Plate heat exchanger

Abstract

A plate heat exchanger consists of a plate stack through which pass heat-exchanging media preferably in a counterflow pattern. Its individual plates ( 8 ) are provided with embossments ( 9 ) by means of which consecutive plates ( 8 ) directly support one another. To obtain a plate heat exchanger suitable for counterflow operation while offering high compressive load resistance relative to both media and permitting cost-effective production in terms of material and labor, the plates ( 8 ) are provided with rows of trough-shaped sectional embossments ( 9 ). On all plates ( 8 ) these sectional embossments ( 9 ) are located on the same side, their rows extending parallel to and at a uniform distance (τ) from one another. Also, the rows of successively stacked plates ( 8 ) are situated above one another.

1 . Plate heat exchanger consisting of a plate stack through which pass heat-exchanging media preferably in a counterflow pattern and whose individual plates ( 8 ) are provided with embossments which serve as direct supports for consecutively superpositioned plates ( 8 ), characterized in that  
       The plates are provided with rows of trough-shaped sectional embossments ( 9 ) which are located on the same side of all plates ( 8 ), which rows extend parallel to and at a uniform distance (τ) from one another, and that the rows of consecutive plates ( 8 ) are positioned one above the other.  
     
     
         2 . Plate heat exchanger as in  claim 1 , characterized in that the sectional embossments ( 9 ) of neighboring plates ( 8 ) are mutually offset in the direction of the rows.  
     
     
         3 . Plate heat exchanger as in  claim 2 , characterized in that the offset (V P ) corresponds to half the length of the sectional embossment ( 9 ).  
     
     
         4 . Plate heat exchanger as in  claim 2  or  claim 3 , characterized in that the sectional embossments ( 9 ) of neighboring rows of a plate ( 8 ) are mutually offset in the direction of the row.  
     
     
         5 . Plate heat exchanger as in  claim 4 , characterized in that the offset (V) corresponds to half the length of the sectional embossment ( 9 ).  
     
     
         6 . Plate heat exchanger as in one of the preceding claims, characterized in that the plates ( 8 ) of the plate stack are rectangular in design, that the intake and, respectively, the discharge of the first heat-exchanging medium takes place at the two short sides ( 6 ) of the plates ( 8 ) while the intake of the second heat-exchanging medium takes place at one end, the discharge at the other end of the long sides ( 7   a  and  7   b , respectively) of the plates ( 8 ).  
     
     
         7 . Plate heat exchanger as in  claim 6 , characterized in that the rows composed of the sectional embossments ( 9 ) extend parallel to the short sides ( 6 ) of the plates ( 8 ).