Method for manufacturing fin and flat tube assembly for heat exchanger

Abstract

The invention provides a method for manufacturing fin and flat tube assembly for heat exchanger, comprising the steps of step 1: taking a metal substrate and straightening, rolling the middle part of the metal substrate and forming the paired first wave-like protrusions; step 2: rolling the parts between the both ends of the metal substrate and the first wave-like protrusions, respectively, and forming the paired second wave-like protrusions;step 3: rolling the first wave-like protrusions and the second wave-like protrusions so that the wave pitch and the amplitude of the first wave-like protrusions and the second wave-like protrusions coincide with each other to form a wave-like fin; step 4: rolling each of the crest portion and trough portion of the wave-like fins and shaping the crest portion and the trough portion into a rectangle with rounded corners;and step 5: rolling each of the crest portion and trough portion so that the crests and troughs are inwardly formed. The invention further provides a method for manufacturing the flat tube. When the technical solution is applied, the requirements of having sufficient strength, free of welding and better welding of the flat tube assembly are met.

Description

technical field [0001] The invention relates to the field of heat exchanger equipment, in particular to a manufacturing method for a heat exchanger fin and flat tube assembly. Background technique [0002] At present, the fins used in the heat exchanger are all made of aluminum foil, which is relatively thin and the strength of the formed fins is low. And after the fins are inserted into the heat dissipation flat tubes, there is not enough space to smear flux to make it adhere to the surface of the aluminum foil material, so when welding, the fins and the heat dissipation flat tubes are poorly welded. [0003] At the same time, due to the insufficient strength of the fins, the fins need to be divided and inserted into the flat tubes in sections, and the efficiency of the installation process of the equipment is low. [0004] If the above method of dividing the fins to ensure their strength is adopted, it will easily lead to deformation and blockage at both ends of the fins,...

AI Technical Summary

Problems solved by technology

[0002] At present, the fins used in the heat exchanger are all made of aluminum foil, which is thinner and the strength of the formed fins is lower

And after the fins are inserted into the heat dissipation flat tube, there is not enough space to apply flux to make it adhere to the surface of the aluminum foil material, so when welding, the fins and the heat dissipation flat tube are poorly welded

[0003] At the same time, due to the insufficient strength of the fins, the fins need to be divided and inserted into the flat tubes in sections, and the efficiency of the installation process is low

[0004] If the above method of splitting the fins to ensure their strength is adopted, it will easily lead to deformation and blockage at both ends of the fins, and the original shape of the fins will be destroyed.

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