GB2396209A - Fan controller - Google Patents

Fan controller Download PDF

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Publication number
GB2396209A
GB2396209A GB0322541A GB0322541A GB2396209A GB 2396209 A GB2396209 A GB 2396209A GB 0322541 A GB0322541 A GB 0322541A GB 0322541 A GB0322541 A GB 0322541A GB 2396209 A GB2396209 A GB 2396209A
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GB
United Kingdom
Prior art keywords
controller
fan
signal
sensor
gas
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.)
Granted
Application number
GB0322541A
Other versions
GB2396209B (en
GB0322541D0 (en
GB2396209B8 (en
Inventor
Phillip John West
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB0322541D0 publication Critical patent/GB0322541D0/en
Publication of GB2396209A publication Critical patent/GB2396209A/en
Publication of GB2396209B publication Critical patent/GB2396209B/en
Application granted granted Critical
Publication of GB2396209B8 publication Critical patent/GB2396209B8/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • 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
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2021—Arrangement or mounting of control or safety systems
    • 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
    • F24F11/0001—Control or safety arrangements for ventilation
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D22/00—Control of humidity
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/70—Carbon dioxide
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/72—Carbon monoxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Ventilation (AREA)

Abstract

A controller 10 for a ventilation or extraction fan 12 has an output 11 for fan control and inputs 14 for receiving signals "A", "B", "C", "D", "E" from a variety of input sensors. The controller is arranged to control the fan rotational speed and/or switch the fan on or off in response to at least one sensor input signal. The controller may be used in conjunction with a cooking device that may be an electric or gas hob. The input signals may include a signal representing measured current from the electrical hob supply or a signal representing the gas flow to the gas hob. Other input signals may include temperature, humidity, and gas concentration, for example, combustion gases such as carbon monoxide, carbon dioxide, or other noxious gases. The controller may detect a signal threshold value or a rate of signal increase greater than a predetermined rate, and may also detect which type of sensor is connected and configure a signal processor 16 accordingly. Other examples of where the extractor fan may be used include kitchens, bathrooms, or hot water shower applications.

Description

FAN CONTROLLER
The present invention relates to a controller for a ventilation or extraction fan.
In many circumstances, it is desirable to switch on a ventilation or extraction fan, or vary the speed of the fan, 5 in response to one or more environmental conditions. In different applications, it is necessary or desirable to respond to different environmental conditions.
We have now devised a controller which is arranged to respond to any of a number of different sensors, so that the 10 controller may be used in any of a number of possible applications or situations.
In accordance with the present invention, there is provided a controller for a ventilation or extraction fan, the controller having an output for controlling the fan, and input 15 means for receiving an output signal from any one of a plurality of sensors of respective, different parameters, the controller being arranged to switch the fan on or off and/or to control the rotary speed of the fan in accordance with the sensor signal received by its said input means.
20 The input means of the controller may be connected to a current sensor coupled to the power cable supplying an electric cooking bob. In this application, it can be expected that the greater the current drawn by the bob, the greater the quantity of steam that will be generated. Preferably therefore 25 the controller is arranged to switch the fan on when the current sensor indicates that greater than a predetermined current is being drawn. Alternatively, the controller may be arranged to switch the fan on in response to the current increasing at greater than a predetermined rate. Instead or 30 in addition, preferably the controller is arranged to increase the rotary speed of the fan as the sensed current increases.
The input means of the controller may be-connected to a gas flow sensor fitted in or coupled to-the gas supply pipe to a gas cooking bob. In this application, it can be expected
that the greater the flow rate of gas to the bob, the greater the quantity of steam that will be generated. Preferably therefore the controller is arranged to switch the fan on when the gas flow sensor indicates greater than a predetermined flow 5 rate. Alternatively, the controller may be arranged to switch the fan on in response to the gas flow increasing at greater than a predetermined rate. Instead or in addition, preferably the controller is arranged to increase the rotary speed of the fan as the sensed gas flow rate increases.
10 The input means of the controller may be connected to a temperature sensor, coupled to the hot water supply pipe to a shower or other hot water outlet. In this application, it can be expected that when hot water is flowing from the shower head or other hot water outlet, steam will accumulate in the 15 room or space concerned. Preferably therefore, the controller is arranged to switch the fan on when the sensed temperature of the hot water supply pipe is above a predetermined level.
Alternatively, the controller may be arranged to switch the fan on in response to the sensed temperature rising at greater than 20 a predetermined rate.
The input means of the controller may be connected to a humidity sensor. The controller may be arranged to switch the fan on when the sensed humidity is greater than a predetermined value. In this application, however, it can be 25 expected that the humidity level will rise rapidly following the commencement of cooking on a kitchen hob, or the turning on of a shower for example in a bathroom. Preferably therefore the controller is arranged to respond to the sensed humidity rising at greater than a predetermined rate, to switch the fan 30 on.
The input means of the controller may be connected to a gas sensor. Preferably the gas sensor is arranged to sense the presence of carbon dioxide, carbon monoxide or other noxious gas. The controller may be arranged to switch the fan 35 on when the gas sensor detects greater than a predetermined
concentration of the respective gas. Preferably the controller is arranged to increase the rotary speed of the fan as the sensed concentration of the respective gas increases.
The input means may be arranged to receive output 5 signals from two or more said sensors of respective, different parameters, the controller being arranged to switch the fan on and/or to control the rotary speed of the fan in response to, and in accordance with, an output signal from any one of the said sensors coupled to said input means.
10 In some situations, I have found that a rapid rate of change of the sensed parameter gives a better indication of the need to switch on the fan. Also in accordance with the present invention, therefore, there is provided a controller for a ventilation or extraction fan, the controller having an output 15 for controlling the fan, and input means for receiving an output signal from a sensor, the controller being arranged to switch the fan on in response to said output signal indicating a change at greater than a predetermined rate in the parameter sensed by said sensor.
20 An embodiment of the present invention will now be described by way of example only and with reference to the accompanying drawing, the single Figure of which is a schematic diagram of an extraction fan controller in accordance with the present invention.
25 Referring to the drawing, there is shown a controller 10 having an output 11 for controlling a ventilation or extraction fan 12. The controller has input means 14 for receiving an output signal from any one of a plurality of sensors: in the example shown, the input means comprises a 30 corresponding number of separate inputs, namely first, second, third, fourth and fifth signal inputs A, B. C, D and E, although in a modification two or more of these may be combined into single input to which any selected one of a number of predetermined sensors may be connected.
35 Input A is arranged for connection to the output of a
current sensor, coupled to the electrical power cable of an electric cooking bob. A signal processor 16 of the controller 10 is arranged to respond to a signal on its input A to switch on the fan 12 if the signal indicates that the current being 5 drawn by the electric cooking bob is above a predetermined value, or if the current being drawn increases at greater than a predetermined rate. Additionally, the controller 10 may be arranged to respond to the signal on its input A to increase the rotary speed of the fan 12 according to the current value, 10 as indicated by this input signal.
Input B of the controller 10 is arranged for connection to the output of a gas flow sensor, fitted in or coupled to the gas supply pipe of a gas cooking bob. The signal processor 16 is arranged to respond to a signal on its input B to switch on 15 the fan 12 if the signal indicates that the rate of flow of gas to the gas cooking hob is above a predetermined value, or has increased at greater than a predetermined rate. Additionally, the signal processor 16 may be arranged to respond to the gas flow signal to increase the rotary speed of the fan 12 20 according to the sensed rate of gas flow.
Input C of the controller 10 is arranged for connection to the output of a temperature sensor, coupled to the hot water supply pipe of a shower or other hot water outlet. The signal processor 16 is arranged to respond to a signal on its input 25 C to switch on the fan 12 if the signal indicates that the sensed temperature of the water pipe is above a predetermined level, or if the sensed temperature has risen at greater than a predetermined rate.
Input D of the controller 10 is arranged for connection 30 to the output of a humidity sensor. The signal processor 16 is arranged to monitor the signal on its input and to respond to the humidity increasing at greater than a predetermined rate, to switch on the fan 12.
Input E of the controller 10 is arranged for connection 35 to a gas sensor, the sensor being arranged to sense the
presence of carbon dioxide, or carbon monoxide, or another noxious gas. The controller 10 is arranged to switch the fan on when the gas sensor detects greater than a predetermined concentration of the respective gas, and preferably to increase 5 the rotary speed of the fan as the sensed concentration of the respective gas increases.
The input means 14 may be arranged to detect which of the possible sensors is connected to it, to reconfigure the signal processor 16 for that sensor, and so respond correctly 10 to its output signal.
It will be appreciated that the controller 10 may be used in any of four different applications, i.e. to control a fan in a kitchen provided with an electric cooking bob, or a fan in a kitchen provided with a gas cooking bob, or a fan 15 associated with a shower or other hot water outlet (the temperature of the hot water supply pipe being monitored), or in a kitchen, bathroom or shower room (where the humidity is monitored). This avoids the need for the manufacturer and suppliers to make different controllers available for the 20 different applications.
In a modification, two or more appropriate sensors may be connected to the respective inputs A-B, or to the input means 14, and the controller 10 arranged to respond to the signal from any of these sensors, to switch the fan 12 on or 25 alter the speed of the fan, in the manner described above.
For example, a current sensor (coupled to the power cable of an electric cooking bob) or a gas flow sensor (coupled to the gas supply pipe of a gas cooking bob) may be connected to the input means 14, together with a temperature sensor (coupled to 30 the hot water supply pipe of a shower or bath): the controller 10 may be arranged to switch the fan 12 on if the current (or gas flow) sensor indicates that the current (or gas) drawn by the cooking hob is above a predetermined level, or if the temperature sensor indicates a temperature above a 35 predetermined level.

Claims (1)

1) A controller for a ventilation or extraction fan, the controller having an output for controlling the fan, and input means for receiving an output signal from any one of a 5 plurality of sensors of respective, different parameters, the controller being arranged to switch the fan on or off and/or to control the rotary speed of the fan in accordance with the sensor signal received by its said input means.
2) A controller as claimed in claim 1, arranged to respond 10 to a signal, received by its said input means, from a current sensor coupled to a power cable supplying an electric cooking bob. 3) A controller as claimed in claim 2, arranged to switch the fan on in response to the signal from said current sensor 15 indicating that greater than a predetermined current is being drawn by said electric cooking bob.
4) A controller as claimed in claim 2, arranged to switch the fan on in response to the signal from said current sensor indicating that the current being drawn by said electric 20 cooking hob is increasing at greater than a predetermined rate.
5) A controller as claimed in any one of claims 2 to 4, arranged to increase the rotary speed of the fan as the current drawn by said electric cooking hob, as indicated by the signal from said current sensor, increases.
25 6) A controller as claimed in claim 1, arranged to respond to a signal, received by its said input means, from a gas flow sensor fitted in or coupled to the gas supply pipe to a gas cooking bob.
7) A controller as claimed in claim 6, arranged to switch the fan on in response to the signal from said gas flow sensor indicating that gas is flowing to said gas cooking hob at greater than a predetermined rate.
5 8) A controller as claimed in claim 6, arranged to switch the fan on in response to the signal from said gas flow sensor indicating that the gas flow to said gas cooking hob is increasing at greater than a predetermined rate.
9) A controller as claimed in any one of claims 6 to 8, 10 arranged to increase the rotary speed of the fan as the rate of flow of gas to said cooking bob, as indicated by the signal from said gas flow sensor, increases.
10) A controller as claimed in claim 1, arranged to respond to a signal, received by its input means, from a temperature 15 sensor.
11) A controller as claimed in claim 10, arranged to switch the fan on in response to the signal from said temperature sensor indicating a sensed temperature above a predetermined level. 20 12) A controller as claimed in claim 10 or 11, arranged to switch the fan on in response to the signal from the temperature sensor indicating that the sensed temperature is rising at greater than a predetermined rate.
13) A controller as claimed in claim 1, arranged to respond 25 to a signal, received by its said input means, from a humidity sensor. 14) A controller as claimed in claim 13, arranged to switch
the fan on in response to the signal from said humidity sensor indicating that the sensed humidity is greater than a predetermined value.
15) A controller as claimed in claim 13 arranged to switch 5 the fan on in response to the signal from the humidity sensor indicating that the sensed humidity is rising at greater than a predetermined rate.
16) A controller as claimed in claim 1, arranged to respond to a signal, received by its said input means, from a gas 10 sensor.
17) A controller as claimed in claim 16, arranged to switch the fan on in response to the signal from the gas sensor indicating the presence of greater than a predetermined concentration of a predetermined gas.
IS 18) A controller as claimed in claim 16 or 17, arranged to increase the rotary speed of the fan as the concentration of a predetermined gas, as indicated by the signal received from said gas sensor, increases.
19) A controller as claimed in any preceding claim, arranged 20 to detect which of a plurality of possible sensors is connected to its said input means, to reconfigure a signal processor thereof appropriately for that sensor.
20) A controller as claimed in any preceding claim, in which said input means is arranged to receive output signals from two 25 or more said sensors of respective, different parameters, the controller being arranged to switch the fan on or off and/or to control the rotary speed of the fan in response to, and in accordance with, an output signal from any one of the said
sensors coupled to said input means.
21) A controller for a ventilation or extraction fan, the controller having an output for controlling the fan, and input means for receiving an output signal from a sensor, the 5 controller being arranged to switch the fan on in response to said output signal indicating a change at greater than a predetermined rate in the parameter sensed by said sensor.
22) A controller for a ventilation or extraction fan, the controller being substantially as herein described with lo reference to the accompanying drawings.
GB0322541A 2002-12-10 2003-09-26 Fan controller Expired - Lifetime GB2396209B8 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0228734.0A GB0228734D0 (en) 2002-12-10 2002-12-10 Fan controller

Publications (4)

Publication Number Publication Date
GB0322541D0 GB0322541D0 (en) 2003-10-29
GB2396209A true GB2396209A (en) 2004-06-16
GB2396209B GB2396209B (en) 2007-01-03
GB2396209B8 GB2396209B8 (en) 2008-01-29

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GBGB0228734.0A Ceased GB0228734D0 (en) 2002-12-10 2002-12-10 Fan controller
GB0322541A Expired - Lifetime GB2396209B8 (en) 2002-12-10 2003-09-26 Fan controller

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Application Number Title Priority Date Filing Date
GBGB0228734.0A Ceased GB0228734D0 (en) 2002-12-10 2002-12-10 Fan controller

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100441959C (en) * 2005-11-22 2008-12-10 庞辉龙 Intelligent fume exhauster
CN102538047A (en) * 2012-03-01 2012-07-04 佛山市顺德万和电气配件有限公司 Intelligent smoke exhaust ventilator and control method thereof
WO2013041518A1 (en) * 2011-09-19 2013-03-28 BSH Bosch und Siemens Hausgeräte GmbH Cooker, and combination of cooker and range hood
WO2013041514A1 (en) * 2011-09-19 2013-03-28 BSH Bosch und Siemens Hausgeräte GmbH Cooker, and combination of cooker and range hood
EP2594859A1 (en) * 2007-07-04 2013-05-22 Food Industry Technical Ltd. Air control system and method
DE102006062410B4 (en) * 2006-12-22 2014-05-08 Rolf Strothmann ventilation device
CN104121216A (en) * 2014-07-28 2014-10-29 钱青松 Intelligent energy-saving induction fan system and operation method thereof
US20140322083A1 (en) * 2013-03-14 2014-10-30 Solidia Technologies, Inc. Curing systems for materials that consume carbon dioxide and method of use thereof
WO2018051178A1 (en) * 2016-09-13 2018-03-22 P.G.A. Srl System for automating the switching on, adjustment and/or switching off of one or more accessories for cooktops
CN108870489A (en) * 2018-06-28 2018-11-23 广州视源电子科技股份有限公司 Self-adaptive stalling method and device for push rod motor, storage medium and equipment
CN111998415A (en) * 2020-09-11 2020-11-27 华帝股份有限公司 Cooking equipment and oil smoke emission control method
DE102020115654A1 (en) 2020-06-15 2021-12-16 Miele & Cie. Kg Extractor hood and flow meters arranged or mountable on a gas hob, as well as methods for operating the extractor hood and the flow meter
US11517874B2 (en) 2014-01-22 2022-12-06 Solidia Technologies, Inc. Method and apparatus for curing CO2 composite material objects at near ambient temperature and pressure
GB2611322A (en) * 2021-09-29 2023-04-05 Tamworth Corporation Ltd Ventilation demand control

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JP7121985B2 (en) * 2018-08-06 2022-08-19 富士工業株式会社 Range food
WO2023035590A1 (en) * 2021-09-09 2023-03-16 佛山市顺德区美的洗涤电器制造有限公司 Control method, control apparatus, kitchen appliance, and readable storage medium

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JPS63204048A (en) * 1987-02-19 1988-08-23 Fujita Corp Full-automatic range hood with inverter
GB2203828A (en) * 1987-04-07 1988-10-26 British Gas Plc Controlling ventilator fans
GB2210966A (en) * 1987-10-01 1989-06-21 Hunter Int Ltd Ventilating fan control arrangement
JPH01273939A (en) * 1988-04-27 1989-11-01 Hitachi Ltd Automatic ventilating device
GB2241989A (en) * 1990-03-15 1991-09-18 Hsieh Tang Electric Co Ltd Ventilating fan with shutter
EP0465020A2 (en) * 1990-06-30 1992-01-08 Gold Star Co. Ltd An electronic range having a fan motor rotation control function
JPH05180475A (en) * 1991-12-17 1993-07-23 Hitachi Ltd Automatic ventilation fan for bathroom
JPH05322243A (en) * 1992-05-25 1993-12-07 Hitachi Ltd Automatically operated range hood fan
GB2309746A (en) * 1996-02-05 1997-08-06 Nuaire Ltd Fan controller
JPH10253106A (en) * 1997-03-10 1998-09-25 Sekisui Chem Co Ltd Indoor ventilating device and method for ventilation
JP2001208408A (en) * 2000-01-26 2001-08-03 Matsushita Electric Works Ltd Fan switch
US6446624B1 (en) * 2000-10-12 2002-09-10 Taiwan Sakura Corporation Smart circuit device of smoke exhauster for cooking

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100441959C (en) * 2005-11-22 2008-12-10 庞辉龙 Intelligent fume exhauster
DE102006062410B4 (en) * 2006-12-22 2014-05-08 Rolf Strothmann ventilation device
EP2594859A1 (en) * 2007-07-04 2013-05-22 Food Industry Technical Ltd. Air control system and method
WO2013041518A1 (en) * 2011-09-19 2013-03-28 BSH Bosch und Siemens Hausgeräte GmbH Cooker, and combination of cooker and range hood
WO2013041514A1 (en) * 2011-09-19 2013-03-28 BSH Bosch und Siemens Hausgeräte GmbH Cooker, and combination of cooker and range hood
CN102538047A (en) * 2012-03-01 2012-07-04 佛山市顺德万和电气配件有限公司 Intelligent smoke exhaust ventilator and control method thereof
US20140322083A1 (en) * 2013-03-14 2014-10-30 Solidia Technologies, Inc. Curing systems for materials that consume carbon dioxide and method of use thereof
US9221027B2 (en) * 2013-03-14 2015-12-29 Solidia Technologies, Inc. Curing systems for materials that consume carbon dioxide and method of use thereof
US11517874B2 (en) 2014-01-22 2022-12-06 Solidia Technologies, Inc. Method and apparatus for curing CO2 composite material objects at near ambient temperature and pressure
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GB2396209B8 (en) 2008-01-29

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