A metal liquid-absorbent core with multi-aperture structure characteristics and its manufacturing method

Abstract

The invention discloses a metal liquid absorption core with a multi-aperture structure characteristic and a manufacturing method thereof, and relates to the field of heat pipe liquid absorption cores.The metal liquid absorption core comprises a three-dimensional framework structure, and the three-dimensional framework structure is formed by sintering metal powder, macroporous structures are arranged on the three-dimensional framework structure, liquid flow channels are formed by communicating the macroporous structures, and micro-pore structures are formed in gaps among metal powder particles. The problems of low efficiency, surface pore blockage, serious powder falling and the like of the traditional processing mode can be solved, and the communicated macroporous structure is used as a main liquid flow channel, so that the whole metal liquid absorbing core has higher capillary force under small pore diameter, and meanwhile, the whole metal liquid absorbing core still has lower liquidflow resistance.

Description

technical field [0001] The invention relates to the field of heat pipe liquid-absorbing cores, in particular to a metal liquid-absorbing core with a multi-aperture structure feature and a manufacturing method thereof. Background technique [0002] At present, the main heat dissipation and cooling devices mainly include ordinary heat pipes and loop heat pipes. The evaporator is one of the important components inside the loop heat pipe, and the liquid-absorbing wick is the key to the heat transfer performance of the evaporator. The main function of the liquid-absorbing core is to promote the movement of the working medium through capillary force, absorb heat and evaporate, provide the entire cycle power of the loop heat pipe, and ensure the directional flow of the working medium. The performance of the liquid-absorbing core of the evaporator directly affects the loop. Heat transfer performance and start-up performance of heat pipes. High-performance liquid-absorbing core has...

AI Technical Summary

Problems solved by technology

However, most of the ways to prepare liquid-absorbent cores are made of a single material. The capillary channels of sintered or extruded liquid-absorbent cores are very unstable, and pores are prone to clogging during work, and the heat of the evaporation chamber of the evaporator evaporates along the The shell of the device leaks into the liquid compensation chamber, and even the gas directly enters the liquid compensation chamber through the ordinary liquid suction core, which greatly reduces the heat transfer performance of the entire loop heat pipe

The existing composite metal liquid-absorbent core structure has not fundamentally solved the problem of controlling the liquid-absorbent core structure, and the research on the vapor-liquid two-phase interface only stays on a single-material liquid-absorbent core

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