CN111132521A - T-shaped longitudinal micro-channel cold plate with inclined channel - Google Patents
T-shaped longitudinal micro-channel cold plate with inclined channel Download PDFInfo
- Publication number
- CN111132521A CN111132521A CN202010018903.8A CN202010018903A CN111132521A CN 111132521 A CN111132521 A CN 111132521A CN 202010018903 A CN202010018903 A CN 202010018903A CN 111132521 A CN111132521 A CN 111132521A
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- 239000000758 substrate Substances 0.000 claims abstract description 4
- 239000000110 cooling liquid Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 9
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011664 nicotinic acid Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
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- 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
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
-
- 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
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a T-shaped longitudinal micro-channel cold plate with an inclined channel. The micro-channel flow channels on the cold plate substrate are longitudinally arranged and are designed in a unit mode, cooling of heat sources with different areas can be achieved by increasing or decreasing micro-channel flow channel units, and meanwhile the defect that the temperature uniformity of the conventional micro-channel which is arranged in a transverse series flow mode is poor can be overcome; the microchannel unit is integrated by a plurality of single microchannels, and inclined channels with certain angles are arranged on the rib walls of the microchannels to realize the mixing in different channels, so that a boundary layer is broken to enhance the mixing so as to strengthen the heat exchange. The invention realizes more uniform and efficient heat dissipation function of the micro-channel cold plate, has the advantages of simple structure and convenient processing, and can be applied to heat dissipation of high-power electronic devices.
Description
Technical Field
The invention belongs to the technical field of electronic information.
Background
With the increasing heat flux density of electronic devices, microchannel cold plates are becoming a common solution for heat dissipation in limited space. The micro-channel cold plate structure can be large or small, a plurality of heat sources can be cooled by one micro-channel cold plate generally for improving the cooling efficiency, the cooling effect is better when the heat sources are distributed regularly, but when the heat sources are distributed more and are dispersed, the cooling effect of the micro-channel cold plate at the position of the part close to the heat sources at the rear part of the flow channel can be obviously weakened. Meanwhile, the arrangement of the flow channel structure of the micro-channel cold plate can also obviously influence the cooling effect. Due to the design and process defects of the micro-channel cold plate, the application of the micro-channel cold plate in the field of heat dissipation of electronic equipment is influenced.
At present microchannel cold drawing runner structure has the rectangle passageway, circular passageway, bionic structure passageway etc. but mainly be the parallel flow channel who uses rectangular cross section in the aspect of engineering design uses, carry out the design improvement on runner size and floor structure, rectangle structure runner simple structure, processing is convenient, but coolant temperature is the gradient along the flow direction and increases, and flow distribution exists inequality in each runner, thereby it is relatively poor to make the cold drawing temperature uniformity of microchannel poor, influence the working property of the regional device in runner rear portion. The bionic structure microchannel cold plate can improve the temperature uniformity of a heat source surface in different degrees, and a butterfly structure provided in the patent of 'a microchannel liquid cooling cold plate' of Du safety and the like can better realize the temperature uniformity of the upper area and the lower area of a flow channel, but the bionic structure microchannel cold plate is still mostly based on the idea of series flow channels, the poor cooling condition of the heat source at the rear part of the flow channel can still occur under the condition of a plurality of heat sources, and the improvement of the temperature uniformity is not fundamentally realized.
Disclosure of Invention
In order to improve the problems of temperature uniformity and uneven flow distribution of a cold plate, the invention is similar to the idea of parallel pipelines, a micro-channel flow channel is designed into a unit module and is connected with a main flow channel in parallel, a heat source at the front part and the rear part of the flow channel can obtain cooling liquid with similar temperature for cooling, the temperature uniformity of a heat source surface is improved, meanwhile, inclined channels are designed on a flow channel rib plate of the micro-channel flow channel unit to be communicated with each micro-channel flow channel, so that the stirring of the cooling liquid is enhanced, the heat exchange efficiency is enhanced, and the effect of further improving the temperature uniformity of the cold plate is achieved.
The invention provides a micro-channel cold plate structure which comprises the following components: the cold plate comprises a cold plate base plate 1 and a cold plate cover plate 2, wherein the cold plate base plate 1 comprises a flow channel inlet 3, a main flow channel 4, at least one longitudinal micro-channel unit 5, a backflow flow channel 6, a flow channel outlet 7 and the like; the longitudinal micro-channel unit 5 is connected with the main channel 4 and the backflow channel 6, and cooling liquid enters from the channel inlet 1, enters the longitudinal micro-channel unit through the main channel 4, and then flows out from the channel outlet 7 through the backflow channel 6. The longitudinal microchannel unit 5 comprises an upper channel 8 and a lower channel 9, the upper channel 8 and the lower channel 9 are symmetrical with respect to the main channel 4, each of the upper channel 8 and the lower channel 9 comprises a plurality of single microchannel flow channels 10, and the rib plate interval of the single microchannel flow channel is provided with at least one group of inclined channels 11, as shown in fig. 1 and 2.
The upper channels 8 and the lower channels 9 in the longitudinal microchannel units 5 may be different in length, but the upper channels in the respective longitudinal microchannel units 5 are the same in length, and the lower channels are the same in length. The upper channel 8 and the lower channel 9 in the single longitudinal microchannel unit 5 can also respectively contain a plurality of microchannel flow passage areas which are mutually separated.
The width of the inclined channel 11 can be the same as that of a single micro-channel flow channel, so that the processing is convenient, the inclined channel can also be any width of 0.2-2mm, and the inclined angle is preferably any angle of 0-90 degrees, so that the flow exchange of cooling liquid in adjacent channels can be better realized. The micro-channel structure can realize parallel distribution of flow in the cold plate, and meanwhile, secondary flow is artificially generated in a certain flow distribution water channel, so that stirring and mixing of the coolant can be realized, and heat exchange is enhanced.
The cold plate base plate 1 and the cold plate cover plate 2 can be made of aluminum alloy, copper, titanium alloy and the like, and the welding method is preferably diffusion welding.
The invention has the beneficial effects that:
1. the parallel flow channel thinking method is adopted, and the inclined channels are arranged to realize the stirring of the cooling liquid between the channels, so that the flowing direction mode of the cooling liquid is changed, the turbulence degree is increased, the thickness of the boundary layer is reduced, and the temperature uniformity and the heat exchange efficiency of the heating surface are improved and strengthened.
2. According to different applied heat loads, the number of the longitudinal micro-channel units can be increased or decreased, corresponding or sparse or dense optimization adjustment can be carried out, and the heat exchanger is suitable for cooling heat sources with different numbers and sizes and high heat flow density.
Drawings
FIG. 1 is a view of the main modules inside a microchannel cold plate.
FIG. 2 is a schematic view of a single microchannel flow channel and an inclined channel.
FIG. 3 is a schematic view of a microchannel cold plate base plate and cover plate.
In the figure: 1-cold plate base plate, 2-cold plate cover plate, 3-flow channel inlet, 4-main flow channel, 5-longitudinal micro-channel unit, 6-backflow flow channel, 7-flow channel outlet, 8-upper channel, 9-lower channel, 10-single micro-channel flow channel, 11-group of inclined channels
Detailed Description
The invention is further described below by way of example with reference to the accompanying drawings.
The structural schematic diagram of the present invention is shown in fig. 1, fig. 2, and fig. 3, and includes a cold plate substrate 1, a cold plate cover plate 2, a flow channel inlet 3, a main flow channel 4, a longitudinal micro channel unit 5, a backflow flow channel 6, a flow channel outlet 7, an upper channel 8, a lower channel 9, a single micro channel flow channel 10, and a group of inclined channels 11. The micro-channel cold plate inner flow channel is processed into a flow channel inlet 3, a main flow channel 4, a longitudinal micro-channel unit 5, a backflow flow channel 6, a flow channel outlet 7, an upper channel 8, a lower channel 9, a single micro-channel flow channel 10, an alternate inclined channel 11 and other structures on a cold plate substrate 1 through milling, cooling liquid enters from the flow channel inlet 3, flows through each longitudinal micro-channel unit 5 through the main flow channel 4, flows through the upper channel 8 and the lower channel 9 in each longitudinal micro-channel unit 5 respectively, heat exchange is carried out on the wall surfaces of each single micro-channel flow channel 10 and a group of inclined channels 11, heat generated by a heat source is taken away, and then flows out of a micro-channel cold plate from the flow channel outlet 7 through the backflow flow channel 6 to take away. The cold plate base plate 1 and the cold plate cover plate 2 are welded together through diffusion welding to form a cold plate whole.
The upper flow channel 8 and the lower flow channel 9 are symmetrical with respect to the main flow channel 4 in one longitudinal microchannel unit 5, and the flow channels of the upper flow channel 8 and the lower flow channel 9 are respectively connected with the return flow channel 6 to realize the outflow of the cooling liquid.
The set of inclined channels 11 may be located anywhere on the channel walls of any single microchannel channel 10 in a longitudinal microchannel unit 5. Any number of single microchannel flow channels 10 may be included in the upper channel 8 and the lower channel 9, and may be increased or decreased according to the actual situation, but the number of the single microchannels in the upper channel 8 and the number of the single microchannels in the lower channel 9 are the same.
In this embodiment, the material used for the microchannel cold plate of the present invention is an aluminum alloy material, and the aluminum alloy material can provide the present invention with good structural properties and thermal conductivity.
Claims (4)
1. A T-shaped longitudinal micro-channel cold plate with inclined channels is characterized in that: the device comprises a cold plate base plate (1) and a cold plate cover plate (2), wherein the cold plate cover plate (2) is used for ensuring the sealing of a flow passage; the cold plate substrate (1) comprises a flow channel inlet (3), a main flow channel (4), at least one longitudinal micro-channel unit (5), a backflow flow channel (6) and a flow channel outlet (7); the longitudinal micro-channel unit (5) is connected with the main flow channel (4) and the backflow flow channel (6), and cooling liquid enters from the flow channel inlet (3), enters the longitudinal micro-channel unit through the main flow channel (4), flows out from the flow channel outlet (7) through the backflow flow channel (6).
2. The T-shaped longitudinal micro-channel cold plate with the inclined channels as claimed in claim 1, wherein: the longitudinal microchannel unit (5) comprises an upper channel (8) and a lower channel (9), the upper channel (8) and the lower channel (9) are symmetrical about the main channel (4), the upper channel (8) and the lower channel (9) both contain a plurality of single microchannel flow channels (10), and rib plates of the single microchannel flow channels are at least provided with a group of inclined channels (11) at intervals.
3. The T-shaped longitudinal micro-channel cold plate with the inclined channels as claimed in claim 1, wherein: the width of a single micro-channel flow channel (10) in the micro-channel cold plate is not more than 1mm, and the hydraulic diameter is not more than 1 mm.
4. The T-shaped longitudinal micro-channel cold plate with the inclined channels as claimed in claim 1, wherein: the group of inclined channels (11) comprises one or more inclined channels, the width of each inclined channel can be 0.2-2mm, and the inclination angle can be 0-90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010018903.8A CN111132521A (en) | 2020-01-08 | 2020-01-08 | T-shaped longitudinal micro-channel cold plate with inclined channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010018903.8A CN111132521A (en) | 2020-01-08 | 2020-01-08 | T-shaped longitudinal micro-channel cold plate with inclined channel |
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| Publication Number | Publication Date |
|---|---|
| CN111132521A true CN111132521A (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010018903.8A Pending CN111132521A (en) | 2020-01-08 | 2020-01-08 | T-shaped longitudinal micro-channel cold plate with inclined channel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112867358A (en) * | 2021-01-18 | 2021-05-28 | 中国船舶重工集团公司第七二四研究所 | Micro-channel cold plate for reducing instability of two-phase flow of parallel flow channel |
| CN113540622A (en) * | 2021-07-09 | 2021-10-22 | 浙江大学 | Two-phase flow cold plate with bionic structure |
| CN116697796A (en) * | 2023-06-12 | 2023-09-05 | 上海应用技术大学 | High-efficiency-ratio temperature control equipment |
| CN116916632A (en) * | 2023-09-08 | 2023-10-20 | 北京航空航天大学 | A microchannel cold plate with staggered shear flow channels and its use method |
| CN118867633A (en) * | 2024-07-25 | 2024-10-29 | 航天恒星科技有限公司 | Phased array antenna and its microchannel heat dissipation structure |
| CN119215800A (en) * | 2023-06-28 | 2024-12-31 | 中国石油化工股份有限公司 | A microchannel reaction device and its application |
Citations (6)
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|---|---|---|---|---|
| CN204497218U (en) * | 2015-03-20 | 2015-07-22 | 中兴通讯股份有限公司 | A kind of liquid cold plate |
| CN107146938A (en) * | 2017-06-19 | 2017-09-08 | 电子科技大学 | A microchannel cold plate structure |
| CN107677152A (en) * | 2017-09-19 | 2018-02-09 | 电子科技大学 | A kind of Micro-channel Liquid-cooling Cold Plate |
| CN207165549U (en) * | 2017-07-06 | 2018-03-30 | 华南理工大学 | A kind of IGBT module liquid cooling plate in parallel based on spout |
| CN107966056A (en) * | 2017-12-26 | 2018-04-27 | 豫新汽车空调股份有限公司 | A kind of liquid cooling plate with inner fin enhanced heat exchange |
| CN209676747U (en) * | 2018-12-28 | 2019-11-22 | 上海毫厘机电科技有限公司 | A kind of water-cooled plate for land wind power system |
-
2020
- 2020-01-08 CN CN202010018903.8A patent/CN111132521A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204497218U (en) * | 2015-03-20 | 2015-07-22 | 中兴通讯股份有限公司 | A kind of liquid cold plate |
| CN107146938A (en) * | 2017-06-19 | 2017-09-08 | 电子科技大学 | A microchannel cold plate structure |
| CN207165549U (en) * | 2017-07-06 | 2018-03-30 | 华南理工大学 | A kind of IGBT module liquid cooling plate in parallel based on spout |
| CN107677152A (en) * | 2017-09-19 | 2018-02-09 | 电子科技大学 | A kind of Micro-channel Liquid-cooling Cold Plate |
| CN107966056A (en) * | 2017-12-26 | 2018-04-27 | 豫新汽车空调股份有限公司 | A kind of liquid cooling plate with inner fin enhanced heat exchange |
| CN209676747U (en) * | 2018-12-28 | 2019-11-22 | 上海毫厘机电科技有限公司 | A kind of water-cooled plate for land wind power system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112867358A (en) * | 2021-01-18 | 2021-05-28 | 中国船舶重工集团公司第七二四研究所 | Micro-channel cold plate for reducing instability of two-phase flow of parallel flow channel |
| CN113540622A (en) * | 2021-07-09 | 2021-10-22 | 浙江大学 | Two-phase flow cold plate with bionic structure |
| CN116697796A (en) * | 2023-06-12 | 2023-09-05 | 上海应用技术大学 | High-efficiency-ratio temperature control equipment |
| CN119215800A (en) * | 2023-06-28 | 2024-12-31 | 中国石油化工股份有限公司 | A microchannel reaction device and its application |
| CN116916632A (en) * | 2023-09-08 | 2023-10-20 | 北京航空航天大学 | A microchannel cold plate with staggered shear flow channels and its use method |
| CN116916632B (en) * | 2023-09-08 | 2023-12-01 | 北京航空航天大学 | A micro-channel cold plate with staggered shear flow channels and its use method |
| CN118867633A (en) * | 2024-07-25 | 2024-10-29 | 航天恒星科技有限公司 | Phased array antenna and its microchannel heat dissipation structure |
| CN118867633B (en) * | 2024-07-25 | 2025-08-08 | 航天恒星科技有限公司 | Phased array antenna and micro-channel heat radiation structure thereof |
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Application publication date: 20200508 |
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