CN207251176U - GFCI built-in timer circuits - Google Patents

Abstract

A kind of GFCI built-in timers circuit, including GFCI circuit module and timer circuit module are the utility model is related to, GFCI circuit module includes rectifier bridge, buckle releaser, electric-leakage detection circuit and control circuit, the cathode output end connection buckle releaser of rectifier bridge；Electric-leakage detection circuit connects control circuit, and control circuit connects buckle releaser；The timer circuit module includes reduction voltage circuit, current rectifying and wave filtering circuit and Timer Controlling chip, reduction voltage circuit and current rectifying and wave filtering circuit provide DC power supply for Timer Controlling chip, the control side of the Timer Controlling chip connection photoelectrical coupler, the outlet side of the photoelectrical coupler then connect the control circuit of GFCI circuit module.Earth leakage protective device GFCI and timer are combined together by the utility model; allow power supply of the timer via the trip switch disconnecting consumers of earth leakage protective phase GFCI; allow earth leakage protective phase GFCI and timer to share a relay to realize device corresponding function, save production cost.

Description

GFCI built-in timer circuits

Technical field

It the utility model is related to a kind of earth fault leakage protection circuit, and in particular to a kind of GFCI built-in timers electricity Road.

Background technology

GFCI (Ground Fault Circuit Interrupter) is an earth fault earth leakage protective device, is purport Protecting people from the device of serious or fatal electric shock.Because GFCI detects earth fault, it is electric that it is also possible to prevent some Fire and the seriousness of reduction other people interrupt the electric current of stream.Operation principle is as follows, wiring system in the family, in a power supply On socket, the electric current of firewire and zero curve should be equal under normal circumstances, and GFCI monitors its difference between current, once its difference is more than 5 millis Peace, it just can be by dump, so as to ensure that personal safety.

At present, GFCI and timer are arranged on the circuit between mains electricity input end and alternating current output terminal, alternating current output terminal Connection load, GFCI connect load by respective relay respectively with timer, to control the break-make of load power source, thus deposit In certain waste.

In addition, the earth leakage protective device GFCI that big multi-load uses now is plug-type, and timer is then arranged on electric leakage It is to be needed with big multi-load using specific power cord to connect alternating current, this allows for pumping between protector GFCI and load There are inconvenience when in use.

Utility model content

The purpose of this utility model is to provide a kind of GFCI built-in timers circuit, it is electric by GFCI circuit and timer Road is combined together, and it is shared a relay, so as to save cost.

To achieve these goals, the technical solution adopted in the utility model is：

A kind of GFCI built-in timers circuit, including GFCI circuit module and timer circuit module, GFCI circuit module Including rectifier bridge, buckle releaser, electric-leakage detection circuit and control circuit, two exchange ends of rectifier bridge connect the fire of alternating current input respectively Line and zero curve, the cathode output end connection buckle releaser of rectifier bridge；Electric-leakage detection circuit connects control circuit, and control circuit connects Buckle releaser；The timer circuit module includes reduction voltage circuit, current rectifying and wave filtering circuit and Timer Controlling chip, reduction voltage circuit and Current rectifying and wave filtering circuit provides DC power supply for Timer Controlling chip, and the Timer Controlling chip is connected with photoelectrical coupler, The control side connection Timer Controlling chip of the photoelectrical coupler, outlet side connect the control circuit of GFCI circuit module.

The Timer Controlling chip is connected with display circuit and timing setting key.

The buckle releaser includes coil L1 and trip switch S3, and control circuit includes triode Q1 and resistance R2；Coil L1 One end connection rectifier bridge cathode output end, the collector of other end connecting triode Q1；The base stage connection of triode Q1 One end of resistance R2, the anode of the signal triggering control element SCR of the other end connection electric-leakage detection circuit of resistance R2, the signal Trigger the emitter of the cathode connected to the transistor Q1 of control element SCR；The control side anode connection timing of the photoelectrical coupler Device control chip, control side cathode connection ground terminal；The control terminal of the outlet side difference connecting triode Q1 of the photoelectrical coupler Connected with ground terminal, parallel-connection structure is formed with the signal triggering control element SCR of electric-leakage detection circuit.The utility model will leak electricity Protector GFCI and timer are combined together so that timer can disconnect negative via the trip switch of earth leakage protective phase GFCI The power supply of load so that earth leakage protective phase GFCI and timer can share a relay to realize device corresponding function, save life Produce cost.

In addition, earth leakage protective device GFCI and timer can be arranged in load after being combined together, make load and city The power cord of electrical connection routinizes, the use of convenient load.

Brief description of the drawings

Fig. 1 is the circuit diagram of the utility model.

Embodiment

The utility model is described in detail below with reference to Figure of description and specific embodiment.

The utility model discloses a kind of GFCI built-in timers circuit, it includes GFCI circuit module 1 and timer electricity Road module 2.

As shown in Figure 1, GFCI circuit module 1 includes rectifier bridge 11, buckle releaser 12 and electric-leakage detection circuit 13, buckle releaser 12 Including coil L1 and trip switch S3, two exchange ends of rectifier bridge 11 connect the firewire and zero curve of alternating current input, rectifier bridge respectively One end of 11 cathode output end connection coil L1, the collector of the other end connecting triode Q1 of coil L1；Triode Q1 Base stage connection resistance R2 one end, the other end of resistance R2 is the control terminal of triode Q1, end connection electric-leakage detection circuit Signal triggering control element SCR anode, the transmitting of the cathode of signal triggering control element SCR then connecting triode Q1 Pole.Above-mentioned triode Q1 and resistance R2 form the control circuit 14 of GFCI circuit module 1.

Timer circuit module 2 includes reduction voltage circuit 21, current rectifying and wave filtering circuit 22 and Timer Controlling chip 23, decompression electricity Road 21 and current rectifying and wave filtering circuit 22 provide DC power supply for Timer Controlling chip 23, and Timer Controlling chip 23 is connected with display Circuit 24 and timing setting key T, and the Timer Controlling chip 23 is connected with a photoelectrical coupler 25, which controls Side anode connection Timer Controlling chip 23 processed, control side cathode connection ground terminal；The outlet side difference of the photoelectrical coupler 25 The control terminal and ground terminal of connecting triode Q1, parallel-connection structure is formed with the signal triggering control element SCR of electric-leakage detection circuit, Play the purpose of 2 independent control of GFCI circuit module 1 and timer circuit module.

Load is connected after earth leakage protective device GFCI and timer after alternating current input, when leaking electricity, detection of electrical leakage electricity The signal triggering control element SCR conductings on road 13, the control terminal of triode Q1 is low level, and triode Q1 is disconnected, buckle releaser 12 Coil L1 controls trip switch S3 disconnect, thereby turn off the power supply of load.

In the case of not leaking electricity, by Timer Controlling load working time when, terminate when the working time of setting When, control side input signal of the Timer Controlling chip 23 to photoelectrical coupler, thus, the outlet side output of photoelectrical coupler 25 Low level so that the control terminal of triode Q1 is low level, and triode Q1 is disconnected, the coil L1 control trip switch of buckle releaser 12 S3 is disconnected, and thereby turns off the power supply of load.

The utility model it is critical that earth leakage protective device GFCI and timer are combined together by the utility model, make Timer can be via the power supply of the trip switch disconnecting consumers of earth leakage protective phase GFCI so that earth leakage protective phase GFCI and fixed When device can share a relay to realize device corresponding function, save production cost.In addition, earth leakage protective phase GFCI and timing Device can be arranged in load after being combined together, and the power cord that load is electrically connected with city is routinized, and convenient load makes With.

The above, is only the utility model embodiment, not makees any limit to the technical scope of the utility model System, therefore every any trickle amendment made according to the technical essence of the utility model to above example, equivalent variations are with repairing Decorations, in the range of still falling within technical solutions of the utility model.

Claims (3)

1. A kind of 1. GFCI built-in timers circuit, it is characterised in that：Including GFCI circuit module and timer circuit module, GFCI Circuit module includes rectifier bridge, buckle releaser, electric-leakage detection circuit and control circuit, and two exchange ends of rectifier bridge connect alternating current respectively The firewire and zero curve of input, the cathode output end connection buckle releaser of rectifier bridge；Electric-leakage detection circuit connects control circuit, and controls Circuit connects buckle releaser；The timer circuit module includes reduction voltage circuit, current rectifying and wave filtering circuit and Timer Controlling chip, drop Volt circuit and current rectifying and wave filtering circuit provide DC power supply for Timer Controlling chip, and the Timer Controlling chip is connected with photoelectricity Coupler, the control side connection Timer Controlling chip of the photoelectrical coupler, the control electricity of outlet side connection GFCI circuit module Road.
2. 2. GFCI built-in timers circuit according to claim 1, it is characterised in that：The Timer Controlling chip connection There are display circuit and timing setting key.
3. 3. GFCI built-in timers circuit according to claim 1, it is characterised in that：The buckle releaser include coil L1 and Trip switch S3, control circuit include triode Q1 and resistance R2；The cathode output end of one end connection rectifier bridge of coil L1, separately The collector of one end connecting triode Q1；One end of the base stage connection resistance R2 of triode Q1, the other end connection of resistance R2 The anode of the signal triggering control element SCR of electric-leakage detection circuit, the cathode connected to the transistor of signal triggering control element SCR The emitter of Q1；The control side anode connection Timer Controlling chip of the photoelectrical coupler, control side cathode connection ground terminal； The control terminal of the outlet side difference connecting triode Q1 of the photoelectrical coupler is connected with ground terminal, the signal with electric-leakage detection circuit Trigger control element SCR and form parallel-connection structure.