CN2085919U

CN2085919U - Automatic protection igniter for igniting and putting-out fire of gas range

Info

Publication number: CN2085919U
Application number: CN 90214368
Authority: CN
Inventors: 顾为东
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-07-21
Filing date: 1990-07-21
Publication date: 1991-10-02

Abstract

The utility model discloses an automatic lighter installed on a gas range, comprising a high-voltage pulse generator, an electric discharge head, a normally-on sensitive switch and a normally-off thermo-switch. With a double-oscillation circuit, a high-voltage electric discharge is generated to produce fire-sparks which ignite the gas, and the normally-on sensitive switch automatically switches on the ignition in the meantime of switching-on a gas valve. On the occasion of accidental flameout, the thermo-switch automatically switches on the ignition to avoid the danger resulted by gas leakage. Thus, the utility model has two functions of ignition and automatic protection of flameout. The utility model has the advantages of simple structure, safe and convenient operation.

Description

Automatic protection igniter for igniting and putting-out fire of gas range

The utility model is the igniter of switch gas range, the igniter of the resume combustion of particularly lighting a fire automatically when the gas range accident extinguishing.

Commercially available various rifle formulas or be directly installed on box ignition on the gas range to be used for the gas range igniting more universal, yet these igniters can only manual ignition, can not igniting resume combustion automatically under the flame-out situation of accident, thereby in running into wind or pot factors such as thing overflows when causing gas burner to extinguish, often because of in time not found to emit in vain a large amount of coal gas, not only cause waste but also be absolutely unsafe.

The purpose of this utility model provides a kind of can not only the igniting automatically, and when accident is flame-out the also gas range igniter of ignition protection automatically.

Igniting of the utility model gas range and the flame-out igniter of protection automatically are made up of a high-voltage pulse generator, discharge head and a microswitch of often opening and a normally closed thermoswitch.High-voltage pulse generator is a box shell, internal electric source and electrical equipment, and be linked to be the loop by lead, it prolongs the electronic circuit with existing gas range ignition, comprises power supply Ec, triode BG ₁, resistance R ₁And transformer T ₁Oscillation circuit forming and with diode D ₁, capacitor C ₂, resistance R ₂, R ₃, capacitor C ₁, diode D ₂, controllable silicon 3CT and transformer T ₂The secondary oscillation circuit of forming, transformer T ₂The two ends of inferior coil be connected with discharge head F.The microswitch K that the utility model is often opened ₁With normally closed thermoswitch K ₂Be series at negative pole and the transformer T of power supply Ec ₁Main coil between.Wherein, K ₁Form by two metal spring leafs, when gas range valve closing (being that valve knob is in the closed position), K ₁A reed be in stress and often open, when the gas range valve opening, this reed loses the external force effect and closure; K ₂Be by two or more different metal memorial alloy reeds of thermal coefficient of expansion, this reed is bent into U-shaped, one end of U-shaped is connected with the lead of above-mentioned series circuit, the other end contacts with lead at normal temperatures and forms normally-closed contact, this normally closed switch stretches out owing to degrees of expansion is inequality the various metal heated back of reed, and the contact is disconnected.During installation, the box electro coupled oscillator is fixed in a certain position of gas range, fixes a driving lever between gas range valve and knob, this driving lever just in time props up microswitch K when being in the position of " pass " at knob ₁A reed, make K ₁Be in the state of disconnection, thermoswitch K ₂Be fixed in by the gas range duration and degree of heating, make its temperature-sensitive reed can be approaching with flame.When coal gas is in closed condition, K ₁Disconnect, circuit is obstructed, this igniter no-spark, and when stirring knob unlatching gas valve, driving lever leaves K along with rotating to an angle ₁Reed, K at this moment ₁Closure, circuit is connected, discharge head flashing, some coal gas.The flame of coal gas makes thermoswitch K ₂Memorial alloy reed distortion, K ₂The contact disconnects immediately, and circuit is obstructed, and the discharge head spark stops, and gas range is a normal combustion, and thing overflows and during accident extinguishing in wind or pot, because of the decline of fray-out of flame temperature, and thermoswitch K ₂Restore closure rapidly, circuit is connected, and discharge head is set fire again and spent the some coal gas.

In sum, the utility model igniter is manual ignition under normal circumstances, and when the gas burner accident is extinguished, can light automatically.Because memorial alloy to being quick on the draw of variations in temperature, therefore can be connected circuit rapidly in the extremely short time, igniting automatically avoids the flame accident to extinguish and the gas poisoning and the fire hazard that cause, plays the effect of automatic protection.

Below in conjunction with description of drawings embodiment of the present utility model.

Fig. 1 is the circuit diagram of electro coupled oscillator.

Fig. 2 is the catenation principle figure of the igniting of the utility model gas range and flame-out protection igniter automatically and gas range.

Among Fig. 1, as normally opened contact K ₁Closure, circuit is connected, triode BG ₁With resistance R ₁, transformer T ₁The circuit formed of first coil vibrate, and at T ₁Inferior coil on produce induced current, through diode D ₁Rectification is to capacitor C ₁Charging.Resistance R ₂, R ₃, capacitor C ₁And diode D ₂Switching and the frequency of the circuits for triggering control controllable silicon 3CT that forms, when controllable silicon 3CT conducting, capacitor C ₂To transformer T ₂First coil discharge, and at T ₂Inferior coil in produce induced electromotive force, form nearly ten thousand volts of momentary pulse voltages, make discharge head F generation electric spark.

Among Fig. 2, the 1st, the duration and degree of heating of gas range, coal gas is by the ejection of the aperture 1-1 around it, the 4th, the gas valve of gas range, coal gas feeds duration and degree of heating 1 again from pipeline, and valve 4 links to each other with knob 5 by rotating shaft 6, fixes a driving lever 6-1 on the rotating shaft 6, the casket body of the electro coupled oscillator 3 of the utility model igniter is fixed on the suitable position of gas range support, discharge head F and thermoswitch K ₂Be fixed in position, microswitch K near jet aperture 1-1 ₁Be fixed in can with the contacted position of driving lever 6-1, when knob was in the position of " pass ", driving lever just in time propped up K ₁A reed contact is disconnected.

When needing to use gas, rotation knob 5 is to the rotation of " opening " direction, and rotating shaft 6 rotates to an angle thereupon and valve 4 is opened, and coal gas feeds duration and degree of heating 1 by pipe 2, and driving lever 6-1 breaks away from K ₁Reed, K ₁Auto-closing, electro coupled oscillator 3 energisings, discharge head F emits electric spark and lights gas-fired, and the high temperature of flame makes thermoswitch K ₂Distortion, K ₂The contact disconnects, and circuit is obstructed, and F stops to emit electric spark, and gas range is a normal combustion.Thing overflows when making fray-out of flame thermoswitch K in because of wind or pot ₂Closure, and K ₁Continue closure because of knob is in "open" state, thereby circuit is logical again, the F flower of setting fire, the automatic resume combustion of coal gas, K ₂Disconnect once more.

Claims

1, gas range igniting and the flame-out igniter of protection automatically have a high-voltage pulse generator and discharge head, and high-voltage pulse generator comprises box shell and electronic loop, and this loop comprises power supply EC, triode BG ₁, resistance R ₁And transformer I ₁Oscillation circuit forming and with diode D ₁, capacitor C ₂, resistance R ₂, R ₃, capacitor C ₁, diode D ₂, controllable silicon 3CT and transformer T ₂The secondary oscillation circuit of forming, transformer T ₂The two ends of inferior coil be connected with discharge head F, it is characterized in that a microswitch K who often opens is arranged ₁With normally closed thermoswitch K ₂Be series at the negative pole transformer T of power supply EC ₁Main coil between, K ₁Be made up of two metal spring leafs, the driving lever that is fixed on the rotating shaft of gas valve is controlled K ₂Be by two or more metal memorial alloy reeds.

2, as described gas range igniting of above-mentioned claim 1 and the flame-out igniter of protection automatically, it is characterized in that normally closed thermoswitch is the memorial alloy of U-shaped.