A kind of evaporator of loop heat pipe and its preparation method

Abstract

The invention relates to an evaporator of a loop heat pipe and a preparation method of the evaporator. The evaporator comprises an outer cylindrical wall, a heat absorption face, an upper end cover, a capillary core and a vapor-liquid isolation barrel with openings in the two ends. A cavity structure is formed by the outer barrel wall, the heat absorption face and the upper end cover, the capillary core is attached to the heat absorption face, one end of the vapor-liquid isolation barrel is in contact with the surface of the capillary core, the capillary core is pressed on the heat absorption face, and the other end of the vapor-liquid isolation barrel is fixedly connected with the upper end cover; the cavity structure formed by the outer barrel wall, the heat absorption face and the upper end over is divided into two parts through the vapor-liquid isolation barrel, a vapor cavity is formed in the vapor-liquid isolation barrel, and a liquid cavity is formed outside the vapor-liquid isolation barrel. The evaporator is ingenious in structural design and excellent in performance, it is effectively guaranteed that vapor and liquid in the evaporator are separated, certain positive pressure and negative pressure can be borne, that is, a coupling face is not likely to deform, the machining method is simple and reliable, and volume production is convenient.

Description

technical field [0001] The invention relates to an evaporator of a loop heat pipe and a preparation method thereof, and belongs to the technical field of loop heat pipes in engineering thermophysics and heat pipe disciplines. Background technique [0002] The heat pipe is a high-performance heat transfer element, which is a device that continuously transfers heat from the heat source to the heat sink by the evaporation, condensation and reflow of the internal working medium (working fluid). Heat pipes are used in a wide range of applications. With the development of technology, the demand for heat pipes continues to grow. [0003] A loop heat pipe (Loop Heat Pipe, LHP) is generally composed of an evaporator, a compensation chamber, an isolator, a condenser, a steam pipe and a liquid pipe. Steamer design and fabrication methods are key to achieving the desired performance of the LHP. [0004] There are various structures of heat pipes, and LHP is a kind of heat pipe. At pr...

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Problems solved by technology

Existing flat-plate LHP evaporators mostly use a channel structure, that is, a reverse evaporator (the direction of heat flux is opposite to the direction of steam flowing out of the capillary core). Due to the distribution of liquid before starting, it can be said that many working conditions cannot be started, and the reliability is not high

[0006] In addition, in the processing technology of the capillary core of the existing LHP evaporator, whether it is a sintered core structure, a channel structure, or a channel plus wire mesh structure, welding is often required, and the structure is not very convenient to realize, and the reliability of vapor-liquid separation is difficult. Guaranteed

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