| 摘要 |
PURPOSE:To stabilize the heat exchange capacity regardless of the speed of air flow by a structure wherein sets of heat transfer pipes, one set of which consists of a plurality of heat transfer pipes, are juxtaposed in the direction of air flow to one another and a plurality of small holes are bored at the folded ends of corrugated fins arranged between said juxtaposed sets in order to easily fall droplets condensed on the fins so as to prevent air passages from being contracted by the droplets. CONSTITUTION:Corrugated fins 5 are attached to copper heat transfer pipes 4 under the state that folded ends 7 and 7' contact with the pipes 4. A large number of small holes 6 are bored at the folded ends 7 and 7'. The air flow runs in the direction of the arrow 8 among the fins 5 so as to face to the end surface of the aluminum corrugated fins 5, resulting in transmitting the heat of the air flow through the fins 5 to the copper pipes 4 in order to exchange heat between the air and the refrigerant flowing within the copper pipes 4. Consequently, the condensate collected to the lower folded ends 7 can be easily fallen to the lower part of a heat exchanger, resulting in enabling to suppress the increase of air resistance due to the stagnation of the condensate. Accordingly, the heat exchanger can stably display its capacity at all times. In addition, the scattering of the condensate to the exterior of the heat exchanger is made difficult, resulting in making the maintenance of external appliances easier. |
