JPS5762324A - Flame detecting circuit - Google Patents

Flame detecting circuit

Info

Publication number
JPS5762324A
JPS5762324A JP55139032A JP13903280A JPS5762324A JP S5762324 A JPS5762324 A JP S5762324A JP 55139032 A JP55139032 A JP 55139032A JP 13903280 A JP13903280 A JP 13903280A JP S5762324 A JPS5762324 A JP S5762324A
Authority
JP
Japan
Prior art keywords
flame
ignition
combustion
ion current
sensitivity
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
JP55139032A
Other languages
Japanese (ja)
Other versions
JPS6225935B2 (en
Inventor
Takatomo Matsumi
Yuji Nishiyama
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP55139032A priority Critical patent/JPS5762324A/en
Publication of JPS5762324A publication Critical patent/JPS5762324A/en
Publication of JPS6225935B2 publication Critical patent/JPS6225935B2/ja
Granted 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
    • F23N2229/00—Flame sensors
    • F23N2229/22—Flame sensors the sensor's sensitivity being variable

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)

Abstract

PURPOSE:To enable to correctly detect a misfire and an abnormal combustion by setting the flame sensitivity at the time of ignition to be higher than that for a combustion operation, in a flame detecting circuit utilizing the ion current of a flame. CONSTITUTION:Whether or not a fan heater is ignited is detected by a flame rod 27. In the begining stage of ignition, since the combustion flame is unstable and the flame rod 27 is not red hot, the ion current is small. To cope with this condition, the sensitivity for flame detection is enhanced so that the ignition can be securely confirmed. Although the flame is stable and the flame rod 27 becomes red hot to increase the ion current at the time of normal combustion, the current is reduced when an abnormal combustion occurs due to an insufficiency of air or the like. To detect the abnormal combustion securely, the detection sensitivity is set to be lower. The sentivity is automatically changed over by the lowering of the potential at the connecting point between a capacitor C4 and a resistor R15 which lowering is caused by the ion current arising from the ignition.
JP55139032A 1980-10-03 1980-10-03 Flame detecting circuit Granted JPS5762324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55139032A JPS5762324A (en) 1980-10-03 1980-10-03 Flame detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55139032A JPS5762324A (en) 1980-10-03 1980-10-03 Flame detecting circuit

Publications (2)

Publication Number Publication Date
JPS5762324A true JPS5762324A (en) 1982-04-15
JPS6225935B2 JPS6225935B2 (en) 1987-06-05

Family

ID=15235865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55139032A Granted JPS5762324A (en) 1980-10-03 1980-10-03 Flame detecting circuit

Country Status (1)

Country Link
JP (1) JPS5762324A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5782638U (en) * 1980-11-06 1982-05-21
JPS6143658U (en) * 1984-08-22 1986-03-22 三菱電機株式会社 Combustion control device
JPS6172925A (en) * 1984-09-17 1986-04-15 Matsushita Electric Ind Co Ltd Combustion control device
CN103293367A (en) * 2012-03-05 2013-09-11 深圳市合信达控制系统有限公司 Detection method of flame ionic current size and grounding alternating current power supply

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53144032A (en) * 1977-05-20 1978-12-15 Sanyo Electric Co Ltd Control equipment of combustor
JPS56103755U (en) * 1979-12-28 1981-08-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53144032A (en) * 1977-05-20 1978-12-15 Sanyo Electric Co Ltd Control equipment of combustor
JPS56103755U (en) * 1979-12-28 1981-08-13

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5782638U (en) * 1980-11-06 1982-05-21
JPS6143658U (en) * 1984-08-22 1986-03-22 三菱電機株式会社 Combustion control device
JPS6172925A (en) * 1984-09-17 1986-04-15 Matsushita Electric Ind Co Ltd Combustion control device
CN103293367A (en) * 2012-03-05 2013-09-11 深圳市合信达控制系统有限公司 Detection method of flame ionic current size and grounding alternating current power supply

Also Published As

Publication number Publication date
JPS6225935B2 (en) 1987-06-05

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