EP0391818B1 - Gas burner unit for radiant tube heater - Google Patents

Gas burner unit for radiant tube heater Download PDF

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Publication number
EP0391818B1
EP0391818B1 EP90420170A EP90420170A EP0391818B1 EP 0391818 B1 EP0391818 B1 EP 0391818B1 EP 90420170 A EP90420170 A EP 90420170A EP 90420170 A EP90420170 A EP 90420170A EP 0391818 B1 EP0391818 B1 EP 0391818B1
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EP
European Patent Office
Prior art keywords
burner
chamber
mixing
burner unit
casing
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.)
Expired - Lifetime
Application number
EP90420170A
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German (de)
French (fr)
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EP0391818A1 (en
Inventor
Franck Duverger
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Gaz Industrie SA
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Gaz Industrie SA
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Publication date
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Publication of EP0391818A1 publication Critical patent/EP0391818A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/126—Radiant burners cooperating with refractory wall surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/06—Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated
    • F24D5/08—Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated with hot air led through radiators
    • 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
    • F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame

Definitions

  • the present invention relates to radiant tube heaters using, as heating energy, the combustion of a combustible gas taken from a distribution network.
  • radiant tube heater it is necessary to consider all the structures currently known including continuous tube systems, although the invention finds a particular preferred application to unitary heaters of the type of those with a pin tube.
  • the devices of the above type include a burner block intended to perform several simultaneous functions.
  • the first is to support the burner itself, as well as these operating accessories.
  • the second is to ensure the combustion air supply to the burner.
  • the third is that of connection to the tube in which the burner flame develops.
  • the presently known burner blocks can be considered as giving only moderately satisfaction in performing the above functions due to a design structural that does not allow assembly and disassembly of the burner group for maintenance or change and / or does not provide effective protection, in particular against flashbacks of the supply, control and piloting devices of the operation of the burner.
  • the object of the present invention is to remedy the above drawbacks by proposing a new burner block particularly designed to meet the desired objectives, being of simple construction and easy assembly, which may involve the construction of functional sub-assemblies independent able to be combined in a last simple assembly and adaptation operation to constitute a burner block directly adaptable to a gas heating appliance.
  • Fig. 1 shows a heating device 1 comprising a burner block 2 and a radiant tube 3 associated with a reflector 4.
  • the radiant tube 3 is constituted by a segment of outgoing tube 5 and a segment of return tube 6 from which a mechanical extraction of the combustion gases is carried out. It should be considered that the object of the invention, in part at least, also applies to heating appliances which consist of a continuous tube which is not necessarily shaped as a pin.
  • the heating appliance is intended to be kept high in a room to be heated by means of suspension means such as 7.
  • the burner block designated as a whole by the reference 2 consists of a casing 10 supporting, in relation to a supporting box 11, a burner group 12 intended to be connected to a network 13 for distributing a pressurized combustible gas .
  • the housing 10 is produced, as shown in FIGS. 2 to 5, to delimit a chamber 14, called mixing and combustion chamber, opening from a flange 15 for mounting the box 11.
  • Chamber 14 is extended, preferably opposite the flange 15, by a sleeve 16 for connecting a radiant tube 5, for example fitted internally and immobilized axially by any suitable means, such as a pressure screw 18.
  • the casing 10 delimits, laterally to the chamber 14, a secondary air intake chamber 19 which has an inlet opening 20 opening from a flange 21 defining an adaptation plane for a filter or a grid not shown.
  • the chamber 19 preferably also has a hole 22 known as an air intake derivative with respect to the main intake authorized by the hearing 20 .
  • the outlet 22 preferably also provided with a grid or a filter, is oriented so as to allow a darning of hot air and is, therefore, located at least near the sleeve 16.
  • the chamber d secondary air intake 19 communicates with the chamber 14, for example at the plane of the flange 15.
  • the chamber 14 is made so as to include a cross 23 for centering and supporting the combustion head 24 of the group 12.
  • the cross 23 is, for example, advantageously formed by fins 25 rising from the peripheral wall internal of the chamber 14 in radial directions, being interrupted at a distance from each other, so as to materialize a seat coaxial with the connection sleeve 16.
  • the casing 10 also has, in one of its walls, an opening 26 allowing the adaptation of an ignition electrode 27 intended to be placed downstream of the head 24 inside the chamber 14, in the combustion part of the latter, being oriented substantially opposite an ignition ring 28 presented by the head 24, as can be seen in FIG. 5.
  • the casing 10 is also advantageously made to comprise, laterally to the chamber 14, a housing 29 opening from the flange 15 and extended by a connection sleeve 30 with an axis parallel to the sleeve 16.
  • the connection sleeve 30 is intended to allow the adaptation by any appropriate means of the open end part of the return tube 6.
  • the housing 29 is intended to contain at least partially a mechanical extractor not shown, for example of the centrifugal type.
  • the housing 29 is made in the form of a volute and communicates with a pipe 31 opening by a discharge opening 32 in the adaptation plane formed by the flange 21.
  • the housing 29 is separated from the chamber d secondary air intake 19, by a partition 33 forming a strip 34 establishing itself in the plane of the flange 15 with which it is connected.
  • the box 11 is constituted by a housing 40, for example but not exclusively, made of sheet metal and having a dropped edge 41 by which it can be adapted and mounted on the flange 15 by means in particular of screws or the like 42.
  • the housing 40 has at least one open wall such as the top and the bottom and comprises an internal firewall 43 dividing it into a chamber 44 for secondary air intake communicating with the ambient environment through the opening of the walls of the housing and into a protective compartment 45.
  • the housing 40 also has a partition wall 46 intended to cooperate with the bar 34. This wall 46 delimits, in the housing 40, a second compartment 47 reserved for the mechanical extractor, as well as its operating and control means.
  • the housing 11 supports the burner group 12 which comprises a support 48 ensuring the attachment of a supply solenoid valve 49 capable of being connected to the network 13.
  • the support 48 comprises a plate 50 known as attachment on the rear wall 51 of the housing 40 and a front wall 52 intended to cooperate with the firewall 43 to mask an opening 53 that the latter has.
  • the support 48 carries, through the cooperation wall, a nozzle holder fitting 54 brought through the opening 53 of the firewall 43.
  • the fitting 54 more particularly illustrated in FIG. 6, carries a removable nozzle 60 and has a socket 61 for internal pressure measurement.
  • the fitting 54 ensures the fixing a burner 62 consisting of a tubular body forming, from an adapter 63 on the fitting 54, a cylindrical part 64 provided with ports 65 for primary air intake, opening in the chamber 44 .
  • the cylindrical portion 64 is extended by a converging portion 66 itself extended by a divergent section 67 leading to the combustion head 24 supported and centered by the spider 23.
  • the head 24 comprises externally a removable shroud 68 forming, in the plane of the open section of the head 24, the crown 28 consisting of an annular ramp 69 of axial holes opening out inside a recess 70 formed between the ferrule 68 and the tubular body which, moreover, has a series of radial holes 71 communicating with the room.
  • the series of holes 71 is formed in the tubular body upstream of an annular flange 72 formed internally by the tubular body, being constituted, for example, by a removable jacket 73.
  • the combustible gas delivered under pressure by the nozzle 60 causes the suction of a primary air constituting with the gas a combustible mixture circulating inside the tubular body in the direction f1. Part of this primary mixture hits the rim 72 and is derived by the series of holes 71 in the direction of the recess 70 to be delivered by the outer peripheral ring 28 bordering the open section of the head 24.
  • the electrode 27 is located in proximity relation with the crown 28, which makes it possible to produce a suitable ignition of the primary fuel mixture diffused at relatively low pressure by the crown 28. Such an ignition then makes it possible to ignite the high pressure combustible torch delivered by the open section of the head 24 and constituted by the main stream of the primary mixture having passed inside the tubular body constituting the burner 62.
  • This pressurized gas torch is associated with the outlet of the burner to the secondary air supplied by the chamber 14 in relation to the intake chamber 19.
  • a pressurized operation possibly variable and modular can then intervene by controlling the solenoid valve 49 by means in particular of the pressure tap 61.
  • the burner block according to the invention is of particularly simple construction, since it involves a main casing assuming the function of delimiting the different rooms, housings and connection sleeves, as well as that of support and centering of the burner and extractor.
  • the casing thus designed also makes it possible to maintain and adapt the box 11 which is responsible for delimiting the secondary air intake chamber 44 and the compartment 45 isolated by the firewall 43 including the passage opening 53 is reconstituted by the cooperation wall 52. In this way, a specific function of support and delimitation of chambers and protective compartments is ensured by a housing which is made in a simple manner, for example only from a sheet folded.
  • the housing 11 also allows the support and quick fixing of the burner group 12 which can be adapted, by being mounted by the rear wall 51, by the fixing plate 50 and by the centering intervening between the head 24 of the burner and the spider 23 . a quick change for cleaning, adjustment or replacement can be assured, since, in addition, the burner group 12 is a subset fully removable.
  • the housing 11 fulfills a double function in the case of application to devices with a pin tube, since, by means of the partition wall 46, it delimits the secondary air intake and intake intake circuit. primary air and isolates the secondary compartment 47 reserved for the extractor which is thus also protected against any risk of flashback by means of this wall 46.

Abstract

Radiant-tube gas-operated heater. Gas burner unit for radiant tube heater, of the type comprising a burner group (12) arranged on a casing (10) delimiting a mixing and combustion chamber (14) extended by a sleeve (16) for connection of a radiant tube, characterised in that: the casing (10) forms a flange (15) for mounting a support case (11), and comprises in its mixing and combustion chamber (14) a centring crossmember (23), the case (11) comprises a chamber (44) for admission of primary air and a protection compartment (45), and the burner group (12) comprises a support (48) bearing a feed electrovalve (49) and a burner (62) which has a combustion head (24) which is centred and supported by the crossmember. Application in heaters with pin-type tube. <IMAGE>

Description

La présente invention concerne les appareils de chauffage à tube radiant utilisant, en tant qu'énergie de chauffage, la combustion d'un gaz combustible prélevé à partir d'un réseau de distribution.The present invention relates to radiant tube heaters using, as heating energy, the combustion of a combustible gas taken from a distribution network.

Par appareil de chauffage à tube radiant, il convient de considérer toutes les structures actuellement connues incluant les systèmes à tube continu, bien que l'invention trouve une application particulière préférée aux appareils de chauffage à caractère unitaire du type de ceux à tube en épingle.By radiant tube heater, it is necessary to consider all the structures currently known including continuous tube systems, although the invention finds a particular preferred application to unitary heaters of the type of those with a pin tube.

Les appareils du type ci-dessus comportent un bloc brûleur destiné à assurer plusieurs fonctions simultanées.The devices of the above type include a burner block intended to perform several simultaneous functions.

La première est celle de supporter le brûleur proprement dit, ainsi que ces accessoires de fonctionnement.The first is to support the burner itself, as well as these operating accessories.

La seconde est d'assurer l'alimentation en air de combustion du brûleur.The second is to ensure the combustion air supply to the burner.

La troisième est celle de raccordement au tube dans lequel la flamme du brûleur se développe.The third is that of connection to the tube in which the burner flame develops.

Les blocs-brûleurs actuellement connus (voir, par exemple, FR-A-2 223 630 et FR-A-2 560 359) peuvent être considérés comme ne donnant que moyennement satisfaction pour assurer les fonctions ci-dessus en raison d'une conception structurelle ne permettant pas un montage-démontage du groupe brûleur en vue de son entretien ou son changement et/ou n'assurant pas une protection efficace, notamment contre les retours de flamme des appareils d'alimentation, de contrôle et de pilotage du fonctionnement du brûleur.The presently known burner blocks (see, for example, FR-A-2 223 630 and FR-A-2 560 359) can be considered as giving only moderately satisfaction in performing the above functions due to a design structural that does not allow assembly and disassembly of the burner group for maintenance or change and / or does not provide effective protection, in particular against flashbacks of the supply, control and piloting devices of the operation of the burner.

Un autre inconvénient des blocs-brûleurs connus réside dans le fait qu'ils sont généralement mal adaptés pour assurer une admission d'air secondaire dans des conditions de plage de température favorable à l'établissement d'une bonne combustion.Another disadvantage of the known burner blocks lies in the fact that they are generally ill-suited for ensuring the admission of secondary air under conditions of temperature range favorable to the establishment of good combustion.

Un inconvénient supplémentaire des blocs-brûleurs connus réside dans le fait qu'ils sont aussi généralement mal adaptés structurellement pour assumer, sous un encombrement le plus faible possible, les fonctions de combustion et d'extraction devant nécessairement être assurées pour aboutir à un fonctionnement optimal d'un appareil de chauffage à tube en épingle.An additional drawback of known burner blocks is that they are also generally poorly adapted structurally to assume, in the smallest possible footprint, the combustion and extraction functions which must necessarily be ensured to result in operation. optimal of a hairpin tube heater.

L'objet de la présente invention est de remédier aux inconvénients ci-dessus en proposant un nouveau bloc-brûleur particulièrement conçu pour répondre aux objectifs recherchés, en étant de construction simple et de montage aisé, pouvant faire intervenir la construction de sous-ensembles fonctionnels indépendants à même d'être réunis en une dernière opération simple de montage et d'adaptation pour constituer un bloc-brûleur directement adaptable sur un appareil de chauffage à gaz.The object of the present invention is to remedy the above drawbacks by proposing a new burner block particularly designed to meet the desired objectives, being of simple construction and easy assembly, which may involve the construction of functional sub-assemblies independent able to be combined in a last simple assembly and adaptation operation to constitute a burner block directly adaptable to a gas heating appliance.

Pour atteindre les objectifs ci-dessus, le bloc-brûleur conforme à l'invention est caractérisé en ce que :

  • le carter forme une bride de montage d'un caisson porteur, comporte dans sa chambre de mélange et de combustion un croisillon de centrage et délimite un circuit d'admission d'air,
  • le caisson comporte une cloison pare-feu le divisant en une chambre d'admission d'air primaire et en un compartiment de protection,
  • et le groupe brûleur comprend un support adaptable sur le caisson et portant, d'une part, une électrovanne d'alimentation disposée dans le compartiment de protection et, en relation avec cette dernière, d'autre part, un brûleur traversant la cloison pare-feu, s'étendant dans la chambre d'admission d'air primaire et dans la chambre de mélange et de combustion et possédant une tête de combustion centrée et portée par le croisillon.
To achieve the above objectives, the burner block according to the invention is characterized in that:
  • the casing forms a mounting flange for a support box, comprises in its mixing and combustion chamber a centering spider and delimits an air intake circuit,
  • the box has a firewall dividing it into a primary air intake chamber and a protective compartment,
  • and the burner group comprises a support adaptable to the box and carrying, on the one hand, a supply solenoid valve disposed in the protective compartment and, in relation to the latter, on the other hand, a burner passing through the protective partition fire, extending in the primary air intake chamber and in the mixing and combustion chamber and having a combustion head centered and carried by the spider.

Diverses autres caractéristiques ressortent de la description faite ci-dessous en référence aux dessins annexés qui montrent, à titre d'exemple non limitatif, une forme de réalisation de l'objet de l'invention.

  • La fig. 1 est une vue schématique d'un appareil de chauffage à tube radiant comportant un bloc-brûleur conforme à l'invention.
  • La fig. 2 est une coupe-élévation prise, à plus grande échelle, sensiblement selon le plan II-II de la fig. 1.
  • La fig. 3 est une vue en plan prise selon la ligne III-III de la fig. 2.
  • La fig. 4 est une vue latérale prise selon la ligne IV-IV de la fig. 3.
  • La fig. 5 est une coupe transversale partielle prise selon la ligne V-V de la fig. 2.
  • La fig. 6 est une coupe-élévation axiale montrant, à plus grande échelle, des détails constructifs de l'un des éléments selon la fig. 2.
Various other characteristics will emerge from the description given below with reference to the appended drawings which show, by way of nonlimiting example, an embodiment of the subject of the invention.
  • Fig. 1 is a schematic view of a radiant tube heater comprising a burner block according to the invention.
  • Fig. 2 is a sectional elevation taken, at a larger scale, substantially along plane II-II of FIG. 1.
  • Fig. 3 is a plan view taken along line III-III of FIG. 2.
  • Fig. 4 is a side view taken along line IV-IV of FIG. 3.
  • Fig. 5 is a partial cross section taken along the line VV of FIG. 2.
  • Fig. 6 is an axial sectional elevation showing, on a larger scale, constructive details of one of the elements according to FIG. 2.

La fig. 1 montre un appareil de chauffage 1 comprenant un bloc-brûleur 2 et un tube radiant 3 associé à un réflecteur 4. Selon l'exemple représenté, le tube radiant 3 est constitué par un segment de tube aller 5 et un segment de tube retour 6 à partir duquel une extraction mécanique des gaz de combustion est effectuée. Il doit être considéré que l'objet de l'invention, pour partie au moins, s'applique également aux appareils de chauffage qui sont constitués par un tube continu non obligatoirement conformé en épingle. Fig. 1 shows a heating device 1 comprising a burner block 2 and a radiant tube 3 associated with a reflector 4. According to the example shown, the radiant tube 3 is constituted by a segment of outgoing tube 5 and a segment of return tube 6 from which a mechanical extraction of the combustion gases is carried out. It should be considered that the object of the invention, in part at least, also applies to heating appliances which consist of a continuous tube which is not necessarily shaped as a pin.

Dans tous les cas, l'appareil de chauffage est destiné à être maintenu en hauteur dans un local à chauffer par l'intermédiaire de moyens de suspensions tels que 7. In all cases, the heating appliance is intended to be kept high in a room to be heated by means of suspension means such as 7.

Le bloc-brûleur désigné dans son ensemble par la référence 2 est constitué d'un carter 10 supportant, en relation avec un caisson porteur 11, un groupe brûleur 12 destiné à être raccordé à un réseau 13 de distribution d'un gaz combustible sous pression.The burner block designated as a whole by the reference 2 consists of a casing 10 supporting, in relation to a supporting box 11, a burner group 12 intended to be connected to a network 13 for distributing a pressurized combustible gas .

Le carter 10 est réalisé, comme représenté aux fig. 2 à 5, pour délimiter une chambre 14, dite de mélange et de combustion, s'ouvrant à partir d'une bride 15 de montage du caisson 11. La chambre 14 est prolongée, de préférence à l'opposé de la bride 15, par un manchon 16 de raccordement d'un tube radiant 5, par exemple emboîté intérieurement et immobilisé axialement par tout moyen approprié, tel qu'une vis de pression 18. Le carter 10 délimite, latéralement à la chambre 14, une chambre 19 d'admission d'air secondaire qui possède une ouïe d'admission 20 s'ouvrant à partir d'une collerette 21 définissant un plan d'adaptation pour un filtre ou une grille non représentée. La chambre 19 possède, de préférence également, une ouïe 22 dite d'admission d'air dérivée par rapport à l'admission principale autorisée par l'ouïe 20. L'ouïe 22, de préférence aussi pourvue d'une grille ou d'un filtre, est orientée de manière à permettre une reprisé d'air chaud et se trouve, en conséquence, située au moins à proximité du manchon 16. La chambre d'admission d'air secondaire 19 communique avec la chambre 14, par exemple au niveau du plan de la bride 15. The housing 10 is produced, as shown in FIGS. 2 to 5, to delimit a chamber 14, called mixing and combustion chamber, opening from a flange 15 for mounting the box 11. Chamber 14 is extended, preferably opposite the flange 15, by a sleeve 16 for connecting a radiant tube 5, for example fitted internally and immobilized axially by any suitable means, such as a pressure screw 18. The casing 10 delimits, laterally to the chamber 14, a secondary air intake chamber 19 which has an inlet opening 20 opening from a flange 21 defining an adaptation plane for a filter or a grid not shown. The chamber 19 preferably also has a hole 22 known as an air intake derivative with respect to the main intake authorized by the hearing 20 . The outlet 22, preferably also provided with a grid or a filter, is oriented so as to allow a darning of hot air and is, therefore, located at least near the sleeve 16. The chamber d secondary air intake 19 communicates with the chamber 14, for example at the plane of the flange 15.

La chambre 14 est réalisée de manière à comporter un croisillon 23 de centrage et de support de la tête de combustion 24 du groupe 12. Le croisillon 23 est, par exemple, avantageusement formé par des ailettes 25 s'élevant à partir de la paroi périphérique interne de la chambre 14 selon des directions radiales en étant interrompues à distance l'une de l'autre, de manière à matérialiser un siège coaxial au manchon de raccordement 16. The chamber 14 is made so as to include a cross 23 for centering and supporting the combustion head 24 of the group 12. The cross 23 is, for example, advantageously formed by fins 25 rising from the peripheral wall internal of the chamber 14 in radial directions, being interrupted at a distance from each other, so as to materialize a seat coaxial with the connection sleeve 16.

Le carter 10 possède, par ailleurs, dans l'une de ses parois, une ouverture 26 permettant l'adaptation d'une électrode d'allumage 27 destinée à être placée en aval de la tête 24 à l'intérieur de la chambre 14, dans la partie de combustion de cette dernière, en étant orientée sensiblement en face d'une couronne d'allumage 28 présentée par la tête 24, comme cela ressort de la fig. 5. The casing 10 also has, in one of its walls, an opening 26 allowing the adaptation of an ignition electrode 27 intended to be placed downstream of the head 24 inside the chamber 14, in the combustion part of the latter, being oriented substantially opposite an ignition ring 28 presented by the head 24, as can be seen in FIG. 5.

Dans le cas d'application spécifique à un appareil de chauffage comportant un tube radiant du type en épingle, comme illustré par la fig. 1, le carter 10 est, en outre, avantageusement réalisé pour comporter, latéralement à la chambre 14, un logement 29 s'ouvrant à partir de la bride 15 et prolongé par un manchon de raccordement 30 d'axe parallèle au manchon 16. Le manchon de raccordement 30 est destiné à permettre l'adaptation par tout moyen approprié de la partie terminale ouverte du tube retour 6. Le logement 29 est destiné à contenir au moins en partie un extracteur mécanique non représentée, par exemple du type centrifuge. A cette fin, le logement 29 est réalisé en forme de volute et communique avec une tubulure 31 s'ouvrant par une ouïe de refoulement 32 dans le plan d'adaptation ménagé par la collerette 21. Le logement 29 est séparé, de la chambre d'admission d'air secondaire 19, par une cloison 33 formant une barrette 34 s'établissant dans le plan de la bride 15 avec laquelle elle se raccorde.In the case of specific application to a heating appliance comprising a radiant tube of the pin type, as illustrated in FIG. 1, the casing 10 is also advantageously made to comprise, laterally to the chamber 14, a housing 29 opening from the flange 15 and extended by a connection sleeve 30 with an axis parallel to the sleeve 16. The connection sleeve 30 is intended to allow the adaptation by any appropriate means of the open end part of the return tube 6. The housing 29 is intended to contain at least partially a mechanical extractor not shown, for example of the centrifugal type. To this end, the housing 29 is made in the form of a volute and communicates with a pipe 31 opening by a discharge opening 32 in the adaptation plane formed by the flange 21. The housing 29 is separated from the chamber d secondary air intake 19, by a partition 33 forming a strip 34 establishing itself in the plane of the flange 15 with which it is connected.

Le caisson 11 est constitué par un boîtier 40, par exemple mais non exclusivement, réalisé en tôle et possédant un bord tombé 41 par lequel il peut être adapté et monté sur la bride 15 au moyen notamment de vis ou analogues 42. Le boîtier 40 possède au moins une paroi ouverte telle que le dessus et le dessous et comprend une cloison interne pare-feu 43 le divisant en une chambre 44 d'admission d'air secondaire comuniquant avec le milieu ambiant par l'ouverture de parois du boîtier et en un compartiment de protection 45. Dans le cas de réalisation en vue de l'application à un appareil du type à tube en épingle, le boîtier 40 possède, par ailleurs, une paroi de séparation 46 destiné à coopérer avec la barrette 34. Cette paroi 46 délimite, dans le boîtier 40, un second compartiment 47 réservé à l'extracteur mécanique, ainsi qu'à ses moyens de commande et de contrôle de fonctionnement.The box 11 is constituted by a housing 40, for example but not exclusively, made of sheet metal and having a dropped edge 41 by which it can be adapted and mounted on the flange 15 by means in particular of screws or the like 42. The housing 40 has at least one open wall such as the top and the bottom and comprises an internal firewall 43 dividing it into a chamber 44 for secondary air intake communicating with the ambient environment through the opening of the walls of the housing and into a protective compartment 45. In the case of production for application to an apparatus of the pin-tube type, the housing 40 also has a partition wall 46 intended to cooperate with the bar 34. This wall 46 delimits, in the housing 40, a second compartment 47 reserved for the mechanical extractor, as well as its operating and control means.

Le boîtier 11 supporte le groupe brûleur 12 qui comprend un support 48 assurant la fixation d'une électrovanne d'alimentation 49 susceptible d'être raccordée au réseau 13. Le support 48 comprend une plaque 50 dite de fixation sur la paroi arrière 51 du boîtier 40 et une paroi frontale 52 destinée à coopérer avec la cloison pare-feu 43 pour masquer une ouverture 53 que présente cette dernière.The housing 11 supports the burner group 12 which comprises a support 48 ensuring the attachment of a supply solenoid valve 49 capable of being connected to the network 13. The support 48 comprises a plate 50 known as attachment on the rear wall 51 of the housing 40 and a front wall 52 intended to cooperate with the firewall 43 to mask an opening 53 that the latter has.

Le support 48 porte, par la paroi de coopération, un raccord porte-gicleur 54 amené à traverser l'ouverture 53 de la cloison pare-feu 43. Le raccord 54, plus particulièrement illustré à la fig. 6, porte un gicleur 60 démontable et possède une prise 61 de mesure de pression interne. Le raccord 54 assure la fixation d'un brûleur 62 constitué par un corps tubulaire formant, à partir d'un embout 63 d'adaptation sur le raccord 54, une partie cylindrique 64 pourvue de lumières 65 d'admission d'air primaire, s'ouvrant dans la chambre 44. La partie cylindrique 64 est prolongée par un convergent 66 lui-même prolongé par un divergent 67 aboutissant à la tête de combustion 24 supportée et centrée par le croisillon 23. La tête 24 comporte extérieurement une virole 68 démontable formant, dans le plan de la section ouverte de la tête 24, la couronne 28 constituée d'une rampe annulaire 69 de trous axiaux débouchant à l'intérieur d'un chambrage 70 ménagé entre la virole 68 et le corps tubulaire qui présente, par ailleurs, une série de trous radiaux 71 communiquant avec le chambrage. La série de trous 71 est ménagée dans le corps tubulaire en amont d'un rebord annulaire 72 formé intérieurement par le corps tubulaire en étant constitué, par exemple, par une chemise démontable 73. The support 48 carries, through the cooperation wall, a nozzle holder fitting 54 brought through the opening 53 of the firewall 43. The fitting 54, more particularly illustrated in FIG. 6, carries a removable nozzle 60 and has a socket 61 for internal pressure measurement. The fitting 54 ensures the fixing a burner 62 consisting of a tubular body forming, from an adapter 63 on the fitting 54, a cylindrical part 64 provided with ports 65 for primary air intake, opening in the chamber 44 . the cylindrical portion 64 is extended by a converging portion 66 itself extended by a divergent section 67 leading to the combustion head 24 supported and centered by the spider 23. the head 24 comprises externally a removable shroud 68 forming, in the plane of the open section of the head 24, the crown 28 consisting of an annular ramp 69 of axial holes opening out inside a recess 70 formed between the ferrule 68 and the tubular body which, moreover, has a series of radial holes 71 communicating with the room. The series of holes 71 is formed in the tubular body upstream of an annular flange 72 formed internally by the tubular body, being constituted, for example, by a removable jacket 73.

Le gaz combustible délivré sous pression par le gicleur 60 provoque l'aspiration d'un air primaire constituant avec le gaz un mélange combustible circulant à l'intérieur du corps tubulaire dans le sens f₁. Une partie de ce mélange primaire heurte le rebord 72 et se trouve dérivée par la série de trous 71 en direction du chambrage 70 pour être délivrée par la couronne périphérique extérieure 28 bordant la section ouverte de la tête 24. Comme cela ressort de la fig. 5 et ainsi qu'il a été précisé ci-avant, l'électrode 27 est située en relation de proximité avec la couronne 28, ce qui permet de réaliser un allumage convenable du mélange combustible primaire diffusé à relativement faible pression par la couronne 28. Un tel allumage permet, ensuite, d'allumer la torche combustible à forte pression délivrée par la section ouverte de la tête 24 et constituée par la veine principale du mélange primaire ayant transité à l'intérieur du corps tubulaire constitutif du brûleur 62. The combustible gas delivered under pressure by the nozzle 60 causes the suction of a primary air constituting with the gas a combustible mixture circulating inside the tubular body in the direction f₁. Part of this primary mixture hits the rim 72 and is derived by the series of holes 71 in the direction of the recess 70 to be delivered by the outer peripheral ring 28 bordering the open section of the head 24. As can be seen in FIG. 5 and as has been specified above, the electrode 27 is located in proximity relation with the crown 28, which makes it possible to produce a suitable ignition of the primary fuel mixture diffused at relatively low pressure by the crown 28. Such an ignition then makes it possible to ignite the high pressure combustible torch delivered by the open section of the head 24 and constituted by the main stream of the primary mixture having passed inside the tubular body constituting the burner 62.

Cette torche de gaz sous pression est associé à la sortie du brûleur à l'air secondaire fourni par la chambre 14 en relation avec la chambre d'admission 19. Un fonctionnement sous pression éventuellement variable et modulable peut intervenir alors par commande de l'électrovanne 49 au moyen notamment de la prise de pression 61. This pressurized gas torch is associated with the outlet of the burner to the secondary air supplied by the chamber 14 in relation to the intake chamber 19. A pressurized operation possibly variable and modular can then intervene by controlling the solenoid valve 49 by means in particular of the pressure tap 61.

Ainsi que cela ressort de ce qui précède, le bloc-brûleur selon l'invention est de construction particulièrement simple, puisqu'il fait intervenir un carter principal assumant la fonction de délimitation des différentes chambres, logements et manchons de raccordement, ainsi que celle de support et de centrage du brûleur et de l'extracteur.As is apparent from the above, the burner block according to the invention is of particularly simple construction, since it involves a main casing assuming the function of delimiting the different rooms, housings and connection sleeves, as well as that of support and centering of the burner and extractor.

Le carter ainsi conçu permet également le maintien et l'adaptation du caisson 11 qui est responsable de la délimitation de la chambre d'admission d'air secondaire 44 et du compartiment 45 isolé par la cloison pare-feu 43 dont l'ouverture de passage 53 est reconstituée par la paroi de coopération 52. De cette manière, une fonction spécifique de support et de délimitation de chambres et de compartiments de protection est assurée par un boîtier qui est réalisé de façon simple, par exemple uniquement à partir d'une tôle pliée.The casing thus designed also makes it possible to maintain and adapt the box 11 which is responsible for delimiting the secondary air intake chamber 44 and the compartment 45 isolated by the firewall 43 including the passage opening 53 is reconstituted by the cooperation wall 52. In this way, a specific function of support and delimitation of chambers and protective compartments is ensured by a housing which is made in a simple manner, for example only from a sheet folded.

Le boîtier 11 permet également le support et la fixation rapide du groupe brûleur 12 qui peut être adapté, en étant monté par la paroi arrière 51, par la plaque de fixation 50 et par le centrage intervenant entre la tête 24 du brûleur et le croisillon 23. Un changement rapide pour nettoyage, réglage ou remplacement peut donc être assuré, puisque, en outre, le groupe brûleur 12 représente un sous-ensemble entièrement démontable.The housing 11 also allows the support and quick fixing of the burner group 12 which can be adapted, by being mounted by the rear wall 51, by the fixing plate 50 and by the centering intervening between the head 24 of the burner and the spider 23 . a quick change for cleaning, adjustment or replacement can be assured, since, in addition, the burner group 12 is a subset fully removable.

Le boîtier 11 assume une double fonction dans le cas d'application aux appareils à tube en épingle, puisque, par l'intermédiaire de la paroi de séparation 46, il délimite le circuit d'admission d'air secondaire et d'admission d'air primaire et isole le compartiment secondaire 47 réservé à l'extracteur qui est ainsi également protégé contre tout risque de retour de flamme par l'intermédiaire de cette paroi 46. The housing 11 fulfills a double function in the case of application to devices with a pin tube, since, by means of the partition wall 46, it delimits the secondary air intake and intake intake circuit. primary air and isolates the secondary compartment 47 reserved for the extractor which is thus also protected against any risk of flashback by means of this wall 46.

Claims (11)

1. Gas burner unit for a radiant tube heating device, of the type comprising a burner assembly (12) adapted to a housing (10) defining a mixing and combustion chamber (14) prolonged by a radiant tube connector sleeve (16),
   characterized in that :
. the casing (10) forms a mounting flange (15) for a support housing (11), contains in its mixing and combustion chamber (14) a centering cross lattice (23) and defines an air admission circuit,
. the housing (11) includes a fire protection wall (43) dividing it into a primary air admission chamber (44) and a safety compartment (45),
. and the burner assembly (12) includes a support (48) adapting to the housing (11) and bearing, on the one hand, a solenoid type supply valve (49) located in the safety compartment (45) and, in relation with said valve, on the other hand, a burner (62) crossing the fire protection wall (43), extending into the primary air admission chamber (44) and into the mixing and combustion chamber (14), and having a combustion head (24) centred and supported by the cross lattice.
2. Burner unit according to claim 1, characterized in that the casing (10) defines, on the one hand, the mixing and combustion chamber (14) prolonged by the sleeve (16) connectable to an ingoing tube (5) and, on the other hand, a mounting enclosure (29) for an extractor which communicates with a connection sleeve (30) adapted to an outgoing radiant tube (6).
3. Burner unit according to claims 1 or 2, characterized in that the casing (10) defines, between the mixing and combustion chamber (14) and the extractor enclosure (29), a secondary air admission chamber (19) opening into the mixing chamber.
4. Burner unit according to one of claims 2 or 3, characterized in that the casing (10) presents, in relation to the secondary air admission chamber, a main principal air admission hole (20) and a displaced air hole (22), opening close to at least the ingoing radiant tube (5).
5. Burner unit according to claim 4, characterized in that the casing (10) includes an interfacing face defining a mounting flange (21) and into which open the principal air admission hole and a back-flow hole (32) communicating with the extractor enclosure (29).
6. Burner unit according to one of claims 1 to 5, characterized in that the casing (10) includes, in the mixing and combustion chamber (14), radially extending winglets (25) defining the centering cross lattice (23).
7. Burner unit according to one of claims 1 to 6, characterized in that the casing (10) has an opening (26) for mounting an ignition electrode (27) located in the mixing and combustion chamber (14) to be situated downstream of the cross lattice (23) opposite the burner head (24) presenting an ignition ring (28).
8. Burner unit according to one of claims 2 to 7, characterized in that the casing (10) forms a flange (15) adapting to the housing (11) and which internally comprises a separating wall (46) isolating the primary air admission chamber (44) from the extractor enclosure and defining a second compartment (47) for mounting and protecting a mechanical extractor.
9. Burner unit according to claim 1, characterized in that the burner (62) itself is composed of a tubular body (67) forming, from an end section (63) fitting to a jet-holder (54) adapter, a cylindrical portion (64) fitted with primary air admission eyelets (65) opening into the primary air admission chamber (44), a convergent portion (66), a divergent portion (67) and a combustion head (24) bearing an ignition and stabilisation ring (28).
10. Burner unit according to claim 9, characterized in that the ring (28) is formed by an annular ramp of holes (69) externally bordering the combustion head (24) and giving into a chamber (70) delimited by a ring (68) joined to the tubular body (62) which presents, upstream of an internal annular edge (72), a series of mixing holes (71) opening into the chamber.
11. Burner unit according to claims 9 or 10, characterized in that the burner (62) extends from a jet-holder connector (54) mounted on the support (48) which comprises a wall (52) cooperating with the fire protection wall and a fixing plate (50) on the housing.
EP90420170A 1989-04-07 1990-04-04 Gas burner unit for radiant tube heater Expired - Lifetime EP0391818B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8904869 1989-04-04
FR8904869A FR2645627B1 (en) 1989-04-07 1989-04-07 GAS BURNER BLOCK FOR RADIANT TUBE HEATER

Publications (2)

Publication Number Publication Date
EP0391818A1 EP0391818A1 (en) 1990-10-10
EP0391818B1 true EP0391818B1 (en) 1992-07-15

Family

ID=9380666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90420170A Expired - Lifetime EP0391818B1 (en) 1989-04-07 1990-04-04 Gas burner unit for radiant tube heater

Country Status (10)

Country Link
EP (1) EP0391818B1 (en)
JP (1) JPH02267408A (en)
KR (1) KR100193283B1 (en)
AT (1) ATE78329T1 (en)
CA (1) CA2014218A1 (en)
DE (1) DE69000192T2 (en)
DK (1) DK0391818T3 (en)
ES (1) ES2034846T3 (en)
FR (1) FR2645627B1 (en)
GR (1) GR3005221T3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1729063A1 (en) * 2005-06-03 2006-12-06 Systema Polska Sp. z o.o. Ceramic radiator
US7654257B2 (en) 2007-05-18 2010-02-02 John Vancak Radiant heater assembly
US8568021B2 (en) 2011-09-29 2013-10-29 Schwank Ltd. Apparatus and method for measuring heat flux from radiant heater
US9080777B2 (en) 2012-01-31 2015-07-14 Schwank, Ltd. Reflector for radiant tube heater
WO2014207782A1 (en) * 2013-06-26 2014-12-31 リンナイ株式会社 Stove burner
IT201600126485A1 (en) * 2016-12-14 2018-06-14 Carlieuklima S R L HEATING SYSTEM WITH RADIANT TAPES
IT201700046757U1 (en) * 2017-04-28 2018-10-28 Carlieuklima S R L HEATING SYSTEM WITH RADIANT TAPES
CN112938092A (en) * 2021-02-26 2021-06-11 芜湖昌立包装有限公司 Novel heat-insulation and heat-preservation carton

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2315231C2 (en) * 1973-03-27 1986-01-02 Walter Dipl.-Ing. 7000 Stuttgart Dreizler Device for burning heating gases
FR2560359B3 (en) * 1984-02-23 1987-04-10 Laurent Francois IMPROVEMENTS ON A GAS BURNER AND RADIANT TUBE HEATER
EP0248629B1 (en) * 1986-06-04 1992-08-12 Ambi-Rad Limited Space heating appliance
FR2609157B1 (en) * 1986-12-26 1990-07-06 Deleage Pierre IMPROVEMENTS ON RADIANT GAS TUBES

Also Published As

Publication number Publication date
DE69000192D1 (en) 1992-08-20
CA2014218A1 (en) 1990-10-07
JPH0379604B2 (en) 1991-12-19
JPH02267408A (en) 1990-11-01
KR100193283B1 (en) 1999-06-15
ATE78329T1 (en) 1992-08-15
DK0391818T3 (en) 1992-08-24
EP0391818A1 (en) 1990-10-10
FR2645627A1 (en) 1990-10-12
GR3005221T3 (en) 1993-05-24
FR2645627B1 (en) 1991-07-19
DE69000192T2 (en) 1993-02-11
KR900016679A (en) 1990-11-14
ES2034846T3 (en) 1993-04-01

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