EP2177830A1 - Gas burner for a combined gas-air control system - Google Patents
Gas burner for a combined gas-air control system Download PDFInfo
- Publication number
- EP2177830A1 EP2177830A1 EP08166811A EP08166811A EP2177830A1 EP 2177830 A1 EP2177830 A1 EP 2177830A1 EP 08166811 A EP08166811 A EP 08166811A EP 08166811 A EP08166811 A EP 08166811A EP 2177830 A1 EP2177830 A1 EP 2177830A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- mixture
- burner
- region
- air
- 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.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
- F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
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- 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/70—Baffles or like flow-disturbing devices
-
- 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
Definitions
- the present invention relates to a gas burner with a mixture distributor, a arranged in the flame region of a burner surface ionization, which detects a dependent of the combustion of a gas-air mixture ionization current, a signal processing device which provides a function of an ionization current signal a controlled variable for a control device, the sets the gas-air ratio for combustion to a setpoint.
- a gas burner of the type mentioned is for example from the EP 1 036 984 B1 known.
- the known premix burner has a mixture distributor in the form of a burner plate, which is provided with a plurality of mixture through-openings.
- An ionization electrode is disposed on the left edge of the burner plate and extends into the region of the burner plate.
- the mixture passage area of the mixture distributor is increased, as a result of which the surface load of the burner in the region of the ionization electrode is increased.
- the ionization signal can be processed by an additional electronics such that it represents the air ratio of the premix burner.
- the ionization signal is determined by the flow resistance of the burner surface in the region of the ionization electrode. For a given burner power, the ionization signal can not be increased further with the measure known from the prior art.
- the invention has for its object to improve a gas burner in such a way that it provides an ionization current signal for a gas-air composite control, the signal swing is improved over the entire power range of the burner.
- the gas burner has a mixture supply space comprising an ionization electrode associated region which is separated by a separation from the remaining region of the mixture supply space, wherein the mixture supply space is constructed so that the gas-air Mixture in which the ionization electrode associated region has a higher pressure than in the remaining region of the mixture supply space.
- the invention has the advantage that, because of the higher pressure prevailing in the region of the ionization electrode in the mixture supply space, the flow rate of the gas-air mixture per unit area of the burner surface in the region of the ionization electrode is increased, whereby the ionization current detected by the ionization electrode over the entire power range of the Brenners is increased.
- openings (29) can be changed by means of an exchangeable insert, whereby the pressure drop caused by the openings (29) can be adapted to the burner output or to the burner type.
- the mixture supply space 26, 27 is closed by a mixture distributor 24 and a burner end 30.
- the mixture distributor has a homogeneous mixture passage area on, through which the gas-air mixture 12 flows through a homogeneous burner surface 23 into a combustion chamber 28 in which the gas-air mixture is ignited and burned.
- the ionization electrode 2 detects a dependent of the combustion of the gas-air mixture ionization.
- FIGS. 2A and 2B show in a side and a profile view another embodiment of a cylinder burner. This differs from that in the Figures 1A and 1B shown gas burner characterized in that the separation 25 does not form a closed surface, but a homogeneous mixture passage area for the gas-air mixture.
- the region 26 supplied gas-air mixture 12 flows through the partition 25 in the remaining region 27 of the mixture supply space.
- the separation 25 causes a pressure drop, which is dependent on the mixture passage area. In the region 27 there is a pressure which is lower than the pressure in the region 26.
- the mixture passage area of the separation can be changed by means of an exchangeable insert.
- the pressure drop caused by the separation can be adapted to the burner output or to the burner type.
- FIGS. 3A and 3B show in a side and profile view a flat burner. This one has the same as the one in the FIGS. 2A and 2B Cylinder burner shown a partition 25 with a homogeneous mixture passage area. On the mixture supply side, the region 26, the gas-air mixture 12 is supplied, which flows through the partition 25 in the remaining region 27 of the mixture supply space. The separation 25 causes a pressure drop, so that the pressure in the remaining area 27 is lower is the pressure in the region 26 associated with the ionization electrode.
- the mixture supply space 26, 27 is closed by a mixture distributor 24, which has a homogeneous mixture passage area.
- the mixture distributor 24 distributes the gas-air mixture 12 to a homogeneous burner surface 23, through which the gas-air mixture 12 flows into a combustion chamber 28, in which the gas-air mixture is ignited and burned.
- the arranged in the flame region of the burner surface 23 ionization electrode 2 detects a dependent of the combustion of the gas-air mixture 12 ionization.
- FIG. 4 shows in a diagram a waveform of the ionization current I as a function of the burner power P.
- the Ionisationsstromsignal 21 obtained by the invention has over the strichlin convinced ionization signal 20 of the prior art increased over the entire power range of the burner 22 Signalhub, whereby the quality of the gas Air-composite control is improved.
- FIG. 5 shows in a functional block diagram a gas-air composite control with a gas burner 1 according to the invention, an ionization electrode 2, which detects a combustion dependent ionization current, a signal processing circuit 3 which provides a controlled variable 14 for a control unit 4 in dependence on the ionization current signal 13.
- a fan 6 is ambient air 8 and a gas valve 5, for example, a fuel gas 9 is supplied.
- a mixer 7 mixes the air quantity 10 set by the blower 6 with the fuel gas amount 11 set by the gas valve 5 to form a gas-air mixture 12 which is supplied to the gas burner 1.
- control unit 4 In a heat or power demand 15, 16, the control unit 4 generates the control signals 17, 18, whereby the amount of air or gas 10, 11 is set.
- the control signal 17 controls e.g. the gas valve 5 and the control signal 18 controls the blower 6.
- the signal 19 is optional and denotes a feedback of the amount of blower 10th
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft einen Gasbrenner mit einem Gemischverteiler, einer im Flammenbereich einer Brenneroberfläche angeordneten Ionisationselektrode, die einen von der Verbrennung eines Gas-Luft-Gemisches abhängigen Ionisationsstrom erfasst, einer Signalverarbeitungseinrichtung, die in Abhängigkeit von einem Ionisationsstromsignal eine Regelgrösse für eine Regeleinrichtung bereitstellt, die das Gas-Luft-Verhältnis für die Verbrennung nach einem Sollwert einstellt.The present invention relates to a gas burner with a mixture distributor, a arranged in the flame region of a burner surface ionization, which detects a dependent of the combustion of a gas-air mixture ionization current, a signal processing device which provides a function of an ionization current signal a controlled variable for a control device, the sets the gas-air ratio for combustion to a setpoint.
Ein Gasbrenner der eingangs genannten Art ist beispielsweise aus der
Bei Gasbrennern, denen das Gas-Luft-Gemisch mittels eines Gebläses zugeführt wird, tritt insbesondere im unteren, häufig aber auch im oberen Leistungsbereich des Brenners eine starke Verminderung des Ionisationssignals auf. Das Ionisationssignal wird dabei durch den Strömungswiderstand der Brenneroberfläche im Bereich der Ionisationselektrode bestimmt. Bei vorgegebener Brennerleistung kann mit der aus dem Stand der Technik bekannten Massnahme das Ionisationssignal nicht weiter erhöht werden.
Der Erfindung liegt die Aufgabe zugrunde, einen Gasbrenner dahingehend zu verbessern, dass dieser ein Ionisationsstromsignal für eine Gas-Luft-Verbundregelung bereitstellt, dessen Signalhub über den gesamten Leistungsbereich des Brenners verbessert ist.In gas burners, to which the gas-air mixture is supplied by means of a blower, occurs especially in the lower, but often in the upper power range of the burner to a strong reduction of the ionization signal. The ionization signal is determined by the flow resistance of the burner surface in the region of the ionization electrode. For a given burner power, the ionization signal can not be increased further with the measure known from the prior art.
The invention has for its object to improve a gas burner in such a way that it provides an ionization current signal for a gas-air composite control, the signal swing is improved over the entire power range of the burner.
Die Aufgabe wird gemäss der Erfindung dadurch gelöst, dass der Gasbrenner einen Gemischzufuhrraum aufweist, der einen der Ionisationselektrode zugeordneten Bereich umfasst, der durch eine Abtrennung von dem übrigen Bereich des Gemischzufuhrraumes getrennt ist, wobei der Gemischzufuhrraum so aufgebaut ist, dass das Gas-Luft-Gemisch in dem der Ionisationselektrode zugeordneten Bereich einen höheren Druck aufweist als in dem übrigen Bereich des Gemischzufuhrraumes.The object is achieved according to the invention in that the gas burner has a mixture supply space comprising an ionization electrode associated region which is separated by a separation from the remaining region of the mixture supply space, wherein the mixture supply space is constructed so that the gas-air Mixture in which the ionization electrode associated region has a higher pressure than in the remaining region of the mixture supply space.
Die Erfindung hat den Vorteil, dass aufgrund des im Bereich der Ionisationselektrode im Gemischzufuhrraum herrschenden höheren Drucks, die Strömungsmenge des Gas-Luft-Gemisches pro Flächeneinheit der Brenneroberfläche im Bereich der Ionisationselektrode erhöht wird, wodurch der von der Ionisationselektrode erfasste Ionisationsstrom über den gesamten Leistungsbereich des Brenners erhöht wird.The invention has the advantage that, because of the higher pressure prevailing in the region of the ionization electrode in the mixture supply space, the flow rate of the gas-air mixture per unit area of the burner surface in the region of the ionization electrode is increased, whereby the ionization current detected by the ionization electrode over the entire power range of the Brenners is increased.
Weitere Vorteile der Erfindung ergeben sich aus der Beschreibung und sind Gegenstand der abhängigen Ansprüche.Further advantages of the invention will become apparent from the description and subject of the dependent claims.
Nachfolgend werden verschiedene Ausführungsbeispiele der Erfindung anhand der Figuren beschrieben. Es zeigen:
-
Figuren 1A und 1B ein erstes Ausführungsbeispiel, -
Figuren 2A und 2B ein zweites Ausführungsbeispiel, -
Figuren 3A und 3B ein drittes Ausführungsbeispiel, -
Figur 4 einen Signalverlauf des Ionisationsstromes und -
Figur 5 eine Gas-Luft-Verbundregelung.
-
Figures 1A and 1B a first embodiment, -
FIGS. 2A and 2B a second embodiment, -
FIGS. 3A and 3B a third embodiment, -
FIG. 4 a waveform of the ionization and -
FIG. 5 a gas-air composite system.
Anstelle mehrerer Öffnungen 29 kann auch nur eine Öffnung vorhanden sein. Auch können die Abmessungen der Öffnungen (29) mittels eines austauschbaren Einsatzes verändert werden, wodurch der durch die Öffnungen (29) bewirkte Druckabfall an die Brennerleistung bzw. an den Brennertyp anpassbar ist.Instead of a plurality of
Der Gemischzufuhrraum 26, 27 ist durch einen Gemischverteiler 24 und einen Brennerabschluss 30 abgeschlossen. Der Gemischverteiler weist eine homogene Gemischdurchtrittsfläche auf, durch die das Gas-Luft-Gemisch 12 über eine homogene Brenneroberfläche 23 in einen Feuerraum 28 strömt, in dem das Gas-Luft-Gemisch gezündet und verbrannt wird. Die Ionisationselektrode 2 erfasst dabei einen von der Verbrennung des Gas-Luft-Gemisches abhängigen Ionisationsstrom.The
Das dem Bereich 26 zugeführte Gas-Luft-Gemisch 12 strömt durch die Abtrennung 25 in den übrigen Bereich 27 des Gemischzufuhrraumes. Dabei bewirkt die Abtrennung 25 einen Druckabfall, der abhängig von der Gemischdurchtrittsfläche ist. In dem Bereich 27 herrscht ein Druck, der geringer ist als der Druck in dem Bereich 26.
The
Gemäss einer Weiterbildung kann die Gemischdurchtrittsfläche der Abtrennung mittels eines austauschbaren Einsatzes verändert werden. Dadurch kann der durch die Abtrennung bewirkte Druckabfall an die Brennerleistung bzw. an den Brennertyp angepasst werden.According to a development, the mixture passage area of the separation can be changed by means of an exchangeable insert. As a result, the pressure drop caused by the separation can be adapted to the burner output or to the burner type.
Der Gemischzufuhrraum 26, 27 ist durch einen Gemischverteiler 24 abgeschlossen, der eine homogene Gemischdurchtrittsfläche aufweist. Der Gemischverteiler 24 verteilt das Gas-Luft-Gemisch 12 an eine homogene Brenneroberfläche 23, durch die das Gas-Luft-Gemisch 12 in einen Feuerraum 28 strömt, in dem das Gas-Luft-Gemisch gezündet und verbrannt wird. Die im Flammenbereich der Brenneroberfläche 23 angeordnete Ionisationselektrode 2 erfasst dabei einen von der Verbrennung des Gas-Luft-Gemisches 12 abhängigen Ionisationsstrom.The
Einem Gebläse 6 wird z.B. Umgebungsluft 8 und einem Gasventil 5 wird z.B. ein Brennstoffgas 9 zugeführt. Ein Mischer 7 mischt die durch das Gebläse 6 eingestellte Luftmenge 10 mit der durch das Gasventil 5 eingestellten Brennstoffgasmenge 11 zu einem Gas-Luft-Gemisch 12, welches dem Gasbrenner 1 zugeführt wird.For example, a fan 6 is
Bei einer Wärme- bzw. Leistungsanforderung 15, 16, generiert die Regeleinheit 4 die Steuersignale 17, 18, wodurch die Luftmenge bzw. Gasmenge 10, 11 eingestellt wird. Das Steuersignal 17 steuert z.B. das Gasventil 5 und das Steuersignal 18 steuert das Gebläse 6. Das Signal 19 ist optional und bezeichnet eine Rückmeldung der Gebläsemenge 10.In a heat or
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08166811A EP2177830A1 (en) | 2008-10-16 | 2008-10-16 | Gas burner for a combined gas-air control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08166811A EP2177830A1 (en) | 2008-10-16 | 2008-10-16 | Gas burner for a combined gas-air control system |
Publications (1)
Publication Number | Publication Date |
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EP2177830A1 true EP2177830A1 (en) | 2010-04-21 |
Family
ID=40549877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP08166811A Withdrawn EP2177830A1 (en) | 2008-10-16 | 2008-10-16 | Gas burner for a combined gas-air control system |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3045816A1 (en) * | 2015-01-19 | 2016-07-20 | Siemens Aktiengesellschaft | Device for the control of a burner assembly |
DE202016105039U1 (en) * | 2016-09-12 | 2017-09-14 | Viessmann Werke Gmbh & Co Kg | gas burner |
DE102017128802A1 (en) * | 2017-12-05 | 2019-06-06 | Vaillant Gmbh | Fully premixing gas burner |
WO2019158382A1 (en) | 2018-02-14 | 2019-08-22 | Bekaert Combustion Technology B.V. | Cylindrical premix gas burner |
EP3628924A1 (en) | 2018-09-25 | 2020-04-01 | Polidoro S.p.A. | Variable cross-section distributor device for a premixing burner and burner comprising such distributor |
EP3628923A1 (en) | 2018-09-25 | 2020-04-01 | Polidoro S.p.A. | Distributor device for a premixing burner and burner comprising such distributor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3028909A (en) * | 1956-09-14 | 1962-04-10 | Faure & Cie | Gas burners |
DE8905014U1 (en) * | 1988-04-28 | 1989-06-15 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Device for monitoring the operation of the burner plate of a surface burner |
EP1036984A1 (en) * | 1999-03-18 | 2000-09-20 | G. Kromschröder Aktiengesellschaft | Premix type gas burner |
DE102005056499A1 (en) * | 2005-11-28 | 2007-05-31 | Schott Ag | Gas burner for heating or hot water supply has at least one main load region and at least one monitoring region defined for burner medium and perforated sheet |
-
2008
- 2008-10-16 EP EP08166811A patent/EP2177830A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3028909A (en) * | 1956-09-14 | 1962-04-10 | Faure & Cie | Gas burners |
DE8905014U1 (en) * | 1988-04-28 | 1989-06-15 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Device for monitoring the operation of the burner plate of a surface burner |
EP1036984A1 (en) * | 1999-03-18 | 2000-09-20 | G. Kromschröder Aktiengesellschaft | Premix type gas burner |
EP1036984B1 (en) | 1999-03-18 | 2004-02-18 | G. Kromschröder Aktiengesellschaft | Premix type gas burner |
DE102005056499A1 (en) * | 2005-11-28 | 2007-05-31 | Schott Ag | Gas burner for heating or hot water supply has at least one main load region and at least one monitoring region defined for burner medium and perforated sheet |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3045816A1 (en) * | 2015-01-19 | 2016-07-20 | Siemens Aktiengesellschaft | Device for the control of a burner assembly |
US10054309B2 (en) | 2015-01-19 | 2018-08-21 | Siemens Aktiengesellschaft | Device for regulating a burner system |
DE202016105039U1 (en) * | 2016-09-12 | 2017-09-14 | Viessmann Werke Gmbh & Co Kg | gas burner |
DE102017128802A1 (en) * | 2017-12-05 | 2019-06-06 | Vaillant Gmbh | Fully premixing gas burner |
EP3495735A1 (en) * | 2017-12-05 | 2019-06-12 | Vaillant GmbH | Fully premixing gas burner |
WO2019158382A1 (en) | 2018-02-14 | 2019-08-22 | Bekaert Combustion Technology B.V. | Cylindrical premix gas burner |
EP3628924A1 (en) | 2018-09-25 | 2020-04-01 | Polidoro S.p.A. | Variable cross-section distributor device for a premixing burner and burner comprising such distributor |
EP3628923A1 (en) | 2018-09-25 | 2020-04-01 | Polidoro S.p.A. | Distributor device for a premixing burner and burner comprising such distributor |
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