Evaporator based on high-permeability high-capillary-force multi-scale capillary core

Abstract

The invention discloses an evaporator based on a high-permeability high-capillary-force multi-scale capillary core. The evaporator comprises a liquid storage device, a liquid guide pipe, a sealing rear end cover, an evaporator body, a secondary core, a main core, a front end cover and a gas pipeline. All parts in the evaporator are coaxial, the cylindrical liquid storage device is connected with the evaporator, the liquid guide pipe is located on the axis, and the sealing rear end cover, the secondary core and the front end cover are sequentially welded to the liquid guide pipe. A main core and a secondary core in the evaporator are in interference fit, and a liquid storage device and the evaporator are separated by an end cover after sealing, so that the liquid storage device is used for a cylindrical loop heat pipe. The invention has the beneficial effects that the main core and the secondary core have large difference in aperture scale, and meanwhile, large hair suction force, high permeability, low flow resistance, low heat leakage and large heat transfer limit are realized. The secondary core is formed by stacking silk screens, and interference fit between the secondary core and the main core is easy to realize when a single silk screen is assembled. And the main core and the secondary core are in interference fit, so that the integrity of the evaporator is ensured, the contact is good, and the heat leakage is reduced.

Description

technical field [0001] The invention belongs to the field of thermal control, and relates to a loop heat pipe, in particular to an evaporator component on the loop heat pipe. Background technique [0002] With the development of integrated technology and thermal packaging technology, the performance and heat flux density of electronic devices are improved at the same time, and the problem of heat dissipation has become a key technical bottleneck. It is urgent to develop an efficient heat transfer element. As a two-phase heat transfer element, the loop heat pipe is one of the important means to solve the heat dissipation problem of electronic devices with high heat flux density. LHP uses the phase change of the working medium for heat transfer. The capillary force generated by the capillary core inside the evaporator provides the main driving force for the working medium to circulate in the loop. The evaporator and the condenser are connected by a smooth pipeline, which has h...

AI Technical Summary

Problems solved by technology

In order to solve the problems of poor permeability and high thermal conductivity of the metal powder sintered core in the existing evaporator, the capillary suction force produced by the capillary core made of wire mesh or metal foam is small, and the heat transfer limit is small, a new type of evaporator is provided. The evaporator device of the scale capillary wick not only has a small pore size, provides a large capillary force, has a high permeability, reduces flow resistance, is also easy to assemble, and reduces heat leakage

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