Refrigeration – Automatic control – By congealed removable product condition
Patent
1985-01-09
1986-12-16
Wayner, William E.
Refrigeration
Automatic control
By congealed removable product condition
62233, 62353, F25C 100
Patent
active
046286985
ABSTRACT:
A control system for a tray type refrigerator ice maker having a motor driven programmer for controlling ice harvest by means of tray rotation and twist for ejecting cubes to a collector bin. The programmer also drives an arm for bin level sweep, which, if interrupted by the presence of accumulated bin ice, opens a cutout switch in series with the motor. A temperature sensing curie effect magnetic switch is series connected with the bin switch and motor for delaying harvest cycle motor drive until the surrounding tray temperature is sufficiently below freezing to indicate ice presence in the tray. A heater is series connected with the motor and disposed to cause opening of the temperature sensing switch shortly after motor start. A programmer actuated by-pass switch in parallel with the temperature sensing switch is held close to continue motor drive through the remainder of the harvest cycle. The programmer actuates a separate fill valve switch during the terminal portion of the harvest cycle for energizing an electric water flow valve to refill the tray.
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Karlovits Frank K.
Needham Thomas P.
Eaton Corporation
Grace C. H.
Johnston R. A.
Wayner William E.
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