CN216482394U - Split-confluence type rectangular micro-channel heat exchanger system - Google Patents
Split-confluence type rectangular micro-channel heat exchanger system Download PDFInfo
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- CN216482394U CN216482394U CN202123087759.2U CN202123087759U CN216482394U CN 216482394 U CN216482394 U CN 216482394U CN 202123087759 U CN202123087759 U CN 202123087759U CN 216482394 U CN216482394 U CN 216482394U
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- 239000000758 substrate Substances 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004377 microelectronic Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- -1 silicon Chemical compound 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention discloses a split-confluence type rectangular microchannel heat exchanger system, belongs to the technical field of heat dissipation, and solves the problem that the heat exchange effect is inhibited when a thermal boundary layer of a flowing working medium is fully developed. The system comprises a micro-channel substrate, and is characterized in that: the microchannel substrate comprises a plurality of microchannels which are arranged in parallel at intervals in an array mode, the cross section of each microchannel along the height direction is rectangular, and any two adjacent microchannels of the microchannels are periodically and alternately arranged with a plurality of shunting-converging microchannels, so that the heat exchange area can be remarkably increased, the normal flow of fluid is damaged, the turbulent flow is enhanced, and the heat exchange is enhanced. Meanwhile, the initial part of the shunting-converging micro-channel is set to be a round angle so as to reduce the pressure loss.
Description
Technical Field
The invention belongs to the technical field of heat dissipation, and particularly relates to a micro-channel heat radiator.
Background
Micro devices, such as micro reactors, micro mixers, micro fluidic chips, micro electro mechanical systems, etc., are widely used in the fields of biomedical, electronic information, optical conduction, etc. due to their advantages of small size, high integration degree, etc. The size of electronic devices is gradually reduced, the integration level is gradually increased, which leads to the rapid increase of heat flux density under unit size, after high-density packaging, the heat dissipation problem in a microelectronic system is more and more prominent, and the thermal failure caused by high temperature becomes the most main reason of the reliability reduction and even failure of the microelectronic system. The microchannel radiator is an effective means for solving the problem of high heat flux density of a micro device, is mainly processed in metal bases such as aluminum and copper or semiconductors such as silicon, is usually in a rectangular, triangular and trapezoidal structure, and can inhibit the heat exchange effect when a thermal boundary layer of a flowing working medium is fully developed. The flow distribution structure can increase the heat exchange area, damage the normal flow of fluid, interrupt the development of a thermal boundary layer of a cooling working medium and enhance turbulent flow, thereby improving the heat transfer effect of the microchannel radiator.
Disclosure of Invention
The invention aims to provide a branch-confluence type rectangular micro-channel heat exchanger system, wherein a branch structure can destroy the normal flow of fluid, interrupt the development of a thermal boundary layer of a cooling working medium, enhance turbulent flow, increase the heat exchange area and realize enhanced heat exchange.
The invention is realized by the following technical scheme:
a split-confluence rectangular microchannel heat exchanger system comprises a microchannel substrate, wherein a plurality of microchannels which are arranged in parallel and spaced array are arranged on the microchannel substrate, and any two adjacent microchannels of the microchannels are periodically arranged in a staggered manner to form a plurality of split-confluence microchannels. The cross section of the micro-channel along the height direction is rectangular, the cross section of the flow dividing-converging micro-channel is also rectangular, and the height of the flow dividing-converging micro-channel is the same as that of the main channel. An included angle exists between the shunting-converging micro-channel and the horizontal plane, and the horizontal included angle theta of the shunting-converging micro-channel is 30-75 degrees; a plurality of shunting-converging micro-channels are periodically and alternately distributed, and the distance h between the center section of shunting and the center section of converging is 2-5 mm; the cross section of the main runner is reduced after the flow is split, and the cross section of the main runner is increased after the flow is converged and meets the Murray law; the flow dividing-converging micro-channel is provided with a round angle at the initial section of flow dividing and converging.
The micro-channel material is one of aluminum and copper.
Taking a single channel as an example: after flowing into the microchannel, the fluid is divided at the branch to destroy the normal flow of the fluid, the development of a fluid boundary layer is interrupted, the turbulent flow is enhanced, and the effect of enhancing heat transfer is achieved; the fluid continues to flow to reach the junction and join, and the development of a fluid boundary layer can be interrupted, so that the turbulent flow is enhanced, and the heat transfer is enhanced; the structure deficiency of the fractal structure micro-channel can be improved by the reciprocating circulation. Meanwhile, the branch structure conforms to a fractal theory, the local resistance loss in the fluid flowing process is increased slightly, the pumping work is increased slightly, and the system stability is increased.
Compared with the prior art, the invention has the following remarkable advantages: (1) compared with a parallel rectangular microchannel heat exchanger, the branch can damage the normal flow of fluid, interrupt the development of a thermal boundary layer of a cooling working medium and enhance turbulent flow; meanwhile, the effective heat exchange area is increased, so that the heat exchange is obviously enhanced. (2) Compared with a fractal structure microchannel heat exchanger, the split-flow and confluence heat exchanger can improve the defects of small heat exchange area and low heat exchange efficiency of the inlet section of the heat exchanger; the method has the advantages of large-area single-pass processing of the array, high efficiency, low cost and the like; the whole structure is flexible to adjust and is suitable for more occasions.
Drawings
FIG. 1: schematic diagram of split-confluence type rectangular micro-channel heat exchanger
FIG. 2: split-confluence type rectangular microchannel heat exchanger substrate axonometric drawing
FIG. 3: top view of substrate of split-confluence type rectangular micro-channel heat exchanger
In the figure: 1-cooling medium inlet, 2-upper cover plate, 3-microchannel base plate, 4-inlet and outlet flow channel cavity and 5-cooling medium outlet.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of the present invention and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The first embodiment is as follows: as shown in fig. 1, the split-confluence rectangular microchannel heat exchanger system of the present invention comprises an upper cover plate 2, a microchannel substrate 3, and an inlet and outlet flow channel chamber 3, wherein a plurality of microchannel structures are arrayed in the microchannel substrate 3 at intervals in parallel, the cross section of each microchannel along the height direction is rectangular, and a plurality of branches are periodically arranged in each microchannel.
The second embodiment is as follows: as shown in FIG. 1, one end of the microchannel heat sink is connected to the inlet of the cooling working medium, and the other end of the microchannel heat sink is connected to the outlet of the cooling working medium. After the cooling working medium flows in from the inlet section, the flow is distributed to each channel, and after heat exchange is carried out in the channels, the cooling working medium flows out from the outlet section.
The third concrete implementation mode: as shown in FIG. 3, the substrate of the microchannel has a rectangular cross section, wherein each parameter, w, of the branches1、w2Is the width of the branch, h is the distance between the branch and the junction, and theta is the inclination angle of the branch.
The fourth concrete implementation mode: taking a single channel as an example: after flowing into the microchannel, the fluid is divided at the branch to destroy the normal flow of the fluid, the development of a fluid boundary layer is interrupted, the turbulent flow is enhanced, and the effect of enhancing heat transfer is achieved; the fluid continues to flow to reach the junction and join, and the development of a fluid boundary layer can be interrupted, so that the turbulent flow is enhanced, and the heat transfer is enhanced; and the circulation is carried out until the fluid flows out.
The above description is only an alternative embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art can make insubstantial changes in the technical scope of the present invention within the technical scope of the present invention, and all actions infringe the scope of the present invention are included in the present invention.
Claims (7)
1. A split-confluence rectangular microchannel heat exchanger system comprising a microchannel substrate (3), characterized in that: the microchannel substrate (3) comprises a plurality of microchannels which are arranged in parallel at intervals in an array manner, the cross section of each microchannel along the height direction is rectangular, and any two adjacent microchannels of the microchannels are periodically arranged in a staggered manner to form a plurality of shunting-converging microchannels.
2. The split-flow, rectangular microchannel heat exchanger system of claim 1, wherein: the cross section of the shunting-converging micro-channel is rectangular, and the height of the shunting-converging micro-channel is the same as that of the main channel.
3. The split-flow, rectangular microchannel heat exchanger system of claim 1, wherein: the shunting-confluence micro-channel forms an included angle with the horizontal plane, and the horizontal included angle theta of the shunting-confluence micro-channel is 30-75 degrees.
4. The split-flow, rectangular microchannel heat exchanger system of claim 1, wherein: the micro-channels are periodically and alternately distributed, and the distance h between the center section of the shunting and the center section of the confluence is 2-5 mm.
5. The split-flow, rectangular microchannel heat exchanger system of claim 1, wherein: according to the shunting-converging micro-channel, the cross section of the main runner is reduced after shunting, the cross section of the main runner is increased after converging, and the Murray law is met.
6. The split-flow, rectangular microchannel heat exchanger system of claim 1, wherein: the flow dividing-converging micro-channel is provided with a round angle at the initial section of flow dividing and converging.
7. The split-flow, rectangular microchannel heat exchanger system of claim 1, wherein: the micro-channel material is one of aluminum and copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123087759.2U CN216482394U (en) | 2021-12-10 | 2021-12-10 | Split-confluence type rectangular micro-channel heat exchanger system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123087759.2U CN216482394U (en) | 2021-12-10 | 2021-12-10 | Split-confluence type rectangular micro-channel heat exchanger system |
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| Publication Number | Publication Date |
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| CN216482394U true CN216482394U (en) | 2022-05-10 |
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| CN202123087759.2U Expired - Fee Related CN216482394U (en) | 2021-12-10 | 2021-12-10 | Split-confluence type rectangular micro-channel heat exchanger system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753933A (en) * | 2022-06-15 | 2022-07-15 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Bionic active cooling flow passage structure for veins |
| CN114750965A (en) * | 2022-06-15 | 2022-07-15 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Cooling device based on bionic veins |
| CN115791244A (en) * | 2023-02-06 | 2023-03-14 | 中国核动力研究设计院 | Modular microchannel compact heat exchange experiment body, method, equipment and medium |
-
2021
- 2021-12-10 CN CN202123087759.2U patent/CN216482394U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753933A (en) * | 2022-06-15 | 2022-07-15 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Bionic active cooling flow passage structure for veins |
| CN114750965A (en) * | 2022-06-15 | 2022-07-15 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Cooling device based on bionic veins |
| CN114753933B (en) * | 2022-06-15 | 2022-09-02 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Vein bionic active cooling runner structure |
| CN115791244A (en) * | 2023-02-06 | 2023-03-14 | 中国核动力研究设计院 | Modular microchannel compact heat exchange experiment body, method, equipment and medium |
| CN115791244B (en) * | 2023-02-06 | 2023-04-28 | 中国核动力研究设计院 | Modular microchannel compact heat exchange experiment body, method, equipment and medium |
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Granted publication date: 20220510 |