Heat exchanger for refrigerator and refrigerator having the same

Abstract

The present disclosure relates to a heat exchanger for refrigerator and a refrigerator having the same. The heat exchanger for refrigerator includes a plurality of heat transfer continuously arranged in multiple stages from a windward side to a leeward side, wherein the heat transfer fins disposed in the lower stage are offset in one of the column direction and the width direction from the plane's perspective.

1 . A heat exchanger for refrigerator comprising:
 a plurality of heat transfer fins continuously arranged in multiple stages from a windward side to a leeward side,   wherein the heat transfer fins disposed at upper and lower stages adjacent to each other are offset in one of a column direction and a width direction from the plane's perspective.   
     
     
         2 . The heat exchanger for refrigerator according to  claim 1 , wherein the heat transfer fins disposed at the upper and lower stages adjacent to each other are offset by a first distance in the column direction and offset by a second distance in the width direction. 
     
     
         3 . The heat exchanger for refrigerator according to  claim 1 , wherein the heat transfer fins positioned on the windward side are spaced apart from each other at a first fin pitch, and
 wherein the plurality of heat transfer fins positioned in multiple stages on the leeward side are spaced apart from each other at a second fin pitch smaller than the first fin pitch.   
     
     
         4 . The heat exchanger for refrigerator according to  claim 3 , wherein the heat transfer fins disposed at the upper and lower stages adjacent to each other among the heat transfer fins spaced apart from each other by the second fin pitch are offset by a predetermined distance in one of the column direction and the width direction. 
     
     
         5 . The heat exchanger for refrigerator according to  claim 4 , wherein an offset distance in the width direction is equal to or less than ½ of a height of the heat transfer fin. 
     
     
         6 . The heat exchanger for refrigerator according to  claim 1 , wherein leeward side end portions of the heat transfer fins are folded obliquely with respect to an air flow direction. 
     
     
         7 . The heat exchanger for refrigerator according to  claim 6 , wherein the heat transfer fins include body portions positioned on the windward side and folded portions formed by being folded from the leeward side end portions of the body portions, and
 wherein the folded portion is folded at an angle of no less than 5 degrees and no more than 20 degrees with respect to the body portion.   
     
     
         8 . The heat exchanger for refrigerator according to  claim 3 , wherein in the heat transfer fins disposed at the upper and lower stages adjacent to each other among the heat transfer fins disposed at the second fin pitch, windward side end portions of the heat transfer fins of the upper stage and leeward side end portions of the heat transfer fins of the lower stage are spaced apart from each other by less than 1 mm in a vertical direction. 
     
     
         9 . The heat exchanger for refrigerator according to  claim 1 , wherein the heat transfer fin includes a cut-and-erected portion that is cut and erected toward a heat transfer fin facing the heat transfer fin in the column direction. 
     
     
         10 . The heat exchanger for refrigerator according to  claim 9 , wherein height from a proximal end to a distal end of the cut-and-erected portion is smaller than the fin pitch between the heat transfer fins continuously disposed and facing each other. 
     
     
         11 . The heat exchanger for refrigerator according to  claim 10 , wherein at least one of an upper end portion and a lower end portion of the cut-and-erected portion forms a concave-convex shape. 
     
     
         12 . The heat exchanger for refrigerator according to  claim 1 , further comprising:
 a pair of heat transfer pipes passing through the heat transfer fins,   wherein a first center line in the width direction of the heat transfer fins and a second center line between the pair of heat transfer pipes are spaced apart from each other by a predetermined distance.   
     
     
         13 . The heat exchanger for refrigerator according to  claim 12 , wherein the heat transfer fins form a first heat transfer fin in which the first center line is positioned on one side in the width direction of the second center line and a second heat transfer fin in which the first center line is positioned on the other side in the width direction of the second center line. 
     
     
         14 . The heat exchanger for refrigerator according to  claim 13 , wherein among the heat transfer fins disposed at upper and lower stages adjacent to each other, the heat transfer fin positioned at the upper stage is formed as one of the first heat transfer fin and the second heat transfer fin and the heat transfer fin positioned at the lower stage is formed as the other of the first heat transfer fin and the second heat transfer fin. 
     
     
         15 . The heat exchanger for refrigerator according to  claim 13 , wherein among the heat transfer fins disposed at the upper and lower stages adjacent to each other, the first centerline of the heat transfer fins positioned at one of the upper stage and the lower stage is aligned with the second centerline, and
 wherein the heat transfer fins positioned at the other one of the upper stage and the lower stage are formed as one of the first heat transfer fin and the second heat transfer fin.   
     
     
         16 . A refrigerator comprising the heat exchanger for refrigerator according to  claim 1 .