Method of and system for minimization of condenser-fan cycling for low ambient temperature
AssigneeLennox Industries Inc.
InventorsSiddarth Rajan, John Tran, N., Rakesh Goel, Clay Toombs
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Abstract
A method of controlling a heating, ventilation and air-conditioning (HVAC) system includes measuring an ambient temperature and determining whether the ambient temperature is below a threshold temperature value. Responsive to a determination that the ambient temperature is below the threshold temperature value, measuring a condenser-fan cycle time of the HVAC system and setting a speed of the compressor based on the measured condenser-fan cycle time.
Claims19
A method of controlling a heating, ventilation and air-conditioning (HVAC) system, the method comprising:
- measuring an ambient temperature;
- determining whether the ambient temperature is below a threshold temperature value;
- responsive to a determination that the ambient temperature is below the threshold temperature value, determining whether a condenser-fan cycle time is greater than a first threshold time;
- and
- responsive to a determination that the condenser-fan cycle time is greater than the first threshold time, setting a speed of a compressor to operate at a demand speed.
A heating, ventilation, and air-conditioning (HVAC) system comprising:
- a controller configured to:
- receive an ambient temperature of an area surrounding an outdoor unit of the HVAC system;
- determine whether the ambient temperature is below a threshold temperature value;
- responsive to a determination that the ambient temperature is below the threshold temperature value, determine whether a condenser-fan cycle time is greater than a first threshold time;
- and
- responsive to a determination that the condenser-fan cycle time is greater than the first threshold time, set a speed of a compressor to operate at a demand speed.
Dependencies are inferred from the claim text.