EP1484552B1 - Combustion chamber for a vaporizing burner, particularly for an automotive heater - Google Patents

Combustion chamber for a vaporizing burner, particularly for an automotive heater Download PDF

Info

Publication number
EP1484552B1
EP1484552B1 EP20040013162 EP04013162A EP1484552B1 EP 1484552 B1 EP1484552 B1 EP 1484552B1 EP 20040013162 EP20040013162 EP 20040013162 EP 04013162 A EP04013162 A EP 04013162A EP 1484552 B1 EP1484552 B1 EP 1484552B1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
arrangement according
heat transmission
chamber arrangement
transmission element
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
EP20040013162
Other languages
German (de)
French (fr)
Other versions
EP1484552A1 (en
Inventor
Michael Humburg
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 EP1484552A1 publication Critical patent/EP1484552A1/en
Application granted granted Critical
Publication of EP1484552B1 publication Critical patent/EP1484552B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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
    • F23D2207/00—Ignition devices associated with burner

Definitions

  • the present invention relates to a combustion chamber arrangement for an evaporator burner, in particular for a vehicle heater.
  • a combustion chamber arrangement according to the preamble of claim 1 is made EP 127 5 901 A2 known.
  • a combustion chamber arrangement for a vehicle heater in which a porous evaporator medium is provided in the region of a bottom wall of a cup-shaped combustion chamber, into which the combustion liquid to be burned with liquid fuel is fed and from which this liquid fuel then evaporates towards the combustion chamber.
  • this porous evaporator medium is associated with an electrically energizable heating element to heat it faster and thus to increase the rate of evaporation can.
  • Glühzündux ignition At a distance from the porous evaporator medium designed as Glühzündux ignition is provided which projects with its effective for generating the sufficiently high temperature portion substantially radially into the combustion chamber.
  • a combustion chamber arrangement for an evaporator burner in particular for a vehicle heater, comprising a combustion chamber Vor Fixdes combustion chamber housing and provided in the region of a wall of the combustion chamber housing heating / ignition device with an electrically energizable heating element and with the heating element in heat transfer contact Heat transfer element, wherein the heat transfer element has at least one in the direction of the combustion chamber projecting Zündvorsprung.
  • the electrically energizable heating element performs two functions. On the one hand it serves by its excitation to increase the rate of evaporation of the fuel, on the other hand it forms together with the at least one Zündvorsprung a local region of high temperature in the combustion chamber, so that provided by the electrically energizable heating element and the heat transfer element in heat transported at least one ignition projection can be provided with the temperatures required for ignition. There are not two separate and also separately controlled heating elements required.
  • a porous evaporator medium be provided on one side of the heat transfer element facing the combustion chamber and that the at least one firing projection engage in a recess in the evaporator medium. It is further advantageous if the recess is open towards the combustion chamber, so that the at least one ignition projection can come into direct contact with the ignitable mixture formed in the combustion chamber and in particular in the environment of the porous evaporator medium. The effect can be further improved by the fact that the at least one Ignition projection extends beyond the evaporator medium out into the combustion chamber.
  • the heat transfer element to one of the combustion chamber facing away from the wall of the combustion chamber housing is arranged in heat transfer contact with this and that the at least one ignition projection passes through an opening formed in the wall.
  • the heating power required for generating the high ignition temperatures in the electrically energizable heating element can result in that the heat transfer element is also heated very strongly.
  • a very strong or excessive heating of the heat transfer element can result in a correspondingly strong, unwanted heating of the evaporator medium. It is therefore proposed according to a further aspect that between the heat transfer element and the evaporator element, an intermediate element with lower thermal conductivity than the heat transfer element is arranged.
  • this intermediate element is ensured that even if the heating element is very strong and generates correspondingly high temperatures, in the region of at least one Zündvorsprungs these high temperatures can be effective while in other areas, ie in those areas in which heat is to be transported from the heat transfer element in the evaporator medium, a generated by the provision of the intermediate element reduced heat transfer or a higher thermal resistance is provided. In this way, although the evaporator medium is still heated, but not so strong that damage or undesirable reactions occur.
  • an opening which can enforce the at least one Zündvorsprung then.
  • the intermediate element may have a thermal conductivity in the range of 0.1 to 0.5 W / mK, preferably about 0.3 W / mK, and may be constructed of a ceramic material, which may generally be referred to as an insulating ceramic.
  • the wall is a bottom wall of the evaporator housing.
  • the heat transfer element has a thermal conductivity or specific thermal conductivity in the range of 30 to 200 W / mK, preferably 100 to 180 W / mK. Furthermore, in order to be able to provide an electrical insulation of the electrically excitable heating element, for example with respect to the generally metal combustion chamber housing, it is further proposed that the heat transfer element have a specific electrical resistance of at least 10 11 ⁇ cm, preferably at least 10 14 ⁇ cm.
  • Ceramic material for example aluminum nitride, silicon nitride or silicon carbide, has proved to be a particularly preferred material for the heat transfer element.
  • a Einsenkungungsan angel is provided, in which the heating element is at least partially accommodated.
  • the heating element is at least partially embedded in the heat transfer element and increases the heat transfer surface accordingly.
  • the heating element between the heat transfer element and a closing element is included.
  • the closing element has a lower thermal conductivity than the heat transfer element.
  • the thermal conductivity of the terminating element may be in the range of 0.02 to 0.06 W / mK, preferably about 0.04 W / mK.
  • This closing element can also be formed, for example, of ceramic material.
  • the present invention relates to a vehicle heater, in which a combustion chamber arrangement according to the invention is provided.
  • a vehicle heater is generally designated 10.
  • a heater 10 can be used for example as a heater or as a heater in a vehicle.
  • the heater 10 includes a combustor assembly 12 in which thermal energy is provided by burning a fuel / air mixture, as described below, and a heat exchanger assembly 14 in which it provides combustion and combustion exhaust gases Heat can be transmitted to a median to be heated, for example air or even the circulating in a cooling system of an internal combustion engine coolant.
  • Combustor assembly 12 includes a combustor housing, generally designated 16.
  • This combustion chamber housing 16 is essentially pot-shaped and delimited by a cylindrical circumferential wall 18 and a bottom wall 20, for example, integrally formed therewith a bottom wall 20 in the direction of the heat exchanger assembly 14 open combustion chamber in the illustrated embodiment are in the peripheral wall 18 more combustion air inlet openings 24th so that the combustion air supplied in an air supply space 26 and symbolically indicated by the arrow P 1 can be introduced into the combustion chamber 22.
  • the air supply chamber 26 may be limited by the combustion chamber housing 16 and a surrounding air guide housing 28.
  • the combustion air is in the air supply space 26 by a per se known air conveying blower, for example, radially or possibly axially, based on a longitudinal axis A of the combustion chamber assembly 12, promoted.
  • the flame tube 32 is surrounded by the likewise substantially cup-shaped heat exchanger assembly 12 and an inner heat exchanger housing 34 thereof. Between this inner heat exchanger housing 34 and the flame tube 32, a combustion exhaust gas flow space 36 is formed, along which the combustion exhaust gases flow back towards the combustor 12 and then discharged through an outlet 38 formed, for example, in the air guide housing 28 to the environment or to an exhaust gas purification system, such as through a Arrow P 2 indicated.
  • a flow space 42 is formed, which is flowed through by the medium to be heated. This occurs in the region of an inlet 44 in the heat exchanger assembly 14 and leaves it in the region of an outlet 46th
  • both the heat exchanger assembly 14 and the combustion chamber assembly 12, as described above and in the Fig. 1 are shown as examples of a variety of different modification options.
  • a porous evaporator medium 50 is provided on a combustion chamber 22 side facing 48 of the bottom wall 20 of the combustion chamber housing 16.
  • This porous evaporator medium which can be formed, for example, from ceramic foam, nonwoven material, mesh material or the like, preferably covers the entire surface of the side 48 of the bottom wall 20.
  • a passage opening for a fuel line 52 is formed, which leads directly to the evaporator medium 50, so that fuel, as indicated by an arrow P 3 , can be introduced into the porous evaporator medium 50.
  • fuel lines 52 can also lead to the porous evaporator medium 50 at a plurality of regions of the bottom wall 20.
  • heating / ignition device At the side facing away from the combustion chamber 22 side 54 of the bottom wall 20 is a generally designated 56 heating / ignition device is provided.
  • a plate-like designed heat transfer element 58 the its side 54 facing the bottom wall 20 side 60 is in heat transfer contact via an intermediate element 82 with the bottom wall 20 and on its side facing away from the bottom wall 20 side 62 has a ring or spiral-like Einsenkungsan Aunt 64.
  • an electrically energizable heating element 66 designed as a heating coil or heating coil or the like is substantially accommodated in such a way that it does not project beyond the heat transfer element 58 on the side 62.
  • the electrically energizable heating element 66 is further covered on the side 62 by a covering element 68 that is in contact with or connected to the heating element 58, so that it is essentially enclosed between this covering element 68 and the heat transfer element 58, with the exception of electrical supply regions.
  • the heat transfer element 58 has a substantially ring-like configuration, and in the cover 68 is provided for the or each line 52 an opening 70 designed in the form of a nozzle 72, so that on the one hand the heat transfer element 58 in the region of this opening 70 through the nozzle-like Section 72 of the cover 68 is covered and on the other hand, a separation between this heat transfer element 58 and the line 52 can be made.
  • the cover member 68 has a cylindrical projection-like projection 74 which covers the heat transfer member 58 toward the outside.
  • the plate-like intermediate element 82 also has, in association with the or each line 52, an opening 84, which is likewise formed in a substantially neck-like projection 86.
  • this nozzle 86 thermally closes off the heat transfer element 58 radially inward with respect to a fuel line 52.
  • the cover 68 is preferably made of good thermal insulating material such. As ceramic material or the like. It is thus ensured that the heat generated in the region of the heating element 60 by electrical excitation thereof is introduced into the evaporator medium 50 or the combustion chamber 22 substantially completely and without major heat losses.
  • the heat transfer element 58 is advantageous to produce from a good thermally conductive material.
  • a good thermally conductive material is special ceramic material such.
  • aluminum nitride, silicon nitride or silicon carbide proved to be particularly advantageous, which has a specific thermal conductivity, which is in the range of 30 to 180 W / mK and thus can be substantially higher than the thermal conductivity of metal material such. Steel.
  • this material also has a sufficiently high resistivity in the range, for example, 10 12 - 10 14 ⁇ cm, so that equally good electrical insulation between the heating element 60 and the combustion chamber housing 16 generally made of metal, such as aluminum or steel material, is provided ,
  • openings 88, 76, 78 aligned with one another in the intermediate element 82, the bottom wall 20 of the combustion-chamber housing 16 and the porous evaporator medium 50 are formed.
  • An educated on the heat transfer element 58 and facing the combustion chamber 22 to be positioned side 60 projecting Zündvorsprung 80 passes through at the combustion chamber housing 16 worn heater / igniter 56 these openings 88, 76, 78.
  • the dimension or shape of these openings 88, 76, 78 matched to the shape of the Zündvorsprungs 80 that the Zündvorsprung 80 with neither the intermediate element 82 nor with the bottom wall 20 is still in direct heat transfer contact with the porous evaporator medium 50.
  • the heating element 66 In order to be able to generate these temperatures, it may be necessary to energize the heating element 66 comparatively strongly, so that not only in the area of the ignition projection 80 in the heat transfer element 58, but also in the other serving for heat transfer into the porous evaporator medium 50 areas very high temperatures arise.
  • the above-mentioned intermediate element 82 is provided, which ensures that in the region of a respective Zündvorsprungs 80, these high temperatures in the heat transfer element 58 can be used directly while in the other, for the purpose of heating the porous evaporator medium 50, a reduced heat transfer will take place by additionally inserting a heat conduction resistance.
  • the intermediate element 82 may be constructed, for example, of a so-called insulating ceramic, which has a thermal conductivity or specific thermal conductivity in the range of 0.3 W / mK.
  • insulating ceramic which has a thermal conductivity or specific thermal conductivity in the range of 0.3 W / mK.
  • thermal insulation materials that are resistant to high temperatures, eg. Available under the registered trademark PROMAFELD 9.
  • the material or also the thickness of the intermediate element 82 it can be predetermined here how large the heat conduction resistance is during heat transfer to the porous evaporator medium 50 and thus what proportion of the heat is transferred to this porous evaporator medium on the one hand and to the projection 80 on the other hand ,
  • a plurality of ignition projections 80 can be provided in order to provide a plurality of regions distributed over the region of the bottom wall 20, in which case the ignition will then start, so that from the beginning of the combustion already a very uniform distribution of combustion in the combustion chamber 22 can be obtained.
  • the heating element 66 can be operated in such a way that it is initially more strongly excited at the start of the starting phase, that is, it heats up more to provide the high temperatures required in the region of the ignition projection 80, and then, when the combustion has been started, operated with lower heating power, so that substantially only the fuel evaporation is increasingly supported, if necessary.
  • a conventional heating wire, z. Kanthal which can provide a heating power of about 250W.
  • the above-mentioned intermediate element 82 or its function of the additional heat transfer barrier can also be taken over by the bottom wall 20 of the combustion chamber housing 16 itself if the combustion chamber housing 16 or at least the bottom wall 20 thereof is constructed of a material which generates a corresponding heat transfer barrier.
  • Difficult heat transfer between the heat transfer element 58 and the bottom wall 20 of the combustion chamber housing 16 can also be achieved by surface structuring in the region of at least one surface of these two components, so that with corresponding roughened, ribbed or otherwise structured surface, the total contact surface of these two components is reduced and a correspondingly reduced heat transfer from the heat transfer element 58 to the bottom wall 20 of the combustion chamber housing 16 will be the result. It is also conceivable, in principle, to arrange the intermediate element provided between the heat transfer element and the porous evaporator medium, if this is not formed by the bottom wall 20 itself, between the bottom wall 20 and the porous evaporator medium 50.
  • the heating / ignition device 56 to be provided according to the invention can also be provided if a combustion air inlet connection is formed in the region of the bottom wall 20 of the combustion chamber housing 16, so that the combustion air flows in Substantially from the inside radially into the combustion chamber 22 can flow or can additionally flow from radially inward into the combustion chamber 22.
  • a combustion air inlet connection is formed in the region of the bottom wall 20 of the combustion chamber housing 16, so that the combustion air flows in Substantially from the inside radially into the combustion chamber 22 can flow or can additionally flow from radially inward into the combustion chamber 22.

Landscapes

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

Description

Die vorliegende Erfindung betrifft eine Brennkammeranordnung für einen Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät.The present invention relates to a combustion chamber arrangement for an evaporator burner, in particular for a vehicle heater.

Eine Brennkammeranordnung gemäß dem Oberbegriff von Anspruch 1 ist aus EP 127 5 901 A2 bekannt.A combustion chamber arrangement according to the preamble of claim 1 is made EP 127 5 901 A2 known.

Aus der DE 100 20 027 A1 ist eine Brennkammeranordnung für ein Fahrzeugheizgerät bekannt, bei welcher im Bereich einer Bodenwandung eines topfartig ausgestalteten Brennkammergehäuses ein poröses Verdampfermedium vorgesehen ist, in welches der mit Verbrennungsluft zusammen zu verbrennende flüssige Brennstoff eingespeist wird und aus welchem dieser flüssige Brennstoff dann in Richtung zur Brennkammer hin abdampft. Um die Abdampfungsrate zu erhöhen und somit auch die Startphase der Brennkammer zu verkürzen, ist diesem porösen verdampfermedium ein elektrisch erregbares Heizelement zugeordnet, um dieses schneller erwärmen zu können und somit die Abdampfungsrate steigern zu können. In Abstand zu dem porösen Verdampfermedium ist ein als Glühzündstift ausgestaltetes Zündorgan vorgesehen, das mit seinem zum Erzeugen der ausreichend hohen Temperaturen wirksamen Abschnitt im Wesentlichen radial in die Brennkammer ragt. Somit werden in der Startphase in geringem Abstand über dem porösen Verdampfermedium die Temperaturen erzeugt, welche das zündfähige Gemisch zünden und somit die Verbrennung in der Brennkammer starten können.From the DE 100 20 027 A1 a combustion chamber arrangement for a vehicle heater is known in which a porous evaporator medium is provided in the region of a bottom wall of a cup-shaped combustion chamber, into which the combustion liquid to be burned with liquid fuel is fed and from which this liquid fuel then evaporates towards the combustion chamber. In order to increase the rate of evaporation and thus shorten the start phase of the combustion chamber, this porous evaporator medium is associated with an electrically energizable heating element to heat it faster and thus to increase the rate of evaporation can. At a distance from the porous evaporator medium designed as Glühzündstift ignition is provided which projects with its effective for generating the sufficiently high temperature portion substantially radially into the combustion chamber. Thus, the temperatures are generated in the start phase at a small distance above the porous evaporator medium, which ignite the ignitable mixture and thus can start the combustion in the combustion chamber.

Es ist die Aufgabe der vorliegenden Erfindung, eine Brennkammeranordnung für einen Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät, vorzusehen, welches bei einfachem und kostengünstigem Aufbau die Realisierung einer kurzen Startphase ermöglicht.It is the object of the present invention to provide a combustion chamber arrangement for an evaporator burner, in particular for a vehicle heater, which enables the realization of a short start-up phase with a simple and inexpensive construction.

Erfindungsgemäß wird diese Aufgabe gelöst durch eine Brennkammeranordnung für einen Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät, umfassend ein eine Brennkammer vorsehendes Brennkammergehäuse und eine im Bereich einer Wandung des Brennkammergehäuses vorgesehene Heiz/Zünd-Einrichtung mit einem elektrisch erregbaren Heizelement und einem mit dem Heizelement in Wärmeübertragungskontakt stehenden Wärmeübertragungselement, wobei das Wärmeübertragungselement wenigstens einen in Richtung zur Brennkammer vorstehenden Zündvorsprung aufweist.According to the invention, this object is achieved by a combustion chamber arrangement for an evaporator burner, in particular for a vehicle heater, comprising a combustion chamber Vorsehendes combustion chamber housing and provided in the region of a wall of the combustion chamber housing heating / ignition device with an electrically energizable heating element and with the heating element in heat transfer contact Heat transfer element, wherein the heat transfer element has at least one in the direction of the combustion chamber projecting Zündvorsprung.

Bei der vorliegenden Erfindung übernimmt das elektrisch erregbare Heizelement zwei Funktionen. Zum einen dient es durch seine Erregung dazu, die Abdampfungsrate des Brennstoffs zu erhöhen, zum anderen bildet es zusammen mit dem wenigstens einen Zündvorsprung einen lokalen Bereich hoher Temperatur im Bereich der Brennkammer, so dass durch die vom elektrisch erregbaren Heizelement bereitgestellte und über das Wärmeübertragungselement in diesen wenigstens einen Zündvorsprung transportierte Wärme die zum Zünden erforderlichen Temperaturen bereitgestellt werden können. Es sind nicht zwei separate und auch separat anzusteuernde Heizorgane erforderlich.In the present invention, the electrically energizable heating element performs two functions. On the one hand it serves by its excitation to increase the rate of evaporation of the fuel, on the other hand it forms together with the at least one Zündvorsprung a local region of high temperature in the combustion chamber, so that provided by the electrically energizable heating element and the heat transfer element in heat transported at least one ignition projection can be provided with the temperatures required for ignition. There are not two separate and also separately controlled heating elements required.

Um die Verdampfungsrate in der Brennkammer weiter verbessern zu können, wird vorgeschlagen, dass an einer der Brennkammer zugewandten Seite des Wärmeübertragungselements ein poröses Verdampfermedium vorgesehen ist und dass der wenigstens eine Zündvorsprung in eine Aussparung in dem Verdampfermedium eingreift. Dabei ist es weiter vorteilhaft, wenn die Aussparung zur Brennkammer hin offen ist, so dass der wenigstens eine Zündvorsprung in direktem Kontakt mit dem in der Brennkammer und insbesondere in der Umgebung des porösen Verdampfermediums gebildeten zündfähigen Gemisch treten kann. Dabei kann die Wirkung weiter dadurch verbessert werden, dass der wenigstens eine Zündvorsprung sich über das Verdampfermedium hinaus in die Brennkammer erstreckt.In order to be able to further improve the evaporation rate in the combustion chamber, it is proposed that a porous evaporator medium be provided on one side of the heat transfer element facing the combustion chamber and that the at least one firing projection engage in a recess in the evaporator medium. It is further advantageous if the recess is open towards the combustion chamber, so that the at least one ignition projection can come into direct contact with the ignitable mixture formed in the combustion chamber and in particular in the environment of the porous evaporator medium. The effect can be further improved by the fact that the at least one Ignition projection extends beyond the evaporator medium out into the combustion chamber.

Um den Aufbau bzw. den Zusammenbau einer erfindungsgemäßen Brennkammeranordnung sehr einfach gestalten zu können und insbesondere auch die im Bereich der Heiz/Zünd-Einrichtung vorhandenen Komponenten gegen übermäßig hohe, bei Verbrennung entstehende Temperaturen schützen zu können, wird vorgeschlagen, dass das Wärmeübertragungselement an einer von der Brennkammer abgewandten Seite der Wandung des Brennkammergehäuses in Wärmeübertragungskontakt mit diesem angeordnet ist und dass der wenigstens eine Zündvorsprung eine in der Wandung gebildete Öffnung durchsetzt.In order to be able to design the assembly or assembly of a combustion chamber arrangement according to the invention very simply and in particular to protect the existing in the heating / ignition device components against excessively high, resulting from combustion temperatures, it is proposed that the heat transfer element to one of the combustion chamber facing away from the wall of the combustion chamber housing is arranged in heat transfer contact with this and that the at least one ignition projection passes through an opening formed in the wall.

Die zum Erzeugen der hohen Zündtemperaturen erforderliche Heizleistung bei dem elektrisch erregbaren Heizelement kann zur Folge haben, dass auch das Wärmeübertragungselement sehr stark erwärmt wird. Eine sehr starke bzw. zu starke Erwärmung des Wärmeübertragungselements kann eine entsprechend starke, ungewünschte Erwärmung des Verdampfermediums zur Folge haben. Es wird daher gemäß einem weiteren Aspekt vorgeschlagen, dass zwischen dem Wärmeübertragungselement und dem Verdampferelement ein Zwischenelement mit geringerer Wärmeleitfähigkeit als das Wärmeübertragungselement angeordnet ist. Durch dieses Zwischenelement wird dafür gesorgt, dass auch dann, wenn das Heizelement sehr stark erregt wird und entsprechend hohe Temperaturen erzeugt, im Bereich des wenigstens einen Zündvorsprungs diese hohen Temperaturen wirksam werden können, während in anderen Bereichen, also in denjenigen Bereiche, in welchen Wärme vom Wärmeübertragungselement in das Verdampfermedium transportiert werden soll, ein durch das Bereitstellen des Zwischenelements erzeugter verminderter Wärmeübertrag bzw. ein höherer Wärmeleitwiderstand bereitgestellt wird. Auf diese Art und Weise wird zwar das Verdampfermedium immer noch erwärmt, nicht aber so stark, dass Beschädigungen oder unerwünschte Reaktionen auftreten. Hier kann auch in dem Zwischenelement wieder eine Öffnung vorgesehen sein, die der wenigstens eine Zündvorsprung dann durchsetzen kann.The heating power required for generating the high ignition temperatures in the electrically energizable heating element can result in that the heat transfer element is also heated very strongly. A very strong or excessive heating of the heat transfer element can result in a correspondingly strong, unwanted heating of the evaporator medium. It is therefore proposed according to a further aspect that between the heat transfer element and the evaporator element, an intermediate element with lower thermal conductivity than the heat transfer element is arranged. By this intermediate element is ensured that even if the heating element is very strong and generates correspondingly high temperatures, in the region of at least one Zündvorsprungs these high temperatures can be effective while in other areas, ie in those areas in which heat is to be transported from the heat transfer element in the evaporator medium, a generated by the provision of the intermediate element reduced heat transfer or a higher thermal resistance is provided. In this way, although the evaporator medium is still heated, but not so strong that damage or undesirable reactions occur. Here can Also be provided in the intermediate element again an opening, which can enforce the at least one Zündvorsprung then.

Das Zwischenelement kann eine Wärmeleitfähigkeit im Bereich von 0,1 bis 0,5 W/mK, vorzugsweise etwa 0,3 W/mK aufweisen und kann aus einem Keramikmaterial, das im Allgemeinen als Isolierkeramik bezeichnet werden kann, aufgebaut sein.The intermediate element may have a thermal conductivity in the range of 0.1 to 0.5 W / mK, preferably about 0.3 W / mK, and may be constructed of a ceramic material, which may generally be referred to as an insulating ceramic.

Bei einer aus Fertigungsgründen besonders bevorzugten Ausgestaltungsform kann vorgesehen sein, dass die Wandung eine Bodenwandung des Verdampfergehäuses ist.In a particularly preferred embodiment for manufacturing reasons, it can be provided that the wall is a bottom wall of the evaporator housing.

Weiter wird vorgeschlagen, dass das Wärmeübertragungselement eine Wärmeleitfähigkeit bzw. spezifische Wärmeleitfähigkeit im Bereich von 30 bis 200 W/mK, vorzugsweise 100 bis 180 W/mK, aufweist. Um weiterhin eine elektrische Isolation des elektrisch erregbaren Heizelements beispielsweise bezüglich des im Allgemeinen aus Metall aufgebauten Brennkammergehäuses bereitstellen zu können, wird weiter vorgeschlagen, dass das Wärmeübertragungselement einen spezifischen elektrischen Widerstand von wenigstens 1011Ωcm, vorzugsweise wenigstens 1014Ωcm, aufweist.It is further proposed that the heat transfer element has a thermal conductivity or specific thermal conductivity in the range of 30 to 200 W / mK, preferably 100 to 180 W / mK. Furthermore, in order to be able to provide an electrical insulation of the electrically excitable heating element, for example with respect to the generally metal combustion chamber housing, it is further proposed that the heat transfer element have a specific electrical resistance of at least 10 11 Ωcm, preferably at least 10 14 Ωcm.

Als besonders bevorzugtes Material für das Wärmeübertragungselement hat sich Keramikmaterial, beispielsweise Aluminiumnitrid, Siliziumnitrid oder Siliziumcarbid, erwiesen.Ceramic material, for example aluminum nitride, silicon nitride or silicon carbide, has proved to be a particularly preferred material for the heat transfer element.

Zum Verbessern des Wärmeübertrags vom elektrisch erregbaren Heizelement in das Wärmeübertragungselement wird weiter vorgeschlagen, dass in dem Wärmeübertragungselement eine Einsenkungsanordnung vorgesehen ist, in welcher das Heizelement wenigstens teilweise aufgenommen ist. Somit ist das Heizelement in das Wärmeübertragungselement zumindest bereichsweise eingebettet und die Wärmeübertragungsoberfläche entsprechend vergrößert.To improve the heat transfer from the electrically energizable heating element in the heat transfer element is further proposed that in the heat transfer element, a Einsenkungungsanordnung is provided, in which the heating element is at least partially accommodated. Thus, the heating element is at least partially embedded in the heat transfer element and increases the heat transfer surface accordingly.

Um Wärmeverluste so weit als möglich ausschließen zu können, wird weiter vorgeschlagen, dass das Heizelement zwischen dem Wärmeübertragungselement und einem Abschlusselement eingeschlossen ist. Hierfür ist weiterhin vorzugsweise vorgesehen, dass das Abschlusselement eine geringere Wärmeleitfähigkeit als das Wärmeübertragungselement aufweist. Die Wärmeleitfähigkeit des Abschlusselements kann im Bereich von 0,02 bis 0,06 W/mK, vorzugsweise bei etwa 0,04 W/mK, liegen. Auch dieses Abschlusselement kann beispielsweise aus Keramikmaterial gebildet sein.To be able to exclude heat losses as much as possible, it is further proposed that the heating element between the heat transfer element and a closing element is included. For this purpose, it is further preferably provided that the closing element has a lower thermal conductivity than the heat transfer element. The thermal conductivity of the terminating element may be in the range of 0.02 to 0.06 W / mK, preferably about 0.04 W / mK. This closing element can also be formed, for example, of ceramic material.

Weiter betrifft die vorliegende Erfindung ein Fahrzeugheizgerät, bei dem eine erfindungsgemäße Brennkammeranordnung vorgesehen ist.Furthermore, the present invention relates to a vehicle heater, in which a combustion chamber arrangement according to the invention is provided.

Die vorliegende Erfindung wird nachfolgend mit Bezug auf die beiliegenden Zeichnungen detailliert beschrieben. Es zeigt:

Fig. 1
eine Längsschnittansicht eines Fahrzeugheizgeräts mit einer erfindungsgemäßen Brennkammeranordnung;
Fig. 2
eine Draufsicht bzw. Schnittansicht einer Heiz/Zünd-Einrichtung, geschnitten längs einer Linie II-II in Fig. 3;
Fig. 3
eine Längsschnittansicht der Heiz/Zünd-Einrichtung;
Fig. 4
eine Explosionsansicht der Heiz/Zünd-Einrichtung.
The present invention will be described below in detail with reference to the accompanying drawings. It shows:
Fig. 1
a longitudinal sectional view of a vehicle heater with a combustion chamber assembly according to the invention;
Fig. 2
a plan view and sectional view of a heating / ignition device, taken along a line II-II in Fig. 3 ;
Fig. 3
a longitudinal sectional view of the heating / ignition device;
Fig. 4
an exploded view of the heating / ignition device.

In Fig. 1 ist ein Fahrzeugheizgerät allgemein mit 10 bezeichnet. Ein derartiges Heizgerät 10 kann beispielsweise als Standheizung oder als Zuheizer in einem Fahrzeug eingesetzt werden. Das Heizgerät 10 umfasst eine Brennkammeranordnung 12, in der, wie im Folgenden noch beschrieben, durch Verbrennen eines Brennstoff/Luft-Gemisches Wärmeenergie bereitgestellt wird, sowie eine Wärmetauscheranordnung 14, in welcher diese bei der Verbrennung bereitgestellte und in den Verbrennungsabgasen transportierte Wärme auf ein zu erwärmendes Medidum, beispielsweise Luft oder auch die in einem Kühlsystem einer Brennkraftmaschine zirkulierende Kühlflüssigkeit, übertragen werden kann.In Fig. 1 For example, a vehicle heater is generally designated 10. Such a heater 10 can be used for example as a heater or as a heater in a vehicle. The heater 10 includes a combustor assembly 12 in which thermal energy is provided by burning a fuel / air mixture, as described below, and a heat exchanger assembly 14 in which it provides combustion and combustion exhaust gases Heat can be transmitted to a median to be heated, for example air or even the circulating in a cooling system of an internal combustion engine coolant.

Die Brennkammeranordnung 12 umfasst ein allgemein mit 16 bezeichnetes Brennkammergehäuse. Dieses Brennkammergehäuse 16 ist im Wesentlichen topfartig ausgebildet und begrenzt mit einer beispielsweise zylindrischen Umfangswandung 18 und einer mit dieser beispielsweise integral ausgestalteten Bodenwandung 20 eine in Richtung zur Wärmetauscheranordnung 14 hin offene Brennkammer 22. In der dargestellten Ausgestaltungsform sind in der Umfangswandung 18 mehrere Verbrennungsluft-Eintrittsöffnungen 24 ausgebildet, so dass die in einem Luftzuführraum 26 herangeförderte und symbolisch durch den Pfeil P1 angedeutete Verbrennungsluft in die Brennkammer 22 eingeleitet werden kann. Es sei darauf hingewiesen, dass der Luftzuführraum 26 durch das Brennkammergehäuse 16 und ein dieses umgebendes Luftführungsgehäuse 28 begrenzt sein kann. Die Verbrennungsluft wird in den Luftzuführraum 26 durch ein an sich bekanntes Luftfördergebläse, beispielsweise radial oder ggf. axial, bezogen auf eine Längsachse A der Brennkammeranordnung 12, gefördert.Combustor assembly 12 includes a combustor housing, generally designated 16. This combustion chamber housing 16 is essentially pot-shaped and delimited by a cylindrical circumferential wall 18 and a bottom wall 20, for example, integrally formed therewith a bottom wall 20 in the direction of the heat exchanger assembly 14 open combustion chamber in the illustrated embodiment are in the peripheral wall 18 more combustion air inlet openings 24th so that the combustion air supplied in an air supply space 26 and symbolically indicated by the arrow P 1 can be introduced into the combustion chamber 22. It should be noted that the air supply chamber 26 may be limited by the combustion chamber housing 16 and a surrounding air guide housing 28. The combustion air is in the air supply space 26 by a per se known air conveying blower, for example, radially or possibly axially, based on a longitudinal axis A of the combustion chamber assembly 12, promoted.

Die aus der Brennkammer 22 austretenden Verbrennungsabgase treten nach dem Durchströmen einer Flammblende 30 in ein Flammrohr 32 ein, das an seiner von der Brennkammer 22 abgewandten Seite axial offen ist. Das Flammrohr 32 ist von der ebenfalls im Wesentlichen topfartig ausgebildeten Wärmetauscheranordnung 12 bzw. einem inneren Wärmetäuschergehäuse 34 derselben umgeben. Zwischen diesem inneren Wärmetauschergehäuse 34 und dem Flammrohr 32 ist ein Verbrennungsabgasströmungsraum 36 gebildet, entlang welchem die Verbrennungsabgase in Richtung zur Brennkammeranordnung 12 zurück strömen und dann durch einen beispielsweise in dem Luftführungsgehäuse 28 gebildeten Auslass 38 zur Umgebung oder zu einem Abgasreinigungssystem abgegeben werden, wie durch einen Pfeil P2 angedeutet.The combustion exhaust gases leaving the combustion chamber 22, after flowing through a flame shutter 30, enter a flame tube 32, which is axially open on its side remote from the combustion chamber 22. The flame tube 32 is surrounded by the likewise substantially cup-shaped heat exchanger assembly 12 and an inner heat exchanger housing 34 thereof. Between this inner heat exchanger housing 34 and the flame tube 32, a combustion exhaust gas flow space 36 is formed, along which the combustion exhaust gases flow back towards the combustor 12 and then discharged through an outlet 38 formed, for example, in the air guide housing 28 to the environment or to an exhaust gas purification system, such as through a Arrow P 2 indicated.

Zwischen dem inneren Wärmetauschergehäuse 34 und einem äußeren Wärmetauschergehäuse 40 ist ein Strömungsraum 42 gebildet, der von dem zu erwärmenden Medium durchströmt wird. Dieses tritt im Bereich eines Einlasses 44 in die Wärmetauscheranordnung 14 ein und verlässt diese im Bereich eines Auslasses 46.Between the inner heat exchanger housing 34 and an outer heat exchanger housing 40, a flow space 42 is formed, which is flowed through by the medium to be heated. This occurs in the region of an inlet 44 in the heat exchanger assembly 14 and leaves it in the region of an outlet 46th

Es sei darauf hingewiesen, dass sowohl die Wärmetauscheranordnung 14 als auch die Brennkammeranordnung 12, so wie sie vorangehend beschrieben worden sind und in der Fig. 1 dargestellt sind, beispielhaft für eine Vielzahl verschiedener Abwandlungsmöglichkeiten stehen.It should be noted that both the heat exchanger assembly 14 and the combustion chamber assembly 12, as described above and in the Fig. 1 are shown as examples of a variety of different modification options.

An einer der Brennkammer 22 zugewandten Seite 48 der Bodenwandung 20 des Brennkammergehäuses 16 ist ein poröses Verdampfermedium 50 vorgesehen. Dieses poröse Verdampfermedium, das beispielsweise aus Schaumkeramik, Vliesmaterial, Geflechtmaterial oder dergleichen gebildet sein kann, bedeckt vorzugsweise die gesamte Oberfläche der Seite 48 der Bodenwandung 20. In der Bodenwandung 20 ist eine Durchtrittsöffnung für eine Brennstoffleitung 52 gebildet, die direkt zum Verdampfermedium 50 führt, so dass Brennstoff, wie durch einen Pfeil P3 angedeutet, in das poröse Verdampfermedium 50 eingeleitet werden kann. Es sei hier darauf hingewiesen, dass selbstverständlich auch an mehreren Bereichen der Bodenwandung 20 derartige Brennstoffleitungen 52 zum porösen Verdampfermedium 50 führen können. Weiterhin ist es selbstverständlich auch möglich, an der Innenseite der Umfangswandung 18 zumindest bereichsweise poröses Verdampfermedium vorzusehen, in welches dann entweder über das poröse Verdampfermedium 50 oder über separate Brennstoffleitungen flüssiger Brennstoff eingespeist werden kann.On a combustion chamber 22 side facing 48 of the bottom wall 20 of the combustion chamber housing 16, a porous evaporator medium 50 is provided. This porous evaporator medium, which can be formed, for example, from ceramic foam, nonwoven material, mesh material or the like, preferably covers the entire surface of the side 48 of the bottom wall 20. In the bottom wall 20, a passage opening for a fuel line 52 is formed, which leads directly to the evaporator medium 50, so that fuel, as indicated by an arrow P 3 , can be introduced into the porous evaporator medium 50. It should be noted here that, of course, such fuel lines 52 can also lead to the porous evaporator medium 50 at a plurality of regions of the bottom wall 20. Furthermore, it is of course also possible to provide on the inside of the circumferential wall 18 at least partially porous evaporator medium, in which then liquid fuel can either be fed via the porous evaporator medium 50 or via separate fuel lines.

An der von der Brennkammer 22 abgewandten Seite 54 der Bodenwandung 20 ist eine allgemein mit 56 bezeichnete Heiz/Zünd-Einrichtung vorgesehen. Diese umfasst, wie in den Fig. 2 bis 4 detaillierter zu erkennen, ein plattenartig ausgestaltetes Wärmeübertragungselement 58, das an seiner der Seite 54 der Bodenwandung 20 zugewandten Seite 60 über ein Zwischenelement 82 mit der Bodenwandung 20 in Wärmeübertragungskontakt steht und an seiner von der Bodenwandung 20 abgewandten Seite 62 eine ring- bzw. spiralartige Einsenkungsanordnung 64 aufweist. In dieser ist ein als Heizspirale oder Heizwendel oder dergleichen ausgebildetetes elektrisch erregbares Heizelement 66 im Wesentlichen so aufgenommen, dass es an der Seite 62 nicht über das Wärmeübertragungselement 58 hervorsteht. Das elektrisch erregbare Heizelement 66 ist an der Seite 62 weiterhin durch ein mit dem Heizelement 58 in Kontakt stehendes bzw. damit verbundenes Abdeckelement 68 überdeckt, so dass es im Wesentlichen, bis auf elektrische Zuführbereiche, zwischen diesem Abdeckelement 68 und dem Wärmeübertragungselement 58 eingeschlossen ist. Das Wärmeübertragungselement 58 weist eine im Wesentlichen ringartige Konfiguration auf, und in dem Abdeckelement 68 ist für die oder jede Leitung 52 eine auch in Form eines Stutzens 72 ausgestaltete Öffnung 70 vorhanden, so dass einerseits das Wärmeübertragungselement 58 auch im Bereich dieser Öffnung 70 durch den stutzenartigen Abschnitt 72 des Abdeckelements 68 überdeckt ist und andererseits eine Trennung zwischen diesem Wärmeübertragungselement 58 und der Leitung 52 hergestellt werden kann. Am Außenumfangsbereich weist das Abdeckelement 68 einen zylindrischen bzw. stutzenartigen Vorsprung 74 auf, der das Wärmeübertragungselement 58 nach außen hin abdeckt. Auch das plattenartige Zwischenelement 82 weist in Zuordnung zu der oder jeder Leitung 52 eine Öffnung 84 auf, die ebenfalls in einem im Wesentlichen stutzenartig ausgestalteten Ansatz 86 gebildet ist. Zusammen mit dem stutzenartigen Abschnitt 72 des Abdeckelements 68 schließt somit dieser Stutzen 86 das Wärmeübertragungselement 58 nach radial innen hin bezüglich einer Brennstoffleitung 52 thermisch ab.At the side facing away from the combustion chamber 22 side 54 of the bottom wall 20 is a generally designated 56 heating / ignition device is provided. This includes, as in the Fig. 2 to 4 To recognize in more detail, a plate-like designed heat transfer element 58, the its side 54 facing the bottom wall 20 side 60 is in heat transfer contact via an intermediate element 82 with the bottom wall 20 and on its side facing away from the bottom wall 20 side 62 has a ring or spiral-like Einsenkungsanordnung 64. In this, an electrically energizable heating element 66 designed as a heating coil or heating coil or the like is substantially accommodated in such a way that it does not project beyond the heat transfer element 58 on the side 62. The electrically energizable heating element 66 is further covered on the side 62 by a covering element 68 that is in contact with or connected to the heating element 58, so that it is essentially enclosed between this covering element 68 and the heat transfer element 58, with the exception of electrical supply regions. The heat transfer element 58 has a substantially ring-like configuration, and in the cover 68 is provided for the or each line 52 an opening 70 designed in the form of a nozzle 72, so that on the one hand the heat transfer element 58 in the region of this opening 70 through the nozzle-like Section 72 of the cover 68 is covered and on the other hand, a separation between this heat transfer element 58 and the line 52 can be made. At the outer peripheral portion, the cover member 68 has a cylindrical projection-like projection 74 which covers the heat transfer member 58 toward the outside. The plate-like intermediate element 82 also has, in association with the or each line 52, an opening 84, which is likewise formed in a substantially neck-like projection 86. Thus, together with the nozzle-like portion 72 of the cover 68, this nozzle 86 thermally closes off the heat transfer element 58 radially inward with respect to a fuel line 52.

Wie man in Fig. 1 erkennt, ergibt sich somit eine Konfiguration, bei welcher das Wärmeübertragungselement 58 lediglich in Wärmeübertragungskontakt mit dem Zwischenelement 85 und über dieses und die Bodenwandung 20 mit dem porösen Verdampfermedium 50 ist, während sowohl zur Brennstoffleitung 52 als auch zu einem über die Bodenwandung 20 hinaus verlängerten Abschnitt 75 der Umfangswandung 18 des Brennkammergehäuses 16 ein direkter Kontakt zwischen dem Wärmeübertragungselement 58 und anderen Komponenten nicht vorhanden ist. Das Abdeckelement 68 ist dabei vorzugsweise aus gut thermisch isolierendem Material, wie z. B. Keramikmaterial oder dergleichen, aufgebaut. Es wird somit sichergestellt, dass die im Bereich des Heizelements 60 durch elektrische Erregung desselben erzeugte Wärme im Wesentlichen vollständig und ohne größere Wärmeverluste in das Verdampfermedium 50 bzw. die Brennkammer 22 eingeleitet wird.How to get in Fig. 1 Thus, a configuration results in which the heat transfer element 58 only in heat transfer contact with the intermediate element 85 and through this and the bottom wall 20th with the porous evaporator medium 50, while both to the fuel line 52 and to a beyond the bottom wall 20 also extended portion 75 of the peripheral wall 18 of the combustion chamber housing 16, a direct contact between the heat transfer member 58 and other components is not present. The cover 68 is preferably made of good thermal insulating material such. As ceramic material or the like. It is thus ensured that the heat generated in the region of the heating element 60 by electrical excitation thereof is introduced into the evaporator medium 50 or the combustion chamber 22 substantially completely and without major heat losses.

Um die gewünschten Wärmeübertragungsbedingungen bereitstellen zu können, ist es vorteilhaft, das Wärmeübertragungselement 58 aus gut thermisch leitendem Material herzustellen. Hier hat sich spezielles Keramikmaterial, wie z. B. Aluminiumnitrid, Siliziumnitrid oder Siliziumcarbid, als besonders vorteilhaft erwiesen, das eine spezifische Wärmeleitfähigkeit aufweist, die im Bereich von 30 bis 180 W/mK liegt und somit wesentlich höher sein kann, als die Wärmeleitfähigkeit von Metallmaterial, wie z. B. Stahl. Weiterhin hat dieses Material auch einen ausreichend hohen spezifischen elektrischen Widerstand im Bereich von beispielsweise 1012 - 1014Ωcm, so dass gleichermaßen eine gute elektrische Isolation zwischen dem Heizelement 60 und dem im Allgemeinen aus Metall, beispielsweise Aluminium oder Stahlmaterial, hergestellten Brennkammergehäuse 16 bereitgestellt ist.In order to be able to provide the desired heat transfer conditions, it is advantageous to produce the heat transfer element 58 from a good thermally conductive material. Here is special ceramic material such. For example, aluminum nitride, silicon nitride or silicon carbide, proved to be particularly advantageous, which has a specific thermal conductivity, which is in the range of 30 to 180 W / mK and thus can be substantially higher than the thermal conductivity of metal material such. Steel. Furthermore, this material also has a sufficiently high resistivity in the range, for example, 10 12 - 10 14 Ωcm, so that equally good electrical insulation between the heating element 60 and the combustion chamber housing 16 generally made of metal, such as aluminum or steel material, is provided ,

Man erkennt vor allem in Fig. 1, dass in dem Zwischenelement 82, der Bodenwandung 20 des Brennkammergehäuses 16 und dem porösen Verdampfermedium 50 zueinander ausgerichtete Öffnungen 88, 76, 78 gebildet sind. Ein an dem Wärmeübertragungselement 58 gebildeter und über dessen der Brennkammer 22 zugewandt zu positionierenden Seite 60 vorstehender Zündvorsprung 80 durchsetzt bei am Brennkammergehäuse 16 getragener Heiz/Zünd-Einrichtung 56 diese Öffnungen 88, 76, 78. Vorzugsweise sind die Abmessung bzw. Formgebung dieser Öffnungen 88, 76, 78 so auf die Formgebung des Zündvorsprungs 80 abgestimmt, dass der Zündvorsprung 80 weder mit dem Zwischenelement 82 noch mit der Bodenwandung 20 noch mit dem porösen Verdampfermedium 50 in direktem Wärmeübertragungskontakt steht. Durch die Öffnungen 88, 76, 78 hindurch greift der Zündvorsprung 80 geringfügig in die Brennkammer 72 ein. Bei Erregung des Heizelements 66 wird somit durch die gute Wärmeleitfähigkeit des Wärmeübertragungselements 58 dafür gesorgt, dass im Bereich des Zündvorsprungs 78 in der Brennkammer 22 die zum Zünden des durch Brennstoffabdampfung und durch Verbrennungslufteinspeisung gebildeten zündfähigen Gemisches erforderliche hohe Temperatur bereitgestellt wird. Hier ist von besonderem Vorteil, dass dieser Zündvorsprung 80 sich sehr nahe an dem porösen Verdampfermedium 50 erstreckt, so dass insbesondere in der nahen Umgebung dieses Zündvorsprungs 80 eine stark mit verdampftem Brennstoff angereicherte Atmosphäre bereigestellt werden kann. Insbesondere ist in dem im Wesentlichen ringartigen Zwischenraum zwischen dem Zündvorsprung 80 und dem porösen Verdampfermedium 50 eine derartige zu einer guten Zündcharakteristik führende Atmosphäre bereitgestellt, so dass es nicht zwingend erforderlich ist, den Zündvorsprung 80 so lange auszugestalten, dass er, wie dies in der Fig. 1 erkennbar ist, bis in die Brennkammer 22 reicht. Alleine durch das Hineinerstrecken in den Bereich der Öffnung 78 des porösen Verdampfermediums 50, welche Öffnung 78 zur Brennkammer 22 hin offen ist, kann es möglich sein, durch die Erzeugung lokal hoher Temperaturen und die Bereitstellung einer zum Zünden günstigen Atmosphäse das Heizgerät 10 bzw. die Brennanordnung 12 desselben bereits nach kurzer Vorerwärmungsphase zu zünden.One recognizes especially in Fig. 1 in that openings 88, 76, 78 aligned with one another in the intermediate element 82, the bottom wall 20 of the combustion-chamber housing 16 and the porous evaporator medium 50 are formed. An educated on the heat transfer element 58 and facing the combustion chamber 22 to be positioned side 60 projecting Zündvorsprung 80 passes through at the combustion chamber housing 16 worn heater / igniter 56 these openings 88, 76, 78. Preferably, the dimension or shape of these openings 88, 76, 78 matched to the shape of the Zündvorsprungs 80 that the Zündvorsprung 80 with neither the intermediate element 82 nor with the bottom wall 20 is still in direct heat transfer contact with the porous evaporator medium 50. Through the openings 88, 76, 78 through the Zündvorsprung 80 engages slightly into the combustion chamber 72 a. When the heating element 66 is energized, the good thermal conductivity of the heat transfer element 58 ensures that the high temperature required to ignite the ignitable mixture formed by fuel evaporation and combustion air feed is provided in the region of the ignition projection 78 in the combustion chamber 22. Here it is of particular advantage that this firing projection 80 extends very close to the porous evaporator medium 50, so that in particular in the immediate vicinity of this Zündvorsprungs 80 can be gereigestellt a highly enriched with vaporized fuel atmosphere. In particular, in the substantially ring-like intermediate space between the ignition projection 80 and the porous evaporator medium 50, such an atmosphere leading to a good ignition characteristic is provided, so that it is not absolutely necessary to design the ignition projection 80 so long that, as described in US Pat Fig. 1 is recognizable, extends into the combustion chamber 22. Alone by the Hineinerstrecken in the region of the opening 78 of the porous evaporator medium 50, which opening 78 is open to the combustion chamber 22, it may be possible by the generation of locally high temperatures and the provision of a favorable atmosphere for igniting the heater 10 and Firing arrangement 12 of the same after a short preheating phase to ignite.

Um diese Temperaturen erzeugen zu können, kann es erforderlich sein, das Heizelement 66 vergleichsweise stark zu erregen, so dass in dem Wärmeübertragungselement 58 nicht nur im Bereich des Zündvorsprungs 80, sondern auch in den anderen zur Wärmeübertragung in das poröse Verdampfermedium 50 dienenden Bereichen sehr hohe Temperaturen enstehen. Um zu vermeiden, dass das poröse Verdampfermedium 50 mit derartig hohen Temperaturen beaufschlagt wird, ist das vorangehend bereits angesprochene Zwischenelement 82 vorgesehen, das dafür sorgt, dass zwar im Bereich eines jeweiligen Zündvorsprungs 80 diese hohen Temperaturen im Wärmeübertragungselement 58 unmittelbar genutzt werden können, während in den anderen zur Erwärmung des porösen Verdampfermediums 50 dieneden Bereiche durch zusätzliches Einfügen eines Wärmeleitendwiderstands ein verminderter Wärmeübertrag stattfinden wird. Hierzu kann das Zwischenelement 82 beispielsweise aus einer so genannten Isolierkeramik aufgebaut sein, die eine Wärmeleitfähigkeit bzw. spezifische Wärmeleitfähigkeit im Bereich von 0,3 W/mK aufweist. Im Handel sind derartige Wärmedämmstoffe, die hochtemperaturfest sind, z. B. unter der registrierten Marke PROMAFELD 9 erhältlich. Durch das Einfügen dieses Zwischenelements 82 wird also die zum Zünden einerseits und Erwärmen des porösen Verdampfermediums 50 andererseits erforderliche Temperaturabstufung erreicht. Insbesondere kann durch Auswahl des Materials bzw. auch der Dicke des Zwischenelements 82 hier definiert vorgegeben werden, wie groß der Wärmeleitwiderstand bei der Wärmeübertragung zum porösen Verdampfermedium 50 ist und somit welcher Anteil der Wärme in dieses poröse Verdampfermedium einerseits und den zum Vorsprung 80 andererseits übertragen wird.In order to be able to generate these temperatures, it may be necessary to energize the heating element 66 comparatively strongly, so that not only in the area of the ignition projection 80 in the heat transfer element 58, but also in the other serving for heat transfer into the porous evaporator medium 50 areas very high temperatures arise. In order to avoid that the porous evaporator medium 50 is subjected to such high temperatures, the above-mentioned intermediate element 82 is provided, which ensures that in the region of a respective Zündvorsprungs 80, these high temperatures in the heat transfer element 58 can be used directly while in the other, for the purpose of heating the porous evaporator medium 50, a reduced heat transfer will take place by additionally inserting a heat conduction resistance. For this purpose, the intermediate element 82 may be constructed, for example, of a so-called insulating ceramic, which has a thermal conductivity or specific thermal conductivity in the range of 0.3 W / mK. In the trade are such thermal insulation materials that are resistant to high temperatures, eg. Available under the registered trademark PROMAFELD 9. By inserting this intermediate element 82, therefore, the temperature gradation required for igniting, on the one hand, and heating the porous evaporator medium 50, on the other hand, is achieved. In particular, by selecting the material or also the thickness of the intermediate element 82, it can be predetermined here how large the heat conduction resistance is during heat transfer to the porous evaporator medium 50 and thus what proportion of the heat is transferred to this porous evaporator medium on the one hand and to the projection 80 on the other hand ,

Es sei darauf hingewiesen, dass selbstverständlich bei der erfindungsgemäß vorzusehenden Heiz/Zünd-Einrichtung 56 mehrere Zündvorsprünge 80 vorgesehen sein können, um verteilt über den Bereich der Bodenwandung 20 mehrere Bereiche bereitzustellen, in welchen dann die Zündung aufreten wird, so dass vom Beginn der Verbrennung an bereits eine sehr gleichmäßige Verteilung der Verbrennung in der Brennkammer 22 erlangt werden kann. Ferner kann das Heizelement 66 derart betrieben werden, dass es zunächst am Beginn der Startphase stärker erregt wird, also stärker erwärmt wird, um im Bereich des Zündvorsprungs 80 die erfordrelich hohen Temperaturen bereitstellen zu können, und dann, wenn die Verbrennung gestartet worden ist, mit geringerer Heizleistung betrieben wird, so dass im Wesentlichen nur noch die Brennstoffabdampfung verstärkt unterstützt wird, sofern dies erforderlich ist. Hier kann beispielsweise ein herkömmlicher Heizdraht, z. B. Kanthal, eingesetzt werden, der eine Heizleistung von etwa 250 W bereitstellen kann.It should be pointed out that, of course, in the case of the heating / ignition device 56 to be provided according to the invention, a plurality of ignition projections 80 can be provided in order to provide a plurality of regions distributed over the region of the bottom wall 20, in which case the ignition will then start, so that from the beginning of the combustion already a very uniform distribution of combustion in the combustion chamber 22 can be obtained. Furthermore, the heating element 66 can be operated in such a way that it is initially more strongly excited at the start of the starting phase, that is, it heats up more to provide the high temperatures required in the region of the ignition projection 80, and then, when the combustion has been started, operated with lower heating power, so that substantially only the fuel evaporation is increasingly supported, if necessary. Here, for example, a conventional heating wire, z. Kanthal, which can provide a heating power of about 250W.

Auch kann das vorangehend angesprochene Zwischenelement 82 bzw. dessen Funktion der zusätzlichen Wärmeübertragungsbarriere durch die Bodenwandung 20 des Brennkammergehäuses 16 selbst übernommen werden, wenn das Brennkammergehäuse 16 oder zumindest die Bodenwandung 20 desselben aus einem Material aufgebaut ist, das eine entsprechende Wärmeübertragungsbarriere erzeugt. Ein erschwerter Wärmeübertrag zwischen dem Wärmeübertragungselement 58 und der Bodenwandung 20 des Brennkammergehäuses 16 kann auch durch Oberflächenstrukturierung im Bereich zumindest einer Oberfläche dieser beiden Bauteile erlangt werden, so dass bei entsprechend aufgerauter, gerippter oder in sonstiger Weise strukturierter Oberfläche die Gesamtkontaktierungsfläche dieser beiden Bauteile verringert wird und ein entsprechend verminderter Wärmeübertrag vom Wärmeübertragungselement 58 auf die Bodenwandung 20 des Brennkammergehäuses 16 die Folge sein wird. Auch ist es grundsätzlich denkbar, das zwischen dem Wärmeübertragungselement und dem porösen Verdampfermedium vorgesehene Zwischenelement dann, wenn dieses nicht durch die Bodenwandung 20 selbst gebildet ist, zwischen der Bodenwandung 20 und dem porösen Verdampfermedium 50 anzuordnen.The above-mentioned intermediate element 82 or its function of the additional heat transfer barrier can also be taken over by the bottom wall 20 of the combustion chamber housing 16 itself if the combustion chamber housing 16 or at least the bottom wall 20 thereof is constructed of a material which generates a corresponding heat transfer barrier. Difficult heat transfer between the heat transfer element 58 and the bottom wall 20 of the combustion chamber housing 16 can also be achieved by surface structuring in the region of at least one surface of these two components, so that with corresponding roughened, ribbed or otherwise structured surface, the total contact surface of these two components is reduced and a correspondingly reduced heat transfer from the heat transfer element 58 to the bottom wall 20 of the combustion chamber housing 16 will be the result. It is also conceivable, in principle, to arrange the intermediate element provided between the heat transfer element and the porous evaporator medium, if this is not formed by the bottom wall 20 itself, between the bottom wall 20 and the porous evaporator medium 50.

Weiterhin sei darauf hingewiesen, dass die erfindungsgemäß vorzusehende Heiz/Zünd-Einrichtung 56 auch dann bereitgestellt werden kann, wenn im Bereich der Bodenwandung 20 des Brennkammergehäuses 16 ein Verbrennungslufteintrittsstutzen gebildet ist, so dass die Verbrennungsluft im Wesentlichen von radial innen her in die Brennkammer 22 einströmen kann oder zusätzlich von radial innen in die Brennkammer 22 einströmen kann. Weiterhin ist es selbstverständlich auch möglich, die erfindungsgemäße Anordnung so auszugestalten, dass sie nicht oder nicht nur an der Bodenkammer 20 des Brennkammergehäuses 16 positioniert ist, sondern beispielsweise auch im Bereich der Umfangswandung 18 positioniert ist. Weiterhin ist es grundsätzlich auch denkbar, die Heiz/Zünd-Einrichtung an der der Brennkammer 22 zugewandten Seite 48 der Bodenwandung 20 vorzusehen, also zwischen der Bodenwandung 20 und dem porösen Verdampfermedium 50, wenn dies aus Gründen der verbesserten Wärmeübertragung in das poröse Verdampfermedium 50 vorteilhaft ist.It should also be pointed out that the heating / ignition device 56 to be provided according to the invention can also be provided if a combustion air inlet connection is formed in the region of the bottom wall 20 of the combustion chamber housing 16, so that the combustion air flows in Substantially from the inside radially into the combustion chamber 22 can flow or can additionally flow from radially inward into the combustion chamber 22. Furthermore, it is of course also possible to design the arrangement according to the invention such that it is not or not only positioned on the bottom chamber 20 of the combustion chamber housing 16, but is for example also positioned in the region of the peripheral wall 18. Furthermore, it is basically also conceivable to provide the heating / ignition device on the combustion chamber 22 facing side 48 of the bottom wall 20, ie between the bottom wall 20 and the porous evaporator medium 50, if advantageous for reasons of improved heat transfer into the porous evaporator medium 50 is.

Claims (19)

  1. A combustion chamber arrangement for a vaporizing burner, in particular for a vehicle heating device, comprising a combustion chamber housing (16) defining a combustion chamber (22) and a heater/ignition device (56) provided in the area of a wall (20) of the combustion chamber housing (16), comprising an electrically excitable heating element (66) and a heat transmission element (58) being in heat transmission contact with the heating element (66), characterized in the heat transmission element (58) comprising at least one ignition projection (80) projecting towards the combustion chamber (22).
  2. A combustion chamber arrangement according to claim 1, characterized in a porous vaporizing medium (50) being provided at a side (60) of the heat transmission element (58) which is facing the combustion chamber (22), and in the at least one ignition projection (80) engaging a recess (78) in the vaporizing medium (50).
  3. A combustion chamber arrangement according to claim 2, characterized in the recess (78) being open towards the combustion chamber (22).
  4. A combustion chamber arrangement according to claim 3, characterized in the at least one ignition projection (80) projecting beyond the vaporizing medium (50) into the combustion chamber (22).
  5. A combustion chamber arrangement according to one of claims 1 to 4, characterized in the heat transmission element (58) being arranged at a side (54) of the wall (20) of the combustion chamber housing (16) opposite the combustion chamber (22) and in the at least one ignition projection (80) extending through an opening (76) formed in the wall (20).
  6. A combustion chamber arrangement according to claim 2 or one of claims 3 to 5, if related to claim 2, characterized in an intermediate element (82) with a lower thermal conductivity than that of the heat transmission element (58) being arranged between the heat transmission element (58) and the vaporizing medium (50).
  7. A combustion chamber arrangement according to claim 6, characterized in the at least one ignition projection (80) extending through an opening (88) formed in the intermediate element (82).
  8. A combustion chamber arrangement according to claim 6 or claim 7, characterized in the intermediate element (82) having a thermal conductivity in the range of 0.1 to 0.5 W/mK, preferably about 0.3 W/mK.
  9. A combustion chamber arrangement according to one of claims 6 to 8, characterized in the intermediate element (82) being made of a ceramic material.
  10. A combustion chamber arrangement according to one of claims 1 to 9, characterized in the wall (20) being a bottom wall (20) of the combustion chamber housing (16).
  11. A combustion chamber arrangement according to one of claims 1 to 10, characterized in the heat transmission element (58) having a thermal conductivity in the range of 30 to 200 W/mK, preferably 100 to 180 W/mK.
  12. A combustion chamber arrangement according to one of claims 1 to 8, characterized in the heat transmission element (58) having a specific electrical resistance of at least 1011 Ωcm, preferably at least 1014 Ωcm.
  13. A combustion chamber arrangement according to one of claims 1 to 12, characterized in the heat transmission element (58) being made of a ceramic material, preferably aluminium nitride, silicium nitride or silicium carbide.
  14. A combustion chamber arrangement according to one of claims 1 to 13, characterized in a depression arrangement (64) being provided in the heat transmission element (58), in which the heating element (66) may be at least partially received.
  15. A combustion chamber arrangement according to one of claims 1 to 11, characterized in the heating element (66) being enclosed between the heat transmission element (58) and an end element (68).
  16. A combustion chamber arrangement according to claim 15, characterized in the end element (68) having a lower thermal conductivity than the heat transmission element (58).
  17. A combustion chamber arrangement according to claim 15 or 16, characterized in the end element (68) having a thermal conductivity in the range of 0.02 to 0.06 W/mK, preferably about 0.04 W/mK.
  18. A combustion chamber arrangement according to one of claims 15 to 17, characterized in the end element (68) being made of a ceramic material.
  19. A vehicle heating device, comprising a combustion chamber arrangement (12) according to one of the preceding claims.
EP20040013162 2003-06-05 2004-06-03 Combustion chamber for a vaporizing burner, particularly for an automotive heater Expired - Fee Related EP1484552B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10325574 2003-06-05
DE2003125574 DE10325574A1 (en) 2003-06-05 2003-06-05 Combustion chamber arrangement for an evaporator burner, in particular for a vehicle heater

Publications (2)

Publication Number Publication Date
EP1484552A1 EP1484552A1 (en) 2004-12-08
EP1484552B1 true EP1484552B1 (en) 2009-05-27

Family

ID=33154567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040013162 Expired - Fee Related EP1484552B1 (en) 2003-06-05 2004-06-03 Combustion chamber for a vaporizing burner, particularly for an automotive heater

Country Status (3)

Country Link
EP (1) EP1484552B1 (en)
JP (1) JP2004361070A (en)
DE (2) DE10325574A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10360009A1 (en) * 2003-12-19 2005-07-28 J. Eberspächer GmbH & Co. KG Fuel supply line system in a heater, in particular vehicle heater
DE102004020129B3 (en) 2004-04-26 2005-08-25 J. Eberspächer GmbH & Co. KG Evaporator set-up e.g. for fuel powered heater in motor vehicles, has porous evaporator medium and liquid fuel line arrangement leading to porous evaporator medium with heating mechanism at back of porous evaporator medium positioned away
DE102005003653A1 (en) 2005-01-26 2006-08-03 J. Eberspächer GmbH & Co. KG Evaporator arrangement for e.g. vehicle heating device or reformer has evaporator medium and heating element carried in the carrier whereby heating element is materially connected to the carrier
CN100458281C (en) * 2006-07-05 2009-02-04 山东大学 Evaporation mixing combustion mode for liquid fuel and combustion chamber therefor
FR2905164B1 (en) * 2006-08-23 2012-12-21 Prod Berger SILICON CARBIDE COMPOSITION FOR CATALYTIC COMBUSTION BURNER IN POROUS MATERIAL.
FR2905165B1 (en) * 2006-08-23 2008-10-10 Prod Berger Soc Par Actions Si CATALYTIC COMBUSTION BURNER HAVING A PARTICULAR BIT AND BOTTLE EQUIPPED WITH SUCH A BURNER.
DE102007053488A1 (en) 2007-11-09 2009-05-14 J. Eberspächer GmbH & Co. KG Evaporator assembly, in particular for an evaporator burner of a vehicle heater, and method for its preparation
DE102009026266B4 (en) * 2009-07-29 2016-01-28 Webasto Ag Mobile heater
DE102011077891B3 (en) * 2011-06-21 2012-12-06 J. Eberspächer GmbH & Co. KG Evaporator assembly, in particular for a vehicle heater
DE102013220653B4 (en) * 2013-10-14 2019-12-05 Eberspächer Climate Control Systems GmbH & Co. KG Combustion chamber assembly, in particular for an evaporator burner
DE102013220655B4 (en) * 2013-10-14 2016-01-14 Eberspächer Climate Control Systems GmbH & Co. KG Floor assembly for a combustion chamber assembly of an evaporator burner
DE102018111636A1 (en) * 2018-05-15 2019-11-21 Webasto SE Evaporator assembly for mobile heaters

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403972A1 (en) * 1984-02-04 1985-08-08 Webasto-Werk W. Baier GmbH & Co, 8035 Gauting EVAPORATOR BURNER
DE9210029U1 (en) * 1992-07-25 1992-09-24 Webasto Thermosysteme GmbH, 8035 Stockdorf Evaporation burner for a liquid fuel heating device
DE4442425B4 (en) * 1994-05-13 2004-09-16 J. Eberspächer GmbH & Co. KG Combustion chamber of a burner for a vehicle heater or for an exhaust gas particle filter
JP3792116B2 (en) * 2000-04-27 2006-07-05 株式会社デンソー Combustion heater
US6726114B2 (en) * 2001-06-26 2004-04-27 J. Eberspacher Gmbh & Co., Kg Evaporative burner
DE10130638A1 (en) * 2001-06-26 2003-01-02 Eberspaecher J Gmbh & Co Vaporizer burner used in heating devices of motor vehicles comprises an ignition heating element igniting fuel vapor, and a vaporizer heating element influencing the vaporizing characteristics of a vaporizer medium
DE10251438C5 (en) * 2002-11-05 2009-06-18 J. Eberspächer GmbH & Co. KG Evaporator burner, especially for a heater

Also Published As

Publication number Publication date
EP1484552A1 (en) 2004-12-08
JP2004361070A (en) 2004-12-24
DE10325574A1 (en) 2004-12-30
DE502004009519D1 (en) 2009-07-09

Similar Documents

Publication Publication Date Title
EP1275901B1 (en) Vaporizing burner
EP1484552B1 (en) Combustion chamber for a vaporizing burner, particularly for an automotive heater
EP2705299B1 (en) Evaporator burner for a mobile heating unit
EP1860379B1 (en) Vaporiser component, in particular for a vehicle heating device or a reformer assembly for a fuel cell system
EP1574782A2 (en) Vaporizing Burner, in particular for a Car Heater
EP3296632A1 (en) Combustion chamber module for a fuel-powered vehicle heating device
DE3918663A1 (en) FUEL PREHEATING ARRANGEMENT FOR AN ULTRASONIC SPRAYER FOR HEATER
DE10004507A1 (en) Vehicle heating system operating independently of engine includes glow body fixed in pipe between burner chamber and fuel supply to vaporise and ignite fuel during start phase of heater
EP1686317B1 (en) Combustion chamber system for a vehicle heater
EP1363070B1 (en) Vaporizing burner and method for removing desposits in a vaporizing burner
DE10160655C2 (en) Combustion chamber assembly for a heater
DE10200524C5 (en) Combustor assembly, in particular for a vehicle heater
EP0309723B1 (en) Ignition burner in a device for burning solid particles in the exhaust gas of internal combustion engines
DE2459423A1 (en) USE FOR THE FORMATION OF AN AUXILIARY CHAMBER IN THE COMBUSTION ROOM OF A COMBUSTION POWER MACHINE AND PROCESS FOR ITS PREHEATING
DE10136292A1 (en) Vaporizer burner used in heating devices of motor vehicles comprises an ignition heating element igniting fuel vapor, and a vaporizer heating element influencing the vaporizing characteristics of a vaporizer medium
EP1788305B1 (en) Combustion chamber assembly for an evaporation burner
DE3243398A1 (en) GASIFICATION BURNER FOR LIQUID FUEL
DE19546130C2 (en) Evaporation burner of an engine independent vehicle heater
DE10209967C5 (en) Evaporator element for an evaporator burner
EP3848212A1 (en) Vehicle heating device and method of operating the same
EP1927489B1 (en) Vehicle heating device
DE10211929A1 (en) Combustor with introduction of non-combustion air
EP1568525B1 (en) Heating device for a combustion chamber with locally variing heating power
EP2012058A2 (en) Vehicle heating device
EP1837595A1 (en) Ignition module for a combustion chamber assembly of a vehicle heater

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20041129

AKX Designation fees paid

Designated state(s): CZ DE FR GB SE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CZ DE FR GB SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 502004009519

Country of ref document: DE

Date of ref document: 20090709

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20090618

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090623

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100302

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100603

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100604

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004009519

Country of ref document: DE

Representative=s name: WEICKMANN & WEICKMANN, DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20090630

Year of fee payment: 6

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502004009519

Country of ref document: DE

Owner name: EBERSPAECHER CLIMATE CONTROL SYSTEMS GMBH & CO, DE

Free format text: FORMER OWNER: J. EBERSPAECHER GMBH & CO. KG, 73730 ESSLINGEN, DE

Effective date: 20130607

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004009519

Country of ref document: DE

Representative=s name: WEICKMANN & WEICKMANN, DE

Effective date: 20130607

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004009519

Country of ref document: DE

Representative=s name: RUTTENSPERGER LACHNIT TROSSIN GOMOLL PATENT- U, DE

Effective date: 20130607

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004009519

Country of ref document: DE

Representative=s name: RUTTENSPERGER LACHNIT TROSSIN GOMOLL PATENT- U, DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150630

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004009519

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170103