Means for detecting the accumulation of frost in a low temperatu

Details Means for detecting the accumulation of frost in a low temperatu Means for detecting the accumulation of frost in a low temperatu

1982-01-06

1984-01-31

Makay, Albert J.

Refrigeration

Automatic control

By accumulation on freezing surface, e.g., ice

62152, 62155, 62234, F25D 2102, F25D 2106

Patent

active

044282060

ABSTRACT:
A proximity sensor is mounted on a remote controlled moveable base and is used for detecting a layer of frost of a specified thickness when it accumulates on the subfreezing surface of a refrigeration system. The sensor is positioned at a distance from the subfreezing surface which is greater than the specified thickness of the frost layer which is to be detected. At periodic intervals the moveable base is driven by remote control to move the sensor closer to the subfreezing surface by an amount sufficient for the sensor to make contact with the frost layer when it has accumulated to the specified thickness to be detected.

REFERENCES:
patent: 2229181 (1941-01-01), Leilich
patent: 2231653 (1941-02-01), Baxter
patent: 2785259 (1957-03-01), Haydon
patent: 2814704 (1957-11-01), Bald
patent: 3127486 (1964-03-01), Blumenshine
patent: 3894404 (1975-07-01), Stanton
patent: 4151723 (1979-05-01), Gardner

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