Patent ID: 8593812

Claim:
A heat exchanger for cooling a heat generating body, the heat exchanger including a frame forming an outer casing and a fin member having a plurality of fins forming flow channels for a coolant, the fin member being placed in the frame, wherein the frame includes a first wall part to which an intervening member is welded so that the intervening member is interposed between the frame and the heat generating body, the intervening member having a different linear expansion coefficient from a linear expansion coefficient of the frame, the first wall part of the frame includes an elastically deformable portion configured to be deformable in a direction along a mounting surface of an outer surface of the first wall part, on which mounting surface the intervening member is placed, and the elastically deformable portion includes a protrusion protruding into the frame, the protrusion having a U-shaped groove configuration having a U-shaped cross section that opens outward of the frame and linearly extending along the mounting surface in a direction intersecting with a coolant flowing direction.