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Fiber capillary tube foamy copper composite wick flat micro heat pipe and preparation method thereof

A technology of composite liquid absorbent core and flat plate micro heat pipe, applied in the field of micro heat pipe, can solve the problems of poor permeability, high thermal resistance, small capillary force, etc.

Active Publication Date: 2021-05-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a fiber capillary foam copper composite liquid-absorbing core flat micro-heat pipe and a preparation method thereof, which are used to solve the problem of low capillary force, poor permeability and high thermal resistance of the current composite liquid-absorbing core flat micro-heat pipe technical issues

Method used

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  • Fiber capillary tube foamy copper composite wick flat micro heat pipe and preparation method thereof
  • Fiber capillary tube foamy copper composite wick flat micro heat pipe and preparation method thereof
  • Fiber capillary tube foamy copper composite wick flat micro heat pipe and preparation method thereof

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Embodiment 1

[0039] Such as Figure 1-Figure 8 As shown, this embodiment provides a fiber capillary foam copper composite liquid-absorbing core flat micro heat pipe, including an upper cover plate 1 with a curved beam 2, a lower shell 6, a fiber capillary 8 and a foam copper 7 to form a composite liquid-absorbing core 4 , adhesive tape 3, the lower part of the composite liquid-absorbent core 4 is neatly arranged by fiber capillaries 8, and the upper part is covered with foamed copper 7; The liquid core 4 is bonded to the inner wall of the lower shell 6 with a graphene coating 9, and is compressed with the upper cover plate 1 to form a sealed structure.

[0040] In this embodiment, CNC numerical control machine tools are used to mill out four arc-shaped beams on the copper plate (top cover plate 1). One circle; two semi-ellipses are set in the middle, and quarter circles are set on both sides to reduce the gas flow resistance, increase the width of the air flow channel, and increase the ai...

Embodiment 2

[0048] Step 1. First, use CNC machine tools to accurately process the upper cover plate 1 and the lower shell 6 with the curved beam 2, and then cut out the equal-length fiber capillary 8 and a layer of foamed copper 7 according to the size of the lower shell 6, and process them with a needle The end of the fiber capillary 8 is dredged to obtain an upper cover plate 1 , a lower shell 6 and a composite liquid-absorbing core 4 .

[0049] Step 2. Put the upper cover plate 1, lower shell 6, and composite liquid-absorbing core 4 into the ultrasonic cleaner, ultrasonically clean them with methanol and ethanol for 10-20 minutes in turn, and then rinse them with deionized water to complete the upper cover plate 1 and lower shell. Cleaning of the shell 6 and the composite liquid-absorbing core 4.

[0050] Step 3. Put the cleaned upper cover 1 into an oven at 55-65°C to dry, take it out, and evenly apply a layer of hydrophobic material (organic silicon polymer or Teflon) inside to compl...

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Abstract

The invention discloses a fiber capillary tube foamy copper composite wick flat micro heat pipe and a preparation method thereof. The micro heat pipe is composed of an upper cover plate, a lower shell and a composite wick, four arc-shaped cross beams are machined on the upper cover plate, the lower portion of the composite wick is formed by arranging fiber capillary tubes in order, and the upper portion of the composite wick is covered with foamy copper. The preparation method of the micro heat pipe mainly comprises the steps of hydrophobic treatment of the inner wall of the upper cover plate, hydrophilic treatment of the composite wick, cementing packaging and the like. The four arc-shaped cross beams machined on the upper cover plate can press the composite wick in the lower shell on one hand, and can reduce resistance of gas flow on the other hand. The surface hydrophilic capacity of the composite wick is improved through a chemical corrosion method, and the liquid backflow characteristic is improved. The flat plate micro heat pipe prepared by the method has the advantages of simple process, low cost, high liquid backflow speed, small gas flow resistance, good heat transfer performance, suitability for heat dissipation of various micro integrated circuits and the like.

Description

technical field [0001] The invention relates to the field of micro heat pipes, in particular to a fiber capillary foam copper composite liquid-absorbing core flat micro heat pipe and a preparation method thereof. Background technique [0002] With the rapid development of microelectronics technology, the integration of electronic chips is getting higher and higher, and the heat flux per unit volume is also rising sharply. If the heat dissipation is not timely, it will seriously affect the working efficiency and life of the chip. The heat dissipation efficiency is greatly improved in a small space, and traditional refrigeration components are far from meeting this requirement. Therefore, heat dissipation has become an important factor restricting the development of electronic chips. In order to meet the needs of technological development, micro heat pipe technology has developed rapidly. Micro heat pipes have the characteristics of small size, good thermal conductivity, fa...

Claims

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Application Information

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IPC IPC(8): F28D15/04
CPCF28D15/04F28D15/046
Inventor 赵振刚张延辉李英娜张家洪张大骋
Owner KUNMING UNIV OF SCI & TECH