Corrugated fin and heat exchanger including the same

Abstract

A corrugated fin has flat plate sections each having a pair of lateral sides facing each other and a pair of end sides facing each other, and joining sections connecting with lateral sides of the flat plate sections. The flat plate sections and joining sections are alternately formed into a corrugated shape by bending. The joining section has an even surface joined to a tube through which a heat exchange medium flows, while the flat plate section includes a recess or protrusions in arbitrary sections taken along two directions including a direction in which the lateral sides are arranged and a direction in which the end sides are arranged, respectively.

1 . A corrugated fin for a heat exchanger, the corrugated fin comprising:
 a flat plate section and a joining section which are alternately formed into a corrugated shape by bending, said flat plate section having a pair of lateral sides facing each other and a pair of end sides facing each other, said joining section connecting with a lateral side of the pair of lateral sides of the flat plate section,   wherein said flat plate section has, on a surface thereof, a plurality of groove-shaped recesses that extend in a slant direction with respect to the pair of lateral sides of the flat plate section,   wherein each of the groove-shaped recesses comprises a first groove-shaped recess portion and a second groove-shaped recess portion which are separate from each other, and   wherein the first groove-shaped recess portion and the second groove-shaped recess portion are arranged alternately in a direction in which the lateral sides are arranged.   
     
     
         2 . The corrugated fin of  claim 1 , wherein:
 the first groove-shaped recess portion extends linearly starting from a predetermined point between the pair of lateral sides in a slant direction from one lateral side toward the other lateral side, and   the second groove-shaped recess portion extends linearly starting from another predetermined point between the pair of lateral sides in a slant direction from the other lateral side toward the one lateral side.   
     
     
         3 . The corrugated fin of  claim 1 , wherein:
 the joining section has an even surface joined to a tube through which a heat exchange medium is circulated, and   the even surface of the joining section is formed into a plane surface.   
     
     
         4 . The corrugated fin of  claim 2 , wherein:
 the joining section has an even surface joined to a tube through which a heat exchange medium is circulated, and   the even surface of the joining section is formed into a plane surface.   
     
     
         5 . The corrugated fin of  claim 1 , wherein:
 the joining section has an even surface joined to a tube through which a heat exchange medium is circulated, and   the even surface of the joining section is formed into a curved surface.   
     
     
         6 . The corrugated fin of  claim 2 , wherein:
 the joining section has an even surface joined to a tube through which a heat exchange medium is circulated, and   the even surface of the joining section is formed into a curved surface.   
     
     
         7 . A corrugated fin for a heat exchanger, the corrugated fin comprising:
 a flat plate section and a joining section which are alternately formed into a corrugated shape by bending, said flat plate section having a pair of lateral sides facing each other and a pair of end sides facing each other, said joining section connecting with a lateral side of the pair of lateral sides of the flat plate section,   wherein said flat plate section has, on a surface thereof, a plurality of groove-shaped recesses that extend in a slant direction with respect to the pair of lateral sides of the flat plate section,   wherein each of the groove-shaped recesses comprises a first groove-shaped recess portion and a second groove-shaped recess portion which are separate from each other,   wherein the first groove-shaped recess portion extends linearly starting from a predetermined point between the pair of lateral sides in a slant direction from one lateral side toward the other lateral side, and   wherein the second groove-shaped recess portion extends linearly starting from another predetermined point between the pair of lateral sides in a slant direction from the other lateral side toward the one lateral side.   
     
     
         8 . The corrugated fin of  claim 7 , wherein:
 the first groove-shaped recess portion extends linearly in a direction from one lateral side toward the other lateral side of the pair of lateral sides, slanting in a direction from one end side toward the other end side of the pair of end sides, and   the second groove-shaped recess portion extends linearly in a direction from one lateral side toward the other lateral side of the pair of lateral sides, slanting in a direction from one end side toward the other end side of the pair of end sides.   
     
     
         9 . A heat exchanger comprising the corrugated fin according to  claim 1 . 
     
     
         10 . A heat exchanger comprising the corrugated fin according to  claim 2 . 
     
     
         11 . A heat exchanger comprising the corrugated fin according to  claim 3 . 
     
     
         12 . A heat exchanger comprising the corrugated fin according to  claim 4 . 
     
     
         13 . A heat exchanger comprising the corrugated fin according to  claim 5 . 
     
     
         14 . A heat exchanger comprising the corrugated fin according to  claim 6 . 
     
     
         15 . A heat exchanger comprising the corrugated fin according to  claim 7 . 
     
     
         16 . A heat exchanger comprising the corrugated fin according to  claim 8 .