GB1289489A - - Google Patents

Info

Publication number
GB1289489A
GB1289489A GB1289489DA GB1289489A GB 1289489 A GB1289489 A GB 1289489A GB 1289489D A GB1289489D A GB 1289489DA GB 1289489 A GB1289489 A GB 1289489A
Authority
GB
United Kingdom
Prior art keywords
capacitor
flame
burner
thyristor
triggered
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.)
Expired
Application number
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 filed Critical
Publication of GB1289489A publication Critical patent/GB1289489A/en
Expired 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
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/004—Using semiconductor elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/10—Arrangement or mounting of ignition devices
    • F24C3/103—Arrangement or mounting of ignition devices of electric ignition devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • F02P2017/125—Measuring ionisation of combustion gas, e.g. by using ignition circuits
    • F02P2017/126—Measuring ionisation of combustion gas, e.g. by using ignition circuits for burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/32—Igniting for a predetermined number of cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/36—Spark ignition, e.g. by means of a high voltage
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/08—Household apparatus

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

1289489 Burner controls ATELIERS DE LA MOTOBECANE 23 Dec 1969 [27 Dec 1968] 62650/69 Heading F4T In a burner ignition and control system, sparks are generated between an electrode and the burner body by a capacitor C 0 discharging at intervals through the primary N 1 of a transformer E and a thyristor TH 0 which is triggered at the required frequency by a trigger circuit CD, the sparks initially igniting the burner, then being used for flame detection by inducing oscillations in a detector circuit, the oscillations having different decay times, due to flame ionization, according to whether or not a flame is present. The detector circuit comprises a coil N 3 having a small number of turns and a capacitor C 2 , and when no flame is present the oscillatory decay of this circuit blocks a transistor T 1 for a time t which will be longer than that required for a capacitor C 3 to charge up and trigger a unijunction transistor UJT 2 to produce a pulse which is fed via a diode D 4 to capacitor C 4 of a safety circuit S 1 . After a predetermined number of pulses, the charge on C 4 fires transistor T 2 which in turn triggers thyristor TH 2 to by-pass a relay RL which then opens a switch M<SP>1</SP> and actuates the electromagnetic valve EV to cut-off the fuel supply. If a flame is present, t will be less than t 1 and the capacitor C 3 will discharge through resistor R 9 . A second safety circuit S 2 detects abnormal operation of the system and is normally rendered inoperative by the pulse from UJT 2 produced by the first (ignition) spark which detects absence of flame. The pulse triggers thyristor TH 3 to prevent charging of capacitor C 5 . If the electrode and burner are shortcircuited, no spark will be produced and TH 3 will not be triggered so capacitor C 5 will charge up until UJT 3 is triggered, thus triggering thyristor TH 2 which actuates the relay RL opening switch M<SP>1</SP> and cutting the Fuel supply via valve EV.
GB1289489D 1968-12-27 1969-12-23 Expired GB1289489A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR180894 1968-12-27

Publications (1)

Publication Number Publication Date
GB1289489A true GB1289489A (en) 1972-09-20

Family

ID=8659153

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1289489D Expired GB1289489A (en) 1968-12-27 1969-12-23

Country Status (4)

Country Link
DE (1) DE1962708C3 (en)
ES (1) ES375588A1 (en)
FR (1) FR1598786A (en)
GB (1) GB1289489A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11619385B2 (en) 2020-02-21 2023-04-04 Hearth Products Controls Co. Ignition system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249381B (en) * 1990-10-29 1995-01-11 British Gas Plc Gas burners
US5253475A (en) * 1992-06-22 1993-10-19 General Motors Corporation Combustion detection
ES2116854B1 (en) * 1994-10-03 1999-03-01 Chavarino Emilio Guerra END OF COOKING DEVICE IN GAS BURNERS TO PROGRAM THE DURATION OF THE HEATING.
FR2745066B1 (en) * 1996-02-15 1998-04-24 Eaton Sa Monaco PROTECTIVE DEVICE FOR GAS COOKING OR HEATING APPARATUS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11619385B2 (en) 2020-02-21 2023-04-04 Hearth Products Controls Co. Ignition system

Also Published As

Publication number Publication date
DE1962708B2 (en) 1973-08-09
FR1598786A (en) 1970-07-06
DE1962708C3 (en) 1974-03-07
ES375588A1 (en) 1972-05-16
DE1962708A1 (en) 1970-07-09

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee