KR200219611Y1 - Temperature control device of heating element - Google Patents

Abstract

The present invention relates to a temperature control device for a heating element, and more particularly, a function of the heating element having a heating wire such as an electric wire and an electric field plate, as well as a function of inducing electromagnetic waves to a shield and grounding the electromagnetic wave. It is to be able to indicate the situation that is being used in the summer do not use a heating element relates to a temperature control device of the heating element made to enable the use of four seasons by generating ultra-long waves by the magnetic field action.

The present invention solves the problems of the electromagnetic wave generated by the conventional electric yoke, electric field plate, and configures the circuit around the comparator to provide a temperature control device of a heating element that is very stable, simple in configuration, and resistant to ambient noise. Display the shielded state on the temperature control device to easily identify the connection state of the power line capable of shielding electromagnetic waves, and control the generation of ultra-high wave that is beneficial to the human body even in the winter season using the heating wire and the summer when the use of the heating wire is unnecessary. In addition, it has an object of providing a temperature control device of the heating element of the electric yaw, electric field plate that can be used for four seasons.

In order to achieve the above object, the present invention provides a constant voltage power supply unit formed by full-wave rectification of a power supply voltage to a circuit power supply, and a first comparator and a first comparator outputting a square wave in synchronization with an AC cycle from the constant voltage power supply. And a second comparator for driving the heating line at a set temperature in synchronism with the alternating cycle, and a third comparator for detecting abnormally overheating of the heating temperature and limiting the output of the second comparator.

In addition, a shielding circuit may be added to identify a state of grounding the electromagnetic wave generated from the heating wire, and a fourth comparator may be detected and displayed by the LED by detecting the ground operation through the shielding circuit.

Description

Temperature control device of heating element

The present invention relates to a temperature control device for a heating element, and more particularly, a function of the heating element having a heating wire such as an electric wire and an electric field plate, as well as a function of inducing electromagnetic waves to a shield and grounding the electromagnetic wave. It is to be able to indicate the situation that is being used in the summer do not use a heating element relates to a temperature control device of the heating element made to enable the use of four seasons by generating ultra-long waves by the magnetic field action.

In general, a thermostat for controlling the power supplied to the heating wire in order to control the temperature of the heating wire in an electric mat or electric plate made of a heating wire is used.

Looking at the prior art having such a function is known the following techniques.

In order to make it possible to use it as a free voltage method without specially stepping down or stepping up the power supply voltage at the commercial AC 110V / 220V, the timing of switching the power supplied to the heating wire is supplied when 220V is supplied. It is known that various methods are made so that the average power supplied to the heating wire as the load is 1/4 to 1/5 so as to be used regardless of the input voltage by maintaining the same power when supplying 110V.

Korean Utility Model Publication Nos. 87-2925, 88-772, 90-6658, 91-4584, 91-6844 and Applicant's Utility Publication 95-3693 by the above-mentioned conventional techniques. have.

However, according to all the above-mentioned prior arts, considerable electromagnetic waves are leaked by the inductive load of the heating wire, and these electromagnetic waves may have a considerable hazard in consideration of the fact that they are used in the direct contact with the user. And there is no alternative to these electromagnetic waves at all.

Of course, in order to block the electromagnetic waves generated from the heating wires as described above, as required by the Utility Model Publication Nos. 94-21504 and 94-23771, an electric need to shield the electromagnetic waves by covering the electromagnetic wave absorbing member or the conductive conductor film above and below the heating wire. There was also a composition.

However, the electromagnetic wave absorbing member is known to be a very expensive material, and even if the electromagnetic wave is shielded using these materials, there is a problem that the electromagnetic wave generated without proper grounding cannot be basically excluded.

In addition, when a separate ground is performed to ground the electromagnetic waves, it is preferable to ground the power supply line to the ground terminal so that there is no restriction on the movement of the place, but display means for identifying whether such grounding is normally performed. There is a restriction that can not be effectively grounded because it is not provided.

Therefore, the conventional electric yoke, electric blanket and the like having a shielding function needs to test whether the electromagnetic wave is generated by using a separate electromagnetic wave detection display device, so there is a disadvantage that it is necessary to separately purchase and use the electromagnetic wave detection display device. .

Of course, most thermostats do not have an electromagnetic shielding function for this reason.

The present invention has been devised to enable the use of the four seasons to solve the problems of the electromagnetic wave generated by the conventional electric yaw, electric field plate as described above has the following object.

The present invention is to provide a temperature control device for a heating element that is very stable, concise and strong against ambient noise by constructing a circuit centered on a comparator that controls the power supply of the heating wire in synchronism with an AC waveform in order to control the temperature of the heating element. .

The present invention is to provide a temperature control device for a heating element having an electromagnetic shielding function to be able to ground the electromagnetic wave generated from the heating wire to the ground wire (negative wire) of the power supply line of the thermostat.

The present invention provides a temperature control device for a heating element that makes it easy to identify the connection state of a power line capable of shielding electromagnetic waves by displaying a state where electromagnetic waves are shielded on a temperature control device. It is.

The present invention is to provide a temperature control device for the heating element of the electric yoke, electric blanket that can be used for four seasons by adding a very long wave generation control function beneficial to the human body even in the winter season using the heating wire and the use of the heating wire.

In order to achieve the above object, the present invention provides a constant voltage power supply unit formed by full-wave rectification of a power supply voltage to a circuit power supply, and a first comparator and a first comparator outputting a square wave in synchronization with an AC cycle from the constant voltage power supply. And a second comparator for driving the heating line at a set temperature in synchronism with the alternating cycle, and a third comparator for detecting abnormally overheating of the heating temperature and limiting the output of the second comparator.

In addition, a shielding circuit may be added to identify a state of grounding the electromagnetic wave generated from the heating wire, and a fourth comparator may be detected and displayed by the LED by detecting the ground operation through the shielding circuit.

1 is a block diagram for explaining the present invention.

Figure 2 is a circuit diagram showing a temperature control device as an embodiment of the present invention.

3 is a circuit diagram showing a temperature control device according to another embodiment of the present invention.

4 is a circuit diagram showing a modified embodiment of the temperature setting unit of the present invention.

Explanation of symbols on the main parts of the drawings

10: constant voltage power supply unit 20: AC synchronous pulse generator

30, 30a: temperature setting unit 40: drive unit 50: heat generating control unit

60: overheat detection unit COM IC: comparator integrated circuit

COM1 to COM4: First to fourth comparators IC2: Decade counter

Technical configuration made to achieve the object of the present invention as described above will be described in detail with reference to the accompanying drawings.

Reference is made to the block diagram in which the technique of the present invention is shown in FIG. 1.

The present invention rectifies the commercial AC voltage to form a constant DC voltage, a constant voltage power supply unit 10, an AC synchronous pulse generator 20 for generating a pulse synchronous with the cycle of the commercial AC voltage and the waveform shaping the synchronous pulse A first comparator COM1, a temperature setting unit 30 that is variably set by an external input, a setting value of the temperature setting unit, and a triangle wave synchronized with the first comparator; Comparator (COM2) of the second, the driving unit 40 for switching the heating line to the output of the second comparator, and the heating line and the heating control unit (50) for switching the AC power applied to the heating line to detect the overheat of the heating line And an overheat detection unit 60 having a temperature sensor, a third comparator COM3 for discriminating the detected value, and a third comparator output to limit the second comparator output.

Detailed circuit configuration as an embodiment made by the present invention as described above will be described in detail.

As shown in FIG. 2, the present invention composes a constant voltage power supply unit 10 that drops a commercial AC power supply to form a constant voltage required for a circuit, and compares the output of the transistor Q1 that forms a synchronized waveform according to the AC cycle of the power supply unit. A reference input is connected to the first comparator of the integrated circuit COM IC, and a reference voltage level is formed between the voltage divider resistors R6 and R7 between the constant voltage power supply lines and a reference input to the comparator. The comparator outputs a square wave of the same period as a shaped waveform in accordance with the cycle of a commercial AC power supply.

On the other hand, the temperature setting unit 30 forms the divided voltages of the resistors R17 and R18 and the temperature setting variable resistor VR as the comparison voltage between the constant voltage power lines, and the resistors R14 and R15 and the capacitor C3. A triangular wave generated as a reference input and connected to a second comparator of the comparator integrated circuit (COM IC), respectively, and outputting the first comparator to a second comparator using reverse diodes D3 and D4. Connect to the reference input of. When the first comparator output occurs in synchronism with the alternating period of the first comparator, the second comparator receives a synchronizing pulse of a triangular waveform by the capacitor C3 and sets the temperature according to the variable resistor VR. It occurs by varying the output pulse width of the square wave according to the value.

In other words, when the temperature is set to a low temperature, the second comparator output pulse width is narrow. As the temperature is increased to a high temperature, the pulse width becomes wider. When the temperature is set to the highest temperature, the second comparator output pulse outputs a constant voltage close to the DC level to control the heating time. .

The output of the second comparator is connected to the driving unit 40 composed of the resistors R19 and R20 and the transistor Q3 to drive the comparator according to the output pulse of the comparator.

The heating line control unit 50 controlled by the driving unit connects the heating line H and the switching triacs TH1 and TH2 between AC power lines to connect the output of the driving unit to the triac TH1 with a trigger pulse. .

In order to prevent overheating of the heating wires, an overheating current is formed between the reference inputs having the resistors R8 and R9 between the constant voltage power lines and the divided input values of the resistors R10 to R12 and the temperature sensor S. A resistor R15 and a condenser which form a detection unit 60 and connect each input to a third comparator of the comparator integrated circuit COM IC, and form the triangular wave through an output transistor Q2 at an output terminal of the comparator. Connect the resistor (R16) to the connection point of (C3) and connect between ground terminals. When the third comparator output is present, the third comparator output is recognized as overheating and the second comparator input for driving the heating line is cut off so that the second comparator output is cut off.

As described above, all the control standards are made of a comparator output according to the voltage level, thereby enabling stable operation without being influenced by ambient noise, and separately forming a temperature sensor for detecting abnormal overheating of the heating wire to drive the heating wire. By limiting the output of the third comparator, damage from overheating can be prevented.

The present invention as described above, by adding a simple circuit to be described later in addition to the temperature control of the basic heating line, it is possible to configure the heating line temperature control device having a variety of functions.

3 is a circuit diagram as another embodiment of the present invention.

This circuit uses a ground circuit for inducing electromagnetic grounding to an electric wave or an electric field made of a conventional shield, a ground detection circuit for detecting the operation of the ground circuit, and a ground operation of the ground detection circuit as a fourth comparator (COM4). It is a display unit which shows that electromagnetic waves are shielded by LED.

It is connected to a conventional shield 77, and the ground portion 71 and the constant voltage power line of the coupling capacitor (C5, C6) and the discharge resistor (R32) for grounding electromagnetic waves to one ground line of the commercial AC input terminal of the thermostat The reference voltage is formed by the divided voltage values by the resistors R23 and R24, and the comparison voltages by the resistors R27 and R28 and the capacitor C4 are formed, respectively, to the fourth comparator of the comparator integrated circuit C0M IC. A ground detection circuit (73) consisting of transistors (Q4, Q5) turned on to drop the comparison voltage according to the ground drive of the ground part to the ground part (71) and connected to the fourth comparator output terminal. A resistor R23, a transistor Q6, and an electromagnetic wave blocking display LED (LED3) are connected to the display unit 75.

It is known to suppress the generation of electromagnetic waves by inducing electromagnetic waves generated when the electric yoke or electric sheet formed with such a shield for electromagnetic shielding is used in combination with the present temperature control device to flow to the ground.

At this time, if the electric wire or the electric blanket is plugged into the outlet so that the ground wire (AC minus line) on the AC power supply side is located at the shielding side, normal electromagnetic shielding can be achieved. Will not be achieved.

Therefore, according to the present invention, the position of the AC line is recognized by the user, and the electric wave shielding position is recognized so as to be connected to the outlet.

It induces electromagnetic waves generated when the AC ground line is connected to the shield side, and flows through the capacitors C5 and C6 to the AC ground line. In the process, the transistors Q5 and Q6 are turned on to compare the inputs of the fourth comparator. By dropping the potential to cut off the output of this comparator, the transistor Q6 of the display portion 75 is turned off, and the LED (LED3) is turned off to indicate that normal electromagnetic shielding is achieved.

If the normal electromagnetic wave shielding is not performed, the transistors Q4 and Q5 are turned off and the fourth comparator generates a high output so that the transistor Q6 is turned on so that the LED LED3 is turned on. The user acts as a warning to turn on the power line of the electric yoke or electric field by turning on the display.

On the other hand, the LED is to achieve a visual warning, it may be combined with a buzzer to enable an audio warning.

In addition, the present invention, in addition to the inherent function of controlling the heating wire to enable the use of the electric field or the electric field for four seasons, by installing the ultra-high frequency coil in the electric field or the field to allow the electric field or electric field to selectively control the heating line and or the long-wave coil It can also be achieved.

Look at this another modified embodiment.

It connects the light emitting elements of the resistor R33 and the diode D7, the operation selector switch SW2 and the port coupler PC in series between the constant voltage power lines, and the resistor R34 and the photo coupler between commercial AC lines. PC light receiving element and a resistor (R35) is connected, and at the same time to form an ultra-high frequency coil (L) provided in an electric yaw or electric field and a switching element (SCR) to control the driving power of the coil to form an output of the photo coupler It is connected to the trigger signal of the switching element, the ultra-high frequency drive unit 80 is formed by forming the operation selection switch (SW3) to block or apply the drive signal of the heating wire to the output terminal (40) of the second comparator.

This is achieved by using the same temperature control of the heating element in the use of an electric yoke or electric field plate as described above.

However, in addition to this action, in the electric yoke or electric field with the ultra-high coil (L) is installed, the user selects to control the heating wire (H) and the ultra-high coil (L) to operate at the same time or to operate only one of the two elements. Can be controlled.

In order to drive control the ultra-high frequency coil, when the operation selection switch SW2 is turned on, a trigger signal is applied to the switching element SCR through the photo coupler PC, and the switching element is conducted to the ultra-high frequency coil L. An alternating voltage is applied to generate ultra long waves. Of course, when the use of the heating wire is not necessary, such as in the summer, when the operation selection switch SW3 is turned off, the output of the second comparator, which is an input of the driving unit 40 that controls the heating wire, is blocked, and thus the heating wire does not operate.

Therefore, it is possible to control the heating wire and the microwave coil as one temperature controller regardless of winter and summer.

Next, the technical configuration as a modified embodiment of the temperature setting unit of the present invention will be described.

The temperature setting unit sets the bases of the transistors Q11 to Q14 so as to turn on the decode counter IC2, the push switch SW4 for inputting pulses to the counter, and the output terminals q1 to q4 of the decade counter at this output. Connect the resistors R41 to R44 to the collectors of the respective transistors, the emitters are grounded, and the other ends of the resistors are connected in series, and the other ends of the resistors R45 and R44 between the constant voltage power lines. Connect an output terminal ″ A ″ to connect the output of the divided voltage ratio to the second comparator as a comparison input, and connect LEDs LED11 to LED14 to the output terminals q1 to q4, respectively. The temperature setting unit 30a may be configured by connecting to each other.

The temperature setting unit using the decade counter sets a comparison input to the fourth comparator as the divided voltage value between the resistors R41 and R44 and the resistance R45 as compared with the configuration of setting the temperature using the rotary variable resistor. It is easy to set the temperature by applying the temperature value, and the change of this setting is output by the output of the decade counter IC2 sequentially changed according to the input frequency of the push switch SW4, and the corresponding transistor is turned on and the temperature is turned on. The setting acts to identify the LED that is connected to the selected output terminal.

According to the present invention as described in detail above, to solve the problem of the electromagnetic wave generated in the conventional electric yaw, electric field plate, and center the comparator for controlling the power supply of the heating wire in synchronization with the AC waveform to control the temperature of the heating element The circuit is very stable and simple in structure, and it is very economical because it is resistant to the surrounding noise and there are few failure factors, and it is possible to ground the electromagnetic wave generated from the heating wire to the ground wire (negative wire) of the power line of the thermostat. The electromagnetic shielding function and the state in which the electromagnetic wave is shielded are displayed on the temperature control device, so that the connection state of the power line capable of electromagnetic shielding can be easily identified. This is because the electromagnetic wave is grounded at any specific position of the AC power line, but it is not known, and thus, the troublesomeness is eliminated compared to the conventional method of checking the electromagnetic shielding state using a separate electromagnetic measuring device, and a separate electromagnetic measuring device must be provided. It is to have the effect of relieving the economic burden. At the same time, the display of the electromagnetic wave blocking operation has the effect of being able to visually display by LED or audible display by buzzer, and control the generation of ultra long wave that is beneficial to human body even in winter season using heating wire and summer season when use of heating wire is unnecessary. It is to provide a temperature control device for the heating element of the electric yo-yo, electric sheet that can be used for four seasons by forming a control device to use the function.

Claims (4)

Constant voltage power supply for rectifying AC voltage to control heating wire of electric yoke or electric blanket, AC sync pulse generator for generating sync pulse in commercial AC voltage cycle, temperature setting part 30 variablely set by external input, control by set temperature In the temperature control device comprising a heating control unit, Reinforcing the commercial AC power supply to form a constant voltage forming unit 10 for forming a constant voltage required for the circuit, and the output of the transistor (Q1) to form the same fuzzy type according to the AC cycle of the power supply unit of the comparator integrated circuit (COM IC) Connecting to a first comparator with a comparison input, and forming a reference voltage level with voltage divider resistors R6 and R7 between the constant voltage power lines and connecting the reference voltage to the comparator; The temperature setting unit 30 forms the divided voltages of the resistors R17 and R18 and the temperature setting variable resistor VR as the comparison voltage between the constant voltage power lines, and consists of the resistors R14 and R15 and the capacitor C3. Input the generated triangular wave with reference to the second comparator of the comparator integrated circuit (COM IC), respectively, and connect the output of the first comparator to the second comparator reference input terminal as reverse diodes D3 and D4. The second comparator reference output is connected to a driver 40 comprising resistors R19 and R20 and transistor Q3; The heating line control unit 50 controlled by the driving unit connects the heating line H and the switching triacs TH1 and TH2 between AC power lines to connect the output of the driving unit to the triac TH1 with a trigger pulse. , The comparator includes an overheat detector 60 configured to form a comparison input between the constant voltage power supply line using a reference input including resistors R8 and R9 and a divided value by resistors R10 to R12 and a temperature sensor S. Grounded with a resistor R16 at a connection point of a resistor R15 and a capacitor C3 connected to a third comparator of an integrated circuit COM IC and forming the triangular wave through a drive transistor Q2 at an output terminal of the comparator. Temperature control device of the heating element, characterized in that the connection between the steps. The transistor of claim 1, wherein the temperature setting unit is configured to turn on a decode counter IC2, a push switch SW4 for inputting a pulse to the counter, and an output terminal q1 to q4 of the decade counter at this output. Output terminals divided by connecting the bases of Q11 to Q14, connecting resistors R41 to R44 to collectors of each transistor, connecting the resistors in series, and connecting resistors R45 and R44 between the constant voltage power lines. ("A") and the emitter is grounded, and the output of the divided voltage ratio is connected to the second comparator as a comparison input, respectively, the LED (LED11 ~ LED14) connected to the output terminal (q1 ~ q4) between the ground line Temperature control unit of the heating element, characterized in that to form a temperature setting unit (30a). 3. A contact according to any one of claims 1 to 2, which is connected to a shield (77) and is made of a coupling capacitor (C5, C6) and a discharge resistor (R32) for grounding electromagnetic waves to one ground line of a commercial AC input terminal of a temperature control device. A reference voltage is formed between the branch portion 71 and the constant voltage power supply line by the divided voltage values of the resistors R23 and R24, and a comparison voltage between the resistors R27 and R28 and the capacitor C4 is formed to form the comparator integrated circuit ( A ground detection circuit (73) consisting of transistors (Q4, Q5) connected to a fourth comparator of the C0M IC), each of which is turned on to drop the comparison voltage according to the ground drive of the ground portion, to the ground portion 71. And a display portion (75) consisting of a resistor (R23), a transistor (Q6), and an electromagnetic wave blocking display LED (LED3) at an output terminal of the fourth comparator. The light emitting device of the resistor R33 and the diode D7, the operation selection switch SW2, and the porter coupler PC are connected in series between the constant voltage power supply line. A switching element for connecting a resistor (R34) and the light receiving element and the resistor (R35) of the photo coupler (PC) between the AC line, and intermittent the ultra-high-frequency coil (L) provided in the electric yaw or electric field and the driving power of the coil ( SCR) to connect the output of the photo coupler as the trigger signal of the switching element, and to form an operation selection switch SW3 to open and close the drive signal of the heating wire at the output of the driving unit 40 of the fourth comparator. Temperature control device of the heating element, characterized in that it comprises an ultra-wave drive unit (80).