Three circuit plate heat exchanger
AssigneeSWEP International AB
InventorsSven Andersson, Thomas Dahlberg
Life of this patent
Estimating the term…
Abstract
In a three circuit plate heat exchanger stacked plates (31-36) forming channels for two flows (y, z) of fluid which should exchange heat with a third fluid (x) are each comprising two plate areas (20) surrounding two port forming holes and four plate areas (50) surrounding four port forming holes. The said two plate areas (20) surrounding two of the port holes are displaced through a vertical distance (H) away from the areas (50) surrounding four of the port forming holes. All channel forming plates are provided with a pressed pattern the maximum pressed depth of which is=h=about H/2.
Claims4
A three circuit plate heat exchanger comprising
- at least ten stacked plates (31-40) provided with a pressed pattern defining channels for three different flows (x, y, z) of heat exchanging fluids;
- where
- at 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.
Dependencies are inferred from the claim text.