Heat pipe

Abstract

A heat pipe includes shell, capillary structure arranged in inner wall of the shell and appropriate working liquid sealed in the shell. The heat pipe includes a condensation section, an evaporation section, wherein the aperture of the pore of the capillary structure arranged in the inner wall of the evaporation section is smaller than the aperture of the capillary structure arranged in the inner wall of the condensation section, thus, reflux resistance of the liquid is reduced to guarantee that the evaporation section has enough working liquid, and also a lot of steam nucleating points can be provided for the evaporation section to accelerate boiling efficiency for the working liquid, thereby improving heat conduction efficiency for the heat pipe.

Description

【Technical field】 [0001] The invention relates to a heat transfer device, in particular to a heat pipe. 【Background technique】 [0002] The heat pipe has the characteristics of ultra-quiet, fast heat transfer, high thermal conductivity, light weight, small size, no moving parts, simple structure and multi-purpose, and the heat pipe can quickly transfer a large amount of heat energy under the condition that the temperature remains almost constant. widely used as superconductors. [0003] The basic structure of the heat pipe is that the inner wall of the closed tube is lined with a capillary structure layer that is easy to absorb the working fluid, while the central space is in a hollow state, and an amount equivalent to the total pore volume of the capillary structure layer is injected into the vacuumed closed tube. dynamic fluid. The heat pipe can be divided into an evaporation section, a condensation section, and an adiabatic section in between according to the relative p...

AI Technical Summary

Problems solved by technology

[0006] The inside of the heat pipe adopts a single form of capillary structure from the evaporation section 40 to the condensation section 60, such as a single groove structure, a single sintered powder structure or a single screen structure, so that each part of the heat pipe can withstand The maximum heat flux density is almost the same. The single capillary structure of this structure cannot take into account the small fluid return resistance and the large capillary force at the same time, and it cannot provide an effective heat conduction path between the external heat source and the working liquid in the tube at the same time.

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