EP1714075B1 - Gas burner for a cooking applicance - Google Patents

Gas burner for a cooking applicance Download PDF

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Publication number
EP1714075B1
EP1714075B1 EP04704628A EP04704628A EP1714075B1 EP 1714075 B1 EP1714075 B1 EP 1714075B1 EP 04704628 A EP04704628 A EP 04704628A EP 04704628 A EP04704628 A EP 04704628A EP 1714075 B1 EP1714075 B1 EP 1714075B1
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EP
European Patent Office
Prior art keywords
head
central
annular
ducts
flames
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Expired - Fee Related
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EP04704628A
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German (de)
French (fr)
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EP1714075A1 (en
Inventor
Christophe Trochou
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Burner Systems International BSI SA
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Burner Systems International BSI SA
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Publication of EP1714075A1 publication Critical patent/EP1714075A1/en
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    • 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
    • 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

  • Such a burner is known by WO 0202991 A , in which, in addition, the radial channels have at least respective top walls which extend between the central head and the annular head and which solidarize them to one another.
  • the invention therefore essentially aims to meet this demand for reducing the price of gas burners through a structural simplification of the burners due to as small a number as possible of their component parts causing correlatively a substantially reduction of the manufacturing equipment, while ensuring that the improved burners thus obtained in better economic conditions are able to operate at least as efficiently as the current burners, or may be interchangeable with the latter.
  • the invention proposes a gas burner as described in WO 0202991A and according to the preamble of claim 1, and characterized in that said channels have at least respective bottom walls formed on portions projecting upwardly from said pot, this whereby the burner consists essentially of only two pieces, namely said pot and a single piece comprising the central head and the annular head secured by said respective top walls of the channels, which deliver the air-gas mixture in the chamber annular from the central chamber.
  • a gas burner capable of operating under the same conditions, in particular geometrical and energy-efficient, as a current burner, with the advantage of a structural simplification due to the presence of only two constituent parts while a current burner has three or four component parts (not counting the two caps of the central head and the annular head respectively).
  • the arrangements according to the invention can be applied both in burners with two concentric rings of flames (one for the central head and one - or inside or outside - for the annular head) as well as advantageously for burners with three concentric rings of flames (one for the central head and two - respectively inner and outer - for the annular head).
  • the structure of the burner according to the invention makes it possible to produce a burner of very low height, which is particularly suitable, if necessary, for equipping cooking plates; in particular, a greater vertical compactness can be obtained by providing a gas supply nozzle which is horizontal and of radial extent and which is attached to the underside of the pot to come molding with it.
  • the top walls of the channels are integral with respective side walls of the channels.
  • the radial connecting portions between the central head and the annular head have a section of approximate U shape giving them a better mechanical strength.
  • the central chamber of the central head is located substantially higher than the annular chamber of the annular head, the channels are substantially inclined downwards from the central head to the annular head, and that the aforesaid projecting portions of the pot comprise upper inclined planes downwards towards the periphery constituting the aforesaid bottom walls of the channels.
  • the inclination of the bottom walls of the channels is substantially the same as the inclination of the bottom of the central head, whereby the channels extend the Venturi effect to the annular chamber of the annular head.
  • the channels are four in number arranged substantially cross.
  • the gas burner represented therein essentially comprises: two main constituent parts, namely a lower part or burner pot 1 adapted to be fixed (for example by screws) to a plate of a cooking appliance and a piece upper or burner head 2 clean to rest on the pot 1; two caps, namely a discoidal central cap 3 and an annular outer cap 4, adapted to rest on the burner head 2; and various accessory parts such as an electric spark plug 5 and a thermocouple flame presence sensor 6 fixed for example on lateral protuberances 7 of the pot 1.
  • the burner pot 1 may have any desirable overall shape, with a central portion 8 in the form of a bowl at the bottom and in the center of which is provided a blind bore 10 of vertical axis in which is fixed a gas injector 9.
  • a blind bore 10 In the blind bore 10 opens a conduit 11 of substantially radial extent that extends to the vicinity of the edge device 1.
  • the conduit 11 At its free end, has an orifice arranged to receive a connecting piece of a gas supply pipe.
  • the pot 1 may advantageously be a casting, including aluminum alloy, the conduit 11 is pressed against the underside of the pot and comes from foundry with it.
  • the burner head 2 is arranged to rest on the burner pot 1 remaining spaced above it so as to define air passages under conditions which will be explained later.
  • the central head 12 has a bottom 16 at the center of which is an orifice of a central well defined by a sleeve 17 extending vertically and coaxially with the injector 9.
  • the bottom 16 defines, with the bottom wall of the central cap 3 which is vis-à-vis a central chamber 18 forming radial annular Venturi; for this purpose the bottom 16 is annularly inclined radially downwards and towards the outside around the central orifice.
  • An annular circumferential chamber 19 is defined in the annular head 14 by the two aforementioned side walls and the underside of the annular cap 4 and is adapted to distribute the air-gas mixture to the circumferential ring or to the circumferential rings, inside and outside, of flames.
  • a plurality of radial channels 20 extend radially between said central chamber 18 and said annular chamber 19 so that the two chambers 18 and 19 are in fluid communication with each other and that the air-gas mixture delivered in the central chamber 18 flows via the radial channels 20 into the annular chamber 19.
  • the top walls 21 of the channels 20 are integral with the side walls 24 of the channels, so that the central head 12 and the annular head 14 are mechanically secured by U-section spacers which are mechanically much more resistant.
  • the burner consists essentially of only two parts (not counted the caps), namely the burner pot 1 and the burner head 2 made in the form of a one-piece piece comprising the central head 12 and the head annular 14 secured by at least the above said upper walls 21 channels 20 forming connecting struts.
  • the burner head 2 may be a casting, in particular aluminum alloy, requiring only a single mold. Such a part can be produced in large series at a lower cost than that of a set of several parts.
  • the U-section spacers are particularly clearly visible in the bottom perspective view of the burner head 2 illustrated in FIG. figure 2 (On which the reliefs provided on the underside and by which the burner head 2 rests on the pot 1 have not been represented for the sake of simplicity).
  • the central and annular heads 14 and 14 are so arranged that the central chamber 18 is located substantially higher than the annular chamber 19.
  • the channels 20 are substantially inclined towards down from the central head 12 to the annular head 14.
  • the aforesaid projecting portions 23 provided on the pot 1 comprise upper inclined planes downwardly towards the periphery which constitute the aforesaid bottom walls 22 of the
  • the inclination of the bottom walls 22 of the channels is substantially the same as the inclination of the bottom 16 of the central head, as is particularly visible in the figure 3 the channels extend the Venturi effect to the annular chamber 19.
  • the channels 20 are four in number arranged substantially cross as visible at figures 1 and 2 .
  • the arrangements according to the invention lead to a simpler and more economical structure of gas burners with two, or preferably three, crowns of flames.
  • the vertical gap between the pot 1 and the burner head 2 and, on the other hand, to the implementation of portions 23 projecting on the pot 1 which are distributed angularly while remaining distinct from each other there are defined in the burner multiple passages through which the air can circulate freely: thus provides an efficient supply of primary air to the injector 9 located centrally at the same time as can be create upward currents of air for the supply of various crowns of flames in secondary air.

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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 inventive gas burner for a cooking appliance comprises a burner pot (1) carrying a burner head (2) provided with a central head (12) supplied by a central orifice (17) and an annular head (14) supplied by radial channels (20) extending from said central head. The central head, the annular head and the upper baffles (21) of the radial channels are formed in one piece, in particular by casting. The pot (1) is provided with salient sections (23) defining bottom baffles for the radial channels.

Description

La présente invention concerne des perfectionnements apportés dans le domaine des brûleurs à gaz pour appareil culinaire et plus spécifiquement apportés à ceux de ces brûleurs qui présentent au moins deux, et de préférence trois, couronnes de flammes concentriques, de tels brûleurs comprenant :

  • un pot de brûleur agencé pour supporter centralement un injecteur de gaz d'axe sensiblement vertical,
  • une tête de brûleur reposant sur ledit pot en étant écartée au-dessus de celui-ci et comportant
    • une tête centrale avec une couronne centrale de flammes, et
    • une tête annulaire entourant coaxialement ladite tête centrale et présentant au moins une couronne circonférentielle de flammes, et
  • des moyens d'amenée de mélange air-gaz auxdites couronnes centrale et circonférentielle de flammes comprenant
    • un orifice central s'ouvrant dans le fond de la tête centrale coaxialement à l'injecteur, ledit fond étant annulairement incliné radialement vers le bas et vers l'extérieur pour définir, avec un chapeau, une chambre centrale formant venturi annulaire radial,
    • une chambre annulaire dans ladite tête annulaire pour distribuer le mélange air-gaz à ladite au moins une couronne circonférentielle de flammes, et
    • une pluralité de canaux radiaux s'étendant radialement entre ladite chambre centrale et ladite chambre circonférentielle.
The present invention relates to improvements in the field of gas burners for culinary apparatus and more specifically to those of these burners which have at least two, and preferably three, rings of concentric flames, such burners comprising:
  • a burner pot arranged to support centrally a gas injector of substantially vertical axis,
  • a burner head resting on said pot being spread over it and comprising
    • a central head with a central crown of flames, and
    • an annular head coaxially surrounding said central head and having at least one circumferential ring of flames, and
  • means for supplying air-gas mixture to said central and circumferential rings of flames comprising
    • a central opening opening in the bottom of the central head coaxially with the injector, said bottom being annularly inclined radially downwardly and outwardly to define, with a cap, a central chamber forming a radial annular venturi,
    • an annular chamber in said annular head for distributing the air-gas mixture to said at least one circumferential ring of flames, and
    • a plurality of radial channels extending radially between said central chamber and said circumferential chamber.

Un tel brûleur est connu par WO 0202991 A , dans lequel, de plus, les canaux radiaux possèdent au moins des parois de dessus respectives qui s'étendent entre la tête centrale et la tête annulaire et qui solidarisent celles-ci l'une à l'autre.Such a burner is known by WO 0202991 A , in which, in addition, the radial channels have at least respective top walls which extend between the central head and the annular head and which solidarize them to one another.

Des agencements de brûleur à gaz à deux ou trois couronnes concentriques de flammes sont déjà connus dans la technique (par exemple documents GB 2 233 444 , EP 0 552 135 , EP 0 797 048 , EP 0 903 538 ). Tous ces brûleurs sont constitués d'un nombre relativement élevé de pièces constitutives qui nécessitent des matériels appropriés pour leurs fabrications respectives; notamment, s'agissant de pièces de fonderie (par exemple en alliage d'aluminium), il est nécessaire de fabriquer autant de moules différents qu'il y a de pièces constitutives, et ces moules sont très onéreux.Gas burner arrangements with two or three concentric rings of flames are already known in the art (e.g. GB 2,233,444 , EP 0 552 135 , EP 0 797 048 , EP 0 903 538 ). All these burners consist of a relatively large number of component parts which require appropriate materials for their respective fabrications; in particular, in the case of castings (for example aluminum alloy), it is necessary to manufacture as many different molds as there are constituent parts, and these molds are very expensive.

Or il existe, de la part des fabricants d'appareils de cuisson culinaire, une demande constante de réduction des prix des éléments constituant lesdits appareils, et notamment des brûleurs à gaz.However, there is, from the manufacturers of cooking appliances, a constant demand for reducing the prices of the elements constituting said appliances, and in particular gas burners.

L'invention a donc essentiellement pour but de répondre à cette demande de réduction du prix des brûleurs à gaz à travers une simplification structurelle des brûleurs due à un nombre aussi réduit que possible de leurs pièces constitutives entraînant corrélativement une réduction sensiblement des matériels de fabrication, tout en faisant en sorte que les brûleurs perfectionnés ainsi obtenus dans de meilleures conditions économiques soient aptes à fonctionner de façon au moins aussi efficace que les brûleurs actuels, voire puissent être interchangeables avec ces derniers.The invention therefore essentially aims to meet this demand for reducing the price of gas burners through a structural simplification of the burners due to as small a number as possible of their component parts causing correlatively a substantially reduction of the manufacturing equipment, while ensuring that the improved burners thus obtained in better economic conditions are able to operate at least as efficiently as the current burners, or may be interchangeable with the latter.

A ces fins, l'invention propose un brûleur à gaz tel que décrit dans WO 0202991A et selon le préambule de la revendication 1, et qui se caractérise en ce que lesdits canaux possèdent au moins des parois de fond respectives formées sur des portions en saillie vers le haut dudit pot, ce
grâce à quoi le brûleur est constitué essentiellement uniquement de deux pièces, à savoir ledit pot et une pièce unique regroupant la tête centrale et la tête annulaire solidarisées par les susdites parois de dessus respectives des canaux, lesquels délivrent le mélange air-gaz dans la chambre annulaire à partir de la chambre centrale.For these purposes, the invention proposes a gas burner as described in WO 0202991A and according to the preamble of claim 1, and characterized in that said channels have at least respective bottom walls formed on portions projecting upwardly from said pot, this
whereby the burner consists essentially of only two pieces, namely said pot and a single piece comprising the central head and the annular head secured by said respective top walls of the channels, which deliver the air-gas mixture in the chamber annular from the central chamber.

On obtient ainsi un brûleur à gaz capable de fonctionner dans les mêmes conditions, notamment géométriques et énergé-tiques, qu'un brûleur actuel, avec toutefois l'avantage d'une simplification structurelle due à la présence de seulement deux pièces constitutives alors qu'un brûleur actuel compte trois, voire quatre pièces constitutives (non comptés les deux chapeaux de la tête centrale et de la tête annulaire respectivement).Thus, a gas burner capable of operating under the same conditions, in particular geometrical and energy-efficient, as a current burner, with the advantage of a structural simplification due to the presence of only two constituent parts while a current burner has three or four component parts (not counting the two caps of the central head and the annular head respectively).

Ces deux pièces constitutives, qui présentent des formes complexes (surtout la tête de brûleur), peuvent très avantageusement être des pièces de fonderie, notamment en alliage d'aluminium. Seuls deux moules sont alors à prévoir, et il en résulte une économie substantielle sur ce poste de fabrication.These two component parts, which have complex shapes (especially the burner head), can very advantageously be foundry parts, including aluminum alloy. Only two molds are then expected, and this results in a substantial saving on this manufacturing station.

En outre les dispositions conformes à l'invention peuvent trouver application aussi bien dans des brûleurs à deux couronnes concentriques de flammes (une pour la tête centrale et une - soit intérieure, soit extérieure - pour la tête annulaire) qu'avantageusement pour des brûleurs à trois couronnes concentriques de flammes (une pour la tête centrale et deux - respectivement intérieure et extérieure - pour la tête annulaire).Furthermore, the arrangements according to the invention can be applied both in burners with two concentric rings of flames (one for the central head and one - or inside or outside - for the annular head) as well as advantageously for burners with three concentric rings of flames (one for the central head and two - respectively inner and outer - for the annular head).

Enfin, et il s'agit là d'un avantage qui est loin d'être négligeable, la structure du brûleur conforme à l'invention permet de réaliser un brûleur de très faible hauteur, particulièrement approprié éventuellement pour équiper des plaques de cuisson ; notamment, une plus grande compacité verticale peut être obtenue en prévoyant un embout d'alimentation en gaz qui soit horizontal et d'étendue radiale et qui soit accolé à la face de dessous du pot pour venir de moulage avec celui-ci.Finally, and this is an advantage that is far from negligible, the structure of the burner according to the invention makes it possible to produce a burner of very low height, which is particularly suitable, if necessary, for equipping cooking plates; in particular, a greater vertical compactness can be obtained by providing a gas supply nozzle which is horizontal and of radial extent and which is attached to the underside of the pot to come molding with it.

De façon avantageuse, les parois de dessus des canaux sont solidaires de parois latérales respectives des canaux. Ainsi, les parties radiales de liaison entre la tête centrale et la tête annulaire présentent une section en forme approximative de U leur conférant une meilleure résistance mécanique.Advantageously, the top walls of the channels are integral with respective side walls of the channels. Thus, the radial connecting portions between the central head and the annular head have a section of approximate U shape giving them a better mechanical strength.

Dans un mode de réalisation intéressant, on prévoit que la chambre centrale de la tête centrale est située sensiblement plus haut que la chambre annulaire de la tête annulaire, que les canaux sont sensiblement inclinés vers le bas depuis la tête centrale vers la tête annulaire, et que les susdites portions en saillie du pot comportent supérieurement des plans inclinés vers le bas en direction de la périphérie constituant les susdites parois de fond des canaux. Dans ce cas, il est souhaitable que l'inclinaison des parois de fond des canaux soit sensiblement la même que l'inclinaison du fond de la tête centrale, ce grâce à quoi les canaux prolongent l'effet Venturi jusqu'à la chambre annulaire de la tête annulaire.In an advantageous embodiment, it is provided that the central chamber of the central head is located substantially higher than the annular chamber of the annular head, the channels are substantially inclined downwards from the central head to the annular head, and that the aforesaid projecting portions of the pot comprise upper inclined planes downwards towards the periphery constituting the aforesaid bottom walls of the channels. In this case, it is desirable that the inclination of the bottom walls of the channels is substantially the same as the inclination of the bottom of the central head, whereby the channels extend the Venturi effect to the annular chamber of the annular head.

Dans un exemple de réalisation concret, on prévoit que les canaux soient au nombre de quatre disposés sensiblement en croix.In an exemplary embodiment, it is expected that the channels are four in number arranged substantially cross.

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

  • la figure 1 est une vue éclatée, en perspective de trois quarts par le dessus, d'un brûleur à gaz agencé conformément à l'invention ;
  • la figure 2 est une vue en perspective de trois quarts par le dessous de la tête de brûleur de la figure 1 ; et
  • les figures 3 et 4 sont des vues en coupe diamétrale, respectivement selon les lignes III-III et IV-IV, du brûleur de la figure 1.
The invention will be better understood on reading the following detailed description of certain modes of preferred embodiments given solely by way of non-limiting examples). In this description, reference is made to the accompanying drawings in which:
  • the figure 1 is an exploded view, in perspective of three quarters from above, of a gas burner arranged according to the invention;
  • the figure 2 is a perspective view of three quarters from below the burner head of the figure 1 ; and
  • the Figures 3 and 4 are views in diametral section, respectively along the lines III-III and IV-IV, of the burner of the figure 1 .

En se reportant maintenant à l'ensemble des figures 1 à 4, le brûleur à gaz qui y est représenté comprend essentiellement : deux pièces constitutives principales, à savoir une pièce inférieure ou pot de brûleur 1 propre à être fixé (par exemple par des vis) à une plaque d'un appareil de cuisson et une pièce supérieure ou tête de brûleur 2 propre à reposer sur le pot 1 ; deux chapeaux, à savoir un chapeau central 3 de forme discoïdale et un chapeau extérieur 4 de forme annulaire, propres à reposer sur la tête de brûleur 2 ; et diverses pièces accessoires telles qu'une bougie d'allumage électrique 5 et un capteur de présence de flammes à thermocouple 6 fixés par exemple sur des excroissances latérales 7 du pot 1.Referring now to all Figures 1 to 4 , the gas burner represented therein essentially comprises: two main constituent parts, namely a lower part or burner pot 1 adapted to be fixed (for example by screws) to a plate of a cooking appliance and a piece upper or burner head 2 clean to rest on the pot 1; two caps, namely a discoidal central cap 3 and an annular outer cap 4, adapted to rest on the burner head 2; and various accessory parts such as an electric spark plug 5 and a thermocouple flame presence sensor 6 fixed for example on lateral protuberances 7 of the pot 1.

Le pot de brûleur 1 peut présenter toute conformation d'ensemble souhaitable, avec une portion centrale 8 en forme de cuvette au fond et au centre de laquelle est prévu un alésage 10 borgne d'axe vertical dans lequel est fixé un injecteur de gaz 9. Dans l'alésage borgne 10 débouche un conduit 11 d'étendue sensiblement radiale qui s'étend jusqu'au voisinage du bord périphérique du pot 1. A son extrémité libre, le conduit 11 présente un orifice agencé pour recevoir un embout de raccordement d'une tubulure d'alimentation en gaz. Le pot 1 pouvant avantageusement être une pièce de fonderie, notamment en alliage d'aluminium, le conduit 11 est accolé contre la face inférieure du pot et vient de fonderie avec celui-ci.The burner pot 1 may have any desirable overall shape, with a central portion 8 in the form of a bowl at the bottom and in the center of which is provided a blind bore 10 of vertical axis in which is fixed a gas injector 9. In the blind bore 10 opens a conduit 11 of substantially radial extent that extends to the vicinity of the edge device 1. At its free end, the conduit 11 has an orifice arranged to receive a connecting piece of a gas supply pipe. The pot 1 may advantageously be a casting, including aluminum alloy, the conduit 11 is pressed against the underside of the pot and comes from foundry with it.

La tête de brûleur 2 est agencée pour reposer sur le pot de brûleur 1 en restant écartée au-dessus de celui-ci de manière à définir des passages d'air dans des conditions qui seront exposées plus loin.The burner head 2 is arranged to rest on the burner pot 1 remaining spaced above it so as to define air passages under conditions which will be explained later.

La tête de brûleur 2 comporté :

  • une tête centrale 12 présentant une paroi périphérique qui est munie d'encoches 13 et qui supporte supérieurement le susdit chapeau central 3, de sorte que cette tête centrale génère une couronne centrale de flammes ;
  • une tête annulaire 14 entourant coaxialement ladite tête centrale 12 et présentant deux parois latérales respectivement intérieure et extérieure dont l'une au moins (notamment la paroi extérieure) est munie d'encoches 15 et qui supportent supérieurement le susdit chapeau annulaire 4, de sorte que cette tête annulaire génère au moins une couronne circonférentielle (notamment extérieure) de flammes ; dans l'exemple préféré de réalisation illustré sur les figures 1 à 4, la tête annulaire 14 présente des encoches 15 sur ses deux parois latérales de sorte que sont générées deux couronnes circonférentielles - respectivement intérieure et extérieure - de flammes (brûleur à trois couronnes de flammes) ; et
  • des moyens d'amenée de mélange air-gaz aux couronnes centrale et circonférentielle(s) de flammes qui sont agencés comme il suit.
The burner head 2 featured:
  • a central head 12 having a peripheral wall which is provided with notches 13 and which supports above the aforesaid central cap 3, so that this central head generates a central ring of flames;
  • an annular head 14 coaxially surrounding said central head 12 and having two respectively internal and external lateral walls, at least one of which (in particular the outer wall) is provided with notches 15 and which supersedes the aforesaid annular cap 4, so that this annular head generates at least one circumferential ring (especially outer) of flames; in the preferred embodiment illustrated on the Figures 1 to 4 , the annular head 14 has notches 15 on its two side walls so that are generated two circumferential rings - respectively inner and outer - flames (burner with three rings of flames); and
  • means for supplying air-gas mixture to the central and circumferential ring (s) of flames which are arranged as follows.

La tête centrale 12 présente un fond 16 au centre duquel se trouve un orifice d'un puits central défini par un manchon 17 s'étendant verticalement et coaxialement à l'injecteur 9. Le fond 16 définit, avec la paroi de dessous du chapeau central 3 qui est en vis-à-vis, une chambre centrale 18 formant Venturi annulaire radial ; à cet effet le fond 16 est annulairement incliné radialement vers le bas et en direction de l'extérieur autour de l'orifice central.The central head 12 has a bottom 16 at the center of which is an orifice of a central well defined by a sleeve 17 extending vertically and coaxially with the injector 9. The bottom 16 defines, with the bottom wall of the central cap 3 which is vis-à-vis a central chamber 18 forming radial annular Venturi; for this purpose the bottom 16 is annularly inclined radially downwards and towards the outside around the central orifice.

Une chambre circonférentielle annulaire 19 est définie dans la tête annulaire 14 par les deux parois latérales précitées et la face inférieure du chapeau annulaire 4 et est propre à distribuer le mélange air-gaz à la couronne circonférentielle ou aux couronnes circonférentielles, intérieure et extérieure, de flammes.An annular circumferential chamber 19 is defined in the annular head 14 by the two aforementioned side walls and the underside of the annular cap 4 and is adapted to distribute the air-gas mixture to the circumferential ring or to the circumferential rings, inside and outside, of flames.

Enfin une pluralité de canaux 20 radiaux s'étendent radialement entre ladite chambre centrale 18 et ladite chambre annulaire 19 de manière que les deux chambres 18 et 19 soient mises en communication fluidique l'une avec l'autre et que du mélange air-gaz délivré dans la chambre centrale 18 s'écoule, via les canaux radiaux 20, dans la chambre annulaire 19.Finally, a plurality of radial channels 20 extend radially between said central chamber 18 and said annular chamber 19 so that the two chambers 18 and 19 are in fluid communication with each other and that the air-gas mixture delivered in the central chamber 18 flows via the radial channels 20 into the annular chamber 19.

Conformément à l'invention, les canaux 20 sont agencés de la façon suivante :

  • les canaux 20 possèdent au moins des parois de dessus 21 respectives qui s'étendent entre la tête centrale 12 et la tête annulaire 14 et qui solidarisent mécaniquement celles-ci l'une à l'autre, et
  • les canaux 20 possèdent au moins des parois de fond 22 respectives définies par des portions 23 en saillie vers le haut du pot 1.
According to the invention, the channels 20 are arranged as follows:
  • the channels 20 have at least respective top walls 21 which extend between the central head 12 and the annular head 14 and which mechanically join the latter to each other, and
  • the channels 20 have at least respective bottom walls 22 defined by portions 23 projecting upwardly of the pot 1.

Dans un mode de réalisation préféré qui est celui illustré sur les figures 1 à 4, les parois de dessus 21 des canaux 20 sont solidaires des parois latérales 24 des canaux, de sorte que la tête centrale 12 et la tête annulaire 14 sont solidarisées mécaniquement par des entretoises à section en U qui sont mécaniquement beaucoup plus résistantes.In a preferred embodiment which is the one illustrated on the Figures 1 to 4 , the top walls 21 of the channels 20 are integral with the side walls 24 of the channels, so that the central head 12 and the annular head 14 are mechanically secured by U-section spacers which are mechanically much more resistant.

Grâce à cet agencement, le brûleur est constitué essentiellement uniquement de deux pièces (non comptés les chapeaux), à savoir le pot de brûleur 1 et la tête de brûleur 2 réalisée sous forme d'une pièce monobloc regroupant la tête centrale 12 et la tête annulaire 14 solidarisées par au moins les susdites parois de dessus 21 des canaux 20 formant entretoises de liaison. Bien que de forme relativement complexe, la tête de brûleur 2 peut être une pièce de fonderie, notamment en alliage d'aluminium, ne nécessitant qu'un moule unique. Une telle pièce peut être produite en grande série à un coût moindre que celui d'un ensemble de plusieurs pièces.Thanks to this arrangement, the burner consists essentially of only two parts (not counted the caps), namely the burner pot 1 and the burner head 2 made in the form of a one-piece piece comprising the central head 12 and the head annular 14 secured by at least the above said upper walls 21 channels 20 forming connecting struts. Although relatively complex in shape, the burner head 2 may be a casting, in particular aluminum alloy, requiring only a single mold. Such a part can be produced in large series at a lower cost than that of a set of several parts.

Les entretoises à section en U sont particulièrement bien visibles sur la vue en perspective de dessous de la tête de brûleur 2 illustrée à la figure 2 (sur laquelle les reliefs prévus sur la face de dessous et par lesquels la tête de brûleur 2 repose sur le pot 1 n'ont pas été représentés par souci de simplification).The U-section spacers are particularly clearly visible in the bottom perspective view of the burner head 2 illustrated in FIG. figure 2 (On which the reliefs provided on the underside and by which the burner head 2 rests on the pot 1 have not been represented for the sake of simplicity).

Dans l'exemple de réalisation illustré aux figures 1 à 4, les têtes centrale 12 et annulaire 14 sont ainsi agencées que la chambre centrale 18 est située sensiblement plus haut que la chambre annulaire 19. Il en résulte que les canaux 20 sont sensiblement inclinés vers le bas depuis la tête centrale 12 vers la tête annulaire 14. Dans ces conditions, les susdites portions en saillie 23 prévues sur le pot 1 comportent supérieurement des plans inclinés vers le bas en direction de la périphérie qui constituent les susdites parois de fond 22 des canaux 20. Dans ce contexte, il est intéressant que l'inclinaison des parois de fond 22 des canaux (autrement dit l'inclinaison des faces supérieures des portions en saillie 23 du pot 1) soit sensiblement la même que l'inclinaison du fond 16 de la tête centrale, comme cela est particulièrement visible à la figure 3 : ainsi, les canaux prolongent l'effet Venturi jusqu'à la chambre annulaire 19.In the exemplary embodiment illustrated in Figures 1 to 4 , the central and annular heads 14 and 14 are so arranged that the central chamber 18 is located substantially higher than the annular chamber 19. As a result, the channels 20 are substantially inclined towards down from the central head 12 to the annular head 14. Under these conditions, the aforesaid projecting portions 23 provided on the pot 1 comprise upper inclined planes downwardly towards the periphery which constitute the aforesaid bottom walls 22 of the In this context, it is interesting that the inclination of the bottom walls 22 of the channels (ie the inclination of the upper faces of the projecting portions 23 of the pot 1) is substantially the same as the inclination of the bottom 16 of the central head, as is particularly visible in the figure 3 the channels extend the Venturi effect to the annular chamber 19.

Dans un exemple de réalisation simple qui semble devoir donner satisfaction pour les applications courantes de ces brûleurs et quelle que soit la puissance (et donc la taille) des brûleurs, les canaux 20 sont au nombre de quatre disposés sensiblement en croix comme visible aux figures 1 et 2.In a simple embodiment which seems to be satisfactory for the current applications of these burners and regardless of the power (and therefore the size) of the burners, the channels 20 are four in number arranged substantially cross as visible at figures 1 and 2 .

Comme cela ressort clairement de ce qui précède, les dispositions conformes à l'invention conduisent à une structure plus simple et plus économique de brûleurs à gaz à deux, ou avantageusement à trois, couronnes de flammes. En outre, grâce, d'une part, à l'écart vertical entre le pot 1 et la tête de brûleur 2 et, d'autre part, à la mise en oeuvre de portions 23 en saillie sur le pot 1 qui sont réparties angulairement en restant distinctes les unes des autres, on définit au sein du brûleur de multiples passages par lesquels l'air peut circuler librement : on réalise ainsi une alimentation efficace en air primaire en direction de l'injecteur 9 situé centralement en même temps que peuvent se créer des courants d'air ascendant pour l'alimentation des diverses couronnes de flammes en air secondaire.As is clear from the foregoing, the arrangements according to the invention lead to a simpler and more economical structure of gas burners with two, or preferably three, crowns of flames. In addition, thanks, on the one hand, to the vertical gap between the pot 1 and the burner head 2 and, on the other hand, to the implementation of portions 23 projecting on the pot 1 which are distributed angularly while remaining distinct from each other, there are defined in the burner multiple passages through which the air can circulate freely: thus provides an efficient supply of primary air to the injector 9 located centrally at the same time as can be create upward currents of air for the supply of various crowns of flames in secondary air.

Claims (7)

  1. Gas burner for cooking appliances, comprising:
    - a burner dish (1) designed to support centrally a gas injector (9) with a substantially vertical axis
    - a burner head (2) resting on said dish (1) so as to be spaced above same and comprising a central head (12) with a central crown of flames, and an annular head (14) coaxially surrounding said central head (12) and having at least one circumferential crown of flames, and
    - means for drawing a mixture of gas and air to said central and circumferential crowns of flames comprising
    • a central orifice (17) opening into the bottom (16) of the central head (12) coaxially with the injector (9), said bottom (16) being annularly inclined radially towards the base and towards the outside in order to define with a cap (3) a central chamber (18) forming a radial annular venture pipe
    • an annular chamber (19) in said annular head (14) for distributing the mixture of gas and air to said at least one circumferential crown of flames
    • a plurality of radial ducts (20) extending radially between said central chamber (18) and said circumferential chamber (19), and
    • said ducts (20) having at least respective upper walls (21) which extend between the central head (12) and the annular head (14) and which interlock these to one another
    characterised in that said ducts (20) have at least respective base walls (22) formed on parts (23) which project upwards towards the top of said dish (1), whereby the burner is made up essentially solely of two pieces, namely said dish (1) and one single piece (2) which combines the central head (12) and the annular head (14) which are interlocked by the respective aforesaid upper walls (21) of the ducts (20).
  2. Gas burner according to claim 1, characterised in that said upper walls (21) of the ducts (20) are integral with respective lateral walls (23) of the ducts.
  3. Gas burner according to claim 1 or 2 characterised in that the central chamber (18) of the central head (12) is located substantially higher than the annular chamber (19) of the annular head (14), the ducts (20) are substantially inclined towards the base from the central head towards the annular head, and the aforementioned projecting parts (23) of the dish (1) comprise on the top planes inclined towards the base in the direction of the periphery making up the aforesaid base walls (22) of the ducts.
  4. Gas burner according to claim 3 characterised in that the incline of the base walls (22) of the ducts (20) is substantially the same as the incline of the bottom (16) of the central head (12), whereby the ducts extend the venturi effect up to the annular chamber of the annular head.
  5. Gas burner according to any of claims 1 to 4 characterised in that the number of ducts (20) is four arranged substantially as a cross.
  6. Gas burner according to any of claims 1 to 5 characterised in that it comprises two cast pieces (1, 2), more particularly of aluminium alloy.
  7. Gas burner according to any of claims 1 to 6 characterised in that the annular head (14) has two circumferential crowns of flames, namely inner and outer respectively, the burner being of the type having three concentric crowns of flames.
EP04704628A 2004-01-23 2004-01-23 Gas burner for a cooking applicance Expired - Fee Related EP1714075B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2004/000158 WO2005080870A1 (en) 2004-01-23 2004-01-23 Gas burner for a cooking appliance

Publications (2)

Publication Number Publication Date
EP1714075A1 EP1714075A1 (en) 2006-10-25
EP1714075B1 true EP1714075B1 (en) 2012-07-11

Family

ID=34878525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04704628A Expired - Fee Related EP1714075B1 (en) 2004-01-23 2004-01-23 Gas burner for a cooking applicance

Country Status (4)

Country Link
EP (1) EP1714075B1 (en)
ES (1) ES2390764T3 (en)
PL (1) PL206955B1 (en)
WO (1) WO2005080870A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10317088B2 (en) 2015-07-02 2019-06-11 Mabe, S.A. De C.V. Triple ring flame burner

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8689779B2 (en) 2009-01-23 2014-04-08 Bsh Bosch Und Siemens Hausgeraete Gmbh Gas burner
TR200901741A2 (en) * 2009-03-06 2009-08-21 Turaş Gaz Armatürleri̇ Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Multiple gas burner for furnaces.
CN102483232B (en) * 2009-09-04 2015-04-15 Bsh博世和西门子家用电器有限公司 Gas-burner arrangement and gas cooking point

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233444B (en) 1989-08-16 1992-08-26 Lee Cheng San Improvements in and relating to gas cooker hobs
IT1258754B (en) 1992-01-13 1996-02-27 Smeg Spa PERFECTED BURNER FOR THREE-CONCENTRIC GAS COOKING STOVES
ES2107401T3 (en) 1996-03-19 2000-02-01 Sabaf Spa GAS BURNER FOR KITCHEN DEVICES.
EP0903538A1 (en) 1997-09-23 1999-03-24 SABAF S.p.A. Gas burner
IT1318126B1 (en) 2000-07-06 2003-07-23 Sabaf Spa BURNER WITH INTERNAL SEPARATOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10317088B2 (en) 2015-07-02 2019-06-11 Mabe, S.A. De C.V. Triple ring flame burner

Also Published As

Publication number Publication date
ES2390764T3 (en) 2012-11-16
EP1714075A1 (en) 2006-10-25
PL206955B1 (en) 2010-10-29
PL380435A1 (en) 2007-01-22
WO2005080870A1 (en) 2005-09-01

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