CN204652337U - A kind of single fiery power taking intelligent control switch - Google Patents

Abstract

The utility model relates to an intelligent control switch for taking electricity from a single fire, comprising a bidirectional thyristor control unit, a rectification filter unit, a power supply module unit, a voltage stabilizing power supply unit, a one-way thyristor control unit and a low power consumption switch main control unit , the input terminal of the bidirectional thyristor control unit is connected to the live wire of the mains, and its first output terminal is connected to the input terminal of the rectification and filtering unit, and the output terminals of the rectification and filtering unit are respectively connected to the power module unit, the one-way thyristor control unit and the stabilizer The input terminal of the voltage supply unit is connected, the output terminal of the voltage-stabilized power supply unit is connected with the working voltage terminal of the low-power switch main control unit, and the output terminal of the low-power switch main control unit is passed through the one-way thyristor control unit, rectified and filtered The unit is connected to the control terminal of the bidirectional thyristor control unit, and the second output terminal of the bidirectional thyristor control unit is connected to the load. The utility model can not only carry high-power loads but also low-power loads, and when carrying high-power loads, it can greatly reduce the heat generation of components and parts, and improve reliability.

Description

An intelligent control switch for single fire

technical field

The utility model relates to a control switch for controlling power-on and power-off of electrical appliances, in particular to an intelligent control switch for taking power from a single fire.

Background technique

At present, smart control switches are more and more widely used, especially in smart home control systems. However, most smart switches require the connection of neutral and live wires to implement control, so an additional neutral wire needs to be arranged, which faces a big problem. Troubled, if the user uses the intelligent control switch, he must re-layout the power supply line, which brings a lot of trouble. In this context, the development of single-fire power-taking smart switches has become a hot spot, but the existing open-state single-fire power-taking smart switches generally have the following disadvantages: When carrying a high-power load, multiple devices generate heat, which is easy The switch is out of control; when the load is a low-power device, the current taken is too small to be driven; the on-state voltage regulation design is complicated and the cost is high; although there is an anti-surge design, the leakage current is too large.

Contents of the invention

The utility model mainly solves the technical problem that the original single-fire power-taking intelligent switch is equipped with a high-power load, and multiple devices generate heat so much that it is easy to cause the switch to be out of control. An intelligent control switch for taking power from a single fire, which can carry high-power loads and low-power loads, has a wide range of applications, and when carrying high-power loads, it can greatly reduce the heating of components and improve the reliability of the switch.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: the utility model includes a bidirectional thyristor control unit, a rectifier filter unit, a power supply module unit, a voltage stabilizing power supply unit, a one-way thyristor control unit and The main control unit of the low-power switch, the input terminal of the bidirectional thyristor control unit is the live wire input terminal of the intelligent control switch, connected to the mains live wire, the first output terminal of the bidirectional thyristor control unit and the input terminal of the rectification filter unit The output terminals of the rectification and filtering unit are respectively connected to the input terminals of the power module unit and the input terminal of the one-way thyristor control unit, and the output terminals of the power module unit and the output terminal of the one-way thyristor control unit are respectively connected to the voltage regulator The input terminal of the power supply unit is connected, the output terminal of the voltage-stabilized power supply unit is connected with the working voltage terminal of the low-power switch main control unit, and the output terminal of the low-power switch main control unit is connected with the control terminal of the one-way thyristor control unit , the output end of the one-way thyristor control unit is connected to the control end of the two-way thyristor control unit through the rectification and filtering unit, and the second output end of the two-way thyristor control unit is an intelligent control switch The FireWire output terminal is connected to the load. When in use, the other end of the load is connected to the neutral line of the mains. The low-power switch main control unit is controlled by the touch button, and the intelligent control switch can be turned on or off by touching the touch button. When the intelligent control switch is in the open state and a high-power load is connected, the main control unit of the low-power switch outputs a continuous high level, triggering the conduction of the one-way thyristor unit, and prompting the bidirectional thyristor unit to form a conduction loop , the high-power load is energized. When the intelligent control switch is in the open state and a low-power load is connected, because the current is too small to reach the trigger current of the triac control unit, the triac control unit does not work, and the current directly passes through the unidirectional thyristor control unit. The silicon-controlled control unit forms a loop to realize the function of carrying a small power load. The bidirectional thyristor control unit is in the front, and the design of the rectification filter unit and the one-way thyristor control unit is behind, which can not only prevent the rectification filter unit and the one-way thyristor control unit from heating, but also greatly reduce the temperature of the bidirectional thyristor. Overheating of the control unit. The utility model can carry high-power loads and small-power loads, and has a wide application range. When carrying high-power loads, only the bidirectional thyristor generates heat, and within an acceptable range, the reliability of the switch is improved.

As a preference, the bidirectional thyristor control unit includes an inductor L2, a resistor R6 and a triac SCR2, the rectification and filtering unit includes a rectifier bridge DR and a capacitor C4, and one end of the mains live line L is connected to the inductor L2, The other end of the inductance L2 is not only connected to pin 1 of the rectifier bridge DR but also to the T2 pole of the triac SCR2, pin 2 of the rectifier bridge DR is connected to the input end of the power module unit, and pin 4 of the rectifier bridge DR Grounding, the 3rd pin of the rectifier bridge DR is connected to the G pole of the bidirectional thyristor SCR2, the resistor R6 is connected between the G pole of the bidirectional thyristor SCR2 and the T1 pole, and the T1 pole of the bidirectional thyristor SCR2 is connected to the load The capacitor C4 is connected between pin 2 and pin 4 of the rectifier bridge DR.

Preferably, the one-way thyristor control unit includes a one-way thyristor SCR1, a diode D3, a resistor R7 and a voltage regulator DZ, the A pole of the one-way thyristor SCR1 and the output of the rectification and filtering unit The G pole of the one-way thyristor SCR1 is connected to the output end of the low-power switch main control unit, one of the K poles of the one-way thyristor SCR1 is grounded through the resistor R7, and the other is connected to the output terminal of the diode D3. The positive poles are connected, the negative pole of the diode D3 is not only connected with the negative pole of the voltage regulator DZ, but also connected with the input terminal of the voltage stabilizing power supply unit, and the positive pole of the voltage regulator DZ is grounded.

The design of bidirectional thyristor SCR2 in front, rectifier bridge DR and unidirectional thyristor SCR1 in the back design can not only make the rectifier bridge DR and unidirectional thyristor SCR1 not generate heat, but also greatly reduce the heat generation of bidirectional thyristor SCR2 . At the same time, this connection method enables the bidirectional thyristor SCR2 to be always controlled by the one-way thyristor SCR1, and at the same time, the bidirectional thyristor SCR2 always works in the first and third quadrants.

Preferably, the voltage stabilizing power supply unit includes a three-terminal voltage stabilizing block U1, an electrolytic capacitor E2, and an electrolytic capacitor E3, and the low-power switch main control unit includes a touch button TL and a touch chip U2, and the power module The unit includes a power module DY, the input end of the power module DY, one path is connected to the output end of the rectification filter unit through a resistor R2, the other path is grounded through a capacitor C1, the common end of the power module DY is grounded, and the output end of the power module DY , one path is grounded through the electrolytic capacitor E1, the other path is connected to the anode of the diode D2, the cathode of the diode D2 and the output end of the unidirectional thyristor control unit are respectively connected to the input end of the three-terminal voltage stabilizing block U1, and the three-terminal The input terminal of the voltage stabilizing block U1 is grounded through the electrolytic capacitor E2, the grounding terminal of the three-terminal voltage stabilizing block U1 is grounded, one output terminal of the three-terminal voltage stabilizing block U1 is grounded through the electrolytic capacitor E3, and the other is connected to the working voltage of the touch chip U2 The pin VDD is connected, and one path is grounded through the capacitor C3. The VREG pin of the touch chip U2 is grounded through the capacitor C2. The CX pin of the touch chip U2 is connected with the output end of the touch button TL through the resistor R4. The output pin of the chip U2 is connected to the anode of the diode D4 through the resistor R3, and the cathode of the diode D4 is connected to the control terminal of the one-way thyristor control unit. The resistance R2 and capacitor C1 at the input end of the power module DY are reasonably selected, and it is not easy to form a voltage spike when it is turned off, which protects the low-power power module DY. At the same time, the capacitor C1 is not too large to prevent some lamps from flickering at the moment of turning off .

As a preference, the low power consumption and high power single fire intelligent control switch includes an indicator light unit, the indicator light unit includes a light emitting diode D1 and a resistor R1, one end of the resistor R1 is connected to the output end of the power module unit, The other end of the resistor R1 is connected to the anode of the LED D1, and the cathode of the LED D1 is grounded. Light-emitting diode D1 is used as an indicator light to indicate the working state of the switch.

As a preference, the low-power and high-power single-fire intelligent control switch includes an anti-surge unit and a fuse F, the anti-surge unit is connected between the live wire input terminal and the live wire output terminal of the intelligent control switch, and the anti-surge The unit includes a gas discharge tube GDT and a varistor R5 connected in series, one end of the gas discharge tube GDT is connected to one end of the fuse F to form a live wire input terminal of an intelligent control switch, and the other end of the gas discharge tube GDT is connected through a varistor R5 and a bidirectional The second output end of the thyristor control unit is connected to form the live wire output end of the intelligent control switch, and the other end of the fuse F is connected to the input end of the bidirectional thyristor control unit. In this solution, the anti-surge function is realized by the series connection of the piezoresistor R5 and the gas discharge tube GDT. Since the leakage current of the varistor R5 is very large, and the internal resistance of the gas discharge tube GDT is very large, the two are connected in series to reduce the leakage current. Gas discharge tube GDT can also use glass discharge tube.

The beneficial effects of the utility model are: it can carry both high-power load and low-power load, and has a wide range of applications, and when carrying a high-power load, it greatly reduces the heating of components, improves the reliability of the switch, and resists surges while leaking The current is very small, the design of the on-state voltage regulator is simple, and the cost is low.

Description of drawings

Fig. 1 is a block diagram of circuit principle connection structure of the utility model.

Fig. 2 is a schematic circuit diagram of the utility model.

In the figure 1. Triac control unit, 2. Rectifier filter unit, 3. Power module unit, 4. Stabilized power supply unit, 5. One-way thyristor control unit, 6. Low power switch main control unit, 7. Indicator light unit, 8. Anti-surge unit, 10. Firewire input terminal, 20. Firewire output terminal.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment: A low-power high-power single-fire intelligent control switch of this embodiment, as shown in FIG. Unit 4, one-way thyristor control unit 5, low-power switch main control unit 6, indicator light unit 7, anti-surge unit 8 and fuse F, the live wire input terminal 10 of the intelligent control switch passes through fuse F and two-way controllable The input end of the silicon control unit 1 is connected, the first output end of the triac control unit 1 is connected with the input end of the rectification filter unit 2, the output end of the rectification filter unit 2 is respectively connected with the input end of the power module unit 3, the one-way The input end of the thyristor control unit 5 is connected, the output end of the power module unit 3 and the output end of the one-way thyristor control unit 5 are respectively connected with the input end of the voltage stabilizing power supply unit 4, and the output end of the power module unit 3 is also It is connected with the indicator light unit 7, the output end of the voltage-stabilized power supply unit 4 is connected with the working voltage end of the low-power switch main control unit 6, and the output end of the low-power switch main control unit 6 is connected with the one-way thyristor control unit 5 The control terminal of the one-way thyristor control unit 5 is connected to the control terminal of the two-way thyristor control unit 1 through the rectification filter unit 2, and the second output terminal of the two-way thyristor control unit 1 is the intelligent The live wire output terminal 20 of the control switch. The anti-surge unit 8 is connected between the live wire input end 10 and the live wire output end 20 of the intelligent control switch. During use, the live wire input terminal 10 of the intelligent control switch is connected to the mains live wire L, and the live wire output terminal 20 of the intelligent control switch is connected to a load, such as a lighting lamp.

As shown in Figure 2, the anti-surge unit 8 includes a gas discharge tube GDT and a piezoresistor R5 connected in series; the bidirectional thyristor control unit 1 includes an inductor L2, a resistor R6, and a triac SCR2; the rectification and filtering unit 2 includes Rectifier bridge DR and capacitor C4; one-way thyristor control unit 5 includes one-way thyristor SCR1, diode D3, resistor R7 and voltage regulator tube DZ; voltage stabilizing power supply unit 4 includes three-terminal voltage stabilizing block U1, electrolytic capacitor E2 and electrolytic capacitor E3, the three-terminal voltage stabilizing block U1 adopts a 7133-1 three-terminal voltage stabilizing block; the low-power switch main control unit 6 includes a touch button TL, a touch chip U2, and the touch chip U2 adopts a 227AXX touch chip; the power module unit 3 It includes a power module DY, and the power module DY adopts a DY10-6 power module; the indicator light unit 7 includes a light emitting diode D1 and a resistor R1. One end of the gas discharge tube GDT is connected to one end of the fuse F to form the live wire input terminal 10 of the intelligent control switch, and the other end of the gas discharge tube GDT is connected to the T1 pole of the bidirectional thyristor SCR2 through the piezoresistor R5 to form the live wire of the intelligent control switch The output terminal 20, the other end of the fuse F is connected to one end of the inductance L2, the other end of the inductance L2 is not only connected to the 1 pin of the rectifier bridge DR but also connected to the T2 pole of the bidirectional thyristor SCR2, and the 2 pin of the rectifier bridge DR, all the way The resistor R2 is connected to the input terminal of the power module DY (pin 1 of the power module DY), the other is connected to the A pole of the unidirectional thyristor SCR1, the 4 pin of the rectifier bridge DR is grounded, the 3 pin of the rectifier bridge DR is connected to the bidirectional The G poles of the thyristor SCR2 are connected, the resistor R6 is connected between the G poles of the bidirectional thyristor SCR2 and the T1 poles, and the capacitor C4 is connected between pins 2 and 4 of the rectifier bridge DR. Pin 1 of the power module DY is grounded through the capacitor C1, the common terminal of the power module DY (pin 2 of the power module DY) is grounded, and the output terminal of the power module DY (pin 3 of the power module DY) is grounded through the electrolytic capacitor E1. The other path is connected to the anode of the diode D2, and another path is connected to the anode of the light-emitting diode D1 through the resistor R1, the cathode of the light-emitting diode D1 is grounded, the cathode of the diode D2 is connected to the input terminal of the three-terminal voltage regulator U1 (the three-terminal voltage regulator block Pin 1 of U1) is connected, pin 1 of the three-terminal voltage stabilizing block U1 is grounded through the electrolytic capacitor E2, pin 2 of the three-terminal voltage stabilizing block U1 is grounded, and the output terminal of the three-terminal voltage stabilizing block U1 (of the three-terminal voltage stabilizing block U1 3 pins), one is grounded through the electrolytic capacitor E3, the other is connected to the working voltage pin VDD of the touch chip U2 (the 5 pin of the touch chip U2), and the other is grounded through the capacitor C3, and the VREG pin of the touch chip U2 (the touch chip U2 Pin 4 of the touch button) is grounded through capacitor C2, pin CX of the touch chip U2 (pin 6 of the touch chip U2) is connected to the output end of the touch button TL through a resistor R4, pin GND of the touch chip U2 (pin 2 of the touch chip U2) is grounded , the output pin of the touch chip U2 (pin 1 of the touch chip U2) is connected to the anode of the diode D4 through the resistor R3, the cathode of the diode D4 is connected to the G pole of the one-way thyristor SCR1, and the K pole of the one-way thyristor SCR1 , one path is grounded through resistor R7, the other path is connected to the anode of diode D3, the cathode of diode D3 is not only connected to the cathode of regulator DZ, but also connected to pin 1 of three-terminal regulator U1, and the anode of regulator DZ is grounded . In this embodiment, the live wire input terminal 10 of the intelligent control switch is connected to the mains live wire L, the live wire output terminal 20 of the intelligent control switch is connected to one end of the lighting lamp LIGHT, and the other end of the lighting lamp LIGHT is connected to the mains neutral wire N.

By touching the touch button, the intelligent control switch can be turned on or off. When the intelligent control switch is in the off state, the grid power supply (mains live line L, mains neutral line N) is full-wave rectified by the rectifier bridge DR, filtered by the capacitor C1, and then sent to the low-power power module DY. The ground pin of the module DY is connected to the ground terminal of the rectifier bridge DR to form a loop. The power module DY converts the obtained high-voltage small current into a low-voltage (stable voltage) large current. The terminal voltage regulator U1 and the three-terminal voltage regulator U1 convert the obtained voltage into the voltage required by the low-power intelligent touch chip U2, and continuously supply power to the touch chip U2, so that the touch chip U2 is always in a standby state.

When the intelligent control switch is on and the connected lighting lamp LIGHT is a high-power lamp, pin 1 of the low-power intelligent touch chip U2 outputs a continuous high level, triggering the conduction of the one-way thyristor SCR1, and the one-way The conduction of the silicon controlled rectifier SCR1 prompts the bidirectional thyristor SCR2 to form a conduction loop, thereby turning on the lighting lamp LIGHT. Since the grid voltage is alternating current, the bidirectional thyristor SCR2 will commutate and conduct at a certain frequency, and a voltage spike will be generated at the moment of commutation, thereby forming a current, flowing through the one-way thyristor SCR1, and part of the current will flow back through the resistor R7 In the power grid, another part of the current flows through the diode D3 and is filtered by the electrolytic capacitor E2, and then flows back to the power grid through the Zener diode DZ. The three-terminal voltage stabilizing block U1 converts the obtained stabilizing voltage into the voltage required by the touch chip U2, thereby forming a dynamic balance in an open state.

When the intelligent control switch is on and the connected lighting lamp LIGHT is a low-power lamp, because the current is too small to reach the trigger current of the triac SCR2, the triac SCR2 does not work, and the current directly passes through the unidirectional The thyristor SCR1 forms a loop, so as to realize the function of carrying a small power load.

When pin 1 of the low-power smart touch chip U2 outputs a high level, since the bidirectional thyristor SCR2 is not yet turned on, the current directly flows through the one-way thyristor SCR1, thereby controlling the conduction of the entire circuit.

When pin 1 of the low-power smart touch chip U2 outputs a low level, the current flowing through the one-way thyristor SCR1 and full-wave rectified by the rectifier bridge DR is zero-crossed and cut off, thereby controlling the shutdown of the entire circuit.

When the utility model is equipped with a high-power load, the heating of components is greatly reduced, and the load as small as 1W can also be carried. The voltage spike generated by the bidirectional thyristor SCR2 when changing the conduction direction continuously supplies power to the subsequent circuit. It has an anti-surge design and ensures anti-surge while the leakage current is small. The resistor R2 and capacitor C1 at the input terminal of the power module are reasonably selected. For example, the resistor R2 is 200K, and the capacitor C1 is 470nF/400V. Some lights do not flicker when turned off. The utility model has the advantages of simple design and low cost for the voltage stabilization in the open state.

Claims (6)

1. An intelligent control switch for taking electricity from a single fire, characterized in that it comprises a bidirectional thyristor control unit (1), a rectifier filter unit (2), a power supply module unit (3), a voltage stabilizing power supply unit (4), a one-way The thyristor control unit (5) and the low-power switch main control unit (6), the input terminal of the bidirectional thyristor control unit (1) is the live wire input terminal (10) of the intelligent control switch, connected to the mains live wire L , the first output end of the bidirectional thyristor control unit (1) is connected to the input end of the rectification filter unit (2), and the output end of the rectification filter unit (2) is respectively connected to the input end of the power module unit (3), the one-way The input terminals of the thyristor control unit (5) are connected, the output terminals of the power module unit (3) and the output terminals of the one-way thyristor control unit (5) are respectively connected with the input terminals of the voltage stabilizing power supply unit (4), The output end of the voltage stabilizing power supply unit (4) is connected to the working voltage end of the low-power switch main control unit (6), and the output end of the low-power switch main control unit (6) is connected to the one-way thyristor control unit (5 ), the output terminal of the unidirectional thyristor control unit (5) is connected to the control terminal of the described bidirectional thyristor control unit (1) through the rectification filter unit (2), and the bidirectional thyristor control unit (1) is connected to each other. The second output terminal of the silicon-controlled control unit (1) is the live wire output terminal (20) of the intelligent control switch, which is connected to the load. 2. A kind of single-fire power-taking intelligent control switch according to claim 1, characterized in that said triac control unit (1) comprises inductance L2, resistor R6 and triac SCR2, said The rectification and filtering unit (2) includes a rectification bridge DR and a capacitor C4, the mains live wire L is connected to one end of the inductance L2, and the other end of the inductance L2 is connected to both the pin 1 of the rectification bridge DR and the T2 pole of the bidirectional thyristor SCR2 , pin 2 of the rectifier bridge DR is connected to the input terminal of the power module unit (3), pin 4 of the rectifier bridge DR is grounded, pin 3 of the rectifier bridge DR is connected to the G pole of the bidirectional thyristor SCR2, and the resistor R6 is connected to Between the G pole and the T1 pole of the bidirectional thyristor SCR2, the T1 pole of the bidirectional thyristor SCR2 is connected to the load, and the capacitor C4 is connected between pin 2 and pin 4 of the rectifier bridge DR. 3. A kind of intelligent control switch for taking electricity from single fire according to claim 1, characterized in that said one-way thyristor control unit (5) comprises one-way thyristor SCR1, diode D3, resistor R7 and stabilizer The pressure tube DZ, the A pole of the one-way thyristor SCR1 is connected with the output terminal of the rectification filter unit (2), the G pole of the one-way thyristor SCR1 is connected with the low power switch main control unit (6 ), the K pole of the one-way thyristor SCR1 is connected to the ground through the resistor R7, and the other is connected to the positive pole of the diode D3. The negative pole of the diode D3 is connected to the negative pole of the Zener tube DZ, and to The input terminals of the voltage stabilizing power supply unit (4) are connected, and the positive electrode of the voltage stabilizing tube DZ is grounded. 4. According to claim 1, 2 or 3, an intelligent control switch for taking power from a single fire, characterized in that the voltage stabilizing power supply unit (4) includes a three-terminal voltage stabilizing block U1, an electrolytic capacitor E2 and an electrolytic capacitor E3, the low-power switch main control unit (6) includes a touch button TL and a touch chip U2, and the power module unit (3) includes a power module DY, an input terminal of the power module DY, a channel through a resistor R2 and The output ends of the rectification and filtering unit (2) are connected, the other path is grounded through the capacitor C1, the common end of the power module DY is grounded, the output end of the power module DY is connected to the ground through the electrolytic capacitor E1, and the other path is connected to the positive pole of the diode D2 connected, the negative pole of the diode D2 and the output end of the one-way thyristor control unit (5) are respectively connected to the input end of the three-terminal voltage stabilizing block U1, and the input end of the three-terminal voltage stabilizing block U1 is grounded through the electrolytic capacitor E2 , the ground terminal of the three-terminal voltage stabilizing block U1 is grounded, one output terminal of the three-terminal voltage stabilizing block U1 is grounded through the electrolytic capacitor E3, the other is connected to the working voltage pin VDD of the touch chip U2, and the other is grounded through the capacitor C3. The VREG pin of the touch chip U2 is grounded through the capacitor C2, the CX pin of the touch chip U2 is connected to the output terminal of the touch button TL through the resistor R4, the GND pin of the touch chip U2 is grounded, and the output pin of the touch chip U2 is connected through the resistor R3 and the diode D4. The anodes are connected, and the cathode of the diode D4 is connected to the control terminal of the one-way thyristor control unit (5). 5. According to claim 1 or 2 or 3 described a kind of intelligent control switch for taking electricity from a single fire, it is characterized in that it includes an indicator light unit (7), and the indicator light unit (7) includes a light emitting diode D1 and a resistor R1, and the resistor R1 One end of the resistor R1 is connected to the output end of the power module unit (3), the other end of the resistor R1 is connected to the positive pole of the light emitting diode D1, and the negative pole of the light emitting diode D1 is grounded. 6. According to claim 1, 2 or 3, an intelligent control switch for taking electricity from a single fire is characterized in that it includes an anti-surge unit (8) and a fuse F, and the anti-surge unit (8) is connected to the intelligent control switch Between the live wire input terminal (10) and the live wire output terminal (20), the anti-surge unit (8) includes a gas discharge tube GDT and a piezoresistor R5 connected in series, and one end of the gas discharge tube GDT is connected to one end of the fuse F It constitutes the live wire input terminal (10) of the intelligent control switch, and the other end of the gas discharge tube GDT is connected to the second output terminal of the bidirectional thyristor control unit (1) through the piezoresistor R5 to form the live wire output terminal (20) of the intelligent control switch. ), the other end of the fuse F is connected to the input end of the triac control unit (1).