Plate heat exchanger

Abstract

A plate heat exchanger, comprising a plurality of mutually facing plates that are hermetically coupled at at least one substantially peripheral portion and form at least two separate circuits for at least two fluids, each one of said plurality of plates having access ports that provide input ducts and output ducts for said at least two fluids, at least one portion of at least one face of at least one of said plurality of plates being uneven.

What is claimed is:  
     
         1 . A plate heat exchanger, comprising a plurality of mutually facing plates that are hermetically coupled at at least one substantially peripheral portion and form at least two separate circuits for at least two fluids, each one of said plurality of plates having access ports that provide input ducts and output ducts for said at least two fluids, wherein at least one portion of at least one face of at least one of said plurality of plates is uneven.  
     
     
         2 . The plate heat exchanger according to  claim 1 , wherein said at least one face provided with at least one uneven portion forms, together with the respective adjacent and facing plate, one of said at least two circuits.  
     
     
         3 . The plate heat exchanger according to  claim 1 , wherein at least one face of each one of said plurality of plates is uneven.  
     
     
         4 . The plate heat exchanger according to  claim 1 , wherein said at least one uneven portion is obtained by way of a mechanical process.  
     
     
         5 . The plate heat exchanger according to  claim 1 , wherein said at least one uneven portion is obtained by way of a chemical or electrochemical or chemical-physical process.  
     
     
         6 . The plate heat exchanger according to  claim 1 , wherein said at least one uneven portion is obtained by way of a process of the electronic type.  
     
     
         7 . The plate heat exchanger according to  claim 1 , wherein said plurality of plates are joined to each other by welding and/or braze welding.  
     
     
         8 . The heat exchanger according to  claim 1 , wherein said plates are mutually joined by interposing sealing gaskets.  
     
     
         9 . The heat exchanger according to  claim 1 , wherein said mechanical process is sanding or brushing or satin finishing or sandpapering or coining or drawing or pressing.  
     
     
         10 . The heat exchanger according to  claim 1 , wherein said at least one uneven portion is obtained by way of a process of the chemical or electrochemical type that comprises controlled corrosion.  
     
     
         11 . The heat exchanger according to  claim 1 , wherein said at least one uneven portion is obtained by way of a process of the electronic type that comprises controlled alteration or laser alteration or photoengraving.