US20050150651A1 - 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
- US20050150651A1 US20050150651A1 US10/753,582 US75358204A US2005150651A1 US 20050150651 A1 US20050150651 A1 US 20050150651A1 US 75358204 A US75358204 A US 75358204A US 2005150651 A1 US2005150651 A1 US 2005150651A1
- Authority
- US
- United States
- Prior art keywords
- thermostat
- energizing
- signal
- heater
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
- Central Heating Systems (AREA)
Abstract
A thermostat includes within its circuitry a delay signal generator for delaying the activation and deactivation of an air circulation fan for a predetermined time period after which a heater or compressor is activated or deactivated.
Description
- 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.
- In 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. In older furnaces and air conditioning systems, and in lower end systems being manufactured today, 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. That is, in the case of a furnace, non-heated or inadequately heated air is circulated at start up, and when the furnace shuts down, the air that has been heated is not circulated, thereby causing inefficiencies. Similarly, for an air conditioning system, warm unconditioned air is circulated at the beginning of a cycle, and cool conditioned air is not circulated at the end of the cycle.
- In high end furnaces and air conditioners of today, it is common to include control features within the system control board to introduce delays in the turning on and off of the circulating fan so as to overcome the problems discussed hereinabove. However, these features are not available in older furnaces/air conditioners or low end furnaces/air conditioners. Accordingly, in order to obtain these features it is presently necessary to purchase a new system.
- Further, even in those systems where the delay functions can be included in the system control apparatus, the delays will be set according to generalized time periods which may not be appropriate for the particular installation and would not be adjustable to other times except possibly by a service person who would need to make the individual changes in each of the cooling and heating systems.
- It is therefore an object of the present invention to provide an improved forced air comfort system control apparatus and method.
- 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.
- These objects and other features and advantages become more readily apparent upon reference to the following descriptions when taken in conjunction with the appended drawings.
- Briefly, in accordance with one aspect of the invention, 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.
- In the drawings as hereinafter described, a preferred embodiment is depicted; however various other modifications and alternate constructions can be made thereto without departing from the true sprit and scope of the invention.
-
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. - Referring now to
FIG. 1 , there is shown a plan view of anenclosure 10 with an installedfurnace 11 and air conditioner orheat pump 12. Thefurnace 11 is mounted such that cold air from the enclosure is received by the furnace throughcold air return 13 and thereafter hot air from the furnace is supplied to theenclosure 10 throughsupply ducts 14 and hot/coldair supply duct 16 to theenclosure 10. The furnace has ablower 17 for circulating the air from the enclosure through the cold air return 13 to thefurnace 11 and through thefurnace heat exchangers 18, throughsupply duct 14 and back to the enclosure through hot/coldair supply duct 16. - The air conditioner or
heat pump 12 is mounted such that theindoor coil 19 is contained withinsupply duct 14 in communication with the enclosure air being circulated by the furnace blower, and that theoutdoor coil 21 is mounted outside the enclosure in communication with theambient air 22. Theindoor coil 19 and theoutdoor coil 21 are connected through a reversingvalve 23 to acompressor 24. Theoutdoor fan 26 is powered by anoutdoor fan motor 27 located such that the ambient air is circulated through theoutdoor coil 21. - A
control box 28 is arranged to control by way of signals online 30 from athermostat 29, thefurnace blower motor 15 by way ofline 31, the heater orgas ignition system 20 by way ofline 32, thecompressor 24 by way ofline 33, and theoutdoor fan motor 27 by way ofline 34, respectively. Anoutdoor temperature sensor 36 can also be provided for sensing the temperature and sending it to thecontrol box 28 byline 37 and then to thethermostat 29 byline 30. - Referring now to
FIG. 2 , thethermostat 29, thefurnace 11 and theair conditioning system 12 are shown by their respective blocks with the various electrical interconnections being shown between the three units. For simplicity, the interconnections of thecontrol board 28 are not shown since the signals to and from thethermostat 28 are designed to communicate directly with the components of thefurnace 11 and theair conditioning system 12. - As will be seen, the W terminal of the
thermostat 28 is intended to provide signals to the W terminal of thefurnace 11 so as to selectively activate and deactivate the heater orgas ignition system 20. Similarly, the G terminal of thethermostat 29 is intended to communicate with the G terminal of thefurnace 11 to selectively activate and deactivate theblower motor 15. - When the system is operating in the air conditioning or heat pump mode, the
thermostat 29 communicates with the air conditioning by way of the respective Y terminals in order to activate and deactivate thecompressor 24 as shown. The cooled air is circulated, of course, by theblower 17, and thus theblower 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 andair conditioner 12 are used for various 24 volt input control signals such as are used to operate thereversing valve 23, for example. - Referring now to
FIG. 3 , the various delay features of the signals from thethermostat 29 are shown. - As will be seen, for normal operation of the thermostat, the signals for turning on and off the heater and the fan in the case heating operation, and for turning on and off the air conditioner and fan in the case of cooling, both occur at the same time.
- With the present invention, however, a fan delay is introduced, such that at time T1, the
thermostat 29 provides a signal from its W terminal for the furnace heater to turn on. At time T2, thethermostat 29 provides a signal from its G terminal for the fan 25 to be turned on. The on-delay time of T2-T1 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 theenclosure 10, but rather, the fan comes on only after the furnace heat exchangers have been heated up to a satisfactory temperature. - When the thermostat receives an indication that the temperature of the
enclosure 10 has been heated to a predetermined level, 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 thefurnace 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 theblower motor 15 is turned off at a later time, T4. The off delay time of T4-T3 allows for the economical distribution of heat within the heat exchanger that might otherwise be lost. - In a similar manner, the
air conditioner compressor 24 is activated and deactivated by signals from the Y terminal of thethermostat 29 at times T5 and T7 as shown. Again, the signals to thefan motor 15, as received from terminal G of thethermostat 29 cause the fan to turn on at time T6 and turn off at time T8 to provide a similar on-delay of time T6-T5 and an off-delay of time T8-T7. The on-delay allows for the air conditioning system to be operational for a sufficient time such that when theblower motor 15 comes on, it is cooled air rather then hot air that is circulated. Similarly, 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 T7. - Referring now to
FIG. 4 , a flow chart of the present system is shown during the heating operation wherein a demand signal is generated atstep 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 off set as established by the operator and set into the thermostat, then the heat is turned on as shown insteps - 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 instep 43. - When the demand is finally determined to be zero in
step 44, the heater will be turned off atstep 46. Again, if the off-delay timer is set instep 47, then the system will wait until the off-delay time has expired, after which the fan will be turned atstep 48. - In the case of cooling operation, the on and off delay times will operate in substantially the same way as described hereinabove.
Claims (8)
1. A thermostat for energizing and de-energizing a forced air comfort system having a furnace and/or air conditioning system with a respective heater or compressor and an air circulating fan comprising:
means within said thermostat for receiving a demand signal and for responsively generating a first signal for energizing said heater or compressor;
means within said thermostat for generating a delay signal of a predetermined time period; and
means within said thermostat for generating a second signal for energizing said circulation fan upon the passing of said predetermined time period following the energizing of said heater or compressor.
2. A thermostat as set forth in claim 1 and further comprising:
means within said thermostat for generating a third signal for de-energizing said heater or compressor;
means within said thermostat for generating a off-delay signal of a predetermined time period; and
means within said thermostat for generating a fourth signal for de-energizing said circulation fan upon the passing of said predetermined time-off period following the de-energizing of said heater or compressor.
3. A method of operating a forced air comfort system having a furnace and/or air conditioner system with a respective heater or compressor and an air circulation fan all of which are turned on and off by signals from the thermostat, comprising the steps of:
sensing a need for heating or cooling and sending a corresponding demand signal to said thermostat;
responsively generating within said thermostat a first energizing signal for energizing said heater or compressor;
in response to said energizing signal, generating within said thermostat an energizing delay signal of a desired time-on period;
waiting for said desired time-on period following the energization of said heater or compressor; and
generating within said thermostat a second energizing signal for responsively energizing said air circulation fan.
4. A method as set forth in claim 3 and including the further steps of generating within said thermostat a first de-energizing signal for de-energizing said heater or compressor;
in response to said de-energizing signal, generating within said thermostat a de-energizing delay signal of a desired time-off period;
waiting for said desired time-off period following the de-energizing of said heater or compressor; and
generating within said thermostat a second de-energizing signal for responsively de-energizing said air circulation fan.
5. A thermostat for energizing and de-energizing a forced air comfort system having a furnace and/or air conditioning system with a respective heater or compressor and an air circulating fan comprising:
a first signal generator for generating a delay signal which causes the air circulation fan to be activated only after a predetermined time period following the energization of the heater or compressor.
6. A thermostat as set forth in claim 5 including a second signal generator for generating an off delay signal which causes the air circulation fan to be deactivated only after a predetermined time period following the de-energization of the heater of compressor.
7. A thermostat as set forth in claim 1 wherein said forced air comfort system is a furnace and said circulation fan is turned on a predetermined time after said heater is energized.
8. A thermostat as set forth in claim 1 wherein said forced air comfort system is an air conditioner and said circulation fan is turned on a predetermined time after said compression is energized.
Priority Applications (4)
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 |
PCT/US2005/000367 WO2005070057A2 (en) | 2004-01-08 | 2005-01-07 | Thermostat with heat and/or cool fan delays controlled by thermostat output |
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 (1)
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 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050150651A1 true US20050150651A1 (en) | 2005-07-14 |
Family
ID=34739220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/753,582 Abandoned US20050150651A1 (en) | 2004-01-08 | 2004-01-08 | 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) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US9671125B2 (en) * | 2010-04-14 | 2017-06-06 | Robert J. Mowris | Fan controller |
US20170296378A1 (en) * | 2016-04-15 | 2017-10-19 | Joseph H. Schaefer | Therapeutic Room Thermostat |
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 |
WO2018026986A1 (en) * | 2016-08-04 | 2018-02-08 | Cooper Technologies Company | Load control system and method for regulating power supply to a thermostat |
US9933176B2 (en) | 2014-01-24 | 2018-04-03 | Trane International Inc. | Latent capacity adjustment |
US9995493B2 (en) | 2010-04-14 | 2018-06-12 | Robert J. Mowris | Efficient fan controller |
US10281938B2 (en) | 2010-04-14 | 2019-05-07 | Robert J. Mowris | Method for a variable differential variable delay thermostat |
US10712036B2 (en) | 2017-06-05 | 2020-07-14 | Robert J. Mowris | Fault detection diagnostic variable differential variable delay thermostat |
US10823185B2 (en) | 2015-12-18 | 2020-11-03 | Carrier Corporation | Motor interface assembly and a method of using the same |
CN112283867A (en) * | 2020-10-16 | 2021-01-29 | 海信(山东)空调有限公司 | Air conditioner and upgrading control method |
US11187425B2 (en) * | 2016-05-02 | 2021-11-30 | Robert J. Mowris | Thermostat variable fan-off delay |
Citations (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3292387A (en) * | 1965-03-30 | 1966-12-20 | Gen Electric | Air conditioning equipment including time delay control circuitry |
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 |
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 |
US4453590A (en) * | 1982-07-12 | 1984-06-12 | Sun West Solar Systems, Inc. | Duty cycle controller |
US4502625A (en) * | 1983-08-31 | 1985-03-05 | Honeywell Inc. | Furnace control apparatus having a circulator failure detection circuit for a downflow furnace |
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 |
US5433377A (en) * | 1994-01-26 | 1995-07-18 | Carrier Corporation | Interlock and forced air furnace and HRV |
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 |
US5765636A (en) * | 1996-07-19 | 1998-06-16 | Honeywell Inc. | Air circulation controller with short-cycle prevention capability |
US5867997A (en) * | 1997-06-27 | 1999-02-09 | Samsung Electronics Co., Ltd. | Heating control apparatus of air conditioner and method thereof |
US5881806A (en) * | 1997-08-18 | 1999-03-16 | University Of Central Florida | Air distribution fan and outside air damper recycling control |
US5918474A (en) * | 1996-07-30 | 1999-07-06 | Whirlpool Corporation | Fan motor on/off control system for a refrigeration appliance |
US6070660A (en) * | 1997-02-18 | 2000-06-06 | Hoffman Controls Corp. | Variable speed fan motor control for forced air heating/cooling system |
US6119950A (en) * | 1998-08-21 | 2000-09-19 | Albanello; Frank A. | Thermostat with load relay cycling feature |
US6220043B1 (en) * | 1998-07-23 | 2001-04-24 | Texas Instruments Incorporated | Apparatus and method for control of a heat pump system |
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 WO PCT/US2005/000367 patent/WO2005070057A2/en active Application Filing
- 2005-01-07 JP JP2006549398A patent/JP2007518057A/en active Pending
Patent Citations (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3292387A (en) * | 1965-03-30 | 1966-12-20 | Gen Electric | Air conditioning equipment including time delay control circuitry |
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 |
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 |
US4453590A (en) * | 1982-07-12 | 1984-06-12 | Sun West Solar Systems, Inc. | Duty cycle controller |
US4502625A (en) * | 1983-08-31 | 1985-03-05 | Honeywell Inc. | Furnace control apparatus having a circulator failure detection circuit for a downflow furnace |
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 |
US5433377A (en) * | 1994-01-26 | 1995-07-18 | Carrier Corporation | Interlock and forced air furnace and HRV |
US5582233A (en) * | 1995-02-22 | 1996-12-10 | Noto; Paul V. | Air circulation enhancement system |
US5765636A (en) * | 1996-07-19 | 1998-06-16 | Honeywell Inc. | Air circulation controller with short-cycle prevention capability |
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 |
US6070660A (en) * | 1997-02-18 | 2000-06-06 | Hoffman Controls Corp. | Variable speed fan motor control for forced air heating/cooling system |
US6684944B1 (en) * | 1997-02-18 | 2004-02-03 | Hoffman Controls Corp. | Variable speed fan motor control for forced air heating/cooling system |
US5867997A (en) * | 1997-06-27 | 1999-02-09 | Samsung Electronics Co., Ltd. | Heating control apparatus of air conditioner and method thereof |
US5881806A (en) * | 1997-08-18 | 1999-03-16 | University Of Central Florida | Air distribution fan and outside air damper recycling control |
US6431268B1 (en) * | 1997-08-18 | 2002-08-13 | 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 |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9671125B2 (en) * | 2010-04-14 | 2017-06-06 | Robert J. Mowris | Fan controller |
US9995493B2 (en) | 2010-04-14 | 2018-06-12 | Robert J. Mowris | Efficient fan controller |
US10281938B2 (en) | 2010-04-14 | 2019-05-07 | Robert J. Mowris | Method for a variable differential variable delay thermostat |
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 |
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 |
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 |
AU2017305408B2 (en) * | 2016-08-04 | 2019-04-04 | Cooper Technologies Company | Load control system and method for regulating power supply to a thermostat |
EP3494347A4 (en) * | 2016-08-04 | 2020-04-08 | Eaton Intelligent Power Limited | Load control system and method for regulating power supply to a 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 |
WO2018026986A1 (en) * | 2016-08-04 | 2018-02-08 | Cooper Technologies Company | Load control system and method for regulating power supply to a thermostat |
US10712036B2 (en) | 2017-06-05 | 2020-07-14 | Robert J. Mowris | Fault detection diagnostic variable differential variable delay thermostat |
CN112283867A (en) * | 2020-10-16 | 2021-01-29 | 海信(山东)空调有限公司 | Air conditioner and upgrading control method |
Also Published As
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WO2005070057A2 (en) | 2005-08-04 |
EP1733171A2 (en) | 2006-12-20 |
JP2007518057A (en) | 2007-07-05 |
WO2005070057A3 (en) | 2006-12-21 |
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