Patent ID: 6199626
Filing Date: 2001-03-13
Classification: F28D,F28F

Abstract:
A plate type heat exchanger comprising:first and second plates, each plate including a planar central portion, a first pair of spaced-apart bosses extending from one side of the planar central portion, and a second pair of spaced-apart bosses extending from the opposite side of the planar central portion, said bosses each having an inner peripheral edge portion, and an outer peripheral edge portion defining a fluid port; a continuous ridge encircling the inner peripheral edge portions of at least the first pair of bosses and extending from the planar central portion in the same direction and equidistantly with the outer peripheral edge portions of the second pair of bosses;each plate including a raised peripheral flange extending from the planar central portion in the same direction and equidistantly with the outer peripheral edge portions of the first pair of bosses;the first and second plates being juxtaposed so that one of: the continuous ridges are engaged and the plate peripheral flanges are engaged; thereby defining a first fluid chamber between the engaged ridges or peripheral flanges; the fluid ports in the respective first and second pairs of spaced-apart bosses being in registration;a third plate being located in juxtaposition with one of the first and second plates to define a second fluid chamber between the third plate and the central planar portion of the adjacent plate; andeach planar central portion including a barrier formed of a rib and complementary groove, the rib being located between the inner peripheral edge portions of the bosses of one of the pairs of bosses to reduce short-circuit flow therebetween, and the complementary groove also being located between the bosses of said one pair of bosses to promote flow therebetween.