| 摘要 |
PURPOSE:To largely increase the heat exchanging efficiency of a heat exchanger, by disturbing the air flow by providing blade projections and air through holes on the flat part of a corrugated fin in the state that they are gradually slipped off the direction of the draft toward both sides of a fin. CONSTITUTION:A heat exchanger 1 has refrigerant passages 4, and is composed of flattened tubes 2, consisting of aluminum extrusion-casted material being bent in the zigzag state, when they are observed from the flat surface, and corrugated fins 3, made of aluminum plate, disposed in the draft gap 5 between the straight tube parts 2a of flattened tubes 2 facing to each other. The fin 3 is composed of a number of flat parts 3a and bent parts 3b in the middle, and both edges of a fin 3 are respectively fixed to the wall surface of each straight tube part 2a, so that each flat part 3a neighboring to each other is slanted to form the shape of ? or an inverted ?, when they are observed from the side of a fin. Air through holes 7 are formed in the flat parts 3a of a fin, as well as risen blade projections 6 in parallel, extended to the width direction of a fin 3, being formed thereon. |
