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EP0388065A3 - Flame detection apparatus and method - Google Patents

Flame detection apparatus and method Download PDF

Info

Publication number
EP0388065A3
EP0388065A3 EP19900302390 EP90302390A EP0388065A3 EP 0388065 A3 EP0388065 A3 EP 0388065A3 EP 19900302390 EP19900302390 EP 19900302390 EP 90302390 A EP90302390 A EP 90302390A EP 0388065 A3 EP0388065 A3 EP 0388065A3
Authority
EP
European Patent Office
Prior art keywords
flame
control signal
charge
probe
detection apparatus
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Withdrawn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
EP19900302390
Other languages
German (de)
French (fr)
Other versions
EP0388065A2 (en
Inventor
Clive R. Steer
John W. Defries
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.)
Black Automatic Controls Ltd
Original Assignee
Black Automatic Controls Ltd
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 Black Automatic Controls Ltd filed Critical Black Automatic Controls Ltd
Publication of EP0388065A2 publication Critical patent/EP0388065A2/en
Publication of EP0388065A3 publication Critical patent/EP0388065A3/en
Withdrawn legal-status Critical Current

Links

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
    • F23N5/12—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/20—Opto-coupler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/12—Flame sensors with flame rectification current detecting means

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Control Of Combustion (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

Apparatus and methods are described for the detection of the presence of a flame (10), the apparatus including circuit means for applying an alternating voltage to a flame probe (2) such that the alternating voltage is partially rectified in the presence of a flame (10) at the probe (2) resulting in the development of a DC voltage component. The DC voltage component causes the accumulation of a corresponding electrical charge in a storage element (18), the apparatus includes means (120,36) for periodically releasing the charge. An optical coupling means (40) is responsive to the released charge to initiate a control signal in a control signal generator (130), the control signal indicating detection of the flame (10).
EP19900302390 1989-03-17 1990-03-06 Flame detection apparatus and method Withdrawn EP0388065A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898906235A GB8906235D0 (en) 1989-03-17 1989-03-17 Flame detection apparatus and method
GB8906235 1989-03-17

Publications (2)

Publication Number Publication Date
EP0388065A2 EP0388065A2 (en) 1990-09-19
EP0388065A3 true EP0388065A3 (en) 1991-04-24

Family

ID=10653569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900302390 Withdrawn EP0388065A3 (en) 1989-03-17 1990-03-06 Flame detection apparatus and method

Country Status (2)

Country Link
EP (1) EP0388065A3 (en)
GB (2) GB8906235D0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122636C2 (en) * 1991-07-09 1999-08-12 Bosch Gmbh Robert Device and method for monitoring a flame
US5439374A (en) * 1993-07-16 1995-08-08 Johnson Service Company Multi-level flame curent sensing circuit
EP0908679A1 (en) * 1997-10-10 1999-04-14 Electrowatt Technology Innovation AG Circuit for flame monitoring
EP1211460B1 (en) * 2000-12-01 2006-08-30 Vaillant GmbH Flame monitoring circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348104A (en) * 1964-12-14 1967-10-17 American Gas Ass Bias-controlled a. c.-operable voltage threshold circuit, and systems employing same
DE1526255A1 (en) * 1965-12-22 1970-04-02 May & Christe Gmbh Device for monitoring non-luminous flames
GB1419653A (en) * 1972-01-26 1975-12-31 Kidde & Co Walter Fuel flow control apparatus for a burner
US4370125A (en) * 1980-10-01 1983-01-25 Emerson Electric Co. Control system for blue-flame oil burner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55102826A (en) * 1979-02-02 1980-08-06 Toshiba Corp Combustion device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348104A (en) * 1964-12-14 1967-10-17 American Gas Ass Bias-controlled a. c.-operable voltage threshold circuit, and systems employing same
DE1526255A1 (en) * 1965-12-22 1970-04-02 May & Christe Gmbh Device for monitoring non-luminous flames
GB1419653A (en) * 1972-01-26 1975-12-31 Kidde & Co Walter Fuel flow control apparatus for a burner
US4370125A (en) * 1980-10-01 1983-01-25 Emerson Electric Co. Control system for blue-flame oil burner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 4, no. 150 (M-37)(632) 22 October 1980, & JP-A-55 102826 (TOKYO SHIBAURA) 06 August 1980, *

Also Published As

Publication number Publication date
GB2230632A (en) 1990-10-24
EP0388065A2 (en) 1990-09-19
GB9004948D0 (en) 1990-05-02
GB8906235D0 (en) 1989-05-04

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