CN2162036Y

CN2162036Y - Electronic timer for power supply

Info

Publication number: CN2162036Y
Application number: CN 93208240
Authority: CN
Inventors: 林瑞光; 于非
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 1993-03-27
Filing date: 1993-03-27
Publication date: 1994-04-13
Anticipated expiration: 2003-03-27

Abstract

An electronic timer for power supply relates to a device for turning on and off the power supply at a definite time. The device makes use of a bistable trigger circuit to pass the signals of timing on and off from a signal generator or the on and off signals directly from a hand knob to a load switch which exercises the on and off of the power supply. This device not only can be a single-phase timer which only is equipped with the function of timing on or timing off but also can be a two-way timer which can turn on the power supply at a definite time while at another time turn off the power supply. The utility model has the advantages of safety, reliability and good stability, so that this timer can be widely used for the places like industrial and mining establishments, families and so on where any electric equipment with timing control for the on and off of the power supply are used.

Description

Electronic timer for power supply

The utility model relates to the device that a kind of timing controlled power consumption equipment turns on and off power supply.

Present widely used common power socket, no timing function, can not carry out regularly logical to power consumption equipment, outage control, and existing clock timer, the electronic watch timer, it is logical, disconnected control is influenced greatly by line voltage, in case meet power failure, just be difficult to continue to keep timing function, so anti-interference and deal with the temporary interruption ability, and has only unidirectional timing controlled function, promptly can not be set in certain energized constantly, and cut off the electricity supply constantly, in addition at another, small-signal control circuit in the timer is logical with the enforcement power supply, disconnected load switching circuit is introduced by a power supply altogether, has directly influenced its safe and reliable operation.

In view of above-mentioned, task of the present utility model provides and a kind ofly deals with that temporary interruption, antijamming capability are strong, good stability, unidirectional Power supply timer safe and reliable to operation and also have the bi-directional power timer of two-way timing function simultaneously.

The key of the utility model technical solution is to adopt bistable trigger-action circuit in the control circuit that opens and shuts off power supply of bi-directional power timer or unidirectional Power supply timer, open or regularly close signal by its timing of automatic signal generator in the future and be defeated by that to exercise power supply logical, disconnected load switch, make power consumption equipment energized or cut off the electricity supply, when a timing generator only is set in the control circuit, it then is unidirectional Power supply timer, when two timing generators are set in the circuit, then for having two-way timing function, can set energized constantly at certain, and set the bi-directional power timer of constantly cutting off the electricity supply at another, and control circuit is powered separately by battery.

Because bistable trigger-action circuit has memory function, so no matter under what disturbs, timer all can leave or regularly closes requirement by the timing of setting, and continues continuous operation like clockwork.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is the outline drawing of bi-directional power timer;

Fig. 2 is the circuit block diagram of bi-directional power timer;

Fig. 3 is a kind of physical circuit example of bi-directional power timer;

Fig. 4 is the circuit block diagram of unidirectional Power supply timer;

Fig. 5 is a kind of physical circuit example of unidirectional Power supply timer.

With reference to Fig. 1, the surface arrangement of bi-directional power timer casing 1 have 2,3, one on 5,6, two groups of time adjustment buttons of two time displays regularly choice-start select K switch ₁, selector switch K is closed in a timing ₂, and power input line and

power output socket

8,4,7 is two light-emitting diodes among the figure, display power supply is imported and the power supply output state respectively, the circuit that is provided with in the casing is illustrated with reference to Fig. 2, and it comprises the load switching circuit 11 of exercising the power supply switching, and by two timing generator T _A, T _B, regularly choice-start is selected K switch ₁, regularly close selector switch K ₂, bistable trigger-action circuit 9, the control circuit that power amplifier 10 is formed.Two timing generators produce respectively according to setting-up time regularly to be connected or the timing cut-off signals, respectively hang oneself and regularly open or regularly close the connection of selector switch and bistable trigger-action circuit, and by the output of bistable trigger-action circuit after power amplifier amplifies, go to drive the switch motion of load switching circuit, make power connection or cut-out.

In the bi-directional power timer physical circuit shown in Fig. 3, its load switching circuit is through transformer TB, D by 220 volts of voltages ₉～D ₁₂The bridge rectifier rectification that constitutes, filter capacitor C ₃After the filtering, to the circuit of relay J coil power supply, the adhesive of relay or release movement are controlled by the bistable state output state in the control circuit.In this example, signal generator T is opened in the timing of control circuit _A, regularly close signal generator T _BAll adopt the electronic watch core with the noisy function of newspaper, these two electronic watch cores are respectively through T ₁, regularly choice-start is selected K switch ₁, D ₄And T ₆, regularly close selector switch K ₂, D ₁₃Link to each other with bistable trigger-action circuit.Bistable trigger-action circuit is by T ₂, T ₃And be connected to T ₂The D of base stage ₂, D ₃, be connected to T ₃The D of base stage ₆, D ₇Be connected to T ₃Collector electrode and D ₂Between D ₁, be connected to T ₂Collector electrode and D ₇Between D ₅And corresponding resistance constitutes.The operation principle of this circuit is: when the time opening time then, by electronic watch core T _AThe noisy signal of audio frequency newspaper that sends makes T ₁Conducting, T ₁The collector potential step-down is if at this moment the timing choice-start is selected K switch ₁Closure, then signal is through D ₄, D ₂, D ₃Make T ₂End T ₃Conducting, the output state of bistable trigger-action circuit are a point current potential height, and b point current potential is low, and remains unchanged, and at this moment a point high potential will make compound power tube T ₄, T ₅Conducting, and drive the relay adhesive, so power connection is powered the red light emitting diodes LED of while display power supply output state to power consumption equipment ₁Bright.When the timing turn-off time then, by electronic watch core T _BThe noisy signal of audio frequency newspaper that sends makes T ₆At this moment conducting if regularly close selector switch K ₂Closure, then signal is through D ₁₃, D ₇, D ₆Make T ₃End T ₂Conducting, bistable trigger-action circuit output state are that a point current potential is low, and b point current potential height also remains unchanged, so power tube T ₄, T ₅End, relay is discharged, power consumption equipment outage, LED simultaneously ₁Extinguish.Green LED LED ₂The display power supply input state.

Use for convenient, be preferably in to be provided with in the control circuit and manually promptly drive button and manually promptly close button, these two buttons are arranged in the casing surface, and like this, the switching signal of telecommunication will directly be sent and be sent into bistable trigger-action circuit by hand push button, can realize real-time control.In the circuit that this example provides, manually promptly open button ZG and be connected to regularly choice-start and select K switch ₁And between the ground, manually promptly close button ZQ and be connected to and regularly close selector switch K ₂And between the ground,, can make T artificially when pressing button ZG or ZQ ₂End or conducting, change a point current potential, thereby make relay adhesive or release, so that turn on and off power supply immediately.

The profile of unidirectional Power supply timer is similar to Fig. 1, just has only a time display on the surface of casing 1, one group of time adjustment button, a timing ON/OFF selector switch K ₃The light-emitting diode of display power supply input and output state respectively and power input line, power output socket are also arranged, the circuit that is provided with in casing is illustrated with reference to Fig. 4, it comprises the load switching circuit 11 of control power supply switching, and by timing generator T, timing ON/OFF selector switch K ₃Bistable trigger-action circuit 9, the control circuit that power amplifier 10 is formed, connect through timing ON/OFF selector switch and bistable trigger-action circuit by the signal that turns on and off that timing generator produces, and by the output of bistable trigger-action circuit after power amplifier amplifies, go to drive the switch motion of load switching circuit, make power connection or cut-out.

In the unidirectional Power supply timer physical circuit shown in Fig. 5, its load switching circuit, bistable trigger-action circuit, power amplifier is all identical with the practical circuit that above-mentioned bi-directional power timer provides, here, timing generator T also adopts the electronic watch core with the noisy function of newspaper, and this electronic watch core is through T ₁, D ₄With timing ON/OFF selector switch K ₃Moving point link to each other two fixed point A of switch ₁, A ₂Respectively and and T ₂The D that base stage links to each other ₂With with T ₃The D that base stage links to each other ₇Connect, the operating state that timing is opened or regularly closed is by timing ON/OFF selector switch K ₃Select decision, as selector switch K ₃Invest A ₁End, when timing then, the audio frequency newspaper that is sent by the electronic watch core T signal that makes a noise makes T ₁Conducting, T ₁The collector potential step-down, at this moment signal is through D ₄, D ₂, D ₃Make T ₂The base potential step-down, T ₂End T ₃Conducting.The output state of bistable trigger-action circuit is an a point current potential height, and b point current potential is low, and remains unchanged, and a point high potential will make T ₄, T ₅Conducting, and drive the relay adhesive, power connection, to the power consumption equipment power supply, and LED ₁Bright, if selector switch K ₃Invest A ₂End then work as timing then, otherwise its operating state just in time, and relay discharges, dump, LED ₁Extinguish.

Use for convenient, be preferably in manual instant on switch button also is set in the control circuit, this button also is arranged in the casing surface, is convenient to real-time control.In the circuit that this example provides, manually instant on switch button Z is connected on and timing ON/OFF selector switch K ₃The D that links to each other of moving point ₄And between the ground, press this button, then the switching signal of telecommunication will directly enter bistable circuit, just can realize switching on or off immediately power supply.

The control circuit of above-mentioned bi-directional power timer or unidirectional Power supply timer is all battery-powered.Timing generator in the control circuit also can regularly leave or regularly close signal and report the signal that makes a noise to provide by the audio frequency of IC chip with other clock IC chip.And the non-contact switch circuit that load switching circuit also can be made up of bidirectional triode thyristor and circuits for triggering thereof.The The Trigger of Bidirectional Triode Thyristor signal is controlled by the output state of bistable circuit, the adding of triggering signal or remove the conducting or the blocking-up of decision bidirectional triode thyristor, thus control switches on or off the power consumption equipment power supply.

Two-way or the unidirectional Power supply timer that the utility model provides is dealt with temporary interruption, strong, safe and reliable to operation, the good stability of antijamming capability, for example, temporary interruption, and when restoring electricity before (or closing) time of regularly opening arrives, timer still can be switched on or switched off load circuit by (or closing) time of opening of former setting; As temporary interruption and in (or closing) time of setting of opening when just restoring electricity later, because the memory function of bistable circuit, so still can be after restoring electricity by (or closing) the requirement work of opening of former setting; And for example circuit is by the time action of setting, and is switched on or switched off temporary interruption under the situation of load circuit on request, and then also because the memory function of bistable circuit makes when restoring electricity, the operating state of load circuit is constant.

The Power supply timer that the utility model provides can be widely used in industrial and mining enterprises, public institution, family etc., and all need carry out time opening or regularly turn-off the occasion of controlling power consumption equipment.

Claims

1, a kind of electronic double is to Power supply timer, by casing with place the set of circuits in the casing to be formed, it is characterized in that in the surface arrangement of casing two time displays being arranged, two groups of time adjustment buttons, and a timing choice-start is selected switch [K ₁], selector switch [K is closed in a timing ₂], and power input line and power output socket; Circuit in casing comprises the load switching circuit [11] of exercising the power supply switching and by two timing generator [T _A, T _B], regularly choice-start is selected switch [K ₁], regularly close selector switch [K ₂], bistable trigger-action circuit [9], power amplifier [10] are formed opens and shuts off control circuit, and control circuit is battery-powered; Connect or the timing cut-off signals by the timing that two timing generators produce respectively, respectively hang oneself and regularly open or regularly close the connection of selector switch and bistable trigger-action circuit, and by the output of bistable trigger-action circuit after power amplifier amplifies, the switch that removes to drive load switching circuit is done the action of opening or cutting off the electricity supply.

2, by the described bi-directional power timer of claim 1, it is characterized in that in control circuit, also being provided with and manually promptly drive button (ZG), manually promptly close button (ZQ), manually promptly drive button and be connected to regularly choice-start and select switch (K ₁) and ground between, manually promptly close button and be connected to and regularly close selector switch (K ₂) and ground between, these two manually is that the open and close button is arranged in the casing surface.

3, by the described bi-directional power timer of claim 1, it is characterized in that timing generator (T _A, T _B) be electronic watch core or other clock IC chip with the noisy function of newspaper.

4, by the described bi-directional power timer of claim 1, it is characterized in that said bistable trigger-action circuit is by T ₂, T ₃And be connected to T ₂The D of base stage ₂, D ₃, be connected to T ₃The D of base stage ₆, D ₇Be connected to T ₃Collector electrode and D ₂Between D ₁, be connected to T ₂Collector electrode and D ₇Between D ₅And corresponding resistor constitutes.

5, by the described bi-directional power timer of claim 1, it is characterized in that said load switching circuit is by transformer (TB), (D ₉～D ₁₂) bridge rectifier that constitutes, filter capacitor (C ₃) and the circuit formed of relay (J), or the non-contact switch circuit of forming by bidirectional triode thyristor and circuits for triggering thereof.