EP1342949A1 - Elément d'évaporateur d'un brûleur à vaporisation - Google Patents

Elément d'évaporateur d'un brûleur à vaporisation Download PDF

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Publication number
EP1342949A1
EP1342949A1 EP02027440A EP02027440A EP1342949A1 EP 1342949 A1 EP1342949 A1 EP 1342949A1 EP 02027440 A EP02027440 A EP 02027440A EP 02027440 A EP02027440 A EP 02027440A EP 1342949 A1 EP1342949 A1 EP 1342949A1
Authority
EP
European Patent Office
Prior art keywords
recess
evaporator
combustion chamber
ignition
wall
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Withdrawn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
EP02027440A
Other languages
German (de)
English (en)
Inventor
Michael Humburg
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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27740670&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1342949(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP1342949A1 publication Critical patent/EP1342949A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01B—BOILING; BOILING APPARATUS ; EVAPORATION; EVAPORATION APPARATUS
    • B01B1/00—Boiling; Boiling apparatus for physical or chemical purposes ; Evaporation in general
    • B01B1/005—Evaporation for physical or chemical purposes; Evaporation apparatus therefor, e.g. evaporation of liquids for gas phase reactions

Definitions

  • the present invention relates to an evaporator element for an evaporator burner, in particular for a vehicle heater.
  • evaporator burners such as those used in auxiliary heaters or auxiliary heaters in motor vehicles
  • the fuel is fed through a fuel line and into an evaporator element positioned on a combustion chamber wall and lining the combustion chamber at least in some areas.
  • This evaporator element is designed to distribute the fuel fed into this by capillary action and possibly also under the prevailing fuel pressure and to convey it in the direction of its surface facing the combustion chamber.
  • FIG. 8a combustion chamber housing 10a can be seen here, which surrounds a combustion chamber 12a formed therein with a combustion chamber outer wall 14a and a combustion chamber bottom wall 16a.
  • an ignition element 20a in the form of a glow ignition pin penetrates the outer wall 14a of the combustion chamber and, with its region 22a effective for generating the ignition temperature, lies within the combustion chamber 12a and at a short distance from the flat evaporator element 18a. This results in the situation indicated schematically in FIG. 7, in which the ignition element 20a, with its region 22a effective for generating the ignition temperatures, lies at a short distance a from the essentially flat surface of the evaporator element 18a.
  • the ignition element which is essentially intended to provide the temperatures required for ignition and to ensure that fuel evaporates increasingly from the evaporator element 18a in order to produce an ignitable mixture, transfers the thermal energy to the evaporator element 18a essentially in the form of radiant heat ,
  • the transferred thermal energy decreases quadratically with the distance between the ignition element 20a and the respective surface area and also decreases with the decreasing angle of incidence. As a result, a considerable part of the thermal energy provided in the ignition element 20a cannot actually be used effectively for evaporation or for ignition.
  • an evaporator element for an evaporator burner in particular for a vehicle heating device, the evaporator element being designed for positioning on a combustion chamber wall and having a recess for at least partially accommodating an ignition element such that when the ignition element is positioned so as to engage in the recess a recess wall at least partially surrounds the ignition element.
  • the evaporator element according to the invention it is ensured that it deviates from a flat surface known from the prior art Configuration surrounds the ignition element at least in certain areas, so that the disadvantageous situation shown in FIG. 7 is eliminated and both in terms of the angle of incidence and in terms of the distance between the ignition element and the surface of the evaporator element, in particular in the region of the recess wall, an improved radiation energy transfer situation is possible is created.
  • the recess is designed in such a way that its recess wall surrounds at least one area of the ignition element that is effective for generating ignition temperatures.
  • the recess wall surrounds it at least in a partial area thereof with an essentially uniform distance.
  • the heat transfer can also be improved in that the recess is designed to be elongated to match an elongated shape of the ignition element.
  • the cutout be positioned on a side facing the combustion chamber of the evaporator element is open and surrounds an ignition element which engages in this position on the side facing the combustion chamber wall with the recess wall.
  • a very efficient transfer of the radiant heat to the evaporator element can be achieved if the recess wall is in the Surrounds recess engagingly positioned ignition device in an angular range of at least 150 °.
  • the evaporator medium can be formed from porous or braid-like material. Steel mesh or other foam-like materials such as e.g. Foam ceramic, in question.
  • the evaporator element is designed essentially in the form of a circular disk or in the manner of an annular disk, and the recess is designed to extend essentially radially in the evaporator element and is open to a radial outside.
  • the present invention further relates to an evaporator burner comprising a combustion chamber housing forming a combustion chamber with a combustion chamber outer wall and a combustion chamber bottom wall, an evaporator element according to the invention being provided on one of the combustion chamber walls, preferably the combustion chamber bottom wall, and an ignition element being positioned so as to engage in the recess in the evaporator element.
  • a depression is provided in one of the combustion chamber walls, into which the evaporator element engages in its area having the recess.
  • FIGS. 1 to 3 show a combustion chamber housing 10 with an evaporator element designed according to the principles of the present invention 18 made of porous or other material that can be used for fuel delivery under capillary action.
  • a combustion chamber housing 10 which in the illustrated case provides a circular cylindrical shape for the combustion chamber 12, comprises a combustion chamber outer wall 14 and a combustion chamber bottom wall 16.
  • the evaporator element 18 is arranged on the combustion chamber bottom wall 16 on its side facing the combustion chamber 12.
  • the ignition element which in turn is in the form of a glow plug, engages with respect to a longitudinal axis L of the combustion chamber housing 10 from radially outside through an opening 24 in the outer wall 14 of the combustion chamber and extends in the radial direction into a recess 26 provided in the evaporator element 18.
  • This recess As can be seen above all in FIG. 3, 26 is open on the side of the evaporator element 18 facing the combustion chamber 12 and has a partially circular shape in cross section. The depth of the recess 26 is dimensioned such that the ignition element 20 engaging in it essentially completely engages in the recess 26 in the direction of the longitudinal axis L.
  • the recess 26 is open to enable the ignition element 22 to engage radially therein.
  • the recess 26 is also elongated.
  • the recess 26 with an elongated shape is likewise rounded in its end region 28 in accordance with the shape of the ignition element 20.
  • the evaporator element 18 Since the evaporator element 18 is formed from a material whose thickness is smaller than the thickness of the ignition element 20, the evaporator element 18 in its area forming the recess 26 has a bulge which essentially corresponds to the contour of the recess.
  • the latter In order to enable the flat positioning of the evaporator element 18 on the combustion chamber bottom wall 16, the latter has a depression 32 corresponding in shape to the bulge in the evaporator element 18.
  • an opening 34 is formed in the combustion chamber bottom wall 16, through which the fuel is then introduced into the evaporator element 18, and as can be seen in FIG. 1, this introduction then advantageously takes place in the area in which the evaporator element 18 has the bulge.
  • the air required for combustion can be conveyed into the combustion chamber 12, for example, via air inlet openings 36 which are formed in the outer wall 14 of the combustion chamber at a short distance from the bottom wall 16 of the combustion chamber.
  • FIGS. 1 to 3 Due to the coordinated shape of the ignition element 20 on the one hand and the recess 26 on the other hand, a situation is obtained in the embodiment shown in FIGS. 1 to 3 in which the recess wall 30 the ignition element 20 in an angular range of approximately 180 °, based on a longitudinal central axis of the elongated igniter 20, with a substantially constant distance. This is also illustrated in Fig. 6. Only in the transition area to that section of the recess wall 30 which is no longer designed with a circular contour, but with a rectilinear section in sections, does the distance between the ignition element 20 and the recess wall 30 increase. The same applies in the axial end region 28 of the ignition element 20.
  • FIG. 5 shows an arrangement known from the prior art.
  • the solid line and marked without crosses represents the relative irradiance resulting on the evaporator element as a function of the distance of the radiation perpendicular to the location. It can be seen that there is a maximum of 100% at the location of the vertical incidence, that is to say at 0, but that with increasing distance from this location vertical radiation incidence, there is a clear drop.
  • the line marked with crosses shows the corresponding curve which results when an evaporator element 18 according to the invention is used.
  • FIG. 4 An alternative embodiment of an evaporator element is shown in FIG. 4. It can be seen here that the recess 26 provided for receiving the ignition element 20 is designed such that its recess wall 30 surrounds the ignition element engaging in the recess 26 in an angular range of approximately 270 ° with a substantially constant distance. This has the consequence that, in the representation of FIG. 5, the plateau in which the irradiance is at 100%, based on the total size of the ignition device 20 can be spread even further and thus the radiant heat can be used even more efficiently.
  • the evaporator element 18 is open in the region of its cutout 26 to the combustion chamber 12 in order to allow the vaporized fuel to exit the cutout 26 in the direction of the combustion chamber 12.
  • the recess provided in an evaporator element according to the invention can also have different shapes.
  • the direction of extension can also vary in adaptation to a possibly different direction of extension of the ignition element.
  • the vaporizer element according to the invention also in an annular combustion chamber, in which case the vaporizer element can also be designed in a ring shape in adaptation to the annular combustion chamber base and then has the recess for engaging the ignition element in a peripheral region.
  • evaporator element in principle, it is also possible to line the outer wall of the combustion chamber with an evaporator element according to the invention or, in the case of an annular configuration, possibly also to line an inner wall of the combustion chamber in the manner of a cylindrical sleeve.
  • the evaporator element could then engage, for example in the axial direction, with respect to the longitudinal axis L, through the combustion chamber base in a recess which is then open axially towards the combustion chamber base and extends essentially axially in the evaporator element.
EP02027440A 2002-03-07 2002-12-10 Elément d'évaporateur d'un brûleur à vaporisation Withdrawn EP1342949A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10209967A DE10209967C5 (de) 2002-03-07 2002-03-07 Verdampferelement für einen Verdampferbrenner
DE10209967 2002-03-07

Publications (1)

Publication Number Publication Date
EP1342949A1 true EP1342949A1 (fr) 2003-09-10

Family

ID=27740670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02027440A Withdrawn EP1342949A1 (fr) 2002-03-07 2002-12-10 Elément d'évaporateur d'un brûleur à vaporisation

Country Status (3)

Country Link
EP (1) EP1342949A1 (fr)
JP (1) JP2003302009A (fr)
DE (1) DE10209967C5 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1598595A1 (fr) * 2004-04-26 2005-11-23 J. Eberspächer GmbH Co. KG Arrangement d'évaporateur
EP2072898A1 (fr) * 2007-12-20 2009-06-24 J. Eberspächer GmbH & Co. KG Assemblage d'une chambre de combustion por brûleur à évaporation, en particulier pour appareil de chauffage pour automobile
CN107614975A (zh) * 2015-06-02 2018-01-19 株式会社三五 蒸发式燃烧器
WO2019219510A1 (fr) * 2018-05-15 2019-11-21 Webasto SE Module d'évaporateur pour appareils mobiles de chauffage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011084868C5 (de) * 2011-10-20 2020-07-23 Eberspächer Climate Control Systems GmbH & Co. KG Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät
DE102015110828B4 (de) * 2015-07-06 2019-11-28 Webasto SE Poröses Brennstoffaufbereitungselement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3086579A (en) * 1959-06-10 1963-04-23 Test Inst Corp Liquid fuel heater
DE4243712C1 (de) * 1991-12-14 1994-06-16 Eberspaecher J Heizgerät für Fahrzeuge, das mit flüssigem Brennstoff unabhängig von dem Motor des Fahrzeuges betreibbar ist
US5605453A (en) * 1993-08-26 1997-02-25 J. Eberspacher Burner of a vehicle heater
US5707227A (en) * 1993-08-26 1998-01-13 J. Eberspacher Gmbh & Co. Burner of a vehicle heater

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3233319C2 (de) * 1982-09-08 1986-08-07 Webasto-Werk W. Baier GmbH & Co, 8035 Gauting Verdampfungsbrenner
DE3713460A1 (de) * 1987-04-22 1988-11-10 Webasto Ag Fahrzeugtechnik Verdampfungsbrenner
DE3837074A1 (de) * 1988-10-31 1990-05-03 Eberspaecher J Heizung fuer kraftfahrzeuge und dergleichen
DE3900438A1 (de) * 1989-01-10 1990-07-12 Webasto Ag Fahrzeugtechnik Heizgeraet, insbesondere fahrzeugheizgeraet
DE19703555B4 (de) * 1997-01-31 2004-07-22 J. Eberspächer GmbH & Co. KG Verdampfer-Brennkammer eines Brenners
DE19822140C1 (de) * 1998-05-16 1999-08-12 Webasto Thermosysteme Gmbh Verfahren zur Flammüberwachung bei einem Fahrzeugheizgerät
DE10005376A1 (de) * 1999-02-12 2000-08-17 Denso Corp Verbrennungsheizer zur Verwendung in einem Kraftfahrzeug
DE10164225B4 (de) * 2001-12-31 2004-04-08 Webasto Thermosysteme International Gmbh Verdampfungsbrenner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3086579A (en) * 1959-06-10 1963-04-23 Test Inst Corp Liquid fuel heater
DE4243712C1 (de) * 1991-12-14 1994-06-16 Eberspaecher J Heizgerät für Fahrzeuge, das mit flüssigem Brennstoff unabhängig von dem Motor des Fahrzeuges betreibbar ist
US5605453A (en) * 1993-08-26 1997-02-25 J. Eberspacher Burner of a vehicle heater
US5707227A (en) * 1993-08-26 1998-01-13 J. Eberspacher Gmbh & Co. Burner of a vehicle heater

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1598595A1 (fr) * 2004-04-26 2005-11-23 J. Eberspächer GmbH Co. KG Arrangement d'évaporateur
EP2072898A1 (fr) * 2007-12-20 2009-06-24 J. Eberspächer GmbH & Co. KG Assemblage d'une chambre de combustion por brûleur à évaporation, en particulier pour appareil de chauffage pour automobile
CN107614975A (zh) * 2015-06-02 2018-01-19 株式会社三五 蒸发式燃烧器
WO2019219510A1 (fr) * 2018-05-15 2019-11-21 Webasto SE Module d'évaporateur pour appareils mobiles de chauffage
US11530813B2 (en) 2018-05-15 2022-12-20 Webasto SE Evaporator assembly for mobile heating devices

Also Published As

Publication number Publication date
JP2003302009A (ja) 2003-10-24
DE10209967C5 (de) 2009-01-29
DE10209967C1 (de) 2003-12-11

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