EP1363070B1 - Brûleur à vaporisation et procédé pour enlever des dépôts dans un brûleur à vaporisation - Google Patents

Brûleur à vaporisation et procédé pour enlever des dépôts dans un brûleur à vaporisation Download PDF

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Publication number
EP1363070B1
EP1363070B1 EP20030005259 EP03005259A EP1363070B1 EP 1363070 B1 EP1363070 B1 EP 1363070B1 EP 20030005259 EP20030005259 EP 20030005259 EP 03005259 A EP03005259 A EP 03005259A EP 1363070 B1 EP1363070 B1 EP 1363070B1
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EP
European Patent Office
Prior art keywords
porous medium
combustion chamber
ignition
fuel
combustion
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 - Fee Related
Application number
EP20030005259
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German (de)
English (en)
Other versions
EP1363070A1 (fr
Inventor
Thomas Bauer
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
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Filing date
Publication date
Application filed by J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP1363070A1 publication Critical patent/EP1363070A1/fr
Application granted granted Critical
Publication of EP1363070B1 publication Critical patent/EP1363070B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F23C99/006—Flameless combustion stabilised within a bed of porous heat-resistant material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D3/00—Burners using capillary action
    • F23D3/40—Burners using capillary action the capillary action taking place in one or more rigid porous bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/06—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners
    • F23Q7/08—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners for evaporating and igniting liquid fuel, e.g. in hurricane lanterns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2207/00—Ignition devices associated with burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications

Definitions

  • the present invention relates to an evaporator burner, in particular for a vehicle heater, which has a combustion chamber formed in a combustion chamber, in which via a first porous medium fuel is fed, according to the preamble of claim 1 and a method for removing deposits on an evaporator burner.
  • evaporator burners are generally constructed in such a way that, to start the combustion process, an ignition element protruding into the combustion chamber is provided, which generates correspondingly high temperatures by electrical excitation in its surroundings.
  • the fuel introduced into the combustion chamber via the first porous medium in the region near this ignition element and also vaporized there, provides an ignitable mixture which is initially ignited in the vicinity of the ignition element by the high temperatures prevailing there.
  • the combustion then generally spreads like a ring over the entire combustion chamber. If the combustion has then spread over the entire combustion chamber, the ignition device can be deactivated, since the combustion heat at the same time also provides sufficient energy to evaporate the fuel supplied via the porous fuel.
  • a disadvantage of such evaporator burners is the comparatively slow start procedure, as essential areas of the combustion chamber must be heated by the ignition, in order to generate the temperatures required for ignition can. This disadvantage could be compensated by a correspondingly high annealing power, which however increases the power consumption of the device.
  • Another disadvantage is that before and also after the operation of the evaporator burner, ie before the occurrence of the ignition and after the completion of the combustion, by the still prevailing high temperatures, a fuel outgassing can take place, which due to the combustion no longer exists in this state leads to a high exhaust emission and also can cause an inhomogeneous combustion, especially in the ignition process.
  • a generic, so constructed according to the preamble of claim 1 evaporator burner is from the US 6 027 334 A known.
  • a firing chamber arranged essentially tangentially relative to a combustion chamber opens into a circumferential wall of the combustion chamber housing.
  • an ignition element is arranged, which is surrounded by a porous medium.
  • liquid fuel is fed.
  • the DE 100 04 507 A1 discloses a vehicle heater, wherein in a nozzle receiving a Zündorgan acting as a porous medium screen element surrounding the ignition device is arranged.
  • This screen element has at least partially a circumferential distance to a nozzle inner wall.
  • the DE 195 07 556 A1 discloses an evaporator burner in which a substantially cup-shaped combustion chamber housing is lined on the inside of a peripheral wall with porous evaporator medium. In this peripheral wall opens to the combustion chamber substantially tangentially arranged approach, in which an ignition element is supported.
  • an evaporator burner in particular for a vehicle heater, comprising a combustion chamber formed in a combustion chamber, in which fuel is fed via a first porous medium, further comprising an ignition chamber open to the combustion chamber, in which fuel via a second porous medium is fed and in which an ignition is substantially completely absorbed.
  • the ignition device is no longer used to heat areas of the combustion chamber to provide the temperatures required for igniting an ignitable mixture, but in a separate, provided for this purpose Ignition chamber is effective, so that initially in this ignition chamber, the combustion will occur and then from the ignition chamber, the combustion will then spread into the combustion chamber, which communicates with the ignition chamber, will propagate.
  • the concentration of the heat energy provided for ignition is achieved in a relatively small volume range, especially with the result that the ignition process is much faster and thus the period in which an excessive exhaust emission occurs during the start phase, can be significantly reduced. As a result, the risk of deposits is significantly reduced.
  • a heater is associated with the second porous medium.
  • this heating device it is thus possible, in addition to the heat energy provided by the ignition device, to ensure that the fuel introduced into the second porous medium also evaporates better.
  • the heat energy provided by the ignition element can essentially be used to generate the temperatures required for ignition be used in its environment, while the heat of evaporation is provided by the heater.
  • the heating device is arranged surrounding the second porous medium on its side facing away from the ignition element.
  • the ignition chamber is formed in an ignition chamber housing connected to the combustion chamber housing.
  • the Zündschgeophuse is constructed of thermally insulating material and / or is connected to the combustion chamber housing in a thermally insulating manner.
  • the Zündschgeophuse be constructed of ceramic material.
  • the second porous medium, the ignition element is disposed at least in its thermally effective area while maintaining a gap.
  • the fuel can be introduced into the second porous medium via a fuel feed line.
  • the liquid medium is then preferably supplied to the first porous medium through the intermediary of the second porous medium.
  • At least one ignition air inlet opening can lead into the ignition chamber.
  • the combustion air required for the main combustion which takes place in the combustion chamber can then be supplied via a combustion air introduction arrangement arranged in a central region of the combustion chamber.
  • the object is achieved by a method for removing deposits on a generic or inventive evaporator burner, in which method after completion of a normal burner operation in the ignition chamber under fuel deficit in the combustion chamber propagating and deposits on the first porous medium burning off combustion is induced.
  • This procedure ensures that the combustion, which initially takes place under a fuel deficit, that is to say in the case of a lean mixture of vaporized fuel and combustion air, burns off, for example, soot-like deposits present in the region of the inner surface of the first porous medium.
  • the combustion during this cleaning or burning off process is preferably carried out at a lambda value of at least 2.
  • deposits are burnt off in the region of the second porous medium after completion of combustion of deposits on the first porous medium by termination of the fuel supply and excitation of the ignition element and the heating device.
  • an inventive evaporator burner is generally designated 10.
  • the evaporator burner 10 comprises a flame tube 12 which forms in a axial end region 15 a combustion chamber housing 14 for a combustion chamber 16 formed in the interior of the flame tube 12.
  • the inner wall of this combustion chamber 16 is lined with a porous medium 18, which may be formed, for example, of felt-like, braid-like or other pore-containing material, such as Schaumkermaik o. The like.
  • Combustion air is introduced into the combustion chamber 16 via a blower arrangement 20 shown only schematically and a combustion air inlet pipe 22 which is centrally arranged in the combustion chamber 16 and has a plurality of air inlet slots 24 at its peripheral area.
  • the axial end of the combustion chamber 16 essentially forms an annular flame trap 26, through which the combustion exhaust gases and the flame can extend into the remaining region of the flame tube 12.
  • a Zündschgepatuse 28 is attached laterally.
  • This approximately cylindrical Zündschgepatuse 28 can with the combustion chamber housing 14 and the end portion 15 of the flame tube 12th be provided with an intermediate storage of a heat and fuel resistant and preferably formed from thermally insulating material O-ring-like sealing element 30, so that in the transition region between the combustion chamber housing 14 and the Zündwaitgephaseuse 28 ensures good thermal insulation.
  • the Zündschbach for reasons described below, the Zündhuntgepatuse 28 of thermally insulating material, such as ceramic material, formed.
  • a generally designated 32 ignition chamber is formed, which is open in a junction region 34 to the combustion chamber 16 out.
  • this junction region 34 can also be partially provided by the material or wall region of the combustion chamber housing 14 adjoining the ignition chamber housing 28.
  • the porous medium 36 extends into the region of an annular fuel distribution groove 38 formed on the inside of the ignition chamber housing 28 into which a fuel supply line 40 opens.
  • the evaporator burner 10 can very quickly boil up to its rated power, so that the harmful emissions occurring in this run-up phase can be significantly reduced. It is also essential that the additional provision of the heating coil 54 in coordination with the respective fuel used in an optimal manner, the evaporation in the ignition chamber 32 can be promoted, without that for the provision of the ignition temperatures actually provided Glühzündit 46 excessively heat are withdrawn would.
  • the present embodiment of a heating burner it is thus possible to operate this at startup such that the startup to rated power only takes a very short time, whereby on the one hand electrical energy is saved, on the other hand, the harmful emissions occurring in this phase can be significantly reduced.
  • the organs which are effective for ignition can be completely deactivated. Due to the main combustion taking place in the heating burner, sufficient heat energy is provided for evaporating and burning the fuel supplied via the porous medium to the combustion chamber.
  • the shape and the positioning of the flame guide element 56 as in the above-described cleaning process, a significant influence on the propagation of the pilot flame can be taken in the Brennkamer so that depending on the required flame distribution here according to the shape or the positioning of the element 56 can be adjusted.

Claims (15)

  1. Brûleur à vaporisation, plus particulièrement pour un appareil de chauffage d'un véhicule, comportant une chambre de combustion (16) formée dans un boîtier de chambre à combustion (14), dans laquelle du combustible est introduit par le biais d'un premier milieu poreux (18), comportant en outre une chambre d'allumage (32) ouverte sur la chambre de combustion (16), dans laquelle le combustible est introduit par le biais d'un deuxième milieu poreux (36) et dans laquelle un organe d'allumage (46) est reçu essentiellement en entier,
    caractérisé par un dispositif de chauffage (54) associé au deuxième milieu poreux (36).
  2. Brûleur à vaporisation selon la revendication 1,
    caractérisé en ce que la chambre d'allumage (32) est formée dans un boîtier de chambre d'allumage (28) relié au boîtier de chambre de combustion (14).
  3. Brûleur à vaporisation selon la revendication 2,
    caractérisé en ce que le boîtier de chambre d'allumage (28) est conçu dans un matériau à isolation thermique ou/et est reliée au boîtier de chambre de combustion (14) de façon à être isolée thermiquement.
  4. Brûleur à vaporisation selon la revendication 3,
    caractérisé en ce que le boîtier de chambre d'allumage (28) est conçu en matériau céramique.
  5. Brûleur à vaporisation selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que le deuxième milieu poreux (36) est disposé de façon à entourer l'organe d'allumage (46) au moins dans la zone à effet thermique en conservant un intervalle (52).
  6. Brûleur à vaporisation selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que le dispositif de chauffage (54) est disposé de façon à entourer le deuxième milieu poreux (36) du côté opposé à l'organe d'allumage (46).
  7. Brûleur à vaporisation selon l'une quelconque des revendications 1 à 6,
    caractérisé par un canal d'alimentation en combustible (40) destiné à introduire du combustible liquide dans le deuxième milieu poreux (36).
  8. Brûleur à vaporisation selon la revendication 7,
    caractérisé en ce que du combustible liquide est introduit dans le premier milieu poreux (18) par le biais du deuxième milieu poreux (36).
  9. Brûleur à vaporisation selon l'une quelconque des revendications 1 à 8,
    caractérisé par au moins un orifice d'admission d'air (42, 44) menant dans la chambre d'allumage (32).
  10. Brûleur à vaporisation selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce qu'un agencement d'admission d'air de combustion (22, 24) est disposé dans une zone centrale (16) de la chambre de combustion.
  11. Brûleur à vaporisation selon l'une quelconque des revendications 1 à 10,
    caractérisé par un élément de déviation de la flamme d'allumage (56) dans la zone de jonction (34) de la chambre d'allumage (32) dans la chambre de combustion (16).
  12. Procédé pour enlever des dépôts dans un brûleur à vaporisation, plus particulièrement pour un appareil de chauffage d'un véhicule, comprenant une chambre de combustion (16) formée dans un boîtier de chambre de combustion (14), dans laquelle du combustible est introduit par le biais d'un premier milieu poreux (18), laquelle comprend en outre une chambre d'allumage (32) ouverte sur la chambre de combustion (16), dans laquelle du combustible est introduit par le biais d'un deuxième milieu poreux (36) et dans laquelle un organe d'allumage (46) est reçu essentiellement en entier, plus particulièrement selon l'une quelconque des revendications précédentes, selon lequel procédé une combustion étendue dans la chambre de combustion (16) et brûlant les dépôts du premier milieu poreux (18) est induite après la fin d'une combustion normale dans la chambre d'allumage (32) en cas de manque de combustible.
  13. Procédé selon la revendication 12,
    caractérisé en ce que la totalité du combustible introduit dans le deuxième milieu poreux (36) est vaporisée dans la chambre d'allumage (32) grâce à l'excitation simultanée de l'organe d'allumage (46) et du dispositif de chauffage (54).
  14. Procédé selon la revendication 12 ou 13,
    caractérisé en ce que la combustion a lieu à une valeur lambda d'au moins 2.
  15. Procédé selon l'une quelconque des revendications 12 à 14,
    caractérisé en ce que les dépôts sont brûlés dans la zone du deuxième milieu poreux (36) après la réussite de la combustion des dépôts au niveau du premier milieu poreux (18) une fois l'introduction de combustible et l'excitation de l'organe d'allumage (46) et du dispositif de chauffage (54) terminées.
EP20030005259 2002-05-02 2003-03-10 Brûleur à vaporisation et procédé pour enlever des dépôts dans un brûleur à vaporisation Expired - Fee Related EP1363070B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10219633 2002-05-02
DE2002119633 DE10219633C1 (de) 2002-05-02 2002-05-02 Verdampferbrenner

Publications (2)

Publication Number Publication Date
EP1363070A1 EP1363070A1 (fr) 2003-11-19
EP1363070B1 true EP1363070B1 (fr) 2008-06-18

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ID=29264998

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EP20030005259 Expired - Fee Related EP1363070B1 (fr) 2002-05-02 2003-03-10 Brûleur à vaporisation et procédé pour enlever des dépôts dans un brûleur à vaporisation

Country Status (2)

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EP (1) EP1363070B1 (fr)
DE (2) DE10219633C1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004005267A1 (de) * 2004-02-03 2005-08-25 J. Eberspächer GmbH & Co. KG Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät
DE102005004358A1 (de) * 2005-01-31 2006-08-03 J. Eberspächer GmbH & Co. KG Brennkammerbaugruppe für ein Fahrzeugheizgerät
DE102005020148A1 (de) * 2005-04-29 2006-11-09 J. Eberspächer GmbH & Co. KG Verdampferanordnung, insbesondere für ein Fahrzeugheizgerät oder einen Reformer
DE102005055642A1 (de) 2005-11-22 2007-05-24 J. Eberspächer GmbH & Co. KG Brennkammerbaugruppe für einen Verdampferbrenner
DE102007030606A1 (de) * 2007-07-02 2009-01-08 J. Eberspächer GmbH & Co. KG Fahrzeugheizgerät
DE102007036637A1 (de) * 2007-08-03 2009-02-05 J. Eberspächer GmbH & Co. KG Zündlufteinlassanordnung für eine Brennkammerbaugruppe eines brennstoffbetriebenen Heizgerätes, insbesondere Fahrzeugheizgerät
DE102007061518A1 (de) * 2007-12-20 2009-06-25 J. Eberspächer GmbH & Co. KG Brennkammerbaugruppe für einen Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät
DE102014103812A1 (de) 2014-03-20 2015-09-24 Webasto SE Verdampferbrenner für ein mobiles, mit flüssigem Brennstoff betriebenes Heizgerät
DE102014103815B4 (de) 2014-03-20 2018-07-19 Webasto SE Verdampferbrenner
DE102014103817B4 (de) 2014-03-20 2018-07-19 Webasto SE Verdampferbrenner für ein mobiles, mit flüssigem Brennstoff betriebenes Heizgerät
DE102014103814B4 (de) * 2014-03-20 2022-01-05 Webasto SE Mobiles, mit flüssigem Brennstoff betriebenes Heizgerät
DE102014103813A1 (de) 2014-03-20 2015-09-24 Webasto SE Verdampferbrenneranordnung für ein mobiles, mit flüssigem Brennstoff betriebenes Heizgerät
RU2626870C1 (ru) * 2016-09-20 2017-08-02 Евсей Аврумович Кордит Устройство для зажигания и подачи топлива в горелочное устройство испарительного типа

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3243395C2 (de) * 1982-11-24 1985-07-25 Danfoss A/S, Nordborg Verdampfungsbrenner für flüssigen Brennstoff
JPS61134523A (ja) * 1984-12-04 1986-06-21 Matsushita Electric Ind Co Ltd 液体燃料燃焼器の点火装置
US4623310A (en) * 1985-04-24 1986-11-18 Mikuni Kogyo Kabushiki Kaisha Vaporized liquid fuel combustion apparatus
DE19507556B4 (de) * 1994-10-20 2004-12-30 J. Eberspächer GmbH & Co. KG Verfahren zum Starten eines Brenners für ein Fahrzeugheizgerät oder einen Partikelfilter-Regenerator
DE19529994C2 (de) * 1994-11-10 2003-06-26 Eberspaecher J Gmbh & Co Verdampferbrenner für ein Heizgerät
DE4443865C2 (de) * 1994-12-09 1999-01-14 Eberspaecher J Gmbh & Co Glühzündeinrichtung eines Verdampfungsbrenners
DE10004507A1 (de) * 2000-02-02 2001-08-09 Eberspaecher J Gmbh & Co Heizgerät, insbesondere motorunabhängige Fahrzeugheizung

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Publication number Publication date
DE10219633C1 (de) 2003-12-04
DE50309994D1 (de) 2008-07-31
EP1363070A1 (fr) 2003-11-19

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