De-icing thermostat for air conditioners

Details De-icing thermostat for air conditioners De-icing thermostat for air conditioners

1985-02-08

1986-12-09

Tanner, Harry

Refrigeration

Automatic control

Time or program actuator

62234, G05D 2332

Patent

active

046272453

ABSTRACT:
An electronic de-icing thermostat adapted to be connected to an air-cooling apparatus, such as an air conditioner, to control its state of operation. The thermostat includes means for generating a digital electrical signal representative of a desired temperature setpoint, means for measuring the ambient temperature of the thermostat and means for generating control signals for deenergizing the compressor in the air-cooling apparatus for a first preselected period of time whenever the compressor is determined to have run continuously for a second preselected period of time in order to inhibit the accumulation of ice on the cooling element of the air-cooling apparatus. The device preferably includes means for adaptively adjusting the length of the second and/or first preselected periods of time as a function of the change in the rate of change of the ambient temperature measured during the operation of the air-cooling apparatus.

REFERENCES:
patent: 4094166 (1978-06-01), Jerles
patent: 4136730 (1979-01-01), Kinsey
patent: 4356962 (1982-11-01), Levine
patent: 4453590 (1984-06-01), Holliday et al.

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