Thermostat control system for an automatic ice maker

Details Thermostat control system for an automatic ice maker Thermostat control system for an automatic ice maker

1975-06-18

1977-01-11

Wayner, William E.

Refrigeration

Automatic control

By congealed removable product condition

62135, 62202, 337331, F25C 110

Patent

active

040020410

ABSTRACT:
An automatic ice maker having a motor starting circuit that is unaffected by barometric pressure changes thus obviating the need for altitude adjustment of the ice maker. A mercury column thermostatic sensor is used to provide control that will be accurate regardless of the ambient or altitude pressure while also having the ability to rapidly reset, thus eliminating the need for a back contact thermostat. The sensor, upon sensing the last ice cube to freeze in the ice tray, opens so that a rectifier SCR will be switched to conducting, shorting out a diode bridge circuit and energizing the ice maker motor after which the basic ice maker circuits lock the motor in its running mode for one cycle of ice harvesting.

REFERENCES:
patent: 3028464 (1962-04-01), Zearfoss, Jr.
patent: 3540227 (1970-11-01), Eyman, Jr. et al.
patent: 3751939 (1973-08-01), Bright

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