Motor, motor assembly and vehicle
By designing circuitous flow channels and end spray flow channels in the motor, a cooling medium circulation loop is formed, which solves the problem of poor heat dissipation of the motor end windings and achieves uniform cooling and efficient heat dissipation inside the motor.
Patent Information
- Application Number
- CN202422471302.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-10-12
AI Technical Summary
In existing motors, the heat dissipation conditions of the end windings are poor, resulting in uneven heat distribution inside the motor.
A circuitous flow channel and an end spray flow channel are designed. The cooling medium contacts the stator core through the circuitous flow channel and is directly sprayed to the end winding through the end spray flow channel, forming a cooling medium circulation loop. Heat exchange is achieved using the cooling medium power source and the heat exchanger.
The heat dissipation quality and efficiency of the motor are improved, ensuring uniform temperature distribution inside the motor, preventing large temperature gradients, and meeting the cooling needs of the motor.
Smart Images
Figure CN223334523U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of vehicle control technology, and in particular relates to a motor, a motor assembly and a vehicle. Background Art
[0002] With the rapid development of new energy vehicles, the demand for acceleration performance is becoming increasingly stringent, and correspondingly, the performance requirements for the motors used in these vehicles are also increasing. It should be understood that motors generate a large amount of heat when running at high speeds. Currently, some motors have internal heat dissipation channels with a cooling medium flowing through them to transfer heat to the outside of the motor, thereby maintaining the motor operating at a suitable temperature.
[0003] It should be noted that the stator of the motor includes a stator core and windings. The part of the winding exposed at the axial ends of the stator core is the end winding. The heat generated by the part of the winding located in the stator core can be transferred to the cooling medium in the heat dissipation channel through the stator core, while the heat dissipation conditions of the end windings are poor, resulting in uneven distribution inside the motor. Utility Model Content
[0004] The present application provides a motor, a motor assembly, and a vehicle to solve the technical problem of poor heat dissipation at the end windings of existing motors.
[0005] According to one aspect of the present application, a motor is provided, comprising a housing and a stator. A mounting cavity and an end spray flow channel are provided in the housing, a groove is formed on the inner circumferential wall of the mounting cavity, and the end spray flow channel is located at both axial ends of the groove. The stator comprises a stator core and a winding, wherein the winding protruding from both axial ends of the stator core is the end winding. The stator is arranged in the mounting cavity and fits the inner circumferential wall of the mounting cavity to cooperate with the groove to form a circuitous flow channel; wherein the circuitous flow channel is used for the circulation of cooling medium to cool the stator core, and the end spray flow channel is connected to the circuitous flow channel and surrounds the circumferential outer side of the end winding so as to be able to spray the cooling medium toward the end winding.
[0006] In an optional solution of the present application, the casing is provided with a spray outlet, which is located at both axial ends of the circuitous flow channel and is connected to the installation cavity, and the spray outlets at both ends are located at the bottom of the installation cavity and correspond to the positions of the end windings at both ends; the end spray flow channel is located above the corresponding spray outlet and is formed with a plurality of spray holes, each spray hole being capable of spraying cooling medium toward the end winding.
[0007] In an optional solution of the present application, a plurality of spray holes are arranged at intervals along the circumference of the end spray channel.
[0008] In an optional solution of the present application, the plurality of spray holes are symmetrically arranged on a vertical plane where the axis of the stator is located.
[0009] In an optional solution of the present application, an angle formed by a line connecting two of the outermost spray holes among the multiple spray holes and the axis of the stator is 120° to 240°.
[0010] In an optional solution of the present application, when there are multiple detour flow channels, each detour flow channel surrounds the circumference of the stator core, and the multiple detour flow channels are spaced apart in the axial direction of the stator and connected in sequence.
[0011] In an optional solution of the present application, the circuitous flow channel includes multiple circuitous flow channel units, the multiple flow channel units are arranged to have a smooth transition and are sequentially connected in the circumferential direction of the stator to form a circuitous flow channel, and two adjacent circuitous flow channel units are arranged to have a smooth transition.
[0012] In an optional solution of the present application, each circuitous flow channel unit includes a first non-closed loop flow channel segment and a second non-closed loop flow channel segment, and the first non-closed loop flow channel segment and the second non-closed loop flow channel segment are connected end to end to form a circuitous flow channel unit.
[0013] Another aspect of the present application provides a motor assembly, including a heat exchanger, a cooling medium power source and the above-mentioned motor; the heat exchanger and the cooling medium power source are both arranged outside the casing, the heat exchanger is connected to the detour flow channel and the spray, and the cooling medium power source is connected to the heat exchanger detour flow channel and the end spray flow channel to form a loop for the circulation of the cooling medium.
[0014] According to another aspect of the present application, a vehicle is provided, comprising the above-mentioned motor assembly.
[0015] In summary, the motor, motor assembly, and vehicle provided in this application have at least the following beneficial effects:
[0016] The motor assembly has a circuit for circulating a cooling medium to cool the motor. This circuit includes a cooling medium power source, a heat exchanger, and heat dissipation channels within the motor. The heat dissipation channels include a circuitous channel and an end spray channel. The cooling medium is filled in the heat dissipation channels, and the cooling medium power source provides power for the flow of the cooling medium.
[0017] The circuitous flow channel is connected to the end spray flow channel. The cooling medium flows in the circuitous flow channel and the end spray flow channel under the action of the cooling medium power source. The heat energy absorbed by the cooling medium is exchanged with the outside through the heat exchanger, and then returned to the cooling medium power source to form a loop.
[0018] The circuitous flow channel is formed by a groove in the casing and the stator, and the groove is located on the inner peripheral wall of the cavity of the casing, so that at least part of the cooling medium flowing in the circuitous flow channel can directly contact the stator.
[0019] Specifically, the cooling medium flowing in the circuitous flow channel is in direct contact with the stator core, and the heat generated by the stator core can be directly taken away by the cooling medium in the circuitous flow channel, which greatly improves the heat dissipation quality and efficiency.
[0020] The end spray channels at both ends correspond to the positions of the end windings at both ends, and can spray cooling medium toward the end windings at both ends to achieve the purpose of heat dissipation, thereby reducing the temperature at the end winding positions, preventing large temperature gradients inside the motor, ensuring uniform temperature distribution of the motor, and comprehensive cooling of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.
[0022] Figure 1 A schematic diagram of a motor assembly provided according to one embodiment of the present application;
[0023] Figure 2 for Figure 1 Assembly diagram of the motor and heat exchanger;
[0024] Figure 3 A cross-sectional view of a motor provided according to one embodiment of the present application;
[0025] Figure 4a A schematic diagram of an end spray channel provided according to one embodiment of the present application;
[0026] Figure 4b A schematic diagram of an end spray channel provided according to another embodiment of the present application;
[0027] Figure 4c A schematic diagram of an end spray channel provided according to another embodiment of the present application;
[0028] Figure 5 for Figure 1 A schematic diagram of the housing in FIG.
[0029] Figure 6 for Figure 5 A partial enlarged view of the middle circuitous flow channel.
[0030] The reference numerals are as follows:
[0031] 1000, motor assembly;
[0032] 100. Motor;
[0033] 10. Housing; R. Mounting cavity;
[0034] 20. stator; 21. stator core; 22. end winding;
[0035] D1, circuitous flow channel; D11, first non-closed loop flow channel section; D12, second non-closed loop flow channel section; D2, end spray flow channel; H1, spray hole; H2, spray outlet;
[0036] 200. Heat exchanger; 210. Heat exchange box; 220. Pipe joint. DETAILED DESCRIPTION
[0037] In the description of this application, it should be understood that if terms such as "center", "up", "down", "front", "back", "left", "right", "inside", "outside", "axial", "radial", and "circumferential" appear to indicate orientation or positional relationships, unless otherwise specified, they are understood to be based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.
[0038] Furthermore, the use of "first" or "second" in describing features is for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features identified. Features identified as "first" or "second" may explicitly or implicitly include at least one of the identified features. The use of the word "plurality" generally implies at least two, such as two or three, unless otherwise specifically defined.
[0039] In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration; mechanical connections, electrical connections, direct connections, or indirect connections through an intermediary; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0040] In the description of this specification, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.
[0041] Figure 1 FIG. 1 is a schematic diagram of a motor assembly 1000 provided according to one embodiment of the present application. Figure 2 for Figure 1 Schematic diagram of the assembly of the motor 100 and the heat exchanger 200. Figure 3 This is a cross-sectional view of a motor 100 according to one embodiment of the present application. Figures 1 to 3 In one aspect, the present application provides a motor assembly 1000 , which includes a motor 100 , a heat exchanger 200 , and a cooling medium power source (not shown).
[0042] The motor 100 includes a housing 10 and a stator 20. The housing 10 is provided with an installation cavity R and an end spray flow channel D2. The inner peripheral wall of the installation cavity R is formed with a groove, and the end spray flow channel D2 is located at the axial ends of the groove; the stator 20 includes a stator core 21 and a winding. The axial ends of the winding protruding from the stator core 21 are end windings 22. The stator 20 is arranged in the installation cavity R and fits into the inner peripheral wall of the installation cavity R to cooperate with the groove to form a circuitous flow channel D1.
[0043] The detour flow channel D1 is used for circulating cooling medium to cool the stator core 21 , and the end spray flow channel D2 is connected to the detour flow channel D1 and surrounds the circumferential outer side of the end winding 22 so as to spray cooling medium toward the end winding 22 .
[0044] Furthermore, the heat exchanger 200 and the cooling medium power source are both arranged outside the casing 10, the heat exchanger 200 is connected to the detour flow channel D1, and the cooling medium power source is connected to the heat exchanger 200, the detour flow channel D1 and the end spray flow channel D2 to form a cooling medium circulation loop.
[0045] In this embodiment, the motor assembly 1000 has a circuit for circulating a cooling medium to cool the motor 100. The circuit includes a cooling medium power source, a heat exchanger 200, and a heat dissipation channel within the motor 100. The heat dissipation channel includes a circuitous channel D1 and an end spray channel D2. The cooling medium is filled in the heat dissipation channel, and the cooling medium power source provides power for the flow of the cooling medium.
[0046] The detour flow channel D1 is connected to the end spray flow channel D2. The cooling medium flows in the detour flow channel D1 and the end spray flow channel D2 under the action of the cooling medium power source. The heat energy absorbed by the cooling medium is exchanged with the outside world through the heat exchanger 200, and then returns to the cooling medium power source to form a loop.
[0047] Heat exchanger 200 includes a heat exchange box 210 and a pipe connector 220. Pipe connector 220 connects the heat exchange medium circuit. The cooling medium circuit is located internally within motor 100, while the heat exchange medium circuit is externally located. It should be noted that the cooling medium circuit and the heat exchange medium circuit share heat exchange box 210, are independent of each other, and do not mix. Their primary purpose is to exchange heat within heat exchange box 210 to quickly reduce the internal temperature of motor 100.
[0048] It's important to note that the heat dissipation channels of existing motors are built into the housing, and the cooling medium flowing through them doesn't come into direct contact with the motor's stator. The stator core fits snugly against the inner wall of the housing. During assembly, an air gap exists between the stator core and the inner wall of the housing. Heat generated by the stator core is affected by the thermal resistance of the air gap, making it difficult for the heat dissipation channels built into the housing to dissipate the heat. This results in poor heat dissipation quality and efficiency.
[0049] However, in this embodiment, the detour flow channel D1 is formed by a groove in the housing 10 and the stator 20, and the groove is located on the inner peripheral wall of the cavity R of the housing 10, so that at least part of the cooling medium flowing in the detour flow channel D1 can directly contact the stator 20.
[0050] Specifically, the cooling medium flowing in the circuitous flow channel D1 is in direct contact with the stator core 21 , and the heat generated by the stator core 21 can be directly taken away by the cooling medium in the circuitous flow channel D1 , which greatly improves the heat dissipation quality and efficiency.
[0051] In addition, the end spray channels D2 at both ends correspond to the positions of the end windings 22 at both ends, and can spray cooling medium toward the end windings 22 at both ends to achieve the purpose of heat dissipation, thereby reducing the temperature of the end windings 22, preventing a large temperature gradient from occurring inside the motor 100, ensuring uniform temperature distribution of the motor 100, and comprehensive cooling of the motor 100.
[0052] In a specific application, the cooling medium can be cooling oil. Accordingly, the cooling medium power source is an oil pump, the heat exchanger 200 is an oil cooler, and the heat exchange medium can be water. The heat exchange box 210 has two pipe connectors 220, one of which is the heat exchange medium inlet and the other is the heat exchange medium outlet. Of course, the cooling medium and heat exchange medium can be adjusted according to needs. Applicability can be based on the type of cooling medium and heat exchange medium to select a suitable cooling medium power source and heat exchanger 200.
[0053] Figure 4a Schematic diagram of the end spray channel D2 provided according to one embodiment of the present application. Figure 4b This is a schematic diagram of an end spray channel D2 provided according to another embodiment of the present application. Figure 4c This is a schematic diagram of an end spray channel D2 provided according to another embodiment of the present application.
[0054] See also Figures 3 to 4c In a further optional embodiment, the housing 10 is provided with a spray outlet H2, which is located at both axial ends of the circuitous flow channel D1 and connected to the installation cavity R. The spray outlets H2 at both ends are located at the bottom of the installation cavity R and correspond to the position of the end winding 22.
[0055] The end spray channel D2 is located above the corresponding spray outlet H2 and is formed with a plurality of spray holes H1 . Each spray hole H1 can spray a cooling medium toward the end winding 22 .
[0056] In this embodiment, the end spray channel D2 has a plurality of spray holes H1 , and the cooling medium flowing in the end spray channel D2 can be sprayed toward the end winding 22 through the spray holes H1 to dissipate heat from the end winding 22 .
[0057] A spray outlet H2 is provided on the inner wall of the mounting cavity R of the housing 10. This outlet H2 is located at the bottom, so that the cooling medium sprayed from the spray hole H1 ultimately flows to the bottom spray outlet H2. In a specific application, the spray outlet H2 is connected to the cooling medium power source, that is, the cooling medium can flow back to the cooling medium power source.
[0058] In specific applications, nozzles can be provided in the spray holes H1 to atomize and form cooling medium particles to achieve a better cooling effect. In addition, the structure of multiple spray holes H1 ensures that the flow rate entering the circuitous flow channel D1 is sufficient.
[0059] In a further optional solution, a plurality of spray holes H1 are arranged at intervals along the circumference of the end spray channel D2.
[0060] In this embodiment, a plurality of spray holes H1 are arranged at intervals in the circumferential direction of the spray channel D2 to ensure that the spray formed by the entire end spray channel D2 has a sufficient coverage area to ensure a cooling effect on the end winding 22 .
[0061] In a further optional embodiment, the plurality of spray holes H1 are symmetrically arranged about a vertical plane where the axis of the stator 20 is located.
[0062] In this embodiment, the plurality of spray holes H1 are symmetrically arranged on both sides of the vertical plane where the axis is located, so that the cooling medium flow on both sides of the end winding 22 is substantially equal, which is more conducive to the uniformity of the motor cooling.
[0063] See also Figure 4a In the illustrated embodiment, the number of the spray holes H1 is 9, 4 on each side and 1 directly above.
[0064] In a further optional embodiment, the angle formed by the connection between the two outermost spray holes H1 and the axis of the stator 20 is 120° to 240°.
[0065] In this embodiment, the coverage of the multiple spray holes H1 cannot be less than one-third of the circumference and cannot be greater than two-thirds of the circumference, that is, the coverage of the multiple spray holes H1 is ensured to be appropriate, neither too small nor too large.
[0066] exist Figure 4a In this embodiment, the number of the spray holes H1 is 9, and the coverage range is 120°. Figure 4b In this embodiment, the number of the spray holes H1 is 13, and the coverage range is 180°. Figure 4c In this embodiment, the number of the spray holes H1 is 17, and the coverage range is 240°.
[0067] Figure 4a and Figure 4b Each spray hole H1 in the embodiment is located in the upper half of the end winding 22. Figure 4c Most of the spray holes H1 are located in the upper half of the end winding 22 .
[0068] Figure 5 for Figure 1 See the schematic diagram of the housing 10 in FIG. Figure 5 In some optional embodiments, when there are multiple detour flow channels D1, each detour flow channel D1 surrounds the circumference of the stator core 21, and the multiple detour flow channels D1 are spaced apart in the axial direction of the stator 20 and connected in sequence.
[0069] In this embodiment, when there are multiple detour flow channels D1, each detour flow channel D1 surrounds the circumference of the stator core 21, and multiple detour flow channels D1 are arranged side by side at intervals in the axial direction of the stator 20 to ensure that the entire stator core 21 can be covered.
[0070] exist Figure 5 In the illustrated embodiment, the number of the circuitous flow channels D1 is four, and they are spaced apart and arranged side by side in the axial direction of the stator 20 . Of course, the number of the circuitous flow channels D1 can be designed according to demand.
[0071] In a further optional embodiment, the circuitous flow channel D1 includes multiple circuitous flow channel units, the multiple flow channel units are configured to have a smooth transition and are sequentially connected in the circumferential direction of the stator 20 to form the circuitous flow channel D1, and two adjacent circuitous flow channel units are configured to have a smooth transition.
[0072] In this embodiment, the detour flow channel D1 is composed of a plurality of flow channel units sequentially connected in the circumferential direction of the stator 20. The flow channel units are components of the detour flow channel D1 and are configured to have smooth transitions. The smooth transitions are also adopted between two adjacent flow channel units.
[0073] In other words, the entire circuitous flow channel D1 has no bends, so that the cooling medium can flow more smoothly, reduce the pressure loss of the circuitous flow channel D1, ensure the heat exchange capacity, and effectively improve the performance of the motor 100.
[0074] It should be noted that the smooth transition here means that the position where the direction adjustment occurs in the circuitous flow channel D1 (the angle position) is designed to be an arc angle transition to achieve the purpose of reducing the pressure resistance.
[0075] Figure 6 for Figure 5 A partial enlarged view of the middle detour channel D1. Figure 5 In a further optional embodiment, each circuitous flow channel unit includes a first non-closed loop flow channel segment D11 and a second non-closed loop flow channel segment D12, and the first non-closed loop flow channel segment D11 and the second non-closed loop flow channel segment D12 are connected end to end to form a circuitous flow channel unit.
[0076] In this embodiment, the detour flow channel unit is composed of two non-closed loop flow channel sections connected end to end, one of which is the first non-closed loop flow channel section D11, and the other is the second non-closed loop flow channel section D12. The two are connected end to end and have a smooth transition. Accordingly, the detour flow channel D1 formed by connecting these detour flow channel units is a flow channel with a smooth transition.
[0077] exist Figure 6In the illustrated embodiment, the first non-closed annular flow channel section D11 and the second non-closed annular flow channel section D12 are annular flow channels with the same radius, and the circuitous flow channel unit formed is S-shaped. Of course, the radii of the two non-closed annular flow channel sections can also be different and can be adjusted according to needs.
[0078] In specific applications, the cross-sectional shape of the circuitous flow channel D1 is rectangular, and parameters such as the width, height, and return radius of the flow channel can be optimized to present the optimal flow resistance, thereby ensuring smooth flow of the cooling medium and achieving the purpose of improving the heat dissipation capacity of the motor.
[0079] Another aspect of the present application provides a vehicle having the above-mentioned motor assembly. It should be noted that the vehicles here mainly refer to new energy vehicles, such as pure electric vehicles, extended-range vehicles, plug-in hybrid vehicles, etc. Since the circuitous flow channel D1 in the motor of the above-mentioned motor assembly 1000 has a smooth transition and low flow resistance, the cooling medium flows smoothly to ensure high heat dissipation efficiency; moreover, regardless of the location of the stator core 21 or the location of the end winding 22, there are corresponding flow channels for cooling to prevent large temperature gradients and ensure uniform temperature distribution.
[0080] In this way, the vehicle applies the above-mentioned motor assembly 1000 capable of maintaining an efficient heat dissipation state, providing technical support for the improvement of continuous power and continuous torque to meet the acceleration performance requirements of the vehicle.
[0081] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A motor, characterized in that: include: A housing (10) is provided with a mounting cavity (R) and an end spray flow channel (D2), wherein the inner peripheral wall of the mounting cavity (R) is formed with a groove, and the end spray flow channel (D2) is located at both axial ends of the groove; and The stator (20) comprises a stator core (21) and a winding, wherein the winding protrudes from both axial ends of the stator core (21) as an end winding (22), and the stator (20) is arranged in the installation cavity (R) and fits against the inner peripheral wall of the installation cavity (R) to cooperate with the groove to form a circuitous flow channel (D1); The circuitous flow channel (D1) is used for circulating a cooling medium to cool the stator core (21), and the end spray flow channel (D2) is connected to the circuitous flow channel (D1) and surrounds the circumferential outer side of the end winding (22) so as to be able to spray the cooling medium toward the end winding (22).
2. The motor according to claim 1, characterized in that The housing (10) is provided with spray outlets (H2), the spray outlets (H2) are located at both axial ends of the circuitous flow channel (D1) and are connected to the installation cavity (R), the spray outlets (H2) at both ends are located at the bottom of the installation cavity (R) and correspond to the positions of the end windings (22) at both ends; The end spray channel (D2) is located above the corresponding spray outlet (H2) and is formed with a plurality of spray holes (H1), each of the spray holes (H1) being capable of spraying a cooling medium toward the end winding (22).
3. The motor according to claim 2, characterized in that The plurality of spray holes (H1) are arranged at intervals along the circumference of the end spray channel (D2).
4. The motor according to claim 3, characterized in that The plurality of spray holes (H1) are symmetrically arranged on a vertical plane where the axis of the stator (20) is located.
5. The motor according to claim 4, characterized in that The angle formed by the line connecting the two outermost ones of the plurality of spray holes (H1) and the axis of the stator (20) is 120° to 240°.
6. The motor according to claim 1, characterized in that When there are multiple detour flow channels (D1), each detour flow channel (D1) surrounds the circumference of the stator core (21), and the multiple detour flow channels (D1) are spaced apart in the axial direction of the stator (20) and connected in sequence.
7. The motor according to claim 1, characterized in that The circuitous flow channel (D1) comprises a plurality of circuitous flow channel units, the plurality of flow channel units being arranged to have a smooth transition and being sequentially connected in the circumferential direction of the stator (20) to form the circuitous flow channel (D1), and two adjacent circuitous flow channel units being arranged to have a smooth transition.
8. The motor according to claim 7, characterized in that Each of the circuitous flow channel units comprises a first non-closed loop flow channel section (D11) and a second non-closed loop flow channel section (D12), wherein the first non-closed loop flow channel section (D11) and the second non-closed loop flow channel section (D12) are connected end to end to form the circuitous flow channel unit.
9. A motor assembly, characterized in that: It comprises a heat exchanger (200), a cooling medium power source, and a motor (100) according to any one of claims 1 to 8; The heat exchanger (200) and the cooling medium power source are both arranged outside the casing (10), the heat exchanger (200) is connected to the circuitous flow channel (D1), and the cooling medium power source is connected to the heat exchanger (200), the circuitous flow channel (D1) and the end spray flow channel (D2) to form a loop for the circulation of the cooling medium.
10. A vehicle, characterized in that: Comprising the motor assembly according to claim 9.