Fin and heat exchanger comprising the same

Abstract

A corrugated fin includes connection segments each of which is formed with louvers. Substantially circular arc segments are connected with the connection segments alternatively in a substantially longitudinal direction such that corrugations are formed and the arc segments form respective crests and troughs of the corrugations. 0≦H 2 ≦(H 1 −2R+2R sin β)/cos β, in which “H 2 ” is a length of the corresponding louver, “H 1 ” is a height of the fin, “R” is a radius of the corresponding arc segment, and “β” is an angle of inclination of the corresponding connection segment. A heat exchanger includes a first header, a second header spaced apart from the first header, and tubes spaced apart from each other and each of which is connected between the first and second headers in fluid communication therewith. Fins are each disposed between adjacent tubes.

1 . A corrugated fin comprising:
 a plurality of connection segments each of which is formed with a plurality of louvers; and   a plurality of substantially circular arc segments connected with said connection segments alternatively in a substantially longitudinal direction such that a plurality of corrugations are formed and said arc segments form respective crests and troughs of the corrugations, wherein 0≦H 2 ≦(H 1 −2R+2R sin β)/cos β, in which “H 2 ” is a length of corresponding said louver, “H 1 ” is a height of said fin, “R” is a radius of corresponding said arc segment, and “β” is an angle of inclination of corresponding said connection segment.   
     
     
         2 . A corrugated fin as set forth in  claim 1 , wherein said radius “R” is no less than about 0.1 mm and no greater than about 0.85 mm. 
     
     
         3 . A corrugated fin as set forth in  claim 1 , wherein said angle of inclination “β” is no less than about 5°. 
     
     
         4 . A corrugated fin as set forth in  claim 3 , wherein said angle of inclination “β” is no greater than about 20°. 
     
     
         5 . A corrugated fin as set forth in  claim 1 , wherein W×sin α≧0.6 mm, in which “W” is an interval between adjacent ones of said louvers and “α” is an angle of corresponding said louver. 
     
     
         6 . A corrugated fin as set forth in  claim 1 , wherein a pitch “P” of said fin is greater than about 2.5 mm. 
     
     
         7 . A corrugated fin as set forth in  claim 6 , wherein said pitch “P” is no less than about 2.8 mm and no greater than about 7 mm. 
     
     
         8 . A corrugated fin according to  claim 6 , wherein W×sin Δ≧0.6 mm, “W” is an interval between adjacent ones of said louvers, and “α” is an angle of corresponding said louver. 
     
     
         9 . A corrugated fin as set forth in  claim 8 , wherein 0.8 mm≦W×sin α≦3.0 mm. 
     
     
         10 . A heat exchanger comprising:
 a first header;   a second header spaced apart from said first header;   a plurality of tubes spaced apart from each other and each of which is connected between said first and second headers in fluid communication therewith; and   a plurality of corrugated fins each of which is disposed between adjacent ones of said tubes and includes:
 a plurality of connection segments each of which is formed with a plurality of louvers; and 
 a plurality of substantially circular arc segments connected with said connection segments alternatively in a substantially longitudinal direction such that a plurality of corrugations are formed and said arc segments form respective crests and troughs of the corrugations, wherein 0≦H 2 ≦(H 1 −2R+2R sin β)/cos β, in which “H 2 ” is a length of corresponding said louver, “H 1 ” is a height of said fin, “R” is a radius of corresponding said arc segment, and “β” is an angle of inclination of corresponding said connection segment. 
   
     
     
         11 . A heat exchanger as set forth in  claim 10 , wherein said tube includes two substantially straight segments and a plurality of bent segments each of which is connected between and twisted relative to said straight segments by a predetermined angle and none of said fins is disposed between adjacent ones of said bent segments. 
     
     
         12 . A corrugated fin as set forth in  claim 11 , wherein said radius “R” is no less than about 0.1 mm and no greater than about 0.85 mm. 
     
     
         13 . A corrugated fin as set forth in  claim 11 , wherein said angle of inclination “β” is no less than about 5°. 
     
     
         14 . A corrugated fin as set forth in  claim 13 , wherein said angle of inclination “β” is no greater than about 20°. 
     
     
         15 . A corrugated fin as set forth in  claim 11 , wherein W×sin α≧0.6 mm, in which “W” is an interval between adjacent ones of said louvers and “α” is an angle of corresponding said louver. 
     
     
         16 . A corrugated fin as set forth in  claim 11 , wherein a pitch “P” of said fin is greater than about 2.5 mm. 
     
     
         17 . A corrugated fin as set forth in  claim 16 , wherein said pitch “P” is no less than about 2.8 mm and no greater than about 7 mm. 
     
     
         18 . A corrugated fin according to  claim 16 , wherein W×sin α≧0.6 mm, “W” is an interval between adjacent ones of said louvers, and “α” is an angle of corresponding said louver. 
     
     
         19 . A corrugated fin as set forth in  claim 18 , wherein 0.8 mm≦W×sin α≦3.0 mm.