JP3106327U - Electric blanket control structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control structure of an electric blanket capable of preventing an electric heating part which receives a larger voltage change instantaneously from generating an electromagnetic wave.
SOLUTION: A voltage falling rectifier circuit 1, a gate control circuit 2, a zero voltage passage detection circuit 3, a trigger circuit 4, a central processing circuit 5, a push button circuit 6, a liquid crystal display circuit 7, a voltage detection circuit 8, a current detection circuit 9 Install a combination such as The central processing circuit 5 has a central processing unit U1 and is connected to the zero voltage passage detection circuit 3, the trigger circuit 4, the push button circuit 6, the liquid crystal display circuit 7, the voltage detection circuit 8, and the current detection circuit 9. By receiving the signal detected by the zero voltage passage detection circuit 3 and outputting the signal, the trigger circuit 4, the gate control circuit 2, and the electric heating part can be controlled to operate. When the AC voltage approaches the zero voltage, the electric heating parts can be activated in response to the AC voltage, and it is possible to prevent the electric heating parts which have received a larger voltage change instantaneously from generating electromagnetic waves.
[Selection diagram] Fig. 1

Description

  The present invention relates to a control structure for an electric blanket.

  Conventionally known electric blankets are mainly connected to AC electricity (for example, AC 110V, 220V), and by providing and connecting a control switch, when the control switch is activated, the AC electricity flows to the electric heating parts, and the heat energy is transferred. It is generated and heats the human body. At present, as shown in FIG. 4, the alternating current voltage and current of alternating current electricity change as a sine wave over time, and 60 times per second at 60 Hz of ordinary urban electricity. A voltage change of the sine wave T1 occurs, and at the top position of the wave, the voltage value is the highest position at a2 and a4.

  However, as shown in FIG. 5, if the user turns on the power using the control switch, if the turning-on time b comes to correspond to the position of the top a2 of the wave, AC electricity is applied to the electric heating part of the electric blanket. Flow, the voltage rises from zero voltage to the voltage of the top value of the instantaneous wave. At that moment, a large change in voltage causes noise and electromagnetic waves, and when the electromagnetic waves enter the human body, the health is impaired (electromagnetic waves from mobile phones) Like the injury to the human body). Since the user could not effectively control the time for energizing the electric heating parts of the electric blanket, when the energizing time of the electric blanket corresponded to the position where the AC voltage value was larger, it was based on the pulse change of the instantaneous current. Electromagnetic waves are liable to be generated, harm human health, and if used for a long time, cause further damage to the human body.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a control structure of an electric blanket which can prevent an electric heating part which receives a large voltage change instantaneously from generating an electromagnetic wave.

  In order to achieve the above object, the control structure of the electric blanket according to the claims of the present invention includes a voltage falling rectifier circuit, a gate control circuit, a zero voltage passage detection circuit, a trigger circuit, a central processing circuit, a push button circuit, a liquid crystal. Install a combination of display circuit, voltage detection circuit, current detection circuit, etc. Also, connect the voltage drop rectifier circuit to AC city electricity, install current limit resistance and capacitor current limit on the input side, and connect and connect a bridge type voltage drop rectifier circuit consisting of four diodes and one zener diode. . The zener diode makes the constant voltage 12 V.

  A wave filter circuit comprising two forward and reverse diodes arranged in parallel and two capacitors is provided to generate a VCC DC power supply. In the wave filter circuit, a voltage of VDD 5 V is generated by a constant voltage circuit including a Zener diode, a resistance, a transistor, and a capacitor.

  The gate control circuit is provided with a TAIAC thyristor and is connected in series with an input AC power supply. Also provided is an electric heating part of an electric blanket for connection thereto, and a gate for connection to the trigger circuit.

  The zero voltage passage detection circuit is provided with a current limiting resistance having a large impedance, is connected in series with the AC power supply, and has an NPN transistor B pole connected to the current limiting resistance. The transistor C pole is connected to the central processing circuit.

  The input side of the trigger circuit 4 is connected to the central processing circuit, and is provided with an enlargement circuit. A light emitting diode is provided, and the output side is connected to the gate of the gate control path TAIAC.

  The central processing circuit has a central processing unit and is connected to a zero voltage passage detection circuit, a trigger circuit, a push button circuit, a liquid crystal display circuit, a voltage detection circuit, and a current detection circuit. A signal detected by the zero-voltage passage detection circuit is received, and the signal can be output so that the trigger circuit, the gate control circuit, and the electric heating part can be controlled to operate.

  As a result, when the AC voltage approaches the zero voltage, the electric heating parts can be activated correspondingly, and it is also possible to prevent the electric heating parts that received a larger voltage change instantaneously from generating electromagnetic waves, and it is also possible to prevent the transformer from The effect of the convenience is reduced because the installation is reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, in the embodiment of the present invention, in the control structure of the electric blanket, the voltage falling rectifier circuit 1, the gate control circuit 2, the zero voltage passage detection circuit 3, the trigger circuit 4, the central processing circuit 5, A combination of a push button circuit 6, a liquid crystal display circuit 7, a voltage detection circuit 8, a current detection circuit 9, and the like is provided. In addition, the voltage drop rectifier circuit 1 is connected to AC city electricity (100V-240V), a current limit resistance R1, a capacitor C1 current limit is installed on the input side, and four diodes D2, D3, D4, D5 and one Zener diode A bridge type voltage drop rectifier circuit composed of D1 is provided and connected, and the constant voltage becomes 12 V by the Zener diode D1.

  A wave filter circuit comprising two forward and reverse diodes D6 and D7 in parallel and two capacitors C2 and C3 is provided to generate a VCC DC power supply. In the wave filter circuit, a voltage of VDD5V is generated by a constant voltage circuit including a Zener diode D8, an electric resistance R2, a transistor Q1, and capacitors C4 and C5.

  The gate control circuit 2 has a TAIAC thyristor, is connected in series with an input AC power supply, and is provided with an electric heating part 91 of an electric blanket and is connected thereto. The gate is connected to the trigger circuit 4.

  The zero voltage passage detection circuit 3 has a large impedance current limiting resistance R3 and is in series with the AC power supply. The current limiting resistance R3 is provided with an NPN transistor Q2B pole, and the transistor Q2C pole is connected to the central processing circuit 5.

  The input side of the trigger circuit 4 is connected to the central processing circuit 5 and has an expansion circuit consisting of Q3, Q4, Q5, R4, R5, R6, R7, R8, R9, R10. A light emitting diode D9 is provided, and the output side is connected to the gate of TAIAC of the gate control circuit 2.

  The central processing circuit 5 has a central processing unit U1 and is connected to the zero voltage passage detection circuit 3, the trigger circuit 4, the push button circuit 6, the liquid crystal display circuit 7, the voltage detection circuit 8, and the current detection circuit 9. The signal detected by the zero-voltage passage detection circuit 3 is received, and by outputting the signal, the trigger circuit 4, the gate control circuit 2, and the electric heating part 91 can be controlled to operate.

The push button circuit 6 has a switch such as a start switch and a timer.
Further, the liquid crystal display circuit 7 can display related information such as temperature and time.
The voltage detection circuit 8 and the power supply detection circuit 9 can detect the current passing through the electric heating part 91 and the voltage at both ends. When the electric heating part 91 is short-circuited or interrupted (interrupted or dropped), an abnormality is detected and the center is detected. By controlling the operation to be cut off by the processor U1 and not sending power to the electric heating part 91, higher security can be obtained.

  As shown in FIG. 3, in this embodiment, when the control structure is connected to AC city electricity, the voltage drop rectifier circuit 1 can be operated, and a VCC DC power supply and a VDD DC power supply are generated. When the start switch of the push button circuit 6 is pressed, the central processing unit U1 waits for a signal from the zero-voltage passage detection circuit 3 at the same time that the central processing unit U1 receives the signal. The zero voltage passage detection circuit 3 changes the transistor Q2 from blocking to passing as soon as the AC voltage rises from the low voltage to 0.6V and approaches the zero voltage, and changes the transistor C pole from the high potential to the low potential. .

  In addition, the zero voltage passage detection circuit 3 changes the transistor Q2 from passing to stopping as soon as the AC voltage drops from the high voltage to less than 0.6V and approaches the zero voltage, and changes the transistor C from the low potential to the high potential. Let it. When the above-mentioned potential change (such as the positions b1, b2, b3 in FIG. 3) is received by the central processing unit U1, a signal is output and the trigger circuit 4 can be operated. Further, the trigger circuit 4 is increased in pressure and output, and is passed through the thyristor TRIAC of the gate control circuit 2 and is operated to input AC electricity to the electric heating part 91 to generate heat in the electric blanket, so that the AC voltage is reduced to zero voltage. When approaching, the electric heating part 91 can be activated correspondingly. Also, it is possible to prevent the electric heating part 91 from receiving an instantaneously large voltage change and generating an electromagnetic wave.

  Therefore, as described above, when the electric blanket is operated by the structure of the present embodiment, it is possible to prevent the generation of a larger electromagnetic wave and also to prevent the electromagnetic wave from being injured to the human body, thereby increasing the safety in use. In addition, the voltage drop rectifier circuit of the present invention does not require a large-volume transformer, so that the volume and weight of parts of the control structure can be greatly reduced, and the effect is more convenient.

FIG. 4 is an image diagram of a circuit block showing a control structure of the electric blanket according to the embodiment of the present invention. FIG. 4 is an image diagram of a circuit showing a control structure of the electric blanket according to the embodiment of the present invention. FIG. 4 is a schematic view illustrating a control structure of an electric blanket according to an embodiment of the present invention, showing a time when an electric heating part operates. It is an image figure showing the waveform of alternating current electricity. It is an image figure showing an example of an energization time with a conventionally known electric blanket.

Explanation of reference numerals

1 voltage falling rectifier circuit, 2 gate control circuit, 3 zero voltage passage detection circuit, 4 trigger circuit, 5 central processing circuit, 6 push button circuit, 7 liquid crystal display circuit, 8 voltage detection circuit, 9 current detection circuit, 91 heating parts

Claims (5)

A control structure for an electric blanket, comprising a combination of a voltage drop rectifier circuit, a gate control circuit, a zero voltage passage detection circuit, a trigger circuit, a central processing circuit, a push button circuit,
The gate control circuit has a thyristor, is in series with the input AC power supply, connects with the electric heating part of the electric blanket, the gate control circuit connects with the trigger circuit,
The zero voltage passage detection circuit is connected to the AC power supply, connected to the central processing circuit, and when it detects that the AC voltage approaches 0 voltage, it can output a signal to the gate of the gate control circuit,
The input side of the trigger circuit is connected to the central processing circuit, the output side is connected to the gate of the gate control circuit,
The central processing circuit has a central processing unit and is connected to the zero voltage crossing detection circuit, trigger circuit, push button circuit, can receive the signal detected by the zero voltage crossing detection circuit, output it, and trigger It can be controlled to operate the circuit, gate control circuit, electric heating parts,
When the zero voltage passage detection circuit detects that the AC voltage approaches the zero voltage, the electric heating part (91) can be activated correspondingly and the electric heating part (91) receives a larger voltage change momentarily. A control structure for an electric blanket, wherein generation of electromagnetic waves can be prevented.   The gate control circuit (2) is a TAIAC thyristor, which is in series with the input AC power supply, is connected to the electric heating part (91) of the electric blanket, and the gate is connected to the trigger circuit (4). 2. The control structure for an electric blanket according to claim 1.   The zero voltage passage detection circuit (3) has a current limiting resistance (R3) having a large impedance and is connected in series with the AC power supply. The B pole of the NPN transistor (Q2) is connected to the current limiting resistance (R3). The control structure for an electric blanket according to claim 1, wherein the C pole of (Q2) is connected to the central processing circuit (5).   The input side of the trigger circuit (4) is connected to the central processing circuit (5) and has an enlargement circuit, and the output side is connected to the gate of the TAIAC of the gate control circuit (2). The control structure for an electric blanket according to claim 1.   The voltage drop rectifier circuit is connected to an AC power supply, a current limit resistor and a capacitor current limit are installed on the input side, and a bridge type voltage drop rectifier circuit composed of four diodes and one zener diode is provided. The voltage becomes 12V, and a wave filter circuit consisting of two forward and reverse diodes in parallel and two capacitors is provided to generate a VCC DC power supply, and the wave filter circuit comprises a Zener diode, a resistance, a transistor, and a capacitor. The control structure for an electric blanket according to claim 1, wherein the VDD voltage is generated by a constant voltage circuit.

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