Heat pipe structure capable of controlling sintering position of capillary tissue and preparation method thereof

Abstract

The invention discloses a heat pipe structure capable of controlling a sintering position of a capillary tissue and a preparation method thereof. The structure part mainly is that: an evaporation section sintering capillary tissue is arranged on an evaporation section of a pipe body, wherein the evaporation section sintering capillary tissue is at least formed by sintering and fixing metal powders on the inner wall of the evaporation section; the structure part further comprises a net body sintering composite capillary tissue which is in an embedding shape; the net body sintering composite capillary tissue is arranged in a cooling section of the pipe body and is formed by a metal net body and a powder sintering layer; the powder sintering layer is formed by pre-sintering metal powders and fixing on at least one side surface of a metal net body; and then the net body sintering composite capillary tissue is arranged in the interior space of the pipe body; and a powder position-limiting net body which is connected, spliced or engaged with the net body sintering composite capillary tissue is arranged in parallel with one end of the evaporation section sintering composite capillary tissue. By using the design, the heat pipe can achieve to the advantages of that: the sintering position of the capillary tissue is accurately controlled, a steam channel space is enlarged, the curved process of a coping pipe wall is more conducive, the manufacturing and forming are easier, the work liquid evaporation efficiency is increased and the like.

Description

technical field [0001] The invention relates to a heat pipe structure and its manufacturing method, in particular to a heat pipe that can control the sintering position of the capillary structure and expand the space of the steam channel, is more conducive to the bending process of the pipe wall, is easier to manufacture and shape, and improves the vaporization of the working fluid. Efficiency and many other practical and progressive innovative designs. Background technique [0002] In the design of the existing heat pipe structure, in order to achieve better heat transfer efficiency, a composite capillary structure will be introduced. However, although the existing composite capillary structure can indeed increase the heat transfer efficiency of the heat pipe, it still exists due to the difference in the shape of the heat pipe space. There are some problems to be improved and breakthroughs. [0003] In response to the current trend of light, thin and short design of comput...

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Problems solved by technology

[0002] In the design of the existing heat pipe structure, in order to achieve better heat transfer efficiency, a composite capillary structure will be introduced. However, although the existing composite capillary structure can indeed increase the heat transfer efficiency of the heat pipe, it still exists due to the difference in the shape of the heat pipe space. There are some problems to be improved and breakthroughs

[0003] In response to the current trend of light, thin and short design of computers and electronic equipment, the structure of the heat pipe must be flattened and miniaturized accordingly. Problem, Gein, in terms of the manufacturing process of the composite capillary structure in the existing heat pipe, the part of the powder sintered body usually needs to use a core rod to be inserted into the heat pipe space as a fixture, and then the core rod and the heat pipe tube The metal powder is filled into the gap of the wall and then sintered and shaped. However, this existing structure has been found in actual manufacturing experience. The metal powder cannot meet the state requirements of thinning, because if the gap is too small during the powder filling process, it will be difficult to achieve. , and as the length of the heat pipe becomes longer, there is also the problem that the powder is difficult to compact, and once the thickness of the powder sintered body is too thick, it will relatively cause the problem of insufficient space for the steam flow channel, and this problem occurs when the cross-sectional area of ​​the heat pipe is sufficient However, when the cross-sectional area of ​​the heat pipe is flattened and miniaturized to a certain extent, the problem of insufficient space for the steam channel will become prominent due to the relatively large proportion of the cross-sectional area occupied by the powder sintered body. , and it is difficult to improve and overcome

[0004] Another problem with the existing heat pipe composite capillary structure is that once the powder sintered body and mesh body are sintered and fixed in the heat pipe space, their flexibility will be almost lost, so when the heat pipe has to be pressed into a flat tube according to the demand Or in the shape of an elbow, the composite capillary corresponding to the bending part of the tube wall is often difficult to produce a consistent bending state, resulting in the phenomenon that the composite capillary and the heat pipe wall are separated from each other, and this phenomenon will simultaneously cause steam If the channel space is blocked or blocked, it will seriously affect the smooth flow of the working fluid in the vaporized state, which will greatly reduce the heat dissipation efficiency of the heat pipe

[0005] On the other hand, another problem existing in the structural design of the existing heat pipe is that it is difficult to control the position of the internal capillary structure during sintering, because in the existing heat pipe process, no matter whether the internal capillary structure is metal powder or When the mesh body is to be sintered in the heat pipe, its position is often difficult to control precisely and there are serious deviations and errors. As a result, the configuration can only be set for the entire section. If you want to limit it for a partial section However, there are technical bottlenecks and difficulties that need to be overcome. This is an important topic that the relevant industries need to think about and break through.

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