EP2058591B1 - Composant d'évaporateur, notamment pour un brûleur à évaporation d'un appareil de chauffage de véhicule, et son procédé de fabrication - Google Patents

Composant d'évaporateur, notamment pour un brûleur à évaporation d'un appareil de chauffage de véhicule, et son procédé de fabrication Download PDF

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Publication number
EP2058591B1
EP2058591B1 EP08017226.5A EP08017226A EP2058591B1 EP 2058591 B1 EP2058591 B1 EP 2058591B1 EP 08017226 A EP08017226 A EP 08017226A EP 2058591 B1 EP2058591 B1 EP 2058591B1
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EP
European Patent Office
Prior art keywords
evaporator medium
evaporator
medium carrier
heating
porous
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
EP08017226.5A
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German (de)
English (en)
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EP2058591A3 (fr
EP2058591A2 (fr
Inventor
Günter Eberspach
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
Eberspaecher Climate Control Systems GmbH and Co KG
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Application filed by Eberspaecher Climate Control Systems GmbH and Co KG filed Critical Eberspaecher Climate Control Systems GmbH and Co KG
Publication of EP2058591A2 publication Critical patent/EP2058591A2/fr
Publication of EP2058591A3 publication Critical patent/EP2058591A3/fr
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Publication of EP2058591B1 publication Critical patent/EP2058591B1/fr
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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

Definitions

  • the present invention relates to a method for producing an evaporator assembly, as it can be used for example in an evaporator burner of a vehicle heater.
  • evaporator assemblies are generally constructed with an example pot-like evaporator medium carrier, which carries on its side facing a combustion chamber, a porous evaporator medium. Liquid fuel is fed into this porous evaporator medium via a fuel feed line. The liquid fuel is distributed in the inner volume region of the evaporator medium by Kapillartone Angel and possibly also by gravity and thus reaches the side facing the combustion chamber side of the evaporator medium. There, the fuel evaporates into the combustion chamber and forms together with the air introduced into this a combustible mixture.
  • the evaporator medium carrier Heating device provided for example with a heating element.
  • the heating element is energized in the starting phase and thus heats the porous evaporator medium and the liquid fuel contained therein.
  • the construction is generally such that the heating conductor is located on a side of the evaporator medium carrier facing away from the evaporator medium.
  • the heat generated in the heating element is passed through the evaporator medium carrier and thus introduced into the evaporator medium comparatively uniformly, that is, substantially distributed over the entire contact surface between the porous evaporator medium and the evaporator medium carrier.
  • an evaporator assembly for an evaporator burner is known in which the electrically energizable heater or a heating conductor thereof is located on the side facing the porous evaporator medium side of the evaporator medium carrier between this and the porous evaporator medium. While in this embodiment thermal losses are substantially eliminated by the direct contact between the heating conductor and the porous evaporator medium, there is a problem in that, on the one hand, heat transfer into the porous evaporator medium takes place only where it is in direct contact with the heating conductor. Other areas not contacted by the heating conductor are heated only by heat conduction within the porous evaporator medium itself.
  • an evaporator assembly in which at the back of a made of sheet material, pot-like evaporator medium carrier, a heating conductor of a heater is arranged.
  • the EP 1 484 552 A1 discloses an evaporator assembly in which on the side facing away from a combustion chamber side of a bottom wall of a combustion chamber with intermediate storage of a thermally insulating, plate-like intermediate member, a heat conducting element is provided which engages with an ignition region through the bottom wall of the combustion chamber housing in the region of the porous evaporator medium. At the back of this element, a recess arrangement is provided, in which the heating element of a heating device is embedded.
  • the EP 1 574 782 A1 discloses an evaporator burner with a pot-shaped combustion chamber housing. At a bottom region of this combustion chamber housing porous evaporator medium is carried with the interim storage of a heater.
  • the heating device comprises radially staggered, electrically energizable heating elements which are embedded in good thermal conductive material.
  • this object is achieved by a method according to claim 1 for producing an evaporator assembly, in particular for an evaporator burner of a vehicle heater, the evaporator assembly comprising an evaporator medium carrier, a porous evaporator medium and a heater, wherein the heater is at least partially embedded in the building material of the evaporator medium carrier.
  • the evaporator medium carrier is produced by sintering, which facilitates the embedding of the heating device, namely in that the heating device is embedded in the unsintered build material of the evaporator medium carrier and then the evaporator medium carrier is sintered.
  • the heating device is thus at least partially embedded in the building material of the evaporator medium carrier, the heater moves closer to this without having direct contact with the evaporator medium. This means that a lower thermal resistance must be overcome, however, however, a substantially achievable over the entire contact surface heating leads to a corresponding uniform fuel evaporation from the porous evaporator medium.
  • the heating device comprises a heating conductor in contact with the evaporator medium carrier, efficient heating can be achieved with an easily realized structure.
  • the efficiency of the heating can be kept very high, that the heating element is completely embedded in the building material of the evaporator medium carrier. It is ensured in this way that the entire heat emitted by the heating element can be introduced and transferred at least into the evaporator medium carrier.
  • the heating element is not completely embedded in the building material of the evaporator medium carrier. In this way, even with a comparatively thin-walled evaporator medium carrier, it can be ensured that sufficient build-up material of the evaporator medium carrier is still present between the heating conductor and the porous evaporator medium, which homogenization of the heat input into the porous evaporator medium.
  • the present invention relates to a vehicle heater having an evaporator assembly made by the method of the present invention.
  • the Fig. 1 shows a sectional view of an evaporator assembly 10 for a vehicle heater.
  • This evaporator assembly 10 comprises a pot-shaped evaporator medium carrier 12 having a bottom wall 14 and a peripheral wall 16.
  • This evaporator medium carrier 12 can be provided in a combustion chamber housing or limit a combustion chamber together with a circumferential wall of such a combustion chamber assembly as a bottom assembly.
  • the evaporator medium carrier 12 carries a porous evaporator medium 18.
  • This porous evaporator medium 18 constructed for example of metal mesh, network, knitted fabric or ceramic foam receives the liquid fuel via a fuel supply line, not shown, and distributes this liquid fuel in its internal volume range by the capillary action of the pore structure.
  • the fuel exits in vapor form from the porous evaporator medium.
  • the porous evaporator medium 18 abuts against a surface 24 of the evaporator medium carrier 12.
  • a heating element 26 of a generally designated 28 heater is embedded in the bottom wall 14 of the evaporator medium carrier 12.
  • the heating conductor 26 may, for example, be spirally, helically or meander-like embedded in the building material of the evaporator medium carrier 12.
  • Fig. 1 One recognizes in Fig. 1 in that in the thickness direction of the bottom wall 14 the heating conductor 26 is arranged approximately centrally in the region of the bottom wall 14.
  • the complete embedding By embedding the heating element 26, in the embodiment of the Fig. 1 the complete embedding, a very efficient heat transfer of the thermal energy provided by the heating conductor 26 on the Evaporator medium carrier 12 or at the surface 24 adjacent porous evaporator medium 18 reaches. Since there is still sufficient build-up material of the evaporator medium carrier 12 between the heating conductor 26 and the side 22 of the porous evaporator medium 18, a very uniform heat flow is introduced into the porous evaporator medium 18 by heat conduction and heat distribution in the evaporator medium carrier 12. Local overheating is avoided. At the same time, the complete embedding of the heating element 26 has the advantage that the proportion of heat energy conducted in the direction of the porous evaporator medium 18 can be kept very low.
  • evaporator assembly 10 is performed so that the evaporator medium carrier 12 is sintered.
  • the heating conductor 26 can be embedded in the building material initially present in powder form, namely at the positioning provided for this purpose.
  • the evaporator medium carrier 12 is then sintered and thus a solid bond between this and the embedded heating element 26 is produced.
  • the porous evaporator medium 18 may be fixed to the evaporator medium carrier 12 in various ways. For example, after the preparation of the evaporator medium carrier 12, a film of soldering material may be applied to the surface 24, which is melted and then realizes a bond between the porous evaporator medium 18 resting on this film of soldering material and the evaporator medium carrier 12. It is also possible to sinter the porous evaporator medium 18 into the evaporator medium carrier 12. Here, for example, an already prefabricated body of the porous evaporator medium 18 can be used and a solid bond can be realized by producing a sintered layer in the adjoining region of the evaporator medium 18 and the evaporator medium carrier 12.
  • porous evaporator medium 18 it is also conceivable for the porous evaporator medium 18 to be sintered into the evaporator medium carrier 12 in that the build-up material for the porous evaporator medium 18 is initially powdered. or particle-like form is applied to the evaporator medium carrier 12 and then by pressure and temperature exercise, the porous, solid structure of the porous evaporator medium 18 is generated.
  • FIG Fig. 2 An alternative embodiment of the evaporator assembly 10 is shown in FIG Fig. 2 shown.
  • components or assemblies which correspond to components already described above with regard to construction and function are designated by the same reference number with the addition of the appendix "a".
  • heating conductor 26a of the heating device 28a is not completely embedded in the bottom wall 14a of the evaporator medium carrier 12a.
  • a partial region of the surface of the heating conductor 26a which is formed, for example, with a circular cross-section, projects out of the bottom wall 14a via the rear side 30a facing away from the porous evaporator medium 18a.
  • This embodiment variant can also be produced by, during the production of the evaporator medium carrier 12a, embedding the heating conductor 26a in the, for example, still particulate build-up material of the evaporator medium carrier 12a, namely partially embedded, whereupon the sintering process is carried out.
  • Fig. 2 illustrated embodiment is particularly useful when the bottom wall 14a is comparatively thin and then would completely approach embedding the heating element 26a in this bottom wall 14a, the heating element 26a would approach very close to the surface 24a. This could again lead to the problem of too localized thermal interaction of the heating conductor 26a with the porous evaporator medium 18a. Characterized in that the heating conductor 26a at the in Fig.
  • the embodiment shown is held closer to the rear side 30a and partially exits therefrom, ie protrudes with a peripheral region of its outer surface on the side 30a, is between the heating conductor 26a and the Page 22a of the porous evaporator medium 18a still sufficient building material of the evaporator medium carrier 12a, which produces a homogenization of the heat flow.
  • the evaporator medium carrier As a building material of the evaporator medium carrier is particularly suitable because it is produced in a sintering process, ceramic material, as this ensures a very long service life at the occurring very high thermal loads.
  • the heating conductor can of course be implemented in various forms, and leading away from the heating conductor terminals, with which it is connected to a power supply system and which are not shown in the figures, can be guided away at the back, but can of course also on the outer peripheral portion of the bottom wall or the peripheral wall be led away from the area of the evaporator medium carrier.

Claims (5)

  1. Procédé pour la fabrication d'un assemblage d'évaporateur, en particulier pour un brûleur évaporateur d'un dispositif de chauffage d'un véhicule, ledit assemblage d'évaporateur comprenant un support de médium d'évaporateur (12; 12a) en forme de pot avec une paroi de fond (14; 14a) et une paroi circonférentielle (16; 16a), un médium poreux d'évaporateur (18; 18a; 18b; 18c; 18d) supporté à un côté de la paroi de fond (14; 14a) et un dispositif de chauffage (28; 28a), ledit dispositif de chauffage (28; 28a) comprenant un conducteur chauffant (26; 26a) intégré dans la paroi de fond (14; 14a; 14b; 14c) au moins partiellement dans le matériel de construction du support de médium d'évaporateur (12; 12a) et étant ainsi en contact avec le support de médium d'évaporateur (12; 12a),
    comprenant l'intégration du conducteur chauffant (26; 26a) du dispositif de chauffage (28; 28a) dans le matériel de construction du support de médium d'évaporateur (12; 12a), procédé dans lequel le support de médium d'évaporateur (12; 12a) est produit par frittage de sorte que le conducteur chauffant (26; 26a) du dispositif de chauffage (28; 28a) est intégré dans le matériel de construction non-fritté du support de médium d'évaporateur (12; 12a) et que ensuite le support de médium d'évaporateur (12; 12a) est fritté.
  2. Procédé selon la revendication 1,
    caractérisé par le conducteur chauffant (26) étant complètement intégré dans le matériel de construction du support de médium d'évaporateur (12).
  3. Procédé selon la revendication 1,
    caractérisé par le conducteur chauffant (26a) n'étant pas complètement intégré dans le matériel de construction du support de médium d'évaporateur (12a; 12b).
  4. Procédé selon une des revendications 1 à 3,
    caractérisé par le support de médium d'évaporateur (12; 12a) étant fabriqué d'un matériel céramique par frittage.
  5. Dispositif de chauffage d'un véhicule, comprenant un assemblage d'évaporateur fabriqué selon un procédé des revendications 1 à 4.
EP08017226.5A 2007-11-09 2008-09-30 Composant d'évaporateur, notamment pour un brûleur à évaporation d'un appareil de chauffage de véhicule, et son procédé de fabrication Active EP2058591B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710053488 DE102007053488A1 (de) 2007-11-09 2007-11-09 Verdampferbaugruppe, insbesondere für einen Verdampferbrenner eines Fahrzeugheizgeräts, und Verfahren zu deren Herstellung

Publications (3)

Publication Number Publication Date
EP2058591A2 EP2058591A2 (fr) 2009-05-13
EP2058591A3 EP2058591A3 (fr) 2011-08-03
EP2058591B1 true EP2058591B1 (fr) 2016-03-30

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EP08017226.5A Active EP2058591B1 (fr) 2007-11-09 2008-09-30 Composant d'évaporateur, notamment pour un brûleur à évaporation d'un appareil de chauffage de véhicule, et son procédé de fabrication

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EP (1) EP2058591B1 (fr)
DE (1) DE102007053488A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009025593B4 (de) * 2009-06-19 2016-12-08 Eberspächer Climate Control Systems GmbH & Co. KG Verdampferbaugruppe für einen Verdampferbrenner, insbesondere eines Fahrzeugheizgerätes
CN105509044B (zh) * 2014-09-26 2018-05-04 承德坤元环保科技有限公司 一种燃油气化燃烧器的制造方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10136292A1 (de) * 2001-07-25 2003-02-13 Eberspaecher J Gmbh & Co Verdampferbrenner
DE10251438C5 (de) 2002-11-05 2009-06-18 J. Eberspächer GmbH & Co. KG Verdampferbrenner, insbesondere für ein Heizgerät
DE10325574A1 (de) * 2003-06-05 2004-12-30 J. Eberspächer GmbH & Co. KG Brennkammeranordnung für einen Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät
DE102004005267A1 (de) * 2004-02-03 2005-08-25 J. Eberspächer GmbH & Co. KG Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät
DE102004020129B3 (de) 2004-04-26 2005-08-25 J. Eberspächer GmbH & Co. KG Verdampferanordnung und Verfahren zur Herstellung einer Verdampferanordnung
DE102005045067A1 (de) * 2005-09-21 2007-03-22 J. Eberspächer GmbH & Co. KG Reformer zur Bereitstellung von Wasserstoff, insbesondere für eine Brennstoffzelle in einem Fahrzeug

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Publication number Publication date
EP2058591A3 (fr) 2011-08-03
DE102007053488A1 (de) 2009-05-14
EP2058591A2 (fr) 2009-05-13

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