De-icing thermostat for air conditioners
This patent describes an electronic thermostat adapted to be connected to an air-cooling apparatus to control the operative state of the apparatus. The thermostat includes a means for generating a digital electrical signal representative of a desired temperature setpoint and means for generating a digital electrical signal representative of the ambient temperature at the thermostat. The improvement described here comprises: means for generating control signals for the aircooling apparatus in order to inhibit the accumulation of ice on the cooling element of the air-cooling apparatus when the ambient temperature is above the temperature setpoint; means, responsive to the 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; and means for adaptively adjusting the length of at least one of the first or second preselected periods of time as a function of the change in the rate of change of the ambient temperature.
- Assignee:
- Honeywell, Inc., Minneapolis, MN
- Patent Number(s):
- US 4627245
- OSTI ID:
- 7010999
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
AIR CONDITIONERS
AMBIENT TEMPERATURE
COMPRESSORS
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
COOLING SYSTEMS
DEFROSTING
ENERGY SYSTEMS
EQUIPMENT
ICE
SIGNALS
TEMPERATURE CONTROL
THERMOSTATS
TIME DEPENDENCE