EP3384208B1 - Gas burner with multiple rings of flames having two parallel venturis, one above the other - Google Patents

Gas burner with multiple rings of flames having two parallel venturis, one above the other Download PDF

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Publication number
EP3384208B1
EP3384208B1 EP15807963.2A EP15807963A EP3384208B1 EP 3384208 B1 EP3384208 B1 EP 3384208B1 EP 15807963 A EP15807963 A EP 15807963A EP 3384208 B1 EP3384208 B1 EP 3384208B1
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EP
European Patent Office
Prior art keywords
burner
gas
pipe
central
annular
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.)
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Application number
EP15807963.2A
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German (de)
French (fr)
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EP3384208A1 (en
Inventor
Christophe Trochou
Fabienne MEREAU
Gilles MONGAY
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.)
Nouvelle Sourdillon Ste
Original Assignee
Nouvelle Sourdillon Ste
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Publication of EP3384208A1 publication Critical patent/EP3384208A1/en
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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
    • F23D14/02—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
    • 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
    • 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
    • F24C3/08—Arrangement or mounting of burners
    • 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
    • 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
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges

Definitions

  • the invention relates to assemblies formed by a top plate of a cooking appliance, in particular for household use, and in particular to gas burners with multiple crowns of flames which are suitable for being mounted on such a plate.
  • Such burners generally include a central burner and an annular burner, surrounding the central burner.
  • Such burners are used when significant heating power is required and / or, in conjunction with respective gas supply devices for the central and annular burners, when modulation of the heating power is required (Asian cuisine by example).
  • burners with multiple flame crowns provided with a central burner with a peripheral flame crown and an annular burner, surrounding the central burner, provided with one or two flame crowns: an inner flame crown and an outer flame crown.
  • the annular burner may also have only one outer flame ring.
  • the object of the invention is therefore to propose a gas burner with multiple flame crowns of an improved type, the structure of which is suitable for allowing it to be placed both on a conventional cooker and on a thin baking sheet. (less than 3 cm).
  • a burner with multiple flame crowns is constituted in which the mixture of gas and air jets passing through the first Venturi and supplying the external burner head is also used to supply the internal burner head, because the Venturi supplying the interior burner head communicates with the Venturi of the exterior burner head. This optimizes the space occupied by the burner body.
  • the length of the Venturi (and therefore the performance of the interior burner head) can be increased without affecting the vertical size of the assembly.
  • the invention also relates to an assembly comprising at least one gas burner as defined above and a cooking plate.
  • the axis of the first duct is positioned below the plate plane of the cooking plate and the axis of the second duct is positioned above the hob plate plane.
  • the assembly has an occupancy height much lower than that of known assemblies.
  • the second duct is enclosed between the cooking plate, on the one hand, and the central burner and the annular burner, on the other hand. Thanks to this arrangement, the second conduit is preserved from any introduction of dirt, which facilitates cleaning of the assembly.
  • the assembly includes at least one primary air inlet located below the plate.
  • the assembly includes a gas burner comprising an internal burner head 1 (or central burner), which is in the central position, having a peripheral flame crown (flame passages 2) and at least one external burner head 3 ( or annular burner), which is annular and remotely surrounds the central burner head 1, having at least one ring of flames, interior and / or exterior.
  • the annular external burner head 3 has an external flame ring (flame passages 4).
  • the interior 1 and exterior 3 burner heads are produced in one piece. This has the advantage of reducing the number of parts in the assembly according to the invention.
  • the interior 1 and exterior 3 burner heads thus form a single piece which, by means of a burner body 6, is capable of being mounted on a cooking plate P.
  • the cooking plate P is, for example a stove plate or a cooking plate. It is visible on the drawings of Figures 1 to 3 .
  • the plate P extends substantially along a plane of the plate P1.
  • the burner body 6 is visible in particular on the figures 1 , 2 and 4 .
  • This burner body 6 has here a relatively elongated shape, substantially in correspondence with the diameter of the external burner head 3 which surmounts said body.
  • the burner body 6 is arranged to be fixed, by fixing means, at least partially under the plate P from above a cooking appliance.
  • the figure 4 shows in particular that the burner body 6 is bordered, at least partially at substantially mid-height, with a fixing flange 70, punctually having holes 71.
  • the plate P has a cutout 72 corresponding substantially to the shape of the section of the burner body 6, to accommodate the burner body 6 ( figure 3 ).
  • Holes 73 are also produced around the cutout 72. Some holes 73 come in vertical correspondence with the holes 71 of the flange 70 of the burner body when the latter is positioned in the cutout 71 of the plate p.
  • Fixing means such as nuts and screws (not shown) placed in the holes 71 and 73, secure the burner body 6 to the plate P.
  • a gas inlet 8 At one end of the burner body 6 is a gas inlet 8, which can be connected to a gas supply via control means (not shown) which are preferably specific to it.
  • the gas inlet 8 is in communication with a gas injector 9 located coaxially opposite one end of a conduit 10 first convergent, then divergent and forming tubular Venturi, which extends substantially over the greater part of the length of the burner body 6, that is to say of the diameter of the outer burner head 3, along an axis parallel to the plane P1.
  • the primary air intake lumen is supplied with air through a through opening 80 and / or through the opening 81 made through the burner body 6, in the vicinity of the gas injector 9.
  • the burner body 6 is produced in two parts which can be assembled together.
  • a first part 60 which comprises the conduit 10 and a part 61 which comprises a housing for the injector and which can be assembled at one end of the part 60, opposite the inlet of the conduit 10.
  • the arrow F on the figure 4 shows the place where part 61 should be positioned in relation to part 60 to assemble them together.
  • the figure 2 shows that the end 62 of the part 60 is inserted into the end 62 of the part 61.
  • parts 60 and 61 could be made in one piece.
  • the duct 10 is in connection with a substantially vertical well 12 bringing the air-gas mixture into the external burner head 3.
  • the burner body 6 comprises a second duct 5 forming a tubular Venturi, which extends parallel to the duct 10, also substantially over a part of the length of the burner body 6.
  • the second duct 5 is disposed above the duct 10 and in opposite direction: the inlet 50 of the conduit 5 is from the well 12 and the outlet of the second conduit 5 is through an opening 51 made on the top of the conduit 5, near its end 52 opposite the end 53 comprising the inlet 50 of the second conduit 5.
  • the second conduit 5 communicates with the well 12 and the air / gas mixture circulating in the conduit 12 is also sucked into the second conduit 5 in which it also circulates.
  • the outlet opening 51 of the second conduit 5 opens into a corridor 54 which opens substantially at the center 59 of the central burner head 1, which makes it possible to conduct the air / gas mixture as far as the central burner head 1.
  • the external burner head 3 comprises an annular chamber 22 located in the vicinity of the external periphery of this head.
  • Chamber 22 is formed by a channel defined by a bottom 23 and two concentric side walls 24, 25 and by an annular cover or cap 26 covering said channel ( figure 1 ).
  • In the wall 25 are made notches forming flame passages 4.
  • the notches forming the flame passages are of different depths to allow better combustion and a non-fragile crown of flames.
  • the bottom 23 of the chamber has an opening 27, which is positioned opposite the substantially vertical well 11 (above) of the burner body 6 when the assembly is assembled ( figure 2 ).
  • annular cap 26 is guided, during its installation, and retained in position by positioning fingers 28 integral with the external burner head 3.
  • the external burner head 3 is arranged so that between a central region which will be discussed later and the chamber annular 22, it includes lights 29 which open up this intermediate annular zone.
  • the external burner head 3 is secured to the central burner head 1 at least by means of bridges 31 produced between the central burner head 1 and a positioning finger 28, secured to the concentric side wall 24 of the external burner head 3.
  • the central interior burner head 1 has a central region, which has a central opening 34.
  • the central opening coincides with the exit from the corridor 54 mentioned above, which makes it possible to guide the air / gas mixture leaving the second duct 5 towards a central region of the central interior burner head 1.
  • the passage 54 is formed partially by the upper part of the burner body 6 having projections, and partially by a part of the central burner head assembled with the burner body 6.
  • the figure 4 illustrating the burner body 6, shows a projecting part in the shape of a rectangle 55 provided on the upper part of the burner body 6.
  • the solid bottom 56 of the interior space delimited by the projecting part in the shape of a rectangle 55 is produced by the wall of the burner body and it is situated substantially at the same level as that of the outlet end 51 of the second duct 5.
  • the solid bottom 56 forms the bottom of the corridor 54.
  • the side walls of the corridor 54 are formed in part by the projecting part in the shape of a rectangle 55, and by the side walls of a hollow part in the shape of a parallelepiped 57 which connects the side wall 24 of the external burner 3 and the internal burner 1 .
  • the passage 54 is formed between the projecting part in the form of a rectangle 55 and the hollow part in the form of a parallelepiped 57.
  • the central burner head 1 has a peripheral wall 35 which is pierced with notches 2, of different depths, forming flame passages (see figures 3 and 5 especially).
  • a cap or cover 36 rests on the wall 35 (see figure 1 ).
  • the external burner head 3 is, as is often the case for gas burners, bordered below by a peripheral annular skirt 38 inclined downwards.
  • This skirt can be an integral part of the burner head 3, or it can be an annular piece attached removably to the burner head 3: this annular piece 38 can be put in place by means of suitable shoulders, for example.
  • the burner body 6 when it is fixed to the plate P, occupies a space above the plate P and a space below the plate P, which further reduces the bulk of the body burner under the plate P and allows the burner body to be installed in very small spaces such as, for example, under a hob of reduced thickness (less than 3 cm).
  • the arrows F1 show schematically the path followed by the primary air which, from the opening 80 (air coming from below the hob P) or from the upper end of the primary air intake lumen 11 (air arriving from above the cooking plate P), arrives at the inlet of the conduit 10 and simultaneously, passing through the well 12 and arrives at the conduit 5.
  • thermocouple Th and / or a single electric ignition member Al are provided, which are then associated in operation with the single central burner.
  • the burner body 6 has housings 74 and 75 in its fixing flange 70 to receive, respectively, at least one thermocouple Th and at least one electric ignition member Al.
  • the second embodiment includes the same burner heads 1 and 3 made in one piece and the same plate P as the assembly shown in Figures 1 to 5 .
  • the burner body 6 of this second example has special features that the burner body 6 of the first embodiment does not have and which will be developed now: As more easily visible to figures 6 and 7 , the burner body 6 in the second embodiment comprises a second gas inlet 13 distinct from the aforementioned first inlet 8, and arranged, here, on the side of the body 6, perpendicular to the axes of the two conduits 10 and 5.
  • the gas inlet 13 can be connected to a gas supply via control means (not shown) which preferably are specific to it and are distinct from the control means for feeding the first gas inlet 8.
  • the burner body 6 of the embodiment shown in Figures 1 to 5 also includes this second gas supply.
  • the second arrival in the first embodiment is carried out by a blind hole.
  • the well 12 of the burner body is not in communication with the second duct 5 in this second embodiment.
  • the burner body 6 of the second embodiment and of the first embodiment can be produced by machining the same basic burner body: particular machining operations are thus carried out depending on whether one wishes to carry out a burner body with one or two gas inlets.
  • the gas inlet 13 is in communication with a gas injector 14 which is directed parallel to the second Venturi 5, and therefore parallel to the first gas injector 9: at the figure 7 , the axis of the injector 14 is substantially horizontal and substantially parallel to the axes of the conduits 10 and 5.
  • the gas injector 14 is positioned at one end of the second conduit 5 (end forming the inlet 50 of the conduit 5), opposite to the outlet 51 of the conduit 5 (the outlet 5 corresponds to the upward opening of the body of burner 6).
  • the communication between the gas inlet 13 and the second gas injector 14 takes place by means of a conduit 15 pierced through the burner body 6, visible more particularly in figure 8 .
  • the duct 15 is straight and has a first end 16 open in the gas inlet duct 13 and a second end 17 which opens at the rear of the second gas injector 14 (see figures 7 and 8 ).
  • the second gas injector 14 is positioned in a cutout 18 made in the burner body 6 upstream of the second conduit 5 forming Venturi.
  • the cutout 18 of the burner body 6 is placed under a second parallelepipedic part 58 connecting the two burner heads 1 and 3, the second parallelepipedic part 58 being in the extension of the first parallelepipedic part 57, according to the diameter of the head of external annular burner (see figure 7 ).
  • the second parallelepiped part is produced by walls connecting the concentric side wall of the annular outer burner head 3 and the peripheral wall of the central inner burner head 1. Just like the first parallelepiped part 57, the second parallelepiped part 58 is open downwards so as to form a cover above the cutout 18 made in the burner body 6.
  • the cutout 18 thus receives the gas injector 14 and allows a primary air intake F1 on either side of the injector 14 under the second rectangular part 58.
  • the body of burner 6 forms a primary air intake chamber around the second injector 14 thanks to the cutout 18.
  • the duct 15 which extends the second gas inlet 13 opens into the chamber d air intake in the vicinity of the second injector 14.

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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)

Description

L'invention a trait aux ensembles formés par une plaque de dessus d'un appareil de cuisson, notamment à usage ménager, et particulièrement aux brûleurs à gaz à multiples couronnes de flammes qui sont propres à être montés sur une telle plaque.The invention relates to assemblies formed by a top plate of a cooking appliance, in particular for household use, and in particular to gas burners with multiple crowns of flames which are suitable for being mounted on such a plate.

De tels brûleurs comportent généralement un brûleur central et un brûleur annulaire, entourant le brûleur central.Such burners generally include a central burner and an annular burner, surrounding the central burner.

De tels brûleurs sont utilisés lorsqu'une puissance de chauffe importante est requise et/ou, en conjonction avec des dispositifs respectifs d'alimentation en gaz des brûleurs central et annulaire, lorsqu'une modulation de la puissance de chauffe est requise (cuisine asiatique par exemple).Such burners are used when significant heating power is required and / or, in conjunction with respective gas supply devices for the central and annular burners, when modulation of the heating power is required (Asian cuisine by example).

On connait déjà notamment des brûleurs à multiples couronnes de flammes pourvus d'un brûleur central à une couronne de flamme périphérique et d'un brûleur annulaire, entourant le brûleur central, pourvu d'une ou deux couronnes de flammes : une couronne de flamme intérieure et une couronne de flamme extérieure. Le brûleur annulaire peut également ne comporter qu'une seule couronne de flamme extérieure.We already know in particular burners with multiple flame crowns provided with a central burner with a peripheral flame crown and an annular burner, surrounding the central burner, provided with one or two flame crowns: an inner flame crown and an outer flame crown. The annular burner may also have only one outer flame ring.

Le document EP 1 120 603 décrit, par exemple, de tels brûleurs.The document EP 1,120,603 describes, for example, such burners.

Le document EP 2 053 309 A1 décrit un brûleur comportant les caractéristiques spécifiées dans le préambule de la revendication 1.The document EP 2,053,309 A1 describes a burner having the characteristics specified in the preamble of claim 1.

A l'origine de l'invention, on a cherché à rendre plus compact l'ensemble décrit dans le document EP 1 120 603 et à améliorer encore les performances de tels brûleurs.At the origin of the invention, we sought to make the assembly described in the document more compact. EP 1,120,603 and to further improve the performance of such burners.

En effet, et même si le document explique que la structure qu'il décrit est compacte, il a été constaté qu'elle ne l'est pas assez pour être montée sur une plaque de cuisson dont l'épaisseur ne dépasse guère 4 cm.Indeed, and even if the document explains that the structure it describes is compact, it has been found that it is not enough to be mounted on a baking sheet whose thickness hardly exceeds 4 cm.

L'invention a donc pour but de proposer un brûleur à gaz à multiples couronnes de flammes d'un type amélioré, dont la structure soit propre à autoriser sa mise en place aussi bien sur une cuisinière conventionnelle que sur une plaque de cuisson de faible épaisseur (inférieure à 3 cm).The object of the invention is therefore to propose a gas burner with multiple flame crowns of an improved type, the structure of which is suitable for allowing it to be placed both on a conventional cooker and on a thin baking sheet. (less than 3 cm).

A ces fins, l'invention concerne un brûleur à gaz à multiple couronnes de flammes, propre à être monté sur une plaque de dessus d'un appareil de cuisson notamment à usage ménager, la plaque de dessus s'étendant sensiblement suivant un plan de plaque, ledit brûleur à gaz comportant :

  • un brûleur central possédant une couronne de flammes périphériques et au moins un brûleur annulaire possédant au moins une couronne de flammes périphériques, ledit brûleur annulaire entourant le brûleur central,
  • et un corps de brûleur propre à être fixé sur ladite plaque de dessus,
    ledit corps de brûleur comportant au moins une première arrivée de gaz communiquant avec un premier injecteur de gaz situé en regard d'un premier conduit convergeant-divergeant formant Venturi, ledit premier conduit présentant un axe apte à s'étendre sensiblement parallèlement audit plan de plaque, ledit premier conduit s'étendant sur au moins la plus grande partie d'une étendue transversale du corps de brûleur,
    ledit premier conduit étant, à son extrémité opposée audit premier injecteur de gaz, en communication avec un puits sensiblement perpendiculaire audit axe dudit premier conduit, ledit puits étant ouvert vers le haut et apte à alimenter ledit brûleur annulaire avec un mélange air/gaz,
    ledit corps de brûleur comportant un second conduit formant Venturi situé au-dessus dudit premier conduit,
    ledit second conduit présentant une extrémité en communication avec une ouverture vers le haut du corps de brûleur, apte à alimenter ledit brûleur central avec un mélange air/gaz.
    Le brûleur conforme à l'invention est remarquable en ce que l'axe du second conduit est parallèle à l'axe du premier conduit.
For these purposes, the invention relates to a gas burner with multiple flame crowns, suitable for being mounted on a top plate of a cooking appliance in particular for household use, the top plate extending substantially along a plate plane, said gas burner comprising:
  • a central burner having a ring of peripheral flames and at least one annular burner having at least one ring of peripheral flames, said annular burner surrounding the central burner,
  • and a burner body suitable for being fixed on said top plate,
    said burner body comprising at least a first gas inlet communicating with a first gas injector situated opposite a first converging-diverging duct forming Venturi, said first duct having an axis capable of extending substantially parallel to said plate plane , said first duct extending over at least the greatest part of a transverse extent of the burner body,
    said first duct being, at its end opposite to said first gas injector, in communication with a well substantially perpendicular to said axis of said first duct, said well being open upwards and capable of supplying said annular burner with an air / gas mixture,
    said burner body comprising a second venturi duct situated above said first duct,
    said second duct having one end in communication with an opening towards the top of the burner body, capable of supplying said central burner with an air / gas mixture.
    The burner according to the invention is remarkable in that the axis of the second conduit is parallel to the axis of the first conduit.

Grâce à la structure adoptée, on constitue un brûleur à multiples couronnes de flammes dans lequel le mélange de jets de gaz et d'air traversant le premier Venturi et alimentant la tête de brûleur extérieur est utilisé également pour alimenter la tête de brûleur intérieur, car le Venturi alimentant la tête de brûleur intérieur communique avec le Venturi de la tête de brûleur extérieur. On optimise ainsi l'espace d'occupation de corps de brûleur.Thanks to the structure adopted, a burner with multiple flame crowns is constituted in which the mixture of gas and air jets passing through the first Venturi and supplying the external burner head is also used to supply the internal burner head, because the Venturi supplying the interior burner head communicates with the Venturi of the exterior burner head. This optimizes the space occupied by the burner body.

De plus, en orientant horizontalement le Venturi d'alimentation de la tête de brûleur intérieur, et en positionnant l'un sur l'autre les deux Venturi, on limite l'occupation en hauteur de l'ensemble, ce qui permet de créer des ensembles peu encombrant en hauteur, pouvant être monté sur une plaque de cuisson d'épaisseur réduite.In addition, by horizontally orienting the supply Venturi for the interior burner head, and by positioning the two Venturi on top of each other, the height occupation of the assembly is limited, which makes it possible to create sets space-saving in height, can be mounted on a hob of reduced thickness.

Egalement, en orientant horizontalement le Venturi d'alimentation de la tête de brûleur intérieur, on peut augmenter la longueur du Venturi (et donc les performances de la tête de brûleur intérieur) sans conséquence sur l'encombrement vertical de l'ensemble.Also, by horizontally orienting the supply Venturi of the interior burner head, the length of the Venturi (and therefore the performance of the interior burner head) can be increased without affecting the vertical size of the assembly.

L'ensemble conforme à l'invention peut également comporter les caractéristiques suivantes, prises séparément ou en combinaison :

  • Le second conduit peut comporter une seconde extrémité ouverte dans ledit puits, de sorte que le mélange air/gaz dudit premier conduit circule également dans ledit second conduit. Cela permet d'utiliser une seule arrivée de gaz pour alimenter les deux brûleurs centrale et annulaire.
  • Le corps de brûleur peut comporter une seconde arrivée de gaz communiquant avec un second injecteur de gaz situé en regard du second conduit formant Venturi, le second injecteur de gaz étant positionné à une seconde extrémité dudit second conduit formant Venturi, ladite seconde extrémité étant opposée à ladite extrémité en communication avec l'ouverture vers le haut du corps de brûleur, ledit second injecteur de gaz étant orienté parallèlement audit premier injecteur de gaz.
  • Le brûleur central et le brûleur annulaire peuvent comporter respectivement chacun une tête de brûleur central et une tête de brûleur annulaire et, respectivement, un chapeau de brûleur central et un chapeau de brûleur annulaire.
  • La tête de brûleur central et la tête de brûleur annulaire peuvent être réalisées en une seule pièce. Cela facilite le montage du bruleur.
  • La tête de brûleur central assemblée au corps de brûleur peut former un couloir parallèle à l'axe des premier et second conduits formant Venturi, le couloir pouvant présenter une entrée de couloir réalisée par l'ouverture vers le haut du corps de brûleur et une sortie de couloir débouchant sensiblement au centre de la tête de brûleur central.
  • En amont du second conduit formant Venturi, le corps de brûleur peut former avec la tête de brûleur central, une chambre d'admission d'air autour dudit second injecteur de gaz.
  • Ladite seconde arrivée de gaz peut déboucher dans ladite chambre d'admission d'air au voisinage dudit second injecteur de gaz.
  • La tête de brûleur annulaire peut comporter une chambre annulaire bordée au moins mono-latéralement par des passages de flammes et possédant en son fond une ouverture en communication avec ledit puits. De plus, la tête de brûleur central peut comporter une chambre de brûleur central comportant une ouverture apte à communiquer avec l'ouverture vers le haut du corps de brûleur.
  • Au voisinage de ladite au moins une première arrivée de gaz, le corps de brûleur peut comporter une ouverture d'admission d'air au voisinage de l'entrée dudit premier conduit formant Venturi.
  • Le brûleur annulaire peut être entouré inférieurement d'une jupe périphérique inclinée vers le bas, la jupe périphérique étant de préférence réalisée amovible.
  • Le brûleur peut comprendre au moins un thermocouple de détection de présence de flammes et/ ou au moins un organe d'allumage électrique et ledit au moins un thermocouple et/ou ledit au moins un organe d'allumage électrique peuvent être fonctionnellement associés au brûleur central.
The assembly according to the invention may also include the following characteristics, taken separately or in combination:
  • The second conduit may have a second end open in said well, so that the air / gas mixture of said first conduit also circulates in said second conduit. This allows a single gas supply to be used to supply the two central and annular burners.
  • The burner body may include a second gas inlet communicating with a second gas injector located opposite the second venturi duct, the second gas injector being positioned at a second end of said second venturi duct, said second end being opposite to said end in communication with the opening upwards of the burner body, said second gas injector being oriented parallel to said first gas injector.
  • The central burner and the annular burner may each include a central burner head and an annular burner head and, respectively, a central burner cap and an annular burner cap.
  • The central burner head and the annular burner head can be made in one piece. This facilitates the mounting of the burner.
  • The central burner head assembled with the burner body can form a passage parallel to the axis of the first and second venturi ducts, the passage possibly having a hallway entry made by the opening upwards of the burner body and a hallway exit opening out substantially in the center of the central burner head.
  • Upstream of the second venturi duct, the burner body can form, with the central burner head, an air intake chamber around said second gas injector.
  • Said second gas inlet can open into said air intake chamber in the vicinity of said second gas injector.
  • The annular burner head may comprise an annular chamber bordered at least mono-laterally by flame passages and having at its bottom an opening in communication with said well. In addition, the central burner head may include a central burner chamber having an opening adapted to communicate with the upward opening of the burner body.
  • In the vicinity of said at least one first gas inlet, the burner body may include an air intake opening in the vicinity of the inlet of said first venturi duct.
  • The annular burner may be surrounded below by a peripheral skirt inclined downwards, the peripheral skirt preferably being made removable.
  • The burner can comprise at least one flame detection thermocouple and / or at least one electric ignition member and said at least one thermocouple and / or said at least one electric ignition member can be functionally associated with the central burner .

L'invention vise également un ensemble comportant au moins un brûleur à gaz tel que défini précédemment et une plaque de cuisson.The invention also relates to an assembly comprising at least one gas burner as defined above and a cooking plate.

Suivant un mode de réalisation avantageux, l'axe du le premier conduit est positionné au-dessous du plan de plaque de la plaque de cuisson et l'axe du second conduit est positionné au-dessus du plan de plaque de la plaque de cuisson. Ainsi réalisé, l'ensemble présente une hauteur d'occupation bien inférieure à celles des ensembles connus.According to an advantageous embodiment, the axis of the first duct is positioned below the plate plane of the cooking plate and the axis of the second duct is positioned above the hob plate plane. Thus produced, the assembly has an occupancy height much lower than that of known assemblies.

Selon une variante de réalisation, également, le second conduit est enfermé entre la plaque de cuisson, d'une part, et le brûleur central et le bruleur annulaire, d'autre part. Grâce à cette disposition, le second conduit est préservé de toute introduction de saleté, ce qui facilite le nettoyage de l'ensemble.According to an alternative embodiment, also, the second duct is enclosed between the cooking plate, on the one hand, and the central burner and the annular burner, on the other hand. Thanks to this arrangement, the second conduit is preserved from any introduction of dirt, which facilitates cleaning of the assembly.

Selon encore un mode de réalisation avantageux, l'ensemble comporte au moins une arrivée d'air primaire située au-dessous de la plaque.According to yet another advantageous embodiment, the assembly includes at least one primary air inlet located below the plate.

L'invention sera mieux comprise à la lecture de la description détaillée qui suit de certains modes de réalisation donnés uniquement à titre d'exemples nullement limitatifs. Dans cette description, on se réfère aux dessins annexés sur lesquels :

  • la figure 1 est une vue en perspective d'un ensemble conforme à un premier mode de réalisation selon l'invention ;
  • la figure 2 est une vue en coupe de l'ensemble, suivant le plan II-II montré en figure 1 ;
  • la figure 3 est une vue éclatée de l'ensemble montré en figure 1 ;
  • la figure 4 est un agrandissement de la partie IV indiquée en figure 3, montrant en perspective le corps de brûleur de l'ensemble montré sur les figures 1 à 3 ;
  • la figure 5 est un agrandissement de la partie V indiquée en figure 3, montrant en perspective les têtes de brûleurs de l'ensemble montré sur les figures 1 à 3;
  • la figure 6 est une vue en perspective d'un ensemble selon un second mode de réalisation conforme à l'invention,
  • la figure 7 est une vue en coupe longitudinale suivant le plan VII-VII montré en figure 6,
  • et la figure 8 est une vue en coupe transversale suivant le plan VIII-VIII montré en figure 6.
The invention will be better understood on reading the detailed description which follows of certain embodiments given solely by way of non-limiting examples. In this description, reference is made to the appended drawings in which:
  • the figure 1 is a perspective view of an assembly according to a first embodiment according to the invention;
  • the figure 2 is a sectional view of the assembly, along the plane II-II shown in figure 1 ;
  • the figure 3 is an exploded view of the assembly shown in figure 1 ;
  • the figure 4 is an enlargement of part IV indicated in figure 3 , showing in perspective the burner body of the assembly shown on the Figures 1 to 3 ;
  • the figure 5 is an enlargement of part V indicated in figure 3 , showing in perspective the burner heads of the assembly shown on the Figures 1 to 3 ;
  • the figure 6 is a perspective view of an assembly according to a second embodiment in accordance with the invention,
  • the figure 7 is a view in longitudinal section along the plane VII-VII shown in figure 6 ,
  • and the figure 8 is a cross-sectional view along the plane VIII-VIII shown in figure 6 .

Dans la description qui suit, les termes « inférieur », « supérieur », « haut », « bas » etc... sont utilisés en référence aux dessins pour une plus grande facilité de compréhension. Ils ne doivent pas être compris comme étant des limitations de la portée de l'invention.In the following description, the terms "lower", "upper", "high", "low" etc ... are used with reference to the drawings for greater ease of understanding. They should not be understood as being limitations on the scope of the invention.

Il sera tout d'abord fait référence à un premier mode de réalisation illustré sur les figures 1 à 5.Firstly, reference will be made to a first embodiment illustrated on the Figures 1 to 5 .

Le second mode de réalisation illustré en figures 6 à 8 sera décrit par la suite.The second embodiment illustrated in figures 6 to 8 will be described later.

En se reportant tout d'abord à la figure 1, l'ensemble comporte un brûleur à gaz comprenant une tête de brûleur intérieur 1 (ou brûleur central), qui est en position centrale, possédant une couronne de flammes périphérique (passages de flammes 2) et au moins une tête de brûleur extérieur 3 (ou brûleur annulaire), qui est annulaire et entoure à distance la tête de brûleur central 1, possédant au moins une couronne de flammes, intérieure et/ou extérieure. Dans l'exemple illustré dans l'ensemble des figures, la tête de brûleur extérieur annulaire 3 possède une couronne de flammes extérieure (passages de flammes 4).Referring first to the figure 1 , the assembly includes a gas burner comprising an internal burner head 1 (or central burner), which is in the central position, having a peripheral flame crown (flame passages 2) and at least one external burner head 3 ( or annular burner), which is annular and remotely surrounds the central burner head 1, having at least one ring of flames, interior and / or exterior. In the example illustrated in all the figures, the annular external burner head 3 has an external flame ring (flame passages 4).

Il est à noter que les deux modes de réalisation illustrés et présentés en figures 1 à 8 comportent les mêmes têtes de brûleur 1 et 3.It should be noted that the two embodiments illustrated and presented in figures 1 to 8 have the same burner heads 1 and 3.

De plus dans les deux modes de réalisation qui sont présentés, les têtes de brûleur intérieur 1 et extérieur 3 sont réalisées en une seule pièce. Cela présente l'avantage de réduire le nombre de pièces que comporte l'ensemble conforme à l'invention.In addition, in the two embodiments which are presented, the interior 1 and exterior 3 burner heads are produced in one piece. This has the advantage of reducing the number of parts in the assembly according to the invention.

Les têtes de brûleur intérieur 1 et extérieur 3 forme ainsi une seule pièce qui, par l'intermédiaire d'un corps de brûleur 6, est apte à être montée sur une plaque de cuisson P.The interior 1 and exterior 3 burner heads thus form a single piece which, by means of a burner body 6, is capable of being mounted on a cooking plate P.

La plaque de cuisson P est, par exemple une plaque de cuisinière ou une plaque de cuisson. Elle est visible sur les dessins des figures 1 à 3. La plaque P s'étend suivant sensiblement un plan de plaque P1.The cooking plate P is, for example a stove plate or a cooking plate. It is visible on the drawings of Figures 1 to 3 . The plate P extends substantially along a plane of the plate P1.

Le corps de brûleur 6 est visible en particulier sur les figures 1, 2 et 4. Ce corps de brûleur 6 présente ici une forme relativement allongée, sensiblement en correspondance avec le diamètre de la tête de brûleur extérieur 3 qui surmonte ledit corps.The burner body 6 is visible in particular on the figures 1 , 2 and 4 . This burner body 6 has here a relatively elongated shape, substantially in correspondence with the diameter of the external burner head 3 which surmounts said body.

Le corps de brûleur 6 est agencé pour être fixé, par des moyens de fixation, au moins partiellement sous la plaque P de dessus d'un appareil de cuisson.The burner body 6 is arranged to be fixed, by fixing means, at least partially under the plate P from above a cooking appliance.

La figure 4 montre en particulier que le corps de brûleur 6 est bordé, au moins partiellement en sensiblement à mi-hauteur, d'une collerette 70 de fixation, présentant ponctuellement des perçages 71.The figure 4 shows in particular that the burner body 6 is bordered, at least partially at substantially mid-height, with a fixing flange 70, punctually having holes 71.

La plaque P présente une découpe 72 correspondant sensiblement à la forme de la section du corps de brûleur 6, pour accueillir le corps de brûleur 6 (figure 3).The plate P has a cutout 72 corresponding substantially to the shape of the section of the burner body 6, to accommodate the burner body 6 ( figure 3 ).

Des perçages 73 sont également réalisés autour de la découpe 72. Certains perçages 73 viennent en correspondance verticale avec les perçages 71 de la collerette 70 du corps de brûleur quand ce dernier est positionné dans la découpe 71 de la plaque p.Holes 73 are also produced around the cutout 72. Some holes 73 come in vertical correspondence with the holes 71 of the flange 70 of the burner body when the latter is positioned in the cutout 71 of the plate p.

Des moyens de fixation, tels que les écrous et des vis (non représentées) placés dans les perçages 71 et 73, assurent la fixation du corps de brûleur 6 sur la plaque P.Fixing means, such as nuts and screws (not shown) placed in the holes 71 and 73, secure the burner body 6 to the plate P.

A une extrémité du corps de brûleur 6 se trouve une arrivée de gaz 8, raccordable à une alimentation en gaz via des moyens de contrôle (non montrés) qui de préférence lui sont propres.At one end of the burner body 6 is a gas inlet 8, which can be connected to a gas supply via control means (not shown) which are preferably specific to it.

Comme on le voit à la figure 2, l'arrivée de gaz 8 est en communication avec un injecteur de gaz 9 situé coaxialement en regard d'une extrémité d'un conduit 10 d'abord convergent, puis divergent et formant Venturi tubulaire, qui s'étend sensiblement sur la plus grande partie de la longueur du corps de brûleur 6, c'est-à-dire du diamètre de la tête de brûleur extérieur 3, suivant un axe parallèle au plan P1.As seen in the figure 2 , the gas inlet 8 is in communication with a gas injector 9 located coaxially opposite one end of a conduit 10 first convergent, then divergent and forming tubular Venturi, which extends substantially over the greater part of the length of the burner body 6, that is to say of the diameter of the outer burner head 3, along an axis parallel to the plane P1.

Entre l'injecteur de gaz 9 et le conduit 10 se trouve une lumière 11 d'admission d'air primaire. La lumière d'admission d'air primaire est alimentée en air par une ouverture traversante 80 et/ ou par l'ouverture 81 réalisée au travers du corps de brûleur 6, au voisinage de l'injecteur 9 de gaz.Between the gas injector 9 and the duct 10 is a port 11 for primary air intake. The primary air intake lumen is supplied with air through a through opening 80 and / or through the opening 81 made through the burner body 6, in the vicinity of the gas injector 9.

Plus précisément, dans le cadre de l'exemple illustrée, le corps de brûleur 6 est réalisé en deux parties assemblables ensemble. Une première partie 60 qui comporte le conduit 10 et une partie 61 qui comporte un logement d'accueil pour l'injecteur et qui est assemblable à une extrémité de la partie 60, en face de l'entrée du conduit 10. La flèche F sur la figure 4 montre l'endroit où il convient de positionner la pièce 61 par rapport à la pièce 60 pour les assembler ensemble.More specifically, in the context of the example illustrated, the burner body 6 is produced in two parts which can be assembled together. A first part 60 which comprises the conduit 10 and a part 61 which comprises a housing for the injector and which can be assembled at one end of the part 60, opposite the inlet of the conduit 10. The arrow F on the figure 4 shows the place where part 61 should be positioned in relation to part 60 to assemble them together.

La figure 2 montre que l'extrémité 62 de la pièce 60 s'insère dans l'extrémité 62 de la pièce 61.The figure 2 shows that the end 62 of the part 60 is inserted into the end 62 of the part 61.

Il devra être noté que les pièces 60 et 61 pourraient être réalisées en une seule pièce.It should be noted that parts 60 and 61 could be made in one piece.

A son extrémité terminale, le conduit 10 est en liaison avec un puits sensiblement vertical 12 amenant le mélange air-gaz dans la tête de brûleur extérieur 3.At its terminal end, the duct 10 is in connection with a substantially vertical well 12 bringing the air-gas mixture into the external burner head 3.

Comme on le voit également sur la figure 2, le corps de brûleur 6 comporte un second conduit 5 formant Venturi tubulaire, qui s'étend parallèlement au conduit 10, également sensiblement sur une partie de la longueur du corps de brûleur 6. Le second conduit 5 est disposé dessus le conduit 10 et en sens inverse : l'entrée 50 du conduit 5 se fait depuis le puits 12 et la sortie du second conduit 5 se fait par une ouverture 51 réalisée sur le dessus du conduit 5, au voisinage de son extrémité 52 opposée à l'extrémité 53 comportant l'entrée 50 du second conduit 5.As can also be seen on the figure 2 , the burner body 6 comprises a second duct 5 forming a tubular Venturi, which extends parallel to the duct 10, also substantially over a part of the length of the burner body 6. The second duct 5 is disposed above the duct 10 and in opposite direction: the inlet 50 of the conduit 5 is from the well 12 and the outlet of the second conduit 5 is through an opening 51 made on the top of the conduit 5, near its end 52 opposite the end 53 comprising the inlet 50 of the second conduit 5.

Ainsi réalisé, le second conduit 5 communique avec le puits 12 et le mélange air/gaz circulant dans le conduit 12 est également happé dans le second conduit 5 dans lequel il circule également.Thus produced, the second conduit 5 communicates with the well 12 and the air / gas mixture circulating in the conduit 12 is also sucked into the second conduit 5 in which it also circulates.

L'ouverture de sortie 51 du second conduit 5 débouche dans un couloir 54 qui débouche sensiblement au centre 59 de la tête de brûleur central 1, ce qui permet de conduire le mélange air/gaz jusque dans la tête de brûleur central 1.The outlet opening 51 of the second conduit 5 opens into a corridor 54 which opens substantially at the center 59 of the central burner head 1, which makes it possible to conduct the air / gas mixture as far as the central burner head 1.

Il devra être noté que, dans une variante de réalisation, il pourrait y avoir plusieurs sorties 51 qui déboucheraient dans le couloir 54.It should be noted that, in an alternative embodiment, there could be several exits 51 which would lead into the corridor 54.

Il va maintenant être fait plus particulièrement référence aux têtes de brûleur intérieur 1 et extérieur 3 en faisant référence aux figures 1, 2, 3 et 5.Reference will now be made more particularly to the interior 1 and exterior 3 burner heads with reference to the figures 1 , 2 , 3 and 5 .

La tête de brûleur extérieur 3 comporte une chambre annulaire 22 située au voisinage de la périphérie externe de cette tête. La chambre 22 est formée par un canal défini par un fond 23 et deux parois latérales concentriques 24, 25 et par un couvercle ou chapeau annulaire 26 coiffant ledit canal (figure 1). Dans la paroi 25 sont pratiquées des encoches formant des passages de flammes 4.The external burner head 3 comprises an annular chamber 22 located in the vicinity of the external periphery of this head. Chamber 22 is formed by a channel defined by a bottom 23 and two concentric side walls 24, 25 and by an annular cover or cap 26 covering said channel ( figure 1 ). In the wall 25 are made notches forming flame passages 4.

Dans l'exemple illustré, les encoches formant les passages de flammes sont de profondeurs différentes pour permettre une meilleure combustion et une couronne de flammes non fragile.In the example illustrated, the notches forming the flame passages are of different depths to allow better combustion and a non-fragile crown of flames.

Comme visible en particulier à la figure 5, le fond 23 de la chambre présente une ouverture 27, qui se positionne en regard du puits sensiblement vertical 11 (précité) du corps de brûleur 6 quand l'ensemble est assemblé (figure 2).As seen especially at the figure 5 , the bottom 23 of the chamber has an opening 27, which is positioned opposite the substantially vertical well 11 (above) of the burner body 6 when the assembly is assembled ( figure 2 ).

Comme visible en particulier en figure 2, le chapeau annulaire 26 est guidé, lors de sa mise en place, et retenu en position par des doigts de positionnement 28 solidaires de la tête de brûleur extérieur 3.As visible in particular figure 2 , the annular cap 26 is guided, during its installation, and retained in position by positioning fingers 28 integral with the external burner head 3.

Comme en figure 5, la tête de brûleur extérieur 3 est agencée de sorte qu'entre une région centrale dont il sera question plus loin et la chambre annulaire 22, elle comporte des lumières 29 qui ajourent cette zone annulaire intermédiaire.As in figure 5 , the external burner head 3 is arranged so that between a central region which will be discussed later and the chamber annular 22, it includes lights 29 which open up this intermediate annular zone.

Enfin, la tête de brûleur extérieur 3 est solidaire de la tête de brûleur central 1 au moins par l'intermédiaire de ponts 31 réalisés entre la tête de brûleur central 1 et un doigt de positionnement 28, solidaire de la paroi latérale concentrique 24 de la tête de brûleur extérieur 3.Finally, the external burner head 3 is secured to the central burner head 1 at least by means of bridges 31 produced between the central burner head 1 and a positioning finger 28, secured to the concentric side wall 24 of the external burner head 3.

Plus précisément, la tête de brûleur intérieur central 1 présente une région centrale, qui comporte une ouverture centrale 34.More specifically, the central interior burner head 1 has a central region, which has a central opening 34.

L'ouverture centrale coïncide avec la sortie du couloir 54 évoqué précédemment, qui permet de guider le mélange air/gaz sortant du second conduit 5 vers une région centrale de la tête de brûleur intérieur central 1.The central opening coincides with the exit from the corridor 54 mentioned above, which makes it possible to guide the air / gas mixture leaving the second duct 5 towards a central region of the central interior burner head 1.

Plus précisément, le couloir 54 est formé partiellement par la partie supérieure du corps de brûleur 6 présentant des saillies, et partiellement par une partie de la tête de brûleur central assemblée au corps de brûleur 6.More precisely, the passage 54 is formed partially by the upper part of the burner body 6 having projections, and partially by a part of the central burner head assembled with the burner body 6.

La figure 4, illustrant le corps de brûleur 6, montre une partie saillante en forme de rectangle 55 prévue sur la partie supérieure du corps de brûleur 6.The figure 4 , illustrating the burner body 6, shows a projecting part in the shape of a rectangle 55 provided on the upper part of the burner body 6.

A l'intérieur de l'espace délimité par la partie saillante en forme de rectangle, se trouve l'extrémité 51 de sortie du second conduit 5 formant Venturi.Inside the space delimited by the projecting part in the shape of a rectangle, is the outlet end 51 of the second conduit 5 forming Venturi.

Le fond plein 56 de l'espace intérieur délimité par la partie saillante en forme de rectangle 55 est réalisé par la paroi du corps de brûleur et il se situe sensiblement au même niveau que celui de l'extrémité de sortie 51 du second conduit 5.The solid bottom 56 of the interior space delimited by the projecting part in the shape of a rectangle 55 is produced by the wall of the burner body and it is situated substantially at the same level as that of the outlet end 51 of the second duct 5.

Le fond plein 56 forme le fond du couloir 54.The solid bottom 56 forms the bottom of the corridor 54.

Les parois latérales du couloir 54 sont formées en partie par la partie saillante en forme de rectangle 55, et par les parois latérales d'une partie creuse en forme de parallélépipède 57 qui relie la paroi latérale 24 du brûleur extérieur 3 et le brûleur intérieur 1.The side walls of the corridor 54 are formed in part by the projecting part in the shape of a rectangle 55, and by the side walls of a hollow part in the shape of a parallelepiped 57 which connects the side wall 24 of the external burner 3 and the internal burner 1 .

Ainsi, lorsque la tête de brûleur central (ou intérieur) 1 est assemblée au corps de brûleur 6, le couloir 54 est formé entre la partie saillante en forme de rectangle 55 et partie creuse en forme de parallélépipède 57.Thus, when the central (or interior) burner head 1 is assembled with the burner body 6, the passage 54 is formed between the projecting part in the form of a rectangle 55 and the hollow part in the form of a parallelepiped 57.

Le couloir 54 présente un axe parallèle à l'axe des premier et second conduits 10 et 5 (respectivement) et comporte :

  • une entrée de couloir, réalisée par une ouverture vers le haut du corps de brûleur 6 correspondant à la sortie du second conduit 5, et
  • une sortie de couloir, qui débouche sensiblement au centre du brûleur central 1, de manière que le mélange air/gaz en provenance du puits 12 soit délivré au centre du brûleur central interne 1.
Corridor 54 has an axis parallel to the axis of the first and second conduits 10 and 5 (respectively) and comprises:
  • a corridor entry, produced by an opening towards the top of the burner body 6 corresponding to the exit of the second duct 5, and
  • a corridor outlet, which opens substantially at the center of the central burner 1, so that the air / gas mixture from the well 12 is delivered to the center of the internal central burner 1.

La tête de brûleur central 1 comporte une paroi périphérique 35 qui est percée d'encoches 2, de profondeurs différentes, formant des passages de flammes (voir figures 3 et 5 notamment). Un chapeau ou couvercle 36 repose sur la paroi 35 (voir figure 1).The central burner head 1 has a peripheral wall 35 which is pierced with notches 2, of different depths, forming flame passages (see figures 3 and 5 especially). A cap or cover 36 rests on the wall 35 (see figure 1 ).

Enfin, on notera que la tête de brûleur extérieur 3 est, comme cela est souvent le cas pour les brûleurs à gaz, bordée inférieurement par une jupe annulaire périphérique 38 inclinée vers le bas. Cette jupe peut être partie intégrante de la tête de brûleur 3, ou bien peut être une pièce annulaire rapportée de façon amovible sur la tête de brûleur 3 : cette pièce annulaire 38 peut être mise en place grâce à des épaulements appropriés, par exemple.Finally, it will be noted that the external burner head 3 is, as is often the case for gas burners, bordered below by a peripheral annular skirt 38 inclined downwards. This skirt can be an integral part of the burner head 3, or it can be an annular piece attached removably to the burner head 3: this annular piece 38 can be put in place by means of suitable shoulders, for example.

En outre, il devient alors aisé de conformer et/ou de décorer cette pièce annulaire de façons diverses afin de satisfaire par exemple les exigences commerciales.In addition, it then becomes easy to shape and / or decorate this annular part in various ways in order to satisfy, for example, commercial requirements.

Les dispositions structurelles qui viennent d'être décrites conduisent à un brûleur à gaz à multiples couronnes dont les têtes de brûleur 1 et 3 ne fonctionnent qu'avec une seule arrivée de gaz. En faisant communiquer entre eux deux conduits formant Venturi, il est possible d'alimenter deux têtes de brûleurs différentes. En disposant les deux conduits formant Venturi parallèles l'un à l'autre et l'un au-dessus de l'autre, parallèlement au plan P1 de la plaque P, le corps de brûleur occupe un espace limité en hauteur et en largeur.The structural arrangements which have just been described lead to a gas burner with multiple crowns the burner heads 1 and 3 of which operate with only one gas inlet. By communicating between them two conduits forming Venturi, it is possible to supply two different burner heads. By arranging the two parallel Venturi ducts one to the other and one above the other, parallel to the plane P1 of the plate P, the burner body occupies a space limited in height and in width.

Il sera également noté que le corps de brûleur 6, quand il est fixé sur la plaque P, occupe un espace au-dessus de la plaque P et un espace au-dessous de la plaque P, ce qui réduit encore l'encombrement du corps de brûleur sous la plaque P et permet d'installer le corps de brûleur dans des espaces très petits comme, par exemple, sous une plaque de cuisson d'épaisseur réduite (moins de 3 cm).It will also be noted that the burner body 6, when it is fixed to the plate P, occupies a space above the plate P and a space below the plate P, which further reduces the bulk of the body burner under the plate P and allows the burner body to be installed in very small spaces such as, for example, under a hob of reduced thickness (less than 3 cm).

Sur la figure 2, on a schématisé par les flèches F1 le trajet suivi par l'air primaire qui, depuis l'ouverture 80 (air provenant de dessous la plaque de cuisson P) ou depuis l'extrémité supérieure de la lumière d'admission d'air primaire 11 (air arrivant de dessus la plaque de cuisson P), parvient à l'entrée du conduit 10 et simultanément, traversant le puits 12 et parvient au niveau du conduit 5.On the figure 2 , the arrows F1 show schematically the path followed by the primary air which, from the opening 80 (air coming from below the hob P) or from the upper end of the primary air intake lumen 11 (air arriving from above the cooking plate P), arrives at the inlet of the conduit 10 and simultaneously, passing through the well 12 and arrives at the conduit 5.

Quant à l'air secondaire qui doit parvenir aux pieds des flammes, ses trajets sont schématisés par les flèches en tirets F2. Il provient pour partie de l'extérieur du brûleur pour la couronne de flammes externes, et d'air extérieur arrivant par les ouvertures 29 (flèches F3) pour la couronne de flammes intérieures du brûleur central 1.As for the secondary air which must reach the feet of the flames, its paths are shown diagrammatically by the arrows in dash F2. It partly comes from the outside of the burner for the external flame ring, and from outside air arriving through the openings 29 (arrows F3) for the internal flame ring of the central burner 1.

On notera enfin que, pour simplifier la structure du brûleur et réduire son coût, on prévoit un seul thermocouple Th et/ou un seul organe d'allumage électrique Al qui sont alors associés en fonctionnement au seul brûleur central.Finally, it will be noted that, to simplify the structure of the burner and reduce its cost, a single thermocouple Th and / or a single electric ignition member Al are provided, which are then associated in operation with the single central burner.

Comme on le voit mieux à la figure 4, le corps de brûleur 6 comporte des logements 74 et 75 dans sa collerette de fixation 70 pour accueillir, respectivement, au moins un thermocouple Th et au moins un organe d'allumage électrique Al.As we can see better at the figure 4 , the burner body 6 has housings 74 and 75 in its fixing flange 70 to receive, respectively, at least one thermocouple Th and at least one electric ignition member Al.

Il va maintenant être fait référence à une seconde de mode de réalisation présenté sur les figures 6 à 8.Reference will now be made to a second embodiment presented on the figures 6 to 8 .

Les mêmes références ont été conservées pour désigner les éléments communs aux deux modes de réalisation.The same references have been kept to designate the elements common to the two embodiments.

Le second mode de réalisation comporte les mêmes têtes de brûleurs 1 et 3 réalisées en une seule pièce et la même plaque P que l'ensemble montré en figures 1 à 5.The second embodiment includes the same burner heads 1 and 3 made in one piece and the same plate P as the assembly shown in Figures 1 to 5 .

Il comporte également sensiblement le même corps de brûleur 6, car il comprend notamment l'arrivée de gaz 8, l'injecteur 9, les deux conduits 10 et 5 formant Venturi. Toutefois, le corps de brûleur 6 de ce second exemple comporte des particularités que le corps de brûleur 6 du premier exemple de réalisation ne comporte pas et qui vont être développées maintenant :
Comme visible plus facilement aux figures 6 et 7, le corps de brûleur 6 dans le second mode de réalisation comporte une seconde arrivée de gaz 13 distincte de la première arrivée 8 précitée, et disposée, ici, sur le côté du corps 6, perpendiculairement aux axes des deux conduits 10 et 5.It also includes substantially the same burner body 6, since it notably comprises the gas inlet 8, the injector 9, the two conduits 10 and 5 forming Venturi. However, the burner body 6 of this second example has special features that the burner body 6 of the first embodiment does not have and which will be developed now:
As more easily visible to figures 6 and 7 , the burner body 6 in the second embodiment comprises a second gas inlet 13 distinct from the aforementioned first inlet 8, and arranged, here, on the side of the body 6, perpendicular to the axes of the two conduits 10 and 5.

L'arrivée de gaz 13 est raccordable à une alimentation en gaz via des moyens de contrôle (non montrés) qui de préférence lui sont propres et sont distincts des moyens de contrôle d'alimentation de la première arrivée de gaz 8.The gas inlet 13 can be connected to a gas supply via control means (not shown) which preferably are specific to it and are distinct from the control means for feeding the first gas inlet 8.

Il est à noter que le corps de brûleur 6 du mode de réalisation montré en figures 1 à 5 comporte également cette seconde arrivée de gaz. Toutefois, la seconde arrivée dans le premier mode de réalisation est réalisée par un trou borgne.It should be noted that the burner body 6 of the embodiment shown in Figures 1 to 5 also includes this second gas supply. However, the second arrival in the first embodiment is carried out by a blind hole.

Il est à noter également que le puits 12 du corps de brûleur n'est pas en communication avec le second conduit 5 dans ce second mode de réalisation.It should also be noted that the well 12 of the burner body is not in communication with the second duct 5 in this second embodiment.

Ainsi, on comprend que le corps de brûleur 6 du second mode de réalisation et du premier mode de réalisation peut être réalisé par usinage d'un même corps de brûleur de base : des usinages particuliers sont ainsi réalisés suivant que l'on souhaite réaliser un corps de brûleur avec une ou deux arrivées de gaz.Thus, it is understood that the burner body 6 of the second embodiment and of the first embodiment can be produced by machining the same basic burner body: particular machining operations are thus carried out depending on whether one wishes to carry out a burner body with one or two gas inlets.

Dans le second mode de réalisation, l'arrivée de gaz 13 est en communication avec un injecteur de gaz 14 qui est dirigé parallèlement au second Venturi 5, et donc parallèlement au premier injecteur de gaz 9 : à la figure 7, l'axe de l'injecteur 14 est sensiblement horizontal et sensiblement parallèle aux axes des conduits 10 et 5.In the second embodiment, the gas inlet 13 is in communication with a gas injector 14 which is directed parallel to the second Venturi 5, and therefore parallel to the first gas injector 9: at the figure 7 , the axis of the injector 14 is substantially horizontal and substantially parallel to the axes of the conduits 10 and 5.

L'injecteur de gaz 14 est positionné à une extrémité du second conduit 5 (extrémité formant l'entrée 50 du conduit 5), opposée à la sortie 51 du conduit 5 (la sortie 5 correspond à l'ouverture vers le haut du corps de brûleur 6).The gas injector 14 is positioned at one end of the second conduit 5 (end forming the inlet 50 of the conduit 5), opposite to the outlet 51 of the conduit 5 (the outlet 5 corresponds to the upward opening of the body of burner 6).

La communication entre l'arrivée de gaz 13 et le second injecteur de gaz 14 se fait au moyen d'un conduit 15 percé à travers le corps de brûleur 6, visible plus particulièrement en figure 8.The communication between the gas inlet 13 and the second gas injector 14 takes place by means of a conduit 15 pierced through the burner body 6, visible more particularly in figure 8 .

Le conduit 15 est rectiligne et présente une première extrémité 16 ouverte dans le conduit d'arrivée de gaz 13 et une seconde extrémité 17 qui débouche à l'arrière du second injecteur de gaz 14 (voir figures 7 et 8).The duct 15 is straight and has a first end 16 open in the gas inlet duct 13 and a second end 17 which opens at the rear of the second gas injector 14 (see figures 7 and 8 ).

Le second injecteur de gaz 14 est positionné dans une découpe 18 réalisée dans le corps de brûleur 6 en amont du second conduit 5 formant Venturi.The second gas injector 14 is positioned in a cutout 18 made in the burner body 6 upstream of the second conduit 5 forming Venturi.

La découpe 18 du corps de brûleur 6 se place sous une seconde partie parallélépipédique 58 reliant les deux têtes de brûleurs 1 et 3, la seconde partie parallélépipédique 58 se trouvant dans le prolongement de la première partie parallélépipédique 57, suivant le diamètre de la tête de brûleur extérieur annulaire (voir figure 7).The cutout 18 of the burner body 6 is placed under a second parallelepipedic part 58 connecting the two burner heads 1 and 3, the second parallelepipedic part 58 being in the extension of the first parallelepipedic part 57, according to the diameter of the head of external annular burner (see figure 7 ).

La seconde partie parallélépipédique est réalisée par des parois reliant la paroi latérale concentrique de la tête de brûleur extérieur annulaire 3 et la paroi périphérique de la tête de brûleur intérieur central 1. Tout comme la première partie parallélépipédique 57, la seconde partie parallélépipédique 58 est ouverte vers le bas de sorte à former un couvercle au-dessus de la découpe 18 réalisée dans le corps de brûleur 6.The second parallelepiped part is produced by walls connecting the concentric side wall of the annular outer burner head 3 and the peripheral wall of the central inner burner head 1. Just like the first parallelepiped part 57, the second parallelepiped part 58 is open downwards so as to form a cover above the cutout 18 made in the burner body 6.

La découpe 18 accueille ainsi l'injecteur de gaz 14 et permet une admission d'air primaire F1 de part et d'autre de l'injecteur 14 sous la seconde partie parallélépipédique 58. Ainsi, en amont du second conduit 5, le corps de brûleur 6 forme une chambre d'admission d'air primaire autour du second injecteur 14 grâce à la découpe 18. Par ailleurs, grâce au corps de brûleur ainsi réalisé, le conduit 15 qui prolonge la seconde arrivée de gaz 13 débouche dans la chambre d'admission d'air au voisinage du second injecteur 14.The cutout 18 thus receives the gas injector 14 and allows a primary air intake F1 on either side of the injector 14 under the second rectangular part 58. Thus, upstream of the second conduit 5, the body of burner 6 forms a primary air intake chamber around the second injector 14 thanks to the cutout 18. Furthermore, thanks to the burner body thus produced, the duct 15 which extends the second gas inlet 13 opens into the chamber d air intake in the vicinity of the second injector 14.

Grâce à ce second mode de réalisation, on peut commander indépendamment le fonctionnement du brûleur central 1 ou du brûleur annulaire 3.Thanks to this second embodiment, the operation of the central burner 1 or of the annular burner 3 can be independently controlled.

Claims (16)

  1. Gas burner with multiple rings of flames, suitable for mounting on a top plate (P) of a cooking appliance in particular for household use, the top plate (P) extending substantially in a plate plane (P1),
    said gas burner comprising:
    - a central burner (1) having a ring of peripheral flames and at least one annular burner (3) having at least one ring of peripheral flames, said annular burner (3) surrounding the central burner,
    - and a burner body (6) suitable for attachment to said top plate (P),
    said burner body (6) comprising at least a first gas inlet (8) communicating with a first gas injector (9) situated facing a first convergent-divergent pipe (10) forming a Venturi tube, said first pipe (10) having an axis substantially parallel to said plate plane (P1), said first pipe (10) extending over at least the greater portion of a transverse extension of the burner body (6),
    said first pipe (10) being, at its end opposite to said first gas injector (9), in communication with a shaft (12) substantially perpendicular to said axis of said first pipe (10), said shaft (12) being open at the top and adapted to supply said annular burner (3) with an air/gas mixture,
    said burner body (6) comprising a second pipe (5) forming a Venturi tube, situated above said first pipe (10),
    said second pipe (5) having one end (52) in communication with an opening (51) at the top of the burner body (6), adapted to supply said central burner (1) with an air/gas mixture,
    characterized in that the axis of the second pipe is parallel to the axis of the first pipe (10).
  2. Gas burner according to claim 1, wherein the second pipe (5) comprises a second open end (53) in said shaft (12), such that the air/gas mixture from said first pipe (10) also flows in said second pipe (5).
  3. Gas burner according to claim 1, wherein the burner body (6) comprises a second gas inlet (13) communicating with a second gas injector (14) situated facing the second pipe (5) forming a Venturi tube, the second gas injector (14) being positioned at a second end of said second pipe (5) forming a Venturi tube, said second end being opposite to said end (52) in communication with the opening (51) at the top of the burner body (6), said second gas injector (14) being oriented to be parallel to said first gas injector (9).
  4. Gas burner according to any one of the preceding claims, wherein the central burner (1) and the annular burner (3) each respectively comprise a central burner head (1) and an annular burner head (3), and respectively a central burner cap (36) and an annular burner cap (26).
  5. Gas burner according to claim 4, wherein the central burner head (1) and the annular burner head (3) are made as one part.
  6. Gas burner according to any one of claims 4 or 5, wherein the central burner head (1) assembled to the burner body (6) forms a passage (54) parallel to the axis of the first and second pipes (10, 5) forming Venturi tubes, the passage (54) having a passage inlet (51) formed by the opening (51) at the top of the burner body (6) and a passage outlet which opens substantially into the center (59) of the central burner head (1).
  7. Gas burner according to any one of claims 4 to 6 and comprising the features of claim 3, wherein, upstream of the second pipe (5) forming a Venturi tube, the burner body (5) forms, with the central burner head (1), an air intake chamber (18) around said second gas injector (14).
  8. Gas burner according to claims 3 and 7, wherein said second gas inlet (13) opens into said air intake chamber (18) in proximity to said second gas injector (14).
  9. Gas burner according to any one of claims 4 to 7, wherein the annular burner head (3) comprises an annular chamber (22) bordered at least unilaterally by flame outlet openings (4) and having at its bottom (23) an opening (27) in communication with said shaft (12),
    and wherein the central burner head (1) comprises a central burner chamber having an opening (59) adapted to communicate with the opening (51) at the top of the burner body (6).
  10. Gas burner according to any one of the preceding claims, wherein, adjacent to said at least first gas inlet (8), the burner body (6) comprises an air intake opening (80) in proximity to the inlet of said first pipe (10) forming a Venturi tube.
  11. Gas burner according to any one of the preceding claims, wherein the annular burner (3) is surrounded at the base by a downwardly inclined peripheral skirt (38), this peripheral skirt (38) preferably being removable.
  12. Gas burner according to any one of the preceding claims, wherein it comprises at least one flame detection thermocouple (Th) and/or at least one electric ignition member (A I), and wherein said at least one thermocouple (Th) and/or said at least one electric ignition member (A I) are operatively associated with the central burner (1).
  13. Assembly comprising at least a gas burner according to any one of the preceding claims and a cooktop plate (P).
  14. Assembly according to claim 13, wherein the axis of the first pipe (10) is positioned below the plate plane (P1) of the cooktop plate (P), and wherein the axis of the second pipe (5) is positioned above the plate plane (P1) of the cooktop plate (P).
  15. Assembly according to claim 14, wherein the second pipe is enclosed between the cooktop plate (P) on the one hand and the central burner (1) and annular burner (3) on the other hand.
  16. Assembly according to any one of claims 13 to 15, comprising at least one primary air intake located below the plate.
EP15807963.2A 2015-11-30 2015-11-30 Gas burner with multiple rings of flames having two parallel venturis, one above the other Active EP3384208B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2015/053260 WO2017093615A1 (en) 2015-11-30 2015-11-30 Gas burner with multiple rings of flames having two parallel venturis, one above the other

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EP3384208A1 EP3384208A1 (en) 2018-10-10
EP3384208B1 true EP3384208B1 (en) 2020-03-04

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US (1) US10551057B2 (en)
EP (1) EP3384208B1 (en)
ES (1) ES2805468T3 (en)
WO (1) WO2017093615A1 (en)

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
TR201702673A2 (en) * 2017-02-22 2018-09-21 Arcelik As A BOAT GROUP
US11085645B2 (en) * 2018-05-31 2021-08-10 Haier Us Appliance Solutions, Inc. Eductor for a gas cooktop appliance
CN110242958A (en) * 2019-06-12 2019-09-17 佛山市顺德区美的洗涤电器制造有限公司 Burner, burner and the gas cooker of burner
WO2021006829A1 (en) * 2019-07-10 2021-01-14 Femas Metal San. Ve Tic. A.S. Burner assembly for a gas cooking device
TWI716949B (en) * 2019-07-30 2021-01-21 關隆股份有限公司 The burner of the gas stove

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
CH177397A (en) 1934-09-03 1935-05-31 Const D App A Gaz S A Gas heater.
GB8824575D0 (en) * 1988-10-20 1988-11-23 Airoil Flaregas Ltd Improvements in burner assemblies
FR2804496B1 (en) 2000-01-28 2002-07-19 Sourdillon Sa MULTIPLE FLAME CROWN GAS BURNER
EP2053309B1 (en) 2007-10-23 2013-08-07 Electrolux Home Products Corporation N.V. Gas burner

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Title
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US20180347808A1 (en) 2018-12-06
ES2805468T3 (en) 2021-02-12
WO2017093615A1 (en) 2017-06-08
EP3384208A1 (en) 2018-10-10
US10551057B2 (en) 2020-02-04

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