Patent ID: 7255155
Filing Date: 2007-08-14
Classification: F24H,F28F

Abstract:
1. A heat exchanger apparatus comprising at least one single piece tubular member having a normal radius and a generally circular cross section, said tubular member further comprising a restricting and turbulating structure, said structure comprising at least one opposing pair of obstructions having a generally parabolic dimple shape disposed within said tubular member and wherein the entire obstruction of each pair of obstructions are aligned with respect to each other and project into said tubular member until they contact one another to form a dead flow area between the obstructions through which fluid flow is negligible and a pair of adjacent converging, diverging nozzles separated by the dead flow area each having an aperture through which a fluid may flow and maintain the normal radius of the tubular member within the circular cross section along the entire tubular member.