Patent ID: 7051799
Filing Date: 2006-05-30
Classification: F28D,F28F

Abstract:
1. 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 peripberal 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 or the plate peripheral flanges are engaged; thereby defining a first fluid chamber between the engaged ridges or peripheral flanges, with the fluid ports in one of said pairs of spaced-apart bosses forming an inlet and an outlet to said first flow chamber, and said chamber defining a flow path between said inlet and outlet; the fluid ports in the respective first and second pairs of spaced-apart bosses being in registration; and an expanded metal turbulizer located between the planar central portion of the first plate and the planar central portion of the second plate, the turbulizer including a crimped portion, whereat the expanded metal turbulizer is closed, said crimped portion being located in said flow path to reduce short-circuit flow between said inlet and outlet, wherein the continuous ridge encircles both the first and second pairs of spaced-apart bosses, said continuous ridge forming a complimentary continuous peripheral groove around the plate adjacent to the raised peripheral flange, the turbulizer having crimped end portions located adjacent to the continuous peripheral groove to reduce short-circuit flow therethrough.