| 摘要 |
PROBLEM TO BE SOLVED: To provide a fin for a heat exchanger capable of reducing the number of components and being produced easily in mass-production at low costs.SOLUTION: A number of through holes 2 and vertical belt parts 1 are alternately arranged in an X direction of a metal plate 13, a first through hole group 3 and a second through hole group 4 are arranged alternately via a horizontal belt part 5 in a number of stages in a Y direction, and both through holes 2 are shifted by a half pitch in the X direction. Then, folding back is performed at an intermediate portion of the first through hole group 3 and in the intermediate portion of the horizontal belt part 5 in a zigzag state and their opposing surfaces closely adhere to each other. |
