| 摘要 |
PROBLEM TO BE SOLVED: To prevent forming of fluid bypass parts on both sides of an inner fin 4 in a flat tube 3 having a pair of opposing faces and housing the inner fin 4. SOLUTION: The flat tube for the heat changer having the inner fin is provided having the flat tube 3 with both sides of a pair of opposing flat surface parts 1 integrally connected by an outwardly protruding curved surface part 2, and the inner fin 4 inserted into an interior of the flat tube 3 and corrugated at certain intervals. A height of the inner fin 4 is matched with an inner face height of the pair of opposing flat surface parts 1, and the inner fin 4 is arranged on an overall width of only the flat surface parts 1. A curved surface part closing means 5 comprising dimples or protruding lines protruding toward an inner face side is provided on the curved surface part 2. COPYRIGHT: (C)2004,JPO
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