Self-Programming Thermostat System, Method and Computer Program Product

• US 20120165993A1
• Filed: 10/28/2011
• Published: 06/28/2012
• Est. Priority Date: 10/28/2010
• Status: Abandoned Application

• Current Assignee: University of Virginia Patent Foundation (University of Virginia)
• Original Assignee: University of Virginia Patent Foundation (University of Virginia)
• Inventors: Whitehouse, Cameron Dean
• Application Number:
  US13/284,448
• Publication Number:
  US 20120165993A1
• Time in Patent Office: Days
• US Class Current: 700/278
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/46 Improving electric energy efficiency or saving
• CPC Class Codes: F24F 11/52 Indication arrangements, e.g. displays
• CPC Class Codes: F24F 11/56 Remote control
• CPC Class Codes: F24F 11/61 using timers
• CPC Class Codes: F24F 11/64 using pre-stored data
• CPC Class Codes: F24F 2120/10 Occupancy
• CPC Class Codes: G05D 23/1904 variable in time

Abstract

Self-programmable thermostat control system and method that automatically senses, creates and suggests highly energy efficient optimized setback schedules in a controllable and predictable manner for a user in accordance with consistently updated historical occupancy patterns of a heated and/or cooled space. Through the use of this system and method, users will be able to reduce inefficiency from the setback schedules produced by other thermostats and select one of the many energy efficient setback schedules produced by the system through an easy to use display screen built into the self-programmable thermostat. With this unique system and method, the user is able to customize their energy efficiency and comfort level in their cooled and/or heated space by selecting the set-back schedule that fits best with their pocketbook and comfort level all at the turn of a knob.

Claims

1. A self-programming thermostat control system that automatically senses, creates and suggests highly energy efficient and optimized setback schedules for controlling energy consumption within a space in a controllable and predictable manner for a user in accordance with consistently changing historical occupancy patterns of a space, said system comprises:

detecting means for detecting said occupancy rates;

timing means for capturing said time interval data;

frequency means for determining the rate and consistency at which these detecting means detect varying occupancy rates at these different time intervals that correspond with different user-based activity functions;

storage means for aggregating historical occupancy rates generated by the detecting means in conjunction with the timing and frequency means;

programming means for reading, analyzing, and modeling the collected historical occupancy rates from the detecting means at changing times and frequencies using the timing and frequency means to derive occupancy pattern models that are used to generate and suggest a selection of efficient setback schedules that can be optimized by the user for greater energy efficiency and comfort in a space; and

display means that display a selection of optimal setback schedules generated by using the detecting, timing, frequency, and programming means of the system;

that displays information to the user that balances energy usage and comfort; and

that contains a selection means which allows a user to choose from the selection of optimal setback schedules for use in the space.

2. The system of claim 1, wherein said space is a heated and/or cooled space or space that can be heated and/or cooled in the future such as a home, building, dwelling, aircraft, watercraft, train, or automobile.

3. The system of claim 1, wherein said user comprises of an occupant or official that manages the space from within or from an external location.

4. The system of claim 1, further comprising of communicating means that enable the self-programming thermostat control system to be implemented using hardware, software, or a combination thereof to allow for simple control by the user.

5. The system of claim 4, wherein said communicating means is configured to allow for remote control access by the user through main frame, PDA, smart phone, personal computer, lap-top, mobile phone, short message service (SMS), or via email.

6. The system of claim 5, wherein said communicating means is configured to allow for automatic syncing of user'"'"'s personal schedules and appointments available online through an electronic calendar to supplement the occupancy data logged by the detecting means of the system to better generate occupancy patterns within the space.

7. The system of claim 1, wherein said detecting means are one or more detecting means selected from the group consisting of motion detecting means, door opening means, garage opening means, sound detecting means, light detecting means, electric voltage use means, and water usage means.

8. The system of claim 1, wherein said detecting means are used to detect subtle and abrupt changes in occupancy in the space.

9. The system of claim 1, wherein said detecting means are placed throughout different areas of the space.

10. The system of claim 1, wherein said detecting means include the use of sensors.

11. The system of claim 1, wherein said motion detecting means is selected from the group consisting of infrared heat sensors, infrared motion sensors, and ultrasonic sensors.

12. The system of claim 1, wherein said activity functions are one or more activity functions comprising of sleeping, eating, bathing, arriving, working, and exercising.

13. The system of claim 1, wherein said timing means comprises a digital clock and calendar to time stamp and collect data for changes in occupancy detected by the detecting means.

14. The system of claim 1, wherein said time intervals comprises of minute by minute logging of data associated with changes in occupancy rates.

15. The system of claim 1, wherein said rate and consistency at which these detecting means sense varying occupancy rates at these different times is turned into an occupancy record.

16. The system of claim 15, wherein said occupancy record includes occupancy rates for about at least the previous two weeks.

17. The system of claim 1, wherein the programming means of the thermostat analyzes aggregated and stored occupancy records and converts them into occupancy pattern models to be optimized for the production of at least two of said suggested efficient setback schedules for the user.

18. The system of claim 17, wherein said at least two suggested efficient setback schedules are produced by minimizing desired miss time on average by the user, given occupancy statistics over a time period.

19. The system of claim 18, wherein said miss time is time where the space is conditioned or unconditioned when it should not be, causing discomfort and waste to the user.

20. The system of claim 17, wherein said at least two suggested efficient setback schedules are generated along a Pareto optimal time curve.

21. The system of claim 1, wherein the display means comprises of selection means that allows the user to toggle between said at least two suggested efficient setback schedules and view the tradeoffs between energy and comfort for each suggested setback schedule.

22. The system of claim 21, wherein said selection means is a knob.

23. The system of claim 21, wherein said selection means is a slidebar.

24. The system of claim 21, wherein said selection means allow any user to dial into any point on said Pareto Optimal Curve to see said tradeoffs between energy and comfort for different schedules.

25. The system of claim 1, wherein the display interface can be digital or analog.

26. The system of claim 1, wherein the storage means is integral with at least one of said thermostat, a server, or other remote-access storage device that can easily interact with said self-programming thermostat system through its communicating means.

27. A method for a self-programming thermostat that automatically creates optimal setback schedules by detecting varying occupancy statistics of a space to achieve greater energy efficiency and comfort for an occupant, the method comprising:

selecting an initial baseline setback schedule that is defined by occupant;

detecting the occupancy rates of the heated and/or cooled space throughout the cooled and/or heated space over the course of a time interval to generate occupancy patterns, which is defined by activity parameters;

consistently detecting and logging variance in said occupancy rates by the occupant at the said defined activity parameters and labeling it miss time;

using said miss time to calculate an average miss time over the course of said time interval;

creating gradually shrinking setback schedules that gradually minimize said miss time; and

suggesting a selection of at least two setback schedules with the least said average miss time to the user in an easy to use display model interface with different energy and comfort tradeoffs shown.

28. The method of claim 27, further comprising of communicating the suggested selection of setback schedules through servers or other processor to allow for remote control by the user.

29. The method of claim 28, wherein said occupant maybe the user located within the heated and/or cooled space or an external user such as a building manager or a distant user away from the space for a period of time.

30. The method of claim 27, wherein heated and/or cooled space comprises at least one of:

building, dwelling, house, vehicle, aircraft, spacecraft, ship, or any other space that may be heated and/or cooled.

31. The method of claim 27, wherein said initial baseline schedule may be an EnergyStar schedule that automatically turns off the HVAC system at a first designated time and turns it on at a second designated time for the user.

32. The method of claim 27, wherein said initial baseline schedule may be a schedule previously produced by the self-programming thermostat.

33. The method of claim 27, wherein said activity parameters comprise of activities such as when the occupant leaves, arrives, sleeps, eats, or bathes in the heated and/or cooled space.

34. The method of claim 27, wherein detected occupancy rates are gathered through detecting changes in occupancy in the heated and/or cooled space.

35. The method of claim 27, wherein said detecting is provided through the use of sensors.

36. The method of claim 35, wherein said sensors is selected from the group consisting of infrared heat sensors, infrared motion sensors, and ultrasonic sensors.

37. The method of claim 27, wherein said variance comprises of capturing consistently changing occupancy rate data of the occupant over a time interval and storing these changed miss times to better reflect changing occupancy patterns by the occupant at said defined activity parameters.

38. The method of claim 27, wherein said miss time is the time when an occupant may be present during unconditioned time of the space or may not be present during conditioned time of the space.

39. The method of claim 27, wherein said miss time is collected and logged through the use of a digital clock and calendar within the thermostat to time stamp when said miss time occurs.

40. The method of claim 27, wherein said time intervals comprises of minute by minute logging of data associated with changes in occupancy rates.

41. The method of claim 40, wherein said time intervals can be optimized by user for longer or shorter time intervals.

42. The method of claim 27, wherein said occupancy rates is configured to provide an occupancy record.

43. The method of claim 42, wherein said occupancy records include occupancy rates for about at least the previous two weeks.

44. The method of claim 27, further comprising converting said occupancy rates into occupancy pattern models to be optimized for the production of said selection of suggested efficient setback schedules for the occupant.

45. The method of claim 27, wherein said average miss time is defined as a proxy for occupant comfort.

46. The method of claim 27, wherein said gradually shrinking setback schedules that gradually minimize miss time on average are generated through the use of two optimization algorithms.

47. The method of claim 46, wherein said two optimization algorithms include:

a maximization of Unconditioned Time (UCT) algorithm given user'"'"'s desired miss time selection and a minimization of average miss time algorithm.

48. The method of claim 47, wherein said maximization of unconditioned time algorithm starts with the maximum possible setback period and uses a sliding window technique to calculate the minimum value of miss time for all schedules with that setback period.

49. The method of claim 48, wherein the maximization of unconditioned time algorithm is applied to all values of desired miss time from about 0 to about 24 hours at fifteen minute intervals and produces a Pareto Optimal curve of setback schedules that maps the longest duration setback period for every possible miss time.

50. The method of claim 48, wherein said sliding window technique gradually shrinks the size of the setback period and repeats until the desired value of miss time by the user is achieved.

51. The method of claim 50, wherein said desired value of miss time is controlled by selection means that allow a user to toggle between at least two suggested efficient setback schedules on said Pareto Optimal Curve and view the tradeoffs between energy and comfort for each suggested setback schedule.

52. The method of claim 51, wherein selection means may include a miss time knob which allows each user to dial into any point on said Pareto optimal curve.

53. The method of claim 47, wherein said maximization of unconditioned time algorithm produces a schedule that achieves said user'"'"'s desired value of miss time.

54. The method of claim 47, wherein said minimization of average miss time algorithm starts with the schedule produced by the first algorithm and further optimizes it by scanning across the entire accumulated occupancy data set that includes said user variance and generates a schedule that achieves the minimum average value of miss time given the desired miss time selected by user.

55. The method of claim 54, wherein said algorithm optimizes setback schedules to achieve an average miss time aligned with the desired miss time selected by user.

56. A self-programming thermostat control system that automatically creates and suggests highly energy efficient and optimized setback schedules for controlling energy consumption within a space in a controllable and predictable manner intended for a user accordance with consistently changing historical occupancy patterns of a heated and/or cooled space, wherein said system is configured to receive a) occupancy rates associated with different activity functions within the desired heated and/or cooled space and b) captured time intervals when the change of occupancy occurs in the heated and/or cooled space, and wherein said system further comprises:

frequency means for determining the rate and consistency of the received occupancy rates at the captured time intervals that correspond with different user-based activity functions;

storage means for aggregating historical occupancy rates generated by the detecting means in conjunction with the timing and frequency means;

programming means for reading, analyzing, and modeling the collected historical occupancy rates from the detecting means at changing times and frequencies using the timing and frequency means to derive occupancy pattern models that are used to generate and suggest a selection of efficient setback schedules that can be optimized by the user for greater energy efficiency and comfort in a space; and

display means that display a selection of optimal setback schedules generated by using the detecting, timing, frequency, and programming means of the system;

that displays information to the user that balances energy usage and comfort; and

that contains a selection means which allows a user to choose from the selection of optimal setback schedules for use in the space.

57. The system of claim 56, wherein the programming means of the thermostat analyzes aggregated and stored occupancy rates and converts them into occupancy pattern models to be optimized for the production of at least two of said suggested efficient setback schedules for the user.

58. The system of claim 57, wherein said at least two suggested efficient setback schedules are produced by minimizing desired miss time on average by the user, given occupancy statistics over a time period.

59. The system of claim 56, wherein the display means comprises of selection means that allows the user to toggle between said at least two suggested efficient setback schedules and view the tradeoffs between energy and comfort for each suggested setback schedule.

60. A computer program product comprising a non-transitory computer useable medium having a computer program logic for enabling at least one processor in a computer system to automatically create optimal setback schedules to achieve greater energy efficiency and comfort for an occupant, said computer program logic comprising:

receiving a selected initial baseline setback schedule;

receiving detected occupancy rates of the heated and/or cooled space throughout the cooled and/or heated space over the course of a time interval to generate occupancy patterns, which is defined by activity parameters;

receiving detected and logged variance in said occupancy rates by the occupant at the said defined activity parameters and labeling it miss time;

using said miss time to calculate an average miss time over the course of said time interval;

creating gradually shrinking setback schedules that gradually minimize miss time; and

suggesting a selection of at least two setback schedules with the least said average miss time to the user in an easy to use display model interface with different energy and comfort tradeoffs shown.

61. The computer program product of claim 60, wherein said gradually shrinking setback schedules are generated through the use of two optimization algorithms, which include:

a maximization of Unconditioned Time (UCT) algorithm given the user'"'"'s desired miss time selection and a minimization of average time algorithm.

62. The computer program product of claim 61, wherein said maximization of unconditioned time algorithm starts with the maximum possible setback period and uses a sliding window technique to calculate the minimum value of miss time for all schedules with that setback period.

63. The computer program product of claim 62, wherein the maximization of unconditioned time algorithm is applied to all values of desired miss time from about 0 to about 24 hours at about fifteen minute time intervals and produces a Pareto Optimal curve of setback schedules that maps the longest duration setback period for every possible miss time.

64. A self-programming thermostat control system that automatically senses, creates and suggests highly energy efficient and optimized setback schedules for controlling energy consumption within a space in a controllable and predictable manner for a user in accordance with consistently changing historical occupancy patterns of a space, said system comprises:

a detector, said detector detects occupancy rates;

a timer for capturing said time interval data and for determining the rate and consistency at which the detector detects varying occupancy rates at these different time intervals that correspond with different user-based activity functions;

storage for aggregating historical occupancy rates generated by the detector in conjunction with corresponding said time intervals;

a computer processor for reading, analyzing, and modeling the collected historical occupancy rates from the detector at changing times and frequencies using the timer to derive occupancy pattern models that are used to generate and suggest a selection of efficient setback schedules that can be optimized by the user for greater energy efficiency and comfort in a space; and

a display device that displays a selection of optimal setback schedules generated by using the detecting, timing, frequency, and programming means of the system;

that displays information to the user that balances energy usage and comfort, and provides a selection mechanism that allows a user to choose from the selection of optimal setback schedules for use in the space.

65. The system of claim 64, wherein said computer processor analyzes aggregated and stored occupancy rates and converts them into occupancy pattern models to be optimized for the production of at least two of said suggested efficient setback schedules for the user.

66. The system of claim 65, wherein said at least two suggested efficient setback schedules are produced by minimizing desired miss time on average by the user, given occupancy statistics over a time period.

67. The system of claim 65, wherein the display comprises of a selection tool that allows the user to toggle between said at least two suggested efficient setback schedules and view the tradeoffs between energy and comfort for each suggested setback schedule.

68. A self-programming thermostat control system that automatically creates and suggests highly energy efficient and optimized setback schedules for controlling energy consumption within a space in a controllable and predictable manner intended for a user accordance with consistently changing historical occupancy patterns of a heated and/or cooled space, wherein said system is configured to receive a) occupancy rates associated with different activity functions within the desired heated and/or cooled space and b) captured time intervals when the change of occupancy occurs in the heated and/or cooled space, and wherein said system further comprises:

timer for determining the rate and consistency of the received occupancy rates at the captured time intervals that correspond with different user-based activity functions;

storage for aggregating historical occupancy rates;

processor for reading, analyzing, and modeling the collected historical occupancy rates to derive occupancy pattern models that are used to generate and suggest a selection of efficient setback schedules that can be optimized by the user for greater energy efficiency and comfort in a space; and

display unit that displays a selection of optimal setback schedules that displays information to the user that balances energy usage and comfort, and that contains a selection mechanism that allows a user to choose from the selection of optimal setback schedules for use in the space.