CN202495643U

CN202495643U - Alternating current socket with overvoltage protection

Info

Publication number: CN202495643U
Application number: CN 201220068246
Authority: CN
Inventors: 车容俊; 林夏; 罗亚芳
Original assignee: Chengdu Cuopu Technology Co Ltd
Current assignee: Chengdu Cuopu Technology Co Ltd
Priority date: 2012-02-28
Filing date: 2012-02-28
Publication date: 2012-10-17
Anticipated expiration: 2022-02-28

Abstract

The utility model discloses an alternating current socket with overvoltage protection. The alternating current socket comprises a live line wiring terminal, a zero line wiring terminal, a bidirectional controllable silicon, a crystal triode, a resistor, a voltage-regulator tube, a first diode, a potentiometer, a second diode, an electrolytic capacitor and a metal paper capacitor; if the voltage in a power grid rises suddenly and exceeds more than 250V, at this moment, the voltage at an RP sliding end of the potentiometer leads to breakdown and conduction of the voltage-regulator diode; the conduction of the voltage-regulator diode also leads to the conduction of the crystal triode; after the conduction of the crystal triode, the voltage drop from a collector to an emitter is so small that the bidirectional controlled silicon cannot be triggered, which can further leads to cutoff of the bidirectional controllable silicon. Therefore, the electric current for household appliances in the socket is cut off and the household appliances stop operation, such that the purpose of protection is realized. The alternating current socket provided by the utility model is a simple overvoltage protection device; once the voltage exceeds an allowable range, electric current can be automatically cut off; when the voltage returns to be normal, the electric current can be connected automatically. Therefore, the alternating current socket can play a protective role for the household appliances and effectively avoid damage to the household appliances and unnecessary economic losses caused by the damaged household appliances.

Description

AC socket with overvoltage protection

Technical field

The utility model relates to a kind of AC socket, relates in particular to a kind of AC socket with overvoltage protection.

Background technology

When certain reason raises line voltage suddenly; Can make household electrical appliance such as the refrigerator that moving, washing machine, television set, sound equipment, computer suffer damage in various degree; Also can be therefore and breaking out of fire when serious; Cause very big economic loss, existing AC socket does not have over-voltage protecting function.

Summary of the invention

The purpose of the utility model provides a kind of AC socket with overvoltage protection with regard to being in order to address the above problem.

The utility model is realized above-mentioned purpose through following technical scheme:

The utility model comprises firewire binding post, zero line binding post, bidirectional triode thyristor, transistor, resistance, voltage-stabiliser tube, first diode, potentiometer, second diode, electrochemical capacitor and metal paper dielectric capacitance; Said firewire binding post is connected with first end of said bidirectional triode thyristor; Second end of said bidirectional triode thyristor is connected with live wire with first end of first end of the emitter of said transistor, said potentiometer, said electrochemical capacitor, the positive pole of said second diode simultaneously; Said zero line binding post is connected with first end of zero line and said metal paper dielectric capacitance simultaneously; Second end of said metal paper dielectric capacitance is connected with the negative pole of said second diode and the positive pole of said first diode simultaneously; The negative pole of said first diode is connected with second end of second end of said electrochemical capacitor, said potentiometer and first end of said resistance simultaneously; The sliding end of said potentiometer is connected with the negative pole of said voltage-stabiliser tube; The positive pole of said voltage-stabiliser tube is connected with the base stage of said transistor, and the collector electrode of said transistor is connected with second end of said resistance and the control end of said bidirectional triode thyristor simultaneously.

The beneficial effect of the utility model is:

The utility model is a kind of easy overvoltage protection; In case surpassing allowed band, voltage can cut off the power supply automatically; Voltage recovers normally can to connect automatically again, and household electrical appliances are played a protective role, and can effectively avoid the damage of household electrical appliances and causes unnecessary economic loss.

Description of drawings

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

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

As shown in Figure 1: the utility model comprises firewire binding post, zero line binding post, bidirectional triode thyristor VS, transistor VT, resistance R, voltage-stabiliser tube DW, the first diode VD1, potentiometer RP, the second diode VD2, electrochemical capacitor C2 and metal paper dielectric capacitance C1; Said firewire binding post is connected with first end of bidirectional triode thyristor VS; Second end of bidirectional triode thyristor VS is connected with live wire with the emitter of transistor VT, first end of potentiometer RP, first end of electrochemical capacitor C2, the positive pole of the second diode VD2 simultaneously; The zero line binding post is connected with first end of zero line with metal paper dielectric capacitance C1 simultaneously; Second end of metal paper dielectric capacitance C1 is connected with the negative pole of the second diode VD2 and the positive pole of the first diode VD1 simultaneously; The negative pole of the first diode VD1 is connected with second end of electrochemical capacitor C2, second end of potentiometer RP and first end of resistance R simultaneously; The sliding end of potentiometer RP is connected with the negative pole of voltage-stabiliser tube DW; The positive pole of voltage-stabiliser tube DW is connected with the base stage of transistor VT, and the collector electrode of transistor VT is connected with second end of resistance R and the control end of bidirectional triode thyristor VS simultaneously.

As shown in Figure 1: metal paper dielectric capacitance C1 with 220V alternating current step-down current limliting after, by the first diode VD1 and the second diode VD2 rectification, electrochemical capacitor C2 serves as filtering, obtains the direct voltage about 12V.When line voltage just often, voltage stabilizing didoe DW can not breakdown conducting, this moment, transistor VT was in cut-off state, bidirectional triode thyristor VS receives the conducting of voltage triggered face, is inserted in the household electrical appliances energising work among the socket CZ.

If line voltage raises suddenly, surpass 250V, this moment, the voltage at potentiometer RP sliding end just caused voltage stabilizing didoe DW to puncture conducting; After the voltage stabilizing didoe DW conducting, make transistor VT conducting again, after the transistor VT conducting; Its collector electrode is very little to the pressure drop of emitter, is not enough to trigger bidirectional triode thyristor VS, causes bidirectional triode thyristor VS to end again; Therefore the household electrical appliances outage among the socket CZ quits work, thereby has played the purpose of protection.In case line voltage descends, transistor VT ends again, and the collector potential of transistor VT raises, and triggers bidirectional triode thyristor VS conducting again, and household electrical appliances get electric working on.

Claims

1. AC socket with overvoltage protection; It is characterized in that: comprise firewire binding post, zero line binding post, bidirectional triode thyristor, transistor, resistance, voltage-stabiliser tube, first diode, potentiometer, second diode, electrochemical capacitor and metal paper dielectric capacitance; Said firewire binding post is connected with first end of said bidirectional triode thyristor; Second end of said bidirectional triode thyristor is connected with live wire with first end of first end of the emitter of said transistor, said potentiometer, said electrochemical capacitor, the positive pole of said second diode simultaneously; Said zero line binding post is connected with first end of zero line and said metal paper dielectric capacitance simultaneously; Second end of said metal paper dielectric capacitance is connected with the negative pole of said second diode and the positive pole of said first diode simultaneously; The negative pole of said first diode is connected with second end of second end of said electrochemical capacitor, said potentiometer and first end of said resistance simultaneously; The sliding end of said potentiometer is connected with the negative pole of said voltage-stabiliser tube; The positive pole of said voltage-stabiliser tube is connected with the base stage of said transistor, and the collector electrode of said transistor is connected with second end of said resistance and the control end of said bidirectional triode thyristor simultaneously.