EP2929246A1 - Gas burner comprising a burner heat - Google Patents

Gas burner comprising a burner heat

Info

Publication number
EP2929246A1
EP2929246A1 EP13812013.4A EP13812013A EP2929246A1 EP 2929246 A1 EP2929246 A1 EP 2929246A1 EP 13812013 A EP13812013 A EP 13812013A EP 2929246 A1 EP2929246 A1 EP 2929246A1
Authority
EP
European Patent Office
Prior art keywords
zone
openings
burner
gas burner
mixing chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13812013.4A
Other languages
German (de)
French (fr)
Inventor
Christophe Brouard
Marc Champion
Maarten KALIS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Application des Gaz SA
Original Assignee
Application des Gaz SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Application des Gaz SA filed Critical Application des Gaz SA
Publication of EP2929246A1 publication Critical patent/EP2929246A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/08—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with axial outlets at the burner head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/08—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with axial outlets at the burner head
    • F23D14/085—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with axial outlets at the burner head with injector axis inclined to the burner head axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
    • 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
    • F23D14/28—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/107—Pan supports or grates therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2206/00—Burners for specific applications
    • F23D2206/0015—Gas burners for use in retort furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14062—Special features of gas burners for cooking ranges having multiple flame rings

Definitions

  • Gas burner comprising a burner head
  • the present invention relates to a gas burner for a grill or a cooking vessel and a stove including the gas burner.
  • the burner comprises a mixing chamber and a mixer.
  • a flow of a gas / air mixture is injected into the chamber via the mixer.
  • the burner head forms part of the chamber wall.
  • a plurality of openings in the burner head partition the flow into a plurality of flows.
  • An ignition device provides sufficient energy to initiate combustion of the gas / air mixture outside the chamber at the openings of the burner head. A continuous flow of the gas / air mixture makes it possible to stabilize a flame.
  • the flow velocity must be sufficient so that the flame does not enter the mixing chamber. Indeed, if the speed of the flow is lower than the flammable speed, the fl ame goes up the flow. Combustion must be as complete as possible to limit the formation of incomplete combustion products, especially carbon monoxide.
  • the length of the flame requires the positioning of the cooking vessel at a distance of about 20 mm from the burner head. The distance is necessary to ensure a combustion reaction producing the minimum amount of carbon monoxide. By cons the cooking vessel does not fully recover the heat produced by combustion, a portion of the heat being dissipated in the external environment.
  • the distance of about 20 mm between the burner head and the cooking vessel provides a hold wind.
  • a wind or windshield protection device is often necessary to limit the effect of gusts of wind. Stoves without windshield are inoperative from a wind speed of the order of 3 m / s.
  • the present invention aims to solve all or all of the disadvantages mentioned above.
  • the present invention relates to a gas burner comprising:
  • a mixing chamber a burner head provided with a plurality of openings in fluid communication with the outside, the burner head constituting part of the wall of the mixing chamber,
  • a second zone having a width of between 2 and 20 mm, the second zone surrounding the first zone and comprising apertures having a dimension of between 0.3 and 2 mm, the distance separating the openings being between 0 and 5 and 3.5 mm,
  • the burner head further comprising an annular shoulder.
  • a cooking vessel can be positioned at a minimum distance of about 10 to 15 mm from the burner head without altering the combustion reaction because the presence of the central hole and the intermediate zone allow sufficient oxygenation of the burner. flame.
  • the short distance between the cooking vessel and the burner head limits heat loss.
  • the amount of heat recovered by the cooking vessel is optimized with respect to the amount of gas consumed.
  • the short distance between the cooking vessel and the burner head also ensures that the flame is not blown by the wind.
  • the first and / or second zone comprise openings whose dimensions are between 0.8 and 1.5 mm, the distance separating the openings being between 1.5 and 2.5 mm. . It should be noted that the size of the openings and the distance between the openings may be different between the first zone and the second zone.
  • the first zone has a width of between 3 and 15 mm.
  • the second zone has a width of between 5 and 15 mm.
  • the intermediate zone has a width of between 5 and 15 mm.
  • At least a portion of the openings has an axis oriented at an angle between 0 and 10 ° with respect to an axis of the central hole.
  • At least a portion of the openings of the second zone is disposed on an upper surface of the shoulder.
  • At least a portion of the openings of the second zone is disposed on an inner surface of the shoulder.
  • the annular shoulder of the burner head has a role of protection against the wind vis-à-vis the flames generated by the openings in the first zone.
  • the periphery of the burner head has a peripheral wall forming a ring whose edge is disposed beyond the surface of the shoulder in a direction of extension of the flame.
  • the crown protects the base from flames against the wind. The risk of extinction of the flames by blowing is thus reduced.
  • the ring comprises a radial surface having openings whose size is between 1 and 2.5 mm, the openings being in fluid communication with the outside.
  • the burner comprises a flange surrounding the radial surface of the ring.
  • the distance separating the flange from the radial surface is between 0.5 and 2 mm.
  • the space between the flange and the radial surface is an annular peripheral chamber.
  • the annular peripheral chamber is in fluid communication with the outside by an annular slot.
  • the annular cleft adjoins the edge of the crown.
  • the flange comprises an upper flange.
  • the upper rim defines the outer peripheral end of the slot.
  • the rim is inclined towards the edge of the crown so as to partially close the peripheral chamber.
  • the width of the slot is between 0.7 and 1.3 mm.
  • Part of the flow of the mixture ignites at the slot, generating a peripheral flame.
  • the peripheral flame protects the flames generated at the burner head from the wind.
  • the gas burner has three integral parts:
  • the mixer comprising a tubular pipe having an inlet and an outlet defining a circulation zone of a flow of a gas / air mixture; a Venturi effect structure is included in the circulation zone so as to increase the speed of the flow,
  • the three integral parts (A), (B) and (C) are made of pressed steel sheet, the burner head (C) being also punched; the three parts (A), (B) and (C) being crimped and / or welded.
  • the flange is included in the upper part of the mixer and the mixing chamber (B).
  • the mixer is opening tangentially in the mixing chamber.
  • the mixer opens onto a tangent of the mixing chamber.
  • the flow of the gas / air mixture is distributed homogeneously in the mixing chamber.
  • the openings of the burner head are equitably fed gas / air mixture.
  • the mixer is connected tangentially in the mixing chamber, the tubular pipe of the mixer extending inside the mixing chamber.
  • the tangential connection of the mixer in the mixing chamber maintains the flow of the gas / air mixture at a sufficient speed by limiting the pressure drops at the connection.
  • the extension of the tubular pipe of the mixer inside the mixing chamber guides the flow to obtain a homogeneous distribution of the gas / air mixture in the chamber.
  • a stove comprises at least one gas burner of the type in which a cup having a central opening surrounds the burner head.
  • the cup has a shoulder at the periphery of the burner head and a raised edge with respect to the burner head around the shoulder.
  • the shoulder is hollow in shape and collects projections from the cooking vessel or the outside. This arrangement facilitates the cleaning of the stove.
  • the raised edge around the shoulder is an additional protection against the wind by limiting the risk of blowing.
  • the cup comprises fixing means to the stove allowing alternately to secure and detach.
  • the stove comprises a support for cooking vessel for supporting a cooking vessel, the support having fins surrounding the burner.
  • the fins are:
  • the openings and the convex shape of the fins facing the burner head facilitate the evacuation of the fumes produced by the combustion of the gas / air mixture.
  • the concave shape of the outer face of the fins protects the burner head from the wind.
  • Figure 1 is a perspective view of a gas burner.
  • Figure 2 is a perspective view of a lower portion (A) and an upper portion (B) of a mixer and a mixing chamber of the gas burner, according to a first embodiment.
  • Figure 3 is a perspective view of a lower portion (A) and an upper portion (B) of a mixer and a mixing chamber of the gas burner, according to a second embodiment.
  • Figure 4 is a perspective view of a cooking vessel and a gas burner in operation.
  • Figure 5 is a perspective view of a stove comprising the gas burner and a cup.
  • Figure 6 is a perspective view of a stove including the gas burner, the cup and a support for a cooking vessel.
  • Figure 7 is a longitudinal sectional view of the burner.
  • Figure 8 is a detail of the sectional view of the burner.
  • a gas burner 1 comprises a mixer 3 and a mixing chamber 5.
  • the mixer 3 comprises a tubular conduit 7 provided with a circulation zone 9 between an inlet 11 and an outlet 15.
  • a Venturi effect structure 16 is disposed in the circulation zone 9.
  • the mixing chamber 5 has a wall forming a revolving surface about an axis 17.
  • the swept surface of the surface of revolution is at a distance from the axis 17, so that a central hole 18 passes through the mixing chamber 5, as illustrated in FIGS. 1 to 6.
  • the outlet 15 of the tubular duct 7 opens tangentially into the mixing chamber 5, as illustrated in FIG. 2.
  • the tubular pipe 7 penetrates tangentially and extends into the chamber 5 so that the outlet 15 is in fluid communication with the interior of the chamber 5.
  • the burner 1 comprises a lower part (A) and an upper part (B) of pressed steel sheet or aluminum.
  • a burner head 19 constitutes a portion (C) of the wall of the mixing chamber 5, as illustrated in FIG.
  • the burner head 19 has a shoulder 21. As illustrated in Figure 1; the shoulder 21 is annular and located at the periphery of the mixing chamber 5 so as to define an advance of the burner head 19 in the direction of extension of the flame.
  • the burner head 19 has a plurality of openings 22 in fluid communication with the outside.
  • a first zone 23 of the burner head 19 surrounds the central hole 18 and comprises openings 22 whose size is between 0.8 and 1.5 mm. The distance separating the openings of the first zone is between 1, 5 and 2.5 mm.
  • the first zone 23 is an annular surface partly comprised in a plane perpendicular to the axis 17 or inclined at an angle of less than 10 ° so as to advance the periphery of the zone 23 in the direction of extension. of flame.
  • a zone width is defined as the difference in length between a maximum radius and a minimum radius of the zone, with respect to the axis 17.
  • the width of the first zone D1 is between 3 and 15 mm.
  • a second zone 25 surrounds the first zone 23 and comprises openings 22 whose size is between 0.8 and 1.5 mm.
  • the distance separating the openings of the second zone is between 1, 5 and 2.5 mm.
  • the width of the second zone D2 is between 5 and 15 mm.
  • the second zone 25 comprises an annular inner surface 27 about the axis 17.
  • the inner surface 27 is inclined at an angle of 30 to 60 ° with respect to a plane perpendicular to the axis 17 of in order to advance the periphery of the inner surface 27 in the flame extension direction.
  • the inner surface 27 constitutes the edge of the annular shoulder 21.
  • the first zone 25 comprises an annular upper surface 29 surrounding the inner surface 27.
  • the upper surface 29 is inclined at an angle of 0 to 10 ° with respect to a plane perpendicular to the axis 17 ask to advance the periphery of the upper surface 29 in the direction of flame extension.
  • An intermediate zone 31 is located between the first zone 23 and the second zone 25.
  • the intermediate zone 31 is an annular surface in a plane perpendicular to the axis or inclined at an angle of less than 10 ° so as to present advancing the periphery of the intermediate zone 31 in the direction of flame extension.
  • the surface of the intermediate zone is full, by full one hears no opening.
  • the width of the intermediate zone Di is between 5 and 15 mm.
  • the perimeter of the head 19 has a circumferential wall forming a ring whose edge 32 is disposed beyond the surface of the shoulder 21 in the direction of extension of the flame, as shown in FIG. 1.
  • Figure 8 shows a detail 52 of Figure 7.
  • the ring has a radial surface 53.
  • the upper part of the mixer and of the mixing chamber (B) comprises a flange 55 surrounding the radial surface 53.
  • the distance separating the flange 55 from the surface radial 53 is 1, 5 mm.
  • a peripheral chamber 57 is located between the flange 55 and the radial surface 53.
  • An annular slot 59 abuts the edge 32 of the ring.
  • the flange 55 has an upper flange 61.
  • the rim 61 is inclined at the edge 32 of the crown so as to partially close the peripheral chamber 57.
  • the width of the slot is 0.9 mm.
  • the radial surface 53 has round apertures 63 with a diameter of 1.5 mm, in fluid communication with the mixing chamber 5 and the peripheral chamber 57.
  • the burner is included in a stove 33, so that the burner head 19 is in fluid communication with the outside.
  • a cup 35 having a central opening surrounds the burner head, as illustrated in FIGS. 5 and 6.
  • the cup 35 has a shoulder 37 so that the shoulder 37 forms a groove 39 set back from the head of the burner. burner 19.
  • the groove 39 is oriented in the opposite direction to the flame extension direction, as illustrated in FIG. 5.
  • the groove 39 is surrounded by a raised edge 41 with respect to the burner head 19 in the direction of extension of the flame
  • a support for cooking vessel 43 comprises means for fixing to the stove 33.
  • the support 43 is positioned on the stove 33 so as to surround the burner head.
  • the support 43 extends in the extension direction of the flame so as to advance with respect to the burner head 19.
  • the support 43 is intended to hold a cooking vessel 45 at a minimum distance of 10 mm. of the burner head.
  • the support 43 comprises fins 47 of convex shape facing the burner head and concave on the opposite face.
  • the support has openings 48 between the fins.
  • the fins 47 provide the connection between a lower ring 49 and an upper ring 5 1, the lower ring 49 and the upper ring 51 being included in the support 43.
  • the cooking vessel 45 is intended to rest on the upper ring 51 and the lower ring 49 is integral with the stove.
  • the gas burner 1 according to the present invention generates flames of reduced length, allowing a distance of the order of 10 to 15 mm minimum between the cooking vessel 45 the burner head 19.
  • the flow of a gas turbine is fed to the inlet 1 of the mixer 3.
  • the flow rate of the gas / air mixture increases as it passes through the Venturi effect structure 16.
  • the flow of the gas mixture has penetrated the mixing chamber tangentially.
  • the flux is then distributed in the chamber 5 forming a vortex.
  • the flow exits the chamber 5 through the openings 22 of the burner head 19 by decomposing into a plurality of flows.
  • the arrangement of the openings 22 of the first zone 23 and the second zone 25 conditions the formation of a plurality of reduced size flames.
  • the combustion reaction at the origin of the flames is initiated by a punctual energy input, such as a spark. Once the reaction has been initiated, the flames stabilize outside the burner 1 at the openings 22. As it shines in FIG. 4, the flames move away from the burner along the axis 17. The speed of the gas / air mixture flows out of the mixing chamber is substantially equal to the flammability speed. Thus the flame is stabilized at the burner head.
  • the secondary air comes from outside and is sucked through the central hole 18.
  • the suction is generated by the circulation of the gas / air mixture leaving the chamber 5.
  • the raised edge 41 of the cup 35 has a role of protection against the wind by limiting the risk of blowing the flame.
  • the fins 47 of the support 43 by their convex shape facing the burner head, facilitate the evacuation of the burnt gases from the combustion through the openings 22.
  • the concave shape of the outer faces of the fins 47 limits the penetration of the wind into the zone delimited by the support 43.
  • the invention is not limited to the sole embodiment of this device, described above as an example, it encompasses all the variants.

Landscapes

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

Abstract

Gas burner (1) comprising a mixing chamber (5); a burner head (19) provided with a plurality of openings (22) in fluidic communication with the outside, the burner head (19) constituting part of the wall of the mixing chamber (5), the burner head (19) comprises: a central hole (18); a first zone (23) comprising openings of a dimension of between 0.8 and 1 mm; a second zone (25) surrounding the first zone (23) and comprising openings of a dimension of between 0.8 and 1.5 mm; a solid annular intermediate zone (31) situated between the first and the second zone (25); the burner head further comprising an annular shoulder (21).

Description

Brûleur à gaz comprenant une tête de brûleur  Gas burner comprising a burner head
La présente invention concerne un brûleur à gaz pour un grill ou un récipient de cuisine et un réchaud comprenant le brûleur à gaz. The present invention relates to a gas burner for a grill or a cooking vessel and a stove including the gas burner.
Selon l'état de la technique, le brûleur comprend une chambre de mélange et un mélangeur. Un flux d'un mélange gaz/air est injecté dans la chambre par l'intermédiaire du mélangeur.  According to the state of the art, the burner comprises a mixing chamber and a mixer. A flow of a gas / air mixture is injected into the chamber via the mixer.
Le flux du mélange gaz/air sort de la chambre au niveau d'une tête de brûleur. La tête du brûleur constitue une partie de la paroi de la chambre. Une pluralité d'ouvertures comprises dans la tête du brûleur partitionne le flux en une pluralité d'écoulements.  The flow of the gas / air mixture exits the chamber at a burner head. The burner head forms part of the chamber wall. A plurality of openings in the burner head partition the flow into a plurality of flows.
Un dispositif d'allumage, apporte l'énergie suffisante pour initier une combustion du mélange gaz/air à l'extérieur de la chambre au niveau des ouvertures de la tête de brûleur. Un flux continu du mélange gaz/air permet de stabiliser une flamme.  An ignition device provides sufficient energy to initiate combustion of the gas / air mixture outside the chamber at the openings of the burner head. A continuous flow of the gas / air mixture makes it possible to stabilize a flame.
La vitesse du flux doit être suffisante pour que la flamme ne pénètre pas dans la chambre de mélange. En effet si la vitesse du flux est inférieure à la vitesse d'inflammabilité, l a fl a m me remonte l e fl ux. La combustion doit être la plus complète possible pour limiter la formation de produits de combustion incomplète, notamment de monoxyde de carbone.  The flow velocity must be sufficient so that the flame does not enter the mixing chamber. Indeed, if the speed of the flow is lower than the flammable speed, the fl ame goes up the flow. Combustion must be as complete as possible to limit the formation of incomplete combustion products, especially carbon monoxide.
Toutefois, la longueur de la flamme impose le positionnement du récipient de cuisson à une distance de l'ordre de 20 mm de la tête du brûleur. La distance est nécessaire pou r assu rer u ne réaction de combustion produisant le minimum de monoxyde de carbone. Par contre le récipient de cuisson ne récupère pas entièrement la chaleur produite par la combustion, une partie de la chaleur étant dissipée dans le milieu extérieur.  However, the length of the flame requires the positioning of the cooking vessel at a distance of about 20 mm from the burner head. The distance is necessary to ensure a combustion reaction producing the minimum amount of carbon monoxide. By cons the cooking vessel does not fully recover the heat produced by combustion, a portion of the heat being dissipated in the external environment.
De plus la distance de l'ordre de 20 mm entre la tête du brûleur et le récipient de cuisson offre une prise au vent.  In addition the distance of about 20 mm between the burner head and the cooking vessel provides a hold wind.
Un dispositif de protection contre le vent ou pare-vent est souvent nécessaire pour limiter l'effet des rafales de vent. Les réchauds sans pare-vent sont inopérants à partir d'une vitesse de vent de l'ordre de 3 m/s.  A wind or windshield protection device is often necessary to limit the effect of gusts of wind. Stoves without windshield are inoperative from a wind speed of the order of 3 m / s.
La présente i nvention vise à résoud re tout ou pa rtie d es inconvénients mentionnés ci-dessus.  The present invention aims to solve all or all of the disadvantages mentioned above.
A cet effet, la présente invention concerne un brûleur à gaz comprenant :  For this purpose, the present invention relates to a gas burner comprising:
- une chambre de mélange, - une tête de brûleur pourvue d'une pluralité d'ouvertures en communication fluidique avec l'extérieur, la tête de brûleur constituant une partie de la paroi de la chambre de mélange, a mixing chamber, a burner head provided with a plurality of openings in fluid communication with the outside, the burner head constituting part of the wall of the mixing chamber,
le brûleu r à gaz étant caractérisé en ce q ue la tête d u brûleur comporte :  the gas burner being characterized in that the burner head comprises:
- un trou central,  - a central hole,
- une première zone d'une largeur comprise entre 2 et 20 m m, comprenant des ouvertures dont la dimension est comprise entre 0,3 et 2 mm, la distance séparant les ouvertures étant comprise entre 0,5 et 3,5 mm,  a first zone with a width of between 2 and 20 μm, comprising openings whose size is between 0.3 and 2 mm, the distance separating the openings being between 0.5 and 3.5 mm,
- une deuxième zone d'une largeur comprise entre 2 et 20 mm, la deuxième zone entourant la première zone et comprenant des ouvertures dont la d imension est comprise entre 0,3 et 2 mm, la distance séparant les ouvertures étant comprise entre 0,5 et 3,5 mm,  a second zone having a width of between 2 and 20 mm, the second zone surrounding the first zone and comprising apertures having a dimension of between 0.3 and 2 mm, the distance separating the openings being between 0 and 5 and 3.5 mm,
- une zone intermédiaire annulaire pleine, située entre la première et la deuxième zone, d'une largeur comprise entre 2 et 20 mm,  a solid annular intermediate zone situated between the first and the second zone, with a width of between 2 and 20 mm,
la tête du brûleur comprenant en outre un épaulement annulaire. the burner head further comprising an annular shoulder.
Les flammes générées au niveau de la tête du brûleur créent un phénomène d'aspiration. Ainsi de l'air secondaire, en provenance de l'extérieur, est mis en mouvement depuis le trou central vers de la tête de brûleur. L'air secondaire participe à la réaction de combustion et limite la production de monoxyde de carbone.  The flames generated at the burner head create a suction phenomenon. Thus secondary air, coming from the outside, is set in motion from the central hole towards the burner head. Secondary air contributes to the combustion reaction and limits the production of carbon monoxide.
La répartition spatiale des ouvertures et la forme de la tête du brûleur génèrent des flammes d'une longueur réduite. Ainsi un récipient de cuisson peut être positionné à une distance minimum de l'ordre de 10 à 15 mm de la tête du brûleur sans altérer la réaction de la combustion car la présence du trou central et de la zone intermédiaire permettent une oxygénation suffisant de la flamme.  The spatial distribution of the openings and the shape of the burner head generate flames of reduced length. Thus a cooking vessel can be positioned at a minimum distance of about 10 to 15 mm from the burner head without altering the combustion reaction because the presence of the central hole and the intermediate zone allow sufficient oxygenation of the burner. flame.
La faible distance entre le récipient de cuisson et la tête du brûleur limite les déperditions de chaleur. Ainsi la quantité de chaleur récupérée par le récipient de cuisson est optimisée par rapport à la quantité de gaz consommée.  The short distance between the cooking vessel and the burner head limits heat loss. Thus the amount of heat recovered by the cooking vessel is optimized with respect to the amount of gas consumed.
La faible distance entre le récipient de cuisson et la tête du brûleur assure également le non soufflage de la flamme par le vent.  The short distance between the cooking vessel and the burner head also ensures that the flame is not blown by the wind.
Selon un aspect de l'invention, la première et/ou la deuxième zone comprennent des ouvertures dont les dimensions sont comprises entre 0,8 et 1 ,5 mm, la distance séparant les ouvertures étant comprise entre 1 ,5 et 2,5 mm. Il est à noter que la taille des ouvertures et la distance séparant les ouvertures peuvent être différentes entre la première zone et la seconde zone. According to one aspect of the invention, the first and / or second zone comprise openings whose dimensions are between 0.8 and 1.5 mm, the distance separating the openings being between 1.5 and 2.5 mm. . It should be noted that the size of the openings and the distance between the openings may be different between the first zone and the second zone.
Selon un aspect de l'invention, la première zone présente une largeur comprise entre 3 et 15 mm.  According to one aspect of the invention, the first zone has a width of between 3 and 15 mm.
Selon un aspect de l'invention, la deuxième zone présente une largeur comprise entre 5 et 15 mm.  According to one aspect of the invention, the second zone has a width of between 5 and 15 mm.
Selon un aspect de l'invention, la zone intermédiaire présente une largeur comprise entre 5 et 15 mm.  According to one aspect of the invention, the intermediate zone has a width of between 5 and 15 mm.
Selon un aspect de l'invention, au moins une partie des ouvertures présente un axe orienté selon un angle compris entre 0 et 10° par rapport à un axe du trou central.  According to one aspect of the invention, at least a portion of the openings has an axis oriented at an angle between 0 and 10 ° with respect to an axis of the central hole.
Selon un aspect de l'invention au moins une partie des ouvertures de la deuxième zone est disposée sur une surface supérieure de l'épaulement.  According to one aspect of the invention at least a portion of the openings of the second zone is disposed on an upper surface of the shoulder.
Selon un aspect de l'invention, au moins une partie des ouvertures de la deuxième zone est disposée sur une surface intérieure de l'épaulement.  According to one aspect of the invention, at least a portion of the openings of the second zone is disposed on an inner surface of the shoulder.
L'épaulement annulaire de la tête du brûleur a un rôle de protection contre le vent vis-à-vis des flammes générées par les ouvertures situées dans la première zone.  The annular shoulder of the burner head has a role of protection against the wind vis-à-vis the flames generated by the openings in the first zone.
Selon un aspect de l'invention, la périphérie de la tête du brûleur présente une paroi périphérique formant une couronne dont le bord est disposé au-delà de la surface de l'épaulement dans une direction d'extension de la flamme.  According to one aspect of the invention, the periphery of the burner head has a peripheral wall forming a ring whose edge is disposed beyond the surface of the shoulder in a direction of extension of the flame.
La couronne protège la base des flammes contre le vent. Le risque d'extinction des flammes par soufflage est ainsi réduit.  The crown protects the base from flames against the wind. The risk of extinction of the flames by blowing is thus reduced.
Selon un aspect de l'invention, la couronne comprend une surface radiale présentant des ouvertures dont la dimension est comprise entre 1 et 2,5 mm, les ouvertures étant en communication fluidique avec l'extérieur.  According to one aspect of the invention, the ring comprises a radial surface having openings whose size is between 1 and 2.5 mm, the openings being in fluid communication with the outside.
Selon un aspect de l'invention, le brûleur comprend une collerette entourant la surface radiale de la couronne. La distance séparant la collerette de la surface radiale est comprise entre 0,5 et 2 mm.  According to one aspect of the invention, the burner comprises a flange surrounding the radial surface of the ring. The distance separating the flange from the radial surface is between 0.5 and 2 mm.
Selon un aspect de l'invention, l'espace situé entre la collerette et la surface radiale est une chambre périphérique annulaire. La chambre périphérique annulaire est en communication fluidique avec l'extérieur par une fente annulaire. La fente annulaire jouxte le bord de la couronne.  According to one aspect of the invention, the space between the flange and the radial surface is an annular peripheral chamber. The annular peripheral chamber is in fluid communication with the outside by an annular slot. The annular cleft adjoins the edge of the crown.
Selon un aspect de l'invention, la collerette comprend un rebord supérieur. Le rebord supérieur définit l'extrémité périphérique extérieure de la fente. Le rebord est incliné en direction du bord de la couronne de manière à refermer partiellement la chambre périphérique. According to one aspect of the invention, the flange comprises an upper flange. The upper rim defines the outer peripheral end of the slot. The rim is inclined towards the edge of the crown so as to partially close the peripheral chamber.
Selon un aspect de l'invention la largeur de la fente est comprise entre 0,7 et 1 ,3 mm.  According to one aspect of the invention the width of the slot is between 0.7 and 1.3 mm.
Une partie du flux du mélange gaz/air sort de la chambre de mélange par les ouvertures de la surface périphérique, transite par la chambre périphérique et rejoint l'extérieur par la fente annulaire.  Part of the flow of the gas / air mixture exits the mixing chamber through the openings of the peripheral surface, passes through the peripheral chamber and joins the outside through the annular slot.
La partie du flux du mélange s'enflamme au niveau de la fente, engendrant une flamme périphérique. La flamme périphérique protège du vent les flammes générées au niveau de la tête du brûleur.  Part of the flow of the mixture ignites at the slot, generating a peripheral flame. The peripheral flame protects the flames generated at the burner head from the wind.
Selon un aspect de l'invention, le brûleur à gaz comporte trois parties solidaires :  According to one aspect of the invention, the gas burner has three integral parts:
- une partie inférieure d'un mélangeur et de la chambre de mélange (A),  a lower part of a mixer and of the mixing chamber (A),
le mélangeur comportant une conduite tubulaire présentant une entrée et une sortie délimitant une zone de circulation d'un flux d'un mélange gaz/air ; une structure à effet Venturi est comprise dans la zone de circulation de manière à augmenter la vitesse du flux,  the mixer comprising a tubular pipe having an inlet and an outlet defining a circulation zone of a flow of a gas / air mixture; a Venturi effect structure is included in the circulation zone so as to increase the speed of the flow,
- une partie supérieure du mélangeur et de la chambre de mélange (B),  an upper part of the mixer and of the mixing chamber (B),
- la tête du brûleur (C).  - the burner head (C).
Selon un aspect de l'invention relevant d'un premier mode de réalisation, les trois parties solidaires (A), (B) et (C) sont en tôle acier emboutie, la tête du brûleur (C) étant également poinçonnée ; les trois parties (A), (B) et (C) étant serties et/ou soudées.  According to one aspect of the invention pertaining to a first embodiment, the three integral parts (A), (B) and (C) are made of pressed steel sheet, the burner head (C) being also punched; the three parts (A), (B) and (C) being crimped and / or welded.
Selon un aspect de l'invention la collerette est comprise dans la partie supérieure du mélangeur et de la chambre de mélange (B).  According to one aspect of the invention the flange is included in the upper part of the mixer and the mixing chamber (B).
Selon un aspect de l'invention, le mélangeur est débouchant tangentiellement dans la chambre de mélange.  According to one aspect of the invention, the mixer is opening tangentially in the mixing chamber.
Le mélangeur débouche sur une tangente de la chambre de mélange. Le flux du mélange gaz/air se répartit de manière homogène dans la chambre de mélange. Ainsi les ouvertures de la tête du brûleur sont équitablement alimentées en mélange gaz/air.  The mixer opens onto a tangent of the mixing chamber. The flow of the gas / air mixture is distributed homogeneously in the mixing chamber. Thus the openings of the burner head are equitably fed gas / air mixture.
Selon un aspect de l'invention, le mélangeur est raccordé tangentiellement dans la chambre de mélange, la conduite tubulaire du mélangeur se prolongeant à l'intérieur de la chambre de mélange Le raccordement tangentiel du mélangeur dans la chambre de mélange maintient le flux du mélange gaz/air à une vitesse suffisante en limitant les pertes de charges au niveau du raccordement. According to one aspect of the invention, the mixer is connected tangentially in the mixing chamber, the tubular pipe of the mixer extending inside the mixing chamber The tangential connection of the mixer in the mixing chamber maintains the flow of the gas / air mixture at a sufficient speed by limiting the pressure drops at the connection.
Le prolongement de la conduite tubulaire du mélangeur à l'intérieur de la chambre de mélange guide le flux pour obtenir une répartition homogène du mélange gaz/air dans la chambre.  The extension of the tubular pipe of the mixer inside the mixing chamber guides the flow to obtain a homogeneous distribution of the gas / air mixture in the chamber.
Selon un aspect de l'invention, un réchaud comporte au moins un brûleur à gaz du genre dans lequel une coupelle, présentant une ouverture centrale entoure la tête du brûleur. La coupelle comporte un épaulement à la périphérie de la tête du brûleur et un bord relevé par rapport à la tête du brûleur autour de l'épaulement.  According to one aspect of the invention, a stove comprises at least one gas burner of the type in which a cup having a central opening surrounds the burner head. The cup has a shoulder at the periphery of the burner head and a raised edge with respect to the burner head around the shoulder.
L'épaulement est de forme creuse et recueille les projections provenant du récipient de cuisson ou de l'extérieur. Cette disposition facilite le nettoyage du réchaud. Le bord relevé autour de l'épaulement est une protection supplémentaire contre le vent en limitant les risques de soufflage.  The shoulder is hollow in shape and collects projections from the cooking vessel or the outside. This arrangement facilitates the cleaning of the stove. The raised edge around the shoulder is an additional protection against the wind by limiting the risk of blowing.
Selon un aspect de l'invention, la coupelle comporte des moyens de fixation au réchaud permettant alternativement de la solidariser et de la désolidariser.  According to one aspect of the invention, the cup comprises fixing means to the stove allowing alternately to secure and detach.
Le fa it q ue la coupelle soit démontable facilite également de nettoyage du brûleur.  The fact that the cup is removable makes it easier to clean the burner.
Selon un aspect de l'invention le réchaud comporte, un support pour récipient de cuisson destiné à supporter un récipient de cuisson, le support comportant des ailettes entourant le brûleur.  According to one aspect of the invention the stove comprises a support for cooking vessel for supporting a cooking vessel, the support having fins surrounding the burner.
Les ailettes sont :  The fins are:
- de forme convexe face à la tête du brûleur et concave face extérieure,  - Of convex shape facing the burner head and concave outer face,
- séparées par des ouvertures.  - separated by openings.
Les ouvertures et la forme convexe des ailettes face à la tête du brûleur facilitent l'évacuation des fumées produites par la combustion du mélange gaz/air. La forme concave de la face extérieure des ailettes protège la tête du brûleur du vent.  The openings and the convex shape of the fins facing the burner head facilitate the evacuation of the fumes produced by the combustion of the gas / air mixture. The concave shape of the outer face of the fins protects the burner head from the wind.
De toute façon l'invention sera bien comprise à l'aide de la description qui suit en référence aux dessins schématiques annexés représentant, à titre d'exemple non limitatif, une forme d'exécution de ce brûleur à gaz. Figure 1 est une vue en perspective d'un brûleur de gaz. In any case the invention will be better understood with the aid of the description which follows with reference to the attached schematic drawings showing, by way of non-limiting example, an embodiment of this gas burner. Figure 1 is a perspective view of a gas burner.
Figure 2 est une vue en perspective d'une partie inférieure (A) et d'une partie supérieure (B) d'un mélangeur et d'une chambre de mélange du brûleur à gaz, selon un premier mode de réalisation. Figure 2 is a perspective view of a lower portion (A) and an upper portion (B) of a mixer and a mixing chamber of the gas burner, according to a first embodiment.
Figure 3 est une vue en perspective d'une partie inférieure (A) et d'une partie supérieure (B) d'un mélangeur et d'une chambre de mélange du brûleur à gaz, selon un second mode de réalisation. Figure 3 is a perspective view of a lower portion (A) and an upper portion (B) of a mixer and a mixing chamber of the gas burner, according to a second embodiment.
Figure 4 est une vue en perspective d'un récipient de cuisson et d'un brûleur à gaz en fonctionnement. Figure 4 is a perspective view of a cooking vessel and a gas burner in operation.
Figure 5 est une vue en perspective d'un réchaud comprenant le brûleur à gaz et une coupelle. Figure 5 is a perspective view of a stove comprising the gas burner and a cup.
Figure 6 est une vue en perspective d'un réchaud comprenant le brûleur à gaz, la coupelle et un support pour récipient de cuisson. Figure 6 is a perspective view of a stove including the gas burner, the cup and a support for a cooking vessel.
Figure 7 est une vue en coupe longitudinale du brûleur. Figure 8 est un détail de la vue en coupe du brûleur. Figure 7 is a longitudinal sectional view of the burner. Figure 8 is a detail of the sectional view of the burner.
Selon un mode de réal isation , un brû leur à gaz 1 comporte un mélangeur 3 et une chambre de mélange 5. Le mélangeur 3 comporte une conduite tubulaire 7 pourvue d'une zone de circulation 9 entre une entrée 1 1 et une sortie 15. Une structure à effet Venturi 16 est disposée dans la zone de circulation 9. According to one embodiment, a gas burner 1 comprises a mixer 3 and a mixing chamber 5. The mixer 3 comprises a tubular conduit 7 provided with a circulation zone 9 between an inlet 11 and an outlet 15. A Venturi effect structure 16 is disposed in the circulation zone 9.
La chambre de mélange 5 comporte une paroi formant une surface de révol ution autour d 'un axe 17. La su rface balayée de la surface de révolution se trouve à distance de l'axe 17, de telle sorte qu'un trou central 18 traverse la chambre de mélange 5, comme illustré sur les figures 1 à 6.  The mixing chamber 5 has a wall forming a revolving surface about an axis 17. The swept surface of the surface of revolution is at a distance from the axis 17, so that a central hole 18 passes through the mixing chamber 5, as illustrated in FIGS. 1 to 6.
La sortie 1 5 de la conduite tubulaire 7 débouche tangentiellement dans la chambre de mélange 5, comme illustré sur la figure 2.  The outlet 15 of the tubular duct 7 opens tangentially into the mixing chamber 5, as illustrated in FIG. 2.
Selon un deuxième mode de réalisation, illustré sur la figure 3, la conduite tubulaire 7 pénètre tangentiellement et se prolonge dans la chambre de mélange 5 de telle sorte que la sortie 1 5 soit en communication fluidique avec l'intérieur de la chambre 5. According to a second embodiment, illustrated in FIG. 3, the tubular pipe 7 penetrates tangentially and extends into the chamber 5 so that the outlet 15 is in fluid communication with the interior of the chamber 5.
Selon le premier et le deuxième mode de réalisation, le brûleur 1 comprend une partie inférieure (A) et une partie supérieure (B) en tôle acier emboutie ou en aluminium. Une tête de brûleur 19 constitue une partie (C) de la paroi de la chambre de mélange 5, comme illustrée sur la figure 1 .  According to the first and second embodiments, the burner 1 comprises a lower part (A) and an upper part (B) of pressed steel sheet or aluminum. A burner head 19 constitutes a portion (C) of the wall of the mixing chamber 5, as illustrated in FIG.
La tête de brûleur 19 comporte un épaulement 21 . Comme illustré sur la figure 1 ; l'épaulement 21 est annulaire et situé en périphérie de la chambre de mélange 5 de sorte à définir une avancée de la tête du brûleur 19 dans le sens d'extension de la flamme.  The burner head 19 has a shoulder 21. As illustrated in Figure 1; the shoulder 21 is annular and located at the periphery of the mixing chamber 5 so as to define an advance of the burner head 19 in the direction of extension of the flame.
La tête du brûleur 19 comporte une pluralité d'ouvertures 22 en communication fluidique avec l'extérieur.  The burner head 19 has a plurality of openings 22 in fluid communication with the outside.
Une prem ière zone 23 de la tête d u brû leu r 19 entoure le trou central 18 et comprend des ouvertures 22 dont la dimension est comprise entre 0,8 et 1 ,5 mm. La distance séparant les ouvertures de la première zone est comprise entre 1 ,5 et 2,5 mm. La première zone 23 est une surface annulaire en partie comprise dans un plan perpendiculaire à l'axe 17 ou incliné d'un angle de moins de 10° de manière à présenter une avancée de la périphérie de la zone 23 dans la direction d'extension de flamme.  A first zone 23 of the burner head 19 surrounds the central hole 18 and comprises openings 22 whose size is between 0.8 and 1.5 mm. The distance separating the openings of the first zone is between 1, 5 and 2.5 mm. The first zone 23 is an annular surface partly comprised in a plane perpendicular to the axis 17 or inclined at an angle of less than 10 ° so as to advance the periphery of the zone 23 in the direction of extension. of flame.
Une largeur de zone est définie comme la différence de longueur entre un rayon maximal et un rayon minimal de la zone, par rapport à l'axe 17. La largeur de la première zone D1 est comprise entre 3 et 15 mm.  A zone width is defined as the difference in length between a maximum radius and a minimum radius of the zone, with respect to the axis 17. The width of the first zone D1 is between 3 and 15 mm.
Une deuxième zone 25 entoure la première zone 23 et comprend des ouvertures 22 dont la dimension est comprise entre 0,8 et 1 ,5 mm. La distance séparant les ouvertures de la deuxième zone est comprise entre 1 ,5 et 2,5 mm. La largeur de la deuxième zone D2 est comprise entre 5 et 15 mm.  A second zone 25 surrounds the first zone 23 and comprises openings 22 whose size is between 0.8 and 1.5 mm. The distance separating the openings of the second zone is between 1, 5 and 2.5 mm. The width of the second zone D2 is between 5 and 15 mm.
La d eu x iè m e zon e 25 comprend une surface intérieure 27 annulaire autour de l'axe 17. La surface intérieure 27 est inclinée d'un angle de 30 à 60° par rapport à un plan perpend iculaire à l 'axe 17 de manière à présenter une avancée de la périphérie de la surface intérieure 27 dans la direction d'extension de flamme.  The second zone 25 comprises an annular inner surface 27 about the axis 17. The inner surface 27 is inclined at an angle of 30 to 60 ° with respect to a plane perpendicular to the axis 17 of in order to advance the periphery of the inner surface 27 in the flame extension direction.
La su rface intérieure 27 constitue le bord de l'épaulement annulaire 21 .  The inner surface 27 constitutes the edge of the annular shoulder 21.
La d eu xièm e zon e 25 comprend une surface supérieure 29 annulaire entourant la surface intérieure 27. La su rface supérieure 29 est inclinée d'un angle de 0 à 1 0° par rapport à un plan perpendiculaire à l'axe 17 d e m a n ière à présenter une avancée de l a péri phérie de l a su rface supérieure 29 dans la direction d'extension de flamme. The first zone 25 comprises an annular upper surface 29 surrounding the inner surface 27. The upper surface 29 is inclined at an angle of 0 to 10 ° with respect to a plane perpendicular to the axis 17 ask to advance the periphery of the upper surface 29 in the direction of flame extension.
Une zone intermédiaire 31 est située entre la première zone 23 et la deuxième zone 25. La zone intermédiaire 31 est une surface annulaire selon un plan perpend iculaire à l'axe ou incl iné d'un angle de moins de 10° de manière à présenter une avancée de la périphérie de la zone intermédiaire 31 dans la direction d'extension de flamme.  An intermediate zone 31 is located between the first zone 23 and the second zone 25. The intermediate zone 31 is an annular surface in a plane perpendicular to the axis or inclined at an angle of less than 10 ° so as to present advancing the periphery of the intermediate zone 31 in the direction of flame extension.
La surface de la zone intermédiaire est pleine, par pleine on entend dépourvue d'ouverture. La largeur de la zone intermédiaire Di est comprise entre 5 et 15 mm.  The surface of the intermediate zone is full, by full one hears no opening. The width of the intermediate zone Di is between 5 and 15 mm.
La pé ri p h éri e d e l a tête d u b rû l e u r 19 présente une paroi périphérique formant une couronne dont le bord 32 est disposé au-delà de la surface de l'épaulement 21 dans la direction d'extension de la flamme, comme illustré sur la figure 1 .  The perimeter of the head 19 has a circumferential wall forming a ring whose edge 32 is disposed beyond the surface of the shoulder 21 in the direction of extension of the flame, as shown in FIG. 1.
La figure 8 présente un détail 52 de la figure 7.  Figure 8 shows a detail 52 of Figure 7.
Comme illustré à la figure 8, la couronne présente une surface radiale 53. La partie supérieure du mélangeur et de la chambre de mélange (B) comprend une collerette 55 entou rant la surface rad iale 53. La distance séparant la collerette 55 de la surface radiale 53 est de 1 ,5 mm.  As illustrated in FIG. 8, the ring has a radial surface 53. The upper part of the mixer and of the mixing chamber (B) comprises a flange 55 surrounding the radial surface 53. The distance separating the flange 55 from the surface radial 53 is 1, 5 mm.
U ne cham bre périphériq ue an nu laire 57 est située entre la collerette 55 et la surface radiale 53. Une fente annulaire 59 jouxte le bord 32 de la couronne.  A peripheral chamber 57 is located between the flange 55 and the radial surface 53. An annular slot 59 abuts the edge 32 of the ring.
La collerette 55 présente un rebord supérieur 61 . Le rebord 61 est incl iné en d irection d u bord 32 de la couronne de manière à refermer partiellement la chambre périphérique 57. La largeur de la fente est de 0,9 mm.  The flange 55 has an upper flange 61. The rim 61 is inclined at the edge 32 of the crown so as to partially close the peripheral chamber 57. The width of the slot is 0.9 mm.
Comme illustré aux figures 7 et 8, la surface radiale 53 présente des ouvertures 63 rondes de d iamètre 1 ,5 mm mettant en communication fluidique la chambre de mélange 5 et la chambre périphérique 57.  As illustrated in FIGS. 7 and 8, the radial surface 53 has round apertures 63 with a diameter of 1.5 mm, in fluid communication with the mixing chamber 5 and the peripheral chamber 57.
Comme montré sur les figures 5 et 6, le brûleur est compris dans un réchaud 33, de telle sorte que la tête du brûleur 19 soit en communication fluidique avec l'extérieur.  As shown in Figures 5 and 6, the burner is included in a stove 33, so that the burner head 19 is in fluid communication with the outside.
Une coupelle 35, présentant une ouverture centrale entoure la tête du brûleur, comme illustré par les figures 5 et 6. La coupelle 35 présente un épaulement 37 de telle sorte que l'épaulement 37 forme une gorge 39 en retrait par rapport à la tête du brûleur 19. La gorge 39 est orientée dans le sens inverse du sens d'extension de flamme, comme illustré sur la figure 5. La gorge 39 est entourée par un bord relevé 41 par rapport à la tête du brûleur 19 dans le sens d'extension de la flamme A cup 35 having a central opening surrounds the burner head, as illustrated in FIGS. 5 and 6. The cup 35 has a shoulder 37 so that the shoulder 37 forms a groove 39 set back from the head of the burner. burner 19. The groove 39 is oriented in the opposite direction to the flame extension direction, as illustrated in FIG. 5. The groove 39 is surrounded by a raised edge 41 with respect to the burner head 19 in the direction of extension of the flame
Un support pour récipient de cuisson 43 comporte des moyens de fixation au réchaud 33. Le support 43 est positionné sur le réchaud 33 de manière à entourer la tête du brûleur.  A support for cooking vessel 43 comprises means for fixing to the stove 33. The support 43 is positioned on the stove 33 so as to surround the burner head.
Le support 43 s'étend dans le sens d'extension de la flamme de man ière à présenter une avancée par rapport à la tête du brûleur 19. Le support 43 est destiné à maintenir un récipient de cuisson 45 à une distance minimum de 10 mm de la tête du brûleur.  The support 43 extends in the extension direction of the flame so as to advance with respect to the burner head 19. The support 43 is intended to hold a cooking vessel 45 at a minimum distance of 10 mm. of the burner head.
Le support 43 comprend des ailettes 47 de forme convexe face à la tête du brûleur et concave sur la face opposée. Le support présente des ouvertures 48 entre les ailettes. Les ailettes 47 réalisent la liaison entre une couronne inférieure 49 et u n e co u ro n n e s upérieure 5 1 , l a couronne inférieure 49 et la couronne supérieure 51 étant comprises dans le support 43.  The support 43 comprises fins 47 of convex shape facing the burner head and concave on the opposite face. The support has openings 48 between the fins. The fins 47 provide the connection between a lower ring 49 and an upper ring 5 1, the lower ring 49 and the upper ring 51 being included in the support 43.
Le récipient de cuisson 45 est destiné à reposer sur la couronne supérieure 51 et la couronne inférieure 49 est solidaire du réchaud.  The cooking vessel 45 is intended to rest on the upper ring 51 and the lower ring 49 is integral with the stove.
Le brû leu r à gaz 1 selon la présente invention engendre des flammes d'une longueur réduite, autorisant une distance de l'ordre de 10 à 15 mm minimum entre le récipient de cuisson 45 la tête du brûleur 19.  The gas burner 1 according to the present invention generates flames of reduced length, allowing a distance of the order of 10 to 15 mm minimum between the cooking vessel 45 the burner head 19.
U n fl ux d ' u n m él a ng e g az/a i r est i nj ecté à l ' en trée 1 1 du mélangeur 3. La vitesse du flux du mélange gaz/air augmente lors du passage par la structure à effet Venturi 16.  The flow of a gas turbine is fed to the inlet 1 of the mixer 3. The flow rate of the gas / air mixture increases as it passes through the Venturi effect structure 16.
Le fl ux d u mélange gaz/ai r pén ètre la ch am bre de mélange 5 tangentiellement. Le flux se répartit ensuite dans la chambre 5 en formant un tourbillon . Le flux sort de la chambre 5 par les ouvertures 22 de la tête du brûleur 19 en se décomposant en une pluralité d'écoulements.  The flow of the gas mixture has penetrated the mixing chamber tangentially. The flux is then distributed in the chamber 5 forming a vortex. The flow exits the chamber 5 through the openings 22 of the burner head 19 by decomposing into a plurality of flows.
L'agencement des ouvertures 22 de la première zone 23 et de la deuxième zone 25 conditionne la formation d'une pluralité de flammes de taille réduite.  The arrangement of the openings 22 of the first zone 23 and the second zone 25 conditions the formation of a plurality of reduced size flames.
La réaction de combustion à l'origine des flammes est initiée par un apport d'énergie ponctuel, comme une étincelle. Une fois la réaction initiée, les flammes se stabilisent à l'extérieur du brûleur 1 au niveau des ouvertures 22. Comme il lustré par la fig u re 4, les flammes s'éloignent du brûleur selon l'axe 17. La vitesse des écoulements du mélange gaz/air sortant de la chambre de mélange est sensiblement égale à la vitesse d'inflammabilité. Ainsi la flamme se stabilise au niveau de la tête du brûleur. The combustion reaction at the origin of the flames is initiated by a punctual energy input, such as a spark. Once the reaction has been initiated, the flames stabilize outside the burner 1 at the openings 22. As it shines in FIG. 4, the flames move away from the burner along the axis 17. The speed of the gas / air mixture flows out of the mixing chamber is substantially equal to the flammability speed. Thus the flame is stabilized at the burner head.
L'épaulement 21 de la tête du brûleur 19 et le fait que la zone intermédiaire 31 soit dépourvue d'ouverture 22 favorise l'adjonction d'air secondaire au mélange gaz/air en provenance de la chambre 5.  The shoulder 21 of the burner head 19 and the fact that the intermediate zone 31 is devoid of opening 22 promotes the addition of secondary air to the gas / air mixture from the chamber 5.
L'air secondaire provient de l'extérieur et est aspiré à travers le trou central 18. L'aspiration est engendrée par la circulation du mélange gaz/air sortant de la chambre 5.  The secondary air comes from outside and is sucked through the central hole 18. The suction is generated by the circulation of the gas / air mixture leaving the chamber 5.
Le bord relevé 41 de la coupelle 35 a un rôle de protection contre le vent en limitant les risques de soufflage de la flamme.  The raised edge 41 of the cup 35 has a role of protection against the wind by limiting the risk of blowing the flame.
Les ailettes 47 du support 43 par leur forme convexe en regard de la tête du brûleur, facilitent l'évacuation des gaz brûlés issus de la combustion par les ouvertures 22.  The fins 47 of the support 43 by their convex shape facing the burner head, facilitate the evacuation of the burnt gases from the combustion through the openings 22.
La forme concave des faces extérieures des ailettes 47 limite la pénétration du vent dans la zone délimitée par le support 43.  The concave shape of the outer faces of the fins 47 limits the penetration of the wind into the zone delimited by the support 43.
Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de ce dispositif, décrite ci-dessus à titre d'exemple, elle en embrasse au contraire toutes les variantes de réalisation.  As goes without saying, the invention is not limited to the sole embodiment of this device, described above as an example, it encompasses all the variants.

Claims

REVENDICATIONS
1 . Brûleur à gaz (1 ) comprenant : 1. Gas burner (1) including:
- une chambre de mélange (5), - a mixing chamber (5),
- une tête de brûleur (19) pourvue d'une pluralité d'ouvertures (22) en communication fluidique avec l'extérieur, la tête de brûleu r (19) constituant une partie de la paroi de la chambre de mélange (5), le brûleu r à gaz (1 ) étant caractérisé en ce q u e la tête du brûleur (19) comporte : - a burner head (19) provided with a plurality of openings (22) in fluid communication with the outside, the burner head r (19) constituting a part of the wall of the mixing chamber (5), the gas burner (1) being characterized in that the head of the burner (19) comprises:
- un trou central (18), - a central hole (18),
- une première zone (23) disposée autour du trou central (18) d'une largeur comprise entre 2 et 20 mm, comprenant des ouvertures dont la dimension est comprise entre 0,3 et 2 mm, la distance séparant les ouvertures étant comprise entre 0,5 et 3,5, - a first zone (23) arranged around the central hole (18) with a width of between 2 and 20 mm, comprising openings whose dimension is between 0.3 and 2 mm, the distance separating the openings being between 0.5 and 3.5,
- une deuxième zone (25) d'une largeur comprise entre 2 et 20 mm, la deuxième zone (25) entourant la première zone (23) et comprenant des ouvertures dont la dimension est comprise entre 0,3 et 2 mm, la distance séparant les ouvertures étant comprise entre 0,5 et 3,5 mm, - a second zone (25) with a width of between 2 and 20 mm, the second zone (25) surrounding the first zone (23) and comprising openings whose dimension is between 0.3 and 2 mm, the distance separating the openings being between 0.5 and 3.5 mm,
- une zone intermédiaire (31 ) annulaire pleine, située entre la première et la deuxième zone (25), d'une largeur comprise entre 2 et 20 mm, la tête du brûleur comprenant en outre un épaulement (21 ) annulaire. - a solid annular intermediate zone (31), located between the first and the second zone (25), with a width of between 2 and 20 mm, the burner head further comprising an annular shoulder (21).
2. Brûleur à gaz (1 ) selon la revendication 1 , dans lequel la première et/ou la deuxième zone comprennent des ouvertures dont les dimensions sont comprises entre 0,8 et 1 ,5 mm, la distance séparant les ouvertures étant comprise entre 1 ,5 et 2,5 mm. 2. Gas burner (1) according to claim 1, in which the first and/or second zone comprise openings whose dimensions are between 0.8 and 1.5 mm, the distance separating the openings being between 1 .5 and 2.5mm.
3. Brûleur à gaz (1 ) selon l'une des revendications précédentes, dans lequel la première zone présente une largeur comprise entre 3 et 15 mm. 3. Gas burner (1) according to one of the preceding claims, wherein the first zone has a width of between 3 and 15 mm.
4. Brûleur à gaz (1 ) selon l'une des revendications précédentes, dans lequel la deuxième zone présente une largeur comprise entre 5 et 15 mm. 4. Gas burner (1) according to one of the preceding claims, wherein the second zone has a width of between 5 and 15 mm.
5. Brûleur à gaz (1 ) selon l'une des revendications précédentes, dans lequel la zone intermédiaire présente une largeur comprise entre 5 et 15 mm. 5. Gas burner (1) according to one of the preceding claims, wherein the intermediate zone has a width of between 5 and 15 mm.
6. Brû l eu r à gaz (1 ) selon l'une des revend ications précédentes, dans lequel au moins une partie des ouvertures de la deuxième zone (25) est disposée sur une surface supérieure (29) de l'épaulement (21 ). 6. Gas burner (1) according to one of the preceding claims, in which at least part of the openings of the second zone (25) is arranged on an upper surface (29) of the shoulder (21 ).
Brûleur à gaz (1 ) selon l 'une des revendications précédentes, dans lequel au moins une partie des ouvertures de la deuxième zone est disposée sur une surface intérieure (27) de l'épaulement (21 ). Gas burner (1) according to one of the preceding claims, in which at least part of the openings of the second zone is arranged on an interior surface (27) of the shoulder (21).
Brûleur à gaz (1 ) selon l'une des revendications précédentes, dans lequel la périphérie de la tête d u brû leu r (19) présente une paroi périphérique formant une couronne dont le bord est disposé au-delà de la surface de l'épaulement (21 ) dans une direction d'extension de la flamme. Gas burner (1) according to one of the preceding claims, in which the periphery of the burner head (19) has a peripheral wall forming a crown whose edge is disposed beyond the surface of the shoulder (21) in a direction of extension of the flame.
Brûleur à gaz (1 ) selon la revend ication 8, dans lequel la couronne comprend une surface radiale (53) présentant des ouvertures (63) dont la dimension est comprise entre 1 et 2,5 mm, les ouvertures (63) étant en communication fluidique avec l'extérieur. Gas burner (1) according to claim 8, in which the crown comprises a radial surface (53) having openings (63) whose dimension is between 1 and 2.5 mm, the openings (63) being in communication fluidic with the outside.
10. Brûleur à gaz (1 ) selon la revendication 9 comprenant une collerette (55) entourant la surface radiale (53) de la couronne, 10. Gas burner (1) according to claim 9 comprising a collar (55) surrounding the radial surface (53) of the crown,
la distance séparant la collerette (55) de la surface rad iale (53) étant comprise entre 0,5 et 2 mm. the distance separating the flange (55) from the radial surface (53) being between 0.5 and 2 mm.
1 1 . Brûleur à gaz (1 ) selon la revendication 10, dans lequel l'espace situé entre la col lerette (55) et la surface radiale (53) est u ne chambre périphérique annulaire (57), 1 1 . Gas burner (1) according to claim 10, in which the space located between the collar (55) and the radial surface (53) is an annular peripheral chamber (57),
la chambre périphérique annulaire (57) étant en communication fluidique avec l'extérieur par une fente annulaire (59) , la fente annulaire (59) jouxtant le bord de la couronne. the annular peripheral chamber (57) being in fluid communication with the exterior via an annular slot (59), the annular slot (59) adjoining the edge of the crown.
12. Brûleur à gaz (1 ) selon la revendication 1 1 , dans lequel la collerette (55) comprend un rebord supérieur (61 ), 12. Gas burner (1) according to claim 1 1, in which the collar (55) comprises an upper rim (61),
le rebord supérieur (61 ) définissant l'extrémité périphérique extérieure de la fente (59) et le rebord (61 ) étant incliné en direction du bord de la couronne de manière à refermer partiellement la chambre périphérique (57). the upper rim (61) defining the outer peripheral end of the slot (59) and the rim (61) being inclined towards the edge of the crown so as to partially close the peripheral chamber (57).
13. Brûleur à gaz (1) selon l'une des revendications précédentes, comportant trois parties solidaires : 13. Gas burner (1) according to one of the preceding claims, comprising three integral parts:
- une partie inférieure d'un mélangeur (3) et de la chambre de mélange (A), - a lower part of a mixer (3) and the mixing chamber (A),
le mélangeur (3) comportant une conduite tubulaire (7) présentant une entrée (11) et une sortie(15) délimitant une zone de circulation (9) d'un flux d'un mélange gaz/air ; une structure à effet Venturi (16) est comprise dans la zone de circulation (9) de manière à augmenter la vitesse du flux, the mixer (3) comprising a tubular pipe (7) having an inlet (11) and an outlet (15) delimiting a circulation zone (9) of a flow of a gas/air mixture; a Venturi effect structure (16) is included in the circulation zone (9) so as to increase the speed of the flow,
- une partie supérieure du mélangeur (3) et de la chambre de mélange (B), - an upper part of the mixer (3) and the mixing chamber (B),
- la tête du brûleur (C). - the burner head (C).
14. Brûleur à gaz(1), selon la revendication 13, dans lequel le mélangeur (3) est débouchant tangentiellement dans la chambre de mélange (5). 14. Gas burner (1) according to claim 13, wherein the mixer (3) opens tangentially into the mixing chamber (5).
15. Brûleur à gaz(1), selon la revendication 13, dans lequel le mélangeur (3) est raccordé tangentiellement dans la chambre de mélange (5), la conduite tubulaire (7) du mélangeur (3) se prolongeant à l'intérieur de la chambre de mélange (5) 15. Gas burner (1), according to claim 13, in which the mixer (3) is connected tangentially in the mixing chamber (5), the tubular pipe (7) of the mixer (3) extending inside of the mixing chamber (5)
EP13812013.4A 2012-12-10 2013-12-04 Gas burner comprising a burner heat Withdrawn EP2929246A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1261814A FR2999276B1 (en) 2012-12-10 2012-12-10 GAS BURNER COMPRISING A BURNER HEAD
PCT/FR2013/052945 WO2014091117A1 (en) 2012-12-10 2013-12-04 Gas burner comprising a burner heat

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EP2929246A1 true EP2929246A1 (en) 2015-10-14

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US (1) US20150308677A1 (en)
EP (1) EP2929246A1 (en)
JP (1) JP2016503872A (en)
CN (1) CN104838206A (en)
AU (1) AU2013357097A1 (en)
CA (1) CA2893432A1 (en)
FR (1) FR2999276B1 (en)
WO (1) WO2014091117A1 (en)

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AU2013357097A1 (en) 2015-07-09
JP2016503872A (en) 2016-02-08
FR2999276A1 (en) 2014-06-13
US20150308677A1 (en) 2015-10-29
CA2893432A1 (en) 2014-06-19
WO2014091117A1 (en) 2014-06-19
FR2999276B1 (en) 2014-12-12
CN104838206A (en) 2015-08-12

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