EP0125965B1 - Brûleur pour combustibles gazeux à systèmes d'allumage et de sécurité incorporés - Google Patents

Brûleur pour combustibles gazeux à systèmes d'allumage et de sécurité incorporés Download PDF

Info

Publication number
EP0125965B1
EP0125965B1 EP84400831A EP84400831A EP0125965B1 EP 0125965 B1 EP0125965 B1 EP 0125965B1 EP 84400831 A EP84400831 A EP 84400831A EP 84400831 A EP84400831 A EP 84400831A EP 0125965 B1 EP0125965 B1 EP 0125965B1
Authority
EP
European Patent Office
Prior art keywords
burner
cap
burner body
grooves
ignition
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.)
Expired
Application number
EP84400831A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0125965A1 (fr
Inventor
Jacques François Pistien
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.)
Engie SA
Original Assignee
Gaz de France 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 Gaz de France SA filed Critical Gaz de France SA
Priority to AT84400831T priority Critical patent/ATE35451T1/de
Publication of EP0125965A1 publication Critical patent/EP0125965A1/fr
Application granted granted Critical
Publication of EP0125965B1 publication Critical patent/EP0125965B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/725—Protection against flame failure by using flame detection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
    • F23D14/065—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head with injector axis inclined to the burner head axis

Definitions

  • the present invention relates generally to burners for gaseous fuels, in particular for cooking appliances, equipped with ignition and extinguishing safety devices.
  • the invention relates more particularly to a burner for gaseous fuels with ignition and safety systems incorporated, with main flame and with pilot flame arranged in the vicinity of the main flame to stabilize the latter, comprising a burner body which defines a chamber distribution annular receiving the fuel gas-primary air mixture, main passages being formed in the burner body to supply the main flame with fuel mixture from said chamber and auxiliary passages being also formed in the burner body to supply the pilot flame in combustible mixture from the chamber; at least one ignition electrode; a security feature; and a protective cap disposed on the burner body.
  • Burners can be ignited electrically by sparks from an electrode or spark plug using a piezoelectric or electronic system.
  • the safety device can be constituted by an expansion device (metallic, liquid or vapor), a device producing an electromotive force, such as for example a thermocouple, or an electronic device using for example an ionization detection electrode.
  • an expansion device metallic, liquid or vapor
  • a device producing an electromotive force such as for example a thermocouple
  • an electronic device using for example an ionization detection electrode such as for example a thermocouple
  • the ignition electrodes and the safety elements are arranged outside the burners, near the outlet orifices of the flames, in the axis of the latter and at a determined distance from the orifices.
  • Document GBA-1 443 553 also discloses a gas burner which is equipped with an electrode placed in a central well under a cover plate, but is devoid of a safety device and therefore cannot meet safety requirements generally imposed on burners for cooking appliances.
  • Document GB-A-1 348 245 also describes a gas burner in which a safety element is associated with an ignition electrode placed inside a central well of the burner.
  • the security element itself is, however, only partially placed inside the central well and projects outwards through a slot in the side wall of the central well, so that the end forms the part sensitive security element is not protected against the action of cleaning products or untimely overflows of food during cooking.
  • the present invention aims precisely to remedy the aforementioned drawbacks and to provide a burner ensuring effective protection of all the ignition and safety devices against the risks of damage or adjustment.
  • a burner of the type defined at the top of the present document characterized in that the burner body defines a central well coaxial with the distribution chamber, located under the cap and opening out at the bottom of the burner to allow the 'secondary air supply; in that radial grooves each opening into the distribution chamber through at least one orifice are formed in the upper part of the burner body located under the cap, in the vicinity of the ignition electrode and the safety element, and in that the ignition electrode and the safety element are arranged inside the central well under the protective cap.
  • the orifices and grooves made in the upper part of the burner head allow ignition by electrode and safety by thermocouple from the inside of the burner while ensuring interignition.
  • the ignition electrode and the safety element are placed diametrically opposite inside the central well.
  • the ignition electrode and the safety element are mounted on flanges of the burner body which form protrusions inside the central well.
  • the grooves formed in the upper part of the burner body allow communication with the distribution chamber by means of two orifices forming an angle between them.
  • the grooves formed in the upper part of the burner body are flared at the peripheral part of the burner body.
  • the grooves formed in the burner body have a width of between about 1 and 4 mm.
  • the cap rests on the burner head by ribs delimiting between them radial passages.
  • the radial passages formed between the ribs are of constant width or are slightly narrowed towards the periphery of the cap.
  • the height of the ribs is at least about 4mm.
  • the particular configuration of the lower surface of the cap allows both better distribution of the calories absorbed during the operation of the burner and greater ventilation in the flames, which improves combustion.
  • FIGS. 1 and 2 show a burner in accordance with the invention, which does not have any ignition or safety device located outside of the burner body 100.
  • the burner body itself is made up of three main parts.
  • a lower annular part 102 delimits a distribution chamber for the primary fuel-air gas mixture which arrives via a lateral duct 101 opening into the annular distribution chamber 20.
  • the inner annular wall of the distribution chamber 20 delimits a free space 50 which opens at the lower part of the burner while being isolated from the interior of the distribution chamber 20.
  • the main flames and the pilot flame are supplied with combustible mixture from the distribution chamber 20 by passages 22, 21 respectively provided in the intermediate part 103 of the burner.
  • the annular passage 21 for supplying the pilot flame can be delimited for example by two separate parts 103, 103 ′ of the intermediate part of the burner while the passages 22 for supplying the main flames can be formed at the upper external surface of the upper part 103 'of the intermediate part 103, 103'.
  • the passages 22 are distributed uniformly over the entire periphery of the burner.
  • the upper part 104 of the burner body 100 which cooperates with the intermediate part 103, 103 ′ to define the main passages 22 for supplying the main flames, has the form of a cylindrical sleeve provided with a flange 107 (FIG. 3 ).
  • a protective cap 105 rests on the flange 107 of the upper part 104 of the burner.
  • a vertical central well 50 is formed inside the burner over the entire height thereof and is only closed at its upper part by the cap 105.
  • An electrode 10 and a safety element 15 are arranged inside the central well 50 and are fixed on pairs of flanges 51, 52 and 53, 54 respectively.
  • one 53, 51 is integral with the upper part 104 of the burner body
  • the other 54, 52 is integral with the lower part 102 of the burner body.
  • the security element 15 fixed to the flange 54 by nuts 13, 14, has its active part 16 (for example a thermocouple located immediately under the cap 105, in the vicinity of the upper part 104.
  • the electrode 10 has its active part 11 immediately under the cap 105 in the vicinity of the upper part 104.
  • the security element 15 and the electrode 10 are arranged diametrically opposite inside. of the cylindrical well 50 and are parallel to the axis of the burner.
  • the electrode 10 and the safety element 15 which pass through the flanges 51, 52 and 53, 54 respectively are connected by conductors 12, 17 respectively to conventional electrical devices burner control unit, not shown.
  • grooves 41, 42 formed in the upper face of the upper part 104 of the burner body 100.
  • the radial grooves 42, 41 are located at look at the active parts 11, 16 of the electrode 10 and of the safety element 15 respectively.
  • the grooves 41, 42 are thus aligned along a diameter of the flange 107.
  • Each groove 41, 42 communicates through an orifice 43, 45 respectively with the annular space 47 of distribution of the fuel mixture to the main passages 22 for supplying the main flames.
  • the holes 43,45 are intended to allow interignition.
  • Additional orifices 44, 46 the axes of which are inclined for example by about 50 to 60 ° relative to the axis of the first orifices 43, 45 respectively, put in communication with the annular space 47 for distributing the combustible mixture to the main passages 22, vertical groove parts 41b, 42b which extend the horizontal groove parts 41a, 42a of the grooves 41, 42.
  • the orifices 43,45 also help to allow interignition.
  • the grooves 41, 42 may have slightly different configurations from those shown in the figures, but it is essential that each of the grooves communicates at least locally, with the annular space 47 for distributing the fuel mixture at the main passages 22.
  • Each groove 41 , 42 may for example have a greater width at its upper part and be extended by a narrower slot for communication with the annular space 47. It is advantageous that the grooves 41, 42 are slightly flared in the zone where they open out. at the periphery of the burner body.
  • a groove 41, 42 in accordance with the embodiment of FIGS. 1, 3 and 4 may have a width on the order of 2 to 2.5 mm and a depth on the order of 1.2 to 1.5 mm, the orifices 43,44,45,46 possibly having a diameter close to the width of the grooves.
  • the protective cap 105 rests on the upper surface of the flange 107 of the part 104 by projections or flat ribs 151 regularly distributed on the periphery of the lower face of the cap 105.
  • Radial passages 152 of substantially constant width or slightly increasing towards the outside are reserved between the ribs 151.
  • the passages 152 favor the passage of secondary air and the aeration of the flames while the lower surfaces of the ribs 151 in contact with the burner head 104 participate in the diffusion of the calories absorbed during the operation of the burner.
  • the ribs 151 may for example be twelve in number and are regularly distributed over the peripheral part of the underside of the cap 105.
  • the ribs 151 may have a height of the order of 3 to 5 mm.
  • Pawns 153 for example three pawns regularly offset by 120 °, integral with the underside of the cap 105, are engaged in corresponding housings 141 (FIG. 4) of the flange 107 of the part 104 to correctly position the cap 105 on the burner body 100.
  • the cap 105 has a diameter equal to or slightly greater than the diameter of the burner body 100 at the pilot flame.
  • the grooves 41, 42 and orifices 43 to 46 formed in the upper part 104 of the burner head have the role of enabling the ignition by electrode and the safety by thermocouple from the inside. of the burner.
  • the diameter of the orifices 43 to 46, their location, and the dimensional characteristics of the grooves 41, 42 are adapted to ensure inter-ignition and safety over a whole determined range of use of the burner between full flow and reduced flow.
  • the parameters of these elements can thus be adapted to different operating conditions.
  • the orifices 46, 44 are essential for maintaining a residual flame in the vicinity of the elements 10 and 15 and ensuring inter-ignition by the annular zone 47 while the orifices 45, 43 do not have only a more secondary role.
  • the burner body as described above is particularly easy to manufacture and can be made, for example, of aluminum. It is particularly suitable for extra-flat cooktops.
  • the mounting of the electrodes and safety elements is also particularly simple.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Control Of Combustion (AREA)
EP84400831A 1983-04-29 1984-04-25 Brûleur pour combustibles gazeux à systèmes d'allumage et de sécurité incorporés Expired EP0125965B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400831T ATE35451T1 (de) 1983-04-29 1984-04-25 Brenner fuer gasfoermigen brennstoff mit eingebautem zuend- und sicherheitssystem.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8307170A FR2545196B1 (fr) 1983-04-29 1983-04-29 Bruleur pour combustibles gazeux a systemes d'allumage et de securite incorpores
FR8307170 1983-04-29

Publications (2)

Publication Number Publication Date
EP0125965A1 EP0125965A1 (fr) 1984-11-21
EP0125965B1 true EP0125965B1 (fr) 1988-06-29

Family

ID=9288409

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400831A Expired EP0125965B1 (fr) 1983-04-29 1984-04-25 Brûleur pour combustibles gazeux à systèmes d'allumage et de sécurité incorporés

Country Status (8)

Country Link
US (1) US4518346A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0125965B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS6086316A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE35451T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1223516A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3472444D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES287342Y (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2545196B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111271740A (zh) * 2020-03-09 2020-06-12 嵊州市圣华智控科技有限公司 一种高稳定性燃气点火装置

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JP5946778B2 (ja) * 2013-01-28 2016-07-06 リンナイ株式会社 コンロ用バーナ
CN104534472B (zh) * 2014-12-11 2017-03-22 广东阿诗丹顿电气有限公司 一种火盖和灶具燃烧器
CN104696959B (zh) * 2015-03-03 2017-03-29 兆轩能科技有限公司 一种燃烧器及其点火器
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US10837651B2 (en) 2015-09-24 2020-11-17 Whirlpool Corporation Oven cavity connector for operating power accessory trays for cooking appliance
US11777190B2 (en) 2015-12-29 2023-10-03 Whirlpool Corporation Appliance including an antenna using a portion of appliance as a ground plane
US10145568B2 (en) 2016-06-27 2018-12-04 Whirlpool Corporation High efficiency high power inner flame burner
US10627113B2 (en) 2016-12-29 2020-04-21 Whirlpool Corporation Distributed vertical flame burner
US10551056B2 (en) * 2017-02-23 2020-02-04 Whirlpool Corporation Burner base
US10451290B2 (en) 2017-03-07 2019-10-22 Whirlpool Corporation Forced convection steam assembly
US10660162B2 (en) 2017-03-16 2020-05-19 Whirlpool Corporation Power delivery system for an induction cooktop with multi-output inverters
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US10627116B2 (en) 2018-06-26 2020-04-21 Whirlpool Corporation Ventilation system for cooking appliance
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Also Published As

Publication number Publication date
DE3472444D1 (en) 1988-08-04
JPH0137644B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-08-08
FR2545196A1 (fr) 1984-11-02
ES287342Y (es) 1987-01-16
JPS6086316A (ja) 1985-05-15
ES287342U (es) 1986-05-01
EP0125965A1 (fr) 1984-11-21
ATE35451T1 (de) 1988-07-15
CA1223516A (en) 1987-06-30
US4518346A (en) 1985-05-21
FR2545196B1 (fr) 1985-08-16

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