Heat pipe structure with effect of limiting powder sintering area and manufacturing method

Abstract

The invention discloses a heat pipe structure with an effect of limiting a powder sintering area and a manufacturing method. The heat pipe structure mainly comprises a pipe body divided into an evaporation segment, a condensing segment and a middle segment, an evaporation segment sintering unit, a net-shaped capillary organization and a reverse-folding type powder limiting edge, wherein the evaporation segment sintering unit performs sintering and positioning in the pipe body evaporation segment in a filling manner and is formed by sintering and fixing metal powder to the inner wall of the evaporation segment; the net-shaped capillary organization is arranged in the pipe body and is in a face-shaped net body shape formed by unit metal wires which are longitudinally and transversely woven and staggered; the first end of the net-shaped capillary organization is connected with the evaporation segment sintering unit; the second end of the net-shaped capillary organization extends in the direction of the condensing segment, and a work liquid backflow capillary space is formed between the net-shaped capillary organization and the inner wall of the pipe body; and the reverse-folding type powder limiting edge makes the first end of the net-shaped capillary organization have a local annular thickening area segment which serves as a stopping limiting interface used when the evaporation segment sintering unit performs sintering and positioning. Thus, the capillary organization sintering manufacturing process of the heat pipe achieves the beneficial effects that operation is easier and more convenient, implementation is easy, the yield is high and the sintering position can be accurately mastered, and achieves practical progress.

Description

technical field [0001] The invention relates to a heat pipe structure and manufacturing method, in particular to an innovative creation with the function of limiting the powder sintering area. Background technique [0002] In order to achieve better heat transfer efficiency, the existing heat pipe structure design usually introduces the structure of composite capillary structure. However, although the existing composite capillary structure can indeed increase the heat transfer efficiency of the heat pipe, there are still some gaps depending on the spatial shape of the heat pipe. Problems need to be improved. [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. Only in this way, the composite capillary structure originally arranged in the inner space of the heat pipe will be formed accordingly. Some problems, because, for the composite ca...

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Problems solved by technology

[0002] In order to achieve better heat transfer efficiency, the existing heat pipe structure design usually introduces the structure of composite capillary structure. However, although the existing composite capillary structure can indeed increase the heat transfer efficiency of the heat pipe, there are still some gaps depending on the spatial shape of the heat pipe. Problems need to be improved

[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. Only in this way, the composite capillary structure originally arranged in the inner space of the heat pipe will be formed accordingly. Some problems, because, for the composite capillary structure in the existing heat pipe, the part of its powder sintered body usually needs to adopt a mandrel to be inserted into the heat pipe space as a jig first, and then the mandrel 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 insufficient space for the steam flow channel, and the returning working fluid will be splashed by the impact of the steam flow and other problems, and these problems will not be highlighted under the condition that the cross-sectional area of ​​the heat pipe is sufficient. The problem of insufficient space in the steam flow channel is highlighted, and it is difficult to improve and overcome

[0004] Another problem existing in the design of the existing heat pipe structure is that it is difficult to control the position of the internal capillary structure during sintering, the processing process is difficult, and the defect rate is high. Because the existing heat pipe process, no matter whether the internal capillary structure is metal When the powder or mesh body is to be sintered in the heat pipe, the position is often difficult to control precisely because the capillary thickness is too thin and soft. There are problems such as difficulty in installation and assembly, and serious offset errors, resulting in configuration. Usually only It can be set up in the whole section. If you want to set up a limited type for a partial section, there are technical bottlenecks and difficulties that need to be broken through. This is an important issue that the relevant industries need to think about and break through.

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