초록 ▼

An electric thermostat operative to be connected to a furnace or other temperature modifying apparatus to control its state of operation includes means for generating a desired temperature set-point signal and means for measuring ambient temperature at the thermostat. When the ambient temperature fa

An electric thermostat operative to be connected to a furnace or other temperature modifying apparatus to control its state of operation includes means for generating a desired temperature set-point signal and means for measuring ambient temperature at the thermostat. When the ambient temperature falls sufficiently below this set-point, the furnace is energized until the ambient temperature rises to a stored temperature level, also below the set-point. The system then monitors the peak ambient temperature reached during the following temperature overshoot resulting from the inertia of the furnace. The temperature differential between this limiting temperature obtained and the set-point is then added to the stored temperature value if the system did not obtain the set point temperature or substracted from the stored temperature value if the system exceeded the set-point value. The system also stores a second predetermined temperature value below the set point to establish a “dead zone”and similar control is exercised over the temperature at which the energizing signal for the furnace is initiated so that the system adaptively maintains a temperature range exactly limited by the dead zone independent of environmental temperature changes.

대표청구항 ▼

In a thermostat operative to be connected to a temperature modifying apparatus to control the operative state of the apparatus and including means for generating an electrical signal representative of a desired temperature set-point and means for generating an electrical signal representative of the

In a thermostat operative to be connected to a temperature modifying apparatus to control the operative state of the apparatus and including means for generating an electrical signal representative of a desired temperature set-point and means for generating an electrical signal representative of the ambient temperature at the thermostat, the improvement comprising: means for generating control signals for the temperature modifying apparatus operative to control it into a state which causes the ambient temperature to move toward the set point; and means for adaptively modifying the time of termination of each of said control signals as a function of the temperature difference between said set-point and the limit of the ambient temperature attained the previous time the temperature modifying apparatus was controlled to said state.