Heat exchanger with plate projections

Abstract

A plate heat exchanger including first and second sets of heat exchanger plates. The second set plates are alternately stacked with the first set plates to form flow channels therebetween. The first set plates have first projections protruding in one direction from the plane of the plates and second projections protruding in the opposite direction from the plane of the plate. The second set plates have third projections protruding in the one direction from the plane of the second set plates. The first projections are connected to adjacent second set plates and the second projections protrude into the space between at least two of the third projections. The second projections may be spaced from and not connected to the second set plates, with the height of the third projections from the second set plates being greater than the height of the first and second projections from opposite sides of the first set plates.

1 . A plate heat exchanger, comprising: 
 a first set of heat exchanger plates having first projections protruding in one direction from the plane of said plates and second projections protruding in the opposite direction from the plane of the plate; and    a second set of heat exchanger plates having third projections protruding in said one direction from the plane of said plates of said second set, said plates of said second set being alternately stacked with said plates of said first set of plates to form flow channels therebetween;    wherein said first projections are connected to the adjacent heat exchanger plate of the second set and said second projections narrow the flow channel by protruding into the space between at least two of said third projections.    
   
   
       2 . The plate heat exchanger of  claim 1 , wherein said first projections are connected to adjacent heat exchanger plates by solder.  
   
   
       3 . The plate heat exchanger of  claim 1 , wherein said first and second projections have an identical form.  
   
   
       4 . The plate heat exchanger of  claim 1 , wherein said first and second projections have different configurations from one another.  
   
   
       5 . The plate heat exchanger of  claim 1 , wherein the number, configuration and arrangement of said first and second projections are selected to optimize heat exchanger strength and heat exchange efficiency.  
   
   
       6 . The plate heat exchanger of  claim 1 , wherein said plates of both sets are trough-like with a protruding edge and inserted one in the other to connect on said edge.  
   
   
       7 . The plate heat exchanger of  claim 1 , wherein said second projections are spaced from and not connected to said plates of said second set of plates.  
   
   
       8 . The plate heat exchanger of  claim 1 , wherein said second protrusions are connected to the adjacent heat exchanger plate of the first set.  
   
   
       9 . The plate heat exchanger of  claim 1 , wherein said first projections lie against the plane of the adjacent plate of the second set of heat exchanger plates.  
   
   
       10 . The plate heat exchanger of  claim 1 , wherein said first and second projections have the same height (h), in opposite directions, from the plate from which they protrude.  
   
   
       11 . The plate heat exchanger of  claim 1 , wherein said first projections have a first height in one direction from the plate, and said second projections have a second height in the opposite direction from the plate, and said first and second heights are different.  
   
   
       12 . The plate heat exchanger of  claim 1 , wherein the height (H) of the third projections from the second set plates is greater than the height (h) of the first and second projections from opposite sides of the first set plates.  
   
   
       13 . The device of  claim 1 , wherein all of the plates of said first and second sets have at least four openings forming four channels through said stacked plates, two of said channels serving for feed or discharge of oil and the other two for feed or discharge of a coolant.  
   
   
       14 . The device of  claim 13 , further comprising annular deformations around said openings for selectively defining and blocking passages between said plate opening channels and said flow channels formed between said plates.  
   
   
       15 . The device of  claim 13 , further comprising deflecting deformations only partially around said plate openings of at least two of said plate opening channels to deflect the oil and/or coolant.  
   
   
       16 . The plate heat exchanger of  claim 1 , wherein said flow channels in which said first projections protrude are provided for coolant and the other flow channels into which said second projections protrude are provided for oil.