Patent ID: 6681848
Filing Date: 2004-01-27
Classification: F24F,G05D

Abstract:
A thermostat for providing an automatic changeover from a current mode to a new mode, the current mode and the new mode being alternate ones of a heating mode for controlling a heating system and a cooling mode for controlling a cooling system, the thermostat comprising:a sensor for measuring a sensed room temperature; a processor coupled to the sensor for controlling the thermostat to operate continuously in one of the heating mode and the cooling mode, the processor programmed to define a time period following a completion of a demand for one of heating and cooling, said time period sufficient to allow the sensed room temperature measured by the sensor to stabilize after the completion of the demand; and a memory coupled to the processor for cooperating with the processor to record an evaluation temperature equal to the sensed room temperature measured at an end of said time period, wherein the processor is further programmed to make a determination, at a future time after recording the evaluation temperature, of whether to allow the automatic changeover, based upon a comparison of said evaluation temperature and the sensed room temperature measured at said future time.