| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure an amount of heat exchange in a heat exchanger in which a heat medium is circulated in a laminar flow region having a Raynolds number of 1,000 or less. <P>SOLUTION: An inner fin 33 is formed as a wave fin which has a plate part 331 extending in the longitudinal direction of a passage pipe and an apex 332 connecting between plate parts 331 adjacent to each other, and on which the cross-sectional shape perpendicular to the longitudinal direction of the passage pipe is corrugated, and the plate part 331 refracts in a corrugated shape in the longitudinal direction of the passage pipe when seen from a passage pipe lamination direction, and a wave pitch WP[mm], a wave depth WD[mm], and a passage width H[mm] are set so as to satisfy the relation of 2.2≤WP/WD≤4.28, and 0.5≤WD/H≤1.8. <P>COPYRIGHT: (C)2012,JPO&INPIT |
