Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1994-01-07
1995-06-06
Ford, John K.
Heat exchange
Movable heating or cooling surface
Rotary drum
62160, 62156, 62277, 318112, F25B 2900
Patent
active
054213991
ABSTRACT:
A control circuit for a cool/heat pump in which two separate motors are utilized, each with a main winding and an auxiliary winding. A single dual rated capacitor is provided in series with both auxiliary windings. A selectively operative switch, which may be in the form of a thermostat, is provided in series between one of the alternating current lines and the windings of one of the motors to selectively terminate power to that motor while maintaining power to both windings of the other motor. The switch is also used to alternately energize an electric heater unit when the motor power is terminated. Such a control circuit avoids a de-icing operation normally required with cool/heat pumps working in a heating mode, when the outdoor temperature is below freezing.
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Aero Met II, brochure, Aerovox Electrical products Group 740 Belleville Ave New Bedford Mass. 02745-6194 (Aug. 1991).
Jackson David M.
Thompson Christopher M.
Ford John K.
Roth Thomas J.
Whirlpool Corporation
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