초록 ▼

An electronic thermostat including a stored program of desired temperatures and predetermined maximum and minimum temperatures. The stored program of desired temperatures is selectable as either a program of heating temperatures or a program of cooling temperatures. When in the heating mode controll

An electronic thermostat including a stored program of desired temperatures and predetermined maximum and minimum temperatures. The stored program of desired temperatures is selectable as either a program of heating temperatures or a program of cooling temperatures. When in the heating mode controlled by a program of desired heating temperatures, the cooling mode is entered and the air conditioner is energized if the actual temperature exceeds a predetermined temperature. The control temperature in this cooling mode has a predetermined relationship to the programmed temperature in the heating mode. Similarly, if the thermostat is in a cooling mode and the actual temperature falls below another predetermined temperature which is lower than the first predetermined temperature, then the thermostat enters the heating mode and energizes the furnace. The control temperature in this case bears a predetermined relationship to the programmed cooling temperature. In a further embodiment, the air conditioner is actuated if the actual temperature exceeds a predetermined maximum temperature regardless of the mode of the thermostat. In a still further embodiment, the heater is actuated when the actual temperature falls below a predetermined minimum temperature regardless of the mode of the thermostat.

대표청구항 ▼

A thermostat for use in a building having a heating means and a cooling means, the thermostat operable in a heating mode to generate an energizing signal for the heating means and operable in a cooling mode to generate an energizing signal for the cooling means, the thermostat comprising: means for

A thermostat for use in a building having a heating means and a cooling means, the thermostat operable in a heating mode to generate an energizing signal for the heating means and operable in a cooling mode to generate an energizing signal for the cooling means, the thermostat comprising: means for measuring the ambient temperature within the building; programming means for selectively storing either a program of temperatures for the building over a repetitive time cycle in a heating mode or a program of temperatures for the building over a repetitive time cycle in a cooling mode; a clock for generating signals representative of the present time; means connected to said means for selectively storing a program of temperatures and said clock for generating a programmed temperature signal for the present time; means connected to said programming means for initially setting a control temperature equal to the programmed temperature and setting a mode to the programmed mode upon storing a program of temperatures; means for comparing the ambient temperature with the control temperature; means operable only in said heating mode for generating an energizing signal for said heating means if said actual temperature is less than said control temperature; means operable only in said heating mode if said actual temperature is greater than a first predetermined temperature for entering said cooling mode and setting said control temperature equal to said programmed temperature if programmed in said cooling mode and for entering said cooling mode and setting said control temperature equal to a first temperature having a predetermined relationship to said programmed temperature if programmed in said heating mode; means operable only in said cooling mode for generating an energizing signal for said cooling means of said actual temperature is greater than said control temperature; and means operable only in said cooling mode if said actual temperature is less than a second predetermined temperature, said second predetermined temperature being less than said first predetermined temperature, for entering said heating mode and setting said control temperature equal to said programmed temperature if programmed in said heating mode and for entering said heating mode and setting said control temperature to a second temperature having a predetermined relationship to said programmed temperature if programmed in said cooling mode.