| 摘要 |
PURPOSE:To uniform the layer of frost between fins by a method wherein the surface of respective fins is formed into the shape of waveform and the width of waveform is constituted so as to be increased stepwisely as the fin approaches the outflow direction of airflow. CONSTITUTION:In the inflow part of airflow of the corrugated fin 4, the height H of the waveform of the corrugated fin 4 is low and the air stream is not disturbed so easily, therefore, an absolute humidity difference between ambient air and saturated humid air becomes small. As a result, the thickness of the layer 3 of frost at the inflow part of air of the corrugated fin 4 becomes thin. Since the height H between the crest and trough of the corrugated fin 4 is increased as the position of the fin approaches to the outflow direction of air, the disturbance of air is generated gradually and heat exchange is effected between cooled and dehumidified air whereby the layer 3 of frost is formed. Accordingly, the frost 3 on the surface of the corrugated fin 4 becomes the layer of frost having an uniform thickness and air ventilating path may be secured widely, therefore, the deterioration of heat exchanging amount may be reduced. |
