A PLATE HEAT EXCHANGER FOR THREE HEAT EXCHANGING FLUIDS

摘要

The present invention constitutes a plate heat exchanger for three heat exchanging fluids which heat exchanger comprises at least one core of plates with heat exchanging plates (1-4), at least two end plates (5) and inlets and outlets (6) for the heat exchanging fluids, each one of the heat exchanging plates (1-4) being provided with six port holes (11-16). The plate heat exchanger is among other things characterized in that the port holes (11-16) are pairwise aimed for the flowing through of the respective heat exchanging fluids where the port holes (11-16) in every such pair are situated on both sides of a heat transferring part in such a way that a straight line drawn between the centres of the port holes (11-16) divides the heat transferring part into two alike parts. The invention also refers to a plate heat exchanger for refrigeration applications, which among other things is characterized in that the port holes (17, 18, 20, 21, 23, 23', 24, 24') for each one of the two fluids create at least two inlet channels through the core of plates which, for each one of the fluids, are in fluid communication with each other at a plurality of places along the inlet channels in such a way that the fluid, on its way from the one inlet channel to plate interspaces aimed therefor, is forced to pass through the other inlet channel.