| 摘要 |
PURPOSE:To easily drop drain from a flat refrigerant tube and to effectively and efficiently arrange fins at the tube by forming the upper surface of the tube in an oblique surface inclined from lateral upstream side along an air flowing direction toward a downstream side. CONSTITUTION:Heat exchangers 4, 6 are mounted along an air flowing direction laterally of a flat refrigerant tube 14 in a state that a pair of distribution tubes 11 are substantially vertical. With the exchangers 4, 6, when either one is used as an evaporator, drain is generated at the evaporator side, and condensed at the tube 14. The tube 14 is formed in a tapered state so that its upper surface 17a is formed in an oblique surface inclined from an upstream side of an air flowing direction toward a downstream side. Thus, since the drain condensed on the surface 17a of the tube 14 flows along the oblique lower side of the surface 17a, it is easily dropped in a drain pan disposed at the lower end side of the exchangers 4, 6. When a fin 19 is engaged from the other thin end side of the tube 14, an engaging groove 21 can be smoothly engaged with the tube 14. |
