Heat exchanger

Abstract

A heat exchanger (1) includes a top plate (2) and a bottom plate (3), wherein between the top plate (2) and the bottom plate (3) two heat exchanger stacks (4,7) are provided, wherein the heat exchanger stacks (4,7) are separated by a separating plate (6). The underlying problem of the present disclosure is to provide a heat exchanger (1) which can be adapted easily. This problem is solved by a heat exchanger (1), wherein first heat exchanger plates (5) forming the first heat exchanger stack (4) differ from second heat exchanger plates (8) forming the second heat exchanger stack (7).

What is claimed is: 
     
         1 . A heat exchanger comprising a top plate and a bottom plate,
 a plurality of heat exchanger plates arranged between the top plate and the bottom plate, wherein   adjacent heat exchanger plates cooperate to form fluid channels, wherein   several heat exchanger plates form a stack, wherein a first stack and a second stack are arranged between the top plate and bottom plate, wherein a separating plate is arranged between the first stack and the second stack, wherein   the first stack comprises a first fluid channel and a second fluid channel and the second stack comprises a third fluid channel and a fourth fluid channel, wherein the second fluid channel and the third fluid channel are fluidly connected, wherein the first stack is formed of first heat exchanger plates, and the second stack is formed of second heat exchanger plates, wherein   the first heat exchanger plates or the second heat exchanger plates are formed of single wall heat exchanger plates and the respective other heat exchanger plates are formed of double wall heat exchanger plates, or   the first heat exchanger plates and the and the second heat exchanger plates are formed of double wall heat exchanger plates.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein the first heat exchanger plates differ in form, material, construction and/or type from the second heat exchanger plates. 
     
     
         3 . The heat exchanger according to  claim 1 , wherein one of the first heat exchanger stack is a single wall heat exchanger stack formed of single wall heat exchanger plates. 
     
     
         4 . The heat exchanger according to  claim 1 , wherein one of the second heat exchanger stack is a double wall heat exchanger stack formed of double wall heat exchanger plates. 
     
     
         5 . The heat exchanger according to  claim 1 , wherein a flow direction of the second and third fluid channel is oriented from the first heat exchanger stack to the second heat exchanger stack. 
     
     
         6 . The heat exchanger according to  claim 1 , wherein the separating plate comprises at least one positioning geometry, which is configured to interact with at least one matching geometry of the first heat exchanger plate and/or second heat exchanger plate. 
     
     
         7 . The heat exchanger according to  claim 1 , wherein a second fluid is supplied to the second fluid channel, while a first fluid is supplied the first fluid channel and/or fourth fluid is supplied to the fourth fluid channel. 
     
     
         8 . A method to assemble a heat exchanger according to  claim 1 , wherein the method comprises the following steps:
 i. assembling the first heat exchanger stack of first heat exchanger plates,   ii. assembling the second heat exchanger stack of second heat exchanger plates,   iii mounting the first heat exchanger stack to the top plate,   iv. mounting the separating plate to the first heat exchanger stack,   V. mounting the second heat exchanger stack to the separating plate, and   vi. mounting the base plate to the second heat exchanger stack.   
     
     
         9 . The heat exchanger according to  claim 2 , wherein one of the first heat exchanger stack is a single wall heat exchanger stack formed of single wall heat exchanger plates. 
     
     
         10 . The heat exchanger according to  claim 2 , wherein one of the second heat exchanger stack is a double wall heat exchanger stack formed of double wall heat exchanger plates. 
     
     
         11 . The heat exchanger according to  claim 3 , wherein one of the second heat exchanger stack is a double wall heat exchanger stack formed of double wall heat exchanger plates. 
     
     
         12 . The heat exchanger according to  claim 2 , wherein a flow direction of the second and third fluid channel is oriented from the first heat exchanger stack to the second heat exchanger stack. 
     
     
         13 . The heat exchanger according to  claim 3 , wherein a flow direction of the second and third fluid channel is oriented from the first heat exchanger stack to the second heat exchanger stack. 
     
     
         14 . The heat exchanger according to  claim 4 , wherein a flow direction of the second and third fluid channel is oriented from the first heat exchanger stack to the second heat exchanger stack. 
     
     
         15 . The heat exchanger according to  claim 2 , wherein the separating plate comprises at least one positioning geometry, which is configured to interact with at least one matching geometry of the first heat exchanger plate and/or second heat exchanger plate. 
     
     
         16 . The heat exchanger according to  claim 3 , wherein the separating plate comprises at least one positioning geometry, which is configured to interact with at least one matching geometry of the first heat exchanger plate and/or second heat exchanger plate. 
     
     
         17 . The heat exchanger according to  claim 4 , wherein the separating plate comprises at least one positioning geometry, which is configured to interact with at least one matching geometry of the first heat exchanger plate and/or second heat exchanger plate. 
     
     
         18 . The heat exchanger according to  claim 5 , wherein the separating plate comprises at least one positioning geometry, which is configured to interact with at least one matching geometry of the first heat exchanger plate and/or second heat exchanger plate.