CN2840400Y

CN2840400Y - Leakage protection socket service life stop display circuit

Info

Publication number: CN2840400Y
Application number: CN 200520130028
Authority: CN
Inventors: 黄华道
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-01
Filing date: 2005-11-01
Publication date: 2006-11-22
Anticipated expiration: 2015-11-01

Abstract

The utility model discloses a circuit for displaying the end of the service life of a leakage protection socket, which is composed of a red luminescent diode, wherein an anode of the red luminescent diode is connected with a fire wire of a power output terminal of the leakage protection socket and a cathode is connected with a zero line of a power input terminal of the leakage protection socket after connected in series with a simulation test button of the leakage protection socket. When a built-in component of the leakage protection socket is under the condition of malfunction which means the leakage protection socket is disabled, a user presses the simulation test button, and the red luminescent diode in the end-of-life display circuit can continuously emit light to notify the user that the leakage protection socket has not the function of leakage protection already and advise the user to cut off the socket power input and change a new leakage protection socket in time. The utility model has the advantages of simple structure, clear indication, favorable performance and high safety and more importantly the utility model can effectively reduce the accidental occurrence of death by electric shock.

Description

The current leakage jack life termination display circuit

Technical field

The utility model relates to a kind of display circuit, indicator light display circuit in especially a kind of retaining socket (GFCI) that is applied to leak electricity, that be used to show the current leakage jack life termination state.

Background technology

Along with popularizing of household electrical appliance, when household electrical appliance offered convenience to people, its fail safe is paid more and more attention also.Therefore; various earth leakage protective sockets are born thereupon; yet meanwhile; fault or end-of-life have occurred if the problem of another worth people's deep thinking is exactly an earth leakage protective socket itself, can't play a protective role, and the user has not known fully; in this case; earth leakage protective socket not only can not play a protective role, and, also can cause damage to user's person and property.Therefore; safe condition for earth leakage protective socket itself also should be informed the user with a kind of mode; when earth leakage protective socket itself breaks down or after end-of-life loses protective effect; in time inform the user; cause user's attention; the earth leakage protective socket that replacing has in time been broken down prevents the dead accident of electric shock that lost efficacy and cause owing to earth leakage protective socket.

Yet at present, the earth leakage protective socket of selling on the market does not have the end-of-life display circuit.When the element in the earth leakage protective socket breaks down or after its end-of-life loses protective effect; the user does not know; still push its reset button; it is resetted and energized, in this case, in case occur leak current fault in the circuit; this earth leakage protective socket does not only have protective effect; can't trip, and the accident that also very easily causes user's electric shock accidents and power consumption equipment to be burnt takes place.

Summary of the invention

In view of the foregoing, the purpose of this utility model provides a kind of indicator light display circuit in the earth leakage protective socket, expression jack life termination state that is applied to.This indicator light display circuit can inform clearly whether this earth leakage protective socket work of user is normal; promptly when element fault in this earth leakage protective socket can't operate as normal or during jack life termination; this display circuit can be told the user clearly, reminds the user in time to change this socket.

For achieving the above object; the utility model is by the following technical solutions: a kind of current leakage jack life termination display circuit; it is characterized in that: it is made of red light emitting diodes; the anode of this red light emitting diodes links to each other with the live wire of earth leakage protective socket power output end, and its negative electrode links to each other with the zero line of earth leakage protective socket power input with earth leakage protective socket analogue test button series connection back.

The utility model current leakage jack life termination display circuit also comprises a diode, this diode and described red light emitting diodes reverse parallel connection.

Because the utility model adopts above design; when the earth leakage protective socket inner member break down be the earth leakage protective socket disabler after; the user presses the analogue test button; light-emitting diode in the end-of-life display circuit can continue luminous; inform that this earth leakage protective socket of user has lost creepage protection function, should cut off the earth leakage protective socket that the socket power input in time more renews.The utility model is simple in structure, indicates clearly, and performance is good, and is safe and reliable, the more important thing is, the utility model can reduce the generation of the dead accident of getting an electric shock effectively.

Description of drawings

Fig. 1 is existing earth leakage protective socket internal control circuit physical circuit figure

Fig. 2 is the annexation figure of the utility model end-of-life indicator light display circuit and internal control circuit

Embodiment

Fig. 1 is the internal control circuit figure of existing earth leakage protective socket (GFCI).As shown in the figure, it mainly with 200: 1 magnetic test coil, the coil SOL that be built-in with iron core, controllable silicon SCR 1, the chip IC that be used to trigger controllable silicon SCR 1 conducting (model RV4145), reset button RESET, analogue test button TEST and some resistance, electric capacity, the diode that with magnetic test coil link to each other forms by being used to detect two of leakage current at 1000: 1.

After earth leakage protective socket correctly inserts power supply, press reset button RESET, the three-phase socket of socket output LOAD and receptacle face is charged, and electric power output is arranged.Because power firestreak HOT and zero line WHITE passed magnetic test coil 1000: 1 and 200: 1 simultaneously, when the current phasor in two circuits that pass magnetic test coil with when non-vanishing, be when having leakage current in the circuit, magnetic test coil can induce a voltage signal, voltage signal is input to signal input part 1 pin and 7 pin of IC, 5 pin of IC output control signals to the trigger electrode of controllable silicon SCR 1, make controllable silicon SCR 1 conducting, thereby coil SOL is got, its inner iron core action, drive the element action of socket inside, reset button RESET is transferred take off, cut off the power supply output of socket.

When the work of earth leakage protective socket inner member all just often, intact earth leakage protective socket can be realized protective effect, guarantees the safety of electrical equipment.But; when the earth leakage protective socket inner member breaks down or because component ageing end-of-life can't operate as normal the time; when occurring short circuit, leak current fault again in the circuit; control circuit in the above-mentioned earth leakage protective socket can't make reset button RESET escape; cut off the power supply output of socket; and the user does not know this situation, continue to use, and that will certainly give user's personal safety and electric equipment safe in utilizationly has harm.

In order to reflect intuitively whether earth leakage protective socket work is normal; promptly break down and can't can remind the user to change socket in time during operate as normal when current leakage jack life termination or inner member, the utility model have increased a current leakage jack life termination indicator light display circuit in control circuit.As shown in Figure 2, this display circuit is made up of red light emitting diodes LED and diode D5.Be connected on the simulation test circuit behind red light emitting diodes LED and the diode D5 reverse parallel connection; the anode of red light emitting diodes LED links to each other with earth leakage protective socket output live wire HOT, and its negative electrode links to each other with earth leakage protective socket input zero line WHITE by simulation test button TEST, resistance.The main effect that described diode D5 is connected in parallel on the LED two ends is to form an all-wave path in the simulation test circuit.

When whether just often detecting earth leakage protective socket work, can press simulation test button TEST earlier, make socket output live wire HOT and input zero line WHITE short circuit produce a simulation leakage current by force, red light emitting diodes LED is luminous; Output one voltage signal was given input 1 pin and 7 pin of chip IC after magnetic test coil detected this phenomenon; the control signal output ends 5 pin output one control voltage of chip IC; trigger controllable silicon SCR 1 conducting; make reset button RESET tripping operation by the element in the socket; the output of cut-out socket power; red light emitting diodes LED extinguishes; so; if red light emitting diodes LED extinguishes; illustrate that this earth leakage protective socket function is intact, the user can relievedly use, and is lasting luminous if red light emitting diodes LED does not extinguish; illustrate that this earth leakage protective socket inner member breaks down; can't operate as normal, can't make reset button RESET escape, cut off the power supply output of socket; the user should in time change socket, in order to avoid cause the dead accident of unexpected electric shock.

The utility model is simple in structure, indicates clearly, and performance is good, and is safe and reliable, the more important thing is, the utility model can reduce the generation of the dead accident of getting an electric shock effectively.

The above only is an embodiment of the present utility model, and protection range of the present utility model is not limited thereto, and anyly all belongs within the utility model protection range based on the equivalent transformation on the utility model circuit.

Claims

1, a kind of current leakage jack life termination display circuit; it is characterized in that: it is made of red light emitting diodes; the anode of this red light emitting diodes links to each other with the live wire of earth leakage protective socket power output end, and its negative electrode links to each other with the zero line of earth leakage protective socket power input with earth leakage protective socket analogue test button series connection back.

2, current leakage jack life termination display circuit according to claim 1, it is characterized in that: this display circuit also comprises a diode, this diode and described red light emitting diodes reverse parallel connection.