CN209787679U - Heat radiation structure and motor controller - Google Patents
Heat radiation structure and motor controller Download PDFInfo
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- CN209787679U CN209787679U CN201821758607.6U CN201821758607U CN209787679U CN 209787679 U CN209787679 U CN 209787679U CN 201821758607 U CN201821758607 U CN 201821758607U CN 209787679 U CN209787679 U CN 209787679U
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- fins
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Abstract
The utility model provides a heat dissipation structure and a motor controller, wherein the heat dissipation structure comprises a water channel shell and a radiator; the radiator comprises a substrate, wherein the substrate is buckled on the water channel shell and forms a cooling liquid channel between the lower surface of the substrate and the upper surface of the bottom plate of the water channel shell; the lower surface of the base plate is provided with a plurality of first fins, the upper surface of the bottom plate of the water channel shell is provided with a plurality of second fins, the distance between the adjacent first fins is larger than the width of the second fins, and the distance between the adjacent second fins is larger than the width of the first fins; when the base plate is buckled on the water channel shell, the first fins and the second fins are distributed in a staggered mode. The utility model discloses a to inserting the first fin and the second fin that distribute in the coolant liquid passageway, improved the radiating efficiency greatly, reduced the flow resistance in the coolant liquid passageway simultaneously.
Description
Technical Field
The utility model relates to a machine controller field, more specifically say, relate to a heat radiation structure and machine controller.
Background
In order to make a motor controller (for example, a motor controller in an electric vehicle) operate efficiently and stably, a case of the motor controller is generally provided with a heat dissipation structure.
Referring to fig. 1, a schematic diagram of a conventional die-casting (typically with a thermal conductivity of 96w/mk) heat dissipation structure at present is shown, the heat dissipation structure includes a cooling liquid channel 13 between the bottom of a case 11 and a heat sink 12, and heat dissipation of heat generating devices on the heat sink 12 is achieved by cooling liquid flowing through the cooling liquid channel 13. Although this heat radiation structure simple structure, nevertheless to the promotion space of heat dispersion limited: in general, to improve the heat dissipation performance, the pitch of the fins, the height of the fins, the flow rate of the coolant, and the like are changed. But is limited by the die conditions, and the fin spacing and the fin height have certain limiting conditions; the increase of the flow rate of the cooling liquid brings the increase of water resistance, and higher requirements are put forward for the performance of the water pump.
As shown in fig. 2, in order to improve the heat dissipation performance, the heat sink 22 for dissipating heat from the heat generating component in the above heat dissipation structure may be replaced with a material with a higher thermal conductivity (thermal conductivity 201w/mk), and the heat sink 22 and the die-cast case 11 are welded by friction stir welding, so as to form the coolant channel 23 between the heat sink 22 and the bottom of the case 11. However, the above structure not only increases the complexity of the manufacturing process, but also increases the cost. In addition, the friction stir welding technology between two different materials is not mature, so that certain use risks exist.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to above-mentioned heat radiation structure's the problem that heat dispersion is limited, the technology is complicated, provides a new heat radiation structure and machine controller.
The technical solution of the present invention to solve the above technical problems is to provide a heat dissipation structure, which includes a water channel housing and a heat sink; the radiator comprises a substrate, wherein the substrate is buckled on the water channel shell and forms a cooling liquid channel between the lower surface of the substrate and the upper surface of the bottom plate of the water channel shell; the lower surface of the base plate is provided with a plurality of first fins, the upper surface of the bottom plate of the water channel shell is provided with a plurality of second fins, the distance between the adjacent first fins is larger than the width of the second fins, and the distance between the adjacent second fins is larger than the width of the first fins; when the base plate is buckled on the water channel shell, the first fins and the second fins are distributed in a staggered mode.
Preferably, the plurality of first fins are perpendicular to the lower surface of the base plate, the plurality of second fins are perpendicular to the upper surface of the bottom plate of the water channel housing, and when the base plate is fastened to the water channel housing, the first fins are parallel to the second fins.
Preferably, the sum of the height of the first fin protruding from the lower surface of the base plate and the height of the second fin protruding from the upper surface of the water channel shell is greater than the distance between the lower surface of the base plate and the upper surface of the water channel shell when the base plate is fastened to the water channel shell.
Preferably, a plurality of retaining walls are arranged on the bottom plate of the water channel shell, the height of the retaining wall protruding out of the bottom plate of the water channel shell is greater than the height of the second fin protruding out of the bottom plate of the water channel shell, and the retaining walls are parallel to the second fin respectively; the plurality of retaining walls divide the water channel shell into a plurality of regions, and each region is provided with at least one second fin.
Preferably, the lower surface of the base plate of the radiator is provided with a plurality of retaining wall grooves corresponding to the retaining walls respectively, and when the base plate is buckled in the water channel shell, each retaining wall is embedded into one retaining wall groove.
Preferably, the height that the retaining wall protrudes from the bottom plate of the water channel shell is not less than 1.5 times the height that the second fin protrudes from the bottom plate of the water channel shell.
Preferably, the vertical cross section of the first fin is U-shaped, and the vertical cross section of the gap between the second fins is U-shaped.
Preferably, the adjacent first fins are equally spaced; the adjacent second fins are equally spaced.
The utility model also provides a motor controller, include the box and install device that generates heat in the box, a serial communication port, motor controller still includes above heat radiation structure, and pass through heat radiation structure does the device heat dissipation that generates heat.
Preferably, the waterway housing is located at a floor of the tank.
The utility model discloses a heat radiation structure and machine controller have following beneficial effect: through first fin and the second fin of cutting graftage distribution in the coolant liquid passageway, improved the radiating efficiency greatly, reduced the flow resistance in the coolant liquid passageway simultaneously.
Drawings
Fig. 1 is a schematic view of a heat dissipation structure in a conventional motor controller;
fig. 2 is a schematic view of a heat dissipation structure in another conventional motor controller;
Fig. 3 is a schematic view of an embodiment of the heat dissipation structure of the present invention;
Fig. 4 is a schematic cross-sectional view of an embodiment of a cooling liquid channel of the heat dissipation structure of the present invention;
FIG. 5 is a partial enlarged view of portion A of FIG. 4;
Fig. 6 is a schematic temperature diagram of a heat generating device that dissipates heat through a conventional heat dissipating structure;
Fig. 7 is a schematic temperature diagram of a heat generating device for dissipating heat by the heat dissipating structure of the present invention;
FIG. 8 is a schematic diagram of the pressure of the cooling fluid in the cooling fluid channel of the prior art heat dissipation structure;
fig. 9 is a schematic view of the pressure of the cooling liquid in the cooling liquid channel of the heat dissipation structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 3-5, the schematic diagrams of the embodiments of the heat dissipation structure of the present invention are shown, and the heat dissipation structure can be applied to a motor controller in an electric vehicle, and can dissipate heat of a heat generating device (e.g., an igbt) to ensure stable operation thereof. The heat dissipation structure of the present embodiment includes a radiator 31 and a water passage housing 32, wherein the water passage housing 32 may be located on the tank 3 (e.g., a tank of the motor controller), and both the radiator 31 and the water passage housing 32 may be formed of an aluminum alloy die-cast member. The radiator 31 includes a base plate 311, the base plate 311 is fastened to the waterway housing 32, and a coolant passage (the base plate 311 is hermetically connected to the waterway housing 32) is formed between a lower surface of the base plate 311 and an upper surface of a bottom plate of the waterway housing 32, that is, the radiator 31 constitutes a cover plate of the coolant passage.
the bottom surface of the base plate 311 has a plurality of first fins 312, the top surface of the bottom plate of the waterway housing 32 has a plurality of second fins 321, and the distance between adjacent first fins 312 is greater than the width of the second fins 321, and the distance between adjacent second fins 321 is greater than the width of the first fins 312. When the base plate 311 is fastened to the waterway housing 32, the first fins 312 and the second fins 321 are distributed in a staggered manner, that is, the first fins 312 are inserted into the gaps between the adjacent second fins 321, and the second fins 321 are inserted into the gaps between the adjacent first fins 312, so as to form an opposite-inserting type heat dissipation tooth structure similar to a labyrinth structure.
The first fins 312 and the second fins 321 which are distributed in the cooling liquid channel in an inserted mode are arranged in the cooling liquid channel, so that the heat dissipation efficiency is greatly improved, and meanwhile, the flow resistance in the cooling liquid channel is reduced.
Moreover, the height of the cooling liquid channel can be controlled by changing the height of the first fins 312 (i.e., the height protruding from the lower surface of the base plate 311) and the height of the second fins 321 (i.e., the height protruding from the upper surface of the bottom plate of the water channel housing 32), so that the height of the cooling liquid channel can be flexibly adjusted, the heat exchange area between the radiator 31 and the cooling liquid is increased, the turbulent flow state of the fluid is improved, and the heat dissipation capability is finally improved. Meanwhile, the height of the first fin 312 and the height of the second fin 321 are adjusted, so that series flow in the cooling liquid channel can be reduced, and the uniformity of flow is ensured.
For convenience of processing and assembly, the first fins 312 may be perpendicular to the lower surface of the base plate 311, the second fins 321 may be perpendicular to the upper surface of the bottom plate of the waterway housing 32, and the first fins 312 may be parallel to the second fins 321 when the base plate 311 is fastened to the waterway housing 32. Further, the pitches between the adjacent first fins 312 are equal; the pitches between the adjacent second fins 321 are also equal.
in particular, in order to reduce the cross flow and improve the heat exchange efficiency between the radiator 31 and the coolant, the sum of the height H of the first fin 312 protruding from the base plate 311 and the height H of the second fin 321 protruding from the upper surface of the water channel housing 32 is greater than the distance between the lower surface of the base plate 311 and the upper surface of the water channel housing 32 when the base plate 311 is fastened to the water channel housing 32. In this way, the first fins 312 can be surely inserted into the gaps between the adjacent second fins 321.
In order to prevent the lateral cross-flow of the coolant in the coolant channel and increase the flow rate of the coolant, the bottom plate of the water channel housing 32 has a plurality of retaining walls 322, the height H' of the retaining walls 322 protruding from the bottom plate of the water channel housing 32 is greater than the height H of the second fins 321 protruding from the bottom plate of the water channel housing 32, and the retaining walls 322 are parallel to the second fins 321. The retaining walls 322 divide the waterway housing 32 into a plurality of regions, and each region has at least one second fin 321. The retaining wall 322 can divide the coolant channel into a plurality of independent and relatively narrow channels, and the coolant in the adjacent channels will not flow in series.
in addition, a plurality of retaining walls 313 corresponding to the retaining walls 322 may be disposed on the lower surface of the substrate 311 of the heat sink 31, and each retaining wall 322 is embedded in one retaining wall 313 when the substrate 311 is fastened to the water channel housing 32. By this structure, the allowance of the retaining wall 322 can be increased.
In particular, to improve the effect of preventing series flow, the height H ' of the retaining wall 322 protruding from the bottom plate of the waterway housing 32 is not less than 1.5 times of the height H ' of the second fin 321 protruding from the bottom plate of the waterway housing 32, i.e. H ' is not less than 1.5H.
The vertical cross section of the first fins 312 may be U-shaped, and accordingly, the vertical cross section of the gaps between the second fins 321 is also U-shaped. Through the structure, the cooling liquid can be ensured to flow smoothly in the cooling liquid channel. Of course, in practical applications, the shape of the first fins 312 and the shape of the gaps between the adjacent second fins 321 may also take other forms.
as shown in fig. 6 to 9, under the same conditions of loss, flow, water inlet temperature and the like, compared with the heat dissipation structure of the above embodiment, the temperature of the heat generating device dissipating heat through the heat dissipation structure of the above embodiment is 2 to 3 ℃ lower than that of the heat generating device in the conventional die-casting heat dissipation structure; the flow resistance of the cooling liquid in the cooling liquid flow channel is reduced by 3.8kPa compared with the flow resistance in the conventional die-casting heat dissipation structure, which greatly improves the performance of the motor controller.
The utility model also provides a motor controller, this motor controller can be applied to electric automobile. The motor controller of this embodiment includes a case, a heat generating device (e.g., an igbt) mounted in the case, and the heat dissipation structure, and dissipates heat for the heat generating device through the heat dissipation structure (the heat generating device is fixed to the upper surface of the substrate 311 of the heat sink 31). Specifically, the waterway housing 32 is located at the floor of the tank (i.e., the waterway housing 32 is part of the tank).
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A heat dissipation structure is characterized by comprising a water channel shell and a radiator; the radiator comprises a substrate, wherein the substrate is buckled on the water channel shell and forms a cooling liquid channel between the lower surface of the substrate and the upper surface of the bottom plate of the water channel shell; the lower surface of the base plate is provided with a plurality of first fins, the upper surface of the bottom plate of the water channel shell is provided with a plurality of second fins, the distance between the adjacent first fins is larger than the width of the second fins, and the distance between the adjacent second fins is larger than the width of the first fins; when the base plate is buckled on the water channel shell, the first fins and the second fins are distributed in a staggered mode.
2. The heat dissipating structure of claim 1, wherein the first plurality of fins are perpendicular to the lower surface of the base plate, the second plurality of fins are perpendicular to the upper surface of the bottom plate of the waterway housing, and the first fins are parallel to the second fins when the base plate is fastened to the waterway housing.
3. The heat dissipating structure of claim 2, wherein a sum of a height of the first fin protruding from the lower surface of the base plate and a height of the second fin protruding from the upper surface of the waterway housing is greater than a distance between the lower surface of the base plate and the upper surface of the waterway housing when the base plate is fastened to the waterway housing.
4. The heat dissipating structure of claim 3, wherein the bottom plate of the water channel housing has a plurality of retaining walls, the retaining walls protrude from the bottom plate of the water channel housing by a height greater than the height of the second fins protruding from the bottom plate of the water channel housing, and the retaining walls are parallel to the second fins respectively; the plurality of retaining walls divide the water channel shell into a plurality of regions, and each region is provided with at least one second fin.
5. The heat dissipating structure of claim 4, wherein the bottom surface of the base plate of the heat sink has a plurality of retaining walls corresponding to the retaining walls, and each retaining wall is embedded in one of the retaining walls when the base plate is fastened to the water channel housing.
6. The heat dissipating structure of claim 4, wherein the height of the retaining wall protruding from the bottom plate of the water channel housing is not less than 1.5 times the height of the second fin protruding from the bottom plate of the water channel housing.
7. The heat dissipating structure of claim 6, wherein the vertical cross-section of the first fins is U-shaped, and the vertical cross-section of the gaps between the second fins is U-shaped.
8. The heat dissipation structure of claim 6, wherein the spacing between adjacent first fins is equal; the adjacent second fins are equally spaced.
9. A motor controller comprises a box body and a heating device arranged in the box body, and is characterized by further comprising a heat dissipation structure according to any one of claims 1-8, and the heat dissipation structure is used for dissipating heat of the heating device.
10. the motor controller of claim 9 wherein said waterway housing is positioned at a floor of said tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821758607.6U CN209787679U (en) | 2018-10-29 | 2018-10-29 | Heat radiation structure and motor controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821758607.6U CN209787679U (en) | 2018-10-29 | 2018-10-29 | Heat radiation structure and motor controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209787679U true CN209787679U (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821758607.6U Active CN209787679U (en) | 2018-10-29 | 2018-10-29 | Heat radiation structure and motor controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209787679U (en) |
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2018
- 2018-10-29 CN CN201821758607.6U patent/CN209787679U/en active Active
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Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215000 52 tianedang Road, Yuexi Town, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |