Heat Exchanger

Abstract

The invention relates to a heat exchanger ( 1 ) having a plurality of tubes ( 4 ) and at least one box ( 3 ) that is closed by a bottom ( 2 ) provided with openings ( 6 ), at least one end ( 5 ) of the tubes ( 4 ) leading to said box. The invention is characterized in that the bottom ( 2 ) is provided with cams ( 7 ) and/or beads (7′)

1 . A heat exchanger having a plurality of tubes and having at least one tank which is closed off by means of a plate which is provided with openings and into which the at least one end of the tubes opens out, wherein the plate has lobes and/or beads. 
   
   
       2 . The heat exchanger as claimed in  claim 1 , wherein the lobes and/or beads are formed in the plate regions between the tubes. 
   
   
       3 . The heat exchanger as claimed in  claim 1 , wherein the lobes and/or beads are formed at the longitudinal-side ends of the plate. 
   
   
       4 . The heat exchanger as claimed in  claim 1 , wherein the lobes and/or beads rise in the longitudinal extent of the tubes toward the tank. 
   
   
       5 . The heat exchanger as claimed in  claim 1 , wherein the lobes and/or beads are formed by means of a shaping process. 
   
   
       6 . The heat exchanger as claimed in  claim 1 , wherein the openings which receive the tubes are formed as rim holes which extend in the direction of the tubes. 
   
   
       7 . The heat exchanger as claimed in  claim 6 , wherein the tubes end flush with, or project slightly beyond, the rim holes. 
   
   
       8 . The heat exchanger as claimed in  claim 1 , wherein the plate is of planar design with the exception of the lobes and/or beads and rim holes, and the longitudinal and narrow-side ends of the plate are bent around at an angle of 80 to 90° in the direction of the tank. 
   
   
       9 . The heat exchanger as claimed in  claim 1 , wherein the tank has a lug which protrudes in the direction of the plate and which is formed spaced apart from the periphery of the tank. 
   
   
       10 . The heat exchanger as claimed in  claim 9 , wherein a seal is arranged at the peripheral side of the lug. 
   
   
       11 . The heat exchanger as claimed in  claim 9 , wherein the seal is mounted on or injection-molded on. 
   
   
       12 . The heat exchanger as claimed in  claim 9 , wherein the seal has ear-like retaining elements which can be hooked into cutouts provided at the corners of the plate. 
   
   
       13 . The heat exchanger as claimed in  claim 9 , wherein the height of the lug corresponds approximately to the height of the lobes and/or beads. 
   
   
       14 . The heat exchanger as claimed in  claim 9 , wherein the lug bears against the lobes or beads. 
   
   
       15 . The heat exchanger as claimed in  claim 1  wherein the tank has, in the vicinity of its plate, on its inner peripheral side, inwardly extending ribs or projections. 
   
   
       16 . The heat exchanger as claimed in  claim 15 , wherein the ribs or projections bear against the lobes and/or beads. 
   
   
       17 . The heat exchanger as claimed in  claim 15 , wherein the height of the ribs or projections reduces in the direction into the tank. 
   
   
       18 . The heat exchanger as claimed in  claim 15 , wherein the openings for the tubes extend in between the ribs or projections.