| 摘要 |
PURPOSE:To obtain a heat exchanger in which frost clogging is difficult to be generated and the heat transfer performance is excellent by disposing fins having cutup portions at the front part of the inlet port through which an air stream is introduced, and disposing fins having cutup portions at the rear part thereof. CONSTITUTION:A heat exchanger 11 having no cutup portion is provided at the inlet side of an air stream F and a heat exchanger 12 having cutup portions 3 is provided at the rear stream side. When the heat exchangers are disposed in this manner, gaps between fins 1 at the inlet portion where frost falls in large amounts, can be made large. Hence, frost clogging can be prevented. As a result, the heat exchanger according to the present invention can be operated for a longer time as compared with the heat exchanger of a conventional structure. Thus, it is possible to decrease uncomfortable feeling due to defrosting and also to decrease by 30% the consumption of energy due to defrosting. |
