KR101233252B1 - Electric field automatic diverting circuit for treating electric field of electric heating mat - Google Patents

Abstract

The present invention relates to an electric field automatic switching circuit in a heat transfer mat having a heating wire (H) supplied with AC power through first and second AC power lines (AC1) and AC2, wherein one side of the heating wire is branched from each other. The first switching element (S1) and the second switching element (S2) connected to the contact point H and connected to the first alternating current power supply line side, and one side is connected to the heating wire (H) in the state branched between each other and the other side The third switching device (S3) and the fourth switching device (S4) connected to the second AC power supply line side, the first switching device (S1) and the third switching device (S3) are connected to operate simultaneously and the first Connecting the second switching element S2 and the fourth switching element S4 to operate simultaneously; The AC plug connected to the AC power supply line AC1 and the second AC power supply line AC2 is connected to the microcomputer U1 to check whether an electric field is generated according to a connection state in which the AC plug is inserted into the AC outlet. When generated, the microcomputer U1 simultaneously operates the first switching element S1 and the third switching element S3 to form a flow of electricity through the first switching element S1 and the third switching element S3. When the electric field is not generated, the microcomputer U1 simultaneously operates the second switching device S2 and the fourth switching device S4 to operate the second switching device S2 and the fourth switching device S4. By controlling the flow of electricity through the forming is characterized in that the electric field using only the heating wire (H) without a shield plate.

Description

ELECTRIC FIELD AUTOMATIC DIVERTING CIRCUIT FOR TREATING ELECTRIC FIELD OF ELECTRIC HEATING MAT}

The present invention relates to an electric field automatic switching circuit for processing an electric field so as not to generate an electromagnetic wave through the control in the temperature controller for the electric field generated in the heat transfer mat, and more particularly, to absorb the electric field generated in the heating wire of the heat transfer mat The present invention relates to an electric field automatic switching circuit in a heat-resistant mat without a shielding plate capable of treating an electric field using only an electric flow of a heating wire without using a shielding plate which is essentially used for shielding.

In general, electric products such as heating mats or stone beds that generate heat by using electric energy as a heat source generate electric and magnetic fields as electric current is supplied, and harmful electromagnetic waves are formed by the electric field (electric field) to harm the human body. Will be affected.

In particular, the heat transfer mat has a problem that the electric wire and a large amount of harmful electromagnetic waves are directly induced to the human body because the built-in heating wire and the human body is in close proximity.

Normally, the heating mat should be connected by inserting an AC plug into an AC outlet supplied with AC power in order to supply electrical energy to the heating wire, which is one of two power terminals (first alternating current line and second alternate power line) in the AC power source. One becomes a terminal of the same potential as the ground wire and the other becomes a terminal of the (+) (-) potential. When the same potential is connected to the ground line according to the insertion direction of the AC plug, it generates electromagnetic waves below a certain value or generates electromagnetic waves. When it is possible to shield or when the positive potential is connected to the ground wire, it generates a lot of electromagnetic waves.

Therefore, in recent years, in order to shield or block harmful electromagnetic waves generated through the heating wire of the heat transfer mat, an electric field automatic switching circuit is configured in the temperature controller to automatically switch the electric field.

However, in constructing an automatic field switching circuit for the temperature controller used in the heat transfer mat, a shield plate for absorbing and blocking an electric field generated from the heat wire of the heat transfer mat is essentially embedded in the heat transfer mat. In the field of electric field mats, all of the electric field mats have been used to prevent harmful electromagnetic waves from being generated by switching the electric field automatically by detecting the electric potential using a shielding plate embedded in the mat. .

1 is a circuit diagram illustrating an example of an automatic switching switching method for electric field treatment in a conventional heat transfer mat, and automatically selects a line having a potential, such as ground, out of two lead wires through a microcomputer port without a separate grounding line, and grounding Forming a virtual ground point on the circuit when there is no potential line, such as by connecting to the shield plate 14 embedded in the mat body by switching the electric field automatically so that the potential generated from the heat transfer mat and electromagnetic waves are not induced to the human body Is applying.

An example of the automatic switching switching method of FIG. 1 is an antenna formed in a PCB pattern at a port input of a microcomputer 12 by using an input terminal of a typical microcomputer 12 port composed of MOSFET devices. ) Is configured to sense the space potential formed between the antenna and the ground to perform switching control, and the node between the first photocoupler PC1 and the second photocoupler PC2 constituting the photocoupler unit 17 ( N1) is configured to be connected to the shield plate 14 and the circuit ground (GND), respectively.

On the other hand, Figure 2 is a circuit diagram showing another example of the automatic switching switching method for the electric field treatment in the conventional heat transfer mat, it is possible to automatically perform the switching switching for electromagnetic shielding through the microcomputer control between the shielding plate and the earth Read the space potential and determine the space potential in the microcomputer to control the switching output under the operating condition set in the microcomputer, the first photocoupler (without the method of connecting the shield plate 10 to the circuit ground) Direct connection to the node N1 between the PC1) and the second photocoupler (PC2), as well as the switching potential for the automatic switching of the electric field by using the space potential formed between the shield plate 10 and the ground as an input potential Read through the ring capacitor (C1) and resistor (R3) to the transistor (Q1) and integrate the integrated circuit (20) by RC parallel of the resistor (R4) and capacitor (EC1) It can also be induced by increasing the accurate and stable potential detected and input by providing an input signal to the microcontroller (U1) side, and in any case through the electric field will automatically switch to a completely shield the electromagnetic waves.

However, as can be seen from the examples of FIGS. 1 and 2 having an automatic switching switching method for treating an electric field generated in the heat transfer mat, in the field of the conventional heat transfer mat, all are in the hot wire of the heat transfer mat for shielding harmful electromagnetic waves. The shield plates 14 and 10 are essentially used for absorbing the generated electric field, and the use of the shield plates 14 and 10 is in a state in which the manufacturing cost of the heat transfer mat including the thermostat cannot be lowered. Although it is pointed out as a factor to increase the work process, there is no effort and research to improve this in the field to date.

The present invention has been made in view of the above-mentioned problems, and the like, absorbs the electric field generated from the heating wire of the heating mat to treat the electric field using only the electric flow of the heating wire without using a shield plate which is essential to block harmful electromagnetic waves. It is an object of the present invention to provide an automatic field switching circuit in a heat transfer mat without a shielding plate.

The present invention can reduce the manufacturing cost through the removal of the shield plate, which is an essential component, and provides an automatic switching switching method for electric field treatment in the state of eliminating the shield plate, thereby promoting industrial development through technological progress in the field of electrothermal mats. An object of the present invention is to provide an automatic field switching circuit in a heat transfer mat without a shielding plate.

The present invention provides an electric field automatic switching circuit in a heat transfer mat having a heating wire (H) supplied with AC power through first and second AC power lines (AC1) (AC2),

The first switching device (S1) and the second switching device (S2) connected to the heating wire (H) on one side and the other side is connected to the first alternating current power supply line in a branched state with each other, one side in a branched state between each other The third switching device (S3) and the fourth switching device (S4) connected to the hot wire (H) and the other side is connected to the second AC power supply line, the first switching device (S1) and the third switching device Connect (S3) to operate simultaneously and connect so that the second switching device (S2) and the fourth switching device (S4) operate simultaneously;

The microcomputer U1 checks whether an electric field is generated according to a connection state in which an AC plug connected to the first AC power supply line AC1 and the second AC power supply line AC2 is inserted into an AC outlet. When the electric field is generated, the microcomputer U1 simultaneously operates the first switching device S1 and the third switching device S3 to generate electricity through the first switching device S1 and the third switching device S3. When the flow is controlled and the electric field is not generated, the microcomputer U1 simultaneously operates the second switching device S2 and the fourth switching device S4 to operate the second switching device S2 and the fourth switching device. By controlling the flow of electricity through the (S4) is formed so that the electric field can be automatically switched using only the heating wire (H) without a shielding plate.

The present invention can effectively handle the electric field by switching the automatic switching using only the electric flow of the heating wire without using a shielding plate that was essentially used to absorb and block the electric field generated from the heating wire of the heat transfer mat, the shielding plate The electric field automatic switching method that has eliminated this problem is an electric field treatment technology that has never been attempted in the field of electrothermal mats, and provides new electric field treatment technology in the field of electrothermal mats and can promote industrial development through technological progress.

The present invention is a technology for processing by applying the electric field generated from the heating wire to the temperature controller of the heating mat while removing the shield plate, which is essentially used for the existing heating mat can reduce the manufacturing cost of the heating mat according to the removal of the required parts In addition, it can reduce the work process and provide a circuit exhibiting stable operation characteristics.

1 is a circuit diagram showing an example of a form for automatically switching the electric field generated in the heat transfer mat using a conventional shielding plate.
Figure 2 is a circuit diagram showing another example of a form for automatically switching the electric field generated in the heat transfer mat using a conventional shielding plate.
3 is a circuit diagram showing an electric field automatic switching circuit in a heat-resistant mat without a shielding plate according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

Electric field automatic switching circuit in the heat-resistant mat without a shield plate according to an embodiment of the present invention is a heating wire that is supplied with a commercial AC power through the first and second AC power line (AC1) (AC2), as shown in FIG. In the electric field automatic switching circuit in the heat transfer mat having H),

The first switching device (S1) and the second switching device (S2) and the heating wire (1) where one side is contact-connected and the other side is connected to the first AC power supply line (AC1) in a state branched to each other in the heating wire (H), H) has a third switching device (S3) and a fourth switching device (S4) connected to one side and the other side connected to the second AC power supply line (AC2) in a branched state to each other, the hot wire (H) The first switching device (S1) and the third switching device (S3) positioned in mutually opposite directions as a reference to be operated at the same time and the second switching device (S2) and the fourth switching device (S4) to be connected at the same time do.

In this case, the first to fourth switching devices S1 to S4 may include a silicon controlled rectifier (SCR), a triac, a field effect transistor (FET), a gate turn off thyristor (GTO), and an insulated gate bipolar transistor (IGBT). ) Can be used to select any one.

Then, the microcomputer U1 checks whether an electric field is generated according to a connection state in which the AC plug connected to the first AC power supply line AC1 and the second AC power supply line AC2 is inserted into the AC outlet. When the electric field is generated, the microcomputer U1 simultaneously operates the first switching device S1 and the third switching device S3 to operate the first switching device S1 and the third switching device S3. In order to control the flow of electricity, and when no electric field is generated, the microcomputer U1 simultaneously operates the second switching device S2 and the fourth switching device S4 so that the second switching device S2 is operated. And configured to be controlled to form a flow of electricity through the fourth switching device (S4) to be configured to automatically switch the electric field using the flow of electricity through the heating wire (H) without a shielding plate.

An input terminal of the microcomputer U1 is provided with a first signal conversion circuit SC1 connected to the first signal conversion circuit SC1 to check whether an electric field is generated in the heating wire H and to perform a stable signal input. It is preferable that the second signal conversion circuit SC2 is connected to check the electric flow according to the switching operation of S4 and to make a stable signal input.

The output terminal of the microcomputer U1 is connected to the first switch drive circuit SD1 so that the simultaneous switching of the first switching element S1 and the third switching element S3 for the switching process when the electric field is generated is performed stably. In addition, it is preferable that the second switch drive circuit SD2 is connected to the second switching device S2 and the fourth switching device S4 for stable switching when the electric field is not generated.

The microcomputer U1 receives the electrical signals output from the first to fourth switching devices S1 to S4 as inputs, and compares them with a reference voltage to check the first and fourth switching devices S1 to S4. It should be configured to judge the abnormality of).

At this time, when it is detected that any one of the switching elements is abnormal by comparison with the reference voltage, it is configured to immediately cut off the electricity supply to the heating wire (H) through the control by the microcomputer (U1).

The microcomputer (U1) is preferably provided with a control output simultaneous operation prevention circuit (PC1) so that the electric field high output due to the electric field generation and the electric field low output due to the non-electric field is not operated at the same time.

In other words, the control output simultaneous operation prevention circuit PC1 monitors the first switch drive circuit SD1 and if there is a signal, stops the electric field low output, and monitors the second switch drive circuit SD2, if there is a signal. It will stop the high output of the electric field.

When the electric flow is higher than the set value by connecting a poly switch (POLY SW) to the connection portion (output portion of the electric flow) between the second AC power supply line AC2 and the third and fourth switching elements S3 and S4. Even if the microcomputer U1 is not operated, the polyswitch itself may be configured to forcibly cut off the flow of electricity, and may be configured to immediately cut off the electric supply to the heating wire H.

At this time, the poly switch (POLY SW) has a self-recovery function, through which it is possible to reactivate the flow of electricity by performing the connection of the switched off switch again when the flow is less than the set value.

Although not shown, an electric field control output delay circuit is respectively configured at an electric field high output terminal and an electric field low output terminal connected to the output terminal of the microcomputer U1, so that the corresponding output signal is output even if the electric field high output or the electric field low output is output from the microcomputer U1. It can also be configured to make a more stable output operation by allowing the output after a short delay.

Referring to the operation of the automatic field switching circuit in the heat-resistant mat without the shield plate according to the present invention having the above-described configuration as follows.

First, as shown in the example of FIG. 3, one place of the AC outlet is referred to as R and the other is referred to as N, and a connection terminal to which the first AC power supply line AC1 of the AC plug inserted thereto is connected. Is referred to as K and the connection terminal to which the second AC power supply line AC2 is connected is referred to as L.

When connecting the AC plug to the AC outlet to supply electricity to the heating wire (H) of the heating mat,

First, when the connecting terminal K of the AC plug is connected to the insertion port R of the AC outlet, and the connecting terminal L of the AC plug is connected to the insertion port N of the AC outlet, the terminal having the same potential is connected to the grounding wire. The electric field is not generated in the microcomputer U1. The microcomputer U1 recognizes the electric flow of the heating wire H and sends an output command to the second switch drive circuit SD2. Switching control is performed so that the second switching element S2 and the fourth switching element S4 arranged in the diagonal direction are operated at the same time, so that the AC power supplied to the heating wire H is heated with the second switching element S2 and the heating wire. The flow of electricity through (H) and the fourth switching device S4 is formed.

That is, as shown in FIG. 3, the microcomputer U1 controls the switching elements so that an electric flow flowing in the A-side is formed.

Second, if the connection terminal K of the AC plug is connected to the insertion port N of the AC outlet, and the connection terminal L of the AC plug is connected to the insertion port R of the AC outlet, a positive wire is connected to the ground wire. An electric field is generated in (H). The microcomputer (U1) recognizes the electric flow of the heating wire (H) and gives an output command to the first switch drive circuit (SD1), but emits the electric field high output and heats the wire (H). As a reference, switching control is performed to simultaneously operate the first switching element S1 and the third switching element S3 disposed in the diagonal direction, and through this, the AC power supplied to the heating wire H is supplied to the first switching element S1. And an electric flow through the heating wire H and the third switching element S3.

That is, as shown in the example of FIG. 3, the microcomputer U1 controls the switching elements so that an electric flow flowing in the B-side direction is formed.

At this time, the microcomputer U1 stably sends a switching control command by the control output simultaneous operation prevention circuit PC1 so that the electric field high output due to the occurrence of the electric field and the electric field low output due to the absence of the electric field are not simultaneously operated.

Meanwhile, in the microcomputer U1, the first to fourth switching devices S1 to S4 are compared and analyzed by comparing and comparing the electrical signals output from the first to fourth switching devices S1 to S4 used for automatic electric field switching with the reference voltage. It is to determine and check whether or not an abnormality occurs, and when any one of the switching device is detected abnormally cut off the electricity supply to the heating wire (H).

In addition, according to the present invention, even if the microcomputer U1 is not properly operated according to the installation of the polyswitch POLY SW, the polyswitch itself forcibly blocks the flow of electricity if the electric flow is higher than a set value.

AC1: First AC Power Line AC2: Second AC Power Line
H: heating wire S1: first switching element
S2: second switching element S3: third switching element
S4: fourth switching element U1: microcomputer
POLY SW: Polyswitch

Claims (7)

In the electric field automatic switching circuit in the heat transfer mat having a heating wire (H) is supplied to the commercial AC power supply via the first and second AC power supply line (AC1) (AC2),
The first switching device (S1) and the second switching device (S2) connected to the heating wire (H) on one side and the other side is connected to the first alternating current power supply line in a branched state with each other, one side in a branched state between each other The third switching device (S3) and the fourth switching device (S4) connected to the heating wire (H) and the other side is connected to the second AC power supply line side,
Connect the first switching device S1 and the third switching device S3 to operate simultaneously, and connect the second switching device S2 and the fourth switching device S4 to operate simultaneously;
The microcomputer U1 checks whether an electric field is generated according to a connection state in which an AC plug connected to the first AC power supply line AC1 and the second AC power supply line AC2 is inserted into an AC outlet. ,
When an electric field is generated, the microcomputer U1 simultaneously operates the first switching device S1 and the third switching device S3 to flow electricity through the first switching device S1 and the third switching device S3. Is controlled, and when the electric field is not generated, the microcomputer U1 simultaneously operates the second switching element S2 and the fourth switching element S4 to operate the second switching element S2 and the fourth switching element ( S4) by controlling the flow of electricity to form the electric field automatic switching circuit in the heat-resistant mat without a shield, characterized in that configured to automatically switch the electric field using only the heating wire (H) without the shield. The microcomputer U1 of claim 1, wherein the microcomputer U1 receives an electrical signal output from the first to fourth switching devices S1 to S4 as an input, compares the voltage with a reference voltage, and checks the abnormality of the first to fourth switching devices. An electric field automatic switching circuit in a heat transfer mat without a shield, characterized in that configured to determine the presence or absence. The method according to claim 1, wherein a poly switch (POLY SW) is installed at a connection portion between the second AC power supply line AC2 and the third and fourth switching elements S3 and S4 so that the electric flow is greater than or equal to a predetermined value. The electric field automatic switching circuit in a heat-resistant mat without a shield plate, characterized in that configured to forcibly cut off the flow of electricity even if U1) is not operated. The first signal conversion circuit SC1 is connected to the input terminal of the microcomputer U1 to check whether an electric field is generated in the heating wire H and to perform stable signal input. A second signal conversion circuit SC2 is connected to check the electric flow according to the switching operation of the four switching elements S1 to S4 and to make a stable signal input;
The output terminal of the microcomputer U1 is connected to the first switch drive circuit SD1 so that the simultaneous switching of the first switching element S1 and the third switching element S3 for the switching process when the electric field is generated is performed stably. And shielding the second switch drive circuit SD2 so that the simultaneous switching of the second switching element S2 and the fourth switching element S4 for the switching process when the electric field does not occur is made stable. Electric field automatic switching circuit in plateless heat transfer mat. According to claim 1, wherein the microcomputer (U1) is provided with a control output simultaneous operation prevention circuit (PC1) characterized in that the electric field high output according to the generation of the electric field and the electric field low output according to the non-occurrence of the electric field is not configured to operate at the same time, characterized in that Electric field automatic switching circuit in heat transfer mat without shield plate. The method of claim 1,
The first to fourth switching elements (S1 to S4) is an electric field automatic switching circuit in a heat shield mat without a shield, characterized in that any one selected from SCR, triac, FET, GTO, IGBT. The method of claim 1,
Electromagnetic field control output delay circuit configured by the electric field control output delay circuit configured at the microcomputer (U1) output terminal to output the delayed output signal even if the electric field high output or low electric field low output from the microcomputer (U1) Electric field automatic switching circuit on the mat.

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