Tube for heat exchanger

Abstract

Provided is a tube for a heat exchanger, and more particularly, a tube for a heat exchanger forming a channel of a heat exchange medium and including a plurality of inner holes having inner spaces separated in a width direction by a plurality of inner walls extending in a longitudinal direction, in which a thickness of outer walls of certain regions at both ends in the width direction of the tube is formed to be thicker than that of the remaining regions, thereby improving heat exchange performance and preventing corrosion.

What is claimed is: 
     
         1 . A tube for a heat exchanger provided in plural to form a channel of a heat exchange medium circulated in the heat exchanger and including a plurality of inner holes having inner spaces separated in a width direction by a plurality of inner walls and extending in a longitudinal direction, wherein a thickness of outer walls of regions located at both ends in the width direction is differently formed from that of the remaining regions. 
     
     
         2 . The tube of  claim 1 , wherein the tube includes a first reinforcing portion in which a thickness of outer walls located on both surfaces in a thickness direction among regions located at both ends in the width direction is formed to be thicker than that of the remaining regions. 
     
     
         3 . The tube of  claim 2 , wherein a thickness of the first reinforcing portion ranges from 0.2 to 0.25 mm and the thickness of the remaining regions ranges from 0.18 to 0.23 mm. 
     
     
         4 . The tube of  claim 2 , wherein the first reinforcing portion  132  is formed at both ends, respectively, as much as a length of 10 to 25% of an entire length in the width direction of the tube  100 . 
     
     
         5 . The tube of  claim 4 , wherein when a width of the tube is N (8 mm≦N≦20 mm), the number H num  of inner holes is 1.5N≦H num ≦3N. 
     
     
         6 . The tube of  claim 5 , wherein a thickness of the inner wall ranges from 0.1 to 0.15 mm and a width of the inner hole ranges from 0.25 to 0.5 mm. 
     
     
         7 . The tube of  claim 2 , wherein one side or both sides of the tube contacts a fin interposed between the adjacent tubes in the thickness direction and are formed flat in the width direction of the contact surface. 
     
     
         8 . The tube of  claim 7 , wherein the tube and the fin are formed so that lengths of the contacting surfaces are equal to each other. 
     
     
         9 . The tube of  claim 7 , wherein a thickness T 1  of surfaces located at both ends in the width direction is thicker than a thickness T 2  of surfaces located at both sides in the thickness direction. 
     
     
         10 . The tube of  claim 7 , wherein the tube includes a second reinforcing portion in which inner surfaces of surfaces located at both ends in the width direction protrudedly formed inwardly. 
     
     
         11 . The tube of  claim 10 , wherein a protruding height a 2  of the second reinforcing portion is equal to or greater than distances a 1  and a 3  from each edge to both ends in the width direction of the second reinforcing portion. 
     
     
         12 . The tube of  claim 7 , wherein the tube is an extruding tube. 
     
     
         13 . The tube of  claim 7 , wherein a hydraulic diameter ranges from 0.40 to 0.65 mm. 
     
     
         14 . The tube of  claim 7 , wherein a cross sectional ratio (cross sectional area of inner hole/entire tube area) of a passage ranges from 42 to 55%. 
     
     
         15 . The tube of  claim 1 , wherein the tube has a protrusion inwardly protruding on inner surfaces of both sides in the thickness direction. 
     
     
         16 . The tube of  claim 15 , wherein the protrusion is further formed on the inner wall.