A micro-channel heat exchanger with multi-stage micro-channels and its manufacturing method

Abstract

The invention discloses a microchannel heat exchanger with multistage microchannels and a manufacturing method thereof. The microchannel heat exchanger is composed of an upper cover plate, a lower cover plate and a metal microchannel base body. The metal microchannel matrix includes a number of microchannels arranged in parallel and spaced arrays, and the two side walls of the microchannels respectively have a raised secondary microchannel structure in an array, and the secondary microchannels are symmetrically distributed in the microchannels, It can significantly increase the heat exchange area, enhance the turbulence, and realize enhanced heat exchange. The preparation method is as follows: firstly process trapezoidal grooves with an array on the work roll to form a V-shaped boss; change the axial translation amount and pressing depth of the work roll with grooves, and perform multi-pass rolling processing to obtain a multi-pass rolling process. A metal microchannel substrate with level microgrooves; finally, it is sealed and packaged to obtain a new type of microchannel heat exchanger. The invention solves the difficult problem of processing and forming the multi-level micro channel structure in the array micro channel, and has the advantages of simple process, low cost, high efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of microstructure design and manufacture, and relates to a microchannel heat exchanger and a manufacturing method thereof, in particular to a microchannel heat exchanger with multistage microchannels and a manufacturing method thereof. Background technique [0002] In recent years, with the rapid development of electronic information, integrated communication and other industries, electronic components tend to be miniaturized and integrated. Micro components make electronic equipment more portable, efficient and popular, but it also causes problems such as excessive heat generation per unit area, which seriously restricts the further development of micro electronic devices. Due to its light weight, small size, and good heat dissipation performance, microchannel heat exchangers are considered to be an effective way to solve the high heat flux density of micro components. Ordinary microchannel heat exchangers...

AI Technical Summary

Problems solved by technology

However, when forming micro-channel arrays, the roll-to-plate method requires a large-area micro-channel mold. Due to the limitation of the mold manufacturing process, the efficiency of roll forming is low.

The traditional roll-to-roll method can efficiently form the array microchannel structure, but it still faces the following difficulties when it is used to form the microchannel structure with micro-protrusions on the inner wall: ①It is difficult to realize the single-pass processing of the array microchannel; ②Working The grooves on the roller are complex, difficult to process, and insufficient in strength; ③ Difficult to process multi-level micro-grooves with micro-protrusion enhanced heat transfer structures on the inner wall

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