Aluminum plate-fin type heat exchanger and vacuum braze welding process method thereof

Abstract

The invention discloses an aluminum plate-fin type heat exchanger and a vacuum braze welding process method thereof, which comprises a structure of the aluminum plate-fin type heat exchanger and the vacuum braze welding process method. The invention uses a dislocated rectangular fin to substitute for a triangular fin structure in a high-temperature fluid medium passage. The invention adopts technical scheme as follows: controlling technological parameters of ambient air humidity, clamping pressure, brazing filler thickness, heating-up temperature, vacuum degree, time and the like, thus overcoming problems and shortcomings of large body, non-compactness and bad defects of bending lodging fin, intermittent brazing seam, faulty solder, corrosion and leakage existing in vacuum braze welding in the prior art. Due to the aluminum plate-fin type heat exchanger and the vacuum braze welding process method thereof, by improving product structure and manufacturing process, the aluminum plate-fin type heat exchanger features in compact structure and small body, and the purpose of reducing bad defects, improving welding quality and heat exchange efficiency are achieved.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to an aluminum plate-fin heat exchanger and a vacuum heat exchanger used in various media heat exchange in automobiles, chemical industry, engineering machinery, petrochemical, refrigeration, air-conditioning and other equipment. Brazing process method. Background technique [0002] The aluminum plate-fin heat exchanger is composed of a stack of isolated and orthogonal high-temperature fluid medium channels and low-temperature fluid medium channels; heat conduction fins are welded in the channels. Due to the different fin structures used, the heat exchanger The heat transfer efficiency and volume are also different. In the prior art, triangular fins are usually used in the high and low temperature fluid medium channels. The heat transfer area of ​​the triangular fins is small. Under the premise of satisfying the heat transfer efficiency, the heat exchanger The shape of the aluminum plate-fin hea...

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Problems solved by technology

[0003] Aiming at the problems and deficiencies in the above-mentioned prior art, the present invention replaces the triangular-shaped fin structure with misplaced rectangular fins in the high-temperature fluid medium channel, and adopts the control of ambient air humidity, clamping pressure, solder thickness, heating temperature, and vacuum degree.

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