CN112804860A - Radiating plate of inversion unit fluid radiator - Google Patents
Radiating plate of inversion unit fluid radiator Download PDFInfo
- Publication number
- CN112804860A CN112804860A CN202110062123.8A CN202110062123A CN112804860A CN 112804860 A CN112804860 A CN 112804860A CN 202110062123 A CN202110062123 A CN 202110062123A CN 112804860 A CN112804860 A CN 112804860A
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- Prior art keywords
- heat dissipation
- fins
- plate
- unit
- flow
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- 239000012530 fluid Substances 0.000 title claims abstract description 22
- 230000017525 heat dissipation Effects 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 235000012431 wafers Nutrition 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a heat dissipation plate of an inversion unit fluid radiator, which comprises a bottom plate, a heat dissipation part arranged on the top surface of a top plate and at least one flow equalizing groove arranged transversely, wherein the heat dissipation part comprises a plurality of fins arranged longitudinally, and the flow equalizing groove transversely penetrates through the heat dissipation part to divide the heat dissipation part into a plurality of heat dissipation areas separated longitudinally. The flow equalizing grooves of the heat dissipation plate eliminate the pressure difference among the fins, break the boundary layers on the surfaces of the fins, enable the flow velocity of fluid among the fins to be uniform, reduce the difference of the heat dissipation capacity of each area of the heat radiator and have good uniformity of heat dissipation effect.
Description
Technical Field
The invention relates to a radiator, in particular to a radiating plate of an inversion unit fluid radiator.
Background
The switching tube of the inverter is a heating device of the inverter unit, and along with the improvement of the power density of the inverter, the heat dissipation of the switching tube of the inverter unit is particularly important, the switching tube of the inverter unit usually adopts a fluid radiator for heat dissipation, and the heat dissipation plate of the fluid radiator usually comprises a bottom plate and a plurality of fins fixed on the bottom plate.
For example, the utility model with the patent number of CN201520828034.X discloses a fin embedded friction welding radiator, which comprises a bottom plate and fins, wherein a plurality of slots are arranged on the bottom plate, and the fins are embedded in the slots through friction welding. The utility model discloses a radiator has following shortcoming: due to factors such as the position of the air inlet, local resistance and the like, even if the distance between the fins is uniform, the flow channels among different fins of the radiator have differences in flow velocity and pressure; the difference of the flow velocity of the flow channels among the fins causes the difference of the heat exchange efficiency of different fins, and the working capacity of the heating device is limited; even if the flow velocity of the flow channels among different fins is the same, when air flows through the narrow flow channels among the fins, a boundary layer is formed on the surfaces of the fins, the deeper the flow channel is, the thicker the boundary layer is, the lower the flow velocity on the surfaces of the fins is, and the poorer the heat exchange efficiency is. That is, the heat dissipation capability of the heat sink along the fins is worse as the fins are farther from the air inlet.
Disclosure of Invention
The invention aims to provide a heat dissipation plate of an inversion unit fluid radiator, which has good heat dissipation effect and uniformity.
In order to solve the technical problems, the invention adopts the technical scheme that the heat dissipation plate of the fluid radiator of the inversion unit comprises a bottom plate, a heat dissipation part arranged on the top surface of a top plate and at least one flow equalizing groove arranged transversely, wherein the heat dissipation part comprises a plurality of fins arranged longitudinally, and the flow equalizing groove transversely penetrates through the heat dissipation part to divide the heat dissipation part into a plurality of heat dissipation areas separated longitudinally.
In the fluid heat dissipation plate, the depth of the flow equalizing groove is equal to the height of the fins.
In the fluid heat dissipation plate, the length of the heat dissipation area along the longitudinal direction is a, and the width of the flow equalization groove along the longitudinal direction is b;
；
wherein the content of the first and second substances,
s is the sectional area of a gas channel between adjacent fins, and the unit is: mm;
q is the flow through the gas passages between adjacent fins, in units: mm/s;
the fluid heat radiation plate has the advantages that as for the water-cooling radiator,
has a value of
，
Has a value of
(ii) a In the case of an air-cooled heat sink,
has a value of
，
Has a value of
。
In the fluid heat dissipation plate, the power device of the inverter unit is mounted on the bottom surface of the bottom plate.
In the fluid heat dissipation plate, the fluid radiator of the inversion unit is an air-cooled radiator or a water-cooled radiator.
The flow equalizing grooves of the fluid radiator radiating plate can eliminate the pressure difference among the fins and break the boundary layers on the surfaces of the fins, so that the flow velocity of fluid among the fins is uniform, the difference of the radiating capacity of each area of the radiator is reduced, and the uniformity of the radiating effect is good.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a front view of a radiating plate of a water-cooled radiator of an inverter unit in embodiment 1 of the present invention.
Fig. 2 is a plan view of a radiating plate of a water-cooled radiator of an inverter unit in embodiment 1 of the present invention.
Fig. 3 is a left side view of the radiating plate of the water-cooled radiator of the inverter unit in embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of the installation of the water-cooled heat sink power device in embodiment 1 of the present invention.
Fig. 5 is a front view of a radiating plate of a water-cooled radiator of an inverter unit in embodiment 2 of the present invention.
Fig. 6 is a left side view of the radiating plate of the water-cooled radiator of the inverter unit in embodiment 2 of the present invention.
Fig. 7 is a plan view of a radiating plate of a water-cooled radiator of an inverter unit according to embodiment 2 of the present invention.
Detailed Description
The fluid radiator of the inversion unit can be an air-cooled radiator or a water-cooled radiator.
The structure of the radiating plate of the water-cooling radiator of the inversion unit in embodiment 1 of the invention is shown in fig. 1 to 4, and comprises a bottom plate 10, a radiating part 20 arranged on the top surface of the top plate, and three flow equalizing grooves 23 arranged transversely. As shown in fig. 4, the inverter unit heating power device is mounted on the bottom surface of the base plate 10.
The heat dissipation part 20 comprises 60 fins 21 arranged along the longitudinal direction, gaps between the adjacent fins 21 are airflow channels 22, and the flow equalizing grooves 23 transversely penetrate through the heat dissipation part 20 to divide the heat dissipation part 20 into 4 heat dissipation areas 20A separated along the longitudinal direction. The depth of the flow equalizing grooves 23 is equal to the height h of the fins 21.
The length of the heat dissipation area 20A along the longitudinal direction is a, the width of the flow equalizing groove 23 along the longitudinal direction is b, and b is more than 0.05 a.
In particular, the present invention relates to a method for producing,
；
；
where S is the cross-sectional area of the gas passage 22 between adjacent fins 21, unit: mm;
q is the flow rate through the gas passages 22 between adjacent fins 21, in units: mm/s;
as shown in fig. 1 to 3, in embodiment 1, the height h =8mm of the fin 21, the width c =2mm of the gas passage 22, the total flow rate through the heat sink is 25L/min,
flow Q = 25/60L/min =6944 mm for a single channel 22 between adjacent fins 21;
the sectional area S =2 × 8=16 mm of the gas passage 22;
therefore, it is
；
In example 1, a is 31mm and b is 2 mm.
The structure of the radiating plate of the water-cooling radiator of the inversion unit in embodiment 2 of the invention is shown in fig. 5 to 7, and is different from embodiment 1 in that the radiating part 20 in embodiment 2 only has 40 fins 21 arranged along the longitudinal direction; as in embodiment 1, the height h =8mm of the fin 21, the width c =2mm of the gas passage 22, the total flow rate through the heat sink is 25L/min,
flow Q = 25/40L/min =10417 mm dry labor/s of a single channel 22 between adjacent fins 21;
S=2x8=16 mm²；
therefore, it is
；
In example 2, a is 48mm and b is 3 mm.
The above examples 1 and 2 are the heat radiation plates of the water-cooled heat radiator, and the heat radiation plate structure of the air-cooled heat radiator is the same as that of the water-cooled heat radiator, but
And
the values of (a) and (b) are different. Air-cooled radiator
Is given by
，
Is given by
。
The above embodiment of the invention has the following beneficial effects:
1) the flow equalizing grooves can eliminate the pressure difference among the fins of the heat dissipation plate, so that the flow velocity of the fluid among the fins is uniform.
2) The flow equalizing grooves can break the boundary layer on the surface of the fin to form a new port, and the fluid starts to form the boundary layer again from the new port.
3) The difference of the heat dissipation capacity of each area of the radiator is small, the capacity of a heating component is equivalent, and the overall capacity of the product is improved; taking the inverter module as an example: the topology of the inversion unit is shown in fig. 4, and the inversion unit has the function of inverting the direct current into three-phase alternating current; the unit internal wafer has the highest working temperature limit, namely the output capacity of the unit is limited by the wafer with the highest temperature; when the upper and lower bridges of the unit are arranged along the direction of the fins, the uneven flow velocity among the fins influences the heat dissipation capacity of each phase, so that the temperature difference of each phase unit is caused, the temperature influences the resistance value in the unit, the uneven current among the phases is caused, and the wafer in the worst heat dissipation area influences the output capacity of the inverter; the temperature difference of the upper and lower bridge wafers is caused along the boundary area formed by the fins, so that the output capacity of the inverter is limited; when three phases of the inverter units are distributed along the fins, the boundary area formed along the fins leads to worse heat dissipation of the area which is farther away from the port area, so that the temperature difference of each phase of the unit is caused, the temperature influences the resistance value inside the unit, the current between each phase is uneven, and the output capacity of the inverter is influenced by the wafer in the worst heat dissipation area; the temperature difference of the upper and lower bridge wafers is caused by the uneven flow velocity among the fins, so that the output capacity of the inverter is limited; after the current-sharing groove is formed, the heat dissipation capacity of each part of the radiator is uniform, so that the current sharing of the output three-phase current is improved, and the output capacity of the inverter is improved.
Claims (6)
1. The utility model provides a heat dissipation plate of contravariant unit fluid radiator, includes the bottom plate and arranges the heat dissipation portion at the roof top surface, and the heat dissipation portion includes the fin of plural number along longitudinal arrangement, and its characterized in that includes at least one transverse arrangement's the recess that flow equalizes, and the recess that flow equalizes transversely link up the heat dissipation portion, separates into a plurality ofly along longitudinal separately heat dissipation district to the heat dissipation portion.
2. The rejector plate of claim 1 wherein the depth of the flow equalization grooves is equal to the height of the fins.
3. The rejector plate of claim 1 wherein the heat dissipating section has a length a in the longitudinal direction and the flow equalizing groove has a width b in the longitudinal direction;
；
wherein the content of the first and second substances,
s is the sectional area of a gas channel between adjacent fins, and the unit is: mm;
q is the flow through the gas passages between adjacent fins, in units: mm/s;
4. the rejector plate of claim 3 wherein, for a water cooled rejector,
has a value of
，
Has a value of
(ii) a In the case of an air-cooled heat sink,
has a value of
，
Has a value of
。
5. The radiating panel as claimed in claim 1, wherein the power devices of the inverter unit are mounted on the bottom surface of the base plate.
6. The cooling plate as claimed in claim 1, wherein the inverter unit fluid heat sink is an air-cooled heat sink or a water-cooled heat sink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110062123.8A CN112804860A (en) | 2021-01-18 | 2021-01-18 | Radiating plate of inversion unit fluid radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110062123.8A CN112804860A (en) | 2021-01-18 | 2021-01-18 | Radiating plate of inversion unit fluid radiator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112804860A true CN112804860A (en) | 2021-05-14 |
Family
ID=75810099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110062123.8A Pending CN112804860A (en) | 2021-01-18 | 2021-01-18 | Radiating plate of inversion unit fluid radiator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112804860A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204425879U (en) * | 2015-03-04 | 2015-06-24 | 北京能高自动化技术股份有限公司 | A kind of partition type forced air cooling radiator |
| CN204534886U (en) * | 2015-02-15 | 2015-08-05 | 海信（山东）空调有限公司 | A kind of radiator and air-conditioner |
| CN105392347A (en) * | 2015-12-19 | 2016-03-09 | 郑州大学 | Segmented fin radiator |
| CN211929478U (en) * | 2020-05-28 | 2020-11-13 | 西安绿电智控科技有限公司 | Air-cooled uniform-temperature radiator |
| CN214481948U (en) * | 2021-01-18 | 2021-10-22 | 深圳市法拉第电驱动有限公司 | Radiating plate of inversion unit fluid radiator |
-
2021
- 2021-01-18 CN CN202110062123.8A patent/CN112804860A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204534886U (en) * | 2015-02-15 | 2015-08-05 | 海信（山东）空调有限公司 | A kind of radiator and air-conditioner |
| CN204425879U (en) * | 2015-03-04 | 2015-06-24 | 北京能高自动化技术股份有限公司 | A kind of partition type forced air cooling radiator |
| CN105392347A (en) * | 2015-12-19 | 2016-03-09 | 郑州大学 | Segmented fin radiator |
| CN211929478U (en) * | 2020-05-28 | 2020-11-13 | 西安绿电智控科技有限公司 | Air-cooled uniform-temperature radiator |
| CN214481948U (en) * | 2021-01-18 | 2021-10-22 | 深圳市法拉第电驱动有限公司 | Radiating plate of inversion unit fluid radiator |
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