KR100845693B1 - Temperature control circuit - Google Patents

Abstract

A circuit for detecting and adjusting temperature in heat lines for an electronic mat is provided to execute simultaneously temperature detection and heating by implementing an NTC(Negative Temperature Coefficient) thermistor resin between three heat lines. A circuit for detecting and adjusting temperature includes a voltage supply adjusting unit(100), a temperature detecting unit(300), a trigger controlling unit(200), and a control rectifier(30). The voltage supply adjusting unit controls the supply of voltages base on detected temperature. The temperature detecting unit compares a reference voltage with voltages based on the detected temperature between first and second lines and/or first and third lines, and generates a temperature control signal. The trigger controlling unit generates a trigger signal and controls the trigger operation. The control rectifier is connected to the trigger controlling unit. One end of the second and third lines is connected to a source voltage and the other end is connected to an anode of the control rectifier. The voltage supply adjusting unit detects at least one of impedance between the first and second lines or the first and third lines and detects an electrical temperature signal.

Description

Electromagnetic shielding 3-wire temperature detection and control circuit {Temperature control circuit}

The present invention relates to a non-electromagnetic wave thermostat of a bedding heating wire which enables heating and temperature detection without electromagnetic leakage in a heating wire used for a heater such as an electric blanket, an electric mat, an electric mat, an electric bedding machine, an electric steamer, and a method thereof. In more detail, the present invention relates to the detection of temperature impedance changes of NTC thermistors in a three-wire NTC thermal line, a temperature control method, and a temperature controller using the same.

In human sleep, bedside ambient conditions such as temperature and humidity serve as important requirements, and in general households, electric bedding, heaters, etc. in order to maintain the bed temperature properly, electric blankets, mats, electric mattresses, and electric steamers. I use a lot. The heating bedding, the heater is built in a heating wire, the power supply to the heating wire generates heat. Therefore, it is essential to configure a thermostat that senses the temperature around the heating wire and controls the power supply accordingly.

Conventional heating wire, temperature controller for heating it, and temperature control method should use a separate temperature sensor for temperature sensing, and additionally equipped with a temperature contact switch or bimetal electrical contact to prevent abnormal temperature rise, And the abnormal temperature rise was controlled. Since the conventional method uses separate temperature sensors and bimetals, it is difficult to parallel electric and magnetic fields. Therefore, the number of separate shields and other parts and the number of production processes for electric and magnetic fields are increased. have.

Therefore, there is a need for a temperature control method and a temperature control device that are easy to detect and control temperature without using a bimetal electrical contact.

※ Invention No. 10-2007-122457, the invention of which this domestic priority claim is the original application, was decided on February 26, 2008, and this domestic priority claim application adds the dependent claims of claim 5 to the contents of the above application. Specific or limited to the above. The description added in the National Priority Claim Application adds a description of the above claims and the theory of the existing claims.

The present invention has been made to solve the above problems, by using the NTC thermistor resin between the three heating wires instead of a separate temperature sensor using three heating wires, the heating wire and the temperature sensor is not separated at the same time temperature detection It is an object of the present invention to provide a temperature control method and a temperature controller capable of overheating.

In addition, in the present invention, heating is performed by using two of the three wires so that the heating current flows in the opposite direction to cancel the magnetic field, and the remaining one wire has a temperature voltage by the NTC thermistor due to interaction with the two heating wires. It is an object of the present invention to provide a temperature control method and a temperature controller to enable detection as a whole, as well as local temperature sensing and temperature overheating prevention.

In the configuration of the present invention for achieving the above object, in the temperature detection and temperature control circuit in which three wires are connected to a heating wire arranged with an NTC thermistor interposed therebetween, The first line is the detection line, the second line and the third line are interconnected at each end so that the heating current is turned to the third line when the heating current is input to the second line, and the temperature signal voltage which controls the supply of the temperature signal voltage. Supply control unit; A temperature detector for outputting a temperature control signal by comparing a temperature signal voltage output between the first line and the second line and / or between the first line and the third line with a reference voltage; A trigger combination and generator for generating a trigger signal and controlling this operation; And a control rectifier connected to the trigger coupling and generation unit, wherein a cathode of the control rectifier is connected to a power supply, and one end of one of the second or third lines is connected to a power supply, and the other end of the control rectifier is connected to a power supply. Is connected to an anode of the control rectifier, and the temperature detector detects at least one of an impedance value between the first line and the second line or a change in the impedance value between the first line and the third line to generate a heating temperature. And detecting a proportional electric temperature signal.

A temperature detection and temperature control circuit in which three wires are connected to a heating wire arranged with an NTC thermistor interposed therein, wherein the three wires of the heating wire are the first wire and the second wire and the third wire. A line is connected to each other at an end so that a heating current is turned to a third line when the heating current is input to the second line, and a temperature signal voltage supply adjusting unit which controls supply of a temperature signal voltage; A temperature detector for outputting a temperature control signal by comparing a temperature signal voltage output between the first line and the second line and / or between the first line and the third line with a reference voltage; A trigger combination and generator for generating a trigger signal and controlling this operation; And a control rectifier connected to the trigger coupling and generation unit, wherein an anode of the control rectifier is connected to a power supply, and one end of one of the second or third lines is connected to a power supply, and the other end of the control rectifier is connected to a power supply. Is connected to the cathode of the control rectifier, and the temperature detector detects any one or more of an impedance value between the first line and the second line or an impedance value change between the first line and the third line to generate a heating temperature. And detecting a proportional electric temperature signal.

A temperature detection and temperature control circuit in which three wires are connected to a heating wire arranged with an NTC thermistor interposed therein, wherein the three wires of the heating wire are the first wire and the second wire and the third wire. The line interconnects the ends so that a heating current is turned to a third line upon input to the second line, and the third line is insulated from the second line, and the temperature signal voltage controls the supply of the temperature signal voltage. Supply control unit; A temperature detector for outputting a temperature control signal by comparing the temperature signal voltage output between the first line and the second line with a reference voltage; A trigger combination and generator for generating a trigger signal and controlling this operation; And a control rectifier connected to the trigger coupling and generation unit, wherein a cathode of the control rectifier is connected to a power supply, and one end of one of the second or third lines is connected to a power supply, and the other end of the control rectifier is connected to a power supply. Is connected to the anode of the control rectifier, characterized in that the temperature detection unit detects the change in the impedance value between the first line and the second line to detect an electrical temperature signal proportional to the heating temperature.

A temperature detection and temperature control circuit in which three wires are connected to a heating wire arranged with an NTC thermistor interposed therein, wherein the three wires of the heating wire are the first wire and the second wire and the third wire. The line interconnects the ends so that a heating current is turned to a third line upon input to the second line, and the third line is insulated from the second line, and the temperature signal voltage controls the supply of the temperature signal voltage. Supply control unit; A temperature detector for outputting a temperature control signal by comparing the temperature signal voltage output between the first line and the second line with a reference voltage; A trigger combination and generator for generating a trigger signal and controlling this operation; And a control rectifier connected to the trigger coupling and generation unit, wherein an anode of the control rectifier is connected to a power supply, and one end of one of the second or third lines is connected to a power supply, and the other end of the control rectifier is connected to a power supply. Is connected to the cathode of the control rectifier, characterized in that the temperature detection unit detects the change in the impedance value between the first line and the second line to detect an electrical temperature signal proportional to the heating temperature.

In the second line and the third line, one end of any one of the second line or the third line is connected to a one-way rectifier, and a heating current is input to the second line through the one-way rectifier. The U-turn to the third line is characterized in that.

It is characterized by using any one of the said 1st line or the said 3rd line for a shield.

The line used for the shield is characterized in that the thin film form is located outside the other two lines.

The first wire is used for the shield, and the first wire used for the shield is characterized in that only one end is connected to the power supply side.

The trigger coupling and generating unit includes: a discharge trigger resistor, a charge control resistor and a capacitor, wherein the discharge trigger resistor turns on the control rectifier while the capacitor is discharged, and the charge control resistor controls the charge amount of the capacitor. It is characterized in that it is intended to.

The trigger coupling and generation unit includes: a discharge trigger resistor, a charge control resistor, a capacitor, a transistor, and a charge / discharge capacitor, wherein the charge / discharge capacitor is connected between the first line and the second line, and the transistor is connected to the charge. A discharge capacitor is connected between the discharge trigger resistor and the discharge trigger resistor is for turning on the control rectifier while the capacitor is discharged, and the charge control resistor is for controlling the charge amount of the capacitor.

The temperature detector may further include a matching resistor that connects the first line and the second line or connects the first line and the third line.

The temperature detector may further include a matching resistor that connects the first wire and the second wire.

The temperature detector may further include a constant voltage diode connected to the first line.

The temperature detecting unit may further include a rectifying diode between the first line and the constant voltage diode.

The temperature detecting unit may further include a rectifying diode connected to the first line.

The temperature detecting unit may further include a photocoupler connecting between the first line and the second line or connecting between the first line and the third line.

The temperature detecting unit may further include a photo coupler connecting the first line and the second line.

And a pulse width adjustment generation circuit unit for controlling and controlling a pulse width by a time division set when the signal voltage is applied to the temperature detection unit. The trigger coupling and generation unit receives a signal from the pulse width adjustment generation circuit unit and generates a heating current. It characterized in that to energize.

A pulse width adjustment generating circuit unit controlling and controlling a pulse width by a time division set when a signal voltage is applied to the temperature detection unit; And a switching unit configured to receive a signal from the pulse width control generation circuit unit and conduct a heating current.

The temperature signal voltage supply control unit includes a variable resistor and a fixed resistor, and the variable resistor and the fixed resistor are connected in series.

The trigger coupling and generation unit may further include an overcurrent limit resistor connected to the transistor, wherein the overcurrent limit resistor is configured to control a discharge time of a charge / discharge capacitor.

The trigger coupling, generating unit: a charge limit resistor; And a control rectifier element, wherein the charge limit resistor is connected between the discharge trigger resistor and the capacitor side and the anode of the control rectifier element.

The trigger coupling, generating unit: a charge limit resistor; And a control rectifying element, wherein the transistor comprises: a base and an emitter connected to a temperature detector side, and the charge limit resistor is connected between a discharge trigger resistor and a capacitor side and an anode of the control rectifier element.

When the signal voltage is applied to the temperature detection unit, the pulse width adjustment generating circuit unit for controlling the pulse width by controlling the set time division further comprises: The pulse width adjustment generating circuit unit: the pulse width is adjusted through the volume, the The heating power is controlled by adjusting the volume.

When the signal voltage is applied to the temperature detector, the pulse width control generation circuit unit for controlling the pulse width by controlling the set time division further comprises: The pulse width control generation circuit unit divides the power supply synchronous frequency according to the set counter division conditions And a microcomputer controller for controlling the microcomputer, wherein the microcomputer controller controls the pulse generation and the pulse width by dividing the power synchronous frequency, the high temperature side temperature control is fixed, and the low temperature side is controlled by the pulse width control oscillator circuit. It is characterized in that automatically adjusted according to.

The pulse width control generation circuit unit may include: a photocoupler for insulation, and read a temperature signal voltage through the photocoupler, or trigger a gate of the control rectifier.

The photocoupler is characterized in that it is operated with zero voltage crossing.

The present invention has the effect of controlling the temperature and preventing the temperature increase without separately configuring the temperature sensor and the temperature increase prevention device using a power supply AC voltage as a three-wire heating wire structure of a simplified structure.

In addition, the present invention does not need to use a separate temperature sensor and temperature-resistant bimetal for heat transfer bedding, so that it is easy to cut off electric pollution, that is, electromagnetic waves, etc. Has an effect.

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

1 is a view showing a configuration according to an embodiment of the present invention. 1, a fuse (not shown) and a power switch (not shown) are connected to a power supply side, and a temperature signal voltage supply control unit 100, a trigger combination, and a generator 200 are connected in parallel.

The control rectifier 30 is connected between the trigger coupling, the generator 200 and the tip of the first line 1. The control rectifier 30 mainly uses the SCR, the trigger coupling, the generator 200 is connected to the gate side.

The heating wire 10 is provided with first, second, and third lines 11, 12, and 13 at its center, between the first line 11 and the second line 12, and between the first line 11 and the third line. An NTC thermistor 14 (plastic nylon NTC temperature sensor) is arranged between the lines 13. The NTC thermistor 14 may be positioned between the second wire 12 and the third wire 13, but may be insulated.

In the NTC thermistor (Negative Temperature Coefficient Thermistor), in which the resistance value decreases as the temperature increases, the second and third wires 12 and 13 are locally overheated, or the NTC thermistor 14 is broken and the first wire 11 is broken. When the second and third wires 12 and 13 are shorted, the impedance value of the NTC thermistor 14 decreases rapidly while reaching the preset temperature control point, and the voltage is turned on the NTC thermistor 14 to make a U-turn. The signal voltage does not come to the temperature detector, or the voltage is reduced and transmitted. In this case, while the control rectifier 30 (SCR) is turned off, the trigger signal is not generated, and the supply of the heating current is stopped.

Outside the lines, sheaths and shields are formed. In some cases, shields or sheaths may be added or removed. The second line 12 and the third line 13 are configured such that the rear ends thereof are connected to each other, and return to the third line 13 or flow in the opposite direction when the second line 12 is input to the second line 12.

The temperature detector 300 is connected to one end of the first line 11 and the second line 12 or one end of the first line 11 and the third line 13. In the drawing, it is indicated as being connected to the second line 12. The temperature detector 300 includes or connects an NTC thermistor, and includes a resistor 310 therein as a temperature detection resistor or a gate bias resistor therein.

The temperature detector 300 includes the NTC thermistor 14 of the heating wire 10 and the temperature signal between the first wire 11 and the second wire 12 or the first wire 11 and the second wire 12. Between and the temperature signal values of the first line 11 and the third line 13 are detected. The temperature detector 300 is connected to the trigger coupling and generation unit 200 and sends the detected temperature signal value to the trigger coupling and generation unit 200. Temperature signal detection output method operation is that when the AC power supply voltage is connected in series to the first line 11 of the heating wire 10 through the resistor 110 and the variable resistor 120, the temperature signal AC current is resistance 110, variable Heating wires through the NTC1 thermistor between the first and second wires 11 and 12 in parallel with the resistor 120 and the NTC2 thermistor between the first and second wires 11 and 3; It flows in three lines.

At this time, when the second and third wires are heated, the NTC1 thermistor between the first wire 11 and the second wire 12 and the NTC2 thermistor AC impedance between the first wire 11 and the third wire 13 are lowered. The AC signal value at both ends between the first line, the second line, and the third line is equally lowered in proportion to the temperature signal alternating current value flowing through the temperature signal, so that the temperature signal voltage is lowered in the first line 11 and the second line 12 or the first line. It is output by selection between the line 11 and the third line 13. The output temperature signal value is output as a combined value of the NTC1 thermistor and the NTC2 thermistor in parallel.

Here, if any part of the entire length of the heating wire 10 is locally overheated, that is, if the abnormal temperature is overheated, the temperature increase signal voltage for the heating wire 10 is also displayed, so that the average temperature change value of the heating wire 10 and the temperature overheating value of the heating wire 10 are simultaneously Since the output power is controlled by using the signal value, the heating controller 10 is configured with a temperature controller to operate the thermal cut-off device, thereby eliminating the need for a separate temperature sensor or the thermal cut-out bimetal.

The temperature detector 300 detects the temperature signal voltage generated by the temperature signal voltage supply control unit 100 and compares the temperature signal voltage with a reference voltage. During the positive half-cycle for temperature detection, the temperature signal voltage detected by the temperature detection unit 300 is compared with the reference voltage, and when the temperature signal voltage is higher than the reference voltage, the SCR 420 of the triggering unit 200 is generated. ON When the SCR 420 is turned on, the current is coupled to the trigger, and the charge amount control resistor 230 of the charge amount control unit 230 of the generation unit 200 is charged, and the charge potential amount of the capacitor 220 is the charge current limit resistor 410. It is determined by the resistance value of).

The control rectifier 30 may be connected in the reverse direction as well as the forward direction. Claims 1 and 3 show the connection relationship when the control rectifier 30 is connected in the forward direction, and claims 2 and 4 show the connection relationship when the control rectifier 30 is connected in the reverse direction. This connection relationship is optionally applicable, and specific embodiments related to the reverse connection are shown in FIGS. 24, 25, 29, 30, and 35.

2 is a view showing a configuration according to another embodiment of the present invention. Referring to Figure 2, the configuration of claims 1 to 4 may be configured in this way, the trigger coupling, the generator 200 and the control rectifier 30 in the same direction as the temperature signal voltage supply control unit 100 in the power supply side Can be placed on.

The difference between the circuit configuration of FIG. 1 and FIG. 2 differs in the electric field interruption rate when the first wire or the third wire is used as the shield wire. When configured as shown in Figure 1, the electric field blocking rate is low, when configured as shown in Figure 2, it is possible to increase the electric field blocking rate. For example, when the third wire 13 is used as the shield wire in the circuit configuration as shown in FIG. 1, the electric field is hard to be completely blocked. If the length of the heating wire is short, the blocking rate is very high, but if the length is longer, a heating current flows through both ends of the third wire 13, and the voltage V = I proportional to this current value and the internal resistance of the third wire 13 shielding wire. This is because x R x 1.4 (AC peak) appears, which can be reduced to 50% or less.

In the case of the circuit configuration as shown in FIG. 2, when the first wire 11 is used as a shield wire and connected to the ground at the same time, the current flowing through the first wire 11 is only a temperature detection current, and this temperature detection current is 1. Since it is equal to or less than 1, the potential across the first line 11 approaches 0V, so this current is ignored so that the electric field can be blocked 100%.

That is, when configured to make a difference as shown in Figs. 1 and 2, there is a difference in the electric field blocking effect as the heating current flows through the shield wire or not. Notwithstanding this difference, of course, functional operations such as temperature detection, heating operation, and sequence are the same.

Meanwhile, when the control rectifier 30 is shorted, the capacitor 20 serves to short-circuit the power fuse by flowing a short current, and the one-way rectifier 20a performs the same operation as the U-turn rectifier diode. Directional diodes for classifying the temperature detection currents respectively. By the one-way rectifier 20a, only the heating current can flow through the second and third lines.

In addition, any one of the first wire 11 or the third wire 13 may be used as the shield wire. In the configuration as shown in FIG. 1, the third wire 13 may be the shield wire, and as shown in FIG. In the configuration, the first wire 11 may be a shield wire. If the third wire 13 is used as the shield wire in FIG. 2, the magnetic field-free heating operation is possible, but the electric field cannot be blocked, and if the second wire 12 is the shield wire, it has the same electric field blocking rate as in FIG. 1. do. Specific examples of using any one line as the shield line will be described in more detail below.

3 is a view showing various embodiments of the three-wire heating wire used in the present invention, Figure 4 is a view showing each cross section of the heating wire of FIG. Referring to FIGS. 3 and 4, (a) is a first line 11 wound around a seal 11a such as a synthetic resin in the center, an NTC thermistor 14 wrapped around the outside thereof, and a second line ( 12) and the third wire 13 is parallel to the heating wire system wound side by side so as not to contact each other. In this case, the second wire 12 and the third wire 13 are spaced apart from each other so that only the NTC thermistor 14 is in contact with each other. In some cases, as in Claims 3 and 4, it is also possible to cover and insulate either the second wire 12 or the third wire 13. This will be described in detail with reference to FIGS. 27 to 30 below.

The first line 11, the second line 12, and the third line 13 are in contact with the NTC thermistor 14, and the first line 11, the first line with the NTC thermistor 14 in cross section. The second line 12 and the third line 13 are arranged in a triangular composition. In principle, the second line 12 and the third line 13 are also connected by an NTC thermistor. However, in some cases, the insulator 15 is provided, so that the second line 12 and the third line 13 are provided. It is preferable to prevent these short circuits.

In (a), a synthetic resin ventricle 11a is disposed at the center, and the first wire 11 is wound in a spiral around the ventricle 11a, and an NTC thermistor 14 is wound on the outer side thereof. At regular intervals, the second line 12 and the third line 13 are wound spirally. In the past, it was very difficult to arrange two conductors on the same layer as shown in the drawing due to inadequate conduction winding technology.However, in recent years, the winding technology has been improved, and two conductors are arranged in the same layer by precisely adjusting the separation interval. This is possible, which has the effect of reducing the thickness of the heating wire.

(b) is substantially the same as the above (a), but is an embodiment in which the first wire 11 is placed in the center alone without sensing the ventricles.

(c) is a system in which the first, second, and third lines 11, 12, and 13 are wrapped with NTC thermistors 14, respectively. In some cases, it is also possible to coat either the second wire 12 or the third wire 13 with an enamel or a synthetic resin insulator.

(d) is a method in which the first, second and third wires 11, 12 and 13 are embedded in one NTC thermistor 14 structure.

In the above various embodiments, the first line 11 for temperature sensing and the second line 12 and the third line 13 through which the current is turned u turn are provided, and the NTC thermistor 14 is disposed therebetween. It is characterized by. The second wire 12 and the third wire 13 should not be in contact with each other at an intermediate portion, and any one of the second wire 12 and the third wire 13 may be covered with an insulator.

(e) the first wire 11 is wound on the outside of the ventricle 11a, only the second wire 12 is wound on the outside of the NTC thermistor 14, and the second coating 12a is wound on the outside thereof, The third line 13 is wrapped with the metal conductive material in the form of a thin film. This may be used in the configuration as shown in FIG. 1, and the second coating 12a may use an NTC thermistor or an insulating material.

In the configuration as shown in (e), (f) changes the positions of the first line 11 and the third line 13 and is used in the configuration as shown in FIG.

5 is a view for explaining the operation between the three lines. Referring to FIG. 5, the first line 11, the second line 12, and the third line 13 form a triangular composition with each other, and the first line 11 for temperature sensing has a second line 12, respectively. ), The NTC thermistor 14 is provided between the third line 13, and as shown in the figure, the change in the temperature signal value due to the impedance change in the relationship between NTC1 and NTC2 is shown. The temperature signal value is calculated and detected as a parallel value by the temperature detector 300. If the third line 13 is wrapped with an insulating coating, only the impedance change value for NTC1 between the first line 11 and the second line 12 is detected. Since the internal electrical resistance value of each wire is much lower than the NTC impedance value, it is regarded as almost zero, and is treated in parallel while the ends of the second wire 12 and the third wire 13 are connected.

The temperature detection unit 300 compares the detection signal voltage by the temperature detection current on the first line 11 with the reference voltage. Due to the characteristics of the NTC thermistor 14, the higher the temperature, the lower the impedance. The voltage will be lower than the reference voltage. When the temperature voltage is lower than the reference voltage, the trigger signal is not output, and thus the control rectifier 30 does not operate and the heating is stopped. Therefore, the heating operation continues only when the temperature is low.

Meanwhile, as shown in (c), the first line 11 may be a shield line to surround the second line 12 and the third line 13, and as shown in (d), the third line 13 The shield wire may be used to surround the first wire 11 and the second wire 12.

6 is a diagram for explaining a circuit when a temperature detection current flows. Referring to FIG. 6, there is shown a flow of temperature detection and trigger generation currents input during a (+) half cycle of power, and the temperature detection current is the resistance 110 of the temperature signal voltage supply control unit 100 in the direction of the arrow. And it is input to the front end of the first line 11 through the variable resistor 120. The trigger generation current passes through the trigger coupling, the charge amount control resistor 230 and the condenser 220 of the generation unit 200, at this time, the capacitor 220 is charged. The matching resistor 310 is used as mutual impedance matching (scale span matching) between the temperature detector 300 and used to express the detection load load.

During the (+) half period for the temperature detection according to the reference voltage set by the temperature signal voltage supply control unit 100, the temperature signal voltage detected in the first line 11 is compared with the reference voltage and, if suitable for the reference voltage, The detector 300 turns on the control rectifier 30. When the control rectifier 30 (SCR) is turned on, a current charges the capacitor 220.

Thus, when the temperature detection operation is completed during the positive half cycle of the power supply, the heating operation is performed during the next half cycle. In the heating operation, when the charge charged in the condenser 220 is turned on by triggering the gate of the control rectifier 30, the current flows into the second line or the third line and is turned off to another line, so that the heating wire 10 It will be heated to a magnetic field, which will be described in detail with reference to FIG.

7 is a view showing another embodiment of the configuration of FIG. 6. 8 to 10 illustrate various embodiments of the FIG. 6 configuration. Referring to FIG. 7, a constant voltage diode 320 is further provided at a rear end of the first line 11. The constant voltage diode 320 outputs the change of the entire NTC value, but when the constant voltage diode 320 is further provided, the NTC value below the constant voltage value becomes 0, and only the change value of the constant voltage value is displayed. In this circuit, after comparing with the constant voltage, the higher value is read as HIGH and the lower value is read as LOW. This may be replaced with a one-way rectifying diode 340 as shown in FIG.

Referring to FIG. 8, a rectifying diode 330 is further provided between the end of the first line 11 and the constant voltage diode 320 to output a temperature signal in one direction. This serves to protect the circuit at the next stage due to the occurrence of reverse voltage.

Referring to FIG. 10, a photocoupler 350 may be provided to allow electrical insulation. The current from the temperature signal voltage supply control unit 100 is divided into the NTC thermistor 14 and the photocoupler 350, and current flows. At this time, when the NTC thermistor 14 is heated to a high temperature, the impedance value decreases, As the current to flow to the coupler 350 flows to the NTC thermistor 14, the illuminance value of the photocoupler 350 changes. As the illumination value changes, the current value of the phototransistor changes in proportion, thereby controlling the flow of the heating current.

11 to 15 are diagrams illustrating still another exemplary embodiment corresponding to the configuration of FIGS. 6 to 10. The configurations and operations of FIGS. 11 to 15 correspond to the configurations and operations of FIGS. 6 to 10, and the operations are the same except that the first wire 11 is used as the shield line. Since the first line 11 serves as a shield and becomes a ground G at the power supply side, the first line 11 serves to ground and dissipate the electric charge and the formed electric field leaking outward.

16 and 17 are diagrams for explaining a circuit when a heating current flows, FIG. 18 is a diagram showing the configuration diagram of FIG. 1 in detail, and FIG. 19 shows another embodiment corresponding to the configuration of FIG. 18. Drawing. FIG. 20 is a diagram illustrating another example corresponding to the configuration of FIG. 19.

16, 17, 18, and 20, when the temperature detection operation is completed during the (+) half cycle of the power supply, the heating operation is performed during the next (-) half cycle, the trigger coupling, the condenser 220 of the generation unit 200 Heating begins when the charge charged in the battery is discharged. When the charge charged in the capacitor 220 is turned on by triggering the gate of the control rectifier 30, the current is drawn to the third line (13). Then, the U-turn through the end and the current returned to the second line 12 returns to the power source, thereby heating the heating wire 10 magnetically.

Trigger combination of this function, the generation unit 200 is connected to the conventional rectifier diode in parallel with the capacitor, in the present invention, without using the rectifier diode, the discharge trigger resistor 210 and the charge control resistor 230 and between Charge and discharge of the condenser 220 connected to the simple structure to assume the same function. This reduces the number of parts and serves to reduce the heat generation point.

The trigger coupling and generation unit 200 is connected to the gate of the control rectifier 30 while the charge control resistor 230 is connected to the power supply, the cathode of the control rectifier 30 is also connected to the power supply side at the same time. The anode of the control rectifier 30 is connected to the end of the second line 2, the capacitor 220 is connected to the gate side and also connected to the discharge trigger resistor (210). The trigger coupling and generation unit 200 includes a charge current limiting resistor 410 and an SCR 420 connected in series with the discharge triggering resistor 210.

The control rectifier 30 has a cathode connected to a power supply alternating current terminal, an anode connected to a temperature signal input side reference point of the temperature detector, and the reference point is connected in series with a second line and a third line for heating the heating element. Preferably, the anode is connected to the power supply alternating terminal and the cathode is connected to the second line or the third line side.

The flow of the heating current and the trigger discharge current input during the negative half-cycle of the power supply is the same as the direction of the arrow. As the capacitor 220 of the trigger coupling and generation unit 200 is discharged, the discharge trigger resistor 210 and the charge control resistor The trigger discharge current flowing through 230 flows. When the charge charged in the condenser 220 is turned on by triggering the gate of the control rectifier 30, the heating current is drawn into the third line 13, and the current is turned U turn back to the second line 12 Since the return to the power source to heat the heating wire (10).

That is, in the heating operation, when the control rectifier 30 is turned on by the trigger coupling and the trigger signal output of the generator 200, the heating current is applied to the third line 13 and the second line 12 connected in series with the power supply. The heating wire is heated.

When the heating wire 10 is heated, the impedance of the NTC thermistor 14 is lowered, so that the temperature detection voltage is lowered during the next half cycle in which the AC power source has a positive phase. Therefore, when the temperature detection voltage is lower than the reference voltage, the trigger signal is not output, and thus, the control rectifier 30 does not operate and the heating is stopped.

By the trigger coupling and the charging and discharging operation of the generator 200, it is possible to flow the temperature detection current and the heating current in the opposite direction for each half wave, the trigger coupling, generator 200 is a condenser (without a rectifier) 20) and the discharge trigger resistor 210 and the charge control resistor 230 can achieve the function.

Although depicted as including the matching resistor 310 in the temperature detection unit 300, it includes all the parts that can detect the NTC thermistor (14).

The rectifier 20 may be connected between the other end side of the second line 12 and the third line 13. This rectifier acts as a reverse voltage protection device, easily detects it and breaks the power supply fuse.

On the other hand, the same method can be used for a non-magnetic heating wire, that is, a heating wire that is configured to double the inner and outer sides and flows u-turn. In this case, the heating wire includes only one line, and includes only one first wire for one sensor and only one second and third wire for heating, which are connected side by side without being turned off. In this case as well, according to the same principle, temperature detection and heating can be performed for each half wave by the trigger coupling and the charging and discharging operations of the generator 200.

This circuit is to control the temperature by turning on and off the heating power by the zero-cross switching method using the temperature signal voltage described with reference to FIG. When the variable resistor of 120 is set to the low temperature side and the temperature signal voltage value is lowered, the input voltage value of the control rectifier element SCR 420 is lowered, so that it cannot be turned on and the capacitor 220 is not charged, so that the control rectifier 30 cannot be conducted. As a result, the heating current supply is cut off.

When the variable resistor 120 is converted to the high temperature side to increase the temperature signal voltage value, the SCR 420 input voltage value is increased to be turned on, and the control rectifier 30 is conducted while the capacitor 220 is charged, thereby supplying a heating current.

When the heating wire 10 is heated to increase the temperature, and the temperature signal voltage of the NTC thermistor 14 is lower than the set value of the variable resistor 120, the conduction of the SCR 420 is turned off and the supply of the heating current is cut off. As this operation is repeated, the temperature of the heating wire 10 is automatically kept constant.

In this operation, as the capacitor 220 is charged (temperature detection cycle) and discharged (heating cycle) every half cycle of power exchange, the power control of the control rectifier 30 is zero-zeroed to block switching electric noise.

19 and 21 are diagrams showing another example of the configuration as shown in FIGS. 18 and 20, respectively. 19 and 21, a constant voltage zener diode 320 is further provided at a rear end of the first line 11 or the second line 12, and the rectifier diode 330 is further connected to the first line 11 or the second line 12. It is provided between the end of the second line 12 and the constant voltage diode 320 to output a temperature signal in one direction. This serves to protect the circuit at the next stage due to the occurrence of reverse voltage. The constant voltage diode 320 outputs the change of the entire NTC value, but when the constant voltage diode 320 is further provided, the NTC value below the constant voltage value becomes 0, and only the change value of the constant voltage value is displayed. In this circuit, after comparing with the constant voltage, the higher value is read as HIGH and the lower value is read as LOW.

22 is a diagram illustrating an embodiment in which the first line is connected in only one direction. Referring to FIG. 22, as shown in claim 8, only one end of the shield first wire 11 is connected to the power supply side or the second wire 11 side, and the other part may be configured such that there is no connection at all. In this case, since the number of terminals 17 connected between the heating wire and the temperature controller can be reduced to at least three, the connection part is reduced, so that the production assembly is easy, and the use of the wire can be reduced, thereby reducing the cost.

FIG. 23 is a view showing operating waveforms in the circuit of FIG. 18. FIG. Referring to FIG. 23, when an input AC current such as a is applied to a power source, the SCR 420 gate input temperature signal voltage of the trigger coupling and generation unit 200 shows a waveform such as b. If this value is higher than the set value (horizontal dotted line), the conduction current is output from the anode side, and if it is low, it is not output (see c). According to the output of the SCR 420, the potential of the condenser 220 changes as in d, and a heating current is applied as in ON during the next half cycle, or a heating current is blocked as in OFF, depending on the charging.

FIG. 24 is a diagram illustrating an example in which the circuit of FIG. 18 is configured in a reverse phase, and FIG. 25 is a diagram illustrating another example of the configuration of FIG. 24. 24 and 25, the circuits of FIGS. 18 and 19 are slightly modified, respectively. This corresponds to claims 2 and 4. The trigger coupling and generation unit 200 includes a discharge trigger resistor 210, a charge control resistor 230, a capacitor 220, a transistor 240, a charge / discharge capacitor 260, and an overcurrent limit resistor 250.

In this configuration, the temperature signal voltage flows at the (+) operating phase angle, flows at the (-) operating phase angle, and in order to adjust the temperature to the (-) signal voltage, the transistor 240 and the overcurrent limit Resistor 250 is provided. The heating voltage is also operated in the opposite phase with (+). These circuits only reverse the phase value, and the temperature control method is the same as the circuit described above.

The pnp transistor is used to detect the temperature signal as a negative signal voltage. SCR input should not be used because only the (+) signal should be input but the (-) signal is applied, which causes the problem of switching the phase from (-) to (+) again.

The overcurrent limit resistor 250 is intended to control the discharge time of the charge / discharge capacitor 260, and serves to make the hatched portion in b to be described later with reference to FIG. This is used for impedance matching and overcurrent limiting as with the resistor 310 described above. It is also used for protection when high voltage occurs due to static electricity generated from heating wires. The transistor 240 is used to determine whether the capacitor 220 is discharged according to the temperature signal.

That is, during charging, the charge control resistor 230, the capacitor 220, the charge current limiting resistor 410, and the SCR 420 in the order of discharge, and the capacitor 220, the discharge trigger resistor 210, and the transistor during discharge. 240, the charge control resistor 230 operates in order.

FIG. 26 is a diagram illustrating operating waveforms in the circuit of FIG. 24. FIG. Referring to FIG. 26, when an input AC current such as a is applied to the power source, the trigger coupling, the magnitude of the temperature signal voltage at the input side of the transistor 240 of the generator 200, and the charge and discharge voltage of the charge / discharge capacitor 260 are performed. Appears as b. If this value is higher than the set value (horizontal dashed line), the conduction current is output. At this time, the charging and discharging potential of the condenser 220 is equal to d, and according to the output of the SCR 420, heating current is applied as ON for the next half cycle depending on charging as d, or the heating current is blocked as OFF. do.

FIG. 27 is a diagram illustrating the configuration of FIG. 1 in detail according to another embodiment, and FIGS. 28 to 30 illustrate other embodiments of the configuration of FIG. 27. 27 to 30, all of the circuits described above are the same, but there is a difference in the heating line 10.

In the heating wire 10, as the third wire 13 is covered with the insulating layer 15, only the second wire 12 is in contact with the first wire 11 and the NTC thermistor 14, and the third wire ( 13) is not in contact. In this case, instead of calculating the NTC1 value and the NTC2 value in parallel, the NTC1 value is calculated.

31 and 32 illustrate another embodiment of the present invention. 31 and 32, in addition to the control circuit, a pulse generation timer IC for controlling power by time division is provided. Heating temperature of the heating wire (10) of the preceding circuit to control the temperature only by the average temperature signal value, when viewed from the heating wire (10) as a whole, when the thermal insulation relationship is used unevenly, the surface temperature of the heating wire (10) is also inequality in the low temperature use side In order to compensate for this, the low temperature side is to compensate by heating with a fixed power ratio. That is, the high temperature negative temperature control of the heating wire 100 is fixed to the existing temperature signal voltage to control overheating and temperature rise, and the low temperature negative temperature control is to fix and control the power by time division.

Here, the time division method is achieved by using a pulse width oscillator circuit, and the oscillation frequency is fixed but controlled by adjusting the duty ratio of the pulse width, which can be easily configured using a microcomputer chip or a timer IC.

The pulse width control generation circuit unit 600 is applied to a power supply unit consisting of a resistor 621, a rectifying diode 622, a DC smoothing capacitor 624, and a zener diode 623 to generate a circuit power supply. The microcomputer control unit IC-lm555 ( 620, capacitors 630, 631, resistors 625, 627, 629, and volume 610 to provide power to the trigger coupling and generation unit 200.

The pulse width control generation circuit unit 600 uses a well-known timer IC-lm555 oscillation circuit, and the pulse width control method of the IC-lm555 oscillation circuit is based on a well-known sales product, and thus description of the separate operation will be omitted.

The oscillation period is determined by the capacitor 631, the resistors 625, 627, 629, and the volume 610, and the pulse width control is performed through the volume 610 or the charge and discharge of the diodes 626 and 628. It is determined by adjusting the direction and time. When the pulse width is adjusted by the volume 610, the duty ratio of the pulse width can be changed in the range of 10% or less to 90% or more. According to the adjustment of the volume 610, the pulse width signal is synchronized with the half-wave heating current, so that the second line 12 and the third line 13 are heated.

The pulse width control generation circuit unit 600 is connected to the on-off switching unit 500, and removes the variable resistor 120 of the temperature signal voltage supply control unit 100 to be fixed to the high temperature side, the temperature to the fixed resistance 110 After outputting the signal value, when the pulse width control generation circuit unit 600 is combined with the switching unit 500 to time-divisionally switch the temperature signal output value to HIGH-LOW, the SCR 420 turns on and off according to the synchronization. 10) is heated.

The pulse width control generation circuit unit 600 is connected and coupled by the temperature detector 300 and the coupling diode 510. The anode of the coupling diode 510 is connected to the bias resistor 310 side of the gate of the control rectifier 420, and the cathode is connected to the output of the pulse width adjustment generation circuit 600 so that the time division pulse output signal voltage is low. When the control signal voltage across the bias resistor 310 is at a low level through the coupling diode 510 to control the energization of the control rectifier 420.

When the time division pulse output signal voltage becomes high, since the control signal voltage across the bias resistor 310 becomes the reverse voltage to the coupling diode 510, the control rectification element 420 is energized without being affected by the coupling diode 510. Decide

FIG. 33 is a diagram showing actual operating waveforms of the thermostat of the present invention, in particular the high temperature side operating waveforms in the FIG. Referring to FIG. 33, when an AC power source is input (a), the initial half wave generates a voltage loss or the like according to a change in the impedance value between the first line 11 and the second line 12 or the third line 13. If the magnitude of the gate input temperature signal voltage of the SCR 420 is greater than or equal to a predetermined value, the anode current of the SCR 420 is generated as c.

When the control rectifier 420 is turned on, the half-wave current charges the capacitor 220 (d). When the detection operation is completed during the positive half cycle of the power supply, the heating operation is performed during the next half cycle. Heating is started while the charge charged in 220 is discharged (e).

When the charge charged in the capacitor 220 triggers the gate of the control rectifier 30, the heating current is drawn into either the second line 12 or the third line 13. The current drawn into one of the wires is U-turned at the end and comes back to the other, so that the heating wire is heated magnetically. In this way, the magnetic field is heated by checking for abnormality of the heating wire, local heating, and overheating.

34 is a view showing the low temperature side waveforms in the circuit of FIG. Referring to FIG. 24, (a) represents an input of an AC power source, (b) represents a duty ratio of heating current per repetition cycle of 10%, (d) represents a 50% ratio, and (f) represents 100%. In this case, the time-division pulse oscillation waveform is shown, and (c) (e) (g) indicates a heating current application state at each duty ratio.

Depending on the duty ratio, the heating time becomes longer or shorter, and thus the heating intensity can be adjusted. The adjustment of the duty ratio can be selected by the volume, or by using the charge and discharge time of the resistor and the capacitor, or the microcomputer. It also controls the pulse generation and pulse width.

When the duty ratio is selected as 10% as shown in (b), since the pulse width is limited in time division when the power is input, the heater heating power is applied only within the corresponding time range (c). When the duty ratio is 50%, the waveform shown when the duty ratio is 100% is also interpreted in the same manner.

In other words, the temperature density of the heating wire is controlled by supplying the current in a time-division state, and in particular, the heater surface temperature density value of the heating wire that directly heats the human body in bedding and the like is controlled to a maximum of 120 ° C or less in accordance with safety relations or standards. Since it is prescribed | regulated as an average of 100 degrees C or less, for this reason, surface temperature of a heating wire is predetermined by the heater resistance surface power of 120 degrees C or less. The surface temperature density of the heating wire has the same proportional relationship with the power consumption power density of the heating wire, so it is not necessary to control the heater surface temperature by supplying heating power while measuring with a separate temperature sensor. You can control it.

35 is a view showing an embodiment of another method using a photocoupler. Referring to FIG. 35, when the pulse width signal voltage of the pulse width control generation circuit unit 600 operates the photocoupler 640 to energize the control rectifier 30, the second line 12 and the third line 13 are connected to each other. Half-wave heating current flows and is heated. That is, when the temperature signal voltage output is electrically isolated using photocouplers and sent to a temperature control circuit configured using a microcomputer chip, the temperature signal is analyzed and output through the gate of the control rectifier 30 to transmit the heating wire 10. By automatically adjusting the temperature of, the application of the temperature signal voltage isolated by the photocoupler can be seen that the application of the infinite circuit widens.

Here, the photocoupler 640 is connected to the light emitting diode 350 of the input side, and the photocouple light emitting diode 360 is turned on as the pulse width of the output of the pulse width control generation circuit 600 is applied to the gate of the control rectifier 30. Triggered and energized The photocoupler 610 may use a MOC3061 or the like that triggers zero voltage crossing, or may use a phase control photocoupler such as the MOC3021.

On the other hand, by separately providing a surface electric field blocking unit (not shown) on the heating wire, and set the grounding light indicator and the grounding light indicator (not shown) connected to one end of any one of the heating wire 10 is grounded to the off position An inspection test terminal (not shown) may be provided to block the surface electric field of the heating wire. The grounding light indicator is composed of a resistor (not shown) and a neon tube (not shown) connected in series.

It is also possible to add an overcurrent safety device to such a circuit. The operation of the overcurrent safety device is as follows. The overcurrent safety device is to short-circuit the control rectifier 30 to detect the reverse overcurrent flowing in the heating wire 10 and to disconnect the reverse current. The overcurrent safety device includes a rectifier 20 for reverse detection to detect such overcurrent.

The rectifier 20 is connected in parallel in the reverse direction of the heating current of the second line 12 and the third line 13. When the control rectifier 30 is shorted, reverse overcurrent flows through the rectifier 20. At the time of such an overcurrent energization, overcurrent cuts a fuse, and can protect a circuit from overheating.

The claims of the present patent as described above include a structure in which three lines are coated and connected to each other by NTC thermistor resin, and arbitrarily select one of the three lines to use as a temperature signal detection line.

The claim of the present patent claims that the impedance of the NTC thermistor between the first and second wires or between the first and third wires decreases when a portion of any of the heating of the second and third wires is locally overheated. And a method for outputting a temperature signal voltage for a thermal cut-off device for controlling the heating current of the second and third lines by using a reduced temperature signal voltage.

1 is a view showing a configuration according to an embodiment of the present invention.

2 is a view showing a configuration according to another embodiment of the present invention.

3 is a view showing various embodiments of the three-wire heating wire used in the present invention.

4 is a diagram illustrating each cross section of the heating wire of FIG. 3.

5 is a view for explaining the operation between the three lines.

6 is a diagram for explaining a circuit when a temperature detection current flows.

FIG. 7 is a diagram illustrating another embodiment corresponding to the configuration of FIG. 6.

FIG. 8 is a diagram illustrating still another embodiment corresponding to the configuration of FIG. 6.

FIG. 9 is a diagram illustrating still another embodiment corresponding to the configuration of FIG. 6.

FIG. 10 is a diagram illustrating still another embodiment corresponding to the configuration of FIG. 6.

11 to 15 are diagrams illustrating still another exemplary embodiment corresponding to the configuration of FIGS. 6 to 10.

16 is a diagram for explaining a circuit when a heating current flows.

17 is a diagram for explaining another circuit when a heating current flows.

18 is a view showing in detail the configuration diagram of FIG. 1.

19 is a view showing another embodiment corresponding to the configuration of FIG. 18.

20 to 21 are diagrams illustrating still another exemplary embodiment corresponding to the configuration of FIGS. 18 to 19.

22 is a diagram illustrating an embodiment in which the first line is connected in only one direction.

FIG. 23 is a view showing operating waveforms in the circuit of FIG. 18. FIG.

24 is a diagram illustrating an example in which the circuit of FIG. 18 is configured in an antiphase.

FIG. 25 is a diagram illustrating another embodiment corresponding to the configuration of FIG. 24.

FIG. 26 is a diagram illustrating operating waveforms in the circuit of FIG. 24. FIG.

FIG. 27 is a diagram illustrating in detail another embodiment corresponding to the configuration of FIG. 1. FIG.

FIG. 28 is a diagram illustrating another embodiment corresponding to the configuration of FIG. 27.

FIG. 29 is a diagram illustrating an embodiment in which the circuit of FIG. 27 is configured in an antiphase.

30 is a view showing another embodiment corresponding to the configuration of FIG. 28.

31 is a diagram showing another embodiment of the present invention.

32 is a diagram showing the configuration diagram of FIG. 31 in detail.

33 is a diagram illustrating a high temperature side operation waveform in the circuit of FIG. 32.

34 is a view showing the low temperature side waveforms in the circuit of FIG.

35 is a view showing an embodiment of another method using a photocoupler.

Claims (27)

A temperature detection and temperature control circuit in which three wires are connected to a heating wire arranged with an NTC thermistor interposed therein, wherein the three wires of the heating wire are the first wire and the second wire and the third wire. The wires interconnect the ends so that a heating current is U-turned to the third wire upon input to the second wire, A temperature signal voltage supply control unit controlling a supply of the temperature signal voltage; A temperature detector for outputting a temperature control signal by comparing a temperature signal voltage output between the first line and the second line and / or between the first line and the third line with a reference voltage; A trigger combination and generator for generating a trigger signal and controlling this operation; And And a control rectifier connected to the trigger coupling and generation unit. The cathode of the control rectifier is connected to a power source, One end of either the second or third line is connected to a power source, the other end is connected to an anode of the control rectifier, Electromagnetic cutoff for detecting an electrical temperature signal proportional to a heating temperature by detecting at least one of an impedance value between the first line and the second line or a change in impedance value between the first line and the third line in the temperature detector. 3-wire temperature detection and control circuit. A temperature detection and temperature control circuit in which three wires are connected to a heating wire arranged with an NTC thermistor interposed therein, wherein the three wires of the heating wire are the first wire and the second wire and the third wire. The wires interconnect the ends so that a heating current is U-turned to the third wire upon input to the second wire, A temperature signal voltage supply control unit controlling a supply of the temperature signal voltage; A temperature detector for outputting a temperature control signal by comparing a temperature signal voltage output between the first line and the second line and / or between the first line and the third line with a reference voltage; A trigger combination and generator for generating a trigger signal and controlling this operation; And And a control rectifier connected to the trigger coupling and generation unit. An anode of the control rectifier is connected to a power source, One end of either the second line or the third line is connected to the power source, the other end is connected to the cathode of the control rectifier, Electromagnetic cutoff for detecting an electrical temperature signal proportional to a heating temperature by detecting at least one of an impedance value between the first line and the second line or a change in impedance value between the first line and the third line in the temperature detector. 3-wire temperature detection and control circuit. A temperature detection and temperature control circuit in which three wires are connected to a heating wire arranged with an NTC thermistor interposed therein, wherein the three wires of the heating wire are the first wire and the second wire and the third wire. The wires are interconnected at their ends so that a heating current is turned to a third wire upon input to the second wire, the third wire being insulated from the second wire, A temperature signal voltage supply control unit controlling a supply of the temperature signal voltage; A temperature detector for outputting a temperature control signal by comparing the temperature signal voltage output between the first line and the second line with a reference voltage; A trigger combination and generator for generating a trigger signal and controlling this operation; And And a control rectifier connected to the trigger coupling and generation unit. The cathode of the control rectifier is connected to a power source, One end of either the second or third line is connected to a power source, the other end is connected to an anode of the control rectifier, And a 3-wire temperature detection and control circuit for detecting electromagnetic waves in proportion to a heating temperature by detecting a change in an impedance value between the first line and the second line in the temperature detector. In a temperature detection and temperature control circuit in which three wires are connected to a heating wire arranged with an NTC thermistor interposed therein, the three wires of the heating wire are the first wire and the second wire and the third wire. The wires are interconnected at their ends so that a heating current is turned to a third wire upon input to the second wire, the third wire being insulated from the second wire, A temperature signal voltage supply control unit controlling a supply of the temperature signal voltage; A temperature detector for outputting a temperature control signal by comparing the temperature signal voltage output between the first line and the second line with a reference voltage; A trigger combination and generator for generating a trigger signal and controlling this operation; And And a control rectifier connected to the trigger coupling and generation unit. An anode of the control rectifier is connected to a power source, One end of either the second line or the third line is connected to the power source, the other end is connected to the cathode of the control rectifier, And a 3-wire temperature detection and control circuit for detecting electromagnetic waves in proportion to a heating temperature by detecting a change in an impedance value between the first line and the second line in the temperature detector. The method according to any one of claims 1 to 4, In the second line and the third line, One end of any one of the second line and the third line is connected to the unidirectional rectifier, And a heating current is input to the second line through the one-way rectifier to make a U-turn to the third line. The method according to any one of claims 1 to 4, The electromagnetic wave shielding three-wire temperature detection and control circuit, characterized in that any one of the first line or the third line is used for the shield. The method of claim 6, The wire used for the shield is: Electromagnetic shielding three-wire temperature detection and control circuit is characterized in that the thin film is located outside the other two lines. The method according to claim 1, wherein The first wire is used for the shield, The first line used for the shield is electromagnetic shielding three-wire temperature detection and control circuit, characterized in that only one end is connected to the power supply side. The method according to any one of claims 1 to 4, wherein the trigger coupling, generating unit: Including discharge trigger resistor, charge control resistor and capacitor, The discharge trigger resistance is for turning on the control rectifier while the capacitor is discharged, The charge control resistor is for controlling the amount of charge of the capacitor electromagnetic shielding three-wire temperature detection and control circuit. The method according to any one of claims 1 to 4, wherein the trigger coupling, generating unit: Including discharge trigger resistor, charge control resistor, capacitor, transistor and charge / discharge capacitor, The charge and discharge capacitor is connected between the first line and the second line, The transistor is connected between the charge and discharge capacitor and the discharge trigger resistor, The discharge trigger resistance is for turning on the control rectifier while the capacitor is discharged, The charge control resistor is for controlling the amount of charge of the capacitor electromagnetic shielding three-wire temperature detection and control circuit. The method of claim 1 or 2, wherein the temperature detection unit: Connecting between the first line and the second line, And a matching resistor for connecting between the first line and the third line. The method of claim 3 or 4, wherein the temperature detection unit: And a matching resistor connecting the first line and the second line to each other. The method according to any one of claims 1 to 4, wherein the temperature detection unit: Electromagnetic shielding 3-wire temperature detection and control circuit further comprises a constant voltage diode connected to the first line. The method of claim 13, wherein the temperature detection unit: And a rectifying diode between the first line and the constant voltage diode. The method according to any one of claims 1 to 4, wherein the temperature detection unit: Electromagnetic shielding 3-wire temperature detection and control circuit further comprising a rectifying diode connected to the first line. The method of claim 1 or 2, wherein the temperature detection unit: Connecting between the first line and the second line, And a photocoupler for connecting between the first line and the third line. The method of claim 3 or 4, wherein the temperature detection unit: And a photocoupler for connecting between the first line and the second line. The method according to any one of claims 1 to 4, And a pulse width adjustment generating circuit unit controlling and controlling a pulse width by a time division set when a signal voltage is applied to the temperature detection unit. And the trigger coupling and generation unit receives a signal from the pulse width control generation circuit unit and energizes a heating current. 3. The method according to any one of claims 1 to 4, A pulse width adjustment generating circuit unit controlling and controlling a pulse width by a time division set when a signal voltage is applied to the temperature detection unit; And And a switching unit configured to receive a signal from the pulse width control generation circuit unit and energize a heating current. 3. The temperature signal voltage supply control unit according to any one of claims 1 to 4, wherein: With variable resistance and fixed resistance, And said variable resistor and said fixed resistor are connected in series. The method of claim 10, wherein the trigger coupling, generating unit: And an overcurrent limit resistor coupled to the transistor, The over-current limit resistance is electromagnetic shielding 3-wire temperature detection and control circuit for the purpose of controlling the discharge time of the charge and discharge capacitor. The method of claim 9, wherein the trigger coupling, the generation unit: Charge limit resistance; And Including a control rectifier, And the charge limit resistor is connected between the discharge trigger resistor and the capacitor side and the anode of the control rectifier element. The method of claim 11, wherein the trigger coupling, generating unit: Charge limit resistance; And Including a control rectifier, The transistor is: Connect the base and emitter to the temperature detector side, And the charge limit resistor is connected between the discharge trigger resistor and the capacitor side and the anode of the control rectifier element. The method according to any one of claims 1 to 4, When the signal voltage is applied to the temperature detection unit, further comprising a pulse width control generation circuit for controlling by controlling the pulse width by the set time division, The pulse width control generation circuit portion: And a pulse width is controlled through a volume to control heating power by adjusting the volume. 3. The method according to any one of claims 1 to 4, When the signal voltage is applied to the temperature detection unit, further comprising a pulse width control generation circuit for controlling by controlling the pulse width by the set time division, The pulse width control generation circuit unit includes a microcomputer control unit for dividing and controlling the power synchronization frequency according to the set counter division conditions, The microcomputer control unit: Divide the power synchronous frequency to adjust the pulse generation and pulse width, The high temperature side temperature control is fixed, and the low temperature side temperature detection and control circuit for electromagnetic wave blocking, characterized in that the automatic adjustment according to the pulse width control through the pulse width control oscillation circuit. 26. The circuit of claim 25, wherein the pulse width regulation generating circuit portion is: Includes a photocoupler for insulation, Electromagnetic shielding 3-wire temperature detection and control circuit for reading a temperature signal voltage through the photocoupler, or triggers the gate of the control rectifier. 27. The device of claim 26, wherein the photocoupler is: Electromagnetic cut-off three-wire temperature detection and control circuit, characterized in that it is operated by zero voltage crossing.

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