EP0022599A2 - Automatically closing damper for the injection of combustion air below the hearth of a solid fuel-fired boiler - Google Patents

Automatically closing damper for the injection of combustion air below the hearth of a solid fuel-fired boiler Download PDF

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Publication number
EP0022599A2
EP0022599A2 EP80200667A EP80200667A EP0022599A2 EP 0022599 A2 EP0022599 A2 EP 0022599A2 EP 80200667 A EP80200667 A EP 80200667A EP 80200667 A EP80200667 A EP 80200667A EP 0022599 A2 EP0022599 A2 EP 0022599A2
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EP
European Patent Office
Prior art keywords
hearth
combustion air
valve
fan
solid fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP80200667A
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German (de)
French (fr)
Other versions
EP0022599A3 (en
Inventor
Bruno Rossi
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.)
THERMOROSSI SpA
Original Assignee
THERMOROSSI SpA
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Publication date
Application filed by THERMOROSSI SpA filed Critical THERMOROSSI SpA
Publication of EP0022599A2 publication Critical patent/EP0022599A2/en
Publication of EP0022599A3 publication Critical patent/EP0022599A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L1/00—Passages or apertures for delivering primary air for combustion 
    • F23L1/02—Passages or apertures for delivering primary air for combustion  by discharging the air below the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L3/00—Arrangements of valves or dampers before the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2057—Arrangement or mounting of control or safety devices for water heaters using solid fuel

Definitions

  • the present invention relates to a valve with automatic closure, capable of limiting the injection of combustion air under the hearth of a solid fuel boiler.
  • this arrangement does not allow the combustion air intake to be completely shut off when the fan is stopped, so that, as a result of natural draft, this air continues to penetrate under the hearth and to supply the flame, even reduced.
  • the invention relates to a valve mounted for rotation on an axis disposed in its upper part, which valve is lifted by the air current produced by the fan and falls back on the mouth intended for admission. combustion air by completely closing it when said fan is stopped.
  • a screw capable of being adjusted in position and thus constituting an end-of-travel stop capable of limiting the opening of the valve in order to prevent the latter from being excessively lifted by the current. air when the fan is running.
  • the invention is illustrated in the accompanying drawing, the single figure of which is an axial vertical section of the mouth. for injecting combustion air under the fireplace using a fan.
  • the assembly shown is mounted on a door 1 provided with a closing handle 2, said door being disposed in the lower part of the hearth of a boiler 3 intended for the production of hot water.
  • a closing handle 2 In the bottom of this door 1 is formed an opening 4 made below the grid 5 on which burns the solid fuel (wood or coal) which feeds the hearth.
  • the door In the axis of the opening 4 the door is integral with a duct 6 on the free end of which is mounted the fan 7 which supplies the hearth with combustion air.
  • a co-axial tube 8 cut in a bevel, suitable for being closed by a flap or valve 9 mounted for rotation on an axis 10, which is arranged at its upper part.
  • valve 9 remains raised to the position in broken lines, while when following the increase in the temperature of the water in the boiler said fan 7 stops, this valve falls back to the position shown in solid lines, thereby closing the duct 6.
  • the adjustment of the screw 12 makes it possible to determine the opening amplitude of the valve 9 depending on the combustion conditions you want to obtain in the fireplace.
  • the weight of the valve 9 must be determined so as to allow it to be lifted under the effect of the current of combustion air which moves in the direction of arrow 11, but this valve must not be too light so that the natural draft which intervenes when the fan 7 is stopped cannot cause its untimely lifting.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid-Fuel Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

Automatically closing damper for the injection of combustion air below the hearth of a solid fuel-fired boiler. It consists of a flap (9) articulated by its upper edge so as to open under the effect of the current of air caused by the fan (7) and to close completely when the latter stops. An adjustable screw (12) makes it possible to limit the extent of the opening movement. Single figure. <IMAGE>

Description

La présente invention a pour objet un clapet à fermeture automatique, propre à limiter l'injection de l'air comburant sous le foyer d'une chaudière à combustible solide.The present invention relates to a valve with automatic closure, capable of limiting the injection of combustion air under the hearth of a solid fuel boiler.

On sait qu'à la suite de la crise dans l'approvisionnement des produits pétroliers, on a actuellement tendance à revenir aux chaudières munies de foyer pour combustibles solides, tels que le bois ou le charbon. Dans ces chaudières il est cependant nécessaire de maintenir de manière stable la température de l'eau, en réglant la combustion en fonction des indications fournies par un thermostat, lequel règle automatiquement le courant d'air comburant produit par un ventilateur qui est lui-même placé sous la dépendance dudit thermostat.We know that following the crisis in the supply of petroleum products, there is currently a tendency to return to boilers fitted with fireplaces for solid fuels, such as wood or coal. In these boilers it is however necessary to maintain a stable temperature of the water, by regulating the combustion according to the indications provided by a thermostat, which automatically regulates the current of combustion air produced by a fan which is itself placed under the dependence of said thermostat.

Cet agencement ne permet toutefois pas de fermer complètement l'admission de l'air comburant lorsque le ventilateur est à l'arrêt, si bien que par suite du tirage naturel cet air continue à pénétrer sous le foyer et.à alimenter la flamme, même de façon réduite.However, this arrangement does not allow the combustion air intake to be completely shut off when the fan is stopped, so that, as a result of natural draft, this air continues to penetrate under the hearth and to supply the flame, even reduced.

En vue de remédier à cet inconvénient, l'invention vise un clapet monté à rotation sur un axe disposé dans sa partie supérieure, lequel clapet est soulevé par le courant d'air produit par le ventilateur et retombe sur la bouche destinée à l'admission de l'air comburant en fermant complètement celle-ci lorsque ledit ventilateur est arrêté.In order to remedy this drawback, the invention relates to a valve mounted for rotation on an axis disposed in its upper part, which valve is lifted by the air current produced by the fan and falls back on the mouth intended for admission. combustion air by completely closing it when said fan is stopped.

De manière avantageuse on prévoit une vis susceptible d'être réglée en position et de constituer ainsi une butée de fin de course propre à limiter l'ouverture du clapet afin d'empêcher que ce dernier ne soit soulevé de manière excessive par le courant d'air lorsque le ventilateur est en fonctionnement.Advantageously, there is provided a screw capable of being adjusted in position and thus constituting an end-of-travel stop capable of limiting the opening of the valve in order to prevent the latter from being excessively lifted by the current. air when the fan is running.

L'invention est illustrée sur le dessin annexé, dont la figure unique est une coupe verticale axiale de la bouche pour l'injection de l'air comburant sous le foyer à l'aide d'un ventilateur.The invention is illustrated in the accompanying drawing, the single figure of which is an axial vertical section of the mouth. for injecting combustion air under the fireplace using a fan.

L'ensemble représenté est monté sur un portillon 1 pourvu d'une poignée de fermeture 2, ledit portillon étant disposé dans la partie inférieure du foyer d'une chaudière 3 destinée à la production d'eau chaude. Dans le bas de ce portillon 1 est ménagée une ouverture 4 pratiquée au-dessous de la grille 5 sur laquelle brûle le combustible solide (bois ou charbon) qui alimente le foyer. Dans l'axe de l'ouverture 4 le portillon est solidaire d'un conduit 6 sur l'extrémité libre duquel est monté le ventilateur 7 qui alimente le foyer en air comburant.The assembly shown is mounted on a door 1 provided with a closing handle 2, said door being disposed in the lower part of the hearth of a boiler 3 intended for the production of hot water. In the bottom of this door 1 is formed an opening 4 made below the grid 5 on which burns the solid fuel (wood or coal) which feeds the hearth. In the axis of the opening 4 the door is integral with a duct 6 on the free end of which is mounted the fan 7 which supplies the hearth with combustion air.

A l'intérieur du conduit 6 et en vis-à-vis de son extrémité extérieure est prévu un tube co-axial 8 taillé en biseau, propre à être fermé par un volet ou clapet 9 monté à rotation sur un axe 10, lequel est disposé à sa partie supérieure.Inside the conduit 6 and facing its outer end is provided a co-axial tube 8 cut in a bevel, suitable for being closed by a flap or valve 9 mounted for rotation on an axis 10, which is arranged at its upper part.

On comprend que lorsque le ventilateur 7 est à l'arrêt le clapet 9 de par son propre poids ferme complètement la bouche d'injection d'air comburant. Quand par contre le ventilateur 7 fonctionne, le courant d'air qui pénètre dans le conduit 6 selon le sens indiqué par la flèche 11 soulève le clapet 9 pour l'amener à la position indiquée en traits interrompus, en le faisant ainsi pivoter sur son axe 10 d'un angle qui est limité par la vis de butée 12 susceptible d'être aisément réglée en position.It is understood that when the fan 7 is stopped the valve 9 by its own weight completely closes the combustion air injection mouth. When, on the other hand, the fan 7 is operating, the air current which enters the duct 6 in the direction indicated by the arrow 11 raises the valve 9 to bring it to the position indicated in broken lines, thereby making it pivot on its axis 10 by an angle which is limited by the stop screw 12 capable of being easily adjusted in position.

Au cours des périodes de temps durant lesquelles le ventilateur 7 est maintenu en fonctionnement par le thermostat de la chaudière, le clapet 9 reste soulevé à la position en traits interrompus, tandis que lorqu'à la suite de l'augmentation de la température de l'eau dans la chaudière ledit ventilateur 7 s'arrête, ce clapet retombe à la position montrée en traits pleins, en fermant de la sorte le conduit 6. Le réglage de la vis 12 permet de déterminer l'amplitude d'ouverture du clapet 9 en fonction des conditions de combustion qu'on veut obtenir dans le foyer.During the periods of time during which the fan 7 is kept in operation by the boiler thermostat, the valve 9 remains raised to the position in broken lines, while when following the increase in the temperature of the water in the boiler said fan 7 stops, this valve falls back to the position shown in solid lines, thereby closing the duct 6. The adjustment of the screw 12 makes it possible to determine the opening amplitude of the valve 9 depending on the combustion conditions you want to obtain in the fireplace.

Le poids du clapet 9 doit être déterminé de façon à permettre son soulèvement sous l'effet du courant d'air comburant qui se déplace suivant la flèche 11, mais ce clapet ne doit pas être trop léger de façon à ce que le tirage naturel qui intervient lorsque le ventilateur 7 est à l'arrêt ne puisse provoquer son soulèvement intempestif.The weight of the valve 9 must be determined so as to allow it to be lifted under the effect of the current of combustion air which moves in the direction of arrow 11, but this valve must not be too light so that the natural draft which intervenes when the fan 7 is stopped cannot cause its untimely lifting.

On conçoit sans peine les avantages présentés par l'adoption du clapet à fermeture automatique suivant l'invention ; celui-ci permet de régler avec précision la combustion à l'intérieur du foyer à combustibles solides afin de maintenir constante la température de l'eau de la chaudière.It is easy to see the advantages presented by the adoption of the self-closing valve according to the invention; this allows the combustion inside the solid fuel fireplace to be precisely regulated in order to keep the temperature of the boiler water constant.

Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents.It should moreover be understood that the above description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents.

Claims (3)

1. Clapet à fermeture automatique pour l'injection de l'air comburant au-dessous du foyer d'une chaudière à combustibles solides, caractérisé en ce qu'il est constitué par un volet métallique monté à rotation sur un axe disposé sur son bord supérieur, de façon à fermer complètement la bouche pour l'admission de l'air comburant dans le foyer de la chaudière lorsque le ventilateur qui injecte l'air est arrêté sous l'action du thermostat associé à cette dernière, et à s'ouvrir de manière automatique sous l'effet de la pression d'air lorsque le ventilateur précité se remet en fonctionnement.1. Self-closing valve for injecting combustion air below the hearth of a solid fuel boiler, characterized in that it is constituted by a metal shutter rotatably mounted on an axis disposed on its edge upper, so as to completely close the mouth for the admission of the combustion air into the hearth of the boiler when the fan which injects the air is stopped under the action of the thermostat associated with the latter, and to open automatically under the effect of air pressure when the aforementioned fan resumes operation. .2. Clapet suivant la revendication 1, caractérisé en ce qu'il est prévu un organe de butée, réglable en position, qui limite l'amplitude du soulèvement du clapet afin de permettre le réglage de la combustion dans le foyer..2. Valve according to claim 1, characterized in that there is provided a stop member, adjustable in position, which limits the amplitude of lifting of the valve in order to allow the regulation of the combustion in the hearth. 3. Clapet suivant l'une quelconque des revendications 1 et 2, caractérisé en ce que le poids du clapet articulé par son bord supérieur est tel qu'il maintient fermée la bouche d'admission de l'air comburant en dépit du tirage naturel qui s'exerce lorsque le ventilateur est à l'arrêt.3. Valve according to any one of claims 1 and 2, characterized in that the weight of the valve articulated by its upper edge is such that it keeps closed the combustion air intake mouth despite the natural draft which works when the fan is stopped.
EP80200667A 1979-07-11 1980-07-08 Automatically closing damper for the injection of combustion air below the hearth of a solid fuel-fired boiler Withdrawn EP0022599A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT7964293U IT7964293V0 (en) 1979-07-11 1979-07-11 SELF-CLOSING DOOR FOR THE INLET OF COMBUSTION AIR UNDER THE HEART OF A SOLID FUEL BOILER.
IT6429379 1979-07-11

Publications (2)

Publication Number Publication Date
EP0022599A2 true EP0022599A2 (en) 1981-01-21
EP0022599A3 EP0022599A3 (en) 1981-05-27

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EP80200667A Withdrawn EP0022599A3 (en) 1979-07-11 1980-07-08 Automatically closing damper for the injection of combustion air below the hearth of a solid fuel-fired boiler

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EP (1) EP0022599A3 (en)
ES (1) ES252035Y (en)
IT (1) IT7964293V0 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084852A2 (en) * 1982-01-26 1983-08-03 UNICAL S.p.A. Solid fuel steel construction boiler for domestic heating applications
EP0856115A1 (en) * 1995-08-18 1998-08-05 Truss Holdings Pty., Ltd. Control valve
DE19755617A1 (en) * 1997-12-13 1999-06-17 Turbo Lufttechnik Gmbh Combined air and hot flue gas extractor fitted in roof of building
CN1047882C (en) * 1993-10-23 1999-12-29 里塔尔工厂鲁道尔夫洛有限责任公司 Rack for switching cabinets
EP1039223A1 (en) * 1999-03-23 2000-09-27 R.B.L. Riello Bruciatori Legnago Spa Antivibration control device for the flow regulator damper of combustion air in a burner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE509960C (en) * 1930-10-15 Hermann Frank Dipl Ing Procedure for operating boilers with underwind combustion
FR780062A (en) * 1933-11-13 1935-04-18 Fireplace automatic blower control device
US2116911A (en) * 1931-08-22 1938-05-10 Iron Fireman Mfg Co Air flow indicating damper
FR1033033A (en) * 1951-02-23 1953-07-07 Const Thermiques Soc D Further development of automatic coal-fired boilers
GB701155A (en) * 1950-08-01 1953-12-16 Thermofire Engineering Company Improvements in furnaces
FR2325884A1 (en) * 1975-09-24 1977-04-22 Seccacier Hopper fed solid fuel central heating boiler - has separate primary and secondary air fans delivering air above and below grate with water cooled fire bars

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE509960C (en) * 1930-10-15 Hermann Frank Dipl Ing Procedure for operating boilers with underwind combustion
US2116911A (en) * 1931-08-22 1938-05-10 Iron Fireman Mfg Co Air flow indicating damper
FR780062A (en) * 1933-11-13 1935-04-18 Fireplace automatic blower control device
GB701155A (en) * 1950-08-01 1953-12-16 Thermofire Engineering Company Improvements in furnaces
FR1033033A (en) * 1951-02-23 1953-07-07 Const Thermiques Soc D Further development of automatic coal-fired boilers
FR2325884A1 (en) * 1975-09-24 1977-04-22 Seccacier Hopper fed solid fuel central heating boiler - has separate primary and secondary air fans delivering air above and below grate with water cooled fire bars

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084852A2 (en) * 1982-01-26 1983-08-03 UNICAL S.p.A. Solid fuel steel construction boiler for domestic heating applications
EP0084852A3 (en) * 1982-01-26 1983-09-14 UNICAL S.p.A. Solid fuel steel construction boiler for domestic heating applications
CN1047882C (en) * 1993-10-23 1999-12-29 里塔尔工厂鲁道尔夫洛有限责任公司 Rack for switching cabinets
EP0856115A1 (en) * 1995-08-18 1998-08-05 Truss Holdings Pty., Ltd. Control valve
EP0856115A4 (en) * 1995-08-18 1998-11-25 Truss Holdings Pty Ltd Control valve
DE19755617A1 (en) * 1997-12-13 1999-06-17 Turbo Lufttechnik Gmbh Combined air and hot flue gas extractor fitted in roof of building
DE19755617B4 (en) * 1997-12-13 2014-02-27 TROX TLT GmbH flow channel
EP1039223A1 (en) * 1999-03-23 2000-09-27 R.B.L. Riello Bruciatori Legnago Spa Antivibration control device for the flow regulator damper of combustion air in a burner

Also Published As

Publication number Publication date
EP0022599A3 (en) 1981-05-27
ES252035Y (en) 1981-04-16
IT7964293V0 (en) 1979-07-11
ES252035U (en) 1980-11-01

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