US5192020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intelligent setpoint changeover for a programmable thermostat
Assignee: Honeywell Inc
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Filing: 1991-11-08
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Granted: 1993-03-09
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Expires: 2011-11-08
Abstract
Abstract An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading the comfort level of the area of temperature modification. The apparatus prevents short-cycling of either a heating or a cooling system which can occur due to changes in the setpoint temperature. The apparatus operates by determining the length of time of "on" portion and"off" portion of the duty cycle of the air temperature conditioning plant. It then determines the time until the upcoming cycle of the temperature conditioning plant and either advances or delays the temperature changeover until the beginning of the upcoming "on" period or the upcoming "off" period of the upcoming duty cycle, or the last "on" period or the last "off" period of the last duty cycle of the air temperature conditioning plant.
Inventors
- 👤 Dipak J. Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:15
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; G05D23/1904; F; F24; F24F; F24F11/00; F24F11/30; F24F11/46; F24F11/50; F24F11/61; F24F11/62; F24F11/63; G05D23/1919; F24F2110/00; F24F2110/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
182 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level comprising: a programmable changeover thermostat; an input means for programming said thermostat with changeover temperature settings at selectable time of day periods; a clock means to determine time of day; a timing means for determining the length of time of an "on" portion and an "off" portion of said duty cycle of said air temperature conditioning plant; a comparison means to determine a time until an upcoming temperature conditioning plant cycle; a means to advance or delay said temperature changeover until the beginning of the upcoming "on" period or upcoming "off" period of the upcoming duty cycle or the last "on" period or the last "off" period of the last duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle or less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
Claim 2
Independent Claim
182 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level comprising: a programmable changeover thermostat; an input means for programming said thermostat with changeover temperature settings at selectable time of day periods; a clock means to determine time of day; a timing means for determining the length of time of an "on" portion and an "off" portion of said duty cycle of said air temperature conditioning plant; a comparison means to determine a time until an upcoming temperature conditioning plant cycle; a means to advance or delay said temperature changeover until the beginning of the upcoming "on" period or upcoming "off" period of the upcoming duty cycle or the last "on" period or the last "off" period of the last duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle or less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
Claim 3
Dependent Claim
94 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level of claim 1, wherein said means to advance or delay said temperature changeover advances said temperature changeover by changing said changeover temperature setting to said upcoming changeover temperature setting until the upcoming time of day period for the upcoming changeover temperature setting when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle of said air temperature conditioning plant.
Claim 4
Dependent Claim
103 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level of claim 1, wherein said means to advance or delay said temperature changeover advances said temperature changeover by changing the upcoming pre-programmed temperature changeover setting time of day period to equal said time of day until the time of day equals said actual upcoming pre-programmed temperature changeover setting time of day when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle of said air temperature conditioning plant.
Claim 5
Dependent Claim
112 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level of claim 1, wherein said means to advance or delay said temperature changeover delays said temperature changeover by changing said upcoming changeover temperature setting to said current changeover temperature setting until the time of day equals the current time of day plus the length of time of an "on" portion of said duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle of said air temperature conditioning plant.
Claim 6
Dependent Claim
107 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level of claim 1, wherein said means to advance or delay said temperature changeover delays said temperature changeover by changing said time of day for said upcoming changeover temperature setting to said current time of day plus said length of time of an "on " portion on said duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle of said air temperature conditioning plant.
Claim 7
Independent Claim
93 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level of claim I, wherein said means to advance or delay said temperature changeover advances said temperature changeover by changing said changeover temperature setting to said upcoming changeover temperature setting until the time of day period equals the upcoming changeover time of day period when the time until the upcoming temperature changeover is less than the time of the last "off" period of said air temperature conditioning plant.
Claim 8
Dependent Claim
103 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level of claim 1, wherein said means to advance or delay said temperature changeover advances said temperature changeover by changing the upcoming pre-programmed temperature changeover setting time of day period to equal said time of day until the time of day equals said actual upcoming pre-programmed temperature changeover setting time of day when the time until the upcoming temperature changeover is less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
Claim 9
Dependent Claim
112 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level of claim 1, wherein said means to advance or delay said temperature changeover delays said temperature changeover by changing said upcoming changeover temperature setting to said current changeover temperature setting until the time of day equals the current time of day plus the length of time of an "off" portion of said duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
Claim 10
Dependent Claim
107 words
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading comfort level of claim 1, wherein said means to advance or delay said temperature changeover delays said temperature changeover by changing said time of day for said upcoming changeover temperature setting to said current time of day plus said length of time of an "off " portion on said duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
Claim 11
Independent Claim
169 words
A method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level comprising the steps of: presetting a programmable changeover thermostat with a sequence of changeover temperature and time of day settings for initiation of each changeover temperature; determining the length of time of an "on" portion and an "off" portion of a duty cycle of said air temperature conditioning plant; determining a time until an upcoming temperature conditioning plant cycle; and advancing or delaying said temperature changeover until the beginning of the upcoming "on" period or upcoming "off" period of the upcoming duty cycle or the last "on" period or the last "off" period of the last duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle or less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
Claim 12
Independent Claim
169 words
A method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level comprising the steps of: presetting a programmable changeover thermostat with a sequence of changeover temperature and time of day settings for initiation of each changeover temperature; determining the length of time of an "on" portion and an "off" portion of a duty cycle of said air temperature conditioning plant; determining a time until an upcoming temperature conditioning plant cycle; and advancing or delaying said temperature changeover until the beginning of the upcoming "on" period or upcoming "off" period of the upcoming duty cycle or the last "on" period or the last "off" period of the last duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle or less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
Claim 13
Dependent Claim
89 words
The method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level of claim 10, comprises the step of advancing said temperature changeover by changing said changeover temperature setting to said upcoming changeover temperature setting until the upcoming time of day period for the upcoming changeover temperature setting when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle of said air temperature conditioning plant.
Claim 14
Dependent Claim
99 words
The method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level of claim 10, further comprises the step of advancing said temperature changeover by changing the upcoming pre-programmed temperature changeover setting time of day period to equal said time of day until the time of day equals said actual upcoming pre-programmed temperature changeover setting time of day when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle of said air temperature conditioning plant.
Claim 15
Dependent Claim
108 words
The method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level of claim 10, further comprises the step of delaying said temperature changeover by changing said upcoming changeover temperature setting to said current changeover temperature setting until the time of day equals the current time of day plus the length of time of an "on" portion of said duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle of said air temperature conditioning plant.
Claim 16
Dependent Claim
103 words
The method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level of claim 10, further comprises the step of delaying said temperature changeover by changing said time of day for said upcoming changeover temperature setting to said current time of day plus said length of time of an "on " portion on said duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "on" period duty cycle of said air temperature conditioning plant.
Claim 17
Dependent Claim
87 words
The method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level of claim 10, further comprises the step of advancing said temperature changeover by changing said changeover temperature setting to said upcoming changeover temperature setting until time of day period equals the upcoming changeover time of day period the time until the upcoming temperature changeover is less than the time of the last "off" period of said air temperature conditioning plant.
Claim 18
Dependent Claim
99 words
The method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level of claim 10, further comprises the step of advancing said temperature changeover by changing the upcoming pre-programmed temperature changeover setting time of day period to equal said time of day until the time of day equals said actual upcoming preprogrammed temperature changeover setting time of day when the time until the upcoming temperature changeover is less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
Claim 19
Dependent Claim
108 words
The method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level of claim 10, further comprises the step of delaying said temperature changeover by changing said upcoming changeover temperature setting to said current changeover temperature setting until the time of day equals the current time of day plus the length of time of an "off" portion of said duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
Claim 20
Dependent Claim
103 words
The method to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading occupant comfort level of claim 10, further comprises the step of delaying said temperature changeover by changing said time of day for said upcoming changeover temperature setting to said current time of day plus said length of time of an "off " portion on said duty cycle of said air temperature conditioning plant when the time until the upcoming temperature changeover is less than the time of the last "off" period duty cycle of said air temperature conditioning plant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-08 | 1996-09-07 | 1997-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-08 | 2000-09-07 | 2001-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-08 | 2004-09-07 | 2005-03-09 | $7700.00 | Window Closed / Lapsed |