Heat exchanging tube and heat exchanger

Abstract

The present invention relates to a heat exchange tube provided with a flat heat exchange tube main body having a predetermined length and a plurality of refrigerant passages extending longitudinally of the heat exchange tube and arranged transversely of the heat exchange tube. Satisfy the following relations (a) to (c): W=6 to 18mm...(a); Ac / At×100=50 to 70%...(b); P / L×100=350 to 450%...(c ), where "W" is the width of the heat exchange tube body, "Ac" is the total cross-sectional area of ​​the refrigerant channel, "At" is the total cross-sectional area of ​​the heat exchange tube body (including the refrigerant channel), "L " is the outer perimeter of the heat exchange tube body, and "P" is the total inner perimeter of the refrigerant passage. This heat exchange tube is light in weight, but can maintain sufficient pressure resistance and reduce channel resistance, thereby further improving its heat exchange performance.

Description

[0001] This application claims Japanese Patent Application No. 2002-290180, filed October 2, 2002, U.S. Provisional Patent Application No. 60 / 421,082, filed October 25, 2002, and Japanese Patent Application No. 60 / 421,082, filed September 19, 2003 Priority to Patent Application No. 2003-327179, the disclosure of which is hereby incorporated by reference in its entirety. [0002] Cross References to Related Applications [0003] This application is filed under 35 U.S.C § 111(a) and is claimed under 35 U.S.C § 119(e)(1) to the U.S. provisional application filed October 25, 2002 under 35 U.S.C § 111(b) Filing date entitlement of No. 60 / 421082. technical field [0004] The present invention relates to a heat exchanger, such as a condenser or an evaporator used in a refrigeration cycle of an automobile air conditioner, a household air conditioner, a refrigerator, an electronic equipment cooler, or similar products, and also relates to a method of the heat exchanger heat exchange ...

AI Technical Summary

Problems solved by technology

[0011] However, this method of weight reduction is considered to be limited, and further attempts to reduce weight according to this method would cause a reduction in the inherent heat exchange performance

For example, if the height of the heat exchange tube is lowered, the inner circumference of each refrigerant flow path is shortened, resulting in lower heat release performance; if the thickness of the outer peripheral wall of the heat exchange tube is set thinner, the pressure resistance capacity will be weakened

In addition, if the thickness of the fins is set thinner, the temperature difference between the portion where the fins are in contact with the heat exchange tubes and the portion where the fins are in the middle becomes larger, which also leads to a decrease in heat release performance.

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