CN2038179U

CN2038179U - Infrared automatic control tap

Info

Publication number: CN2038179U
Application number: CN 88219007
Authority: CN
Inventors: 王公瑞; 徐世荣; 鲁广洲; 王力工
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 1988-11-03
Filing date: 1988-11-03
Publication date: 1989-05-24

Abstract

The utility model provides a new style of infrared automatic control tap, which is composed of an infrared sensing switch and a double membrane type closing electromagnetic valve, wherein, the structural design of the double membrane type closing electrovalve is novel, enable controlled running water not to directly contact the moving iron core of the electromagnet and ensure the electromagnetic valve can not rust and be ineffective. Besides, the infrared sensing switch adopted by the utility model has the advantages of long service life, high precision, high speed, far acceptance range, convenient regulation and good anti-light disturbance performance. The utility model has the advantages of simple structure, small size, low cost, convenient maintenance, low pressure and safety, and is accompanied by hand-operating mechanism and can be widely used in the field of daily life.

Description

Infrared automatic control tap

The utility model belongs to the automatic faucet class.

Automatic faucet partly is made up of control circuit and solenoid valve two.At present, the existing in the international market commodity selling of automatic faucet has also begun small lot batch manufacture at home.But, existing automatic faucet, there are some significant drawback in one of the parts that it is main solenoid valve, directly contact as all direct and controlled current of the moving iron core of valve port piston, spring and the electromagnet of solenoid valve, so in case use, produce corrosion soon, thereby cause incessantly water of piston envelope, perhaps the moving iron core of electromagnet is stuck; Corrosion product pollutes water again in addition, influences water quality.The solenoid valve that promptly uses stainless steel to make is also kept away the etch damage of unavoidable water to the moving iron core of electromagnet.In addition, the regulation range of the decisive range of the control sensor of existing automatic faucet is very limited, and this has just greatly limited its use occasion.

The utility model is intended to develop a kind of novel structure, and the moving iron core of controlled current and electromagnet is not directly contacted, and guarantees that solenoid valve did not lose efficacy because of corrosion; And control is reliable, interference resistance is strong, response is fast, and control action distance adjustment scope is big, and whole device volume is little, the infrared light control automatic faucet that cost is low.

The present invention realizes with following proposal:

The utility model infrared light control automatic faucet is made up of infrared sensor switch (comprising: infrared emission tube 1, infrared receiver tube 2, modulation pulse generator 3, demodulator amplifier 4, voltage doubling rectifying circuit and anti-interference network 5, driver 6, power supply 8) and solenoid valve 7.Its theory diagram as shown in Figure 1.As long as object is positioned at the place ahead of the infrared senor of being made up of infrared emission tube 1 and infrared receiver tube 2, automatic faucet is just opened automatically, and tap water just flows out through automatic faucet.Otherwise after object was removed, automatic faucet was just closed automatically, stopped to supply water.

Its technology contents is described in detail in detail below:

Infrared emission tube 1 and the infrared receiver tube 2 common infrared senors of forming infrared sensor switch.Wherein, infrared emission tube 1 is selected small-power gallium arsenide infrarede emitting diode 5GLB etc. for use, and its extension shape spectral line scope is between wavelength 9100～9400 dusts, and the pipe head has the epoxy lens to make the ray divergence angle less than 20 ° directional property preferably be arranged.Infrared receiver tube 2 is selected phototransistor 3DU5C or 3DU32C etc. for use, its typical spectral response wavelength is 5000～10000 dusts, overlaps with emission tube spectral line scope, and its head also has the epoxy lens to assemble by object radiation reflected light, make the raying angle be not more than 20 °, help anti-interference.Sensor is installed in the bottom (also can be installed in other position according to different purposes) of solenoid valve 7 with infrared light pipe fixed tray 21 and screw 22 after insulation is handled, as shown in Figure 2.At transmitting terminal, modulation pulse generator 3 is used for producing and outwards giving off modulated infrared pulse, at receiving terminal when external object enters action range, the infrared pulse that is sent by infrared emission tube 1 reflects from body surface and enters infrared receiver tube 2, change electrical pulsing signal into through light sensitive effect, after this signal is sent into demodulator amplifier 4 demodulation and amplification, become the electrical pulsing signal of 1000HZ, this signal enters voltage doubling rectifying circuit and anti-interference network 5, behind voltage multiplying rectifier, become direct current signal, in order to trigger driver 6, make solenoid valve 7 actions.Wherein owing to adopted anti-interference network, just make have only when object at certain distance internal reflection infrared pulse, could drive solenoid valve, this has just been avoided the interference of the interior any object of surrounding environment to circuit.Otherwise after object was removed, the infrared rays that is sent by infrared light-emitting diode 1 just can not reflect, and infrared receiver tube 2 does not just have the output of 1000HZ electrical pulse, thereby driver 6 disconnects the power supply of solenoid valve 7 automatically, and automatic faucet is closed immediately.

Except infrared emission tube 1 and infrared receiver tube 2 were installed on the infrared light pipe fixed tray 21 of solenoid valve 7 bottoms, the component of whole infrared sensor switch was installed concentratedly in a box.

Solenoid valve 7 is that the present utility model people " dual-diaphragm type normally-closed solenoid valve " invented is in the technical specific embodiments of automatic faucet, it is by low pressure (24 volts) DC electromagnet (comprising: spring 11, electromagnet coil 12, moving iron core 13), valve body (comprising: electromagnet fixed tray 14, pilot valve elastic membrane 15, upper valve body 30, main valve elastic film 18, main valve body 34), manual operating device (comprising: knob 9, moving iron core traction cap 26, electromagnet top cover 25, moving iron core draw-bar 10) is formed, as shown in Figure 2.

The low-voltage direct electromagnet is that well-known structure forms, and unique difference is: there is a female thread at the center, upper end of moving iron core 13, matches in order to the external screw thread with moving iron core draw-bar 10.Electromagnet is fixed on the electromagnet fixed tray 14 coaxially.

The moving iron core traction cap 26 of manual operating device is a cup-shaped, and bottom center has a through hole, and its upper end is fixed on the knob with screw 23, and its side surface is an external screw thread, with the female thread of electromagnet top cover 25; Moving iron core draw-bar 10 passes the aperture of moving iron core traction cap 26 bottoms and the center hole of electromagnet upper end, is tightened on the moving iron core 13.Whole manual operating device is by only drawing two among 3 screw 24(of electromagnet top cover 25 usefulness figure) be fixed on coaxially on the electromagnet.

The structure of each element of valve body is as follows: the center of electromagnet fixed tray 14 is a through hole, this hole is divided into up-thin-low-thick two sections, the lower end of moving iron core 13 is passed and is pressed in therebetween on the pilot valve elastic membrane 15, pilot valve elastic membrane 15 is a rubber thin discs, is installed between electromagnet fixed tray 14 and the upper valve body 30; On this film except 4 link among the screw 27(figure only draw two) via hole do not have other through hole.Have an axisymmetric annular groove in the middle of the top of upper valve body 30, be called pressure relief groove 16; It is cylindrical to have an axisymmetric in the middle of the bottom of upper valve body 30 , be called Seal cage 29.Also have pressure relief vent 23 and throttle orifice 17 in upper valve body 30, wherein the two-port of upper valve body pressure relief vent 28 is led to the lower surface of pressure relief groove 16 and upper valve body 30 respectively; The opposite side in upper valve body 30 opened in 17 one-tenth " fourth " fonts of upper valve body throttle orifice, and wherein one section is the through hole along the axis of upper valve body 30, and another section elder generation stretches out along radial direction, meets at right angles then to bend towards the lower surface of upper valve body 30 and go out.Main valve elastic film 18 is a rubber thin discs, is installed between upper valve body 30 and the main valve body 34; Except that the via hole of 4 binding screws 27, other has 2 apertures on this film, and upper valve body pressure relief vent 26 and throttle orifice 17 and main valve body pressure relief vent 33 and throttle orifice 19 join by these two aperture correspondences respectively.Main valve elastic film 18 central authorities also are embedded with a rivet 32, in order to increase the middle rigidity partly of this film.The top of main valve body 34 has an axisymmetric annular groove, is called main valve annular groove 31.On main valve body 34, also have inlet channel 20 and water outlet 35.Wherein water outlet 35 is the through hole along main valve body 34 axis; The inducer of inlet channel 20 along main valve body 34 radially, its inner end bends straight up with main valve annular groove 31 and communicates.In addition, in main valve body 34, also be drilled with pressure relief vent 33 and throttle orifice 19.Wherein, main valve body throttle orifice 19 is from the upper surface of main valve body 34, communicate along being directed downwards of parallel to an axis with inlet channel 20, main valve body pressure relief vent 33 is positioned at opposite side, its vertical section starts from the upper surface of main valve body 34, along with being directed downwards of parallel to an axis, quarter bend is converted into horizontal segment radially then, and communicates with water outlet 35.The upper end open position of main valve body pressure relief vent 33 and throttle orifice 19, corresponding with the exit position, lower end of upper valve body pressure relief vent 28 and throttle orifice 17 respectively.

The compound mode of valve is: top and pilot valve elastic membrane 15 by electromagnet fixed tray 14, upper valve body 30 form pilot valve jointly; Bottom, main valve elastic film 18 and main valve body 34 by upper valve body 30 are formed main valve jointly.Driving valve is in proper order, by the open and close of the power on/off of electromagnet control pilot valve, again by the open and close of the open and close decision main valve of pilot valve.During assembling, electromagnet fixed tray 14, pilot valve elastic membrane 15, upper valve body 30, main valve elastic film 18 and main valve body 34 are tightened together coaxially with the connection screw 27 of 4 position symmetries.In the valve that assembles, upper valve body pressure relief vent 28 and throttle orifice 17 will communicate with main valve body pressure relief vent 33 and throttle orifice 19 respectively, must not deaden.Its profile of the valve that assembles is given and is designed to the axisymmetric surface of revolution earlier.In addition, be processed with female thread in the import of inlet channel 20, in order to automatic faucet is attached on the running water pipe.

The working principle of solenoid valve 7 is: when electromagnet is not switched on, because the acting in conjunction of the gravity of spring 11 and moving iron core 13, make pilot valve elastic membrane 15 seal uppermost that opening of throttle orifice 17, thereby pilot valve is in closed state.This moment, tap water was full of in the cavity up and down (being Seal cage 29 and main valve annular groove 31) of main valve elastic film 18 through inlet channel 20 and main valve body throttle orifice 19, upper valve body throttle orifice 17.Because the area design of Seal cage 29 must be more much bigger than the area of main valve annular groove 31, so, main valve export act on the main valve elastic film 18 on be in closed condition under the effect of launching stress difference.So when not switching on, solenoid valve 7 is in normally off.When electromagnet is switched on, the magnetic field magnetic force that coil 12 produces will move iron core 13 and pick up, and no longer push down pilot valve elastic membrane 15.At this moment, under the effect of upper valve body throttle orifice 17 internal water pressures, pilot valve elastic membrane 15 is upwards backed down, thereby pilot valve is opened, making the upper valve body throttle orifice is low voltage terminal through pressure relief groove 16, upper valve body pressure relief vent 28, main valve body pressure relief vent 33 with water outlet 35() communicate, and make the pressure on main valve elastic film 18 tops be reduced to barometric pressure no better than rapidly.Under the effect of the water pressure of main valve elastic film 18 bottoms (being in the main valve annular groove 31), upwards back down main valve elastic film 18, with main valve open, form path, water is just through water outlet 35 outflows.When the power supply of tripping magnet, magnetic force disappears, and moving iron core 13 is closed pilot valve, thereby caused main valve also to be closed by the elastic force of spring 11 and the gravity reduction of itself.

Have a power failure if meet, available manual operating device is opened automatic faucet, as long as with the moving 9 moving iron core traction caps 26 of knob of hand-screw will be along screw thread with respect to electromagnet top cover 25 towards the 3-4 millimeter that axially moves up, moving iron core draw-bar 10 of traction simultaneously and the moving up vertically 2-3 millimeter of iron core 13, thereby make iron core 13 no longer compress pilot valve elastic membrane 15, under the effect of throttle orifice internal water pressure, pilot valve has just been opened like this, thereby main valve is also and then opened.With knob 9 cycle original positions, moving iron core 13 will be pressed on the pilot valve elastic membrane 15 again, thereby pilot valve is closed, and and then main valve has also just been closed automatically.

The utility model infrared light control automatic faucet has following advantage:

(1), the infrared sensor switch that adopts of this automatic faucet has long, advantage such as precision is high, speed of response is fast, decisive range is far away, easy, the anti-light jamming performance of decisive range adjusting is good, and application maintenance is easy of life-span.

(2), the dual-diaphragm type normally-closed solenoid valve that adopts of this automatic faucet, its novel structure, electromagnet does not contact with flowing medium, can not produce corrosion; Have the life-span long, to water nonpollution, and simple and convenient for maintenance.And this solenoid valve volume is little, in light weight, manufacturing is easy, and cost is low.

(3), this automatic faucet adopts low-voltage DC to drive solenoid valve, work safety, can exempt the electric shock injury accident.

(4), this automatic faucet is with manual-operating mechanism, have a power failure or still can use during power failure when running into.

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

Accompanying drawing 1 is the principle schematic of the utility model " infrared light control automatic faucet ".Wherein, 1 is infrared emission tube; 2 is infrared receiver tube; 3 is modulation pulse generator; 4 is demodulator amplifier; 5 is voltage doubling rectifying circuit and anti-interference network; 6 is driver; 7 is solenoid valve; 8 is power supply.

Accompanying drawing 2 is the structural representation of solenoid valve, and wherein, 9 is knob; 10 are moving iron core draw-bar; 11 is spring; 12 is coil; 13 are moving iron core; 14 is the electromagnet fixed tray; 15 is the pilot valve elastic membrane; 16 is pressure relief groove; 17 is the upper valve body throttle orifice; 18 is the main valve elastic film; 19 is the main valve body throttle orifice; 20 is inlet channel; 21 is infrared light pipe fixed tray; 22 is screw; 23 is screw; 24 is screw; 25 is the electromagnet top cover; 26 are moving iron core traction cap; 27 for connecting screw; 28 is the upper valve body pressure relief vent; 29 is Seal cage; 30 is upper valve body; 31 is the main valve annular groove; 32 is rivet; 33 is the main valve body pressure relief vent; 34 is main valve body; 35 is water outlet.

Claims

1, a kind of infrared light control automatic faucet of forming by infrared sensor switch and solenoid valve, it is characterized in that infrared sensor switch is made of infrared emission tube, infrared receiver tube, modulation pulse generator, demodulator amplifier, anti-interference network, driver, power supply, solenoid valve by electromagnet, electromagnet fixed tray, pilot valve elastic membrane, upper valve body, main valve elastic film, main valve body, infrared light pipe fixed tray, and manual operating device constitute.

2, a kind of automatic faucet as claimed in claim 1 is characterized in that the upper valve body top of solenoid valve has a symmetrical annular groove, and the upper valve body bottom has the cylindrical nest of an axisymmetric; Upper part of the main valve body has an axisymmetric annular groove, main valve body one side radially has inlet channel, meet at right angles the upwards bending and communicate with the axisymmetric annular groove of upper part of the main valve body of inlet channel inner end, the central authorities of main valve body have a water outlet that connects the main valve body upper and lower surface vertically.Its feature is that also the upper valve body of solenoid valve and main valve body inside all have throttle orifice and pressure relief vent.

3, a kind of automatic faucet as claimed in claim 2 is characterized in that on the infrared emission tube of infrared sensor switch and the infrared light pipe fixed tray that infrared receiver tube is installed in the solenoid valve lower end.