CN2852457Y - Status display circuit - Google Patents
Status display circuit Download PDFInfo
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- CN2852457Y CN2852457Y CN 200520133384 CN200520133384U CN2852457Y CN 2852457 Y CN2852457 Y CN 2852457Y CN 200520133384 CN200520133384 CN 200520133384 CN 200520133384 U CN200520133384 U CN 200520133384U CN 2852457 Y CN2852457 Y CN 2852457Y
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- display lamp
- optocoupler
- socket
- circuit
- state display
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Abstract
The utility model discloses a state display circuit, which is installed in a leakage protection power plug or power socket, used for displaying the normal operating conditions, the stand-by state and especially the end-of-life state of the power plug or the power socket. The state display circuit is composed of a stand-by state display lamp, a normal state display lamp and a photocoupler, wherein the stand-by state display lamp is directly connected in series in a power supply circuit of a control chip of the leakage protection power plug or the power socket, one end of the stand-by state display lamp is connected with a power input pin of the control chip, and the other end is connected to a positive pole of a DC source output by a rectification circuit of the leakage protection power plug or the power socket through a voltage stabilizing tube; a primary pole of the photocoupler is connected to a fire wire and a zero line of an output end of the leakage protection power plug or the power socket after connected in series with a resistor; the normal state display lamp is connected in series in a secondary circuit of the photocoupler, and the normal state display lamp is connected in parallel with the stand-by state display lamp and the voltage stabilizing tube which are connected in series after connected in series with a secondary triode of the photocoupler.
Description
Technical field
The utility model relate to a kind of be installed in attaching plug with creepage protection function/or supply socket (GFCI) in, be used for display power supply plug/or the status display circuit of jack life termination state.
Background technology
The safe in utilization of household electrical appliance is subject to people's attention day by day; in order to guarantee the safe in utilization of household electrical appliance; avoid because the current supply circuit short circuit causes burning of household electrical appliance; and, at the input of household electrical appliance attaching plug with creepage protection function/or supply socket is installed all usually because the electric leakage of household electrical appliance causes user's personal injury.
At present, most attaching plug with creepage protection function/or socket (GFCI), though all have creepage protection function, all there is not the end-of-life Presentation Function.When the attaching plug with creepage protection function/or the inner electronic component of socket (GFCI) partly damage (as short circuit, open circuit etc.) and when losing creepage protection function; can not in time remind this attaching plug of user/or socket do not had safety protection function, can not continue again to use.So, in case the user has used the attaching plug that loses creepage protection function/or socket, very possible occur because attaching plug with creepage protection function/or socket lost efficacy dead accident of electric shock that causes and the phenomenon generation of burning electrical equipment.
Fig. 1 is existing attaching plug with creepage protection function/or socket (GFCI) internal control circuit figure.As shown in the figure, it mainly by direct current rectification circuit D1, be used to detect two of leakage current and with control chip IC1 (model RV4145), reset button RESET, analogue test button TEST and some resistance, electric capacity, diode that 200: 1 magnetic test coil RING1, RING2, relay R ELAY, controllable silicon SCR, being used to of with magnetic test coil linking to each other trigger controllable silicon SCR conducting form at 1000: 1.One end of relay R ELAY coil links to each other with the dc power anode of direct current rectification circuit D1 output, the other end of relay R ELAY coil links to each other with ground, the normally opened contact S of relay R ELAY is connected among attaching plug/socket power output LOAD, and its normally opened contact S contacts with reset button RESET.The difference of this relay R ELAY and common relay is: when relay R ELAY coil gets when electric, the magnetic field that its coil produces is not enough so that its normally opened contact S adhesive only just can make its normally opened contact closure by external force; When its coil two terminal shortcircuits, the normally opened contact S automatic disconnection that it is closed, reset button RESET escape; When relay R ELAY fault or relay R ELAY power supply circuits fault, there is not electric current to flow through in the time of can not producing magnetic field in its coil, push its normally opened contact in any case, its normally opened contact all can't be closed, the closed automatic escape of normally opened contact S meeting, disconnection.The anode of a controllable silicon SCR resistance R 5 back of connecting links to each other with the dc power anodes of direct current rectification circuit D1 output, and its negative electrode links to each other with the earth, and its trigger electrode links to each other with the control signal output pin 5 of control chip IC1.
When the attaching plug with creepage protection function/or socket is intact, all are normal; after correctly being linked into power input; relay R ELAY coil gets; at this moment; press reset button RESET,, be connected on the normally opened contact S closure of the relay R ELAY of plug power output end by the help of reset button RESET external force; the three-phase socket of plug 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, short circuit 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 chip IC, 5 pin of chip IC output control signals to the trigger electrode of controllable silicon SCR, make the controllable silicon SCR conducting, make relay R ELAY coil two terminal shortcircuits, the power supply output of socket is cut off in its normally opened contact S escape, disconnection.Attaching plug with creepage protection function/or just often whether function of socket, also can press test switch TEST, produces a simulation leakage current when detecting.If have the attaching plug of creepage protection function/or socket all are normal; after its magnetic test coil detects this phenomenon; make chip IC export a control signal; make the controllable silicon SCR conducting; make relay R ELAY coil two terminal shortcircuits; the power supply output of socket is cut off in its normally opened contact S escape, disconnection, illustrates that this has that the attaching plug of creepage protection function/or function of socket is intact.
When the attaching plug with creepage protection function/or the work of socket inner member all just often, intact attaching plug with creepage protection function/or socket can realize protective effect, guarantee the safety of electrical equipment.But; when the attaching plug with creepage protection function/or the 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; above-mentioned attaching plug with creepage protection function/or socket in control circuit 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, that will certainly give user's personal safety and electric equipment safe in utilizationly has harm.
Summary of the invention
In view of the foregoing, the purpose of this utility model provides a kind of status display circuit in the attaching plug/supply socket (GFCI) with creepage protection function, that be used for display power supply plug normal operating conditions, holding state, particularly end-of-life status that is installed in.
For achieving the above object, the utility model adopts following design: a kind of status display circuit is characterized in that: it is made up of holding state display lamp, normal condition display lamp, optocoupler, voltage-stabiliser tube, electric capacity;
The holding state display lamp directly be connected on attaching plug with creepage protection function/or the power supply circuits of socket control chip in, the one end links to each other with the power supply input pin of control chip, its other end by voltage-stabiliser tube, resistance and have the attaching plug of creepage protection function/or the dc power anode of the rectification circuit output of socket link to each other;
Elementary and the resistance of optocoupler series connection back and plug with creepage protection function/or the live wire of socket power output link to each other with zero line;
The normal condition display lamp is connected in the secondary circuit of optocoupler, and the normal condition display lamp is connected with the secondary triode of optocoupler afterwards and the holding state display lamp of connecting, voltage-stabiliser tube parallel connection;
Also be parallel with an electric capacity at the normal condition display lamp of series connection and the two ends of the secondary triode of optocoupler.
Described holding state display lamp, normal condition display lamp constitute common cathode jointly or are total to the double-colored display lamp of anode.
Described optocoupler can be the two-way optocoupler of input, or the unidirectional optocoupler of the input of two parallel connections.
The utility model has the advantages that: circuit structure is simple, can distinguish exactly to demonstrate attaching plug/socket (GFCI) holding state, normal operating conditions and the end-of-life status with creepage protection function.When the attaching plug/socket with creepage protection function (GFCI) end-of-life, can clearly tell the user, remind the user in time to change, protect the safety of personal safety and electric equipment effectively.
Description of drawings
Fig. 1 is existing attaching plug/socket control circuit physical circuit figure with creepage protection function
Fig. 2 is the physical circuit figure of the utility model status display circuit
Fig. 3 is another physical circuit figure of the utility model status display circuit
Fig. 4 is the another physical circuit figure of the utility model status display circuit
Fig. 5 is a physical circuit figure again of the utility model status display circuit
Embodiment
In order to reflect intuitively attaching plug with creepage protection function/or whether socket work is normal; promptly when the attaching plug with creepage protection function/or jack life termination or inner member break down and can't can remind the user to change socket in time during operate as normal; the utility model has increased attaching plug that can reflect to have creepage protection function/or socket state, the particularly status display circuit of end-of-life status in control circuit.
As shown in Figure 2, this display circuit is made of holding state display lamp LED1, normal condition display lamp LED2, the two-way optocoupler IC2 of input, voltage-stabiliser tube Z2, capacitor C 7.Holding state display lamp LED1 directly is connected in the power supply circuits of control chip IC1, and the one end links to each other with the power supply input pin 6 of chip IC 1, and its other end links to each other with the dc power anode of rectification circuit D1 output by voltage-stabiliser tube Z2, resistance R 4.Elementary and the resistance R 7 series connection back of the optocoupler IC2 that input is two-way and plug/or the live wire HOT of socket power output LOAD link to each other with zero line WHITE; Normal condition display lamp LED2 is connected in the secondary circuit of optocoupler IC2, and IC2 level of normal condition display lamp LED2 and optocoupler triode is connected afterwards and the state display lamp LED1 that connects, voltage-stabiliser tube Z2 parallel connection.And, a state display lamp LED1 that promptly connects at the two ends of normal condition display lamp LED2 that connects and IC2 utmost point triode of optocoupler and the two ends capacitor C 7 also in parallel of voltage-stabiliser tube Z2.
When the attaching plug that has above-mentioned status display circuit/or after socket correctly inserted power input with creepage protection function; if attaching plug/or socket in element intact; working properly; the alternating current of power input is after rectification circuit D1 rectification; make relay R ELAY coil two ends charged; there is electric current to flow through in the coil; simultaneously; the alternating current of power input also passes through the resistance R 4 in the display circuit after rectification circuit D1 rectification; voltage-stabiliser tube Z2; holding state display lamp LED1 gives chip IC 1 power supply; owing to have electric current to flow through in the holding state display lamp LED1; LED1 is bright; and this moment, owing to do not push reset button RESET, the output of attaching plug/socket does not have voltage output; not conducting of optocoupler IC2; no current flows through in the normal condition display lamp LED2, and LED2 does not work, so; LED1 is bright when the holding state display lamp; when normal condition display lamp LED2 does not work, illustrate this have the attaching plug of creepage protection function/or socket be in holding state.
When pressing reset button RESET; make attaching plug/or the input LINE of socket be connected with the contact of output LOAD; when output LOAD has electric power output; the elementary conducting of optocoupler IC2; the secondary also conducting of optocoupler IC2; alternating current after rectification circuit D1 rectification is by resistance R 4; optocoupler secondary; normal condition display lamp LED2 gives chip IC 1 power supply; LED2 is bright for the normal condition display lamp; because the conducting of LED2; the two ends that make holding state display lamp LED1 are by the secondary short circuited of optocoupler IC2; LED1 extinguishes; so; LED2 is bright when the normal condition display lamp, when holding state display lamp LED1 extinguishes, illustrate this have the attaching plug of creepage protection function/or socket be in normal operating state.
When pressing test button TEST, make the zero line WHITE short circuit of live wire HOT and the input LINE of attaching plug/socket output LOAD by force, give magnetic test coil RING1, RING2 applies a simulation leakage current, after IC1 detects electric leakage signal, pin 5 outputs one triggering signal of IC1, make the controllable silicon SCR conducting, reduce the operating voltage of relay R ELAY, make the normally opened contact S escape of the relay R ELAY that is connected on attaching plug/socket output, disconnect, normal condition display lamp LED2 extinguishes, LED1 is bright for the holding state display lamp, attaching plug/or socket turn back to holding state again.
Holding state display lamp LED1 does not work when not pushing reset button RESET; or normal condition display lamp LED2 does not work when pushing reset button RESET; or LED1, LED2 are simultaneously bright or when not working simultaneously; illustrate that all this has the attaching plug of creepage protection function/or socket end-of-life, need change.As shown in Figure 1; when the attaching plug with creepage protection function/or socket in the portions of electronics component wear time; open circuit respectively as rectification circuit D1 or resistance R 1 or R4 or voltage-stabiliser tube Z2 etc.; or short circuit such as voltage-stabiliser tube Z1, controllable silicon SCR, relay R ELAY coil, capacitor C 7; as attaching plug/or input LINE of socket and input power connection; do not pushing reset button RESET; when plug is in holding state; because above component wear, holding state display lamp LED1 can not light.When pressing reset button RESET, attaching plug/or the output LOAD of socket still during unregulated power output, normal condition display lamp LED2 does not still work, also illustrate attaching plug/or socket in portions of electronics element such as relay R ELAY fault.
When the display circuit of the attaching plug/socket that has status display circuit with creepage protection function show this attaching plug/socket end-of-life, can't operate as normal the time, the user should in time change this attaching plug/socket.
Fig. 3 is another physical circuit figure of the utility model status display circuit.As shown in the figure, this display circuit is made up of the double-colored display lamp LED of common cathode, two-way optocoupler IC2, voltage-stabiliser tube Z2, the capacitor C 7 of input.The common cathode of the double-colored display lamp LED of common cathode directly links to each other with the power supply input pin 6 of chip IC 1; An one anode links to each other with the positive pole of the DC power supply of direct current rectification circuit D1 output by voltage-stabiliser tube Z2, resistance R 4; The triode series connection back of IC2 level of another anode and optocoupler links to each other by the positive pole of resistance R 4 with the DC power supply of direct current rectification circuit D1 output; Elementary and the resistance R 7 series connection back of the optocoupler IC2 that input is two-way and plug/or the live wire HOT of socket power output LOAD link to each other with zero line WHITE.
Among the double-colored display lamp LED, be the holding state display lamp with the display lamp LED1 that the dc power anode of rectification circuit D1 output links to each other by voltage-stabiliser tube Z2; Among the double-colored display lamp LED, be the normal condition display lamp with the display lamp LED2 that the dc power anode of direct current rectification circuit D1 output links to each other by the secondary triode of optocoupler.
As shown in Figure 3, a state display lamp LED1 that promptly connects at the two ends of normal condition display lamp LED2 that connects and IC2 utmost point triode of optocoupler and the two ends capacitor C 7 also in parallel of voltage-stabiliser tube Z2.
When the attaching plug that has status display circuit as shown in Figure 3/or after socket correctly inserted power input with creepage protection function; if attaching plug/or socket in element intact; working properly; the alternating current of power input is after rectification circuit D1 rectification; make relay R ELAY coil two ends charged; there is electric current to flow through in the coil; simultaneously; the alternating current of power input also passes through the resistance R 4 in the display circuit after rectification circuit D1 rectification; voltage-stabiliser tube Z2; holding state display lamp LED1 gives chip IC 1 power supply; owing to have electric current to flow through in the holding state display lamp LED1; LED1 is bright; and this moment, owing to do not push reset button RESET, the output of attaching plug/socket does not have voltage output; not conducting of optocoupler IC2; no current flows through in the normal condition display lamp LED2, and LED2 does not work, so; LED1 is bright when the holding state display lamp; when normal condition display lamp LED2 does not work, illustrate this have the attaching plug of creepage protection function/or socket be in holding state.
When pressing reset button RESET; make attaching plug/or the input LINE of socket be connected with the contact of output LOAD; when output LOAD has electric power output; the elementary conducting of optocoupler IC2; the secondary also conducting of optocoupler IC2; alternating current after rectification circuit D1 rectification is by resistance R 4; optocoupler secondary; normal condition display lamp LED2 gives chip IC 1 power supply; LED2 is bright for the normal condition display lamp; because the conducting of LED2; the two ends that make holding state display lamp LED1 are by the secondary short circuited of optocoupler IC2; LED1 extinguishes; so; LED2 is bright when the normal condition display lamp, when holding state display lamp LED1 extinguishes, illustrate this have the attaching plug of creepage protection function/or socket be in normal operating state.
Holding state display lamp LED1 does not work when not pushing reset button RESET; or normal condition display lamp LED2 does not work when pushing reset button RESET; or LED1, LED2 are simultaneously bright or when not working simultaneously; illustrate that all this has the attaching plug of creepage protection function/or socket end-of-life, need change.
Fig. 4 is the another physical circuit figure of the utility model status display circuit.As shown in the figure, this display circuit is by the double-colored display lamp LED of anode, two-way optocoupler IC2, voltage-stabiliser tube Z2, the capacitor C 7 of input are formed altogether.The common anode of the double-colored display lamp LED of anode links to each other by the positive pole of resistance R 4 with the DC power supply of direct current rectification circuit D1 output altogether, the negative electrode of the double-colored display lamp LED of anode links to each other with the power supply input pin 6 of chip IC 1 by voltage-stabiliser tube Z2 altogether, and the triode series connection back of IC2 level of another negative electrode and optocoupler links to each other with the power supply input pin 6 of chip IC 1; Elementary and the resistance R 7 series connection back of the optocoupler IC2 that input is two-way and plug/or the live wire HOT of socket power output LOAD link to each other with zero line WHITE.
Among the double-colored display lamp LED, be the holding state display lamp with the display lamp LED1 that chip IC 1 power supply input pin 6 links to each other by voltage-stabiliser tube Z2; Among the double-colored display lamp LED, be the normal condition display lamp with the display lamp LED2 that chip IC 1 power supply input pin 6 links to each other by the secondary triode of optocoupler.
The operation principle of its operation principle and Fig. 1, status display circuit shown in Figure 2 is identical.
Fig. 5 is the another physical circuit figure of the utility model status display circuit.The difference of it and status display circuit shown in Figure 1 is: the optocoupler IC2 that constitutes status display circuit shown in Figure 1 is the two-way optocoupler of input, and the optocoupler that constitutes status display circuit shown in Figure 5 is an optocoupler two parallel connections, that input is unidirectional.
In like manner, the two-way optocoupler IC2 of input in Fig. 3, the status display circuit shown in Figure 4 also can be replaced by optocoupler two parallel connections, that input is unidirectional.
The operation principle of its operation principle of status display circuit shown in Figure 5 and Fig. 2, Fig. 3, status display circuit shown in Figure 4 is identical.
The utility model circuit structure is simple, can distinguish exactly to demonstrate attaching plug/socket (GFCI) holding state, normal operating conditions and the end-of-life status with creepage protection function.When the attaching plug/socket with creepage protection function (GFCI) end-of-life, can clearly tell the user, remind the user in time to change, protect the safety of personal safety and electric equipment effectively.
The above is specific embodiment of the utility model and the know-why used, and is any based on the equivalent transformation on the technical solutions of the utility model basis, all belongs within the utility model protection range.
Claims (5)
1, a kind of status display circuit is characterized in that: it is made up of holding state display lamp (LED1), normal condition display lamp (LED2), optocoupler (IC2), voltage-stabiliser tube (Z2), electric capacity (C7);
Holding state display lamp (LED1) directly be connected on attaching plug with creepage protection function/or the power supply circuits of socket control chip (IC1) in, the one end links to each other with the power supply input pin (6) of control chip (IC1), its other end by voltage-stabiliser tube (Z2), resistance (R4) and attaching plug with creepage protection function/or the dc power anode of rectification circuit (D1) output of socket link to each other;
Elementary and the resistance (R7) of optocoupler (IC2) series connection back and plug with creepage protection function/or the live wire of socket power output link to each other with zero line;
Normal condition display lamp (LED2) is connected in the secondary circuit of optocoupler (IC2), and normal condition display lamp (LED2) is connected with the secondary triode of optocoupler afterwards and the holding state display lamp (LED1) of connecting, voltage-stabiliser tube (Z2) parallel connection;
Also be parallel with an electric capacity (C7) at the normal condition display lamp (LED2) of series connection and the two ends of the secondary triode of optocoupler (IC2).
2, status display circuit according to claim 1 is characterized in that: described holding state display lamp, normal condition display lamp constitute the double-colored display lamp of common cathode jointly.
3, according to claim 1, it is characterized in that: described holding state display lamp, the common formation of normal condition display lamp be the double-colored display lamp of anode altogether.
4, according to claim 1 or 2 or 3 described, it is characterized in that: described optocoupler is the two-way optocoupler of input.
5, according to claim 1 or 2 or 3 described, it is characterized in that: described optocoupler is the unidirectional optocoupler of the input of two parallel connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520133384 CN2852457Y (en) | 2005-11-22 | 2005-11-22 | Status display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520133384 CN2852457Y (en) | 2005-11-22 | 2005-11-22 | Status display circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2852457Y true CN2852457Y (en) | 2006-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520133384 Expired - Fee Related CN2852457Y (en) | 2005-11-22 | 2005-11-22 | Status display circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2852457Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541287A (en) * | 2018-12-29 | 2019-03-29 | 天津康途科技有限公司 | A kind of leak current detection device |
-
2005
- 2005-11-22 CN CN 200520133384 patent/CN2852457Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541287A (en) * | 2018-12-29 | 2019-03-29 | 天津康途科技有限公司 | A kind of leak current detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061227 Termination date: 20131122 |