CN203850562U

CN203850562U - Electric-leakage reminding device for electronic equipment

Info

Publication number: CN203850562U
Application number: CN201320869011.4U
Authority: CN
Inventors: 黄月华
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-26
Filing date: 2013-12-26
Publication date: 2014-09-24
Anticipated expiration: 2023-12-26

Abstract

The utility model relates to an electric-leakage reminding device for electronic equipment, and the device is characterized in that the device comprises a 220V alternating-current power supply, a three-hole power socket CZ, an electric leakage sampling and rectification circuit, and an audio oscillator circuit; the electric leakage sampling and rectification circuit consists of a resistor R1 and a silicon rectifier diode D1; in the audio oscillator circuit, the type of CMOS six-inverter IC1 is CD4069; a live-wire terminal L of the three-hole power socket CZ is connected with a live wire of the 220V alternating-current power supply; the zero line terminal N of the three-hole power socket CZ is connected with the zero line of the 220V alternating-current power supply; and the protection ground line terminal E of the three-hole power socket CZ is connected with a protection ground line. The device provided by the utility model is simple in circuit structure and is higher in device sensitivity. The device can be used for timely finding the slight electric leakage of household appliances or the electric equipment, can effectively prevent the electric shock accidents and large-area power failures from happening frequently, and truly achieves precaution.

Description

Electronic equipment electric leakage alarm set

Technical field

The utility model belongs to earth leakage protective and power technique fields, is about a kind of electronic equipment electric leakage alarm set.

Background technology

Conventional earth leakage protective device can be divided into 3 types of electric leakage protection relay, earth leakage circuit-breaker and earth leakage protective sockets by its architectural feature, defencive function.

1. electric leakage protection relay refers to the function having leakage current test and judgement, and does not have the earth leakage protective device that cuts off and connect major loop function.It coordinates with the automatic switch of large electric current, as total protection of low voltage electric network or the electric leakage of trunk roads or insulation monitoring protection.When major loop has leakage current, because the separated release of auxiliary contact and major loop switch is connected into loop.Therefore, auxiliary contact is connected separated release and is disconnected air switch, A.C. contactor etc., makes its tripping operation, cuts off trunk roads.

2. earth leakage circuit-breaker; it is can be switched on or switched off main circuit the same with other circuit breaker not only, and have the function to leakage current test and judgement, while there is electric leakage or insulation breakdown in major loop; earth leakage circuit-breaker can, according to judged result, be switched on or switched off main circuit.At present, the earth leakage circuit-breaker of this form is most widely used.

3. earth leakage protective socket refers to the supply socket to leakage current test and judgement energy cut-off loop.Its rated current is generally below 20A, and residual operating current 6～30mA, because sensitivity is compared with places such as the high protection that is usually used in hand held electric tool and mobile electrical devices and family, laboratory, office, schools.

In order to prevent the electric leakage that probability is extremely low, cause person electric shock injury or cause frequent power failure, and affect, people are normal to produce or life.In order to solve earth leakage protective device because of realistic problems such as the frequency of household electrical appliance or electronic equipment electric leakage is moving, trippings, electronic equipment electric leakage alarm set described in the utility model has that circuit structure is simple, device sensitivity is higher.It can find household electrical appliance or the slight leaky of electronic equipment in time, and that circuit has is simple in structure, device sensitivity is higher, can effectively prevent the frequent generation of the large area loss of power accident, really accomplishes to prevent trouble before it happens.

Below describe electronic equipment described in the utility model electric leakage alarm set related relevant technologies content in implementation process in detail.

Utility model content

Goal of the invention and beneficial effect: in order to prevent the electric leakage that probability is extremely low, cause person electric shock injury or cause frequent power failure, and affect, people are normal to produce or life.In order to solve earth leakage protective device because of realistic problems such as the frequency of household electrical appliance or electronic equipment electric leakage is moving, trippings, electronic equipment electric leakage alarm set described in the utility model has that circuit structure is simple, device sensitivity is higher.It can find household electrical appliance or the slight leaky of electronic equipment in time, and that circuit has is simple in structure, device sensitivity is higher, can effectively prevent the frequent generation of the large area loss of power accident, really accomplishes to prevent trouble before it happens.Electronic equipment electric leakage alarm set can directly combine and pack in supply socket, and the electric leakage that is applicable to household electrical appliance or electronic equipment is reminded.

Circuit working principle: it is CD4069 that the circuit of electronic equipment electric leakage alarm set has been used a slice CMOS hex inverter IC1(model) make, in embodiment circuit, only used two inverters wherein.By two inverters, resistance R 2, piezoelectric ceramic piece HA, form audio frequency oscillator circuit, at ordinary times because absence of audio electric current passes through not sounding of piezoelectric ceramic piece HA.When the electronic equipment of body leakage or electrical equipment insert three-hole power socket CZ; leakage current from the live wire of 220V alternating current through electronic equipment or electric appliance casing the protection ground wire terminal E to three-hole power socket CZ; through alarm set, get back to again the zero line formation loop of 220V alternating current; leakage current is after resistance R 1 step-down and silicon rectifier diode D1 rectification; for CMOS hex inverter, IC1 provides working power, and tone currents makes piezoelectric ceramic piece HA sounding.The leakage alarm electric current of this alarm set is less than 0.3mA.

Technical scheme: electronic equipment electric leakage alarm set, it comprises 220V alternating current, three-hole power socket CZ, electric leakage sampling and rectification circuit, audio frequency oscillator circuit, it is characterized in that:

Electric leakage sampling and rectification circuit: it is comprised of resistance R 1, silicon rectifier diode D1, the positive pole of silicon rectifier diode D1 meets the protection ground wire terminal E of three-hole power socket CZ by resistance R 1, the negative pole of silicon rectifier diode D1 connects the 14th pin of CMOS hex inverter IC1;

Audio frequency oscillator circuit: the model that CMOS hex inverter IC1 selects is CD4069, the 1st pin of CMOS hex inverter IC1 and the 7th pin meet the zero terminal N of three-hole power socket CZ, the 2nd pin of CMOS hex inverter IC1 and the 3rd pin meet the zero terminal N of three-hole power socket CZ by resistance R 2, the 4th pin of CMOS hex inverter IC1 meets the zero terminal N of three-hole power socket CZ by piezoelectric ceramic piece HA;

The fire line terminal L of three-hole power socket CZ connects the live wire of 220V alternating current, and the zero terminal N of three-hole power socket CZ connects the zero line of 220V alternating current, and the protection ground wire terminal E of three-hole power socket CZ connects protection ground wire.

Accompanying drawing explanation

Accompanying drawing is embodiment circuit working schematic diagram of electronic equipment electric leakage alarm set that the utility model provides; E in Figure of description is the protection ground wire terminal of three-hole power socket CZ.

Embodiment

According to circuit working schematic diagram and the accompanying drawing explanation of electronic equipment electric leakage alarm set shown in the drawings, and according to annexation between components and parts in the each several part circuit described in utility model content, and the components and parts technical parameter described in execution mode requires and circuit production main points are implemented to realize the utility model, below in conjunction with embodiment, the utility model correlation technique is further described.

The selection of components and parts and technical parameter thereof

IC1 is CMOS hex inverter, and the integrated circuit model of selecting is CD4069;

D1 is silicon rectifier diode, requires its withstand voltage >=100V, and proposed model is 1N4002;

Resistance is all used metalfilmresistor, and its power is 1/4W, and the resistance of resistance R 1 is 68K Ω, and the resistance of resistance R 2 is 47K Ω;

HA is piezoelectric ceramic piece, the piezoelectric ceramic piece of recommendation diameter ￠ 25mm;

CZ is three-hole power socket, should use single-phase 220V alternating current three-hole power socket.

Circuit production main points and circuit debugging

Electronic equipment electric leakage alarm set can directly combine and pack in supply socket, and the electric leakage that is applicable to household electrical appliance or electronic equipment is reminded;

Because of the circuit structure of electronic equipment electric leakage alarm set fairly simple, as long as the electronic devices and components performance of generally selecting is intact, and the components and parts annexation in accompanying drawing is welded to specifications, physical connection line and welding quality are after careful inspection is correct, circuit of the present utility model does not need to carry out any debugging substantially, connects 220V AC power and can normally work;

When circuit debugging; an available power is that 1W, resistance are 10K Ω resistance; the live wire end L of one termination 220V alternating current of 10K Ω resistance; the protection ground wire E of another termination supply socket CZ of 10K Ω resistance carries out analog leakance test, and at this moment electronic equipment electric leakage alarm set should be sounded a buzzer immediately.

Claims

1. an electronic equipment electric leakage alarm set, it comprises 220V alternating current, three-hole power socket CZ, electric leakage sampling and rectification circuit, audio frequency oscillator circuit, it is characterized in that:

Described electric leakage sampling and rectification circuit are comprised of resistance R 1, silicon rectifier diode D1, the positive pole of silicon rectifier diode D1 meets the protection ground wire terminal E of three-hole power socket CZ by resistance R 1, the negative pole of silicon rectifier diode D1 connects the 14th pin of CMOS hex inverter IC1;

In described audio frequency oscillator circuit, the model that CMOS hex inverter IC1 selects is CD4069, the 1st pin of CMOS hex inverter IC1 and the 7th pin meet the zero terminal N of three-hole power socket CZ, the 2nd pin of CMOS hex inverter IC1 and the 3rd pin meet the zero terminal N of three-hole power socket CZ by resistance R 2, the 4th pin of CMOS hex inverter IC1 meets the zero terminal N of three-hole power socket CZ by piezoelectric ceramic piece HA;

The fire line terminal L of described three-hole power socket CZ connects the live wire of 220V alternating current, and the zero terminal N of three-hole power socket CZ connects the zero line of 220V alternating current, and the protection ground wire terminal E of three-hole power socket CZ connects protection ground wire.