| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger that can enhance the heat-exchange performance of a specific site without changing the fin shape in a main cooling area.SOLUTION: An inner fin 34 has plural first fins 340 for splitting, into plural minute flow channels, a main flow channel in which heating medium flows, and plural second fins 341 which are formed in parallel to the heating medium flow direction from at the end portion 34a of the upstream side of the heating medium stream and the end portion 34c of the downstream side of the heating medium stream with respect to an area 34b where the plural first fins 340 are formed. All the fin pitches Fp1 to Fp3 and further to FpN' of the first fins 340 are equal to one another, and at least one fin pitch of the second fins 341 is different form the fin pitch of the other parts.SELECTED DRAWING: Figure 7 |
