Thermostat with adaptive operating cycle

In a thermostat for controlling a temperature modifying apparatus of the fluid transfer type, the temperature modifying apparatus having means for modifying the temperature of the fluid and means for circulating the fluid, the thermostat being operative to generate separate energizing signals for controlling the temperature modifying apparatus and the fluid circulating apparatus, and the thermostat having means for generating electrical signals representative of its ambient temperature, means for adaptively controlling the delay between the time of termination of the energizing signal for the temperature modifying apparatus with respect to which the energizing signal for the fluid circulating apparatus is terminated, comprising:

• means for storing a delay signal operative to control the delay between the termination of the energizing signal for the temperature modifying apparatus and the termination of the energizing signal for the circulating apparatus;
• and
• means for receiving the signal representative of the ambient temperature at the thermostat following the time of termination of the energizing signal for the fluid circulating apparatus and for incrementing the delay signal if the direction of change of the ambient temperature is in the same direction that results from energization of the temperature modifying apparatus for alternatively decrementing the delay signal if the direction of change of the ambient temperature is opposite to that produced by energizing the temperature modifying apparatus.

In a thermostat for controlling a temperature modifying apparatus of the fluid transfer type, the temperature modifying apparatus having means for modifying the temperature of the fluid and means for circulating the fluid, the thermostat being operative to generate separate energizing signals for controlling the temperature modifying apparatus and the fluid circulating apparatus, and the thermostat having means for generating electrical signals representative of its ambient temperature, means for adaptively controlling the delay between the time of initiation of the energizing signal for the temperature modifying apparatus with respect to which the energizing signal for the fluid circulating apparatus is initiated, comprising:

• means for storing a delay signal operative to control a delay between the initiation of the energizing signal for the temperature modifying apparatus and the initiation of the energizing signal for the circulating apparatus;
• and
• means for receiving the signal representative of the ambient temperature at the thermostat following the time of initiation of the energizing signal for the fluid circulating apparatus and for decrementing the delay signal if the direction of change of the ambient temperature is in the same direction that results from energization of the temperature modifying apparatus or alternatively incrementing the delay signal if the direction of change of the ambient temperature is opposite to that produced by energizing the temperature modifying apparatus.