KR200221939Y1 - A Power Supply Cord for Isolating Electromagnetic Wave - Google Patents

Abstract

The present invention can be grounded by connecting the grounding terminal of the electrical appliance to the reference voltage (0V) terminal in order to remove the electromagnetic waves generated by the ground fault when using the electrical appliance, so that the user can check through a lamp or buzzer It relates to an electromagnetic wave shielding power cord having an electromagnetic wave shielding circuit.

The power cord for shielding electromagnetic waves of the present invention is a grounding means (GC) made of a conductor, the electromagnetic wave confirmation means 31 to confirm the presence of electromagnetic waves when a part of the body in contact with the grounding means (GC), and the electromagnetic wave When the electromagnetic wave generation is detected by the check means 31, the electromagnetic wave blocking switch 32 which can block the electromagnetic wave generated by the switch control is formed to protrude to the outside and the electromagnetic wave blocking device having an electromagnetic wave blocking circuit therein is an external power source. It is characterized in that it is installed in the power cord for supplying power to the electrical appliance 40 receives the input.

Description

Power Cord for Isolating Wave {A Power Supply Cord for Isolating Electromagnetic Wave}

The present invention relates to a power cord for shielding electromagnetic waves, and in detail, in order to remove electromagnetic waves caused by poor grounding when using electrical appliances, the ground terminal of electrical appliances can be connected to a reference voltage (0V) terminal and grounded. The present invention relates to a power cord for electromagnetic wave shielding circuit having an electromagnetic wave shielding circuit which a user can check through a lamp or a buzzer.

Electromagnetic waves mean waves of electric and magnetic fields generated by the flow of electricity. These electromagnetic waves are divided into various kinds of electromagnetic waves according to their frequency. Among them, the electromagnetic waves having low frequency band (0 ~ 500kHz) generated from home appliances or office appliances are the most commonly encountered human body in daily life. Is one of the harmful electromagnetic waves. Electromagnetic waves generated through the use of such electrical appliances are classified into electric field electromagnetic waves generated from a supplied voltage and magnetic field electromagnetic waves generated from a current flowing in a conductive wire.

In order to remove the electromagnetic waves harmful to the human body, active research is being conducted. Among the electromagnetic waves, most of the electromagnetic waves can be cut off through the grounding of electrical appliances, and magnetic electromagnetic waves are special alloys that can shield magnetic lines flowing around the conductors. It is known that it can be blocked by wrapping a wire or forming a magnetic field line in the reverse direction. Therefore, the above-mentioned magnetic field electromagnetic waves can be shielded to some extent by forming a wire with a shielding wire.

On the other hand, as described above, although the electric field electromagnetic wave of the electromagnetic wave can be mostly blocked through the ground of the electrical appliance, the conventional outlet and power cord for supplying power do not have the grounding function, or even if the grounding function of the electrical appliance There is a problem that the user can not clearly identify whether the ground is different because the presence or absence of the ground is different depending on the connection position with the connection plug.

In order to solve the above problems, a power plug of Korean Patent Publication No. 2000-56558 (published date 2000.09.15) has been proposed. When the power plug is a single-phase two-wire AC power source, the hot line and the cold line are discriminated to connect the earth ground terminal of the electric device to the cold line, and in the case of the single-phase three-wire AC power source, a virtual ground potential point is generated. It is characterized in that the electromagnetic wave is blocked by connecting the earth ground of the electrical equipment to the.

However, the power plug is different from each other in the structure of the power plug applied to the single-phase two-wire and single-phase three-wire type is not compatible with each other, in the case of the single-phase two-wire type, when the electromagnetic wave is generated, the power plug is disconnected from the outlet There was a cumbersome problem of repositioning and repositioning.

Therefore, the present invention was devised to solve the above problems, and the object of the present invention is to easily check the electromagnetic waves generated by poor grounding of electrical appliances, and to re-separate and combine the power cords when the electromagnetic waves are generated. The present invention provides a power cord for shielding electromagnetic waves that can block electromagnetic waves by inducing grounding of electrical appliances through a simple switching operation.

Another object of the present invention is to provide an electromagnetic wave shielding power cord that can be applied to both single-phase two-wire and single-phase three-wire AC power supplied to an electrical product through a single power cord.

1 is a perspective view briefly showing a structure of a power cord for shielding electromagnetic waves connected to an electric appliance according to a first embodiment of the present invention;

2 is an electromagnetic wave shielding circuit provided inside the power cord for shielding electromagnetic waves according to the first embodiment of the present invention,

3 is a flowchart illustrating a process of detecting whether an electromagnetic wave is generated by an electromagnetic shielding circuit built in a power source for electromagnetic wave blocking according to a first embodiment of the present invention, and blocking the generated electromagnetic wave;

4 is an external perspective view of a power cord for shielding electromagnetic waves having an electromagnetic shielding circuit formed in the power plug according to a second embodiment of the present invention;

* Brief description of symbols for the main parts of the drawings

10: power plug 20: electric wire

30: electromagnetic wave shielding device 31: electromagnetic wave checking means

32: electromagnetic wave cutoff control switch 40: electrical appliances

In order to achieve the above object, the electromagnetic wave shielding power cord of the present invention includes a grounding means made of a conductor, an electromagnetic wave checking means capable of confirming the presence or absence of electromagnetic waves when a part of the body comes into contact with the grounding means, and the electromagnetic wave checking means. When the electromagnetic wave is detected by the electromagnetic wave blocking device which can block the electromagnetic wave generated through the switch control is formed on the outside and the electromagnetic wave blocking device equipped with the electromagnetic wave blocking circuit inside receives the external power to supply power to the electrical appliance. It is installed on the power supply cord.

In addition, the electromagnetic shielding circuit has a resistor (R1) (R2) connected in series to each of the AC power supply terminal (AC1) (AC2) of both ends for supplying power to the electrical appliance and the ground terminal (GND) connected to the ground terminal of the electrical appliance A resistor R3 connected in series with the resistor, a resistor R1 connected to the AC power supply terminals AC1 and AC2, a resistor connected to the first and third terminals, and connected to the ground terminal GND, respectively. A variable resistor (R5) is connected to the second stage (R3) to adjust the resistance value through the volume switch, electromagnetic wave confirmation means and protective resistor (R4) connected to the second stage of the variable resistor (R5) and It comprises a grounding means (GC) of the conductor.

In addition, the grounding means (GC) is formed of a conductor on the outside of the protruding volume switch for adjusting the resistance value of the variable resistor (R5).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The electromagnetic wave shielding power cord according to the present invention causes the electromagnetic wave by simply manipulating the switching element attached to the electromagnetic wave shielding power cord supplying power to the electrical appliance while the user visually checks the electromagnetic wave generated while using the electrical appliance. Phosphorus residual load is connected to a terminal having a reference voltage (0V) and grounded to block electromagnetic waves.

1 is a perspective view schematically showing a structure according to a first embodiment of a power cord for shielding electromagnetic waves connected to electrical appliances according to the present invention.

As shown in FIG. 1, the electromagnetic wave shielding power cord of the present invention includes a power plug 10 connected to a power outlet and receiving power, and power supplied from the power plug 10 to the electrical appliance 40. When power is supplied to the electrical appliance 40 by being connected to a wire 20 to be supplied and the power plug 10 is supplied from an external power supply outlet (not shown), the power plug 10 and an external power supply are supplied. Electromagnetic wave that detects the occurrence of electromagnetic wave and warns the occurrence of electromagnetic wave when the ground is not grounded due to lack of proper connection with the terminal, and induces the correct grounding of the current flowing through the wire 20 through the switch adjustment to block the electromagnetic wave. Blocking device 30 is provided.

The power plug 10 has two AC power input terminals in the same way as a general power plug and may include a ground terminal. The power plug 10 is connected to a power supply outlet and is connected to an electrical appliance (wire) through a wire 20. Power on 40).

The electric wire 20 has two AC power supply lines for supplying the AC power input from the two terminals of the power plug 10 to the power input terminal 41 of the electric appliance 40 and the ground terminal of the electric appliance 40 ( 42), which consists of a shielding wire surrounding the outside of the AC power supply line and maintains the reference ground voltage (0V) to block electromagnetic waves generated from the wire. have.

The electromagnetic wave blocking device 30 in FIG. 1 is installed at any one of the wires, and the electromagnetic wave checking means 31 and the electromagnetic wave checking means 31 which can confirm the presence or absence of electromagnetic waves outside the electromagnetic wave blocking device 30. When it is confirmed that the electromagnetic wave is generated through the electromagnetic wave blocking control switch 32 that can block it is formed. The outside of the electromagnetic wave blocking control switch 32 protruding from the electromagnetic wave blocking device 30 is made of a conductor to serve as a grounding means to be described later. The electromagnetic wave checking means 31 and the electromagnetic wave blocking control switch 32 are some components of the electromagnetic wave blocking circuit provided in the electromagnetic wave blocking device 30.

2 is a circuit diagram illustrating an electromagnetic wave blocking circuit provided in the electromagnetic wave shielding device 30. As shown in the figure, the electromagnetic wave blocking circuit includes a plurality of resistors R1, R2, R3, R4, and R5, a neon lamp Ne, and a grounding means GC of a conductor. Reference numeral R5 denotes a variable resistor, and reference numerals AC1 and AC2 denote AC power input terminals transmitted from the power plug 10, and GND denotes a ground terminal connected to the ground terminal of the electrical appliance 40.

Resistor R1, R2, and R3 having the same magnitude are connected to AC power input terminal AC1, AC2, and ground terminal GND, and these resistors R1, R2, and R3 are The resistors R5 are connected to each other. Variable resistor (R5) used in the embodiment of the present invention is a variable resistor having three stages, the resistance (R1) in the direction of AC power input terminal (AC1) (AC2) in the first and third stages of the variable resistor. (R2) is connected, and the center two stages are connected to the resistor (R3) in the direction of the ground terminal (GND). In addition, two stages of the variable resistor are connected in series with the neon lamp Ne, the protection resistor R4 and the grounding means GC connected in series with the resistor R3 in the direction of the ground terminal GND.

The variable resistor R5 has a terminal having a ground reference voltage (0 V) among the AC voltage terminals AC1 and AC2 because the resistance values between the first and second stages, and the third and second stages are mutually adjusted. In the case of single-phase 2-wire AC voltage, the ground reference voltage (0V) terminal is selected and connected to the ground terminal (GND) for grounding. Also, when there is no terminal having a ground reference voltage (0V) among the AC voltage terminals AC1 and AC2, that is, when the AC power source is a single-phase three-wire AC voltage, the AC voltage terminal AC1 and AC2 are variable. The grounding terminal (GND) is grounded by generating a ground reference voltage (0V) by dividing the resistance value between two stages of the resistor (R5) equally.

Neon lamp Ne of the AC voltage terminal AC1 (AC2) when the ground reference voltage (0V) terminal is not selected in selecting the terminal having the ground reference voltage (0V) through the variable resistor (R5) As the effective voltage is turned on in the process of being transmitted to the grounding means (GC), the grounding terminal (GND) is not grounded and serves to warn that electromagnetic waves are generated. At this time, the grounding means (GC) is made of a conductor to indicate that the current flows through the neon lamp Ne when the human body or a conductive material having a discharge effect is in contact, the protection resistor R4 connected to the grounding means (GC) The resistance is increased to prevent electric shock when a part of the body is connected to the grounding means (GC). The neon lamp Ne shows an example of the electromagnetic wave checking means 31, which may be made through another type of lamp, a light emitting diode, or a buzzer.

The resistance value of the variable resistor (R5) is controlled through the adjustment of the volume switch that can be rotated left and right, by the grounding means (GC) which is the above-described conductor is formed on the outside of the volume switch, the user's human body adjusts the volume switch It is configured to naturally contact the ground means (GC) in the process. This volume switch means the electromagnetic wave blocking control switch 32 described in FIG.

In the embodiment of the present invention, the resistance values of R1, R2, and R3 are configured to 10 kW, the resistance value of R4 is 220 kW, and the variable resistor R5 is configured to have a variable resistance value of 2 kW. It is obvious that the present invention is not limited thereto, and may be configured to have various other values representing the same effect.

Hereinafter, a description will be given of a process for detecting the occurrence of electromagnetic waves according to the use of electrical appliances, the power cord for electromagnetic wave blocking having the above configuration to warn it and to block the generated electromagnetic waves.

3 is a flow chart illustrating a process of detecting an electromagnetic wave generated by the electromagnetic shielding circuit embedded in the power cord to warn of the occurrence of electromagnetic waves and blocking the generated electromagnetic waves. First, in step S10, the user connects the power cord of the present invention to a power outlet. Thereby powering electrical appliances. At this time, the power supplied to the electrical appliance through the power outlet is an AC power source, it does not distinguish between single-phase two-wire and single-phase three-wire.

When power is supplied to the electrical appliance through the power cord, in step S20, the user contacts a part of the body with the grounding means GC of the conductor formed on the outside of the volume switch to check whether the neon lamp Ne is turned on. If the neon lamp Ne is turned on, it means that the AC power supplied from the AC voltage terminals AC1 and AC2 is transmitted to the grounding means GC via the neon lamp Ne. The ground terminal (GND) of the power cord connected to the terminal is not connected to the terminal having the ground reference voltage (0V), which means that the electromagnetic wave is generated.

When the neon lamp Ne is turned on in step S20, the volume switch is adjusted in step S30. Adjusting the volume switch adjusts the resistance value of the variable resistor R5. The resistance value between the first and second stages of the variable resistors associated with the variable resistor R5 and the resistance value between the third and second stages are adjusted using the characteristics of the variable resistor R5. By adjusting the voltage at the second stage is adjusted. Therefore, when the voltage at the second stage of the variable resistor is lower than the voltage of the ground terminal GND (preferably, the voltage at the second stage is 0V), the load residual power transmitted from the electrical appliance through the ground terminal GND is Grounded by voltage. At this time, the neon lamp Ne is turned off by not supplying power to the grounding means GC through the neon lamp Ne.

At this time, when the AC power supplied to the AC power input terminals AC1 and AC2 is a single-phase two-wire type, the effective AC voltage transmitted from one side of the AC power input terminals AC1 and AC2 is a variable resistor R5. The load residual voltage of electrical appliances consumed through the ground and transmitted from the ground terminal (GND) is connected to and grounded to a terminal having a ground reference voltage (0V) to block electromagnetic waves. If the AC power supplied to the AC power input terminals AC1 and AC2 is a single-phase three-wire type, the voltage transmitted to the AC power input terminals AC1 and AC2 is equally divided by the variable resistor R5. As a result, a ground reference voltage of 0V is formed at two stages of the variable resistor R5, which is connected and grounded to the ground terminal GND to block electromagnetic waves.

The user who adjusts the volume switch in step S30 checks whether the neon lamp Ne is turned off in step S40, and if it is not turned off, returns to step S30 until the lit neon lamp Ne is turned off. Run it repeatedly.

If the neon lamp Ne is not turned on in step S20, to check whether the electromagnetic wave breaking circuit is broken in step S50, by adjusting the volume switch in step S60, the neon lamp Ne is not turned on in step S70. If not, it is determined that the electromagnetic shielding circuit has failed, as in step S80, so that the circuit can be replaced or the failed component can be replaced.

As described above, the electromagnetic wave shielding device 30 installed in the power cord of the present invention has a simple circuit configuration and can be manufactured compactly. Therefore, as described above in FIG. 1, the power cord may be installed at any position of the electric wire.

In addition, the electromagnetic wave blocking device 30 may be installed inside the power plug 10 forming a power cord as shown in FIG. 4. 4 is a second embodiment showing that the electromagnetic wave blocking device is formed inside the power plug. As shown in the drawing, the electromagnetic wave blocking device 30 is installed inside the power plug 10, and the double electromagnetic wave blocking device is shown in FIG. The volume switch of the variable resistor, which is the control switch 32, and the neon lamp, which is the electromagnetic wave checking means 31, are formed to protrude to the outside of the power plug, so that the electromagnetic wave generation can be easily checked and cut off.

As described above, the power cord for shielding electromagnetic waves of the present invention can easily check whether electromagnetic waves are generated through the electromagnetic wave checking means of the electromagnetic wave shielding device installed therein, and effectively detect the electromagnetic waves generated by simple operation of the electromagnetic wave shielding switch. You can block.

In addition, the present invention can be applied to both single-phase two-wire or single-phase three-wire AC power supplied to electrical appliances as a single electromagnetic wave shielding power cord without changing the internal electromagnetic wave shielding circuit. This saves you the hassle and cost of replacement.

In addition, since the structure of the electromagnetic wave shielding device installed in the electromagnetic wave shielding power cord of the present invention is simple, it can be manufactured in a small size, and can be easily installed on a power cord such as an electric wire or a power plug. It can be easily replaced with the power supply cord used in the conventional electrical appliances can be applied to all conventional electrical appliances to avoid the risk of electromagnetic waves at low cost.

Claims (6)

A grounding means (GC) made of a conductor, an electromagnetic wave checking means (31) which can confirm the presence of electromagnetic waves when a part of the body comes into contact with the grounding means (GC), and electromagnetic wave generation by the electromagnetic wave checking means (31). If this is detected, an electromagnetic wave shielding switch 32 capable of blocking electromagnetic waves generated through the switch adjustment is formed on the outside, and an electromagnetic wave blocking device having an electromagnetic wave blocking circuit therein receives an external power supply to the electrical appliance 40. Power cord for electromagnetic wave shield, characterized in that installed in the power cord for supplying power. The method of claim 1, wherein the electromagnetic wave blocking circuit Ground terminal connected to the resistor (R1) (R2) and the ground terminal (42) of the electrical appliance 40 connected in series to the AC power supply terminal (AC1) (AC2) of both ends for supplying power to the electrical appliance (40) ( A resistor R3 connected in series with GND, a resistor R1 (R2) connected to the AC power supply terminals AC1 and AC2, and a first terminal and a third terminal, respectively, connected to the ground terminal GND. The second stage is connected to the connected resistor (R3) and the variable resistor (R5) to adjust the resistance value through the volume switch, and the electromagnetic wave checking means (31) connected to the second stage of the variable resistor (R5) and protection A power cord for electromagnetic wave blocking, comprising a resistor (R4) and a grounding means (GC) of a conductor. The power cord for electromagnetic shielding according to claim 2, wherein the grounding means (GC) is formed of a conductor on an outer side of the protruding volume switch for adjusting the resistance value of the variable resistor (R5). The power cord for electromagnetic wave blocking according to claim 2, wherein the electromagnetic wave checking means (31) emits light or emits a warning sound to warn the occurrence of electromagnetic waves. The power cord for electromagnetic shielding according to any one of claims 1 to 4, wherein the electromagnetic wave shielding circuit is installed in a wire (20) between the power plug (10) and the electrical appliance (40). The power cord for electromagnetic wave shield according to any one of claims 1 to 4, wherein the electromagnetic wave shielding circuit is installed inside the power plug (10).