Double-arc slanted-off finned tube non-contact thermal resistance heat transfer element

Abstract

The invention belongs to the technical field of heat exchange, and relates to a heat transfer element with double-arc inclined broken fins and a tube free of thermal contact resistance. The heat transfer element is applied to various heat exchangers, and is composed of the cooling fins and the rectangular heat transfer flat tube, the cooling fins are inclined arc-shaped corrugated broken fins, the cooling fins and the heat transfer flat tube are machined and formed integrally, and welding is not needed. Thermal contact resistance is avoided, and heat transfer efficiency is high. The manufacturing process is simple, the structure is compact, the size is small, the vibration resisting capacity is high, and therefore the heat transfer element can be widely applied to heat exchangers of air conditioners, refrigeration equipment, vehicles and other products.

Description

technical field [0001] The invention relates to a double-arc slanted-off finned tube non-contact thermal resistance heat transfer element applied to various heat exchangers, and belongs to the technical field of heat exchange. Background technique [0002] The heat transfer elements used in heat exchangers such as air conditioners, vehicles, and refrigeration equipment are generally composed of copper tubes, aluminum tubes or microchannel tubes and aluminum fins. The heat transfer tubes and cooling fins of the heat transfer elements are split The structure is usually connected by expansion tube or brazing method, and the manufacturing and processing technology is relatively complicated. The contact thermal resistance between the fin and the heat transfer tube is relatively large; and the anti-vibration ability is poor. Some heat exchangers (such as construction machinery) have a harsh working environment. The joints of the tubes tend to be partially loosened or even broken, ...

AI Technical Summary

Problems solved by technology

[0002] The heat transfer elements used in heat exchangers such as air conditioners, vehicles, and refrigeration equipment are generally composed of copper tubes, aluminum tubes or microchannel tubes and aluminum fins. The heat transfer tubes and cooling fins of the heat transfer elements are split The structure is usually connected by expansion tube or brazing method, and the manufacturing and processing technology is relatively complicated

The contact thermal resistance between the fin and the heat transfer tube is relatively large; and the anti-vibration ability is poor. Some heat exchangers (such as construction machinery) have a harsh working environment. The joints of the tubes tend to be partially loosened or even broken, which will also increase the thermal contact resistance, resulting in a significant decline in its heat transfer performance; at the same time, due to the lack of copper resources in my country, the copper used to manufacture heat transfer tubes in recent years Material prices are high, which greatly increases the production cost of heat exchangers

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