Closed-loop microwave popcorn control

Details Closed-loop microwave popcorn control Closed-loop microwave popcorn control

F - Mech Eng,Light,Heat,Weapons

24

C

349/29, 327/2.51

F24C 7/02 (2006.01) H05B 6/68 (2006.01)

Patent

CA 1331042

ABSTRACT A closed-loop control for sensing the completion of popcorn popping in a microwave oven and automatically shutting down the oven. A sensor is acoustically coupled to the microwave oven cavity and provides an electrical signal to an amplifier and filter. The amplified and filtered signal is processed by a pop detector which includes an integrator and shut-down command generator responsive to a decreasing rate of popping to shut the oven off. The integrator provides a pre-pop timer function to maintain the oven on until popping commences.

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