Adaptive intelligent circulation control methods and systems
First Claim
Patent Images
1. A method of operating an HVAC system, wherein the HVAC system includes a fan that is operated with at least one fan “
- on”
time period and at least one fan “
off”
time period, the method comprising the steps of;
providing a control signal path from an HVAC thermostat for activating and/or deactivating the fan, wherein the control signal path is not shared by other HVAC thermostats;
providing a random or pseudo random start time delay;
delaying at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random start time delay;
providing a random or pseudo random time period;
modifying the length of at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random time period, resulting in a new fan “
on”
time period length; and
operating the fan using the new fan “
on”
time period length.
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Accused Products
Abstract
Adaptive intelligent circulation control methods and systems are used to help increase the comfort and/or reduce energy usage and equipment wear. In one illustrative embodiment, the circulation and/or ventilation time is adjusted based on one or more environmental conditions inside or outside the building structure. In another illustrative embodiment, the circulation and/or ventilation time may be adjusted based on the current time of day, current time of year, and/or the current schedule period. In another illustrative embodiment, the circulation and/or ventilation time is randomized over time. The start time, end time, and/or length of a circulation and/or ventilation cycle may be randomly set.
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Citations
4 Claims
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1. A method of operating an HVAC system, wherein the HVAC system includes a fan that is operated with at least one fan “
- on”
time period and at least one fan “
off”
time period, the method comprising the steps of;providing a control signal path from an HVAC thermostat for activating and/or deactivating the fan, wherein the control signal path is not shared by other HVAC thermostats; providing a random or pseudo random start time delay; delaying at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random start time delay;providing a random or pseudo random time period; modifying the length of at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random time period, resulting in a new fan “
on”
time period length; andoperating the fan using the new fan “
on”
time period length.
- on”
-
2. A controller for an HVAC system, wherein the HVAC system includes a fan and one or more air modifying devices, the controller comprising:
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means for operating the fan in accordance with a fan duty cycle, wherein the fan duty cycle includes at least one fan “
on”
time period and at least one fan “
off”
time period;means for generating a random or pseudo random fan start time delay; means for delaying at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random fan start time delay;means for activating at least one of the one or more air modifying devices without reference to the random or pseudo random fan start time delay; means for providing a random or pseudo random time period; means for modifying the length of at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random time period, resulting in a new fan “
on”
time period length; andmeans for operating the fan using the new fan “
on”
time period length.
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3. A method of operating an HVAC system, wherein the HVAC system includes a fan that is operated at a duty cycle, wherein the duty cycle includes at least one fan “
- on”
time period and at least one fan “
off”
time period, the method comprising the steps of;providing a random or pseudo random start time delay; and delaying at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random start time delay;providing a random or pseudo random time period; modifying the length of at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random time period, resulting in a new fan “
on”
time period length; andoperating the fan using the new fan “
on”
time period length.
- on”
-
4. A controller for an HVAC system, wherein the HVAC system includes a fan, the controller comprising:
-
means for operating the fan in accordance with a fan duty cycle, wherein the fan duty cycle includes at least one fan “
on”
time period and at least one fan “
off”
time period;means for generating a random or pseudo random start time delay; means for delaying at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random start time delay;means for providing a random or pseudo random time period; means for modifying the length of at least one of the fan “
on”
time periods by an amount that is at least related to the random or pseudo random time period, resulting in a new fan “
on”
time period length; andmeans for operating the fan using the new fan “
on”
time period length.
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Specification
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Current AssigneeAdemco Inc. (Resideo Technologies, Inc.)
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Original AssigneeHoneywell International Inc.
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InventorsSchnell, Robert J., Vick, Brent D., Peterson, Mark W.
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Primary Examiner(s)Jiang; Chen Wen
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Application NumberUS10/753,589Publication NumberTime in Patent Office1,238 DaysField of Search621/78, 621/58, 621/59, 622/30, 361/22, 361/33, 323/282US Class Current62/178CPC Class CodesF24F 11/0001 for ventilation F24F11/30 t...F24F 11/30 for purposes related to the...F24F 11/61 using timersF24F 11/62 characterised by the type o...F24F 11/70 Control systems characteris...F24F 2110/10 TemperatureF24F 2110/12 of the outside airF24F 2110/20 HumidityF24F 2110/22 of the outside airF24F 2110/50 Air quality propertiesF24F 2110/52 of the outside airF24F 2110/70 Carbon dioxideF24F 2120/10 OccupancyG05D 23/1904 variable in timeY02B 30/70 Efficient control or regula...
