EP0081470A1 - Dispositif de chauffage comprenant un brûleur avec une veilleuse - Google Patents

Dispositif de chauffage comprenant un brûleur avec une veilleuse Download PDF

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Publication number
EP0081470A1
EP0081470A1 EP82850228A EP82850228A EP0081470A1 EP 0081470 A1 EP0081470 A1 EP 0081470A1 EP 82850228 A EP82850228 A EP 82850228A EP 82850228 A EP82850228 A EP 82850228A EP 0081470 A1 EP0081470 A1 EP 0081470A1
Authority
EP
European Patent Office
Prior art keywords
burner
venturi tube
pilot
mixing chamber
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.)
Ceased
Application number
EP82850228A
Other languages
German (de)
English (en)
Inventor
Jean-François Monteil
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.)
Usines & Fonderies Arthur Martin Sa
Original Assignee
Usines & Fonderies Arthur Martin Sa
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 Usines & Fonderies Arthur Martin Sa filed Critical Usines & Fonderies Arthur Martin Sa
Publication of EP0081470A1 publication Critical patent/EP0081470A1/fr
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/22—Systems for controlling combustion with a time programme acting through mechanical means, e.g. using cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/10—Sequential burner running
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/22—Pilot burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/36—Spark ignition, e.g. by means of a high voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/06—Fail safe for flame failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples

Definitions

  • the present invention relates to a heating arrangement in accordance with the preamble of the appending claim 1.
  • a burner which is connected to a manifold via a gas valve operated by a control device to alternately open and cut off the gas supply to the burner at predetermined intervals.
  • the control device comprises a cam disc which is rotated by an electric motor.
  • the cam disc is provided with a cam surface which co-operates with an operating member on the gas valve to open the said valve and to close it, respectively.
  • Another cam surface on the cam disc co-operates with a spark generating device which includes an igniter positioned close to the burner.
  • the burner referred to When operating intermittently, the burner referred to is repeatedly ignited by sparks and some time before the activation of the spark generating device, the gas valve has to be opened. Hence, a small amount of unburnt gas will be emitted each time the burner changes from its extinguished into its lit condition. If the burner is operated intermittently for a long time, gas may accumulate and contaminate the surrounding atmosphere which at least may cause an unpleasant smell.
  • thermocouple to be heated by the burner flames to keep a security valve open, the said security valve cutting off the gas supply if the burner should blow out and remain extinguished for a predetermined time.
  • the extinguished burner has to be re-ignited before the EMF of the thermocouple has dropped below a predetermined level at which the security valve will cut off the gas supply. Accordingly, the period of extinguished burner will be dependent on the characteristics of the thermocouple and with the thermocouples available on the market the useful range of possible heating settings will be limited.
  • the primary object of the invention is to eliminate the drawbacks indicated above and to provide a heating arrangement with a burner which can be operated intermittently without emitting any noisy sparks and without the limitation caused by the short drop-out time for the EMF of the thermocouple.
  • the object will be achieved in a heating arrangement comprising a burner having the characterizing features of claim 1.
  • a burner generally denoted by 10, comprises a venturi tube 11, and a burner head 12 which comprises a collar 13 and a top cover 56.
  • the collar rests loosely on a flange 14 on the venturi tube and the top cover 56 rests on the collar. Openings 15 are provided in the burner head for main flames and in a conventional way openings 16 are provided for main flame supporting pilot flames.
  • the burner head also comprises a mixing chamber 17, part of which is delimited by a horizontal wall 18 on the collar 13.
  • the venturi tube 11 is supplied with gas from an injector 19 terminating a gas conduit 20 which is connected to a manifold 21 via a cock 22 operated by a knob 23.
  • a mechancally operated gas valve 24 is disposed in the conduit 20 to make possible the intermittent operation of the burner 10.
  • a control device 25 is provided wherein a cam disc 26 has a cam surface 27 acting upon a microswitch 28 which operates the valve 24.
  • the cam disc 26 is rotated by an electric motor 29 and the design of the cam surface 27 determines the periods during which the valve 24 is open and closed, respectively.
  • the motor is connected to a power supply via a terminal block 30 having terminals 31, 32.
  • a first motor terminal 33 is connected to the terminal 32 via a conductor 34 and a second motor terminal 35 is connected to the terminal 31 via a conductor 36, a microswitch 37 and a conductor 38.
  • the motor terminal 35 is also connected to the terminal 31 via a conductor 39, a push-button operated switch 40 and a conductor 41.
  • the microswitch 37 has an actuating member 42 which co-operates with an additional cam surface 43 on the cam disc 26, the said additional surface including a projection 44.
  • the cock 22 has an integrated solenoid operated valve 45 which is controlled by a thermocouple 46 positioned adjacent to the burner so as to be heated by the flames.
  • a thermocouple 46 When the thermocouple is heated, an EMF is generated which will keep the solenoid valve 45 open. If the burner should blow out or if the gas supply for some other reason should be cut off for a period exceeding a predetermined time, the EMF will drop below the holding level and the valve 45 will close and permanently cut off the gas supply.
  • An electric igniter 47 in the shape of a spark plug, is provided for initial igniting of the burner or for re-igniting in case the burner has been extinguished due to operation of the solenoid valve 45.
  • pilot flames formed by three pilot ports 48 which are equally distributed along the periphery of the burner.
  • Each port 48 is connected to a central mixing chamber 49 in the top cover 56 via a channel 50 having an inlet operning 51 of reduced cross-section.
  • the mixing chamber is supplied with an air/gas mixture by a separate venturi tube 52 which is fed by an injector 53 terminating a conduit 54 which is connected to the cock 22.
  • the pilot flames from the ports 48 are used exclusively for lighting purposes and must not cause any significant heating of a cooking vessel during periods of extinguished burner.
  • the top cover 56 is provided with a peripheral flange 55 that extends beyond the port 48 a distance corresponding at least to the length of the pilot flames. Moreover, the upper part of the top cover has a thickness selected to have the burner head taking up the energy transferred to it by the pilot flames.
  • the burner described above functions in the following way.
  • the knob 23 In order to activate the burner 10 the knob 23 is rotated to a position setting the cock 22 for a predetermined gas flow.
  • the series connected valve 45 also has to be opened to allow gas to pass the cock 22.
  • pushing of the knob 23 operates mechanically the valve 45 into its open position.
  • a cock of the design described having a thermocouple operated security valve is available on the market and will not be described in detail.
  • a push-button is operated to activate the igniter 47 to emit sparks to ignite the gas flowing through the ports 15, 16 and 48 in the burner head 12.
  • thermocouple As soon as the thermocouple has been warmed up by the flames from the burner, usually after a period of between 4 and 6 seconds, the knob 23 may be released and the voltage required for keeping the solenoid valve 45 activated will be generated by the thermocouple. This initial procedure is the same should the burner be set for continuous or for intermittent operation.
  • thermocouple is positioned to be heated by a pilot flame from a port 48 which will give the advantage of the on/off time periods to be independent of the fall time of the EMF generated by the thermocouple 46.
EP82850228A 1981-12-04 1982-11-11 Dispositif de chauffage comprenant un brûleur avec une veilleuse Ceased EP0081470A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8122737 1981-12-04
FR8122737A FR2517809A1 (fr) 1981-12-04 1981-12-04 Dispositif chauffant a bruleur et flamme pilote

Publications (1)

Publication Number Publication Date
EP0081470A1 true EP0081470A1 (fr) 1983-06-15

Family

ID=9264684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82850228A Ceased EP0081470A1 (fr) 1981-12-04 1982-11-11 Dispositif de chauffage comprenant un brûleur avec une veilleuse

Country Status (2)

Country Link
EP (1) EP0081470A1 (fr)
FR (1) FR2517809A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19905198A1 (de) * 1999-02-09 2000-08-10 Agt Gas Technology Gmbh Kochstelle für Gasherde

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE306213C (fr) *
DE335942C (de) * 1919-05-27 1921-04-19 Patent Grudeofen Fabrik Walter Gasheizbrenner mit zwei oder mehreren Flammenkraenzen und gemeinsamer oder getrennter Gaszufuehrung
DE524547C (de) * 1929-11-05 1931-05-08 Vosswerke Akt Ges Doppelsparbrenner
DE580338C (de) * 1929-12-12 1933-07-08 Jan Hendrik Windemueller Gasbrenner
FR783565A (fr) * 1933-12-07 1935-07-16 Brûleur à gaz
US2499707A (en) * 1944-08-05 1950-03-07 Southern California Gas Co Gas range top grate and burner
DE1251490B (fr) * 1967-10-05
FR2418910A1 (fr) * 1978-03-03 1979-09-28 Electrolux Ab Dispositif de commande de l'alimentation d'un bruleur a gaz

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE306213C (fr) *
DE1251490B (fr) * 1967-10-05
DE335942C (de) * 1919-05-27 1921-04-19 Patent Grudeofen Fabrik Walter Gasheizbrenner mit zwei oder mehreren Flammenkraenzen und gemeinsamer oder getrennter Gaszufuehrung
DE524547C (de) * 1929-11-05 1931-05-08 Vosswerke Akt Ges Doppelsparbrenner
DE580338C (de) * 1929-12-12 1933-07-08 Jan Hendrik Windemueller Gasbrenner
FR783565A (fr) * 1933-12-07 1935-07-16 Brûleur à gaz
US2499707A (en) * 1944-08-05 1950-03-07 Southern California Gas Co Gas range top grate and burner
FR2418910A1 (fr) * 1978-03-03 1979-09-28 Electrolux Ab Dispositif de commande de l'alimentation d'un bruleur a gaz

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19905198A1 (de) * 1999-02-09 2000-08-10 Agt Gas Technology Gmbh Kochstelle für Gasherde
US6263868B1 (en) 1999-02-09 2001-07-24 Agt Gas Technology Gmbh Gas stove burner

Also Published As

Publication number Publication date
FR2517809A1 (fr) 1983-06-10
FR2517809B1 (fr) 1984-03-16

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB

17P Request for examination filed

Effective date: 19831010

STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19860329

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MONTEIL, JEAN-FRANCOIS