CN201750009U

CN201750009U - Household appliance leakage protection socket

Info

Publication number: CN201750009U
Application number: CN2010202099451U
Authority: CN
Inventors: 曹钟林
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-28
Filing date: 2010-05-28
Publication date: 2011-02-16
Anticipated expiration: 2020-05-28

Abstract

The utility model discloses a household appliance leakage protection socket. A leakage protection device which comprises a leakage detection circuit and a leakage execution circuit is arranged in the socket, wherein, the leakage detection circuit is a photoelectric leakage detection circuit and comprises a photoelectric coupler, a resistor and a diode, the input end of the photoelectric coupler is arranged between a ground wire of a socket hole and a zero line of the socket hole and is electrically connected with a diode through the resistor, and the output end of the photoelectric coupler is electrically connected with the leakage execution circuit and controls the motion of the leakage execution circuit; and the leakage execution circuit comprises a unidirectional thyristor, a bidirectional thyristor and a photoelectric coupler, the input end of the photoelectric coupler is electrically connected with the leakage detection circuit through the unidirectional thyristor, and the output end of the photoelectric coupler is electrically connected with a phase line of the socket hole through the bidirectional thyristor. The socket has the characteristics that a photoelectric sensing method is combined with a thyristor controlled method, and the socket has the advantages of long service life, sensitive and reliable operation, simple circuit, low manufacturing cost, and the like.

Description

A kind of household electrical appliance earth leakage protective socket

Technical field

The utility model relates to a kind of socket, especially relates to a kind of earth leakage protective socket.

Background technology

Insulation damages between household electrical appliance phase line and shell causes electric appliance casing (metallic conductor) charged, as human body contact electric appliance casing, as not taking effective protection measure, then the accident of human electric shock might be taken place.For existing many old-fashioned dwelling houses, exist earth leakage protective device or earth leakage protective device damage, no electic protection ground wire or the bad phenomenon of protective earthing are not installed especially,, then will cause personal injury accidents in case get an electric shock.Have various earth leakage protective sockets in the market, whether the principle of these earth leakage protective sockets all is to detect leaking electricity by an electric-leakage detection circuit, when detecting electric leakage, controls coupled electric leakage executive circuit deenergization.But common earth leakage protective socket all adopts electromagnetic type dropout earth leakage protective mode at present, has more mechanical contact, so useful life is short, the earth leakage protective action is unreliable.

The utility model content

The purpose of this utility model provides a kind of effective protection security appliance and useful life is long, the household electrical appliance earth leakage protective socket of reliable in action.

The purpose of this utility model can realize by following scheme:

A kind of household electrical appliance earth leakage protective socket is provided with the earth leakage protective device that comprises electric-leakage detection circuit and electric leakage executive circuit in socket, it is characterized in that: described electric-leakage detection circuit is the photoelectricity electric-leakage detection circuit, comprises photoelectrical coupler, resistance and diode; The input of described photoelectrical coupler is connected with diode electrically by resistance between the zero line electricity of the ground wire of socket aperture and socket aperture; The output of photoelectrical coupler and electric leakage executive circuit are electrically connected and control the action of executive circuit of leaking electricity.

When household electrical appliance do not have electric leakage, insulation between household electrical appliance phase line and the shell is good, household electrical appliance insert this earth leakage protective socket, show that then insulation is good between socket phase line hole and the ground wire hole, power supply phase line voltage is added to the ground wire hole through insulation resistance, above-mentioned photoelectricity electric-leakage detection circuit does not have electric leakage signal and spreads out of, and the electric leakage executive circuit that is connected with this electric-leakage detection circuit is not done action, and socket is the electrical equipment normal power supply; When household electrical appliance leak electricity; insulation damages between household electrical appliance phase line and the shell; household electrical appliance insert this earth leakage protective socket; then show between socket phase line hole and the ground wire hole and have leak resistance; power supply phase line voltage is added to the ground wire hole through leak resistance; this electric-leakage detection circuit is given the electric leakage executive circuit by photoelectric coupler output end output electric leakage signal voltage wherein, and the electric leakage executive circuit cuts off the current supply circuit of socket, thereby plays the earth leakage protective effect.

Electric leakage executive circuit described in the utility model can adopt in the prior art electric leakage executive circuit of electromagnetic type commonly used, and for example circuit breaker etc. also can adopt following scheme, and promptly photoelectric sensing is in conjunction with thyristor controlled scheme:

This electric leakage executive circuit comprises unidirectional thyristor, bidirectional thyristor, photoelectrical coupler; The input of photoelectrical coupler is electrically connected with electric-leakage detection circuit by unidirectional thyristor, and the output of this photoelectrical coupler is electrically connected with the phase line of socket aperture by bidirectional thyristor; When electric leakage takes place when, the electric leakage signal voltage triggered unidirectional thyristor conducting that electric-leakage detection circuit sends, the photoelectrical coupler dead electricity is ended bidirectional thyristor, thereby is cut off the electricity supply.

When this electric leakage executive circuit receives the electric leakage signal voltage of photoelectricity electric-leakage detection circuit transmission, unidirectional thyristor conducting, photoelectrical coupler dead electricity; bidirectional thyristor is ended; supply socket loses electricity mutually, thereby cuts off the current supply circuit of electrical equipment, plays earth leakage protective effect.

Can also in by above-mentioned earth leakage protective device, increase an electric leakage experimental circuit that constitutes by the button and the resistance of series connection; The ground wire and the phase line of socket aperture inserted at these electric leakage experimental circuit two ends respectively; When pressing the button, the photoelectricity electric-leakage detection circuit sends electric leakage signal voltage, and the electric leakage executive circuit cuts off the electric power supply loop; Therefore can play the effect of checking earth leakage protective device.

Compared to existing technology; characteristics of the present utility model are by photoelectric sensing method and SCR control method are combined, and make household electrical appliance earth leakage protective socket of the present utility model have long service life (not having mechanical contact switch), reliable, advantage such as circuit is simple, cost of manufacture is low is active in one's movements.

Description of drawings

Fig. 1 is the circuit theory diagrams of the utility model specific embodiment 1;

Fig. 2 is the circuit theory diagrams of the utility model specific embodiment 2.

Embodiment

Below in conjunction with accompanying drawing the technical solution of the utility model is elaborated:

Embodiment 1,

The circuit of present embodiment as shown in Figure 1, when household electrical appliance do not have electric leakage, insulation between household electrical appliance phase line and the shell is good, household electrical appliance insert this earth leakage protective socket, show that then insulation is good between socket phase line hole and the ground wire hole, power supply phase line voltage is added to socket ground wire hole through insulation resistance, is failure to actuate the not conducting of unidirectional thyristor VS1 triggerless voltage by the electric-leakage detection circuit that diode VD1, photoelectrical coupler U1, resistance R 3, R4, R5 constitute; Alternating current 220V is through resistance R 2, capacitor C 1 step-down, diode VD2 rectification, voltage-stabiliser tube VDW voltage stabilizing, capacitor C 2 filtering, obtain a direct voltage, be added to photoelectrical coupler U2 through current-limiting resistance R6, R8, make bidirectional thyristor VS2 keep conducting, supply socket hole CZ gets the electric mutually electric power supply that is.

When household electrical appliance leak electricity; insulation damages between household electrical appliance phase line and the shell; be to have leak resistance between household electrical appliance phase line and the shell; if household electrical appliance insert earth leakage protective socket hole CZ; power supply phase line voltage is added to the ground wire hole through leak resistance; then by diode VD1; photoelectrical coupler U1; resistance R 3; R4; the electric-leakage detection circuit action that R5 constitutes; send electric leakage signal voltage; trigger unidirectional thyristor VS1; make its turn-on action, photoelectrical coupler U2 dead electricity is ended bidirectional thyristor VS2; supply socket hole CZ loses electricity mutually, thereby cuts off the power supply of electrical equipment.

Embodiment 2,

Present embodiment is compared with embodiment 1, and as shown in Figure 2: the photoelectricity electric-leakage detection circuit is constant, the 6 usefulness direct current relay J of the resistance R in the circuit are replaced, and the indicating circuit that parallel connection is made of resistance R 6, light-emitting diode VD3 series connection on relay J; Remove resistance R 8, R9, R10, photoelectrical coupler U2, bidirectional thyristor VS2 and capacitor C 3 in embodiment 1 circuit, substitute with relay J, be about to electric mutually break-make and realize with relay switch, the photo-electric control of electric leakage executive circuit makes relay control into.

When household electrical appliance leak electricity; insulation damages between household electrical appliance phase line and the shell; be to have leak resistance between household electrical appliance phase line and the shell; if household electrical appliance insert earth leakage protective socket hole CZ; power supply phase line voltage is added to the ground wire hole through leak resistance; then by diode VD1; photoelectrical coupler U1; resistance R 3; R4; the electric-leakage detection circuit action that R5 constitutes; send electric leakage signal voltage; trigger unidirectional thyristor VS1, make its conducting, relay J gets electronic work; relay J normally-closed contact 3; 4 disconnect; supply socket hole CZ loses electricity mutually, thereby cuts off the power supply of electrical equipment, reaches earth leakage protective purpose.

When household electrical appliance did not have electric leakage, light-emitting diode VD3 (redness) extinguished, light-emitting diode VD4 (green) lights; During the household electrical appliance electric leakage, light-emitting diode VD3 (redness) lights, light-emitting diode VD4 (green) extinguishes.Thereby play the effect of indication earth leakage protective socket operating state.

Claims

1. household electrical appliance earth leakage protective socket, in socket, be provided with the earth leakage protective device that comprises electric-leakage detection circuit and electric leakage executive circuit, it is characterized in that: described electric-leakage detection circuit is the photoelectricity electric-leakage detection circuit, comprises photoelectrical coupler, resistance and diode; The input of described photoelectrical coupler is connected with diode electrically by resistance between the zero line electricity of the ground wire of socket aperture and socket aperture; The output of photoelectrical coupler and electric leakage executive circuit are electrically connected and control the action of executive circuit of leaking electricity.

2. household electrical appliance earth leakage protective socket as claimed in claim 1 is characterized in that: described electric leakage executive circuit comprises unidirectional thyristor, bidirectional thyristor, photoelectrical coupler; The input of photoelectrical coupler is electrically connected with electric-leakage detection circuit by unidirectional thyristor, and the output of this photoelectrical coupler is electrically connected with the phase line of socket aperture by bidirectional thyristor; When electric leakage takes place when, the electric leakage signal voltage triggered unidirectional thyristor conducting that electric-leakage detection circuit sends, the photoelectrical coupler dead electricity is ended bidirectional thyristor, thereby is cut off the electricity supply.

3. household electrical appliance earth leakage protective socket as claimed in claim 1 is characterized in that: described electric leakage executive circuit comprises unidirectional thyristor and relay; The input of relay is electrically connected with photoelectric coupler output end in the electric-leakage detection circuit by unidirectional thyristor, and the output loop of relay inserts the current supply circuit of socket.

4. household electrical appliance earth leakage protective socket as claimed in claim 1 is characterized in that: described earth leakage protective device also comprises the electric leakage experimental circuit; This electric leakage experimental circuit is made of the button and the resistance of series connection; The ground wire and the phase line of socket aperture inserted at these electric leakage experimental circuit two ends respectively.