| 摘要 |
PROBLEM TO BE SOLVED: To prevent or to suppress the erosion of a fin, which is caused by the diffusion action of a brazing filler material in a heat exchanger in which a tube, a tank and the fins are joined by brazing. SOLUTION: By applying the brazing filler material 111b inside the tank 11, which is used for welding the tube 14 and the tank 11, the brazing filler material 111b is prevented from flowing into the fin 15 side being situated outside the tank 11. Consequently, lots of the brazing filler materials are prevented from being supplied on the fin 15 side, and the erosion of the fins 15, which is caused by lots of the brazing filler materials, is prevented or suppressed. |
