KR100726823B1 - Wall socket for breaking short circuit - Google Patents

Abstract

A wall outlet having a function of breaking leakage of electricity is provided to confirm whether leakage of electricity is generated at a low voltage when a plug of an electric device is inserted into an outlet, and then supply power to the electric device to prevent electric shock and damage of the electric device. A wall outlet(100) with a relay(170) for connecting or disconnecting power lines(L,N) includes a power supply(110), a voltage transformer(193), a zero current transformer(120), an amplifier(130), a circuit driver(140), an electronic device(150), and a driver(160). The power supply supplies driving power when a plug of an electric apparatus is inserted into the outlet. The voltage transformer transforms a commercial voltage into a safety voltage and provides the safety voltage to the plug when the driving power is supplied from the power supply. The zero current transformer detects a current leaking from a power line. The amplifier amplifies the detected leakage current. The circuit driver executes an electric leakage breaking function when the amplified leakage current is detected. The electronic device compares the amplified leakage current with a reference current to determine whether leakage of electricity occurs when the circuit driver executes the electric leakage breaking function. The driver controls the relay to disconnect the power line when the electronic device determines that leakage of electricity occurs.

Description

Wall socket for breaking short circuit

1 is a block diagram illustrating an outlet having a general electrical leakage cutoff function.

FIG. 2 is a block diagram illustrating an outlet having a ground fault blocking function according to a first preferred embodiment of the present invention. FIG.

3 is a view for explaining a power connection in accordance with the present invention.

4 is a block diagram illustrating an outlet having a ground fault interrupting function according to a second preferred embodiment of the present invention.

5A is a front view of an outlet according to a preferred embodiment of the present invention.

FIG. 5B is a side view of a state in which the cover of FIG. 5A is opened; FIG.

Fig. 5C is a side view of the cover of Fig. 5A in a closed state.

** Description of the symbols for the main parts of the drawings **

100: outlet 110: power supply

120: current transformer 130: amplifier

140: circuit driver 150: electronic device

160: movable unit 170: relay unit

180: test button 181; Reset button

190: timer 191: power connection

192: display unit

The present invention relates to an outlet having a ground fault interrupting function.

Today, a variety of electronic devices, which derive their driving power from the electricity supplied, have become a very large part of life. In other words, if consumers do not have a variety of electric devices from the start of the day with the eyes open in the morning to go to bed in the evening, life does not become itself.

With the spread of various electric devices, power consumption has also increased, and the size of electric power supplied by electric power companies (for example, KEPCO) has been amplified.

This high power has a positive aspect of simultaneously supplying power to various electrical devices used by many consumers, and at the same time, has a negative side leading to a human accident in the event of an electric shock due to the carelessness of the consumer.

In particular, when using electrical equipment in a high humidity environment, such as bathrooms and kitchens, since there is a high probability of a human accident such as an electric shock accident, an outlet equipped with an earth leakage breaker to prevent an electric shock is used.

FIG. 1 is a block diagram illustrating an outlet having a general earth leakage blocking function.

Referring to FIG. 1, a power outlet 11 having a general earth leakage blocking function may include a power supply 11, a zero current transformer (ZCT) 12, an amplifier 13, a circuit driver 14, and an electronic device ( 15), a movable portion 16, a relay portion 17, and a test button 18.

The power supply unit 11 supplies driving power for driving the electric leakage blocking function of the outlet. That is, the power supply unit 11 supplies driving power to each of the above components (component circuits).

The image current transformer 12 detects leakage currents of the pair of power lines L and N.

The amplifier 13 amplifies the leakage current detected by the image current transformer 12 according to a predetermined predetermined amplification ratio.

When the leakage current amplified by the amplifier 13 is detected, the circuit driver 14 drives a short circuit blocking function according to the driving power supplied from the power supply 11. That is, when the leakage current is detected, the circuit driver 14 drives the electronic device.

When the electronic device 15 is driven by the circuit driver 14, the electronic device 15 determines the electric leakage based on the leakage current amplified by the amplifier 13. That is, the electronic device 15 compares the leakage current value detected by the image current transformer 12 and amplified by the amplifier 13 with a preset reference current value to determine leakage.

The electronic device 15 transmits an OFF signal for shutting off the power lines L and N to the movable unit 16 if it is determined to be leaked, and an ON signal for connecting the power lines L and N if it is not determined to be leaked. Transfer to (16).

The relay unit 17 relays the power lines L and N under the control of the movable unit 16.

The movable unit 16 relays the relay unit 17 when the ON signal is received from the electronic device 15 to connect the power lines L and N, and relays the relay unit 17 when the OFF signal is received. The power lines L and N are disconnected or cut off.

That is, when the current leakage is detected, the outlet 10 having the electric leakage blocking function blocks the power lines L and N through the relay unit 17 to prevent an electric shock accident.

On the other hand, the test button 18 is for the consumer to test the electrical leakage blocking function of the outlet, for example, when the power line (L, N) is opened when the consumer presses the test button 18, the power line If (L, N) is not open, it can be confirmed as malfunction.

However, in the case of using an outlet having such a general earth leakage protection function, when a plug of an electric device is inserted into the outlet, an external power source is applied to the power supply, and a current is immediately applied to the electric device and the human body immediately after passing through the current transformer. An electric shock accident may occur because is authorized. That is, since a short circuit is not immediately interrupted when a plug is inserted into the outlet, a leakage current is applied to the human body, and thus a short circuit is interrupted after an electric shock occurs.

Therefore, there is a problem that an electric shock accident (electric shock accident) and damage of the electric device occur at the moment of plugging the electric device plug into the outlet.

In addition, since the consumer is not visually aware of a dangerous condition in which a short circuit occurs in the electrical outlet, a larger human accident or damage to the electric device may occur while the consumer additionally supplies the electric device.

Accordingly, the present invention has been made to solve the above problems, to provide an electrical outlet having an electrical leakage blocking function that can prevent electric shock accidents and damage to electrical equipment that may occur when the plug of the electrical equipment plugged into the outlet. The purpose is.

In addition, the present invention, when the plug is inserted into the outlet, after a short period of time to check whether the electric shock in a low voltage state such that the electric shock accident and the electrical equipment will not be damaged to prevent the electric shock accident and damage to the electrical equipment by supplying power. It is an object of the present invention to provide an outlet having a circuit breaker.

An object of the present invention is to provide an electrical outlet having an electrical leakage cut-off function that can prevent a human accident or damage to an electrical device, which may additionally occur by a consumer checking the electrical leakage when the electrical outlet occurs. .

According to an aspect of the present invention for achieving the above object, the outlet having a short circuit breaking function includes a relay unit for cutting off or connecting power lines (L, N), and when an external power source is applied by inserting a plug of an electric device A power supply unit for supplying driving power, a voltage converter for converting a commercial voltage into a safety voltage and supplying it to a plug when the driving power is applied, a video current transformer for detecting a leakage current leaking from a power line, and a video current transformer. An amplifier for amplifying the detected leakage current at a predetermined ratio, a circuit driver for driving the earth leakage blocking function when the leakage current amplified by the amplifier is detected, and an amplified leakage current value when the circuit driver drives the earth leakage blocking function. And the electronic device for comparing the reference current value and determining that a short circuit occurs, and when the electronic device determines that a short circuit has occurred, a relay By controlling the moving part comprises blocking the power line.

The electronic device according to the present invention is characterized in that, when the leakage current value is greater than the reference current value, the OFF signal is transmitted to the movable unit, and when the leakage current value is smaller than the reference current value, the ON signal is generated.

The outlet having a ground fault blocking function according to the present invention further includes a timer for delaying the ON signal generated from the electronic device for a predetermined time and transmitting the same to the movable unit.

The movable unit according to the present invention is characterized in that when the ON signal delayed for a predetermined time is received by the timer, the relay unit is connected to connect the power line.

The outlet having a ground fault blocking function according to the present invention further includes a display unit implemented as a light emitting element, and the movable unit, when determining that the ground fault occurs in the electronic device, applies a driving voltage to the display unit to notify the consumer of the ground fault occurrence. It is done.

The outlet having a ground fault blocking function according to the present invention further includes a test button for testing whether the ground fault blocking function of the outlet is normally operated, and a reset button for initializing the outlet after the ground fault occurs.

The electrical outlet having an electrical leakage blocking function according to the present invention is connected to a power line, and when a plug is inserted into the electrical outlet, a pair of electrode plates are electrically connected through one terminal of the plug, so that a voltage connection unit is provided to supply external power to the power supply. It includes more.

The voltage connection unit according to the present invention is connected to one of the power lines and is characterized in that a pair of electrode plates are implemented in a separate structure.

The voltage converter according to the present invention converts AC 220V, which is a commercial voltage, to AC 2.5 to 3V, which is a safety voltage, and is characterized in that it is implemented by a plurality of resistors or transformers.

The outlet according to the present invention comprises an outlet body and a waterproof cover which is made of a transparent and insulating material and slides on the front of the outlet.

According to another aspect of the present invention, an electrical outlet having an electrical leakage blocking function includes a relay unit which cuts or connects power lines L and N, and includes a display unit implemented as a light emitting element and an external power supply by inserting a plug of an electric device. A power supply unit for supplying driving power, a voltage converter for converting a commercial voltage into a safety voltage and supplying the plug to a safety voltage, a video current transformer for detecting a leakage current leaking from the power line, and a video current transformer. An amplifying unit for amplifying the leakage current detected at a predetermined ratio, a circuit driver for driving the leakage current blocking function when the leakage current amplified by the amplifying unit is detected, and amplified leakage If it is determined that a short circuit occurs by comparing the current value with the reference current value, an OFF signal is generated and it is not determined that the short circuit occurs. Otherwise, the electronic device for generating the ON signal, the timer for delaying the ON signal generated from the electronic device for a predetermined time period, and when the OFF signal is generated in the electronic device, the relay unit is controlled to cut off the power line while driving the driving voltage to the display unit. And an ON signal is received from the timer, when the signal is applied and emits light, and includes a movable part for connecting the power line, a test button for testing whether the outlet of the outlet is normally operated, and a reset button for initializing the outlet after a short circuit occurs. .

Hereinafter, with reference to the accompanying drawings, an outlet having a ground fault blocking function according to the present invention will be described in detail.

2 is a block diagram illustrating an outlet having a ground fault blocking function according to a first embodiment of the present invention.

Referring to FIG. 2, the electrical outlet 100 having an earth leakage blocking function according to the present invention includes a power supply unit 110, a zero current transformer (ZCT) 120, an amplifier 130, a circuit driver 140, The electronic device 150, the movable unit 160, the relay unit 170, the test button 180, the reset button 181, the power connection unit 191, the voltage converter 193, the display unit 192, and the timer 190 ).

When the plug is inserted into the outlet 100, the power supply unit 110 supplies driving power for driving the short-circuit blocking function. That is, the power supply unit 110 supplies driving power to each of the above components (component circuits).

The voltage converter 193 may be implemented as a pair of resistance elements or a plurality of resistance elements, and does not affect a human body caused by an electric shock accident due to a voltage supplied to an electric device, for example, a commercial voltage AC 220V. In addition, the product is converted into a safety voltage, such as a low voltage of 2.5 to 3V, so that product damage of the electric device is extremely minimal, and is supplied to a plug inserted into the outlet 100.

That is, when the plug is inserted, the voltage converter 193 converts the commercial voltage into the safety voltage and supplies the plug to the safety voltage for a predetermined time to determine whether a short circuit occurs, thereby preventing an electric shock accident and damage to the electric device.

The image current transformer 120 detects leakage currents of the pair of power lines L and N.

The amplifier 130 amplifies the leakage current detected by the image current transformer 120 according to a predetermined predetermined amplification ratio.

When the leakage current amplified by the amplifier 130 is detected, the circuit driver 140 drives the short circuit blocking function according to the driving power supplied from the power supply unit 110. That is, when the leakage current is detected, the circuit driver 140 drives the electronic device 150.

When the electronic device 150 is driven by the circuit driver 140, the electronic device 150 determines the electric leakage based on the leakage current amplified by the amplifier 130. That is, the electronic device 150 determines the occurrence of a short circuit by comparing the leakage current value detected by the image current transformer 120 and amplified by the amplifier 130 with a preset reference current value.

The electronic device 150 transmits an OFF signal for shutting off the power lines L and N to the movable unit 160 when it is determined that a short circuit has occurred, and timers an ON signal for connecting the power lines L and N if it is not determined that a short circuit has occurred. Transmit to 190.

The timer 190 provides the ON signal to the movable unit 160 after delaying the ON signal received from the electronic device 150 for a predetermined time.

The relay unit 170 relays the power lines L and N under the control of the movable units 160 and 16.

The movable unit 160 cuts off the power lines L and N by relaying the relay unit 170 within 0.03 seconds as soon as the OFF signal is received from the electronic device 150.

In addition, when the OFF signal is not received from the electronic device 150 and the ON signal delayed by the timer 190 is received, that is, when the short circuit time elapses to determine whether a short circuit occurs in the outlet 100, the short circuit may occur. If not generated, the relay unit 170 is relay-controlled to connect the power lines (L, N).

The display unit 192 may be implemented as a light emitting device such as an LED. When a short circuit occurs under the control of the movable unit 160 or the electronic device 150, the display unit 192 emits light to confirm the short circuit occurrence to the consumer.

For example, when the OFF signal is received from the electronic device 150, that is, when a short circuit occurs, the movable unit 160 applies a driving voltage to the display unit 192 to emit light, thereby enabling the consumer to confirm the short circuit occurrence. .

In addition, the test button 180 is for the consumer to test the short-circuit blocking function of the outlet 100, for example, the normal operation when the power line (L, N) is opened when the consumer presses the test button 180 to test As a result, if the power lines L and N are not opened, a malfunction may be confirmed.

The reset button 181 is a short circuit occurs, and after controlling the relay unit 170 to cut off the power lines (L, N) through the display unit 192 after confirming the occurrence of a short circuit, the plug is unplugged, When the reset button 181 is pressed, a reset signal is applied to a component such as the electronic device 150 through the power supply unit 110 to initialize the ground fault blocking function.

The power connection unit 191 may be implemented as a pair of electrode plates, so that power is supplied to the power supply unit 110 in the process of inserting the plug into the outlet 100.

3 is a view for explaining a power connection unit according to the present invention.

As shown in FIG. 3, a pair of electrode plates 191a and 191b may be connected to one power line (eg, L) and may be implemented in a separated structure.

Therefore, when the plug 300 of the electrical device is inserted into the insertion groove of the outlet 100, one terminal of the plug electrically connects the first electrode plate 191a and the second electrode plate 191b.

That is, when the plug 300 is inserted into the outlet 100, the pair of electrode plates 191a and 191b are electrically connected to each other so that the external power is applied to the power supply 110, and the external power is applied to the power supply 110. If so, the driving power supply for driving the blocking function of the outlet 100 is supplied.

4 is a block diagram illustrating an outlet having a ground fault blocking function according to a second exemplary embodiment of the present invention.

Referring to FIG. 4, the voltage converter 193 may be implemented as a transformer, and the transformer of the voltage converter 193 converts the commercial voltage into a safe voltage according to the turns ratio of the primary and secondary coils. .

In other words, the transformer does not affect the human body due to the electric shock accident, and converts the commercial voltage AC 220V to a safety voltage such that the damage of the product of the electric device is extremely minimal, for example, AC 2.5 to 3V low voltage Supply to the plug is inserted into the outlet (100).

Among the components shown in FIG. 4, the same reference numerals are given to the same components as the outlet 100 illustrated in FIG. 2, and detailed descriptions of the components having the same functions will be omitted.

A brief description will be given of an operation method of the outlet 100 having the earth leakage blocking function described above.

When the plug is inserted into the insertion groove of the outlet 100, one terminal of the plug electrically connects the pair of electrode plates 191a and 191b of the power connection unit.

When the pair of electrode plates 191a and 191b of the power connection unit are electrically connected, an external power source is applied to the power supply unit 110 to drive an electric leakage blocking function of the outlet 100.

The voltage converter 193 converts a commercial voltage into a safety voltage and supplies the same to the plug, and the image current transformer 120 detects leakage currents of the pair of power lines L and N.

The amplifier 130 amplifies the leakage current detected by the image current transformer 120 according to a predetermined predetermined amplification ratio, and the circuit driver 140 drives the electronic device 150 when the leakage current is detected. 150 determines the occurrence of a short circuit by comparing the leakage current value with a predetermined reference current value.

When the electronic device 150 determines that a short circuit occurs, that is, when the leakage current value is greater than the reference current value, the electronic device 150 transmits an OFF signal to the movable unit 160 to cut off the power lines L and N through the relay unit 170. The power lines L and N are cut off.

The timer 190 provides the ON signal to the movable unit 160 after the ON signal received from the electronic device 150 is delayed for a predetermined time so that the power lines L and N are connected.

When a short circuit occurs, a driving voltage is applied to the display unit 192 to confirm the short circuit occurrence to the consumer.

Meanwhile, the consumer may check the normal operation of the ground fault blocking function through the test button 180 or may initialize the ground fault blocking function after the ground fault occurs through the reset button 181.

Figure 5a is a front view of the outlet according to a preferred embodiment of the present invention, Figure 5b is a side view of a state of opening the cover of Figure 5a, Figure 5c is a side view of a state of the cover of Figure 5a closed.

5A to 5C, the outlet 100 having the electric leakage blocking function according to the present invention may be provided with a waterproof cover 200 on the front surface of the insertion groove into which the plug can be inserted.

That is, a waterproof cover 200 may be provided to prevent the ground leakage blocking circuit inside the outlet 100, that is, each component described above from being malfunctioned or damaged due to a humid environment.

A slide groove 101 is provided in a portion of the side surface of the outlet body 100 ', and a slide protrusion (not shown) is provided in a portion of the inner side of the waterproof cover 200 so that the outlet body 100' and the waterproof cover are provided. 200 can be slide coupled. That is, since the cover provided in the existing outlet body is hinged, the cover is not in the form of protruding on the front surface of the cover is coupled to the slide, the space utilization can be maximized.

That is, in a general state, in which the consumer does not insert the plug of the electric device into the outlet 100, the electrical leakage blocking circuit of the outlet 100 is maintained by keeping the waterproof cover 200 closed in front of the outlet 100. In a use state in which the plug of the electric device is inserted into the outlet 100, the waterproof cover 200 is switched to an open state, and the plug is inserted into the outlet 100.

Such a waterproof cover is preferably formed slim using a transparent and insulating material.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims.

As described above, according to the present invention, when the plug of the electrical device is inserted into the outlet, the electric power is supplied momentarily after confirming whether the electric leakage in a low voltage state such that an electric shock accident and electrical equipment will not be damaged for a certain time Electric shocks and damage to electrical equipment can be prevented.

In addition, when a short circuit occurs, the power may be cut off and at the same time, the display unit may visually notify the consumer of the short circuit occurrence.

In addition, by sliding the waterproof cover to protect the circuit configuration, such as the inside of the outlet, the space utilization can be maximized, and the fire and electric shock can be prevented.

Only when the plug is inserted, power is supplied to the power supply unit so that a low voltage is supplied to the electric device, so that standby power is unnecessary, thereby minimizing electric energy consumption and minimizing electric charges.

Claims (8)

In the outlet having a relay unit for cutting off or connecting the power lines (L, N), A power supply unit for supplying driving power when the plug of the electric device is inserted into the outlet; A voltage converter converting a commercial voltage into a safety voltage and supplying the plug to the plug when driving power is applied from the power supply; An image current transformer for detecting a leakage current leaking from the power line, An amplifier for amplifying the leakage current detected by the image current transformer; When the leakage current amplified by the amplification unit is detected, a circuit driver for driving a short circuit blocking function, An electronic device configured to determine the occurrence of a short circuit by comparing the amplified leakage current value with a reference current value when the circuit driver drives the ground fault blocking function; When the electronic device determines that a short circuit occurs, the movable unit to control the relay unit to cut off the power line Outlet having a short circuit blocking function comprising a. The method of claim 1, And a power connection unit provided between the power line and the power supply unit, the power connection unit configured to supply power to the power supply unit when the plug is inserted into the outlet. The method of claim 2, wherein the power connection portion, And a pair of electrode plates electrically connected by one terminal of the plug. The method according to any one of claims 1 to 3, The electronic device transmits an OFF signal to the movable unit when the leakage current value is greater than the reference current value, and generates an ON signal when the leakage current value is less than the reference current value. And a timer for delaying the ON signal generated from the electronic device for a predetermined time and transmitting the same to the movable unit. The movable unit controls the relay unit to connect the power line when the ON signal delayed for a predetermined time is received by the timer; An outlet having an earth leakage blocking function characterized by the above-mentioned. The method according to any one of claims 1 to 3, The voltage converter, An outlet having a ground fault interrupting function, characterized by converting a commercial voltage of AC 220V into a safety voltage of AC 2.5 to 3V. The voltage converter according to any one of claims 1 to 3, wherein An outlet having an earth leakage blocking function, characterized in that it is implemented with at least one resistor. The voltage converter according to any one of claims 1 to 3, wherein Electrical outlet having a circuit breaker, characterized in that implemented as a transformer. The outlet according to any one of claims 1 to 3, wherein An outlet having a ground fault blocking function, characterized in that the outlet body and a transparent cover which is implemented in a transparent and insulating material and slides on the front of the outlet.

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