Welded pipe fin evaporator and manufacturing method thereof

Abstract

The invention discloses a welded pipe fin evaporator and a manufacturing method thereof. The manufacturing method includes the steps that punching is carried out on a clad aluminum plate with welding flux, and the clad aluminum plate obtained after punching is a fin plate; (2) punching and hole forming are carried out on the front face of the fin plate, and the back edge extends outwards to form a cone-shaped pipe after punching is carried out on the back face; (3) the fin plate and an adjacent fin plate are connected end to end, cone-shaped pipes are concentric after the fin plates are connected, and a pipe allowing liquid to flow is formed; (4) plugs are installed at the two ends of the pipe, and the pipe and an adjacent pipe form a passage; (5) assembled pipe fins are placed into a brazing furnace, and the clad aluminum plate with the welding flux is fused, welded and molded at the high temperature; and (6) connecting pipes are welded, and the welded pipe fin evaporator is formed. According to the technical scheme, the fins and the pipes are welded through connecting pieces to form a whole, and therefore the heat exchange efficiency of the fin evaporator is obviously improved, and the requirement for different refrigeration rate can be met.

Description

technical field [0001] The invention relates to a welded tube fin evaporator and a manufacturing method thereof, which is especially suitable for use on large refrigerators. Background technique [0002] In the modern refrigerator industry, the finned evaporator is a common air-cooled evaporator structure. Because it realizes heat exchange under the action of wind, it is widely used in large refrigerators due to the uniform heat exchange. Therefore, the air-cooled finned The sheet evaporator is an indispensable refrigeration accessory. [0003] In the prior art, finned evaporators are classified into two types, auxetic evaporators and push-in finned evaporators, according to processing methods. The auxetic evaporator first penetrates the metal pipeline into the fins punched with holes, and then uses the expansion head to extend into the metal pipeline to auxetic the metal pipeline, so that the pipe diameter increases after expansion and The fins are secured by an interfere...

AI Technical Summary

Problems solved by technology

Although both of these two processing methods use interference fit to make the metal pipes and fins fit closely, this fit method cannot ensure good contact between the tubes and fins. This is because of the following two points: First, due to There are many fins on the same tube of the finned evaporator. Whether it is an interference fit formed by expanding the tube or pushing it in, it is an interference fit between the entire metal tube and multiple fins. Any unevenness of the tube , the deformation of any one fin or the non-perpendicularity with the metal tube will make other fins not in good contact with the metal tube and have been fixed

It can be seen that the metal tubes and fins of these two finned evaporators cannot achieve good contact, which will affect the heat exchange efficiency of the finned evaporator

Images