Patent EP0191481A2 successfully refreshed from Google Patents.
EP0191481A2
Expired / Lapsed
EP
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Temperature control system
Assignee: Honeywell Inc
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Filing: 1986-02-13
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Granted: —
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Expires: 2006-02-13
Abstract
Abstract An optimum start system for determining the optimum start time of a temperature control system within a building so that energy can be conserved by operating the temperature control system at reduced energy levels during periods of non-occupancy of the building and by starting the temperature control system an amount of lead time prior to the beginning of occupancy of said building wherein the amount of lead time is selected to bring space temperature within the building within a comfort range by the start of occupancy, the optimum start system including a space temperature sensor (41-45) for sensing space temperature within the building, an outdoor air temperature sensor for sensing outdoor air temperature (47) external to the building, and a controller (31-38) connected to the space temperature sensor, the outdoor air temperature sensor and the temperature control system for determining the lead time as a function of an accuracy factor based upon the accuracy of a prior lead time and as a function of both outdoor air temperature and space temperature.
Inventors
- 👤 William B. Barnard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 11:37
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; G05D23/1904; F; F24; F24F; F24F11/00; F24F11/30; F24F11/46; F24F11/48; F24F11/50; F24F11/56; F24F11/62; F24F11/63; F24F11/70; F24F11/72; F24F11/74; F24F11/76; F24F11/61; F24F2110/00; F24F2110/10; F24F2110/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
177 words
An optimum start system for determining the optimum start time of a temperature control system within a building so that energy can be conserved by operating the temperature control system at reduced energy levels during periods of non-occupancy of the building and by starting the temperature control system an amount of lead time prior to the beginning of occupancy of said building wherein the amount of lead time is selected to bring space temperature within said building, within a comfort range by the start of occupancy, characterized by: space temperature sensing means (41, 42, 43, 44 or 45) for sensing space temperature within said building; outdoor air temperature sensing means (47) for sensing outdoor air temperature external to the building; and, controller means (31-38) connected to said space temperature sensing means, said outdoor air temperature sensing means, and said temperature control system for determining said lead time as a function of a correction factor based upon the accuracy of at least a prior lead time and as a function of both outdoor air temperature and space temperature.
Claim 2
Dependent Claim
177 words
An optimum start system for determining the optimum start time of a temperature control system within a building so that energy can be conserved by operating the temperature control system at reduced energy levels during periods of non-occupancy of the building and by starting the temperature control system an amount of lead time prior to the beginning of occupancy of said building wherein the amount of lead time is selected to bring space temperature within said building, within a comfort range by the start of occupancy, characterized by: space temperature sensing means (41, 42, 43, 44 or 45) for sensing space temperature within said building; outdoor air temperature sensing means (47) for sensing outdoor air temperature external to the building; and, controller means (31-38) connected to said space temperature sensing means, said outdoor air temperature sensing means, and said temperature control system for determining said lead time as a function of a correction factor based upon the accuracy of at least a prior lead time and as a function of both outdoor air temperature and space temperature.
Claim 3
Dependent Claim
32 words
System according to claim 1, characterized in that said controller means includes means (31-38) for determining lead time as a function of the difference between a desired temperature and actual space temperature.
Claim 4
Dependent Claim
53 words
System according to claim 2, characterized in that said desired temperature is a range of temperatures having a high comfort limit and a low comfort limit, the high comfort limit being used as the desired temperature during summer operation and the low comfort limit being used as the desired temperature during winter operation.
Claim 5
Dependent Claim
56 words
System according to claim 2, characterized in that said controller means includes means (31-38) for determining lead time by the following equation: where LT is lead time, CLIM is the desired temperature, SPT is the space temperature, DC is an arbitrary predetermined design condition temperature, OADB is the outdoor temperature, and M is the correction factor.
Claim 6
Dependent Claim
50 words
System according to claim 4, characterized in that said controller means includes means (31-38) for establishing a range of temperatures as the desired temperature, the range having a high limit and a low limit, wherein CLIM is the high limit during summer operation and the low limit during winter operation.
Claim 7
Dependent Claim
31 words
System according to claim 5, characterized in that said controller means includes means (31-38) for determining said correction factor as a weighted average based upon at least a prior correction factor.
Claim 8
Dependent Claim
60 words
System according to claim 6, characterized in that said controller means includes means (31-38) for determining said correction factor according to the following equation: where A represents an accuracy quantity, MC is a quantity proportional to the accuracy of the latest lead time, LT is the latest lead time, and M * is a correction factor from a prior day.
Claim 9
Dependent Claim
31 words
System according to claim 7, characterized in that said controller means includes means (31-38) for determining a weighted correction factor according to the equation: where M is the weighted correction factor.
Claim 10
Dependent Claim
29 words
System according to claim 1, characterized in that said controller means includes means (31-38) for using a predetermined correction factor on a day immediately following a weekend or holiday.
Claim 11
Dependent Claim
33 words
System according to claim 1, characterized in that said controller means comprises means (31-38) for executing a purge function by utilizing outdoor air as a free source of cooling during summer when appropriate.
Claim 12
Dependent Claim
73 words
i1. System according to claim 1, characterized in that said correction factor is derived by averaging the accuracy of the lead time of the current day and a correction factor for at least a prior day, said correction factor of said prior day being given a predetermined weight with regard to the accuracy of the current lead time, and as a function of the temperature sensed by one of said temperature sensing means.
Claim 13
Dependent Claim
87 words
System according to claim 1, characterized in that said lead time is determined according to three functions, a first function which is related to the difference between a desired comfort limit temperature and space temperature, a second function based upon the ratio of two quantities, the first quantity based upon a desired comfort limit temperature and the second quantity being based upon outdoor air temperature, and a third function defined as a correction factor which is based upon the accuracy of at least one prior lead time.
References Cited (Backward Citations)
No citation records indexed.
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