EP2771620A1 - Brûleur à gaz destiné à un foyer de cuisson et muni d'un système de détection des récipients - Google Patents

Brûleur à gaz destiné à un foyer de cuisson et muni d'un système de détection des récipients

Info

Publication number
EP2771620A1
EP2771620A1 EP12798845.9A EP12798845A EP2771620A1 EP 2771620 A1 EP2771620 A1 EP 2771620A1 EP 12798845 A EP12798845 A EP 12798845A EP 2771620 A1 EP2771620 A1 EP 2771620A1
Authority
EP
European Patent Office
Prior art keywords
burner
container
magnet
detector
gas supply
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
EP12798845.9A
Other languages
German (de)
English (en)
Other versions
EP2771620B1 (fr
Inventor
Jean-Marc Brun
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.)
Thirode Grandes Cuisines Poligny SAS
Original Assignee
Thirode Grandes Cuisines Poligny SAS
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 Thirode Grandes Cuisines Poligny SAS filed Critical Thirode Grandes Cuisines Poligny SAS
Publication of EP2771620A1 publication Critical patent/EP2771620A1/fr
Application granted granted Critical
Publication of EP2771620B1 publication Critical patent/EP2771620B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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

  • the present invention relates to a gas burner of a cooking table or hob, provided with a container detecting system, the aim of which is to provide for supplying the burner with gas when the container is put in a cooking position on the hob, above the burner, and, vice versa, to cut off the gas supply when the container is not on the hob.
  • the word container means any cooking means able to contain foods and/or liquids to be heated, of the saucepan, frying pan, pot, casserole etc., type made in any appropriate, whether coated or not, material (steel, cast iron, copper, aluminium, ...) .
  • hobs provided with burners having a container detecting system are used in professional catering, that is both commercial and collective, for preventing a continuous or nearly continuous use of burners in an open position (high heat) upon operation, when no container is present on the burners. Indeed, it is estimated that the high heat only operates during 30% of the time with a container on the burner.
  • the systems currently on the market implement either a mechanical detection by the weight of the container operating a contact, by means of a return mechanism and axes, or an electric, ohmic detection using the conduction of the container for closing an electronic contact connected with the gas supply of the burners.
  • the electric signal delivered by the contacts of such systems is sent to a solenoid valve acting on the gas supply of the burners, when the presence of the container on the hob, above the burner, is detected.
  • the ohmic detection system does not operate when containers are externally coated with a coating such as enamel, or even with a cumulated non conductive dirt layer.
  • the present invention aims at overcoming such drawbacks and relates to a gas burner provided with a container detecting system, wherein the design of the system is novel, simple and reliable, while providing, more specifically, an easy assembling/- dismantling operation and a full independence from the nature of the material of the containers.
  • the gas burner of this invention with a container detecting system to be used for enabling or disrupting the gas supply of the burner by the presence or the absence of the container ,
  • said detection system is of the magnetic type and comprises:
  • a moving magnet being connected to said burner and arranged for being able to be moved by the container when the latter is put in a cooking position
  • a magnetic detector arranged on the hob for detecting the movement of the magnet by the container and for enabling the gas supply of the burner .
  • the presence of the container is detected magnetically by a simple move of the magnet, the magnetic field of which actuates the magnetic detector which, in turn, allows for the opening of the gas supply of the burner.
  • the magnet and the detector are independent from each other, this results in extremely easy and quick assembling/dismantling operations helping to facilitate the cleaning.
  • said magnet and said magnetic detector of the detection system are substantially aligned according to the vertical axis of said burner, said magnet being mounted slidingly with respect to said burner, whereas said detector being integral with the hob is located under said burner.
  • a system is achieved operating through a simple translation, in the present case the sliding of the magnet as a result of the contact of the container in a cooking position on the hob, having led to the magnet getting closer in the direction of the detector and thus the variation of the magnetic field.
  • This variation involves, at the level of the gas control of the specific burner, the gas supply of the latter. And moving the magnet apart as a result of the container being removed leads to the supply being cut off through the inverse variation of the magnetic field .
  • said moving magnet of the detection system is linked to a pusher able to receive said container and mounted slidably in a casing of a support fastened to said burner, a return resilient means in the position of said pusher with respect to the support being provided in the casing.
  • said pusher has the shape of a stem ending, on the upper side, with a flattened conical head arranged so as to receive said container, and wherein, on the lower side, a bore is arranged for receiving said magnet.
  • the magnetic detector of the system could be a flexible blade switch, for establishing the electric connection with the gas supply of the burner when the detector is submitted to the variation of the magnetic field as a result of the magnet being brought closer under the weight of the container.
  • a structurally simple and reliable choice provides for the operating reliability upon use.
  • a means for adjusting its position with respect to the magnet.
  • said controlling means comprises a micrometric screw mounted on a stationary support of the detector and acting on the latter against a return resilient means.
  • an electric connection is provided between the magnetic detector and a solenoid valve controller controlling the gas supply of the burner.
  • This invention also relates to a hob comprising at least one gas burner with which there is associated a system for detecting a container.
  • said detection system is such as defined above.
  • FIGS. of the appended drawing will better explain how this invention can be implemented.
  • FIG. 1 is a partial perspective view of an embodiment of a hob having each represented gas burner being provided with a container detection system according to this invention.
  • FIG. 2 is a sectional and enlarged perspective view of one of the burners with its detection system.
  • FIG. 3 shows in a longitudinal section, the burner with the detection system in its two positions, respectively in the absence and in presence of a container .
  • the hob 1 comprises, in the illustrated embodiment, two gas burners 2, 3 provided with a container detecting system 4. A different number of burners is obviously possible.
  • This hob 1 usually has the shape of a parallelepipedic tray with a bottom 5, side walls 6 and an upper part 7 with an aperture 8 on the circumference of which a grid 9 is arranged being able to receive the cooking means such as the container R illustrated in mixed line on FIG . 3.
  • the two burners 2, 3 are arranged, respectively in the front and in the rear with respect to the exterior side wall 6 of the hob 1, and supplied with gas by individual delivery ducts 10 connected to the cylindrical pots 11 of a vertical longitudinal axis A of the burners, only the duct 10 of the rear burner being shown on FIG. 1.
  • a safety/ignition assembly 12 is furthermore associated, comprising more specifically a pilot light, a thermocouple and an ignition electrode and on which lies, through non shown complementary fastening means, the side skirt of the cylindrical pot 11 of the corresponding burner.
  • a safety/ignition assembly 12 will not be further detailed, and could be, for information, that described in European patent 1,225,394 in the name of the Applicant.
  • the gas delivery duct 10 can be seen in the direction of the burner 2, which duct is on one side, fastened to the corresponding side wall 6 of the hob with screws and, on the other side, to the cylindrical pot 11 of the burner.
  • a jet 13 is arranged being connected to the gas supply controlled by a solenoid valve controller 14 being schematically shown in the shape of a rectangular pad on FIG. 3.
  • the container detection system 4 on its respective burner, such as the burner 2 on FIGS. 2 and 3, is according to this invention of the magnetic type and comprises, to this end, two main components, that is a magnet 15 and a detector 16.
  • the magnet 15 is associated with the burner 2, whereas the detector 16 is integral with the hob 1, in particular the bottom 5 thereof .
  • the magnet 15 is made movable with respect to the burner so that the variation of the magnetic field, generated by the movement of the magnet, is noticed by the detector 16.
  • the movement of the magnet 15 is sliding and is achieved by a pusher 17 with which the magnet 15 is associated and being mounted slidably in a tubular shaped support 18 fastened to the pot 11 of the burner.
  • the thus assembled pusher and support as an actuator are of a cylindrical shape and are arranged at the centre of the burner 2, substantially in the vertical longitudinal axis A of the cylindrical pot 11.
  • the pusher 17 comprises a stem 19 mounted slidably in a casing or an axial passage 20 of the support 18, and ending in a flattened conical head 21.
  • This projects from the grid 9 by an appropriate distance D, so as to act as a contact with the container when the latter is positioned on the grid, as will be further detailed later on.
  • the stem 19 is drilled with a bore 22 inside of which the magnet 15 is integrally received.
  • the support 18 of the pusher and therefore of the magnet 15 is immobilized by a fastening member 23, such as a recessed nut, in a transversal base 24 integral with the cylindrical pot 11.
  • the support 18 therefore stands vertically in the axis A of the burner 2, while crossing it throughout its length with the flattened conical head 21 projecting from the grid 9.
  • a return resilient means 26 is provided, such as a helical spring, acting so as to spontaneously returning the pusher in an outlet position as soon as a container is removed from the grid, with its flattened head 21 located above the grid 9 by the desired distance D.
  • the magnetic detector 16 is, as far as it is concerned, aligned substantially under the «magnet 15 pusher 17 - support 18» assembly and is arranged in an axial casing 28 of a stationary support 29, in the shape of a tubular foot.
  • This foot 29 is fastened perpendicularly to the bottom 5 with one, lower, of its ends.
  • the support foot is not strictly vertical and aligned with the pusher according to the axis A, as shown on the FIGS.
  • a protective plug 30 covering a micrometric screw 31 to be screwed on such upper end and acting, for setting purposes, against the detector 16.
  • the latter is a flexible blade switch of the Reed bulb type, more specifically selected for its operating reliability, its resistance to high temperatures and its low cost.
  • an electric connection 32 goes out of the detector 16 in the passage 28 of the tubular foot 29, then crosses the bottom 5 so as to be connected to the solenoid valve controller designated in 14 by the rectangle and connected to the inlet of the delivery duct 10 with the jet 13 so as to allow for the gas supply in the latter.
  • a return resilient means 33 is arranged, such as a helical spring, constantly acting on the detector so as to maintain it against the adjusting screw 31.
  • the spacing distance could be accurately adjusted between the magnet 15 and the detector 16 as desired so as to determine the variation of the magnetic field value necessary for triggering the gas supply of the burner.
  • the micrometric screw 31 allows such a function
  • the flattened head 21 of the pusher 17 externally protrudes from the grid, by the predetermined distance D, under the action of the spring 26 placing in abutment the shoulder 25 of the pusher against an internal shoulder 34 arranged in the axial passage 20 of the support 18.
  • the magnet 15 integral with the pusher is spaced apart from the detector 16 by a distance Dl for which the magnetic field generated by the magnet will have no effect on the magnetic detector. Thereby, no signal is sent by the link 32 to the controller 14, corresponding to the gas supply being cut off in the direction of the relevant duct 10 of the burner 2.
  • the pusher 17 is spontaneously returned in the high outlet position, with its head 21 projecting from the grid 9, by the helical spring 26 resulting in the magnet 15 being spaced apart from the detector 16 with a decrease of the magnetic field, and the simultaneous cut off of the gas supply of the burner 2.
  • such a burner with a magnetic system for detecting a container allows, in addition to limiting the energy consumption to the single presence of a container on the hob, to be insensitive to the electric conductive value of the container being used, easy to assemble/dismantle and to clean through the composition of the system into two main independent components (magnet pusher - detector) , robust upon use, without making use of seals and of a low cost.
  • the system is particularly tolerant to geometry deviations, such as angle or position deviations .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

L'invention concerne un brûleur à gaz destiné à un foyer de cuisson et muni d'un système de détection des récipients. Le brûleur à gaz est caractérisé en ce que ledit système de détection (4), destiné à activer ou à interrompre l'alimentation en gaz du brûleur en cas de présence ou d'absence d'un récipient, est de type magnétique et comprend : un aimant mobile (15) relié audit brûleur et conçu pour être déplacé par le récipient lorsque ce dernier est placé dans une position de cuisson ; et un détecteur magnétique (16) agencé sur le foyer, et qui détecte le déplacement de l'aimant provoqué par le récipient et active l'alimentation en gaz du brûleur.
EP12798845.9A 2011-10-24 2012-10-22 Brûleur à gaz destiné à un foyer de cuisson et muni d'un système de détection des récipients Active EP2771620B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1159621A FR2981734B1 (fr) 2011-10-24 2011-10-24 Bruleur a gaz de table de cuisson, a systeme de detection d'un recipient
PCT/IB2012/055803 WO2013061241A1 (fr) 2011-10-24 2012-10-22 Brûleur à gaz destiné à un foyer de cuisson et muni d'un système de détection des récipients

Publications (2)

Publication Number Publication Date
EP2771620A1 true EP2771620A1 (fr) 2014-09-03
EP2771620B1 EP2771620B1 (fr) 2019-03-27

Family

ID=47326243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12798845.9A Active EP2771620B1 (fr) 2011-10-24 2012-10-22 Brûleur à gaz destiné à un foyer de cuisson et muni d'un système de détection des récipients

Country Status (4)

Country Link
EP (1) EP2771620B1 (fr)
ES (1) ES2730714T3 (fr)
FR (1) FR2981734B1 (fr)
WO (1) WO2013061241A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2537273B1 (es) * 2013-12-04 2016-03-23 Bsh Electrodomésticos España, S.A. Dispositivo de campo de cocción a gas
US11357080B2 (en) * 2019-09-30 2022-06-07 Midea Group Co., Ltd. Cooking container sensing for ignition triggering and programmed cooking

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL120772A0 (en) * 1997-05-04 1997-09-30 White Jason Gas-saving arrangements for gas ranges
FR2819581B1 (fr) 2001-01-18 2003-08-22 Thirode Grandes Cuisines Poligny Dispositif de support et de positionnement d'un bruleur a gaz dans un appareil de cuisson
JP2006118817A (ja) * 2004-10-25 2006-05-11 Matsushita Electric Ind Co Ltd 加熱調理器
JP2006300342A (ja) * 2005-04-15 2006-11-02 Matsushita Electric Ind Co Ltd 燃焼加熱調理器
JP2007218524A (ja) * 2006-02-17 2007-08-30 Tateyama Kagaku Kogyo Kk ガステーブル用センサ
JP2007333262A (ja) * 2006-06-13 2007-12-27 Nec Tokin Corp 被加熱容器検知機構およびそれを用いたコンロ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013061241A1 *

Also Published As

Publication number Publication date
FR2981734A1 (fr) 2013-04-26
EP2771620B1 (fr) 2019-03-27
WO2013061241A1 (fr) 2013-05-02
ES2730714T3 (es) 2019-11-12
FR2981734B1 (fr) 2015-01-02

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