EP1300632A2 - Gasbrenner mit einer Flammenüberwachung - Google Patents
Gasbrenner mit einer Flammenüberwachung Download PDFInfo
- Publication number
- EP1300632A2 EP1300632A2 EP02022403A EP02022403A EP1300632A2 EP 1300632 A2 EP1300632 A2 EP 1300632A2 EP 02022403 A EP02022403 A EP 02022403A EP 02022403 A EP02022403 A EP 02022403A EP 1300632 A2 EP1300632 A2 EP 1300632A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas burner
- microcontroller
- gas
- signal
- ionization
- 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
Links
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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/725—Protection against flame failure by using flame detection devices
-
- 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
Definitions
- the invention relates to a gas burner with flame monitoring a series connection of ionization electrode, flame and supply voltage, the ionization electrode protruding into the flame, the flame monitor an ionization current to identify the operation of the gas burner emits and the gas supply is adjustable via a gas valve.
- ionization electrodes are used for flame monitoring, which are usually rod-shaped and thus fastened in the combustion chamber are that their tips protrude into the flame area.
- the ionization current is in the control electronics selected and without processing as an input signal to the Control logic fed.
- the control logic only determines whether a current is flowing or does not flow.
- the ionization electrode Since the ionization electrode is constantly in the flame area during operation it shows strong signs of wear. On the one hand, it forms a transverse density on the surface, which acts as an electrical insulator and the ionization current is greatly reduced. On the other hand, the electrode material burns off to reduce the surface area in the flame area and thus also to reduce the ionization current. Reaches the Wear a certain stage, then the ionization current can no longer be evaluated safely.
- the control electronics does not receive a license plate number Presence of the flame more and puts the device out of operation.
- the ionization current as a measurement signal from a signal processing unit with an adjustable gain factor can be fed and forwarded to a microcontroller that the Microcontroller depending on the decrease in the ionization current the gain factor of the signal processing unit during the operating period increased accordingly for safe response of the flame monitoring and that at a predetermined, maximum gain factor, the microcontroller triggers a display error signal.
- the signal conditioning unit with the adjustable gain factor changed with the help of the microcontroller so that the weakening ionization current evaluated safely and forwarded to the control logic as a control signal can be.
- the display error signal is a customer service request for the customer to understand.
- Flame monitoring of this type has various advantages. It will not only the reliability of flame monitoring increases, the likely The time of failure of the ionization electrode can be determined. By timely Customer service request may result in a failure of the burner and the one it operates System can be prevented. The availability of the system is increased and the maintenance intervals for the ionization electrode are based on the actual one Condition of wear of the ionization electrode.
- the System should be provided when the display error signal occurs that the microcontroller with a predetermined, maximum gain factor for the signal processing device the gas valve with a control signal for emergency operation increased gas supply.
- the signal processing unit has a measurement direction and an amplification factor adjustable amplifier.
- a gas burner 10 encloses a combustion chamber with a housing a gas valve 13 a gas volume flow 15 can be supplied.
- the gas volume flow 15 is processed with an air flow 14 to a gas-air mixture, which is supplied to the burner 10 as combustion gas.
- An ionization electrode fastened in the combustion chamber 12 protrudes into the flame area and during operation of the burner 10 into the flame 11.
- the ionization electrode 12 forms with the Flame 11 and a supply voltage a monitoring series circuit, in which an ionization current flows.
- the flame 11 can in this series connection be regarded as a diode with resistance. Because of the signs of wear the ionization electrode 12 changes during the operating period the gas burner 10 also their resistance. The consequence of this is that with increasing operating time the ionization current in the monitoring series connection decreasing more and more.
- the ionization current is used as a measurement signal from a signal processing unit 21 supplied, a measuring device and an adjustable in the gain factor Has amplifier.
- the signal processing unit 21 works with a Microcontroller 22 together so that the gain factor of the amplifier in the signal processing unit 21 as a function of the decrease in time of the Ionization current is increased accordingly so that a reliable evaluation flame monitoring is reached, i.e. from the microcontroller 22 on approximately the same control signal 23 for the gas valve 13 indicates that of the decreasing ionization current is no longer influenced and reliable evaluation - Operation or non-operation of the gas burner 10 - guaranteed.
- a maximum permissible gain factor is specified in the microcontroller 22. If this is reached, this is a sign that the state of wear the ionization electrode 12 has reached a critical value. From this, the microcontroller 22 derives a display error signal 24 which corresponds to the Customer indicates that maintenance of the ionization electrode 12 is appropriate. For further unimpeded emergency operation of the gas burner 10, however, increased control signal 23 also increases the gas supply 15 via the gas valve 13.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
Description
Claims (4)
- Gasbrenner mit einer Flammenüberwachung aus einer Reihenschaltung von lonisationselektrode, Flamme und Versorgungsspannung, wobei die lonisationselektrode in die Flamme ragt, die Flammenüberwachung einen lonisationsstrom zur Kennzeichnung des Betriebes des Gasbrenners abgibt und die Gaszufuhr über eine Gasarmatur einstellbar ist,
dadurch gekennzeichnet, dass der lonisationsstrom als Mess-Signal einer Signalaufbereitungseinheit (21) mit einstellbarem Verstärkungsfaktor zuführbar und an einen Mikrocontroller (22) weiterleitbar ist,
dass der Mikrocontroller (22) in Abhängigkeit von der zeitlichen Abnahme des lonisationsstromes während der Betriebsdauer den Verstärkungsfaktor der Signalverarbeitungseinheit (21) zum sicheren Ansprechen der Flammenüberwachung entsprechend erhöht und
dass bei einem vorgegebenen, maximalen Verstärkungsfaktor der Mikrocontroller (22) ein Anzeige-Fehlersignal (24) auslöst. - Gasbrenner nach Anspruch 1,
dadurch gekennzeichnet, dass der Mikrocontroller (22) bei vorgegebenem, maximalem Verstärkungsfaktor für die Signalaufbereitungseinrichtung (21) der Gasarmatur (13) ein Stellsignal (23) für einen Notbetrieb mit erhöhter Gaszufuhr (15) zuführt. - Gasbrenner nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Signalaufbereitungseinheit (21) eine Messeinrichtung für den lonisationsstrom und einen im Verstärkungsfaktor einstellbaren Verstärker aufweist. - Gasbrenner nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass einer Steuerlogik des vom Gasbrenner bedienten Gerätes das über die Signalaufbereitungseinheit (21) und den Mikrocontroller (22) veränderte Mess-Signal zuführbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001149383 DE10149383C2 (de) | 2001-10-06 | 2001-10-06 | Gasbrenner mit einer Flammenüberwachung |
DE10149383 | 2001-10-06 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1300632A2 true EP1300632A2 (de) | 2003-04-09 |
EP1300632A3 EP1300632A3 (de) | 2004-01-28 |
EP1300632B1 EP1300632B1 (de) | 2008-07-09 |
Family
ID=7701661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20020022403 Expired - Lifetime EP1300632B1 (de) | 2001-10-06 | 2002-10-04 | Gasbrenner mit einer Flammenüberwachung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1300632B1 (de) |
DE (2) | DE10149383C2 (de) |
ES (1) | ES2307694T3 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1519114A1 (de) * | 2003-09-26 | 2005-03-30 | Betronic Design B.V. | Flammenüberwachungssystem |
EP2865946A1 (de) * | 2013-10-23 | 2015-04-29 | Robert Bosch Gmbh | Vorrichtung zum Ermitteln eines Ionisationsstroms einer Flamme |
EP2357410A3 (de) * | 2010-01-28 | 2018-03-14 | Viessmann Werke GmbH & Co KG | Verfahren und Vorrichtung zur auf Ionisationsstrommessung basierenden Flammenerkennung |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016216617A1 (de) | 2016-09-02 | 2018-03-08 | Robert Bosch Gmbh | Verfahren zur Einstellung eines neuen Kalibrierzeitpunktes in einem Heizsystem sowie eine Steuereinheit und ein Heizsystem |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0728991A2 (de) * | 1991-06-28 | 1996-08-28 | Samsung Electronics Co. Ltd. | Kompensationsschaltung für eine Anordnung einer Flammenelektrode |
DE19539568C1 (de) * | 1995-10-25 | 1997-06-19 | Stiebel Eltron Gmbh & Co Kg | Verfahren und Schaltung zur Regelung eines Gasbrenners |
DE19854824C1 (de) * | 1998-11-27 | 2000-06-29 | Stiebel Eltron Gmbh & Co Kg | Verfahren und Schaltung zur Regelung eines Gasbrenners |
DE10003819C1 (de) * | 2000-01-28 | 2001-05-17 | Honeywell Bv | Verfahren zum Betreiben eines Gasbrenners |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19956395A1 (de) * | 1999-11-24 | 2001-06-13 | Honeywell Bv | Verfahren zur Flammenüberwachung bei Gasbrennern sowie entsprechende Vorrichtung |
-
2001
- 2001-10-06 DE DE2001149383 patent/DE10149383C2/de not_active Expired - Fee Related
-
2002
- 2002-10-04 ES ES02022403T patent/ES2307694T3/es not_active Expired - Lifetime
- 2002-10-04 DE DE50212464T patent/DE50212464D1/de not_active Expired - Lifetime
- 2002-10-04 EP EP20020022403 patent/EP1300632B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0728991A2 (de) * | 1991-06-28 | 1996-08-28 | Samsung Electronics Co. Ltd. | Kompensationsschaltung für eine Anordnung einer Flammenelektrode |
DE19539568C1 (de) * | 1995-10-25 | 1997-06-19 | Stiebel Eltron Gmbh & Co Kg | Verfahren und Schaltung zur Regelung eines Gasbrenners |
DE19854824C1 (de) * | 1998-11-27 | 2000-06-29 | Stiebel Eltron Gmbh & Co Kg | Verfahren und Schaltung zur Regelung eines Gasbrenners |
DE10003819C1 (de) * | 2000-01-28 | 2001-05-17 | Honeywell Bv | Verfahren zum Betreiben eines Gasbrenners |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1519114A1 (de) * | 2003-09-26 | 2005-03-30 | Betronic Design B.V. | Flammenüberwachungssystem |
NL1024388C2 (nl) | 2003-09-26 | 2005-03-31 | Betronic Design B V | Vlambewakingssysteem. |
EP2357410A3 (de) * | 2010-01-28 | 2018-03-14 | Viessmann Werke GmbH & Co KG | Verfahren und Vorrichtung zur auf Ionisationsstrommessung basierenden Flammenerkennung |
EP2865946A1 (de) * | 2013-10-23 | 2015-04-29 | Robert Bosch Gmbh | Vorrichtung zum Ermitteln eines Ionisationsstroms einer Flamme |
Also Published As
Publication number | Publication date |
---|---|
DE10149383A1 (de) | 2003-04-24 |
DE50212464D1 (de) | 2008-08-21 |
ES2307694T3 (es) | 2008-12-01 |
EP1300632B1 (de) | 2008-07-09 |
DE10149383C2 (de) | 2003-11-20 |
EP1300632A3 (de) | 2004-01-28 |
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