| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger with high heat exchange efficiency.SOLUTION: An inside of a flow channel through which a first fluid flows in a heat exchanger (EGR cooler 7) is partitioned into a plurality of passages 93, and in each of the passages, a plurality of fins 94 provided so as to stand from prescribed partition walls (ceiling wall 911, bottom wall 912) are disposed at a predetermined pitch in a main flow direction of the fluid. Each of the fins stand at a prescribed tilt angle α so that a standing end is positioned on the downstream side of the main flow direction with respect to a base end, and each of the fins are formed so that the shape projected on the projection surface orthogonal to the main flow direction is symmetrical to the center line of the passage on the projection surface, and the width is same or gradually decreases from the base end toward the standing end. |
