Tube For Heat Exchanger

Abstract

A tube ( 10 ) for a heat exchanger is produced by folding a strip ( 11 ). One end ( 13 ) of the strip ( 11 ) is shaped in such a way as to constitute, after folding, a separating partition ( 12 ) having a curvilinear profile. According to one embodiment, the curvilinear profile is a looped profile, comprising a first part ( 12 a ) of loop and a second part ( 12 b ) of loop ending inside the first part ( 12 a ) of loop.

1 . A tube ( 10 ) for a heat exchanger produced by folding a strip ( 11 ), one end ( 13 ) of said strip ( 11 ) being shaped in such a way as to constitute, after folding, a separating partition ( 12 ) having a curvilinear profile, wherein said curvilinear profile is a looped profile, and said separating partition ( 12 ) is closed on itself. 
   
   
       2 . The tube ( 10 ) as claimed in  claim 1 , wherein said looped curvilinear profile comprises a first part ( 12   a ) of loop and a second part ( 12   b ) of loop ending inside said first part ( 12   a ) of loop. 
   
   
       3 . The tube ( 10 ) as claimed in  claim 2 , wherein said first ( 12   a ) and second ( 12   b ) parts of loop are substantially arc-of-circle shaped. 
   
   
       4 . The tube ( 10 ) as claimed in  claim 3 , wherein said second part ( 12   b ) of loop is brazed against an inside surface of said tube ( 10 ). 
   
   
       5 . The tube ( 10 ) as claimed in  claim 4 , wherein said second part ( 12   b ) of loop is brazed on a second flat section ( 44 ) which delimits the start of said first part ( 12   a ) of loop. 
   
   
       6 . The tube ( 10 ) as claimed in  claim 2 , wherein said first part ( 12   a ) of loop is constituted by a second flat section ( 44 ) followed by a curve through 180° which is followed by a third flat section ( 45 ) in common with said second part ( 12   b ) of loop, wherein said third flat section ( 45 ) is followed by a curve through 180° which ends in a fourth flat section ( 46 ) sandwiched between said second flat section ( 44 ) and said third flat section ( 45 ). 
   
   
       7 . The tube ( 10 ) as claimed in  claim 1 , wherein said separating partition ( 12 ) has along said loop a constant thickness (e 2 ) less than the thickness (e 1 ) of said tube ( 10 ). 
   
   
       8 . The tube ( 10 ) as claimed in  claim 2 , wherein said separating partition ( 12 ) has a first thickness (e 2 ) less than the thickness (e 1 ) of said tube ( 10 ) over the first part ( 12   a ) of loop, and a second thickness (e 3 ) less than the first thickness (e 2 ) over the second part ( 12   b ) of loop. 
   
   
       9 . The tube ( 10 ) as claimed in  claim 1 , wherein a first face ( 111 ) of the tube ( 10 ) is covered with a brazing layer ( 21 ) whilst a second face ( 112 ) of said tube ( 10 ) is covered with a layer ( 22 ) protecting against corrosion, said second face ( 112 ) delimiting the internal volume of said tube ( 10 ). 
   
   
       10 . A heat exchanger able to exchange heat energy between a first medium and a fluid which circulates inside a tube ( 10 ) as claimed in  claim 1 . 
   
   
       11 . The tube ( 10 ) as claimed in  claim 3 , wherein said first part ( 12   a ) of loop is constituted by a second flat section ( 44 ) followed by a curve through 180° which is followed by a third flat section ( 45 ) in common with said second part ( 12   b ) of loop, wherein said third flat section ( 45 ) is followed by a curve through 180° which ends in a fourth flat section ( 46 ) sandwiched between said second flat section ( 44 ) and said third flat section ( 45 ). 
   
   
       12 . The tube ( 10 ) as claimed in  claim 4 , wherein said first part ( 12   a ) of loop is constituted by a second flat section ( 44 ) followed by a curve through 180° which is followed by a third flat section ( 45 ) in common with said second part ( 12   b ) of loop, wherein said third flat section ( 45 ) is followed by a curve through 180° which ends in a fourth flat section ( 46 ) sandwiched between said second flat section ( 44 ) and said third flat section ( 45 ). 
   
   
       13 . The tube ( 10 ) as claimed in  claim 2 , wherein said separating partition ( 12 ) has along said loop a constant thickness (e 2 ) less than the thickness (e 1 ) of said tube ( 10 ). 
   
   
       14 . The tube ( 10 ) as claimed in  claim 3 , wherein said separating partition ( 12 ) has along said loop a constant thickness (e 2 ) less than the thickness (e 1 ) of said tube ( 10 ). 
   
   
       15 . The tube ( 10 ) as claimed in  claim 3 , wherein said separating partition ( 12 ) has a first thickness (e 2 ) less than the thickness (e 1 ) of said tube ( 10 ) over the first part ( 12   a ) of loop, and a second thickness (e 3 ) less than the first thickness (e 2 ) over the second part ( 12   b ) of loop. 
   
   
       16 . The tube ( 10 ) as claimed in  claim 4 , wherein said separating partition ( 12 ) has a first thickness (e 2 ) less than the thickness (e 1 ) of said tube ( 10 ) over the first part ( 12   a ) of loop, and a second thickness (e 3 ) less than the first thickness (e 2 ) over the second part ( 12   b ) of loop. 
   
   
       17 . The tube ( 10 ) as claimed in  claim 2 , wherein a first face ( 111 ) of the tube ( 10 ) is covered with a brazing layer ( 21 ) whilst a second face ( 112 ) of said tube ( 10 ) is covered with a layer ( 22 ) protecting against corrosion, said second face ( 112 ) delimiting the internal volume of said tube ( 10 ). 
   
   
       18 . The tube ( 10 ) as claimed in  claim 3 , wherein a first face ( 111 ) of the tube ( 10 ) is covered with a brazing layer ( 21 ) whilst a second face ( 112 ) of said tube ( 10 ) is covered with a layer ( 22 ) protecting against corrosion, said second face ( 112 ) delimiting the internal volume of said tube ( 10 ).