CN2385448Y

CN2385448Y - Automatic safety socket for electric equipment

Info

Publication number: CN2385448Y
Application number: CN 99236724
Authority: CN
Inventors: 唐国伟; 黄伟杰
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-20
Filing date: 1999-07-20
Publication date: 2000-06-28
Anticipated expiration: 2009-07-20

Abstract

The utility model relates to an automatic safety socket for electric equipment, which is matched with a water storage electric water heater and comprises an AC power plug, an AC power socket and a DC power circuit providing DC working volt for the following circuits. The utility model is characterized in that the automatic safety socket also comprises an infrared induced circuit, an electric leakage detecting switching circuit which can cut off the AC power supply as long as detects the electric leakage, and a relay switching circuit which can receive the output signal from the infrared induced circuit to control the connection and the disconnection of the AC power supply. The utility model has the advantages of high safety in use, simple structure, etc.

Description

Electrical equipment automatic safe socket

The utility model relates to a kind of electrical equipment automatic safe socket, relates in particular to a kind of supporting electrical equipment automatic safe socket of storage water heater that is.

Existing water-storage electric heater all exists in use because of electric leakage and causes the potential safety hazard of getting an electric shock; though the water-storage electric heater that has has earth leakage circuit-breaker, because the malfunctioning generation that all may cause electric shock accidents of some mistake installed and used or earth leakage circuit-breaker.Existing AC Power supply socket when human body is walked close to, all can not be cut off the power supply automatically.

The purpose of this utility model provides a kind of safe and reliable, the electrical equipment automatic safe socket that can cut off the power supply automatically when human body is walked close to.

In order to achieve the above object, the utility model is to realize like this, comprise that ac power plug, AC Power supply socket reach the DC power supply circuit that direct-current working volts are provided for following circuit, it is characterized in that: it also comprises the infrared induction circuit, the one detection of electrical leakage switching circuit that AC power can be disconnected when detecting electric leakage, an output signal that receives the infrared induction circuit removes to control the relay switching circuit that AC power is turn-offed.The infrared induction circuit is made up of infrared sensor P and lens, special-purpose infrared signal processing integrated circuit IC1 and peripheral cell thereof, and peripheral cell comprises resistance R 3-R9, capacitor C 5-C8, capacitor C 10-C14.The detection of electrical leakage switching circuit is made up of leakage current transducer L1, little current trigger one-way SCR BCR, resistance R 2, capacitor C 9 and normally closed relay J1.Relay switching circuit comprises triode T1, T2 and high-power normally closed relay J2; Also comprise triode T3, light-emitting diode D1, resistance R 11 composition power safety indicating devices.This socket is supporting for water-storage electric heater, water-storage electric heater is a kind of water heater of long-term energising work, energising heating when bathing has not had much influences to leaving water temperature, therefore when having a bath power supply is disconnected the generation that just can prevent electric shock accidents.

The utility model compared with prior art has following advantage:

1, use is more safe and reliable;

2, simple in structure.

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Below in conjunction with drawings and Examples the utility model is done further detailed description:

As shown in Figure 1, the utility model is made up of ac power plug (1), AC Power supply socket (6), infrared induction circuit (4), detection of electrical leakage switching circuit (3), relay switching circuit (5) and DC power supply circuit (1) six part.

As shown in Figure 2, relay switching circuit (5) comprises triode T1, T2 and high-power normally closed relay J1; Also comprise triode T3, light-emitting diode D1, resistance R 11 composition power safety indicating devices.Infrared induction circuit (4) is by infrared sensor P and lens, special-purpose infrared signal processing integrated circuit IC1 and peripheral cell resistance R 3-R9 thereof, capacitor C 1-C8, and capacitor C 10-C14 forms; The model of IC1 is W78072.When human body is walked close to, the infrared signal of sending is after infrared sensor P reception and special-purpose infrared signal processing integrated circuit IC1 processing, and by the 11 pin output high level of IC1, triode T1, T2 receive the flat signal of this height and amplify conducting, normally closed relay J2 action, AC Power supply socket (6) outage; In addition, triode T3 also conducting amplifies, and light-emitting diode D1 is luminous, the indication Electrical Safety; Otherwise, when not receiving infrared signal, the 11 pin output low levels of IC1, triode T1, T2, T3 end, and relay J 2 is failure to actuate, and light-emitting diode D1 is not luminous.Detection of electrical leakage switching circuit (3) is by leakage current transducer L1 and little current trigger one-way SCR BCR, and resistance R 2, capacitor C 6 and normally closed relay J1 form; When the electric leakage situation took place, the electric current of inflow leakage current transducer L1 and the electric current of outflow produced an electric leakage signal therefrom with unequal, trigger one-way SCR BCR conducting, and relay J 1 disconnects, the supply socket outage; Otherwise relay J 1 is failure to actuate.DC power supply circuit (1) is made up of rectifier bridge B1, regulator block V1, filter capacitor C1-C4 and resistance R 1; Alternating current provides direct-current working volts to above circuit through rectifier bridge B1, regulator block V1, filter capacitor C1-C4 after rectification, voltage stabilizing, the filtering.

Claims

1, a kind of electrical equipment automatic safe socket, comprise that ac power plug, AC Power supply socket reach the DC power supply circuit that direct-current working volts are provided for following circuit, it is characterized in that: it also comprises infrared induction circuit (4), the one detection of electrical leakage switching circuit (3) that AC power can be disconnected when detecting electric leakage, an output signal that receives infrared induction circuit (4) removes to control the relay switching circuit (5) that AC power is turn-offed.

2, electrical equipment automatic safe socket according to claim 1, it is characterized in that: infrared induction circuit (4) is made up of infrared sensor P and lens, special-purpose infrared signal processing integrated circuit IC1 and peripheral cell thereof, peripheral cell comprises resistance R 3-R9, capacitor C 5-C8, capacitor C 10-C14.

3, electrical equipment automatic safe socket according to claim 1 is characterized in that: detection of electrical leakage switching circuit (3) is made up of leakage current transducer L1, little current trigger one-way SCR BCR, resistance R 2, capacitor C 9 and normally closed relay J1.

4, electrical equipment automatic safe socket according to claim 1 is characterized in that: relay switching circuit (5) comprises triode T1, T2 and high-power normally closed relay J2; Also comprise triode T3, light-emitting diode D1, resistance R 11 composition power safety indicating devices.