Heat exchanger

Abstract

The present invention relates to a heat exchanger, which restricts a gap between a tube insertion hole formed on a header pipe for allowing both ends of a tube to inserted and combined thereto and the tube within a proper range, thereby making the manufacturing of the header pipes and the coupling of the tubes to the header pipe easy and preventing cracks and leak to improve durability.

1 . A heat exchanger comprising: a plurality of tubes arranged in parallel with one another; header pipes, each having tube insertion holes for allowing both ends of each tube to be inserted thereto and combined to the header pipes, each header pipe being formed by a single member or by connecting plural members; a reinforcing member bonded on the outer periphery of each header pipe in such a way as to be positioned at the side of tube insertion hole; radiation fins interposed between the tubes; and inlet and outlet pipes formed on the header pipe for introducing and discharging heat exchange medium therethrough,
 wherein a gap (S) between the tube insertion hole and the tube satisfies the following formula to satisfy necessary durability and make the coupling of the tubes to the header pipes easy:
   0.1 mm≦S≦2.5 mm. 
   
   
   
       2 . The heat exchanger according to  claim 1 , wherein if the heat exchanger is a gas cooler, the gap (S) between the tube insertion hole and the tube satisfies the following formula:
   0.1 mm≦S≦1.6 mm.   
   
   
       3 . The heat exchanger according to  claim 1 , wherein the reinforcing member has an inserted portion bent toward the inside of each tube insertion hole of the header pipe. 
   
   
       4 . The heat exchanger according to  claim 1 , wherein a thickness of the header pipe is within a range of 0.5 mm to 6 mm. 
   
   
       5 . The heat exchanger according to  claim 1 , wherein a thickness of the reinforcing member is within a range of 0.5 mm to 3 mm. 
   
   
       6 . The heat exchanger according to  claim 1 , wherein a sectional area of an inside flow channel of the header pipe is within a range of 20 mm 2  to 500 mm 2 .