| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve heat exchange performance and improve mass productivity while ensuring condensed water drainage performance and inhibiting sudden degradation in performance due to frosting.SOLUTION: A heat exchanger is configured so that many crests 201 and troughs 202 are alternately provided on a corrugated fin 2 in an air flow direction, and that a drainage path 206 formed of a stepped portion equal to or greater than a thickness of the corrugated fin 2 is provided in the troughs 202. This configuration enables the air to repeat separation and reattachment of a temperature boundary layer along the many crests 201 and troughs 202 to improve heat transfer performance, and inhibits degradation in performance caused by closure of an air flow path due to adhesion and growth of frosts, and enables condensed water in a case of using the heat exchanger as an evaporator to smoothly flow down from the drainage path 206 provided in the troughs 202. Furthermore, the drainage path 206 is excellent in mass productivity since no scraps are generated by punching.</p> |
