EP0715126A1 - Vorrichtung zum automatischen Anzünden oder Auslöschen eines Kochplattengasbrenners in Abhängigkeit der Anwesenheit eines Kochtopfes auf diesem Brenner - Google Patents

Vorrichtung zum automatischen Anzünden oder Auslöschen eines Kochplattengasbrenners in Abhängigkeit der Anwesenheit eines Kochtopfes auf diesem Brenner Download PDF

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Publication number
EP0715126A1
EP0715126A1 EP95118177A EP95118177A EP0715126A1 EP 0715126 A1 EP0715126 A1 EP 0715126A1 EP 95118177 A EP95118177 A EP 95118177A EP 95118177 A EP95118177 A EP 95118177A EP 0715126 A1 EP0715126 A1 EP 0715126A1
Authority
EP
European Patent Office
Prior art keywords
burner
container
activation
valve member
emitter
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.)
Withdrawn
Application number
EP95118177A
Other languages
English (en)
French (fr)
Inventor
Alessandro c/o Whirlpool Europe s.r.l. Distaso
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.)
Whirlpool Europe BV
Original Assignee
Whirlpool Europe BV
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 Whirlpool Europe BV filed Critical Whirlpool Europe BV
Publication of EP0715126A1 publication Critical patent/EP0715126A1/de
Withdrawn legal-status Critical Current

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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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/683—Plates having their feeding circuit closed as the kettles, pans or the like are put on
    • 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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges

Definitions

  • This invention relates to a device for automatically governing the feed of gas to a burner of a cooking hob on the basis of the presence of a food container on said burner, comprising means for generating a sensing signal arranged to explore the space adjacent to the burner, detection means for said signal which receive this latter when reflected by a food container placed on the burner, and control means connected to said generator means and detector means and to a valve member positioned in a gas feed conduit connected to the body of said burner.
  • a cooking hob provided with the above kind of device is disclosed in DE-A-3619762. Said cooking hob presents a food container detector radially spaced from the gas burner; the cooking plate has to be provided with a corresponding seat and the light emitter and receiver are quite easily soiled.
  • the cooking hobs normally comprise usual flame detection means associated with each burner and arranged to interrupt gas flow to this latter if flame is lacking after activating the burner.
  • each burner is activated by operating (often simultaneously) the corresponding knob and the spark generator element if provided.
  • Arrangements are known in which said spark generator is activated by operating the knob.
  • Such arrangements however enable a burner to be activated even if a food container is not positioned on it, in which case the user can also activate a burner which it is not required to operate, so that it has to be deactivated and the operation of activating the required burner repeated.
  • safety problems can also arise, for example when the burner activated in error is close to a part of the user's body.
  • the known arrangements enable a burner to remain active even if the food container is removed from it, this being dangerous for a careless user.
  • An object of the invention is to provide a device of the type mentioned at the beginning of the description, which is simple, reliable and can be easily adapted to the known cooking hobs.
  • Another object of the invention is to provide a device which allows a gas burner to be activated or ignited by simply placing a food container on it, and which therefore enables said burner to be activated only when a container is located on it.
  • a further object of the invention is to provide a device of the stated type which also acts as a further safety member for a gas cooking hob and which also results in the extinguishing of a burner (or the cessation of gas flow to it) when the saucepan is removed from it, this being achieved without reducing the efficiency and functionality of other safety elements with which the cooking hob is already provided.
  • a cooking hob is indicated overall by 1 and comprises, in the example, four gas burners 2 of different dimensions with which there are associated usual grids 3 for supporting food containers 4 (of which one is shown in Figure 1) of different sizes. With each burner there corresponds a knob 5 for its activation or deactivation.
  • the four burner knobs 5 (arranged in the example in proximity to one side of the cooking hob 1) each cooperate via their own connection shaft 6 with a usual valve member 7 positioned in a conduit 8 which feeds gas to the corresponding burner.
  • this latter comprises, connected to the conduit 8, a substantially cup-shaped body 10 in proximity to which there are positioned a usual spark generator 12 and a usual flame detector 13; this latter is connected to and controls a usual valve member 14 positioned in the gas feed conduit 8 upstream of the member or valve 7 on which the knob acts.
  • a flame divider 16 shown exploded in Figure 2 in its various component parts
  • a preferably glass ceramic cap 16A is located.
  • Other materials can be used for the cap 16A, but they have to be transparent to the signals emitted by the emitter and received by the receiver, as it will be described hereafter.
  • the upper portion 16B of the flame divider 16 comprises a central hole 16C, a lower part 16D of said flame divider being cup-shaped and comprising a central through hole 16E.
  • each burner 2 there is connected a device for automatically governing its activation or deactivation on the basis of the presence of the food container 4 on the corresponding grid 3.
  • a discoidal element 21 supporting two members 22 and 23 which rise perpendicular thereto to be located in corresponding seats 25 and 26 formed in a cylindrical or frusto-conical portion 27 rising from the inner base of said burner body 10.
  • the element 21 is positioned below the body 10 and is associated with it in any known manner.
  • the members 22 and 23 are light emitter and a light receiver respectively.
  • the wavelength of this light is suitably chosen so that there is no possibility of interference between the light emitted by the flame and the heat emitted by the flame divider, and the light signal emitted by the emitter 22.
  • an infrared light emitter and an infrared light receiver are used.
  • the infrared light can be replaced by a different electromagnetic signal having a wavelength which does not overlap with that of the flame or of the heat emitted or generated by the flame divider.
  • the members 22 and 23 are connected to a control unit 33 which powers them and which is also connected to the spark generator element 12.
  • This unit is connected to the valve member 14 and can cause it to open and close in series with the command from the flame detector 13 (for safety reasons).
  • a sensor 34 is also connected to the unit 33 to sense the movement of the knob 5, i.e. its shifting from a position in which it does not allow the burner 2 to be activated or causes it to be extinguished ("0" position) to a position in which it allows this activation (position "1" or "1/2") at different flame powers.
  • This sensor is of known type, for example comprising a lever associated with the shaft 6, or is of optical type (as in the example) cooperating with a visual reference marker 35 associated with the shaft 6.
  • the device of the invention is used as follows. In the absence of a food container on the grid 3 associated with the burner 2, the signal emitted by the emitter 22 (sensing signal which explores the space above the burner or the space immediately adjacent to the cap 16A) is lost in space. In other words, the emitter 22 emits an infrared signal which, preferably collimated by the seat 25 in which it is positioned, passes through the holes 16E and 16C in the components of the flame divider 16 and reaches the cap 16A. The signal passes through this and above the burner 2. If the container 4 is absent this signal is lost in space. If the container is present it is reflected and received by the receiver 23 which generates an electrical signal fed to the unit 33 (which is preferably a microprocessor circuit).
  • the unit 33 which is preferably a microprocessor circuit
  • the unit 33 activates the spark generator 12 for a determined time in any known manner and allows the valve 14 to open.
  • the gas which hence reaches the burner body 10 can reach the flame divider 16 and ignite thereat.
  • the burner is hence active.
  • the unit 33 therefore acts on the valve member 14 to close it. In this manner gas feed to the burner ceases and this becomes deactivated.
  • the emitter 22 emits an infrared signal.
  • other exploring signals can be emitted such as a radiofrequency signal etc.
  • the receiver 23 is therefore chosen on the basis of the type of emitter used.
  • the unit 33 is advantageously connected to a light- emitting indicator 39 positioned at each knob 5 and arranged to generate a warning signal when the corresponding burner 2 is deactivated or extinguished (when the container 4 is removed from the grid 3) and the corresponding knob remains in the position corresponding to burner activation; in this case an acoustic warning device 38 can also be activated. In this manner the user is warned of the need to return the knob to the "0" position. Only when this is detected by the sensor 34 does the unit 33 close the valve member 14 to allow subsequent operation of the burner 2.
  • the action of the unit 33 on the valve 14 when the container 4 is removed from the burner 2 can either be immediate or can occur after a predefined time which can be as small as desired. Alternatively, said action can be such as to firstly reduce the gas flow to the burner 2 (so as to limit the flame power) and only then completely close the valve 14.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
EP95118177A 1994-12-01 1995-11-18 Vorrichtung zum automatischen Anzünden oder Auslöschen eines Kochplattengasbrenners in Abhängigkeit der Anwesenheit eines Kochtopfes auf diesem Brenner Withdrawn EP0715126A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI942443 1994-12-01
IT94MI002443A IT1275680B1 (it) 1994-12-01 1994-12-01 Dispositivo per la gestione automatica dell'attivazione o spegnimento di un bruciatore a gas di un piano di cottura in funzione

Publications (1)

Publication Number Publication Date
EP0715126A1 true EP0715126A1 (de) 1996-06-05

Family

ID=11369949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118177A Withdrawn EP0715126A1 (de) 1994-12-01 1995-11-18 Vorrichtung zum automatischen Anzünden oder Auslöschen eines Kochplattengasbrenners in Abhängigkeit der Anwesenheit eines Kochtopfes auf diesem Brenner

Country Status (2)

Country Link
EP (1) EP0715126A1 (de)
IT (1) IT1275680B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998050736A1 (en) * 1997-05-04 1998-11-12 Jason White Gas-saving arrangements for gas-fired cooking equipment
WO2006030376A1 (en) * 2004-09-15 2006-03-23 Antonie Johannes Opperman Heating apparatus
WO2014090432A1 (en) * 2012-12-13 2014-06-19 Coprecitec, S.L. Gas cooking appliance
WO2016181191A1 (en) * 2015-05-12 2016-11-17 Yougreen Limited Gas burner safety device, system and alarm

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2260112A1 (de) * 1974-02-05 1975-08-29 Matsushita Electric Ind Co Ltd
FR2465163A1 (fr) * 1979-09-14 1981-03-20 Doucy Daniel Dispositifs economiseurs d'energie pour foyers de cuisson professionnels a gaz ou electriques
US4446455A (en) * 1981-02-27 1984-05-01 Nashawaty Ralph G Stove alarm system
US4681084A (en) * 1985-05-28 1987-07-21 George Catsouras Burner control system
DE3619762A1 (de) 1986-06-12 1987-12-23 Licentia Gmbh Topferkennung
FR2645660A1 (fr) * 1989-04-06 1990-10-12 Gatineau Jacques Procede de commande d'appareils de traitement, notamment de cuisson, et dispositif pour la mise en oeuvre du procede

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2260112A1 (de) * 1974-02-05 1975-08-29 Matsushita Electric Ind Co Ltd
FR2465163A1 (fr) * 1979-09-14 1981-03-20 Doucy Daniel Dispositifs economiseurs d'energie pour foyers de cuisson professionnels a gaz ou electriques
US4446455A (en) * 1981-02-27 1984-05-01 Nashawaty Ralph G Stove alarm system
US4681084A (en) * 1985-05-28 1987-07-21 George Catsouras Burner control system
DE3619762A1 (de) 1986-06-12 1987-12-23 Licentia Gmbh Topferkennung
FR2645660A1 (fr) * 1989-04-06 1990-10-12 Gatineau Jacques Procede de commande d'appareils de traitement, notamment de cuisson, et dispositif pour la mise en oeuvre du procede

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998050736A1 (en) * 1997-05-04 1998-11-12 Jason White Gas-saving arrangements for gas-fired cooking equipment
WO2006030376A1 (en) * 2004-09-15 2006-03-23 Antonie Johannes Opperman Heating apparatus
WO2014090432A1 (en) * 2012-12-13 2014-06-19 Coprecitec, S.L. Gas cooking appliance
US10022014B2 (en) 2012-12-13 2018-07-17 Copreci, S. Coop. Gas cooking appliance
WO2016181191A1 (en) * 2015-05-12 2016-11-17 Yougreen Limited Gas burner safety device, system and alarm

Also Published As

Publication number Publication date
ITMI942443A1 (it) 1996-06-01
IT1275680B1 (it) 1997-10-17
ITMI942443A0 (it) 1994-12-01

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