Patent ID: 7690420

Claim:
A plate heat exchanger comprising a plate package, the plate package including a number of first heat exchanger plates and a number of second heat exchanger plates, the plates being permanently joined to each other and arranged beside each other so that a first plate interspace is formed between each pair of adjacent first heat exchanger plates and second heat exchanger plates, and so that a second plate interspace is formed between each pair of adjacent second heat exchanger plates and first heat exchanger plates, wherein the first plate interspaces and the second plate interspaces are separated from each other and provided beside each other in an alternating order in the plate package, wherein substantially each heat exchanger plate has at least a first porthole and a second porthole, the first portholes forming a first inlet channel to the first plate interspaces and the second portholes forming a first outlet channel from the first plate interspaces, wherein the plate package includes a separate space for each of the first plate interspaces, which space is closed to the second plate interspaces, wherein the separate space communicates with the first inlet channel via an inlet nozzle, which forms a throttling with significantly reduced flow area, and with the respective first plate interspace via an outlet nozzle, which forms a throttling with significantly reduced flow area, wherein the separate space has been produced through compression-molding of the heat exchanger plates, and wherein the inlet nozzle and the outlet nozzle are each formed by a respective hole, which extends through each of the second heat exchanger plates.