CN2141623Y

CN2141623Y - Photo controlled time delay switch

Info

Publication number: CN2141623Y
Application number: CN 92238021
Authority: CN
Inventors: 陈学理
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-08
Filing date: 1992-10-08
Publication date: 1993-09-01
Anticipated expiration: 2002-10-08

Abstract

The utility model relates to an optical control delay switch, which utilizes the brightness of natural light to automatically switch on and delayedly switch off the power supplies of neon boards, advertisement lamp boxes and illuminating lamps in public places, etc. The optical control delay switch is composed of a power supply circuit, an optical control circuit, a delay circuit and an executive circuit. The delay circuit is connected between the optical control circuit and the executive circuit, and the executive circuit adopts an LM555 integrated package. The utility model has the advantages of high control sensitivity, low cost, long service life and wide range of application. The delay time of the delay switch can be automatically adjusted according to requirement so as to save electric energy.

Description

Photo controlled time delay switch

The utility model relates to that a kind of shading value of utilizing natural daylight is connected automatically and the light-operated delay switch of power supplys such as time-delay closing neon light, advertising lamp box, public place illuminating lamp, to realize unattended management.

Existing photoelectric control switch generally is divided into two classes: a kind of is manually to set light-operated switch, they need press starting button by the people in use, switch just can work, and another kind of be automatic light-operated on-off switch, this switch was connected at night, could disconnect after daybreak, though this switch has been realized unattended management, but many light fixtures are often arranged, example: the illuminating lamp of neon light, advertising lamp box, public place etc.Their only need put a few hours at night, and when the dead of night can close the power supply of lamp, yet above-mentioned switch all can not play this effect.

The purpose of this utility model is to provide a kind of automatic light-operated time-delay on-off switch, and it can not only connect the power supply of light fixture automatically at night, and closes lamp power automatically after a few hours of can also delaying time as required.

Light-operated delay switch provided by the utility model is made up of power circuit, light-operated circuit, executive circuit, and this switch mainly is to have set up delay circuit between light-operated circuit and executive circuit, and the input of this delay circuit is connected on the resistance R of light-operated circuit ₃On, the output of delay circuit links to each other with the input of executive circuit.

Describe concrete structure of the present utility model and principle in detail below in conjunction with accompanying drawing.

Fig. 1---be block diagram of the present utility model

Fig. 2---be electrical schematic diagram of the present utility model

Fig. 3---be first kind of embodiment schematic diagram of Fig. 2

Fig. 4---be second kind of embodiment schematic diagram of Fig. 2

The third embodiment schematic diagram of Fig. 5---Fig. 2

As shown in Figure 1 and Figure 2, power circuit of the present utility model comprises full-bridge QL, voltage-stabiliser tube DW, capacitor C ₁, C ₂, resistance R ₁, the 220V alternating current is through C ₁Step-down, full-bridge QL rectification, capacitor C ₂Filtering, DW ₁The operating voltage of exporting after the voltage stabilizing is to supply with light-operated circuit (2), delay circuit (3) and executive circuit (4) work, and light-operated circuit (2) is by triode V ₁, photo resistance RG, resistance R ₂, R ₃Form, delay circuit (3) comprises triode V ₂, V ₃, diode D ₅, resistance R ₅, R ₆And capacitor C ₃When daytime (when illumination is arranged), photo resistance RG is low resistance, impels base stage to be connected in triode V on the photo resistance RG ₁Conducting, V ₁Output signal through resistance R ₃Be coupled to triode V ₂Base stage, make V ₂Be in cut-off state, and electric current is connected in V by negative electrode ₂Collector electrode, anode and capacitor C ₃The diode D that links to each other of positive pole ₅To C ₃Charging is connected in diode D simultaneously in this ₅V on the anode ₃Conducting, its output signal is through resistance R ₆Send into the triode V of executive circuit ₄Base stage, executive circuit is by triode V ₄, integrated package LM555, be connected in integrated package LM555(3) relay J on the pin ₁, resistance R ₇, diode D ₆Form relay J ₁The contact be connected between load (bulb, neon light) and the power supply.Along with V ₃Conducting V ₄Also conducting, V ins succession ₄LM555 2. on the collector electrode, 6. pin is low level, because V ₁Conducting, with V ₁The 4. pin of the continuous LM555 of collector electrode is in " resetting " state, thereby the 3. pin of LM555 integrated package is the output of low level no signal, relay J ₁Not adhesive, be failure to actuate in its contact, and load is not thrown light on because of outage.When the curtain of night comes (during no optical illumination), the resistance of photo resistance RG increases, and impels V ₁End V ₂Conducting, the 4. pin " set " of LM555 integrated package, its 3. pin become high level by low level, make relay J ₁Get electric adhesive, its closing of contact, the power supply of load is switched on, and has lighted neon light, and advertising lamp boxs etc. are because at V ₂Collector electrode and V ₃The diode D that connects of base stage ₅The buffer action that is risen is stored in C ₃Electricity can only pass through V ₃B, e extremely slowly discharge, through after the some hrs discharge, triode V ₄End, be connected on V ₄LM555 integrated package on the collector electrode is 2., 6. pin is high level, the upset of LM555 integrated package, and its output 3. pin also transfers low level to by high level, J ₁Because of dead electricity discharges, its contact disconnects, and the power supply of load also disconnects, thereby has realized the purpose of time delayed turn-off load power source.

The utility model is if only being used to control street lamp etc. connects night, the altar lamp of closing daytime, and the cancellation delay circuit can reach.

For the length of the delay time that can change neon light, advertising lamp, public place illuminating lamp etc., the utility model is at R ₅And be connected to variable resistor R between the ground _P(see figure 3).

As a kind of conversion (see figure 4) of this example, this device is with electromagnetic relay J ₂Be connected in triode V ₂Collector electrode and working power between, be serially connected between AC power and the load after its contact and the buck diode parallel connection, certainly also can directly bidirectional triode thyristor directly be serially connected between AC power and the load, step-down power supply behind the setting-up time, to reach saves energy, prolong the light fixture effect in useful life.

The utility model is arranged on open-air neon light, advertisement cabinet etc. in order also to protect effectively on rainy day; present embodiment is connected in parallel on humidity sensor P the two ends (see figure 5) of photo resistance RG; can realize disconnecting daytime, connect night, the effect of raining and disconnecting.

The utility model is compared with existing light-operated switch has following advantage: control highly sensitive, the time-delay automatically shut down load power source, saves energy, safe and reliable, this switch cost is low, the life-span is long, purposes is comparatively extensive.

Claims

1, a kind of light-operated delay switch of being made up of power circuit (1), light-operated circuit (2), executive circuit (4), wherein power circuit (1) comprises full-bridge QL, voltage-stabiliser tube DW ₁, capacitor C ₁, C ₂, resistance R ₁Light-operated circuit (2) comprises triode V ₁, photo resistance RG, resistance R ₂, R ₃, it is characterized in that also being provided with delay circuit (3), the input and the resistance R of delay circuit (3) ₃Link to each other, its output is connected on the input of executive circuit (4).

2, light-operated delay switch according to claim 1 is characterized in that executive circuit (4) comprises triode V ₄, integrated package LM555, electromagnetic relay J ₁, resistance R ₇, diode D ₆, be connected to relay J at output (3) pin of LM555 integrated package ₁, with J ₁The contact be connected between power supply and the load.

3, light-operated delay switch according to claim 2 is characterized in that delay circuit (3) is by triode V ₂, V ₃, diode D ₅, resistance R ₅, R ₆Form triode V ₂Base stage and resistance R ₃Link to each other resistance R ₆Be connected in triode V ₄Base stage on.

4, light-operated delay switch according to claim 3 is characterized in that variable resistor R _PBe serially connected in resistance R ₅And between the ground.

5, according to claim 1 or 2 or 3 or 4 described light-operated delay switchs, it is characterized in that electromagnetic relay J ₂Be connected in triode V ₂Between collector electrode and the working power, its contact be serially connected between AC power and the load after buck diode is in parallel.

6, light-operated delay switch according to claim 5 is characterized in that the humidity sensor element is in parallel with photo resistance RG.