleeved on the pins one by one. When the top of the pressure plate is not under force, the spring supports the pressure plate, so that the first annular friction surface is disengaged from the second annular friction surface.

[0011] Furthermore, the upper end of the central shaft is embedded and connected to the center of the shell cover. The central shaft is provided with two sets of upper and lower sliding sleeves. The extended sleeve of the impeller wraps around the two sets of sliding sleeves from the outside, so that the impeller is rotatably connected to the central shaft. The bottom end of the central shaft extends to the center of the water inlet. A shaft cap is installed at the bottom end of the central shaft. The water flowing in from the water inlet enters the impeller from around the shaft cap.

[0012] Furthermore, the pressure plate and the rotating guide plate are made of plastic or carbon-based materials, and the magnetic pressure head and the permanent magnet are made of the same material, which is hard magnetic material.

[0013] Furthermore, the cover is provided with an electrical connector, through which power can be supplied to the stator plate.

[0014] The beneficial effects of this utility model are:

[0015] This device highly integrates the pump and valve actuators, unlike the conventional series connection of pump and valve. The PCB stator acts as the motor stator, driving the impeller to rotate and performing the pumping function. It also functions as the valve actuator, driving the pressure plate up and down, which in turn rotates the guide plate to change the flow direction. Furthermore, because the small coil can be powered independently, both functions have independent circuits, ensuring independent operation of the pump and valve without mutual interference. This integrated pump and valve design significantly reduces size and cost. Moreover, the high integration eliminates the need for water pipe connections, effectively minimizing the risk of leakage. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the pump and valve integrated device of this utility model;

[0017] Figure 2 This is an exploded view of the pump and valve integrated device of this utility model;

[0018] Figure 3This is a cross-sectional view of the pump-valve integrated device of this utility model;

[0019] Figure 4 This is a structural diagram of the housing in the pump-valve integrated device of this utility model;

[0020] Figure 5 This is a structural diagram of the pump-valve integrated device of this utility model after removing the housing and cover;

[0021] Figure 6 This is a diagram showing the fit between the pressure plate and the rotating guide plate in the pump-valve integrated device of this utility model;

[0022] Figure 7 This is a diagram showing the connection relationship between the rotor magnet and the impeller in the pump-valve integrated device of this utility model;

[0023] Figure 8 This is a structural diagram of the bottom surface of the pressure plate in the pump and valve integrated device of this utility model;

[0024] Figure 9 This is a top structural diagram of the impeller in the pump-valve integrated device of this utility model;

[0025] Figure 10 This is a diagram showing the fit between the stator plate and the magnetic pressure head in the pump-valve integrated device of this utility model;

[0026] Figure 11 This is a perspective view of the internal structure of the stator plate in the pump-valve integrated device of this utility model;

[0027] The components in the diagram are labeled as follows: 1. Shell cover; 11. Electrical connector; 2. Central shaft; 21. Sliding sleeve; 22. Shaft cap; 3. Pump drive assembly; 31. Stator plate; 31. Small coil; 32. Stator magnet; 33. Permanent magnet; 34. Rotor magnet; 4. Rotating guide plate; 41. Flow hole; 42. Annular friction surface II; 43. Groove; 5. Clutch plate assembly; 51. Magnetic pressure head; 52. Pressure plate; 52. Annular friction surface I; 52. Annular protrusion; 522. Pin hole; 5221. Impeller; 6. Extended sleeve; 61. Circumferential liquid outlet; 62. Embedding groove; 63. Pin; 631. Spring; 632. Shell; 7. Inlet pipe; 71. Outlet; 72. Sealing gasket; 73. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] like Figure 1-11The present invention relates to a pump and valve integrated device for an automotive thermal management system, comprising a housing 7, a central shaft 2, a pumping drive assembly 3, a rotating guide plate 4, a clutch plate assembly 5, and an impeller 6. The housing 7 is a cylindrical structure with an opening at the top. A water inlet 71 is provided at the center of the bottom surface of the housing 7, and multiple water outlets 72 are provided at equal angles on the circumference of the housing 7. The central shaft 2 is located at the center of the housing 7, and the impeller 6 is rotatably connected to the central shaft 2. External water flows into the impeller 6 through the water inlet 71, and the impeller 6 drives the water flow to rotate.

[0030] The rotating guide plate 4 is located on the outside of the impeller 6. The rotating guide plate 4 is provided with a flow passage 41. When the flow passage 41 rotates with the rotating guide plate 4 to any outlet 72, the water in the impeller 6 can flow out through the flow passage 41 and the outlet 72.

[0031] Around the central shaft 2, above the impeller 6, a clutch plate assembly 5, a pump drive assembly 3, and a housing cover 1 are arranged in sequence. The upper end of the central shaft 2 is fixedly connected to the housing cover 1, and the housing cover 1 closes the top opening of the housing 7. The pump drive assembly 3 can simultaneously drive the impeller 6 to rotate and drive the clutch plate assembly 5 to move up and down. When the clutch plate assembly 5 is pressed down by force, it can drive the impeller 6 and the rotating guide plate 4 to connect. The impeller 6 drives the clutch plate assembly 5 to rotate, and the clutch plate assembly 5 drives the rotating guide plate 4 to rotate synchronously, so that the flow hole 41 switches between different outlets 72, changing the outflow direction of the liquid.

[0032] The pumping drive assembly 3 includes a stator plate 31, a stator magnet 32, a permanent magnet 33, and a rotor magnet 34. The stator plate 31 and the housing cover 1 are fixedly connected. The stator magnet 32 ​​is encapsulated between the stator plate 31 and the housing cover 1. The impeller 6 core is provided with an extension sleeve 61, which is rotatably connected to the outside of the central shaft 2. The rotor magnet 34 is connected to the upper part of the extension sleeve 61. The rotor magnet 34 is provided with a permanent magnet 33, which corresponds to the position of the stator magnet 32.

[0033] The housing cover 1 is equipped with an electrical connector 11, through which power can be supplied to the stator plate 31. The stator plate 31 can perform the function of a stator motor. After power is supplied to the stator plate 31 through the electrical connector 11, the stator plate 31 drives the permanent magnet 33 and the rotor magnet 34 to rotate around the central axis. Since the center of the rotor magnet 34 is connected to the extension sleeve 61, the rotor magnet 34 can drive the extension sleeve 61 and the impeller 6 to rotate synchronously. The rotating impeller 6 draws in liquid through the water inlet 71, and pumps the liquid into the impeller, realizing the function of a pump.

[0034] The clutch plate assembly 5 includes a pressure plate 52 and a magnetic pressure head 51. The pressure plate 52 is annular, and the magnetic pressure head 51 is rigidly connected to the upper end face of the pressure plate 52. The inner side of the lower end face of the pressure plate 52 is embedded with the impeller 6. The outer side of the lower end face of the pressure plate 52 is a downwardly protruding annular friction surface 521. The top surface of the rotating guide plate 4 is an annular friction surface 42. The annular friction surface 521 and the annular friction surface 42 are correspondingly arranged. After sensing the electromagnetic force, the magnetic pressure head 51 presses downward, causing the pressure plate 52 to move downward. The annular friction surface 521 and the annular friction surface 42 abut against each other. The impeller 6 simultaneously drives the pressure plate 52 and the rotating guide plate 4 to rotate. The stator plate 31 is a PCB stator plate. The PCB stator plate has multiple small coils 311 printed and integrated. The multiple small coils 311 are evenly arranged around the center of the PCB stator plate at the edge of the PCB stator plate. The magnetic pressure head 51 corresponds to the position of one coil 311.

[0035] The pressure plate 52 and the rotating guide plate 4 are both made of friction-resistant materials, such as plastic or carbon-based materials; the magnetic pressure head 51 and the permanent magnet 33 are made of the same material, both being hard magnetic materials. After the small coil 311 inside the stator plate 31 is individually energized through the electrical connector, the small coil 311 and the magnetic pressure head 51 generate a repulsive electromagnetic force, and the magnetic pressure head 51 drives the pressure plate 52 to move downward, so that the annular friction surface 1 521 and the annular friction surface 2 42 are pressed together.

[0036] The upper end of the central shaft 2 is embedded and connected to the center of the shell cover 1. The central shaft 2 is provided with two sets of upper and lower sliding sleeves 21. The extended sleeve 61 of the impeller 6 covers the two sets of sliding sleeves 21 from the outside, so that the impeller 6 is rotatably connected to the central shaft 2. The bottom end of the central shaft 2 extends to the center of the water inlet 71. A shaft cap 22 is installed at the bottom end of the central shaft 2. The water flowing in from the water inlet 71 enters the impeller from around the shaft cap 22.

[0037] The upper end face of the impeller 6 is provided with an annular groove 63, and multiple pins 631 are provided in the groove 63. A spring 632 is sleeved on the outside of each pin 631. The inner side of the lower end face of the pressure plate 52 is provided with an annular protrusion 522 corresponding to the groove 63. Multiple pin holes 5221 are provided on the annular protrusion 522, and the pin holes 5221 are sleeved on the pins 631 one by one. When the top of the pressure plate 52 is not under force, the spring 632 supports the pressure plate 52, so that the first annular friction surface 521 is disengaged from the second annular friction surface 42. When the small coil 311 is not energized, the annular protrusion 522 of the pressure plate 52 is also embedded in the groove 63, the pins 631 and the pin holes 5221 are inserted, and the pressure plate 52 and the impeller 6 are in a relatively fixed state. The pressure plate 52 rotates synchronously with the impeller 6. Since the pressure plate 52 does not contact the rotating guide plate 4 in this state, the rotating guide plate 4 does not rotate with the pressure plate 52.

[0038] The inner wall of the rotating guide plate 4 is provided with a groove 43, and the outer circumference of the impeller 6 is provided with a circumferential liquid outlet 62. The flow passage 41 is an arc-shaped through hole that penetrates the inner and outer walls of the rotating guide plate 4. Multiple sealing gaskets 73 are tightly installed on the inner wall of the housing 7, and the sealing gaskets 73 are correspondingly installed at the circular edge of the outlet 72. The liquid is drawn in through the center of the bottom of the impeller 6, and flows outward through the circumferential liquid outlet 62 as the impeller 6 rotates. The liquid flows outward circumferentially into the groove 43, and then outward through the flow passage 41, and flows out through the corresponding outlet 72. The sealing gaskets 73 can achieve a seal between the outlet 72 and the flow passage 41 to prevent leakage after the flow channel is switched.

[0039] The operation process of the pump-valve integrated device of this utility model:

[0040] Power is supplied to the stator plate 31 via the electrical connector 11 on the housing cover 1. In the energized state, the stator plate 31 and stator magnet 32 ​​drive the permanent magnet 33 and rotor magnet 34 to rotate around the central axis 2. The rotor magnet 34 drives the impeller 6 to rotate via the extension sleeve 61. Water flows inward through the inlet pipe 71 and is drawn into the impeller 6 around the shaft cap 22. As the impeller 6 rotates, the water flows outward through the circumferential liquid outlet 62 and enters the groove 43 of the rotating guide plate 4. The water in the groove 43 flows outward through the flow hole 41 and the outlet 72. In this state, the device has a pumping function.

[0041] Power is supplied to a small coil 311 inside the stator plate 31 via electrical connector 11. After power is applied, a repulsive electromagnetic force is generated between the small coil 311 and the magnetic pressure head 51. The magnetic pressure head 51 presses the pressure plate 52 downward. In the initial state, the annular protrusion 522 on the inner side of the bottom of the pressure plate 52 is pinned to the top surface of the impeller 6 through the pin hole 5221. Since the spring 632 on the outer ring of the pin 631 supports the pressure plate 52, the annular friction surface 521 on the outer side of the pressure plate 52 is not in contact with the rotating guide plate 4, while the pressure plate 52 itself rotates with the impeller 6. As the pressure plate 52 moves downward due to the repulsive force... After pressing, the first annular friction surface 521 and the second annular friction surface 42 gradually come into contact and press together. Under the action of friction, the rotating guide plate 4 rotates with the pressure plate 52. During the rotation, the flow passage 41 switches from one outlet 72 to the next outlet, completing the switching of the liquid flow direction. When the liquid flow channel has been switched, the current of the small coil 311 is disconnected, the pressure plate is no longer subjected to repulsive force, the compressed spring 632 is reset, and the pressure plate 52 is pushed upward. The pressure plate 52 and the rotating guide plate 4 are separated, and the rotating guide plate 4 no longer rotates. In this process, the device achieves the function of switching the flow direction as a valve body.

[0042] The above descriptions are merely several preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A pump-valve integrated device for automotive thermal management system, characterized by: The utility model provides a kind of water pump, including shell, center shaft, pumping drive assembly, rotary guide vane, clutch plate assembly and impeller, the shell is the cylinder type structure with opening in top, the shell bottom surface center is equipped with water inlet pipe, the shell peripheral surface is equipped with multiple water outlets of equal angle distribution, the shell center is equipped with center shaft, impeller is rotatably connected on center shaft, external water flow enters impeller by water inlet pipe, impeller drives water flow to rotate;Rotary guide vane is arranged outside impeller, rotary guide vane is equipped with a through hole, when through hole rotates to any one water outlet with rotary guide vane, water flow in impeller can all be discharged outside by through hole and water outlet;Around center shaft, clutch plate assembly, pumping drive assembly and shell cover are sequentially arranged above impeller, center shaft upper end is fixedly connected on shell cover, shell cover closes shell top opening, pumping drive assembly can simultaneously drive impeller rotation and drive clutch plate assembly up and down movement, clutch plate assembly can be transmission connection after being pressed down under force impeller and rotary guide vane, impeller drives clutch plate assembly to rotate, clutch plate assembly drives rotary guide vane to rotate synchronously, so that through hole is switched between different water outlets, changes the direction of liquid flow.

2. The pump-valve integrated device for automotive thermal management system according to claim 1, wherein: The pumping drive assembly includes a stator plate, a stator magnet, a permanent magnet, and a rotor magnet. The stator plate is fixedly connected between the shell cover and the stator magnet. The stator magnet is encapsulated between the stator plate and the shell cover. The impeller core has an elongated sleeve that is rotatably connected to the outside of the center shaft. The rotor magnet is connected to the upper part of the elongated sleeve. The permanent magnet is provided on the rotor magnet and corresponds to the position of the stator magnet. The energized stator plate drives the permanent magnet and the rotor magnet to rotate. The rotor magnet drives the elongated sleeve and the impeller to rotate synchronously, causing the liquid flow to be pumped into the impeller through the water inlet pipe.

3. The pump-valve integrated device for automotive thermal management system according to claim 2, wherein: The clutch plate assembly includes a pressure plate and a magnetic pressure head. The pressure plate is circular. The magnetic pressure head is rigidly connected to the upper end surface of the pressure plate. The inner side of the lower end surface of the pressure plate is embedded with the impeller. The outer side of the lower end surface of the pressure plate is a downwardly protruding annular friction surface I. The top surface of the rotary guide vane is an annular friction surface II. The annular friction surface I and the annular friction surface II are correspondingly arranged. The magnetic pressure head is pressed downward after being subjected to electromagnetic force, causing the pressure plate to move downward. The annular friction surface I and the annular friction surface II are tightly pressed. The impeller simultaneously drives the pressure plate and the rotary guide vane to rotate.

4. The pump-valve integrated device for automotive thermal management system according to claim 3, wherein: The inner wall of the rotary guide vane is provided with a groove. The outer periphery of the impeller is provided with a circumferential liquid flow port. The through hole is an arc-shaped through hole penetrating the inner and outer walls of the rotary guide vane. A plurality of sealing pads are tightly installed on the inner wall of the shell, corresponding to the circular edge of the water outlet.

5. The pump-valve integrated device for automotive thermal management system according to claim 4, wherein: The stator plate is a PCB stator plate. A plurality of small coils are printed and integrated on the PCB stator plate. The plurality of small coils are uniformly arranged on the edge of the PCB stator plate around the center of the PCB stator plate. The magnetic pressure head corresponds to a ring of small coils. After the small coils are individually electrified, the small coils and the magnetic pressure head generate repulsive electromagnetic force. The magnetic pressure head drives the pressure plate to move downward.

6. The pump-valve integrated device for automotive thermal management system according to claim 5, wherein: The upper end surface of the impeller is provided with an annular embedding groove, a plurality of pin columns are arranged in the embedding groove, a spring is arranged outside each pin column, the lower end surface of the pressing plate is provided with an annular protrusion corresponding to the embedding groove, a plurality of pin holes are arranged on the annular protrusion, the pin holes are correspondingly sleeved on the pin columns, the spring supports the pressing plate when the top of the pressing plate is not subjected to force, and the annular friction surface I is separated from the annular friction surface II.

7. The pump-valve integrated device for automotive thermal management system according to claim 6, characterized in that: The upper end of the central shaft is embeddedly connected to the center of the shell cover, the central shaft is provided with two groups of sliding sleeves in the upper and lower directions, the lengthened sleeve of the impeller is wrapped outside the two groups of sliding sleeves, the impeller is rotationally connected with the central shaft, the bottom end of the central shaft extends to the center of the water inlet pipe, and the shaft cap is arranged at the bottom end of the central shaft, and the water flow entering from the water inlet pipe enters the impeller from around the shaft cap.

8. The pump-valve integrated device for automotive thermal management system according to claim 7, characterized in that: The pressing plate and the rotating flow guide plate are made of plastic or carbon-based material, the material of the magnetic pressure head and the permanent magnet is the same, and the material of the magnetic pressure head and the permanent magnet is hard magnetic material.

9. The pump-valve integrated device for automotive thermal management system according to claim 8, characterized in that: The shell cover is provided with an electric connector, and the stator plate can be energized through the electric connector.

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