| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger capable of bonding a heat transfer fin closely with heat transfer tubes comparatively simply and surely even though the expanding work of the heat transfer tube is impossible or brazing or the like is impossible for the reason of the material of the same. SOLUTION: In the heat exchanger wherein the heat transfer tubes 40, 41 for passing heat transfer fluid are provided so as to penetrate through a plurality of heat transfer fins 43, 48 in the lengthwise direction of the same, the heat transfer fins 43, 48 are provided with through holes 45, 46, 51, 52 for penetrating the heat transfer tubes 40, 41 while a notch 54, capable of expanding the opening of the same in for the penetration of the heat transfer tubes 40, 41 through the through holes 45, 46, 51, 52, is provided around the peripheral rims of the through holes 45, 46, 51, 52. |
