| 摘要 |
A programmable thermostat for an air conditioning system for a predetermined volume of space is provided which includes a digital memory for storing a plurality of program times and program temperatures corresponding to the program times, a sensor for sensing the ambient temperature within the predetermined volume of space, a timer for generating the current time of day, and a controller for controlling the on/off switching of the air conditioning system in response to (1) a comparison of the current time of day with the program times stored in the digital memory to access the corresponding current control temperature stored in the digital memory and (2) comparison of the current ambient temperature sensed by the sensor with the current control temperature stored in the memory. A temperature recovery system activates and controls the air conditioning system prior to a given program time so as to bring the ambient temperature of the predetermined volume of space to the control temperature corresponding to the given program time by the given program time. The programmable thermostat includes one or more display devices which provide a visual indication when the temperature recovery program has activated and is controlling the air conditioning system. The display device may also include a graphic display for visually indicating the extent to which recovery has been effected.
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