Patent ID: 8656987
Filing Date: 2014-02-25
Classification: B21C,B21D,F28D,F28F,Y10T

Abstract:
1. A heat exchanger tube, characterised in that it consists of bent, shaped and welded sheet ( 3 ), and in that it has two flat walls ( 4 ) opposite one another and joined by two connecting walls ( 5 ), each of the flat walls ( 4 ) having at least two formed parallel longitudinal rows of first raised elements ( 8 , 9 ) designed, in practice, to space out and maintain in contact with one another two adjacent tubes ( 1 ), each first raised element having a main direction of extension, also being characterised in that the first raised elements ( 8 ) positioned on one flat wall ( 4 ) mirror those positioned on the other flat wall ( 4 ), relative to a plane of symmetry parallel with the flat walls ( 4 ) and passing through a longitudinal central axis of the tube, and in that, on each flat wall ( 4 ), the main direction of extension of the first raised elements ( 8 ) of one or more rows closest to a first connecting wall ( 5 a ) is set at an angle both to the longitudinal direction of the tube ( 1 ) and to a direction perpendicular to it, and the main direction of extension of the first raised elements ( 8 ) of one or more rows closest to the other connecting wall ( 5 ) is set at an angle both to the longitudinal direction of the tube ( 1 ) and to a direction perpendicular to it, on the opposite side relative to the direction of extension of the first raised elements ( 8 ) of the row closest to the first connecting wall ( 5 a ), and wherein at least one flat wall ( 4 ) has at least one higher second raised element ( 9 ); a portion ( 10 ) of one flat wall ( 4 ) which mirrors a second raised element ( 9 ) located on the other flat wall ( 4 ), relative to the plane of symmetry, being without raised elements.