EP2295863A2 - Système de combustion, automate de chauffage au gaz ainsi que dispositif et procédé d'arrêt d'une amenée de combustible correspondant - Google Patents

Système de combustion, automate de chauffage au gaz ainsi que dispositif et procédé d'arrêt d'une amenée de combustible correspondant Download PDF

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Publication number
EP2295863A2
EP2295863A2 EP10172195A EP10172195A EP2295863A2 EP 2295863 A2 EP2295863 A2 EP 2295863A2 EP 10172195 A EP10172195 A EP 10172195A EP 10172195 A EP10172195 A EP 10172195A EP 2295863 A2 EP2295863 A2 EP 2295863A2
Authority
EP
European Patent Office
Prior art keywords
independent
abschaltweg
paths
fuel supply
switch
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
EP10172195A
Other languages
German (de)
English (en)
Other versions
EP2295863A3 (fr
EP2295863B1 (fr
Inventor
Klaus Krieger
Hartmut Birr
Michael Wenz
Arne Deseyve
Juergen Grossmann
Hanspeter Leutz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
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Publication date
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2295863A2 publication Critical patent/EP2295863A2/fr
Publication of EP2295863A3 publication Critical patent/EP2295863A3/fr
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Publication of EP2295863B1 publication Critical patent/EP2295863B1/fr
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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
    • F23N2231/00—Fail safe
    • F23N2231/04—Fail safe for electrical power failures
    • 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
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements

Definitions

  • the invention relates to a method for interrupting a fuel supply to a combustion system by means of valves controlled by a gas burner control device, in the presence of a safety concern and / or a fault according to the preamble of patent claim 1.
  • the invention relates to a device for interrupting a fuel supply to a combustion system by means of controlled by a gas burner control valves, in the presence of a safety concern and / or a fault, according to the preamble of claim 5.
  • the invention also relates to a gas burner control unit for safe operation of a combustion system, according to the preamble of claim 10.
  • the invention relates to a combustion system, in particular a combustion system with a gas burner, according to the preamble of claim 11.
  • overvoltage protection is provided on a power supply unit supplying the automatic gas burner.
  • the overvoltage protection is usually achieved with Zener diodes or suppressor diodes connected in parallel with the logic supply.
  • this overvoltage protection is very inaccurate, which can be damaged very easily to be supplied logic components such as microcontroller, so-called watchdogs, etc., thereby reducing the safety of the automatic burner control.
  • GFA automatic gas burner control
  • Third or multiple static errors are: In the event of such an error, it happens that e.g. several ports of a microcontroller keep their state permanently or that a microcontroller or the like by overvoltage, EMC pulse. permanently persisted in a current state, without leaving it again. This error consideration should be taken into account when revising the EN 298 standard.
  • the invention has for its object to provide a combustion system, a gas burner control, a device and a method for interrupting a fuel supply, in which the logic and / or switching parts are securely protected and unintentional opening of a fuel supply (gas valves) is reliably prevented.
  • the inventive method for interrupting a fuel supply to a combustion system by means of controlled by a gas burner control valves, in the presence of a safety concern and / or a fault, wherein the interruption is performed via at least two independent Abschaltwege is characterized in that at least one independent monitoring at least one of independent Abschaltwege via a third, coupled to at least one of the independent Abschaltwege shutdown is performed to ensure a fault in at least one of the shutdown a safe interruption of the fuel supply.
  • the at least two switch-off paths are respectively monitored via at least one independent monitoring device.
  • the third shutdown path is triggered with at least the first and / or the second shutdown path.
  • Yet another embodiment of the present invention contemplates that the third shutdown path discontinues fueling when a dynamic signal generated by the at least one coupled independent shutdown path fails.
  • the device according to the invention for interrupting a fuel supply to a combustion system by means of valves controlled by a gas burner control, in the presence of a safety concern and / or a fault, wherein at least two independent shutdown paths are provided for interrupting the fuel supply, characterized in that means for carrying out a method according to the invention are provided, wherein the means comprise at least one coupled to at least one of the independent Abschaltwege, a dependent, in particular third Abschaltweg controlling safety device to ensure a reliable interruption of the fuel supply in the presence of a fault in the at least one independent Abschaltweg.
  • the dependent Abschaltweg coupled via a dynamic signal with at least one of the independent Abschaltwege, in particular triggered.
  • the third switch-off path comprises a switch for interrupting the voltage and / or current supply of the valves, the switch being switchable as a function of a trigger signal.
  • the dependent shutdown path comprises at least one system base chip, in particular a watchdog IC or guard dog IC, for monitoring the coupled independent shutdown path (IC: integrated circuit).
  • the safety device has at least two independent shutdown paths each a power failure protection, in particular an overvoltage protection.
  • the automatic gas burner control unit according to the invention for safe operation of a combustion system, with switching means, is characterized in that the switching means comprise at least one device according to the invention.
  • the combustion system according to the invention is characterized in that at least one gas burner control device according to the invention is provided.
  • This safety device or controlled by her third Abschaltweg interrupt the voltage or power supply of the fuel valves by means of a separate switch as soon as a normal operating conditions of at least one of the two shutdown regularly emitted trigger signal now in case of failure of these no longer sent and therefore no longer received by the third shutdown. This reliably shuts off the fuel supply and reliably precludes an unsafe operating state.
  • Fig. 1 schematically shows in a block diagram a circuit arrangement of a device 1 for a gas fire engine.
  • a gas supply takes place in accordance with the position of two safety solenoid valves 14, which are fed by a power supply 12.
  • the safety solenoid valves 14 close and thus interrupt a gas supply.
  • the device 1 comprises a safety device 4 having a first shut-off path 2, a second shut-off path 3 and a third shut-off path 5 according to the invention.
  • the shut-off paths 2, 3, 5 each comprise a logic circuit or a microcontroller 17, 10, 6, wherein each microcontroller with at least one switch 16, 11, 19 for interrupting a power supply of the safety solenoid valves 14 cooperates.
  • the microcontroller 6, 10 and 17 are each supplied in the illustrated embodiment by its own power source. For redundant design of the safety device 4, this at least for at least two independent shutdown paths 2, 3 depending on a power failure protection 7, in particular an overvoltage protection, on, here only one is shown schematically.
  • the first shut-off path 2 and the second shut-off path 3 are connected via corresponding lines 8 to an ionization detection circuit 9.
  • a heat demand as shown by the arrow P, also sent to the microcontroller 17, which switches the coupled components accordingly. ever After heat demand, the microcontroller 17 switches the safety solenoid valves 14, whereby the fuel supply is regulated or adjusted according to a safety solenoid valve position 14.
  • the first shut-off path 2 and the second shut-off path 3 are connected via corresponding lines 8 to an ionization detection circuit 9.
  • the second shutdown 3 includes according to the embodiment of Fig. 1 an ASIC, microcontroller or watchdog logic device 10 (ASIC: application specific integrated circuit). This is in turn coupled to a so-called high-side switch 11, which switches or interrupts a power supply 12 for safety solenoid valves 14. Downstream of the highside switch 11 is a gas fitting 13.
  • the gas fitting 13 comprises the two safety solenoid valves 14, which regulate a corresponding switching of the fuel supply.
  • the safety solenoid valves 14 may be connected in parallel, as shown.
  • the safety solenoid valves 14 are coupled via a safety temperature limiter 15 to the highside switch 11. Downstream of the safety solenoid valves 14 is a respective switch 16 of the first Abschaltweges 2.
  • the switches 16 are controlled by a microcontroller or short microcontroller 17, which is included in the first Abschaltweg 2.
  • the microcontroller 17 controls via a corresponding circuit 18, here a logical AND circuit, the power supply to the safety solenoid valves 14 so that a fuel supply according to the first Abschaltweg 2 by switching the switch 11 and thus the power supply to the safety solenoid valves 14 is switchable.
  • a heat demand as shown by the arrow P, also sent to the microcontroller 17, which switches the coupled components accordingly.
  • the microcontroller 17 switches the safety solenoid valves 14, whereby the fuel supply is regulated or adjusted according to a safety solenoid valve position 14.
  • the microcontroller 17 thus processes the heat requirements and operates the burner.
  • the microcontroller 17 is the watchdog, ASIC or microcontroller 10 of the second shutdown 3, which in the embodiment according to Fig. 1 the flame of a burner monitored by a flame signal (ionization).
  • the safety device 4 With the first shutdown 2, the safety device 4, more precisely, the third shutdown 5 of the safety device 4 is coupled.
  • the third shutdown path 5 includes the system base chip 6, which is designed here as a watchdog.
  • the watchdog 6 is triggered by the microcontroller 17 regularly, for example via a dynamic signal. If the watchdog 6 is not triggered, it opens a low-side switch 19, whereby the magnetic safety valves 14 are closed. Thus, the system is brought into a safe state even in the case of third static errors.
  • the watchdog 6 of the third shutdown can be configured as a time-out watchdog, a time-window watchdog or a smart watchdog with question-answer protocol.
  • the low-side switch 19 preferably comprises an N-channel power MOSFET (MOSFET: metal-oxide-semiconductor field-effect transistor).
  • the safety device 4 also includes a power failure protection 7, which is integrated here as overvoltage protection in the logic module 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Feeding And Controlling Fuel (AREA)
EP10172195.9A 2009-08-06 2010-08-06 Système de combustion, automate de chauffage au gaz ainsi que dispositif et procédé d'arrêt d'une amenée de combustible correspondant Active EP2295863B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009036423.4A DE102009036423C5 (de) 2009-08-06 2009-08-06 Verfahren und Vorrichtung zur Unterbrechung einer Brennstoffzufuhr sowie deren Verwendung

Publications (3)

Publication Number Publication Date
EP2295863A2 true EP2295863A2 (fr) 2011-03-16
EP2295863A3 EP2295863A3 (fr) 2014-06-11
EP2295863B1 EP2295863B1 (fr) 2019-05-01

Family

ID=42830289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10172195.9A Active EP2295863B1 (fr) 2009-08-06 2010-08-06 Système de combustion, automate de chauffage au gaz ainsi que dispositif et procédé d'arrêt d'une amenée de combustible correspondant

Country Status (2)

Country Link
EP (1) EP2295863B1 (fr)
DE (1) DE102009036423C5 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3848633A1 (fr) 2020-01-10 2021-07-14 Siemens Aktiengesellschaft Circuit avec protection contre les erreurs internes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020104766A1 (de) 2020-02-24 2021-08-26 Vaillant Gmbh Verfahren und Vorrichtung zur Fehlerdiagnose an einem Feuerungsautomaten
DE102020128045A1 (de) 2020-10-26 2022-04-28 Vaillant Gmbh Verfahren und Vorrichtung zur Verhinderung eines Flammenrückschlags bei einer Brenneranordnung für ein vorgemischtes Brennstoff-Luft-Gemisch

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
DE2433447A1 (de) 1974-07-11 1976-01-22 Ind Copreci S C I Zuendeinrichtung fuer gasbrenngeraete
DE3108409C2 (de) 1981-03-06 1990-04-19 3119 Bienenbüttel Friedrich Bartels Ingenieurbüro Flammenwächter
US4695246A (en) 1984-08-30 1987-09-22 Lennox Industries, Inc. Ignition control system for a gas appliance
US4854852A (en) 1987-09-21 1989-08-08 Honeywell Inc. System for redundantly processing a flame amplifier output signal
DE3923773A1 (de) 1988-07-20 1990-03-01 Vaillant Joh Gmbh & Co Verfahren zum steuern und ueberwachen eines brennstoffbeheizten geraetes unter verwendung zumindest eines mikrocomputersystems und vorrichtung zur durchfuehrung des verfahrens
DE4111947A1 (de) 1991-04-12 1992-10-15 Bosch Gmbh Robert Schaltungsanordnung und verfahren zum ueberwachen eines brennstoffbeheizten geraetes
DE4342903A1 (de) 1993-12-16 1995-06-22 Bosch Gmbh Robert Vorrichtung zum Überwachen wenigstens einer sicherheitsrelevanten Funktion eines Gerätes
DE19612423A1 (de) 1996-03-28 1997-10-02 Siemens Ag Steuer- und Sicherheitssystem für Krananlagen
DE19616065A1 (de) 1996-04-23 1997-11-06 Bosch Gmbh Robert Schaltungsanordnung zum Überwachen eines brennstoffbeheizten Gerätes
DE19860399A1 (de) 1998-12-28 2000-07-06 Bosch Gmbh Robert Steuereinrichtung für einen Brenner
JP3419752B2 (ja) 2000-10-19 2003-06-23 アール・ビー・コントロールズ株式会社 燃焼制御装置
JP2004093047A (ja) 2002-09-02 2004-03-25 Rb Controls Co 燃焼制御装置
DE10321764B4 (de) 2003-05-15 2005-04-28 Bbt Thermotechnik Gmbh Verfahren zur Ansteuerung eines Sicherheitsrelais in einem Feuerungsautomaten
US20050244765A1 (en) 2004-03-05 2005-11-03 Honda Motor Co., Ltd. Method of controlling operation of fuel gas production apparatus
DE102004017950B3 (de) 2004-04-14 2005-06-23 Moeller Gmbh Mechanisch-elektronischer Positionsgeber

Non-Patent Citations (1)

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Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3848633A1 (fr) 2020-01-10 2021-07-14 Siemens Aktiengesellschaft Circuit avec protection contre les erreurs internes
US11789799B2 (en) 2020-01-10 2023-10-17 Siemens Aktiengesellschaft Protection against internal faults in burners

Also Published As

Publication number Publication date
DE102009036423C5 (de) 2023-03-02
EP2295863A3 (fr) 2014-06-11
EP2295863B1 (fr) 2019-05-01
DE102009036423A1 (de) 2011-02-17
DE102009036423B4 (de) 2013-03-28

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