CN116666330A - Microchannel radiator with oval ribs and gradual change type pin fins - Google Patents
Microchannel radiator with oval ribs and gradual change type pin fins Download PDFInfo
- Publication number
- CN116666330A CN116666330A CN202310764678.6A CN202310764678A CN116666330A CN 116666330 A CN116666330 A CN 116666330A CN 202310764678 A CN202310764678 A CN 202310764678A CN 116666330 A CN116666330 A CN 116666330A
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- China
- Prior art keywords
- micro
- channel
- gradual change
- ribs
- change type
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- 230000008859 change Effects 0.000 title abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 239000011295 pitch Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 18
- 239000012530 fluid Substances 0.000 abstract description 6
- 230000001965 increasing effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 206010035148 Plague Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
- H01L23/473—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing liquids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The invention discloses a microchannel radiator with elliptical ribs and gradual change type needle fins, which comprises a heat source 1, an upper cover plate 2, a microchannel with elliptical ribs, a lower substrate 3 with gradual change type needle fins, a working medium inlet 4 and a working medium outlet 5, wherein the microchannel channel is arranged on the lower substrate. The micro-channel comprises a plurality of straight rectangular micro-channels, elliptical ribs are arranged on the wall surface of the micro-channel, and the elliptical ribs are symmetrically distributed on two sides of the micro-channel; the gradual change type pin fins are arranged on the lower substrate and gradually distributed in the middle of the micro-channel according to a rule from small to large, and the intervals among the pin fins are equal. In the working medium flowing process, the elliptical ribs enlarge the convection heat exchange area, and meanwhile, fluid is caused to present a convergent-divergent flowing rule, so that the flowing speed is increased; the gradual change type needle fin plays a role of turbulence, and secondary flow is formed at a local position, so that mixing of cooling working media is promoted, the overall heat conduction capacity of the radiator is enhanced, and pressure drop loss is improved through gradual change layout.
Description
Technical Field
The invention belongs to the field of heat dissipation of microelectronic high-power devices, in particular to a microchannel heat radiator with oval ribs and gradual-change pin fins, which is a structural design scheme capable of meeting the cooling problem of high-heat-generation equipment such as electronic chips and the like.
Background
With the increasing integration of electronic products, the number of semiconductors in integrated circuits is increasing, and the problem of overheating of integrated chips is a core problem that plagues chip performance and stability. Therefore, developing an efficient cooling solution is a primary task.
The main heat dissipation modes of the current electronic device are air convection, liquid convection, boiling heat dissipation, jet impact cooling, micro-channel cooling and spray cooling. In these cooling modes, the air cooling capacity is low, and the heat dissipation requirement of the integrated circuit with high heat flux density cannot be met. Traditional liquid convection heat dissipation requires space and is not suitable for applications with limited volume. Jet impact and spray cooling are too complex and are not suitable for chip heat dissipation, and the microchannel cooling technology has the advantages of compact structure, large convective heat exchange area, light weight and the like.
Disclosure of Invention
In order to achieve the above objects and functions, the present invention aims to provide a micro-channel heat sink with oval ribs and gradual-change pin fins, which can improve the hot spot problem and strengthen the heat dissipation performance.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a micro-channel radiator with oval ribs and gradual change type pin fins comprises the following main components: the micro-channel structure comprises an upper cover plate, a lower substrate, micro-channels with oval ribs and gradual-change needle fins.
The lower substrate is provided with a concave accommodating space, a plurality of parallel micro-channels with elliptical ribs and gradual change type needle fins are arrayed in the concave accommodating space, a main working area of the micro-channel radiator is formed, and the micro-channel radiator comprises a working medium inlet and a working medium outlet.
The micro-channels comprise symmetrical elliptical ribs and are arranged at the same intervals, so that the cooling working medium is enabled to form a converging-diverging motion rule, the flow velocity is caused to change, the contact area between the wall surface and the fluid is increased, and the convection heat exchange capacity is improved. In the flowing process, fluid retention and secondary flow can be generated on one side of each oval rib, so that the growth of a thermal boundary layer is broken, and the heat dissipation efficiency is improved.
The gradual change type square fins are uniformly distributed in the middle of the flow channel according to a rule from small to large, the fluid pressure close to the inlet is high in flow rate, the diameter of the needle fin is small, and the influence on the fluid pressure is small; when approaching the outlet, the diameter of the needle fin is large, so that the pressure intensity of fluid can be properly enhanced, and the gradual change type needle fin layout is beneficial to reducing the influence of uneven pressure drop of the flow passage. The pin fin forces the cooling working medium to flow and break, and causes secondary flow, thereby playing the roles of destroying the growth of a thermal boundary layer, enhancing the mixing of the cooling working medium and improving the heat exchange capability.
Compared with the traditional micro-channel radiator, the heat radiating device has the following advantages: for the conventional micro-channel radiator (see fig. 1), as the distance from the inlet increases, the thermal boundary layer of the cooling medium continuously grows and develops, so that the heat dissipation effect is reduced, and the conventional micro-channel radiator has defects of uneven flow velocity distribution, insufficient temperature uniformity, different pressure distribution and the like. According to the invention, the wall microstructure and the pin fin similar to the turbulent flow column are introduced on the basis of the traditional microchannel, so that the effective convection heat exchange area of the cooling working medium is increased, the boundary layer is destroyed, the movement mixing of the working medium is promoted, the gradual change type pin fin improves the pressure distribution, and the heat dissipation capacity is enhanced.
The invention effectively improves the heat dissipation efficiency of the micro-channel fluid, increases the heat convection area of the cooling working medium and the flow channel, damages the growth of a thermal boundary layer, reduces the transition Reynolds number, improves the flow uniformity of the cooling working medium, and solves the heat dissipation problem of the high-power chip.
Drawings
Fig. 1 is a schematic diagram of a conventional microchannel heat sink.
Fig. 2 is a schematic structural view of an embodiment of the present invention.
Fig. 3 is a schematic view of a micro-channel with oval ribs and graded pin fins.
Fig. 4 is an elevation view of a micro-channel with oval ribs and graded needle fins.
Detailed Description
The invention is further described in detail for the purpose of making the objects, technical proposal and advantages of the invention more clear and intuitive. The description herein is only intended to illustrate the invention and not to limit the invention, as far as the specific examples are concerned.
Described in this embodiment is a microchannel heat sink with elliptical ribs and graded pin fins, as shown in fig. 2. The micro-channel structure schematic diagram is shown in fig. 3, and the micro-channel radiator with elliptical ribs and gradual change type needle fins consists of a heat source 1, an upper cover plate 2, a lower substrate 3 with micro-channels, a working medium inlet 4 and a working medium outlet 5.
Referring to fig. 3, the schematic diagram of the micro-channel with elliptical ribs and gradual change type pin fins includes a lower substrate 3-1 without micro-channels, micro-channels 3-2 with elliptical ribs, square pin fins 3-3 in the micro-channels, the size and the number of flow channels of the micro-channels and the layout thereof depend on the actual heat source size and heat flow density, and the elliptical ribs and the square pin fins do not interfere with each other and keep a certain distance.
Referring to fig. 4, in the front view of the micro-channel with oval ribs and gradual change type needle fins, the space between the oval ribs and gradual change type needle fins in the micro-channel is equal, and the oval ribs are symmetrically distributed on two sides of the micro-channel and have the same size; the gradual change square pin fin is uniformly arranged in the center of the micro-channel from small to large according to the diameter of the pin fin, and the gradual change rule is that the gradual change rule is equal to the width-to-diameter ratio of the micro-channel (width is 0.8 mm) to 1:4,1:2.67,1:2, the diameters of the corresponding needle fins are respectively 0.2 mm, 0.3 mm and 0.4 mm.
Referring to fig. 2, the cross section of the micro-channel is in the order of micrometers, the cooling working medium adopts deionized water, and the cooling working medium flows in from the water inlet and flows out from the water outlet.
It will be readily appreciated by those skilled in the art that the foregoing is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, and improvements may be made within the spirit and principles of the invention.
Claims (5)
1. A micro-channel radiator with elliptical ribs and gradual-change needle fins is characterized by comprising a heat source, an upper cover plate, a lower base plate, micro-channels with elliptical ribs and gradual-change needle fins.
2. The micro-channel heat sink with elliptical ribs and graded pin fins according to claim 1, wherein the micro-channel heat sink has a width of 0.8 mm and a height of 0.7 mm, and is an array of flat rectangular micro-channels on an underlying substrate.
3. The microchannel heat sink with elliptical ribs and graded pin fins according to claim 1, wherein the elliptical ribs are symmetrically arranged on two side walls of the microchannel, and the size and spacing of each elliptical rib are equal.
4. The micro-channel radiator with elliptical ribs and graded pin fins according to claim 1, wherein the graded pin fins are distributed in the center of the micro-channel from small to large according to the ratio of the width to the diameter of the micro-channel (1:4, 1:2.67, 1:2), and the pitches are equal.
5. The micro-channel heat sink with elliptical ribs and graded pin fins according to claim 1, wherein the graded pin fins have a rectangular cross-sectional shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310764678.6A CN116666330A (en) | 2023-06-27 | 2023-06-27 | Microchannel radiator with oval ribs and gradual change type pin fins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310764678.6A CN116666330A (en) | 2023-06-27 | 2023-06-27 | Microchannel radiator with oval ribs and gradual change type pin fins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116666330A true CN116666330A (en) | 2023-08-29 |
Family
ID=87722474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310764678.6A Pending CN116666330A (en) | 2023-06-27 | 2023-06-27 | Microchannel radiator with oval ribs and gradual change type pin fins |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116666330A (en) |
-
2023
- 2023-06-27 CN CN202310764678.6A patent/CN116666330A/en active Pending
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