Plate Heat Exchanger

Abstract

A plate heat exchanger ( 10 ), in particular a brazed aluminium plate heat exchanger, has a heat exchange portion ( 12 ), which comprises two or more first passages ( 14 a ), through which a first fluid may flow, and two or more second passages ( 14 b ), through which a second fluid may flow, in such a way that heat exchange takes place between the first fluid and the second fluid. To reduce thermal stress inside the heat exchange portion ( 12 ), the heat exchange portion ( 12 ) comprises at least one layer ( 30 ) through which no fluid flows, which is arranged between two passages ( 14 a , 14 b ) through which fluid may flow.

1 . Plate heat exchanger ( 10 ), having a heat exchange portion ( 12 ), which comprises two or more first passages ( 14   a ), through which a first fluid may flow, and two or more second passages ( 14   b ), through which a second fluid may flow, in such a way that heat exchange takes place between the first fluid and the second fluid,
 characterized in that   the heat exchange portion ( 12 ) comprises at least one layer ( 30 ) through which no fluid flows, which is arranged between two passages ( 14   a ,  14   b ) through which fluid may flow.   
   
   
       2 . Plate heat exchanger according to  claim 1 ,
 characterized in that   the at least one layer ( 30 ) through which no fluid flows is arranged between two groups of two or more passages ( 14   a ,  14   b ) through which fluid may flow.   
   
   
       3 . Plate heat exchanger according to  claim 1 ,
 characterized in that   the at least one layer ( 30 ) through which no fluid flows takes the form of a closed cavity.   
   
   
       4 . Plate heat exchanger according to  claim 1 ,
 characterized in that   the at least one layer ( 30 ) through which no fluid flows takes the form at least in part of a solid layer.   
   
   
       5 . Plate heat exchanger according to  claim 3 ,
 characterized in that   at least one reinforcing element is provided in the at least one layer ( 30 ) through which no fluid flows.   
   
   
       6 . Plate heat exchanger according to  claim 1 , characterized in that
 a height dimension of the at least one layer ( 30 ) through which fluid does not flow corresponds at most to one height dimension of the passages ( 14   a ,  14   b ) through which fluid may flow.   
   
   
       7 . Plate heat exchanger according to one of  claim 1 , characterized in that
 a height dimension of the at least one layer ( 30 ) through which fluid does not flow corresponds to at least one height dimension of the passages ( 14   a ,  14   b ) through which fluid may flow.   
   
   
       8 . Plate heat exchanger according to  claim 1 ,
 characterized in that   the heat exchange portion ( 12 ) comprises a plurality of groups with two or more passages ( 14   a ,  14   b ) through which fluid may flow, between which there is in each case arranged at least one layer ( 30 ) through which fluid does not flow.   
   
   
       9 . Plate heat exchanger according to  claim 2 , characterized in that the at least one layer ( 30 ) through which no fluid flows takes the form of a closed cavity. 
   
   
       10 . Plate heat exchanger according to  claim 2 , characterized in that the at least one layer ( 30 ) through which no fluid flows takes the form at least in part of a solid layer. 
   
   
       11 . Plate heat exchanger according to  claim 4 , characterized in that at least one reinforcing element is provided in the at least one layer ( 30 ) through which no fluid flows. 
   
   
       12 . Plate heat exchanger according to  claim 2 , characterized in that
 a height dimension of the at least one layer ( 30 ) through which fluid does not flow corresponds at most to one height dimension of the passages ( 14   a ,  14   b ) through which fluid may flow.   
   
   
       13 . Plate heat exchanger according to  claim 3 , characterized in that
 a height dimension of the at least one layer ( 30 ) through which fluid does not flow corresponds at most to one height dimension of the passages ( 14   a ,  14   b ) through which fluid may flow.   
   
   
       14 . Plate heat exchanger according to  claim 4 , characterized in that
 a height dimension of the at least one layer ( 30 ) through which fluid does not flow corresponds at most to one height dimension of the passages ( 14   a ,  14   b ) through which fluid may flow.   
   
   
       15 . Plate heat exchanger according to  claim 5 , characterized in that
 a height dimension of the at least one layer ( 30 ) through which fluid does not flow corresponds at most to one height dimension of the passages ( 14   a ,  14   b ) through which fluid may flow.