Demand Defrost
AssigneeCopeland Cold Chain LP
InventorsNathan Paul BURNS, Abram Andrew YORDE, Emma Renee ALLEN, Gregory Scott MICKELSON, Mohammed MAKBOUL, Francois AUCOIN, Mitchell R. BOLIN
Life of this patent
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Abstract
An exemplary controller is configured to be operable for determining when to trigger a defrost cycle by employing a calculated limit for values at μ−3σ for a lower limit and μ+3σ for an upper limit. Each temperature reading that is above the upper limit or less than the lower limit may be logged or recorded as a count. A defrost cycle may be triggered after a defined number of counts has been logged or recorded.
Claims16
A controller configured to be operable for determining when to trigger a defrost cycle by employing a calculated limit for values at μ−3σ for a lower limit and μ+3σ for an upper limit, wherein:
- each temperature reading that is above the upper limit or less than the lower limit is logged or recorded as a count;
- and
- a defrost cycle is triggered after a defined number of counts has been logged or recorded.
A method of determining when to trigger a defrost cycle comprising:
- employing a calculated limit for values at μ−3σ for a lower limit and μ+3σ for an upper limit;
- logging or recording each temperature reading that is above the upper limit or less than the lower limit as a count;
- and
- triggering a defrost cycle after a defined number of counts has been logged or recorded.
Dependencies are inferred from the claim text.