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 ( 2 ) of a fist medium, especially a gas, at least one second flow channel ( 3 ) of an at least second medium especially a cooling medium, at least one first disk ( 4 ), at least one second disk ( 5 ), the first disk and the second disk being interconnected and defining the first flow channel of the first medium, at least one housing element ( 6 ), especially a first housing element ( 7 ) and a second housing element ( 8 ) defining, together with the first disk and the second disk, the second flow channel of the second medium, wherein the first housing element can be cooled by the second medium.

1 . A heat exchanger, especially for cooling exhaust gases, comprising at least one first flow channel of a first medium, especially a gas, at least one second flow channel of an at least second medium, especially a cooling medium, at least one first disk, at least one second disk, the first disk and the second disk being interconnected and forming the first flow channel of the first medium, with at least one housing element, especially a first housing element and a second housing element forming, together with the first disk and with the second disk, the second flow channel of the second medium, wherein the first housing element can be cooled by the second medium. 
   
   
       2 . The heat exchanger as claimed in  claim 1 , wherein the second medium, especially cooling medium, is able to flow around substantially all of the first housing element. 
   
   
       3 . The heat exchanger as claimed in  claim 1  wherein the temperature of the first medium, especially of the exhaust gas of an internal combustion engine, prior to entering the heat exchanger is higher than the temperature of the second medium, especially of the cooling medium, prior to entering the heat exchanger. 
   
   
       4 . The heat exchanger as claimed in  claim 1 , wherein the first housing element is made of a first material, especially aluminum or plastics material, and the second housing element is made of another second material, especially steel. 
   
   
       5 . The heat exchanger as claimed in  claim 1 , wherein the second housing element has at least one housing opening, especially a first housing opening for an entry of the first medium into the first flow channel, especially a second housing opening for an exit of the first medium from the first flow channel, especially a third housing opening for an entry of the second medium into the second flow channel and especially a fourth housing opening for an exit of the first medium from the second flow channel. 
   
   
       6 . The heat exchanger as claimed in  claim 1 , wherein first housing element and the second housing element can be opened in at least one stacking direction S of the first disks and the second disks. 
   
   
       7 . The heat exchanger as claimed in  claim 1 , wherein the first housing element and the second housing element are interconnected with a material fit, especially by soldering, welding, bonding, etc., and/or interconnected with a form fit, especially by screwing, clipping, or by deformation such as folding, crimping, bordering, etc. 
   
   
       8 . The heat exchanger as claimed in  claim 1 , wherein the first housing element and the second housing element are sealed relative to one another using a sealing element, especially an O-ring, a square ring, a film seal, etc. 
   
   
       9 . The heat exchanger as claimed in  claim 1 , wherein the first disk and/or the second disk have projections, especially turbulence-generating elements. 
   
   
       10 . The heat exchanger as claimed in  claim 1 , wherein the first disks and/or the second disks each have at disk ends at least one cup. 
   
   
       11 . The heat exchanger as claimed in  claim 10 , wherein the cups each have at least one cup opening, especially for the passage of the first cooling medium. 
   
   
       12 . The heat exchanger as claimed in  claim 1 , wherein a respective first disk and a respective second disk form a pair of disks and are interconnected with a material fit, especially by soldering, welding, bonding, etc. 
   
   
       13 . The heat exchanger as claimed in  claim 12 , wherein a plurality of pairs of disks can be stacked on one another and are interconnected at cup opening edges with a material fit, especially by soldering, welding, bonding, etc. 
   
   
       14 . The heat exchanger as claimed in  claim 12 , wherein the pairs of disks form the first flow channels for the first medium, especially for exhaust gas to be cooled. 
   
   
       15 . The heat exchanger as claimed in  claim 12 , wherein adjacent pairs of disks are arranged set apart from one another, thus forming the second flow channels of the second medium, especially cooling medium. 
   
   
       16 . The heat exchanger as claimed in  claim 1 , wherein the second flow channels of the second medium, especially cooling medium, are formed at least between the first housing element and a disk pair edge surface. 
   
   
       17 . The heat exchanger as claimed in  claim 1 , wherein third flow channels of a third medium are formed next to the second flow channels. 
   
   
       18 . The heat exchanger as claimed in  claim 17 , wherein the third flow channels of the third medium are formed between the first housing element and the disk pair edge surfaces. 
   
   
       19 . The heat exchanger as claimed in  claim 17 , wherein the third flow channels are separated from the second flow channels, especially by at least one partition element. 
   
   
       20 . The heat exchanger as claimed in  claim 17 , wherein the second medium, especially cooling medium, of a high-temperature cooling circuit is able to flow through the second flow channels and a third medium, especially cooling medium, of a low-temperature cooling circuit is able to flow through the third flow channels. 
   
   
       21 . The heat exchanger as claimed in  claim 1 , wherein the first housing element is an integral part of at least one other component, especially a water jacket, a cylinder head of an internal combustion engine, a water tank of a coolant cooler, etc. 
   
   
       22 . The heat exchanger as claimed in  claim 1  wherein the heat exchanger has a second housing element but no first housing element.