Slab completion time delay relay

Refrigeration – Automatic control – By congealed removable product condition

Patent

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Details

62138, F25C 112

Patent

active

039628833

ABSTRACT:
An ice maker control circuit for use with an ice maker of the type including an inclined refrigerated plate associated with means energized during an ice making cycle of operation to cause water to be continually circulated across the inclined plate as refrigerant is directed with respect thereto and wherein ice slabs built up on the plate are periodically released therefrom and directed to a cutting grid for separation into a plurality of cubes of ice; the control circuit including a bin ice accumulation switch responsive to a maximum build up of ice therein to terminate machine operation and an ice slab thickness control switch to selectively control circuit means for terminating the circulation of water over the plate and for initiating a hot gas defrost cycle of operation; the circuit further including a time delay thermal relay responsive to the bin ice accumulation switch sensing a maximum level of bin ice and operative to maintain an ice making cycle of operation until the ice slab reaches a desired thickness and thereafter conditioning a hot gas defrost solenoid to dislodge the slab from the refrigerated plate onto the grid so as to maintain the clarity of the ice slab; the thermal relay including means to maintain the hot gas defrost cycle for a time delay period followed by machine shut off.

REFERENCES:
patent: 2784563 (1957-03-01), Baker
patent: 3859813 (1975-01-01), Canter

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