A new type of printed circuit board heat exchanger core with three-dimensional spiral wound flow channel

Abstract

The invention provides a printed circuit board heat exchanger core with a three-dimensional spiral wound flow channel, comprising: a multi-layered metal plate with an etched flow channel on the surface, which is superimposed and welded into one body by vacuum diffusion welding. The heat exchanger core body includes: metal plates with several discontinuous flow channels on both sides, several perforated metal plates, and upper and lower cover plates with several discontinuous flow channels on one side; the heat exchanger core body passes through The upper and lower cover plates are the upper and lower cover plates, the middle is the perforated metal plate, and the metal plates of the discontinuous flow channel are periodically stacked; the upper and lower cover plates are directly connected to the Perforated metal plates are attached. The device of the invention increases the heat exchange area and improves the heat exchange. And effectively enhance the disturbance, eliminating the effect of axial heat conduction.

Description

technical field [0001] The invention relates to the technical field of heat exchange devices, in particular, to a new type of printed circuit board heat exchanger core with a three-dimensional spiral wound flow channel. Background technique [0002] Printed Circuit Heat Exchanger (PCHE) is a compact micro-channel heat exchanger. Compared with traditional plate and shell and tube heat exchangers, it adopts photochemical etching and vacuum diffusion welding technology. It has the advantages of high compactness, high pressure resistance, low temperature and high temperature resistance, high heat exchange efficiency and high reliability. In recent years, it has been widely studied in the fields of nuclear energy, solar energy, and natural gas. [0003] The printed circuit board heat exchanger core is made by welding several plates processed by photochemical etching through vacuum diffusion welding technology. The flow channel forms are mainly linear, Z-shaped, S-shaped and dis...

AI Technical Summary

Problems solved by technology

[0004] Different forms of flow channels enhance the heat transfer effect by enhancing the disturbance of the fluid in the heat exchanger. Although the heat transfer effect is enhanced, it also increases the flow resistance and increases the pumping cost.

The traditional runner form can be regarded as a two-dimensional flat flow, and its ability to enhance comprehensive performance is relatively limited.

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