Device for transferring heat

Abstract

The invention relates to a device for transferring heat and especially an evaporator, especially for the air-conditioning system of a vehicle comprising at least one collecting tank comprising at least two collecting chambers.

1 . A heat exchanger ( 1 ), in particular an evaporator for a vehicle air-conditioning system, having at least one header ( 2 ) with at least two manifold chambers ( 3 ,  4 ), substantially each manifold chamber ( 3 ,  4 ) in each case being delimited substantially via a base means ( 12 ) and a top part means ( 13 ), the top part means ( 13 ) of a first manifold chamber ( 3 ) comprising a first middle side wall ( 15 ), and the top part means ( 23 ) of a second manifold chamber ( 4 ) comprising a second middle side wall ( 25 ), the base means and the top part means being produced from a single part, with auxiliary bending elements being provided at least at locations in which the base means and the top part means and/or the top part means and a side wall adjoin one another.  
   
   
       2 . The heat exchanger as claimed in  claim 1 , characterized in that the auxiliary bending elements are regions of reduced wall thickness, such as preferably individual lines and/or points or a plurality of lines and/or points.  
   
   
       3 . The heat exchanger as claimed in  claim 1 , characterized in that the auxiliary bending elements are introduced by stamping operations.  
   
   
       4 . The heat exchanger as claimed in  claim 1 , characterized in that the auxiliary bending elements have a wall thickness reduction in the range from 10% to 50% compared to the normal wall thickness.  
   
   
       5 . The heat exchanger as claimed in  claim 1 , characterized in that the auxiliary bending elements have a wall thickness reduction in the range from 20% to 40% compared to the normal wall thickness.  
   
   
       6 . The heat exchanger as claimed in  claim 1 , characterized in that the first middle side wall ( 15 ), at least over a section, is arranged adjacent to the second middle side wall ( 25 ), a lateral distance between the first middle side wall ( 15 ) and the second middle side wall ( 25 ), over at least part of a height ( 69 ) of the header ( 2 ), increasing with the height above the base means ( 12 ) or remaining constant.  
   
   
       7 . The heat exchanger as claimed in  claim 6 , characterized in that the gap ( 22 ) between the first and second middle side walls ( 15 ;  25 ) is substantially V shaped.  
   
   
       8 . The heat exchanger as claimed in  claim 6 , characterized in that at least one stability means is arranged on at least one side wall ( 14 ,  15 ;  24 ,  25 ) in order to increase the stability.  
   
   
       9 . The heat exchanger as claimed in  claim 8 , characterized in that a longitudinal direction of at least one stability means ( 31 ,  35 ) is oriented substantially perpendicular to the base means ( 12 ).  
   
   
       10 . The heat exchanger as claimed in  claim 8 , characterized in that at least one stability means ( 35 ) is formed as a recess means ( 35 ).  
   
   
       11 . The heat exchanger as claimed in  claim 8 , characterized in that at least one stability means ( 35 ) is substantially in the form of a groove means ( 35 ).  
   
   
       12 . The heat exchanger as claimed in  claim 8 , characterized in that at least one stability means ( 35 ) is substantially in the form of a notch ( 35 ).  
   
   
       13 . The heat exchanger as claimed in  claim 8 , characterized in that at least one stability means ( 31 ) projects outward.  
   
   
       14 . The heat exchanger as claimed in  claim 13 , characterized in that at least one stability means ( 31 ,  35 ) is in the form of a bead means ( 31 ).  
   
   
       15 . The heat exchanger as claimed in  claim 8 , characterized in that a depth ( 36 ) of at least one stability means ( 31 ,  35 ) increases with the distance ( 29 ) from the base means ( 21 ).  
   
   
       16 . The heat exchanger as claimed in  claim 1 , characterized in that a base recess ( 30 ) is arranged in a region of contact between the middle side walls ( 15 ,  25 ) and the base means ( 12 ).  
   
   
       17 . The heat exchanger as claimed in  claim 1 , characterized in that at least one flat tube ( 40 ) has a lower wall thickness ( 42 ,  45 ) in the region of a flank ( 49 ) than in the region of a radius ( 43 ).  
   
   
       18 . The heat exchanger as claimed in  claim 17 , characterized in that at least one flat tube ( 40 ) has a wall thickness ( 45 ) which is at least 20% lower in the region of the flanks ( 49 ) than in region of the radius.  
   
   
       19 . The heat exchanger as claimed in  claim 17 , characterized in that at least one flat tube ( 40 ) has a wall thickness of approximately 0.3 mm at at least one location in the region of the flanks ( 49 ).  
   
   
       20 . The heat exchanger as claimed in  claim 17 , characterized in that at least one flat tube ( 40 ) has a wall thickness ( 44 ) of approximately 0.5 mm at at least one location in the region of a radius ( 43 ).  
   
   
       21 . The heat exchanger as claimed in  claim 1 , characterized in that at least one top part means ( 13 ,  23 ) is produced as a single piece.  
   
   
       22 . The heat exchanger as claimed in  claim 1 , characterized in that at least one top part means ( 13 ,  23 ) is produced as a single piece with the base means ( 12 ).  
   
   
       23 . The heat exchanger as claimed in  claim 1 , characterized in that at least one connection opening ( 6 ,  7 ) is arranged on a longitudinal side section ( 8 ) of the header ( 2 ).  
   
   
       24 . The heat exchanger as claimed in  claim 1 , characterized in that the header ( 2 ) is connected to two rows of heat transfer tubes ( 9 ) arranged one behind the other.  
   
   
       25 . The heat exchanger as claimed in  claim 1 , characterized in that the base means ( 12 ) is formed out of a prepared metal plate.  
   
   
       26 . The heat exchanger as claimed in  claim 1 , characterized in that at least one side wall ( 14 ,  15 ,  24 ,  25 ) is provided with at least one tab ( 19 ) which is inserted into a cutout ( 21 ) in the base means.  
   
   
       27 . The heat exchanger as claimed in  claim 1 , characterized in that a closure cover ( 5 ) is arranged on at least one end ( 38 ) of at least one manifold chamber ( 3 ,  4 ).  
   
   
       28 . The heat exchanger as claimed in  claim 1 , characterized in that at least one connection opening ( 6 ,  7 ) is arranged at an end ( 38 ) of at least one manifold chamber ( 3 ,  4 ) of the header ( 2 ).