Micro plate-type pulsating heat tube radiator capable of enhancing condensation

A technology of pulsating heat pipes and microplates, applied in indirect heat exchangers, cooling/ventilation/heating transformation, lighting and heating equipment, etc., can solve the problems of insufficient pulsation, small heat transfer area, and low sealing performance, and achieve pulsation Strong, increase heat transfer area, enhance the effect of sealing performance

Pending Publication Date: 2021-11-23
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent document can achieve a certain heat dissipation effect, the pulsation is not strong enough, the heat exchange area is small, and its sealing performance is also low

Method used

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  • Micro plate-type pulsating heat tube radiator capable of enhancing condensation
  • Micro plate-type pulsating heat tube radiator capable of enhancing condensation
  • Micro plate-type pulsating heat tube radiator capable of enhancing condensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 with figure 2 Shown: A micro-plate pulsating heat pipe radiator that can enhance heat transfer in the condensation section, which includes a silicon-based or copper-based plate, etched microchannels on the silicon-based or copper plate, and a glass or copper cover plate. The lower part of the micro-plate pulsating heat pipe is the evaporation section, the middle is the adiabatic section, and the upper part is the condensation section. The condensation section is divided into several bifurcated structures, which can increase the contact area between the fluid and the bottom plate and enhance heat transfer. There is a liquid filling port between the bifurcated structures. There are several bifurcated structures distributed in the condensation section, the micro channel is processed by MEMS etching, and the glass cover plate is sealed with the silicon base plate by anodic bonding. The cross-sectional shape of the micro channel can be square, rectangul...

Embodiment 2

[0032] Such as figure 1 , figure 2 with image 3 As shown, a micro-plate pulsating heat pipe that enhances condensation in the example of the present invention is mainly formed by bonding a silicon-based or copper substrate plate etched with micro-channels and glass or copper, including a condensation section 1, an adiabatic section 2, and an evaporation section 3 , bifurcation structure 4 and filling port 5. Vacuumizing and working medium injection are realized through the filling port 5 . In this example, the plate type pulsating heat pipe is filled with 50% volume fraction of pure water.

[0033] figure 1 The overall size of the micro-plate pulsating heat pipe is 49mm×100mm, the micro-channel aspect ratio is 1:1, both are 2mm, the interval between adjacent channels is 1mm, and there are 14 channels in the longitudinal direction. There are two bifurcated structures in the condensation section, such as image 3 with Figure 4 As shown, the area is 10mm×10mm, there a...

Embodiment 3

[0036] Such as figure 1 , figure 2 , image 3 As shown, the same as in Example 1, the difference is that the depth of the microchannel in the evaporation section and the heat insulation section is 3mm, the width is 2mm, and the aspect ratio is 1.5:1, and the depth of the bifurcated microchannel is 3mm, and the width is 1.2mm. The aspect ratio is 2.5:1.

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Abstract

The invention discloses a micro plate-type pulsating heat tube radiator capable of enhancing condensation, which belongs to the technical field of heat dissipation and cooling of passive driving, comprises a silicon-based or copper-based bottom plate, and is characterized in that a micro-channel etched on the silicon-based or copper-based bottom plate and a glass or copper cover plate are arranged, the lower part of a plate-type pulsating heat tube is an evaporation section, and the middle part of the plate-type pulsating heat tube is a heat insulation section; the upper part is a condensation section, the condensation section is divided into a plurality of branch structures, and liquid filling openings are formed between the branch structures. While inheriting the advantages of a traditional pulsating heat tube, the micro channel is etched on the silicon-based or copper-based bottom plate, the plane is more beneficial to attachment of the micro-channel and an electronic chip and reduction of contact thermal resistance, and the micro-channel is smaller in size, strong in pulsation and more beneficial to transfer of heat from the evaporation section to the condensation section, so that the micro channel is more suitable for the field of heat dissipation of electronic devices.

Description

technical field [0001] The invention belongs to the technical field of heat dissipation and cooling without edge drive, and in particular relates to a miniature plate-type pulsating heat pipe radiator that enhances condensation. Background technique [0002] Heat pipe radiator is a new product produced by using heat pipe technology to make significant improvements to many old radiators or heat exchange products and systems. There are two types of heat pipe radiators: natural cooling and forced air cooling. The thermal resistance of the air-cooled heat pipe radiator can be made smaller, and it is often used in high-power power supplies. Heat pipe radiators consist of sealed tubes, wicks and steam channels. The liquid-absorbent wick surrounds the tube wall of the sealed tube and is soaked with volatile saturated liquid. This liquid can be distilled water, ammonia, methanol or acetone, etc. Heat pipe radiators filled with liquids such as ammonia, methanol, and acetone still...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D15/02H05K7/20
CPCF28D15/0266H05K7/20336
Inventor 张东徐宝睿安周建侯宏艺张瑞吴江波南军虎权辉刘春阳闫承涛李金平王林军
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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