| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger that prevents fluid from being mixed due to the damage to a heat transfer wall, at the same time can secure superior heat transfer efficiency, and also can be easily manufactured. SOLUTION: In a heat exchanger, a heat transfer pipe 1 with a rectangular outer-periphery section shape is alternately positioned in each of two directions where a heat transfer pipe 1a for first fluid for allowing first fluid A to pass, and a heat transfer pipe 1b for second fluid for allowing second fluid B to pass, orthogonally cross the direction of a pipe core. Furthermore, the heat exchanger is integrated in a state where the outer-periphery plane parts of the adjacent heat transfer pipes 1a and 1b oppose and are in contact each other.
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