EP1207346A2 - Flammenwächter für einen mit Öl oder Gas betriebenen Brenner - Google Patents
Flammenwächter für einen mit Öl oder Gas betriebenen Brenner Download PDFInfo
- Publication number
- EP1207346A2 EP1207346A2 EP01126119A EP01126119A EP1207346A2 EP 1207346 A2 EP1207346 A2 EP 1207346A2 EP 01126119 A EP01126119 A EP 01126119A EP 01126119 A EP01126119 A EP 01126119A EP 1207346 A2 EP1207346 A2 EP 1207346A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- flame
- signal
- evaluation circuit
- radiation
- detector according
- 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.)
- Granted
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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
- F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
- F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
Definitions
- the invention relates to a flame detector for an oil or gas operated burner according to the preamble of claim 1.
- From DE 198 09 653 C1 is a flame monitor for bluish burning Flames of an oil or gas burner known to the flame radiation sensing photo sensor, one that rises sharply from ultraviolet to infrared Has sensitivity, and includes a downstream evaluation circuit, the the fuel supply switches off when the radiation is in the range from 200 to 500 nm fails or the increase in the detected radiation intensity above 500 nm Migration from the blue area shows.
- the signal of the Two-channel photo sensor on the one hand, for ultraviolet radiation up to 500 nm and on the other hand, regarding visible and infrared radiation.
- a special photo sensor with a special evaluation is required.
- the object of the invention is a flame detector according to the preamble of claim 1 which provides detection of whether the burner is burning, i.e. a Flame is present in a very simple way.
- Fig. 1 shows a diagram relating to different sizes, plotted compared to the lambda value.
- FIG. 2 schematically shows a circuit diagram for a control device.
- Fig. 3 shows diagrammatically the formation of measured values for the Flickering frequency of the flame radiation.
- a flame from an oil or gas burner burns optimally when a little stoichiometric excess of air is present, i.e. the lambda value is slightly larger than one. If the lambda value continues to increase, the Intensity of the flame radiation too, which also happens when the lambda value falls below one. With a lambda value greater than one shift at Increasing the proportion of combustion air increases the optical frequencies of the Flame radiation to larger values, with a lambda value less than one the optical shifts when the proportion of combustion air is reduced Frequencies of flame radiation at smaller values. In the latter case it increases however, the soot development then also strongly increases (cf. diagram of FIG.
- the photo sensor When using a photo sensor that detects the flame radiation, the has a sensitivity that rises sharply from ultraviolet to infrared, and a downstream evaluation circuit that generates a signal that the over a predetermined time integrated signal of the photosensor with respect to the radiation in the range of longer wavelengths, approximately> 500 nm, one can do that Apply generated signal to Lambda. You then get one burner-specific curve B according to the diagram of FIG. 1.
- the evaluation circuit can the signal from the photo sensor with regard to flicker frequency and / or amplitude of the flame radiation detected evaluate and when determining the emigration of the flame radiation at one Flicker frequency below a predetermined value, a signal to increase of the combustion air portion of the fuel-combustion air mixture and at If the predetermined second value is exceeded, a signal for lowering the Generate combustion air portion of the fuel-combustion air mixture.
- the diagram of FIG. 1 also contains a curve C, the "zero crossings", referred to here as pulsation (Hz) of the signal amplified by an amplifier 1 of the photodetector 2 which detects the flame radiation is plotted opposite Lambda affects. These zero crossings per unit of time essentially correspond the flicker frequency of the flame radiation. These zero crossings are from the Evaluation circuit generated by the DC component of the signal of the Cut off the photo sensor and lay the zero line for the AC component the noise component of the signal is suppressed, i.e. that the dominant Amplitudes remain. The resulting AC signal becomes such amplified, amplifier 3 that as a result of cutting off the upper and lower Sections result in essentially rectangular pulses with varying pulse widths.
- Hz pulsation
- a comparator 4 is expediently used either downstream counter, a shift register and evaluation or one Microprocessor 5 uses the functions of these components and the Generates a shutdown signal in the event of a missing flame.
- Low frequencies of approximately ⁇ 30 Hz can be made in advance by means of a high-pass filter 6 be cut off so that they are not included in the evaluation.
- the limit for a shutdown is relatively small and periods can occur within the predetermined time in which there is no zero crossing is determined
- This type of flame monitoring is extremely simple also no problem with sensitivity adjustment, so that it is extremely is easy to use. Overriding is irrelevant because of this the rectangular pulses are not significantly affected.
- the flame guard can be used with any type of control device for the fuel-combustion air mixture deploy.
- an optical filter in front of the photosensor use that is essentially absorbing in a wavelength range, which corresponds to the radiation from glowing furnace walls (greater than about 900 nm), thus a flickering that can be generated in the absence of flame by the fact that Air is swirled by a fan in the oven, not with the actual one Flickering of a flame is mistaken.
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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)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
Description
Claims (6)
- Flammenwächter für einen mit Öl oder Gas betriebenen Brenner, mit einem die optische Flammenstrahlung und deren Pulsation erfassenden Fotosensor und einer diesem nachgeschalteten Auswerteschaltung, die feststellt, ob die vom Fotosensor empfangene Strahlung der einer brennenden Flamme entspricht und bei negativem Ergebnis ein Abschaltsignal für die Brennstoffzufuhr erzeugt, dadurch gekennzeichnet, daß die Auswerteschaltung die Zahl der Nulldurchgänge des bearbeiteten Signals des Fotosensors innerhalb einer vorbestimmten Zeiteinheit bestimmt und mit einem vorbestimmten Grenzwert vergleicht, bei dessen Unterschreiten ein Abschaltsignal für die Brennstoffzufuhr erzeugt wird, wobei das Signal des Fotosensors vom Gleichspannungsanteil und Rauschen befreit durch entsprechendes Verstärken zu Rechteckimpulsen verarbeitet ist.
- Flammenwächter nach Anspruch 1, dadurch gekennzeichnet, daß die auf- oder absteigenden Flanken des Signals von der Auswerteschaltung zählbar sind.
- Flammenwächter nach Anspruch 2, dadurch gekennzeichnet, daß die Auswerteschaltung einen Komparator mit nachgeschaltetem Zähler aufweist.
- Flammenwächter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die vorbestimmte Zeiteinheit von der Auswerteschaltung in eine Vielzahl von Abschnitten unterteilt ist, wobei die Zahl der Nulldurchgänge am Ende jedes Abschnitts bestimmt wird.
- Flammenwächter nach Anspruch 4, dadurch gekennzeichnet, daß die Abschnitte einen Bruchteil der geforderten Brennerabschaltzeit beim Feststellen fehlender Flamme bilden.
- Flammenwächter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß dem Fotosensor ein optisches Filter vorgeschaltet ist, das im wesentlichen Strahlung entsprechend derjenigen von glühenden Ofenwänden absorbiert.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10055831 | 2000-11-11 | ||
DE10055831A DE10055831C2 (de) | 2000-11-11 | 2000-11-11 | Flammenwächter für einen mit Öl oder Gas betriebenen Brenner |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1207346A2 true EP1207346A2 (de) | 2002-05-22 |
EP1207346A3 EP1207346A3 (de) | 2004-05-06 |
EP1207346B1 EP1207346B1 (de) | 2007-08-15 |
Family
ID=7662877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01126119A Expired - Lifetime EP1207346B1 (de) | 2000-11-11 | 2001-11-03 | Flammenwächter für einen mit Öl oder Gas betriebenen Brenner |
Country Status (4)
Country | Link |
---|---|
US (1) | US6700495B2 (de) |
EP (1) | EP1207346B1 (de) |
AT (1) | ATE370372T1 (de) |
DE (2) | DE10055831C2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004051083B3 (de) * | 2004-10-19 | 2006-01-05 | Bfi Automation Dipl.-Ing. Kurt-Henry Mindermann Gmbh | Flammenwächter |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1665930A1 (de) | 2001-11-01 | 2006-06-07 | Integrated Biosystems Inc. | Vorrichtung und Verfahren zum Einfrieren und zur Lagreung von biopharmazeutischem Material |
EP2105669B1 (de) | 2008-03-26 | 2016-01-06 | BFI Automation Mindermann GmbH | Flammenueberwachungs- und Bewertungseinrichtung |
ES2381512B1 (es) * | 2009-06-04 | 2013-05-07 | Coprecitec, S.L | Aparato domestico a gas con control de llama |
US8177544B2 (en) | 2010-04-09 | 2012-05-15 | Honeywell International Inc. | Selective lockout in a fuel-fired appliance |
US9388984B2 (en) | 2010-04-09 | 2016-07-12 | Honeywell International Inc. | Flame detection in a fuel fired appliance |
US8523560B2 (en) | 2010-04-09 | 2013-09-03 | Honeywell International Inc. | Spark detection in a fuel fired appliance |
PL2439451T3 (pl) * | 2010-10-08 | 2014-06-30 | Bfi Automation Mindermann Gmbh | Urządzenie do wykrywania obecności płomienia |
US9863813B2 (en) | 2012-04-13 | 2018-01-09 | General Electric Company | Flame sensor |
US9494320B2 (en) | 2013-01-11 | 2016-11-15 | Honeywell International Inc. | Method and system for starting an intermittent flame-powered pilot combustion system |
US10208954B2 (en) | 2013-01-11 | 2019-02-19 | Ademco Inc. | Method and system for controlling an ignition sequence for an intermittent flame-powered pilot combustion system |
US11619384B2 (en) * | 2017-04-24 | 2023-04-04 | General Electric Technology Gmbh | System and method for operating a combustion chamber |
US11236930B2 (en) | 2018-05-01 | 2022-02-01 | Ademco Inc. | Method and system for controlling an intermittent pilot water heater system |
US11656000B2 (en) | 2019-08-14 | 2023-05-23 | Ademco Inc. | Burner control system |
US11739982B2 (en) | 2019-08-14 | 2023-08-29 | Ademco Inc. | Control system for an intermittent pilot water heater |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19746786A1 (de) | 1997-10-23 | 1999-04-29 | Giersch Gmbh Oel Und Gasbrenne | Optischer Flammenwächter |
DE19809653C1 (de) | 1998-03-06 | 1999-09-16 | Giersch Gmbh | Flammenwächter |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2823410A1 (de) * | 1978-04-25 | 1979-11-08 | Cerberus Ag | Flammenmelder |
US4280184A (en) * | 1979-06-26 | 1981-07-21 | Electronic Corporation Of America | Burner flame detection |
DD261199A1 (de) * | 1985-12-23 | 1988-10-19 | Geraete & Regler Werke Veb | Wechselstrahlungsflammenwaechter mit stoersignalunterdrueckung |
US5126721A (en) * | 1990-10-23 | 1992-06-30 | The United States Of America As Represented By The United States Department Of Energy | Flame quality monitor system for fixed firing rate oil burners |
US5424554A (en) * | 1994-03-22 | 1995-06-13 | Energy Kenitics, Inc. | Oil-burner, flame-intensity, monitoring system and method of operation with an out of range signal discriminator |
DE19650972C2 (de) * | 1996-12-09 | 2001-02-01 | Elbau Elektronik Bauelemente G | Verfahren und Anordnung zur Überwachung und Regelung von Verbrennungsprozessen |
US6261086B1 (en) * | 2000-05-05 | 2001-07-17 | Forney Corporation | Flame detector based on real-time high-order statistics |
-
2000
- 2000-11-11 DE DE10055831A patent/DE10055831C2/de not_active Expired - Lifetime
-
2001
- 2001-11-03 DE DE50112856T patent/DE50112856D1/de not_active Expired - Lifetime
- 2001-11-03 EP EP01126119A patent/EP1207346B1/de not_active Expired - Lifetime
- 2001-11-03 AT AT01126119T patent/ATE370372T1/de not_active IP Right Cessation
- 2001-11-09 US US10/005,488 patent/US6700495B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19746786A1 (de) | 1997-10-23 | 1999-04-29 | Giersch Gmbh Oel Und Gasbrenne | Optischer Flammenwächter |
DE19809653C1 (de) | 1998-03-06 | 1999-09-16 | Giersch Gmbh | Flammenwächter |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004051083B3 (de) * | 2004-10-19 | 2006-01-05 | Bfi Automation Dipl.-Ing. Kurt-Henry Mindermann Gmbh | Flammenwächter |
Also Published As
Publication number | Publication date |
---|---|
DE10055831C2 (de) | 2002-11-21 |
ATE370372T1 (de) | 2007-09-15 |
US20020081545A1 (en) | 2002-06-27 |
US6700495B2 (en) | 2004-03-02 |
DE10055831A1 (de) | 2002-05-29 |
EP1207346B1 (de) | 2007-08-15 |
EP1207346A3 (de) | 2004-05-06 |
DE50112856D1 (de) | 2007-09-27 |
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