Denso Corporation

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Tatsuo Ozaki

Hajime Sugito

Kazuhiro Mitsukawa

Toshihide Ninagawa

Mitsuyoshi Saito

Shinta Mabuchi

Noriyuki Miyazaki

Tetsuya Sakakibara

Hideyuki Ota

Norio Yoshida

Masato Itou

Takahide Oohara

In a heat exchanger, when louvers are viewed from an airflow direction, a louver tip end width becomes shorter with increase of a louver height. A fin width of the fin is 14 mm or shorter. Airflow-end louver lengths of an upstream-end first louver, a downstream-end first louver, an upstream-end second louver, and a downstream-end second louver are '&#x215d;&#xd7;LP' or longer, where LP is a louver pitch.

Heat exchanger and manufacturing method thereof

A heat exchanger has a flat tube () having a curved portion (). A part of the curved portion () is formed by overlapping an outer rim () on an inner rim (). The inner rim () has a small curvature region (). The small curvature region () is inclined to a flat plate portion (), and is defined by a radius larger than a difference between a half of a thickness of the flat tube () and a thickness of the outer rim (). The small curvature region () is not beyond a center line (C) in a thickness of the flat tube (). The outer rim () extends beyond the center line (C). The outer rim () has an end face () placed on the small curvature region (). The flat tube () has flared portions () expanded at insertion holes ().

Heat exchanger

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Nagoya, Japan

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