CN211930440U - Motor and cooling structure, vehicle thereof - Google Patents
Motor and cooling structure, vehicle thereof Download PDFInfo
- Publication number
- CN211930440U CN211930440U CN202020388924.4U CN202020388924U CN211930440U CN 211930440 U CN211930440 U CN 211930440U CN 202020388924 U CN202020388924 U CN 202020388924U CN 211930440 U CN211930440 U CN 211930440U
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- flow channel
- axial
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- cooling structure
- electric machine
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- 238000001816 cooling Methods 0.000 title claims abstract description 69
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 230000004323 axial length Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 23
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000003507 refrigerant Substances 0.000 description 7
- 239000002826 coolant Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The disclosure relates to a motor, a cooling structure of the motor and a vehicle. This cooling structure includes the casing of tube-shape and inlet and the liquid outlet of formation on the casing, be formed with the cooling runner in the casing, the cooling runner includes two branch runners, branch runner includes a plurality of axial runner units and a plurality of circumference runner unit, axial runner unit extends along the axial of casing, circumference runner unit extends along the circumference of casing, the both ends of every circumference runner unit all are connected with the axial runner unit, and, the mid point of the axial length of every axial runner unit all is located the same cross section of casing, the entry end of every branch runner links to each other with the inlet, the exit end links to each other with the liquid outlet. The cooling structure comprises two branch flow channels, fluid is divided along the branch flow channels through the liquid inlet, fluid resistance can be effectively reduced, accordingly, the load of a power device for driving the fluid to flow is reduced, energy consumption is low, and production cost and use cost can be effectively saved.
Description
Technical Field
The disclosure relates to the technical field of cooling, in particular to a motor, a cooling structure of the motor and a vehicle.
Background
The permanent magnet synchronous motor is widely applied to electric vehicles by virtue of the advantages of high power density, light weight, small size and the like, and most of the permanent magnet synchronous motors are cooled by adopting a base water cooling mode. The existing cooling structure is generally designed into a spiral water channel and an axial S-shaped water channel, the temperature difference of the spiral water channel at a liquid inlet and a liquid outlet is large, the temperature of the whole water channel is gradually increased in the axial direction, so that the heat dissipation of a motor is uneven, and the spiral water channel has a complex process and high production cost; the water inlet and the water outlet of the axial S-shaped water channel are arranged close to each other, so that heat dissipation is uniform, but the water resistance of the S-shaped water channel is usually large, a high-power water pump needs to be configured, and the energy consumption and the cost of the whole vehicle are increased.
SUMMERY OF THE UTILITY MODEL
An object of the present disclosure is to provide a motor, a cooling structure thereof, and a vehicle, the cooling structure being low in cost and small in water resistance.
In order to realize above-mentioned purpose, this disclosure provides a cooling structure of motor, including the casing of tube-shape and inlet and the liquid outlet of formation on the casing, be formed with the cooling runner in the casing, the cooling runner includes two branch runners, branch runner includes a plurality of axial runner units and a plurality of circumference runner unit, the axial runner unit is followed the axial of casing extends, the circumference runner unit is followed the circumference of casing extends, every the both ends of circumference runner unit all are connected with the axial runner unit to, the mid point of the axial length of every axial runner unit all is located the same cross section of casing, every branch runner's entry end with the inlet links to each other, the exit end with the liquid outlet links to each other.
Optionally, the circumferential flow channel unit is in vertical transition with an adjacent axial flow channel unit, and a plane projection of the circumferential flow channel unit on the circumferential wall of the shell extends in a straight line;
optionally, the circumferential flow channel unit and the adjacent axial flow channel unit are in arc transition, and a plane projection of the circumferential flow channel unit on the circumferential wall of the housing extends in an arc shape.
Optionally, the liquid inlet and the liquid outlet are arranged in a central symmetry in a projection manner on the cross section of the housing, the two branch flow passages are respectively a first branch flow passage and a second branch flow passage, and the first branch flow passage and the second branch flow passage extend from the liquid inlet to the liquid outlet in opposite directions.
Optionally, the first branch flow channel and the second branch flow channel are structurally symmetrical with respect to an axial plane passing through the liquid inlet and the liquid outlet.
Optionally, the cooling runner still includes first sprue and second sprue, first sprue and second sprue all follow the axial extension of casing is arranged, the entry end of first sprue links to each other with the inlet, the exit end of first sprue with the entry end of branch runner links to each other, the entry end of second sprue with the exit end of branch runner links to each other, the exit end of second sprue with the liquid outlet links to each other.
Optionally, the housing includes a first end and a second end opposite to each other, the liquid inlet is disposed at the first end of the housing, and the liquid outlet is disposed at the second end of the housing.
Alternatively, the cross section of the cooling flow passage is formed in a flat rectangular shape.
Another aspect of the present disclosure also provides an electric machine including the cooling structure of the electric machine as described above.
Yet another aspect of the present disclosure also provides a vehicle including the electric machine as described above.
Through the technical scheme, the embodiment of the disclosure provides the cooling structure with low cost and small water resistance. Specifically, this cooling structure includes two branch flow channels, and refrigerant or coolant liquid are shunted along branch flow channel through the inlet, for the technical scheme that only exists single branch water course between inlet and the liquid outlet among the correlation technique, can effectively reduce the fluid resistance after shunting refrigerant or coolant liquid to reduce the load of the power device that the drive fluid flows, consequently need not to dispose powerful power device, the energy consumption is low, can effectively practice thrift manufacturing cost and use cost. And the branch flow channel comprises a plurality of axial flow channel units and a plurality of circumferential flow channel units, the axial flow channel units extend along the axial direction of the shell, the circumferential flow channel units extend along the circumferential direction of the shell, and two ends of each circumferential flow channel unit are connected with the axial flow channel units.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a schematic view of a flow passage of a cooling structure of an electric machine in an embodiment of the present disclosure;
fig. 2 is a schematic view of another perspective of a flow channel of a cooling structure of an electric machine in one embodiment of the present disclosure;
fig. 3 is a side view of a flow passage of a cooling structure of an electric machine in one embodiment of the present disclosure;
fig. 4 is an end view of a flow passage of a cooling structure of an electric machine in an embodiment of the present disclosure;
fig. 5 is a schematic view of a flow passage of a cooling structure of an electric machine in another embodiment of the present disclosure;
fig. 6 is a side view of a flow passage of a cooling structure of an electric machine in another embodiment of the present disclosure.
Description of the reference numerals
1. A liquid inlet; 2. a liquid outlet; 3. branching the flow channel; 31. an axial flow passage unit; 32. a circumferential flow channel unit; 321. a first section circumferential flow channel unit; 322. a tail section circumferential flow passage unit; 33. a first branch flow channel; 34. a second branch flow channel; 4. a first main flow passage; 5. a second main flow passage.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise stated, the terms "inlet" and "outlet" are used in a general sense with respect to the flow direction of a fluid such as a refrigerant or a coolant, and specifically, an opening through which the fluid flows in is an inlet, and an opening through which the fluid flows out is an outlet. Furthermore, the use of terms such as "first," "second," and the like, are intended to distinguish one element from another, and not necessarily to distinguish between sequential or importance terms; unless otherwise specifically defined or limited, the term "coupled" in this disclosure is to be understood broadly, and may be directly coupled, indirectly coupled through an intermediary, or the two elements may be in communication with each other, and the specific meaning of the term in this disclosure may be understood by those skilled in the art according to specific circumstances. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.
The embodiment of the present disclosure provides a cooling structure of a motor, which is used for cooling and dissipating heat of a heat generating component such as a rotor winding and a bearing inside the motor, and the cooling structure may be disposed around an outer peripheral surface of a motor assembly, or may be disposed on an outer peripheral surface of the heat generating component, and the like, which is not limited by the present disclosure. In the embodiment of the present disclosure, as shown in fig. 1 to 6, the cooling structure of the motor includes a cylindrical housing, and a liquid inlet 1 and a liquid outlet 2 formed on the housing, a cooling flow channel is formed in the housing, the cooling flow channel includes two branch flow channels 3, each branch flow channel 3 includes a plurality of axial flow channel units 31 and a plurality of circumferential flow channel units 32, each axial flow channel unit 31 extends in an axial direction of the housing, each circumferential flow channel unit 32 extends in a circumferential direction of the housing, both ends of each circumferential flow channel unit 32 are connected to the axial flow channel units 31, a midpoint of an axial length of each axial flow channel unit 31 is located on the same cross section of the housing, an inlet end of each branch flow channel 3 is connected to the liquid inlet 1, and an outlet end of each branch flow channel is connected to. According to this cooling structure, refrigerant or coolant liquid get into from inlet 1, flow along branch flow path 3 and carry out heat exchange with the part that generates heat, then flow out from liquid outlet 2, refrigerant or coolant liquid can take away the heat of the part that generates heat at the flow in-process to play the effect to the motor heat dissipation cooling.
According to the technical scheme, the cooling structure is low in cost and small in water resistance. Specifically, the cooling structure comprises two branch flow channels 3, the refrigerant or the cooling liquid is divided along the branch flow channels 3 through the liquid inlet 1, and compared with the technical scheme that only a single branch water channel exists between the liquid inlet 1 and the liquid outlet 2 in the related art, the cooling structure can effectively reduce the fluid resistance after dividing the refrigerant or the cooling liquid, thereby reducing the load of a power device (such as a water pump) for driving the fluid to flow, and therefore, the cooling structure does not need to be provided with a high-power device, has low energy consumption, and can effectively save the production cost and the use cost. Moreover, the branch flow channel 3 includes the circumferential flow channel unit 32 and the axial flow channel unit 31, and both ends of each circumferential flow channel unit 32 are connected with the axial flow channel unit 31, and compared with the spiral cooling structure processed by the mold in the related art, the arrangement form of the branch flow channel 3 is more convenient for processing, for example, by adopting the extrusion forming process method with lower cost, which is also beneficial to saving the production cost.
The housing of the cooling structure in the embodiment of the present disclosure is formed into a hollow cylindrical structure so as to accommodate the heat generating component of the motor, and the cooling structure may be an independent structure that is wrapped on the outer surface of the motor housing or the heat generating component, or may be designed integrally with the motor housing. For example, the cooling structure may be designed as a motor housing, and in one embodiment, the housing of the cooling structure may be formed as a double-layer cylindrical structure having an inner wall and an outer wall, a radial gap is maintained between the inner wall and the outer wall, and a cooling flow channel is formed between the inner wall and the outer wall through a water blocking member, so that the housing can serve as a housing to protect internal components of the motor, and can dissipate heat of a heat generating component, thereby facilitating light weight of the motor.
In an alternative embodiment of the present disclosure, as shown in fig. 1 to 3, the axial flow channel unit 31 is mainly used to cover the outer surface of the heat generating component, and the circumferential flow channel unit 32 is mainly used to divert the fluid, so the length of the axial flow channel unit 31 may be greater than that of the circumferential flow channel unit 32, so that the outer surface of the heat generating component is mostly covered by the branch flow channels 3, and the heat dissipation effect is improved.
It should be noted that the density of the axial flow channel units 31 and the circumferential flow channel units 32 can be flexibly set according to actual requirements, and the disclosure is not limited thereto. For example, when the cooling structure is applied to a component with high heat generation, the density of the axial flow channel units 31 and the circumferential flow channel units 32 may be relatively high, that is, the interval between adjacent axial flow channel units 31 may be relatively small, and the length of the circumferential flow channel unit 32 is relatively small; when the cooling structure is applied to a component with low heat generation amount, the density of the axial flow channel units 31 and the circumferential flow channel units 32 may be relatively low, that is, the interval between adjacent axial flow channel units 31 may be relatively large, and the length of the circumferential flow channel unit 32 may be relatively large.
In an embodiment of the present disclosure, as shown in fig. 1 and 3, the circumferential flow channel unit 32 is perpendicular to the adjacent axial flow channel unit 31, and a planar projection of the circumferential flow channel unit 32 on the circumferential wall of the housing is linearly extended, that is, a joint between the circumferential flow channel unit 32 and the axial flow channel unit 31 is substantially at a right angle, which is more convenient for processing and saves processing cost.
In another embodiment of the present disclosure, as shown in fig. 5 and 6, the circumferential flow channel unit 32 is in arc transition with the adjacent axial flow channel unit 31, and the planar projection of the circumferential flow channel unit 32 on the circumferential wall of the housing is extended in an arc shape, so that the resistance of the fluid flow can be effectively reduced, and thus the power consumption of a power device (e.g., a water pump) for driving the fluid flow is reduced, and the use cost is saved.
In the embodiment of the present disclosure, the positions of the liquid inlet 1 and the liquid outlet 2 are arranged at intervals on the peripheral wall of the housing, and the intervals can be flexibly arranged according to the structural characteristics of the motor, for example, the projections of the liquid inlet 1 and the liquid outlet 2 on the cross section of the housing are arranged in central symmetry, so that the peripheral wall of the housing is divided into two cooling areas by the liquid inlet 1 and the liquid outlet 2, the two branch flow channels 3 are respectively a first branch flow channel 33 and a second branch flow channel 34, the first branch flow channel 33 and the second branch flow channel 34 extend from the liquid inlet 1 to the liquid outlet 2 in opposite directions, that is, the first branch flow channel 33 is located in one cooling area, and the second branch flow channel 34 is located in the other cooling area. Compared with a single cooling flow channel surrounding the circumference of the peripheral wall of the housing in the related art, the flow paths of the first branch flow channel 33 and the second branch flow channel 34 in the present disclosure are shorter, which is beneficial to discharging the heat exchanged coolant or cooling liquid in time, so as to improve the cooling efficiency.
Further, the first branch flow channel 33 and the second branch flow channel 34 are symmetrical in structure relative to an axial plane passing through the liquid inlet 1 and the liquid outlet 2, so that fluid in the first branch flow channel 33 and the fluid in the second branch flow channel 34 synchronously flow at a constant speed, impact force generated on the shell when the fluid flows is balanced, damage to the shell due to unbalance loading is prevented, and the service life of the cooling structure is prolonged.
Further, as shown in fig. 1 and 2, in the whole cooling system, the external pipe is communicated with the flow passage through the liquid inlet 1 or the liquid outlet 2, because the section of the liquid inlet 1 or the liquid outlet 2 is changed, the fluid can have unstable flowing state and easy turbulence when passing through the liquid inlet 1 or the liquid outlet 2, therefore, in the embodiment of the present disclosure, flow stability of fluid is improved by providing the main flow channel, specifically, the cooling flow channel further includes a first main flow channel 4 and a second main flow channel 5, the first main flow channel 4 and the second main flow channel 5 are both arranged along the axial extension of the housing, an inlet end of the first main flow channel 4 is connected to the liquid inlet 1, an outlet end of the first main flow channel 4 is connected to an inlet end of the branch flow channel 3, an inlet end of the second main flow channel 5 is connected to an outlet end of the branch flow channel 3, and an outlet end of the second main flow channel 5 is connected to the liquid outlet 2. The first main flow channel 4 can provide buffer for the fluid flowing from the liquid inlet 1, and the fluid enters the first branch flow channel 33 and the second branch flow channel 34 after flowing stably in the first main flow channel 4; further, since the fluids merged from the junction of the first branch flow passage 33 and the second branch flow passage 34 may collide with each other and generate turbulence, the merged fluids are buffered by the second main flow passage 5, so that they are relatively smooth and fluent when discharged.
It should be noted that, in addition to the first main flow channel 4 and the second main flow channel 5, circumferential flow channel units 32 are respectively connected to both ends of each axial flow channel unit 31 of the branch flow channel, so that the branch flow channels are sequentially arranged according to the rule of the circumferential flow channel unit 32, the axial flow channel unit 31, the other circumferential flow channel unit 32, and the other axial flow channel unit 31.
In addition, in an embodiment of the present disclosure, as shown in fig. 1 and fig. 2, the housing includes a first end and a second end opposite to each other, the first end and the second end are defined based on an axial direction of the housing, that is, for a cylindrical housing, two opposite end surfaces along the axial direction are the first end and the second end, respectively, the liquid inlet 1 is disposed at the first end of the housing, and the liquid outlet 2 is disposed at the second end of the housing, so that the liquid inlet 1 and the liquid outlet 2 are arranged in a staggered manner in the axial direction of the housing, so that when the motor is mounted and placed in any orientation, a water head difference is generated between the liquid inlet 1 and the liquid outlet 2, thereby promoting fluid flow and saving energy consumption.
In addition, the cross-sectional shape of the flow channel (e.g., the branch flow channel 3 or the main flow channel, etc.) in the embodiments of the present disclosure may be tubular, flat, or other shapes, which the present disclosure does not limit. For example, the cross section of the cooling flow channel is formed in a flat rectangular shape, which requires relatively low shape requirements for the housing.
Another embodiment of the present disclosure also provides a motor including the cooling structure of the motor as described above, which is low in cost and energy consumption.
In addition, the vehicle comprises the motor, and the use of the motor can reduce the cost of the whole vehicle and improve the competitiveness of the product.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A cooling structure of a motor is characterized by comprising a cylindrical shell, a liquid inlet (1) and a liquid outlet (2) which are formed on the shell, a cooling flow passage is formed in the shell and comprises two branch flow passages (3), the branch flow channel (3) comprises a plurality of axial flow channel units (31) and a plurality of circumferential flow channel units (32), the axial flow channel units (31) extend along the axial direction of the shell, the circumferential flow channel units (32) extend along the circumferential direction of the shell, the two ends of each circumferential flow channel unit (32) are connected with the axial flow channel units (31), and the middle point of the axial length of each axial flow channel unit (31) is positioned on the same cross section of the shell, the inlet end of each branch flow channel (3) is connected with the liquid inlet (1), and the outlet end of each branch flow channel is connected with the liquid outlet (2).
2. The cooling structure of an electric machine according to claim 1, wherein the circumferential flow path unit (32) is vertically transited to an adjacent axial flow path unit (31), and a planar projection of the circumferential flow path unit (32) on a peripheral wall of the housing is linearly extended.
3. The cooling structure of an electric machine according to claim 1, characterized in that the circumferential flow channel unit (32) is in arc transition with an adjacent axial flow channel unit (31), and a planar projection of the circumferential flow channel unit (32) on the peripheral wall of the housing extends in an arc.
4. The cooling structure of an electric machine according to claim 1, wherein the liquid inlet (1) and the liquid outlet (2) are arranged in a central symmetry in a projection on a cross section of the housing, and the two branch flow passages (3) are a first branch flow passage (33) and a second branch flow passage (34), respectively, and the first branch flow passage (33) and the second branch flow passage (34) extend from the liquid inlet (1) to the liquid outlet (2) in opposite directions to each other.
5. The cooling structure of an electric machine according to claim 4, characterized in that the first branch flow passage (33) and the second branch flow passage (34) are symmetrical in structure with respect to an axial plane passing through the inlet port (1) and the outlet port (2).
6. The cooling structure of an electric machine according to any one of claims 1-5, characterized in that the cooling flow channel further comprises a first main flow channel (4) and a second main flow channel (5), the first main flow channel (4) and the second main flow channel (5) are both arranged along the axial extension of the housing, the inlet end of the first main flow channel (4) is connected to the liquid inlet (1), the outlet end of the first main flow channel (4) is connected to the inlet end of the branch flow channel (3), the inlet end of the second main flow channel (5) is connected to the outlet end of the branch flow channel (3), and the outlet end of the second main flow channel (5) is connected to the liquid outlet (2).
7. The cooling structure of an electric machine according to any one of claims 1-5, characterized in that the housing comprises a first end and a second end opposite to each other, the liquid inlet (1) being arranged at the first end of the housing and the liquid outlet (2) being arranged at the second end of the housing.
8. The cooling structure of an electric machine according to any one of claims 1 to 5, wherein the cross section of the cooling flow passage is formed in a flat rectangular shape.
9. An electric machine, characterized in that the electric machine comprises a cooling structure of the electric machine according to any one of claims 1-8.
10. A vehicle, characterized in that the vehicle comprises an electric machine according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020388924.4U CN211930440U (en) | 2020-03-24 | 2020-03-24 | Motor and cooling structure, vehicle thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020388924.4U CN211930440U (en) | 2020-03-24 | 2020-03-24 | Motor and cooling structure, vehicle thereof |
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| Publication Number | Publication Date |
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| CN211930440U true CN211930440U (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020388924.4U Expired - Fee Related CN211930440U (en) | 2020-03-24 | 2020-03-24 | Motor and cooling structure, vehicle thereof |
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| Country | Link |
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| CN (1) | CN211930440U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078774A (en) * | 2021-02-24 | 2021-07-06 | 爱驰汽车（上海）有限公司 | Cooling structure and driving device |
| CN113300529A (en) * | 2021-06-29 | 2021-08-24 | 智新科技股份有限公司 | Water-cooling shell of motor |
| CN114309680A (en) * | 2022-01-13 | 2022-04-12 | 珠海格力电器股份有限公司 | Cooling assembly and electric spindle with same |
| CN114448136A (en) * | 2021-12-22 | 2022-05-06 | 华南理工大学 | Motor with multiple cooling flow channels |
-
2020
- 2020-03-24 CN CN202020388924.4U patent/CN211930440U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078774A (en) * | 2021-02-24 | 2021-07-06 | 爱驰汽车（上海）有限公司 | Cooling structure and driving device |
| CN113300529A (en) * | 2021-06-29 | 2021-08-24 | 智新科技股份有限公司 | Water-cooling shell of motor |
| CN114448136A (en) * | 2021-12-22 | 2022-05-06 | 华南理工大学 | Motor with multiple cooling flow channels |
| CN114309680A (en) * | 2022-01-13 | 2022-04-12 | 珠海格力电器股份有限公司 | Cooling assembly and electric spindle with same |
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Denomination of utility model: Motor and its cooling structure, vehicle Effective date of registration: 20211213 Granted publication date: 20201113 Pledgee: BEIJING AUTOMOTIVE GROUP Co.,Ltd. Pledgor: Beijing baowo Automobile Co.,Ltd. Registration number: Y2021990001167 |
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Date of cancellation: 20230925 Granted publication date: 20201113 Pledgee: BEIJING AUTOMOTIVE GROUP Co.,Ltd. Pledgor: Beijing baowo Automobile Co.,Ltd.|Borgward Automotive (China) Co., Ltd. Registration number: Y2021990001167 |
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Granted publication date: 20201113 |