| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger capable of preventing a resin case from braking caused by freezing in winter.SOLUTION: In a resin case 10, a first flow passage 11 is separated into a plurality of rows, and a flow passage forming part 40 is provided which separates one row of the first flow passage 11 into a one direction flowing part 81 formed around an other direction piping part 22 and an other direction flowing part 82 formed around a one direction piping part 21. At the flow passage forming part 40, a hollow part 41 by space is formed. |
