JPS5481534A - Safety valve controlling circuit - Google Patents

Safety valve controlling circuit

Info

Publication number
JPS5481534A
JPS5481534A JP14946777A JP14946777A JPS5481534A JP S5481534 A JPS5481534 A JP S5481534A JP 14946777 A JP14946777 A JP 14946777A JP 14946777 A JP14946777 A JP 14946777A JP S5481534 A JPS5481534 A JP S5481534A
Authority
JP
Japan
Prior art keywords
flame
resistor
switched
fet
burner
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.)
Pending
Application number
JP14946777A
Other languages
Japanese (ja)
Inventor
Eiichi Oizumi
Takao Tomizawa
Shuji Ishizuka
Toshinori Arai
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14946777A priority Critical patent/JPS5481534A/en
Publication of JPS5481534A publication Critical patent/JPS5481534A/en
Pending 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
    • F23N2229/12—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)
  • Control Of Combustion (AREA)

Abstract

PURPOSE:A safety valve controlling circuit which realized high responsive flame detection with a simple circuit configuration by controlling combustion utilizing the electric characteristic of flame (rectifying property) and confirming the existence of burner flame. CONSTITUTION:When alternating voltage is applied to the input power source terminals 1-1' and there is flame between burner electrodes 3, the alternating voltage applied to these ends is rectified by the rectifying effect of the flame and this flame current is charged to a condenser 5 through a resistor 6. The charging time of this condenser 5 is determined by the flame impedance between the burner electrodes 3 and the resistance of a resistor 4, and the discharging time is determined by the resistance of resistor 6. Then, if the voltage between the gate and drain of a P- channel MOS-type FET 7 rises and the FET 7 is switched on, the electromagnetic valve 8 connected in the load circuit of the FET is switched on, and so the LET 9 connected in series with the electromagnetic valve 8 is switched on showing that flame is detected.
JP14946777A 1977-12-12 1977-12-12 Safety valve controlling circuit Pending JPS5481534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14946777A JPS5481534A (en) 1977-12-12 1977-12-12 Safety valve controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14946777A JPS5481534A (en) 1977-12-12 1977-12-12 Safety valve controlling circuit

Publications (1)

Publication Number Publication Date
JPS5481534A true JPS5481534A (en) 1979-06-29

Family

ID=15475765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14946777A Pending JPS5481534A (en) 1977-12-12 1977-12-12 Safety valve controlling circuit

Country Status (1)

Country Link
JP (1) JPS5481534A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4881141A (en) * 1972-01-31 1973-10-30
JPS5019023A (en) * 1973-06-05 1975-02-28
JPS50104693A (en) * 1974-01-22 1975-08-18

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4881141A (en) * 1972-01-31 1973-10-30
JPS5019023A (en) * 1973-06-05 1975-02-28
JPS50104693A (en) * 1974-01-22 1975-08-18

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