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US 4,881,686 AGranted
Temperature recovery display device for an electronic programmable thermostat
AssigneeHunter-Melnor, Inc.
InventorVinay Mehta
Life of this patent
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AssigneeHunter-Melnor, Inc.
InventorVinay Mehta
Estimating the term…
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.
A programmable thermostat which controls an air conditioning system for a predetermined volume of space, said thermostat comprising:
A programmable thermostat which controls an air conditioning system for a predetermined volume of space, said thermostat comprising:
A display device for a programmable thermostat which controls an air conditioning system for a predetermined volume of space, said display device comprising visual indicator means for visually indicating when a temperature recovery system has activated and is controlling said air conditioning system prior to a given program time to bring the ambient temperature of the predetermined volume of space to a predetermined temperature level by said given program time.
A display device for a programmable thermostat which controls an air conditioning system for a predetermined volume of space, said display device comprising visual indicator means for visually indicating when said programmable thermostat has activated and is controlling said air conditioning system so as to bring the ambient temperature of the predetermined volume of space to a predetermined temperature by a predetermined time, said visual indicator means including graphic display means for graphically displaying the rate of the change of the ambient temperature of the predetermined volume of space.
A display device for a programmable thermostat which controls an air conditioning system for a predetermined volume of space, said display device comprising visual indicator means for visually indicating when said programmable thermostat has activated and is controlling said air conditioning system so as to bring the ambient temperature of the predetermined volume of space to a predetermined temperature by a predetermined time, said visual indicator means including graphic display means for graphically displaying the extent to which the ambient temperature has been brought to the predetermined temperature since the activation of said air conditioning system by said programmable thermostat.
Dependencies are inferred from the claim text.