Patent ID: 6305466
Filing Date: 2001-10-23
Classification: F28D,Y10S

Abstract:
A three circuit plate heat exchanger comprisingat least ten stacked plates (31-40) provided with a pressed pattern defining channels for three different flows (x, y, z) of heat exchanging fluids; whereat least six (31-36) of the said stacked plates (31-40) defining channels are provided with six holes;all said channel defining plates (31-40) are of equal outer dimensions, said holes having identical locations in all plates (31-36);said channel defining plates (31-36) having six holes are interconnected by means comprising brazing, soldering, welding or gluing at ring shaped contact areas (20) adjacent to the holes, as well as at their outer periphery,characterized in that said ring shaped areas (20) of the plates (31-36) adjacent to four of said six holes are of substantially equal outer and inner shapes, the areas (20) adapted to contact a neighboring plate at two of the holes in a plate being displaced away from a plane containing the contact areas around the remaining four holes in the plate through a distance (H) which is about twice a distance (h), wherein said distance (h) is defined by the greatest extent to which the remaining channel defining material in the place has been displaced from said plane.