Heat exchanger unit

Abstract

The present invention relates to a heat transfer unit, in particular a charge air cooler, having a housing in which first flow channels for a gas to be cooled, and second flow channels for a cooling medium are situated separately therefrom. It is essential to the invention here that the first flow channels are made of hollow metallic bodies, each of which is sheathed with plastic on their longitudinal ends to form a shared tube bottom, wherein the second flow channels are bordered by outsides of the hollow metallic bodies, the two tube bottoms and an inside of the housing which is made of plastic.

1 . A heat transfer unit, in particular a charge air cooler, having a housing in which first flow channels for gas to be cooled and separate second flow channels for a cooling medium are situated, wherein 
 the first flow channels are made of hollow metallic bodies which are sheathed with plastic on each of their longitudinal ends to form a shared tube bottom,    the second flow channels are bordered by outsides of the hollow metallic bodies, the two tube bottoms and an inside of the housing which is made of plastic.    
     
     
         2 . The heat transfer unit according to  claim 1 , wherein the housing comprises the two tube bottoms, two side walls, a cover and a bottom, whereby the cover and the bottom each have a cooling medium connection.  
     
     
         3 . The heat transfer unit according to  claim 1 , wherein two side walls of the housing joining the two tube bottoms to one another are integrally molded onto the two tube bottoms.  
     
     
         4 . The heat transfer unit according to  claim 1 , wherein two side walls of the housing joining the two tube bottoms together are manufactured together with the tube bottoms by injection molding.  
     
     
         5 . The heat transfer unit according to  claim 2 , wherein the cover and/or the bottom is/are welded to the remaining housing.  
     
     
         6 . The heat transfer unit according to  claim 1 , wherein at least a part of the housing is a component of an intake system of an internal combustion engine.  
     
     
         7 . The heat transfer unit according to  claim 1 , wherein the first flow channels are made of aluminum.  
     
     
         8 . The heat transfer unit according to  claim 1 , wherein the first flow channels have a rectangular cross section.  
     
     
         9 . The heat transfer unit according to  claim 1 , wherein the first flow channels have the same cross section and/or the same length.  
     
     
         10 . The heat transfer unit according to  claim 1 , wherein heat transfer elements are arranged inside the hollow bodies of the first flow channels.  
     
     
         11 . The heat transfer unit according to  claim 2 , wherein the cover and the bottom are designed as identical parts.  
     
     
         12 . The heat transfer unit according to  claim 1 , wherein the first flow channels run parallel to one another.  
     
     
         13 . The heat transfer unit according to  claim 2 , wherein the cover and/or the bottom has/have at least one reinforcing element.  
     
     
         14 . The heat transfer unit according to  claim 2 , wherein the cover is connected to the bottom by at least one web.