Patent ID: 6394179
Filing Date: 2002-05-28
Classification: F28D,F28F,Y10S

Abstract:
A plate heat exchanger for at least two heat exchanging fluids, said heat exchanger being permanently joined and comprising at least one core of plates having a plurality of heat exchanging plates (2) and at least two end plates (3, 4), the heat exchanging plates (2) creating between one another plate interspaces, whereineach one of the heat exchanging plates (2) is provided with at least one vertically extending corrugation within an area bounded by two opposing parallel first and second plates, respectively, said first and second plates being mainly in parallel with all the other heat exchanging plates (2) as well as the end plates (3, 4) of the plate heat exchanger, each one of the heat exchanging plates (2) being provided with at least four port holes (9, 10), said holes being parts of an inlet channel (11) and an outlet channel (12) through the core of plates for each one of the fluids, at least one of the end plates (3, 4) having a plurality of port holes, each one of said port holes communicating with one of the inlet channels (11) or one of the outlet channels (12) and the inlet channels (11) and the outlet channels (12) for a first and a second fluid, respectively, are in fluid communication with a first (13) and a second (14) set of plate interspaces, respectively, and further wherein the heat exchanging plates (2) have outer edges having a similar design to one another and on each other bearing heat exchanging plates (2) in at least each one of the plate interspaces being parts of the said first set of plate interspaces (13) are brazed together in their outer edges, and around at least two port holes (9) and in preferably all of those points upon the heat exchanging plates (2) where the respective corrugations bear on each other, while on each other bearing heat exchanging plates (2) in substantially all of the plate interspaces being part of the said second set of plate interspaces (14) are brazed together in their outer edges and around at least two port holes (10) only.