CN1020796C - Igniter capable of glowing again on flame-out - Google Patents

Abstract

The present invention relates to an automatic re-combustion igniter in case of fire extinguishment, which is composed of an ignition circuit, an ignition needle and a flame sensing circuit, wherein the ignition circuit generates high-pressure pulse which generates an electric spark after ionizing an air gap to ignite gas; while in fire extinguishment, the flame sensing circuit composed of Q1, Q2 and a flame sensing needle causes the ignition circuit to work again to ignite the gas, and the time for igniting the gas again is less than one second.

Description

Igniter capable of glowing again on flame-out

The invention belongs to igniter.

Gas is widely used in industry and daily life as the energy.Lighting of gas by manually developing into electronic ignition.The basic principle of electronic ignition is to produce a high-voltage pulse by electronic circuit, and this high-voltage pulse produces electric spark after with air gap ionization, and combustion gas is lighted.At some in particular cases, when the combustion gas of lighting is extinguished suddenly, need the people to reset ignition combustion gas is lighted, and, gas leakage then can take place, contaminated environment and breaking out of fire as people not at the scene the time.

The objective of the invention is when the combustion gas accident is extinguished, can make the automatic resume combustion of combustion gas in a short period of time.

Accompanying drawing is the electrical schematic diagram of igniter capable of glowing again on flame-out.

Main characteristics of the present invention are firing circuits, ignition electrode, and sense flame circuit has consisted of igniter capable of glowing again on flame-out, and said firing circuit is by triode Q₃，Q ₄Transformer T₁, resistance R₄Formed intermittent oscillation circuit, transformer T₁Output through rectification diode D₁The backward capacitor C of rectification₁，C ₂C is worked as in charging₁Capacitance voltage controllable silicon D when reaching certain numerical value₂Conducting, capacitor C₂Stored energy is to transformer T₂Discharge, make T₂The secondary high pressure that obtains, this high pressure makes ignition electrode produce electric spark and lights gas. At multiple tube Q₃Base stage on be connected to the flame-sensing needle circuit, said sense flame circuit is by multiple tube Q₁，Q ₂With at Q₁Base stage on be connected to flame-sensing needle and form, flame-sensing needle is high potential after combustion gas is lighted, multiple tube Q₁，Q ₂Conducting is so that the Q in the firing circuit₃Be high potential, firing circuit stops work, and when combustion gas was extinguished, flame-sensing needle was electronegative potential, multiple tube Q₁，Q ₂Be electronegative potential, Q₁，Q ₂Cut-off, multiple tube Q₃，Q ₄Again conducting, ignition electrode produces electric spark and lights gas.

Explain one embodiment of the present of invention in detail below by accompanying drawing.

Know by accompanying drawing, after power switch K closure, triode Q ₃From R ₁Obtain base current, so multiple tube Q ₃, Q ₄R3 is suitably adjusted in conducting, then makes Q ₃, Q ₄, transformer T ₁And R ₄The intermittent oscillation circuit of forming produces intermittent oscillation signal, transformer T ₁Secondary output through commutation diode D ₁Obtain direct current after the rectification, this DC voltage is simultaneously to capacitor C ₁, C ₂Capacitor C is worked as in charging ₁Capacitance voltage rise to diac D ₃During needed trigger voltage, controllable silicon D ₂So conducting is capacitor C ₂In stored energy to transformer T ₂Elementary release, T ₂The secondary high pressure that just obtained, this high pressure makes the igniting pin produce electric spark, lights combustion gas, simultaneously controllable silicon D ₂Conducting, make transformer T ₁Secondary short circuited, high direct voltage disappears, controllable silicon automatically shuts down, and enters the work in another cycle.After in a single day combustion gas lights, just flame-sensing needle is burnt to red-hot.Flame-sensing needle is the higher metal material of fusing point, as stainless steel, at this moment with triode Q ₁The sense flame that base stage links to each other obtains high potential, and this high potential makes Q ₁, Q ₂The multiple tube conducting of forming, at this moment triode Q ₃Base stage just no longer be electronegative potential but high potential, Q ₃End, by Q ₃, Q ₄, T ₁, R ₄The intermittent oscillation circuit of forming quits work transformer T ₁No-output, firing circuit quits work.

If (K switch closure) meets accident flame-outly in the igniter use, the inductive needle temperature reduces, and at this moment inductive needle is an electronegative potential.While triode Q ₁Base stage also be electronegative potential, Q ₁, Q ₂, the multiple tube of composition ends, at this moment Q ₃Base stage be negative potential, Q ₃Q ₄Conducting, Q ₃, Q ₄, T ₁, R ₄The intermittent oscillation circuit of forming produces vibration, transformer T ₁The inferior utmost point has voltage output, T ₂Produce electric spark, rekindle gas.

The present invention is simple in structure, increase a few components and promptly accomplish resume combustion on firing circuit, and the resume combustion time was less than for 1 second.It may be noted that here this patent has provided the basic structure of igniter capable of glowing again on flame-out,, can make various distortion under the conception situation of patent of the present invention.

Claims (2)

1, igniter capable of glowing again on flame-out has firing circuit and igniting pin, and said firing circuit is by triode Q ₃, Q ₄, transformer T ₁, resistance R ₄Form intermittent oscillation circuit, transformer T ₁Output through commutation diode D ₁After the rectification to capacitor C ₁, C ₂C is worked as in charging ₁Capacitance voltage reach diac D ₃During required voltage, controllable silicon D ₂Conducting, capacitor C ₂Stored energy is to transformer T ₂Discharge, make T ₂The secondary high pressure that obtains, this high pressure makes the igniting pin produce electric spark, lights gas, feature of the present invention is multiple tube Q ₃Base stage on be connected to sense flame circuit, said sense flame circuit is by multiple tube Q ₁, Q ₂With at Q ₁Base stage on be connected to flame-sensing needle and form, after combustion gas was lighted, flame-sensing needle was a high potential, multiple tube Q ₁, Q ₂Conducting makes Q in the firing circuit ₃Be high potential, firing circuit quits work, and when the combustion gas accident was extinguished, flame-sensing needle was an electronegative potential, multiple tube Q ₁Q ₂Be electronegative potential, Q ₁, Q ₂End the multiple tube Q of firing circuit ₃, Q ₄Conducting again, the igniting pin produces electric spark, lights gas.

2, it is characterized by flame-sensing needle by the automatic resume combustion igniter of the described flames of war of claim 1 is refractory metal.

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