EP2009352B1 - Composant d'évaporateur, en particulier pour un appareil de chauffage de véhicule - Google Patents

Composant d'évaporateur, en particulier pour un appareil de chauffage de véhicule Download PDF

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Publication number
EP2009352B1
EP2009352B1 EP20080009102 EP08009102A EP2009352B1 EP 2009352 B1 EP2009352 B1 EP 2009352B1 EP 20080009102 EP20080009102 EP 20080009102 EP 08009102 A EP08009102 A EP 08009102A EP 2009352 B1 EP2009352 B1 EP 2009352B1
Authority
EP
European Patent Office
Prior art keywords
evaporator medium
porous evaporator
porous
carrier
storage volume
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.)
Active
Application number
EP20080009102
Other languages
German (de)
English (en)
Other versions
EP2009352A3 (fr
EP2009352A2 (fr
Inventor
Walter Blaschke
Michael Tannert
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
Application filed by J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP2009352A2 publication Critical patent/EP2009352A2/fr
Publication of EP2009352A3 publication Critical patent/EP2009352A3/fr
Application granted granted Critical
Publication of EP2009352B1 publication Critical patent/EP2009352B1/fr
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Anticipated expiration legal-status Critical

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/05002—Use of porous members to convert liquid fuel into vapor

Definitions

  • the present invention relates to an evaporator assembly, in particular for a vehicle heater according to the preamble of claim 1.
  • This comprises a carrier, on the carrier porous evaporator medium and a fuel supply line for feeding liquid fuel through an opening in the carrier in the porous evaporator medium.
  • the DE 10 2004 020 507 A1 discloses an evaporator arrangement for producing a hydrocarbon vapor / mixed material mixture in which porous evaporator material is arranged in the bottom area of an evaporator housing.
  • Liquid hydrocarbon is fed into the porous evaporator medium through a fuel feed line led through a bottom wall.
  • this may be provided on its back facing the bottom wall with a recess into which engages the free end of the Brennstoffzu111technisch such that a schneidiger edge region at the free end of the fuel supply into the porous evaporator medium engages.
  • the liquid hydrocarbon discharged from the fuel supply line directly enters the inner volume region of the porous evaporator medium.
  • the DE 101 20 027 A1 discloses an evaporator assembly for a heater for heating the interior of a vehicle, in which a porous evaporator medium is arranged in a shell-like support. Through a bottom wall of the carrier through liquid fuel is introduced via a fuel supply. The back of the porous evaporator medium is covered by a plate provided with passages, so that between the bottom wall of the shell-like carrier and the entire back of the porous evaporator medium, a buffer storage volume is formed, in which the liquid fuel enters after exiting the fuel supply. The liquid fuel pre-distributed in this way already over the entire rear side of the porous evaporator medium passes through the passage openings into the interior volume region of the porous evaporator medium.
  • the DE 21 29 663 A1 discloses an evaporator assembly according to the preamble of claim 1.
  • a combustion device comprising a porous wick.
  • a lower region of the wick which has lower porosity than an upper region, is supplied with liquid fuel by means of a cotton thread, which is transported into the upper region by means of capillary action.
  • an evaporation chamber is provided, which assists in the evaporation of volatile components in the liquid fuel.
  • an evaporative burner in which liquid fuel is fed via a fuel supply line which opens into a circular recess of a multilayer evaporator medium.
  • the evaporator medium layer lying opposite the discharge opening of the fuel feed line has a greater porosity than the evaporator medium layer having a surface provided for dispensing fuel vapor.
  • the EP 0 389 807 A2 discloses an evaporator burner in which through holes are provided in an evaporator medium to assist in vaporization of the liquid fuel.
  • an evaporator burner is disclosed, the evaporator medium having on a side facing a combustion chamber a side facing away from the combustion chamber and provided for receiving liquid fuel side lower porosity.
  • an evaporator assembly in particular for a vehicle heater according to claim 1.
  • This comprises a carrier, at the carrier porous evaporator medium and a fuel supply line for feeding liquid fuel through an opening in the carrier in the porous evaporator medium, wherein a buffer storage volume at least is formed in part in the porous evaporator medium for receiving liquid fuel from the Brennstoffzu classroomtechnisch and passing the liquid fuel received in the porous evaporator medium wherein at least in a discharge opening of the Brennstoffzu classroomtechnisch opposite surface region, the porous evaporator medium is formed with a lower porosity than in a surface area of the porous evaporator medium provided for discharging fuel vapor.
  • the porous evaporator medium is formed with a lower porosity in its entire surface area facing the intermediate storage volume.
  • an intermediate storage volume is formed at least partly in the porous evaporator medium itself, on the one hand the possibility is created that the fuel emerging from the fuel supply line already penetrates deeper into the porous evaporator medium in the region of this intermediate storage volume. At the same time, an increased surface area is provided, which limits the intermediate storage volume formed in the porous evaporator medium and above which the liquid fuel then flows in the porous evaporator medium recorded and further distributed there by Kapillar
  • this porous evaporator medium will generally have a lower material thickness where a buffer storage volume is present.
  • at least one surface area opposite to a discharge port of the fuel supply line the porous evaporator medium is formed with a lower porosity than in a surface area of the porous evaporator medium intended for the delivery of fuel vapor.
  • the largest possible contact between the porous evaporator medium and the carrier can be achieved in that the intermediate storage volume is formed only in the porous evaporator medium.
  • the intermediate storage volume is formed partly in the carrier. This can be particularly advantageous if, with only a limited thickness of the porous evaporator medium used for receiving liquid fuel Interior of the buffer storage volume should be made as large as possible.
  • the intermediate storage volume is formed in the porous evaporator medium by impressing.
  • this manner of producing the intermediate storage volume ensures that the porous structure of the porous evaporator medium in the region surrounding the intermediate storage volume is changed by the pressing load in such a way that there is less porosity than in the then more remote ones volume areas.
  • this is particularly advantageous since the injection of fuel through the comparatively thin porous evaporator medium can be avoided.
  • the intermediate storage volume be provided in a central region of the porous evaporator medium, based on a longitudinal center axis of the carrier.
  • the fuel supply line can - in relation to a longitudinal center axis of the carrier - off-center into this. This simplifies the combination with other assemblies.
  • This eccentric introduction can be used in particular in combination with the installation position of such evaporator assembly, for example, in a vehicle to compensate for unfavorable gravity distribution characteristics.
  • an electrically energizable heating device may be provided on a side of the carrier remote from the porous evaporator medium.
  • evaporator assembly is generally designated 10.
  • the evaporator assembly 10 comprises a support 12 formed, for example, of sheet metal material with a bottom wall 14 and one in the Fig. 2 recognizable in an outer region of the bottom wall 14 adjacent peripheral wall 16.
  • a porous evaporator medium 18 is provided in this essentially so shell-like constructed carrier 12.
  • This porous evaporator medium 18 may, for example, metal mesh, metal fleece or other porous material, such as.
  • foam ceramic, sintered material or the like As foam ceramic, sintered material or the like.
  • the porous evaporator medium 18 is substantially the entire surface of the bottom wall 14 and on the peripheral wall 16 of the circuit-type carrier and can in this by soldering, gluing, Einsintern or the like. be held.
  • a central area of the shell-like support 12 which is also substantially defined by its longitudinal center axis L, this has a directed away in the direction of the porous evaporator medium 18 molding 20 with an opening 22.
  • a free end 24 of a constructed example of metal pipe Brennstoffzu slaughtertechnisch 26 is inserted and fixed therein, for example, by soldering.
  • a sealing member 28 may provide a more fluid-tight seal between the formation 20 and the free end 24 of the fuel supply conduit 26.
  • This porous evaporator medium 18 has, in its region opposite to the opening 30, a buffer storage volume 34 provided by a recess or depression 32.
  • the liquid fuel emerging through the opening 30 from the fuel supply line 96 thus first enters the recess 32 or the intermediate storage volume 34 and enters the porous evaporator medium 18 at the surface 36 of the porous evaporator medium 18 delimiting this intermediate storage volume 34.
  • the intermediate storage volume 34 has a significantly larger transverse dimension than the diameter of the opening 30, a pre-distribution of the supplied liquid fuel already takes place in the region of the transition from the fuel supply line 26 to the porous evaporator medium 18, due to the fact that the intermediate storage volume 34 in FIG the illustrated embodiment is completely formed in the porous evaporator medium 18, already takes place in an integrated into the total volume of this porous evaporator medium 18 area.
  • the liquid fuel can thus be absorbed via the surface 36 and distributed quickly and uniformly in the inner volume region of the porous evaporator medium 18.
  • the depression 32, ie the intermediate storage volume 34 can take place in a particularly advantageous embodiment in the porous evaporator medium by impressing, for example by means of a stamping die.
  • this method of producing the intermediate storage volume is that the volume region 38 close to the surface 36 acts on the pore structure of the porous evaporator medium so that there is less porosity in this volume region 38 than in the adjacent or further volume regions of the porous evaporator medium , in particular that of the surface 40 of the same near volume range, via which then the delivery of the fuel takes place for example in the direction of a combustion chamber.
  • This ensures that, especially in that region of the porous evaporator medium 18, which is directly opposite the opening 30, a spraying of the liquid fuel through the porous evaporator medium 18, which has a reduced thickness in this area, is avoided.
  • the lower porosity volume region 38 encompasses substantially all of the buffer volume 34, it is ensured that the liquid fuel enters the porous evaporator medium 18 substantially uniformly over the surface region 36.
  • the embossing process will result in that the porosity is lower in the part of the surface 36 opposite the opening 30 than in a circumferential area 42 surrounding the depression 32.
  • the Fig. 1 and 2 show that the depression 32 is arranged substantially centered with respect to a longitudinal center axis L of the shell-like carrier 12. It can further be seen that, for example, the depression 32 can be formed with a substantially circular geometry. However, the fuel supply line 26 or its opening 30 is offset with respect to the longitudinal center axis L and thus does not feed the liquid fuel into the central region of the depression 32 of the intermediate storage volume 34.
  • Fig. 1 a further on the side facing away from the porous evaporator medium 18 side of the bottom wall 14 of the support 12 arranged electrically energizable heater 44, for example in the form of a heating coil or otherwise extending heat conductor.
  • this heater 40 By electrical excitation of this heater 40 and the transfer of heat through the bottom wall 14 through the porous evaporator medium, the liquid contained in the porous evaporator medium 18 is heated and thus supports its evaporation.
  • Fig. 1 shows that the porous evaporator medium 18, where no intermediate storage volume is present, substantially completely abuts against the shell-like support 14, a very good heat transfer from the shell-like support to the porous evaporator medium 18 is ensured.
  • the occurrence of column-like spaces is avoided, via which liquid fuel in the adjoining region of the porous evaporator medium 18 passed to the shell-like carrier and there could also escape in the direction of the combustion chamber.
  • an evaporator assembly it is possible by simple measures to have a positive influence on the distribution behavior of the liquid fuel in the porous evaporator medium.
  • the principles of the present invention can also be achieved with structural designs that differ from the shown.
  • part of this intermediate storage volume is completely advantageous in the porous evaporator medium, it is of course also possible for part of this intermediate storage volume to be formed by appropriate shaping of the intermediate storage volume Be formed carrier in the carrier itself. If desired, it is of course also possible to form pre-distribution passages running in the carrier on the rear side of the porous evaporator medium, which can form part of the intermediate storage volume.
  • the carrier for the porous evaporator medium may be plate-like and, for example in conjunction with the porous evaporator medium and the heater may form a bottom assembly, which may then be inserted into an assembly providing the peripheral wall of a combustion chamber or evaporation chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wick-Type Burners And Burners With Porous Materials (AREA)

Claims (9)

  1. Assemblage d'évaporateur (10), en particulier pour un dispositif de chauffage de véhicule, comprenant un support (12), un médium d'évaporateur poreux (18) au support (12) et un conduit d'alimentation en carburant (26) pour introduire du carburant liquide par une ouverture dans le support (12) dans le médium d'évaporateur poreux (18), un volume de stockage intermédiaire (34) étant formé au moins partiellement dans le médium d'évaporateur poreux (18) pour recevoir du carburant liquide du conduit d'alimentation en carburant (26) et pour transférer le carburant liquide reçu là dedans dans le médium d'évaporateur poreux (18),
    caractérisé en ce qu'au moins dans une zone de surface (36) en face d'une orifice de sortie du conduit d'alimentation en carburant (26) le médium d'évaporateur poreux (18) est formé avec une plus faible porosité que dans une zone de surface (40) du médium d'évaporateur poreux (18) prévue pour distribuer de la vapeur de carburant.
  2. Assemblage d'évaporateur (10) selon la revendication 1,
    caractérisé par le médium d'évaporateur poreux (18) étant formé avec une plus faible porosité dans l'entière zone de surface face au volume de stockage intermédiaire (34).
  3. Assemblage d'évaporateur (10) selon une des revendications 1 à 2,
    caractérisé par le volume de stockage intermédiaire (34) étant formé uniquement dans le médium d'évaporateur poreux (18).
  4. Assemblage d'évaporateur (10) selon une des revendications 1 à 2,
    caractérisé par le volume de stockage intermédiaire (34) étant formé partiellement dans le support (12).
  5. Assemblage d'évaporateur (10) selon une des revendications 1 à 4,
    caractérisé par le volume de stockage intermédiaire (34) étant formé dans le médium d'évaporateur poreux (18) par estampillage.
  6. Assemblage d'évaporateur (10) selon une des revendications 1 à 5,
    caractérisé par le volume de stockage intermédiaire (34) étant prévu - en relation à un axe central longitudinal (L) du support (18) - dans une zone centrale du médium d'évaporateur poreux (18).
  7. Assemblage d'évaporateur (10) selon une des revendications 1 à 6,
    caractérisé par le conduit d'alimentation en carburant (26) menant - en relation à un axe central longitudinal (L) du support (18) - au support (12) hors du centre.
  8. Assemblage d'évaporateur (10) selon une des revendications 1 à 7,
    caractérisé par un dispositif de chauffage (44) électriquement excitable étant prévu à un côté du support (12) détourné du support (12).
  9. Assemblage d'évaporateur (10) selon une des revendications 1 à 8,
    caractérisé par le médium d'évaporateur poreux (18) étant, dans la zone qui ne comprend pas de volume de stockage intermédiaire (34), en gros complètement juxtaposé au support (12).
EP20080009102 2007-06-25 2008-05-16 Composant d'évaporateur, en particulier pour un appareil de chauffage de véhicule Active EP2009352B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007029202A DE102007029202A1 (de) 2007-06-25 2007-06-25 Verdampferbaugruppe, insbesondere für ein Fahrzeugheizgerät

Publications (3)

Publication Number Publication Date
EP2009352A2 EP2009352A2 (fr) 2008-12-31
EP2009352A3 EP2009352A3 (fr) 2011-03-30
EP2009352B1 true EP2009352B1 (fr) 2012-08-01

Family

ID=39783200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080009102 Active EP2009352B1 (fr) 2007-06-25 2008-05-16 Composant d'évaporateur, en particulier pour un appareil de chauffage de véhicule

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EP (1) EP2009352B1 (fr)
DE (1) DE102007029202A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012111289C5 (de) 2012-11-22 2022-06-09 Webasto SE Verdampferanordnung für ein mobiles Heizgerät
DE102013220653B4 (de) * 2013-10-14 2019-12-05 Eberspächer Climate Control Systems GmbH & Co. KG Brennkammerbaugruppe, insbesondere für einen Verdampferbrenner
CN107614975B (zh) * 2015-06-02 2019-09-10 株式会社三五 蒸发式燃烧器
DE102016108041B4 (de) * 2016-04-29 2019-12-05 Webasto SE Verdampferkörper

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1830826A (en) * 1925-08-17 1931-11-10 Cox Frederick John Refractory diaphragm for use in surface-combustion apparatus
US4889481A (en) * 1988-08-16 1989-12-26 Hi-Tech Ceramics, Inc. Dual structure infrared surface combustion burner
DE3910424A1 (de) * 1989-03-31 1990-10-04 Webasto Ag Fahrzeugtechnik Mit fluessigem brennstoff betriebenes heizgeraet
DE29512434U1 (de) * 1995-08-02 1995-10-12 Fa. J. Eberspächer, 73730 Esslingen Verdampfungsbrenner für ein Heizgerät
JP3792116B2 (ja) 2000-04-27 2006-07-05 株式会社デンソー 燃焼式ヒータ
DE10252888C5 (de) * 2002-11-12 2010-03-25 Webasto Ag Verdampfungsbrenner für ein mit flüssigem Brennstoff betriebenes Heizgerät
DE10255361B3 (de) * 2002-11-27 2004-06-17 J. Eberspächer GmbH & Co. KG Brennkammerbaugruppe für ein Heizgerät, insbesondere Fahrzeugheizgerät
DE10346558B3 (de) * 2003-10-07 2005-03-17 J. Eberspächer GmbH & Co. KG Verdampferbrenner
DE102004020507A1 (de) 2004-04-26 2005-11-24 J. Eberspächer GmbH & Co. KG Verdampferanordnung zur Erzeugung eines Kohlenwasserstoffdampf/Mischmaterial-Gemisches, insbesondere für eine Reformeranordnung eines Brennstoffzellensystems
DE102005020147A1 (de) * 2005-04-29 2006-11-09 J. Eberspächer GmbH & Co. KG Verdampferanordnung und Verfahren zur Herstellung einer Verdampferanordnung
DE102005003653A1 (de) * 2005-01-26 2006-08-03 J. Eberspächer GmbH & Co. KG Verdampferanordnung, insbesondere für ein Fahrzeugheizgerät oder einen Reformer
DE102005020148A1 (de) * 2005-04-29 2006-11-09 J. Eberspächer GmbH & Co. KG Verdampferanordnung, insbesondere für ein Fahrzeugheizgerät oder einen Reformer
DE102005032980B4 (de) * 2005-07-14 2008-04-24 J. Eberspächer GmbH & Co. KG Brennkammerbaugruppe für einen Verdampferbrenner
US20070134607A1 (en) * 2005-12-09 2007-06-14 Kuo-Tung Chen Structure for forming a burning wick and burning device with a burning wick

Also Published As

Publication number Publication date
EP2009352A3 (fr) 2011-03-30
EP2009352A2 (fr) 2008-12-31
DE102007029202A1 (de) 2009-01-08

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