EP1351019A2 - Process to check the operation of the regulation system of heating burner - Google Patents

Process to check the operation of the regulation system of heating burner Download PDF

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Publication number
EP1351019A2
EP1351019A2 EP03005702A EP03005702A EP1351019A2 EP 1351019 A2 EP1351019 A2 EP 1351019A2 EP 03005702 A EP03005702 A EP 03005702A EP 03005702 A EP03005702 A EP 03005702A EP 1351019 A2 EP1351019 A2 EP 1351019A2
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EP
European Patent Office
Prior art keywords
pressure switch
air
fuel
blower
signal
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
Application number
EP03005702A
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German (de)
French (fr)
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EP1351019A3 (en
EP1351019B1 (en
Inventor
Wilfried Dr. Hangauer
Siegfried Stampfl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Schweiz AG
Original Assignee
Siemens Building Technologies AG
Siemens Schweiz AG
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Publication of EP1351019A2 publication Critical patent/EP1351019A2/en
Publication of EP1351019A3 publication Critical patent/EP1351019A3/en
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Publication of EP1351019B1 publication Critical patent/EP1351019B1/en
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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
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/06—Regulating fuel supply conjointly with draught
    • F23N1/062—Regulating fuel supply conjointly with draught using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/184—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/10—Fail safe for component failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/02—Ventilators in stacks
    • F23N2233/04—Ventilators in stacks with variable speed

Definitions

  • the invention relates to a method according to the preamble of claim 1 and one Device for performing the method.
  • Atmospheric gas burners with no air ratio adjustment are generally for the designed intermittent operation, the sizes of the fuel and Air flow determined as a function of a power request signal that the desired service is provided.
  • the Power request signal can be, for example, from a temperature controller be generated.
  • the air volume flow provided for the combustion is here generally not continuously updated, i.e. that the amount of air is approximately is constant and is normally designed for the maximum burner output.
  • the air volume flow can, for example, by means of a Pressure switch are monitored.
  • the pressure switch can be parallel to one Air resistance can be switched in the air duct.
  • the pressure switch measures that Pressure difference across the air resistance and thus the air flow in the duct.
  • the Pressure switch thus functions as an air flow tester, whose contacts sufficient air flow are closed. It is important that the Pressure switch works reliably and fail-safe.
  • the air volume flow becomes the Track the amount of fuel so that there is optimal combustion can the influencing of the air volume flow by an actuator e.g. by means of a Air flap or by varying the speed of an exhaust gas or fresh air blower respectively.
  • External influences can also occur with such burners, for example due to contamination, corrosion or a foreign body in the exhaust duct Air volume flow and thus falsify the required performance and air ratio.
  • Controlling or regulating the fan speed can only cause such external influences be compensated conditionally. Therefore, monitoring the actual To prefer air volume flow.
  • the document DE-A1-4429157 shows the monitoring of a generally usable Regulation.
  • the signal change of the control sensor as a result of controlled, controlled change of an actuator in the control loop.
  • EP-A-909922 discloses a combustion chamber with one therein located air pressure sensor, the signal of which is a measure of the ventilation.
  • the sensor signal becomes a target signal regulated by a higher-level flame quality control by means of measurement is generated at an ionization electrode. If the sensor signal is due to External influences or drift phenomena become inaccurate in the long term, that could be Flame quality control based on the ionization electrode the resulting Determine deviation of the air ratio and the target signal according to a Adjust optimization of flame quality.
  • the settings of the Flame quality control indirectly depend on the sensor signal again, whereby possible external influences still to a certain extent the flame quality and Air flow.
  • the invention is therefore based on the object without monitoring the Flame signal or the fan speed, a reliable and accurate Check the function of the control system at one To allow heating burners.
  • the method according to the invention is based on the Actual burner activation to put the air control loop into operation in which a Control setpoint is given that is at least the maximum value or above Maximum value of the normal operating range of the burner is. That then itself setting control result, e.g. the resulting volume flow rate queried by means of a differential pressure switch and regarding its correctness rated. Only when this check has taken place is the burner for the Normal operation released.
  • all components of the control loop can in a simple manner when the burner starts up with regard to its perfect function be checked.
  • the phase control of the Blower, the blower itself, the pressure sensor, the modulator stage for example executed as a gas actuator and called the pressure switch.
  • the Switch-off point of the pressure switch is preferably above the chimney draft maximum air volume flow. Because the Air volume flow monitoring by a parallel to the pressure sensor switched pressure switch takes place, the monitoring of the air volume flow in simple way, i.e. without the need for a speed signal or a flame signal will be done.
  • the pressure switch is working properly by pressing the Rest position (pressure switch switched off) is determined before the air control loop, i.e. the fan is switched on. If the pressure switch is not in the rest position the fan is not switched on and the burner remains out of operation.
  • the only figure shows schematically an atmospheric gas burner with a Combustion chamber 1, in which a fan 2 is arranged.
  • An air control signal 3 controls and influences the speed of the fan drive via an air actuator 4 thus the air volume flow in an exhaust duct 5.
  • Air resistance 6 e.g. available in the form of a throttle element, as well as upstream or downstream of the throttle element, pressure tapping points are provided, which with a pressure sensor 8 and an air flow tester, for example in the form of a Pressure switch 7, which is connected in parallel to the pressure sensor 8, are connected.
  • the pressure switch 7 generates an air test signal 9 and the pressure sensor 8 on Air sensor signal 10.
  • the air test signal 9 and the air sensor signal 10 become one Control device 11 supplied, which the air control signal 3 for the blower 2 and generates a fuel control signal 12 for the fuel actuator 14.
  • the Fuel actuator 14 controls the fuel flow in a gas line 13 by means of a modulated gas valve 15.
  • the control device 11 can generate an enable signal 16, which is a Safety valve 17 in gas line 13 opens.
  • the control device 11 generates the release signal 16, for example by means of a Safety device 21 which e.g. in a burner control, not shown can be included.
  • the monitoring of the air volume flow according to the invention takes place each time the burner is started.
  • the safety device 21 before the fuel is released, the safety device 21 generates a control setpoint 23, which is, for example, 120% of the maximum air volume flow in normal operation of the burner. If the air control circuit is functioning correctly and the ventilation is not faulty, the pressure switch 7 will now close due to the pressure drop across the air resistance 6. In the meantime, the safety device 21 compares the air test signal 9 with a reference value which corresponds to the closed state of the pressure switch 7. If the pressure switch is closed or switched on, this is detected by the safety device 21, with which the test is completed and the burner can be released for operation.
  • the safety device 21 can be closed after the Pressure switch 7 monitor whether the pressure switch 7 during the subsequent Shutting down the speed of the blower 2 opens again. This also allows the Function of the pressure switch can be checked.
  • the control device 11 only starts an ignition process for starting the burner if the above-mentioned processes run without errors.
  • the gas line 13 is released for a fuel flow.
  • the function test is preferably carried out before normal operation, ie before valve 17 is opened and only when the function test has been completed without errors, fuel valve 17 is then opened and the burner can then be brought into normal operation.
  • a power request signal 20 which can originate, for example, from a higher-level temperature controller, causes the safety device 21 to open the gas valve 15 accordingly via the fuel control signal 12.
  • the safety device 21 provides an air target signal 23 via a correspondingly stored characteristic curve 22.
  • the target air signal 23 is fed to an air regulator 24, which then regulates the air sensor signal 10 by generating the air control signal 3.
  • the air regulator 24 can, for example, carry out a PI / PID control.
  • a pump 18 then transports this during normal operation of the burner heating water arranged in the combustion chamber 1 Heat exchanger 19.

Abstract

The controller (11) is operated at a desired control value corresponding with a volumetric airflow. This is equal to, or exceeds the maximum airflow in normal use. A pressure switch (7) is monitored, to determine whether it has switched over from its normal position. The fuel supply actuator (14) is not operated to take the burners into operation, until after switching (7) occurs. An Independent claim is included for the equipment required.

Description

Die Erfindung betrifft ein Verfahren gemäss dem Oberbegriff des Anspruchs 1 und eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method according to the preamble of claim 1 and one Device for performing the method.

Atmosphärische Gasbrenner ohne Luftzahlanpassung sind im allgemeinen für den intermittierenden Betrieb ausgelegt, wobei die Grössen der Brennstoff- und Luftströmung in Abhängigkeit von einem Leistungsanforderungssignal so bestimmt werden, dass die jeweils gewünschte Leistung erbracht wird. Das Leistungsanforderungssignal kann hierbei beispielsweise von einem Temperaturregler erzeugt werden. Der für die Verbrennung vorgesehene Luftvolumenstrom wird hierbei im allgemeinen nicht kontinuierlich nachgeführt, d.h. dass die Luftmenge annähernd konstant ist und normalerweise für die maximale Brennerleistung ausgelegt wird.Atmospheric gas burners with no air ratio adjustment are generally for the designed intermittent operation, the sizes of the fuel and Air flow determined as a function of a power request signal that the desired service is provided. The Power request signal can be, for example, from a temperature controller be generated. The air volume flow provided for the combustion is here generally not continuously updated, i.e. that the amount of air is approximately is constant and is normally designed for the maximum burner output.

Bei solchen Brennern kann der Luftvolumenstrom beispielsweise mittels eines Druckschalters überwacht werden. Der Druckschalter kann hierbei parallel zu einem Luftwiderstand im Luftkanal geschaltet werden. Der Druckschalter misst die Druckdifferenz über den Luftwiderstand und somit die Luftströmung im Kanal. Der Druckschalter funktioniert somit als Luftströmungsprüfer, dessen Kontakte bei ausreichendem Luftvolumenstrom geschlossen sind. Dabei ist es wichtig, dass der Druckschalter zuverlässig und fehlersicher arbeitet.In such burners, the air volume flow can, for example, by means of a Pressure switch are monitored. The pressure switch can be parallel to one Air resistance can be switched in the air duct. The pressure switch measures that Pressure difference across the air resistance and thus the air flow in the duct. The Pressure switch thus functions as an air flow tester, whose contacts sufficient air flow are closed. It is important that the Pressure switch works reliably and fail-safe.

Bei Brennern mit einer Luftzahlanpassung wird der Luftvolumenstrom der Brennstoffmenge so nachgeführt, dass sich eine optimale Verbrennung ergibt.Dabei kann die Beeinflussung des Luftvolumenstroms durch ein Stellglied z.B. mittels einer Luftklappe oder durch Variation der Drehzahl eines Abgas- oder Frischluftgebläses erfolgen. Auch bei solchen Brennern können Fremdeinwirkungen beispielsweise aufgrund von Verschmutzung, Korrosion oder eines Fremdkörpers im Abgaskanal, den Luftvolumenstrom und damit die geforderte Leistung und Luftzahl verfälschen. Durch Steuerung bzw. Regelung der Gebläsedrehzahl können solche Fremdeinflüsse nur bedingt kompensiert werden. Daher ist eine Überwachung des tatsächlichen Luftvolumenstroms zu bevorzugen.For burners with an air ratio adjustment, the air volume flow becomes the Track the amount of fuel so that there is optimal combustion can the influencing of the air volume flow by an actuator e.g. by means of a Air flap or by varying the speed of an exhaust gas or fresh air blower respectively. External influences can also occur with such burners, for example due to contamination, corrosion or a foreign body in the exhaust duct Air volume flow and thus falsify the required performance and air ratio. By Controlling or regulating the fan speed can only cause such external influences be compensated conditionally. Therefore, monitoring the actual To prefer air volume flow.

Die Druckschrift DE-A1-4429157 zeigt die Überwachung einer generell einsetzbaren Regelung. Dazu wird die Signaländerung des Regelsensors infolge einer angesteuerten, festen Änderung eines Aktors im Regelkreis überwacht. The document DE-A1-4429157 shows the monitoring of a generally usable Regulation. For this purpose, the signal change of the control sensor as a result of controlled, controlled change of an actuator in the control loop.

Die Druckschrift EP-A-909922 offenbart eine Verbrennungskammer mit einem darin befindlichen Luftdrucksensor, dessen Signal ein Mass für die Durchlüftung ist. Durch Variation der Gebläsedrehzahl wird hierbei das Sensorsignal auf ein Sollsignal abgeregelt, das durch eine übergeordnete Flammenqualitätsregelung mittels Messung an einer lonisationselektrode erzeugt wird. Sollte das Sensorsignal aufgrund von Fremdeinwirkungen oder Drifterscheinungen langfristig ungenau werden, so könnte die Flammenqualitätsregelung basierend auf der lonisationselektrode die resultierende Abweichung der Luftzahl feststellen und das Sollsignal entsprechend einer Optimierung der Flammenqualität anpassen. Jedoch würden hier die Einstellungen der Flammenqualitätsregelung indirekt wieder vom Sensorsignal abhängen, wodurch etwaige Fremdeinwirkungen immer noch gewissermassen die Flammenqualität und Luftströmung beeinträchtigen könnten.EP-A-909922 discloses a combustion chamber with one therein located air pressure sensor, the signal of which is a measure of the ventilation. By Varying the fan speed, the sensor signal becomes a target signal regulated by a higher-level flame quality control by means of measurement is generated at an ionization electrode. If the sensor signal is due to External influences or drift phenomena become inaccurate in the long term, that could be Flame quality control based on the ionization electrode the resulting Determine deviation of the air ratio and the target signal according to a Adjust optimization of flame quality. However, the settings of the Flame quality control indirectly depend on the sensor signal again, whereby possible external influences still to a certain extent the flame quality and Air flow.

Der Erfindung liegt somit die Aufgabe zugrunde, ohne Überwachung des Flammensignals bzw. der Gebläsedrehzahl, eine zuverlässige und genaue Überprüfung der Funktion des Steuerungs-/Regelungssystem bei einem Heizungsbrenner zu ermöglichen.The invention is therefore based on the object without monitoring the Flame signal or the fan speed, a reliable and accurate Check the function of the control system at one To allow heating burners.

Die genannte Aufgabe wird erfindungsgemäss durch die Merkmale des Anspruchs 1 gelöst.According to the invention, the stated object is achieved by the features of claim 1 solved.

Mit anderen Worten beruht das erfindungsgemässe Verfahren darauf, vor der eigentlichen Brennereinschaltung den Luftregelkreis in Betrieb zu nehmen, in dem ein Regelsollwert aufgegeben wird, der wenigstens dem Maximalwert oder über dem Maximalwert des normalen Betriebsbereiches des Brenners liegt. Das daraufhin sich einstellende Regelungsergebnis, z.B. die sich einstellende Volumenstromgrösse, wird mittels eines Differenzdruckschalters abgefragt und hinsichtlich seiner Korrektheit bewertet. Erst wenn diese Überprüfung stattgefunden hat, wird der Brenner für den Normalbetrieb freigegeben.In other words, the method according to the invention is based on the Actual burner activation to put the air control loop into operation in which a Control setpoint is given that is at least the maximum value or above Maximum value of the normal operating range of the burner is. That then itself setting control result, e.g. the resulting volume flow rate queried by means of a differential pressure switch and regarding its correctness rated. Only when this check has taken place is the burner for the Normal operation released.

Durch das erfindungsgemässe Verfahren können alle Komponenten des Regelkreises auf einfache Weise beim Anlauf des Brenners hinsichtlich ihrer einwandfreien Funktion überprüft werden. Beispielsweise seien hier die Phasenanschnittssteuerung des Gebläses, das Gebläse selbst, der Drucksensor, die Modulatorstufe, beispielsweise ausgeführt als Gasstellglied und der Druckschalter genannt.By means of the method according to the invention, all components of the control loop can in a simple manner when the burner starts up with regard to its perfect function be checked. For example, the phase control of the Blower, the blower itself, the pressure sensor, the modulator stage, for example executed as a gas actuator and called the pressure switch.

Funktionsfehler, die während des Normalbetriebs auftreten, werden bei der nächsten Inbetriebnahme des Brenners festgestellt. Malfunctions that occur during normal operation are the next Commissioning of the burner determined.

Damit der Brenner auch bei natürlichem Kaminzug starten kann, sollte der Ausschaltpunkt des Druckschalters vorzugsweise oberhalb des bei Kaminzug sich maximal einstellenden Luftvolumenstroms liegen. Dadurch dass die Luftvolumenströmungsüberwachung durch einen parallel zum Drucksensor geschalteten Druckschalter erfolgt, kann die Überwachung des Luftvolumenstroms in einfacher Weise, d.h. ohne dass ein Drehzahlsignal bzw. ein Flammensignal benötigt wird, erfolgen.So that the burner can also start with a natural chimney draft, the Switch-off point of the pressure switch is preferably above the chimney draft maximum air volume flow. Because the Air volume flow monitoring by a parallel to the pressure sensor switched pressure switch takes place, the monitoring of the air volume flow in simple way, i.e. without the need for a speed signal or a flame signal will be done.

Vorzugsweise wird vor der Inbetriebnahme des Brenners bzw. vor der Inbetriebnahme des Gebläses die einwandfreie Funktion des Druckschalters überprüft, indem die Ruhelage (Druckschalter ausgeschaltet) festgestellt wird, bevor der Luftregelkreis, d.h. das Gebläse eingeschaltet wird. Befindet sich der Druckschalter nicht in der Ruhelage so unterbleibt die Einschaltung des Gebläses und der Brenner bleibt ausser Betrieb.Preferably, before the burner is started up or before the start up of the fan checks that the pressure switch is working properly by pressing the Rest position (pressure switch switched off) is determined before the air control loop, i.e. the fan is switched on. If the pressure switch is not in the rest position the fan is not switched on and the burner remains out of operation.

Weitere Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung anhand der Figur und aus den Patentansprüchen.Further advantages of the invention result from the following description based on the figure and from the claims.

Die einzige Figur zeigt schematisch einen atmosphärischen Gasbrenner mit einer Verbrennungskammer 1, in der ein Gebläse 2 angeordnet ist. Ein Luftstellsignal 3 steuert über ein Luftstellglied 4 die Drehzahl des Gebläseantriebs und beeinflusst somit den Luftvolumenstrom in einem Abgaskanal 5. Im Abgaskanal 5 ist ein Luftwiderstand 6, z.B. in Form eines Drosselglieds vorhanden, sowie stromaufwärts bzw. stromabwärts des Drosselgliedes sind Druckentnahmestellen vorgesehen, die mit einem Drucksensor 8 und einem Luftströmungsprüfer,beispielsweise in Form eines Druckschalters 7, der parallel zu dem Drucksensor 8 geschaltet ist, verbunden sind. Der Druckschalter 7 erzeugt ein Luftprüfungssignal 9 und der Drucksensor 8 ein Luftsensorsignal 10.The only figure shows schematically an atmospheric gas burner with a Combustion chamber 1, in which a fan 2 is arranged. An air control signal 3 controls and influences the speed of the fan drive via an air actuator 4 thus the air volume flow in an exhaust duct 5. There is a in the exhaust duct 5 Air resistance 6, e.g. available in the form of a throttle element, as well as upstream or downstream of the throttle element, pressure tapping points are provided, which with a pressure sensor 8 and an air flow tester, for example in the form of a Pressure switch 7, which is connected in parallel to the pressure sensor 8, are connected. The pressure switch 7 generates an air test signal 9 and the pressure sensor 8 on Air sensor signal 10.

Das Luftprüfungssignal 9 und das Luftsensorsignal 10 werden einer Regeleinrichtung 11 zugeführt, die daraus das Luftstellsignal 3 für das Gebläse 2 und ein Brennstoffstellsignal 12 für das Brennstoffstellglied 14 erzeugt. Das Brennstoffstellglied 14 steuert hierbei die Brennstoffströmung in einer Gasleitung 13 mittels eines modulierten Gasventils 15.The air test signal 9 and the air sensor signal 10 become one Control device 11 supplied, which the air control signal 3 for the blower 2 and generates a fuel control signal 12 for the fuel actuator 14. The Fuel actuator 14 controls the fuel flow in a gas line 13 by means of a modulated gas valve 15.

Die Regeleinrichtung 11 kann ein Freigabesignal 16 erzeugen, das ein Sicherheitsventil 17 in der Gasleitung 13 öffnet. The control device 11 can generate an enable signal 16, which is a Safety valve 17 in gas line 13 opens.

Die Regeleinrichtung 11 erzeugt das Freigabesignal 16 beispielsweise mittels einer Sicherheitseinrichtung 21, die z.B. in einem nicht dargestellten Feuerungsautomaten enthalten sein kann.The control device 11 generates the release signal 16, for example by means of a Safety device 21 which e.g. in a burner control, not shown can be included.

Die erfindungsgemässe Überwachung des Luftvolumenstroms findet jedesmal beim Aufstarten des Brenners statt. Dazu erzeugt noch vor Freigabe des Brennstoffes die Sicherheitseinrichtung 21 einen Regelsollwert 23, der beispielsweise 120 % des maximalen Luftvolumenstroms im Normalbetrieb des Brenners beträgt.
Bei einem fehlerfrei funktionierenden Luftregelkreis und störungsfreier Durchlüftung wird jetzt der Druckschalter 7 wegen des Druckabfalls über dem Luftwiderstand 6 schliessen. Währenddessen vergleicht die Sicherheitseinrichtung 21 das Luftprüfungssignal 9 mit einem Referenzwert, der dem geschlossenen Zustand des Druckschalters 7 entspricht. Wenn der Druckschalter geschlossen bzw. eingeschaltet ist, wird dies durch die Sicherheitseinrichtung 21 erfasst, womit die Prüfung abgeschlossen ist und der Brenner zum Betrieb freigegeben werden kann.The monitoring of the air volume flow according to the invention takes place each time the burner is started. For this purpose, before the fuel is released, the safety device 21 generates a control setpoint 23, which is, for example, 120% of the maximum air volume flow in normal operation of the burner.
If the air control circuit is functioning correctly and the ventilation is not faulty, the pressure switch 7 will now close due to the pressure drop across the air resistance 6. In the meantime, the safety device 21 compares the air test signal 9 with a reference value which corresponds to the closed state of the pressure switch 7. If the pressure switch is closed or switched on, this is detected by the safety device 21, with which the test is completed and the burner can be released for operation.

Weiterhin kann die Sicherheitseinrichtung 21 nach vorhergehender Schliessung des Druckschalters 7 überwachen, ob der Druckschalter 7 beim anschliessenden Herunterfahren der Drehzahl des Gebläses 2 wieder öffnet. Dadurch kann auch die Funktion des Druckschalters überprüft werden.Furthermore, the safety device 21 can be closed after the Pressure switch 7 monitor whether the pressure switch 7 during the subsequent Shutting down the speed of the blower 2 opens again. This also allows the Function of the pressure switch can be checked.

Nur wenn die oben genannten Vorgänge fehlerlos ablaufen, startet die Regeleinrichtung 11 ein Zündverfahren zur Inbetriebnahme des Brenners. Hierzu wird die Gasleitung 13 für eine Brennstoffströmung freigegeben.
Vorzugsweise erfolgt der Funktionstest vor dem Normalbetrieb, d.h. vor Öffnen des Ventils 17 und nur wenn der Funktionstest fehlerfrei abgeschlossen ist wird dann das Brennstoffventil 17 geöffnet, und der Brenner kann dann in den Normalbetrieb gefahren werden.The control device 11 only starts an ignition process for starting the burner if the above-mentioned processes run without errors. For this purpose, the gas line 13 is released for a fuel flow.
The function test is preferably carried out before normal operation, ie before valve 17 is opened and only when the function test has been completed without errors, fuel valve 17 is then opened and the burner can then be brought into normal operation.

Im Normalbetrieb des Brenners veranlasst ein Leistungsanforderungssignal 20, das beispielsweise von einem übergeordneten Temperaturregler stammen kann, die Sicherheitseinrichtung 21 dazu, über das Brennstoffstellsignal 12 das Gasventil 15 entsprechend zu öffnen. Zudem stellt die Sicherheitseinrichtung 21 über eine entsprechend gespeicherte Kennlinie 22 ein Luftsollsignal 23 bereit.
Das Luftsollsignal 23 wird einem Luftregler 24 zugeführt, der durch Erzeugung des Luftstellsignals 3 das Luftsensorsignal 10 daraufhin abregelt. Der Luftregler 24 kann beispielsweise eine PI-/PID-Regelung ausführen. In normal operation of the burner, a power request signal 20, which can originate, for example, from a higher-level temperature controller, causes the safety device 21 to open the gas valve 15 accordingly via the fuel control signal 12. In addition, the safety device 21 provides an air target signal 23 via a correspondingly stored characteristic curve 22.
The target air signal 23 is fed to an air regulator 24, which then regulates the air sensor signal 10 by generating the air control signal 3. The air regulator 24 can, for example, carry out a PI / PID control.

Während des Normalbetriebs des Brenners transportiert dann eine Pumpe 18 das zu heizende Wasser durch einen im Verbrennungsraum 1 angeordneten Wärmetauscher 19.A pump 18 then transports this during normal operation of the burner heating water arranged in the combustion chamber 1 Heat exchanger 19.

Claims (6)

Verfahren zur Funktionsüberprüfung eines Steuerungs-/Regelungssystems eines Heizungsbrenners mit einer Verbrennungskammer (1), die über ein steuerbares Gebläse (2) mit einem Luftkanal (5) verbunden ist, wobei im Normalbetrieb die Verbrennungskammer (1) über ein steuerbares Brennstoffstellglied (14) mit Brennstoff versorgt wird und mit einem Differenzdrucksensor (8) und einem dazu parallel geschalteten Druckschalter (7), wobei der Differenzdrucksensor (8) ein Luftsensorsignal (10) und der Druckschalter (7) ein Luftprüfungssignal (9) erzeugt, die einer elektronischen Regeleinrichtung (11) zugeführt werden, die daraus ein Luftstellsignal (3) für das Gebläse und ein Brennstoffstellsignal (12) zur Betätigung des Brennstoffstellgliedes (14) erzeugt, dadurch gekennzeichnet, dass die Funktionsüberprüfung dadurch erfolgt, dass die Regeleinrichtung (11) mit einem Regelsollwert beaufschlagt wird, der wenigstens dem beim Normalbetrieb sich einstellenden maximalen Luftvolumenstrom entspricht oder grösser als der maximale Luftvolumenstrom ist, und dass der in einer Ruhestellung befindliche Druckschalter (7) daraufhin überwacht wird, ob dieser geschaltet hat und dass die Freigabe des Brennstoffstellgliedes (14) erst nach dem Schalten des Druckschalters (7) erfolgt, wodurch der Brenner in Betrieb genommen werden kann.Method for checking the function of a control system of a heating burner with a combustion chamber (1) which is connected to an air duct (5) via a controllable fan (2), the combustion chamber (1) being connected via a controllable fuel actuator (14) during normal operation Fuel is supplied and with a differential pressure sensor (8) and a pressure switch (7) connected in parallel thereto, the differential pressure sensor (8) generating an air sensor signal (10) and the pressure switch (7) generating an air test signal (9) which is sent to an electronic control device (11 ) are supplied, which generates an air control signal (3) for the blower and a fuel control signal (12) for actuating the fuel control element (14), characterized in that the function check is carried out by applying a control setpoint to the control device (11), the at least the maximum air volume flow that arises during normal operation is correct or greater than the maximum air volume flow, and that the pressure switch (7), which is in a rest position, is monitored to determine whether it has switched and that the fuel actuator (14) is only released after the pressure switch (7) is switched, so that Burner can be put into operation. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass vor Inbetriebnahme des Gebläses (2) durch eine Sicherheitseinrichtung (21) überprüft wird, ob der Druckschalter (7) sich in seiner Ruhestellung befindet und nach Inbetriebnahme des Gebläses die Sicherheitseinrichtung (21) eine Rückmeldung abgibt, ob der Druckschalter (7) in die Arbeitsstellung geschaltet hat.Method according to Claim 1, characterized in that, before the blower (2) is started up, a safety device (21) is used to check whether the pressure switch (7) is in its rest position and after the blower has been started up, the safety device (21) provides feedback, whether the pressure switch (7) has switched to the working position. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die Sicherheitseinrichtung (21) bei fehlerfreiem Ablauf der Prüfvorgänge ein Freigabesignal (16) erzeugt, wodurch ein Sicherheitsventil (17) den Brennstoff für den Brenner freigegibt.A method according to claim 2, characterized in that the safety device (21) generates a release signal (16) when the test processes run correctly, whereby a safety valve (17) releases the fuel for the burner. Vorrichtung zur Durchführung des Verfahrens gemäss Anspruch 1 bis 3 mit einem Luftstellglied (4) mittels dem die Drehzahl eines Gebläses (2) gesteuert wird, wobei das Gebläse (2) mit einem Luftkanal (5) verbunden ist und einem Brennstoffstellglied (14), mittels dem im Normalbetrieb die Brennstoffzufuhr zu einer Verbrennungskammer (1) gesteuert wird und dass der Luftkanal (5) mit einem Differenzdrucksensor (8) und einem dazu parallel geschalteten Druckschalter (7) verbunden ist, wobei der Differenzdrucksensor (8) ein Luftsensorsignal (10) und der Druckschalter (7) ein Luftprüfungssignal (9) erzeugt, die einer elektronischen Regeleinrichtung (11) zugeführt werden, die daraus ein Luftstellsignal (3) für das Gebläse (2) und ein Brennstoffstellsignal (12) zur Betätigung des Brennstoffstellgliedes (14) erzeugen, dadurch gekennzeichnet, dass zur Funktionsüberprüfung die Regeleinrichtung (11) mit einem Regelsollwert beaufschlagt wird, der wenigstens dem bei Normalbetrieb sich einstellenden Maximalvolumenstrom entspricht oder grösser als dieser ist, und dass der in einer Ruhestellung sich befindliche Druckschalter (7) daraufhin überwacht wird, ob dieser geschaltet hat und dass die Freigabe des Brennstoffstellgliedes (14) erst nach dem Schalten des Druckschalters (7) erfolgt, wodurch der Brenner in Betrieb genommen werden kann.Device for carrying out the method according to claims 1 to 3 with an air actuator (4) by means of which the speed of a blower (2) is controlled, the blower (2) being connected to an air duct (5) and a fuel actuator (14) by means of which in normal operation controls the fuel supply to a combustion chamber (1) and that the air duct (5) is connected to a differential pressure sensor (8) and a pressure switch (7) connected in parallel, the differential pressure sensor (8) being an air sensor signal (10) and the pressure switch (7) generates an air test signal (9) which is fed to an electronic control device (11), which generates an air control signal (3) for the blower (2) and a fuel control signal (12) for actuating the fuel control element (14), characterized in that for the function check the control device (11) is acted upon by a control setpoint which is set at least in normal operation llenden maximum volume flow corresponds or is greater than this, and that the pressure switch (7) which is in an idle position is monitored to determine whether it has switched and that the fuel actuator (14) is only released after the pressure switch (7) is switched, which means that the burner can be started. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass vor Inbetriebnahme des Gebläses (2) durch eine Sicherheitseinrichtung (21) überprüft wird, ob der Druckschalter (7) sich in seiner Ruhestellung befindet und nach Inbetriebnahme des Gebläses die Sicherheitseinrichtung (21) eine Rückmeldung abgibt,ob der Druckschalter (7) geschaltet hat.Apparatus according to claim 4, characterized in that before the blower (2) is started up, a safety device (21) checks whether the pressure switch (7) is in its rest position and after the blower has been started up, the safety device (21) emits a response, whether the pressure switch (7) has switched. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Sicherheitseinrichtung (21) bei fehlerfreiem Ablauf der Prüfvorgänge ein Freigabesignal (16) erzeugt, wodurch ein Sicherheitsventil (17) den Brennstoff für den Brenner freigibt.Apparatus according to claim 5, characterized in that the safety device (21) generates a release signal (16) when the test processes run without errors, as a result of which a safety valve (17) releases the fuel for the burner.
EP03005702.0A 2002-04-02 2003-03-13 Process to check the operation of the regulation system of heating burner Expired - Lifetime EP1351019B1 (en)

Applications Claiming Priority (2)

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CH5402002 2002-04-02
CH5402002 2002-04-02

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WO2006044408A1 (en) * 2004-10-14 2006-04-27 Shell Internationale Research Maatschappij B.V. A method and apparatus for monitoring and controlling the stability of a burner of a fired heater
EP1712841A1 (en) * 2005-04-14 2006-10-18 Immergas S.p.A. Electronic device and method for managing the exhaust of burnt gases, in particular in a boiler
DE102010054807A1 (en) * 2010-12-16 2012-06-21 Honeywell Technologies Sarl Gas burner device has combustion chamber, gas burners for combusting gas in combustion chamber and multiple blowers for supplying combustion air in combustion chamber required for combusting gas

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EP0909922A1 (en) 1997-10-17 1999-04-21 IABER S.p.A. Combined gas-air control system for controlling combustion in gas fired boilers

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DE4429157A1 (en) 1994-08-17 1996-02-22 Kromschroeder Ag G Method for monitoring the function of a control and regulating system
EP0909922A1 (en) 1997-10-17 1999-04-21 IABER S.p.A. Combined gas-air control system for controlling combustion in gas fired boilers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006044408A1 (en) * 2004-10-14 2006-04-27 Shell Internationale Research Maatschappij B.V. A method and apparatus for monitoring and controlling the stability of a burner of a fired heater
US7950919B2 (en) 2004-10-14 2011-05-31 Shell Oil Company Method and apparatus for monitoring and controlling the stability of a burner of a fired heater
EP1712841A1 (en) * 2005-04-14 2006-10-18 Immergas S.p.A. Electronic device and method for managing the exhaust of burnt gases, in particular in a boiler
DE102010054807A1 (en) * 2010-12-16 2012-06-21 Honeywell Technologies Sarl Gas burner device has combustion chamber, gas burners for combusting gas in combustion chamber and multiple blowers for supplying combustion air in combustion chamber required for combusting gas
DE102010054807B4 (en) * 2010-12-16 2015-07-02 Honeywell Technologies Sarl Method for operating a gas burner device

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