CN2234110Y - Multi-function gas leakage alarm controller - Google Patents

Abstract

The utility model provides a multi-function gas leakage alarm controller, which is composed of a gas sensitive sensor, a detection circuit, a comparing circuit, etc. The utility model is characterized in that the utility model also comprises a language alarm circuit, a control circuit, and an AC power supply circuit, wherein, the language alarm circuit is composed of a comparator IC2, a special language chip IC5, a triode BG2, a resistor R11, a capacitor C5, a diode D2, and a loudspeaker, and the control circuit is composed of a comparator IC 3, a switch integrated device IC 6, a bidirectional thyristor BCR, resistors R1, R2, R7, R19, R20, a capacitor C4, and a diode D1. The utility model not only can automatically monitor the gas leakage situation, but also can send out the language and light alarm signal; meanwhile, the gas source can be automatically cut, and the exhaust fan can be automatically switched on for exhausting the gas. The utility model has the advantages of simple structure, complete function, high automatization, safety, etc.

Description

Multi-functional combustible gas leakage alarm controller

The utility model relates to the family expenses flammable gas alarm device, particularly a kind of multi-functional combustible gas leakage alarm controller that has language alarm.

The common optimal life fuel of town dweller that becomes of piped gas, liquefied petroleum gas (LPG), rock gas.But in use,, break, come off as proofed sleeve because use is careless or equipment quality is bad, stove fire is put out in wind, and soup overflows puts stove fire out by water, switch gas leakage, forget situation such as close, all can cause the leakage of inflammable gas, jeopardize major accidents such as people's life security and property loss.Therefore an urgent demand development is a kind of can detect and produce the safety guard of warning to combustible gas leakage.The patent No. is 94213930.5 to disclose a kind of patented product of gas safety self-actuated controller by name, mainly by gas sensor, testing circuit, comparator circuit, sound light alarming circuit, control circuit and the automatic detection gas leak of forming by air valve, cut off the self-actuated controller of gas source automatically.This controller has highly sensitive, and antijamming capability is strong, automaticity height, the characteristics that usable range is wide.But this patent is perfect not enough on function, is provided with the control function to exhaust fan in the control circuit, and language also of no use is intuitively informed people when gas leak takes place in the warning circuit, the function that should how to handle.And above-mentioned two kinds of functions are very important exactly.

The purpose of this utility model provides a kind of situation of monitoring of environmental combustible gas leakage automatically, can send language, visual alarm automatically again.And can when cutting off source of the gas automatically, open the multi-functional combustible gas leakage alarm controller of vent fan automatically.

Technical solution of the present utility model is: this alarm controller comprises the gas sensor that the induced environment combustable gas concentration changes, formations such as testing circuit, comparator circuit, optical alarm circuit, Lamplight displayer, gas relief valve, vent fan, source of the gas, gas appliance.This controller also comprises language alarm circuit, exhaust control circuit and the AC power circuit that receives the control signal of sending from comparator circuit respectively and give work.

Language alarm circuit of the present utility model is by comparer IC ₂, specific language alarm chip IC ₅, triode BG ₂, resistance R ₁₁, capacitor C ₅, diode D ₂, loudspeaker Y forms, comparer IC wherein ₂Positive input termination diode D ₂An end, negative input end is connected to previous stage comparer IC ₃Negative terminal, resistance R ₁₁With capacitor C ₅Point of contact also be connected on comparer IC ₂On the positive input terminal, IC ₂Output terminal be connected to the specific language chip IC ₅An end, IC ₅In addition two ends, an end ground connection, another termination triode BG ₂Base stage, BG ₂Collector be connected to the end of gas sensor MQ in the gas-sensitive detecting circuit, BG ₂Emitter connect an end of loudspeaker Y, the other end earth terminal of loudspeaker.

Said control circuit of the utility model and AC power circuit: by comparer IC ₃, contactless speed-sensitive switch integrated device IC ₆, bidirectional triode thyristor BCR, resistance R ₁, R ₂, R ₇, R ₁₉, R ₂₀, capacitor C ₄, diode D ₁Form.Comparer IC ₃Negative pole meet IC ₂Negative pole, IC ₃Electrode input end be connected to diode D ₁An end, resistance R ₇And capacitor C ₄Point of contact, capacitor C ₄Other end ground connection, resistance R ₇The other end and diode D ₁An end parallel connection.IC ₃Output terminal through resistance R ₁₉, R ₂₀Meet switch integrated device IC ₆1 pin, IC ₆2 pin connect positive source, IC ₆3 and 4 pin be connected to the two ends of gas relief valve JF, IC respectively ₆5 pin through resistance R ₁, R ₂Connect the control end of bidirectional triode thyristor BCR, the other two ends of silicon controlled one end ground connection, the other end connects the end of vent fan PS, another termination power of vent fan.

The utility model has highly sensitively compared with the prior art, and anti-interference energy is strong, the automaticity height, safe and reliable, can monitor out gas automatically and leak, and send language, visual alarm automatically, and cut off the inflammable gas source of the gas automatically, open the vent fan emission gases automatically.Be that a kind of function is very perfect, selectivity is good, alarm controller easy to operate.

Below in conjunction with accompanying drawing the utility model is illustrated:

Fig. 1 is a block diagram of the present utility model;

Fig. 2 is a circuit structure diagram of the present utility model;

Fig. 3 is a safety valve synoptic diagram of the present utility model.

As shown in Figure 1: this block diagram is made of jointly power circuit, gas sensor, testing circuit, comparator circuit, language alarm circuit, control circuit, optical alarm circuit, loudspeaker, Lamplight displayer, AC power circuit, gas relief valve, vent fan, gas source, gas appliance.

Power circuit wherein: by transformer B, rectifier 2L, voltage stabilizer T and filter capacitor C ₁, C ₂Form.

Gas-sensitive detecting circuit: by gas sensor MQ, potentiometer W ₁, thermistor R ₁₅Form.

Comparator circuit: by comparer IC ₁, IC ₄, resistance R ₈, R ₁₀Form.

Optical alarm circuit: by LED ₁, LED ₂, resistance R ₁₃, R ₁₂Form.

Language alarm circuit: by comparer IC ₂, the specific language chip IC ₅, triode BG ₂, resistance R ₁₁, capacitor C ₅, diode D ₂, loudspeaker Y forms.

Control circuit: by comparer IC ₃, contactless speed-sensitive switch integrated device IC ₆, bidirectional triode thyristor BCR, resistance R ₁, R ₂, R ₇, R ₁₉, R ₂₀, capacitor C ₄, diode D ₁Form.

The gas sensor MQ that the utility model is selected can only choose coal gas or liquefied petroleum gas (LPG), rock gas a kind of gas sensor of different model of gas sensitization wherein according to different use occasions.

As shown in Figure 2, principle of work of the present utility model is: in pure air, gas sensor MQ conductivity is low, potentiometer W ₁With thermistor R ₁₅Two ends are low-voltage, comparer IC ₁Output terminal also is an electronegative potential, LED ₁Positive pole obtains positive potential luminous (green), LED ₂(redness) do not work.Comparer IC ₂Output terminal also is an electronegative potential, the specific language chip IC ₅Do not work, loudspeaker Y is not sent language alarm sound.Comparer IC ₃Output terminal also is an electronegative potential, speed-sensitive switch integration member IC ₆Do not work, output terminal does not have 12 volts of DC voltage outputs, and gas relief valve JF does not work, not conducting of bidirectional triode thyristor BCR, and vent fan PS does not work.

When having gas such as coal gas to leak when environment, the conductivity of gas sensor MQ increases, potentiometer W ₁With thermistor R ₁₅Both end voltage increases.When gas concentration reaches certain value (by regulating W ₁Can select its sensitivity), IC ₁Output terminal is a noble potential, luminotron LED ₂It is shinny that positive pole obtains positive potential, LED ₁Do not work.Comparer IC ₂Output terminal also is a high voltage, language chip IC ₅Obtain operating voltage and work, by triode BG ₂Send the language alarm sound of " serge serge gas leak please fastly be got rid of not turn on switch " with loudspeaker Y.Comparer IC ₃Output terminal is a noble potential, switch integration member IC ₆Obtain control voltage, 12 volts of voltages of output terminal output direct current make safety valve JF work, close source of the gas.Controllable silicon BCR conducting simultaneously, vent fan PS obtains 220 volts of power supply entry into service exhausts.Pass through resistance R ₇, capacitor C ₄Delay circuit makes IC ₁After output terminal is electronegative potential, IC ₃Output terminal should keep that the time is noble potential more than 2 minutes, makes gas relief valve JF continue to close a period of time, and vent fan PS is remained in operation exhaust a period of time.

Usually moment after energising, because the characteristic of semiconductor of gas sensor MQ, violent variation can appear in its conductivity, and after several minutes, its conductivity is basicly stable, enters normal condition.This inherent characteristic of gas sensor.Can make circuit send the false alarm signal one time in the moment of switching on as not taking measures, eliminating this false positive signal is to pass through resistance R ₄, capacitor C ₃, comparer IC ₄Compensating circuit is realized, makes comparer IC ₁In the gas sensor stabilization process, remain electronegative potential output.

As shown in Figure 3: the gas relief valve JF that this controller adopted comprises valve member 1, seal membrane 2, valve gap 3, coil assembly 4, lid 5, moving iron core 6, axle 7 compositions.During ventilation, seal membrane is upwards backed down, make coal gas flow to the gas outlet from air intake opening by the pressure in the air intake opening gas pipe.When gas relief valve obtained voltage, coil assembly 4 had electric current to pass through, and formed magnetic field, and moving iron core 6 moves downward the connector that makes seal membrane 2 push down air intake opening and gas outlet under the action of a magnetic field, thereby closes source of the gas automatically.

The valve body of safety valve is to constitute with the aluminium foundry goods, and parts all are fixed in the main body of aluminium diecasting.Seal membrane 2 is to make with the nitrile rubber of anti-aging corrosion resistance gas, guarantees the serviceable life of gas relief valve.

Claims (3)

1, a kind of multi-functional combustible gas leakage alarm controller, be made up of power circuit, gas sensor, testing circuit, comparator circuit, optical alarm circuit, Lamplight displayer, gas relief valve, vent fan, gas source, gas appliance etc., it is characterized in that: it also comprises language alarm circuit, exhaust control circuit and the AC power circuit that receives the control signal of sending from comparator circuit respectively and give work.

2, multi-functional combustible gas leakage alarm controller according to claim 1, it is characterized in that: the language alarm circuit comprises comparer IC ₂, specific language alarm chip IC ₅, triode BG ₂, resistance R ₁₁, capacitor C ₅, diode D ₂, loudspeaker Y forms, comparer IC wherein ₂Positive input termination diode D ₂An end, negative input end is connected to previous stage comparer IC ₃Negative terminal, resistance R ₁₁With capacitor C ₅Point of contact also be connected on comparer IC ₂On the positive input terminal, IC ₂Output terminal be connected to the specific language chip IC ₅An end, IC ₅Other two ends one end ground connection, another termination triode BG ₂Base stage, BG ₂Collector be connected to the end of gas sensor MQ in the gas-sensitive detecting circuit, BG ₂Emitter connect an end of loudspeaker Y, the other end earth terminal of loudspeaker.

3, multi-functional combustible gas leakage alarm controller according to claim 1, it is characterized in that: control circuit and AC power circuit are by comparer IC ₃, contactless speed-sensitive switch integrated device IC ₆, bidirectional triode thyristor BCR, resistance R ₁, R ₂, R ₇, R ₁₉, R ₂₀, capacitor C ₄, diode D ₁Form comparer IC ₃Negative pole meet IC ₂Negative pole, IC ₃Positive pole be connected to diode D ₁An end, resistance R ₇And capacitor C ₄Point of contact, capacitor C ₄Other end ground connection, resistance R ₇The other end and diode D ₁An end parallel connection, IC ₃Output terminal through resistance R ₁₉, R ₂₀Meet switch integrated device IC ₆1 pin, IC ₆2 pin connect positive source, 3 and 4 pin are connected to the two ends of gas relief valve JF, IC respectively ₆5 pin through resistance R ₁, R ₂Connect the control end of bidirectional triode thyristor BCR, the other two ends of silicon controlled one end ground connection, the other end connects the end of vent fan PS.

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