| 摘要 |
PROBLEM TO BE SOLVED: To provide an air heat exchanger on which frost formation is hardly found by improving the shape of a fin.SOLUTION: The metallic fin penetrating through a refrigerant pipe is folded to alternately form mountain fold sections and valley fold sections, and line segments of folding lines of the mountain fold sections and the valley fold sections extend obliquely downward when observed from the direction for supplying the air to the air heat exchanger by the fan. |
