PURPOSE: To permit to discharge condensed water, adheres to a surface between fins as well as the vicinity of connecting part between a refrigerant tube and the fin, to the outside of the heat exchanger easily by providing condensed water flow-down paths on the top of connecting part between the fin and a heat exchanging refrigerant tube.
CONSTITUTION: The fins for heat exchanger are manufactured by a method wherein a belt-like fin forming material 5 is formed with a plurality of long and slender punched holes 30b in the lengthwise direction with a predetermined interval by operating a press mold 6 up-and-down so as to remain crosspieces 30c. Subsequently, the fin forming material 5 is preformed by passing between forming rolls 7, 7 so that the punched hole 30b is situated at the bent top of corrugation and a corrugated structure is formed with a pitch somewhat larger than a specified pitch, further, the fin forming material is formed and compressed continuously until it is provided with the specified pitch by forming rolls 8, 8 and brake rolls 9, 9. Then, the bent top of corrugation of the fin forming material is connected to the heat exchanging refrigerant tube 2. According to this constitution, the condensed water on the connecting surface of the refrigerant tube as well as the surface of the fins is joined and flowed down through the condensed water flow-down paths 30b, thereafter, may be discharged to the outside of the heat exchanger.
SATOU OSANARU
TAKAHASHI YUKIYOSHI
KATOU TETSUYA
IOGAWA HIROSHI
| JPS5326694U | 1978-03-07 | |||
| JPS5426505A | 1979-02-28 |