The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 1987
Filed:
Dec. 27, 1985
Donald E Janke, Benton Township, Berrien County, MI (US);
William J Linstromberg, Lincoln Township, Berrien County, MI (US);
Whirlpool Corporation, Benton Harbor, MI (US);
Abstract
An adaptive defrost control for a refrigeration device alternately operated in cooling and defrosting cycles includes means for detecting the rate of change of temperature of an evaporator of the refrigeration device during a defrosting cycle, means for determining the length of time the rate of change of evaporator temperature remains at substantially zero and means for establishing the duration of a subsequent cooling cycle in dependence upon the determined length of time. The determined length of time is indicative of the magnitude of the frost load that formed on the evaporator and the length of the next cooling cycle is adjusted in accordance therewith so that the magnitude of the frost load built up on the evaporator in subsequent cooling cycles is forced toward a value which increases the efficiency of the refrigeration device.