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Publication number
EP3865776A1
EP3865776A1 EP21156106.3A EP21156106A EP3865776A1 EP 3865776 A1 EP3865776 A1 EP 3865776A1 EP 21156106 A EP21156106 A EP 21156106A EP 3865776 A1 EP3865776 A1 EP 3865776A1
Authority
EP
European Patent Office
Prior art keywords
brazier
upper opening
plenum
blade
ports
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.)
Pending
Application number
EP21156106.3A
Other languages
German (de)
English (en)
Inventor
Mario CAMILOT
Luigi Gasparollo
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.)
Mcz Group SpA
Original Assignee
Mcz Group SpA
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 Mcz Group SpA filed Critical Mcz Group SpA
Publication of EP3865776A1 publication Critical patent/EP3865776A1/fr
Pending 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
    • 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
    • F24B1/00—Stoves or ranges
    • F24B1/02—Closed stoves
    • F24B1/024—Closed stoves for pulverulent fuels

Definitions

  • the present invention relates to a brazier, usable for example in a pellet-fueled stove.
  • Heating apparatuses such as in particular stoves or boilers, are currently known which can be supplied with solid fuel, for example wood or pellets, and are used extensively to heat air and/or water of dwelling spaces.
  • solid fuel for example wood or pellets
  • These apparatuses of the known type usually comprise a containment structure which accommodates respectively a combustion chamber, an electric lighter, a storage tank for the solid fuel, means for moving the fuel in the combustion chamber, a first pumping means or fan, for moving the combustion air by propulsion or suction, an air-to-air heat exchanger and a second pumping means or fan for the forced exchange of heat and the conveyance of warm air into the domestic environment.
  • the combustion chamber usually accommodates a brazier inside which the fuel is deposited by means of adapted devices usually of the screw feeder type.
  • first pumping means such as for example a first bladed fan which can be driven by an electrically powered motor, and is conveyed through an intake duct at the brazier; here, by virtue of appropriate lighting means, combustion is triggered and generates burnt gases at high temperature.
  • the gases then transit into a heat exchanger, which is usually arranged downstream of the combustion chamber, in order to exchange heat with the containment structure of the apparatus, which in turn dissipates it, by radiation and/or by natural convection, into the domestic environment of installation.
  • a heat exchanger which is usually arranged downstream of the combustion chamber, in order to exchange heat with the containment structure of the apparatus, which in turn dissipates it, by radiation and/or by natural convection, into the domestic environment of installation.
  • second pumping means such as a second fan which can be driven by an electric motor, can be provided in order to distribute heat in the outside environment in a forced convective manner, improving the thermal performance of the apparatus and allowing to heat even spaces other than the installation space.
  • the combustion gases are expelled from the apparatus through an adapted discharge duct, by virtue of the action of said first pumping means.
  • Actuation and control means such as an appropriately programmed electronic board, are generally provided to manage and coordinate the various electrical user devices provided in the apparatus in order to allow their correct operation.
  • WO 01/23808 is known, for example, which describes a solution related to a pellet-fueled brazier which comprises a brazier to the side of which a pressurized container is arranged which is provided with two outputs, one arranged above the brazier and one arranged below the brazier, for the combustion air.
  • the drawbacks of the background art substantially consist in that the means adapted to supply additional air to the brazier, in addition to the classic distribution of air through adapted lower and lateral holes of the brazier, are localized and aimed only at increasing the excess air quantity, without modifying the state of the fluid-dynamics combustion motions, for example by means of a confinement or uniform stirring.
  • pollutants are generated which are typically a secondary product of the combustion of the biomass.
  • the aim of the present invention is therefore to solve the described technical problems, eliminating the drawbacks of the cited background art and thus providing an invention that allows to achieve an alteration of the fluid-dynamics motions of the flame inside the brazier.
  • an object of the invention is to provide a brazier in which the flame remains more confined and hotter.
  • Another object is to provide a brazier in which the mentioned alteration of the fluid-dynamics motions of the flame inside the brazier allows to obtain a flame that is expanded and rendered more turbulent, in addition to being cooled by dilution.
  • Another object is to provide a brazier in which the formation of pollutants is altered substantially, reducing the formation of particulate.
  • Another object is to obtain a brazier the shape of which allows to achieve the correct containment-turbulence ratio.
  • Another object is to obtain a brazier that is structurally simple, has low manufacturing costs, and can be provided with usual known systems.
  • a brazier composed of a container provided with an upper opening and with a series of openings on the lateral faces and on the lower face, characterized in that at the region that surrounds externally said upper opening there are one or more ports adapted to distribute a blade of combustion air above said upper opening.
  • the reference numeral 1 designates a brazier, which is constituted by container 2, usually made of cast iron or refractory material adapted to withstand the temperatures, having a cylindrical, cubic or more generically parallelepiped shape, with an upper opening 3 such as to allow the pellet to deposit inside it, and a series of openings 4 on the lateral faces 5 and on the lower face 6 in order to allow the passage of air toward the inside.
  • container 2 usually made of cast iron or refractory material adapted to withstand the temperatures, having a cylindrical, cubic or more generically parallelepiped shape, with an upper opening 3 such as to allow the pellet to deposit inside it, and a series of openings 4 on the lateral faces 5 and on the lower face 6 in order to allow the passage of air toward the inside.
  • openings 4 are distributed on the brazier 1, passing completely through the thickness of its faces 5, 6, identify air intake ducts, and are appropriately shaped so that the input of air is differentiated in the various regions of the internal volume of the brazier so as to obtain the best combustion performance.
  • a plenum 8 which conveys air 9, which arrives from a duct 10, at an outlet 11, which is arranged perimetrically to said region 7 and is inclined in the direction of the upper opening 3.
  • the inclination of the outlet 11 forms an angle ⁇ (alpha) with respect to the vertical to the brazier.
  • the outlet 11 is further provided with one or more ports 12 for the emission of a blade 13 of combustion air, above the upper opening 3, toward the center of the flow of burning gases that exits from the brazier 1.
  • the one or more ports 12 can have the shape of holes, slots or slits.
  • the walls of the plenum 8 are shaped so as to extend from the volume of said plenum 8 toward the outside and create a duct or outlet 11 which surrounds the ports 12, so as to direct their flow in a very precise direction.
  • the flow of the air blade 13 in output from the plenum 8 through the ports 12 is conveyed in a precise direction not only by the outlet 11 but also, as an alternative, by additional components applied to the sides of the plenum 8, such as metal plates, or even solid walls made of metal or other refractory material that is resistant to high temperatures.
  • the direction of the flow of the air blade 13 is oriented with respect to the direction identified by the axis of the brazier with an angle ⁇ comprised between 20° and 160°.
  • the angle ⁇ is comprised between 45° and 135°, with a tolerance of +/- 5°.
  • the plenum 8 can be fed by an adapted fan which supplies the duct 10 and is separate from an additional fan for the standard pumping of the air.
  • the invention has achieved the intended aim and objects, obtaining a brazier in which the supply of additional combustible air, constituted by the blade 13, independently of the air that passes through the openings 4 on the lateral face 5 and lower face 6 of the brazier 1, alters the emission of pollutants that are the result of the combustion, reducing their quantity.
  • a further advantage is provided by the fact that the flame that exits from the brazier is influenced in its orientation and length, with an effect on its aesthetic shape.
  • the air blade 13 that surrounds the entire brazier causes the formation of a sort of virtual air chamber with a more or less partial containment of the actual combustion that occurs on the pellet pieces that lie in the brazier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Inorganic Insulating Materials (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
EP21156106.3A 2020-02-17 2021-02-09 Âtre Pending EP3865776A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000003050A IT202000003050A1 (it) 2020-02-17 2020-02-17 Braciere

Publications (1)

Publication Number Publication Date
EP3865776A1 true EP3865776A1 (fr) 2021-08-18

Family

ID=70738834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21156106.3A Pending EP3865776A1 (fr) 2020-02-17 2021-02-09 Âtre

Country Status (2)

Country Link
EP (1) EP3865776A1 (fr)
IT (1) IT202000003050A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1182676A (fr) * 1957-09-12 1959-06-26 Commerciale Antares Soc Dispositif de distribution d'air secondaire dans tous foyers à source de chaleur par combustibles liquides ou solides
DE3009251A1 (de) * 1980-03-11 1981-09-17 Theo 6349 Sinn Anschütz Zimmerofen aus stahlblechen fuer feste brennstoffe
US5383446A (en) * 1991-08-14 1995-01-24 Pyro Industries, Inc. Self concentrating combustion grate for pellet fueled stoves
WO2001023808A1 (fr) 1999-09-27 2001-04-05 Buckner Carrol E Dispositif permettant de bruler un combustible sous forme de pastilles
DE202006007860U1 (de) * 2006-05-15 2006-09-21 Paul Künzel GmbH & Co. Brennofen für feste Brennstoffe
EP2447610A1 (fr) * 2010-10-25 2012-05-02 DPU Profirenovierer Unternehmergesellschaft (haftungsbeschränkt) Utilisation de carburant dans des fours de cheminées et de poêles en faïence, des cheminées de chauffage, des foyers encastrables et cartouches d'allumage
EP2618062A2 (fr) * 2012-01-23 2013-07-24 Alois Wegscheider Petit foyer
GB2501875A (en) * 2012-05-08 2013-11-13 Stephen William John Grant A Granulated Fuel Burner Assembly with a Movable Flame Tube to Clear Debris from the Combustion Chamber
EP3492814A1 (fr) * 2017-12-04 2019-06-05 Aico S.p.A. Poêle à biomasse à émissions réduites

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1182676A (fr) * 1957-09-12 1959-06-26 Commerciale Antares Soc Dispositif de distribution d'air secondaire dans tous foyers à source de chaleur par combustibles liquides ou solides
DE3009251A1 (de) * 1980-03-11 1981-09-17 Theo 6349 Sinn Anschütz Zimmerofen aus stahlblechen fuer feste brennstoffe
US5383446A (en) * 1991-08-14 1995-01-24 Pyro Industries, Inc. Self concentrating combustion grate for pellet fueled stoves
WO2001023808A1 (fr) 1999-09-27 2001-04-05 Buckner Carrol E Dispositif permettant de bruler un combustible sous forme de pastilles
DE202006007860U1 (de) * 2006-05-15 2006-09-21 Paul Künzel GmbH & Co. Brennofen für feste Brennstoffe
EP2447610A1 (fr) * 2010-10-25 2012-05-02 DPU Profirenovierer Unternehmergesellschaft (haftungsbeschränkt) Utilisation de carburant dans des fours de cheminées et de poêles en faïence, des cheminées de chauffage, des foyers encastrables et cartouches d'allumage
EP2618062A2 (fr) * 2012-01-23 2013-07-24 Alois Wegscheider Petit foyer
GB2501875A (en) * 2012-05-08 2013-11-13 Stephen William John Grant A Granulated Fuel Burner Assembly with a Movable Flame Tube to Clear Debris from the Combustion Chamber
EP3492814A1 (fr) * 2017-12-04 2019-06-05 Aico S.p.A. Poêle à biomasse à émissions réduites

Also Published As

Publication number Publication date
IT202000003050A1 (it) 2021-08-17

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