Patent ID: 6892806

Claim:
A heat exchanger for motor vehicles comprising: (a) a plurality of flat tubes through which a fluid cooling medium can flow; (b) elongated vortex generators in the form of indentations pointing inward on at least one flat face of said flat tubes, and (i) wherein the ratio between a height, h, of the vortex generators and a height, H, of the flat tubes is approximately 0.05 to 0.5; (ii) wherein a longitudinal axes of the vortex generators are inclined at angles of approximately 10° to 40° with respect to the tube longitudinal axis; and (iii) wherein vortex generators which are adjacent transversely with respect to the tube longitudinal axis are inclined in opposite directions; and (iv) wherein the ratio of the distance between the vortex generator rows in the direction of the tube longitudinal axis to the length of the vortex generators is about 1 to 10; and (v) wherein the ratio of the distance between the first flat face and the second flat face of the vortex generator rows in the direction of the tube longitudinal axis to the height of the vortex generators is approximately 10 to 30 (c) corrugated fins to which environmental air or other media can be applied operably linked to said flat tubes.