Heat exchanger fin, heat exchanger, condensers, and evaporators

Abstract

A heat exchanger fin, capable of improving heat transfer rate while preventing generation of heat bypass flow, such as a louver fin provided with a plurality louvers arranged at certain intervals in the introduction direction of air. The louvers are formed by cutting and bending the heat exchanger fin so that the air is passed while being guided by the louvers. The plurality of louvers include louvers different in louver width, the louver width being defined by a length of the louver along which the heat medium passes. Wider louvers and narrower louvers can be arranged alternatively.

Description

[0001] Priority is claimed to Japanese Patent Application No. 2003-140400 filed on May 19, 2003, and U.S. Provisional Application No. 60 / 478,360 filed on Jun. 16, 2003, the disclosure of which are incorporated by reference in their entireties. CROSS REFERENCE TO RELATED APPLICATIONS [0002] This application is an application filed under 35 U.S.C. § 111(a) claiming the benefit pursuant to 35 U.S.C. § 119(e) (1) of the filing date of Provisional Application No. 60 / 478,360 filed on Jun. 16, 2003 pursuant to 35 U.S.C. § 111 (b). TECHNICAL FIELD [0003] The present invention relates to a heat exchanger such as a car air-conditioning condenser or evaporator for use in car air-conditioning refrigeration cycles as a car air-conditioning apparatus for example. It also relates to a fin for use in heat exchangers (hereinafter referred to as “heat exchanger fin”) such as a louver fin or a corrugated fin to be equipped to the aforementioned apparatuses. BACKGROUND ART [0004] A heat exchanger such ...

AI Technical Summary

Benefits of technology

[0019] In the heat exchanger fin according to the present invention, since a plurality of louvers include plural kinds of louvers different in louver width, the heat medium such as air will be assuredly introduced into the gaps each formed between the adjacent louvers to flow smoothly along each louver, resulting in improved heat transfer rate by preventing generation of bypass flow of the heat medium.

[0111] In the evaporator according to the invention, in the same manner as mentioned above, the heat medium such as air will be assuredly introduced in between louvers to flow smoothly along each louver, enabling improvement of the heat transfer rate by preventing generation of bypass flow.

Problems solved by technology

However, the smaller louver pitch may cause clogging of sand and / or bridging of condensed water between the adjacent louvers 51, preventing the air A passing through the air passage 60 from being introduced into the louver gaps each formed between the adjacent louvers 51.

This causes the bypass flow of the air A, i.e., the air flow passing through the fin spaces each formed between the adjacent louver fins 50 without being introduced into the louver gaps, resulting in a deterioration of the heat transfer rate.

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