EP0389807B1 - Appareil de chauffage chauffé par du combustible liquide - Google Patents

Appareil de chauffage chauffé par du combustible liquide Download PDF

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Publication number
EP0389807B1
EP0389807B1 EP90103623A EP90103623A EP0389807B1 EP 0389807 B1 EP0389807 B1 EP 0389807B1 EP 90103623 A EP90103623 A EP 90103623A EP 90103623 A EP90103623 A EP 90103623A EP 0389807 B1 EP0389807 B1 EP 0389807B1
Authority
EP
European Patent Office
Prior art keywords
cover
liquid fuel
absorbent body
heating device
device operated
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 - Lifetime
Application number
EP90103623A
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German (de)
English (en)
Other versions
EP0389807A2 (fr
EP0389807A3 (fr
Inventor
Klaus Schaale
Hermann Schönberger
Johann Sperl
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.)
Webasto SE
Original Assignee
Webasto SE
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 Webasto SE filed Critical Webasto SE
Publication of EP0389807A2 publication Critical patent/EP0389807A2/fr
Publication of EP0389807A3 publication Critical patent/EP0389807A3/fr
Application granted granted Critical
Publication of EP0389807B1 publication Critical patent/EP0389807B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a heater operated with liquid fuel, in particular a vehicle heater, which has an evaporation burner which comprises an absorbent body which can be acted upon by the liquid fuel and which has at least one surface facing a combustion chamber of the heater.
  • a heater in particular a vehicle heater, with an evaporation burner of the type mentioned above is known.
  • the absorbent body is formed, for example, by a fleece.
  • the purpose of this absorbent body is to evaporate the fuel and, in conjunction with correspondingly supplied combustion air, to produce a combustible mixture which is burned in a combustion chamber of the heater with the formation of flames. It has been shown here that local overheating can occur on the surface of the absorbent body facing the combustion chamber, as a result of which the absorbent body is attacked, so that its service life is reduced.
  • the fuel absorbed by the absorbent body is also chemically aggressive and the exhaust gases produced during the combustion can also cause the absorbent body to be attacked.
  • a burner for the regeneration of an exhaust gas filter system in particular in a diesel internal combustion engine, is known, in which a mixture of fuel and combustion air by means of an evaporator in a premixing chamber is processed.
  • the premix prepared in this way is introduced into the combustion chamber via nozzles formed by openings. These openings, which act as nozzles, are formed in a flame-retaining plate and are relatively large.
  • the invention aims to provide a heater operated with liquid fuel, in particular a vehicle heater, in which the evaporation burner and in particular its absorbent body is effectively protected against corrosive attacks and has an extended service life.
  • a heater operated with liquid fuel in particular a vehicle heater, with an evaporation burner which has an absorbent body which can be acted upon by the liquid fuel and which has at least one surface facing a combustion chamber of the heater, is characterized in that at least a large part of the the combustion chamber facing surface of the absorbent body to equalize the heat distribution and the fuel preparation has a cover made of highly corrosion-resistant and heat-resistant steel sheet, which is sieve-like through a plurality of openings, which have a diameter in the range of about 0.1 to 2.5 mm .
  • the evaporation burner in the heating device according to the invention thus has a sieve-like cover which covers at least the surface of the absorbent body facing the combustion chamber and thereby reduce the thermal and chemical loads on the absorbent body.
  • this cover covers at least the surface of the absorbent body facing the combustion chamber and thereby reduce the thermal and chemical loads on the absorbent body.
  • the cover offers protection of the absorbent body against the chemically aggressive fuel and the exhaust gases generated during combustion in the combustion chamber.
  • the openings of the cover are preferably regularly distributed over the surface thereof which faces the combustion chamber. Such a design is particularly useful in the case of easily vaporizable, liquid fuel such as gasoline.
  • the distance between the openings should preferably be approximately twice as large as the opening diameter.
  • the thickness of the cover should be about 0.25 to 1.0 mm.
  • a suitable diameter size for gasoline as fuel has been found to be about 2 mm or larger. Satisfactory results can still be obtained with diameters up to approximately 5 mm. In the case of diesel as a liquid fuel, opening diameters in the range from approximately 1 mm to approximately 2 mm are considered to be preferred.
  • the cover can also be designed such that it at least partially surrounds the absorbent body, ie the cover also extends at least partially over the peripheral surface of the absorbent body.
  • the cover also serves as a holder for the absorbent body and positions it at a predetermined location in the combustion chamber.
  • the absorbent body can expediently have at least one through opening in order to quickly heat the fuel to the temperature necessary for evaporation.
  • the cover expediently also has a large through opening or a surface area that is free of openings, the diameter of these openings of the cover corresponding approximately to the diameter of the through opening in the absorbent body.
  • the cover is preferably designed such that it also extends over the inner surface of the ring.
  • the cover is preferably formed in one piece in order to enable easy handling and assembly.
  • Cr-Ni steel has proven to be the preferred material for the cover, and preferably the steel grade X 10 CrNi MoTi 1810.
  • FIG. 1 shows a heater operated with liquid fuel, which is a vehicle heater that is installed, for example, as an additional heater or auxiliary heater in a motor vehicle.
  • the area of the heater 1 in which an evaporation burner 2 is arranged is shown on an enlarged scale in FIG. 1.
  • the evaporation burner 2 has an absorbent body 3, which consists for example of a fleece or several layers of fleece.
  • the absorbent body 3 is acted upon by liquid fuel, such as gasoline or oil, which is supplied via a fuel line 4.
  • the absorbent body 3 has a surface 5 which faces a combustion chamber 6 which is delimited by a combustion tube 7 and adjoins the evaporation burner 2 in the axial direction. As is shown schematically in FIG.
  • the combustion chamber 6 is surrounded by a heat exchanger 8 through which a heat transfer medium flows, which can be a liquid or gaseous heat transfer medium.
  • a heat transfer medium flows, which can be a liquid or gaseous heat transfer medium.
  • heat is released from the hot combustion gases generated in the combustion chamber 6 to the heat transfer medium, whereby the heat transfer medium is heated.
  • the heat carrier heated in this way is then used either directly or indirectly, for example for heating the interior of a motor vehicle.
  • the liquid fuel supplied via the fuel line 4 is evaporated on its surface 5 and an ignitable mixture is generated in this area of the heater 1 in connection with supplied combustion air. This mixture is ignited with an ignition device 9 and a flame forms in the combustion chamber 6.
  • a cover which completely covers the surface 5 of the absorbent body 3 facing the combustion chamber in the example shown in FIG.
  • This cover 10 has a plurality of openings 11, i.e. Openings with a relatively small diameter in the order of about 0.1 mm to about 2.5 mm. These openings 11, which pass through the cover 10, are expediently evenly distributed on the latter, so that the cover 10 is of sieve-like design.
  • the respective distance between the openings 11 is approximately twice as large as the diameter of the respective openings 11.
  • the cover 10 has a thickness in a range from approximately 0.25 to 1.0 mm.
  • the cover 10 is held in the combustion chamber 6, for example, by means of projecting parts 12 which can be distributed over the inner circumference of the combustion tube 7 or which can also be formed, for example, by a continuous, annular part.
  • the cover 10 thereby prevents excessive local heating in the area 5 of the absorbent body 3. Damage to the absorbent body 3 caused by heat can thereby be avoided.
  • the cover 10 serves to protect the absorbent body 3 from the chemically aggressive, liquid fuel which is derived from the absorbent body 3 through the cover 10.
  • the cover 10 prevents hot combustion gases arising during the combustion from attacking the surface 5 of the absorbent body 3. Furthermore, the cover 10 offers protection against mechanical damage to the absorbent body 3, for example when the evaporative burner 2 is installed in the heating device 1. With the aid of the cover 10, the absorbent body 3 can also be arranged repeatedly in the combustion tube 7 at a predetermined location , so that, despite possible dimensional tolerances in the absorbent body 3, a reproducible fuel preparation is obtained in the evaporative burner 2.
  • a variant of an overall designated 10 'cover is shown schematically.
  • the arrangement of the absorbent body 3 corresponds to that shown in FIG. 1.
  • the cover 10 'with the openings 11 extends in the embodiment of FIG. 2 also over the outer circumference 13 of the absorbent body 3 and has a flange-shaped extension 14 at its end.
  • This flange-shaped extension 14 serves to fix the cover 10 'on the combustion chamber 6 delimiting the combustion tube 7.
  • the absorbent body 3 ' has a through opening 15 so that, for example, part of a back wall 16 serving as a carrier is exposed.
  • the absorbent body 3 'associated cover 10 ⁇ also has a large opening 17, i.e. the cover 10 ⁇ is cut out so that the through hole 15 is not covered by the cover 10 ⁇ .
  • the absorbent body 3 ⁇ has a through opening 15 ′ in the upper region, which is aligned with a mouth opening 18 of a fuel line 4 shown in FIG. 1.
  • a large opening 15 ' is provided so that the cover 10 ′′′ does not cover the through opening 15' in Fig. 3b.
  • the same or similar parts as in the embodiment according to FIG. 3a are provided with the same reference symbols.
  • the cover 10 ⁇ ⁇ in Fig. 4 is similar to that shown in Fig. 2 and it is also the through hole 15 of the absorbent body 3 'of the one-piece cover 10 ⁇ ⁇ with its Openings 11 covered.
  • an annular, absorbent body 3 '' ' is inserted into the combustion tube 7 and it is supported by a cover 10 ⁇ ⁇ ', which has openings 11.
  • the cover 10 ⁇ ⁇ ' is designed such that it also covers an inner ring surface 19 of the annular, absorbent body 3' ''.
  • the combustion chamber 6 facing surface 5 'of the annular, absorbent body 3' '' is covered by the cover 10 ⁇ ⁇ '.
  • the cover 10 '' is fixed in the combustion tube 7 with the aid of projecting parts 12, similar to that shown in Fig. 1, in the axial direction.
  • the embodiments of the covers 10... Shown in the figures of the drawing can also be formed by a corresponding wire mesh, which has a correspondingly suitable mesh size.
  • the cover serves in particular to even out the heat distribution and the fuel preparation on the absorbent body 3, .... and it protects the absorbent body 3, .... against thermal, chemical and mechanical loads which increase the service life of the absorbent body 3, .. .. could affect.

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)
  • Spray-Type Burners (AREA)
  • Air-Conditioning For Vehicles (AREA)

Claims (9)

  1. Appareil de chauffage fonctionnant au combustible liquide, notamment appareil de chauffage de véhicule automobile comportant un brûleur à évaporation qui comprend un organe spongieux susceptible d'être alimenté en combustible liquide et possèdant au moins une surface tournée vers une chambre de combustion de l'appareil de chauffage, appareil caractérisé en ce qu'au moins une grande partie de la surface (5) de l'organe spongieux (3, 3', 3'', 3''') tournée vers la chambre de combustion présente un recouvrement (10, 10', 10'', 10''', 10'''', 10''''') constitué par une tôle d'acier très résistante à la corrosion et à la température, pour répartir régulièrement la chaleur et préparer le combustible, cette tôle ayant un grand nombre d'ouvertures (11) qui la traversent pour former un tamis, ces ouvertures ayant un diamètre compris entre 0,1 et 2,5 mm.
  2. Appareil de chauffage utilisant un combustible liquide, selon la revendication 1, caractérisé en ce que les ouvertures (11) sont réparties régulièrement sur le recouvrement (10'... 10''''').
  3. Appareil de chauffage utilisant un combustible liquide, selon la revendication 1 ou 2, caractérisé en ce que la distance séparant les ouvertures (11) correspond sensiblement au double du diamètre des ouvertures.
  4. Appareil de chauffage utilisant un combustible liquide, selon l'une des revendications 1 à 3, caractérisé en ce que le recouvrement (10 ... 10''''') a une épaisseur de l'ordre de 0,25 à 1,0 mm.
  5. Appareil de chauffage utilisant un combustible liquide, selon l'une des revendications 1 à 4, caractérisé en ce que le recouvrement (10 ... 10''''') entoure au moins partiellement un organe spongieux (3' ... 3''').
  6. Appareil de chauffage utilisant un combustible liquide, selon l'une des revendications 1 à 5, caractérisé par un organe spongieux (3', 3'') muni d'au moins une ouverture de passage (15, 15'), le recouvrement (10'', 10''') ayant une ouverture (17, 17') associée dont le diamètre correspond sensiblement à l'ouverture de passage (15, 15').
  7. Appareil de chauffage utilisant un combustible liquide, selon l'une des revendications précédentes, caractérisé en ce que pour un organe spongieux (3''') annulaire, le moyen de recouvrement (10''''') s'étend également sur la surface annulaire intérieure (19).
  8. Appareil de chauffage utilisant un combustible liquide, selon l'une des revendications précédentes, caractérisé en ce que le recouvrement (10 ... 10') est en une seule pièce.
  9. Appareil de chauffage utilisant un combustible liquide, selon l'une des revendications précédentes, caractérisé en ce que le recouvrement (10 ... 10''''') est en acier Cr-Ni, de préférence en acier X 10 CrNi MoTi 1810.
EP90103623A 1989-03-31 1990-02-24 Appareil de chauffage chauffé par du combustible liquide Expired - Lifetime EP0389807B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3910424A DE3910424A1 (de) 1989-03-31 1989-03-31 Mit fluessigem brennstoff betriebenes heizgeraet
DE3910424 1989-03-31

Publications (3)

Publication Number Publication Date
EP0389807A2 EP0389807A2 (fr) 1990-10-03
EP0389807A3 EP0389807A3 (fr) 1991-11-06
EP0389807B1 true EP0389807B1 (fr) 1994-04-13

Family

ID=6377540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90103623A Expired - Lifetime EP0389807B1 (fr) 1989-03-31 1990-02-24 Appareil de chauffage chauffé par du combustible liquide

Country Status (4)

Country Link
US (1) US5020991A (fr)
EP (1) EP0389807B1 (fr)
JP (1) JP2754850B2 (fr)
DE (2) DE3910424A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2520062B2 (ja) * 1991-08-06 1996-07-31 株式会社ミクニ 蒸発式バ―ナ
JP2520078B2 (ja) * 1992-10-28 1996-07-31 株式会社ミクニアデック 蒸発式バ―ナ
US5722588A (en) * 1994-04-13 1998-03-03 Nippon Soken Inc. Combustion heater
DE10004507A1 (de) * 2000-02-02 2001-08-09 Eberspaecher J Gmbh & Co Heizgerät, insbesondere motorunabhängige Fahrzeugheizung
DE102004005267A1 (de) * 2004-02-03 2005-08-25 J. Eberspächer GmbH & Co. KG Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät
AU2008209376B8 (en) * 2007-01-22 2012-11-29 Lg Fuel Cell Systems, Inc. Multistage combustor and method for starting a fuel cell system
DE102007029202A1 (de) * 2007-06-25 2009-01-08 J. Eberspächer GmbH & Co. KG Verdampferbaugruppe, insbesondere für ein Fahrzeugheizgerät
US20100319329A1 (en) * 2009-06-19 2010-12-23 Navin Khadiya Airless thermal regenerator or enhancer with mixer
JP5353822B2 (ja) 2009-09-30 2013-11-27 株式会社Ｉｈｉ 着火装置
JP5569628B2 (ja) * 2009-09-30 2014-08-13 株式会社Ｉｈｉ 着火装置
DE102012100173B4 (de) * 2012-01-10 2014-09-04 Webasto Ag Verdampferbrenner für ein mobiles Heizgerät
DE102012101576A1 (de) 2012-02-27 2013-08-29 Webasto Ag Verdampferbrenner mit Abdeckung für ein mobiles Heizgerät
DE102013220655B4 (de) * 2013-10-14 2016-01-14 Eberspächer Climate Control Systems GmbH & Co. KG Bodenbaugruppe für eine Brennkammerbaugruppe eines Verdampferbrenners
DE102013220654B4 (de) * 2013-10-14 2023-10-19 Eberspächer Climate Control Systems GmbH Brennkammerbaugruppe für einen Verdampferbrenner
US11319916B2 (en) 2016-03-30 2022-05-03 Marine Canada Acquisition Inc. Vehicle heater and controls therefor
DE102016116687B4 (de) * 2016-09-07 2019-12-05 Eberspächer Climate Control Systems GmbH & Co. KG Brennkammerbaugruppe für einen Verdampferbrenner
US10941935B2 (en) 2016-12-01 2021-03-09 Sango Co., Ltd. Evaporation type burner
US10287948B1 (en) 2018-04-23 2019-05-14 Faurecia Emissions Control Technologies, Usa, Llc High efficiency mixer for vehicle exhaust system
US10316721B1 (en) 2018-04-23 2019-06-11 Faurecia Emissions Control Technologies, Usa, Llc High efficiency mixer for vehicle exhaust system
US10787946B2 (en) 2018-09-19 2020-09-29 Faurecia Emissions Control Technologies, Usa, Llc Heated dosing mixer

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227899A (en) * 1935-12-11 1941-01-07 Servel Inc Fuel burner
US2966945A (en) * 1959-03-26 1961-01-03 Edgar S Downs Liquid fuel burning heater
US3144862A (en) * 1960-09-07 1964-08-18 Hupp Corp Fuel burning heaters
JPS5575108A (en) * 1978-11-30 1980-06-06 Matsushita Electric Ind Co Ltd Liquid fuel combustion device
JPS5575109A (en) * 1978-11-30 1980-06-06 Matsushita Electric Ind Co Ltd Liquid fuel combustion device
JPS5762311A (en) * 1980-10-03 1982-04-15 Nippon Soken Inc Liquid fuel combustion apparatus
GB2124360B (en) * 1981-12-23 1985-06-26 Toyotomi Kogyo Co Ltd Combustion cylinder construction for oil space heater
DE3233321C2 (de) * 1982-09-08 1986-08-07 Webasto-Werk W. Baier GmbH & Co, 8035 Gauting Verdampfungsbrenner
US4721456A (en) * 1986-05-08 1988-01-26 A. O. Smith Corporation Combustion element for a radiant energy burner and method of making same
JPH0619212B2 (ja) * 1986-07-08 1994-03-16 いすゞ自動車株式会社 燃焼器

Also Published As

Publication number Publication date
DE59005310D1 (de) 1994-05-19
EP0389807A2 (fr) 1990-10-03
EP0389807A3 (fr) 1991-11-06
US5020991A (en) 1991-06-04
DE3910424A1 (de) 1990-10-04
JP2754850B2 (ja) 1998-05-20
JPH02287006A (ja) 1990-11-27

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