KR100793018B1 - Apparatus for driving electromagnetic wave shielded heating wire using bedclothing - Google Patents

Abstract

An apparatus for driving electromagnetic wave shielded heating wire using bedclothes is provided to accurately control a temperature in real time by attaching an insulation element to a driving device. An apparatus for driving an electromagnetic shielded heating wire using bedclothes includes a heat generating unit(C), a safety circuit unit(A), a potential check and contact inverting unit(B), a temperature sensing and driving unit(H), a short-circuit detecting circuit unit(K), a temperature setting unit(G), a micro-controller, a reference voltage generating unit, an operation/standby switch, and a display unit. The heat generating unit is equipped with a heater wire and a shield wire formed outside the heater wire to generate heat when power is supplied. The safety circuit unit automatically breaks power supply when an overvoltage occurs in the commercial power. The reference voltage generating unit supplies a reference voltage used as a set value to the micro-controller.

Description

Apparatus for Driving Electromagnetic Wave Shielded Heating Wire Using Bedclothing}

1 is a block diagram of an electromagnetic wave blocking heating line for bedding according to a first embodiment of the present invention

2 is a block diagram of an electromagnetic wave blocking heating wire for bedding according to a second embodiment of the present invention

Figure 3 is a change table of the resistance value according to the temperature of the pure iron used as a heater wire in the electromagnetic wave shielding heating wire for bedding according to the present invention

Figure 4 is a graph of the resistance change according to the temperature of pure iron used as a heater wire in the electromagnetic wave shielding heating wire for bedding according to the present invention

Figure 5 is a block diagram of a drive device for electromagnetic wave shielding heating wire for bedding according to the present invention

Figure 6 is a circuit diagram of a drive device for electromagnetic wave shielding heating wire for bedding according to the present invention

Explanation of symbols for the main parts of the drawings

A: Safety circuit part B: Potential check and ground conversion circuit part

C: heat generating portion E: constant voltage circuit portion

F: Operation control part G: Temperature setting circuit part

K: Short circuit detection circuit H: Temperature sensing and driving part

10: temperature sensing unit 20: heating wire driving unit

30: reference voltage generator 40: operation / standby switch and display unit

The present invention relates to a device for driving electromagnetic wave shielding heating wire for bedding, and in particular, it is possible to precisely control the temperature without using a separate temperature sensor in the vicinity of the heating wire and the heating wire of electric bedding and heating device products, and the whole point of the heating wire or the thermal wire However, when instantaneous overheating due to a partial local short circuit, a short circuit is detected without a separate temperature sensor, and the driving device of the electromagnetic wave shielding heating wire for bedding, which saves energy as heat increases.

In general, electrothermal bedding is heating to a constant temperature by converting electrical energy into thermal energy to generate heat, such as an electric blanket, an electric blanket, an electric mat or an electric carpet.

The heat transfer bedding line is provided with a temperature control device for arranging heating wires at predetermined intervals inside the heat insulating material, and setting the temperature arbitrarily at the end of the heating wire, and adjusting the power supplied to the heating wire to maintain the set temperature. It is composed.

In addition, it was essential for the electrothermal bedding to be equipped with a temperature sensor in the form of a chip at a predetermined position inside the electrothermal bedding to sense the temperature generated by the heating wire and control the temperature supplied to the heating wire. .

However, in the conventional electrothermal bedding, as described above, since the temperature sensor for sensing the temperature is mounted at a specific position of the electrothermal bedding, the temperature sensor does not detect the overall temperature of the bedding, and the temperature sensor is mounted. It senses the temperature at and adjusts the power applied to the electrothermal bedding. Therefore, when the part where the temperature sensor is located is abnormally heated, overlapped or overlapped, the temperature control is abnormally made by sensing the temperature of a part of the electrothermal bedding.

That is, since the temperature is detected by installing a separate temperature sensor separate from the heating wire, not only does not detect the temperature of the entire heating wire caused by a short circuit inside the heating wire, but also does not detect local overheating at an arbitrary position. There was a problem that the control is made abnormally, moreover, if the heating wire is locally overheated or short-circuit and disconnection, there was a problem that a fire and an electric shock may occur.

The present invention is to solve the problems of the conventional electrothermal bedding, the heater wire is made of pure iron, and the outer wire and the metal film is coated on the outer surface can accurately sense the temperature in front of the electrothermal bedding and can block electromagnetic waves It is an object of the present invention to provide a bedding heating wire and an electromagnetic wave blocking heating device for bedding which can cut off the power immediately when abnormal power is supplied, such as an overcurrent being supplied to the heating wire by a total short circuit and a partial short circuit of the heating wire. .

The apparatus for driving electromagnetic wave shielding heating wire for bedding according to the present invention for achieving the above object is provided with a heater wire consisting of a pure iron wire and a shield wire formed on the outside of the heater wire heating unit for generating heat when the power is supplied ; Safety circuit unit to automatically cut off the power supply when overvoltage occurs in commercial power; A constant voltage circuit unit for rectifying and smoothing the commercial power supplied to the heat generating unit to supply DC power to each unit; A potential check and ground converting circuit unit for checking a generation of electromagnetic waves in the heat generating unit and allowing a user to convert earth ground; A temperature sensing and driving unit for sensing and outputting a temperature of the heating unit and supplying the commercial power to the heating unit according to a control signal; A short circuit detection circuit unit for detecting an overall short circuit of the heating unit; A temperature setting circuit unit for setting a heating temperature of the heating unit; Receives signals from the temperature sensing and driving unit and the short circuit detecting circuit unit to detect a state of the heating unit (temperature, short circuit, disconnection, overheating, etc.) and sends a control signal to the temperature sensing and driving unit according to the temperature set by the temperature setting circuit unit. It is characterized in that it is provided with an operation control unit for applying the power supply to the heat generating unit when the error occurs in the heat generating unit.

With reference to the accompanying drawings, the driving device of the electromagnetic wave shielding heating wire for bedding according to the present invention having the characteristics as described above in detail as follows.

First, a heater wire is made of pure iron, and a ground wire and a metal thin film are coated on an outer surface thereof, and the heating wire for bedding materials capable of accurately sensing the temperature on the front surface of the electrothermal bedding and blocking electromagnetic waves has been previously filed by the present applicant. (See Patent Application No. 2006-0098362 and Patent Application No. 2006-0073832).

1 is a block diagram of an electromagnetic wave shielding heating wire for bedding according to the first embodiment of the present invention filed by the present applicant (Patent Application No. 2006-0073832), Figure 2 is a previous application (patent application) 2006-0073832) is a block diagram of an electromagnetic wave shielding heating wire for bedding according to a second embodiment of the present invention.

In addition, Figure 3 is a table showing a resistance change value according to the temperature of the heater wire according to the present invention (patent application 2006-0073832) filed by the present applicant, Figure 4 is a filed application (patent application) by the applicant 2006-0073832) is a graph showing a change in temperature and resistance of a heater wire according to the present invention.

That is, as shown in FIG. 1, the core wire 110 made of copper wire or enamel wire, the first insulating inner shell 120 covered with the core wire outer surface to surround the outer circumferential surface of the core wire 110, and the first wire 1 is a heater wire 130 wound around the outer circumferential surface of the insulating endothelial 120 and a second coated on the first insulating endothelial 120 to surround the outer circumferential surface of the insulating endothelial 120 including the heater wire 130. Insulating inner layer 140, the ground wire 150 wound around the outer circumferential surface of the second insulating inner shell 140, and the second insulating inner shell 140 to surround the second insulating inner shell 140 including the ground line 150. 140) the insulating metal thin film 160 is coated on the circumferential surface.

Here, the heater wire 130 is formed of pure iron (Fe) having a purity of 99.9% or more, and the first and second insulating inner skins 120 and 140 are made of a material such as nylon or teflon as an insulating material.

Meanwhile, in the electromagnetic wave shielding heating wire for bedding according to the second embodiment of the present invention, all components are the same as those of the first embodiment of the present invention of FIG. 1, but the ground wire 150 is not wound on the second insulating inner shell. The length of the second insulating inner layer 140 and the metal thin film 160 may be formed along the heating line. That is, the ground wire 150 is formed on the outer circumferential surface of the second insulating endothelial 140 in the longitudinal direction of the heating wire, and the metal thin film 160 is the second insulating endothelial 140 including the ground wire 150. It is wound so as to overlap the outer circumferential surface of).

3 and 4, since pure iron is used as the heater wire 130, the resistance change according to temperature has a constant slope. Therefore, the temperature of a heating line can be measured correctly.

In addition, since the pure iron has a relatively small change in resistance (slow gradient) according to temperature change, energy is saved as the heat increases.

In the above, the contents of the prior application (Patent Application No. 2006-0098362) is not shown, but the heating line of Patent Application No. 2006-0098362 is also applied to the present invention.

Referring to the driving device of the electromagnetic wave shielding heating wire for bedding according to the present invention for driving the heating wire configured as described above.

Figure 5 is a block diagram of a drive device of the electromagnetic wave blocking heating wire for bedding according to the present invention, Figure 6 is a circuit diagram of a drive device of the electromagnetic wave blocking heating line for bedding according to the present invention.

The apparatus for driving electromagnetic wave shielding heating wire for bedding according to the present invention, as shown in FIG. 5, has a heating wire made of pure iron and generates heat when power is supplied (C) of FIG. 1 or FIG. 2. Configuration), a safety circuit section (A) that automatically cuts off the power supply when overvoltage occurs in the commercial power supply, and a potential check and ground conversion circuit section for checking that electromagnetic waves are generated in the heating section (C) and converting the earth ground. (B), a constant voltage circuit unit E for rectifying and smoothing the commercial power supplied to the heat generating unit C, and supplying DC power to each unit, and sensing and outputting the temperature of the heat generating unit C and controlling the same. A temperature sensing and driving unit H for supplying the commercial power to the heat generating unit C according to a signal, a short circuit detecting circuit unit K for detecting an overall short circuit of the heat generating unit C, and the heat generating unit C Temperature setting circuit section (G) And detecting a state (temperature, short circuit, disconnection, overheat, etc.) of the heat generating unit C by receiving a signal from the temperature sensing and driving unit H and the short circuit detecting circuit unit K, and setting the temperature setting circuit unit G. It is provided with a calculation control unit (F) for applying a control signal to the temperature sensing and driving unit (H) according to the temperature set at and cut off the power supplied to the heating unit (C) when an error occurs in the heating unit (C) It is configured by.

Referring to FIG. 6, the circuit configuration of each part of the driving device for the electromagnetic wave shielding heating wire for bedding according to the present invention configured as described above is as follows.

The heat generating portion C is composed of a heating wire having core wires and heater wires 3 and 5 and a ground wire (shield wire) 33 as described in FIGS. 1 and 2 and Patent Application 2006-0073832. do. Therefore, the core wire 3 and the heater wire 5 constituting the heat generating unit C are not directly connected to each other, and power is independently supplied.

The safety circuit unit A includes the power switch PWS, a fuse, an overcurrent protection thermistor PTC, a limit resistor R21, a power display lamp PL, and the like. When turned on, the power display lamp PL emits light to indicate that commercial power is supplied. When overvoltage occurs in the commercial power, the fuse is blown to automatically cut off the commercial power, and an overcurrent greater than the rated current. When the thermistor (PTC) has a high resistance to cut off the current.

The potential check and ground conversion circuit unit B includes resistors R1, R2, R4, R6-R8, variable resistor VR2, lamp LP, switch SW1, and the like. When the electromagnetic field or the magnetic field is generated in the lamp (LP) is turned on, which means that the electromagnetic wave is generated in the heat generating portion (C), at this time when the user switch the switch (SW1) the safety circuit portion (A) The input lines of the plugs AC1 and AC2 of the < RTI ID = 0.0 >) < / RTI >

That is, when the switch SW1 is switched while the lamp LP is turned on, the shield wire 33 of the heat generating part C is grounded with the earth even if the positions of the plugs AC1 and AC2 are not changed. Electromagnetic waves do not occur.

The constant voltage circuit unit E includes a capacitor C4-C6, diodes D3 and D4, a zener diode ZD1, resistors R18 and R19, a constant voltage element REG, and the like to rectify the commercial power source. And smooth to supply a DC power supply to each part.

The temperature setting circuit part G includes resistors R10, R13, and R15, a temperature setting variable resistance VR1, a capacitor C2, and the like, and varies the resistance value of the temperature setting variable resistor VR1. Set the temperature.

The short-circuit detection circuit portion K is composed of a cent resistance CTR, a diode D5, a resistor R9, and a short-circuit detection IC U1 composed of a light emitting element and a light receiving element, and the like. Detects and outputs a short circuit condition. That is, when the heat generating unit C operates normally, the light emitting element of the short detection IC U1 emits light, and thus outputs a “HIGH” signal. If the light emitting unit C is shorted, the cent resistance CTR Since the voltage at both ends becomes "zero volt" and the light emitting element of the short detection IC U1 does not emit light, the short detection IC U1 outputs a "LOW" signal.

The temperature sensing and driving unit H includes a temperature sensing unit 10 and a heating line driver 20.

The temperature sensing unit 10 includes a heat radiation type thermal sensor TH, a capacitor C3, and resistors R5 and R16 to sense and output the temperature of the heat generating unit C. That is, the resistance is variable according to the temperature of the heat generating unit C, and the input voltage is correspondingly outputted.

The heating line driver 20 includes a diode D1, a thyristor SCR, a resistor R11, and a zero crossing gate driver U3, according to a control signal of the operation control unit F. The commercial power is supplied to the heat generating unit C to heat the heat generating unit C.

The arithmetic and control unit F is composed of a microcontroller U2, a reference voltage generator 30, an operation / standby switch and a display unit 40.

The reference voltage generator 30 includes a zener diode REF, a resistor R17, a capacitor C7, a variable resistor VR3, and the like, according to the resistance value of the variable resistor VR3. Generate a reference voltage at U2).

The operation / standby switch and the display unit 40 are composed of a tact switch SW2, a resistor R20, and a light emitting diode LED. The tact switch SW2 is a switch that is turned on by a user. Whenever, the microcontroller U2 drives the heating unit C or makes it stand by and displays the state on the light emitting diode LED.

When the tact switch SW2 is turned on in the initial state, the microcontroller U2 compares the signal of the temperature setting unit G with the signal of the temperature sensing unit 10 to the heating line driver 20. Outputs a high signal to drive the heat generating unit (C). At this time, if the short circuit of the heat generating unit C is detected in the short circuit detecting circuit unit K, or the voltage is detected above the predetermined value in the temperature sensing unit 10 or the voltage is not detected at all, the heating line is In response to determining that the circuit is shorted or disconnected, a low signal is output to the heating line driver 20 to stop driving of the heating unit C.

In addition, the microcontroller (U2) is provided with a timer to cut off the commercial power when the power switch (PWS) is turned on for a predetermined time or more.

Referring to the operation of the electromagnetic wave shielding heating line device for bedding according to the present invention configured as described above are as follows.

When the power plug is plugged into the commercial power plug and the power switch PWS of the safety circuit unit A is turned on, the commercial power supply AC 220V is supplied to the heating unit C and the constant voltage circuit unit E. The constant voltage circuit unit E rectifies and smoothes the commercial power to supply DC power to each part. At this time, the power display lamp PL of the stable circuit unit A emits light to indicate that commercial power is supplied to the driving circuit of the electromagnetic wave blocking heating line for bedding.

In addition, the microcontroller U2 of the operation control unit F is operated by the DC power supplied from the constant voltage circuit unit E. FIG.

At this time, when the user touches the operation / standby switch and the tact switch SW2 of the display unit 40, the microcontroller U2 of the operation control unit F outputs a high signal to the terminal F2. Then, since the zero crossing gate driver U3 of the heating line driver 20 applies a high signal to the gate terminal of the thyristor SCR in synchronization with the zero crossing of the commercial power source, the commercial power source is supplied to the heating unit C. Is supplied to the heat generating unit C.

At this time, the operation control unit F outputs a high signal to the terminal F6 to emit the light emitting diode LED, thereby indicating that the temperature sensing unit 10 and the short circuit detecting circuit unit K are operating. .

When the user sets the temperature by varying the resistance value of the variable resistor VR1 of the temperature setting unit G, the heat radiation type thermal sensor TH installed in the temperature sensing unit 10 of the temperature sensing and driving unit H is set. Since the resistance varies according to the temperature of the heating unit C, the temperature sensing unit 10 converts the input voltage and inputs it to the operation control unit F.

The operation control unit F compares the voltage according to the temperature set by the temperature setting unit G with the voltage input by the temperature sensing unit 10 to the voltage value set by the temperature setting unit G. The control signal (high or low signal) is output to the heating line driver 20 to the output terminal F2 such that the voltage input from the sensing unit 10 approaches.

That is, the operation controller F outputs a high signal to the output terminal F2 when the temperature (voltage) detected by the temperature sensing unit 10 is lower than the temperature (voltage) set by the temperature setting unit G. The heating unit C generates heat by the above-described method, and if the temperature (voltage) detected by the temperature sensing unit 10 is equal to or higher than the temperature (voltage) set by the temperature setting unit G, the output terminal ( A low signal is output to F2) to control the heat generation unit C not to generate heat.

In this state, the short circuit detecting circuit unit K detects and outputs a short circuit state of the heat generating unit C. That is, if the heat generating unit C operates normally, the short circuit detecting circuit unit K outputs a high signal, and if the light emitting unit C is shorted, a low signal is output.

Therefore, the calculation control unit F outputs a control signal as described above if a short circuit is not detected in the short circuit detecting circuit unit K. If the detection control unit F detects a short circuit, the operation control unit F outputs the output terminal F2. By outputting a low signal to the temperature sensing and driving unit (H) to cut off the commercial power supplied to the heating unit (C).

In addition, when the voltage sensed by the temperature sensing unit 10 is equal to or higher than a set value or no voltage is detected, it is determined that a short or disconnection is generated in the heat generating unit C, and the operation control unit F output terminal. A low signal is output to (F2) so that the temperature sensing and driving unit (H) cuts off commercial power supplied to the heat generating unit (C).

When it is determined that the abnormality occurs in the heat generating unit C as described above, the operation control unit F outputs a pulse signal to the output terminal F6 so that the light emitting diode blinks at about 1 second intervals.

In addition, since the operation controller F includes a timer in the microcontroller U2, when the tact switch SW2 is touched while the power switch is turned on, if the user continues for a predetermined time (about 10 hours), It is determined to go out in the bedding state turned on, outputs a low signal to the output terminal (F2) to cut off the commercial power supplied to the heating unit (C), and outputs a pulse signal to the output terminal (F6) Since the light emitting diodes (LEDs) blink at intervals of about 3 seconds, the LEDs indicate to the user that power is cut off although no abnormality is generated in the heat generating unit (C).

In this state, when the user touches the tact switch SW2, the operation control unit F outputs a low signal to the terminal F2 to standby the temperature sensing unit 10 and the short circuit detecting circuit unit K. Shall be.

In addition, even if electromagnetic waves are generated in the heating wire for bedding, it detects them and connects the shield wire of the heating wire to an earth ground terminal to block the electromagnetic waves. That is, when the lamp LP of the potential check and ground conversion circuit unit B is turned on to indicate that electromagnetic waves are generated, the switch SW1 is switched to connect the shield wire of the heating wire to the ground terminal, and the lamp LP ) Is turned off to indicate that no electromagnetic wave is generated.

In the driving device of the electromagnetic wave shielding heating wire for bedding according to the present invention as described above has the following effects.

First, since the heating wire for beddings according to the present invention is composed of a pure iron heater wire resistance changes in accordance with the temperature change, it is possible to attach the insulated device to the driving device without using a separate temperature sensor wire to perform accurate temperature control in real time. Since the pure iron has a relatively small change in resistance (slow gradient) with temperature change, energy is saved as the heat increases.

Second, since the temperature can be detected throughout the heating wire and the short circuit and disconnection can be detected throughout the heating wire, if the power supply is abnormally supplied, such as overcurrent or short circuit, the power supply is cut off immediately, resulting in overheating, fire and electric shock. To prevent them in advance and to use bedding more safely.

Third, since the ground wire and the metal thin film are coated on the outer surface of the pure iron heater wire and the ground wire is indirectly grounded with the earth, induction current is not generated in the heating wire, thereby preventing electromagnetic waves.

Fourth, since the temperature detection unit of the heating wire detects that the voltage is higher than the set value and the short circuit detection circuit unit detects the short circuit, the short circuit of the heating wire can be detected in multiple times, and thus the bedding can be safely used from overheating of the heating wire.

Claims (8)

delete delete delete delete delete A heating unit having a heater wire composed of a pure iron wire and a shield wire formed at an outer side of the heater wire, and generating heat when power is supplied; A safety circuit unit which emits a power indicator lamp when the power switch is turned on to indicate that commercial power is supplied, and automatically cuts off the power supply when an overvoltage occurs in the commercial power; A constant voltage circuit unit for rectifying and smoothing the commercial power supplied to the heat generating unit to supply DC power to each unit; Checking that electromagnetic waves are generated in the heating unit by lighting the lamp according to the electric field or the magnetic field of the lamp connected to the shield wire of the heating unit, and changing the power input line of the safety circuit unit to the earth ground side by the user switching of the switch. A potential check and ground conversion circuit unit for converting the safety circuit unit to earth ground; A temperature sensing unit connected to the heater wire of the heating unit and having a heat dissipation type thermal sensor and a condenser for sensing a heating temperature of the heater wire, and outputting an input voltage to a microcontroller according to the temperature of the heating unit; A zero crossing gate driver operating in synchronization with zero crossing of a commercial power source according to a control signal from a microcontroller, a diode and a thyristor operable to supply power to the heat generating unit by an operation of the zero crossing gate driver, A heating wire driving part supplying commercial power to the heating part; A cent resistance connected to both ends of the heater wire of the heat generating unit, a diode connected to both ends of the cent resistor and emitting light according to whether the heater wire is shorted, and a light emission from the diode is received to calculate a level signal according to whether the heat generating unit is short-circuited A short circuit detection circuit unit including a short circuit detection IC output to a control unit and detecting an entire short circuit of the heat generating unit; A temperature setting circuit unit for setting a heating temperature of the heating unit; The control signal for driving the heating unit is output to the heating line driver by comparing the signal of the temperature setting unit with the temperature sensing signal of the temperature sensing unit, and the short circuit detecting circuit unit detects a short circuit of the heating unit, or the temperature sensing unit A micro controller which determines that an error has occurred in the heat generating unit when the voltage is detected above a predetermined value or no voltage is detected, and cuts off the power supplied to the heat generating unit; A reference voltage generator supplying a reference voltage which is a set value to the microcontroller; And Equipped with a tact switch and a light emitting diode to allow the user to selectively select the driving of the heating unit, and the operation / standby switch and the display unit for displaying the driving state and error of the heating unit is characterized in that the electromagnetic wave blocking heating line for beddings Drive. The method of claim 6, The micro-controller is provided with a timer for driving the electromagnetic wave blocking heating line for beddings, characterized in that the commercial power source is cut off when the heating unit is driven for a predetermined time or more. The method of claim 6, The heating unit further includes a core wire separate from the heater wire, The heater wire and the core wire is not directly connected to each other, the driving device of the electromagnetic wave blocking heating line for beddings, characterized in that the power is supplied and driven.

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