Brazing method of high pressure aluminum plate-fin heat exchanger

Abstract

The invention discloses a high-pressure aluminum plate-fin type heat exchanger brazing method which comprises the following steps that (1) a plurality of holes are drilled in a sealing tape of a heat exchanger; (2) temperature thermocouples are arranged in the holes of the sealing tape; (3) the sealing tape in which the temperature thermocouples are arranged is assembled and positioned with a partition; (4) the contact surface formed between the sealing tape and the partition which are assembled and positioned is heated; (5) brazing filler metal is added to the contact surface which is heated; and (6) after the brazing filler metal is molten and the contact surface is brazed for insulation, sundries on the contact surface are processed, and leakage inspection after brazing is performed. After such a method is adopted, the high-pressure aluminum plate-fin type heat exchanger brazing method which has the advantages of accurate control over brazing temperature, short brazing time and high brazing strength can be obtained.

Description

technical field [0001] The invention relates to the field of brazing, in particular to a brazing method for making high-pressure aluminum plate-fin heat exchangers. Background technique [0002] With the continuous development of industry, aluminum plate-fin heat exchangers are more and more widely used due to their advantages of compact structure, light weight, small volume and high heat transfer efficiency. This makes the aluminum plate-fin heat exchanger have higher requirements and standards in terms of production requirements, product quality and production costs. [0003] A manufacturing method of an aluminum plate-fin heat exchanger is disclosed in the patent publication number CN1943973A, which includes the steps of cutting, cleaning, assembling, brazing and pressure testing. When embedding thermocouples, thermocouples should be installed strictly according to the level, position and quantity specified in the process. This patent gives the temperature measurement m...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to improve the design of the existing brazing technology in order to overcome the shortcomings of the existing aluminum plate-fin heat exchangers such as insufficient brazing, insufficient welding, high brazing cost, and easy leakage. , a high-pressure aluminum plate-fin heat exchanger brazing method can be obtained that can accurately control the brazing temperature, short brazing time, and high brazing strength