Skip to Content
Return to Search

FAULT DETECTION AND DIAGNOSIS FOR REFRIGERATOR FROM COMPRESSOR SENSOR

United States Patent Application

*** PATENT GRANTED ***
20130340457
9,513,043
A1
View the Complete Application at the US Patent & Trademark Office
A refrigerator, a sealed refrigerant system, and method are provided where the refrigerator includes at least a refrigerated compartment and a sealed refrigerant system including an evaporator, a compressor, a condenser, a controller, an evaporator fan, and a condenser fan. The method includes monitoring a frequency of the compressor, and identifying a fault condition in the at least one component of the refrigerant sealed system in response to the compressor frequency. The method may further comprise calculating a compressor frequency rate based upon the rate of change of the compressor frequency, wherein a fault in the condenser fan is identified if the compressor frequency rate is positive and exceeds a condenser fan fault threshold rate, and wherein a fault in the evaporator fan is identified if the compressor frequency rate is negative and exceeds an evaporator fan fault threshold rate.
KERES, STEPHEN L. (Watervliet, MI), GOMES, ALBERTO REGIO (St. Joseph, MI), LITCH, ANDREW D. (St. Joseph, MI)
WHIRLPOOL CORPORATION (BENTON HARBOR MI)
13/ 531,707
June 25, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT [0001] This invention was made with government support under Award No. DE-EE0003910, awarded by the U.S. Department of Energy. The government has certain rights in the invention.