Composite liquid absorption core of heat dissipation heat pipe and manufacture method thereof

A liquid absorbing core and heat pipe technology, applied in the field of heat transfer heat pipes, can solve the problems of high capillary pressure, low thermal resistance, small return resistance, etc., and achieve the effects of large capillary pressure, small thermal resistance, and small heat dissipation space

Active Publication Date: 2012-02-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the existing heat pipe liquid-absorbent core, and propose a heat pipe composite liquid-absorbent core with high

Method used

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  • Composite liquid absorption core of heat dissipation heat pipe and manufacture method thereof
  • Composite liquid absorption core of heat dissipation heat pipe and manufacture method thereof
  • Composite liquid absorption core of heat dissipation heat pipe and manufacture method thereof

Examples

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Example Embodiment

[0037] Example 1:

[0038] A manufacturing method of a heat pipe composite wick for heat dissipation includes the following steps and process conditions:

[0039] (1) Take the red copper powder particles with a particle size of 100-140 mesh. The red copper powder particles are spherical copper powder and irregular copper powder, and most of them are irregular copper powder particles. Take the copper fiber with a diameter of 150μm and a length of 2mm. The mass ratio of the copper powder particles to the copper fiber is 10:1; the core rod is placed in the copper tube to form an annular liquid wick filling space, and the copper powder particles and copper are filled in Mixture of fibers; for the filling of copper powder particles mixed with copper fibers, the concentricity of the core rod and the copper tube must be ensured. If the core rod is not in the center of the copper tube, the wick after sintering will be eccentric, thereby affecting The heat transfer performance of the micro...

Example Embodiment

[0047] Example 2

[0048] A method for manufacturing a heat pipe composite wick for heat dissipation includes the following steps and process conditions:

[0049] (1) Take spherical copper powder with a particle size of 140 mesh-200 mesh, a copper fiber diameter of 150 μm, a length of 5 mm, and a mass ratio of copper powder to copper fiber of 6:1; a thin copper plate rectangle of 55mm×55mm×4mm Fill the cavity with a mixture of 5g of copper powder particles and copper fibers; for the filling of copper powder particles mixed with copper fibers, the uniformity of the copper fibers in the copper powder particles must be ensured to make the wick structure uniform, and the micro heat pipe Stable performance.

[0050] (2) Use a mold to flatten the mixture of copper powder and copper fiber in the rectangular cavity, place the powder-filled thin copper flat rectangular cavity on the bracket and fix it, place it in a vacuum-protected sintering furnace for sintering, and set the temperature ...

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Abstract

The invention discloses a composite liquid absorption core of a heat dissipation heat pipe and a manufacture method thereof; the composite liquid absorption core comprises red copper powder particles and red copper fibres; double-pore structures are formed among the copper powder particles, among the red copper fibres and among the red copper powder particles and the red copper fibres, wherein fine pores are formed among the red copper powder particles; large pores are formed among the red copper powder particles and the red copper fibres; and the red copper fibres are not connected. The manufacture method comprises the following steps of: forming a spatial range of the liquid absorption core at first, and uniformly filling the mixture of the red copper powder particles and the red copperfibres; placing the mixture in a vacuum protective sintering furnace to sinter at 900-1000 DEG C for 30-120 min; and cooling the furnace to room temperature, disassembling other auxiliary structural devices, and then obtaining the composite liquid absorption core. According to the composite liquid absorption core of the heat dissipation heat pipe and the manufacture method thereof disclosed by the invention, the manufacture method is simple; the production cost is low; the disadvantages of the current liquid absorption core of the heat pipe are overcome; and the composite liquid absorption core of the heat dissipation heat pipe, which is high in capillary pressure, low in backflow resistance and low in thermal resistance, is provided.

Description

technical field [0001] The invention relates to a heat pipe for heat transfer, in particular to a composite liquid-absorbing core structure of a heat pipe for heat dissipation and a manufacturing method thereof. Background technique [0002] Heat pipes have become ideal components for heat dissipation of chips with high heat flux. However, with the development of further miniaturization and integration of electronic chips, the heat dissipation of electronic products has higher requirements on the heat transfer performance of heat pipes. Therefore, the performance of heat pipes should be improved. Still key. The heat transfer performance of the heat pipe is mainly determined by the structure of the capillary wick. At present, the commonly used wick structures include: wire mesh type, groove type and sintered type. The sintered liquid-absorbing core has a large capillary suction force and large heat transfer, but there is a contradiction that the liquid return resistance incr...

Claims

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Application Information

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IPC IPC(8): F28D15/04B22F7/08
Inventor 李勇陈镇宇揭志伟欧元贤曾志新
Owner SOUTH CHINA UNIV OF TECH
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