EP1571395A1 - Vorrichtung zur Flammenüberwachung eines Brenners - Google Patents

Vorrichtung zur Flammenüberwachung eines Brenners Download PDF

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Publication number
EP1571395A1
EP1571395A1 EP04425138A EP04425138A EP1571395A1 EP 1571395 A1 EP1571395 A1 EP 1571395A1 EP 04425138 A EP04425138 A EP 04425138A EP 04425138 A EP04425138 A EP 04425138A EP 1571395 A1 EP1571395 A1 EP 1571395A1
Authority
EP
European Patent Office
Prior art keywords
unit
control
watch
solenoid valve
switch block
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Withdrawn
Application number
EP04425138A
Other languages
English (en)
French (fr)
Inventor
Attiliano Gambaretto
Andrea Marini Celadon
Giuseppe Toniato
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.)
Riello SpA
Original Assignee
Riello SpA
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.)
Filing date
Publication date
Application filed by Riello SpA filed Critical Riello SpA
Priority to EP04425138A priority Critical patent/EP1571395A1/de
Priority to CN 200510053107 priority patent/CN1664443A/zh
Publication of EP1571395A1 publication Critical patent/EP1571395A1/de
Withdrawn legal-status Critical Current

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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
    • F23N3/00—Regulating air supply or draught
    • F23N3/08—Regulating air supply or draught by power-assisted systems
    • F23N3/082—Regulating air supply or draught by power-assisted systems using electronic means

Definitions

  • the present invention relates to a single-control-channel unit for controlling the flame of a burner, in particular a gas or vapourized liquid fuel burner.
  • a gas or vapourized liquid fuel burner is supplied with a fuel and combustion air mixture.
  • the composition and combustion of the mixture are controlled by a flame control unit, which regulates combustion air flow to the burner by means of a fan, and regulates fuel flow by means of solenoid valves.
  • the flame control unit is normally equipped with at least one electronic control device (microcontroller) for processing physical flame combustion parameters and regulating the fuel and combustion air mixture according to the desired calories.
  • the electronic control device processes certain parameters of the burner system to supply control signals for controlling burner system actuating devices, such as the fuel feed solenoid valves and the electric motor applied to the fan.
  • the flame control unit must be made to specific operating safety standards.
  • control unit must cut off fuel supply immediately, upon the electronic control device determining processing errors or malfunctioning of the actuating devices.
  • multiple-control-channel architecture calls for additional comparing devices to compare the results of the various channels, and to determine, in the case of two channels, or even solve, in the case of three channels, any fault on one of the channels caused by failure of the flame control unit component parts or electronic devices.
  • a fuel burner single-control-channel flame control unit as claimed in Claim 1 and, preferably in any one of the following Claims depending directly or indirectly on Claim 1.
  • Number 1 in Figure 1 indicates as a whole a single-control-channel flame control unit for a two-stage fuel burner (not shown).
  • Control unit 1 comprises a number of inputs 2, 3, 4, 5 for receiving signals from sensors of the burner; and a number of control outputs 6, 7, 8, which comprise a motor control output 6 connected to the electric motor applied to the combustion air fan (not shown) of the burner, and a first solenoid valve control output 7 and a second solenoid valve control output 8, each connected to a respective fuel supply solenoid valve (not shown) of the burner.
  • Control unit 1 comprises a control device (microcontroller) 9, which controls control outputs 6, 7, 8 on the basis of the signals from inputs 2, 3, 4, 5, and on the basis of a number of signals 10, 11, 12, 13, 14, 15 generated within control unit 1, to conform with specific operating safety requirements.
  • a control device microcontroller 9 which controls control outputs 6, 7, 8 on the basis of the signals from inputs 2, 3, 4, 5, and on the basis of a number of signals 10, 11, 12, 13, 14, 15 generated within control unit 1, to conform with specific operating safety requirements.
  • Control device 9 controls control outputs 6, 7, 8 by means of respective switch blocks 16, 17, 18. More specifically, a first switch block 16 is associated with motor control output 6, a second switch block 17 is associated with first solenoid valve control output 7, and a third switch block 18 is associated with second solenoid valve control output 8.
  • Control device 9 performs safety actions on control outputs 6, 7, 8 whenever malfunctioning of control unit 1 is determined on the basis of an undervoltage signal 12, generated by first switch block 16 when the mains voltage 19 of unit 1 falls below a predetermined threshold, a motor output fault signal 13, a first solenoid valve fault signal 14, and a second solenoid valve fault signal 15.
  • Control unit 1 also comprises a hardware watch-dog device 20, which provides for further safety control, independent of that performed by control device 9, by acting directly on first and second solenoid valve control outputs 7, 8. More specifically, watch-dog device 20 is connected substantially two-way to second switch block 17, which is located upstream from and in series with third switch block 18. In other words, disabling of first solenoid valve control output 7 also disables second solenoid valve control output 8.
  • Watch-dog device 20 is connected to control device 9 so that the two devices 9, 20 control each other.
  • control device 9 sends a periodic signal 10 of given characteristics to second switch block 17.
  • the periodic signal 10 loses its given characteristics, thus disabling watch-dog device 20 and so opening second switch block 17.
  • a malfunction of second switch block 17 or of watch-dog device 20 disables watch-dog device 20 and so opens second switch block 17.
  • Watch-dog device 20 communicates the malfunction to control device 9 by a watch-dog feedback signal 11 to disable control device 9.
  • Inputs 2, 3, 4, 5 comprise a thermostat input 2, a gas pressure switch input 3, an air pressure switch input 4, and a flame sensor input 5.
  • Control device 9 controls a switch 21 for enabling or disabling thermostat input 2, gas pressure switch input 3, and air pressure switch input 4; and disabling of the above inputs corresponds to enabling of a reset block 22, which resets control device 9 when a respective reset button 23 is pressed.
  • Control unit 1 also comprises a non-volatile (EEPROM) memory 24 for memorizing diagnostic data for supply to an external computer connected to control unit 1 over a serial data output 25 (RS232).
  • EEPROM non-volatile
  • a lighter 26 is also integrated in the unit to generate the flame ignition spark under the control of control device 9.
  • Control device 9 is programmed with class C firmware, i.e. complex firmware for devices operating to specific safety requirements, to control control outputs 6, 7, 8 as a function of the signals from inputs 2, 3, 4, 5, and as a function of a number of signals 10, 11, 12, 13, 14, 15 within the unit, according to a given control method.
  • class C firmware i.e. complex firmware for devices operating to specific safety requirements
  • control unit 1 Operation of control unit 1 is defined by a state machine, the state transitions of which are controlled by the flame control method according to the invention.
  • the flame control method comprises the following main steps performed cyclically, and as shown in the main flow chart in Figure 2:
  • execution (115) of the application module is shown in the Figure 3 flow chart, and comprises:
  • management (120) of reset block 22 is shown in the Figure 4 flow chart, and comprises:
  • management (124) of motor control output 6 is shown in the Figure 6 flow chart, and comprises:
  • the main advantage of the present invention is that of providing a single-control-channel flame control unit 1 comprising only one control device 9, and capable of meeting the same operating safety requirements as known multiple-channel control units, while at the same time simplifying the circuitry and so improving the overall reliability of unit 1.
  • control unit 1 altering the hardware architecture of control unit 1 by providing a hardware watch-dog device 20 independent of control device 9, and by enhancing the software architecture (class C firmware) by which control device 9 governing control unit 1 is programmed.

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)
EP04425138A 2004-03-02 2004-03-02 Vorrichtung zur Flammenüberwachung eines Brenners Withdrawn EP1571395A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04425138A EP1571395A1 (de) 2004-03-02 2004-03-02 Vorrichtung zur Flammenüberwachung eines Brenners
CN 200510053107 CN1664443A (zh) 2004-03-02 2005-03-02 燃烧器火焰控制单元

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425138A EP1571395A1 (de) 2004-03-02 2004-03-02 Vorrichtung zur Flammenüberwachung eines Brenners

Publications (1)

Publication Number Publication Date
EP1571395A1 true EP1571395A1 (de) 2005-09-07

Family

ID=34746224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425138A Withdrawn EP1571395A1 (de) 2004-03-02 2004-03-02 Vorrichtung zur Flammenüberwachung eines Brenners

Country Status (2)

Country Link
EP (1) EP1571395A1 (de)
CN (1) CN1664443A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006091616A1 (en) * 2005-02-24 2006-08-31 Alstom Technology Ltd. Self diagonostic flame ignitor
GB2414535B (en) * 2004-05-24 2007-11-14 Sunvic Controls Ltd Programmer

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011208921A (ja) * 2010-03-30 2011-10-20 Yamatake Corp 燃焼制御装置
CN105351966A (zh) * 2015-12-04 2016-02-24 深圳智慧能源技术有限公司 引射式燃烧装置的控制逻辑参数阀值快速调节系统
JP6682314B2 (ja) * 2016-03-28 2020-04-15 アズビル株式会社 燃焼制御装置
JP6953829B2 (ja) * 2017-06-23 2021-10-27 株式会社ノーリツ 燃焼装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230390A1 (de) * 1992-09-11 1994-03-17 Cramer Gmbh & Co Kg Gasfeuerungsautomat für eine wärmeenergieerzeugende Einrichtung
EP0803680A2 (de) * 1996-04-23 1997-10-29 Robert Bosch Gmbh Schaltungsanordnung zum Überwachen eins brennstoffbeheizten Gerätes
DE19747819A1 (de) * 1996-10-23 1998-07-16 Vaillant Joh Gmbh & Co Steuer- und Überwachungseinrichtung für ein brennstoffbeheiztes Heizgerät
US20020120353A1 (en) * 2000-12-15 2002-08-29 Pouchak Michael A. Human interface panel for boiler control system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230390A1 (de) * 1992-09-11 1994-03-17 Cramer Gmbh & Co Kg Gasfeuerungsautomat für eine wärmeenergieerzeugende Einrichtung
EP0803680A2 (de) * 1996-04-23 1997-10-29 Robert Bosch Gmbh Schaltungsanordnung zum Überwachen eins brennstoffbeheizten Gerätes
DE19747819A1 (de) * 1996-10-23 1998-07-16 Vaillant Joh Gmbh & Co Steuer- und Überwachungseinrichtung für ein brennstoffbeheiztes Heizgerät
US20020120353A1 (en) * 2000-12-15 2002-08-29 Pouchak Michael A. Human interface panel for boiler control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2414535B (en) * 2004-05-24 2007-11-14 Sunvic Controls Ltd Programmer
WO2006091616A1 (en) * 2005-02-24 2006-08-31 Alstom Technology Ltd. Self diagonostic flame ignitor
US7492269B2 (en) 2005-02-24 2009-02-17 Alstom Technology Ltd Self diagonostic flame ignitor
CN101128700B (zh) * 2005-02-24 2010-05-19 阿尔斯托姆科技有限公司 自诊断点火装置

Also Published As

Publication number Publication date
CN1664443A (zh) 2005-09-07

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