Plate Heat Exchanger

Abstract

The invention relates to a plate heat exchanger that includes a plurality of first and second heat exchanger plates provided beside each other for forming a plate package having a surrounding edge side and first plate interspaces for a first medium and second plate interspaces for a second medium. A first heat exchanger plate forms, together with a second heat exchanger plate, a pair of heat exchanger plates which encloses a first plate interspace. The plate package has a plurality of such pairs. Each heat exchanger plate has two portholes which form ports extending through the plate package and communicating with the first plate interspaces. The second plate interspaces are open through the enclosing edge side. Each first heat exchanger plate includes a first bent part that cooperates with a bent part of a second heat exchanger plate in order to ensure that these two heat exchanger plates take a determined position in relation to each other. Each porthole of a first heat exchanger plate cooperates with a corresponding porthole of a second heat exchanger plate in order to ensure that each pair takes a determined position in relation to adjoining pairs.

1 .- 13 . (canceled) 
     
     
         14 . A plate heat exchanger comprising a plurality of heat exchanger plates each extending in parallel to a main extension plane, and being provided beside each other so that they form a plate package having a surrounding edge side and first plate interspaces for a first medium and second plate interspace for a second medium,
 wherein every second heat exchanger plate is formed by a first heat exchanger plate, and the remaining heat exchanger plates are formed by a second heat exchanger plate in such a way that such a first heat exchanger plate, together with such a second heat exchanger plate, form a pair of heat exchanger plates that encloses a first plate interspace, and that the plate package comprises a plurality of such pairs of heat exchanger plates,   wherein each of the heat exchanger plates has at least two portholes that form ports extending through the plate package and communicating with the first plate interspaces,   wherein the heat exchanger plates are configured in such a way that the second plate interspaces are open through the surrounding edge side,   wherein each first such heat exchanger plate comprises at least a first bent part, and each second such heat exchanger plate comprises at least a second bent part, wherein in each pair of heat exchanger plates the first bent part is arranged to cooperate with the second bent part in order to ensure that the two heat exchanger plates in each pair take a determined position in relation to each other, and   wherein each of the portholes of such a first heat exchanger plate is configured in such a way that it cooperates with an opposite porthole of such a second heat exchanger plate in order to ensure that each pair of heat exchanger plates takes a determined position in relation to adjoining pairs of heat exchanger plates.   
     
     
         15 . A plate heat exchanger according to  claim 14 , wherein each first and second heat exchanger plate has a compression-molded pattern, which extends in a pressing direction with regard to the extension plane, and the first bent part extends in a first direction with regard to the extension plane of the first heat exchanger plate and the second bent part extends in a second direction with regard to the extension plane of the second heat exchanger plate, wherein the second direction extends in the same direction as the pressing direction but is opposite to the first direction. 
     
     
         16 . A plate heat exchanger according to  claim 15 , wherein the first direction and the second direction extend transversally to the extension plane. 
     
     
         17 . A plate heat exchanger according to  claim 15 , wherein each second heat exchanger plate is rotated 180° in relation to each first heat exchanger plate in the finished plate package. 
     
     
         18 . A plate heat exchanger according to  claim 15 , wherein the first bent part and the second bent part extend in the same direction in the finished plate package. 
     
     
         19 . A plate heat exchanger according to  claim 14 , wherein each heat exchanger plate extends along a longitudinal center line, which extends through the bent part. 
     
     
         20 . A plate heat exchanger according to  claim 19 , wherein each second heat exchanger plate in the plate package is rotated 180° around the center line of the heat exchanger plate. 
     
     
         21 . A plate heat exchanger according to  claim 14 , wherein the first and second heat exchanger plates are permanently joined to each other in the plate package. 
     
     
         22 . A plate heat exchanger according to  claim 14 , wherein each first heat exchanger plate comprises two first bent parts and each second heat exchanger plate two second bent parts. 
     
     
         23 . A plate heat exchanger according to  claim 22 , wherein the two first bent parts are provided opposite to each other along a respective edge of the first heat exchanger plate and the two second bent parts are provided opposite to each other along a respective edge of the second heat exchanger plate. 
     
     
         24 . A plate heat exchanger according to  claim 14 , wherein each porthole comprises a surrounding port area, wherein the port area around a first porthole of each heat exchanger plate is located at a first level with regard to the extension plane and the port area around a second of said portholes of each heat exchanger plate is located at a second level with regard to the extension plane. 
     
     
         25 . A plate heat exchanger according to  claim 24 , wherein the port area around the first porthole of a first pair of heat exchanger plates is configured in such a way that it is in engagement with the port area around the second porthole of an adjoining second pair of heat exchanger plates. 
     
     
         26 . A plate heat exchanger according to  claim 25 , wherein the port area around the second porthole of the first pair of heat exchanger plates is configured in such a way that it is in engagement with the port area around the first porthole of the second adjoining pair of heat exchanger plates.