Heat exchange for gas, particularly the exhaust gases of an engine

Abstract

A heat exchanger ( 1 ) for gas, in particular the exhaust gases of an engine, comprising a bundle of tubes arranged inside a shell ( 2 ) and intended for the circulation of gas with an exchange of heat with at least one stream of refrigerant fluid, said tubes being fixed by their ends between two support plates ( 5 ) coupled at each end of the shell ( 2 ), and deflection means arranged inside the shell ( 2 ) able to direct the at least one stream of refrigerant fluid inside the shell ( 2 ). The deflection means comprises a longitudinal deflector ( 6, 6 a ) substantially parallel to the tube bundle and intended to divide the shell ( 2 ) into two circuits, said deflector ( 6, 6 a ) being fixed by its longitudinal edges to the internal walls of the shell ( 2 ) and by its transverse edges to the two support plates ( 5 ) by welding. This ensures more effective mounting of said deflector inside the exchanger.

1 . A heat exchanger for the exhaust gases of an engine, comprising:
 a bundle of tubes arranged inside a shell for the circulation of gas with an exchange of heat with at least one stream of refrigerant fluid, said tubes being fixed by their ends between two support plates coupled at each end of the shell; and   deflection means arranged inside the shell able to direct the at least one stream of refrigerant fluid inside the shell, wherein the deflection means comprises a longitudinal deflector substantially parallel to the tube bundle and intended to divide the shell into two circuits, said deflector being fixed by its longitudinal edges to the internal walls of the shell and by its transverse edges to the two support plates by welding.   
     
     
         2 . The exchanger as claimed in  claim 1 , wherein the deflector includes in its longitudinal edges two folded peripheral fins configured to contact the internal walls of the shell for the connection by welding. 
     
     
         3 . The exchanger as claimed in  claim 1 , wherein the deflector includes in its transverse edges two protruding segments able to engage in respective grooves produced in the support plates for its connection by welding. 
     
     
         4 . The exchanger as claimed in  claim 1 , wherein the deflector comprises a closed surface to prevent communication between the two circuits in the shell. 
     
     
         5 . The exchanger as claimed in  claim 4 , which includes two pairs of inlet pipes and outlet pipes provided for distribution of two different streams of refrigerant fluid. 
     
     
         6 . The exchanger as claimed in  claim 1 , wherein the deflector comprises a through opening in its surface able to bring the two circuits into communication in the shell. 
     
     
         7 . The exchanger as claimed in  claim 6 , comprising a pair of inlet and outlet pipes arranged at a same end of the shell for distribution of a stream of refrigerant fluid.