Heat exchanger

Abstract

The invention relates to a heat exchanger, especially for cooling exhaust gases. Said heat exchanger comprises at least one first flow channel for a first medium, at least one second flow channel for a second medium, at least one bottom ( 1, 20, 121 ) that can be connected to the housing ( 101 ), said bottom ( 1, 20, 121 ) having at least one expansion element ( 24, 30, 40, 60, 70, 80, 81 ).

1 . Heat exchanger for exhaust gas cooling, having
 at least one housing,   at least one first flow duct for a first medium,   at least one second flow duct for a second medium,   at least one bottom which is connectable to the housing ( 101 ),   wherein   the bottom has at least one expansion element for the compensation of longitudinal extensions.   
     
     
         2 . Heat exchanger according to  claim 1 , wherein the expansion element is produced from metal. 
     
     
         3 . Heat exchanger according to  claim 1 , wherein the expansion element is at least one embossing which, in particular, can be introduced peripherally into the bottom. 
     
     
         4 . Heat exchanger according to  claim 1 , wherein the expansion element is expandable axially in a heat exchanger longitudinal direction (WLR). 
     
     
         5 . Heat exchanger according to  claim 1 , wherein the expansion element is expandable radially to a heat exchanger longitudinal direction (WLR). 
     
     
         6 . Heat exchanger according to  claim 1 , wherein the expansion element is at least one ridge. 
     
     
         7 . Heat exchanger according to  claim 1 , wherein the expansion element has at least one frame element. 
     
     
         8 . Heat exchanger according to  claim 7 , wherein at least two frame elements are arrangeable essentially parallel and, in particular, concentrically to one another. 
     
     
         9 . Heat exchanger according to  claim 7 , wherein the frame elements are at least in portions connectable in a materially integral manner, in particular by welding, soldering, adhesive bonding, etc. 
     
     
         10 . Heat exchanger according to  claim 7 , wherein the frame elements are at least in portions connectable with a form fit, in particular by screwing, flanging, folding, crimping, etc. 
     
     
         11 . Heat exchanger according to  claim 7 , wherein the frame elements are produced in one piece. 
     
     
         12 . Heat exchanger according to  claim 1 , wherein the expansion element is of meander-shaped design. 
     
     
         13 . Heat exchanger according to  claim 1 , wherein the expansion element is a concertina. 
     
     
         14 . Heat exchanger according to  claim 1 , wherein the expansion element is connectable to at least one diffuser. 
     
     
         15 . Heat exchanger according to  claim 1 , wherein the housing is a cast housing. 
     
     
         16 . Heat exchanger according to  claim 1 , wherein at least one connection piece and/or at least one fastening body are/is produced in one piece with the housing. 
     
     
         17 . Heat exchanger according to  claim 1 , wherein the bottom is connectable to the housing in a materially integral manner, in particular by welding, adhesive bonding, etc., and/or with a form fit, in particular by screwing, flanging, folding, crimping, etc. 
     
     
         18 . Heat exchanger according to  claim 1 , wherein the housing has at least two housing elements which are connectable to one another in a materially integral manner, in particular by welding, soldering, adhesive bonding, etc., and/or with a form fit, in particular by screwing, flanging, folding, crimping, etc. 
     
     
         19 . Heat exchanger according to  claim 1 , wherein the heat exchanger can have an I-flow throughflow. 
     
     
         20 . Heat exchanger according to  claim 1 , wherein the heat exchanger can have a U-flow throughflow. 
     
     
         21 . Heat exchanger according to  claim 1 , wherein the heat exchanger can have a single-flood or multi-flood throughflow. 
     
     
         22 . Heat exchanger, in particular according to  claim 1 , for exhaust gas cooling, having at least one housing,
 at least one first flow duct for a first medium,   at least one second flow duct for a second medium,   at least one bottom,   at least one diffuser,   at least one expansion element for the compensation of longitudinal extensions,   wherein the at least one expansion element is arrangeable, spaced apart at least in portions, between the bottom and the housing and, spaced apart at least in portions, between the bottom and the diffuser.   
     
     
         23 . Heat exchanger according to  claim 22 , wherein a first expansion element is arrangeable, spaced apart at least in portions, between the bottom and the housing, and a second expansion element is arrangeable, spaced apart at least in portions, between the bottom and the diffuser. 
     
     
         24 . Heat exchanger according to  claim 1 , wherein the at least one expansion element is a sealing element. 
     
     
         25 . Heat exchanger according to  claim 1 , wherein the first medium is exhaust gas and/or the second medium is a cooling medium, in particular an aqueous cooling fluid or air. 
     
     
         26 . Heat exchanger according to  claim 1 , wherein the first flow duct, in particular first flow ducts, are tubes, in particular flat tubes, and the first flow duct is formed between the tubes and the housing. 
     
     
         27 . Heat exchanger according to  claim 26 , wherein the tubes have turbulence-generating elements. 
     
     
         28 . Heat exchanger according to  claim 27 , wherein the turbulence-generating elements are embossings which can be introduced into the tube. 
     
     
         29 . Heat exchanger according to  claim 26 , wherein the tubes touch the housing at least in portions. 
     
     
         30 . Heat exchanger according to  claim 28 , wherein the embossings touch the housing at least in portions. 
     
     
         31 . Heat exchanger according to  claim 28 , wherein the embossings of at least one tube touch at least in portions at least one tube adjacent to the tube. 
     
     
         32 . Heat exchanger according to  claim 1 , wherein at least one first disk has a first disk topside and a first disk underside. 
     
     
         33 . Heat exchanger according to  claim 1 , wherein at least one second disk has a second disk topside and a second disk underside. 
     
     
         34 . Heat exchanger according to  claim 32 , wherein in each case a first disk is arrangeable in each case adjacently to a second disk, and the first disks and the second disks form a disk stack. 
     
     
         35 . Heat exchanger according to  claim 32 , wherein the first flow duct is formed between at least one first disk topside and at least one second disk underside and/or the second flow duct is formed between at least one first disk underside and at least one second disk topside. 
     
     
         36 . Heat exchanger according to  claim 32 , wherein the second flow duct is formed between at least one first disk topside and at least one second disk underside and/or the first flow duct is formed between at least one first disk underside and at least one second disk topside. 
     
     
         37 . Heat exchanger according to  claim 32 , wherein the first flow duct is formed between at least one disk and the housing. 
     
     
         38 . Heat exchanger according to  claim 32 , wherein the second flow duct is formed between at least one disk ( 303 ,  304 ,  403 ,  404 ) and the housing. 
     
     
         39 . Method for producing a heat exchanger, in particular according to  claim 1 , wherein the housing is produced by means of a forming manufacturing method. 
     
     
         40 . Method for producing a heat exchanger according to  claim 39 , wherein the housing is produced by casting, in particular expendable mold casting.