Baffle plate in a heat exchanger

Abstract

A heat exchanger for a motor vehicle, has an outer sheath and heat exchanger tubes are arranged in the outer sheath and a medium is feedable into the sheath on the front side and is removable on the opposite side, wherein a front plate is arranged in each case on the end side of the covering, wherein the front plate has openings through which the medium is transferrable into the heat exchanger tubes, and, in particular, the heat exchanger tubes at least partially reach through the openings, which heat exchanger is characterized in that flat surfaces are formed on the front plate on the border side between the openings, wherein guide elements are arranged indirectly or directly in front of the flat surfaces in the direction of flow, wherein the face areas of the directing elements overlap at least the flat surfaces in the direction of flow.

What is claimed is: 
     
         1 .- 9 . (canceled) 
     
     
         10 . A heat exchanger for a motor vehicle, in particular exhaust gas exchanger, comprising:
 an outer sheath;   heat exchanger tubes arranged in the outer sheath, wherein a medium is introducible into the sheath at a front side of the outer sheath and is dischargeable on a another side of the outer sheath opposite the front side;   a front plate arranged in the sheath at the front side of the outer sheath, said front plate having openings for passage of the medium into the heat exchanger tubes, said openings being configured as circular holes and are arranged offset to each other, and wherein even surfaces are formed between the openings at a border of the front plate; and   guide elements arranged in flow direction of the medium directly or indirectly upstream of the even surfaces, wherein a face area of the guide elements covers in flow direction at least the even surfaces.   
     
     
         11 . The heat exchanger of  claim 10 , wherein the heat exchanger tubes at least partially traverse the openings. 
     
     
         12 . The heat exchanger of  claim 10 , wherein the guide elements are configured as bulge that protrudes into an inner space of the heat exchanger. 
     
     
         13 . The heat exchanger of  claim 10 , wherein the guide elements have a tip and increase in size in the flow direction. 
     
     
         14 . The heat exchanger of  claim 13 , wherein the face area of the guide elements increases in the flow direction. 
     
     
         15 . The heat exchanger of  claim 14 , wherein the face area increases degressively. 
     
     
         16 . The heat exchanger of  claim 10 , wherein the guide elements are arranged spaced apart along a circumference of the front plate. 
     
     
         17 . The heat exchanger of  claim 10 , further comprising a flange coupled with the sheath, wherein the guide elements are arranged in the flange 
     
     
         18 . The heat of  claim 17 , wherein the flange is configured as a cast part, and wherein the guide elements are configured one-piece with and of a same material as the flange or are coupled in the flange as external components. 
     
     
         19 . The heat exchanger of  claim 17 , wherein an inner sheath surface of the flange and/or a surface of the guide elements is coated with a coating 
     
     
         20 . The heat exchanger of  claim 19 , wherein the coating is at least one of a thermally resistant and a flow optimized coating.