| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the cracking of flat tubes at four corner parts of a core of a corrugated fin type heat exchanger. SOLUTION: Only end parts of the plurality of flat tubes 1 positioned at the corner parts of a flat surface of the core 3 are respectively inserted into tube insertion holes 6 of the same plate fin 5, and the flat tubes 1 adjacent to each other are connected with each other to constitute a reinforcement part 7. COPYRIGHT: (C)2005,JPO&NCIPI
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