Patent ID: 7389810

Claim:
A heat exchanger comprising: a core unit including a multiplicity of tubes and a multiplicity of fins stacked alternately with each other; tanks arranged at the ends in the longitudinal direction of the tubes of the core unit and communicating with the multiplicity of the tubes; and side plates arranged at the ends in the stacking direction of the tubes of the core unit and having the ends thereof coupled to the tanks; wherein the side plates each include a base portion in contact with the fins and side wall portions extending from the base portion in the stacking direction of the tubes; wherein the side wall portions are each formed with a bent deforming portion to facilitate the extension and shrinkage of the side wall portions in the longitudinal direction of the tubes by the bending deformation; wherein the base portion is divided in the longitudinal direction of the tubes by a slit formed at a position corresponding to the bent deforming portion; and wherein a pair of hooks extending toward of the bent deforming portion in opposed formed respectively at the slit side end of the base portion.