Electric pump, pump assembly, and integrated assembly

Abstract

An electric pump, a pump assembly, and an integrated assembly. An electric pump (100) comprises a stator assembly (12) and an impeller assembly (152); the stator assembly (12) comprises a stator winding (122) and a mounting portion (124); the stator winding (122) comprises a stator iron core (1221) having a first end face (1221a) and a second end face (1221b); the first end face (1221a) is closer to the impeller assembly (152) with respect to the second end face (1221b); the mounting portion (124) comprises a mounting surface (1241); and in an axial direction of the electric pump (100), the mounting surface (1241) is closer to the second end face (1221b) with respect to the first end face (1221a) or the mounting surface (1241) is equidistant from the first end face (1221a) and the second end face (1221b). In this way, the heat dissipation efficiency of the electric pump is improved.

Description

Electric pumps, pump assemblies and integrated components

[0001] This application claims priority to two Chinese patent applications filed on January 16, 2025, with application number 2025100727599, entitled "Electric Pump, Pump Assembly and Integrated Assembly", and filed on May 30, 2025, with application number 2025107297318, entitled "Electric Pump and Integrated Assembly", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of thermal management, and more particularly to an electric pump, pump assembly, and integrated assembly for automotive, energy storage, or commercial use. Background Technology

[0003] An electric pump includes a stator assembly, which includes stator windings. During the operation of the electric pump, the stator windings will generate a certain amount of heat. If this heat cannot be dissipated from the outside of the electric pump in time, it will affect the service life of the electric pump. Currently, the heat dissipation efficiency of electric pumps is low. Summary of the Invention

[0004] The purpose of this application is to provide an electric pump, pump assembly, and integrated assembly that improves the heat dissipation efficiency of the electric pump.

[0005] To achieve the above objectives, one technical solution of this application is as follows: an electric pump, the electric pump including a stator assembly, the stator assembly including a stator winding and a stator housing, the stator assembly including an outer side wall portion and a mounting portion, the outer side wall portion being located radially outside the stator winding along the radial direction of the electric pump, the mounting portion being protruding from the outer side wall portion, the stator winding including a stator core, the stator core including a first end face and a second end face, the electric pump including at least a portion of an inner cavity, the electric pump including an impeller assembly, the impeller assembly being located in the inner cavity, the first end face being closer to the impeller assembly relative to the second end face along the axial direction of the electric pump, the mounting portion including a mounting surface, the mounting surface being closer to the second end face relative to the first end face along the axial direction of the electric pump, or the distance between the mounting surface and the first end face being the same as the distance between the mounting surface and the second end face.

[0006] In this application's technical solution, the mounting surface is positioned closer to the second end face than the first end face, or the distance between the mounting surface and the first end face is the same as the distance between the mounting surface and the second end face. Compared to existing technical solutions, this application increases the depth into the components (e.g., pump cover, flow channel plate, or kettle) that are installed in conjunction with the electric pump. This increases the area of ​​the working medium covering the stator winding surface, thereby improving the heat dissipation efficiency of the stator winding.

[0007] This application also discloses a pump assembly, which includes a pump housing and an electric pump. The pump housing is sealed to the electric pump. The pump housing includes a pump inlet, a pump outlet, and a main body. The pump outlet is located radially outside the main body and includes a pump outlet. The pump inlet has a pump inlet. The electric pump includes an inlet and an outlet, with the pump inlet communicating with the inlet and the pump outlet communicating with the outlet. The main body includes a mounting cavity. The electric pump includes a stator assembly, which includes a stator winding and a stator housing. The stator assembly includes an outer side wall and a mounting portion. Along the radial direction of the electric pump, the outer side wall is located radially outside the stator winding, and the mounting portion protrudes from the outer side. The stator winding includes a stator core, which includes a first end face and a second end face. The electric pump includes at least a portion of an inner cavity and an impeller assembly located within the inner cavity. Along the axial direction of the electric pump, the first end face is positioned closer to the impeller assembly than the second end face. The mounting portion includes a mounting surface, which is positioned closer to the second end face than the first end face along the axial direction of the electric pump, or the distance between the mounting surface and the first end face is the same as the distance between the mounting surface and the second end face. At least a portion of the outer wall portion is located within the mounting cavity, and this portion of the outer wall portion is sealed to the wall portion corresponding to the mounting cavity. This configuration improves heat dissipation efficiency while meeting different customer needs.

[0008] This application also discloses an integrated assembly including a flow channel plate assembly and an electric pump. The flow channel plate assembly includes a mounting cavity, and the wall corresponding to the mounting cavity includes an inner wall. The electric pump is sealed to the flow channel plate assembly. The electric pump includes a stator assembly, which includes a stator winding and a stator housing. The stator assembly includes an outer wall and a mounting portion. Along the radial direction of the electric pump, the outer wall is located radially outside the stator winding, and the mounting portion protrudes from the outer wall. The stator winding includes a stator core, which includes a first end face and a second end face. The electric pump includes at least a portion of an inner cavity and an impeller assembly located within the inner cavity. Along the axial direction of the electric pump, the first end face is closer to the impeller assembly than the second end face. The mounting portion includes a mounting surface, which, along the axial direction of the electric pump, is closer to the second end face than the first end face, or the distance between the mounting surface and the first end face is the same as the distance between the mounting surface and the second end face. This arrangement of the heat dissipation flow channel between the electric pump and the inner wall facilitates the radial miniaturization of the electric pump. Attached Figure Description

[0009] Figure 1 is a perspective view of an embodiment of the electric pump of this application.

[0010] Figure 2 is a schematic diagram of the exploded structure of the electric pump in Figure 1.

[0011] Figure 3 is a schematic diagram of the structure along the XX section in Figure 1.

[0012] Figure 4 is a three-dimensional structural diagram of the first component in Figure 1 in one direction.

[0013] Figure 5 is a three-dimensional structural diagram of the stator winding in one direction as shown in Figure 4.

[0014] Figure 6 is a three-dimensional structural diagram of an embodiment of the pump assembly of this application in one direction.

[0015] Figure 7 is a schematic diagram of the exploded structure of the pump assembly in Figure 6.

[0016] Figure 8 is a schematic diagram of the structure along the YY section in Figure 6.

[0017] Figure 9 is a three-dimensional structural diagram of the pump cover in Figure 6 in one direction.

[0018] Figure 10 is a front view of the structure of the pump assembly in Figure 6 along the axial direction towards the pump inlet;

[0019] Figure 11 is a schematic diagram of the structure along the ZZ section in Figure 10.

[0020] Figure 12 is a three-dimensional structural schematic diagram of an embodiment of the integrated component of this application in one direction.

[0021] Figure 13 is an exploded structural diagram of an embodiment of the integrated component in Figure 12.

[0022] Figure 14 is a structural schematic diagram along the WW section of one embodiment of Figure 12.

[0023] Figure 15 is a structural schematic diagram of another embodiment of Figure 12 along the W-W' section.

[0024] Figure 16 is a partial cross-sectional view of the existing electric pump installed on the external mating parts.

[0025] Figure 17 is a perspective view of a second embodiment of the electric pump of this application in one direction.

[0026] Figure 18 is a schematic diagram of the exploded structure of the electric pump in Figure 17.

[0027] Figure 19 is a schematic diagram of the structure along the XX section in Figure 17.

[0028] Figure 20 is an enlarged structural diagram of point I in Figure 19.

[0029] Figure 21 is a three-dimensional structural diagram of the stator assembly in Figure 17 in one direction.

[0030] Figure 22 is a schematic diagram of the cross-sectional structure along the YY direction in Figure 21.

[0031] Figure 23 is a three-dimensional structural diagram of the stator winding in one direction in Figure 22.

[0032] Figure 24 is a three-dimensional structural diagram of the pump cover in one direction as shown in Figure 17.

[0033] Figure 25 is a schematic diagram of the front view of the structure along direction B in Figure 24.

[0034] Figure 26 is a schematic diagram of the front view of the structure along direction A in Figure 19.

[0035] Figure 27 is a schematic diagram of the cross-sectional structure along the ZZ direction in Figure 26.

[0036] Figure 28 is an enlarged structural diagram of section II in Figure 27.

[0037] Figure 29 is a three-dimensional structural diagram of the second embodiment of the integrated component of this application in one direction.

[0038] Figure 30 is an exploded structural diagram of an embodiment of the integrated component in Figure 29.

[0039] Figure 31 is a structural schematic diagram along the WW section of one embodiment of Figure 29.

[0040] In the attached diagram: 100, electric pump; 11, pump cover; 111, inlet; 112, outlet; 113, top surface; 114, pump cover cavity; 1141, first mating surface; 115, tongue; 12, stator assembly; 121, stator housing; 1211, first housing; 1212, second housing; 1212a, cylindrical part; 1212b, bottom; 1212c, side part; 1212a, radial extension; 1212b, upper surface; 1212c, lower surface; 1212d, recess; 122, stator winding; 1221, stator core; 1221a, first end face; 1221b, second end face; 1222, insulating frame; 1223, winding; 123. Outer wall portion; 1231. First side surface; 1231a. First section side surface; 1231b. Second section side surface; 1231c. Lateral side surface; 1232. Second side surface; 1243a. Support side surface; 1243b. Upper support surface; 124. Mounting part; 1241. Mounting surface; 1242. End surface; 1243. Support part; 1244. Base; 14. Inner cavity; 141. Rotor cavity; 142. Impeller cavity; 1421. Impeller body cavity; 1422. Pressurization cavity; 1422a. Inlet; 1422b. Outlet; 15. Rotating assembly; 151. Rotor assembly; 152. Impeller assembly; 153. Inner hole; 154. Bushing; 18. Shaft; 22. Connecting plate assembly; 25. First assembly; 26. First assembly; 261. Mounting cavity; 262. Heat dissipation channel; 263. Inner wall; 2631. Side; 2632. Top; 2633. Limiting surface; 264. Drainage groove; 2641. Inner groove; 265. Waterproofing part; 291. First sub-waterproofing part; 292. Second sub-waterproofing part; 293. Third sub-waterproofing part; 294. Fourth sub-waterproofing part; 295. Waterproofing surface; 296. First sub-part; 297. Second sub-part; 27. Sealing part; 28. Limiting part; 281. Screw; 282. Gasket; 101. First reference surface; 102. Second reference surface; 103. First gap; 104. Second gap; 30. Fastening assembly; 200. Integrated assembly; 2001. Flow channel plate; 2001a. Inner wall; 300, Pump assembly; 3001, Pump housing; 3001a, Pump inlet; 3001b, Pump outlet; 3001c, Pump inlet; 3001d, Pump outlet; 3002, Headquarters. Detailed Implementation

[0041] The specific embodiments are described below with reference to the accompanying drawings:

[0042] The electric pump in the following embodiments can provide flow power for the working medium of the automotive thermal management system. The working medium can be water or an aqueous solution, such as an aqueous solution containing 50% ethylene glycol, or other substances.

[0043] Referring to Figures 1 to 15, this application provides an electric pump 100, which includes a pump cover 11, a stator assembly 12, a rotating assembly 15, and a shaft 18. The stator assembly 12 includes a stator winding 122 and a stator housing 121. The stator winding 122 includes a stator core 1221, an insulating frame 1222, and windings 1223. It should be noted that the pump cover 11 can be a separate component. Specifically, the pump cover 11 is sealed and fixedly connected to the stator assembly 12. This sealing and fixing means that when the electric pump 100 is operating, the working medium inside the electric pump 100 will not leak to the outside of the electric pump 100 through the mating surface between the pump cover 11 and the stator assembly 12. Alternatively, the pump cover 11 can be formed in an external structure, which facilitates the miniaturization design of the electric pump 100. The shaft 18 is fixedly connected to the stator assembly 12. Specifically, the shaft 18 is injection molded and fixed to the stator housing 121. It is understood that a portion of the shaft 18 is embedded within the stator housing 121. The electric pump 100 has at least a partial inner cavity 14. Specifically, when the electric pump 100 includes a pump cover 11, the electric pump 100 includes an inner cavity 14; as another embodiment, when the electric pump 100 does not include a pump cover 11, the electric pump 100 includes a partial inner cavity 14. It is understood that the inner cavity 14 is formed after the electric pump 100 is assembled with externally mating components. The rotating assembly 15 is located within the inner cavity 14, which includes a rotor cavity 141 and an impeller cavity 142, and the rotor cavity 141 and impeller cavity 142 are connected. The inner cavity 14 allows the flow of a working medium. The rotating assembly 15 includes a rotor assembly 151 and an impeller assembly 152, and the rotor assembly 151 includes a permanent magnet. At least a portion of the rotor assembly 151 is located in the rotor cavity 141, and the impeller assembly 152 is located in the impeller cavity 142. In one specific embodiment, at least part of the other end of the shaft 18 is located within the rotor cavity 141, at least part of the rotating assembly 15 is sleeved on the outer periphery of the shaft 18, and part of the shaft 18 is fixed to the stator housing 121. The rotating assembly 15 can rotate around the shaft 18. Alternatively, in other embodiments, the rotating assembly 15 and the shaft 18 are fixedly connected, and the shaft 18 rotates together with the rotating assembly 15. The electric pump 100 may also include a circuit board assembly electrically connected to the stator assembly 12. In other embodiments, the electric pump 100 may not include the circuit board assembly; the circuit board assembly is integrated into an external structure, which facilitates miniaturization of the electric pump 100. In this embodiment, the electric pump 100 does not include the circuit board assembly.The pump cover 11 has an inlet 111 and an outlet 112. The inlet 111 is for the working medium to flow into the electric pump 100, and the outlet 112 is for the working medium to flow out of the electric pump 100. When the electric pump 100 is working, it is connected to an external power source. By controlling the current in the stator winding 122, the excitation magnetic field generated by the stator winding 122 is controlled. Under the action of the excitation magnetic field, the rotating assembly 15 rotates around the shaft 18, so that the working medium entering the inner cavity 14 through the inlet 111 rotates with the rotating assembly 15. Under the action of centrifugal force, the working medium leaves the electric pump 100 through the outlet 112. It should be noted that the axial direction of the electric pump 100 is the direction in which the shaft 18 of the electric pump 100 extends, and the radial direction of the electric pump 100 is the direction perpendicular to the axial direction of the electric pump 100.

[0044] Referring to Figure 5, the stator winding 122 includes a stator core 1221, an insulating frame 1222, and windings 1223. The number of windings 1223 is at least three. The insulating frame 1222 covers at least a portion of the surface of the stator core 1221, and serves to isolate the windings 1223 from the stator core 1221, ensuring electrical insulation between them. The insulating frame 1222 and the stator core 1221 can be an integral structural component. Specifically, as one implementation, the insulating frame 1222 is injection molded using the stator core 1221 as an insert. Alternatively, the insulating frame 1222 and the stator core 1221 can be separate components. "Separate components" here means that the insulating frame 1222 and the stator core 1221 are each processed into two separate parts and then assembled. The connection is either limited or fixed through assembly. In this embodiment, the insulating frame 1222 is injection molded with the stator core 1221 as an insert. It can be understood that the stator core 1221 and the insulating frame 1222 are an integral structure. The winding 1223 is wound around the insulating frame 1222. As a specific embodiment, the winding 1223 includes nine windings; however, in other embodiments, the winding 1223 may include other numbers of windings, such as three, six, or twelve. The stator core includes a first end face 1221a and a second end face 1221b. Along the axial direction of the electric pump 100, the first end face 1221a is closer to the impeller assembly 152 than the second end face 1221b.

[0045] As one implementation, referring to Figures 2 to 15, the stator housing 121 includes a first housing 1211 and a second housing 1212. The first housing 1211 is injection molded with at least the stator winding 122 as an insert. A first component 25 is defined, which includes the first housing 1211 and the stator winding 122. The electric pump 100 includes a shaft 18. The second housing 1212 is injection molded with at least the first component 25 and the shaft 18 as inserts. In a specific embodiment, the electric pump 100 includes a connecting plate assembly 22, which is electrically connected to the stator winding 122. The first housing 1211 is injection molded with at least the stator winding 122 and the connecting plate assembly 22 as inserts. This simplifies the manufacturing process of the electric pump 100.

[0046] As mentioned above, the electric pump provides the flow power for the working medium of the automotive thermal management system. The automotive thermal management system includes the electric pump and components that cooperate with the electric pump, such as a pump housing, flow channel plate, or reservoir. The working medium typically flows or stores within these components. When the electric pump is operating, the stator windings generate heat. If this heat cannot be dissipated in a timely manner, it will affect the performance of the electric pump. Rapidly dissipating heat from the stator windings is a technical problem faced by those skilled in the art.

[0047] Currently, as shown in Figure 16, the electric pump 100' includes a stator core 1221', which includes a first end face 1221a' and a second end face 1221b'. Along the axial direction of the electric pump 100', the first end face 1221a' is closer to the impeller assembly 152' relative to the second end face 1221b', and the mounting surface 1241' is positioned closer to the first end face 1221a' relative to the second end face 1221b'. The mounting surface 1241' is the mounting surface 1241' for mating with external parts, and can be understood as a mounting reference surface. To dissipate heat from the stator winding 122', heat dissipation channels are usually provided on the outer wall of the stator housing. Therefore, the dimension of the outer wall 123' in the radial direction of the electric pump 100' must be adapted to the increase in size, and the dimension of the mounting portion 124' in the radial direction of the electric pump 100' must also be adapted to increase. This is not conducive to achieving miniaturization and / or lightweight design of the electric pump 100'. It should be noted that the mounting part 124' is used for fixed connection of components that mate with the electric pump 100'. An increase in the radial dimension of the mounting part 124' will adaptively increase the boundary dimensions of the components that mate with the electric pump 100', which is not conducive to the miniaturization of the components mating with the electric pump 100'. How to achieve miniaturization and / or weight reduction of the electric pump 100' while simultaneously dissipating heat from the stator windings is a technical problem that those skilled in the art need to address, and also a direction that they are actively exploring. This application is proposed against this backdrop.

[0048] As one implementation, please refer to Figures 1 to 15. An electric pump 100 includes a stator assembly 12, which includes a stator winding 122 and a stator housing 121. The stator assembly 12 includes an outer wall portion 123 and a mounting portion 124. Along the radial direction of the electric pump 100, the outer wall portion 123 is located radially outside the stator winding 122, and the mounting portion 124 protrudes from the outer wall portion 123. The stator winding 122 includes a stator core 1221, which includes a first end face 1221a and a second end face 1221b. The electric pump 100 includes at least a portion of the inner cavity 14. The electric pump 100 includes an impeller assembly 152 located in the inner cavity 14. Along the axial direction of the electric pump 100, a first end face 1221a is close to the impeller assembly 152 relative to a second end face 1221b. The mounting portion 124 includes a mounting surface 1241. Along the axial direction of the electric pump 100, the mounting surface 1241 is positioned close to the second end face 1221b relative to the first end face 1221a, or the distance between the mounting surface 1241 and the first end face 1221a is the same as the distance between the mounting surface 1241 and the second end face 1221b. In this way, the electric pump 100 extends to a greater depth inside a component that mates with it (e.g., pump housing 3001, flow channel plate 2001, or kettle). As the working medium typically flows or stores within the component that mates with the electric pump 100, the portion of the electric pump 100 extending into the component that mates with the electric pump 100 can come into contact with the working medium. Specifically, a gap is typically provided between the wall corresponding to the outlet 112 of the electric pump 100 and the component that mates with the electric pump 100. Thus, the working medium output from the outlet 112 of the electric pump 100 flows into the gap formed by the outer wall 123 of the electric pump 100 and comes into contact with the outer wall 123. This facilitates heat dissipation for the electric pump 100. As mentioned above, compared to existing technical solutions, the increased depth of this application extending into the components (e.g., pump cover 3001, flow channel plate 2001, or water jug) that are installed in conjunction with the electric pump 100 facilitates increasing the area of ​​the working medium covering the surface of the stator winding 122, thereby improving the heat dissipation efficiency of the stator winding 122.

[0049] As one implementation, please refer to Figures 1 to 15. The electric pump 100 includes a stator assembly 12, which includes a stator winding 122 and a stator housing 121. The stator winding 122 is located inside the stator housing 121. The stator housing 121 includes an outer wall portion 123 and a mounting portion 124. Along the radial direction of the electric pump 100, the outer wall portion 123 is located radially outside the stator winding 122. The mounting portion 124 protrudes from the outer wall portion 123 and is fixedly connected to an external component. The external component has a mounting cavity 261. A portion of the electric pump 100 is located in the mounting cavity 261. The outer wall portion 123 is located in the mounting cavity 261. The stator winding 122 includes a stator core 1221. Along the axial direction of the electric pump 100, at least half of the axial length of the stator core 1221 is located in the mounting cavity 261. Compared to existing technical solutions, the increased depth of this application extending into the components (e.g., pump cover 3001, flow channel plate 2001, or kettle) that are installed in conjunction with the electric pump 100 is beneficial for increasing the area of ​​the working medium covering the surface of the stator winding 122, thereby improving the heat dissipation efficiency of the stator winding 122.

[0050] Please refer to Figures 1 to 15. To further increase the depth of the electric pump 100 extending into the mounting component that mates with the electric pump 100, as one implementation, the stator housing 121 includes a first housing 1211 and a second housing 1212. The first housing 1211 is injection molded with at least the stator winding 122 as an insert. A first component 25 is defined, which includes the first housing 1211 and the stator winding 122. The electric pump 100 includes a shaft 18. The second housing 1212 is injection molded with at least the first component 25 and the shaft 18 as inserts. An outer wall portion 123 is formed in the second housing 1212, covering the outer periphery of the first component 25. A mounting portion 124 is formed in the second housing 1212. Along the axial direction 18 of the electric pump 100, the mounting portion 124 is located at the end of the outer wall portion 123 and is positioned close to the second end face 1221b relative to the first end face 1221a. In this way, firstly, it further facilitates increasing the depth to which the electric pump 100 extends into the mounting components that mate with it, further facilitating the increase in the area of ​​the working medium covering the surface of the stator winding 122, and thus further facilitating the increase in the heat dissipation efficiency of the stator winding 122. Secondly, the outer wall portion 123 covers the outer periphery of the first component 25, isolating the outer periphery of the first component 25 from the working medium, which helps reduce the contact opportunity between the working medium and the outer periphery of the first component 25, thereby reducing the possibility of contact between the working medium and the stator core 1221, and further reducing the possibility of corrosion of the stator core 1221 by the working medium, thus improving the service life of the electric pump 100.

[0051] As a specific implementation, please refer to Figures 1 to 15. The outer wall portion 123 is a cylindrical structure. Along the axial direction of the electric pump 100, the radial dimensions of the outer wall portion 123 of the cylindrical structure are "approximately" the same. It can be understood that the radial dimensions of the outer wall portion 123 of the cylindrical structure are the same within the manufacturing tolerance range. Specifically, the manufacturing tolerance can be within ±0.5 mm. This structure facilitates the manufacturing and processing of the electric pump 100.

[0052] Furthermore, as one implementation, please refer to Figures 2 to 15. The mounting part 124 includes an end surface 1242. Along the axial direction of the electric pump 100, the end surface 1242 is away from the first end face 1221a relative to the mounting surface 1241. The end surface 1242 constitutes the outer surface of the electric pump 100. Along the axial direction of the electric pump 100, the center plane between the first end face 1221a and the second end face 1221b is defined as the first reference plane 101, and the center plane between the first reference plane 101 and the second end face 1221b is defined as the second reference plane 102. Along the axial direction of the electric pump 100, the mounting surface 1241 is located between the second reference plane 102 and the second end face 1221b. The mounting surface 1241 is disposed close to the second reference plane 102 relative to the second end face 1221b. In this way, firstly, it further facilitates increasing the depth to which the electric pump 100 extends into the mounting components that mate with it, further facilitating the increase in the area of ​​the working medium covering the surface of the stator winding 122, and thus further improving the heat dissipation efficiency of the stator winding 122. Secondly, with this arrangement, the mounting portion 124 can cover part of the stator core 1221, which helps improve the fixing strength between the electric pump 100 and the mounting components that mate with it. Thirdly, while increasing the area of ​​the stator winding 122 surrounded by the working medium, it can be understood that while increasing the heat dissipation efficiency of the stator winding 122, the mounting surface 1241 of the electric pump 100 is closer to the center of mass of the electric pump 100, which helps reduce the vibration and noise of the electric pump 100.

[0053] As another implementation, referring to Figures 1 to 15, along the axial direction of the electric pump 100, the mounting surface 1241 is located between the second reference surface 102 and the second end face 1221b, with the mounting surface 1241 positioned close to the second end face 1221b relative to the second reference surface 102. This further facilitates increasing the area of ​​the working medium covering the surface of the stator winding 122, and consequently further facilitates increasing the heat dissipation efficiency of the stator winding 122.

[0054] As one implementation, please refer to Figures 1 to 15. The mounting portion 124 includes a support portion 1243 and a base portion 1244. Along the axial direction of the electric pump 100, the support portion 1243 is closer to the first end face 1221a relative to the base portion 1244. The dimension of the support portion 1243 along the radial direction of the electric pump 100 is smaller than the dimension of the base portion 1244 along the radial direction of the electric pump 100. Along the radial direction of the electric pump 100, the radial dimension of the outer wall portion 123 is smaller than the radial dimension of the support portion 1243. The mounting surface 1241 is formed on the base portion 1244. This method helps to reduce the manufacturing difficulty of the electric pump 100. For example, the mounting surface 1241 can serve as a sealing surface. The radial dimension of the support portion 1243 being larger than the radial dimension of the base portion 1244 is more conducive to ensuring the manufacturing accuracy error of the mounting surface 1241.

[0055] As one implementation method, please refer to Figures 1 to 15. The electric pump 100 includes a sealing part 27, which is sleeved on the outer wall part 123. When the electric pump 100 is installed on an external component, the component includes a mounting cavity 261, and at least a portion of the outer wall part 123 is located in the mounting cavity 261. The outer wall of the sealing part 27 seals against the wall corresponding to the mounting cavity 261. Along the radial direction of the electric pump 100, the sealing part 27 springs against the wall corresponding to the inner cavity 14. In this way, the electric pump 100 seals with the external component in the radial direction, which is more convenient for manufacturing the electric pump 100 compared to sealing the electric pump 100 with the external component in the axial direction. It can be understood that this reduces the manufacturing difficulty of the electric pump 100, and thus helps to reduce the cost of the electric pump 100.

[0056] Referring to Figures 1 to 15, when the electric pump 100 mates with an external component, a sealing portion 27 can be provided between the outer wall portion 123 and the wall portion corresponding to the mounting cavity 261. Preferably, the sealing portion 27 includes a sealing ring, which achieves a sealed connection between the electric pump 100 and the external component. To ensure the connection strength between the electric pump 100 and the external component, the electric pump 100 and the external component are fixedly connected by screws 281 or bolts. Alternatively, the electric pump 100 and the external component can also be fixedly connected in other ways, including but not limited to welding, bonding, or snap-fitting. Welding methods include but are not limited to laser welding, infrared welding, ultrasonic welding, or rotary friction welding.

[0057] The electric pump 100 may or may not include a pump cover 11. As a specific implementation, please refer to Figure 15. The electric pump 100 does not include a pump cover 11. The pump cover 11 is formed on an external component, such as a flow channel plate 2001 or a kettle. The electric pump 100 includes a partial inner cavity 14, which includes a rotor cavity 141 and a partial impeller cavity 142. The electric pump 100 includes a rotating assembly 15, which includes a rotor assembly 151 and an impeller assembly 152. The rotor assembly 151 and the impeller assembly 152 are fixedly connected or are integral structural components. The rotor assembly 151 and the impeller assembly 152 are injection molded to form an integral structural component. The rotating assembly 15 includes an inner hole 153, which extends through the rotating assembly 15 along the axial direction of the electric pump 100. The inner hole 153 is sleeved on a shaft 18, one end of which is injection molded to a second housing 1212. The electric pump 100 includes a limiting part 28, and the rotating assembly 15 includes a bushing 154. When the electric pump 100 is working, the end of the bushing 154 abuts against the limiting part 28. In this way, firstly, the limiting part 28 is provided on the electric pump 100, which simplifies the structure of the external component and reduces the manufacturing difficulty of the external component. Secondly, it helps to reduce the manufacturing cost of the electric pump 100. Thirdly, except for the location of the sealing part 27, the outer wall part 123 is surrounded by the working medium, which, as mentioned above, means that the outer wall part 123 is immersed in the working medium, thus increasing the heat dissipation efficiency of the stator winding 122.

[0058] As a specific implementation, the electric pump 100 includes a limiting part 28, which includes a screw 281 and a washer 282. The rotating assembly 15 includes a rotor assembly 151, which is fixedly connected to the impeller assembly 152, or the rotor assembly 151 and the impeller assembly 152 are integral structural components. The rotating assembly 15 has an inner hole 153 that extends along the axial direction of the electric pump 100. The inner hole 153 is sleeved on a shaft 18, one end of which is injection molded and fixed to a second housing 1212. The rotating assembly 15 includes a shaft 18 sleeve, and the screw 281 passes through the washer 282 and is fixed to the other end of the shaft 18. The radial dimension of the washer 282 is larger than the radial dimension of the inner hole 153. This simplifies the manufacturing process of the electric pump 100. The material of the washer 282 can be a material with a high wear resistance coefficient, such as a ceramic washer.

[0059] As another implementation, as shown in Figures 1 to 14, the electric pump 100 includes a pump cover 11, which is sealed to the stator housing 121. Along the radial direction of the electric pump 100, the radial dimension of the pump cover 11 is less than or equal to the radial dimension of the stator housing 121. This makes it easier for the electric pump 100 to be installed on an external component. The pump cover 11 and stator housing 121 are sealed together. In one specific implementation, the pump cover 11 and stator housing 121 are sealed and fixed together by using a sealing ring, screws 281, or bolts. In other implementations, the pump cover 11 and stator housing 121 are welded, bonded, or snap-fitted together. Welding methods include, but are not limited to, laser welding, ultrasonic welding, infrared welding, or rotary friction welding. The material of the pump cover 11 includes polyphenylene sulfide (PPS). For high-power water pumps or in environments with high operating temperatures, PPS is typically chosen as the material for the pump cover 11 to better meet the hydraulic efficiency requirements of the pump. Since the components that typically work with the electric pump 100 (e.g., the flow channel plate 2001) are made of polypropylene (PP), in extreme cases, such as high temperatures, or when the manufacturing tolerances of the flow channel plate 2001 assembly cannot meet the hydraulic efficiency requirements of the electric pump 100, it is preferable that the electric pump 100 includes a pump cover 11.

[0060] Referring to Figure 8, to limit the rotation component 15, in one specific embodiment, the electric pump 100 includes a limiting part 28 formed in the pump cover 11. The rotation component 15 includes a rotor assembly 151, which is fixedly connected to the impeller assembly 152, or the rotor assembly 151 and the impeller assembly 152 are integral structural components. The rotation component 15 has an inner hole 153 that extends along the axial direction of the electric pump 100. The inner hole 153 is sleeved on a shaft 18, one end of which is injection molded and fixed to the second housing 1212, and the other end of which is located in the limiting part 28. The rotation component 15 includes a bushing 154, which abuts against the limiting part 28 when the electric pump 100 is working. This simplifies the number of parts in the electric pump 100 and reduces the manufacturing cycle time of the electric pump 100.

[0061] Of course, as another implementation, please refer to Figures 1 to 3 and Figure 15. The electric pump 100 includes a limiting part 28, which includes a screw 281 and a washer 282. The rotating assembly 15 includes a rotor assembly 151, which is fixedly connected to the impeller assembly 152 or the rotor assembly 151 and the impeller assembly 152 are integral structural components. The rotating assembly 15 has an inner hole 153, which extends along the shaft 18 of the electric pump 100. The inner hole 153 is sleeved on the shaft 18. One end of the shaft 18 is injection molded and fixed to the second housing 1212. The rotating assembly 15 includes a shaft 18 sleeve. The screw 281 passes through the washer 282 and is fixed to the other end of the shaft 18. The radial dimension of the washer 282 is larger than the radial dimension of the inner hole 153. Thus, the structure of the electric pump 100, except for the electric pump cover 11, can use the same structure, which helps to increase the adaptability of the electric pump 100. This electric pump 100 can simultaneously serve as both a low-power water pump and a high-power water pump, adapting to the needs of different customers.

[0062] Please refer to Figures 3 and 6 to 11. This application also discloses a pump assembly 300, which includes a pump housing 3001 and an electric pump 100. The pump housing 3001 is sealed to the electric pump 100. The pump housing 3001 includes a pump inlet 3001a, a pump outlet 3001b, and a main body. The pump outlet 3001b is located radially outside the main body and includes a pump outlet 112. The pump inlet 3001a has a pump inlet 111. The electric pump 100... The pump 100 includes an inlet 111 and an outlet 112. The pump inlet 111 communicates with the pump outlet 112. The main body includes a mounting cavity 261. The electric pump 100 includes a stator assembly 12, which includes a stator winding 122 and a stator housing 121. The stator assembly 12 includes an outer side wall portion 123 and a mounting portion 124. Along the radial direction of the electric pump 100, the outer side wall portion 123 is located radially outside the stator winding 122. Part 124 protrudes from the outer wall part 123. The stator winding 122 includes a stator core 1221, which includes a first end face 1221a and a second end face 1221b. The electric pump 100 includes at least a portion of the inner cavity 14 and includes an impeller assembly 152 located within the inner cavity 14. Along the axial direction of the electric pump 100, the first end face 1221a is closer to the impeller assembly 152 than the second end face 1221b. The mounting portion 124 includes a mounting surface 1241, which is positioned along the axis 18 of the electric pump 100. The mounting surface 1241 is positioned relative to the first end face 1221a and close to the second end face 1221b, or the distance between the mounting surface 1241 and the first end face 1221a is the same as the distance between the mounting surface 1241 and the second end face 1221b. At least a portion of the outer wall portion 123 is located within the mounting cavity 261, and the portion of the outer wall portion 123 is sealed to the wall portion corresponding to the mounting cavity 261. This configuration improves heat dissipation efficiency while meeting diverse customer needs.

[0063] Please refer to Figures 12 to 15. This application also discloses an integrated component 200, which includes a flow channel plate 2001 assembly and an electric pump 100. The flow channel plate 2001 assembly includes a mounting cavity 261, and the wall portion corresponding to the mounting cavity 261 includes an inner wall portion 263. The electric pump 100 is sealed to the flow channel plate 2001 assembly. The electric pump 100 includes a stator assembly 12, which includes a stator winding 122 and a stator housing 121. The stator housing 121 is injection molded with at least the stator winding 122 as an insert. The stator assembly 12 includes an outer wall portion 123 and a mounting portion 124. Along the radial direction of the electric pump 100, the outer wall portion 123 is located radially outside the stator winding 122, and the mounting portion 124 protrudes outward. The sidewall portion 123 is provided, and the stator winding 122 includes a stator core 1221. The stator core 1221 includes a first end face 1221a and a second end face 1221b. The electric pump 100 includes at least a portion of the inner cavity 14 and includes an impeller assembly 152 located in the inner cavity 14. Along the axial direction of the electric pump 100, the first end face 1221a is closer to the impeller assembly 152 than the second end face 1221b. The mounting portion 124 includes a mounting surface 1241. Along the axial direction of the electric pump 100, the mounting surface 1241 is positioned closer to the second end face than the first end face, or the distance between the mounting surface 1241 and the first end face 1221a is the same as the distance between the mounting surface 1241 and the second end face 1221b. In this way, the heat dissipation channel 262 is provided between the electric pump 100 and the inner wall portion 263, which is beneficial for achieving radial miniaturization of the electric pump 100.

[0064] As described above, please refer to Figures 1 to 15. As mentioned above, the working medium usually flows or stores in the component that cooperates with the electric pump 100. Thus, the part of the electric pump 100 that extends into the mounting component that cooperates with the electric pump 100 can come into contact with the working medium. In order to accelerate the flow rate of the working medium and further improve the heat dissipation efficiency of the electric pump 100. As one implementation, an electric pump 100 includes a stator assembly 12 and a pump cover 11. The stator assembly 12 includes a stator winding 122 and a stator housing 121. The pump cover 11 is fixedly connected to the stator housing 121. The stator housing 121 includes an outer side wall portion 123, which forms part of the outer surface of the electric pump 100. The outer side wall portion 123 extends from one end of the stator assembly 12 near the pump cover 11 to the other end of the stator assembly 12 away from the pump cover 11. The electric pump 100 includes a mounting surface 1241. The stator core 1221 includes a first end face 1221a and a second end face 1221b. Along the axial direction of the electric pump 100, the first end face 1221a is closer to the second end face 1221b. The pump cover 11 has a mounting surface 1241 positioned relative to the first end face 1221a and close to the second end face 1221b, or the distance between the mounting surface 1241 and the first end face 1221a is the same as the distance between the mounting surface 1241 and the second end face 1221b. The outer wall portion 123 is sealed to an outer inner wall portion 263. The assembly formed by the electric pump 100 and the inner wall portion 263 is defined as a first assembly 26. The first assembly 26 includes a heat dissipation channel 262. The wall portion corresponding to the heat dissipation channel 262 includes at least a portion of the outer wall portion 123 and at least a portion of the inner wall portion 263. The electric pump 100 includes an inlet 111 and an outlet. One end of the heat dissipation channel 262 is connected to the inlet 111, and the other end of the heat dissipation channel 262 is connected to the outlet. In this way, the pressure of the working medium at the inlet 111 of the electric pump 100 is lower than that at the outlet of the electric pump 100. This helps to accelerate the flow of the working medium in the heat dissipation channel 262, thereby improving the heat dissipation efficiency of the electric pump 100.

[0065] As a specific implementation, please refer to Figures 1 to 15. The dimension of the pump cover 11 in the radial direction of the electric pump 100 is less than or equal to the dimension of the outer wall portion 123 in the radial direction of the electric pump 100. The inner wall portion 263 includes a side portion 2631 and a top portion 2632. The side portion 2631 and the outer wall portion 123 are at least partially clearance-fitted. The gap formed by the clearance fit between the side portion 2631 and the outer wall portion 123 is defined as the first gap 103. The pump cover 11 and the top portion 2632 are at least partially clearance-fitted. The gap formed by the clearance fit between the pump cover 11 and the top portion 2632 is defined as the second gap 104. The heat dissipation channel 262 includes the first gap 103 and the second gap 104. Along the axial direction of the electric pump 100, the value of the first gap 103 is greater than the value of the second gap 104. This facilitates the installation of the electric pump 100 with external components.

[0066] As one implementation, please refer to Figures 1 to 15. Further, the inner wall portion 263 includes a limiting surface 2633, the pump cover 11 is clearance-fitted with the top 2632, the outer wall portion 123 is clearance-fitted with the side portion 2631, the limiting surface 2633 is formed on the top 2632, the top surface 113 of the pump cover 11 is in contact with the limiting surface 2633, and the first assembly 26 includes a drainage groove 264. The wall portion corresponding to the drainage groove 264 is formed on the pump cover 11 and / or the inner wall portion 263. Specifically, the wall portion corresponding to the flow channel 264 is formed in the pump cover 11 and the limiting surface 2633. The flow channel 264 includes an inner groove 2641, which is recessed from the end surface 1242 of the pump cover 11 along the axial direction 18 of the electric pump 100. The end surface 1242 of the pump cover 11 abuts against the limiting surface 2633. The flow channel 264 penetrates the pump cover 11 along the radial direction of the electric pump 100. One end of the flow channel 264 communicates with the first gap 103, and the other end of the flow channel 264 communicates with the second gap 104. This arrangement helps to reduce internal leakage of the electric pump 100 at the inlet 111. Multiple inner grooves 2641 are spaced apart along the circumferential direction of the pump cover 11. This arrangement helps to increase the flow rate of the working medium returning to the inlet 111 through the heat dissipation channel 262, thereby improving the heat dissipation efficiency of the stator winding 122.

[0067] Please refer to Figures 1 to 15. To ensure that the working medium circulating around the outer wall portion 123 is as much as possible, as one implementation, the first assembly 26 includes a water-blocking portion 265, which is formed in the electric pump 100 and / or the inner wall portion 263. The water-blocking portion 265 is located in the gap between the outer wall portion 123 and the inner wall portion 263. Along the radial direction of the electric pump 100, one end of the water-blocking portion 265 is fixedly connected to the outer wall portion 123 or one end of the water-blocking portion 265 is integrally formed with the outer wall portion 123, and the other end of the water-blocking portion 265 is connected to the inner wall portion 263. The water-proof portion 265 is fixedly connected to the inner wall portion 263 or integrally formed with the inner wall portion 263. The other end of the water-proof portion 265 abuts against the outer wall portion 123. Alternatively, a portion of the water-proof portion 265 is integrally formed with the outer wall portion 123, and another portion of the water-proof portion 265 is integrally formed with the inner wall portion 263. A portion of the water-proof portion 265 abuts against another portion of the water-proof portion 265. The water-proof portion 265 extends along the axial direction of the electric pump 100. A predetermined distance is spaced between the end of the water-proof portion 265 and the mounting surface 1241. In this way, the working medium flows as close as possible to the outer wall portion 123 of the mounting surface 1241, and is arranged around the outer wall portion 123 through the gap between the mounting surface 1241 and the water-proof portion 265. The working medium surrounding the outer wall portion 123 returns to the inlet 111 of the electric pump 100 through the diversion groove 264. This helps to increase the area of ​​the flowing working medium covering the outer wall portion 123, thereby improving the heat dissipation efficiency of the stator winding 122.

[0068] Referring to Figures 1 to 15, to reduce the smoothness of the flow of the working medium within the heat dissipation channel 262, multiple water-blocking portions 265 are included. These multiple water-blocking portions 265 are spaced apart circumferentially along the outer wall portion 123 and extend axially along the electric pump 100. A predetermined distance is maintained between the end of each water-blocking portion 265 and the mounting surface 1241 or the sealing portion. Specifically, the number of water-blocking portions 265 matches the number of drainage channels 264. In one specific implementation, there are four water-blocking portions 265 and four drainage channels 264. Along the circumferential direction of the electric pump 100, the drainage channels 264 are positioned between adjacent water-blocking portions 265.

[0069] As described above, please refer to Figures 17 to 31. As the working medium usually flows or stores in the component that cooperates with the electric pump 100, the part of the electric pump 100 that extends into the mounting component that cooperates with the electric pump 100 can come into contact with the working medium. In order to accelerate the flow rate of the working medium and further improve the heat dissipation efficiency of the electric pump 100. In one implementation, the electric pump 100 includes a stator assembly 12 and a pump cover 11. The pump cover 11 is formed on the pump housing 3001 or on the flow channel plate assembly 2001. As another implementation, referring to Figures 17 to 28, an electric pump includes a pump cover 11 and a stator assembly 12. The pump cover 11 has a pump cover cavity 114, a portion of the stator assembly 12 is located in the pump cover cavity 114, and the pump cover 11 and the stator assembly 12 are sealed together. The stator assembly 12 includes a stator housing 121 and a stator winding 122, the stator winding 122 being located within the stator housing 121. The stator housing 121 includes an outer wall. Part 123, along the radial direction of the electric pump, the outer wall part 123 is located radially outside the stator winding 122. The electric pump includes a heat dissipation channel 262, which is arranged circumferentially around the stator winding 122. The wall part corresponding to the heat dissipation channel 262 includes part of the outer wall part 123 and part of the wall part corresponding to the pump cover 11 cavity 114. The electric pump includes a booster chamber and an impeller assembly 152. Along the radial direction of the electric pump, the booster chamber 1422 is arranged radially outside the impeller assembly 152. The booster chamber 1422 is arranged circumferentially around the impeller assembly 152 and is connected to the heat dissipation channel 262. In this way, the heat dissipation channel 262 is arranged circumferentially around the stator winding 122. The heat dissipation channel 262 is formed by assembling two separate components, eliminating the need to set the heat dissipation channel 262 inside the stator assembly 12. In this way, while ensuring heat dissipation of the stator assembly 12, it is beneficial to simplify the structure of the electric pump, thereby reducing the manufacturing difficulty of the electric pump.

[0070] As one implementation, please refer to Figures 19 to 28. The stator housing 121 is injection molded with at least the stator winding 122 as an insert. The stator housing 121 includes a mounting portion 124, and the outer side wall portion 123 includes a first side surface 1231. Along the radial direction of the electric pump, the mounting portion 124 protrudes from the first side surface 1231. The stator winding 122 includes a stator core 1221, and the stator core 1221 includes a first end face 1221a and a second end face 1221b. The first end face 1221a is closer to the pump cover 11 than the second end face 1221b. The mounting portion 124 includes a mounting surface 1241. Along the axial direction of the electric pump, the mounting surface 1241 is positioned closer to the second end face 1221b than the first end face 1221a, or the distance between the mounting surface 1241 and the first end face 1221a is the same as the distance between the mounting surface 1241 and the second end face 1221b. The wall surface corresponding to the heat dissipation channel 262 includes a portion of the first side surface 1231. In this way, it is beneficial to increase the depth of the stator assembly 12 extending into the pump cover 11, thereby increasing the length of heat dissipation along the axial direction of the electric pump, increasing the area of ​​the working medium covering the surface of the stator winding 122, and thus improving the heat dissipation efficiency of the stator winding 122.

[0071] As a specific implementation, please refer to Figures 19 to 28. The second housing 1212 includes a mounting portion 124, and the outer wall portion 123 includes a first side surface 1231 and a second side surface 1232. The second side surface 1232 is injection molded and fixed to the first component. The first side surface 1231 constitutes part of the outer wall surface of the stator component 12. The mounting portion 124 protrudes from the first side surface 1231 along the radial direction of the electric pump. The mounting portion 124 includes a mounting surface 1241. The pump cover 11 is disposed on the outer wall portion 123 and includes a top surface 113. Along the axial direction of the electric pump, the top surface 113 and the mounting surface 1241 are mutually restrictive and engaged. In one implementation, the top surface 113 and the mounting surface 1241 are abutted against each other. The mounting surface 1241 is used to restrict the pump cover 11 in the axial direction.

[0072] As one implementation method, please refer to Figures 3 to 12. The pump cover 11 and the stator assembly 12 are sealed together. Specifically, the electric pump 100 includes a sealing part 27 and a fastening assembly 30. The sealing part 27 is sleeved on the outer wall part 123. Specifically, the sealing part 27 is spring-loaded between the first side surface 1231 and the wall surface corresponding to the pump cover cavity 114. Along the axial direction of the electric pump 100, the sealing part is close to the mounting surface 1241 relative to the heat dissipation channel 262. The pump cover 11 and the stator assembly 12 are fixed by the fastening assembly 30. The fastening assembly 30 includes a screw assembly, or the fastening assembly 30 is the molten part when welding the pump cover 11 and the stator assembly 12. The welding methods of the pump cover 11 and the stator assembly 12 include, but are not limited to, laser welding, infrared welding, rotary friction welding, hot gas welding, and ultrasonic welding. This method helps to reduce external leakage of the electric pump, thereby improving the hydraulic efficiency of the electric pump output.

[0073] To further position the pump cover 11, please refer to Figures 17 to 22. The outer wall portion 123 includes a support portion 1243. The wall surface corresponding to the pump cover cavity 114 includes a first mating surface 1141, which is connected to the end face. The support portion 1243 protrudes from the first side surface 1231 along the radial direction of the electric pump. The support portion 1243 includes a support side surface 1243a, which is formed on the end face of the support portion 1243. The support side surface 1243a and the first mating surface 1141 are in a limiting fit. The limiting fit can be a clearance fit, a transition fit, or an interference fit. Specifically, in this embodiment, the first mating surface 1141 and the support side surface 1243a are in a clearance fit. This method helps to improve the coaxiality accuracy of the pump cover 11 and the stator assembly 12.

[0074] As a specific implementation, please refer to Figures 3 to 6. The sealing part 27 includes a sealing ring, and the support part 1243 includes an upper support surface 1243b. Along the axial direction of the electric pump, the upper support surface 1243b is close to the first end face 1221a relative to the mounting surface 1241. The upper support surface 1243b can limit the sealing part in the axial direction, which helps to improve the reliability of the sealing part installation.

[0075] To reduce the manufacturing difficulty of the electric pump 100, as a specific embodiment, please refer to Figures 19 to 22. The first side surface 1231 includes a first side surface 1231a, a second side surface 1231b, and a transverse side surface 1231c. Along the axial direction of the electric pump 100, the first side surface 1231a is closer to the pressurization chamber 1422 than the second side surface 1231b. The radial diameter of the first side surface 1231a is smaller than the radial diameter of the second side surface 1231b. The transverse side surface 1231c extends along the radial direction of the electric pump and connects the first side surface 1231a and the second side surface 1231b. The wall surface corresponding to the heat dissipation channel 262 includes the first side surface 1231a and the transverse side surface 1231c. The sealing part 27 is sleeved on the second side surface 1231b and is spring-loaded between the second side surface 1231b and the first mating surface 1141. In this way, while ensuring heat dissipation for the stator winding 122, it is only necessary to ensure the manufacturing precision of the second side section 1231b, which helps to reduce the manufacturing difficulty of the electric pump.

[0076] As one implementation, please refer to Figures 19 to 22. The first side 1231 includes a transverse side 1231c, which extends along the radial direction of the electric pump. The transverse side 1231c connects the first side 1231a and the second side 1231b.

[0077] Please refer to Figures 19 to 28. To further improve the fluidity of the working medium in the heat dissipation channel 262 and enhance the heat dissipation efficiency of the stator winding 122, and to ensure that the working medium surrounding the outer wall portion 123 circulates as much as possible, as one implementation method, the electric pump includes a water-isolating part 265. The water-isolating part 265 is located in the heat dissipation channel 262 and extends along the axial direction of the electric pump. The water-isolating part 265 includes a water-isolating surface 295. A predetermined gap is set between the water-isolating surface 295 and the transverse side 1231c at one end of the water-isolating part 265 in the axial direction. The water-isolating part 265 includes a first sub-part 296 and a second sub-part 297. The first sub-part 296 and the second sub-part 297 are configured to cooperate. One of the first sub-part 296 and the second sub-part 297 is located in the outer wall portion 123, and the other of the first sub-part 296 and the second sub-part 297 is located in the pump cover 11. In this way, firstly, it helps to improve the uniformity of the flow rate of the working medium within the heat dissipation channel 262, which is beneficial for heat dissipation of the stator winding 122. Secondly, it helps to reduce the generation of eddy currents within the heat dissipation channel 262, which is also beneficial for heat dissipation of the stator winding 122.

[0078] As a specific implementation, please refer to Figures 19 to 28. A second sub-part 297 is formed on the outer wall portion 123, and a first sub-part 296 is formed on the pump cover 11. Along the radial direction of the electric pump 100, the first sub-part 296 protrudes from the wall surface corresponding to the pump cover cavity. The second sub-part 297 is formed on the first side surface 1231a. The first sub-part 296 and the second sub-part 297 are correspondingly disposed, and are either in contact or spaced apart. This approach simplifies the structure of the stator assembly 12. For the stator assembly 12, which requires mold manufacturing, this simplifies the injection mold used to manufacture the stator assembly 12, thereby laying a foundation for reducing the cost of the electric pump.

[0079] To further improve the heat dissipation efficiency of the stator winding 122, a plurality of water-blocking sections 265 are provided, which are arranged at predetermined intervals along the circumference of the electric pump. This further reduces the dead water zone within the heat dissipation channel 262.

[0080] As a specific implementation, please refer to Figures 17 to 19. The water-blocking section 265 includes four sections, defined as a first sub-water-blocking section 2651, a second sub-water-blocking section 2652, a third sub-water-blocking section 2653, and a fourth water-blocking section 2654. The pressurizing chamber 1422 includes an inlet 1422a and an outlet 1422b. The first sub-water-blocking section 2651, the second sub-water-blocking section 2652, the third sub-water-blocking section 2653, and the fourth water-blocking section 2654 are arranged sequentially from the inlet 1422a to the outlet 1422b along the circumferential direction of the electric pump 100. Specifically, the first sub-water-blocking section 2651, the second sub-water-blocking section 2652, the third sub-water-blocking section 2653, and the fourth water-blocking section 2654 are arranged sequentially along the direction in which the working medium flows within the pressurizing chamber 1422. It should be noted that the circumferential direction of the pump cover 11 is the same as the circumferential direction of the electric pump, and the circumferential direction of the electric pump is the direction of rotation around the shaft. The pump cover 11 includes a tongue portion 115. The inner side of the tongue portion 115 is the inlet of the pressurization chamber, and the outer side of the tongue portion 115 is the outlet 1422b of the pressurization chamber 1422. The first sub-water-isolating portion 2651 and the fourth sub-water-isolating portion 2654 are distributed on both sides of the inlet 1422a and the outlet 1422b of the pressurization chamber 1422. The first sub-water-isolating portion 2651 is closer to the inlet 1422a of the pressurization chamber 1422 than the fourth sub-water-isolating portion 2654, and the fourth sub-water-isolating portion 2654 is closer to the outlet 1422b of the pressurization chamber than the first sub-water-isolating portion 2651. The second sub-water-isolating portion 2654 is arranged at a predetermined distance from the first sub-water-isolating portion 2651 along the circumference of the pump cover 11. The third sub-water-isolating portion 2654 is arranged at a predetermined distance from the first sub-water-isolating portion 2651. The water-blocking part 2653 is set at a preset distance from the fourth sub-water-blocking part 2654 along the circumference of the pump cover 11. The distance between the water-blocking surface of the second sub-water-blocking part 2652 and the horizontal side surface 1231c is equal to the distance between the water-blocking surface of the fourth sub-water-blocking part 2654 and the horizontal side surface 1231c. The distance between the water-blocking surface of the first sub-water-blocking part 2651 and the horizontal side surface 1231c is less than the distance between the water-blocking surface of the second sub-water-blocking part 2652 and the horizontal side surface 1231c, or the distance between the water-blocking surface of the fourth sub-water-blocking part 2654 and the horizontal side surface 1231c. The distance between the water-blocking surface of the third sub-water-blocking part 2653 and the horizontal side surface 1231c is greater than the distance between the water-blocking surface of the second sub-water-blocking part 2652 and the horizontal side surface 1231c. It should be noted that the distance between the water-proof surface of the second sub-waterproof part 2652 and the horizontal side surface 1231c is equal to the distance between the water-proof surface of the fourth water-proof part 2654 and the horizontal side surface 1231c, which means that within the allowable range of manufacturing tolerances, the distance between the water-proof surface of the second sub-waterproof part 2652 and the horizontal side surface 1231c is equal to the distance between the water-proof surface of the fourth water-proof part 2654 and the horizontal side surface 1231c.The distance between the water-proof surface of the first sub-water-proof section 2651 and the horizontal side surface 1231c is defined as the first distance, the distance between the water-proof surface of the second sub-water-proof section 2652 and the horizontal side surface 1231c is defined as the second distance, the distance between the water-proof surface of the third sub-water-proof section 2653 and the horizontal side surface 1231c is defined as the third distance, and the distance between the water-proof surface of the fourth sub-water-proof section 2654 and the horizontal side surface 1231c is defined as the fourth distance. The value of the first distance is the minimum value relative to the values ​​of the second distance, the third distance, and the fourth distance. This helps to reduce the situation where the working medium at the outlet 1422b of the pressurization chamber enters the heat dissipation channel 262 and returns directly to the inlet 1422a of the pressurization chamber 1422 without circulating along the circumferential direction of the heat dissipation channel 262. The flow path of a portion of the working medium is the first heat dissipation path: a portion of the working medium at the outlet flows back to the pressurization chamber 1422 via a first distance, a second distance, and along the axial direction; the flow path of a portion of the working medium is the second heat dissipation path: a portion of the working medium at the outlet flows back to the pressurization chamber 1422 via a fourth distance and along the axial direction. Thus, working medium flows throughout the entire circumference of the stator winding 122. This has two advantages: First, it helps reduce the dead water zone within the heat dissipation channel 262, thereby improving the heat dissipation efficiency of the stator winding 122. Second, by controlling the lengths of the first sub-water baffle 2651, the second sub-water baffle 2652, the third sub-water baffle 2653, and the fourth sub-water baffle 2654 along the axial direction of the electric pump, it helps to achieve uniform flow velocity of the working medium in the heat dissipation channel 262.

[0081] In one implementation, the electric pump 100 includes a radial extension 1212a and a recessed portion 1212d. The radial extension 1212a includes an upper surface 1212b and a lower surface 1212c. The lower surface 1212c is injection molded and fixed to the first component. The wall surface corresponding to the impeller cavity 142 includes the upper surface 1212b. The recessed portion 1212d is recessed from the upper surface 1212b to the lower surface 1212c. Along the radial direction of the electric pump, the recessed portion 1212d extends to the first side surface 1231 and communicates with the heat dissipation channel 262. This design helps ensure the flow rate of the working medium in the heat dissipation channel 262 returning to the impeller cavity 142 through the recessed portion 1212d. It is understood that when the manufacturing precision of the pump cover 11 or stator assembly 12 is not high, or when the clearance between the pump cover 11 and the radial extension 1212a is too small, or when the pump cover 11 and the radial extension 1212a are in contact, the flow rate of the working medium in the heat dissipation channel 262 returning to the impeller cavity 142 through the recessed portion 1212d will be affected. This approach helps reduce the need for high manufacturing precision in the pump cover 11 or stator assembly 12.

[0082] As one implementation, the recess 1212d includes multiple recesses. Along the circumferential direction of the electric pump, a recess 1212d is provided between two water-blocking parts 265. In a specific embodiment, if there are four water-blocking parts 265, the number of recesses 1212d is three.

[0083] Please refer to Figures 28 to 31. This application also discloses an integrated assembly 200, which includes a flow channel plate assembly 2001 and an electric pump 100. The electric pump 100 includes a pump cover 11 and a stator assembly 12. The pump cover 11 is formed on the flow channel plate assembly 2001. The stator assembly 12 includes a stator housing 121 and a stator winding 122. The stator housing 121 is injection molded with at least the stator winding 122 as an insert. The stator winding 122 is located in the stator housing 121. The pump cover 11 has a pump cover cavity 114. A portion of the stator assembly 12 is located in... The pump cover cavity 114 is sealed to the pump cover 11 and the stator assembly 12. The stator housing 121 includes an outer wall portion 123 located radially outside the stator winding 122 along the radial direction of the electric pump 100. The electric pump 100 includes a heat dissipation channel 262 circumferentially arranged around the stator winding 122. The wall portion corresponding to the heat dissipation channel 262 includes the outer wall portion 123 and a portion of the wall portion corresponding to the pump cover cavity 114. The electric pump 100 includes an impeller cavity 142 connected to the heat dissipation channel 262. This design simplifies the structure of the electric pump and reduces its manufacturing difficulty.

[0084] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are quite detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications without departing from the inventive concept, and these modifications all fall within the protection scope of this invention.

Claims

1. An electric pump (100), characterized in that: The electric pump (100) includes a stator assembly (12), which includes a stator winding (122) and a stator housing (121). The stator assembly (12) includes an outer wall portion (123) and a mounting portion (124). Along the radial direction of the electric pump (100), the outer wall portion (123) is located radially outside the stator winding (122), and the mounting portion (124) protrudes from the outer wall portion (123). The stator winding (122) includes a stator core (1221), which includes a first end face (1221a) and a second end face (1221b). The electric pump (100) includes at least a portion of an inner cavity (14). The pump (100) includes an impeller assembly (152) located in the inner cavity (14). Along the axial direction of the electric pump (100), the first end face (1221a) is close to the impeller assembly (152) relative to the second end face (1221b). The mounting portion (124) includes a mounting surface (1241). Along the axial direction of the electric pump (100), the mounting surface (1241) is disposed close to the second end face (1221b) relative to the first end face (1221a), or the distance between the mounting surface (1241) and the first end face (1221a) is the same as the distance between the mounting surface (1241) and the second end face (1221b).

2. An electric pump (100), characterized in that: The electric pump (100) includes a stator assembly (12), which includes a stator winding (122) and a stator housing (121). The stator winding (122) is located inside the stator housing (121). The stator housing (121) includes an outer wall portion (123) and a mounting portion (124). Along the radial direction of the electric pump (100), the outer wall portion (123) is located radially outside the stator winding (122), and the mounting portion (124) protrudes from the outer wall portion. The mounting part (123) is provided, and the mounting part (124) is fixedly connected to the external component. The external component has a mounting cavity (261). A portion of the electric pump (100) is located in the mounting cavity (261). The outer side wall portion (123) is located in the mounting cavity (261). The stator winding (122) includes a stator core (1221). Along the axial direction of the electric pump (100), at least half of the axial length of the stator core (1221) extends into the mounting cavity (261).

3. The electric pump (100) according to claim 1 or 2, characterized in that: The mounting portion (124) includes an end surface (1242) and a mounting surface (1241). Along the axial direction of the electric pump (100), the end surface (1242) is located away from the first end surface (1221a) relative to the mounting surface (1241). The end surface (1242) constitutes the outer surface of the electric pump (100). Along the axial direction of the electric pump (100), the first end surface (1221a) and the second end surface (1221b) are defined. The center plane between the first reference plane (101) and the second end face (1221b) is the first reference plane (101), and the center plane between the first reference plane (101) and the second end face (1221b) is the second reference plane (102). Along the axial direction of the electric pump (100), the mounting surface (1241) is located between the second reference plane (102) and the second end face (1221b), and the mounting surface (1241) is set closer to the second reference plane (102) than the second end face (1221b).

4. The electric pump according to any one of claims 1 to 3, characterized in that: The mounting portion (124) includes a support portion (1243) and a base portion (1244). Along the axial direction of the electric pump (100), the support portion (1243) is closer to the first end face (1221a) relative to the base portion (1244). The dimension of the support portion (1243) along the radial direction of the electric pump (100) is smaller than the dimension of the base portion (1244) along the radial direction of the electric pump (100). Along the radial direction of the electric pump (100), the radial dimension of the outer side wall portion (123) is smaller than the radial dimension of the support portion (1243). The mounting surface (1241) is formed on the base portion (1244).

5. The electric pump (100) according to claim 4, characterized in that: The electric pump (100) includes a sealing part (27) which is sleeved on the outer side wall part (123). When the electric pump (100) is installed on an external component, the component includes a mounting cavity (261). At least a portion of the outer side wall part (123) is located in the mounting cavity (261). The outer side wall of the sealing part (27) is in sealing contact with the wall corresponding to the mounting cavity (261). Along the radial direction of the electric pump (100), the sealing part (27) is pressed against the wall corresponding to the outer side wall part (123) and the mounting cavity (261).

6. The electric pump (100) according to any one of claims 2 to 5, characterized in that: The electric pump (100) includes a pump cover (11) which is sealed to the stator housing (121). Along the radial direction of the electric pump (100), the dimension of the pump cover (11) in the radial direction is less than or equal to the dimension of the stator housing (121) in the radial direction.

7. The electric pump (100) according to claim 6, characterized in that: The electric pump (100) includes a limiting part (28) formed in the pump cover (11). The rotating assembly (15) includes a rotor assembly (151), which is fixedly connected to the impeller assembly (152) or the rotor assembly (151) and the impeller assembly (152) are integral structural components. The rotating assembly (15) has an inner hole (153), which extends along the... The electric pump (100) extends axially through the rotating assembly (15), the inner hole (153) is sleeved on the shaft (18), one end of the shaft (18) is injection molded and fixed to the second housing (1212), and the other end of the shaft (18) is located at the limiting part (28). The rotating assembly (15) includes a bushing (154), and when the electric pump (100) is working, the end of the bushing (154) abuts against the limiting part (28).

8. The electric pump according to any one of claims 1 to 6, characterized in that: The electric pump (100) includes a limiting part (28), which includes a screw (281) and a washer (282). The rotating assembly (15) includes a rotor assembly (151), which is fixedly connected to the impeller assembly (152) or the rotor assembly (151) and the impeller assembly (152) are integral structural components. The rotating assembly (15) has an inner hole (153). The inner hole (153) is sleeved on the shaft (18) along the axial direction of the electric pump (100). One end of the shaft (18) is injection molded and fixed to the second housing (1212). The rotating assembly (15) includes a bushing (154). The screw (281) passes through the washer (282) and is fixed to the other end of the shaft (18). The radial dimension of the washer (282) is larger than the radial dimension of the inner hole (153).

9. The electric pump (100) according to any one of claims 1 to 8, characterized in that: The stator housing (121) includes a first housing (1211) and a second housing (1212). The first housing (1211) is injection molded with at least the stator winding (122) as an insert. A first component (25) is defined. The first component (25) includes the first housing (1211) and the stator winding (122). The electric pump (100) includes a shaft (18). The second housing (1212) is injection molded with at least the first component (25) and the shaft (18) as inserts. An outer sidewall portion (123) is formed in the second housing (1212). A portion of the outer sidewall portion (123) covers the outer periphery of the first component (25). A mounting portion (124) is formed in the second housing (1212). Along the axial direction of the electric pump (100), the mounting portion (124) is located at the end of the outer sidewall portion (123).

10. A pump assembly (300), characterized in that: The pump assembly (300) includes a pump housing (3001) and an electric pump (100). The pump housing (3001) is sealed to the electric pump (100). The pump housing (3001) includes a pump inlet (3001a), a pump outlet (3001b), and a main body (3002). The pump outlet (3001b) is located radially outside the main body (3002). The pump outlet (3001b) includes a pump outlet (3001d). The pump inlet (3001a) has a pump inlet (3001c). The electric pump (100) includes an inlet (111) and an outlet (112). The pump inlet (3001c) is connected to the inlet (111), and the pump outlet (3001d) is connected to the outlet (112). The main body (3002) includes a mounting cavity (261). The electric pump (100) includes a stator assembly (12), which includes a stator winding (122) and a stator housing (121). The stator assembly (12) includes an outer side wall portion (123) and a mounting portion (124). Along the radial direction of the electric pump (100), the outer side wall portion (123) is located radially outside the stator winding (122). The mounting portion (124) 24) The stator winding (122) is provided protruding from the outer side wall portion (123). The stator winding (122) includes a stator core (1221), the stator core (1221) includes a first end face (1221a) and a second end face (1221b). The electric pump (100) includes at least a portion of the inner cavity (14). The electric pump (100) includes an impeller assembly (152), the impeller assembly (152) is located in the inner cavity (14). Along the axial direction of the electric pump (100), the first end face (1221a) is closer to the impeller assembly (152) than the second end face (1221b). The mounting portion (124) includes a mounting surface (1241) along the axial direction of the electric pump (100). The mounting surface (1241) is disposed relative to the first end face (1221a) and close to the second end face (1221b), or the distance between the mounting surface (1241) and the first end face (1221a) is the same as the distance between the mounting surface (1241) and the second end face (1221b). At least a portion of the outer wall portion (123) is located in the mounting cavity (261), and a portion of the outer wall portion (123) is sealed to the wall portion corresponding to the mounting cavity (261).

11. The pump assembly (300) according to claim 10, characterized in that: The outer wall portion (123) is sealed to the inner wall portion (263). The assembly formed by the electric pump (100) and the inner wall portion (263) is defined as a first assembly (26). The first assembly (26) includes a heat dissipation channel (262). The wall portion corresponding to the heat dissipation channel (262) includes at least a portion of the outer wall portion (123) and at least a portion of the inner wall portion (263). The electric pump (100) includes an inlet (111) and an outlet (112). One end of the heat dissipation channel (262) is connected to the inlet (111), and the other end of the heat dissipation channel (262) is connected to the outlet (112).

12. An integrated component (200), characterized in that: The integrated assembly (200) includes a flow channel plate assembly (2001) and an electric pump (100). The flow channel plate assembly (2001) includes a mounting cavity (261), and the wall portion corresponding to the mounting cavity (261) includes an inner wall portion (263). The electric pump (100) is sealed to the flow channel plate assembly (2001). The electric pump (100) includes a stator assembly (12), and the stator assembly (12) includes stator windings. 122) and stator housing (121), the stator assembly (12) includes an outer sidewall portion (123) and a mounting portion (124), along the radial direction of the electric pump (100), the outer sidewall portion (123) is located radially outside the stator winding (122), the mounting portion (124) is provided protruding from the outer sidewall portion (123), the stator winding (122) includes a stator core (1221), the stator core (1221) and stator housing (1221) are provided. 221) The electric pump (100) includes a first end face (1221a) and a second end face (1221b), the electric pump (100) includes at least a portion of an inner cavity (14), the electric pump (100) includes an impeller assembly (152) located in the inner cavity (14), along the axial direction of the electric pump (100), the first end face (1221a) is closer to the impeller assembly (152) relative to the second end face (1221b), the mounting portion (124) includes a mounting surface (1241), along the axial direction of the electric pump (100), the mounting surface (1241) is disposed closer to the second end face (1221b) relative to the first end face (1221a), or the distance of the mounting surface (1241) from the first end face (1221a) is the same as the distance of the mounting surface (1241) from the second end face (1221b).

13. The integrated component (200) according to claim 12, characterized in that: The outer wall portion (123) is sealed to the inner wall portion (263). The assembly formed by the electric pump (100) and the inner wall portion (263) is defined as a first assembly (26). The first assembly (26) includes a heat dissipation channel (262). The wall portion corresponding to the heat dissipation channel (262) includes at least a portion of the outer wall portion (123) and at least a portion of the inner wall portion (263). The electric pump (100) includes an inlet (111) and an outlet (112). One end of the heat dissipation channel (262) is connected to the inlet (111), and the other end of the heat dissipation channel (262) is connected to the outlet (112).

14. The electric pump (100) according to claim 1, characterized in that: The electric pump (100) includes a pump cover (11) and a stator assembly (12). The pump cover (11) is formed in a pump housing (3001) or a flow channel plate assembly (2001). The pump cover (11) has a pump cover cavity (114). A portion of the stator assembly (12) is located in the pump cover cavity (114), and the pump cover (11) and the stator assembly (12) are sealed together. The stator assembly (12) includes a stator housing (121) and a stator winding (122). The stator winding (122) is located within the stator housing (121). The stator housing (121) includes an outer wall portion (123) along the radial direction of the electric pump (100). The outer wall portion (123) is located within the stator winding (122). The electric pump (100) includes a heat dissipation channel (262) on the radial outer side, the heat dissipation channel (262) is arranged circumferentially around the stator winding (122), the wall corresponding to the heat dissipation channel (262) includes a part of the outer wall (123) and a part of the wall corresponding to the pump cover cavity (114), the electric pump (100) includes a booster chamber (1422), the electric pump (100) includes an impeller assembly (152), the booster chamber (1422) is arranged radially outside the impeller assembly (152) along the radial direction of the electric pump (100), the booster chamber (1422) is arranged circumferentially around the impeller assembly (152), and the booster chamber (1422) is connected to the heat dissipation channel (26).

15. The electric pump (100) according to claim 14, characterized in that: The stator housing (121) is injection molded with at least the stator winding (122) as an insert. The stator housing (121) includes a mounting portion (124). The outer side wall portion (123) includes a first side surface (1231) along the radial direction of the electric pump (100). The mounting portion (124) protrudes from the first side surface (1231). The stator winding (122) includes a stator core (1221). The stator core (1221) includes a first end face (1221a) and a second end face (1221b). The first end face (1221a) is opposite to the stator winding (1222). The second end face (1221b) is close to the pump cover (11). The mounting part (124) includes a mounting surface (1241). Along the axial direction of the electric pump (100), the mounting surface (1241) is disposed relative to the first end face (1221a) and close to the second end face (1221b), or the distance between the mounting surface (1241) and the first end face (1221a) is the same as the distance between the mounting surface (1241) and the second end face (1221b). The wall surface corresponding to the heat dissipation channel (262) includes a portion of the first side surface (1231).

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