US20060286922A1 - Exhaust fan controller - Google Patents
Exhaust fan controller Download PDFInfo
- Publication number
- US20060286922A1 US20060286922A1 US11/153,528 US15352805A US2006286922A1 US 20060286922 A1 US20060286922 A1 US 20060286922A1 US 15352805 A US15352805 A US 15352805A US 2006286922 A1 US2006286922 A1 US 2006286922A1
- Authority
- US
- United States
- Prior art keywords
- sensor
- exhaust fan
- turn
- moisture
- fan motor
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
-
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
Definitions
- the invention is an electronic circuit sensing moisture in any enclosed space (especially a bathroom with shower/tub) and by the use of appropriate signal conditioning, amplification, timing and on-site power switching causing the already installed exhaust fan to be switched on for a time appropriate to dry the affected space and then be automatically switched off. (In the case of the average residential bathroom this is about 20 min.)
- the invention provides a solution to fungal and bacterial destruction of materials used in construction of, or being stored in moist environments.
- the current state of the art is both inadequate and not fuctional to provide protection that can be relied upon to properly maintain dry conditions where considerable economic loss may be entailed by both user and maintainence personnel not switching on the exhaust fan manually at all, or for such short times as to be ineffective as a means of preventing the accumulation of both fungal and bacterial outbreaks that are health threatening and destructive of the structures or stored objects themselves. This situation has long been and still is a large and growing economic and health problem which this invention addresses in a cost effective and practical way.
- the invention makes the decision to turn on the exhaust fan and dry out the confined space in the event that a factory predetermined moisture level has been exceeded, thereby limiting any destruction or health risks caused by negligance on the part of users or infrequent maintainence. Periodic Maintainence schedules are often extended so far as to be ineffective in moisture control.
- the invention takes the option to turn off the exhaust fan out of users control but not the option to turn it on.
- the invention is manufactured in such a way that all electronic components, sensor and pc board mounting fit into any ordinary switch box in a building electical system and wire directly into the already installed wiring for the manual switch which it will replace.
- the components with reference labels SENS 1 , R 7 , R 1 , 2 & R 3 , Q 1 and U 2 comprise the moisture sensing and post sensensing conditioning circuit.
- the moisture sensor itself has in this case been chosen for its cost effect manufacture and low component requirements to reliably trigger the rest of the Exhaust Fan Controller circuitry. It has been made as a half inch by half inch PC board with gold leads arranged as two interleaved four pronged forks spaced at about 1/20 an inch between the tines. (Refer to FIG. 1 , SENS 1 symbol details on the schematic).
- the NPN transistor(Q 1 ) recieves the “moisure present” signal from the sensor and shapes it appropriately to be used to drive the LM311 Comparator (U 2 ), which when the appropriate level is reached will trigger the LS7213 Timer (U 5 ) to drive the output triac (U 4 ) for the appropriate time chosen, which is established by the values of R 9 and C 5 . Nominal time: 20 min. Other values chosen for particular applications, adjustable from 1 second to hours.
- a signal from the Timer IC (U 5 ) pin 12 , thru resister R 11 to D 2 will light this LED whenever the exhaust fan is on. The LED is optional but recommended.
- IC U 1 is a triac driver optical coupler used to isolate the 110VAC being switched on and off by the triac to the exhaust fan motor. This optoisolation decouples the triac 110VAC switching current from the low voltage supplied IC and transistors of the circuits.
- the low voltage power supply shown is standard engineering practise.
- the minature transformer (T 1 ⁇ , full wave bridge rectifier (D 1 ), electrolytic capacitor (C 1 ), and the IC 5 volt regulator (U 3 ) supply the necessary regulated 5vdc to the entire circuit.
- Capacitors C 2 , C 3 , C 4 , and C 6 are bypass capacitors necessary to short unwanted voltage transients to ground.
- FIG. 1 shows the single 5vdc regulator option for the entire controller, and while makes it less sensetive to the amount of moisture vapor present, taking several minutes to switch on the exhaust fan motor, in most applications this delay is insignificant, in others the dual supply (9vds and 5vdc) regulators are preferred as being more sensetive and timely.
- the Light Switch circuit shown at the bottom right of Schematic is another option for sites which may operate both the exhaust fan and the lights from the same manual switch.
- the minature low voltage switches shown on the Schematic make the manual switching functions of turning on the fan motor at will, or turning the room lights on and off possible from a electrical box that formerly held only one manual electrical switch.
- the optocoupler (U 6 ) isolates the AC being switched at the triac (U 7 ) from the low voltage portions of the circuits.
- the detailed parts list is shown on the separate sheet ( FIG. 2 ).
Abstract
Description
- The invention is an electronic circuit sensing moisture in any enclosed space (especially a bathroom with shower/tub) and by the use of appropriate signal conditioning, amplification, timing and on-site power switching causing the already installed exhaust fan to be switched on for a time appropriate to dry the affected space and then be automatically switched off. (In the case of the average residential bathroom this is about 20 min.)
- The practical application of the invention requires the use of minature electronic components to fit into the space provided for and replacing an ordinary and standard manual switch used to switch on a room or other chosen space, exhaust fan. This invention requires no additional wiring to the building's electrical system and is a direct replacement for the manual exhaust fan switch installed as standard practise in all toilet and/or shower facilities.
- The invention provides a solution to fungal and bacterial destruction of materials used in construction of, or being stored in moist environments. The current state of the art is both inadequate and not fuctional to provide protection that can be relied upon to properly maintain dry conditions where considerable economic loss may be entailed by both user and maintainence personnel not switching on the exhaust fan manually at all, or for such short times as to be ineffective as a means of preventing the accumulation of both fungal and bacterial outbreaks that are health threatening and destructive of the structures or stored objects themselves. This situation has long been and still is a large and growing economic and health problem which this invention addresses in a cost effective and practical way.
- The invention makes the decision to turn on the exhaust fan and dry out the confined space in the event that a factory predetermined moisture level has been exceeded, thereby limiting any destruction or health risks caused by negligance on the part of users or infrequent maintainence. Periodic Maintainence schedules are often extended so far as to be ineffective in moisture control. The invention takes the option to turn off the exhaust fan out of users control but not the option to turn it on.
- The invention is manufactured in such a way that all electronic components, sensor and pc board mounting fit into any ordinary switch box in a building electical system and wire directly into the already installed wiring for the manual switch which it will replace.
- Referring to the Vent Fan Controller Schematic, provided as
FIG. 1 , the components with reference labels SENS 1, R7, R1,2 & R3, Q1 and U2 comprise the moisture sensing and post sensensing conditioning circuit. The moisture sensor itself has in this case been chosen for its cost effect manufacture and low component requirements to reliably trigger the rest of the Exhaust Fan Controller circuitry. It has been made as a half inch by half inch PC board with gold leads arranged as two interleaved four pronged forks spaced at about 1/20 an inch between the tines. (Refer toFIG. 1 ,SENS 1 symbol details on the schematic). This is not the only sensor configuration that we have found suitable to reliably detect moisture vapor, as we have show by experiment the more expensive sensor found in generic smoke detectors can be readily used with the appropriate changes to the sensing circuit component values, which will result in the invention working in an identical fashion, but not as inexpensive to produce. - The NPN transistor(Q1) recieves the “moisure present” signal from the sensor and shapes it appropriately to be used to drive the LM311 Comparator (U2), which when the appropriate level is reached will trigger the LS7213 Timer (U5) to drive the output triac (U4) for the appropriate time chosen, which is established by the values of R9 and C5. Nominal time: 20 min. Other values chosen for particular applications, adjustable from 1 second to hours. A signal from the Timer IC (U5) pin 12, thru resister R11 to D2 will light this LED whenever the exhaust fan is on. The LED is optional but recommended.
- IC U1 is a triac driver optical coupler used to isolate the 110VAC being switched on and off by the triac to the exhaust fan motor. This optoisolation decouples the triac 110VAC switching current from the low voltage supplied IC and transistors of the circuits.
- The low voltage power supply shown is standard engineering practise. In this Schematic (Fig.!) the minature transformer (T1 }, full wave bridge rectifier (D1), electrolytic capacitor (C1), and the
IC 5 volt regulator (U3) supply the necessary regulated 5vdc to the entire circuit. Capacitors C2, C3, C4, and C6 are bypass capacitors necessary to short unwanted voltage transients to ground. - We have also found by experiment that the power supply can benefit from slight changes, substituting a 9vdc regulator to supply the entire circuit, with the exception of the LSI timer, which requires a 5vdc regulator, makes a much more sensetive circuit, both in the lower level of moisture vapor it will detect and the speed of its response.
- The Schematic (
FIG. 1 ) shows the single 5vdc regulator option for the entire controller, and while makes it less sensetive to the amount of moisture vapor present, taking several minutes to switch on the exhaust fan motor, in most applications this delay is insignificant, in others the dual supply (9vds and 5vdc) regulators are preferred as being more sensetive and timely. - The Light Switch circuit shown at the bottom right of Schematic (
FIG. 1 ) is another option for sites which may operate both the exhaust fan and the lights from the same manual switch. The minature low voltage switches shown on the Schematic (SW1 and SW2) make the manual switching functions of turning on the fan motor at will, or turning the room lights on and off possible from a electrical box that formerly held only one manual electrical switch. Again, the optocoupler (U6) isolates the AC being switched at the triac (U7) from the low voltage portions of the circuits. The detailed parts list is shown on the separate sheet (FIG. 2 ).
Claims (1)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/153,528 US20060286922A1 (en) | 2005-06-14 | 2005-06-14 | Exhaust fan controller |
CA002612390A CA2612390A1 (en) | 2005-06-14 | 2006-06-13 | Exhaust fan controller |
PCT/US2006/022974 WO2006138303A2 (en) | 2005-06-14 | 2006-06-13 | Exhaust fan controller |
JP2008517013A JP2008546975A (en) | 2005-06-14 | 2006-06-13 | Ventilation fan controller |
EP06773026A EP1907763A2 (en) | 2005-06-14 | 2006-06-13 | Exhaust fan controller |
US11/778,390 US20080011863A1 (en) | 2005-06-14 | 2007-07-16 | Moisture vapor exhaust system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/153,528 US20060286922A1 (en) | 2005-06-14 | 2005-06-14 | Exhaust fan controller |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/778,390 Continuation-In-Part US20080011863A1 (en) | 2005-06-14 | 2007-07-16 | Moisture vapor exhaust system |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060286922A1 true US20060286922A1 (en) | 2006-12-21 |
Family
ID=37571065
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/153,528 Abandoned US20060286922A1 (en) | 2005-06-14 | 2005-06-14 | Exhaust fan controller |
US11/778,390 Abandoned US20080011863A1 (en) | 2005-06-14 | 2007-07-16 | Moisture vapor exhaust system |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/778,390 Abandoned US20080011863A1 (en) | 2005-06-14 | 2007-07-16 | Moisture vapor exhaust system |
Country Status (5)
Country | Link |
---|---|
US (2) | US20060286922A1 (en) |
EP (1) | EP1907763A2 (en) |
JP (1) | JP2008546975A (en) |
CA (1) | CA2612390A1 (en) |
WO (1) | WO2006138303A2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100078494A1 (en) * | 2008-10-01 | 2010-04-01 | Marco Mularoni | Humidity-activated ventilation system switch |
US20120015597A1 (en) * | 2010-07-16 | 2012-01-19 | U.S. Sunlight Corp. | Method and Apparatus for Attic Fan Power Controller with Remote Control |
US8640970B2 (en) | 2009-05-27 | 2014-02-04 | Direct Success, Llc | Air quality control system |
CN104735948A (en) * | 2013-12-19 | 2015-06-24 | 西安恒飞电子科技有限公司 | Power supply detection alarm power supply device |
CN105465952A (en) * | 2015-12-11 | 2016-04-06 | 重庆财信合同能源管理有限公司 | Automatic monitoring method and system for bathroom air environmental parameters |
US9441884B2 (en) | 2012-05-10 | 2016-09-13 | Norgren Automation Solutions, Llc | Method and apparatus for automatically drying wet floors |
US9976764B2 (en) | 2014-05-28 | 2018-05-22 | Leviton Manufacturing Co., Inc. | Apparatus and methods for controlling a ventilation mechanism |
US11566817B1 (en) | 2019-03-22 | 2023-01-31 | Anthony Magaro | Air circulation system |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102998993A (en) * | 2012-11-20 | 2013-03-27 | 无锡商业职业技术学院 | Exhaust fan controller |
CN105782096A (en) * | 2016-03-30 | 2016-07-20 | 上海斐讯数据通信技术有限公司 | Exhaust fan control equipment, mobile equipment and exhaust fan |
US10458669B2 (en) | 2017-03-29 | 2019-10-29 | Johnson Controls Technology Company | Thermostat with interactive installation features |
US10866003B2 (en) | 2017-04-14 | 2020-12-15 | Johnson Controls Technology Company | Thermostat with preemptive heating, cooling, and ventilation in response to elevated occupancy detection via proxy |
WO2018191688A2 (en) | 2017-04-14 | 2018-10-18 | Johnson Controls Techology Company | Thermostat with exhaust fan control for air quality and humidity control |
EP3610204A4 (en) | 2017-04-14 | 2021-05-12 | Johnson Controls Technology Company | Multi-function thermostat with intelligent supply fan control for maximizing air quality and optimizing energy usage |
US10837665B2 (en) | 2017-04-14 | 2020-11-17 | Johnson Controls Technology Company | Multi-function thermostat with intelligent ventilator control for frost/mold protection and air quality control |
US10731885B2 (en) | 2017-04-14 | 2020-08-04 | Johnson Controls Technology Company | Thermostat with occupancy detection via proxy measurements of a proxy sensor |
US10712038B2 (en) | 2017-04-14 | 2020-07-14 | Johnson Controls Technology Company | Multi-function thermostat with air quality display |
US11131474B2 (en) | 2018-03-09 | 2021-09-28 | Johnson Controls Tyco IP Holdings LLP | Thermostat with user interface features |
Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3864659A (en) * | 1972-07-25 | 1975-02-04 | Asahi Glass Co Ltd | Humidity sensor |
US4251026A (en) * | 1979-12-05 | 1981-02-17 | Butler Ventamatic Corp. | Attic ventilation control system |
US4522060A (en) * | 1982-03-24 | 1985-06-11 | Murata Manufacturing Co., Ltd. | Dry/dew/frost sensor |
US4635027A (en) * | 1984-08-28 | 1987-01-06 | Sharp Kabushiki Kaisha | Resistance-variation type moisture sensor |
US4675935A (en) * | 1986-03-14 | 1987-06-30 | Tennant Company | Control and monitor for a floor maintenance device |
US4707244A (en) * | 1986-01-21 | 1987-11-17 | Beckman Industrial Corporation | Solid state sensor element |
US4831493A (en) * | 1987-12-28 | 1989-05-16 | Ppg Industries, Inc. | Windshield moisture sensor |
US4942364A (en) * | 1988-02-19 | 1990-07-17 | Asahi Kasei Kogyo Kabushiki Kaisha | Moisture and dew-detection sensor |
US4953784A (en) * | 1986-12-24 | 1990-09-04 | Kabushiki Kaisha Toshiba | Ventilator drive system |
US5040411A (en) * | 1989-12-27 | 1991-08-20 | Ppg Industries, Inc. | Windshield moisture sensor |
US5045828A (en) * | 1989-07-27 | 1991-09-03 | Texas Instruments Incorporated | Fluoropolymer humidity sensors |
US5232152A (en) * | 1991-10-30 | 1993-08-03 | Tsang Richard W B | Range hood fan with atmospheric humidity sensor |
US5809826A (en) * | 1996-07-29 | 1998-09-22 | Baker, Jr.; Hugh M. | Inferential condensation sensor |
US6223543B1 (en) * | 1999-06-17 | 2001-05-01 | Heat-Timer Corporation | Effective temperature controller and method of effective temperature control |
US6230980B1 (en) * | 1996-08-09 | 2001-05-15 | Ray Hudson Limited | Ventilation controlling apparatus |
US20030039298A1 (en) * | 2001-08-22 | 2003-02-27 | Lear Corporation | System and method of vehicle climate control |
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US6646560B1 (en) * | 2001-10-26 | 2003-11-11 | H. P. Intellectual Corp. | Window fan with rain sensing control |
US20030222783A1 (en) * | 2002-05-28 | 2003-12-04 | Mark Amacher | Moisture detection and location system |
US6935570B2 (en) * | 2002-09-03 | 2005-08-30 | Phillip F. Acker | Ventilation system with humidity responsive ventilation controller |
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GB1206594A (en) * | 1966-12-19 | 1970-09-23 | British Iron Steel Research | Improvements relating to moisture detectors |
JPS6380140A (en) * | 1986-09-22 | 1988-04-11 | Mitsubishi Electric Corp | Automatic operating apparatus bath ventilation fan |
JPS63207933A (en) * | 1987-02-20 | 1988-08-29 | Matsushita Seiko Co Ltd | Ventilation device for preventing condensation |
-
2005
- 2005-06-14 US US11/153,528 patent/US20060286922A1/en not_active Abandoned
-
2006
- 2006-06-13 EP EP06773026A patent/EP1907763A2/en not_active Withdrawn
- 2006-06-13 CA CA002612390A patent/CA2612390A1/en not_active Abandoned
- 2006-06-13 JP JP2008517013A patent/JP2008546975A/en active Pending
- 2006-06-13 WO PCT/US2006/022974 patent/WO2006138303A2/en active Application Filing
-
2007
- 2007-07-16 US US11/778,390 patent/US20080011863A1/en not_active Abandoned
Patent Citations (20)
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US3864659A (en) * | 1972-07-25 | 1975-02-04 | Asahi Glass Co Ltd | Humidity sensor |
US4251026A (en) * | 1979-12-05 | 1981-02-17 | Butler Ventamatic Corp. | Attic ventilation control system |
US4522060A (en) * | 1982-03-24 | 1985-06-11 | Murata Manufacturing Co., Ltd. | Dry/dew/frost sensor |
US4635027A (en) * | 1984-08-28 | 1987-01-06 | Sharp Kabushiki Kaisha | Resistance-variation type moisture sensor |
US4707244A (en) * | 1986-01-21 | 1987-11-17 | Beckman Industrial Corporation | Solid state sensor element |
US4675935A (en) * | 1986-03-14 | 1987-06-30 | Tennant Company | Control and monitor for a floor maintenance device |
US4953784A (en) * | 1986-12-24 | 1990-09-04 | Kabushiki Kaisha Toshiba | Ventilator drive system |
US4831493A (en) * | 1987-12-28 | 1989-05-16 | Ppg Industries, Inc. | Windshield moisture sensor |
US4942364A (en) * | 1988-02-19 | 1990-07-17 | Asahi Kasei Kogyo Kabushiki Kaisha | Moisture and dew-detection sensor |
US5045828A (en) * | 1989-07-27 | 1991-09-03 | Texas Instruments Incorporated | Fluoropolymer humidity sensors |
US5040411A (en) * | 1989-12-27 | 1991-08-20 | Ppg Industries, Inc. | Windshield moisture sensor |
US5232152A (en) * | 1991-10-30 | 1993-08-03 | Tsang Richard W B | Range hood fan with atmospheric humidity sensor |
US5809826A (en) * | 1996-07-29 | 1998-09-22 | Baker, Jr.; Hugh M. | Inferential condensation sensor |
US6230980B1 (en) * | 1996-08-09 | 2001-05-15 | Ray Hudson Limited | Ventilation controlling apparatus |
US6526807B1 (en) * | 1998-06-18 | 2003-03-04 | Joseph Doumit | Early warning water leak detection system |
US6223543B1 (en) * | 1999-06-17 | 2001-05-01 | Heat-Timer Corporation | Effective temperature controller and method of effective temperature control |
US20030039298A1 (en) * | 2001-08-22 | 2003-02-27 | Lear Corporation | System and method of vehicle climate control |
US6646560B1 (en) * | 2001-10-26 | 2003-11-11 | H. P. Intellectual Corp. | Window fan with rain sensing control |
US20030222783A1 (en) * | 2002-05-28 | 2003-12-04 | Mark Amacher | Moisture detection and location system |
US6935570B2 (en) * | 2002-09-03 | 2005-08-30 | Phillip F. Acker | Ventilation system with humidity responsive ventilation controller |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100078494A1 (en) * | 2008-10-01 | 2010-04-01 | Marco Mularoni | Humidity-activated ventilation system switch |
US8640970B2 (en) | 2009-05-27 | 2014-02-04 | Direct Success, Llc | Air quality control system |
US20120015597A1 (en) * | 2010-07-16 | 2012-01-19 | U.S. Sunlight Corp. | Method and Apparatus for Attic Fan Power Controller with Remote Control |
US9182138B2 (en) * | 2010-07-16 | 2015-11-10 | Air Vent, Inc. | Method and apparatus for attic fan power controller with remote control |
US9441884B2 (en) | 2012-05-10 | 2016-09-13 | Norgren Automation Solutions, Llc | Method and apparatus for automatically drying wet floors |
CN104735948A (en) * | 2013-12-19 | 2015-06-24 | 西安恒飞电子科技有限公司 | Power supply detection alarm power supply device |
US9976764B2 (en) | 2014-05-28 | 2018-05-22 | Leviton Manufacturing Co., Inc. | Apparatus and methods for controlling a ventilation mechanism |
US11015831B2 (en) | 2014-05-28 | 2021-05-25 | Leviton Manufacturing Co., Inc. | Apparatus and methods for controlling a ventilation mechanism |
CN105465952A (en) * | 2015-12-11 | 2016-04-06 | 重庆财信合同能源管理有限公司 | Automatic monitoring method and system for bathroom air environmental parameters |
US11566817B1 (en) | 2019-03-22 | 2023-01-31 | Anthony Magaro | Air circulation system |
Also Published As
Publication number | Publication date |
---|---|
JP2008546975A (en) | 2008-12-25 |
EP1907763A2 (en) | 2008-04-09 |
CA2612390A1 (en) | 2006-12-28 |
US20080011863A1 (en) | 2008-01-17 |
WO2006138303A2 (en) | 2006-12-28 |
WO2006138303A3 (en) | 2007-04-26 |
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