Optimum start/stop dependent upon both space temperature and outdoor air temperature
First Claim
1. A system for determining the optimum stop time of an temperature control system within a building so that energy can be conserved by shutting down the temperature control system an amount of lead time prior to end of occupancy of said building wherein said amount of lead time is arranged to confine space temperature within a comfort range as said space temperature drifts during said amount of lead time, said system comprising:
- space temperature sensing means for sensing space temperature within said building;
outdoor air temperature sensing means for sensing outdoor air temperature external to the building; and
,controller means connected to said space temperature sensing means, said outdoor air temperature sensing means, and said temperature control system for determining temperature drift rate within said building and for turning off said temperature control system before the end of occupancy of the building by said amount of lead time dependent upon said space temperature drift rate and said outdoor air temperature.
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Accused Products
Abstract
A system for determining the optimum stop time of an air conditioning system within a building so that energy can be conserved by shutting down the temperature control system an amount of lead time prior to end of occupancy of said building wherein said amount of lead time is arranged to confine space temperature within a comfort range as said space temperature drifts during said amount of lead time, said system including a space temperature sensor for sensing space temperature within the building, an outdoor air temperature sensor for sensing outdoor air temperature external to the building, and a controller connected to the space temperature sensor, the outdoor air temperature sensor and the temperature control system for determining temperature drift rate within the building and for turning off the temperature control system before the end of occupancy of the building by an amount of lead time dependent upon the temperature drift and the outdoor air temperature.
26 Citations
22 Claims
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1. A system for determining the optimum stop time of an temperature control system within a building so that energy can be conserved by shutting down the temperature control system an amount of lead time prior to end of occupancy of said building wherein said amount of lead time is arranged to confine space temperature within a comfort range as said space temperature drifts during said amount of lead time, said system comprising:
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space temperature sensing means for sensing space temperature within said building; outdoor air temperature sensing means for sensing outdoor air temperature external to the building; and
,controller means connected to said space temperature sensing means, said outdoor air temperature sensing means, and said temperature control system for determining temperature drift rate within said building and for turning off said temperature control system before the end of occupancy of the building by said amount of lead time dependent upon said space temperature drift rate and said outdoor air temperature. - View Dependent Claims (2, 3)
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4. A system for determining the optimum stop time of an temperature control system within a building so that energy can be conserved by shutting down the temperature control system an amount of lead time prior to end of occupancy of said building wherein said amount of lead time is arranged to confine space temperature within a comfort range as said space temperature drifts during said amount of lead time, said system comprising:
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space temperature sensing means for sensing space temperature within said building; outdoor air sensing means for sensing outdoor air temperature external to the building; storage means for storing a present outdoor air temperature for a present day, a historic outdoor air temperature of a day prior to the present day, and said space temperature; and
,controller means connected to said space temperature sensing means, to said outdoor air temperature sensing means, to said temperature control system, and to said storage means for determining temperature drift rate within said building and for turning off said temperature control system before the end of occupancy of the building by said amount of lead time dependent upon said space temperature drift rate, said present outdoor air and space temperatures and said historic outdoor air temperature. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A system for determining the optimum stop time of a temperature control system within a building so that energy can be conserved by shutting down the temperature control system an amount of lead time prior to end of occupancy of said building wherein said amount of lead time is arranged to confine space temperature within a comfort range as said space temperature drifts during said amount of lead time, said system comprising:
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space temperature sensing means for sensing space temperature within said building; outdoor air temperature sensing means for sensing outdoor air temperature external to the building; storage means for storing present space and outdoor air temperatures and historic space and outdoor air temperatures, said historic space and outdoor air temperatures based upon space and outdoor air temperatures of a day prior to the day represented by said present space and outdoor air temperatures; and
,controller means connected to said space temperature sensing means, said outdoor air temperature sensing means, said temperature control system, and said storage means for determining an historic temperature drift rate within said building for a day prior to a present day and for turning off said temperature control system before the end of occupancy of the building on said present day by said amount of lead time dependent upon said historic drift rate, the present outdoor air and space temperatures and the historic space and outdoor air temperatures. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for determining the optimum start time of an temperature control system within a building so that energy can be conserved by starting the temperature control system an optimum amount of lead time prior to start of occupancy wherein said amount of lead time is arranged to bring said space temperature to within a comfort range by said start of occupancy, said system comprising:
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space temperature sensing means for sensing space temperature within said building; outdoor air temperature sensing means for sensing outdoor air temperature external to the building; and
,controller means connected to said space temperature sensing means, said outdoor air temperature sensing means, and said temperature control system for determining temperature drift rate within said building and for starting the temperature control system an amount of lead time prior to the start of building occupancy wherein said amount of lead time is arranged to bring said space temperature to within a comfort range by said start of occupancy.
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22. A system for determining the optimum stop time of a temperature control system within a building so that energy can be conserved by shutting down the temperature control system an amount of lead time prior to end of occupancy of said building wherein said amount of lead time is arranged to confine space temperature within a comfort range as said space temperature drifts during said amount of lead time, said system comprising:
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space temperature sensing means for sensing space temperature within said building; outdoor air temperature sensing means for sensing outdoor air temperature external to the building; and
,controller means connected to said space temperature sensing means, said outdoor air temperature sensing means, and said temperature control system for determining space temperature drift rate within said building and for turning off said temperature control system before the end of occupancy of the building by said amount of lead time dependent upon said space temperature, said space temperature drift rate and said outdoor air temperature.
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Specification