| 摘要 |
A heat transfer fin (3) used in a heat exchanger (1) comprises a plate-like base section (4), a cylindrical collar section (5) which is provided raised from the base section (4), a recessed section (7) which has a sloped surface (7a) for connecting the root of the collar section (5) and the base section (4), and a flare section (6) which expands radially outward of the collar section (5) from the front end thereof along the entire circumference thereof and which, when combined with another heat transfer fin (3) used in the heat exchanger (1), is in surface contact with the sloped surface (7a) of the another heat transfer fin (3). The sloped surface (7a) of the recessed section (7) and the root of the collar section (5) are connected, the connection portion where the sloped surface (7a) of the recessed section (7) and the collar section (5) are connected is bent at an acute angle, and the root of the collar section (5) reaches a position beyond a reference plane (S) which is in contact with a surface (4a) of the base section (4), the surface (4a) being located on the side opposite the flare section (6). |
