EP1830128B1 - Burner wall structure - Google Patents
Burner wall structure Download PDFInfo
- Publication number
- EP1830128B1 EP1830128B1 EP07102766A EP07102766A EP1830128B1 EP 1830128 B1 EP1830128 B1 EP 1830128B1 EP 07102766 A EP07102766 A EP 07102766A EP 07102766 A EP07102766 A EP 07102766A EP 1830128 B1 EP1830128 B1 EP 1830128B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall structure
- combustion chamber
- lower plate
- plate
- openings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002485 combustion reaction Methods 0.000 claims description 67
- 239000007789 gas Substances 0.000 claims description 27
- 239000000446 fuel Substances 0.000 claims description 17
- 238000005476 soldering Methods 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 claims 2
- 229910000679 solder Inorganic materials 0.000 description 15
- 239000000203 mixture Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
Definitions
- the present invention relates to a wall structure for confining a combustion chamber of a burner, having the features of the preamble of claim 1.
- the present invention also relates to a burner equipped with such a wall structure, and to an associated operating method.
- a wall structure for limiting a combustion chamber of a burner which comprises an upper plate exposed to the combustion chamber and a lower plate, which abuts against the top plate on a side facing away from the combustion chamber.
- the top plate and / or bottom plate are formed so that forms a channel system between the top plate and bottom plate, the top plate containing first openings communicating with the channel system, while the bottom plate has a plurality of second openings communicating with a feed space, which at a The side facing away from the combustion chamber side of the lower plate is arranged.
- the second openings penetrate not only the lower plate but also the upper plate, so that the feed space communicates through both plates with the combustion chamber.
- FIG DE 20 34 352 Another wall structure having a similar structure is shown in FIG DE 20 34 352 known.
- a gaseous oxidizer is burned with a gaseous fuel in a combustion reaction taking place in the combustion chamber.
- a gaseous fuel in a combustion reaction taking place in the combustion chamber.
- Such a burner may be used, for example, in a fuel cell to burn an anode-side hydrogen-product gas mixture and a cathode-side oxygen-product gas mixture in order to reduce unwanted hydrogen emissions of the fuel cell.
- a burner is for example from the DE 10 2004 033 545 the contents of which are hereby incorporated by express reference to the disclosure of the present invention.
- Essential for such a burner is that the oxidizing gas and the fuel gas are supplied to the combustion chamber separately, so that the highly reactive gases react with each other only in the combustion chamber.
- the Burner has a wall structure of the Burner, which limits the combustion chamber, at least on one side, first openings for supplying the gas and a separate second openings for supplying the second gas.
- the present invention is concerned with the problem of providing an improved embodiment for a wall structure or for a burner of the type mentioned, which is characterized in particular by a simplified manufacturability.
- the invention is based on the general idea of forming a top plate and a bottom plate so as to form the wall structure and to attach them to one another such that a channel system is formed between the plates.
- the upper plate facing the combustion chamber then contains first openings which connect the channel system to the combustion chamber in a communicative manner.
- the sub-plate in contact zones, in which the two plates abut against each other, second openings, which connect a channel separated from the feed system by third openings, which are formed in the top plate in the contact zones, communicating with the combustion chamber.
- the wall structure may have a lateral enclosure which laterally encloses the feed space and the channel system and in particular the plates. Through this enclosure channel system and feed chamber can be sealed and in particular connect a combustion chamber wall. With the enclosure, the wall structure forms a completely pre-assembled assembly, which simplifies the assembly of a torch equipped with the wall structure.
- the enclosure may be equipped with a first feed tube communicating with the channel system. Likewise, a second feed tube may be provided which communicates with the feed space.
- the wall structure can be produced particularly favorably by connecting the top plate to the bottom plate to form the channel system.
- a solder joint is suitable.
- the feed tubes can be attached to the enclosure, for example, again by a solder joint.
- a solder joint with a reduced soldering temperature is used in order not to endanger the solder joint between the upper and lower plate during soldering of the pipes.
- the various openings can be introduced separately in advance in the plates.
- Fig. 1 shows a wall structure 1 of a burner otherwise not shown, in which the wall structure 1 serves to limit a combustion chamber 2 of the burner. On one of the wall structure 1 opposite side of the combustion chamber 2 may be limited by a heat exchanger of the burner.
- the wall structure 1 comprises a top plate 3 and a bottom plate 4.
- the wall structure 1 also has a bottom plate 5, a skirt 6 and, for example, two feed tubes, namely a first feed tube 7 and a second feed tube 8.
- the top plate 3 is exposed to the combustion chamber 2.
- the lower plate 4 is largely arranged on a side facing away from the combustion chamber 2 side of the top plate 3 within the wall structure 1, in such a way that the lower plate 4 rests in contact zones 9 on the top plate 3.
- the shape of upper plate 3 and lower plate 4 is specifically chosen so that between the upper plate 3 and lower plate 4, a channel system 10 is formed.
- the lower plate 4 separates the channel system 10 from a feed space 11, which is formed on a side facing away from the combustion chamber 2 side of the lower plate 4 in the wall structure 1. Compared to the lower plate 4 said feed space 11 is limited by the bottom plate 5.
- the mount 6 peripherally encloses the upper plate 3, the channel system 10, the lower plate 4, the feed space 11 and the bottom plate 5.
- the enclosure 6 is provided with an upper step 28 into which the top plate 3 can be inserted.
- the enclosure 6 expediently also has a lower step 29 into which the base plate 5 can be inserted.
- the top plate 3 includes first openings 12 which penetrate the top plate 3 and which connect the combustion chamber 2 communicating directly with the channel system 10.
- the lower plate 4 has areas 22 with second openings 13, which penetrate the lower plate 4 and communicate with the feed space 11.
- the top plate 3 is still provided in the region of the contact zones 9 with third openings 23 which pass through the top plate 3.
- these third openings 23 equipped with the second opening 13 areas 22 of the lower plate 4 are arranged in the assembled state.
- the second openings 13 are within the third opening 23 and also communicate with the combustion chamber 2.
- the design according to the invention ensures that, on the one hand, the channel system 10 communicates with the combustion chamber 2 through the first openings 12, that is, through the top plate 3, and, secondly, that the supply chamber 11 passes through the second openings 13, that is, within the third openings 23 through the lower plate 4 communicates with the combustion chamber 2.
- the gas-tight separation of the two flow paths to the transition into the combustion chamber 2 is thereby considerably simplified.
- the two feed tubes 7, 8 are each attached to the enclosure 6 and penetrate them.
- the first feed tube 7 communicates with the channel system 10 while the second feed tube 8 communicates with the feed space 11.
- a first gas path is formed, which leads from the first feed tube 7 through the channel system 10 via the first openings 12 into the combustion chamber 2.
- a second gas path which also leads from the second feed tube 8 through the feed space 11 via the second openings 13 into the combustion chamber 2.
- At least one support foot 14 can be arranged in the feed space 11, via which the lower plate 4 is supported on the base plate 5.
- This at least one support leg 14 may preferably be made in one piece with the lower plate 4.
- the respective support leg 14 can be soldered to the bottom plate 5.
- the support foot 14 may be inserted into a (in particular continuous) receiving opening, which is recessed in the bottom plate 5.
- Upper plate 3 and lower plate 4 are fastened to one another in the region of the contact zones 9, for example by means of a first solder connection. Also useful are the feed tubes 7, 8 fixed to the enclosure 6, preferably by means of a solder joint.
- the production of the wall structure 1 is preferably carried out as follows:
- the top plate 3 and the bottom plate 4 are first provided with the first, second and third openings 12, 13, 23, for example by punching, drilling or laser cutting.
- the openings 12, 13, 23 may be included from the beginning.
- the lower plate 4 is designed as a casting, while the upper plate 3 and / or the bottom plate 5 is a sheet metal part.
- the upper plate 3 is firmly connected to the lower plate 4, for example, with the first solder joint.
- the bottom plate 5 is attached, for example with the second solder joint.
- the second solder joint has a lower soldering temperature than the first solder joint.
- the first soldering process is virtually associated with the top plate 3, while the second soldering process is associated with the bottom plate 5.
- the feed tubes 7, 8 can be mounted as part of the first or second soldering operation.
- the channel system 10 is generated by the shape of the top plate 3 and bottom plate 4.
- the lower plate 4 has the lower plate 4, a wavy or rectangular structure, while the top plate 3 has a substantially planar structure.
- the lower plate 4 thus has mountain structures 15 and valley structures 16 for defining the channel system 10. Via the mountain structures 15, the contacting with the upper plate 3 takes place.
- the channel system 10 comprises a plurality of mutually parallel longitudinal channels 17 and at least one, preferably two transverse channels 18, wherein the respective transverse channel 18 extends transversely to the longitudinal channels 17.
- the longitudinal channels 17 communicate with each other.
- two transverse channels 18 are provided, which are arranged at the longitudinal ends of the longitudinal channels 17.
- at least one further transverse channel 18 may be provided, which is arranged between the longitudinal ends of the longitudinal channels 17.
- the one longitudinal channel 17 into which the first feed pipe 7 opens is expediently designed as a pre-distribution space and has a larger volume than the other channels 17, 18.
- flow guidance contours can be incorporated or used in a larger inflow region in order to reduce the gas flow with reduced pressure loss to distribute.
- the regions 22 each extend in a straight line, ie the associated second openings 13 are arranged in the respective region 22 in a straight line one behind the other. Furthermore the regions 22 extend parallel to each other.
- the associated third openings 23 are arranged in the top plate 3 so that in each case between two adjacent third openings 23 a plurality of first openings 12 are arranged. Accordingly, the first openings 12 are arranged in a plurality of mutually parallel straight lines, and the third openings 23 are designed as elongated holes. In the third openings 23, the contact between the top plate 3 and the lower plate 4.
- the lower plate 4 is provided in the embodiment shown here in the contact zones 9 each with a step 25.
- the steps 25 are designed such that they completely surround the respective region 22.
- edge regions 26 come to rest, which enclose the respective third opening 23.
- the contact zones 9 are provided with relatively large areas, which simplifies the production of gas-tight solder joints.
- chamfers 30 may be attached to the steps 25, wherein these chamfers 30 may be formed on the lower plate 4 and / or on the upper plate 3, wherein the a chamfer 30 to the combustion chamber 2 out and the other chamfers 30 may be open to the channel system 10 out.
- the introduction a solder in the contact zones 9 is simplified in the region of the chamfers 30.
- the lower plate 4 has per contact zone 9 exactly on a region 22 which is provided with the second openings 13. Accordingly, the top plate 3 per contact zone 9 also has exactly one third opening 23 for receiving one area 22 each.
- the areas 22 in the assembled state penetrate into the associated third openings 23 toward the combustion space 2.
- the areas 22 are dimensioned such that they each fill an opening cross-section of the associated third openings 23.
- the steps 25 are matched to the thickness of the top plate 3, so that the regions 22 of the bottom plate 4 in the mounted state on a combustion chamber 2 side facing flush and flush with the top plate 3. In this way, the regions 22 provided with the second openings 13 are inserted into the third openings 23 of the top plate 3 in a form-integrated manner.
- the lower plate 4 and the skirt 6 are made in one piece.
- lower plate 4 and skirt 6 form an integral casting.
- lower plate 4 and enclosure 6 may be separately manufactured components, in particular the enclosure 6 is a casting, while the lower plate 4 can basically also be a deep-drawn part.
- the lower plate 4 is attached to the enclosure 6, for example by means of a solder joint.
- the enclosure 6 may be equipped with a middle step, on which the separate lower plate 4 rests and over which the lower plate 4 is soldered to the enclosure 6.
- the lower plate 4 can be assembled from several individual parts.
- the lower plate 4 here comprises a middle part 19, which has the wave-shaped or rectangular structure, and two side parts 20, which are attached to the middle part 19.
- the wave-shaped or rectangular-structured middle part 19 again has the valley structures 16 which are open towards the top plate 3 and the mountain structures 15 which are open toward the feed space 11.
- the middle part 19 is made for example by folding or deep drawing.
- the mountain structures 15 are open due to the production of the central part 19 at their end faces.
- the side parts 20 have a plurality of closures 21, each of which closes a mountain structure 15 laterally.
- the closures 21 are angled away from a channel bottom 31, which is also part of the side part 20. This channel bottom 31 delimits one of the channels of the channel system 10, namely one of the transverse channels 18 to the feed space 11. It is clear that this built sub-plate 4 may have the step 25 at the areas 22.
- the combustion chamber 2 can be enclosed laterally by a combustion chamber wall 27.
- this combustion chamber wall 27 is attached to the wall structure 1.
- this combustion chamber wall 27 is attached to the enclosure 6, for example soldered or welded.
- the combustion chamber wall 27 can be inserted into the enclosure 6.
- the upper step 28 of the enclosure 6 is extended accordingly.
- combustion chamber wall 27 may also be attached to the enclosure 6.
- the combustion chamber wall 27 is e.g. provided with a correspondingly flared collar.
- FIG. 3 shown embodiment of the lower plate 4 can be at least partially with the integral construction of enclosure 6 and lower plate 4 according to Fig. 1 and 2 and with the developments according to the 4 and 5 combine.
- the wall structure 1 according to the side facing away from the combustion chamber 2 Fig. 5 be attached directly to a fuel cell 24, preferably so that an end plate or end plate of the fuel cell 24 forms the bottom plate 5.
- the fuel cell 24 is preferably a high-temperature fuel cell 24.
- Such an end plate 5 typically includes a cathode-side gas outlet of the fuel cell 24, here represented by fourth openings 34 in the end plate 5.
- the cathode-side oxygen product gas mixture the fuel cell 24 pass directly into the feed chamber 11.
- the second feed pipe 8 is then dispensable.
- a cold air tube 35 can be provided in its place, by which cold air can be supplied to the oxygen-containing gas, if necessary, in order to lower the combustion temperature in the combustion chamber 2.
- an anode-side gas outlet of the fuel cell 24 is connected to the duct system 10, for example via the first supply pipe 7 or integrated.
- an ignition device 32 projects into the combustion chamber 2 and is installed, for example, in the combustion chamber wall 27.
- a sensor 33 is shown, for example, is installed in the combustion chamber wall 27 and with a combustion chamber temperature can be monitored.
- the sensor 33 can serve as a flame detector, for example.
- the two feed tubes 7, 8 are connected laterally to the enclosure 6.
- the fuel-containing gas is supplied, while the oxygen-containing gas via the supply chamber 11 is supplied.
- this is particularly useful since the cathode-side oxygen-product gas mixture is present with a larger volume flow, as the anode-side hydrogen-product gas mixture.
- cooling air is used as the cooling gas, which is then admixed with the oxygen-containing gas.
- This can be done, for example, by an additional cold air tube (see position 35 in Fig. 5 ), which is preferably also connected to the feed space 11, z. B. on the enclosure 6 or on the bottom plate. 5
- the fuel-containing gas preferably the fuel-containing gas, as uniformly as possible to the first openings 12, it may be expedient to dimension the individual channels 17, 18 of the channel system 10 differently.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
- Combustion Of Fluid Fuel (AREA)
Description
Die vorliegende Erfindung betrifft eine Wandstruktur zur Begrenzung eines Brennraums eines Brenners, mit den Merkmalen des Oberbegriffs des Anspruchs 1. Die vorliegende Erfindung betrifft außerdem einen mit einer derartigen Wandstruktur ausgestatteten Brenner, sowie ein zugehöriges Betriebsverfahren.The present invention relates to a wall structure for confining a combustion chamber of a burner, having the features of the preamble of
Aus der
Eine weitere Wandstruktur mit einem ähnlichen Aufbau ist aus der
Mit Hilfe eines derartigen Brenners wird in einer im Brennraum ablaufenden Verbrennungsreaktion ein gasförmiger Oxidator mit einem gasförmigen Brennstoff verbrannt. Ein derartiger Brenner kann beispielsweise bei einer Brennstoffzelle dazu dienen, ein anodenseitiges Wasserstoff-Produktgas-Gemisch und ein kathodenseitiges Sauerstoff-Produktgas-Gemisch zu verbrennen, um unerwünschte Wasserstoffemissionen der Brennstoffzelle zu reduzieren. Ein derartiger Brenner ist beispielsweise aus der
Wesentlich für einen derartigen Brenner ist, dass das Oxidatorgas und das Brennstoffgas dem Brennraum separat zugeführt werden, damit die hochreaktiven Gase erst im Brennraum miteinander reagieren. Hierzu besitzt eine Wandstruktur des Brenners, die den Brennraum zumindest an einer Seite begrenzt, erste Öffnungen zur Zuführung des einen Gases und davon getrennte zweite Öffnungen zur Zuführung des zweiten Gases.Essential for such a burner is that the oxidizing gas and the fuel gas are supplied to the combustion chamber separately, so that the highly reactive gases react with each other only in the combustion chamber. For this purpose has a wall structure of the Burner, which limits the combustion chamber, at least on one side, first openings for supplying the gas and a separate second openings for supplying the second gas.
Die vorliegende Erfindung beschäftigt sich mit dem Problem, für eine Wandstruktur bzw. für einen Brenner der eingangs genannten Art eine verbesserte Ausführungsform anzugeben, die sich insbesondere durch eine vereinfachte Herstellbarkeit auszeichnet.The present invention is concerned with the problem of providing an improved embodiment for a wall structure or for a burner of the type mentioned, which is characterized in particular by a simplified manufacturability.
Dieses Problem wird erfindungsgemäß durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.
Die Erfindung beruht auf dem allgemeinen Gedanken, zur Ausbildung der Wandstruktur eine Oberplatte und eine Unterplatte so zu formen und so aneinander anzubringen, dass sich zwischen den Platten ein Kanalsystem ausbildet. Die dem Brennraum zugewandte Oberplatte enthält dann erste Öffnungen, die das Kanalsystem mit dem Brennraum kommunizierend verbinden. Des Weiteren enthält die Unterplatte in Kontaktzonen, in denen die beiden Platten aneinanderliegen, zweite Öffnungen, die einen vom Kanalsystem getrennten Zuführraum durch dritte Öffnungen, die in der Oberplatte in den Kontaktzonen ausgebildet sind, mit dem Brennraum kommunizierend verbinden. Auf diese Weise werden mit einfachen und preiswerten Mitteln in der Wandstruktur zwei getrennte Gaspfade realisiert, die an der Oberplatte durch getrennte Öffnungen in den Brennraum einmünden.The invention is based on the general idea of forming a top plate and a bottom plate so as to form the wall structure and to attach them to one another such that a channel system is formed between the plates. The upper plate facing the combustion chamber then contains first openings which connect the channel system to the combustion chamber in a communicative manner. Furthermore, the sub-plate in contact zones, in which the two plates abut against each other, second openings, which connect a channel separated from the feed system by third openings, which are formed in the top plate in the contact zones, communicating with the combustion chamber. In this way, with simple and inexpensive means in the wall structure, two separate gas paths realized, which open at the top plate through separate openings in the combustion chamber.
Bei einer Weiterbildung kann die Wandstruktur eine seitliche Einfassung aufweisen, die den Zuführraum und das Kanalsystem und insbesondere die Platten seitlich einfasst. Durch diese Einfassung lassen sich Kanalsystem und Zuführraum abdichten und insbesondere eine Brennraumwand anbinden. Mit der Einfassung bildet die Wandstruktur eine komplett vormontierbare Baugruppe, was die Montage eines mit der Wandstruktur ausgestatteten Brenners vereinfacht. Die Einfassung kann mit einem ersten Zuführrohr ausgestattet sein, das mit dem Kanalsystem kommuniziert. Ebenso kann ein zweites Zuführrohr vorgesehen sein, das mit dem Zuführraum kommuniziert.In a further development, the wall structure may have a lateral enclosure which laterally encloses the feed space and the channel system and in particular the plates. Through this enclosure channel system and feed chamber can be sealed and in particular connect a combustion chamber wall. With the enclosure, the wall structure forms a completely pre-assembled assembly, which simplifies the assembly of a torch equipped with the wall structure. The enclosure may be equipped with a first feed tube communicating with the channel system. Likewise, a second feed tube may be provided which communicates with the feed space.
Die Wandstruktur lässt sich besonders günstig herstellen, indem die Oberplatte mit der Unterplatte zur Ausbildung des Kanalsystems verbunden wird. Hierzu eignet sich beispielsweise eine Lötverbindung. Danach können die Zuführrohre an der Einfassung befestigt werden, beispielsweise wieder durch eine Lötverbindung. Vorzugsweise wird dabei eine Lötverbindung mit reduzierter Löttemperatur verwendet, um beim Löten der Rohre die Lötverbindung zwischen Ober- und Unterplatte nicht zu gefährden. Die diversen Öffnungen können vorab separat in die Platten eingebracht werden.The wall structure can be produced particularly favorably by connecting the top plate to the bottom plate to form the channel system. For this purpose, for example, a solder joint is suitable. Thereafter, the feed tubes can be attached to the enclosure, for example, again by a solder joint. Preferably, a solder joint with a reduced soldering temperature is used in order not to endanger the solder joint between the upper and lower plate during soldering of the pipes. The various openings can be introduced separately in advance in the plates.
Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.
Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile beziehen.Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.
Es zeigen, jeweils schematisch,
- Fig. 1
- teilweise geschnittene, perspektivische Ansicht auf eine Wandstruktur,
- Fig. 2
- eine teilweise geschnittene Seitenansicht der Wandstruktur gemäß
Fig. 1 , - Fig. 3
- eine perspektivische Ansicht auf eine Unterplatte der Wandstruktur bei einer speziellen Ausführungsform,
- Fig. 4
- eine teilweise geschnittene perspektivische Ansicht auf die Wandstruktur bei einer Weiterbildung,
- Fig. 5
- eine teilweise geschnittene Seitenansicht der Wandstruktur gemäß
Fig. 4 bei einer speziellen Anwendung.
- Fig. 1
- partially cut, perspective view of a wall structure,
- Fig. 2
- a partially sectioned side view of the wall structure according to
Fig. 1 . - Fig. 3
- a perspective view of a lower plate of the wall structure in a specific embodiment,
- Fig. 4
- a partially cutaway perspective view of the wall structure in a development,
- Fig. 5
- a partially sectioned side view of the wall structure according to
Fig. 4 in a special application.
Die Oberplatte 3 ist dem Brennraum 2 ausgesetzt. Die Unterplatte 4 ist weitgehend an einer vom Brennraum 2 abgewandten Seite der Oberplatte 3 innerhalb der Wandstruktur 1 angeordnet, und zwar so, dass die Unterplatte 4 in Kontaktzonen 9 an der Oberplatte 3 anliegt. Die Formgebung von Oberplatte 3 und Unterplatte 4 ist gezielt so gewählt, dass zwischen Oberplatte 3 und Unterplatte 4 ein Kanalsystem 10 ausgebildet ist. Des Weiteren trennt die Unterplatte 4 das Kanalsystem 10 von einem Zuführraum 11, der an einer vom Brennraum 2 abgewandten Seite der Unterplatte 4 in der Wandstruktur 1 ausgebildet ist. Gegenüber der Unterplatte 4 ist besagter Zuführraum 11 durch die Bodenplatte 5 begrenzt. Die Einfassung 6 umschließt umfangsmäßig geschlossen die Oberplatte 3, das Kanalsystem 10, die Unterplatte 4, den Zuführraum 11 und die Bodenplatte 5.The
Zum vereinfachten gasdichten Einbau der Oberplatte 3 in die Einfassung 6 ist die Einfassung 6 mit einer oberen Stufe 28 versehen, in welche die Oberplatte 3 einsetzbar ist. In entsprechender Weise besitzt die Einfassung 6 zweckmäßig auch eine untere Stufe 29, in welche die Bodenplatte 5 einsetzbar ist.For simplified gas-tight installation of the
Die Oberplatte 3 enthält erste Öffnungen 12, welche die Oberplatte 3 durchdringen und welche den Brennraum 2 direkt mit dem Kanalsystem 10 kommunizierend verbinden. Im Bereich der Kontaktzonen 9 weist die Unterplatte 4 Bereiche 22 mit zweiten Öffnungen 13 auf, welche die Unterplatte 4 durchdringen und mit dem Zuführraum 11 kommunizieren. Außerdem ist die Oberplatte 3 im Bereich der Kontaktzonen 9 noch mit dritten Öffnungen 23 versehen, welche die Oberplatte 3 durchsetzen. In diesen dritten Öffnungen 23 sind im montierten Zustand die mit den zweiten Öffnung 13 ausgestatteten Bereiche 22 der Unterplatte 4 angeordnet. In der Folge befinden sich die zweiten Öffnungen 13 innerhalb der dritten Öffnung 23 und kommunizieren außerdem mit dem Brennraum 2.The
Durch die erfindungsgemäße Bauweise wird erreicht, dass zum einen das Kanalsystem 10 durch die ersten Öffnungen 12, also durch die Oberplatte 3 mit dem Brennraum 2 kommuniziert und dass zum anderen der Zuführraum 11 durch die zweiten Öffnungen 13, also innerhalb der dritten Öffnungen 23 durch die Unterplatte 4 mit dem Brennraum 2 kommuniziert. Die gasdichte Trennung der beiden Strömungspfade bis zum Übergang in den Brennraum 2 wird dadurch erheblich vereinfacht.The design according to the invention ensures that, on the one hand, the
Die beiden Zuführrohre 7, 8 sind jeweils an der Einfassung 6 befestigt und durchdringen diese. Das erste Zuführrohr 7 kommuniziert mit dem Kanalsystem 10, während das zweite Zuführrohr 8 mit dem Zuführraum 11 kommuniziert. Auf diese Weise ist in der Wandstruktur 1 ein erster Gaspfad ausgebildet, der vom ersten Zuführrohr 7 durch das Kanalsystem 10 über die ersten Öffnungen 12 in den Brennraum 2 führt. Davon getrennt ist ein zweiter Gaspfad, der vom zweiten Zuführrohr 8 durch den Zuführraum 11 über die zweiten Öffnungen 13 ebenfalls in den Brennraum 2 führt.The two
Zur Aussteifung der Wandstruktur 1 kann im Zuführraum 11 wenigstens ein Stützfuß 14 angeordnet sein, über den die Unterplatte 4 an der Bodenplatte 5 abgestützt ist. Dieser wenigstens eine Stützfuß 14 kann vorzugsweise mit der Unterplatte 4 einstückig hergestellt sein. Zusätzlich kann der jeweilige Stützfuß 14 mit der Bodenplatte 5 verlötet sein. Hierzu kann der Stützfuß 14 in eine (insbesondere durchgehende) Aufnahmeöffnung eingesetzt sein, die in der Bodenplatte 5 ausgespart ist.For stiffening the
Oberplatte 3 und Unterplatte 4 sind im Bereich der Kontaktzonen 9 aneinander befestigt, beispielsweise mittels einer ersten Lötverbindung. Zweckmäßig sind auch die Zuführrohre 7, 8 an der Einfassung 6 befestigt, und zwar vorzugsweise mittels einer Lötverbindung.
Die Herstellung der Wandstruktur 1 erfolgt vorzugsweise wie folgt:The production of the
Die Oberplatte 3 und die Unterplatte 4 werden zunächst mit den ersten, zweiten und dritten Öffnungen 12, 13, 23 versehen, beispielsweise durch Ausstanzen, Bohren oder Laserschneiden. Bei einer als Gussteil ausgestalteten Platte 3, 4 können die Öffnungen 12, 13, 23 von Anfang an enthalten sein. Vorzugsweise ist die Unterplatte 4 als Gussteil gestaltet, während die Oberplatte 3 und/oder die Bodenplatte 5 ein Blechteil ist. Anschließend wird die Oberplatte 3 mit der Unterplatte 4 fest verbunden, beispielsweise mit der ersten Lötverbindung. Erst danach wird die Bodenplatte 5 angebracht, beispielsweise mit der zweiten Lötverbindung. Die zweite Lötverbindung besitzt dabei eine niedrigere Löttemperatur als die erste Lötverbindung. Auf diese Weise ist sichergestellt, dass die zuvor hergestellte erste Lötverbindung, insbesondere zwischen Oberplatte 3 und Unterplatte 4 beim Herstellen der zweiten Lötverbindung nicht beeinträchtigt wird. Der erste Lötvorgang ist quasi der Oberplatte 3 zugeordnet, während der zweite Lötvorgang der Bodenplatte 5 zugeordnet ist. Die Zuführrohre 7, 8 können im Rahmen des ersten oder zweite Lötvorgangs angebracht werden.The
Das Kanalsystem 10 wird durch die Formgebung von Oberplatte 3 und Unterplatte 4 erzeugt. Hierzu besitzt die Unterplatte 4 eine wellenförmige oder rechteckförmige Struktur, während die Oberplatte 3 im wesentlichen eine ebene Struktur aufweist. Die Unterplatte 4 besitzt somit Bergstrukturen 15 und Talstrukturen 16 zur Definition des Kanalsystems 10. Über die Bergstrukturen 15 erfolgt die Kontaktierung mit der Oberplatte 3.The
Das Kanalsystem 10 umfasst mehrere zueinander parallele Längskanäle 17 sowie wenigstens einen, vorzugsweise zwei Querkanäle 18, wobei der jeweilige Querkanal 18 quer zu den Längskanälen 17 verläuft. Über den jeweiligen Querkanal 18 kommunizieren die Längskanäle 17 miteinander. Vorzugsweise sind zwei Querkanäle 18 vorgesehen, die an den Längsenden der Längskanäle 17 angeordnet sind. Zusätzlich kann zumindest ein weiterer Querkanal 18 vorgesehen sein, der zwischen den Längsenden der Längskanäle 17 angeordnet ist.The
Derjenige Längskanal 17, in den das erste Zuführrohr 7 einmündet, ist zweckmäßig als Vorverteilungsraum ausgestaltet und weist ein größeres Volumen auf als die anderen Kanäle 17, 18. Zusätzlich können in einem größeren Einströmbereich Strömungsleitkonturen eingearbeitet bzw. eingesetzt sein, um die Gasströmung mit reduziertem Druckverlust zu verteilen.The one
Mit Bezug auf
Um das Verlöten der Platten 3, 4 im Bereich der Kontaktzonen 9 zu vereinfachen, kann es zweckmäßig sein, an den Stufen 25 Fasen 30 anzubringen, wobei diese Fasen 30 an der Unterplatte 4 und/oder an der Oberplatte 3 ausgebildet sein können, wobei die einen Fasen 30 zum Brennraum 2 hin und die anderen Fasen 30 zum Kanalsystem 10 hin offen sein können. Das Einbringen eines Lötmittels in die Kontaktzonen 9 wird im Bereich der Fasen 30 vereinfacht.In order to simplify the soldering of the
Die Unterplatte 4 weist je Kontaktzone 9 genau einen Bereich 22 auf, der mit den zweiten Öffnungen 13 versehen ist. Dementsprechend besitzt die Oberplatte 3 je Kontaktzone 9 ebenfalls genau eine dritte Öffnung 23 zur Aufnahme je eines Bereichs 22. Die Bereiche 22 dringen im montierten Zustand zum Brennraum 2 hin in die zugehörigen dritten Öffnungen 23 ein. Zur Erzielung einer einfachen Abdichtung sind die Bereiche 22 so dimensioniert, dass sie jeweils einen Öffnungsquerschnitt der zugehörigen dritten Öffnungen 23 ausfüllen. Besonders vorteilhaft sind die Stufen 25 auf die Dicke der Oberplatte 3 abgestimmt, so dass die Bereiche 22 der Unterplatte 4 im montierten Zustand an einer dem Brennraum 2 zugewandten Seite eben und bündig mit der Oberplatte 3 abschließen. Auf diese Weise sind die mit den zweiten Öffnungen 13 versehenen Bereiche 22 in die dritten Öffnungen 23 der Oberplatte 3 formintegriert eingesetzt.The
Bei der in
Bei einer anderen Ausführungsform können Unterplatte 4 und Einfassung 6 separat hergestellte Bauteile sein, wobei insbesondere die Einfassung 6 ein Gussteil ist, während die Unterplatte 4 grundsätzlich auch ein Tiefziehteil sein kann. Zweckmäßig ist die Unterplatte 4 an der Einfassung 6 befestigt, beispielsweise mittels einer Lötverbindung. Hierzu kann die Einfassung 6 mit einer mittleren Stufe ausgestattet sein, auf der die separate Unterplatte 4 aufliegt und über die die Unterplatte 4 mit der Einfassung 6 verlötet ist.In another embodiment,
Gemäß
Entsprechend den
Alternativ kann die Brennraumwand 27 auch auf die Einfassung 6 aufgesteckt sein. Hierzu ist die Brennraumwand 27 z.B. mit einem entsprechend aufgeweiteten Kragen versehen.Alternatively, the
Die in
Bei einer besonderen Ausführungsform kann die Wandstruktur 1 an der vom Brennraum 2 abgewandten Seite gemäß
Desweiteren ist in den
Bei den in den
Vorzugsweise wird im Betrieb des mit der Wandstruktur 1 ausgestatteten Brenners über das Kanalsystem 10 das brennstoffhaltige Gas zugeführt, während das sauerstoffhaltige Gas über den Zuführraum 11 zugeführt wird. Bei der bevorzugten Anwendung des Brenners zum Verbrennen der Abgase einer Brennstoffzelle 24 ist dies besonders zweckmäßig, da das kathodenseitige Sauerstoff-Produktgas-Gemisch mit einem größeren Volumenstrom vorliegt, als das anodenseitige Wasserstoff-Produktgas-Gemisch.Preferably, during operation of the burner provided with the
Um die Temperatur im Brennraum 2 zu reduzieren, ist es grundsätzlich möglich, ein entsprechendes Kühlgas der einen oder der anderen Gasströmung beizumischen. Vorzugsweise wird als Kühlgas Kühlluft verwendet, die dann dem sauerstoffhaltigen Gas beigemischt wird. Dies kann beispielsweise durch ein zusätzliches Kaltluftrohr (vergleiche Position 35 in
Um das dem Kanalsystem 10 zugeführte Gas, vorzugsweise das brennstoffhaltige Gas, möglichst gleichmäßig auf die ersten Öffnungen 12 zu verteilen, kann es zweckmäßig sein, die einzelnen Kanäle 17, 18 des Kanalsystems 10 unterschiedlich zu dimensionieren.In order to distribute the gas supplied to the
Claims (19)
- A wall structure for delimiting a combustion chamber (2) of a burner,- with an upper plate (3) exposed to the combustion chamber (2),- with a lower plate (4), which bears against the upper plate (3) on a side facing away from the combustion chamber (2),- wherein upper plate (3) and/or lower plate (4) are formed so that between upper plate (3) and lower plate (4) a channel system (10) is formed,- wherein the upper plate (3) contains first openings (12) which communicate with the channel system (10),- wherein the lower plate (4) has a plurality of regions (22) each with a plurality of second openings (13), which communicate with a feeding chamber (11), which is arranged on a side of the lower plate (4) facing away from the combustion chamber (2),characterized- in that the upper plate (3) has third openings (23), in each of which one of the regions (22) provided with the second openings (13) is arranged.
- The wall structure according to Claim 1, characterized- in that the regions (22) in each case extend in a straight line and parallel to one another,- in that the second openings (13) are arranged in the respective region (22) in a straight line one after the other,- in that the third openings (23) are each arranged between adjacent first openings (12),- in that the first openings (12) are arranged in a plurality of straight lines running parallel to one another,- in that the third openings (23) are configured as elongated holes.
- The wall structure according to Claim 1 or 2,
characterized by at least one of the following features:- the respective region (22) enters the respective third opening (23) towards the combustion chamber (2);- the respective region (22) fills out an opening cross section of the associated third opening (23);- the respective region (22) terminates flat and flush with the upper plate (3) on a side facing the combustion chamber (2). - The wall structure according to any one of the Claims 1 to 3,
characterized
in that the lower plate (4) bears against the upper plate (3) in contact zones (9). - The wall structure according to Claim 4,
characterized by at least one of the following features:- the regions (22) provided with the second openings (13) are enclosed by the contact zones (9) and/or arranged within the contact zones (9);- the third openings (23) are enclosed by the contact zones (9) and/or arranged within the contact zones (9);- the lower plate (4) has exactly one region (22) provided with the second openings (13) for each contact zone (9);- the upper plate (3) has exactly one third opening (23) for each contact zone (9);- the lower plate (4) is fastened to the upper plate (3) in the contact zone (9). - The wall structure according to any one of the Claims 1 to 5,
characterized
in that the lower plate (4) comprises steps (25) enclosing the regions (22) provided with the second openings (13), on which the marginal regions (26) of the upper plate (3) enclosing the third openings (23) are supported. - The wall structure according to Claim 6, characterized- in that on the respective step (25) towards the channel system (10) a chamfer (30) is formed on the lower plate (4) and/or on the upper plate (3), and/or- in that on the respective step (25) towards the combustion chamber (2) a chamfer (30) is formed on the lower plate (4) and/or on the upper plate (3).
- The wall structure according to any one of the Claims 1 to 7,
characterized by at least one of the following features:- the channel system (10) is separated from the feeding chamber (11) by the lower plate (4);- a floor plate (5) delimits the feeding chamber (11) on a side that is distant from the combustion chamber (2);- the lower plate (4) is supported on and/or fastened to a floor plate (5) via at least one support foot (14), wherein the at least one support foot (14) can be unitarily formed on the lower plate (4). - The wall structure according to any one of the Claims 1 to 8,
characterized
in that the wall structure (1) has a lateral enclosure (6), which laterally encloses the feeding chamber (11) and the channel system (10). - The wall structure according to Claim 9,
characterized by at least one of the following features:- the upper plate (3) is laterally enclosed by the enclosure (6);- the floor plate (5) is laterally enclosed by the enclosure (6);- the upper plate (4) is laterally enclosed by the enclosure (6);- on the enclosure (6) a first feeding pipe (7) is fastened, which communicates with the channel system (10);- on the enclosure (6), a second feeding pipe (8) is fastened, which communicates with the feeding chamber (11). - The wall structure according to any one of the Claims 1 to 9,
characterized by at least one of the following features:- with a first soldered connection, the upper plate (3) is fastened to the lower plate (4) and/or the upper plate (3) is fastened to an enclosure (6) laterally enclosing the feeding chamber (11) and the channel system (10);- with a second soldered connection, the feeding pipe or pipes (7, 8) are fastened to an enclosure (6) laterally enclosing the feeding chamber (11) and the channel system (10) and/or the floor plate (5) is fastened to the enclosure (6);- the second soldered connection has a lower soldering temperature than the first soldered connection. - The wall structure according to any one of the Claims 1 to 11,
characterized by at least one of the following features:- the channel system (10) is formed by a wavy or rectangular structure of the lower plate (4);- the channel system (10) comprises a plurality of longitudinal channels (17) which run parallel to one another, and at least one transverse channel (18), which runs transversely to the longitudinal channels (17) and via which the longitudinal channels (17) communicate with one another. - The wall structure according to any one of the Claims 1 to 12,
characterized by at least one of the following features:- the upper plate (3) has a flat structure;- the lower plate (4) is embodied as casting. - The wall structure according to any one of the Claims 9 to 11,
characterized by at least one of the following features:- the enclosure (6) is embodied as casting;- the lower plate (4) and the enclosure (6) are embodied as unitary casting. - The wall structure according to any one of the Claims 1 to 14,
characterized by at least one of the following features:- the lower plate (4) is embodied as deep-drawn part or as folded part;- the lower plate (4) is assembled from a plurality of individual parts (19, 20);- the lower plate (4) has a wavy or rectangular structure and comprises valley structures (16) that are open towards the upper plate (3), which form channels (17) of the channel system (10), and comprise peak structures (15) that are open towards the feeding chamber (11), which comprise contact zones (9);- peak structures (15) of the lower plate (4) are closed off by closures (21) on at least one face end, which are angled off a lateral part (20);- a lateral part (20) delimits a channel (18) of the channel system (10) towards the feeding chamber (11). - The wall structure according to any one of the Claims 1 to 15,
characterized by at least one of the following features:- the combustion chamber (2) is laterally enclosed by a combustion chamber wall (27), which is fastened to the wall structure (1);- a combustion chamber wall (27) fastened to the wall structure (1) and laterally enclosing the combustion chamber (2) is fastened to an enclosure (6) laterally enclosing the feeding chamber (11) and the channel system (10);- a combustion chamber wall (27) laterally enclosing the combustion chamber (2) and fastened to the wall structure (1) is inserted in an enclosure (6) laterally enclosing the feeding chamber (11) and the channel system (10) ;- a combustion chamber wall (27) fastened to the wall structure (1) and laterally enclosing the combustion chamber (2) is fitted onto an enclosure (6) laterally enclosing the feeding chamber (11) and the channel system (10);- an ignition device (32) and/or a sensor (33) project into the combustion chamber (2). - The wall structure according to any one of the Claims 1 to 16,
characterized- in that a floor plate (5) delimiting the feeding chamber (11) on a side that is distant from the combustion chamber (2) is formed by an end plate of a fuel cell (24), and- in that through the end plate formed as gas distributor of the fuel cell (24) a gas (anode waste gas or cathode waste gas) directly enters the feeding chamber (11). - A burner for combusting a gaseous hydrogen-containing fuel with a gaseous oxygen-containing oxidant, with a combustion chamber (2) in which the combustion reaction during the operation of the burner takes place, and with a wall structure (1) according to any one of the Claims 1 to 17, delimiting the combustion chamber (2) on one side.
- A method for operating a burner according to Claim 18 for combusting a gaseous hydrogen-containing fuel with a gaseous oxygen-containing oxidant, wherein the one gas is fed to the channel system (10) and the other gas is fed to the feeding chamber (11).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07102766T PL1830128T3 (en) | 2006-03-03 | 2007-02-21 | Burner wall structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006010375A DE102006010375B4 (en) | 2006-03-03 | 2006-03-03 | Wall structure for a burner |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1830128A2 EP1830128A2 (en) | 2007-09-05 |
EP1830128A3 EP1830128A3 (en) | 2008-09-10 |
EP1830128B1 true EP1830128B1 (en) | 2012-08-01 |
Family
ID=38016929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07102766A Active EP1830128B1 (en) | 2006-03-03 | 2007-02-21 | Burner wall structure |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1830128B1 (en) |
DE (1) | DE102006010375B4 (en) |
PL (1) | PL1830128T3 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008019854A1 (en) | 2008-04-23 | 2009-10-29 | J. Eberspächer GmbH & Co. KG | Wall structure and burner as well as system |
DE102010039022B4 (en) | 2010-08-06 | 2022-08-11 | Eberspächer Climate Control Systems GmbH & Co. KG | burner and fuel cell system |
DE102016206247A1 (en) * | 2016-04-14 | 2017-11-02 | Gvp Gesellschaft Zur Vermarktung Der Porenbrennertechnik Mbh | surface burner |
US11160417B2 (en) | 2016-11-25 | 2021-11-02 | Rational International Ag | Burner system for a cooking appliance, and method for operating a burner system for a cooking appliance |
DE102016122778A1 (en) * | 2016-11-25 | 2018-05-30 | Frima International Ag | Burner system for a cooking appliance |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2034352C2 (en) | 1970-07-10 | 1984-02-23 | Lanemark Ltd., Coventry | Gas burner of metal plate components - has tubular protrusions fitting together formed round plates apertures |
GB9013368D0 (en) * | 1990-06-15 | 1990-08-08 | Lanemark Ltd | Improvements in or relating to burners |
CA2352482A1 (en) * | 2001-07-05 | 2003-01-05 | Nicholas Andrew. Barber | Ceramic gas fired hearth burner |
DE102004033545B4 (en) * | 2004-07-09 | 2006-06-14 | J. Eberspächer GmbH & Co. KG | burner |
DE102004037689A1 (en) * | 2004-08-02 | 2006-03-16 | Behr Gmbh & Co. Kg | Surface burner, in particular for a fuel cell system |
DE102005031231B3 (en) | 2005-07-01 | 2007-01-11 | J. Eberspächer GmbH & Co. KG | Wall structure for a burner |
-
2006
- 2006-03-03 DE DE102006010375A patent/DE102006010375B4/en not_active Expired - Fee Related
-
2007
- 2007-02-21 EP EP07102766A patent/EP1830128B1/en active Active
- 2007-02-21 PL PL07102766T patent/PL1830128T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
PL1830128T3 (en) | 2013-04-30 |
EP1830128A2 (en) | 2007-09-05 |
DE102006010375A1 (en) | 2007-09-06 |
EP1830128A3 (en) | 2008-09-10 |
DE102006010375B4 (en) | 2008-01-17 |
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