| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of parts, to facilitate the manufacture, and to reduce the cost by providing a resistance part comprising fins to block the air flow provided on a bent part which is bent at a notched part on the air suction side of the fins. SOLUTION: In a fin-tube type heat exchanger 1, an upper fin 8 and a lower fin 9 of the heat exchanger are bent so as to form an angle at the prescribed position of a bent part 20 in the longitudinal direction, and the upper fin 8 of the heat exchanger is connected to the lower fin 9. A riser line 22 parallel to a heat transfer tube 7 in the step direction is provided on each bent part 20 of the fins, and a cut 21 of, for example, U-shape is provided so that the height (c) of a cut-and-erect part 11 is realized with reference to the riser line 22, and the cut 21 is made-and-erected in the piercing direction of the heat transfer tube. By constituting a wall to block the non-heat exchanged air by a part of the fins, no separate part need be mounted on the fins, and the number of parts and the assembly man-hour can be reduced. |
