Bending method of fin tube type heat exchanger

Abstract

The invention relates to a bending method of a fin tube type heat exchanger, in particular to a layered bending method of a multi-layer heat exchanger. The heat exchanger comprises at least two layers, wherein each layer is provided with a heat exchange pipe of the layer and a fin attached to the heat exchange pipe. The bending method comprises the following steps of: A, clamping the front section of the heat exchanger tightly by using a bending die and a clamping die; B, bearing the tail end of the first layer of the heat exchange tube of the heat exchanger by using a base plate, wherein the first layer of the heat exchanger is closest to the bending die, the second layer is closer to the bending die, and the rest may be deduced by analogy; C, rotating the bending die and the clamping die a requested angle according to a requirement and bending the first layer; D, resetting the bending die and the clamping die; E, driving the base plate to bear the tail end of the second layer of the heat exchange tube; and F, rotating the bending die and the clamping die the requested angle according to the requirement, bending the second layer and clinging the second layer to the first layer. By adopting the disclosed bending method, namely the layered bending method, a force applied to the heat exchanger can be reduced, and a fin is prevented from collapsing and being crushed.

Description

technical field [0001] The invention relates to a bending method for a tube-fin heat exchanger, in particular to a layered bending method for multilayer heat exchangers. Background technique [0002] As a compact heat exchanger, the tube-fin heat exchanger has a wide range of applications in the refrigeration industry. With the technical development of the air conditioning and refrigeration industry, and the further strict control of environmental protection regulations, the requirements for the heat exchange performance of the heat exchange unit itself are more stringent to compensate for the low performance of alternative refrigerants. Therefore, the heat exchanger structure (type of heat exchange tubes and fins) and the related heat exchanger forming process are important factors affecting the heat exchange performance, and are of great significance for improving the overall heat exchange performance of the heat exchanger. The forming process of the heat exchanger mainly...

AI Technical Summary

Problems solved by technology

In this process, the contact stress between the local fins and the bending mold is higher than that of the single-layer heat exchanger, which causes the local fins to be easily crushed after bending, and the tube-fin connection is loose and deformed, thus affecting the heat transfer performance and performance of the heat exchanger. reliability

Images