| 摘要 |
PROBLEM TO BE SOLVED: To prevent deformation of a mounting flange 42 provided to an upper tank 4A.SOLUTION: A heat exchanger 3 is provided with a mounting flange 42 around an upper tank 4A. At a corner part of the mounting flange 42, a fastening part 43 is formed. The mounting flange 42 has a tank side seal surface opposed to a case side seal surface 20a of a cooler case 2, a rib wall 44 folded back orthogonally to the tank side seal surface from a circumferential edge of the tank side seal surface is provided on the entire circumference of the tank side seal surface, and a height difference corresponding to a level difference of a case side is set between the tank side seal surface and the fastening part 43 via the rib wall 44. Namely. a level difference is provided between the tank side seal surface 42a and the fastening part 43 by a height portion of the rib wall 44. With this configuration, strength of the mounting flange 42 is increased, so that deformation of the mounting flange 42 can be suppressed when supercharging pressure is applied to the inside of the cooler case 2. |
