WO1989000267A1 - Device forming a gas burner, in particular for heating appliance - Google Patents

Device forming a gas burner, in particular for heating appliance Download PDF

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Publication number
WO1989000267A1
WO1989000267A1 PCT/FR1988/000351 FR8800351W WO8900267A1 WO 1989000267 A1 WO1989000267 A1 WO 1989000267A1 FR 8800351 W FR8800351 W FR 8800351W WO 8900267 A1 WO8900267 A1 WO 8900267A1
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WO
WIPO (PCT)
Prior art keywords
gas
orifices
box
secondary air
diffusion bed
Prior art date
Application number
PCT/FR1988/000351
Other languages
French (fr)
Inventor
Albert Drapier
Gérard GAUTHIER
Original Assignee
Societe Industrielle Auer
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 Societe Industrielle Auer filed Critical Societe Industrielle Auer
Priority to AT88905895T priority Critical patent/ATE80933T1/en
Priority to DE8888905895T priority patent/DE3874871D1/en
Publication of WO1989000267A1 publication Critical patent/WO1989000267A1/en

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Classifications

    • 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
    • F24C3/002—Stoves
    • F24C3/006—Stoves simulating flames

Definitions

  • the present invention relates generally to a device forming a gas burner, in particular for a heating appliance in which the combustion of gas takes place around non-combustible elements having the appearance of logs for example, of the type comprising at least one gas pipe pierced with orifices and placed inside an open box filled with a non-combustible material forming a diffusion bed for the gas before its combustion and on which the logs rest.
  • gas systems mounted in the hearth of the fireplaces to give the appearance of a wood fire by the flames which result from the combustion of the gas around non-combustible logs which imitate natural wood.
  • FR-A-2 420 091 (BERGER) recommends the provision at the base of the fireplace, along the gas rail, of a pipe for diffusing air under pressure.
  • BERGER BERGER
  • GB-A-2 147 994 (COLLIER) provides for its part combination of a gas diffusion ramp or plate at the base of the fireplace with perforated air diffusion tubes; thus creating, within the gas diffusion bed, a primary air supply for combustion.
  • GB-A-1 173 819 consisting in providing for a gas rail embedded in the diffusion bed a device for supplying a mixture of gas and primary air.
  • the subject of the present invention is an improved arrangement of an open fire device of the type considered to be essentially characterized by the combination of a supply by a primary gas-air mixture with at least one supply of secondary air at the upper level of the diffusion bed. . Thanks to this arrangement, it is possible to obtain an almost complete combustion of the gas and to limit as much as possible the formation of soot.
  • the supply of secondary air is located towards the peripheral part and towards the central part of the diffusion bed.
  • the orifices of the gas conduit through which the primary gas-air mixture escapes are located opposite the bottom wall of the box to ensure better diffusion of the mixture through the bed broadcast.
  • the burner device is mounted inside the hearth of a closed hearth chimney, which is advantageously equipped with an air-air heat exchanger to heat the air taken off. in the external environment surrounding the chimney and propel the hot air resulting in this external environment.
  • FIG. 1 is a perspective view with partial tearing away of a burner device according to the invention
  • Figure 2 is a sectional view with partial cutaway along the line II-II of Figure 1
  • Figure 3 is a schematic sectional elevation of a chimney equipped with the device according to one invention.
  • the device 1 forming a gas burner and as shown in FIGS. 1 and 2 comprises a hollow box 2 inside which is mounted at least one duct 3 connected to an external supply device 4 in communication with a gas supply line 5.
  • the box 2 is of rectangular shape and has a bottom wall 8 delimited by four external side walls 9, which each extend, substantially at 90 °, by an external rim 10.
  • the box 2 also has a central part 11 constituted by a flat surface 12, substantially coplanar with the external flanges 10 and connected to the bottom wall 8 by four internal side walls 13.
  • the bottom wall 8, in its part delimited by the internal side walls 13, has an opening 8a.
  • the external 9 and internal side walls 13 of the box 2 define between them and with the bottom wall 8, the internal space 14 of the box 2.
  • the flanges 10 and the surface 12 of the box 2 are pierced with holes 16 for reasons which will be explained later.
  • two conduits 3 are mounted parallel to one another in the interior space 14 of the box 2, and respectively on either side of the central part 11 of the box 2 bordered by the internal side walls 13 .
  • Each conduit 3 is constituted by a tubular cylindrical envelope, with a diameter of the order of 30 mm for example, closed at one end and the other end of which is in communication with a supply device 4.
  • Each duct is provided with orifices 17, which are advantageously located opposite the bottom wall 8 of the box 2.
  • the supply device 4 associated with each duct 3 is in the form of a cylindrical enclosure 20 closed at one end by a wall 21 open at the other end and delimiting an interior chamber 22.
  • the inlet pipe 5 of gas penetrates, sealingly, inside the chamber 22 through the wall 21, and is equipped at its end with a nozzle 23.
  • the enclosure 20 is pierced with orifices 24 to put the chamber 22 in communication with the outside environment.
  • the enclosure 20 has its open end bordered by a flange fixed around an opening 25 provided in the corresponding external side wall 9, so that the chamber 22 and in particular the nozzle 23 are substantially axially aligned with the duct 3 associated.
  • the supply device is supplemented by a mixing device which is constituted in this example by a venturi tube 18 mounted inside the conduit 3, the inlet of the tube 18 coming substantially at the open end of the conduit 3 for form the entrance to it.
  • the tube 18 extends inside the conduit 3 over a length which is of the order of a quarter of the length of the conduit 3.
  • the interior space 14 of the box 2 is filled with a non-combustible material 25, such as vermiculite which is in the form of granules. This non-combustible material is also deposited on the edges 10 of the central part 11 of the box 2.
  • An application of the device 1 forming a burner as described above, is shown diagrammatically in FIG. 3 where the device is mounted inside the hearth of a fireplace 30 with a closed hearth to constitute a heating appliance.
  • a heat exchanger E is mounted inside the enclosure 31 and towards the upper part thereof. The exchanger E communicates, on the one hand, with the outside by the gills 37 and, on the other hand, by openings 39 and by an opening 40 provided in the upper wall 35 of the enclosure 31, with a conduit chimney 41.
  • the device 1 forming a burner is mounted inside the enclosure 31 and rests, for example, on supports 45 provided for this purpose on the lower wall 31, so that air coming from the lower vents 38 can penetrate inside the central part 11 of the box 2.
  • Logs 50 of a non-combustible material are suitably arranged on the non-combustible material 25 which fills the box 2 and which forms a diffusion bed.
  • the pressurized gas from each line 5 leaves the nozzle 23 and enters the chamber 22 of the associated supply device 4.
  • the pressure of the gas drives the air or primary air present in the chamber 22 and coming from the outside through the orifices 24, inside the venturi tube 18 where the primary gas-air mixture takes place.
  • This mixture then propagates inside each conduit 3, is ejected through the orifices 17 of the conduits 3 and diffuses inside the diffusion bed 25.
  • the primary gas-air mixture combines with the air or secondary air injected into the diffusion bed through the orifices 16 provided in the flanges 10 and in the central part 11 of the box 2.
  • the thickness of the non-combustible material 25 located on the flanges 10 and the central part 11 of the box 2 can be adjusted to regulate the supply of secondary air.
  • the quantity of gas admitted into each supply device 4 is itself adjustable by means of a valve not shown.
  • the invention is in no way limited to the embodiment described and includes variant embodiments concerning in particular the shape of the box and the supply device which ensures the primary gas-air mixture.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)
  • Incineration Of Waste (AREA)
  • Spray-Type Burners (AREA)
  • Gas Burners (AREA)

Abstract

The device (1) comprises at least one duct (3) perforated by orifices (17) and placed inside an open box (2) filled with a non-combustible material forming a diffusion bed. A primary gas-air mixture is supplied to the duct (3) by a feed device (4) connected to a gas pipe (5). The device comprises secondary air inlets (16) towards the upper part of the diffusion bed (25), consisting in particular of orifices provided in a rim (10) around the edge of the box (2). The invention is applicable to a closed-hearth fireplace where the gas burns around non-combustible elements which have the appearance of logs of wood.

Description

"Dispositif formant brûleur à gaz, notamment pour appareil de chauffage" "Device forming a gas burner, in particular for a heating appliance"
La présente invention concerne d'une manière générale un dispositif formant brûleur à gaz, notamment pour appareil de chauffage où la combustion du gaz s'effectue autour d'éléments non combustibles ayant l'apparence de bûches par exemple, du type comprenant au moins un conduit de gaz percé d'orifices et placé à l'intérieur d'un caisson ouvert rempli d'un matériau non combustible formant un lit de diffusion pour le gaz avant sa combustion et sur lequel reposent les bûches . On connaît des sytèmes à gaz montés dans l'âtre des cheminées pour donner l'apparence d'un feu de bois par les flammes qui résultent de la combustion du gaz autour de bûches non combustibles qui imitent le bois naturel.The present invention relates generally to a device forming a gas burner, in particular for a heating appliance in which the combustion of gas takes place around non-combustible elements having the appearance of logs for example, of the type comprising at least one gas pipe pierced with orifices and placed inside an open box filled with a non-combustible material forming a diffusion bed for the gas before its combustion and on which the logs rest. There are known gas systems mounted in the hearth of the fireplaces to give the appearance of a wood fire by the flames which result from the combustion of the gas around non-combustible logs which imitate natural wood.
Dans ces systèmes, également appelés parfois "à feu ouvert", le gaz arrive directement par un conduit à l'intérieur du lit de diffusion et, après inflammation, brûle autour des bûches en prenant l'air nécessaire à sa combustion au-dessus du lit de diffusion. La combustion du gaz donne des flammes de couleur jaune en quantité importante. Cette couleur jaune résulte d'une combustion incomplète du gaz, et les produits résiduels de la combustion, notamment l'oxyde de carbone provoque la formation de suie qui se dépose sur les parois de la cheminée et provoque son encrassement.In these systems, also sometimes called "open fire", the gas arrives directly through a conduit inside the diffusion bed and, after ignition, burns around the logs taking the air necessary for its combustion above the diffusion bed. The combustion of the gas gives large quantities of yellow flames. This yellow color results from an incomplete combustion of the gas, and the residual products of combustion, in particular carbon monoxide causes the formation of soot which is deposited on the walls of the chimney and causes its fouling.
On a cherché déjà par divers moyens d'améliorer les conditions de fonctionnement des systèmes à feu ouvert de ce genre.Attempts have already been made by various means to improve the operating conditions of open fire systems of this kind.
Ainsi, FR-A-2 420 091 (BERGER) préconise la disposition à la base du foyer, le long de la rampe à gaz, d'une canalisation de diffusion d'air sous pression. Or, la nécessité de prévoir une alimentation en air sous pression est une complication évidemment indésirable de 1 ' installation .Thus, FR-A-2 420 091 (BERGER) recommends the provision at the base of the fireplace, along the gas rail, of a pipe for diffusing air under pressure. However, the need to provide a pressurized air supply is an obviously undesirable complication of one installation.
GB-A-2 147 994 (COLLIER) prévoit de son côté la combinaison d'une rampe ou plaque de diffusion de gaz à la base du foyer avec des tubes perforés de diffusion d'air ; on crée ainsi, au sein même du lit de diffusion du gaz, une alimentation en air primaire de la combustion. Une proposition plus ancienne se trouve dansGB-A-2 147 994 (COLLIER) provides for its part combination of a gas diffusion ramp or plate at the base of the fireplace with perforated air diffusion tubes; thus creating, within the gas diffusion bed, a primary air supply for combustion. An older proposal can be found in
GB-A-1 173 819 (IRVINE) consistant à prévoir pour une rampe à gaz noyée dans le lit de diffusion un dispositif d'alimentation en mélange de gaz et d'air primaire.GB-A-1 173 819 (IRVINE) consisting in providing for a gas rail embedded in the diffusion bed a device for supplying a mixture of gas and primary air.
La présente invention a pour objet un agencement perfectionné d'un dispositif à feu ouvert du genre considéré essentiellement caractérisé par la combinaison d'une alimentation par un mélange gaz-air primaire avec au moins une alimentation en air secondaire au niveau supérieur du lit de diffusion. Grâce à cette disposition, il est possible d'obtenir une combustion quasi-complète du gaz et de limiter au maximum la formation de suie.The subject of the present invention is an improved arrangement of an open fire device of the type considered to be essentially characterized by the combination of a supply by a primary gas-air mixture with at least one supply of secondary air at the upper level of the diffusion bed. . Thanks to this arrangement, it is possible to obtain an almost complete combustion of the gas and to limit as much as possible the formation of soot.
Selon une autre disposition de l'invention, l'arrivée de l'air secondaire se situe vers la partie périphérique et vers la partie centrale du lit de diffusion.According to another arrangement of the invention, the supply of secondary air is located towards the peripheral part and towards the central part of the diffusion bed.
Selon une autre disposition de l'invention, les orifices du conduit de gaz par lesquels s'échappe le mélange gaz-air primaire, sont situés en- regard de la paroi de fond du caisson pour assurer une meilleure diffusion du mélange à travers le lit de diffusion.According to another arrangement of the invention, the orifices of the gas conduit through which the primary gas-air mixture escapes, are located opposite the bottom wall of the box to ensure better diffusion of the mixture through the bed broadcast.
Selon une application importante de l'invention, le dispositif brûleur est monté à l'intérieur de l'âtre d'une cheminée à foyer fermé, qui est avantageusement équipée d'un échangeur de chaleur air-air pour réchauffer de l'air prélevé dans le milieu extérieur environnant la cheminée et propulser l'air chaud résultant dans ce milieu extérieur.According to an important application of the invention, the burner device is mounted inside the hearth of a closed hearth chimney, which is advantageously equipped with an air-air heat exchanger to heat the air taken off. in the external environment surrounding the chimney and propel the hot air resulting in this external environment.
D'autres caractéristiques, avantages et détails ressortiront de la description explicative qui va suivre faite en référence aux dessins annexés donnés uniquement à titre d'exemple et dans lesquels : la figure 1 est une vue en perspective avec arrachement partiel d'un dispositif formant brûleur conforme à 1 ' invention ; la figure 2 est une vue en coupe avec arrachements partiels suivant la ligne II-II de la figure 1, et la figure 3 est une vue en coupe schématique en élévation d'une cheminée équipée du dispositif conforme à 1 ' invention .Other characteristics, advantages and details will emerge from the explanatory description which follows, given with reference to the appended drawings given solely by way of example and in which: FIG. 1 is a perspective view with partial tearing away of a burner device according to the invention; Figure 2 is a sectional view with partial cutaway along the line II-II of Figure 1, and Figure 3 is a schematic sectional elevation of a chimney equipped with the device according to one invention.
Dans l'exemple considéré ici, le dispositif 1 formant brûleur à gaz et tel que représenté aux figures 1 et 2 comprend un caisson creux 2 à l'intérieur duquel est monté au moins un conduit 3 relié à un dispositif d'alimentation extérieur 4 en communication avec une conduite 5 d'arrivée de gaz .In the example considered here, the device 1 forming a gas burner and as shown in FIGS. 1 and 2 comprises a hollow box 2 inside which is mounted at least one duct 3 connected to an external supply device 4 in communication with a gas supply line 5.
Dans cet exemple, le caisson 2 est de forme parallélipipédique et présente une paroi de fond 8 délimitée par quatre parois latérales externes 9, qui se prolongent chacune, sensiblement à 90° , par un rebord externe 10. Le caisson 2 présente également une partie centrale 11 constituée par une surface plane 12, sensiblement coplanaire avec les rebords externes 10 et reliée à la paroi de fond 8 par quatre parois latérales internes 13. La paroi de fond 8, dans sa partie délimitée par les parois latérales internes 13, présente une ouverture 8a. Les parois latérales externes 9 et internes 13 du caisson 2 délimitent entre elles et avec la paroi de fond 8, l'espace intérieur 14 du caisson 2. Les rebords 10 et la surface 12 du caisson 2 sont percés d'orifices 16 pour des raisons qui seront explicitées plus loin.In this example, the box 2 is of rectangular shape and has a bottom wall 8 delimited by four external side walls 9, which each extend, substantially at 90 °, by an external rim 10. The box 2 also has a central part 11 constituted by a flat surface 12, substantially coplanar with the external flanges 10 and connected to the bottom wall 8 by four internal side walls 13. The bottom wall 8, in its part delimited by the internal side walls 13, has an opening 8a. The external 9 and internal side walls 13 of the box 2 define between them and with the bottom wall 8, the internal space 14 of the box 2. The flanges 10 and the surface 12 of the box 2 are pierced with holes 16 for reasons which will be explained later.
Dans cet exemple, deux conduits 3 sont montés parallèlement l'un à l'autre dans l'espace intérieur 14 du caisson 2, et respectivement de part et d'autre de la partie centrale 11 du caisson 2 bordée par les parois latérales internes 13.In this example, two conduits 3 are mounted parallel to one another in the interior space 14 of the box 2, and respectively on either side of the central part 11 of the box 2 bordered by the internal side walls 13 .
Chaque conduit 3 est constitué par une enveloppe cylindrique tubulaire, d'un diamètre de l'ordre de 30mm par exemple, fermée à une extrémité et dont l'autre extrémité est en communication avec un dispositif d'alimentation 4. Chaque conduit est pourvu d'orifices 17, qui sont avantageusement situés en regard de la paroi de fond 8 du caisson 2.Each conduit 3 is constituted by a tubular cylindrical envelope, with a diameter of the order of 30 mm for example, closed at one end and the other end of which is in communication with a supply device 4. Each duct is provided with orifices 17, which are advantageously located opposite the bottom wall 8 of the box 2.
Le dispositif d'alimentation 4 associé à chaque conduit 3 se présente sous la forme d'une enceinte cylindrique 20 fermée à une extrémité par une paroi 21 ouverte à l'autre extrémité et délimitant une chambre intérieure 22. La conduite 5 d'arrivée de gaz pénètre, de manière étanche, à l'intérieur de la chambre 22 par la paroi 21, et est équipée à son extrémité d'un gicleur 23.The supply device 4 associated with each duct 3 is in the form of a cylindrical enclosure 20 closed at one end by a wall 21 open at the other end and delimiting an interior chamber 22. The inlet pipe 5 of gas penetrates, sealingly, inside the chamber 22 through the wall 21, and is equipped at its end with a nozzle 23.
L'enceinte 20 est percée d'orifices 24 pour mettre en communication la chambre 22 avec le milieu extérieur. L'enceinte 20, a son extrémité ouverte bordée d'une bride fixée autour d'une ouverture 25 prévue dans la paroi latérale externe 9 correspondante, de manière à ce que la chambre 22 et notamment le gicleur 23 soient sensiblement axialement alignés avec le conduit 3 associé.The enclosure 20 is pierced with orifices 24 to put the chamber 22 in communication with the outside environment. The enclosure 20 has its open end bordered by a flange fixed around an opening 25 provided in the corresponding external side wall 9, so that the chamber 22 and in particular the nozzle 23 are substantially axially aligned with the duct 3 associated.
Le dispositif d'alimentation est complété par un dispositif mélangeur qui est constitué dans cet exemple par un tube venturi 18 monté à l'intérieur du conduit 3, l'entrée du tube 18 venant sensiblement au niveau de l'extrémité ouverte du conduit 3 pour former l'entrée de celui-ci. Le tube 18 s'étend à l'intérieur du conduit 3 sur une longueur qui est de l'ordre du quart de la longueur du conduit 3. Comme représenté à la figure 2, l'espace intérieur 14 du caisson 2 est rempli d'un matériau non combustible 25, tel de la vermiculite qui se présente sous la forme de granulés. Ce matériau non combustible est également déposé sur les rebords 10 de la partie centrale 11 du caisson 2. Une application du dispositif 1 formant brûleur tel que décrit précédemment, est représentée de manière schématique à la figure 3 où le dispositif est monté à l'intérieur de l'âtre d'une cheminée 30 à foyer fermé pour constituer un appareil de chauffage. Une enceinte 31 encastrée dans l'âtre de la cheminéeThe supply device is supplemented by a mixing device which is constituted in this example by a venturi tube 18 mounted inside the conduit 3, the inlet of the tube 18 coming substantially at the open end of the conduit 3 for form the entrance to it. The tube 18 extends inside the conduit 3 over a length which is of the order of a quarter of the length of the conduit 3. As shown in FIG. 2, the interior space 14 of the box 2 is filled with a non-combustible material 25, such as vermiculite which is in the form of granules. This non-combustible material is also deposited on the edges 10 of the central part 11 of the box 2. An application of the device 1 forming a burner as described above, is shown diagrammatically in FIG. 3 where the device is mounted inside the hearth of a fireplace 30 with a closed hearth to constitute a heating appliance. An enclosure 31 embedded in the hearth of the fireplace
30 comprend une paroi inférieure 32, deux parois de côté (non représentées) , une paroi avant 33 équipée d'une porte de fermeture translucide 34, une paroi arrière 35 et une paroi supérieure 36. Des ouvertures ou ouïes 37 supérieures et des ouïes inférieures 38 sont respectivement prévues sur la paroi avant 32 de part et d'autre de la porte 35. Un échangeur de chaleur E est monté à l'intérieur de l'enceinte 31 et vers la partie supérieure de celle-ci. L' échangeur E communique, d'une part, avec l'extérieur par les ouïes 37 et, d'autre part, par des ouvertures 39 et par une ouverture 40 prévue dans la paroi supérieure 35 de l'enceinte 31, avec un conduit de cheminée 41. Une paroi intermédiaire 42 parallèle à la paroi arrière 34 de l'enceinte 31 et proche de celle-ci délimite un conduit arrière 43 qui communique, d'une part, à sa partie supérieure avec 1 ' échangeur E et, d'autre part, à sa partie inférieure avec les ouïes 38.30 includes a bottom wall 32, two side walls (not shown), a front wall 33 fitted with a translucent closing door 34, a rear wall 35 and an upper wall 36. Upper openings or openings 37 and lower openings 38 are provided on the front wall 32 respectively. 'other of the door 35. A heat exchanger E is mounted inside the enclosure 31 and towards the upper part thereof. The exchanger E communicates, on the one hand, with the outside by the gills 37 and, on the other hand, by openings 39 and by an opening 40 provided in the upper wall 35 of the enclosure 31, with a conduit chimney 41. An intermediate wall 42 parallel to the rear wall 34 of the enclosure 31 and close to the latter delimits a rear duct 43 which communicates, on the one hand, at its upper part with the exchanger E and, d on the other hand, in its lower part with the gills 38.
Le dispositif 1 formant brûleur est monté à l'intérieur de l'enceinte 31 et repose par exemple sur des supports 45 ménagés à cet effet sur la paroi inférieure 31, de manière à ce que de l'air provenant des ouïes inférieures 38 puisse pénétrer à l'intérieur de la partie centrale 11 du caisson 2.The device 1 forming a burner is mounted inside the enclosure 31 and rests, for example, on supports 45 provided for this purpose on the lower wall 31, so that air coming from the lower vents 38 can penetrate inside the central part 11 of the box 2.
Des bûches 50 en un matériau non combustible sont disposées, d'une manière appropriée, sur le matériau non combustible 25 qui remplit le caisson 2 et qui forme un lit de diffusion.Logs 50 of a non-combustible material are suitably arranged on the non-combustible material 25 which fills the box 2 and which forms a diffusion bed.
Le gaz sous pression provenant de chaque conduite 5 sort du gicleur 23 et pénètre dans la chambre 22 du dispositif d'alimentation 4 associé. La pression du gaz entraîne l'air ou air primaire présent dans la chambre 22 et provenant de l'extérieur par les orifices 24, à l'intérieur du tube venturi 18 où s'effectue le mélange gaz-air primaire. Ce mélange se propage ensuite à l'intérieur de chaque conduit 3, est éjecté par les orifices 17 des conduits 3 et se diffuse à l'intérieur du lit de diffusion 25. Vers la partie supérieure du lit de diffusion 25, notamment au niveau des rebords 10 et de la partie centrale 11 du caisson 2, le mélange gaz-air primaire se combine à l'air ou air secondaire injecté dans le lit de diffusion par les orifices 16 prévus dans les rebords 10 et dans la partie centrale 11 du caisson 2. Le mélange qui s 'échappe au-dessus du lit de diffusionThe pressurized gas from each line 5 leaves the nozzle 23 and enters the chamber 22 of the associated supply device 4. The pressure of the gas drives the air or primary air present in the chamber 22 and coming from the outside through the orifices 24, inside the venturi tube 18 where the primary gas-air mixture takes place. This mixture then propagates inside each conduit 3, is ejected through the orifices 17 of the conduits 3 and diffuses inside the diffusion bed 25. Towards the upper part of the diffusion bed 25, in particular at the level of the ledges 10 and the central part 11 of the box 2, the primary gas-air mixture combines with the air or secondary air injected into the diffusion bed through the orifices 16 provided in the flanges 10 and in the central part 11 of the box 2. The mixture which escapes above the broadcast bed
25 est enflammé et brûle autour des bûches 50. On constate alors que les flammes résultantes ont une couleur à prédominance bleue, ce qui témoigne d'une combustion quasi complète du gaz ou combustion dite hygiénique par les spécialistes du gaz, notamment grâce à l'air secondaire injecté dans le lit de diffusion 25.25 is ignited and burns around the logs 50. It is then observed that the resulting flames have a predominantly blue color, which testifies to an almost complete combustion of the gas or combustion known as hygienic by gas specialists, in particular thanks to the secondary air injected into the diffusion bed 25.
Avantageusement, l'épaisseur du matériau non combustible 25 situé sur les rebords 10 et la partie centrale 11 du caisson 2 peut être ajustée pour régler l'apport en air secondaire. Plus cette épaisseur est faible, plus l'air secondaire apporté à la combustion du gaz est importante. La quantité de gaz admise dans chaque dispositif d'alimentation 4 est elle même réglable au moyen d'une vanne non représentée. L'invention n'est nullement limitée au mode de réalisation décrit et inclut les variantes de réalisation concernant notamment la forme du caisson et le dispositif d'alimentation qui assure le mélange gaz-air primaire. Advantageously, the thickness of the non-combustible material 25 located on the flanges 10 and the central part 11 of the box 2 can be adjusted to regulate the supply of secondary air. The smaller this thickness, the greater the secondary air supplied to the combustion of the gas. The quantity of gas admitted into each supply device 4 is itself adjustable by means of a valve not shown. The invention is in no way limited to the embodiment described and includes variant embodiments concerning in particular the shape of the box and the supply device which ensures the primary gas-air mixture.

Claims

REVENDICATIONS
1) Dispositif formant brûleur à gaz, notamment pour appareil de chauffage où la combustion du gaz s'effectue autour d'éléments non combustibles ayant l'apparence de bûches de bois par exemple, du type comprenant au moins un conduit de gaz percé d'orifices, placé à l'intérieur d'un caisson ouvert rempli d'un matériau non combustible formant lit de diffusion pour le gaz, et alimenté par un mélangge gaz-air primaire, caractérisé en ce que ledit conduit de gaz (3) étant adapté à diriger le mélange gaz-air primaire vers le fond (8) du lit de diffusion, une pluralité d'orifices1) Device forming a gas burner, in particular for a heating appliance in which the combustion of gas takes place around non-combustible elements having the appearance of wood logs for example, of the type comprising at least one gas pipe pierced with orifices, placed inside an open box filled with a non-combustible material forming a diffusion bed for the gas, and supplied by a primary gas-air mixture, characterized in that said gas conduit (3) being adapted directing the primary gas-air mixture towards the bottom (8) of the diffusion bed, a plurality of orifices
(16) de distribution d'air secondaire est ménagée au niveau - supérieur de ce lit de diffusion.(16) secondary air distribution is provided at the upper level of this diffusion bed.
2) Dispositif selon la revendication 1, caractérisé en ce qu'un ensemble d'orifices (16) d'air secondaire s'étend autour du lit de diffusion (25) .2) Device according to claim 1, characterized in that a set of orifices (16) of secondary air extends around the diffusion bed (25).
3) Dispositif selon la revendication 1 ou 2 , caractérisé en ce qu'un ensemble d'orifices (16) d'air secondaire s'étend sur une partie centrale du lit de diffusion ( 25) . 4) Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ledit caisson (2) présente sur son pourtour un rebord (10) percé d'orifices (16) d'air secondaire.3) Device according to claim 1 or 2, characterized in that a set of orifices (16) of secondary air extends over a central part of the diffusion bed (25). 4) Device according to any one of claims 1 to 3, characterized in that said box (2) has on its periphery a flange (10) pierced with orifices (16) of secondary air.
5) Dispositif selon la revendication 4, caractérisé en ce que le lit de diffusion (25) en matériau non combustible qui remplit le caisson (2) , s'étend sur ledit rebord (10) .5) Device according to claim 4, characterized in that the diffusion bed (25) of non-combustible material which fills the box (2), extends over said flange (10).
6) Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que ledit caisson (2) présente une partie centrale (11) qui s'élève à partir de sa paroi de fond (8) et dont la partie supérieure (12) sensiblement plane et coplanaire avec ledit rebord (10), est percée d'orifices (16) d'air secondaire.6) Device according to any one of claims 1 to 5, characterized in that said box (2) has a central part (11) which rises from its bottom wall (8) and whose upper part ( 12) substantially planar and coplanar with said flange (10), is pierced with orifices (16) of secondary air.
7) Dispositif selon la revendication 6, caractérisé en ce que le lit de diffusion (25) en matériau non combustible qui remplit l'intérieur du caisson (2) , recouvre ladite partie centrale (11) .7) Device according to claim 6, characterized in that the diffusion bed (25) of non-combustible material which fills the interior of the box (2), covers said central part (11).
8) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les orifices (17) de chaque conduit (3) sont situés sensiblement en regard de la paroi de fond (8) du caisson (2) .8) Device according to any one of the preceding claims, characterized in that the orifices (17) of each duct (3) are located substantially opposite the bottom wall (8) of the box (2).
9) Dispositif selon l'une quelconque des revendications 1 à 8, équipé d'un dispositif d'alimentation (4) comprenant un gicleur (23) monté à l'intérieur d'une chambre (22) communiquant à l'extérieur par des orifices (24) constituant chacun une arrivée d'air primaire, caractériséen ce que ladite chambre (22) communique avec le conduit (3) par l'intermédiaire d'un dispositif mélangeur constitué par un tube venturi (18) monté à l'intérieur du conduit (3).9) Device according to any one of claims 1 to 8, equipped with a supply device (4) comprising a nozzle (23) mounted inside a chamber (22) communicating outside by orifices (24) each constituting a primary air inlet, characterized in that said chamber (22) communicates with the duct (3) by means of a mixing device constituted by a venturi tube (18) mounted inside of the duct (3).
10) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'air primaire et l'air secondaire sont prélevés du milieu extérieur environnant. 10) Device according to any one of the preceding claims, characterized in that the primary air and the secondary air are taken from the surrounding external environment.
PCT/FR1988/000351 1987-07-01 1988-07-01 Device forming a gas burner, in particular for heating appliance WO1989000267A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT88905895T ATE80933T1 (en) 1987-07-01 1988-07-01 GAS BURNER, ESPECIALLY FOR HEATING APPLIANCES.
DE8888905895T DE3874871D1 (en) 1987-07-01 1988-07-01 GAS BURNER, ESPECIALLY FOR HEATER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8709317A FR2617576B1 (en) 1987-07-01 1987-07-01 GAS BURNER FORMING DEVICE, ESPECIALLY FOR A HEATING APPARATUS
FR87/09317 1987-07-01

Publications (1)

Publication Number Publication Date
WO1989000267A1 true WO1989000267A1 (en) 1989-01-12

Family

ID=9352748

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1988/000351 WO1989000267A1 (en) 1987-07-01 1988-07-01 Device forming a gas burner, in particular for heating appliance

Country Status (5)

Country Link
EP (1) EP0323502B1 (en)
AT (1) ATE80933T1 (en)
DE (1) DE3874871D1 (en)
FR (1) FR2617576B1 (en)
WO (1) WO1989000267A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6769906B1 (en) * 2002-08-08 2004-08-03 James E. Grove Fire effect appliance
DE10358791A1 (en) * 2003-12-12 2005-08-04 Carl Freudenberg Kg Combined sensor and heating element
DE10358793A1 (en) * 2003-12-12 2005-08-04 Carl Freudenberg Kg Combined sensor and heating element

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1337472C (en) * 1989-01-23 1995-10-31 Le Baigue & Co. Ltd. Domestic gas fires
GB8905011D0 (en) * 1989-03-04 1989-04-19 Thurlow Alan Gas fire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1173819A (en) * 1967-05-26 1969-12-10 Jack Irvine Imitation Solid Fuel Fire
BE856759R (en) * 1977-07-12 1977-10-31 Berger Jules OPEN FIRE FOR RECOVERY
US4110063A (en) * 1975-07-03 1978-08-29 Mitchell Douglas Allison Gas fire
FR2420091A1 (en) * 1978-03-14 1979-10-12 Berger Jules Domestic open heat storage fire - has compressed air pipe with multiple nozzles alongside gas jet pipe on base
GB2147994A (en) * 1983-09-12 1985-05-22 Thomas Raymond Collier Gas fire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1173819A (en) * 1967-05-26 1969-12-10 Jack Irvine Imitation Solid Fuel Fire
US4110063A (en) * 1975-07-03 1978-08-29 Mitchell Douglas Allison Gas fire
BE856759R (en) * 1977-07-12 1977-10-31 Berger Jules OPEN FIRE FOR RECOVERY
FR2420091A1 (en) * 1978-03-14 1979-10-12 Berger Jules Domestic open heat storage fire - has compressed air pipe with multiple nozzles alongside gas jet pipe on base
GB2147994A (en) * 1983-09-12 1985-05-22 Thomas Raymond Collier Gas fire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6769906B1 (en) * 2002-08-08 2004-08-03 James E. Grove Fire effect appliance
DE10358791A1 (en) * 2003-12-12 2005-08-04 Carl Freudenberg Kg Combined sensor and heating element
DE10358793A1 (en) * 2003-12-12 2005-08-04 Carl Freudenberg Kg Combined sensor and heating element

Also Published As

Publication number Publication date
FR2617576A1 (en) 1989-01-06
FR2617576B1 (en) 1991-04-12
DE3874871D1 (en) 1992-10-29
EP0323502A1 (en) 1989-07-12
ATE80933T1 (en) 1992-10-15
EP0323502B1 (en) 1992-09-23

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