CN2089660U - Power socket for leakage alarm - Google Patents

Abstract

The utility model relates to a power socket for leakage alarm, which can be divided into two kinds of a plug and a socket and can be solely used. The common electronic schematic diagrams of the plug and the socket are as shown in figure, and the utility model comprises an electrical leakage sample, a light emitting indication device, and an audio oscillator. When the socket is used, ground wires do not need to be arranged and a single-phase source needs to be connected for working. When domestic appliances generate electrical leakage, the socket can send out acoustooptical alarm for reminding users to repair domestic appliances and avoiding an electric shock accident. When the plug is used, three lines inside power lines are respectively connected with the power circuit of the domestic appliance and a metallic casing; the plug is inserted into a power socket with two general holes. When domestic appliance generates electric leakage, the plug can instantly send out acoustooptical alarm.

Description

Power socket for leakage alarm

The utility model belongs to the low-voltage electrical apparatus class, is specially to relate to a kind of single phase poaer supply plug and socket with warning function of electric leakage.

Commercially available single-phase three-hole emergency power supply socket all is not with warning function of electric leakage at present, when this class socket is installed, for asking security personnel to act on, press in three jacks of isosceles triangle arrangement at it, the jack electrode on top must connect ground wire, make the metal shell of electrical appliance be in earth potential, with the human body equipotential.When electrical appliance leaked electricity, leakage current flowed into the earth and does not flow into human body by metal shell, ground wire like this, thereby played security personnel's effect.But because socket connected ground wire, so whether electrical appliance have leaky unknown, if leak current fault is heavily to be light? also can't obtain prompting: electrical appliance can damage at this point so in the course of time.Because of it does not possess warning function of electric leakage, so only belong to passive security personnel.In addition, now newly-built high-rise residential building is except that the bottom earth connection is easier to, and other floors are high more inconvenient more, so the user buys the most when mounted earth-free lines of this class Three-hole socket, " security personnel " two words are fallen short of the reality, in case the danger that the electrical appliance electric leakage still can be got an electric shock.

Also have at present commercially available single-phase two utmost points (flat pin or circle pin) attaching plug, its two poles of the earth link to each other with the power unit of electrical appliance in use, and communicate with the phase line and the zero line of single phase poaer supply by common two sockets.So simple structure makes it both not have security personnel's effect, does not have warning function of electric leakage again, is a kind of unsafe low-pressure electronic equipment product, belongs to the example of eliminating.

The purpose of the utility model is to provide power connector leakage-current alarm Three-hole socket and the leakage-current alarm the two poles of the earth plug that can report to the police automatically when electrical appliance leaks electricity.Be that socket or plug keep the electric leakage sampling in all, luminous indication Homeway.com rings warning circuit.It both can exempt the trouble that you install ground wire as for socket, can guarantee your safety utilization of electric power again.In use ground wire need not be installed, as long as common single phase poaer supply is laid line by power supply to be tapped in the socket accordingly and gets final product work on the binding post, the emergency power supply plug of electrical appliance (three cores) inserts in the alarm socket, when electrical appliance generation leak current fault, this socket will send sound and light alarm: promptly neon bulb 10 is luminous, buzzer 23 sends interrupted chimes of doom (Fig. 1), and prompting user maintenance electrical appliance avoids taking place electric shock accidents.It is a kind of renewal product that replaces old product as for plug, during use, is row number in three the end of a thread of power line on this plug that 25,26 wiring is connected in the power circuit of electrical appliance, is row number that 24 wiring is connected on the metal shell of electrical appliance.Then two pin 33(Fig. 1 of this plug) insert in common two supply sockets and just can work.In case leak current fault appears in electrical appliance, it is also as alarm socket: the neon bulb 10 that is contained on the plug will be luminous immediately, and buzzer 23 sends pulsed sound simultaneously and reports to the police, and points out the user which electrical appliance electric leakage particularly, uses very convenient.

Concrete structure of the present utility model and operation principle are provided by following embodiment and accompanying drawing thereof.

Fig. 1 is an electrical schematic diagram of the present utility model.

Fig. 2 is the outline drawing of warning supply socket.

Fig. 3 is the outline drawing of warning attaching plug.

No matter be socket or their shell of the plug plastics of drawing materials, but the end 32, lid 31 injection moldeds, and also available rubber and plastic seals disposable casting forming with internal circuit, so especially, for plug, can increase impact strength, be difficult for making warning circuit and shell to damage, improve reliability.The contact utmost point 1,2,3,33 of connector is fixed on the shell 31,32, and neon bulb or light-emitting diode 10 are luminous during electric leakage, and buzzer 23 pipes.Power supply lays line and enters socket by the hole on the jack housing 30, and power cord plug is three cores, and wherein sequence number is that 25,26 wiring connects the electrical appliance power circuit, and sequence number is the metal shell that 24 wiring connects electrical appliance.

Be example with the leakage-current alarm socket now, its operation principle is described below: the whole device of (see figure 1) is made up of two parts, and the left side of circuit diagram is one three a hole safety socket, and the right is a warning circuit.Zero line in the socket in the electrode 2 order phase power supplys, the phase line in the electrode 3 order phase power supplys, electrode 1 is former to be earth connection, now change the electric leakage sampling end of alarm into, such three hole safety sockets are earth connection more just.

The power supply of warning circuit is taken from 2,3 liang of interelectrode 220V alternating currents.Getting a galvanic current after resistance 4 step-downs, diode 6 rectifications, electrochemical capacitor 7 filtering, voltage stabilizing didoe 8 voltage stabilizings presses B+ for the work of warning integrated package.Circuit only needs several milliamperes electric current when work, minimal power consumption is so this circuit can long-time reliably working.

After the safety plug of electrical appliance injects 1,2,3 jacks, if there is leaky to take place, warning circuit can be got the electric leakage signal from 1 utmost point at once, flow through resistance 5,9 o'clock of leakage current, on 9, can produce a voltage drop, when its numerical value reaches certain value, neon bulb 10 can be lighted and make it luminous, produce light and report to the police.The electric current of meanwhile lighting neon bulb is through diode 11 rectifications, electric capacity 13 filtering, after voltage-stabiliser tube 14 is stablized, produce a stable direct current high level, NAND gate in the integrated package 15 is opened, after door 15 is opened, by door 15, door 17, resistance 16, the ultralow-frequency oscillator that electric capacity 18 is formed can produce vibration each second signal once and go control by door 19, door 21, resistance 20, the work of the audio frequency oscillator that electric capacity 22 is formed, make it be in a kind of state of intermittent oscillation, when the signal of this audio frequency oscillator was added on the piezoelectric ceramic piece, interrupted chimes of doom just can take place in buzzer 23.

If electrical appliance is a leakproof, extremely go up at 1 of socket so and just can not get leakage current, on the resistance 9 also no-voltage neon bulb 10 is lighted, because 10 do not work, so no current in diode 11 branch roads, door 15 is closed, and ultralow-frequency oscillator is with regard to failure of oscillation, thereby force audio frequency oscillator also to be in the failure of oscillation state, buzzer just can not sounding.

If the corresponding position in the electrical schematic diagram of 27,28,29 3 end reconfigurations in the two-wire plug of Fig. 1 lower left, replace Three-hole socket after, this circuit has promptly become the schematic diagram of leakage-current alarm plug.33 is the two poles of the earth of common bipod attaching plug among the figure, contacts with zero, the phase line of AC power respectively.The power circuit of 25,26 liang of termination electrical appliances among the figure in the power cord plug, the metal shell of 24 termination electrical appliances, it is the electric leakage sampling end of warning circuit.When electrical appliance leaked electricity, 24 ends had electric current resistance 5,9 loops of flowing through, and repeated the warning course of work of socket.Make neon bulb 10 luminous and buzzer 23 sounding that are installed on the plug lid, reached the purpose of reporting to the police.

This leakage-current alarm power connector is the branch road application ware, if some electrical appliance work are arranged in a trunk circuit, in case a certain electrical appliance generation leak current fault promptly can be reported to the police separately, specifically points out guilty culprit to the user, has exempted the trouble of checking one by one, judging.The leakage-current alarm socket also can be worked as leakage indicator and be used, and all electrical appliance socket inspections one by one that will carry out earth detection are sent sound and light alarm when injecting a certain electrical appliance rear socket, illustrate that this electrical appliance has leak current fault.

No matter be alarm socket or alarm plug in the utility model; their alarm range is confined to the detection of electrical appliance electric leakage; elephant " electrical shock protection switch " is not all moved to electrical appliance, line electrical leakage; thereby the difficulty and passive the cutting off the electricity supply of causing failure judgement; cause life and the inconvenience of producing, this also is one of advantage of the present utility model.

This connector is cheap in addition, and dependable performance is superior, so the utility model is a kind of power connector of desirable update.

Claims (8)

1, a kind of power connector with warning function of electric leakage, this connector mainly divides Three-hole socket and Two-feet plug, it is characterized in that socket and plug respectively with the warning circuit device that forms a whole.

2, power insert according to claim 1 is characterized in that socket must be three utmost points, and wherein must hold as the electric leakage sampling of this device with 1 utmost point, and earth-free line.

3, power connector according to claim 1 it is characterized in that plug is two utmost points, but power cord plug must be three, and wherein the end of a thread of 24 will connect the metal shell of electrical appliance.

4, power connector according to claim 1 is when is characterized in that leakage-current alarm, by the luminous warning of neon bulb (or light-emitting diode).

5, power connector according to claim 1 when it is characterized in that leakage-current alarm, carries out intermittently (or continuously) acoustic alarm by piezoelectric ceramic piece.

6, power connector according to claim 1 is characterized in that warning circuit has adopted the half-wave rectifier voltage circuit by 4 step-downs, 6 rectifications, 7 filtering, 8 voltage stabilizings.

7, power connector according to claim 1 is characterized in that warning circuit has adopted by 5,9 samplings, dividing potential drop and makes the electrical circuit inspection of neon bulb 10 aura.

8, power connector according to claim 1, it is characterized in that warning circuit has adopted by door 15, door 17, resistance 16, electric capacity 18 and two multivibrator circuits being made up of door 19, door 21, resistance 20, electric capacity 22, and adopted cmos circuit to make oscillating element.

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