FR2493968A1 - Fuel and air supply for gas heated boiler - has top cover with air entry between tube and flue gas outlet - Google Patents

Fuel and air supply for gas heated boiler - has top cover with air entry between tube and flue gas outlet Download PDF

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Publication number
FR2493968A1
FR2493968A1 FR8023787A FR8023787A FR2493968A1 FR 2493968 A1 FR2493968 A1 FR 2493968A1 FR 8023787 A FR8023787 A FR 8023787A FR 8023787 A FR8023787 A FR 8023787A FR 2493968 A1 FR2493968 A1 FR 2493968A1
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FR
France
Prior art keywords
air
mixing chamber
box
tube
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8023787A
Other languages
French (fr)
Other versions
FR2493968B1 (en
Inventor
Jean-Claude Charron
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.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC 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 Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Priority to FR8023787A priority Critical patent/FR2493968B1/en
Priority to PCT/FR1981/000142 priority patent/WO1982001764A1/en
Priority to EP19810401769 priority patent/EP0052055B1/en
Priority to JP50354881A priority patent/JPS6367113B2/ja
Priority to DE8181401769T priority patent/DE3165113D1/en
Priority to AT81401769T priority patent/ATE8705T1/en
Publication of FR2493968A1 publication Critical patent/FR2493968A1/en
Application granted granted Critical
Publication of FR2493968B1 publication Critical patent/FR2493968B1/en
Expired legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/02Casings; Cover lids; Ornamental panels

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

Abstract

The gas heated boiler with a cylindrical casing (1) enclosing a ring of vertical water tubes (7) has the gas and air mixture forced upwards from below to a radial burner (6) in the upper part of the combustion chamber. The air and gas entry chamber is at one side, containing a venturi tube (12) with its axis parallel to that of the burner. An air entry chamber (11) is also formed by a cover (18) over the top, with a large diameter part over the combustion chamber and a small diameter part over the venturi tube. The large diameter part has a hole through it for the exhaust gas outlet (16) and also has an outer tube (17) around it, with a space (20) between for fresh air entry. The gas supply tube (21) passes through another hole in the small diameter part, to discharge into the venturi tube.

Description

L'invention concerne une chaudière étanche à gaz du type à échangeur cylindrique dont une nappe de tubes d'eau entoure une chambre de combustion renfermant un brûleur à air soufflé.The invention relates to a gas-tight boiler of the cylindrical exchanger type, a sheet of water tubes surrounding a combustion chamber containing a blast air burner.

Dans une forme connue de chaudière de ce type dite chaudière à condensation, les gaz de combustion émis par le brûleur radial, traversent les tubes d'eau et sont recueillis dans une coquille cylindrique étanche qui sert d'enveloppe à l'échangeur et qui recueille les produits de combustion s'écoulant ensuite par un conduit d'évacuation raccordé à cette coquille. L'alimentation du brûleur en mélange air gaz s'effectue à partir d'une chambre de mélange alimentée en gaz par un injecteur, un ventilateur étant interposé entre cette chambre et le brûleur.In a known form of boiler of this type called condensing boiler, the combustion gases emitted by the radial burner, pass through the water tubes and are collected in a sealed cylindrical shell which serves as an envelope for the exchanger and which collects the combustion products then flowing through an exhaust duct connected to this shell. The air gas mixture is supplied to the burner from a mixing chamber supplied with gas by an injector, a fan being interposed between this chamber and the burner.

Cet ensemble d'alimentation est habituellement disposé sous le brûleur tandis que l'évacuation est assuree par le conduit dispose à la partie haute de l'échangeur, en prise sur la coquille cylindrique étanche. Cette disposition conduit à des réalisations difficilement encastrables dans une enceinte étanche de dimension restreinte du fait de l'existence d'un côté d'un ensemble d'alimentation avec tubulure et chambre d'admission, et de l'autre d'un boîtier d'évacuation.This supply assembly is usually placed under the burner while the evacuation is ensured by the conduit disposed at the upper part of the exchanger, engaged on the sealed cylindrical shell. This arrangement leads to embodiments which are difficult to fit into a tight enclosure of limited size due to the existence on one side of a supply assembly with tubing and intake chamber, and on the other of a housing d 'evacuation.

Pour éviter cet inconvénient sur le plan dimensionnel en même temps que faciliter la fixation des divers éléments constitutifs de l'appareil l'invention a pour objet une unique boîte de distribution pour l'admission d'air comburant coaxialement à l'e- vacuation des gaz de combustion, boîte qui s'applique sur la coquille étanche et qui sert en outre de support à la chambre de mélange ainsi disposée verticalement le long de l'échangeur.To avoid this drawback on the dimensional level at the same time as facilitating the fixing of the various constituent elements of the device, the invention relates to a single distribution box for the admission of combustion air coaxially with the evacuation of the combustion gas, box which is applied to the sealed shell and which also serves as a support for the mixing chamber thus arranged vertically along the exchanger.

Selon une caractéristique principale de l'invention la boîte à air a une forme oblongue plate, qui reçoit l'air comburant par un orifice concentrique au tube d'évacuation des gaz brûlés et l'évacue par un orifice de plus petit diamètre prévu sur le fond du boitier de l'autre côté et elle s'adapte sur la coquille d'étanchéité enveloppant la chambre de combustion, dont elle constitue le couvercle. According to a main characteristic of the invention, the air box has a flat oblong shape, which receives the combustion air through an orifice concentric with the flue gas discharge tube and discharges it through a smaller diameter orifice provided on the bottom of the case on the other side and it fits on the sealing shell enveloping the combustion chamber, of which it constitutes the cover.

D'autres caractéristiques particulières et avantages de l'in vention apparaîtront à la lecture de la description suivante d'une forme de réalisation en référence aux dessins annexés qui représentent - figure 1 : une vue en coupe schématique éclatée de la chau
dière.
Other particular characteristics and advantages of the invention will appear on reading the following description of an embodiment with reference to the accompanying drawings which represent - Figure 1: a schematic exploded sectional view of the chau
diere.

- figure 2 : une vue en plan vue du dessus.- Figure 2: a plan view seen from above.

La partie centrale de la figure 1 montre un échangeur délimité par une coquille cylindrique 1 qui repose sur un socle inferieur 2 percé d'orifices appropries pour le passage de conduits 3 et 4 d'arrivée et de départ d'eau, et de la tubulure 5 d'admission du mélange gazeux au brûleur radial 6 dispose au centre de l'échangeur.A l'intérieur de la coquille sont disposés verticalement les tubes d'eau 7 qui forment une nappe cylindrique tout autour du brûleur 6, leur forme et leur espacement étant déter- miné pour présenter des surfaces dBecleange importantes avec les gaz de combustion. L'eau circule dans les tubes de la nappe à partir d'un anneau répartiteur inférieur 8 vers un anneau reparti- teur supérieur 9 et inversement, grâce à un jeu de chicanes non représentées localisées dans les anneaux. Le mélange air-gaz provenant de la chambre de mélange est soufflé vers le brûleur par un ventilateur 10 interposé sur la tubulure 5.The central part of FIG. 1 shows an exchanger delimited by a cylindrical shell 1 which rests on a lower base 2 pierced with suitable orifices for the passage of conduits 3 and 4 for the arrival and departure of water, and the tubing 5 for admitting the gas mixture to the radial burner 6 has in the center of the exchanger. Inside the shell are arranged vertically the water tubes 7 which form a cylindrical sheet all around the burner 6, their shape and their spacing being determined to present large dBecleange surfaces with combustion gases. The water circulates in the tubes of the sheet from a lower distributor ring 8 to an upper distributor ring 9 and vice versa, thanks to a set of baffles not shown located in the rings. The air-gas mixture coming from the mixing chamber is blown towards the burner by a fan 10 interposed on the pipe 5.

Une unique boîte de distribution ou bolte à air 11, représentée à la partie supérieure de la figure 1 et à la figure 2, a une forme oblongue plate et s'adapte à la fois sur la bordure supérieure de la coquille 1, mais aussi sur la bordure supérieure de la chambre de mélange 12 disposée parallèlement à 1a coquille en appui sur un prolongement du socle inférieur 2, et par consequent formant un bloc rigide avec l'échangeur.Cette adaptation de la bofte à air 11 sur l'échangeur et la chambre de mélange se fait évidemment de façon étanche grâce à des joints d'étanchéité non représentes, au niveau du grand diamètre de la boîte 11 qui coiffe la coquille cylindrique 1 et du petit diamètre de la boîte qui coiffe la chambre de mélange 12
La face inférieure 13 de la boîte à air 11 forme à la fois, -le couvercle de la chambre de combustion en coiffant la coquille 1, -et l'entretoise qui maintient la partie supérieure de la chambre de mélange du fait qu'elle est munie d'un orifice latéral 14 qui s'adapte à l'orifice superieur de cette chambre de melange.Ladite face inferieure 13 faisant office de couvercle à la chambre de combustion est percée d'un orifice 15, au droit du brûleur 6, sur lequel vient s'adapter la tubulure 16 d'évacuation des gaz brûlés. Celle-ci est disposée de façon connue à I'intérieur et
cotxialement à une autre tubulure 17 de plus grand diamètre pour l'admission d'air frais. Cet ensemble avantageusement coude comme le montre la figure 1, s'adapte sur le capot supérieur 18 de la boite à air 11 auquel il se raccorde de façon étanche par un clips 19. A cet effet le capot superieur est muni d'un orifice 20 de diamètre approprie qui se superpose à l'orifice 15. L'air est donc admis dans la boite à air 11 par l'espace annulaire délimité entre l'orifice 20 et la tubulure d'evacuation des gaz brûlés 16, et pénètre dans la chambre de mélange 12 par l'orifice 14. L'effet d'aspiration provoqué dans le venturi de la chambre 12 favorise le mélange avec le gaz injecté par le tube d'arrivée gaz 21 qui traverse de façon étanche le capot 18 et débouche dans la chambre de mélange par l'orifice 14.
A single distribution box or air box 11, shown in the upper part of FIG. 1 and in FIG. 2, has a flat oblong shape and fits both on the upper edge of the shell 1, but also on the upper edge of the mixing chamber 12 disposed parallel to the shell bearing on an extension of the lower base 2, and consequently forming a rigid block with the exchanger. This adaptation of the air box 11 on the exchanger and the mixing chamber is obviously sealed thanks to seals not shown, at the large diameter of the box 11 which covers the cylindrical shell 1 and the small diameter of the box which covers the mixing chamber 12
The underside 13 of the air box 11 forms at the same time, the cover of the combustion chamber by covering the shell 1, and the spacer which holds the upper part of the mixing chamber because it is provided with a lateral orifice 14 which adapts to the upper orifice of this mixing chamber. Said lower face 13 serving as a cover for the combustion chamber is pierced with an orifice 15, in line with the burner 6, on which fits the pipe 16 for evacuating the burnt gases. This is arranged in a known manner inside and
cotxially to another tube 17 of larger diameter for the admission of fresh air. This advantageously elbow assembly as shown in Figure 1, fits on the upper cover 18 of the air box 11 to which it is tightly connected by a clip 19. For this purpose the upper cover is provided with an orifice 20 of appropriate diameter which is superimposed on the orifice 15. The air is therefore admitted into the air box 11 through the annular space delimited between the orifice 20 and the burnt gas evacuation pipe 16, and enters the mixing chamber 12 through the orifice 14. The suction effect caused in the venturi of the chamber 12 promotes mixing with the gas injected by the gas inlet tube 21 which passes tightly through the cover 18 and opens into the mixing chamber through port 14.

L'invention ne se limite pas à l'exemple de réalisation représenté mais en englobe aussi toutes les variantes constructives. The invention is not limited to the embodiment shown but also encompasses all the constructive variants.

Claims (2)

REVENDICATIONS 1 /-Chaudière étanche du type à échangeur cylindrique formé d'une nappe de tubes d'eau entourant une chambre de com bustion renfermant un brûleur à air soufflé, comportant une admission d'air frais aboutissant à une chambre de mélange alimenté en gaz par un injecteur, comportant un ventilateur entre cette chambre et le brûleur, et une evacuation des gaz brûlés collectés dans une coquille cylindrique qui enveloppe l'échangeur, caractérisoepar le fait que l'admission de l'air frais s'effectue par une boite à air (11) de forme appropriée -traversee par la tubulure (16) d'évacuation des gaz brulés, -boite qui s'adapte à la partie supérieure de la coquille cylindrique (1) dont elle sert de couvercle, qui dirige l'air admis vers l'entrée de la chambre de mélange (12) disposée ver ticalement le long de l'échangeur, et qui sert à maintenir en position ladite chambre de mélange.CLAIMS 1 / - Sealed boiler of the cylindrical heat exchanger type formed by a layer of water tubes surrounding a combustion chamber containing a blast air burner, comprising a fresh air intake leading to a mixing chamber supplied with gas by an injector, comprising a fan between this chamber and the burner, and an evacuation of the burnt gases collected in a cylindrical shell which envelops the exchanger, characterized by the fact that the admission of fresh air is carried out by a air (11) of suitable shape - traversed by the pipe (16) for evacuating burnt gases, - box which adapts to the upper part of the cylindrical shell (1) of which it serves as a cover, which directs the air admitted towards the entrance to the mixing chamber (12) disposed vertically along the exchanger, and which serves to keep said mixing chamber in position. 20/ Chaudière selon la revendication 1, caractérisée par le20 / Boiler according to claim 1, characterized by fait que la boite à air d'épaisseur reduite (11) a une forme causes the reduced thickness air box (11) to have a shape oblongue dont le grand diamètre coiffe la coquille cylindri oblong whose large diameter covers the cylindrical shell que (1) et le petit diamètre la chambre de mélange (12), et that (1) and the small diameter the mixing chamber (12), and que l'admission d'air dans la boîte s'effectue par un orifice that the air is admitted into the box through an orifice (20) concentrique au tube de passage des gaz brûlés, prévu (20) concentric with the flue gas passage tube, provided sur le capot supérieur(18)de la boîte tandis que son passage on the upper cover (18) of the box while its passage Jers la chambre de mélange s'effectue par un orifice(14) The mixing chamber is made through an orifice (14) prévu sur la paroi inférieure (13) de la boite à son extrémité. provided on the bottom wall (13) of the box at its end. 30/ Chaudière selon les revendications 1 et 2 caractérise par le30 / Boiler according to claims 1 and 2 characterized by the fait que le tube d'arrivée gaz (21) à la chambre de mélange causes the gas supply tube (21) to the mixing chamber (12) traverse de façon étanche le capot (18) et débouche dans (12) sealingly crosses the cover (18) and opens into la chambre de mélange par l'orifice (14). the mixing chamber through the orifice (14). 4"/ Chaudière selon les revendications 1 et 2 caractérisa3 par 4 "/ Boiler according to claims 1 and 2 characterized by le fait que l'ensemble constituant la tubulure (16) d'évacua the fact that the assembly constituting the tubing (16) evacuated tion des gaz brules coaxiale à la tubulure (17) d'arrivée d'air tion of burnt gases coaxial with the air inlet pipe (17) s'adapte sur le capot supérieur (18) de la boite à air (11) fits on the top cover (18) of the air box (11) par un système d'accrochage étanche du genre d'un clips (19).  by a watertight attachment system of the type of a clip (19).
FR8023787A 1980-11-07 1980-11-07 WATERPROOF BOILER WITH CYLINDRICAL EXCHANGER Expired FR2493968B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR8023787A FR2493968B1 (en) 1980-11-07 1980-11-07 WATERPROOF BOILER WITH CYLINDRICAL EXCHANGER
PCT/FR1981/000142 WO1982001764A1 (en) 1980-11-07 1981-11-06 Steamtight boiler with cylindrical exchanger
EP19810401769 EP0052055B1 (en) 1980-11-07 1981-11-06 Boiler with sealed combustion chamber and cylindric heat exchanger
JP50354881A JPS6367113B2 (en) 1980-11-07 1981-11-06
DE8181401769T DE3165113D1 (en) 1980-11-07 1981-11-06 Boiler with sealed combustion chamber and cylindric heat exchanger
AT81401769T ATE8705T1 (en) 1980-11-07 1981-11-06 BOILER WITH CLOSED COMBUSTION CHAMBER AND CYLINDRICAL HEAT EXCHANGER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8023787A FR2493968B1 (en) 1980-11-07 1980-11-07 WATERPROOF BOILER WITH CYLINDRICAL EXCHANGER

Publications (2)

Publication Number Publication Date
FR2493968A1 true FR2493968A1 (en) 1982-05-14
FR2493968B1 FR2493968B1 (en) 1985-10-11

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Family Applications (1)

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FR8023787A Expired FR2493968B1 (en) 1980-11-07 1980-11-07 WATERPROOF BOILER WITH CYLINDRICAL EXCHANGER

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FR (1) FR2493968B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105814372A (en) * 2013-12-10 2016-07-27 阿利斯顿特莫股份公司 Cover for condensing boilers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2238123A1 (en) * 1973-07-17 1975-02-14 Haller Meurer Werke Ag

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2238123A1 (en) * 1973-07-17 1975-02-14 Haller Meurer Werke Ag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105814372A (en) * 2013-12-10 2016-07-27 阿利斯顿特莫股份公司 Cover for condensing boilers

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Publication number Publication date
FR2493968B1 (en) 1985-10-11

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