CN2237161Y

CN2237161Y - Switch automatically controlled by water

Info

Publication number: CN2237161Y
Application number: CN 95219358
Authority: CN
Inventors: 许正航; 沈国印
Original assignee: CHENGDE CITY RADIO ELEMENT FACTORY
Current assignee: CHENGDE CITY RADIO ELEMENT FACTORY
Priority date: 1995-08-22
Filing date: 1995-08-22
Publication date: 1996-10-09
Anticipated expiration: 2005-08-22

Abstract

The utility model provides a water automatic control switch. The utility model is composed of a heat-release infrared sensor, an infrared sensing signal processor, a frequency selective network, a delay circuit, a drive circuit, an electromagnetic valve and a power supply, wherein, the frequency selective network is connected between a fin 16 and a fin 13 of the infrared sensing signal processor, and the delay circuit is connected between a fin 2 of the infrared sensing signal processor and the drive circuit. As the utility model has no need of people hands to operate valves, the utility model overcomes permanent water flowing phenomenon and prevents cross infection of bacteria. The utility model can be used for water pipes of water washing pools of public places of dining rooms, hotels, hospitals, etc., and can also be arranged on showers.

Description

The water automatic control switch

The utility model relates to a kind of water automatic control switch.

At present, the fire hose folder that public places such as hotel, hospital and restaurant use all is to adopt the manually switch of control, be easy to generate races, droplet, leakage and perennial draingage phenomenon, both wasted the water source, unhygienic again, be easy to generate bacterial cross-infection.

The purpose of this utility model is exactly will provide a kind of and can overcome the perennial draingage phenomenon, prevent that cross infection from not needing manually-operable, water automatic control switch easy to use.

Water automatic control switch of the present utility model is released infrared senor by heat, control circuit, drive circuit, solenoid valve and power supply are formed, the electrical signal that sensor produces amplifies through control circuit identification, output DC is flat, send drive circuit, start solenoid valve work, control circuit is by including amplifier, the infrared sensor signal processor of comparator and state controller, frequency-selective network and delay circuit are formed, 14 pin of infrared sensor signal processor are amplifier input terminal, the electrical signal that input pickup produces, 16 pin are the output terminal of amplifier, 13 pin are the input end of comparator, the output terminal of 2 pin state controllers, the volume network of choosing is connected between 16 pin and 13 pin of infrared sensor signal processor, and delay circuit is connected between the input end of 2 pin of infrared sensor signal processor and drive circuit.

Frequency-selective network and delay circuit are by the interior vast device IC of two computings that is contained in the intergrated circuit LF351 ₁And IC ₃Form IC ₁With R ₅, C ₂Form frequency-selective network, R ₅, C ₂Be connected to IC after the parallel connection ₁Output terminal and end of oppisite phase between, IC ₁In-phase end and infrared sensor signal processor IC ₂16 pin link IC ₁The electrical signal of output is sent into IC ₂13 pin, resistance R ₃, R ₄Be connected between power supply and the ground wire its contact and IC after the series connection ₁End of oppisite phase link; IC ₃With capacitor C ₉Form delay circuit, C ₉Be connected to IC ₃Output terminal and end of oppisite phase between, IC ₃In-phase end and IC ₂2 pin link resistance R ₁₂, R ₁₃Be connected between power supply and the ground wire its contact and IC ₃End of oppisite phase link IC ₃The DC level of output is sent into drive circuit, drives solenoid valve work.

The water automatic control switch that adopts technique scheme to make, very responsive to the thermal infrared ripple that human body sends, when human body entered the control zone, sensor promptly sent faint electrical signal, after amplifying processing, output DC is flat, send drive circuit, starts solenoid valve, water valve is opened automatically, water flows out automatically, very important person continuous action in the control zone, and water valve just often leaves, when the people leaves the control zone certain hour, water valve cuts out, and does not need to use the handling valve, has overcome the perennial draingage phenomenon, prevented the cross infection of bacterium, owing to increased frequency-selective network and delay circuit in the circuit, improved antijamming capability, can suppress effectively to disturb, prevent misoperation, can be installed in the dining room, the restaurant, on the washbasin water pipe of public places such as hospital, also can be installed on the shower, can save a large amount of waters.

The utility model is described in further detail below in conjunction with accompanying drawing.

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

Fig. 2 is circuit theory diagrams of the present utility model.

The utility model is mainly released infrared senor HR, infrared sensor signal processor IC by heat ₂, include two operational amplifier IC ₁And IC ₃Intergrated circuit LF351, compound transistor BG and low-voltage solenoid valve FX form.The Ac of 220V by intergrated circuit 7805 voltage stabilizings, provides power supply to circuit, infrared sensor signal processor IC after transformation, rectification, filtering ₂Adopt the B1SS00O1 type, it have to signal amplify, comparison, State Control, output DC equality function.

The ultra-weak electronic signal that HR produces is sent into IC by 2 pin of HR ₂14 pin, after internal amplifier amplified step by step, by 16 pin output, 15 pin were the end of oppisite phase of internal amplifier, are connected to parallel resistor R between 16 pin, 15 pin ₇, capacitor C ₅, R ₈, C ₆Be connected between 15 pin and the ground wire, signal carried out filtering amplify, for further suppressing to prevent misoperation, at IC in disturbing ₂Be connected to frequency-selective network between internal amplifier and the comparator, signal is amplified, filtering High-frequency Interference composition.Frequency-selective network is by IC ₁R with 10K ₅, 100nF C ₂Form R ₅, C ₂Be connected to IC after the parallel connection ₁Output terminal 1 and end of oppisite phase 2 between, in-phase end 3 is by coupling capacitance and IC ₂16 pin link IC ₁Output terminal 1 by coupling capacitance C ₁₀, build-out resistor R ₁₅With IC ₂13 pin link, connect the input end of inner amplifier comparator, the R of 10K ₃, R ₄Be connected between power supply and the ground wire its contact and IC ₁End of oppisite phase link, be IC ₁Provide bias current, at IC ₂13 pin, 12 pin between be connected to parallel resistor R ₆, capacitor C ₃, to signal further amplify, filtering.

At IC ₂3 pin, 4 pin between be connected to the variable resistor R of 10K ₁₁, capacitor C ₈Be connected to R ₁₁And between the ground wire, R ₁₁, C ₈Output level is delayed time,, use inconvenience, so at IC because regulation range is little ₂Output terminal 2 pin and the drive circuit formed of compound transistor BG between be connected to delay circuit, to increase delay time.Delay circuit is by IC ₃, and the C of 22u ₉Form C ₉Be connected to IC ₃Output terminal 7 and end of oppisite phase 6 between, IC ₂The DC level of 2 pin output through diode D ₁Send IC ₃In-phase end 5, the R of 10K ₁₂, R ₁₃Be connected between power supply and the ground wire its contact and IC ₃End of oppisite phase link, 4 pin of LF351 and 8 pin link with power supply and ground wire respectively.Work as IC ₂2 pin output high level the time, IC ₃The output terminal high level be higher than end of oppisite phase, work as IC ₂2 pin output when becoming low level, IC ₃Output low level is because C ₉The voltage on both sides can not suddenly change, and still keeps a period of time high level, realizes time delays.IC ₃The DC level of output is through current-limiting resistance R ₁₄Send into the base stage of BG, low-voltage solenoid valve FX is connected between the collector electrode of power supply and BG, diode D ₂Reversal connection is on the both sides of FX.IC ₂5,6 pin between be connected to resistance R ₁₀, pass through capacitor C ₇Ground connection, R ₁₀, C ₇Form and block time-delay, at IC ₂Interior no longer acknowledge(ment) signal of a period of time behind the acknowledge(ment) signal disturbs to exempt.IC ₂1 pin, 8 pin, 9 pin, 11 pin connect power supply, 7 pin ground connection, 10 pin pass through R ₉Ground connection is internal bias resistance, and 3 pin of HR are by divider resistance R ₁Link with power supply, 3 pin are by filter capacitor C ₇Ground connection, 1 pin ground connection.

Claims

1, a kind ofly release infrared senor by heat, control circuit, drive circuit, the water automatic control switch that solenoid valve and power supply are formed, the electrical signal that sensor produces amplifies through control circuit identification, send drive circuit, start solenoid valve work, it is characterized in that: control circuit is by including amplifier, the infrared sensor signal processor of comparator and state controller, frequency-selective network and delay circuit are formed, 14 pin of infrared sensor signal processor are amplifier input terminal, the electrical signal that input pickup produces, 16 pin are the output terminal of amplifier, 13 pin are the input end of comparator, 2 pin are the output terminal of state controller, frequency-selective network is connected between 16 pin and 13 pin of infrared sensor signal processor, and delay circuit is connected between the input end of 2 pin of infrared sensor signal processor and drive circuit.

2, water automatic control switch according to claim 1 is characterized in that: frequency-selective network and delay circuit are by interior two operational amplifier IC that are contained in the intergrated circuit LF351 ₁And IC ₃Form IC ₁With resistance R ₅, capacitor C ₂Form frequency-selective network, R ₅, C ₂Be connected to IC after the parallel connection ₁Output terminal and end of oppisite phase between, IC ₁In-phase end and IC ₂16 pin link IC ₁The electrical signal of output is sent into IC ₂13 pin, resistance R ₃, R ₄Be connected between power supply and the ground wire its contact and IC ₁End of oppisite phase link; IC ₃With capacitor C ₉Form delay circuit, C ₉Be connected to IC ₃End of oppisite phase and output terminal between, IC ₃In-phase end and IC ₂2 pin link resistance R ₁₂, R ₁₃Be connected between power supply and the ground wire its contact and IC after the series connection ₃End of oppisite phase link IC ₃The DC level of output is sent into drive circuit.