Patent ID: 7243500
Filing Date: 2007-07-17
Classification: F25B,F25D,F28D

Abstract:
1. A compact, low cost heat exchanger comprising: a double walled cylindrical element for receiving a thermal transfer fluid and including an internal cylindrical chamber and a gap between the walls; a pump for the thermal transfer fluid including a pumping element immersed in the internal cylindrical chamber; a fluid transfer system supplying thermal transfer fluid into the gap between the cylindrical walls; and a tubular system for transporting a temperature regulating fluid comprising a hollow tubular body helically wrapped with a selected spacing between turns of the helix about the inner wall in the gap between the walls of the double walled cylindrical element, and the tubular body contacting both walls of the cylindrical element for circulating the temperature regulating fluid about the periphery of the cylindrical element in heat exchange relation to thermal transfer fluid flowing in the gap within the spacing between turns of the helix.