CN203532906U - Electronic light-operated water-saving valve - Google Patents

Abstract

The utility model discloses an electronic light-operated water-saving valve which comprises an electromagnetic valve and a control circuit, wherein the control circuit comprises a light dependent resistor R2, a rectifier bridge, a thyristor, an NPN type triode Q1 and an NPN type triode Q2, the input side of the rectifier bridge is connected with a 220V alternating-current power supply through a coil of the electromagnetic valve, the Q1 and the Q2 serve as an amplifying tube and a switch tube respectively, the light dependent resistor is used for sensing the light intensity on site, and the thyristor serves as a switch. The electronic light-operated water-saving valve can achieve water supply stopping at night by means of the light dependent resistor and the thyristor and is easy to operate, and water resources can be effectively saved.

Description

Electronic light-controlled water-saving valve

Technical field

The utility model relates to a kind of electronic light-controlled water-saving valve.

Background technique

Country's water of advocating thriftiness, in a lot of public organizations, as the library of school and teaching building etc. are located, the water flushing tap of Rest Room is in the one day 24 hours states that constantly discharge water, but in fact, in these places, the unmanned use substantially of Rest Room in evening, thereby cause a large amount of wastes of water resources, therefore, be necessary to design the water-saving valve that closes water a kind of evening.

Model utility content

Technical problem to be solved in the utility model is to provide a kind of electronic light-controlled water-saving valve, and this electronic light-controlled water-saving valve is realized the object of closing water evening based on photoresistor and thyristor, easy to implement, effectively saving water resource.

The technical solution of model utility is as follows:

An electronic light-controlled water-saving valve, comprises solenoid valve and control circuit; Control circuit comprises triode Q1 and the Q2 of photoresistor R2, rectifier bridge, thyristor, NPN type;

The input side of rectifier bridge connects alternating current 220V power supply through the coil of solenoid valve; The anode of the outlet side of rectifier bridge is the positive pole that M point connects thyristor; The negative terminal of the outlet side of rectifier bridge is the negative pole that N point connects thyristor; Termination M point of resistance R 8; The other end of resistance R 8 is P point resistance R 1, photoresistor R2 and resistance R 3 ground connection through connecting successively; The tie point of photoresistor R2 and resistance R 3 is the b utmost point that Q point meets triode Q1; The c utmost point of triode Q1 connects P point through resistance R 4; The e utmost point ground connection of triode Q1; Electrochemical capacitor C1 is connected across between the b utmost point and the e utmost point of triode Q1;

The c utmost point of triode Q1 connects the b utmost point of triode Q2 through resistance R 5; The c utmost point of triode Q2 connects P point through resistance R 7; The e utmost point ground connection of triode Q2; Electrochemical capacitor C2 is connected across between the b utmost point and the e utmost point of triode Q2; The b utmost point of triode Q2 connects P point through resistance R 6; The c utmost point of triode Q2 connects the triggering pin of thyristor.

Beneficial effect:

Electronic light-controlled water-saving valve of the present utility model, realizes the object of closing water evening based on photoresistor and thyristor, and Q1 and Q2 are respectively as amplifying tube and switching tube, and photoresistor is used for responding to on-the-spot light intensity, and thyristor is used as switch.Circuit is simple, easy to implement, and effectively saving water resource, is conducive to build a harmonious society.

Accompanying drawing explanation

Fig. 1 is the control circuit schematic diagram of electronic light-controlled water-saving valve;

Embodiment

Below with reference to the drawings and specific embodiments, the utility model is described in further details:

Embodiment 1:

As Fig. 1, a kind of electronic light-controlled water-saving valve, comprises solenoid valve and control circuit; Control circuit comprises triode Q1 and the Q2 of photoresistor R2, rectifier bridge, thyristor, NPN type;

The input side of rectifier bridge connects alternating current 220V power supply through the coil of solenoid valve; The anode of the outlet side of rectifier bridge is the positive pole that M point connects thyristor; The negative terminal of the outlet side of rectifier bridge is the negative pole that N point connects thyristor; Termination M point of resistance R 8; The other end of resistance R 8 is P point resistance R 1, photoresistor R2 and resistance R 3 ground connection through connecting successively; The tie point of photoresistor R2 and resistance R 3 is the b utmost point that Q point meets triode Q1; The c utmost point of triode Q1 connects P point through resistance R 4; The e utmost point ground connection of triode Q1; Electrochemical capacitor C1 is connected across between the b utmost point and the e utmost point of triode Q1;

The c utmost point of triode Q1 connects the b utmost point of triode Q2 through resistance R 5; The c utmost point of triode Q2 connects P point through resistance R 7; The e utmost point ground connection of triode Q2; Electrochemical capacitor C2 is connected across between the b utmost point and the e utmost point of triode Q2; The b utmost point of triode Q2 connects P point through resistance R 6; The c utmost point of triode Q2 connects the triggering pin of thyristor.P point place access DC electrical source (as+5V power supply), be used to the power supply of light current control section.

Working principle explanation:

1 R1 and R3 divider resistance;

2 Q1 are as amplified current pipe;

3 Q2 are as beginning pipe;

During evening, the upper induction of R2 is less than light source, and the resistance value of R2 becomes ambassador Q1 amplified current Tube current and diminishes.The C pole tension of Q1 rises, and makes Q2 base voltage increase, Q2 conducting after Q2 base voltage rises, and the C utmost point of Q2 cannot be exported trigger signal and make controllable silicon (being thyristor) conducting, and not charged on solenoid valve, water tap is in closed condition.

During daytime, sense light source on R2, the resistance value of R2 diminishes and makes Q1 amplified current Tube current become large.The C pole tension of Q1 declines, and makes Q2 cut-off, thereby Q2 output trigger signal is opened thyristor, thereby impels the direct short circuit of rectifier bridge outlet side to make solenoid valve charged, the tap of fetching boiling water.

Claims (1)

1. an electronic light-controlled water-saving valve, is characterized in that, comprises solenoid valve and control circuit; Control circuit comprises triode Q1 and the Q2 of photoresistor R2, rectifier bridge, thyristor, NPN type;

The input side of rectifier bridge connects alternating current 220V power supply through the coil of solenoid valve; The anode of the outlet side of rectifier bridge is the positive pole that M point connects thyristor; The negative terminal of the outlet side of rectifier bridge is the negative pole that N point connects thyristor; Termination M point of resistance R 8; The other end of resistance R 8 is P point resistance R 1, photoresistor R2 and resistance R 3 ground connection through connecting successively; The tie point of photoresistor R2 and resistance R 3 is the b utmost point that Q point meets triode Q1; The c utmost point of triode Q1 connects P point through resistance R 4; The e utmost point ground connection of triode Q1; Electrochemical capacitor C1 is connected across between the b utmost point and the e utmost point of triode Q1;

The c utmost point of triode Q1 connects the b utmost point of triode Q2 through resistance R 5; The c utmost point of triode Q2 connects P point through resistance R 7; The e utmost point ground connection of triode Q2; Electrochemical capacitor C2 is connected across between the b utmost point and the e utmost point of triode Q2; The b utmost point of triode Q2 connects P point through resistance R 6; The c utmost point of triode Q2 connects the triggering pin of thyristor.

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