WO2005070057A2 - Thermostat with heat and/or cool fan delays controlled by thermostat output - Google Patents
Thermostat with heat and/or cool fan delays controlled by thermostat output Download PDFInfo
- Publication number
- WO2005070057A2 WO2005070057A2 PCT/US2005/000367 US2005000367W WO2005070057A2 WO 2005070057 A2 WO2005070057 A2 WO 2005070057A2 US 2005000367 W US2005000367 W US 2005000367W WO 2005070057 A2 WO2005070057 A2 WO 2005070057A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thermostat
- energizing
- signal
- heater
- air
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
Definitions
- This invention relates generally to thermostats and, more particularly, to a thermostat method and apparatus for introducing delays in the energizing and de-energizing of an air circulating fan of a forced air comfort system.
- a forced air comfort system that may include a furnace and/or an air conditioner
- an electrically driven air circulation fan is used to move the conditioned air to the space for which the air being conditioned.
- the air circulating fan is energized and de-energized at the same time that the furnace heater or the air conditioning system compressor is energized or de-energized. This results in the circulation of air that is not properly conditioned or to the non- circulation of air that is properly conditioned.
- Another object of the present invention is the provision in a forced air comfort system for greater comfort and efficiency in older and/or less expensive furnace/air conditioning systems.
- Yet another object of the present invention is the provision in such forced air comfort systems for initiating delays in the turning on and off of the air circulation fan without upgrading the furnace/air conditioning system.
- Another object of the present invention is the provision for a homeowner to easily adjust delay times to either or both of the heating and cooling systems by adjusting a single thermostat to meet the needs of a particular system as installed.
- Still another object of the present invention is the provision in a forced air comfort system for a thermostat which is economical to manufacture and effective and efficient in use.
- a thermostat includes within its internal control features, signal generating means for introducing a delay between the time in which a signal is sent to turn on the heater or compressor of a comfort system and the time in which the associated air circulation fan is turned on or off. In this way, greater comfort and efficiencies are obtained without the need for upgrading the furnace/air conditioner.
- FIG. 1 is a schematic illustration of a furnace and air conditioner installation into which the present invention has been incorporated.
- FIG. 2 is a wiring diagram showing the thermostat as it is connected to the furnace and the air conditioner.
- FIG. 3 is a timing diagram of the various thermostat signals for turning on and off the components of the furnace and air conditioner in accordance with the present invention.
- FIG. 4 is a flow chart showing the function of the thermostat in accordance with the present invention.
- FIG. 1 there is shown a plan view of an enclosure
- the furnace 11 is mounted such that cold air from the enclosure is received by the furnace through cold air return 13 and thereafter hot air from the furnace is supplied to the enclosure 10 through supply ducts 14 and hot/cold air supply duct 16 to the enclosure 10.
- the furnace has a blower 17 for circulating the air from the enclosure through the cold air return 13 to the furnace 11 and through the furnace heat exchangers 18, through supply duct 14 and back to the enclosure through hot/cold air supply duct 16.
- the air conditioner or heat pump 12 is mounted such that the indoor coil 19 is contained within supply duct 14 in communication with the enclosure air being circulated by the furnace blower, and that the outdoor coil 21 is mounted outside the enclosure in communication with the ambient air 22.
- the indoor coil 19 and the outdoor coil 21 are connected through a reversing valve 23 to a compressor 24.
- the outdoor fan 26 is powered by an outdoor fan motor 27 located such that the ambient air is circulated through the outdoor coil 21.
- a control box 28 is arranged to control by way of signals on line 30 from a thermostat 29, the furnace blower motor 15 by way of line 31 , the heater or gas ignition system 20 by way of line 32, the compressor 24 by way of line 33, and the outdoor fan motor 27 by way of line 34, respectively.
- An outdoor temperature sensor 36 can also be provided for sensing the temperature and sending it to the control box 28 by line 37 and then to the thermostat 29 by line 30.
- the thermostat 29, the furnace 11 and the air conditioning system 12 are shown by their respective blocks with the various electrical interconnections being shown between the three units.
- the interconnections of the control board 28 are not shown since the signals to and from the thermostat 28 are designed to communicate directly with the components of the furnace 11 and the air conditioning system 12.
- the W terminal of the thermostat 28 is intended to provide signals to the W terminal of the furnace 11 so as to selectively activate and deactivate the heater or gas ignition system 20.
- the G terminal of the thermostat 29 is intended to communicate with the G terminal of the furnace 11 to selectively activate and deactivate the blower motor 15.
- the thermostat 29 communicates with the air conditioning by way of the respective Y terminals in order to activate and deactivate the compressor 24 as shown.
- the cooled air is circulated, of course, by the blower 17, and thus the blower motor 15 is again activated by way of communication between the respective G terminals as shown.
- the R and C terminals of the respective thermostat 29, furnace 11 and air conditioner 12 are used for various 24 volt input control signals such as are used to operate the reversing valve 23, for example.
- a fan delay is introduced, such that at time Ti, the thermostat 29 provides a signal from its W terminal for the furnace heater to turn on. At time T2, the thermostat 29 provides a signal from its G terminal for the fan 25 to be turned on.
- the on-delay time of T2-T ⁇ is thus provided for the furnace heat exchangers to be heated up prior to the fan being turned on such that cold air is not caused to be circulated into the enclosure 10, but rather, the fan comes on only after the furnace heat exchangers have been heated up to a satisfactory temperature.
- the furnace is then turned off.
- a similar delay is provided at this time in order to allow the fan to continue to operate after the furnace heater 18 has been shut off in order to obtain the benefit of the residual heat in the heat exchangers. That is, the heater is turned off at time T3 and the blower motor 15 is turned off at a later time, T .
- the off delay time of T4- T3 allows for the economical distribution of heat within the heat exchanger that might otherwise be lost.
- the air conditioner compressor 24 is activated and deactivated by signals from the Y terminal of the thermostat 29 at times T 5 and T 7 as shown.
- the signals to the fan motor 15, as received from terminal G of the thermostat 29 cause the fan to turn on at time T 6 and turn off at time T 8 to provide a similar on-delay of time T 6 -T 5 and an off-delay of time T 8 -T 7 .
- the on- delay allows for the air conditioning system to be operational for a sufficient time such that when the blower motor 15 comes on, it is cooled air rather then hot air that is circulated.
- the off-delay allows for the continued circulation of the residual cool air in the system after the air conditioner is turned off at time T 7 .
- FIG. 4 a flow chart of the present system is shown during the heating operation wherein a demand signal is generated at step 38 as determined by the difference between the said point of the thermostat and the actual temperature as indicated by the thermostat. If the demand is greater than the specified offset as established by the operator and set into the thermostat, then the heat is turned on as shown in steps 39 and 41.
- step 42 If the on-delay timer is set in step 42 as discussed hereinabove, then the system will wait for the on-delay time, after which is will turn on the fan in step
- step 44 the heater will be turned off at step 46. Again, if the off-delay timer is set in step 47, then the system will wait until the off-delay time has expired, after which the fan will be turned at step 48.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006549398A JP2007518057A (en) | 2004-01-08 | 2005-01-07 | Thermostat with heating and / or cooling fan delay controlled by thermostat output |
EP05705146A EP1733171A2 (en) | 2004-01-08 | 2005-01-07 | Thermostat with heat and/or cool fan delays controlled by thermostat output |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/753,582 US20050150651A1 (en) | 2004-01-08 | 2004-01-08 | Thermostat with heat and/or cool fan delays controlled by thermostat output |
US10/753,582 | 2004-01-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005070057A2 true WO2005070057A2 (en) | 2005-08-04 |
WO2005070057A3 WO2005070057A3 (en) | 2006-12-21 |
Family
ID=34739220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/000367 WO2005070057A2 (en) | 2004-01-08 | 2005-01-07 | Thermostat with heat and/or cool fan delays controlled by thermostat output |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050150651A1 (en) |
EP (1) | EP1733171A2 (en) |
JP (1) | JP2007518057A (en) |
WO (1) | WO2005070057A2 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9797405B1 (en) | 2012-03-22 | 2017-10-24 | Robert J. Mowris | Method for efficient fan control for electric or gas furnaces and heat pumps in heating mode |
US10281938B2 (en) | 2010-04-14 | 2019-05-07 | Robert J. Mowris | Method for a variable differential variable delay thermostat |
US9995493B2 (en) | 2010-04-14 | 2018-06-12 | Robert J. Mowris | Efficient fan controller |
US9671125B2 (en) * | 2010-04-14 | 2017-06-06 | Robert J. Mowris | Fan controller |
CN101881542A (en) * | 2010-07-15 | 2010-11-10 | 青岛澳柯玛股份有限公司 | Energy-saving air-cooled refrigerator and energy-saving control method thereof |
US20120017611A1 (en) * | 2010-07-20 | 2012-01-26 | Coffel James A | Load management aware fan control |
US9933176B2 (en) | 2014-01-24 | 2018-04-03 | Trane International Inc. | Latent capacity adjustment |
US10823185B2 (en) | 2015-12-18 | 2020-11-03 | Carrier Corporation | Motor interface assembly and a method of using the same |
US20170296378A1 (en) * | 2016-04-15 | 2017-10-19 | Joseph H. Schaefer | Therapeutic Room Thermostat |
US11187425B2 (en) * | 2016-05-02 | 2021-11-30 | Robert J. Mowris | Thermostat variable fan-off delay |
US10712036B2 (en) | 2017-06-05 | 2020-07-14 | Robert J. Mowris | Fault detection diagnostic variable differential variable delay thermostat |
US10295212B2 (en) | 2016-08-04 | 2019-05-21 | Eaton Intelligent Power Limited | Load control system and method for regulating power supply to a thermostat |
CN112283867B (en) * | 2020-10-16 | 2021-11-09 | 海信(山东)空调有限公司 | Air conditioner and upgrading control method |
Citations (15)
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US4094166A (en) * | 1977-03-23 | 1978-06-13 | Electro-Thermal Corporation | Air conditioning control system |
US4136730A (en) * | 1977-07-19 | 1979-01-30 | Kinsey Bernard B | Heating and cooling efficiency control |
US4240404A (en) * | 1979-03-29 | 1980-12-23 | Antonino Franchina | Heat pump having a timer activated furnace |
US4369916A (en) * | 1980-11-03 | 1983-01-25 | Abbey Dean M | Energy saving override blower control for forced air systems |
US4453590A (en) * | 1982-07-12 | 1984-06-12 | Sun West Solar Systems, Inc. | Duty cycle controller |
US4667874A (en) * | 1985-07-23 | 1987-05-26 | Harold R. Johnson | Energy saving furnace controller |
US4684060A (en) * | 1986-05-23 | 1987-08-04 | Honeywell Inc. | Furnace fan control |
US4773587A (en) * | 1986-08-28 | 1988-09-27 | Lipman Wilfred E | Heating and air conditioning fan sensor control |
US4842044A (en) * | 1987-12-28 | 1989-06-27 | Haven Energy, Ltd. | Furnace control system |
US4860552A (en) * | 1988-12-23 | 1989-08-29 | Honeywell, Inc. | Heat pump fan control |
US4907737A (en) * | 1989-03-30 | 1990-03-13 | R. E. Phelon Company, Inc. | Electronic control system for a gas-fired/hot air furnace with induced draft blower |
US4941325A (en) * | 1989-09-06 | 1990-07-17 | Nuding Douglas J | Energy efficient electronic control system for air-conditioning and heat pump systems |
US5582233A (en) * | 1995-02-22 | 1996-12-10 | Noto; Paul V. | Air circulation enhancement system |
US5743100A (en) * | 1996-10-04 | 1998-04-28 | American Standard Inc. | Method for controlling an air conditioning system for optimum humidity control |
US5918474A (en) * | 1996-07-30 | 1999-07-06 | Whirlpool Corporation | Fan motor on/off control system for a refrigeration appliance |
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US3292387A (en) * | 1965-03-30 | 1966-12-20 | Gen Electric | Air conditioning equipment including time delay control circuitry |
US4449375A (en) * | 1982-03-29 | 1984-05-22 | Carrier Corporation | Method and apparatus for controlling the operation of an indoor fan associated with an air conditioning unit |
US4502625A (en) * | 1983-08-31 | 1985-03-05 | Honeywell Inc. | Furnace control apparatus having a circulator failure detection circuit for a downflow furnace |
US5433377A (en) * | 1994-01-26 | 1995-07-18 | Carrier Corporation | Interlock and forced air furnace and HRV |
US5765636A (en) * | 1996-07-19 | 1998-06-16 | Honeywell Inc. | Air circulation controller with short-cycle prevention capability |
US6070660A (en) * | 1997-02-18 | 2000-06-06 | Hoffman Controls Corp. | Variable speed fan motor control for forced air heating/cooling system |
KR100248760B1 (en) * | 1997-06-27 | 2000-04-01 | 윤종용 | Heating control method for air conditioner |
US5881806A (en) * | 1997-08-18 | 1999-03-16 | University Of Central Florida | Air distribution fan and outside air damper recycling control |
US6220043B1 (en) * | 1998-07-23 | 2001-04-24 | Texas Instruments Incorporated | Apparatus and method for control of a heat pump system |
US6119950A (en) * | 1998-08-21 | 2000-09-19 | Albanello; Frank A. | Thermostat with load relay cycling feature |
US6318639B1 (en) * | 1999-10-15 | 2001-11-20 | Emerson Electric Co. | Thermostat with temporary fan on function |
US6464000B1 (en) * | 2000-09-29 | 2002-10-15 | Atwood Mobile Products | Microprocessor controlled two stage furnace |
-
2004
- 2004-01-08 US US10/753,582 patent/US20050150651A1/en not_active Abandoned
-
2005
- 2005-01-07 EP EP05705146A patent/EP1733171A2/en not_active Withdrawn
- 2005-01-07 JP JP2006549398A patent/JP2007518057A/en active Pending
- 2005-01-07 WO PCT/US2005/000367 patent/WO2005070057A2/en active Application Filing
Patent Citations (15)
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US4094166A (en) * | 1977-03-23 | 1978-06-13 | Electro-Thermal Corporation | Air conditioning control system |
US4136730A (en) * | 1977-07-19 | 1979-01-30 | Kinsey Bernard B | Heating and cooling efficiency control |
US4240404A (en) * | 1979-03-29 | 1980-12-23 | Antonino Franchina | Heat pump having a timer activated furnace |
US4369916A (en) * | 1980-11-03 | 1983-01-25 | Abbey Dean M | Energy saving override blower control for forced air systems |
US4453590A (en) * | 1982-07-12 | 1984-06-12 | Sun West Solar Systems, Inc. | Duty cycle controller |
US4667874A (en) * | 1985-07-23 | 1987-05-26 | Harold R. Johnson | Energy saving furnace controller |
US4684060A (en) * | 1986-05-23 | 1987-08-04 | Honeywell Inc. | Furnace fan control |
US4773587A (en) * | 1986-08-28 | 1988-09-27 | Lipman Wilfred E | Heating and air conditioning fan sensor control |
US4842044A (en) * | 1987-12-28 | 1989-06-27 | Haven Energy, Ltd. | Furnace control system |
US4860552A (en) * | 1988-12-23 | 1989-08-29 | Honeywell, Inc. | Heat pump fan control |
US4907737A (en) * | 1989-03-30 | 1990-03-13 | R. E. Phelon Company, Inc. | Electronic control system for a gas-fired/hot air furnace with induced draft blower |
US4941325A (en) * | 1989-09-06 | 1990-07-17 | Nuding Douglas J | Energy efficient electronic control system for air-conditioning and heat pump systems |
US5582233A (en) * | 1995-02-22 | 1996-12-10 | Noto; Paul V. | Air circulation enhancement system |
US5918474A (en) * | 1996-07-30 | 1999-07-06 | Whirlpool Corporation | Fan motor on/off control system for a refrigeration appliance |
US5743100A (en) * | 1996-10-04 | 1998-04-28 | American Standard Inc. | Method for controlling an air conditioning system for optimum humidity control |
Also Published As
Publication number | Publication date |
---|---|
EP1733171A2 (en) | 2006-12-20 |
WO2005070057A3 (en) | 2006-12-21 |
JP2007518057A (en) | 2007-07-05 |
US20050150651A1 (en) | 2005-07-14 |
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