Copper aluminum heat exchanger of gas water heater and connecting method thereof

Abstract

A copper aluminum heat exchanger of a gas water heater comprises a shell, a straight pipe, heat exchanging fins, a U-shaped pipe, a coiler and a water inlet and outlet pipe. The copper aluminum heat exchanger is mainly characterized in that the shell and the heat exchanging fins are made of and formed through copper aluminum materials, and the straight pipe, the U-shaped pipe and the coiler are made of and formed through copper aluminum materials or copper materials; the copper aluminum materials comprise an aluminum material base body and a copper material covering layer arranged on the outer wall of the base body. The material cost of the heat exchanger can be effectively controlled, the heat exchanging efficiency is high, meanwhile, the smoothness of a heat exchanger water pipe can be ensured, and the service life of products is long. The invention further provides a connecting method for the copper aluminum heat exchanger of the gas water heater. The integral assembling procedure, the pre-welding procedure, the brazing filler metal assembling procedure and the integral brazing procedure are adopted, and therefore the welding problem between components in the heat exchanger can be effectively solved, and the production cost of the connecting procedure can be effectively reduced.

Description

technical field [0001] The invention relates to the field of burning appliances, in particular to a copper-aluminum heat exchanger of a gas water heater and a connection method thereof. Background technique [0002] The heat exchangers of gas water heaters include copper heat exchangers and aluminum heat exchangers, but the copper material of copper heat exchangers is scarce and the cost is high; while the mechanical strength of aluminum heat exchangers is low, and the water pipes in aluminum heat exchangers are easy to corrode . In order to solve the above problems, a copper-aluminum heat exchanger is proposed, which combines copper water pipes with aluminum heat exchange fins and shells, but this copper-aluminum heat exchanger is Welding between materials is difficult to achieve and is not actually used. In order to overcome these defects, a copper-aluminum heat exchanger for a gas water heater and its connection method have been developed. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0002] The heat exchangers of gas water heaters include copper heat exchangers and aluminum heat exchangers, but the copper material of copper heat exchangers is scarce and the cost is high; while the mechanical strength of aluminum heat exchangers is low, and the water pipes in aluminum heat exchangers are easy to corrode

In order to solve the above problems, a copper-aluminum heat exchanger is proposed, which combines copper water pipes with aluminum heat exchange fins and shells, but this copper-aluminum heat exchanger is Welding between materials is difficult to achieve and not actually used

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