초록 ▼

The programmable thermostat includes a sensor for sensing the ambient temperature within the predetermined volume of space, a timer for generating the current time of day, and a memory for storing a plurality of program times, and a heating and a cooling control temperature corresponding to each pro

The programmable thermostat includes a sensor for sensing the ambient temperature within the predetermined volume of space, a timer for generating the current time of day, and a memory for storing a plurality of program times, and a heating and a cooling control temperature corresponding to each program time. The memory also stores a first temperature span associated with the heating control temperatures and a second temperature span associated with the cooling control temperatures. The current ambient temperature is compared to a first temperature above the heating control temperature, a second temperature below the heating control temperature, a third temperature above the cooling control temperature, and a fourth temperature below the cooling control temperature. These comparisons generate a switching control signal for controlling the on/off state of the heating and cooling systems. The first, second, third, and fourth temperatures are fixed by the first and second temperature spans. An alternation controller controls the alternation of operation of the heating system and the cooling system. The alternation controller includes a first adjustor for adjusting the first temperature span to a first adjusted temperature span prior to an alternation from the cooling system to the heating system. A second adjustor adjusts the second temperature span to a second adjusted temperature span prior to the alternation from the heating system to the cooling system.

대표청구항 ▼

A digital, programmable thermostat for an air conditioning system including a heating system and a cooling system which controls the ambient temperature of a predetermined volume of space, said thermostat comprising: memory means for storing a heating and a cooling control temperature, a first tempe

A digital, programmable thermostat for an air conditioning system including a heating system and a cooling system which controls the ambient temperature of a predetermined volume of space, said thermostat comprising: memory means for storing a heating and a cooling control temperature, a first temperature span associated with the heating control temperature, which first temperature span determines a first temperature at which said heating system is switched on and a second temperature at which said heating system is switched off, and a second temperature span associated with the cooling control temperature, which second temperature span determines a third temperature at which said cooling system is switched on and a fourth temperature at which said cooling system is switched off; control means for selectively controlling the on/off state of said heating and cooling systems in response to a comparison of the ambient temperature and said first temperature, said second temperature, said third temperature, and said fourth temperature, to generate a switching control signal; sensor means for sensing the ambient temperature of the predetermined volume of space; and adjusting means for adjusting (1) at least the current third temperature prior to switching on said cooling system in response to the switching control signal after said heating system is switched off at the current second temperature or (2) at least the current first temperature prior to switching on said heating system in response to the switching control signal after said cooling system is switched off at the current fourth temperature.