Heat-exchanger offset fin and refrigerant heat-exchanger utilizing same

Abstract

A heat-exchanger offset fin is a heat-exchanger offset fin which is disposed among a plurality of refrigerant tubes arranged in parallel. A plurality of segments, each of which is an individual fin cut and lifted into strips from the rising surfaces and falling surfaces of the fin which is folded and formed into wave shapes, are disposed it an offset manner with intervals therebetween of at least two rows in the airflow direction. The length of each segment in airflow direction satisfies 0.5 mm ≦L≦1.2 mm. The number of divisions of each segment within a single pitch of the wave-shape fin is three or greater.

1 . A heat-exchanger offset fin which-is disposed among a plurality of refrigerant tubes arranged in parallel, wherein:
 a plurality of segments, each of which is an individual fin cut and lifted into strips from rising surfaces and falling surfaces of a fin which is folded and formed into a wave-shape, are disposed in an offset manner with intervals therebetween of at least two rows in an airflow direction;   a length of each of the segments in the airflow direction satisfies 0.5 mm≦L≦1.2 mm, and a number of divisions of each segment within a single pitch of the wave-shape fin is three or greater.   
     
     
         2 . The heat-exchange offset fin according to  claim 1 , wherein each of the segments having the number of divisions within a single pitch of the wave-shape fin of three or greater is repeatedly arrange d as a stepped shape with three or more steps. 
     
     
         3 . The heat exchanger offset fin according to  claim 1 , wherein each of the segments are inclined at a predetermined angle with respect to the airflow direction. 
     
     
         4 . A refrigerant heat-exchanger comprising the heat-exchanger offset fin described in  claim 1  among a plurality of refrigerant tubes arranged in parallel at a predetermined interval. 
     
     
         5 . The heat-exchanger offset fin according to  claim 2 , wherein each of the segments are inclined at a predetermined angle with respect to the airflow direction. 
     
     
         6 . A refrigerant heat-exchanger comprising the heat-exchanger offset fin described in  claim 2  among a plurality of refrigerant tubes arranged in parallel at a predetermined interval. 
     
     
         7 . A refrigerant heat-exchanger comprising the heat-exchanger offset fin describe in  claim 3  among a plurality of refrigerant tubes arranged in parallel at a predetermined interval.