Heat exchanger, especially for motor vehicle, and method for producing such a heat exchanger

Abstract

The invention relates to a heat exchanger, notably for a motor vehicle, said exchanger comprising a core bundle for the exchange of heat between a first and a second fluid, said core bundle comprising a plurality of tubes ( 3 ) and a header tank ( 2 ), said tubes ( 3 ) and said tank ( 2 ) allowing said first fluid to circulate between them, said exchanger further comprising a retaining plate ( 16 ) for holding said tubes ( 3 ), said plate ( 16 ) being fixed to said tank ( 2 ), said tank ( 2 ) comprising a collector plate ( 6 ) provided with orifices through which said tubes ( 3 ) pass, said collector plate ( 6 ) being made of plastic. The invention also relates to a method of manufacturing such an exchanger.

1 . A heat exchanger, notably for a motor vehicle, said exchanger comprising:
 a core bundle for the exchange of heat between a first and a second fluid, said core bundle comprising a plurality of tubes and a header tank, said tubes and said tank allowing said first fluid to circulate between them; and   a retaining plate for holding said plurality of tubes, said retaining plate being fixed to said tank,   said tank comprising a collector plate provided with orifices through which said tubes pass, and   said collector plate being made of plastic.   
     
     
         2 . The exchanger as claimed in  claim 1 , wherein said retaining plate is attached externally to said tank. 
     
     
         3 . The exchanger as claimed in  claim 1 , wherein said retaining plate is attached to said collector plate. 
     
     
         4 . The exchanger as claimed in  claim 1 , wherein said tank comprises a cover, attached to said collector plate. 
     
     
         5 . The exchanger as claimed in  claim 4 , wherein said cover is made of plastic. 
     
     
         6 . The exchanger as claimed in  claim 4 , wherein said cover and said collector plate are fixed by welding. 
     
     
         7 . The exchanger as claimed in  claim 1 , further comprising a gasket through which said tubes pass. 
     
     
         8 . The exchanger as claimed in  claim 7 , wherein said gasket is situated outside said header tank. 
     
     
         9 . The exchanger as claimed in  claim 7 , wherein said gasket is compressed between said tubes and said collector plate ( 6 ) at an outline of said orifices provided in said collector plate for the passage of said tubes. 
     
     
         10 . The exchanger as claimed in  claim 1 , wherein said tubes are flared at their ends, said flare extending at least facing said retaining plate and/or said collector plate. 
     
     
         11 . The exchanger as claimed in  claim 1 , wherein said retaining plate is removable with respect to said header tank. 
     
     
         12 . A method of manufacturing an exchanger as claimed in  claim 1 , said method comprising:
 fixing said tubes to said retaining plate; and   attaching said retaining plate to said header tank.   
     
     
         13 . The method as claimed in  claim 12 , wherein fixing the tubes in the retaining plate comprises flaring said tubes in said retaining plate. 
     
     
         14 . The method as claimed in  claim 12 , further comprising: introducing said tubes into said collector plate, after fixing said tubes to said retaining plate and/or before attaching said retaining plate to said header tank. 
     
     
         15 . The method as claimed in  claim 14 , wherein introducing said tubes into said collector plate comprises force-fitting said tubes into said collector plate.