Patent ID: 6357521
Filing Date: 2002-03-19
Classification: F28D,F28F,Y10S

Abstract:
A heat exchanger comprising:a plurality of metal tubes through which fluid flows; and a metal header tank disposed at a flow-path end of the tubes to extend in an extending direction perpendicular to a longitudinal direction of the tubes and to communicate with the tubes, the header tank including first and second walls opposite each other, the first wall having a plurality of connection portions each of which is connected to each of the tubes, the second wall having a plurality of first reinforcement ribs which increase a rigidity of the header tank, wherein: the header tank substantially has a rectangular cross-section, and is constructed by connecting both a first tank member and a second tank member which have approximately the same shape; the connection portions are arranged in the direction perpendicular to the longitudinal direction of the tubes at a first pitch; the first reinforcement ribs are arranged in the direction perpendicular to the longitudinal direction of the tubes at a second pitch approximately equal to the first pitch; and the first reinforcement ribs are provided on a surface of the second wall, opposite to the connection portions.