Method of manufacturing an aluminum heat exchanger

Details Method of manufacturing an aluminum heat exchanger Method of manufacturing an aluminum heat exchanger

1991-11-18

1993-04-13

Cuda, Irene

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

2989003, 165133, 427327, B23P 1526

Patent

active

052011194

ABSTRACT:
A heat exchanger made of aluminum includes a plurality of tubes made of aluminum through which a fluid to be heat exchanged flows, the tubes having a metal surface of aluminum; fins made of aluminum arranged between the tubes for accelerating heat exchange between the fluid to be heat-exchanged and air, the fins having a metal surface of aluminum; a first protecting film of a chemical conversion coating formed on the metal surfaces of the tubes and fins and containing a metal component; and a second protecting film of an antimicrobial agent coating on the first protecting film, at least on the fins among the tubes and fins, the second protecting film having a chemical bond with the metal component of the first protecting film. An example of the antimicrobial agent is 2,2'-dithiobis(pyridine-1-oxide).

REFERENCES:
patent: 3900689 (1975-08-01), Deyrup
patent: 4830101 (1989-05-01), Ohara et al.
Patent Abstracts of Japan, vol. 9, No. 183 (M-400) [1906], Jul. 30, 1985; & JA-A-60 50 397 (Diesel Kiki K.K.) Mar. 20, 1985.
Patent Abstracts of Japan, vol. 11, No. 13 (C-397), Jan. 14, 1987; & JP-A-61 190 575 (Mitsubishi Heavy Ind., Ltd.) Feb. 20, 1985.
Patent Abstracts of Japan, vol. 12, No. 283 (C-518), Aug. 3, 1988; & JP-A-63 061 062 (Hitachi Ltd.) Sep. 1, 1986.

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