Heat exchanger and plate used in a heat exchanger

Abstract

The aim of the invention is to provide a heat exchanger, in particular a stacked-plate cooler for a vehicle, which increases the heat transfer, thus maximising the utilisation of the heat transfer surface. To achieve this, the inventive heat exchanger ( 1 ) is equipped with several tray-shaped plates ( 2 a to 2 z ). Said plates ( 2 a to 2 z ) are placed on top of one another, are sealed together on their peripheral edge and are provided with passages ( 4 ). The passages ( 4 ) lying essentially above one another form a continuous flow channel ( 6 a to 6 d ) that traverses the plates ( 2 a to 2 z ) and adjacent flow channels ( 6 a to 6 d ) are traversed by different media (M 1 , M 2 ) from an inflow side to an outflow side, the respective flow channel ( 6 a to 6 d ) having an elongated cross-section (QS).

1 . A heat exchanger equipped with several tray-shaped plates which are placed on top of one another, are sealed together on their peripheral edges and are provided with passages, where passages lying essentially above one another form a continuous flow channel that traverses the plates, and where flow channels lying adjacent to one another are traversed by different media from an admission side to a discharge side, the respective flow channel having an elongate cross section.  
   
   
       2 . The heat exchanger as claimed in  claim 1 , in which the respective flow channel has an oval or rectangular cross section.  
   
   
       3 . The heat exchanger as claimed in  claim 1 , in which different, in particular adjacent flow channels have different cross-sectional shapes.  
   
   
       4 . The heat exchanger as claimed in  claim 1 , in which the elongate cross section of a flow channel has a length L and a width B, and there is a length to width ratio L/B of between 1.5 and 12, preferably between 1.5 and 6, particularly preferably between 1.5 and 3 or between 4 and 6.  
   
   
       5 . A heat exchanger as claimed in claimed  1 , comprising a stacked-plate cooler for a vehicle.  
   
   
       6 . A heat exchanger as claimed in  claim 1 , wherein the individual plates comprise passages which have an essentially elongate cross section.  
   
   
       7 . The heat exchanger as claimed in  claim 6 , in which the passages have a rectangular or oval cross section.  
   
   
       8 . The heat exchanger as claimed in  claim 6 , in which different passages have different cross-sectional shapes.  
   
   
       9 . The heat exchanger as claimed in  claim 6 , in which the elongate cross section of a passage has a length L and a width B, and there is a length to width ratio L/B of between 1.5 and 12, preferably between 1.5 and 6, particularly preferably between 1.5 and 3 or between 4 and 6.  
   
   
       10 . The heat exchanger as claimed in  claim 8 , wherein said different passages comprise adjacent passages  
   
   
       11 . A plate for use in a heat exchanger according to  claim 1 , comprising a plate having a plurality of passages, with two adjacent passages comprising parts of separate flow passages in the heat exchanger that are traversed by different media, and wherein the adjacent flow passages have an elongate cross-section.  
   
   
       12 . The heat exchanger as claimed in  claim 7 , in which the passages have a rectangular or oval cross section.  
   
   
       13 . The heat exchanger as claimed in  claim 7 , in which the elongate cross section of a passage has a length L and a width B, and there is a length to width ratio L/B of between 1.5 and 12, preferably between 1.5 and 6, particularly preferably between 1.5 and 3 or between 4 and 6.  
   
   
       9 . The heat exchanger as claimed in  claim 8  in which the elongate cross section of a passage has a length L and a width B, and there is a length to width ratio L/B of between 1.5 and 12, preferably between 1.5 and 6, particularly preferably between 1.5 and 3 or between 4 and 6.