A kind of ultra-thin heat pipe and its port sealing method

An ultra-thin heat pipe and heat pipe technology, which is applied in the field of heat pipes, can solve the problems of heat pipe use restrictions, occupying installation space, etc., and achieve the effect of reducing space and overcoming technical barriers

Active Publication Date: 2018-06-29
SUZHOU TIANMAI THERMAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the minimum length L1 of the sealing end of the heat pipe prepared by the current sealing process is about 5mm, which is an invalid length and needs to occupy an additional installation space of at least 5mm, so that the heat pipe can be used in ultra-thin mobile terminals with high PCB integration The use of is limited, and this technical problem has formed a technical barrier that the industry needs to solve urgently

Method used

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  • A kind of ultra-thin heat pipe and its port sealing method
  • A kind of ultra-thin heat pipe and its port sealing method
  • A kind of ultra-thin heat pipe and its port sealing method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] This embodiment discloses a method for sealing the end of an ultra-thin heat pipe, using this method to prepare such figure 2 In the heat pipe with the structure shown, one end of the heat pipe body 2 is a closed end 4, and the other end is a sealed end 6. In the present invention, the heat pipe body 2 is preferably a copper pipe, and the heat conductivity of the copper pipe is high. The sealing method of the example can prepare an ultra-thin heat pipe whose wall thickness is controlled below 0.6 mm, and is suitable for use in a highly integrated PCB circuit. The port sealing method includes the following steps,

[0028] (1) Sealing end pressing: Use a pressing tool to press the sealing end 6 of the heat pipe body 2, so that the inner wall surfaces of the sealing end 6 are bonded together. After pressing, the sealing end 6 forms two parts, which are gradually The shrinkage part 6a and the flattened part 6b, the length L2 of the sealing end 6 after pressing is less than...

Embodiment 2

[0034] Such as figure 2 As shown, the present embodiment provides a kind of ultra-thin heat pipe, comprises tubular body, and the wall thickness of tubular body is 0.6mm, preferably adopts the copper tube with high thermal conductivity, one end of described tubular body is closed end 4, and its other end is The sealing end 6 is sealed by the above sealing method. The length of the sealing end 6 after sealing is less than or equal to 2mm. The length direction of the pipe body is even, and after sealing, a closed cavity is formed inside the tubular body, and the closed cavity is filled with a phase change fluid medium.

[0035] The wall thickness of the heat pipe of the present invention is controlled below 0.6 mm, and the length of the sealing end 6 is controlled below 0.2 mm, which can be used in products with high PCB integration.

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Abstract

The invention provides an end opening sealing method of an ultrathin heat pipe. One end part of a heat pipe body is a closed end; a seal opening is formed in the other end part of the heat pipe body. The sealing method comprises the following steps of pressing the seal end: pressing the seal opening end of the heat pipe body by adopting a pressing fixture, so that the inner wall surface of the seal opening end of the heat pipe body is clung together; clamping the seal opening end: clamping the pressed seal opening end by adopting a clamping fixture; sintering in a furnace: arranging the whole heat pipe body in an atmosphere furnace together with the clamping fixture for sintering after the seal opening end is clamped by the clamping fixture, so that the seal opening end is diffused to weld and seam the sealed opening; cooling and taking out of the furnace: cooling the atmosphere furnace, and taking the heat pipe body out of the atmosphere furnace. By using the opening sealing method provided by the invention, the heat pipe of which the wall thickness is below 0.6 mm can be produced, and the length of the seal opening end can be finitely controlled to be below 2 mm, so that space needed by installing the heat pipe is greatly reduced, the technical barrier of the prior art is conquered, and application of the heat pipe to an ultrathin mobile terminal with high PCB (Printed Circuit Board) integration level becomes impossible.

Description

technical field [0001] The invention belongs to the technical field of heat pipes, and in particular relates to a port sealing method of an ultra-thin heat pipe. Background technique [0002] With the rapid development of electronic technology in recent years, the high frequency and high speed of electronic components and the density and miniaturization of integrated circuits have caused a sharp increase in the heat generated by electronic components per unit volume. In order to ensure the normal operation of electronic components, radiators are usually installed on their surfaces to The heat is dissipated quickly, and the heat pipe is the best heat sink due to its high thermal conductivity and reusability. [0003] The heat pipe is a tubular structure with an internal cavity, one end of which is closed and the other end forms a sealed end. After the internal cavity is evacuated and filled with a phase-change fluid medium, the sealed end is sealed, and the phase-change fluid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D15/02
CPCF28D15/0283
Inventor 丁幸强
Owner SUZHOU TIANMAI THERMAL TECH
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