CN2047759U - Automatic control range for gaseous fuel - Google Patents

Abstract

The utility model relates to an automatic control system of an automatic control range for the gaseous fuel, comprising two parts of an electronic integrated circuit and an axial flow magnetic valve. A whole control part is small in volume and is provided with driving elements such as wheels, shafts and rods, which becomes an integrated practical cooker. The utility model has the function of automatically realizing to ignite, heat by the big fire in the timing mode, heat by controlling the temperature control, heat by conversing to the small fire in the timing mode, alarm in the gas leakage and the gas cut off by the fire warning and cut off the gas by the circuit broken. The utility model has three audible signals of breaking and alarming, which can make the people save the time and the combustion gas and is safe.

Description

Automatic control range for gaseous fuel

This device relates to a kind of combustion gas that is used to heat and controls kitchen range automatically.

The extensive exploitation utilization of the combustible gas energy and the quickening of people's modern life rhythm press for a kind of safe, reliable, practical combustion gas and control kitchen range automatically at present.

To existing gas kitchen ranges, comprise that I have submitted a report asking for utility model patent (number of patent application: 87201716) " gas burner automatic controller " device, the self-insurance ability after existing facility itself to break down, the practicality deficiency that is combined as a whole with kitchen range and the weakness of complicated in mechanical structure.

The purpose of this utility model is to provide a kind of practicality, safety, frame for movement simple and reliable, and kitchen range are controlled in the integrated combustion gas that fault self-insurance ability is strong automatically.

To achieve these goals, this device adopts the combination of integrated circuit and axial-flow type magnetic valve, has satisfied above-mentioned requirements.Whole system by: stop the supple of gas or steam circuit, newspaper of power supply, firing circuit, timing control circuit, temperature control circuit, leak detection stops seven parts of warning circuit and electromagnetic gas valve and forms.

Three axial-flow type magnetic valves are arranged, as total AVSV Air Vent Solenoid Valve (A) of figure one in the device; Big fire AVSV Air Vent Solenoid Valve (B); Little fiery AVSV Air Vent Solenoid Valve (C).

It is the operation principle of control automatically:

One, magnetic valve operation principle

Its structure such as figure two are by valve pocket (M ₁), electromagnetic activity valve body (M ₂), spring (M ₃), magnetizing coil (M ₀₁) (M ₁₁) (M ₂₁) and enterprising gas-tpe fitting (M ₅), following escape pipe joint (M ₆), valve sits (M ₇), valve (M ₈) form.

When the coil turn-on current of valve body (A), (B) and make valve (M ₈) open, by combustible gas stream and when lighting, be the big fire warm-up mode; When valve body (A) (C) the coil turn-on current and make its valve (M ₈) open, during by combustible gas stream and by igniting, be little fiery warm-up mode.As the coil (M that makes total valve body (A) owing to leakage alarm ₀₁) outage and make valve (M ₈) when closing, closed gas flow is flame-out.

Movable valve (M ₂) be to be assemblied in valve pocket (M with being slidingly matched ₁) in, under the usual state, it is the effect that is subjected to gravity own and spring thrust, and valve is sat (M ₇) lower end is through the conical valve (M of precise finiss ₈) close; Can not ventilate.As magnetizing coil (M ₀₁) when passing through electric current, movable valve (M ₂) because of the effect that the is subjected to electromagnetic attraction attraction that makes progress, conical valve (M ₈) open, combustible gas stream is from last air inlet pipe (M ₅) flow into, the valve of flowing through is sat (M ₇) cavity, conical valve (M again flows through ₈), to following escape pipe (M ₆) flow out, deliver to kitchen range confession burning heating and use.

Magnetic valve of the present utility model adopts big in short-term electric current (1000mA) starting, and little electric current (160mA) is kept the principle of adhesive.So both save electric energy, saved copper material, reduced volume and weight again.The I that while coil exciting curent is produced ²The R heat reduces, and has improved the life-span and the reliability of facility.

Two, circuit working principle

Entire circuit such as figure three are by transformer B, rectifier D ₁～D ₄, voltage-stablizer 7805, trigger timer t ₀～t ₄, warning circuit (comprises BG ₆, BG ₇, BG ₈R6～9, C5～6, loudspeaker d) and firing circuit form.

(1) circuit of stopping the supple of gas or steam of reporting to the police

The gas leakage test section is as sensor detector by the MQ-N gas sensor among the figure three.It converts voltage signal to detecting the certain density imflammable gas that leaks outside, and this voltage signal is through resistance R ₁, potentiometer W ₀The current potential of (P) point is raise, i.e. trigger t ₀The current potential of input (2), (6) raise.When its current potential is elevated to when being about 2 volts trigger t ₀Overturn, the current signal of output (3) output triggers controllable silicon SCR, and so the controllable silicon SCR conducting is relay coil J turn-on current and adhesive.Because the current coil M of magnetic valve (A) ₀₁Be normally-closed contact 1,2 two ends of receiving relay J, so the adhesive of relay J has caused the current coil M of magnetic valve (A) ₀₁Outage, valve pocket (M ₁) interior movable valve (M ₂) attraction and spring (M because of losing magnetic force ₃) thrust, it is fallen valve (M ₈) close, it is flame-out to cut off gas circuit.

(2) regularly and delay circuit: regularly and the realization of time-delay be to be that the integrated circuit of NE555 uses with the formation timer that cooperates of a small amount of discrete component by adopting a kind of model.It has triggering input (2), thresholding current potential input (5) and power take-off (3).Time-delay is by regulator potentiometer W the charging rate of capacitor C to be controlled.The voltage trailing edge that triggers input (2) triggers input time, is exactly the time delay initialization moment.In carving at this moment, output (3) will be exported positive drive current.Treat capacitor C ₁When charging to Upper threshold threshold potential (about 4.8V), time-delay stops, and to make its output current potential be zero.

(3) for example: in figure three circuits, as the closure power switch K that supplies gas ₀After ,+5V dc source is simultaneously to t ₀～t ₄The power supply of each clocked flip-flop.The solenoid M of at this moment total breather valve (A) ₀₁By the flow through normally-closed contact 1,2 of relay J of+electric current that the 5V power supply provides, K switch ₀, diode D ₇And solenoid M ₀₁Extremely hold, flow through the operating current of keeping of 160mA.But this current value deficiency is so that movable valve (M ₂) the starting adhesive, so ought then press K ₁Behind the button, the starting current that 1000mA just arranged flows through button switch K by+12V power supply ₁Contact (1), (2), make the coil M of total magnetic valve (A) ₀₁Coil M with big fire magnetic valve (B) ₁₁To end formation loop, power supply ground, so the movable valve (M of total AVSV Air Vent Solenoid Valve (A) ₂) and the movable valve (M of big fire magnetic valve (B) ₂) all upwards attracted and ventilate.

Meanwhile, owing to adjusted regularly potentiometer W in advance ₁As temperature control and big fire timer t ₁The negative pulse trigger current of trigger end (2) be through button switch K ₁The closure of contact (3), (4) triggers, and at its output (A) some output current, causes transistor BG ₃Conducting makes the coil M of big fire magnetic valve (B) ₁₁The operating current of keeping by 160mA.Like this, both made and pressed K ₁The openhanded of button takes off, and also has this electric current to keep the gas circuit conducting of big fire magnetic valve (B).

In addition, pressing K ₁In the time of button, the electric current resistance R of also will flowing through ₁₅, N holds to power supply ground through the igniting integrated device, and sends a high voltage pulse at the output of igniter N, produces spark discharge at the fire door place of giving vent to anger, and the combustion gas of connecting is in time lighted.

So far, heating cooler has entered the timing automatic heated condition of big fire.

After having finished the time that big fire regularly heats, be transferred to little fiery warm-up mode automatically as need, through regulating regularly potentiometer W of little fire ₂And control capacitor C ₂Charging rate.So just utilize at big fire timer t ₁Output by the time, (A) point voltage is reduced to zero potential, and at C ₂, W ₂Between the trailing edge voltage signal appears, this trailing edge voltage is delivered to t ₂Input (2) to little fiery timing unit t ₂Trigger, and by C ₂Through t ₁Output pour into discharge as electric current, make timer t ₂Upset enters the time-delay state, simultaneously at t ₂Output (B) some output one forward current, control transistor BG ₄Conducting is to the coil M of little thermoelectricity magnet valve (B) ₂₁Connect the operating current of keeping of 160mA.Meanwhile again from C ₃, W ₃Between the trailing edge voltage signal of drawing deliver to timer t ₃Input (2), make t ₃Trigger the upset time-delay, at its output C point output one forward current, through resistance R ₅, transistor BG ₅Base stage, make transistor BG ₅Conducting, thus the coil M of little thermoelectricity magnet valve (C) given ₂₁The starting current that lasts 2 seconds 1000mA is provided.Timer t ₃After having finished the time-delay in 2 seconds, output (C) point is got back to zero potential, makes transistor BG ₅End, so the starting current of 1000mA also stops.Thus, finished the effect of starting, and by BG ₄The operating current of keeping of the 160mA of conducting makes magnetic valve (C), continues to keep aeration status.

Give the little fire put after automatic heat time heating time when having finished, because capacitor C ₂Through timer t ₁(3) end constantly pour into electric current and discharge over the ground, and capacitor C ₂Anodal current potential will raise gradually, when voltage rises to 4.8 volts, and timer t ₂Output (B) point get back to zero potential, transistor BG ₄End, make the coil M of little thermoelectricity magnet valve (B) ₂₁Electric current be zero.So movable valve (M of little thermoelectricity magnet valve (C) ₂) fall naturally, with valve (M ₈) close, stop to supply gas and stop working.

(4) temperature control heater circuit

Temperature transducer is that the thermistor in a thin metallic tubd and the pipe of packing into is formed, and it has negative temperature-coefficient of electrical resistance.

Potentiometer Wt among the figure three is the temperature control adjuster.When K switch ₂After pulling the M point, the timer of big fire temperature control at this moment t ₁As temperature control module operation, by being connected on+potentiometer Wt, thermistor Rt and resistance R that the 5V power supply is held to power supply ground ₁₂Dividing potential drop, take out voltage control signal from the M point, through K switch ₂Deliver to t ₁Input (2) (later circuit working principle is the same).Along with the rising of heated medium temperature, the corresponding decline of thermosensitive resistance, the current potential that M is ordered also correspondingly raises.When current potential rises to temperature control timer t along with the rising of temperature ₁The about 4.8v of last threshold values the time, timer t ₁Overturn, its output (A) point is reduced to zero potential, heats thereby finished temperature control.

(5) sound newspaper power failure road

At little fiery timing unit t ₂Output (B) when point voltage is got back to zero potential, at W ₄, C ₄Between the voltage trailing edge triggering signal of drawing deliver to timer t ₄Input (2), to timer t ₄Trigger time-delay, make timer t ₄The DC voltage of a 4.8V of output (D) some output, an operating current that lasted for 5 seconds is provided for newspaper power failure road.Timer t after 5 seconds ₄The voltage of output (D) point get back to zero, newspaper stops whistle and stops.

Newspaper stops and the operation principle of warning circuit is: when circuit through R ₇During the power supply of input+5V, the electric current resistance R of flowing through ₇, diode D ₂₁To capacitor C ₅Charging.At unijunction transistor BG ₆E point output one sawtooth voltage signal, this signal is to by transistor BG ₇, BG ₈, resistance R ₉Capacitor C ₆The tone currents of forming that audio frequency oscillator produced is modulated, and the loudspeaker d so the electric current after this modulation is flowed through makes it to send newspaper and stops the sound.Because contact (3) (4), D from J ₂₄Or D ₂₅Or R ₁₀The magnitude of voltage height of sending here is different, three kinds of different warnings or newspaper have also just occurred and has stopped the sound.

Claims (5)

1, to using combustible gas to heat the device of automatic control, this device has three axial-flow type electromagnetic valve bodies (A), (B), (C) and by NE555 integrated circuit and capacitor C ₁, C ₂, C ₃, C ₄, potentiometer W ₁, W ₂, W ₃, W ₄Constitute and trigger timer t ₁, t ₂, t ₃And t ₄, it is characterized in that triggering timer t ₁, t ₂, t ₃And t ₄Be subjected to leak detector MQ-N and timing potentiometer W ₁, W ₂, W ₃, W ₄Restriction by to the coil M of axial-flow type electromagnetic valve body (A), (B), (C) ₀₁, M ₁₁, M ₂₁Electric current do switch control, and to each gas circuit valve (M ₈) control that opens or closes.

2, device according to claim 1 is characterized in that leak detector MQ-N is through trigger t ₁, controllable silicon SCR control relay J circuit, thereby control opening or closing of total electromagnetic valve body (A) gas circuit.

3, device according to claim 1 is characterized in that and timer t ₁The triode BG that is connected of output (3) ₃Emitter stage be connected on circuit with the coil of big fire magnetic valve (B).

4, device according to claim 1 is characterized in that and timer t ₂The triode BG that is connected of output (3) ₄Emitter stage be connected on circuit with the coil of little thermoelectricity magnet valve (C).

5, according to claim 2,3,4 described devices, it is characterized in that electromagnetism valve pocket (M ₁) the outer coil (M that is equipped with ₆), in movable valve (M is housed ₂), lower end valve (M ₈) the angle of inclination be 25 °～35 °.

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