| 摘要 |
PROBLEM TO BE SOLVED: To prevent brazing material from flowing inward from a tip of a multi-hole flat tube in a connection part of the multi-hole flat tube to a pipe header for a heat exchanger. SOLUTION: A contracted part 3a that is longer than thickness of the pipe header 1 is formed at a tip part of the flat tube 3, and a flat hole 2 matching the contracted part 3a is formed in the pipe header 1. As the contracted part 3a is engaged with the flat hole 2, both are brazed and fixed to each other. COPYRIGHT: (C)2004,JPO |
