Heat exchange piece and heating appliance

Abstract

The invention relates to a heat exchange part which comprises a first heat exchange channel allowing a first heat exchange medium to pass through and a second heat exchange channel allowing a second heat exchange medium to pass through, the heat exchange part further comprises a pipe wall, the pipe wall separates the first heat exchange channel and the second heat exchange channel, the first heat exchange channel is defined by the inner surface of the pipe wall, and the pipe wall comprises a protruding heat exchange part. The protruding heat exchange parts are formed by bending two sections of pipe walls in the axial direction of the first heat exchange channel, the sides, facing the second heat exchange channels, of the protruding heat exchange parts protrude, and the second heat exchange channels are formed between the adjacent protruding heat exchange parts. Therefore, the problems of poor contact between the heat exchange sheets and the tubes and the like are solved, the heat transfer effect is better, tube expansion, welding and the like are not needed, the process is simple, the cost is low, the problem of water leakage is greatly solved due to the fact that welding between the heat exchange sheets and the tubes is not needed, and the product percent of pass is increased.

Description

technical field [0001] The invention relates to the technical field of heating, in particular to a heat exchange element and a heating appliance. Background technique [0002] At present, gas water heaters mainly use copper materials to make heat exchangers. Because tap water in some areas contains high electrolytes, electrolytes will cause electrochemical corrosion to copper heat exchangers, which will cause corrosion and leakage of gas water heaters. In some serious areas, copper The heat exchanger was corroded after only 3 months of use, affecting water safety. In order to improve the service life of gas water heaters and prevent corrosion and water leakage of heat exchangers, stainless steel heat exchangers are currently used in gas water heaters on the market. Compared with traditional copper heat exchangers, stainless steel heat exchangers have better corrosion resistance. However, most of the stainless steel heat exchangers on the market still use the traditional tub...

AI Technical Summary

Problems solved by technology

Due to the need for welding between the fin and the tube of the spiral finned tube, the welding process is complicated, the welding requirements are higher, and the lattice change is easy to occur, and the thermal resistance is large.

In addition, in order to prevent welding from damaging the tube wall and leaking water, the tube wall thickness needs to be thicker, and because the heat transfer coefficient of stainless steel is small, the heat transfer effect of the fins of the spiral finned tube is not high, the heat transfer effect is not ideal, and the heat transfer efficiency hard to improve

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