EP1612480B1 - Brûleur à vaporisation - Google Patents

Brûleur à vaporisation Download PDF

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Publication number
EP1612480B1
EP1612480B1 EP05009733.6A EP05009733A EP1612480B1 EP 1612480 B1 EP1612480 B1 EP 1612480B1 EP 05009733 A EP05009733 A EP 05009733A EP 1612480 B1 EP1612480 B1 EP 1612480B1
Authority
EP
European Patent Office
Prior art keywords
temperature sensor
evaporator medium
combustion chamber
porous evaporator
temperature
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 - Fee Related
Application number
EP05009733.6A
Other languages
German (de)
English (en)
Other versions
EP1612480A2 (fr
EP1612480A3 (fr
Inventor
Walter Blaschke
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
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 Eberspaecher Climate Control Systems GmbH and Co KG filed Critical Eberspaecher Climate Control Systems GmbH and Co KG
Priority to PL05009733T priority Critical patent/PL1612480T3/pl
Publication of EP1612480A2 publication Critical patent/EP1612480A2/fr
Publication of EP1612480A3 publication Critical patent/EP1612480A3/fr
Application granted granted Critical
Publication of EP1612480B1 publication Critical patent/EP1612480B1/fr
Expired - Fee Related legal-status Critical Current
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
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/16—Measuring temperature burner temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/14—Vehicle heating, the heat being derived otherwise than from the propulsion plant

Definitions

  • the present invention relates to an evaporator burner, as it can be used for example in a vehicle heater, according to the preamble of claim 1.
  • the initially liquid fuel is passed into a porous evaporator medium, distributed there under the influence of the capillary action and evaporated in the direction of a combustion chamber.
  • a porous evaporator medium distributed there under the influence of the capillary action and evaporated in the direction of a combustion chamber.
  • an electrically excitable heating device to the porous evaporator medium.
  • an ignitable mixture of combustion air and fuel vapor should be provided only when locally sufficiently high temperatures have been provided by appropriate excitation of an ignition device or when the porous evaporator medium has been sufficiently heated by the associated heater. Furthermore, it is desirable to monitor the vaporization mode as well as the combustion mode in order to be informed early on the operating behavior possibly adversely affecting operating state changes.
  • An evaporator burner according to the preamble of claim 1 is known from US-A-5,480,093 known.
  • An evaporator pad is arranged in a combustion chamber.
  • a temperature sensor for detecting the temperature in the region of the evaporator pad and a glow plug are provided to heat the evaporator pad.
  • the EP-A-0 331 918 discloses an evaporator burner in which a bottom portion of a combustion chamber is formed with a nonwoven material. To detect the flame temperature extends from this Nonwoven material, a flame temperature sensing sensor into the combustion chamber into a region in which the flame propagates as combustion proceeds.
  • An evaporator burner is known in which the liquid fuel is introduced via a fuel line in a porous evaporator medium.
  • a line connection element axially covering the evaporator medium and covering its combustion chamber side is provided, which provides an axial opening for receiving a temperature sensor.
  • the DE-C-198 22 140 discloses an evaporator burner having an absorbent body disposed at the bottom portion of a combustion chamber for receiving liquid fuel.
  • An ignition device passes through the bottom region and thus also the absorbent body and extends with its arranged in a ceramic mass filaments with PTC characteristic in the combustion chamber.
  • the US-A-2003/0027090 discloses an evaporator burner having a porous evaporator medium disposed in a bottom portion of a combustor shell. At a rear side of the bottom of the combustion chamber housing, an electrically energizable heating element with PTC characteristic, ie a defined relationship between the temperature of the heating element and electrical resistance is arranged.
  • an evaporator burner comprising a porous evaporator medium, an electrically excitable heating device for the porous evaporator medium on a side thereof facing away from a combustion chamber, a fuel supply for introducing liquid fuel into the porous evaporator medium and a temperature sensor for detecting a temperature in the region of the porous evaporator medium.
  • the temperature sensor and the heater form an assembly provided in a combustion chamber housing, which assembly may be provided between a wall of the combustion chamber housing and the porous evaporator medium.
  • the operation of such an evaporator burner can be very precisely monitored in a wide variety of phases.
  • the electrically energizable heating device as to whether or not it heats sufficiently, since this heating device is also effective in the region of the porous evaporator medium, that is to say also the detection range of the temperature sensor.
  • the introduction of fuel into the porous evaporator medium can also be detected, since at fuel introduction due to the required heat of vaporization first a temperature drop will occur.
  • the emergence or presence of a flame in the combustion chamber can of course be monitored with such a sensor.
  • the assembly may form a temperature sensor formation, in which substantially the temperature sensor is arranged and which passes through an opening in the porous evaporator medium.
  • a usable in a vehicle heater evaporator burner is generally designated 10.
  • This evaporator burner 10 comprises a combustion chamber housing 12, which is essentially pot-shaped and has a peripheral wall 14 and a bottom wall 16.
  • a porous evaporator medium 18 for example, almost completely covering it, is provided in the combustion chamber housing 12.
  • This example of nonwoven material, braid, knitted fabric, foam ceramic or the like. constructed evaporator medium 18 receives liquid fuel from a fuel line 20 and distributes this in its internal volume range by Kapillarjan Angel.
  • an ignition member 22 is provided, for example, a Glühzündux, which serves to provide 24 locally high enough in a lying above the porous evaporator medium volume range of a combustion chamber 24 that the mixture formed from fuel vapor and combustion air is ignited.
  • the combustion air can be introduced into the combustion chamber 24, for example via openings 26 provided in the circumferential wall 14.
  • a generally designated 28 assembly comprising an electrically energizable heater 30 shown only schematically and a temperature sensor 32.
  • This electrically energizable heater 30 may comprise, for example, a heating conductor of ceramic material or metal material.
  • a heating wire of a nickel-chromium 80/20 alloy can be used, which has a substantially temperature-independent conductivity. This means that changing temperature conditions in the region of the combustion chamber 24 no significant repercussions on the conductivity of this heating wire and thus the heating power of the electrically excitable Heating device 30 have. This facilitates the driving to set a desired heat output.
  • a heat conductor with PTC characteristic can also be used here.
  • the temperature sensor 32 preferably also comprises a line element, for example constructed in a spiral or helical fashion, which has a temperature-dependent line characteristic. Changes in the temperature in the region of this temperature sensor 32 thus lead to changes in the electrical resistance of the same, which is recognizable by corresponding changes in the electrical current with applied voltage.
  • the assembly 28 may have on the porous evaporator medium 18 side facing a plate-like cover 34 having a shell-like shape 36 for receiving the temperature sensor 32.
  • This formation 36 may extend through an opening 38 in the porous evaporator medium 18 into the region of the combustion chamber 24.
  • the temperature sensor 32 extends in the interior region of this formation 36 at least partially into the combustion chamber 24 and in the opening 38 in the porous evaporator medium 18 and thus is able to detect above all temperatures in a volume region near the porous evaporator medium 18.
  • this cover 34 is preferably constructed of thermally highly conductive material, at the rear of this assembly 28 may be limited or covered by an insulating plate 40, the heat loss to the bottom wall 16 out as far as possible prevented.
  • an opening is further provided in the assembly 28, as well as in the bottom wall 16 in order to bring the fuel line 20 to the porous evaporator medium 18 can.
  • four ports 42 may be provided, in each case two for the heater 30 and two for the temperature sensor 32nd
  • the temperature sensor 32 will detect, above all, temperatures or temperature changes which are present in a volume region near the porous evaporator medium 18 or else the heating device 30 associated therewith.
  • the starting phase of the evaporator burner 10 for example, by simultaneously energizing the heating device 30 and the ignition device 22, a preliminary drowning will take place, which of course will also lead to a corresponding heating of the temperature sensor 32. In this way, it can be seen whether sufficient heating will take place in this starting phase. If sufficiently high temperatures are present, for example also detected by the temperature sensor 32, then fuel can be introduced into the porous evaporator medium 18 by appropriately energizing a fuel pump.
  • this initially liquid fuel absorbs heat for evaporation, the temperature will decrease locally in the region of the porous evaporator medium and thus also in the region of the temperature sensor 32, which in turn can be detected by the temperature sensor 32. If no corresponding change in the temperature in the region of the temperature sensor 32 is detected when the fuel pump is energized, then for example this pump can be activated at an increased frequency in order to obtain a higher delivery rate. If a mixture of fuel vapor and air is then provided in the combustion chamber 24, the ignition takes place at a correspondingly high temperature. This ignition leads to a further increase in temperature, which in turn can be indexed by a corresponding sensor signal of the temperature sensor 32.
  • the preceding description thus shows that the provision of a temperature sensor 32 in the region of the porous evaporator medium 18 and also in the region of the electrically energizable heater 30 makes it possible to monitor the operation of the evaporator burner 10 in various phases and, if necessary, to provide correspondingly modified control measures , This also applies in particular to the switching off of the evaporator burner 10, which can be done based on the temperature information supplied by the temperature sensor 32.
  • the heater 30 can be energized to evaporate any remaining fuel from the porous evaporator medium 18 and burn. A significant drop in temperature indicates that there is no more fuel and therefore no further combustion takes place.
  • the ignition member is not part of the assembly 28 and is not integrated into this assembly 28 nor into the porous evaporator medium 18, but is disposed above the porous evaporator medium 18 and extends into the combustion chamber 24, for example the heating characteristic of this ignition member 22 is not adversely affected by the fuel evaporation, which is particularly advantageous in case of failure of the heater 30, since then a start of the evaporator burner 10 can be ensured.

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)
  • Control Of Combustion (AREA)

Claims (3)

  1. Un brûleur à vaporisation comprenant un médium d'évaporation poreux (18), un dispositif de chauffage électriquement excitable (30), pour le médium d'évaporation poreux (18) à un côté du dernier faisant face à l'opposé d'une chambre de combustion (14), une alimentation en combustible (20) pour insérer du combustible liquide dans le médium d'évaporation poreux (18) ainsi qu'un capteur de température (32) pour capter une température dans la région du médium d'évaporation poreux (18),
    caractérisé par le capteur de température (32) et le dispositif de chauffage (30) formant un module (28) prévu dans un boîtier de chambre de combustion (12).
  2. Le brûleur à vaporisation selon la revendication 1,
    caractérisé par le module (28) étant prévu entre une paroi (16) du boîtier de chambre de combustion (12) et le médium d'évaporation poreux (18).
  3. Le brûleur à vaporisation selon la revendication 1 ou 2,
    caractérisé par le module (28) formant une formation de capteur de température (36), où essentiellement le capteur de température (32) est arrangé et laquelle passe à travers une ouverture (38) dans le médium d'évaporation poreux (18).
EP05009733.6A 2004-06-28 2005-05-03 Brûleur à vaporisation Expired - Fee Related EP1612480B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05009733T PL1612480T3 (pl) 2004-06-28 2005-05-03 Palnik odparowujący

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004031174A DE102004031174A1 (de) 2004-06-28 2004-06-28 Verdampferbrenner

Publications (3)

Publication Number Publication Date
EP1612480A2 EP1612480A2 (fr) 2006-01-04
EP1612480A3 EP1612480A3 (fr) 2008-12-10
EP1612480B1 true EP1612480B1 (fr) 2014-04-09

Family

ID=34981587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05009733.6A Expired - Fee Related EP1612480B1 (fr) 2004-06-28 2005-05-03 Brûleur à vaporisation

Country Status (3)

Country Link
EP (1) EP1612480B1 (fr)
DE (1) DE102004031174A1 (fr)
PL (1) PL1612480T3 (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
PL2549182T3 (pl) * 2011-07-21 2014-04-30 Planika Sp Z O O Urządzenie paleniskowe do kominka na paliwo płynne

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807388A1 (de) * 1988-03-07 1989-09-21 Webasto Ag Fahrzeugtechnik Verfahren zum betreiben eines heizgeraets und heizgeraet
JPH03102108A (ja) * 1989-09-14 1991-04-26 Zexel Corp 燃焼式暖房装置
JPH06278450A (ja) * 1993-03-24 1994-10-04 Honda Motor Co Ltd 車両用燃焼式ヒータ
US5617995A (en) * 1994-04-22 1997-04-08 Nippon Soken Inc Combustion heater
JP3773152B2 (ja) * 1997-12-09 2006-05-10 株式会社ミクニアデック 車両用蒸発燃焼式ヒータ
DE19822140C1 (de) * 1998-05-16 1999-08-12 Webasto Thermosysteme Gmbh Verfahren zur Flammüberwachung bei einem Fahrzeugheizgerät
DE10136292A1 (de) * 2001-07-25 2003-02-13 Eberspaecher J Gmbh & Co Verdampferbrenner
US6726114B2 (en) * 2001-06-26 2004-04-27 J. Eberspacher Gmbh & Co., Kg Evaporative burner
DE102004030035A1 (de) * 2004-06-22 2006-01-19 J. Eberspächer GmbH & Co. KG Brennstoffverdampfungsanordnung

Also Published As

Publication number Publication date
EP1612480A2 (fr) 2006-01-04
DE102004031174A1 (de) 2006-01-19
EP1612480A3 (fr) 2008-12-10
PL1612480T3 (pl) 2014-09-30

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