EP2792950A1 - Burner with coupling member - Google Patents

Burner with coupling member Download PDF

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Publication number
EP2792950A1
EP2792950A1 EP14164487.2A EP14164487A EP2792950A1 EP 2792950 A1 EP2792950 A1 EP 2792950A1 EP 14164487 A EP14164487 A EP 14164487A EP 2792950 A1 EP2792950 A1 EP 2792950A1
Authority
EP
European Patent Office
Prior art keywords
connecting member
burner
fan
opening
flame
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.)
Granted
Application number
EP14164487.2A
Other languages
German (de)
French (fr)
Other versions
EP2792950B1 (en
Inventor
David Chapuis
Jérôme Renard
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.)
Guillot Industrie SAS
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Guillot Industrie SAS
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Filing date
Publication date
Priority claimed from FR1353507A external-priority patent/FR3004788A1/en
Application filed by Guillot Industrie SAS filed Critical Guillot Industrie SAS
Priority to PL14164487T priority Critical patent/PL2792950T3/en
Publication of EP2792950A1 publication Critical patent/EP2792950A1/en
Application granted granted Critical
Publication of EP2792950B1 publication Critical patent/EP2792950B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L3/00—Arrangements of valves or dampers before the fire
    • 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
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/82—Preventing flashback or blowback
    • F23D14/825—Preventing flashback or blowback using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L5/00—Blast-producing apparatus before the fire
    • F23L5/02—Arrangements of fans or blowers

Definitions

  • the present invention relates to a burner in particular for the combustion of a gaseous mixture.
  • a total premix gas burner schematically comprises an air / gas mixer, a fan and a flame holder ramp.
  • one of the aims of the invention is to overcome at least one of these disadvantages mentioned above.
  • the invention proposes a burner comprising a fan arranged to suck a gaseous mixture comprising at least one gas and air, a flame-holder ramp provided with a plurality of openings for diffusing the gaseous mixture to the gas.
  • a connection member fluidly connects the fan to the flame-holder ramp, the connection member having an orifice allowing the release of the flame-catching ramp, the orifice being closed by a removable cap.
  • the burner comprising a fan arranged to suck a gas mixture comprising at least one gas and air is a total premix burner.
  • the connecting member has a bent geometry, and the orifice of the connecting member is arranged on this bend.
  • the output axis i of the fan is not superimposed on the axis of the flame-holder ramp which then has clear access and whose removal is facilitated by opening the cover.
  • the removable cap has a general shape of spherical cap. This conformation then participates in the homogenization of the gas mixture.
  • connection member comprises an outlet opening connected to the flame-holder ramp, the output shaft i of the fan and the normal axis ii to the outlet opening respectively belonging to two distinct parallel planes and offset from each other. a distance from one another, so that the gaseous mixture is introduced tangentially into the connecting member.
  • This configuration then promotes the formation of a vortex in the gas mixture. This results in a better homogenization of the distribution of gas and air of the gas mixture than that obtained in a conventional mixer disposed upstream of the fan (in the direction of circulation of the gas mixture).
  • the ignition is then more reliable, the flames generated from the gas mixture are more stable and the emission of pollutants such as carbon monoxide and nitrogen oxides is limited.
  • the connecting member comprises a channel on which the fan connects at a junction plane, the channel opening out along the output axis i of the fan, into the internal volume of the connecting member. by an internal opening.
  • the channel is extended by a wall surrounding the inner opening, the wall connecting to the interior volume in a sharp stop. This further promotes the formation of a vortex in the gas mixture and helps improve the overall operation of the burner.
  • the junction plane and the plane of the outlet opening of the connecting member are oriented so that their intersection has an angle ⁇ of between 30 ° and 90 ° and preferably an angle ⁇ of about 60 °.
  • This configuration makes it possible to obtain a compromise between the aeraulic pressure drop generated by the presence of the connection member and the vortex effect homogenizing the gaseous mixture. Beyond this angle, in fact, the homogenization is improved at the cost of a loss of aeraulic load, below this angle, the opposite occurs.
  • connection member comprises a junction plane at which the fluid connection with the fan is formed and the connection member comprises an outlet opening connected to the flame-holder ramp, the junction plane and the plane of the outlet opening being configured so that their intersection has an angle ⁇ of between 30 ° and 90 ° and preferably an angle of about 60 °.
  • the angle formed between the seat and the plane of the outlet opening or the horizontal plane advantageously allows the non-return valve to rest on the seat by simple gravity.
  • This angle different from the angle ⁇ between the junction plane and the plane of the exit opening, can be obtained easily by the presence of the channel giving space to provide a seat having a different inclination from that of the junction plan.
  • the non-return valve is removable.
  • the connecting member comprises sealing means for sealing at least between the connecting member and the focus, and between the connecting member and the fan.
  • connection member comprises at least one of the devices chosen from a support for ignition electrodes, a flame finder, a support for ionization electrode, and a device for measuring the pressure in the focus.
  • the outer surface of the connecting member is then used to have secondary functions of the burner, which are then easily accessible.
  • the integration of these secondary functions directly on a casting is more economical than providing these functions on many other ancillary parts.
  • the burner portion 100 illustrated in FIG. figure 1 includes a fan 1 and a flame holder ramp 2 in a fireplace (not shown), fluidically connected to the fan 1 by a connection member 4.
  • the fan 1 draws a mixture of a gas and air from a mixer (not shown) to propel it to the flame-holder ramp 2 for combustion .
  • the connecting member 4 has a bend 5 in which is formed an orifice closed by a removable cover 6. More specifically, the angle ⁇ of the bend 5 is between 30 ° and 90 ° and preferably the angle ⁇ is d about 60 °.
  • This arrangement makes it possible to remove the flame holder ramp 2 through the orifice after removal of the removable cover 6 ( figure 3 ). It is thus possible to clean the flame holder ramp 2 and access the fireplace for maintenance without the need to disassemble the fan 1, the mixer and the gas valve supplying the mixer upstream.
  • the connecting member 4 illustrated in FIG. figure 2 comprises an outlet opening 8, connected to the flame holder ramp 2 for the transfer of the mixture of gas and air to the fireplace.
  • the connection member 4 also comprises a channel 10 connected to the fan 1 at a junction plane 18 as visible on the figure 6 .
  • the channel 10 is extended by a wall 17 surrounding an internal opening 7, the latter giving access to the internal volume 22 of the connecting member 4.
  • connection member 4 also comprises sealing means, such as seal grooves 21, for example for an O-ring, at the interface between the connection member 4 and the hearth as well as at the interface between the connecting member 4 and the fan 1 ( Figures 2 and 3 ).
  • the figure 4 illustrates the internal volume 22 of the connecting member 4 in which the axis of the channel 10 is not in the same plane as the normal axis ii at the exit aperture 8.
  • the The axis of the channel 10 and the normal axis ii at the exit aperture 8 belong to distinct parallel planes offset by a distance d.
  • This arrangement makes it possible to create a vortex in the flow of the gaseous mixture by introducing it tangentially. This helps to improve its homogeneity.
  • the wall 17 is connected to the interior volume 22 along a sharp edge 23 which helps to accentuate the vortex movement.
  • the connecting member comprises a seat 19 for a nonreturn valve 11, the seat 19 being oriented, thanks to the presence of the channel 10, so as to have an angle equal to or greater than 90 ° with respect to the horizontal as illustrated at figure 6 .
  • the non-return valve 11 can therefore rest by simple gravity against the seat 19, which would not have been possible if the valve 11 was received in the edge of the joint plane 18.
  • the valve 11 is designed to be movable between two positions, a first rest position where the valve rests against the seat 19 so as to seal the inner opening 7 and a second position in which the valve 11 releases the inner opening 7 as illustrated on the figure 6 .
  • the presence of this non-return valve 11 makes it possible to prevent the fumes coming from the combustion of the gaseous mixture from rising too much towards the fan 1.
  • the available outer surface of the connecting member 4 may be used to arrange devices secondary to the operation of the burner 100, such as an ignition electrode holder 12, a flame finder 13, a support for an ionisation electrode 14 and a member for measuring the pressure of the hearth, as shown in FIG. figure 5 .
  • an ignition transformer 16 is arranged on the removable cover 6.
  • a given ratio of gas and air is first received in a mixer, for example of the venturi type, to form the gaseous combustion mixture.
  • the latter is sucked by the fan 1 which propels it towards the connection member 4.
  • the junction plane 18 and the plane of the outlet opening 8 for the gaseous mixture are oriented at an angle of about 60 °, and the openings 7, 8 being also offset by a distance d, a vortex path of the gas mixture is generated.
  • the gaseous mixture is very well homogenized at the inlet of the flame holder ramp 2. Its ignition is then more reliable and the generated flames are more stable, which contributes to a good operation of the burner 100.
  • this homogeneity of the gaseous mixture makes it possible to reduce the emission of polluting fumes in the hearth.
  • the general shape of the spherical cap of the removable cover 6 contributes to the homogenization of the gas mixture while minimizing the pressure drop.
  • the present invention provides a decisive improvement to the state of the prior art by providing a connecting member 4 equipped with a removable cover 6, disposed between the fan 1 and the flame holder ramp 2 of the burner 100.
  • a connecting member 4 equipped with a removable cover 6, disposed between the fan 1 and the flame holder ramp 2 of the burner 100.
  • This allows easier access to the flame holder ramp 2 and the fireplace for maintenance. Since it is no longer necessary to dismantle the elements upstream of the flame holder ramp 2 and their sealed connections, the maintenance is faster and secures the operation of the burner 100.
  • the latter is also improved by the obtaining a more homogeneous combustion gas mixture at the outlet of the connecting member 4.

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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

Le brûleur (100) comprend un ventilateur (1) agencé pour aspirer un mélange gazeux comprenant au moins un gaz et de l'air, une rampe accroche-flamme (2) pourvue d'une pluralité d'ouvertures pour diffuser le mélange gazeux à l'intérieur d'un foyer, un organe de raccordement (4) raccordant fluidiquement le ventilateur (1) à la rampe accroche-flamme (2), l'organe de raccordement (4) présentant un orifice permettant le dégagement de la rampe accroche-flamme (2), l'orifice étant obturé par un capot amovible (6).The burner (100) comprises a fan (1) arranged to suck a gaseous mixture comprising at least one gas and air, a flame-holder ramp (2) provided with a plurality of openings for diffusing the gas mixture to the interior of a furnace, a connecting member (4) fluidly connecting the fan (1) to the flame holder ramp (2), the connecting member (4) having an orifice allowing the release of the ramp hangs -flame (2), the orifice being closed by a removable cover (6).

Description

La présente invention concerne un brûleur notamment destiné à la combustion d'un mélange gazeux.The present invention relates to a burner in particular for the combustion of a gaseous mixture.

De façon conventionnelle, un brûleur à gaz à prémélange total comprend schématiquement un mélangeur air/gaz, un ventilateur et une rampe accroche-flamme.Conventionally, a total premix gas burner schematically comprises an air / gas mixer, a fan and a flame holder ramp.

Lors d'opérations de maintenance des brûleurs et de l'échangeur de chaleur, il est nécessaire d'accéder à la rampe accroche-flamme et au foyer en vue de son nettoyage.During maintenance operations of the burners and the heat exchanger, it is necessary to access the flame holder and the fireplace for cleaning.

Or, dans les brûleurs connus, l'accès à la rampe accroche-flamme nécessite de démonter des éléments en amont de cette dernière, tels que le ventilateur, la vanne de gaz, le mélangeur, etc...Il est alors nécessaire de reformer des connections étanches au gaz et au prémélange entre les éléments lors du remontage après nettoyage.However, in the known burners, access to the flame-holder ramp requires disassembly of elements upstream of the latter, such as the fan, the gas valve, the mixer, etc. It is then necessary to reform gastight connections and premixing between the elements during reassembly after cleaning.

Ceci est d'autant plus délicat et difficile à mettre en pratique que le montage est parfois hyperstatique et comprend des pièces fixes les unes par rapport aux autres. De plus, les chaudières puissantes utilisent des pièces lourdes et encombrantes à manipuler ce qui rend encore plus complexe le remontage après entretien.This is all the more difficult and difficult to put into practice that the assembly is sometimes hyperstatic and includes fixed parts relative to each other. In addition, powerful boilers use heavy and cumbersome parts to handle which makes even more complex reassembly after maintenance.

Dans ce contexte technique, un des buts de l'invention réside à pallier l'un au moins de ces inconvénients précités.In this technical context, one of the aims of the invention is to overcome at least one of these disadvantages mentioned above.

A cet effet, l'invention propose un brûleur comprenant un ventilateur agencé pour aspirer un mélange gazeux comprenant au moins un gaz et de l'air, une rampe accroche-flamme pourvue d'une pluralité d'ouvertures pour diffuser le mélange gazeux à l'intérieur d'un foyer, un organe de raccordement raccordant fluidiquement le ventilateur à la rampe accroche-flamme, l'organe de raccordement présentant un orifice permettant le dégagement de la rampe accroche-flamme, l'orifice étant obturé par un capot amovible.For this purpose, the invention proposes a burner comprising a fan arranged to suck a gaseous mixture comprising at least one gas and air, a flame-holder ramp provided with a plurality of openings for diffusing the gaseous mixture to the gas. In the interior of a fireplace, a connection member fluidly connects the fan to the flame-holder ramp, the connection member having an orifice allowing the release of the flame-catching ramp, the orifice being closed by a removable cap.

Ainsi, selon l'invention, il est alors possible de retirer le capot pour avoir accès à la rampe accroche-flamme, dégager la rampe accroche-flamme du brûleur et accéder au foyer de la chaudière pour son nettoyage sans avoir besoin de démonter le ventilateur et autres pièces gênant l'accès à la rampe accroche-flamme. L'entretien est ainsi grandement facilité et il est possible de s'affranchir du contrôle d'étanchéité des connections, notamment entre l'alimentation en gaz et le ventilateur, car ces éléments du brûleur n'ont plus à être démontés. Ceci sécurise l'utilisation du brûleur, et diminue la durée de l'intervention.Thus, according to the invention, it is then possible to remove the hood to have access to the flame-holder ramp, clear the burner flame-catching ramp and access the boiler hearth for cleaning without the need to disassemble the fan and other parts obstructing access to the flame holder ramp. Maintenance is thus greatly facilitated and it is possible to overcome the tightness control connections, especially between the gas supply and the fan, because these burner elements have more to to be dismantled. This secures the use of the burner, and decreases the duration of the intervention.

Il est entendu dans le présent document que le brûleur comprenant un ventilateur agencé pour aspirer un mélange gazeux comprenant au moins un gaz et de l'air est un brûleur à prémélange total.It is understood in this document that the burner comprising a fan arranged to suck a gas mixture comprising at least one gas and air is a total premix burner.

De préférence, l'organe de raccordement présente une géométrie coudée, et l'orifice de l'organe de raccordement est agencé sur ce coude. Dans cette conformation, l'axe de sortie i du ventilateur n'est pas superposé à l'axe de la rampe accroche-flamme qui présente alors un accès dégagé et dont le retrait est facilité par ouverture du capot.Preferably, the connecting member has a bent geometry, and the orifice of the connecting member is arranged on this bend. In this conformation, the output axis i of the fan is not superimposed on the axis of the flame-holder ramp which then has clear access and whose removal is facilitated by opening the cover.

De préférence, le capot amovible présente une forme générale de calotte sphérique. Cette conformation participe alors à l'homogénéisation du mélange gazeux.Preferably, the removable cap has a general shape of spherical cap. This conformation then participates in the homogenization of the gas mixture.

Avantageusement, l'organe de raccordement comprend une ouverture de sortie raccordée à la rampe accroche-flamme, l'axe de sortie i du ventilateur et l'axe normal ii à l'ouverture de sortie appartenant respectivement à deux plans parallèles distincts et décalés d'une distance d l'un par rapport à l'autre, de sorte que le mélange gazeux soit introduit tangentiellement dans l'organe de raccordement.Advantageously, the connection member comprises an outlet opening connected to the flame-holder ramp, the output shaft i of the fan and the normal axis ii to the outlet opening respectively belonging to two distinct parallel planes and offset from each other. a distance from one another, so that the gaseous mixture is introduced tangentially into the connecting member.

Cette configuration favorise alors la formation d'un tourbillon dans le mélange gazeux. Il en résulte une meilleure homogénéisation de la répartition du gaz et de l'air du mélange gazeux que celle obtenue dans un mélangeur traditionnel disposé en amont du ventilateur (dans le sens de circulation du mélange gazeux). L'allumage est alors plus fiable, les flammes générées à partir du mélange gazeux sont plus stables et l'émission de polluants tels que le monoxyde de carbone et les oxydes d'azote est limitée.This configuration then promotes the formation of a vortex in the gas mixture. This results in a better homogenization of the distribution of gas and air of the gas mixture than that obtained in a conventional mixer disposed upstream of the fan (in the direction of circulation of the gas mixture). The ignition is then more reliable, the flames generated from the gas mixture are more stable and the emission of pollutants such as carbon monoxide and nitrogen oxides is limited.

Selon une disposition, l'organe de raccordement comprend un canal sur lequel se raccorde le ventilateur au niveau d'un plan de jonction, le canal débouchant selon l'axe de sortie i du ventilateur, dans le volume intérieur de l'organe de raccordement par une ouverture interne.According to one arrangement, the connecting member comprises a channel on which the fan connects at a junction plane, the channel opening out along the output axis i of the fan, into the internal volume of the connecting member. by an internal opening.

De préférence, le canal est prolongé par une paroi ceinturant l'ouverture interne, la paroi se raccordant sur le volume intérieur selon une arrête vive. Ceci favorise encore davantage la formation d'un tourbillon dans le mélange gazeux et participe à améliorer le fonctionnement global du brûleur.Preferably, the channel is extended by a wall surrounding the inner opening, the wall connecting to the interior volume in a sharp stop. This further promotes the formation of a vortex in the gas mixture and helps improve the overall operation of the burner.

De préférence, le plan de jonction et le plan de l'ouverture de sortie de l'organe de raccordement sont orientés de sorte que leur intersection présente un angle α compris entre 30° et 90° et de préférence un angle α d'environ 60°. Cette configuration permet d'obtenir un compromis entre la perte de charge aéraulique générée par la présence de l'organe de raccordement et l'effet de tourbillon homogénéisant le mélange gazeux. Au-delà de cet angle, en effet, l'homogénéisation est améliorée au prix d'une perte de charge aéraulique, en dessous de cet angle, l'inverse se produit.Preferably, the junction plane and the plane of the outlet opening of the connecting member are oriented so that their intersection has an angle α of between 30 ° and 90 ° and preferably an angle α of about 60 °. This configuration makes it possible to obtain a compromise between the aeraulic pressure drop generated by the presence of the connection member and the vortex effect homogenizing the gaseous mixture. Beyond this angle, in fact, the homogenization is improved at the cost of a loss of aeraulic load, below this angle, the opposite occurs.

Selon une possibilité, l'organe de raccordement comprend un plan de jonction au niveau duquel est formée la liaison fluidique avec le ventilateur et l'organe de raccordement comprend une ouverture de sortie raccordée à la rampe accroche-flamme, le plan de jonction et le plan de l'ouverture de sortie étant configurés de sorte que leur intersection présente un angle α compris entre 30° et 90° et de préférence un angle d'environ 60°.According to one possibility, the connection member comprises a junction plane at which the fluid connection with the fan is formed and the connection member comprises an outlet opening connected to the flame-holder ramp, the junction plane and the plane of the outlet opening being configured so that their intersection has an angle α of between 30 ° and 90 ° and preferably an angle of about 60 °.

Selon une possibilité avantageuse, l'organe de raccordement comprend

  • un siège de clapet anti-retour entourant l'ouverture interne, le siège de clapet anti-retour présentant un angle égal ou supérieur à 90° par rapport à l'horizontale, et
  • un clapet anti-retour mobile entre une première position de repos contre le siège et obturant l'ouverture interne et une seconde position de libération de l'ouverture interne, de sorte à limiter fortement le retour des fumées générées par la combustion du mélange gazeux dans le foyer lorsque le brûleur est à l'arrêt.
According to an advantageous possibility, the connecting member comprises
  • a check valve seat surrounding the inner opening, the check valve seat having an angle equal to or greater than 90 ° to the horizontal, and
  • a non-return valve movable between a first rest position against the seat and closing the internal opening and a second release position of the internal opening, so as to greatly reduce the return of the fumes generated by the combustion of the gas mixture in the fireplace when the burner is stopped.

L'angle formé entre le siège et le plan de l'ouverture de sortie ou le plan horizontal permet avantageusement au clapet anti-retour de reposer sur le siège par simple gravité. Cet angle, différent de l'angle α entre le plan de jonction et le plan de l'ouverture de sortie, peut être obtenu facilement par la présence du canal donnant de l'espace permettant de prévoir un siège présentant une inclinaison différente de celle du plan de jonction.The angle formed between the seat and the plane of the outlet opening or the horizontal plane advantageously allows the non-return valve to rest on the seat by simple gravity. This angle, different from the angle α between the junction plane and the plane of the exit opening, can be obtained easily by the presence of the channel giving space to provide a seat having a different inclination from that of the junction plan.

Avantageusement le clapet anti-retour est amovible.Advantageously, the non-return valve is removable.

Avantageusement, l'organe de raccordement comprend des moyens d'étanchéité permettant d'assurer l'étanchéité au moins entre l'organe de raccordement et le foyer, et entre l'organe de raccordement et le ventilateur. Ainsi, l'entretien du brûleur peut être réalisé sans démonter les connections étanches entre l'organe de raccordement et les autres éléments de la chaudière, par simple retrait du capot amovible. L'étanchéité de ces connections n'est donc pas à contrôler à la fin de l'intervention, contrairement au dispositif de l'art antérieur.Advantageously, the connecting member comprises sealing means for sealing at least between the connecting member and the focus, and between the connecting member and the fan. Thus, the maintenance of the burner can be achieved without removing the sealed connections between the connecting member and the other elements of the boiler, by simply removing the removable cover. The tightness of these connections is not to be controlled at the end of the intervention, unlike the device of the prior art.

Selon une disposition, l'organe de raccordement comprend au moins un des dispositifs choisi parmi un support pour électrodes d'allumage, un viseur de flamme, un support pour électrode d'ionisation, et un organe de mesure de la pression dans le foyer. La surface extérieure de l'organe de raccordement est alors utilisée pour y disposer des fonctions secondaires du brûleur, qui sont alors facilement accessibles. De plus, l'intégration de ces fonctions secondaires directement sur une pièce de fonderie est plus économique que de prévoir ces fonctions sur de nombreuses autres pièces annexes.According to one arrangement, the connection member comprises at least one of the devices chosen from a support for ignition electrodes, a flame finder, a support for ionization electrode, and a device for measuring the pressure in the focus. The outer surface of the connecting member is then used to have secondary functions of the burner, which are then easily accessible. In addition, the integration of these secondary functions directly on a casting is more economical than providing these functions on many other ancillary parts.

D'autres aspects, buts et avantages de la présente invention apparaîtront mieux à la lecture de la description suivante d'un mode de réalisation de celle-ci, donnée à titre d'exemple non limitatif et faite en référence aux dessins annexés. Les figures ne respectent pas nécessairement l'échelle de tous les éléments représentés de sorte à améliorer leur lisibilité. Dans la suite de la description, par souci de simplification, des éléments identiques, similaires ou équivalents des différentes formes de réalisation portent les mêmes références numériques.

  • La figure 1 illustre une vue transversale de l'organe de raccordement selon un mode de réalisation de l'invention.
  • La figure 2 illustre une vue schématique du capot de l'organe de raccordement selon un mode de réalisation de l'invention.
  • La figure 3 illustre une vue schématique de l'organe de raccordement ouvert permettant le dégagement de la rampe accroche-flamme selon un mode de réalisation de l'invention.
  • La figure 4 illustre les axes normaux à une ouverture de sortie et à l'ouverture interne de l'organe de raccordement selon un mode de réalisation de l'invention.
  • La figure 5 illustre un organe de raccordement sur lequel sont prévues des fonctions complémentaires au brûleur selon un mode de réalisation de l'invention.
  • La figure 6 illustre une vue en section d'une région agrandie d'un canal de l'organe de raccordement selon un mode de réalisation de l'invention.
Other aspects, objects and advantages of the present invention will appear better on reading the following description of an embodiment thereof, given by way of nonlimiting example and with reference to the accompanying drawings. The figures do not necessarily respect the scale of all the elements represented so as to improve their readability. In the remainder of the description, for the sake of simplification, identical, similar or equivalent elements of the various embodiments bear the same numerical references.
  • The figure 1 illustrates a transverse view of the connecting member according to one embodiment of the invention.
  • The figure 2 illustrates a schematic view of the cover of the connecting member according to one embodiment of the invention.
  • The figure 3 illustrates a schematic view of the open connection member allowing the release of the flame-holder ramp according to one embodiment of the invention.
  • The figure 4 illustrates the normal axes at an outlet opening and the internal opening of the connecting member according to one embodiment of the invention.
  • The figure 5 illustrates a connecting member on which are provided complementary functions to the burner according to one embodiment of the invention.
  • The figure 6 illustrates a sectional view of an enlarged region of a channel of the connecting member according to one embodiment of the invention.

La portion de brûleur 100 illustrée à la figure 1 comprend un ventilateur 1 et une rampe accroche-flamme 2 dans un foyer (non illustré), raccordée fluidiquement au ventilateur 1 par un organe de raccordement 4. Le ventilateur 1 aspire un mélange d'un gaz et d'air provenant d'un mélangeur (non illustré) pour le propulser vers la rampe accroche-flamme 2 en vue de sa combustion.The burner portion 100 illustrated in FIG. figure 1 includes a fan 1 and a flame holder ramp 2 in a fireplace (not shown), fluidically connected to the fan 1 by a connection member 4. The fan 1 draws a mixture of a gas and air from a mixer (not shown) to propel it to the flame-holder ramp 2 for combustion .

L'organe de raccordement 4 présente un coude 5 dans lequel est ménagé un orifice obturé par un capot amovible 6. Plus précisément, l'angle α du coude 5 est compris entre 30° et 90° et de préférence l'angle α est d'environ 60°.The connecting member 4 has a bend 5 in which is formed an orifice closed by a removable cover 6. More specifically, the angle α of the bend 5 is between 30 ° and 90 ° and preferably the angle α is d about 60 °.

Cette disposition permet de retirer la rampe accroche-flamme 2 à travers l'orifice après retrait du capot amovible 6 (figure 3). Il est ainsi possible d'effectuer le nettoyage de la rampe accroche-flamme 2 et d'accéder au foyer pour son entretien sans avoir besoin de démonter le ventilateur 1, le mélangeur et la vanne de gaz alimentant le mélangeur en amont.This arrangement makes it possible to remove the flame holder ramp 2 through the orifice after removal of the removable cover 6 ( figure 3 ). It is thus possible to clean the flame holder ramp 2 and access the fireplace for maintenance without the need to disassemble the fan 1, the mixer and the gas valve supplying the mixer upstream.

L'organe de raccordement 4 illustré à la figure 2 comprend une ouverture de sortie 8, connectée à la rampe accroche-flamme 2 pour le transfert du mélange de gaz et d'air vers le foyer. L'organe de raccordement 4 comprend également un canal 10 connecté au ventilateur 1 au niveau d'un plan de jonction 18 comme visible sur la figure 6. Le canal 10 est prolongé par une paroi 17 ceinturant une ouverture interne 7, cette dernière donnant accès au volume intérieur 22 de l'organe de raccordement 4.The connecting member 4 illustrated in FIG. figure 2 comprises an outlet opening 8, connected to the flame holder ramp 2 for the transfer of the mixture of gas and air to the fireplace. The connection member 4 also comprises a channel 10 connected to the fan 1 at a junction plane 18 as visible on the figure 6 . The channel 10 is extended by a wall 17 surrounding an internal opening 7, the latter giving access to the internal volume 22 of the connecting member 4.

Comme illustré à la figure 2, un joint d'étanchéité 9 est inséré entre l'organe de raccordement 4 et le capot amovible 6 pour garantir l'étanchéité de l'organe de raccordement 4 au mélange gazeux. L'organe de raccordement 4 comprend également des moyens d'étanchéité, telles que des gorges de joint 21, par exemple pour joint torique, à l'interface entre l'organe de raccordement 4 et le foyer ainsi qu'à l'interface entre l'organe de raccordement 4 et le ventilateur 1 (figures 2 et 3).As illustrated in figure 2 , a seal 9 is inserted between the connecting member 4 and the removable cover 6 to ensure the sealing of the connecting member 4 to the gaseous mixture. The connection member 4 also comprises sealing means, such as seal grooves 21, for example for an O-ring, at the interface between the connection member 4 and the hearth as well as at the interface between the connecting member 4 and the fan 1 ( Figures 2 and 3 ).

La figure 4 illustre le volume intérieur 22 de l'organe de raccordement 4 dans lequel l'axe du canal 10 n'est pas dans le même plan que l'axe normal ii à l'ouverture de sortie 8. Comme cela apparait sur cette figure, l'axe du canal 10 et l'axe normal ii à l'ouverture de sortie 8 appartiennent à des plans parallèles distincts décalés d'une distante d. Cette disposition permet de créer un tourbillon dans l'écoulement du mélange gazeux en l'introduisant de manière tangentielle. Cela contribue à améliorer son homogénéité. De plus, la paroi 17 se raccorde au volume intérieur 22 selon une arête vive 23 qui contribue à accentuer le mouvement de tourbillon.The figure 4 illustrates the internal volume 22 of the connecting member 4 in which the axis of the channel 10 is not in the same plane as the normal axis ii at the exit aperture 8. As appears in this figure, the The axis of the channel 10 and the normal axis ii at the exit aperture 8 belong to distinct parallel planes offset by a distance d. This arrangement makes it possible to create a vortex in the flow of the gaseous mixture by introducing it tangentially. This helps to improve its homogeneity. In addition, the wall 17 is connected to the interior volume 22 along a sharp edge 23 which helps to accentuate the vortex movement.

L'organe de raccordement comprend un siège 19 pour un clapet anti-retour 11, le siège 19 étant orienté, grâce à la présence du canal 10, de sorte à présenter un angle égal ou supérieur à 90° par rapport à l'horizontale comme illustré à la figure 6. Le clapet anti-retour 11 peut donc reposer par simple gravité contre le siège 19, ce qui n'aurait pas été possible si le clapet 11 était accueilli dans le bord du plan de jonction 18. Ainsi le clapet 11 est conçu pour être mobile entre deux positions, une première position de repos où le clapet repose contre le siège 19 de sorte à obturer l'ouverture interne 7 et une seconde position dans laquelle le clapet 11 libère l'ouverture interne 7 telle qu'illustré sur la figure 6. Ainsi, lorsque le brûleur 100 se met à l'arrêt la présence de ce clapet anti-retour 11 permet d'éviter que les fumées provenant de la combustion du mélange gazeux ne remontent trop abondamment vers le ventilateur 1.The connecting member comprises a seat 19 for a nonreturn valve 11, the seat 19 being oriented, thanks to the presence of the channel 10, so as to have an angle equal to or greater than 90 ° with respect to the horizontal as illustrated at figure 6 . The non-return valve 11 can therefore rest by simple gravity against the seat 19, which would not have been possible if the valve 11 was received in the edge of the joint plane 18. Thus the valve 11 is designed to be movable between two positions, a first rest position where the valve rests against the seat 19 so as to seal the inner opening 7 and a second position in which the valve 11 releases the inner opening 7 as illustrated on the figure 6 . Thus, when the burner 100 stops, the presence of this non-return valve 11 makes it possible to prevent the fumes coming from the combustion of the gaseous mixture from rising too much towards the fan 1.

La surface extérieure disponible de l'organe de raccordement 4 peut être utilisée pour agencer des dispositifs secondaires au fonctionnement du brûleur 100, tel qu'un support pour électrode d'allumage 12, un viseur de flamme 13, un support pour électrode d'ionisation 14 et un organe de mesure de la pression 15 du foyer, comme illustré sur la figure 5. De plus, un transformateur d'allumage 16 est disposé sur le capot amovible 6.The available outer surface of the connecting member 4 may be used to arrange devices secondary to the operation of the burner 100, such as an ignition electrode holder 12, a flame finder 13, a support for an ionisation electrode 14 and a member for measuring the pressure of the hearth, as shown in FIG. figure 5 . In addition, an ignition transformer 16 is arranged on the removable cover 6.

Au cours du fonctionnement du brûleur 100, un ratio déterminé de gaz et d'air est tout d'abord reçu dans un mélangeur, par exemple de type venturi, pour former le mélange gazeux de combustion. Ce dernier est aspiré par le ventilateur 1 qui le propulse vers l'organe de raccordement 4. Le plan de jonction 18 et le plan de l'ouverture de sortie 8 pour le mélange gazeux sont orientés selon un angle d'environ 60°, et les ouvertures 7,8 étant également décalées d'une distance d, une trajectoire en tourbillon du mélange gazeux est générée. Ainsi, le mélange gazeux est très bien homogénéisé à l'entrée de la rampe accroche-flamme 2. Son allumage est alors plus fiable et les flammes générées sont plus stables, ce qui contribue à un bon fonctionnement du brûleur 100. De plus, cette homogénéité du mélange gazeux permet de diminuer l'émission de fumées polluantes dans le foyer.During the operation of the burner 100, a given ratio of gas and air is first received in a mixer, for example of the venturi type, to form the gaseous combustion mixture. The latter is sucked by the fan 1 which propels it towards the connection member 4. The junction plane 18 and the plane of the outlet opening 8 for the gaseous mixture are oriented at an angle of about 60 °, and the openings 7, 8 being also offset by a distance d, a vortex path of the gas mixture is generated. Thus, the gaseous mixture is very well homogenized at the inlet of the flame holder ramp 2. Its ignition is then more reliable and the generated flames are more stable, which contributes to a good operation of the burner 100. In addition, this homogeneity of the gaseous mixture makes it possible to reduce the emission of polluting fumes in the hearth.

La forme générale de calotte sphérique du capot amovible 6, participe à l'homogénéisation du mélange gazeux tout en minimisant la perte de charge.The general shape of the spherical cap of the removable cover 6 contributes to the homogenization of the gas mixture while minimizing the pressure drop.

Ainsi, la présente invention apporte une amélioration déterminante à l'état de la technique antérieure en proposant un organe de raccordement 4 doté d'un capot amovible 6, disposé entre le ventilateur 1 et la rampe accroche-flamme 2 du brûleur 100. Ceci permet d'accéder plus facilement à la rampe accroche-flamme 2 et au foyer pour leur entretien. Du fait qu'il n'est plus nécessaire de démonter les éléments en amont de la rampe accroche-flamme 2 et leurs connections étanches, l'entretien est plus rapide et sécurise le fonctionnement du brûleur 100. Ce dernier est par ailleurs amélioré par l'obtention d'un mélange gazeux de combustion plus homogène en sortie de l'organe de raccordement 4.Thus, the present invention provides a decisive improvement to the state of the prior art by providing a connecting member 4 equipped with a removable cover 6, disposed between the fan 1 and the flame holder ramp 2 of the burner 100. This allows easier access to the flame holder ramp 2 and the fireplace for maintenance. Since it is no longer necessary to dismantle the elements upstream of the flame holder ramp 2 and their sealed connections, the maintenance is faster and secures the operation of the burner 100. The latter is also improved by the obtaining a more homogeneous combustion gas mixture at the outlet of the connecting member 4.

Il va de soi que l'invention n'est pas limitée aux modes de réalisation décrits ci-dessus à titre d'exemples mais qu'elle comprend tous les équivalents techniques et les variantes des moyens décrits ainsi que leurs combinaisons.It goes without saying that the invention is not limited to the embodiments described above as examples but that it includes all the technical equivalents and variants of the means described as well as their combinations.

Claims (10)

Brûleur (100) caractérisé en ce qu'il comprend un ventilateur (1) agencé pour aspirer un mélange gazeux comprenant au moins un gaz et de l'air, une rampe accroche-flamme (2) pourvue d'une pluralité d'ouvertures pour diffuser le mélange gazeux à l'intérieur d'un foyer, un organe de raccordement (4) raccordant fluidiquement le ventilateur (1) à la rampe accroche-flamme (2), l'organe de raccordement (4) présentant un orifice permettant le dégagement de la rampe accroche-flamme (2), l'orifice étant obturé par un capot amovible (6).Burner (100) characterized in that it comprises a fan (1) arranged to suck up a gaseous mixture comprising at least one gas and air, a flame-holder ramp (2) provided with a plurality of openings for diffusing the gaseous mixture inside a furnace, a connecting member (4) fluidly connecting the fan (1) to the flame holder ramp (2), the connecting member (4) having an orifice allowing the release of the flame holder ramp (2), the orifice being closed by a removable cover (6). Brûleur (100) selon la revendication 1, caractérisé en ce que l'organe de raccordement (4) présente une géométrie coudée (5), et en ce que l'orifice de l'organe de raccordement (4) est agencé sur ce coude (5).Burner (100) according to claim 1, characterized in that the connecting member (4) has an angled geometry (5), and in that the orifice of the connecting member (4) is arranged on this elbow. (5). Brûleur (100) selon l'une des revendications 1 à 2, caractérisé en ce que le capot amovible (6) présente une forme générale de calotte sphérique.Burner (100) according to one of claims 1 to 2, characterized in that the removable cap (6) has a generally spherical cap shape. Brûleur (100) selon l'une des revendications 1 à 3, caractérisé en ce que l'organe de raccordement (4) comprend une ouverture de sortie (8) raccordée à la rampe accroche-flamme (2), l'axe de sortie (i) du ventilateur (1) et l'axe normal (ii) à l'ouverture de sortie (8) appartenant respectivement à deux plans parallèles distincts et décalés d'une distance d l'un par rapport à l'autre, de sorte que le mélange gazeux soit introduit tangentiellement dans l'organe de raccordement (4).Burner (100) according to one of claims 1 to 3, characterized in that the connecting member (4) comprises an outlet opening (8) connected to the flame holder ramp (2), the output shaft (i) the fan (1) and the normal axis (ii) at the exit opening (8) respectively belonging to two distinct parallel planes and offset by a distance d relative to each other, so that the gaseous mixture is introduced tangentially into the connecting member (4). Brûleur (100) selon l'une des revendications 1 à 4, caractérisé en ce que l'organe de raccordement (4) comprend un canal (10) sur lequel se raccorde le ventilateur (1) au niveau d'un plan de jonction (18), le canal (10) débouchant selon l'axe de sortie (i) du ventilateur (1) dans le volume intérieur (22) de l'organe de raccordement (4) par une ouverture interne (7).Burner (100) according to one of claims 1 to 4, characterized in that the connecting member (4) comprises a channel (10) to which the fan (1) is connected at a junction plane ( 18), the channel (10) opening out along the output axis (i) of the fan (1) into the internal volume (22) of the connecting member (4) through an internal opening (7). Brûleur (100) selon la revendication 5, caractérisé en ce que le canal (10) est prolongé par une paroi (17) ceinturant l'ouverture interne (7), la la paroi (17) se raccordant sur le volume intérieur (22) de l'organe de raccordement (4) selon une arête vive (23).Burner (100) according to claim 5, characterized in that the channel (10) is extended by a wall (17) surrounding the internal opening (7), the wall (17) being connected to the internal volume (22). the connecting member (4) has a sharp edge (23). Brûleur (100) selon l'une des revendications 5 à 6, caractérisé en ce que le plan de jonction (18) et le plan de l'ouverture de sortie (8) de l'organe de raccordement (4) sont orientés de sorte que leur intersection présente un angle α compris entre 30° et 90° et de préférence un angle d'environ 60°.Burner (100) according to one of claims 5 to 6, characterized in that the junction plane (18) and the plane of the outlet opening (8) of the connecting member (4) are oriented so that their intersection has an angle α between 30 ° and 90 ° and preferably an angle of about 60 °. Brûleur (100) selon l'une des revendications 5 à 7, caractérisé en ce que l'organe de raccordement (4) comprend - un siège (19) de clapet anti-retour entourant l'ouverture interne (7), le siège (19) de clapet anti-retour présentant un angle égal ou supérieur à 90° par rapport à l'horizontale (8), et - un clapet anti-retour (11) mobile entre une première position de repos contre le siège (19) et obturant l'ouverture interne (7) et une seconde position de libération de l'ouverture interne (7), de sorte à limiter fortement le retour des fumées générées par la combustion du mélange gazeux dans le foyer lorsque le brûleur (100) est à l'arrêt. Burner (100) according to one of claims 5 to 7, characterized in that the connecting member (4) comprises - a check valve seat (19) surrounding the inner opening (7), the check valve seat (19) having an angle equal to or greater than 90 ° to the horizontal (8), and - a non-return valve (11) movable between a first rest position against the seat (19) and closing the internal opening (7) and a second release position of the inner opening (7), so as to limit strongly the return of the fumes generated by the combustion of the gas mixture in the home when the burner (100) is stopped. Brûleur (100) selon l'une des revendications 1 à 8, caractérisé en ce que l'organe de raccordement (4) comprend des moyens d'étanchéité permettant d'assurer l'étanchéité au moins entre l'organe de raccordement (4) et le foyer, et entre l'organe de raccordement (4) et le ventilateur (1).Burner (100) according to one of claims 1 to 8, characterized in that the connecting member (4) comprises sealing means for sealing at least between the connecting member (4). and the fireplace, and between the connecting member (4) and the fan (1). Brûleur (100) selon l'une des revendications 1 à 9, caractérisé en ce que l'organe de raccordement (4) comprend au moins un des dispositifs choisi parmi un support pour électrodes d'allumage, un viseur de flamme (13), un support pour électrode d'ionisation (14), et un organe de mesure de la pression (15) du foyer.Burner (100) according to one of claims 1 to 9, characterized in that the connecting member (4) comprises at least one of the devices selected from a support for ignition electrodes, a flame finder (13), a support for an ionisation electrode (14), and a device for measuring the pressure (15) of the focus.
EP14164487.2A 2013-04-17 2014-04-11 Burner with coupling member Active EP2792950B1 (en)

Priority Applications (1)

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PL14164487T PL2792950T3 (en) 2013-04-17 2014-04-11 Burner with coupling member

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FR1353507A FR3004788A1 (en) 2013-04-17 2013-04-17 BURNER WITH CONNECTING MEMBER
FR1356190A FR3004789B1 (en) 2013-04-17 2013-06-27 BURNER WITH CONNECTING MEMBER

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EP2792950B1 EP2792950B1 (en) 2019-12-25

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108954314A (en) * 2018-09-03 2018-12-07 广东万家乐厨房科技有限公司 A kind of burner base and gas-cooker convenient for valve body disassembly
IT202200014521A1 (en) * 2022-07-11 2024-01-11 Ferroli Spa COMBUSTION CELL FOR A HEATING SYSTEM

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FR1469007A (en) * 1965-12-08 1967-02-10 Safmat Liquid or gaseous fuel burner
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JPH04363512A (en) * 1991-05-07 1992-12-16 Sanyo Electric Co Ltd Pressure-spray type combustion apparatus
GB2281387A (en) * 1993-08-28 1995-03-01 E O G B Energy Products Limite Burner assembly
US6019593A (en) * 1998-10-28 2000-02-01 Glasstech, Inc. Integrated gas burner assembly
US6059566A (en) * 1997-07-25 2000-05-09 Maxon Corporation Burner apparatus
EP1035376A1 (en) * 1999-03-10 2000-09-13 Wolf GmbH Check valve for use in a gas fired water heater
FR2896574A1 (en) * 2006-01-25 2007-07-27 Cuenod Soc Par Actions Simplif Forced draught burner for boiler, has fan wheel housed in volute of casing which comprises movable casing portion pivotably mounted, around opening axle, with respect to fixed casing portion integrated to end fitting
EP1925882A1 (en) * 2006-11-22 2008-05-28 Enertech AB Burner
EP1936271A1 (en) * 2006-12-11 2008-06-25 Aalborg Industries A/S A burner assembly
US7824178B1 (en) * 2008-02-12 2010-11-02 Lochinvar Corporation Air transfer arm for boiler

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1469007A (en) * 1965-12-08 1967-02-10 Safmat Liquid or gaseous fuel burner
AT328602B (en) * 1973-03-05 1976-03-25 Landwehr & Schultz Gmbh LIGHT OIL BURNER
JPH04363512A (en) * 1991-05-07 1992-12-16 Sanyo Electric Co Ltd Pressure-spray type combustion apparatus
GB2281387A (en) * 1993-08-28 1995-03-01 E O G B Energy Products Limite Burner assembly
US6059566A (en) * 1997-07-25 2000-05-09 Maxon Corporation Burner apparatus
US6019593A (en) * 1998-10-28 2000-02-01 Glasstech, Inc. Integrated gas burner assembly
EP1035376A1 (en) * 1999-03-10 2000-09-13 Wolf GmbH Check valve for use in a gas fired water heater
FR2896574A1 (en) * 2006-01-25 2007-07-27 Cuenod Soc Par Actions Simplif Forced draught burner for boiler, has fan wheel housed in volute of casing which comprises movable casing portion pivotably mounted, around opening axle, with respect to fixed casing portion integrated to end fitting
EP1925882A1 (en) * 2006-11-22 2008-05-28 Enertech AB Burner
EP1936271A1 (en) * 2006-12-11 2008-06-25 Aalborg Industries A/S A burner assembly
US7824178B1 (en) * 2008-02-12 2010-11-02 Lochinvar Corporation Air transfer arm for boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108954314A (en) * 2018-09-03 2018-12-07 广东万家乐厨房科技有限公司 A kind of burner base and gas-cooker convenient for valve body disassembly
IT202200014521A1 (en) * 2022-07-11 2024-01-11 Ferroli Spa COMBUSTION CELL FOR A HEATING SYSTEM

Also Published As

Publication number Publication date
FR3004789B1 (en) 2015-11-13
ES2773133T3 (en) 2020-07-09
PL2792950T3 (en) 2020-05-18
EP2792950B1 (en) 2019-12-25
FR3004789A1 (en) 2014-10-24

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