Patent ID: 6478078
Filing Date: 2002-11-12
Classification: F28D,F28F,H01M,Y02E,Y02P

Abstract:
A heat exchanger for cooling a circulating water of a fuel cell, said heat exchanger comprising:a plurality of tubes made of aluminum, said tubes having an inner surface that defines an inner space in said tubes such that said circulating water is allowed to flow through said inner space; a plurality of fins alternately arranged with said tubes, said fins being assembled together with said tubes into a core portion of said heat exchanger; a tank assembled together with said core portion into an assembly; and a resin coating layer formed on said inner surface of said tubes such that said resin coating layer is in contact with said circulating water when said circulating water flows through said inner space, wherein said resin coating layer is prepared by a method comprising the sequential steps of: (a) brazing said assembly into a brazed body; (b) filling said inner space of said tubes of said brazed body with a coating liquid; and (c) discharging said coating liquid from said inner space.