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EP3158265A1 - Gas stove including a lighting system for two burners - Google Patents

Gas stove including a lighting system for two burners

Info

Publication number
EP3158265A1
EP3158265A1 EP15726232.0A EP15726232A EP3158265A1 EP 3158265 A1 EP3158265 A1 EP 3158265A1 EP 15726232 A EP15726232 A EP 15726232A EP 3158265 A1 EP3158265 A1 EP 3158265A1
Authority
EP
European Patent Office
Prior art keywords
openings
chamber
burner
gas stove
central axis
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Withdrawn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
EP15726232.0A
Other languages
German (de)
French (fr)
Inventor
Marc Champion
Rémi PIOT
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.)
Application des Gaz SA
Original Assignee
Application des Gaz 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 Application des Gaz SA filed Critical Application des Gaz SA
Publication of EP3158265A1 publication Critical patent/EP3158265A1/en
Withdrawn legal-status Critical Current

Links

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
    • F23D14/02—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
    • F23D14/08—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 axial outlets at the burner head
    • 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, e.g. noise reduction means
    • F23D14/70—Baffles or like flow-disturbing devices
    • 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
    • F24C3/10—Arrangement or mounting of ignition devices
    • F24C3/103—Arrangement or mounting of ignition devices of electric ignition devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/104—Grids, e.g. honeycomb grids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2207/00—Ignition devices associated with burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14062—Special features of gas burners for cooking ranges having multiple flame rings

Definitions

  • Gas stove including an ignition system for two burners
  • the present invention relates to a gas stove comprising an ignition system for two burners.
  • Inflammation of the mixture leaving the chambers may be provided by an electrode arranged to produce an electric arc. Inflammation of the mixture can occur only in the presence of a sufficient amount of gas.
  • the passage between the two burners and the arrangement of the openings for generating flames in a desired direction can make the simultaneous or selective ignition of the two burners complicated to implement.
  • the inflammation requires a sufficient accumulation of gas in an area close to the electrode.
  • the present invention aims to solve all or some of the disadvantages mentioned above.
  • the present invention relates to a gas stove comprising:
  • a first burner provided with a first chamber and a first circuit for supplying the first chamber, the first chamber being disposed along a central axis,
  • a second burner provided with a second chamber and a second circuit for feeding the second chamber, the second chamber being annular and disposed around the first chamber relative to the central axis.
  • Each burner comprises a head provided with primary openings arranged to establish fluid communication between the corresponding chamber and the outside, each primary opening extending along a primary axis forming an angle between 0 ° and 10 ° with the central axis. .
  • the gas stove includes an ignition system itself including:
  • each head for establishing fluid communication between the corresponding chamber and the outside, each secondary opening extending along a secondary axis forming an angle of at least 45 ° with the central axis,
  • an ignition device disposed in the intermediate space, at least a portion of the secondary openings being opposite the ignition device
  • transverse panel disposed facing the ignition device relative to the central axis, the transverse panel being above the ignition device in a position of use of the gas stove.
  • the orientation of the primary axes relative to the central axis generates substantially vertical flames extending above the heads in the use position.
  • the vertical flames are also short, ie low, compared to burners generating oblique flames. This improves the resistance of flames to the wind, especially the risk of blowing.
  • the secondary openings having a different angle with respect to the primary openings are arranged to diffuse an air-gas mixture in a direction transverse to the central axis.
  • the transverse panel disposed above the ignition device thus creates a recirculation zone of the mixture emitted through the secondary openings.
  • the transverse panel allows the transmission of a flame from one burner to the other.
  • a burner having secondary openings facing the ignition device can be ignited by the ignition device and then the flame can be transferred to the other burner through the transverse panel.
  • At least a portion of the secondary openings of each burner is opposite the ignition device.
  • the gas stove comprises a first and a second independently powered burner.
  • the ignition system allows the ignition of said burner. Then if a user wants to feed the second burner, it is not necessary to use the ignition system again, the proximity of the flames of the previously lit burner sufficient to ignite the other burner.
  • the gas stove has the double advantage of having two independent burners capable of generating vertical flames and a single ignition system capable of igniting either a burner or both burners at the same time.
  • At least a first part of the secondary openings extends along secondary axes forming angles with the central axis between 80 and 100 °.
  • the first part of the secondary openings diffuse an air-gas mixture in a direction transverse to the central axis, which allows a better accumulation of gas in the recirculation zone by the transverse panel.
  • each head includes a set of openings for the establishment of flames and a set of openings of the ignition system, the set of openings for establishing flames comprising the primary openings. and the set of openings in the ignition system including the secondary openings, the total area of the sections of openings intended for the establishment of flames is between five and thirty times greater than the total area of the sections of openings of the system ignition. According to one aspect of the invention the total area of the sections of the openings intended for the establishment of flames of the head of the first burner is between five and twenty times greater than the total area of the sections of the openings of the ignition system. the head of the first burner.
  • the total area of the sections of the openings for the flame establishment of the head of the second burner is between ten and thirty times greater than the total area of the sections of the openings of the ignition system. the head of the second burner.
  • the total area of the sections of the openings for the establishment of flames is between ten and twenty-five times greater than the total area of the sections of the openings of the ignition system.
  • the total area of the sections of the openings intended for the establishment of flames of the head of the first burner is between ten and fifteen times greater than the total area of the sections of the openings of the ignition system of the head of the first burner.
  • the total area of the sections of the openings for the establishment of flames of the head of the second burner is between fifteen and twenty-five times greater than the total area of the sections of the openings of the system. ignition of the head of the second burner.
  • the primary openings and the secondary openings have a circular section, the diameter of the primary openings being between 1 and 1.2 mm, and the diameter of the secondary openings between 0.6 and 0.8 mm.
  • the ignition device comprises an electrode extending along an axis having an orientation of between 0 and 10 ° with respect to the central axis.
  • the electrode has a steel core and an axially extending ceramic cover, the cover being attached to the central core.
  • the transverse panel in the position of use, extends relative to the central axis, facing a radial portion of the intermediate space.
  • the head of the first burner or the second burner comprises a cylindrical portion and a portion transverse to the central axis, a plurality of orifices being formed in the cylindrical portion, said head further comprising a ring attached to the cylindrical portion, a slot being formed in an upper portion of the ring, the orifices of said plurality of orifices opposite the slot constituting at least a portion of the secondary openings.
  • a first stamped sheet comprises the cylindrical portion and the transverse portion, the cylindrical portion and the transverse portion being in one piece.
  • the head of the first burner or the second burner comprises a second pressed sheet having a window, the head further comprising a grid attached to the second sheet pressed to cover the window, the gate being provided perforations constituting at least a portion of the secondary openings.
  • the arrangement of the grid in the window prevents the flame generated following ignition by the ignition device from entering the corresponding chamber.
  • the grid is welded by electric welding on the second stamped sheet.
  • the grid is included in the second stamped sheet and is also made by stamping.
  • the gas stove comprises a sampling cage provided with:
  • transverse portion on which are reported the two side portions, the transverse portion comprising the transverse panel.
  • the sampling cage further comprises at least one fixing lug intended to be welded to the head of the first burner or the second burner.
  • the tab ensures the fixation of the sampling cage on the first or the second burner.
  • Figure 1 is a perspective view of a gas stove comprising an ignition system.
  • FIG 2 is a detailed perspective view of the ignition system and the gas stove.
  • Figure 3 and 4 are detailed perspective views of an igniting device of the ignition system.
  • a gas stove 1 comprises a first burner 3 and a second burner 5, respectively provided with a first chamber 7 and a second chamber 9.
  • the first chamber 7 is substantially cylindrical and extends along a central axis January 1.
  • the second chamber 9 is annular and surrounds the first chamber 7 relative to the central axis January 1.
  • the first burner 3 further comprises a first supply circuit 13 arranged to feed the first chamber 7 in a first mixture 15.
  • the first supply circuit 13 is also able to be controlled by a user: its power supply can be stopped or regulated.
  • the first mixture comprises a fuel and an oxidizer: in the embodiment shown, it is an air-gas mixture, the gas being a gas usually used for gas stoves.
  • the second burner 5 comprises a second feed circuit 17 in a second mixture 19 of air-gas type operating on the same principle as the first feed circuit 13.
  • first supply circuit 13 and the second supply circuit 17 are completely independent and that their regulation is also performed independently. It is quite possible to feed only one of the two chambers 7, 9 in mixture 15, 19.
  • the first chamber 7 and the second chamber 9 are distant.
  • An intermediate space 21 is defined between the two chambers 7, 9 and extends along the chambers 7, 9 with respect to the central axis 1 January.
  • the intermediate space 21 is annular and arranged to allow the flow of air along the central axis 1 1 of a lower end 23 to an upper end 25 of the chambers 7, 9 in a position of use of the stove to gas 1.
  • the first chamber 7 and the second chamber 9 are respectively provided with a first head 27 and a second head 29.
  • Each head 27, 29 comprises a plurality of primary openings 31 placing in fluid communication each chamber 7, 9 with the outside 33.
  • the primary openings 31 are thus intended to emit flames generated by the ignition of the corresponding mixture 15, 19, the flames being fixed at the level of the corresponding burner head 3, 5.
  • Each primary opening 31 has a circular section and extends along a primary axis 35.
  • the diameter of the primary openings 31 is between 1 and 1.2 mm.
  • the primary axes 35 may have slightly different orientations but form with the central axis 1 1 an angle less than 10 °.
  • the first head 27 and the second head 29 further comprise third openings 37 extending along an axis 39 having an angle that may be greater than 10 ° with respect to the central axis 11.
  • the first head 27 comprises a first stamped sheet 41 provided with a cylindrical portion 43 and a transverse portion 45.
  • Primary openings 31 and third openings 37 are formed in the transverse portion 45.
  • the cylindrical portion 43 has orifices 47 of substantially circular section.
  • the first head 27 further comprises a ring 49 disposed opposite the cylindrical portion 43.
  • the ring 49 comprises an upper portion 51 having a slot 53, the orifices 47 being opposite the slot 53.
  • the second head 29 comprises a second stamped sheet 55 in which a window 57 is formed.
  • the window 57 is covered by a grid 59 provided with perforations 61.
  • the grid 59 is metallic and is electrically welded to the second pressed sheet 55.
  • the grid 59 furthermore has a reduced thickness relative to the second pressed sheet 55, a recess 63 appearing on the second head 29 at the level of the grid 59.
  • the gate 59 In the position of use the gate 59 has a substantially horizontal portion 65, a rounded intermediate portion 67 and a substantially vertical portion 69, the perforations 61 being arranged in a regular manner on these three portions 65, 67, 69.
  • the grid 59 may be included in the second stamped sheet 55 in this case, a geometry identical to that shown in the figures can be obtained during the stamping of the second stamped sheet 55.
  • the orifices 47 and the perforations 61 have a circular section with a diameter of between 0.6 and 0.8 mm.
  • the primary openings 31 and the third openings 37 present sections whose areas are of the same order of magnitude.
  • the gas stove is provided with a container support 70.
  • the gas stove 1 further comprises an ignition system 71 disposed in the intermediate space 21, the ignition system 71 being provided with a sampling cage 73 and an ignition device 75 of electrode type 77.
  • FIGS. 3 and 4 do not show the sampling cage to make apparent the other elements of the ignition system 71.
  • the ignition system 71 requires the sampling cage 73.
  • the sampling cage 73 comprises a transverse portion 79, two lateral portions 81 and two fastening tabs 83 intended to be welded by electric welding to the second pressed sheet 55.
  • the lateral portions 81 are substantially vertical in the position of use and arranged radially with respect to the central axis 1 1 on either side of the electrode 77.
  • the transverse portion 79 comprises a transverse panel 85 disposed above the ignition device 75.
  • the electrode 77 extends along an axis 87 parallel to the central axis January 1.
  • the electrode 77 is of piezoelectric type comprises a core 89 of steel extending along the axis 87 of the electrode 77 and a cover 91 of ceramic, the cover 91 being tubular and surrounding the core 89.
  • the orifices 47 of the first head 27 facing the slot 53 and the perforations 61 of the grid 59 belonging to the intermediate portion rounded 67 and the substantially vertical portion 69 constitute secondary openings 93.
  • the set of openings intended for the establishment of flames comprises the primary openings 31 and the third openings 37.
  • the set of openings of the ignition system 71 comprises meanwhile the secondary openings 93.
  • the total area of the sections, the sum of the areas of each section, openings for the establishment of flames of the first head 27 is between ten and fifteen times greater than the total area of the sections of the secondary openings 93 of the first head 27.
  • the total area of the flame establishment opening sections of the second head 29 is between fifteen and twenty-five times greater than the total area of the secondary opening sections 93 of the second head 29.
  • This ratio between the passage areas of the air-gas mixture is important in the sense that most of the air-gas mixture is intended for the formation of flames.
  • the smallest passage area of the secondary openings 93 is determined to provide an amount of air-gas mixture sufficient to allow ignition in the vicinity of the electrode 77.
  • the secondary openings 93 each extend along a secondary axis 95 having an angle greater than 45 ° with respect to the central axis 1 1.
  • the secondary axes 45 of the secondary openings 93 of the rounded intermediate portion 67 have angles greater than 45 ° and less than 90 ° while the angles of the other secondary openings 93 have substantially equal to 90 °.
  • the axis 87 of the electrode 77 is disposed midway between the outlet of the secondary openings 93 having a 90 ° angle of the first head 27 and the second head 29.
  • the transverse panel 85 creates a recirculation zone 97 of the first mixture 15 and / or the second mixture 19 emitted by the secondary openings 93. Indeed, the transverse panel 85 is opposed to the vertical dispersion of the gas included in the first mixture 15 and / or the second mixture 19.
  • the electrode 77 When the concentration of gas is sufficient to cause ignition in the recirculation zone 97, the electrode 77 is arranged to emit a spark which is formed between the electrode 77 and the sampling cage 73 or between the electrode 77 and the electrode 77. burner head 3, 5.
  • the flames are transmitted at the level of the first head 27 and / or the second head 29 according to the mixture supply 15, 19.
  • the transmission is due to the proximity of the primary openings 31 and third openings 37 with the flames coming from the recirculation zone 97.
  • the primary openings 31 and the third openings 37 are arranged so that the generated flames are substantially vertical in the position of use, that is to say, substantially parallel to the central axis January 1.
  • the intermediate space 21 allows the circulation of air which is sucked by the flames. This sucked air or secondary air participates in the combustion reaction.
  • the generated flames are also shorter than the flames generated by other types of burners producing oblique flames.
  • the gas stove 1 is thus able to generate low flames resistant to wind.
  • the gas stove 1 is capable of generating low vertical flames and further comprises a reliable ignition system 71, in particular thanks to the presence of secondary openings 93 and a recirculation zone 97. Indeed the primary openings 31 and the third openings 37 are arranged for the mixture 15, 19 flows substantially vertically. Under these conditions, ignition is complicated because it is necessary to accumulate a sufficient quantity of gas near an electrode 77.
  • the gas stove 1 includes only one electrode 77 adapted to ignite each burner 3, 5 separately. In comparison with two independent burners each comprising an ignition system, the gas stove 1 presented comprises only one ignition system 71 that can be used for one of the two burners 3, 5.
  • This arrangement makes it possible to switch on only one of the two burners 3, 5, the sampling cage 73 being common to the two burners 3, 5.
  • gas stoves comprising several burners with a single ignition system that can ignite only one of the burners.
  • the gas stove in question must further include a device for transmitting flames between the burners.
  • the gas stove 1 presented therefore has an additional flexibility of use, ignition being summed up when opening the supply of a burner 3, 5 and the ignition of the ignition system 71. In addition, once a burner 3, 5 is lit, it is sufficient to supply the second burner 3, 5 so that both operate simultaneously.
  • the invention is not limited to the sole embodiment of this gas stove, described above as an example, it encompasses all the variants.

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

Abstract

The invention relates to a gas stove (1) including a first burner (3), a second burner (5) and a lighting system (71) including a plurality of secondary openings provided in each head (27, 29) in order to establish fluid communication between the corresponding chamber (7, 9) and the outside (33), each secondary opening extending along a secondary axis forming an angle of at least 45° with the central axis (11). The lighting system (71) also includes an ignition device (75) arranged in the intermediate space (21), at least one portion of the secondary openings being opposite the ignition device (75). The ignition system (71) also includes a transverse panel (85) arranged facing the ignition device (75) relative to the central axis (11), the transverse panel (85) being above the ignition device (75) in an operational position of the gas stove (1).

Description

Réchaud à gaz comprenant un système d'allumage pour deux brûleurs  Gas stove including an ignition system for two burners
La présente invention concerne un réchaud à gaz comprenant un système d'allumage pour deux brûleurs. The present invention relates to a gas stove comprising an ignition system for two burners.
Il est connu d'utiliser un premier brûleur pourvu d'une première chambre de mélange et d'un deuxième brûleur pourvu d'une deuxième chambre de mélange, les chambres de mélange comprenant des alimentations indépendantes.  It is known to use a first burner provided with a first mixing chamber and a second burner provided with a second mixing chamber, the mixing chambers comprising independent feeds.
Une bonne aération, par exemple par adjonction d'air secondaire, permet une combustion efficace. L'adjonction d'air secondaire peut être réalisée par l'aspiration d'air à travers un passage séparant les deux brûleurs.  Good ventilation, for example by adding secondary air, allows efficient combustion. The addition of secondary air can be achieved by the suction of air through a passage separating the two burners.
L'inflammation du mélange sortant des chambres peut être assurée par une électrode agencée pour produire un arc électrique. L'inflammation du mélange ne peut se produire qu'en présence d'une quantité de gaz suffisante.  Inflammation of the mixture leaving the chambers may be provided by an electrode arranged to produce an electric arc. Inflammation of the mixture can occur only in the presence of a sufficient amount of gas.
Toutefois le passage entre les deux brûleurs et l'agencement des ouvertures pour engendrer des flammes selon une direction souhaitée peut rendre l'inflammation simultanée ou sélective des deux brûleurs compliquée à mettre en œuvre.  However, the passage between the two burners and the arrangement of the openings for generating flames in a desired direction can make the simultaneous or selective ignition of the two burners complicated to implement.
En effet, l'inflammation nécessite une accumulation de gaz suffisante dans une zone proche de l'électrode.  In fact, the inflammation requires a sufficient accumulation of gas in an area close to the electrode.
La présente invention vise à résoudre tout ou partie des inconvénients mentionnés ci-dessus.  The present invention aims to solve all or some of the disadvantages mentioned above.
A cet effet, la présente invention concerne un réchaud à gaz comprenant :  For this purpose, the present invention relates to a gas stove comprising:
un premier brûleur pourvu d'une première chambre et d'un premier circuit pour l'alimentation de la première chambre, la première chambre étant disposée selon un axe central,  a first burner provided with a first chamber and a first circuit for supplying the first chamber, the first chamber being disposed along a central axis,
- un second brûleur pourvu d'une deuxième chambre et d'un deuxième circuit pour l'alimentation de la seconde chambre, la seconde chambre étant annulaire et disposée autour de la première chambre par rapport à l'axe central.  - A second burner provided with a second chamber and a second circuit for feeding the second chamber, the second chamber being annular and disposed around the first chamber relative to the central axis.
La première chambre et la deuxième chambre étant distantes, un espace intermédiaire s'étend entre la première chambre et la deuxième chambre par rapport à l'axe central. Chaque brûleur comprend une tête pourvue d'ouvertures primaires agencées pour établir une communication fluidique entre la chambre correspondante et l'extérieur, chaque ouverture primaire s'étendant selon un axe primaire formant avec l'axe central un angle compris entre 0° et 10°. The first chamber and the second chamber being spaced apart, an intermediate space extends between the first chamber and the second chamber relative to the central axis. Each burner comprises a head provided with primary openings arranged to establish fluid communication between the corresponding chamber and the outside, each primary opening extending along a primary axis forming an angle between 0 ° and 10 ° with the central axis. .
Le réchaud à gaz comprend un système d'allumage lui-même comprenant :  The gas stove includes an ignition system itself including:
une pluralité d'ouvertures secondaires ménagées dans chaque tête pour établir une communication fluidique entre la chambre correspondante et l'extérieur, chaque ouverture secondaire s'étendant selon un axe secondaire formant avec l'axe central un angle d'au moins 45°,  a plurality of secondary openings in each head for establishing fluid communication between the corresponding chamber and the outside, each secondary opening extending along a secondary axis forming an angle of at least 45 ° with the central axis,
un dispositif d'inflammation disposé dans l'espace intermédiaire, au moins une partie des ouvertures secondaires étant en regard du dispositif d'inflammation,  an ignition device disposed in the intermediate space, at least a portion of the secondary openings being opposite the ignition device,
un panneau transversal disposé en regard du dispositif d'inflammation par rapport à l'axe central, le panneau transversal étant au dessus du dispositif d'inflammation en une position d'utilisation du réchaud à gaz.  a transverse panel disposed facing the ignition device relative to the central axis, the transverse panel being above the ignition device in a position of use of the gas stove.
L'orientation des axes primaires par rapport à l'axe central engendre des flammes sensiblement verticales s'étendant au dessus des têtes en position d'utilisation.  The orientation of the primary axes relative to the central axis generates substantially vertical flames extending above the heads in the use position.
L'établissement de ces flammes créé une aspiration d'air à travers l'espace intermédiaire selon la direction d'extension des flammes. La combustion ainsi obtenue est efficace et engendre peu d'imbrûlés.  The establishment of these flames creates a suction of air through the intermediate space in the direction of extension of the flames. The combustion thus obtained is effective and generates few unburnt.
Les flammes verticales sont également courtes, c'est-à-dire basses, en comparaison avec des brûleurs générant des flammes obliques. Ceci améliore la résistance des flammes au vent, notamment au risque de soufflage.  The vertical flames are also short, ie low, compared to burners generating oblique flames. This improves the resistance of flames to the wind, especially the risk of blowing.
Les ouvertures secondaires présentant un angle différent par rapport aux ouvertures primaires sont agencées pour diffuser un mélange air- gaz selon une direction transversale à l'axe central.  The secondary openings having a different angle with respect to the primary openings are arranged to diffuse an air-gas mixture in a direction transverse to the central axis.
Le panneau transversal disposé au dessus du dispositif d'inflammation, créé ainsi une zone de recirculation du mélange émis à travers les ouvertures secondaires.  The transverse panel disposed above the ignition device, thus creates a recirculation zone of the mixture emitted through the secondary openings.
Il est ainsi possible d'obtenir une quantité de gaz suffisante dans la zone de recirculation pour que le dispositif d'inflammation permette l'allumage d'une flamme au niveau des ouvertures secondaires, cette inflammation engendrant ensuite l'inflammation du mélange émis par les ouvertures primaires. It is thus possible to obtain a sufficient quantity of gas in the recirculation zone so that the ignition device allows the ignition of a flame at the secondary openings, this ignition then generating ignition of the mixture emitted by the primary openings.
De plus, le panneau transversal permet la transmission d'une flamme d'un brûleur vers l'autre. Un brûleur présentant des ouvertures secondaires en regard du dispositif d'inflammation peut être allumé par le dispositif d'inflammation et ensuite la flamme peut être transférée vers l'autre brûleur grâce au panneau transversal.  In addition, the transverse panel allows the transmission of a flame from one burner to the other. A burner having secondary openings facing the ignition device can be ignited by the ignition device and then the flame can be transferred to the other burner through the transverse panel.
Selon un aspect de l'invention, au moins une partie des ouvertures secondaires de chaque brûleur est en regard du dispositif d'inflammation.  According to one aspect of the invention, at least a portion of the secondary openings of each burner is opposite the ignition device.
II est à noter que le réchaud à gaz comprend un premier et un deuxième brûleur alimentés indépendamment.  It should be noted that the gas stove comprises a first and a second independently powered burner.
Lorsqu'un seul des deux brûleurs est alimenté, le système d'allumage permet l'allumage dudit brûleur. Ensuite si un utilisateur souhaite alimenter le second brûleur, il n'est pas nécessaire d'utiliser à nouveau le système d'allumage, la proximité des flammes du brûleur précédemment allumé suffisant à l'allumage de l'autre brûleur.  When only one of the two burners is powered, the ignition system allows the ignition of said burner. Then if a user wants to feed the second burner, it is not necessary to use the ignition system again, the proximity of the flames of the previously lit burner sufficient to ignite the other burner.
Il en ressort que le réchaud à gaz a le double avantage de présenter deux brûleurs indépendants aptes à engendrer des flammes verticales et un système d'allumage unique apte à allumer soit un brûleur soit les deux brûleurs en même temps.  It shows that the gas stove has the double advantage of having two independent burners capable of generating vertical flames and a single ignition system capable of igniting either a burner or both burners at the same time.
Selon un aspect de l'invention, au moins une première partie des ouvertures secondaires s'étend selon des axes secondaires formant des angles avec l'axe central compris entre 80 et 100°.  According to one aspect of the invention, at least a first part of the secondary openings extends along secondary axes forming angles with the central axis between 80 and 100 °.
La première partie des ouvertures secondaires diffusent un mélange air-gaz selon une direction transversale à l'axe central, ce qui permet une meilleure accumulation de gaz dans la zone de recirculation par le panneau transversal.  The first part of the secondary openings diffuse an air-gas mixture in a direction transverse to the central axis, which allows a better accumulation of gas in the recirculation zone by the transverse panel.
Selon un aspect de l'invention, chaque tête comprend un ensemble d'ouvertures destinées à l'établissement de flammes et un ensemble d'ouvertures du système d'allumage, l'ensemble d'ouvertures destinées à établissement de flammes comprenant les ouvertures primaires et l'ensemble d'ouvertures du système d'allumage comprenant les ouvertures secondaires, l'aire totale des sections des ouvertures destinées à l'établissement de flammes est entre cinq et trente fois supérieure à l'aire totale des sections des ouvertures du système d'allumage. Selon un aspect de l'invention l'aire totale des sections des ouvertures destinées à l'établissement de flammes de la tête du premier brûleur est entre cinq et vingt fois supérieure à l'aire totale des sections des ouvertures du système d'allumage de la tête du premier brûleur. According to one aspect of the invention, each head includes a set of openings for the establishment of flames and a set of openings of the ignition system, the set of openings for establishing flames comprising the primary openings. and the set of openings in the ignition system including the secondary openings, the total area of the sections of openings intended for the establishment of flames is between five and thirty times greater than the total area of the sections of openings of the system ignition. According to one aspect of the invention the total area of the sections of the openings intended for the establishment of flames of the head of the first burner is between five and twenty times greater than the total area of the sections of the openings of the ignition system. the head of the first burner.
Selon un aspect de l'invention l'aire totale des sections des ouvertures destinées à l'établissement de flammes de la tête du second brûleur est entre dix et trente fois supérieure à l'aire totale des sections des ouvertures du système d'allumage de la tête du second brûleur.  According to one aspect of the invention the total area of the sections of the openings for the flame establishment of the head of the second burner is between ten and thirty times greater than the total area of the sections of the openings of the ignition system. the head of the second burner.
Selon un aspect de l'invention l'aire totale des sections des ouvertures destinées à l'établissement de flammes est entre dix et vingt-cinq fois supérieure à l'aire totale des sections des ouvertures du système d'allumage.  According to one aspect of the invention the total area of the sections of the openings for the establishment of flames is between ten and twenty-five times greater than the total area of the sections of the openings of the ignition system.
Selon un aspect de l'invention l'aire totale des sections des ouvertures destinées à l'établissement de flammes de la tête du premier brûleur est entre dix et quinze fois supérieure à l'aire totale des sections des ouvertures du système d'allumage de la tête du premier brûleur.  According to one aspect of the invention the total area of the sections of the openings intended for the establishment of flames of the head of the first burner is between ten and fifteen times greater than the total area of the sections of the openings of the ignition system of the head of the first burner.
Selon un aspect de l'invention l'aire totale des sections des ouvertures destinées à l'établissement de flammes de la tête du second brûleur est entre quinze et vingt-cinq fois supérieure à l'aire totale des sections des ouvertures du système d'allumage de la tête du second brûleur.  According to one aspect of the invention the total area of the sections of the openings for the establishment of flames of the head of the second burner is between fifteen and twenty-five times greater than the total area of the sections of the openings of the system. ignition of the head of the second burner.
De préférence, les ouvertures primaires et les ouvertures secondaires présentent une section circulaire, le diamètre des ouvertures primaires étant compris entre 1 et 1 ,2 mm, et, le diamètre des ouvertures secondaires entre 0,6 et 0,8 mm.  Preferably, the primary openings and the secondary openings have a circular section, the diameter of the primary openings being between 1 and 1.2 mm, and the diameter of the secondary openings between 0.6 and 0.8 mm.
Selon un aspect de l'invention, le dispositif d'inflammation comprend une électrode s'étendant selon un axe présentant une orientation comprise entre 0 et 10° par rapport à l'axe central.  According to one aspect of the invention, the ignition device comprises an electrode extending along an axis having an orientation of between 0 and 10 ° with respect to the central axis.
Selon un aspect de l'invention, l'électrode présente une âme en acier et une couverture en céramique s'étendant axialement, la couverture étant rapportée sur l'âme centrale.  According to one aspect of the invention, the electrode has a steel core and an axially extending ceramic cover, the cover being attached to the central core.
Selon un aspect de l'invention, en position d'utilisation, le panneau transversal s'étend par rapport à l'axe central, en regard d'une portion radiale de l'espace intermédiaire.  According to one aspect of the invention, in the position of use, the transverse panel extends relative to the central axis, facing a radial portion of the intermediate space.
Cette disposition permet une accumulation de gaz dans la zone de recirculation. Selon un aspect de l'invention, la tête du premier brûleur ou du deuxième brûleur comprend une portion cylindrique et une portion transversale par rapport à l'axe central, une pluralité d'orifices étant ménagée dans la portion cylindrique, ladite tête comprenant en outre une bague rapportée en regard de la portion cylindrique, une fente étant ménagée dans une portion supérieure de la bague, les orifices de ladite pluralité d'orifices en regard de la fente constituant au moins une partie des ouvertures secondaires. This arrangement allows a gas accumulation in the recirculation zone. According to one aspect of the invention, the head of the first burner or the second burner comprises a cylindrical portion and a portion transverse to the central axis, a plurality of orifices being formed in the cylindrical portion, said head further comprising a ring attached to the cylindrical portion, a slot being formed in an upper portion of the ring, the orifices of said plurality of orifices opposite the slot constituting at least a portion of the secondary openings.
Selon un aspect de l'invention, une première tôle emboutie comprend la portion cylindrique et la portion transversale, la portion cylindrique et la portion transversale étant d'un seul tenant.  According to one aspect of the invention, a first stamped sheet comprises the cylindrical portion and the transverse portion, the cylindrical portion and the transverse portion being in one piece.
Selon un aspect de l'invention, la tête du premier brûleur ou du deuxième brûleur comprend une seconde tôle emboutie présentant une fenêtre, la tête comprenant en outre une grille rapportée sur la seconde tôle emboutie de manière à recouvrir la fenêtre, la grille étant pourvue de perforations constituant au moins une partie des ouvertures secondaires.  According to one aspect of the invention, the head of the first burner or the second burner comprises a second pressed sheet having a window, the head further comprising a grid attached to the second sheet pressed to cover the window, the gate being provided perforations constituting at least a portion of the secondary openings.
La disposition de la grille dans la fenêtre évite à la flamme générée suite à l'allumage par le dispositif d'allumage de pénétrer dans la chambre correspondante.  The arrangement of the grid in the window prevents the flame generated following ignition by the ignition device from entering the corresponding chamber.
Selon un aspect de l'invention, la grille est soudée par soudure électrique sur la seconde tôle emboutie.  According to one aspect of the invention, the grid is welded by electric welding on the second stamped sheet.
Selon un autre aspect de l'invention, la grille est comprise dans la seconde tôle emboutie et est également réalisée par emboutissage.  According to another aspect of the invention, the grid is included in the second stamped sheet and is also made by stamping.
Selon un aspect de l'invention, le réchaud à gaz comprend une cage de prélèvement pourvue de :  According to one aspect of the invention, the gas stove comprises a sampling cage provided with:
- deux portions latérales orientées radialement par rapport à l'axe central et disposées dans de part et d'autre du dispositif d'inflammation,  two lateral portions oriented radially with respect to the central axis and disposed on either side of the ignition device,
une portion transversale sur laquelle sont rapportées les deux portions latérales, la portion transversale comprenant le panneau transversal.  a transverse portion on which are reported the two side portions, the transverse portion comprising the transverse panel.
Selon un aspect de l'invention, la cage de prélèvement comprend en outre au moins une patte de fixation destinée à être soudée sur la tête du premier brûleur ou du deuxième brûleur.  According to one aspect of the invention, the sampling cage further comprises at least one fixing lug intended to be welded to the head of the first burner or the second burner.
La patte assure la fixation de la cage de prélèvement sur le premier ou le deuxième brûleur.  The tab ensures the fixation of the sampling cage on the first or the second burner.
De toute façon l'invention sera bien comprise à l'aide de la description qui suit en référence aux dessins schématiques annexés représentant, à titre d'exemple non limitatif, une forme d'exécution de ce pour réchaud à gaz. In any case the invention will be better understood with the aid of the description which follows with reference to the attached schematic drawings. representative, by way of non-limiting example, an embodiment of this for a gas stove.
Figure 1 est une vue en perspective d'un réchaud à gaz comprenant un système d'allumage. Figure 1 is a perspective view of a gas stove comprising an ignition system.
Figure 2 est une vue de détail en perspective du système d'allumage et du réchaud à gaz. Figure 3 et 4 sont des vues de détail en perspective d'un dispositif d'inflammation du système d'allumage. Figure 2 is a detailed perspective view of the ignition system and the gas stove. Figure 3 and 4 are detailed perspective views of an igniting device of the ignition system.
Comme illustré à la figure 1 , un réchaud à gaz 1 comprend un premier brûleur 3 et un deuxième brûleur 5, respectivement pourvus d'une première chambre 7 et d'une deuxième chambre 9. As illustrated in FIG. 1, a gas stove 1 comprises a first burner 3 and a second burner 5, respectively provided with a first chamber 7 and a second chamber 9.
La première chambre 7 est sensiblement cylindrique et s'étend selon un axe central 1 1 . La deuxième chambre 9 est annulaire et entoure la première chambre 7 par rapport à l'axe central 1 1 .  The first chamber 7 is substantially cylindrical and extends along a central axis January 1. The second chamber 9 is annular and surrounds the first chamber 7 relative to the central axis January 1.
Le premier brûleur 3 comprend en outre un premier circuit d'alimentation 13 agencé pour alimenter la première chambre 7 en un premier mélange 15. Le premier circuit d'alimentation 13 est également apte à être contrôlé par un utilisateur : son alimentation peut être arrêtée ou régulée.  The first burner 3 further comprises a first supply circuit 13 arranged to feed the first chamber 7 in a first mixture 15. The first supply circuit 13 is also able to be controlled by a user: its power supply can be stopped or regulated.
Le premier mélange 15 comprend un carburant et un comburant : dans le mode réalisation présenté, il s'agit d'un mélange air-gaz, le gaz étant un gaz habituellement utilisé pour les réchauds à gaz.  The first mixture comprises a fuel and an oxidizer: in the embodiment shown, it is an air-gas mixture, the gas being a gas usually used for gas stoves.
Le second brûleur 5 comprend un second circuit d'alimentation 17 en un second mélange 19 de type air-gaz fonctionnant sur le même principe que le premier circuit d'alimentation 13.  The second burner 5 comprises a second feed circuit 17 in a second mixture 19 of air-gas type operating on the same principle as the first feed circuit 13.
Il est à noter que le premier circuit d'alimentation 13 et le second circuit d'alimentation 17 sont totalement indépendants et que leur régulation est également réalisée indépendamment. Il est tout à fait possible de n'alimenter qu'une seule des deux chambres 7, 9 en mélange 15, 19.  It should be noted that the first supply circuit 13 and the second supply circuit 17 are completely independent and that their regulation is also performed independently. It is quite possible to feed only one of the two chambers 7, 9 in mixture 15, 19.
La première chambre 7 et la deuxième chambre 9 sont distantes. Un espace intermédiaire 21 est défini entre les deux chambre 7, 9 et s'étend le long des chambres 7, 9 par rapport à l'axe central 1 1 . L'espace intermédiaire 21 est annulaire et agencé pour permettre la circulation d'air le long de l'axe central 1 1 d'une extrémité inférieure 23 à une extrémité supérieure 25 des chambres 7, 9 en une position d'utilisation du réchaud à gaz 1 . The first chamber 7 and the second chamber 9 are distant. An intermediate space 21 is defined between the two chambers 7, 9 and extends along the chambers 7, 9 with respect to the central axis 1 January. The intermediate space 21 is annular and arranged to allow the flow of air along the central axis 1 1 of a lower end 23 to an upper end 25 of the chambers 7, 9 in a position of use of the stove to gas 1.
La première chambre 7 et la deuxième chambre 9 sont respectivement pourvues d'une première tête 27 et d'une deuxième tête 29. Chaque tête 27, 29 comprend une pluralité d'ouvertures primaires 31 mettant en communication fluidique chaque chambre 7, 9 avec l'extérieur 33.  The first chamber 7 and the second chamber 9 are respectively provided with a first head 27 and a second head 29. Each head 27, 29 comprises a plurality of primary openings 31 placing in fluid communication each chamber 7, 9 with the outside 33.
Les ouvertures primaires 31 sont ainsi destinées à émettre des flammes engendrées par l'inflammation du mélange 15, 19 correspondant, les flammes se fixant au niveau de la tête du brûleur 3, 5 correspondant.  The primary openings 31 are thus intended to emit flames generated by the ignition of the corresponding mixture 15, 19, the flames being fixed at the level of the corresponding burner head 3, 5.
Chaque ouverture primaire 31 présente une section circulaire et s'étend selon un axe primaire 35. Le diamètre des ouvertures primaires 31 est compris entre 1 et 1 ,2 mm. Les axes primaires 35 peuvent avoir des orientations légèrement différentes mais forment avec l'axe central 1 1 un angle inférieur à 10°.  Each primary opening 31 has a circular section and extends along a primary axis 35. The diameter of the primary openings 31 is between 1 and 1.2 mm. The primary axes 35 may have slightly different orientations but form with the central axis 1 1 an angle less than 10 °.
La première tête 27 et la deuxième tête 29 comprennent en outre des ouvertures tierces 37 s'étendant selon un axe 39 présentant un angle pouvant être supérieur à 10° par rapport à l'axe central 1 1 .  The first head 27 and the second head 29 further comprise third openings 37 extending along an axis 39 having an angle that may be greater than 10 ° with respect to the central axis 11.
Comme illustré aux figures 2 à 4, la première tête 27 comprend une première tôle emboutie 41 pourvue d'une portion cylindrique 43 et d'une portion transversale 45.  As illustrated in FIGS. 2 to 4, the first head 27 comprises a first stamped sheet 41 provided with a cylindrical portion 43 and a transverse portion 45.
Des ouvertures primaires 31 et des ouvertures tierces 37 sont ménagées dans la portion transversale 45. La portion cylindrique 43 présente des orifices 47 de section sensiblement circulaire.  Primary openings 31 and third openings 37 are formed in the transverse portion 45. The cylindrical portion 43 has orifices 47 of substantially circular section.
La première tête 27 comprend en outre une bague 49 disposée en regard de la portion cylindrique 43. La bague 49 comprend une portion supérieure 51 présentant une fente 53, des orifices 47 étant en regard de la fente 53.  The first head 27 further comprises a ring 49 disposed opposite the cylindrical portion 43. The ring 49 comprises an upper portion 51 having a slot 53, the orifices 47 being opposite the slot 53.
La seconde tête 29 comprend une seconde tôle emboutie 55 dans laquelle est ménagée une fenêtre 57. La fenêtre 57 est recouverte par une grille 59 pourvue de perforations 61 . Dans le mode de réalisation présenté, la grille 59 est métallique et est fixée par soudure électrique à la seconde tôle emboutie 55. La grille 59 présente en outre une épaisseur réduite par rapport à la seconde tôle emboutie 55, un décrochement 63 apparaissant sur la seconde tête 29 au niveau de la grille 59. The second head 29 comprises a second stamped sheet 55 in which a window 57 is formed. The window 57 is covered by a grid 59 provided with perforations 61. In the embodiment shown, the grid 59 is metallic and is electrically welded to the second pressed sheet 55. The grid 59 furthermore has a reduced thickness relative to the second pressed sheet 55, a recess 63 appearing on the second head 29 at the level of the grid 59.
En position d'utilisation la grille 59 présente une portion sensiblement horizontale 65, une portion intermédiaire arrondie 67 et une portion sensiblement verticale 69, les perforations 61 étant disposées de manière régulière sur ces trois portions 65, 67, 69.  In the position of use the gate 59 has a substantially horizontal portion 65, a rounded intermediate portion 67 and a substantially vertical portion 69, the perforations 61 being arranged in a regular manner on these three portions 65, 67, 69.
Dans une variante de réalisation non présentée la grille 59 peut être comprise dans la seconde tôle emboutie 55 dans ce cas, une géométrie identique à celle présentée dans les figures peut être obtenue lors de l'emboutissage de la seconde tôle emboutie 55.  In an alternative embodiment not presented the grid 59 may be included in the second stamped sheet 55 in this case, a geometry identical to that shown in the figures can be obtained during the stamping of the second stamped sheet 55.
Les orifices 47 et les perforations 61 présentent une section circulaire avec un diamètre compris entre 0,6 et 0,8 mm. Les ouvertures primaires 31 et les ouvertures tierces 37 présentes des sections dont les aires sont du même ordre de grandeur.  The orifices 47 and the perforations 61 have a circular section with a diameter of between 0.6 and 0.8 mm. The primary openings 31 and the third openings 37 present sections whose areas are of the same order of magnitude.
Le réchaud à gaz est pourvu d'un support pour récipient 70. Le réchaud à gaz 1 comprend en outre un système d'allumage 71 disposé dans l'espace intermédiaire 21 , le système d'allumage 71 étant pourvu d'une cage de prélèvement 73 et d'un dispositif d'inflammation 75 de type électrode 77.  The gas stove is provided with a container support 70. The gas stove 1 further comprises an ignition system 71 disposed in the intermediate space 21, the ignition system 71 being provided with a sampling cage 73 and an ignition device 75 of electrode type 77.
Les figures 3 et 4 ne présentent pas la cage de prélèvement pour rendre apparents les autres éléments du système d'allumage 71 . Pour fonctionner, le système d'allumage 71 nécessite la cage de prélèvement 73.  Figures 3 and 4 do not show the sampling cage to make apparent the other elements of the ignition system 71. To function, the ignition system 71 requires the sampling cage 73.
La cage de prélèvement 73 comprend une portion transversale 79, deux portions latérales 81 et deux pattes de fixations 83 destinées à être soudées par soudure électrique la seconde tôle emboutie 55.  The sampling cage 73 comprises a transverse portion 79, two lateral portions 81 and two fastening tabs 83 intended to be welded by electric welding to the second pressed sheet 55.
Les portions latérales 81 sont sensiblement verticales en position d'utilisation et disposées radialement par rapport à l'axe central 1 1 de part et d'autre de l'électrode 77. La portion transversale 79 comprend un panneau transversal 85 disposé au-dessus du dispositif d'inflammation 75.  The lateral portions 81 are substantially vertical in the position of use and arranged radially with respect to the central axis 1 1 on either side of the electrode 77. The transverse portion 79 comprises a transverse panel 85 disposed above the ignition device 75.
L'électrode 77 s'étend selon un axe 87 parallèle à l'axe central 1 1 . The electrode 77 extends along an axis 87 parallel to the central axis January 1.
L'électrode 77 est de type piézoélectrique comprend une âme 89 en acier s'étendant selon l'axe 87 de l'électrode 77 et une couverture 91 en céramique, la couverture 91 étant tubulaire et entourant l'âme 89. The electrode 77 is of piezoelectric type comprises a core 89 of steel extending along the axis 87 of the electrode 77 and a cover 91 of ceramic, the cover 91 being tubular and surrounding the core 89.
Les orifices 47 de la première tête 27 en regard de la fente 53 et les perforations 61 de la grille 59 appartenant à la portion intermédiaire arrondie 67 et la portion sensiblement verticale 69 constituent des ouvertures secondaires 93. The orifices 47 of the first head 27 facing the slot 53 and the perforations 61 of the grid 59 belonging to the intermediate portion rounded 67 and the substantially vertical portion 69 constitute secondary openings 93.
Il convient de distinguer les ouvertures des brûleurs 3, 5 destinées à l'établissement des flammes du réchaud des ouvertures comprises dans le système d'allumage 71 et destinées à l'allumage desdites flammes.  It is appropriate to distinguish the openings of the burners 3, 5 for setting the flames of the stove openings included in the ignition system 71 and for igniting said flames.
L'ensemble d'ouvertures destinées à l'établissement de flammes comprend les ouvertures primaires 31 et les ouvertures tierces 37. L'ensemble d'ouvertures du système d'allumage 71 comprend quant à lui les ouvertures secondaires 93.  The set of openings intended for the establishment of flames comprises the primary openings 31 and the third openings 37. The set of openings of the ignition system 71 comprises meanwhile the secondary openings 93.
L'aire totale des sections, soit la somme des aires de chaque section, des ouvertures destinées à l'établissement de flammes de la première tête 27 est entre dix et quinze fois supérieure à l'aire totale des sections des ouvertures secondaires 93 de la première tête 27.  The total area of the sections, the sum of the areas of each section, openings for the establishment of flames of the first head 27 is between ten and fifteen times greater than the total area of the sections of the secondary openings 93 of the first head 27.
L'aire totale des sections des ouvertures destinées à établissement de flammes de la seconde tête 29 est entre quinze et vingt-cinq fois supérieure à l'aire totale des sections des ouvertures secondaires 93 de la seconde tête 29.  The total area of the flame establishment opening sections of the second head 29 is between fifteen and twenty-five times greater than the total area of the secondary opening sections 93 of the second head 29.
Ce ratio entre les aires de passage du mélange air-gaz est important dans le sens où la plus grande partie du mélange air-gaz est destinée à la formation de flammes.  This ratio between the passage areas of the air-gas mixture is important in the sense that most of the air-gas mixture is intended for the formation of flames.
La plus faible aire de passage des ouvertures secondaires 93 est déterminée pour fournir une quantité de mélange air-gaz suffisante pour permettre une inflammation à proximité de l'électrode 77. Les ouvertures secondaires 93 s'étendent chacune selon un axe secondaire 95 présentant un angle supérieur à 45° par rapport à l'axe central 1 1 .  The smallest passage area of the secondary openings 93 is determined to provide an amount of air-gas mixture sufficient to allow ignition in the vicinity of the electrode 77. The secondary openings 93 each extend along a secondary axis 95 having an angle greater than 45 ° with respect to the central axis 1 1.
Les axes secondaires 45 des ouvertures secondaires 93 de la portion intermédiaire arrondie 67 présentent des angles supérieurs à 45° et inférieurs à 90° tandis que les angles des autres ouvertures secondaires 93 présentent sensiblement égaux à 90°.  The secondary axes 45 of the secondary openings 93 of the rounded intermediate portion 67 have angles greater than 45 ° and less than 90 ° while the angles of the other secondary openings 93 have substantially equal to 90 °.
L'axe 87 de l'électrode 77 est disposé à mi-chemin entre la sortie des ouvertures secondaires 93 présentant un angle de 90° de la première tête 27 et de la deuxième tête 29.  The axis 87 of the electrode 77 is disposed midway between the outlet of the secondary openings 93 having a 90 ° angle of the first head 27 and the second head 29.
En position d'utilisation, le panneau transversal 85 créé une zone de recirculation 97 du premier mélange 15 et/ou du deuxième mélange 19 émis par les ouvertures secondaires 93. En effet, le panneau transversal 85 s'oppose à la dispersion verticale du gaz compris dans le premier mélange 15 et/ou le deuxième mélange 19. In the use position, the transverse panel 85 creates a recirculation zone 97 of the first mixture 15 and / or the second mixture 19 emitted by the secondary openings 93. Indeed, the transverse panel 85 is opposed to the vertical dispersion of the gas included in the first mixture 15 and / or the second mixture 19.
Il est possible de n'alimenter qu'un seul des deux brûleurs 3, 5 en mélange 15, 17, ou les deux simultanément. Le gaz s'accumule alors dans la zone de recirculation 97.  It is possible to feed only one of two burners 3, 5 in mixture 15, 17, or both simultaneously. The gas then accumulates in the recirculation zone 97.
Lorsque la concentration de gaz est suffisante pour engendrer une inflammation dans la zone de recirculation 97, l'électrode 77 est agencée pour émettre une étincelle qui se forme entre l'électrode 77 et la cage de prélèvement 73 ou entre l'électrode 77 et la tête du brûleur 3, 5.  When the concentration of gas is sufficient to cause ignition in the recirculation zone 97, the electrode 77 is arranged to emit a spark which is formed between the electrode 77 and the sampling cage 73 or between the electrode 77 and the electrode 77. burner head 3, 5.
Une fois le mélange enflammé, les flammes se transmettent au niveau la première tête 27 et /ou de la deuxième tête 29 selon l'alimentation en mélange 15, 19. La transmission est due à la proximité des ouvertures primaires 31 et ouvertures tierces 37 avec les flammes en provenance de la zone de recirculation 97.  Once the mixture ignites, the flames are transmitted at the level of the first head 27 and / or the second head 29 according to the mixture supply 15, 19. The transmission is due to the proximity of the primary openings 31 and third openings 37 with the flames coming from the recirculation zone 97.
Lorsqu'un seul brûleur 3, 5 est allumé il n'est pas nécessaire de mettre en œuvre le système d'allumage 71 une seconde fois pour allumer l'autre brûleur 3, 5. La proximité entre les deux brûleurs 3, 5 permet une autoinflammation.  When only one burner 3, 5 is lit it is not necessary to use the ignition system 71 a second time to ignite the other burner 3, 5. The proximity between the two burners 3, 5 allows a Ignition.
Les ouvertures primaires 31 et les ouvertures tierces 37 sont agencées pour que les flammes générées soient sensiblement verticales en position d'utilisation, c'est-à-dire, sensiblement parallèles à l'axe central 1 1 .  The primary openings 31 and the third openings 37 are arranged so that the generated flames are substantially vertical in the position of use, that is to say, substantially parallel to the central axis January 1.
L'espace intermédiaire 21 permet la circulation d'air qui est aspiré par les flammes. Cet air aspiré ou air secondaire participe à la réaction de combustion.  The intermediate space 21 allows the circulation of air which is sucked by the flames. This sucked air or secondary air participates in the combustion reaction.
II ressort de la disposition des ouvertures primaires 31 , des ouvertures tierces 37 et de l'espace intermédiaire 21 que le réchaud à gaz 1 est agencé pour produire des flammes sensiblement verticales.  It emerges from the arrangement of the primary openings 31, third openings 37 and the intermediate space 21 that the gas stove 1 is arranged to produce substantially vertical flames.
Les flammes engendrées sont également plus courtes que les flammes engendrées par d'autres types de brûleurs produisant des flammes obliques. Le réchaud à gaz 1 est ainsi apte à générer des flammes basses résistantes au vent.  The generated flames are also shorter than the flames generated by other types of burners producing oblique flames. The gas stove 1 is thus able to generate low flames resistant to wind.
Le réchaud à gaz 1 est apte à engendrer des flammes verticales basses et comprend en outre un système d'allumage 71 fiable notamment grâce à la présence d'ouvertures secondaires 93 et d'une zone de recirculation 97. En effet les ouvertures primaires 31 et les ouvertures tierces 37 sont agencées pour le mélange 15, 19 s'écoule sensiblement verticalement. Dans ces conditions, l'allumage s'avère compliqué car il faut accumuler une quantité suffisante de gaz à proximité d'une électrode 77. The gas stove 1 is capable of generating low vertical flames and further comprises a reliable ignition system 71, in particular thanks to the presence of secondary openings 93 and a recirculation zone 97. Indeed the primary openings 31 and the third openings 37 are arranged for the mixture 15, 19 flows substantially vertically. Under these conditions, ignition is complicated because it is necessary to accumulate a sufficient quantity of gas near an electrode 77.
En plus de proposer un système d'allumage 71 fiable, le réchaud à gaz 1 ne comprend qu'une électrode 77 apte à allumer chaque brûleur 3, 5 séparément. En comparaison avec deux brûleurs indépendants comprenant chacun un système d'allumage, le réchaud à gaz 1 présenté ne comprend qu'un seul système d'allumage 71 pouvant être utilisé pour l'un des deux brûleurs 3, 5.  In addition to providing a reliable ignition system 71, the gas stove 1 includes only one electrode 77 adapted to ignite each burner 3, 5 separately. In comparison with two independent burners each comprising an ignition system, the gas stove 1 presented comprises only one ignition system 71 that can be used for one of the two burners 3, 5.
Cette disposition permet d'allumer indifféremment un seul des deux brûleurs 3, 5, la cage de prélèvement 73 étant commune aux deux brûleurs 3, 5.  This arrangement makes it possible to switch on only one of the two burners 3, 5, the sampling cage 73 being common to the two burners 3, 5.
Ceci est à comparer avec des réchauds à gaz comprenant plusieurs brûleurs avec un système d'allumage unique ne pouvant allumer qu'un seul des brûleurs. Dans ce cas le réchaud à gaz en question doit en outre comprendre un dispositif de transmission de flammes entre les brûleurs.  This is to be compared with gas stoves comprising several burners with a single ignition system that can ignite only one of the burners. In this case the gas stove in question must further include a device for transmitting flames between the burners.
Le réchaud à gaz 1 présenté a donc une souplesse d'utilisation supplémentaire, l'allumage se résumant à l'ouverture de l'alimentation d'un brûleur 3, 5 et la mise en marche du système d'allumage 71 . De plus une fois un brûleur 3, 5 allumé, il suffit d'alimenter le second brûleur 3, 5 pour que les deux fonctionnent simultanément.  The gas stove 1 presented therefore has an additional flexibility of use, ignition being summed up when opening the supply of a burner 3, 5 and the ignition of the ignition system 71. In addition, once a burner 3, 5 is lit, it is sufficient to supply the second burner 3, 5 so that both operate simultaneously.
Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de ce réchaud à gaz, décrit ci-dessus à titre d'exemple, elle en embrasse au contraire toutes les variantes de réalisation.  As goes without saying, the invention is not limited to the sole embodiment of this gas stove, described above as an example, it encompasses all the variants.

Claims

REVENDICATIONS
1 . Réchaud à gaz (1 ) comprenant :  1. Gas stove (1) comprising:
un premier brûleur (3) pourvu d'une première chambre (7) et d'un premier circuit (13) pour l'alimentation de la première chambre (7), la première chambre (7) étant disposée selon un axe central (1 1 ),  a first burner (3) provided with a first chamber (7) and a first circuit (13) for feeding the first chamber (7), the first chamber (7) being arranged along a central axis (1 1),
un second brûleur (5) pourvu d'une deuxième chambre (9) et d'un deuxième circuit (17) pour l'alimentation de la seconde chambre (9), la seconde chambre (9) étant annulaire et disposée autour de la première chambre (7) par rapport à l'axe central (1 1 ),  a second burner (5) provided with a second chamber (9) and a second circuit (17) for feeding the second chamber (9), the second chamber (9) being annular and arranged around the first chamber (9) chamber (7) with respect to the central axis (1 1),
la première chambre (7) et la deuxième chambre(9) étant distantes, un espace intermédiaire (21 ) s'étendant entre la première chambre (7) et la deuxième chambre(9) par rapport à l'axe central (1 1 ),  the first chamber (7) and the second chamber (9) being spaced apart, an intermediate space (21) extending between the first chamber (7) and the second chamber (9) with respect to the central axis (1 1) ,
chaque brûleur (3, 5) comprenant une tête (27, 29) pourvue d'ouvertures primaires (31 ) agencées pour établir une communication fluidique entre la chambre correspondante (7, 9) et l'extérieur (33), chaque ouverture primaire (31 ) s'étendant selon un axe primaire (35) formant avec l'axe central (1 1 ) un angle compris entre 0° et 10°,  each burner (3, 5) comprising a head (27, 29) provided with primary openings (31) arranged to establish fluid communication between the corresponding chamber (7, 9) and the outside (33), each primary opening ( 31) extending along a primary axis (35) forming with the central axis (1 1) an angle of between 0 ° and 10 °,
un système d'allumage (71 ) comprenant :  an ignition system (71) comprising:
o une pluralité d'ouvertures secondaires (93) ménagées dans chaque tête (27, 29) pour établir une communication fluidique entre la chambre correspondante (7, 9) et l'extérieur (33), chaque ouverture secondaire (93) s'étendant selon un axe secondaire (95) formant avec l'axe central (1 1 ) un angle d'au moins 45°,  a plurality of secondary openings (93) in each head (27, 29) for establishing fluid communication between the corresponding chamber (7, 9) and the outside (33), each secondary opening (93) extending along a secondary axis (95) forming with the central axis (1 1) an angle of at least 45 °,
o un dispositif d'inflammation (75) disposé dans l'espace intermédiaire (21 ), au moins une partie des ouvertures secondaires (93) étant en regard du dispositif d'inflammation (75),  an ignition device (75) disposed in the intermediate space (21), at least a portion of the secondary openings (93) facing the ignition device (75),
o un panneau transversal (85) disposé en regard du dispositif d'inflammation (75) par rapport à l'axe central (1 1 ), le panneau transversal (85) étant au dessus du dispositif d'inflammation (75) en une position d'utilisation du réchaud à gaz (1 ).  a transverse panel (85) disposed facing the ignition device (75) with respect to the central axis (1 1), the transverse panel (85) being above the ignition device (75) at a position use of the gas stove (1).
2. Réchaud à gaz (1 ) selon la revendication 1 , dans lequel au moins une partie des ouvertures secondaires (93) de chaque brûleur (3, 5) est en regard du dispositif d'inflammation (75). 2. Gas stove (1) according to claim 1, wherein at least a portion of the secondary openings (93) of each burner (3, 5) is opposite the ignition device (75).
3. Réchaud à gaz (1 ) selon l'une des revendications précédentes, dans lequel au moins une première partie des ouvertures secondaires (93) s'étend selon des axes secondaires (95) formant des angles avec l'axe central (1 1 ) compris entre 80 et 100°. 3. Gas stove (1) according to one of the preceding claims, wherein at least a first portion of the secondary openings (93) extends along secondary axes (95) forming angles with the central axis (1 1 ) between 80 and 100 °.
4. Réchaud à gaz (1 ) selon l'une des revendications précédentes, dans lequel chaque tête (27, 29) comprend un ensemble d'ouvertures destinées à l'établissement de flammes et un ensemble d'ouvertures du système d'allumage (71 ), Gas stove (1) according to one of the preceding claims, in which each head (27, 29) comprises a set of openings for the establishment of flames and a set of openings of the ignition system ( 71),
l'ensemble d'ouvertures destinées à l'établissement de flammes comprenant les ouvertures primaires (31 ) et l'ensemble d'ouvertures du système d'allumage (71 ) comprenant les ouvertures secondaires (93),  the flame opening arrangement comprising the primary apertures (31) and the aperture assembly of the ignition system (71) including the secondary apertures (93),
l'aire totale des sections des ouvertures destinées à établissement de flammes est entre cinq et trente fois supérieure à l'aire totale des sections des ouvertures du système d'allumage (71 ).  the total area of the sections of the openings for flame establishment is between five and thirty times the total area of the sections of the openings of the ignition system (71).
5. Réchaud à gaz (1 ) selon l'une des revendications précédentes, dans lequel le dispositif d'inflammation (75) comprend une électrode (77) s'étendant selon un axe (87) présentant une orientation comprise entre 0 et 10° par rapport à l'axe central (1 1 ). 5. Gas stove (1) according to one of the preceding claims, wherein the ignition device (75) comprises an electrode (77) extending along an axis (87) having an orientation of between 0 and 10 ° relative to the central axis (1 1).
6. Réchaud à gaz (1 ) selon l'une des revendications précédentes, dans lequel, en position d'utilisation, le panneau transversal (85) s'étend par rapport à l'axe central (1 1 ), en regard d'une portion radiale de l'espace intermédiaire (21 ). 6. Gas stove (1) according to one of the preceding claims, wherein, in the position of use, the transverse panel (85) extends relative to the central axis (1 1), opposite a radial portion of the intermediate space (21).
7. Réchaud à gaz (1 ) selon l'une des revendications précédentes, dans lequel la tête (27, 29) du premier brûleur (3) ou du deuxième brûleur (5) comprend une portion cylindrique (43) et une portion transversale (45) par rapport à l'axe central (1 1 ), une pluralité d'orifices (47) étant ménagée dans la portion cylindrique (43), 7. Gas stove (1) according to one of the preceding claims, wherein the head (27, 29) of the first burner (3) or the second burner (5) comprises a cylindrical portion (43) and a transverse portion ( 45) relative to the central axis (1 1), a plurality of orifices (47) being formed in the cylindrical portion (43),
ladite tête (27, 29) comprenant en outre une bague (49) rapportée en regard de la portion cylindrique (43), une fente (53) étant ménagée dans une portion supérieure (51 ) de la bague (49), les orifices (47) de ladite pluralité d'orifices (47) en regard de la fente (53) constituant au moins une partie des ouvertures secondaires (93). said head (27, 29) further comprising a ring (49) attached to the cylindrical portion (43), a slot (53) being formed in an upper portion (51) of the ring (49), the orifices ( 47) of said plurality of orifices (47) facing the slot (53) constituting at least a portion of the secondary openings (93).
8. Réchaud à gaz (1 ) selon la revendication précédente, dans lequel une première tôle emboutie (41 ) comprend la portion cylindrique (43) et la portion transversale (45), la portion cylindrique (45) et la portion transversale (43) étant d'un seul tenant. 8. Gas stove (1) according to the preceding claim, wherein a first stamped sheet (41) comprises the cylindrical portion (43) and the transverse portion (45), the cylindrical portion (45) and the transverse portion (43). being in one piece.
9. Réchaud à gaz (1 ) selon l'une des revendications précédentes, dans lequel la tête (27, 29) du premier brûleur (3) ou du deuxième brûleur (5) comprend une seconde tôle emboutie (55) présentant une fenêtre (57), la tête (27, 29) comprenant en outre une grille (59) rapportée sur la seconde tôle emboutie (55) de manière à recouvrir la fenêtre (57), la grille (59) étant pourvue de perforations (61 ) constituant au moins une partie des ouvertures secondaires (93). 9. Gas stove (1) according to one of the preceding claims, wherein the head (27, 29) of the first burner (3) or the second burner (5) comprises a second pressed sheet (55) having a window ( 57), the head (27, 29) further comprising a grid (59) attached to the second pressed sheet (55) so as to cover the window (57), the grid (59) being provided with perforations (61) constituting at least a portion of the secondary openings (93).
10. Réchaud à gaz (1 ) selon l'une des revendications précédentes, comprenant une cage de prélèvement (73) pourvue de : 10. Gas stove (1) according to one of the preceding claims, comprising a sampling cage (73) provided with:
deux portions latérales (79) orientées radialement par rapport à l'axe central (1 1 ) et disposées dans de part et d'autre du dispositif d'inflammation (75),  two lateral portions (79) oriented radially with respect to the central axis (1 1) and arranged on either side of the ignition device (75),
- une portion transversale (81 ) sur laquelle sont rapportées les deux portions latérales (81 ), la portion transversale (79) comprenant le panneau transversal (85).  - A transverse portion (81) on which are reported the two side portions (81), the transverse portion (79) comprising the transverse panel (85).
1 1 . Réchaud à gaz (1 ) selon la revendication précédente, dans lequel la cage de prélèvement (73) comprend en outre au moins une patte de fixation (83) destinée à être soudée sur la tête (27, 29) du premier brûleur (3) ou du deuxième brûleur (5). 1 1. Gas stove (1) according to the preceding claim, wherein the sampling cage (73) further comprises at least one fixing lug (83) intended to be welded to the head (27, 29) of the first burner (3) or the second burner (5).
EP15726232.0A 2014-06-19 2015-05-04 Gas stove including a lighting system for two burners Withdrawn EP3158265A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1455625A FR3022614B1 (en) 2014-06-19 2014-06-19 GAS STOVE COMPRISING AN IGNITION SYSTEM FOR TWO BURNERS
PCT/FR2015/051180 WO2015193565A1 (en) 2014-06-19 2015-05-04 Gas stove including a lighting system for two burners

Publications (1)

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EP3158265A1 true EP3158265A1 (en) 2017-04-26

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EP15726232.0A Withdrawn EP3158265A1 (en) 2014-06-19 2015-05-04 Gas stove including a lighting system for two burners

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EP (1) EP3158265A1 (en)
FR (1) FR3022614B1 (en)
WO (1) WO2015193565A1 (en)

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Publication number Priority date Publication date Assignee Title
DE202019100482U1 (en) * 2019-01-28 2019-02-06 Enders Colsman Ag Gas powered flame bowl

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR786709A (en) * 1935-02-25 1935-09-09 Single and double burner gas stove
US2215711A (en) * 1938-09-26 1940-09-24 Ervin H Mueller Gas burner
US4943232A (en) * 1990-01-24 1990-07-24 Lin Whang Tung Ignition device for a gas burner
ITRN20070012A1 (en) * 2007-02-27 2008-08-28 Indesit Company Spa COOKTOP
US8973569B2 (en) * 2009-02-18 2015-03-10 Electrolux Home Products, Inc. Gas burner
FR2999276B1 (en) * 2012-12-10 2014-12-12 Applic Gaz Sa GAS BURNER COMPRISING A BURNER HEAD

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FR3022614B1 (en) 2017-03-10
WO2015193565A1 (en) 2015-12-23

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