Patent ID: 7255158
Filing Date: 2007-08-14
Classification: F28D,F28F

Abstract:
1. A heat exchanger comprising: a plurality of tubes, the shapes of which are flat, laminated on each other; a core plate portion extended in a laminating direction of the plurality of tubes, into the insertion holes of which end portions of the tubes in the longitudinal direction are inserted and joined; and tanks communicated with the plurality of tubes, wherein a cross-section perpendicular to the longitudinal direction of the tube includes a pair of straight portions opposed to each other and a wall face portion for connecting end portions of the pair of straight portions to each other, a protruding portion extending in the laminating direction is formed toward the outside of the tank in a region of the core plate portion, in which the insertion hole is formed, corresponding the straight portion, and a straight portion joining portion of the insertion hole is located on the outside of the tank with respect to a wall face portion joining portion of the insertion hole.