| 摘要 |
PURPOSE:To allow condensed water to easily drop and to suppress the increase of air resistance of an air flow and lowering of the efficiency of heat transfer by a method wherein drainage surfaces for intercommunicating flat fins in a direction of a stage are formed on a surface on the upper stream side and a surface on the downstream side and a surface on the downstream side of a flat groove between flat fins on the upper stream and the downstream side. CONSTITUTION:A title heat exchanger is provided with flat fins 6 on the upper stream side, flat fins 10 on the downstream side, and flat pipes 14 inserted in flat grooves 7 and 11 of each flat fins in the front and the rear part in a longitudinal direction in a state to be nipped between the flat fins 6 on the upper stream side and the flat fins 10 on the upper stream side continuously arranged in the direction of an air flow. Drainage surface 8 and 12 for intercommunicating the flat fins are formed in the direction of a stage on the surface, on the upper stream side on the flat grooves 7 and 11, of each of the flat fins 6 and 10 and the surface on the downstream side thereof. Thus, when a heat exchanger with a fin is used as a vaporizer and water drops are condensed on an outer surface, the water drops can drop on a lower stage in the direction of a stage along the drainage surfaces 8 and 12. This constitution effects excellent drop of water drops and enables suppression of the increase of draft resistance of an air flow and lowering of the efficiency of heat transfer. |
