EP1867922B1 - Composant d évaporateur pour un brûleur à évaporation, en particulier pour un chauffage de véhicule ou un chauffage de bâtiment - Google Patents

Composant d évaporateur pour un brûleur à évaporation, en particulier pour un chauffage de véhicule ou un chauffage de bâtiment Download PDF

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Publication number
EP1867922B1
EP1867922B1 EP20070010727 EP07010727A EP1867922B1 EP 1867922 B1 EP1867922 B1 EP 1867922B1 EP 20070010727 EP20070010727 EP 20070010727 EP 07010727 A EP07010727 A EP 07010727A EP 1867922 B1 EP1867922 B1 EP 1867922B1
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EP
European Patent Office
Prior art keywords
air inlet
housing
air
lug
evaporator assembly
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.)
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Application number
EP20070010727
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German (de)
English (en)
Other versions
EP1867922A3 (fr
EP1867922A2 (fr
Inventor
Wolfgang Pfister
Christoph Köberle
Jürgen Peschke
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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Application filed by J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP1867922A2 publication Critical patent/EP1867922A2/fr
Publication of EP1867922A3 publication Critical patent/EP1867922A3/fr
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Publication of EP1867922B1 publication Critical patent/EP1867922B1/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
    • 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 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
    • 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 for an evaporator burner comprising a housing having a peripheral wall and a bottom wall, wherein from the bottom wall an air inlet projection protrudes in the direction of the housing interior, according to the preamble of claim 1.
  • Such evaporator assemblies are used for example in vehicle heaters, such.
  • auxiliary heater or heater used.
  • the air required for combustion with fuel vapor is introduced from the inside into the central region of the housing interior, that is to say a combustion chamber formed therein, via the air inlet approach.
  • the air inlet approach in its peripheral wall along the same extending slots, through which the air introduced into this radially outward and thus flows towards the peripheral wall of the housing of the evaporator assembly.
  • a swirl device is generally provided which ensures that the air flowing into the air inlet lug already has a swirl which is essentially centric to a longitudinal center axis of the housing.
  • An evaporator assembly according to the preamble of claim 1 is known from DE 43 28 790 A1 known.
  • porous evaporator medium is provided on the inside of the peripheral wall of the housing, which receives liquid fuel and evaporates in the direction of the combustion chamber.
  • an antechamber is provided in which a part of the combustion air conveyed by a fan enters tangentially and thus experiences a swirl component before entering the air inlet approach.
  • a peripheral wall of the air inlet approach a plurality of openings are provided through which passes through a part of the combustion air introduced into this in the combustion chamber.
  • the other part of the combustion air portion passed through the air inlet lug flows out of the air inlet lug into the combustion chamber at its axially open end, which is covered by a baffle plate, with a radial flow direction.
  • the non-promoted by the air inlet approach part of the combustion air passes through openings provided in the peripheral wall of the outside of the combustion chamber defining openings in the combustion chamber.
  • the DE 21 29 663 A discloses an evaporative assembly having a housing comprising a peripheral wall and a bottom wall. On the bottom wall, a gasification body constructed of sintered material and thus porous is provided, which is provided with opening regions extending axially therethrough. A portion of the air intended for combustion flows in a bottom wall of the housing facing end of the porous gasification body in a pre-chamber provided therein, passes through a plurality of openings from the antechamber to a main chamber and enters, already enriched with fuel vapor, from the main chamber into a combustion chamber , The main air flow enters the combustion chamber through openings in the region of the bottom wall surrounding the porous gasification body on the outside of the gasification body, where it mixes with fuel vapor.
  • the DE 42 43 712 C1 shows an evaporator assembly with a housing with peripheral wall and bottom wall.
  • an absorbent body formed with a peripheral wall and a bottom wall is provided, which is axially open at its end which is surrounded by the circumferential wall of the housing.
  • liquid fuel is introduced and discharged via this toward a combustion chamber bounded by the housing.
  • a portion of the combustion air flow conveyed by a fan passes through openings in the peripheral wall of the absorbent body and emerges from the latter at its axially open end. Another portion of the combustion air flow is conveyed toward the outside of the peripheral wall of the housing and enters the combustion chamber through the opening provided therein.
  • an evaporator assembly for an evaporator burner according to claim 1.
  • This comprises a housing having a peripheral wall and a bottom wall, projecting from the bottom wall an air inlet approach towards the housing interior and wherein the air inlet approach has a peripheral wall without air passage openings and at its from the Bottom wall remote air inlet end is open.
  • a swirl device is provided upstream of the air inlet lug to swirl the air to be introduced into the air intake lug.
  • peripheral wall of the housing is at least partially covered with porous evaporator medium, fuel vapor can be discharged from this porous evaporator medium, for example, in the space region surrounding the air inlet approach.
  • the air introduced through the air inlet approach can not flow off radially outward, since the circumferential wall of the air inlet attachment has no openings. Rather, the entire air to be introduced flows through the air inlet end into the interior of the housing or those volume region in which the fuel vapor is also present.
  • an axial introduction of the air in the direction of the longitudinal center axis of the housing is provided, wherein the air entering in this axial direction essentially completely retains the previously given swirl, that is, for example, a swirl about the longitudinal center axis of the housing.
  • an air inlet opening is provided at the air inlet end.
  • the air inlet opening may be arranged substantially centrally with respect to the longitudinal center axis of the housing.
  • An acceleration of the air flow can be generated by a nozzle effect, for example, that at the air inlet end an end wall adjoins the peripheral wall of the air inlet approach and that the air inlet approach is open in the region of the end wall.
  • the peripheral wall of the air inlet approach may be formed substantially cylindrical, which primarily refers to the inner surface thereof, so that for the air to be introduced into the housing interior air in the air inlet approach a flow chamber with a substantially constant inner dimension, for example, is provided with a circular shape.
  • the peripheral wall of the air inlet neck in the direction away from the bottom wall has a decreasing inner dimension.
  • This decrease in the inner dimension of the peripheral wall of the air inlet approach may continue up to the air inlet end, or may continue to a minimum dimension, followed by an extension of the peripheral wall with correspondingly widening enclosed by this flow space in the direction of the air inlet end.
  • the peripheral wall of the air inlet approach is curved on its inner side in the direction of the housing longitudinal axis. Step-like or sudden changes in the internal dimension can thus be avoided.
  • the present invention further relates to an evaporator burner, in particular for vehicle heating or building heating, comprising an evaporator assembly as defined above.
  • FIG. 1 an evaporator burner 10 is shown in longitudinal section, which has a generally designated 12 evaporator assembly.
  • This evaporator assembly 12 includes a housing 14 having a peripheral wall 16, which has, for example, a circular cylindrical shape, and an adjoining and thus, for example, integrally formed bottom wall 18. From the bottom wall 18 is in the direction of the housing interior 20, which corresponds essentially to a combustion chamber 22, a Air intake approach 24 from.
  • This air inlet extension 24 which is arranged in the housing 14, for example, centrally to a housing longitudinal axis L and thus extends in the direction of this housing longitudinal axis L, together with the peripheral wall 16 and the bottom wall 18, the essential area of the combustion chamber 22nd
  • a flame tube 26 adjoins the circumferential wall 14, and, for example, in the flame tube 26, a flame cover 28 having a central opening 30 may be provided.
  • porous evaporator medium 32 The inside of the circumferential wall 16 facing the interior of the housing 20 is approximately covered with porous evaporator medium 32 in that length region which also corresponds to the longitudinal extent of the air inlet extension 24.
  • a fuel supply line 34 feeds liquid fuel into the porous evaporator medium 32, and this distributes the fuel fed by capillary action and gives it as fuel vapor at its side facing the combustion chamber 22 side.
  • the air inlet extension 24 is in the illustrated example of substantially cylindrical shape, thus has over its extension length an approximately constant dimension, in particular defined by the Innnradius Ri on. At one of the bottom wall 18 remote air inlet end 36 of the air inlet extension 24 is formed with a substantially this entire air inlet end 36 engaging opening 38 and thus axially open.
  • the air inlet approach 24 in the direction of flow arrows P first of radially outward and then axially deflected air thus flows along the air inlet approach 24 and exits through the opening 38 from this and thus enters the housing interior 20 and the still enclosed by the flame tube 26 volume range. There, the air mixes with the fuel vapor emitted by the porous evaporator medium 32, so that an ignitable or combustible mixture is generated.
  • a swirl device Upstream of the air inlet lug 24 there is provided a swirl device, generally 40 gauge.
  • This includes, for example, integrally formed with the housing 14 a plurality of the air to be introduced from radially outside to radially inwardly leading and circumferentially curved blades 42, which ensure that the air is passed not only from radially outside to radially inside, but also a Circumferential flow component experiences and thus passes as a swirl flow in the air inlet approach 24. That is, the air will flow along the housing longitudinal axis L as a vortex flow substantially helically about this housing longitudinal axis L and accordingly also flow as a vortex flow through the opening 38 into the combustion chamber 22.
  • FIG. 1 shows an air inlet lug 24 which extends over its entire radial extent in the. Region of the air inlet end 36 is open in Fig. 2 1 shows an embodiment in which the peripheral wall 44 of the air inlet attachment 24 is adjoined by an end wall 46, in which, for example, again centrally to the housing longitudinal axis L, the opening 38 is formed.
  • the passage cross-section of the opening 38 does not correspond to the inner dimension Ri of the air inlet extension 24, so that in the area in which the air from the air inlet approach 24 and enters the housing interior 20 and the combustion chamber 22, a nozzle effect can be generated.
  • FIG. 3 A similar effect can also be found in the Fig. 3 in which the peripheral wall 44 of the air inlet lug 24 is designed with an inner dimension Ri decreasing in the direction of the bottom wall 18, decreasing to an area approximately at the longitudinal center of the air inlet lug 24 with minimal inner dimension Ri min . From there, the internal dimension Ri then increases again, so that here a design in the manner of a Venturi nozzle is achieved.
  • Significant here is not only the variation of the inner dimension Ri, but also the continuous variation by curved configuration of the peripheral wall 44 on its inside, viewed in the direction of the housing longitudinal axis L. In this way, steps are prevented with disabilities of the swirl flows generated, provided this is not desired.
  • Fig. 4 For example, an embodiment is shown in which the inner dimension Ri of the peripheral wall 44 of the air inlet boss 24 decreases continuously from the bottom wall 18 towards the air inlet end 36, again with the circumferential wall 44 curved to provide a smooth transition to the smaller gauge portion.
  • NOx values can be achieved which are below a value of 60 mg / kWh while maintaining a minimum value for the CO 2 emissions of 11.8%.
  • This is one equipped with an evaporator assembly 12 according to the invention Evaporator burner not only suitable for use in vehicle heaters, but especially for use in building heating systems.

Claims (10)

  1. Module d'évaporateur pour un brûleur à évaporation, comprenant un boîtier (14) avec und paroi circonférentiel (16) et un paroi de fond (18), une embouchure d'insertion d'air (24) s'étendant du paroi de fond (18) envers l'intérieur du boîtier (20) et l'embouchure d'insertion d'air (24) comprenant un paroi circonférentiel (44) entouré par le paroi circonférentiel (16) du boîtier (14) et définissant avec celui-ci et le paroi de fond du boîtier (16) une chambre de combustion (22), et étant ouverte à son extrémité d'insertion d'air (36) éloignée du paroi de fond (18), le paroi circonférentiel (16) du boîtier (14) étant couvert au moins en partie par un médium d'évaporation poreux (32), un dispositif de tourbillon (40) étant prévu en amont de l'embouchure d'insertion d'air (24) pour tourbillonner l'air à insérer dans l'embouchure d'insertion d'air (24),
    caractérisé par le paroi circonférentiel (44) de l'embouchure d'insertion d'air (24) n'ayant pas d'ouvertures de passage d'air et par l'ensemble de l'air à insérer dans la chambre de combustion (22) circulant à travers l'embouchure d'insertion d'air (24) et son extrémité d'insertion d'air (36) ouverte.
  2. Module d'évaporateur selon la revendication 1,
    caractérisé par une ouverture d'insertion d'air (38) étant prévue à l'extrémité d'insertion d'air (36).
  3. Module d'évaporateur selon la revendication 2,
    caractérisé par l'ouverture d'insertion d'air (38) étant arrangée pour l'essentiel centralement par rapport à un axe central longitudinal (L) du boîtier (14).
  4. Module d'évaporateur selon une des revendications 1 à 3,
    caractérisé par un paroi terminal (46) étant adjacent au paroi circonférentiel (44) de l'embouchure d'insertion d'air (24) à l'extrémité d'insertion d'air (36) et par l'embouchure d'insertion d'air (24) étant ouverte dans la région du paroi terminal (46).
  5. Module d'évaporateur selon une des revendications 1 à 4,
    caractérisé par le paroi circonférentiel (44) de l'embouchure d'insertion d'air (24) étant substantiellement cylindrique.
  6. Module d'évaporateur selon une des revendications 1 à 4,
    caractérisé par le paroi circonférentiel (44) de l'embouchure d'insertion d'air (24) présentant une dimension intérieure (Ri) diminuant dans la direction opposée au paroi de fond (18).
  7. Module d'évaporateur selon la revendication 6,
    caractérisé par la dimension intérieure (Ri) diminuant vers l'extrémité d'insertion d'air (36).
  8. Module d'évaporateur selon la revendication 6,
    caractérisé par la dimension intérieure (Ri) diminuant jusqu'à une dimension minimale (Rimin) et augmentant envers l'extrémité d'insertion d'air (36).
  9. Module d'évaporateur selon la revendication 7 ou 8,
    caractérisé par le paroi circonférentiel (44) de l'embouchure d'insertion d'air (24) étant courbé à la face intérieure en direction de axe central longitudinal (L).
  10. Brûleur à évaporation, en particulier pour un chauffage d'un véhicule ou un chauffage d'un bâtiment, comprenant un module d'évaporateur (12) selon une des revendications précédentes.
EP20070010727 2006-06-12 2007-05-30 Composant d évaporateur pour un brûleur à évaporation, en particulier pour un chauffage de véhicule ou un chauffage de bâtiment Active EP1867922B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610027188 DE102006027188A1 (de) 2006-06-12 2006-06-12 Verdampferbaugruppe für einen Verdampferbrenner, insbesondere für eine Fahrzeugheizung oder eine Gebäudeheizung

Publications (3)

Publication Number Publication Date
EP1867922A2 EP1867922A2 (fr) 2007-12-19
EP1867922A3 EP1867922A3 (fr) 2009-12-30
EP1867922B1 true EP1867922B1 (fr) 2011-07-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070010727 Active EP1867922B1 (fr) 2006-06-12 2007-05-30 Composant d évaporateur pour un brûleur à évaporation, en particulier pour un chauffage de véhicule ou un chauffage de bâtiment

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EP (1) EP1867922B1 (fr)
DE (1) DE102006027188A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011005103B4 (de) * 2011-03-04 2015-04-02 Eberspächer Climate Control Systems GmbH & Co. KG Brennkammerbaugruppe für einen Verdampferbrenner
DE102012101576A1 (de) * 2012-02-27 2013-08-29 Webasto Ag Verdampferbrenner mit Abdeckung für ein mobiles Heizgerät
DE102013214387B4 (de) * 2013-07-23 2020-10-22 Eberspächer Climate Control Systems GmbH Einströmelement, insbesondere für einen Verbrennungsluftströmungsweg im Fahrzeugheizgerät

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE4328790C2 (de) * 1993-08-26 1999-08-19 Eberspaecher J Gmbh & Co Brenner eines Fahrzeugheizgeräts
DE4442425B4 (de) * 1994-05-13 2004-09-16 J. Eberspächer GmbH & Co. KG Brennkammer eines Brenners für ein Fahrzeugheizgerät oder für einen Abgas-Partikelfilter
DE19529994C2 (de) * 1994-11-10 2003-06-26 Eberspaecher J Gmbh & Co Verdampferbrenner für ein Heizgerät
DE29511384U1 (de) * 1995-07-14 1995-10-12 Eberspaecher J Verdampfungsbrennkammer für ein mit flüssigem Brennstoff betriebenes Heizgerät
DE10024003C2 (de) * 2000-05-17 2003-11-27 Webasto Thermosysteme Gmbh Verdampfungsbrenner für ein Heizgerät mit Leitblechanordnung
DE102004057271B4 (de) * 2004-11-26 2008-04-24 Webasto Ag Baugruppe für ein Heizgerät sowie Vefahren zur Herstellung derselben

Also Published As

Publication number Publication date
EP1867922A3 (fr) 2009-12-30
EP1867922A2 (fr) 2007-12-19
DE102006027188A1 (de) 2007-12-13

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