CN2051700U - Fully automatic infrared induced water valve - Google Patents

Abstract

The utility model relates to a fully automatic infrared induced water valve, which can control the outflow of liquid from the end of pipelines automatically using infrared induction. The utility model has compact structure and cheap price. The utility model has a reflection type infrared sensor, a signal transformation control circuit which is composed of a modulation pulse generator, a gating amplifying anti-jamming network, an amplifying rectification anti-jamming network, and a Schmitt trigger, and an executive circuit. The fully automatic infrared induced water valve which can be continuously adjusted within the range of 0-30 cm has high control precision, fast response speed, and strong light anti-jamming performance.

Description

Fully automatic infrared induced water valve

The utility model relates to the valve that a kind of automatic pilot line terminal liquid flows out, particularly utilizes the automatic pilot line terminal of infrared induction liquid to flow out.

As everyone knows, with handling the traditional type water tap that the valve rod of sealing plug moves up and down, the germ that is easy to carry about with one in the use, cross infection, extremely unhygienic are housed in valve body.In order to address this problem, the various instant self-closing contact driving type water taps (or valve) of specified rate water of emitting in set time are come out one after another; Although this class formation is not touched water tap after water, the water time is restricted, and can not optionally prolong or shorten, and it is convenient inadequately to use.China's patent CN86204768U provides a kind of bridge rectifier disequilibrium output DC stream of making after human body is near sensing plate for this reason, and signal makes the relay conducting and then makes electromagnet be in the human body induction type automatic faucet of water supply working state behind three extremely conventional amplification circuits; This structure hand stretch water, hand receives water and stops, and has simple in structure, easy to use, cheap advantage; Electric bridge adjustment difficulty is big, functional reliability is subjected to such environmental effects, the higher deficiency of rate of fault but also exist, so speed of response is poor, control accuracy is low.Have the characteristic that decisive range is far away, speed of response is fast, precision is high, the life-span is long based on infrared ray sensing, all competitively developing and developing the full-automatic water tap of infrared induction both at home and abroad at present.Insta-Clens board hand washing machine (price is 1750 dollars), Meai-Clens board hand washing machine (price is 2950 dollars) and the high-grade Stat-Scrub board hand washing machine (price is 19500 dollars) of the exploitation at present of U.S. Pacific Ocean Biosys Corp., is furnished with sterlizing unit, technical sophistication, cost an arm and a leg, manufacture difficulty is big, maintenance difficult.The Taiwan Industries, Inc of escaping forever also develops AF type single tube and two-tube serial infrared induction automatic faucet new product in recent years, on probation showing, this kind structure and conventional construction relatively save time more than 53%, economize on water 57%, can reduce water rate 50%; The said firm is the price of 232.5 yuan to 291.4 yuan of RMB with the 50%(of international price) provide to China, its price is still higher.China patent CN88201967 has proposed a kind of reflective infrared control hand washing device, adopt direct current generator to drag a mechanical deceleration device, thereby the spool of driving device water valve produces the control that opens and closes that an angular displacement realizes water valve, complex structure, processing difficulties cause the higher weakness that is difficult to avoid with mechanical failure of manufacture cost; Again owing to adopt conventional signal amplification circuit, therefore also exist natural light to influence, environmental conditions and the background objects thereof of phototransistor operation point deficiency to working reliability influence.

The purpose of this utility model is to provide a kind of compact structure, the good especially full-automatic infrared induction of modified model of performance cheap, that speed of response is fast, control accuracy is high, use is easy to maintenance, anti-light disturbs to come water valve.

Its solution is: this valve is made of by being assembled in the valve cap reflection infrared sensor, signal conversion control circuit and executive circuit, and above-mentioned reflection infrared sensor receives tube-launched electrical pulsing signal through the modulation pulse generator modulation by adopter and forms; The signal conversion control circuit amplifies anti-interference network, the amplification anti-interference network of rectification and scmitt trigger circuit by modulation pulse generator, filter amplifier, gating and forms; Executive circuit is formed by fly-wheel diode, DC relay and solenoid valve.

Full-automatic infrared induction according to the such scheme manufacturing comes water valve, because what adopt is the electronic technology that Sampling and gating amplify, so the performance that anti-light disturbs is strong especially, not only speed is fast but also especially accurately and reliably to the response of testing signal; Owing to having adopted digital integrated electronic circuit and being welded on a circuit board, so compact structure is simple, price only is 20% of an aforementioned AF type infrared induction full-automatic water tap simultaneously; Under voltage functuation ± 15%, 0～60 ℃ of temperature maintenance, the above-mentioned condition of relative moisture 98%, decisive range still can remain on scope and the reliably working of 0～30cm in addition.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the working principle block diagram that the full-automatic infrared induction that the utility model proposes comes water valve.

Fig. 2 is the circuit diagram that this full-automatic infrared induction comes water valve.

Fig. 3 is the structure sectional view that this full-automatic infrared induction comes water valve.

As shown in Figure 1, through modulation pulse generator (3) modulation, frequency is that 1KHZ, dutycycle are the electrical pulsing signal of 1:20, emission tube emission through reflection infrared sensor (1), as the detected signal (9) of hand or thing when entering action range, receiving tube receives tube-launched pulse signal through modulation pulse generator (3) modulation, and sends into the first order filter amplifier (4) of signal conversion control circuit (2).Electrical pulsing signal is amplified into the glutinous small-mouthed jar dirt of partial arteries and veins distant ⊥ ǚ fan huge rock  through filtering and relaxes), carry out partial amplification behind the electrical pulsing signal that elimination is disturbed.Electrical pulsing signal after the amplification is sent into further amplification of the anti-interference network of amplification rectification (6), paraphase and the detection of the third level, be defeated by (7) one of scmitt trigger circuits at last and trigger DC level, the output state of scmitt trigger circuit (7) is changed, thereby the normally opened contact that promotes the DC relay in the executive circuit (8) is connected solenoid valve and is realized whole overall process of coming water automatically.

As seen in Figure 2, modulation pulse generator (3) is that the time radix word IC 1 with NE555 is the circuit of core.When circuit is connected power supply, because capacitor C ₁Do not have enough time as yet to charge, so the 2. pin of IC1 is in zero-level, the 3. pin of leading system IC1 is a high level, and then power supply is through resistance R ₁R ₂To capacitor C ₁Charging becomes low level, capacitor C until the 3. pin of IC1 ₁Through resistance R ₂Through the 7. pin discharge of IC1, the 3. pin of its IC1 then becomes high level from low level again, capacitor C again ₁Be recharged once more, go round and begin again, form vibration.Wherein, the 4. pin of IC1 is the set end, guarantees the circuit proper functioning and unlikely unsettled; Capacitor C ₂The interference signal of the 5. pin of elimination IC1 then, capacitor C ₃The then interference of elimination Transmitted pulse on operating voltage.Diode D ₁With current-limiting resistance R ₃Then limit the operating current of reflection infrared sensor (1) emission tube HG; Receiving tube DU is receiving the infrared pulse signal that the reflection of detected hand or thing comes, biasing resistor R ₄Give the normal working of a direct current of receiving tube DU.Filter amplification circuit (4) is by triode BG1, capacitor C ₄C ₇And resistance R ₅R ₆R ₇R ₈Form.By the adopter DU reception of reflection infrared sensor (1) and the electrical pulsing signal of reconciling, through capacitor C ₄The undesired signal of its low frequency of elimination, and the base stage of delivering to triode BG1 amplifies is not in order to allow alternating signal feed back to the base stage of BG1, set capacitor C ₇Alternating signal is bypassed resistance R wherein ₅R ₆R ₇R ₈For triode BG1 is provided with a suitable quiescent operation point.It is by triode BG2, clamp diode D that gating amplifies anti-interference network (5) ₂D ₃D ₄, reference diode DW ₁, potentiometer W ₁, capacitor C ₆And resistance R ₉R ₁₁R ₁₂R ₁₃R ₁₉Form.Because diode D ₄Positive pole connect the voltage stabilizing point, then as potentiometer W ₁Accent when the upper end, coupling capacitance C ₅Electrical pulsing signal is delivered to the base stage of triode BG2, and when the electrical pulsing signal of modulation was high level, emission tube HG ended, simultaneously diode D ₁Conducting is through resistance R ₁₂R ₁₉Dividing potential drop, triode BG2 ends, even the external environmental interference light of this moment is scurried into adopter DU, also can't pass triode BG2, again because diode D ₂Buffer action, voltage can not bring influence to the voltage stabilizing point yet; When the electrical pulsing signal of modulation when being low level, emission tube HG conducting, and penetrate the infrared pulse signal, not conducting of triode BG2 this moment to the extraneous width of cloth.If at this moment the infrared pulse signal is received by receiving tube by object reflection back, when opening the door threshold voltage, triode BG2 amplifies this electrical pulsing signal and drives triode BG3 in the electrical pulsing signal amplitude of the collector electrode output of triode BG1.This threshold voltage that opens the door can suppress the interference electrical pulsing signal less than this magnitude of voltage.Triode BG2 only just opens the door when lock-out pulse is low level, and its time only accounted for for 1/20 cycle.The effect of threshold values and synchronous selection pass makes that the interference free performance of circuit is strong especially owing to open the door.Wherein, capacitor C ₆Make power filter, diode D ₄, resistance R ₉With potentiometer W ₁For the base stage of triode BG2 provides an adjustable dc offset voltage, resistance R ₁₃For partial gating provides the voltage of a proper functioning, reference diode DW ₁Then that the voltage after the step-down is stable to guarantee the jamproof effect of gating network.Amplifying the anti-interference network of rectification (6) is by triode BG3, diode D ₅D ₆, resistance R ₁₀, capacitor C ₈C ₉C ₁₁The voltage doubling rectifying circuit and the resistance R that form ₁₄R ₁₅, capacitor C ₁₁The integration circuit that forms is formed jointly.Triode BG ₃The operation point transfer lowlyer, be in the on off state of work basically.Voltage doubling rectifying circuit is a DC level with the positive pulse rectification of triode BG3 output, have only when detected signal (9) in decisive range and during the reflected infrared ray pulse, DC level just can rise to desired value and make time radix word IC 2 upsets of NE555, and eliminate the interference of moment, resistance R ₁₅After detected signal (9) disappears, force capacitor C ₁₁Discharge descends DC level, allows IC2 overturn once more.Resistance R wherein ₁₀R ₁₄Be triode BG ₃Be provided with a suitable quiescent operation point; Capacitor C ₈With triode BG ₂The electrical pulsing signal of output is coupled to triode CG ₃Base stage, resistance R ₁₀Play acceleration here; Capacitor C ₉The positive pulse signal of BG3 output is coupled to commutation diode D ₅D ₆, commutation diode D ₅D ₆Then electrical pulsing signal is carried out rectification.Scmitt trigger circuit (7) is time radix word IC 2 and the resistance R with NE555 ₁₇Form.The 2. pin of its IC2 is with 6. pin in parallel, 5. pin connecting resistance R ₁₇To ground, 4. pin is the set end, is connected to high level.Resistance R ₁₇Make scmitt trigger circuit (7) good fortune Huan gum  ǖ curtain land measure of 30 mu Miao that dies young obstruct the  pump and wave oblique trouble an ancient measure rooms at the sides of or facing the principal rooms lotus root ox) time, the 3. pin of IC2 is a high level, when detected signal (9) enters action range, DC level rises, this moment, the 3. pin upset of IC2 was low level, and scmitt trigger circuit (7) also remains low level; Have only when DC level during less than hysteresis voltage, the 3. pin of IC2 just turns back to high level.Because this characteristic, the detected signal (9) of hand or thing can not influence output state even rock yet among a small circle.The working procedure of executive circuit (8) is: under detected signal (9) effect that does not have hand or thing, reflection infrared sensor (1) does not receive the electrical pulsing signal of modulation pulse generator (3) emission, whole signal conversion control circuit (2) is in static working state, the 3. pin of IC2 is in high level, not adhesive of DC relay J, the solenoid valve XJC that is connected on pipeline terminal can not get 50Hz, 220 volts Ac and the water supply of being failure to actuate; When the detected signal (9) of hand or thing acts on the detection range of reflection infrared sensor (1), whole signal conversion control circuit (2) is in running order, the 3. pin of IC2 becomes low level immediately, the normally opened contact adhesive of DC relay J simultaneously, make solenoid valve XJC obtain 50Hz, 220 volts Ac in the loop of energising and the adhesive spool, open valve, realization comes water automatically.Continued flow resistance D wherein ₉Impel DC relay J to discharge moment and play fast stream mode in outage.LED ₁And LED ₂Show the conducting work and the two states that ends wait, resistance R of this valve respectively ₁₈R ₂₀Then to LED ₁And LED ₂Play metering function respectively.The control circuit required voltage of this valve is through transformer B and full-wave bridge rectifier circuit D by 50Hz, 220 volts Ac ₈～D ₁₁The output dc pulse voltage is through capacitor C ₁₃The mean value of output dc voltage after the filtering is again through three ends fixedly after the integrated regulator IC3 voltage stabilizing, for control circuit provides normal direct-current working volts.Capacitor C ₁₂Be in order further to reduce ripple factor and to prevent that pulse oscillator in the control circuit is to the interference of power supply.The above-mentioned 50Hz that provides for this valve, 220 volts Ac also directly provide working power for solenoid valve XLC simultaneously.

Fig. 3 has reflected that this full-automatic infrared induction comes the inside dependency structure of water valve and each other the present situation that cooperates.As shown in the figure, valve cap (12) is injection molded with the engineering plastics raw material.Its electronic circuit is installed on printed circuit board (PCB) (11) through soldering, and is fixed on valve cap (12) inner chamber tip position by fastening piece.Solenoid valve XJC is the special-purpose overall plastic sealed feed valve (18) of automatic washing machine, its water intake (16) is connected with a water inlet connecting tube (15) that is mounted in valve cap (12) rear wall bottom, and the rubber seal (17) of anti-leak is housed at the mutual end face that connects.The spiral fuse base (13) that the rear wall place that power input line (14) passes valve cap (12) upper end can shield when being provided with power supply short circuit with overload.Valve cap (12) front is furnished with two red, green light emitting diodes (10), i.e. diode (LED) in the circuit ₁And LED ₂, the function that is used for original water valve shows.Reflection infrared sensor (1) is positioned at the water outlet and the positive alternate position of valve cap (12) of inlet valve (18).

Claims (9)

1, a kind of water valve that comes that utilizes the outflow of the automatic pilot line terminal of infrared induction liquid, be made of by being assembled in the valve cap reflection infrared sensor, signal conversion control circuit and executive circuit, it is characterized in that: reflection infrared sensor (1) forms by the electrical pulsing signal through modulation pulse generator (3) modulation that receiving tube DU receives emission tube HG emission; Signal conversion control circuit (2) amplifies anti-interference network (5), the amplification anti-interference network of rectification (6) and scmitt trigger circuit (7) by modulation pulse generator (3), filter amplifier (4), gating and forms; Executive circuit (8) passes through sustained diode ₇, DC relay J and solenoid valve XJC and form.

2, according to claim 1ly come water valve, it is characterized in that: modulation pulse generator (3) is that the time radix word IC 1 with NE555 is the circuit of core.

3, according to claim 1ly come water valve, it is characterized in that: filter amplifier (4) is by triode BG1, capacitor C ₄C ₇And resistance R ₅R ₆R ₇R ₈Form.

4, according to claim 1ly come water valve, it is characterized in that: it is by triode BG2, clamp diode D that gating amplifies anti-interference network (5) ₂D ₃D ₄, reference diode DW ₁, potentiometer W ₁, capacitor C ₆And resistance R ₉R ₁₁R ₁₂R ₁₃R ₁₉Form.

5, according to claim 1ly come water valve, it is characterized in that: amplifying the anti-interference network of rectification (6) is by triode BG3, diode D ₅D ₆, resistance R ₁₀, capacitor C 8C ₉C ₁₁The voltage doubling rectifying circuit and the resistance R that form ₁₄R ₁₅, capacitor C ₁₁The collection parallel circuit that forms is formed jointly.

6, according to claim 1ly come water valve, it is characterized in that: scmitt trigger circuit (7) is time radix word IC 2 and the resistance R with NE555 ₁₇Form.

7, according to claim 1ly come water valve, it is characterized in that: solenoid valve XJC is the special-purpose overall plastic sealed feed valve (18) of automatic washing machine, and its water intake (16) is connected with a water inlet connecting tube (15) that is mounted in valve cap (12) rear wall bottom.

8, describedly come water valve according to claim 1,7, it is characterized in that: the spiral fuse base (13) that the rear wall place that power input line (14) passes valve cap (12) upper end can shield when being provided with power supply short circuit with overload.

9, describedly come water valve according to claim 1,7, it is characterized in that: valve cap (12) front is furnished with two red, green light emitting diodes (10).