ES361790A1 - Flame detector - Google Patents

Flame detector

Info

Publication number
ES361790A1
ES361790A1 ES361790A ES361790A ES361790A1 ES 361790 A1 ES361790 A1 ES 361790A1 ES 361790 A ES361790 A ES 361790A ES 361790 A ES361790 A ES 361790A ES 361790 A1 ES361790 A1 ES 361790A1
Authority
ES
Spain
Prior art keywords
signal
flame
electrode
electrodes
modulated
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
ES361790A
Other languages
Spanish (es)
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.)
Combustion Engineering Inc
Original Assignee
Combustion Engineering Inc
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 Combustion Engineering Inc filed Critical Combustion Engineering Inc
Publication of ES361790A1 publication Critical patent/ES361790A1/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
    • F23N5/126—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 electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Control Of Combustion (AREA)

Abstract

The presence or absence of a flame between two electrodes 14, 18 is detected by applying a low voltage, alternating carrier signal C to electrode 14, and detecting at the electrode 18, which picks up the signal transmitted by electrode 14, whether the signal is modulated as a result of gas ionization in the flame. As shown, an S.C.R. 56 is triggered only when the carrier signal is modulated, the signal then activating a switch 62, e.g. a reed relay in conjunction with a relay hold capacitor 68, which sends the signal to a readout 64. Upon flame cessation, S.C.R. 56 is non-conducting, switch 62 is deactivated, and an alarm 38 is activated. The alarm may be used automatically to turn off the flame gases. The electrodes may be in the form of aviation spark plugs, Fig. 7 (not shown), such that air circulation in the plugs maintains the electrodes clear of combustion products.
ES361790A 1967-12-26 1968-12-23 Flame detector Expired ES361790A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69330867A 1967-12-26 1967-12-26

Publications (1)

Publication Number Publication Date
ES361790A1 true ES361790A1 (en) 1970-11-01

Family

ID=24784142

Family Applications (1)

Application Number Title Priority Date Filing Date
ES361790A Expired ES361790A1 (en) 1967-12-26 1968-12-23 Flame detector

Country Status (6)

Country Link
US (1) US3551908A (en)
DE (1) DE1815968A1 (en)
ES (1) ES361790A1 (en)
FR (1) FR1598090A (en)
GB (1) GB1217930A (en)
NL (1) NL6818634A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD245588S (en) * 1976-03-02 1977-08-30 Hoge Henri H Ionization sensor for smoke detector
DE4433425C2 (en) * 1994-09-20 1998-04-30 Stiebel Eltron Gmbh & Co Kg Control device for setting a gas-combustion air mixture in a gas burner
DE10125574A1 (en) 2001-05-25 2002-11-28 Siemens Building Tech Ag Flame monitoring device with which an asymmetrical voltage is applied across burner and ionization electrode to detect presence of flame
DE102008028423B4 (en) * 2008-06-17 2012-02-09 Viessmann Werke Gmbh & Co Kg Method and device for determining at least one influencing variable of a combustion process

Also Published As

Publication number Publication date
GB1217930A (en) 1971-01-06
NL6818634A (en) 1969-06-30
FR1598090A (en) 1970-06-29
US3551908A (en) 1970-12-29
DE1815968A1 (en) 1969-08-07

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