| 摘要 |
PURPOSE:To make it possible to manufacture a finned heat exchanger highey generalpurposed with no limitation of the distance between fins even when heat transfer pipes with small pipe diameter are employed by a method wherein projected parts and recessed parts are provided on each flat plate fin and a fin collar is provided at each projected part and at each recessed part. CONSTITUTION:Projected parts 7 and recessed parts 8 are provided alternately on a flat plate fin 4 in the direction of the stage of heat transfer pipes 5 and fin collars 6 and 9 are prespectively provided at each projected part 7 and at each recessed part 8 in the order named. The recessed part 8 is brought into contact with the fin collar 6' provided at the projected part 7' of an adjacent flat plate fin 4'. Because the distance between fins L is the sum of the height l1 of the projected part 7' of the flat plate fin 4', the height l2 of the recessed part 8 of the flat plate fin 4 and the height l3 of the fin collar 6', even if l3 is limited in manufacturing, any distance between fins L can be realized by changing l1 and l2. Accordingly, even when heat transfer pipes with small diameter are employed, a heat exchanger with any distance between fins can be manufactured. Consequently, when a heat exchanger, in which small diameter heat transfer pipes are employed for aiming at a small-sized higher efficiency heat exchanger, is used as an evaporator, specifications preventing the bridging of condensate between fins and clogging of fins due to frosting from occurring can be easily manufactured.
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