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Retrofit device to improve vapor compression cooling system performance by dynamic blower speed modulation

United States Patent

December 8, 2015
View the Complete Patent at the US Patent & Trademark Office
A device and method are provided to improve performance of a vapor compression system using a retrofittable control board to start up the vapor compression system with the evaporator blower initially set to a high speed. A baseline evaporator operating temperature with the evaporator blower operating at the high speed is recorded, and then the device detects if a predetermined acceptable change in evaporator temperature has occurred. The evaporator blower speed is reduced from the initially set high speed as long as there is only a negligible change in the measured evaporator temperature and therefore a negligible difference in the compressor's power consumption so as to obtain a net increase in the Coefficient of Performance.
Roth; Robert Paul (Melbourne, FL), Hahn; David C. (Rockledge, FL), Scaringe; Robert P. (Melbourne, FL)
13/ 538,441
June 29, 2012
GOVERNMENT LICENSE RIGHTS The U.S. Government has paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as may be provided for by the terms of Contract No. DE-SC-000-3289 awarded by the U.S. Department of Energy.