Heat exchanger

Abstract

The invention relates to a heat exchanger, such as in particular an exhaust-gas evaporator, having a housing with a fluid inlet, and with a fluid outlet for a first medium, such as in particular exhaust gas, and having tubes which are arranged in the housing transversely with respect to the flow direction of the first fluid and through which a second medium can flow and which, by way of their ends at the inlet side and at the outlet side are arranged and connected in a fluid tight manner in a tube plate, wherein, to the respective tube plate, there is connected in each case one structure by means of which groups of tubes are connected to one another in such a way that an outlet of at east one tube is fluidically connected to an inlet of at least one other tube.

1 . A heat exchanger, such as in particular an exhaust gas evaporator, having a housing with a fluid inlet and a fluid outlet for a first medium, such as in particular exhaust gas, and having tubes which are arranged in the housing transversely with respect to the flow direction of the first fluid and through which a second medium can flow and the ends of which are arranged and connected in a fluidtight manner in a tube sheet at the inlet side and at the outlet side, wherein the respective tube sheet has connected to it in each case a structure by means of which groups of tubes are connected to one another in such a way that an outlet of at least one tube is fluidically connected to an inlet of at least one other tube. 
     
     
         2 . The heat exchanger as claimed in  claim 1 , wherein the structure comprises a deflection plate and a cover plate, wherein the deflection plate has openings which connect the outlets of one set of tubes to the inlets of the other set of tubes, and wherein the cover plate covers the deflection plate in a fluidtight manner. 
     
     
         3 . The heat exchanger as claimed in  claim 1 , wherein the deflection plate is placed on the respective tube sheet and is connected thereto, wherein the cover plate is placed on the respective deflection plate and connected thereto. 
     
     
         4 . The heat exchanger as claimed in  claim 1 , wherein the deflection plate is of one-piece design with the respective tube sheet, wherein the cover plate is placed on the respective deflection plate and connected thereto. 
     
     
         5 . The heat exchanger as claimed in  claim 1 , wherein the deflection plate is of one-piece design with the respective cover plate, wherein the deflection plate and the cover plate are placed on the respective tube sheet and connected thereto. 
     
     
         6 . The heat exchanger as claimed in  claim 1 , wherein the tubes are arranged in rows, wherein the deflection plate deflects fluid between tubes in different rows. 
     
     
         7 . The heat exchanger as claimed in  claim 1 , wherein the tubes are arranged in rows, wherein the deflection plate deflects fluid between tubes in the same row. 
     
     
         8 . The heat exchanger as claimed in  claim 1 , wherein the rows of tubes are arranged in segments, wherein the deflection plate deflects fluid from one segment into another segment. 
     
     
         9 . The heat exchanger as claimed in  claim 1 , wherein a plurality of tubes is connected in parallel, at least in one segment. 
     
     
         10 . The heat exchanger as claimed in  claim 1 , wherein a plurality of tubes connected in parallel is connected in series with one another, at least in one segment.