CN103825146A - Household electric appliance electric leakage protection socket - Google Patents
Household electric appliance electric leakage protection socket Download PDFInfo
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- CN103825146A CN103825146A CN201210468224.6A CN201210468224A CN103825146A CN 103825146 A CN103825146 A CN 103825146A CN 201210468224 A CN201210468224 A CN 201210468224A CN 103825146 A CN103825146 A CN 103825146A
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Abstract
The invention discloses a household electric appliance electric leakage protection socket comprising a power supply jack and an electric leakage protector which is connected with the power supply jack. The electric leakage protector comprises an electric leakage detection module, an electric outage execution module and a power supply module which supplies DC power supply VCC to the electric outage execution module. The electric leakage detection module is composed of a rectifier diode, a first current-limiting resistor and an optoelectronic coupler. The electric outage execution module comprises a trigger circuit, an execution circuit and an alarm circuit. The trigger circuit is composed of a 555 timer, a pull-up resistor, a timing resistor, a timing capacitor and an anti-interference capacitor. The execution circuit is composed of a coil of a relay, a normally-closed contact point of the relay and a freewheeling diode. The alarm circuit is composed of a second current-limiting resistor, a triode, a loudspeaker, a third current-limiting resistor and a red light-emitting diode. When electric leakage occurs in household electric appliances, the socket can generate acousto-optic alarm and cut off power so that the socket is simple in circuit structure, high in reliability of electric leakage protection, long in the service life and low in manufacturing cost.
Description
Technical field
The present invention relates to the socket that household electrical appliance are used.
Background technology
The shell of general household electrical appliance is all to adopt the mode of ground insulation to guarantee user's safety, damaged when the insulation of household appliances shell, and does not adopt effective safeguard measure, and accident of human electric shock very easily occurs.Older house, earth leakage protective device is not installed in existence or without electric prospection ground wire or the bad phenomenon of protective earthing, once get an electric shock, consequence is more serious.In order to reduce the generation of this situation; various earth leakage protective sockets on market, are there are; whether the principle of these earth leakage protective sockets is to detect leaking electricity by a detection of electrical leakage module, in the time electric leakage being detected, controls the power-off Executive Module deenergization being connected with outlet.But the structure of these earth leakage protective sockets is more complicated; most electromagnetic type dropout earth leakage protective modes that adopt; it has more mechanical contact; make life-span shorter, earth leakage protective action unreliable; and these earth leakage protective sockets do not have warning function; it is due to grid power blackout, blown fuse that user is hard to tell Chu or because household electrical appliance electric leakage causes power-off, further detection is confirmed, uses and makes troubles to user.
Summary of the invention
The object of this invention is to provide a kind of Household appliance leakage protection socket, can in the time that household electrical appliance leak electricity, send sound and light alarm and cut off the electricity supply, improve its earth leakage protective reliability.
Household appliance leakage protection socket of the present invention, comprise outlet and the earth leakage protective device being connected with outlet, described earth leakage protective device comprises detection of electrical leakage module, power-off Executive Module and the power module of DC power supply VCC is provided to power-off Executive Module, detection of electrical leakage module is by rectifier diode, the first current-limiting resistance and photoelectrical coupler composition, power-off Executive Module comprises circuits for triggering, executive circuit and warning circuit, circuits for triggering are by 555 timers, pull-up resistor, timing resistor, timing capacitor and anti-interference capacitor composition, executive circuit is by the coil of relay, the normally-closed contact of relay and fly-wheel diode composition, warning circuit is by the second current-limiting resistance, triode, loud speaker, the 3rd current-limiting resistance and red light emitting diodes composition.
Wherein, the positive pole of rectifier diode connects the ground wire hole of outlet, negative pole connects the positive pole of the light-emitting diode of photoelectrical coupler by the first current-limiting resistance, the negative pole of the light-emitting diode of photoelectrical coupler connects the zero line side of 220V alternating current, the collector electrode of the phototriode of photoelectrical coupler connects 2 pin of 555 timers, and meet DC power supply VCC by pull-up resistor, the grounded emitter of the phototriode of photoelectrical coupler, 6 of 555 timers, 7 pin meet DC power supply VCC by timing resistor, by timing capacitor ground connection, 4 of 555 timers, 8 pin meet DC power supply VCC, 1 pin ground connection, 5 pin are by anti-interference capacitor ground connection, 3 pin of 555 timers are succeeded coil one end of electrical equipment, the coil other end ground connection of relay, the live wire end of the normally-closed contact one termination 220V alternating current of relay, the live wire hole of another termination outlet, the null line hole of outlet connects the zero line side of 220V alternating current, the negative pole of fly-wheel diode connects 3 pin of 555 timers, plus earth, the positive pole of red light emitting diodes connects 3 pin of 555 timers by the 3rd current-limiting resistance, minus earth, the base stage of triode connects 3 pin of 555 timers by the second current-limiting resistance, grounded emitter, collector electrode connects one end of loud speaker, another termination DC power supply VCC of loud speaker.
Further, described power module comprises capacitance-resistance voltage reduction circuit, current rectifying and wave filtering circuit and voltage stabilizing circuit, capacitance-resistance voltage reduction circuit is composed in parallel by decompression capacitor and bleeder resistance, current rectifying and wave filtering circuit is by bridge rectifier, electrolytic capacitor filter and filter capacitor form, voltage stabilizing circuit adopts voltage-stabiliser tube, wherein, the positive pole of decompression capacitor connects the live wire end of 220V alternating current, negative pole connects the input of bridge rectifier, the output of bridge rectifier connects the positive pole of electrolytic capacitor filter, the minus earth of electrolytic capacitor filter, filter capacitor is connected in parallel on electrolytic capacitor filter two ends, the negative pole of voltage-stabiliser tube connects the positive pole of electrolytic capacitor filter, the plus earth of voltage-stabiliser tube.
Further, between the live wire hole of outlet and ground wire hole, be connected with electric leakage experimental circuit, this electric leakage experimental circuit is composed in series by push-button switch and leak resistance.In the time pressing the button switch, electric-leakage detection circuit sends electric leakage signal, and power-off executive circuit cuts off current supply circuit; Therefore, can play the effect that checks this earth leakage protective socket.
Its Leakage Protective Rule is as follows:
When household electrical appliance are without when electric leakage, the casing insulation of household electrical appliance is good, household electrical appliance access this earth leakage protective socket, show that between outlet live wire hole and ground wire hole, insulation well (is equivalent to push-button switch in off-state, between live wire hole and ground wire hole, be insulation resistance infinity), detection of electrical leakage module is exported without electric leakage signal, and power-off executive circuit is failure to actuate, and outlet is household electrical appliance normal power supply; In the time that household electrical appliance leak electricity, the casing insulation of household electrical appliance is damaged, showing between the live wire hole of outlet and ground wire hole exists leak resistance (to be equivalent to push-button switch in on-state, voltage on live wire is added to the ground wire hole of outlet by leak resistance), detection of electrical leakage module output electric leakage signal is to power-off Executive Module, and power-off Executive Module cuts off current supply circuit and sends sound and light alarm.After leak current fault is got rid of, detection of electrical leakage module is exported without electric leakage signal, and after delay time, power-off executive circuit automatically resets, and chimes of doom stops.
The present invention can send sound and light alarm and cut off the electricity supply in the time that household electrical appliance leak electricity, in the time causing power-off due to household electrical appliance electric leakage, can hear chimes of doom, if household electrical appliance power-off, and there is no chimes of doom, illustrate that grid power blackout or fuse are out of joint, can check fuse by emphasis, facilitated user to discharge fault; Adopt the use that combines of photoelectrical coupler, 555 timers and relay, socket circuit is simple in structure, earth leakage protective reliability is high, and long service life and cost of manufacture are low.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the circuit theory diagrams of power module in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Household appliance leakage protection socket as shown in Figure 1 and Figure 2, comprise outlet CZ1 and the earth leakage protective device being connected with outlet CZ1, earth leakage protective device comprises detection of electrical leakage module, power-off Executive Module and the power module of DC power supply VCC is provided to power-off Executive Module; Power module comprises capacitance-resistance voltage reduction circuit, current rectifying and wave filtering circuit and voltage stabilizing circuit, capacitance-resistance voltage reduction circuit is composed in parallel by decompression capacitor C1 and bleeder resistance R1, current rectifying and wave filtering circuit is made up of bridge rectifier VD1, electrolytic capacitor filter C2 and filter capacitor C4, and voltage stabilizing circuit adopts voltage-stabiliser tube D1; Detection of electrical leakage module is made up of rectifier diode D2, the first current-limiting resistance R4 and photoelectrical coupler U2; Power-off Executive Module comprises circuits for triggering, executive circuit and warning circuit, circuits for triggering are made up of 555 timer U1, pull-up resistor R5, timing resistor R2, timing capacitor C3 and anti-interference capacitor C5, executive circuit is made up of the coil of relay K, normally-closed contact K-1 and the sustained diode 3 of relay K, and warning circuit is made up of the second current-limiting resistance R6, triode Q1, loud speaker LS1, the 3rd current-limiting resistance R7 and red light emitting diodes DS1.
Wherein, the positive pole of decompression capacitor C1 meets the live wire end L of 220V alternating current, negative pole connects input one end of bridge rectifier VD1, the zero line side N of another termination of the input of bridge rectifier VD1 220V alternating current, the positive pole of the output one termination electrolytic capacitor filter C2 of bridge rectifier VD1, negative pole the ground connection of another termination electrolytic capacitor filter of the output of bridge rectifier VD1 C2, filter capacitor C4 is connected in parallel on electrolytic capacitor filter C2 two ends, the negative pole of voltage-stabiliser tube D1 connects the positive pole of electrolytic capacitor filter C2, the plus earth of voltage-stabiliser tube D1, the positive pole of rectifier diode D2 connects the ground wire hole of outlet CZ1, negative pole connects one end of the first current-limiting resistance R4, the positive pole of the light-emitting diode of another termination photoelectrical coupler U2 of the first current-limiting resistance R4, the negative pole of the light-emitting diode of photoelectrical coupler U2 meets the zero line side N of 220V alternating current, the collector electrode of the phototriode of photoelectrical coupler U2 connects 2 pin of 555 timer U1, and connect the one end of drawing resistance R 5, another termination DC power supply VCC of pull-up resistor R5, the grounded emitter of the phototriode of photoelectrical coupler U2, 6 of 555 timer U1, 7 pin connect one end of timing resistor R2, another termination DC power supply VCC of timing resistor R2, 6 of 555 timer U1, 7 pin connect the positive pole that also meets timing capacitor C3, the minus earth of timing capacitor C3, 4 of 555 timer U1, 8 pin meet DC power supply VCC, 1 pin ground connection, 5 pin connect one end of anti-interference capacitor C5, the other end ground connection of anti-interference capacitor C5, 3 pin of 555 timer U1 connect coil one end of relay K, the coil other end ground connection of relay K, normally-closed contact K-1 one end of relay K meets the live wire end L of 220V alternating current by fuse F1, the live wire hole of another termination outlet CZ1, the null line hole of outlet CZ1 meets the zero line side N of 220V alternating current, the ground wire hole earth connection of outlet CZ1, the negative pole of sustained diode 3 connects 3 pin of 555 timer U1, plus earth, 3 pin of termination 555 timer U1 of the 3rd current-limiting resistance R7, the positive pole of another termination red light emitting diodes DS1, the minus earth of red light emitting diodes DS1, 3 pin of termination 555 timer U1 of the second current-limiting resistance R6, the base stage of another termination triode Q1, the grounded emitter of triode Q1, collector electrode connects one end of loud speaker LS1, another termination DC power supply VCC of loud speaker LS1.
Between the live wire hole of outlet CZ1 and ground wire hole, be connected with electric leakage experimental circuit, this electric leakage experimental circuit is composed in series by push-button switch S1 and leak resistance R3.
Its operation principle is as follows:
When household electrical appliance are without when electric leakage, the casing insulation of household electrical appliance is good, household electrical appliance access this earth leakage protective socket, show that between the live wire hole of outlet CZ1 and ground wire hole, insulation is good, be equivalent to push-button switch S1 in off-state, between live wire hole and ground wire hole, it is insulation resistance infinity, no current in the ground wire hole of outlet CZ1, photoelectrical coupler U2 not electric, export without electric leakage signal, 2 pin of 555 timer U1 are due to the high level that act as of pull-up resistor R5, 3 pin output low levels, not conducting of red light emitting diodes DS1, red light emitting diodes DS1 keeps extinguishing, triode Q1 cut-off, in loud speaker LS1, no current flows through, not sounding of loud speaker LS1, no current in the coil of relay K, the normally-closed contact K-1 of relay K is failure to actuate, it is household electrical appliance power supplies that outlet CZ1 obtains 220V alternating current by the normally-closed contact K-1 of relay K.
In the time that household electrical appliance leak electricity, the casing insulation of household electrical appliance is damaged, show between the live wire hole of outlet CZ1 and ground wire hole and have leak resistance, be equivalent to push-button switch S1 in on-state, voltage on live wire is added to the ground wire hole of outlet CZ1 by leak resistance R3, through rectifier diode D2 rectification, after the first Current Limiting Diodes R4 dividing potential drop current limliting, the light-emitting diode conducting of photoelectrical coupler U2 is luminous, the phototriode of photoelectrical coupler U2 is connected, output electric leakage signal, 2 pin of 555 timer U1 become low level, 3 pin output high level, red light emitting diodes DS1 conducting, red light emitting diodes DS1 lights, triode Q1 conducting, in loud speaker LS1, there is electric current to flow through, loud speaker LS1 sounding, form sound and light alarm, in the coil of relay K, there is electric current to flow through simultaneously, relay K obtains electric adhesive, the normally-closed contact K-1 action of relay K, the live wire hole of outlet CZ1 be cut off being connected of live wire end L of 220V alternating current, outlet CZ1 dead electricity, it can not be household electrical appliance power supply.After leak current fault is got rid of, no current in the ground wire hole of outlet CZ1, photoelectrical coupler U2 exports without electric leakage signal, after delay time (this delay time can be adjusted by timing resistor R2 and timing capacitor C3), red light emitting diodes DS1 extinguishes, and loud speaker LS1 stops sounding, report to the police and stop, relay K dead electricity discharges, and the live wire end L of the live wire hole of outlet CZ1 and 220V alternating current recovers to connect by the normally-closed contact K-1 of relay K, is household electrical appliance power supply.
Claims (3)
1. a Household appliance leakage protection socket; comprise outlet (CZ1) and the earth leakage protective device being connected with outlet (CZ1); described earth leakage protective device comprises detection of electrical leakage module, power-off Executive Module and the power module of DC power supply VCC is provided to power-off Executive Module, it is characterized in that:
Detection of electrical leakage module is by rectifier diode (D2), the first current-limiting resistance (R4) and photoelectrical coupler (U2) composition, power-off Executive Module comprises circuits for triggering, executive circuit and warning circuit, circuits for triggering are by 555 timers (U1), pull-up resistor (R5), timing resistor (R2), timing capacitor (C3) and anti-interference capacitor (C5) composition, executive circuit is by the coil of relay (K), the normally-closed contact (K-1) of relay (K) and fly-wheel diode (D3) composition, warning circuit is by the second current-limiting resistance (R6), triode (Q1), loud speaker (LS1), the 3rd current-limiting resistance (R7) and red light emitting diodes (DS1) composition,
Wherein, the positive pole of rectifier diode (D2) connects the ground wire hole of outlet (CZ1), negative pole connects the positive pole of the light-emitting diode of photoelectrical coupler (U2) by the first current-limiting resistance (R4), the negative pole of the light-emitting diode of photoelectrical coupler (U2) connects the zero line side (N) of 220V alternating current, the collector electrode of the phototriode of photoelectrical coupler (U2) connects 2 pin of 555 timers (U1), and meet DC power supply VCC by pull-up resistor (R5), the grounded emitter of the phototriode of photoelectrical coupler (U2), 6 of 555 timers (U1), 7 pin meet DC power supply VCC by timing resistor (R2), by timing capacitor (C3) ground connection, 4 of 555 timers (U1), 8 pin meet DC power supply VCC, 1 pin ground connection, 5 pin are by anti-interference capacitor (C5) ground connection, 3 pin of 555 timers (U1) are succeeded coil one end of electrical equipment (K), the coil other end ground connection of relay (K), the live wire end (L) of normally-closed contact (K-1) termination 220V alternating current of relay (K), the live wire hole of another termination outlet (CZ1), the null line hole of outlet (CZ1) connects the zero line side (N) of 220V alternating current, the negative pole of fly-wheel diode (D3) connects 3 pin of 555 timers (U1), plus earth, the positive pole of red light emitting diodes (DS1) connects 3 pin of 555 timers (U1) by the 3rd current-limiting resistance (R7), minus earth, the base stage of triode (Q1) connects 3 pin of 555 timers (U1) by the second current-limiting resistance (R6), grounded emitter, collector electrode connects one end of loud speaker (LS1), another termination DC power supply VCC of loud speaker (LS1).
2. Household appliance leakage protection socket according to claim 1, it is characterized in that: described power module comprises capacitance-resistance voltage reduction circuit, current rectifying and wave filtering circuit and voltage stabilizing circuit, capacitance-resistance voltage reduction circuit is composed in parallel by decompression capacitor (C1) and bleeder resistance (R1), current rectifying and wave filtering circuit is by bridge rectifier (VD1), electrolytic capacitor filter (C2) and filter capacitor (C4) form, voltage stabilizing circuit adopts voltage-stabiliser tube (D1), wherein, the positive pole of decompression capacitor (C1) connects the live wire end (L) of 220V alternating current, negative pole connects the input of bridge rectifier (VD1), the output of bridge rectifier (VD1) connects the positive pole of electrolytic capacitor filter (C2), the minus earth of electrolytic capacitor filter (C2), filter capacitor (C4) is connected in parallel on electrolytic capacitor filter (C2) two ends, the negative pole of voltage-stabiliser tube (D1) connects the positive pole of electrolytic capacitor filter (C2), the plus earth of voltage-stabiliser tube (D1).
3. Household appliance leakage protection socket according to claim 1 and 2; it is characterized in that: between the live wire hole of outlet (CZ1) and ground wire hole, be connected with electric leakage experimental circuit, this electric leakage experimental circuit is composed in series by push-button switch (S1) and leak resistance (R3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210468224.6A CN103825146A (en) | 2012-11-19 | 2012-11-19 | Household electric appliance electric leakage protection socket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210468224.6A CN103825146A (en) | 2012-11-19 | 2012-11-19 | Household electric appliance electric leakage protection socket |
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| CN103825146A true CN103825146A (en) | 2014-05-28 |
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| CN201210468224.6A Pending CN103825146A (en) | 2012-11-19 | 2012-11-19 | Household electric appliance electric leakage protection socket |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201647A (en) * | 2014-09-01 | 2014-12-10 | 浙江苏泊尔家电制造有限公司 | Appliance outer casing leakage protection circuit and method |
| CN105552664A (en) * | 2015-12-21 | 2016-05-04 | 天津市九鼎云图智能数据技术有限公司 | Socket capable of preventing short-circuit fault in encountering water |
| CN106799972A (en) * | 2017-02-28 | 2017-06-06 | 深圳巴斯巴科技发展有限公司 | A kind of charging electric vehicle box |
| CN107319930A (en) * | 2017-02-27 | 2017-11-07 | 广州凯柔进出口贸易有限公司 | A kind of kettle teapot structure of protection against electric shock |
| CN108206686A (en) * | 2018-01-19 | 2018-06-26 | 国网宁夏电力有限公司固原供电公司 | Socket delay power-failure alarming device |
| CN108459227A (en) * | 2017-02-21 | 2018-08-28 | 台达电子企业管理（上海）有限公司 | Ground line detection circuit |
| CN109462208A (en) * | 2018-12-28 | 2019-03-12 | 韦明肯 | A kind of electrical shock circuit breaker design |
| CN113075576A (en) * | 2019-12-17 | 2021-07-06 | 张峻浩 | Dedicated test fixture of power module |
| CN113125995A (en) * | 2021-02-26 | 2021-07-16 | 青岛鼎信通讯股份有限公司 | Passive alarm circuit that cooperation collection terminal table case electric leakage monitoring was used |
| CN114512960A (en) * | 2022-04-01 | 2022-05-17 | 余新景 | Zero-live wire reverse connection automatic switching circuit of leakage human body protection safety device |
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2012
- 2012-11-19 CN CN201210468224.6A patent/CN103825146A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201647B (en) * | 2014-09-01 | 2017-06-06 | 浙江苏泊尔家电制造有限公司 | Electric appliance casing leakage protection circuit and method |
| CN104201647A (en) * | 2014-09-01 | 2014-12-10 | 浙江苏泊尔家电制造有限公司 | Appliance outer casing leakage protection circuit and method |
| CN105552664A (en) * | 2015-12-21 | 2016-05-04 | 天津市九鼎云图智能数据技术有限公司 | Socket capable of preventing short-circuit fault in encountering water |
| CN108459227A (en) * | 2017-02-21 | 2018-08-28 | 台达电子企业管理（上海）有限公司 | Ground line detection circuit |
| US10627454B2 (en) | 2017-02-21 | 2020-04-21 | Delta Electronics (Shanghai) Co., Ltd | Grounding wire detection circuit |
| CN107319930A (en) * | 2017-02-27 | 2017-11-07 | 广州凯柔进出口贸易有限公司 | A kind of kettle teapot structure of protection against electric shock |
| CN106799972A (en) * | 2017-02-28 | 2017-06-06 | 深圳巴斯巴科技发展有限公司 | A kind of charging electric vehicle box |
| CN108206686A (en) * | 2018-01-19 | 2018-06-26 | 国网宁夏电力有限公司固原供电公司 | Socket delay power-failure alarming device |
| CN108206686B (en) * | 2018-01-19 | 2024-04-02 | 国网宁夏电力有限公司固原供电公司 | Socket delay power failure alarm device |
| CN109462208A (en) * | 2018-12-28 | 2019-03-12 | 韦明肯 | A kind of electrical shock circuit breaker design |
| CN113075576A (en) * | 2019-12-17 | 2021-07-06 | 张峻浩 | Dedicated test fixture of power module |
| CN113125995A (en) * | 2021-02-26 | 2021-07-16 | 青岛鼎信通讯股份有限公司 | Passive alarm circuit that cooperation collection terminal table case electric leakage monitoring was used |
| CN114512960A (en) * | 2022-04-01 | 2022-05-17 | 余新景 | Zero-live wire reverse connection automatic switching circuit of leakage human body protection safety device |
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Application publication date: 20140528 |