Refrigeration – Processes – Congealing flowable material – e.g. – ice making
Patent
1986-12-04
1988-03-29
Wayner, William E.
Refrigeration
Processes
Congealing flowable material, e.g., ice making
62138, 62233, F25C 100
Patent
active
047335394
ABSTRACT:
A method and apparatus for making ice wherein an ice cube maker has a generally upright gridded evaporator, a hot gas defrost for harvest of cubes, a storage bin below the evaporator, a hinged cube and water curtain between the evaporator and the bin, a new and improved control for the freeze cycle, and a new and improved control for the harvest cycle. The freeze cycle control has a temperature sensor, on a backside of the evaporator, circuitry to count down a predetermined time after a predetermined plate temperature has been sensed, the circuit terminates the countdown if the plate temperature exceeds the predetermined temperature and restarts the countdown when the predetermined temperature is again reached, and the circuit switches the refrigeration from freeze to hot gas defrost when the countdown is completed for harvest of the ice cubes; the harvest control has an ice curtain sensor connected to the refrigeration control, and a lever between the ice curtain and the sensor, when the curtain is opened by ice cubes the sensor picks up the lever movement and the control switches the refrigeration from the defrost to the freeze cycle.
REFERENCES:
patent: 2887852 (1959-05-01), Thomas
patent: 3386258 (1968-06-01), Zygiel
patent: 3513662 (1970-05-01), Golber
patent: 3964270 (1976-06-01), Dwyer
patent: 4238930 (1980-12-01), Hogan et al.
Josten Marvin H.
Merrill Terry L.
Schneider Kenneth W.
Utter Robert F.
Kovar Henry C.
Schneider Metal Manufacturing Co.
Wayner William E.
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