High-efficiency gravity heat pipe and manufacturing method thereof

Abstract

The invention relates to a high-efficiency gravity heat pipe and a manufacturing method thereof. The high-efficiency gravity heat pipe comprises an evaporating section, a heat insulating section and a condensing section, and is characterized in that a metal powder porous layer is sintered on the inner surface of the heat tube evaporating section, and the condensing section is chemically coated. The heat tube manufactured by the process method in the invention can simultaneously reinforce boiling heat transfer and condensing heat transfer, so that a plurality of ideal vaporization cores are artificially increased, thus the boiling phenomenon of the liquid is continuously carried out to achieve a purpose of reinforcing the boiling heat transfer; on the other hand, the surface of a chemical coating of the heat tube condensing section is modified to acquire a low surface free energy value; simultaneously, the coating layer is a metal-based coating layer with good thermal conductivity, thus the condensing heat transfer can be reinforced; from the above, the high-efficiency gravity heat tube reinforce the boiling and condensing effects very remarkably, has the characteristics of good heat transfer reinforcing effect, high production efficiency, low cost and the like.

Description

【Technical field】 [0001] The invention relates to the technical field of gravity tubes, in particular to a high-efficiency gravity heat tube and a preparation method thereof. 【Background technique】 [0002] The heat pipe is a new type of high-efficiency heat transfer element. It adopts the heat transfer principle of phase change on both sides. It can transmit a large amount of heat over a long distance through its small cross-sectional area without external power. Because of its many excellent properties, such as high thermal conductivity, excellent isothermal properties, and constant temperature characteristics, heat pipes are widely used in chemical and petrochemical industries, metallurgical industries, and electrical and electronic engineering. In the case where the heat transfer temperature difference is not large, the internal thermal resistance of the heat pipe will become a key factor restricting the heat transfer capability of the heat pipe, so the internal heat tra...

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Problems solved by technology

[0005] In terms of strengthening phase change heat transfer, most of the applications that can be achieved are only one-sided strengthening, and the strengthening effect on one side is very obvious, but because the overall heat transfer effect is affected by both sides, the increase of the coefficient on one side often makes the other side stronger. The heat transfer resistance on the side becomes the main factor affecting the overall heat transfer effect, so it is imminent to develop a heat pipe with enhanced boiling and enhanced condensation

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