| 摘要 |
PURPOSE:To improve the heat exchanger capacity of the heat exchanger by a method wherein circulation interrupting sections are provided at the rear ends of plate-like fins which form slit-like or louver-like openings with a number of slitted and formed strips so that the generation of a bypass flow of a fluid or the interference among the slitted and formed strips are controlled. CONSTITUTION:The fins 1 are provided with fin collars 1b to be fitted on a heat transfer pipe 2. Further, the fine collars 1b of one half of the fins 1 are formed in a direction making an angle of (90 deg.-alpha) with respect to the surface of each of the fins 1 and provide the louver-like openings 4 with the slitted and formed strios 3 formed in the opposite direction. On the other hand, the fin collars 1b of the remaining half of the fins 1 are formed in a direction making an angle of (90 deg.+alpha) with respect to the surface of each of the fins 1 and provide the louver- like openings 4 in the same direction. In addition, each of the fin collars 1b is formed in such dimensions that it serves as a distance piece when it has been fitted on the heat transfer pipe 2 and the front and rear ends of the adjoining plates fins 1 are overlapped each other with respect to the fluid flow direction so that it is possible to form the circulation interrupting sections 5 for the fluid W flowing between the adjoining plate fins. |
