EP2116773A1 - Poêle - Google Patents

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Publication number
EP2116773A1
EP2116773A1 EP09158873A EP09158873A EP2116773A1 EP 2116773 A1 EP2116773 A1 EP 2116773A1 EP 09158873 A EP09158873 A EP 09158873A EP 09158873 A EP09158873 A EP 09158873A EP 2116773 A1 EP2116773 A1 EP 2116773A1
Authority
EP
European Patent Office
Prior art keywords
air stream
stove
flow
air
flue gasses
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Withdrawn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
EP09158873A
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German (de)
English (en)
Inventor
Albert Vromans
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.)
Dovre Nv
Original Assignee
Dovre Nv
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 Dovre Nv filed Critical Dovre Nv
Publication of EP2116773A1 publication Critical patent/EP2116773A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B5/00—Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • F24B5/021—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves combustion-air circulation
    • F24B5/025—Supply of secondary air for completing combustion of fuel

Definitions

  • the invention concerns a stove, comprising a combustion chamber with a first part and a second part, which second part is delimited at a top by a dome, wherein the first part at a bottom has a first air supply to allow a first air stream to flow into the first part in order to allow combustion of a fuel, in particular wood, in the first part, during which combustion flue gasses are generated, and wherein the second part has a second air supply to allow a second air stream to flow into the second part and which second part is provided to post-combust at least part of the flue gasses coming from the first part by means of the second air stream.
  • Such a stove is known from DE 199 11 998 .
  • the first and second parts are separated from each other by a flame plate and the flue gasses pass along a channel between the flame plate and the inner wall of the stove.
  • a first air stream flows towards the inside along the bottom in a first part of a combustion chamber.
  • the fuel is burned, creating flue gasses.
  • These flue gasses rise up and via the channel reach the second part of the combustion chamber.
  • the second part is provided to let in a second air stream which is injected via spray heads into the flue gasses leaving the first part.
  • the addition of the second air stream allows post-combustion of at least part of the flue gasses.
  • the object of the invention is to realise a stove which is provided to post-combust the flue gasses such that the flue gasses leaving the stove contain a smaller quantity of unburned particles.
  • a stove according to the invention is therefore characterised in that the first and second parts pass into each other and that said dome comprises a multiplicity of openings provided to allow said second air stream to flow into the second part so that on mixing of the second air stream with at least part of the flue gasses, turbulence occurs.
  • the flue gasses that are formed in the first part rise to the second part. Because the first and second parts transform into each other, the flue gasses enter the dome at the speed with which they were generated. Because the flue gasses, on rising, collide with the dome and rebound, the forward flow of the flue gasses is interrupted. This rebound also extends the duration of the flue gasses in the combustion chamber.
  • the dome is furthermore fitted with openings through which a second air stream can flow into the second part.
  • the second air stream flows into the dome and mixes with the flue gasses.
  • the second air stream also collides with the flue gasses, whereby the forward flow is disrupted more and turbulence occurs.
  • This turbulence which occurs in the flue gasses greatly improves the mixing of the second air stream and the flue gasses.
  • DE 199 11 998 due to the presence of the flame plate forming the separation between the first and second parts, the second part forms as if to say a hearth and not a space where adequate post-combustion can occur.
  • US 4 903 616 describes a dome with a multiplicity of openings. However in the latter document the second air stream is directed into the flame and not into the flue gasses.
  • a combination of DE 199 11 998 and US 4 903 616 does not lead to the present invention as this would lead to the openings being made in the flame plate, whereby mixing occurs not in the second but in the first part, and hence can lead to extinguishing of the flame.
  • the dome is formed by a first and second plate, where the first plate forms an inner wall of the second part and is fitted with the said openings, and between the first and second plate is formed a space forming an air chamber provided to build up said second air stream so that this can flow through said openings into said second part.
  • the assembly of this first and second plate offers a way of constructing a reservoir for the second air stream and distributing this over the openings. Allowing the second air stream to flow between the two plates has the secondary advantage that, because the first plate forms an inner wall of the second part and hence forms a wall of the combustion chamber, this air stream is preheated before it flows in through the openings of the combustion chamber. As a result the kinetic energy of this second air stream increases, resulting in better mixing. Consequently, after mixing with the flue gasses, it is easier to reach the optimum combustion temperature.
  • the stove is provided to allow said second air stream to flow while in contact with the first part so that this is preheated, and the stove is provided for the first and second air stream to enter the stove through the same air opening.
  • Figure 1 shows a stove with a combustion chamber 1 comprising a first part 2 and a second part 3.
  • the fuel preferably wood
  • This combustion takes place under the supply of a first air stream 4 which flows into the combustion chamber 1 at a bottom of the first part 2.
  • a first air stream 4 which flows into the combustion chamber 1 at a bottom of the first part 2.
  • flue gasses are generated, which rise and enter the second part 3.
  • the first and second parts pass into each other, more particularly at the height of the transition from the first to the second part there is no partition wall or similar, whereby the flue gasses can flow unhindered from the first to the second part.
  • the second part 3 is delimited at a top by a dome which preferably comprises a first plate 5 and a second plate 6.
  • the dome functions as a flame plate in the stove.
  • the first plate 5 forms an inner wall of the combustion chamber 1.
  • the first plate 5 and second plate 6 are joined together such that between the first plate 5 and the second plate 6 is formed an air chamber 7.
  • the first plate 5 is furthermore provided with a multiplicity of openings 8 through which a second air stream can flow into the combustion chamber 1.
  • the function of the air chamber 7 is to build up the second air stream so that this can flow through the openings 8 into the second part 3.
  • the openings are spread over the complete surface of the first plate 5 as shown in figure 2 .
  • the supply of the second air stream can be distributed evenly in the second part 3.
  • the dome preferably has a passage opening 9 through which at least part of the flue gasses can escape to the outside.
  • This passage opening 9 preferably has a valve system so that the flow of escaping flue gasses can be regulated.
  • the stove has a channel 10 which runs in contact with an inner wall of the first part 2.
  • This channel 10 allows the second air stream to flow from the underside of the stove up into the air chamber 7.
  • the channel 10 has a control member to control the flow rate of the second air stream. More preferably this control member is designed to regulate the flow rate of the second air stream as a function of the temperature predominating in the stove.
  • the stove is provided at the bottom with a suction opening 11 to allow both the first and second air streams to flow into the stove.
  • the stove is furthermore preferably provided with openings in the upstanding walls of the first part 2, preferably in the rear wall of the first part 2, so that a third air stream 12 can flow through these openings.
  • a third air stream 12 can flow through these openings.
  • the third air stream also flows into the stove via the suction opening 11.
  • a stove as described above and as shown in figures 1 and 2 has the following advantages:
  • the dome is preferably formed from a first plate 5 and a second plate 6 between which the second air stream can be built up, and wherein the first plate 5 is provided with openings 8 to allow the passage of this second air stream.
  • the advantage of this is that the second air stream can flow approximately evenly through the openings 8 at various points on the first plate 5 because this air stream can be built up in a chamber between the two plates.
  • a further advantage is that the quantity of openings 8 in the first plate 5 has no effect on the construction manner of the dome. Because of the two plates, with the air chamber 7 in between, the second air stream can flow through the openings 8 in the first plate 5 approximately evenly.
  • the flue gasses collide with the dome wall and rebound, which disrupts the upward flow. Because the wall has a dome shape and the flue gasses initially rise, the flue gasses rebound in the direction of a focal point or centre point of the dome. As a result the complete dome is filled with flue gasses.
  • the collisions are reinforced further because a second air stream flows out of the dome and also collides with the flue gasses.
  • the second air stream flows out of openings 8 which are preferably distributed over the dome, whereby the flow direction of the second air stream from the various openings 8 is different and lies in the direction of the focal point or centre point of the dome.
  • the second air stream provides fresh air, allowing post-combustion of the flue gasses.
  • the turbulence which occurs firstly ensures good mixing, leading to optimum post-combustion, but secondly also the duration of the mixture in the second part 3 is extended. Due to the longer post-combustion time, more unburned particles in the flue gasses have the chance to burn and fewer such particles are present in the flue gasses leaving the stove, meaning that the flue gasses are cleaner.
  • the advantage is that the second air stream is preheated. As a result the second air stream, as it flows through the openings 8, is warmer than if it had not been preheated. Because the second air stream is warmer, in the second part 3 after mixing with the flue gasses, the optimum combustion temperature is reached more quickly. As a result post-combustion can start earlier and hence it lasts longer. More unburned particles in the flue gasses can then be post-combusted.
  • a second advantage is that on heating, the kinetic energy and hence the movement energy of the second air stream is increased, so mixing of the second air stream and flue gasses takes place more quickly.
  • the control member in the channel 10 allows the flow rate of the second air stream to be regulated.
  • the optimum flow rate of the second air stream can be set via the control member depending on the temperature predominating in the stove, in order to allow optimum post-combustion. If the temperature in the stove is relatively low, the control member remains almost closed. If there is a sufficiently high temperature in the stove, the control member will adjust so that sufficient second air stream can flow into the stove to allow post-combustion.
  • a second advantage is that this control member can also serve as a non-return valve. This is necessary if the temperature in the stove is not sufficiently high to generate the natural draught of the second air stream. The non-return valve prevents the flue gasses flowing back towards the outside through an inlet for the second air stream.
  • a third air stream 12 enters the stove and ensures that during combustion of the fuel, preferably wood, the combustion process receives an extra quantity of fresh air to allow primary combustion to occur.
  • the dome has a passage opening 9 allows part of the flue gasses to flow out. In this way it is possible to create an equilibrium in the stove between the quantity of incoming air, which is a combination of the first, second and third air streams, and the quantity of escaping flue gasses. Because this passage opening 9 has a valve system, it is not only possible to create an equilibrium but it is also possible to influence this equilibrium. Thus by opening the valve system further, more flue gasses can leave the stove whereby the total air stream into the stove becomes greater.
  • the valve system is preferably set such that the combustion time of the flue gasses is sufficiently long.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)
EP09158873A 2008-04-25 2009-04-27 Poêle Withdrawn EP2116773A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2008/0246A BE1018109A5 (nl) 2008-04-25 2008-04-25 Koepelvormige vlamplaat.

Publications (1)

Publication Number Publication Date
EP2116773A1 true EP2116773A1 (fr) 2009-11-11

Family

ID=40280708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09158873A Withdrawn EP2116773A1 (fr) 2008-04-25 2009-04-27 Poêle

Country Status (2)

Country Link
EP (1) EP2116773A1 (fr)
BE (1) BE1018109A5 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2236940A1 (fr) * 2009-04-01 2010-10-06 Michael Stephen Thomas Poêle à combustible solide
FR2952998A1 (fr) * 2009-11-25 2011-05-27 Flam N Co Foyer ferme de cheminee perfectionne
GB2503462A (en) * 2012-06-27 2014-01-01 Hunter Stoves Ltd A solid fuel stove having secondary air outlet areas at the front and rear of the firebox
JP2014020573A (ja) * 2012-07-12 2014-02-03 Okamoto Co Ltd 薪ストーブ
EP2905540A1 (fr) * 2014-02-10 2015-08-12 Bullerjan GmbH Cheminée
BE1022253B1 (nl) * 2014-01-22 2016-03-04 Ifire Bvba Inbouwhaard
EP4215820A1 (fr) * 2022-01-20 2023-07-26 Jide Dispositif de chauffage avec alimentation en air secondaire

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US658696A (en) * 1900-01-18 1900-09-25 Franz Christopf Bormann Continuous-combustion stove.
US1199656A (en) * 1914-05-15 1916-09-26 Albert Henry Clay Beatty Smoke-consumer.
US4502395A (en) * 1982-08-31 1985-03-05 Condar Co. Combustion gas mixing apparatus
US4903616A (en) 1986-05-12 1990-02-27 Konstantin Mavroudis Device for supply of secondary air, and boiler with the device
US5702244A (en) * 1994-06-15 1997-12-30 Thermal Energy Systems, Incorporated Apparatus and method for reducing particulate emissions from combustion processes
DE19911998A1 (de) 1999-03-17 2000-09-28 Cera Design By Britta Von Tasc Ofen, insbesondere Kamin
GB2389414A (en) * 2002-06-06 2003-12-10 A J Wells & Sons Single control mechanism for synchronously controlling the movement of dampers over a plurality of air inlets in a stove
FR2887016A1 (fr) * 2005-06-09 2006-12-15 Cheminees Seguin Duteriez Soc Deflecteur de fumees pour foyer ferme

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US658696A (en) * 1900-01-18 1900-09-25 Franz Christopf Bormann Continuous-combustion stove.
US1199656A (en) * 1914-05-15 1916-09-26 Albert Henry Clay Beatty Smoke-consumer.
US4502395A (en) * 1982-08-31 1985-03-05 Condar Co. Combustion gas mixing apparatus
US4903616A (en) 1986-05-12 1990-02-27 Konstantin Mavroudis Device for supply of secondary air, and boiler with the device
US5702244A (en) * 1994-06-15 1997-12-30 Thermal Energy Systems, Incorporated Apparatus and method for reducing particulate emissions from combustion processes
DE19911998A1 (de) 1999-03-17 2000-09-28 Cera Design By Britta Von Tasc Ofen, insbesondere Kamin
GB2389414A (en) * 2002-06-06 2003-12-10 A J Wells & Sons Single control mechanism for synchronously controlling the movement of dampers over a plurality of air inlets in a stove
FR2887016A1 (fr) * 2005-06-09 2006-12-15 Cheminees Seguin Duteriez Soc Deflecteur de fumees pour foyer ferme

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2236940A1 (fr) * 2009-04-01 2010-10-06 Michael Stephen Thomas Poêle à combustible solide
FR2952998A1 (fr) * 2009-11-25 2011-05-27 Flam N Co Foyer ferme de cheminee perfectionne
GB2503462A (en) * 2012-06-27 2014-01-01 Hunter Stoves Ltd A solid fuel stove having secondary air outlet areas at the front and rear of the firebox
EP2679908A3 (fr) * 2012-06-27 2014-08-20 Hunter Stoves Limited Fourneau avec une circulation d'air supplémentaire
GB2503462B (en) * 2012-06-27 2016-10-12 Hunter Stoves Ltd Stove with additional air flow
JP2014020573A (ja) * 2012-07-12 2014-02-03 Okamoto Co Ltd 薪ストーブ
BE1022253B1 (nl) * 2014-01-22 2016-03-04 Ifire Bvba Inbouwhaard
EP2905540A1 (fr) * 2014-02-10 2015-08-12 Bullerjan GmbH Cheminée
EP4215820A1 (fr) * 2022-01-20 2023-07-26 Jide Dispositif de chauffage avec alimentation en air secondaire
BE1030215B1 (fr) * 2022-01-20 2023-08-28 Jide Dispositif de chauffage avec alimentation en air secondaire

Also Published As

Publication number Publication date
BE1018109A5 (nl) 2010-05-04

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