A laminated integrated inner and outer fin heat exchange tube and its manufacturing method

Abstract

The invention relates to a heat exchange tube with stacked and integrated inner fins and outer fins. The heat exchange tube is formed by stacking and bonding a plurality of outer fin units with a certain thickness and a plurality of inner fin units with a certain thickness. Each outer fin unit comprises a first annular part and an outer extension part, wherein the end portion of the outer extension part is connected with an outer ring of the first annular part. Each inner fin unit comprises a second annular part and an inner extension part, wherein the end portion of the inner extension part is connected with an inner ring of the second annular part. The first annular parts and the second annular parts are sequentially stacked to form a tubular base tube of the heat exchange tube. The invention further relates to a manufacturing method of the heat exchange tube with the stacked and integrated inner fins and outer fins, wherein the manufacturing method comprises the steps of stamping, stacking and sintering. The heat exchange tube with the stacked and integrated inner fins and outer fins has both the advantages of a traditional outer fin tube and the advantages of a traditional inner fin tube, the inner fins, the outer fins and the base tube form a whole, the fins are compact in structure and large in area, thermal contact resistance between the fins and the base tube does not exist, as a result, vapor condensation performance and convective heat transfer performance are greatly enhanced, and the heat exchange tube can be applied to energy sources, chemical engineering, refrigeration, electronic heat dissipation and other fields.

Description

technical field [0001] The invention relates to the technical field of heat exchange enhancement, in particular to a laminated integrated inner and outer fin heat exchange tube and a manufacturing method thereof, which can be applied in fields such as energy, chemical industry, refrigeration, and electronic heat dissipation. Background technique [0002] Finned heat exchange tubes have been widely used in various types of heat exchange equipment and heating equipment. It mainly increases the outer surface area (or inner surface area) of the heat exchange tube by adding fins on the surface of the heat exchange tube, so as to improve The purpose of heat exchange efficiency. In order to improve its heat transfer performance, the commonly used methods are to increase the heat transfer area of ​​the finned tube, strengthen the channel, and reduce the contact thermal resistance between the fin and the base tube. [0003] At present, finned tubes used in heat exchangers are roughl...

AI Technical Summary

Problems solved by technology

Separate finned tubes have the problems of uncompact fin structure, single fin layout, and large contact thermal resistance, while integral finned tubes face the disadvantages of complicated process, high processing cost, and limited fin area. It is not conducive to the improvement of heat exchange efficiency of finned heat exchange tubes, and even difficult to meet the use requirements

In addition, there is no report on the related manufacturing method of the integral heat exchange tube with internal and external fins at the same time.

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