| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger capable of preventing clogging of fine fluid flow channels with a brazing filler metal caused by flowing of excess molten brazing filler metal. SOLUTION: In this heat exchanger constituted by alternately stacking a number of tube elements 3 incorporating corrugated inner fins 17 forming a number of fine fluid flow channels by joining corrugated top portions 17A to an inner face of a tube material 7, and a number of outer fins 5 joined to outer faces of the tube elements 3 in an internal flow channel of the tube material 7, and joining the tube material 7 and the corrugated inner fin 17 constituting the tube element 3, and the tube elements 3 and the outer fins 5 to each other by brazing, a blocking portion 35 for blocking the flow of the molten brazing filler metal flowing along a joining part of the corrugated top portions 17A, is formed on an end portion along the longitudinal direction of the corrugated top portions 17A of the corrugated inner fins 17. COPYRIGHT: (C)2008,JPO&INPIT
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