Plate heat exchanger plate and plate heat exchanger

Abstract

A plate heat exchanger plate with a main heat transfer portion comprising a first area comprising a first field with first corrugations arranged substantially on one side of a straight first line intersecting with second side edges and a second field with second corrugations arranged substantially on an opposite side of the first line is provided. The main heat transfer portion comprises a first outer area arranged between a first area and a first of the second side edges and extends along the first second side edge between two distribution portions. In the first outer area there are arranged first protrusions and recesses directed in a first general direction in relation to a straight second line parallel to one of first side edges. A plate with a straight first second edge may thus be provided when corrugations in the first area are directed in different directions.

1 . A plate heat exchanger plate delimited by two substantially parallel first side edges and two substantially parallel second side edges and provided with port holes adjacent a first distribution portion at a first end of said plate, port holes adjacent a second distribution portion at a second end of said plate, and between said first and second distribution portions a main heat transfer portion comprising a corrugation pattern, wherein said main heat transfer portion comprises a first area comprising a first field with first corrugations arranged substantially on one side of a straight first line intersecting with said second side edges and a second field with second corrugations arranged substantially on an opposite side of said first line, and wherein said first corrugations comprise ridges and grooves directed at an angle of between 0-<90 degrees with said first line measured in a clockwise or counter clockwise angular direction and said second corrugations comprise ridges and grooves directed at an angle of between >270-<360 degrees with said first line measured in said angular direction, wherein said main heat transfer portion comprises a first outer area arranged between said first area and a first of said second side edges and extends along said first second side edge between said first and second distribution portions, wherein in said first outer area there are arranged first protrusions and recesses directed in a first general direction in relation to a straight second line parallel to one of said first side edges. 
     
     
         2 . The plate according to  claim 1 , wherein said main heat transfer portion comprises a second outer area arranged between said first area and a second of said second side edges opposite to said first outer area and extends along said second of said second side edges between said first and second distribution portions, wherein in said second outer area there are arranged second protrusions and recesses directed in a second general direction in relation to said second line. 
     
     
         3 . The plate according to  claim 1 , wherein said first area comprises a third field with third corrugations comprising ridges and grooves arranged substantially on said one side of said first line and directed at an angle of between >90-<180 degrees from said first line in said angular direction and a fourth field with fourth corrugations comprising ridges and grooves arranged substantially on said opposite side of said first line and directed at an angle of between >180-<270 degrees from said first line in said angular direction. 
     
     
         4 . The plate according to  claim 1 , wherein said ridges and grooves of said first corrugations are directed at an angle of between >45-<90 degrees with said first line measured in said angular direction and said ridges and grooves of said second corrugations are directed at an angle of between >270-<315 degrees with said first line measured in said angular direction. 
     
     
         5 . The plate according to  claim 3 , wherein said ridges and grooves of said third corrugations are directed at an angle of between >90-<135 degrees with said first line measured in said angular direction and said ridges and grooves of said fourth corrugations are directed at an angle of between >225-<270 degrees with said first line measured in said angular direction. 
     
     
         6 . The plate according to  claim 2 , wherein said first general direction and/or said second general direction comprise/s one or more angles between 0-<90 degrees in relation to said second line. 
     
     
         7 . The plate according to  claim 2 , wherein said first outer area and/or said second outer area have/has a width measured in parallel with said second line, which is narrower than said first field measured in parallel with said second line. 
     
     
         8 . The plate according to  claim 2 , wherein said first and/or second protrusions and recesses in said first outer area and/or said second outer area comprise corrugations in the form of ridges and grooves. 
     
     
         9 . The plate according to  claim 8 , wherein in said first and second outer areas said ridges have a different width than said grooves measured across said ridges and grooves. 
     
     
         10 . The plate according to  claim 2 , wherein said first protrusions and recesses are directed in a first direction in relation to said second line and/or said second protrusions and recesses are directed in a second direction in relation to said second line. 
     
     
         11 . The plate according to  claim 1 , wherein said first side edges are short sides and said second side edges are long sides of said plate. 
     
     
         12 . The plate according to  claim 2 , wherein said first outer area and/or said second outer area are/is divided into two or more fields. 
     
     
         13 . A plate heat exchanger comprising a plate package of plate heat exchanger plates according to  claim 1 . 
     
     
         14 . The plate heat exchanger according to  claim 13 , wherein said plate heat exchanger plates are arranged alternately in said plate package such that a first outer area of one plate abuts a second outer area of an abutting plate. 
     
     
         15 . The plate heat exchanger according to  claim 13 , which is adapted for substantially parallel flow of at least two heat exchange fluid over said main heat transfer portion of plates in said plate package.