Denso Corporation

Other

Tomomi Takagi

Hitoshi Kuno

Toshiya Nagasawa

Kengo Kobayashi

Osamu Kasebe

Hiroaki Fukuda

Yasushi Okamoto

Yasushi Furukawa

Kenichi Morita

In a heat exchanger having tubes and fins, a polyaniline film made of polyaniline and/or a derivative thereof is formed on the surfaces of the tubes and the fins. This polyaniline film is imparted with at least one hydrophilic functional group selected from the class consisting of a primary amino group, a secondary amino group, a tertiary amino group, an ammonium group, a nitric acid group, a carboxyl group, a sulfonic acid group, a phosphonic acid group and a hydroxyl group. Accordingly, the surfaces of the tubes and the fins has good water wettability while maintaining deodorizing and sterilizing functions.

Base material having thereon polyaniline-containing film surface, and process for forming film surface on base material

On the surface of a heat exchanging portion in a heat exchanger, a film made of a polyaniline is formed. When the heat exchanger operates, condensed water is adhered on the surface of the heat exchanger, and contacts the film made of the polyaniline. Accordingly, oxygen dissolved in the condensed water becomes active oxygen by the polyaniline, and organic substances contained in the condensed water is decomposed. Thus, an amount of organic substances attached to a surface of the heat exchanger can be reduced in low cost without equipment extension.

Method for preventing contamination of heat exchanger and heat exchanger using this method

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Nagoya, Japan

Tomomi Takagi