CN2609253Y

CN2609253Y - Over-voltage lightning-protection safety protector

Info

Publication number: CN2609253Y
Application number: CN 03227279
Authority: CN
Inventors: 唐剑军
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-04-02
Filing date: 2003-04-02
Publication date: 2004-03-31
Anticipated expiration: 2013-04-02

Abstract

The utility model relates to an over-voltage lightning-protection safety protector. The utility model is characterized in that the over-voltage lightning-protection safety protector is composed of a relay (JK), a controlled silicon (BT), a voltage-sensitive resistor (ZNR), a discharge tube (N) and a fuse (F) which are connected with each other, wherein the relay (JK) is a hand-operated double-contact relay which is connected with a switch of the input terminal of the circuit; the relay (JK) and the controlled silicon (BT) are connected with the voltage-sensitive resistor (ZNR) in parallel after the relay (JK) and the controlled silicon (BT) are connected in series.; the relay (JK) and the controlled silicon (BT) are connected with the discharge tube (N) and the fuse (F) in parallel simultaneously; the discharge tube (N) is mutually connected with the fuse (F) in series. The utility model can cut off an external power supply of an electric appliance through a protecting circuit arranged at the input terminal of the electric appliance when the input voltage exceeds the rated voltage or is struck by lightning, which avoids the electric appliance being damaged and guarantees the safety of the electric appliance. The utility model has the advantages of simple structure, easy implementation and low cost.

Description

Overvoltage lightning protection safety guard

Technical field:

The utility model relates to a kind of Protector for electric appliances, is specifically related to a kind of electrical equipment of avoiding in overvoltage or the safety guard that damages under the situation of thunderbolt is arranged.

Background technology:

Along with development of modern science and technology, the progress of society, electric equipment increases considerably, especially the development of household electrical appliance has brought improving constantly of living standards of the people, as computer, refrigerator, air-conditioning, television set etc., almost entered every household, for the unusual fluctuations of avoiding voltage bring influence to electrical equipment, many electrical equipment adopt a pressurizer to join with it when linking to each other with external voltage mostly.But, because pressurizer can only play the effect of voltage stabilizing among a small circle, when electrical network breaks down or the thunderstorm lightning occurs, because the input of the supply voltage of most of electrical equipment is limited, in case when surpassing rated voltage, just might suffer damage in various degree.

The utility model content:

Electrical equipment can be avoided being damaged when technical problem to be solved in the utility model surpassed rated voltage or thunderbolt is arranged when input voltage.

The utility model is to solve the problems of the technologies described above by following technical scheme.It is characterized in that it is by relay, controllable silicon, piezo-resistance, discharge tube and fuse interconnect composition, described relay is the manual type double-contact relay, link to each other with the circuit input end switch, relay and controllable silicon are connected in series back and piezo-resistance mutually and connect, and simultaneously in parallel with discharge tube and fuse, discharge tube and fuse are connected in series mutually.

The utility model can make electrical equipment surpass rated voltage or be arranged and the external power supply disconnection when thunderbolt at its input voltage by at the electrical equipment input one protective circuit being set, and avoids electrical equipment impaired, has guaranteed the safety in utilization of electrical equipment.The utility model is simple in structure, realizes easily, and is cheap for manufacturing cost, has market using value comparatively widely.

Description of drawings:

Fig. 1 is the utility model external connection electrical apparatus box Application Example;

Fig. 2 is the utility model circuit diagram.

Among the figure;

The 1-box body; 2-relay knob; The A-input indicator;

The B-output indicator; Jk-manual type double-contact relay; The BT-controllable silicon;

The D-rectifier diode; The ZNR-piezo-resistance; R ₁-resistance;

R ₂-resistance; R ₃-resistance; The N-discharge tube;

U ₁-input; U ₂-output; The F-fuse;

The K-switch.

Embodiment:

As shown in Figure 2, the utility model is by relay J k, controllable silicon BT, and components and parts such as piezo-resistance ZNR, discharge tube N and fuse F interconnect built-up circuit, and this circuit is established input and output, wherein input U ₁Join output U with external power supply ₂Circuit closer input, described relay J k are the manual type double-contact relay, link to each other with the circuit input end switch, if starting relay button 2, output U ₂Output voltage is just arranged, and this relay J k is connected in series with controllable silicon BT, piezo-resistance ZNR and resistance R ₁, R ₂Mutually the serial connection back is in parallel with relay J k and controllable silicon BT, joins afterwards in parallelly with discharge tube N and fuse F with rectifier diode D again, and discharge tube N and fuse F are connected in series mutually.

As electrical network input voltage U ₁Too high, when its numerical value surpassed the setting voltage of piezo-resistance ZNR, piezo-resistance ZNR is conducting immediately, resistance R ₁, R ₂Conducting, rectifier diode D is conducting immediately also, resistance R ₁, R ₂Between dividing potential drop trigger controllable silicon BT conducting, thereby start double-contact relay Jk switch opens, make input U ₁Disconnect with electrical equipment between be connected, thereby prevent of the impact of higher input voltage to electrical equipment.And when the thunderstorm lightning enters electrical network and its line voltage and surpasses the setting voltage of discharge tube N, the instantaneous generation heavy-current discharge of discharge tube N, fuse F fusing makes double-contact relay Jk switch opens simultaneously, disconnects input U ₁With being connected between the circuit, thus disconnect with electrical equipment between be connected, protection electrical equipment exempts from the moment heavy current impact that produced of lightening pulse.

As shown in Figure 2, the utility model is also in piezo-resistance ZNR two ends parallel connection one resistance R ₃, R ₃Connect with K switch, when K switch is closed, can detect entire circuit, play the deenergization effect simultaneously.

Fig. 1 has showed an Application Example of the present utility model, each components and parts of Fig. 2 circuit can be interconnected in the box body shown in Figure 11, wherein input indicator A, output indicator B, relay knob 2, fuse F, K switch can be loaded on box body 1 panel, as an electrical equipment box socket, appliance plug inserts in the jack of offering on it and gets final product.Also can in electrical equipment production, circuit be directly connected in the circuit of each electrical equipment own, as a part of its circuit, very convenient.

Claims

1, a kind of overvoltage lightning protection safety guard; it is characterized in that it is by relay (JK); controllable silicon (BT); piezo-resistance (ZNR), discharge tube (N) and fuse (F) interconnect composition; described relay (JK) is the manual type double-contact relay, links to each other with the circuit input end switch, and relay (JK) and controllable silicon (BT) are connected in series back and piezo-resistance (ZNR) mutually and connect; simultaneously in parallel with discharge tube (N) and fuse (F), discharge tube (N) and fuse (F) be serial connection mutually.