Patent ID: 6595272
Filing Date: 2003-07-22
Classification: B23K,F28D,F28F,Y10T

Abstract:
A double heat exchanger comprising:a first core for performing heat exchange between a first fluid and air flowing through said first core in an air-flowing direction, said first core having a plurality of first tubes through which the first fluid flows; a first header tank disposed at a longitudinal end of said first tubes to communicate with said first tubes; a second core for performing heat exchange between a second fluid and air flowing through said second core in said air-flowing direction, said second core having a plurality of second tubes through which the second fluid flows, said second core being disposed behind said first core in said air-flowing direction; a second header tank disposed at a longitudinal end of said second tubes to communicate with said second tubes; a first protrusion provided on said first header tank, said first protrusion having a contact part contacting a contact surface of said second header tank; and, magnesium for restricting removal of an oxidation coating being provided at one of said contact part of said first protrusion and said contact surface of said second header tank.