WO1998028944A1 - Dispositif de prevention d'incendie pour cuisiniere electrique - Google Patents

Dispositif de prevention d'incendie pour cuisiniere electrique Download PDF

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Publication number
WO1998028944A1
WO1998028944A1 PCT/CA1997/000982 CA9700982W WO9828944A1 WO 1998028944 A1 WO1998028944 A1 WO 1998028944A1 CA 9700982 W CA9700982 W CA 9700982W WO 9828944 A1 WO9828944 A1 WO 9828944A1
Authority
WO
WIPO (PCT)
Prior art keywords
stove
sensor
oven
heating element
burners
Prior art date
Application number
PCT/CA1997/000982
Other languages
English (en)
Inventor
Jozef Rak
Original Assignee
Jozef Rak
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 Jozef Rak filed Critical Jozef Rak
Priority to AU54722/98A priority Critical patent/AU5472298A/en
Publication of WO1998028944A1 publication Critical patent/WO1998028944A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0258—For cooking
    • H05B1/0261—For cooking of food
    • H05B1/0266—Cooktops
    • 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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices

Definitions

  • the present invention relates to a safety device.
  • a safety device for electric or gas stoves .
  • the present invention is designed to minimize fire hazards caused by leaving an operating stove unattended for long periods of time.
  • the device can be used with an electric or gas cooking stove. In the case that an electrical stove is turned ON and left unattended for some period of time, the present device will shut OFF the power supplied to the heating elements after a preprogrammed period of time in order to substantially eliminate the fire hazard.
  • the present invention provides a safety device for a stove which has at least one heating element, said device comprising: a) a sensor for detecting the presence of a person in the vicinity of the stove; b) a heating element controller for controlling whether the heating element is on or off; c) a timer-controller, connected to the sensor and the heating element controller, which i) when a person is in the vicinity of the stove as determined by the sensor, allows the heating element to be on, and ii) when a person is not in the vicinity of the stove as determined by the sensor, turns the heating element off after a predetermined time delay.
  • the heating element is selected from the group consisting of a gas burner and an electric element.
  • the senor is selected from the group consisting of a motion sensor, a body heat sensor, a laser beam, a photoelectric sensor, an electromagnetic wave sensor and a floor pressure pad.
  • the stove has from one to four heating elements on top of the stove. In a further embodiment, the stove has from one to four heating elements on top of the stove and each heating element has a separate safety device.
  • the stove has from one to four heating elements on top of the stove and at least two heating elements are simultaneously controlled by a single safety device.
  • the timer-controller has a timing relay.
  • the senor is attached to the stove.
  • the senor is separate from the stove and the timer-controller has means for receiving a signal from the sensor to indicate the presence or otherwise of a person in the vicinity of the stove.
  • the invention also provides a method for installing the present device as a separate, stand alone unit connected with the stove's electric circuitry.
  • the device protects from fire hazards every single heating element (burner) of the electric stove with separate circuitry, relays and a separate timing relay (off relay) for each heating element (burner) protected, in which case time-delay period can be specified individually for every heating element (burner) .
  • the device protects from fire hazards all heating elements (burners) of the stove simultaneously with a single timing relay (off delay) and a set of relays for all heating elements (burners) protected, in which case time-delay period can only be set to the same value for every heating element (burner) .
  • the device protects from fire hazards the oven of the electric stove by the use of a different timing relay which would not allow the heating element to be turned back ON once the preprogrammed period of time on the timing relay has elapsed, causing the oven to be turned OFF, in order to turn the oven back ON the user must turn it ON manually.
  • Figure 1 is an electric schematic diagram of one embodiment of the present invention.
  • Figure 2 is a front view of a stove with a motion sensor installed on the stove.
  • Figure 3 is a top view of the stove shown in Figure 2.
  • Figure 4 is a side view of the stove shown in Figure 2.
  • Figure 1 shows an electric schematic diagram suitable for operating a safety device of the present invention, in relation to an electrically operated stove with electric elements.
  • the senor used in the present invention monitors surroundings of the stove for human activity. If there is no human presence detected for a preprogrammed period of time, the heating elements of the stove will be automatically turned off. The present device may turn the heating elements back on immediately upon detecting any human presence, e.g. motion, in the stove area.
  • the safety device prevents the heating elements from coming on, even after the preprogrammed period of time, and the heating elements can only be turned back on manually.
  • a preferred sensor is a motion sensor. It may be permanently attached or built in to the stove. Alternatively, the sensor may be a separate from the stove and may be connected to the stove by connector wires. The sensor, when separate from the stove may be "connected" to the timer-controller by means of radio or other electromagnetic waves .
  • sensors may be utilized instead of motion sensors.
  • human presence may be detected by judicious placement of photoelectric sensors, infra-red sensors, laser beams, or similar sensors.
  • An advantage of such sensors is that they may be adjusted with respect to the height from the ground that detection is made, in order to avoid being triggered by small children or pets.
  • Other sensors such as floor pressure pads, may be used.
  • a suitable motion sensor is an electronic device which monitors a certain area in front of the stove for human motion. If such motion is detected, the sensor generates an electric impulse.
  • the motion sensor is designed to detect human activity within an arc of about 120 degrees horizontally and about 20 degrees vertically. The typical distance for detection is up to about 5 metres. This operational range allows it to be used in most kitchens.
  • the motion sensor's design specifications allow it to be adjusted at any angle in relation to the floor surface upon which the stove stands. This would permit the sensor to detect motion at and above a specific height from the floor surface, thus avoiding detection of the motion of pets, and children not old enough to operate the stove safely.
  • the sensor e.g. motion sensor
  • the sensor may be remote from the stove.
  • the sensor must be able to communicate with the timer-controller. This may be done with an electrical connection, transmittal of a signal through house wiring, through the air, e.g. at radio or other frequency, or other known methods.
  • the timer-controller may comprise a timing relay (off delay), which is an electronic device which operates similarly to a regular relay, except that a built-in timing device delays switching off the relay for a preset period of time.
  • a timing relay off delay
  • an electric impulse sent to this timing relay (off delay) when the timing device counts down the time-delay period, causes the timing device to reset itself again to the preset period of time and countdown restarts.
  • the time-delay period can be easily set to the desired value by individual stove users according to their needs. In some embodiments it may be wise to ensure that the user-settable time does not exceed a maximum value preset according to safety considerations, for example a maximum of about 30 minutes.
  • the timing relay (off delay) is responsible for measuring time elapsed since the motion sensor last registered human activity and for controlling relays connected directly to the heating elements of the stove. If no signal, e.g. electric impulse, is received from the motion sensor during a preset time-delay period, the timing relay (off delay) disconnects electric power from other relays causing them to turn off the stove's heating elements. Relays may be present, which are responsible for making or breaking a connection in order to supply or cut off electrical power in the device's electric circuitry.
  • An optional transformer may be needed to supply the appropriate voltage to the sensor, e.g. motion sensor, if it operates on a voltage other than normally available for the stove, e.g. a voltage other than a mains voltage of 115 volts.
  • FIG. 2 shows the front of a stove 31 which has an oven 32, a drawer for pans 33, a stove top 34 with heating elements 35, and a control panel 36.
  • Control panel 36 has control knobs 37 for controlling the amount of power supplied to heating elements 35.
  • Control panel 36 also has oven control devices 38 for the oven 32.
  • the stove of the present invention has a motion sensor 40 and a timing relay 41.
  • FIG 3 is a top view of the stove of Figure 2 and shows the stove top 34 with heating elements 35a, 35b, 35c and 35d.
  • the front of the stove has a handle 42 for the door to oven 32.
  • Control panel 36 has control knobs 37, oven control devices 38, clock 39, motion sensor 40 and timing relay 41, as in Figure 2.
  • the arc over which motion sensor 40 will sense motion is shown by lines A-A-A. Typically, the angle between the lines is up to about 120 degrees.
  • Figure 4 is a side view of the stove of Figure 2.
  • the components are labelled as in Figures 2 and 3.
  • the line of sight for the lower level of detection for motion sensor 40 is shown by line B-B.
  • the motion sensor may be adjustable to alter the height of the line of sight B-B.
  • Figure 1 is a schematic representation of the electrical circuitry for one embodiment of the present invention.
  • the present invention operates in the following manner.
  • the stove's heating element is activated by turning the power knob to the ON position, the power is supplied to connection 4 and 8 of relay 51 ( Figure 1) which causes a coil to connect connectors 4 and 6 ( Figure 1) together which in turn transfers electric current to connector 11 of the timing relay (off delay) 54.
  • constantly powered connector 3 of relay 51 is connected with connector 5 of relay 51 and then electric power is transferred to transformer 56 and connector 10 of the timing relay (off delay) 54.
  • timer device gets set for a preprogrammed time period and countdown begins. Two possible events may occur:
  • the present invention may operate automatically as described hereinabove.
  • the installation of the device on a stove may allow the user other modes of operation.
  • the timer-controller may turn the heating elements off after the predetermined period of time has elapsed but not turn the heating elements on again when the sensor detects human activity, unless the timer-controller is reset manually. This is basically a fail-safe mechanism and avoids false signals from turning the heating elements on prematurely.
  • the installation may also have an over-ride to disable the safety device and allow the heating elements to be used without interruption by the safety device. This may be desirable in the event that low heat is required over a very long time.
  • the flow of gas to individual burners may be controlled by means of a solenoid valve or similar. Accordingly, the sensor and timer- controller can be used to open or close the solenoid valve in a manner similar to the shutting off or turning on of the electric heating elements in an electric stove .

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

Dispositif permettant de réduire les risques d'incendie dû au fait de faire la cuisine, sans compromettre l'utilisation pratique des cuisinières électriques. Le dispositif selon la présente invention est destiné à éteindre automatiquement les plaques d'une cuisinière électrique si personne n'utilise cette dernière pendant un laps de temps supérieur à une durée préprogrammée. Une combinaison d'un dispositif de minutage programmable et d'un capteur de mouvements est utilisée à cet effet. Le capteur de mouvements surveille tout mouvement humain à proximité de ladite cuisinière. Si le capteur détecte une absence de mouvements dans les environs immédiats de la cuisinière, le relais de minutage est activé de manière à couper l'alimentation électrique des plaques de la cuisinière, une fois écoulé un laps de temps préprogrammé. Si le capteur de mouvements détecte des mouvements humains à proximité de la cuisinière, ledit dispositif rallume les plaques de la cuisinière jusqu'à ce qu'une autre période d'absence de mouvements soit détectée et le cycle sera répété.
PCT/CA1997/000982 1996-12-20 1997-12-19 Dispositif de prevention d'incendie pour cuisiniere electrique WO1998028944A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54722/98A AU5472298A (en) 1996-12-20 1997-12-19 Fire prevention device for electric cooking stove

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA 2193533 CA2193533A1 (fr) 1996-12-20 1996-12-20 Dispositif de prevention des incendies relies a l'utilisation de cuisinieres electriques
CA2,193,533 1996-12-20

Publications (1)

Publication Number Publication Date
WO1998028944A1 true WO1998028944A1 (fr) 1998-07-02

Family

ID=4159492

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1997/000982 WO1998028944A1 (fr) 1996-12-20 1997-12-19 Dispositif de prevention d'incendie pour cuisiniere electrique

Country Status (3)

Country Link
AU (1) AU5472298A (fr)
CA (1) CA2193533A1 (fr)
WO (1) WO1998028944A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005106336A1 (fr) * 2004-04-29 2005-11-10 Athena Nordic Ab Dispositif pour l'alimentation controlee de courant a une unite a commande electrique
WO2007139521A2 (fr) * 2006-05-30 2007-12-06 Bc2222 D.O.O. Dispositif de protection pour des appareils ménagers thermiques autonomes
WO2009050117A1 (fr) 2007-10-18 2009-04-23 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager
WO2014011101A1 (fr) * 2012-07-13 2014-01-16 Sensagon Ab Dispositif et procédé permettant de réduire la température d'un dispositif de cuisson
WO2015062666A1 (fr) * 2013-11-01 2015-05-07 Arcelik Anonim Sirketi Système à table de cuisson chauffante ayant une fonction avancée de commande de sécurité de processus de cuisson
JP2016196990A (ja) * 2015-04-06 2016-11-24 三菱電機株式会社 加熱調理器
US9959728B2 (en) 2015-06-04 2018-05-01 International Business Machines Corporation Managing a smart appliance with a mobile device
EP2174065B1 (fr) * 2007-06-27 2019-02-13 BSH Hausgeräte GmbH Appareil chauffant avec circuit de surveillance de temps
US11328582B1 (en) 2021-07-07 2022-05-10 T-Mobile Usa, Inc. Enhanced hazard detection device configured with security and communications capabilities

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2661514A1 (fr) 2009-04-20 2010-10-20 Birendra K. Mishra Appareillage de prevention des incendies firevoider
US9928672B2 (en) 2013-12-05 2018-03-27 Wallflower Labs Inc. System and method of monitoring and controlling appliances and powered devices using radio-enabled proximity sensing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4775913A (en) * 1987-09-02 1988-10-04 Ekblad Carl A Safety shutoff device for a stove
JPH02279925A (ja) * 1989-04-18 1990-11-15 Matsushita Electric Ind Co Ltd 電気加熱調理器の温度過昇防止装置
US5380985A (en) * 1994-01-06 1995-01-10 Graham; Larry J. Presence delector for controlling an electric range
CA2152015A1 (fr) * 1995-06-12 1996-12-17 Alain Vaillancourt Dispositif de securite pour appareil a elements chauffants

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4775913A (en) * 1987-09-02 1988-10-04 Ekblad Carl A Safety shutoff device for a stove
JPH02279925A (ja) * 1989-04-18 1990-11-15 Matsushita Electric Ind Co Ltd 電気加熱調理器の温度過昇防止装置
US5380985A (en) * 1994-01-06 1995-01-10 Graham; Larry J. Presence delector for controlling an electric range
CA2152015A1 (fr) * 1995-06-12 1996-12-17 Alain Vaillancourt Dispositif de securite pour appareil a elements chauffants

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 042 (M - 1076) 31 January 1991 (1991-01-31) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005106336A1 (fr) * 2004-04-29 2005-11-10 Athena Nordic Ab Dispositif pour l'alimentation controlee de courant a une unite a commande electrique
WO2007139521A2 (fr) * 2006-05-30 2007-12-06 Bc2222 D.O.O. Dispositif de protection pour des appareils ménagers thermiques autonomes
WO2007139521A3 (fr) * 2006-05-30 2008-05-15 Bc2222 D O O Dispositif de protection pour des appareils ménagers thermiques autonomes
EP2174065B1 (fr) * 2007-06-27 2019-02-13 BSH Hausgeräte GmbH Appareil chauffant avec circuit de surveillance de temps
WO2009050117A1 (fr) 2007-10-18 2009-04-23 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager
WO2014011101A1 (fr) * 2012-07-13 2014-01-16 Sensagon Ab Dispositif et procédé permettant de réduire la température d'un dispositif de cuisson
WO2015062666A1 (fr) * 2013-11-01 2015-05-07 Arcelik Anonim Sirketi Système à table de cuisson chauffante ayant une fonction avancée de commande de sécurité de processus de cuisson
JP2016196990A (ja) * 2015-04-06 2016-11-24 三菱電機株式会社 加熱調理器
US9959728B2 (en) 2015-06-04 2018-05-01 International Business Machines Corporation Managing a smart appliance with a mobile device
US11328582B1 (en) 2021-07-07 2022-05-10 T-Mobile Usa, Inc. Enhanced hazard detection device configured with security and communications capabilities

Also Published As

Publication number Publication date
CA2193533A1 (fr) 1998-06-20
AU5472298A (en) 1998-07-17

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