A microchannel plate-fin heat exchanger and its forming and assembling method

Abstract

The invention discloses a microchannel plate-fin heat exchanger and forming and assembling methods. The plate-fin heat exchanger mainly comprises upper rib plates, lower rib plates, seal strips and fins, wherein microchannels are formed by assembling and combining gaps among the processed and formed upper rib plates, lower rib plates, seal strips and fins. The hydraulic equivalent diameter of thechannels of the plate-fin heat exchanger reaches 0.01-1 mm, which conforms to the definition of the microchannels; the microchannel plate-fin heat exchanger is new. The purpose of industrialized large-scale production of the microchannel plate-fin heat exchangers is achieved by adopting the traditional processing technology, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to a micro-channel heat exchanger, in particular to a micro-channel structure of a micro-channel plate-fin heat exchanger and a forming and assembling method thereof. Background technique [0002] Microchannel heat exchanger is a new type of heat exchanger developed in the 1990s. It has the characteristics of compact structure and high heat dissipation efficiency. It is an important direction for the development of heat exchangers to high compactness and miniaturization. It is different from A typical sign of an ordinary compact heat exchanger is that the hydraulic equivalent diameter of the fluid flow channel is between 0.01 mm and 1 mm, which is smaller than the hydraulic equivalent diameter of an ordinary compact heat exchanger of 1 mm to 6 mm. [0003] A typical structure of a microchannel heat exchanger is as figure 1 As shown, it is composed of heat sink 1 and cover plate 2 processed with micro-flow channels, and a micro-ch...

AI Technical Summary

Problems solved by technology

[0003] A typical structure of a microchannel heat exchanger is as figure 1 As shown, it is composed of heat sink 1 and cover plate 2 processed with micro-flow channels, and a micro-channel heat exchanger is formed by multi-layer superposition welding. The hydraulic equivalent diameter of the fluid flow channels is between 0.01 mm and 1 mm. The size of the channel is very small, and the width of the general groove is less than 0.3mm. Traditional mechanical processing methods cannot process it at all. Currently, the commonly used processing methods include high-tech advanced processing such as laser processing, concentrated ion beam, wet chemical etching, and ultraviolet lithography. Technology, the processing method has high cost and low efficiency, and is not convenient for large-scale production

[0004] The typical structure of an ordinary compact plate-fin heat exchanger is as follows: figure 2 As shown, a heat dissipation unit is composed of partitions 3, seals 4 and fins 5, and a plate-fin heat exchanger is formed by multi-layer superposition welding. The partitions are cut from plates, the seals are machined from plates, and the fins It is stamped from a strip, and finally brazed into a plate-fin heat exchanger through multi-layer stacking and combination. Due to the limitation of the stamping process, the minimum wave pitch of the processed fins can only reach 1.2mm at present. The minimum equivalent diameter is 1.25mm, which cannot reach the level of microchannels, forming an insurmountable boundary between ordinary compact plate-fin heat exchangers and microchannel heat exchangers

Images