| 摘要 |
PROBLEM TO BE SOLVED: To eliminate substances based on which formic acid adhering to gaps between refrigerant tubes and fins is formed in an FT heat exchanger having a structure in which a plurality of refrigerant tubes penetrates insertion holes formed in the fins that are a plurality of plate radiation fins.SOLUTION: A flare portion formed into a flange shape is provided on a tip end of a collar contacting with an adjacent fin, and a folded portion formed by folding a part of the flare portion so as not to contact the adjacent fin is provided in the flare portion. |
