A single-wire wall-controlled knob voltage-dividing speed regulation and switching circuit

Abstract

The invention discloses a single-line wall-controlled knob voltage-dividing speed regulation and switch circuit, comprising a power input terminal AC1 and a power input terminal AC2, wherein the power input terminal AC2 is connected with a load and a knob switch level detection circuit in sequence, an AC filter circuit is connected between the power input terminal AC1 and the knob switch level detection circuit, the AC filter circuit is connected with an initial power-on circuit, a rectifier voltage-stabilizing circuit and a zero-crossing detection circuit in sequence, the knob switch level detection circuit is connected with an MCU circuit connected with the zero-crossing detection circuit, the MCU circuit is connected with a drive circuit, the drive circuit is respectively connected with the load and the AC filter circuit, the rectifier voltage-stabilizing circuit is connected with the knob switch level detection circuit and the MCU circuit for power supply, the knob switch level detection circuit is connected in series with one of the power input lines, and the knob switch integrating the voltage-dividing speed regulation and the power main switch is used to control the load of the fan controller to change the speed of each gear or to operate OFF, thereby realizing the single-line series control function of the wall controller.

Description

[Technical field]

[0001] The utility model relates to a single-line wall-controlled knob voltage-dividing speed-regulating and switching circuit. [Background Technology]

[0002] Among the existing wall controllers used to control the gears of fans or lamps, mechanical wall controls are generally used, or electric controls that directly reduce the voltage of capacitors to select gears, or remote controls that transmit wireless signals to the drivers of the connected lamps or fans through the panel buttons of the wall controller. All of the above forms require the connection of multiple power cords, which is not convenient for wiring layout. On the other hand, mechanical wall controllers also have the problem of being insensitive after long-term use; capacitor step-down devices have limited gear settings, and will generate a certain amount of leakage current during operation, which may pose a risk of electric shock to users if they are not designed or manufactured properly. At the same time, the performance of capacitors may change after long-term use or in high-temperature environments, further increasing safety hazards; wireless wall controllers rely on wireless signals for communication, so they may be affected by signal interference or signal range limitations. If the signal is unstable or interfered with, it may cause control command transmission failure or delay, thereby affecting the user's experience. [Contents of the utility model]

[0003] The utility model overcomes the shortcomings of the prior art and provides a single-line wall-controlled knob voltage-dividing speed regulation and switch circuit.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit, characterized in that it includes a power input terminal AC1 and a power input terminal AC2, the power input terminal AC2 is sequentially connected to a load and a knob switch level detection circuit for inputting a knob gear position signal, an AC filter circuit for filtering AC electricity is connected between the power input terminal AC1 and the knob switch level detection circuit, the AC filter circuit is sequentially connected to an initial power-on circuit for taking power for the first time, a rectifier and voltage regulator circuit for rectifying and stabilizing the input power supply, and a zero-crossing detection circuit for detecting a zero-crossing signal of the rectifier and voltage regulator circuit, the knob switch level detection circuit is connected to an MCU circuit connected to the zero-crossing detection circuit for receiving a knob gear position signal and a zero-crossing signal and outputting a corresponding gear position control signal, the MCU circuit is connected to a drive circuit respectively connected to the knob switch level detection circuit, the AC filter circuit, and the rectifier and voltage regulator circuit, driving the load to work according to the gear position control signal and enabling the AC filter circuit to supply power to the rectifier and voltage regulator circuit, and the rectifier and voltage regulator circuit supplies power to the knob switch level detection circuit and the MCU circuit respectively.

[0006] A single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit as described above is characterized in that: the knob switch level detection circuit includes a knob switch SW1, the knob switch SW1 pin COM is connected to the MCU circuit, the knob switch SW1 pin P1 is connected to the AC filter circuit, the knob switch SW1 pin P2 is connected to one end of the load, the knob switch SW1 pin 2 is connected to the rectifier and voltage-stabilizing circuit through a resistor R14, the knob switch SW1 pin 3 is connected to the rectifier and voltage-stabilizing circuit through a resistor R13, the knob switch SW1 pin 4 is connected to the rectifier and voltage-stabilizing circuit through a resistor R12, the knob switch SW1 pin 5 is connected to the rectifier and voltage-stabilizing circuit through a resistor R11, the knob switch SW1 pin 6 is connected to the rectifier and voltage-stabilizing circuit through a resistor R10, the knob switch SW1 pin 7 is connected to the rectifier and voltage-stabilizing circuit through a resistor R9, the knob switch SW1 pin 8 is connected to the rectifier and voltage-stabilizing circuit through a resistor R8, and the knob switch SW1 pin 9 is connected to the rectifier and voltage-stabilizing circuit through a resistor R7.

[0007] A single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit as described above is characterized in that: the AC filter circuit includes a capacitor CX1, one end of the capacitor CX1 is respectively connected to the knob switch level detection circuit, the initial power-on circuit, and the drive circuit, the other end of the capacitor CX1 is respectively connected to one end of the inductor L6 and the drive circuit, and the other end of the inductor L6 is connected to the input terminal AC1 through the fuse FUSE1.

[0008] The single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit as described above is characterized in that the initial power-on circuit includes a diode D1, the positive terminal of the diode D1 is connected to the AC filter circuit through a resistor R1, and the negative terminal of the diode D1 is connected to the rectifier and voltage stabilizing circuit.

[0009] A single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit as described above is characterized in that: a rectifier and voltage-stabilizing circuit includes a rectifier bridge DB1, pin 1 of the rectifier bridge DB1 is respectively connected to a zero-crossing detection circuit and a positive terminal of a diode D2, pin 2 of the rectifier bridge DB1 is connected to a drive circuit, pin 3 of the rectifier bridge DB1 is grounded, pin 4 of the rectifier bridge DB1 is connected to an AC filter circuit, a negative terminal of the diode D2 is respectively connected to an initial power-on circuit, a positive terminal of an electrolytic capacitor EC1, a negative terminal of a voltage-stabilizing diode ZD6, one end of a capacitor C4, and pin 2 of a voltage-stabilizing chip U1, pin 3 of the voltage-stabilizing chip U1 is respectively connected to a positive terminal of an electrolytic capacitor EC3 and one end of a capacitor C7, a negative terminal of an electrolytic capacitor EC1, a positive terminal of a voltage-stabilizing diode ZD6, the other end of a capacitor C4, pin 1 of the voltage-stabilizing chip U1, a negative terminal of an electrolytic capacitor EC3, and the other end of a capacitor C7 are respectively grounded, and pin 3 of the voltage-stabilizing chip U1 outputs a 5V power supply to supply power to a knob switch level detection circuit and an MCU circuit respectively.

[0010] A single-wire wall-controlled knob voltage-dividing speed regulation and switching circuit as described above is characterized in that: the zero-crossing detection circuit includes a diode D3, the positive terminal of the diode D3 is connected to the rectifier and voltage-stabilizing circuit, the negative terminal of the diode D3 is connected to the MCU circuit, the negative terminal of the voltage-stabilizing diode ZD1, and one end of the capacitor C1 through a resistor R17, and the positive terminal of the voltage-stabilizing diode ZD1 and the other end of the capacitor C1 are grounded respectively.

[0011] A single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit as described above is characterized in that: the MCU circuit includes a control chip U2, the pin 1 of the control chip U2 is respectively connected to the rectifier voltage stabilization circuit, one end of the resistor R5, and one end of the capacitor C3, the other end of the resistor R5, the other end of the capacitor C3, and the pin 8 of the control chip U2 are respectively grounded, the pin 2 of the control chip U2 is respectively connected to one end of the capacitor C16 and one end of the resistor R6, the other end of the resistor R6 is respectively connected to the knob switch level detection circuit and one end of the resistor 21, the other end of the capacitor C16 and the other end of the resistor R21 are respectively grounded, the pin 3 of the control chip U2 is connected to the pin 1 of the photoelectric coupler U3 through the resistor R16, the pin 2 of the photoelectric coupler U3 is grounded, the pin 4 and pin 6 of the photoelectric coupler U3 are respectively connected to the drive circuit, and the pin 5 of the control chip U2 is connected to the zero-crossing detection circuit.

[0012] The single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit as described above is characterized in that: the driving circuit includes a bidirectional thyristor T1 and a bidirectional thyristor T2, the T2 pole of the bidirectional thyristor T2 is connected to the T2 pole of the bidirectional thyristor T1, the AC filter circuit (2), and the MCU circuit (6) through R2, the T1 pole of the bidirectional thyristor T2 is respectively connected to the negative terminal of the voltage-stabilizing diode ZD4, the rectifier voltage-stabilizing circuit (4), and one end of the resistor R4, the G end of the bidirectional thyristor T2 is respectively connected to the other end of the resistor R4 and one end of the resistor R3, the other end of the resistor R3 is connected to the MCU circuit (6), the T1 pole of the bidirectional thyristor T1 is respectively connected to the AC filter circuit (2), one end of the resistor R21, one end of the capacitor C10, and the rectifier voltage-stabilizing circuit (4), the G pole of the bidirectional thyristor T1 is respectively connected to the other end of the resistor R21, the other end of the capacitor C10, and the negative terminal of the voltage-stabilizing diode ZD3, and the positive terminal of the voltage-stabilizing diode ZD3 is connected to the positive terminal of the voltage-stabilizing diode ZD4.

[0013] The beneficial effects of the utility model are:

[0014] The knob switch level detection circuit of the utility model is connected in series to one of the power input lines. The knob switch which integrates the voltage-dividing speed regulation and the main power switch is used to control the load of the fan controller to change the speed or turn it off, thereby realizing the single-line series connection of the wall controller and reducing the connection of the power line. At the same time, it can be used in combination with the DC FAN controller to adjust a variety of speeds. The knob speed regulation is a low-voltage contact distribution, with small circuit interference and high safety performance. This low-voltage knob-type single-line wall control can be matched with a wide range of products. [Drawings]

[0015] Figure 1 This is the principle diagram of the utility model;

[0016] Figure 2 This is a circuit structure diagram of the utility model. [Specific implementation method]

[0017] The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings.

[0018] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "preferred", "sub-preferred", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "preferred" or "sub-preferred" may explicitly or implicitly include at least one of the features.

[0019] like Figure 1As shown, a single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit includes a power input terminal AC1 and a power input terminal AC2, the power input terminal AC2 is sequentially connected to a load and a knob switch level detection circuit 1 for inputting a knob gear position signal, an AC filter circuit 2 for filtering AC power is connected between the power input terminal AC1 and the knob switch level detection circuit 1, and the AC filter circuit 2 is sequentially connected to an initial power-on circuit 3 for first power-on, a rectifier and voltage stabilization circuit 4 for rectifying and stabilizing the input power supply, and a rectifier and voltage stabilization circuit for detecting the rectifier and voltage stabilization circuit. 4 zero-crossing signal, the knob switch level detection circuit 1 is connected to an MCU circuit 6 connected to the zero-crossing detection circuit 5 for receiving the knob gear signal and the zero-crossing signal and outputting the corresponding gear control signal, the MCU circuit 6 is connected to a driving circuit 7 respectively connected to the knob switch level detection circuit 1, the AC filter circuit 2, and the rectifier voltage stabilizing circuit 4 to drive the load to work according to the gear control signal and make the AC filter circuit 2 supply power to the rectifier voltage stabilizing circuit 4, and the rectifier voltage stabilizing circuit 4 supplies power to the knob switch level detection circuit 1 and the MCU circuit 6 respectively. Among them, the load is a DC FAN main controller or a fan light main controller, etc.; the knob gear signal input by the knob switch level detection circuit 1 includes a zero gear signal for controlling the switch and a plurality of gear signals for controlling different speeds or powers.

[0020] In actual use, when the knob switch of the knob switch level detection circuit 1 is turned on for the first time, the AC power enters the AC filter circuit 2 after passing through the serially connected DC FAN main controller, firstly takes weak power through the initial power-on circuit 3 and transmits it to the rectifier and voltage regulator circuit 4, and then powers the MCU circuit 6 after being processed by the rectifier and voltage regulator circuit 4. At this time, the MCU circuit 6 is powered on and works, but the bidirectional thyristor T1 and the bidirectional thyristor T2 in the drive circuit 7 are not turned on; when the knob switch is rotated, the voltage of each contact on the knob switch is segmented, and the level signal is transmitted to the MCU circuit 6 at this time. The MCU circuit 6 controls the photoelectric coupler U3 in the MCU circuit 6 to work according to the received level signal and the zero crossing point detected by the zero crossing detection circuit 5, controls the bidirectional thyristor T2 in the drive circuit 7 to be partially turned on, and controls the bidirectional thyristor T1 to be partially turned on through the bidirectional thyristor T2. At this time, the AC filter circuit 2 supplies power to the drive circuit 7, and the drive circuit 7 divides the turned-on AC power into two parts: a low-voltage part of AC power and a high-voltage part of AC power. Among them, the low-voltage part of the AC power that is controlled to be turned on is continuously powered by the MCU circuit 6 after the rectifier and filter circuit 4. At this time, since the bidirectional thyristor T2 is turned on, the initial power-on circuit 3 has no power output; and the high-voltage part of the AC power that is controlled to be turned on and the high-voltage signal output by the MCU circuit 6 are supplied to the DC FAN main controller to work, and the transmitted high-voltage signal is given to the DC FAN main controller, which controls the DC FAN main controller to operate at various speeds, realizing the single-line input and single-line output with a knob switch to control the voltage division speed regulation and switching function.

[0021] like Figure 2 As shown, the knob switch level detection circuit 1 includes a knob switch SW1, the knob switch SW1 pin COM is connected to the MCU circuit 6, the knob switch SW1 pin P1 is connected to the AC filter circuit 2, the knob switch SW1 pin P2 is connected to one end of the load, the knob switch SW1 pin 2 is connected to the rectifier and voltage regulator circuit 4 through a resistor R14, the knob switch SW1 pin 3 is connected to the rectifier and voltage regulator circuit 4 through a resistor R13, the knob switch SW1 pin 4 is connected to the rectifier and voltage regulator circuit 4 through a resistor R12, the knob switch SW1 pin 5 is connected to the rectifier and voltage regulator circuit 4 through a resistor R11, the knob switch SW1 pin 6 is connected to the rectifier and voltage regulator circuit 4 through a resistor R10, the knob switch SW1 pin 7 is connected to the rectifier and voltage regulator circuit 4 through a resistor R9, the knob switch SW1 pin 8 is connected to the rectifier and voltage regulator circuit 4 through a resistor R8, and the knob switch SW1 pin 9 is connected to the rectifier and voltage regulator circuit 4 through a resistor R7. In actual use, when the knob switch SW1 pin P1 is connected to the knob switch SW1 pin COM, the knob switch SW1 pin P1 is disconnected from the knob switch SW1 pin P2; when the knob switch SW1 pin COM is connected to any of the knob switch SW1 pins 2-9, the knob switch SW1 pin P1 is connected to the knob switch SW1 pin P2. At the same time, each contact on the knob switch SW1 sends different gear level signals to the MCU circuit 6 through voltage segmentation, thereby realizing the gear speed regulation and switch function.

[0022] like Figure 2 As shown, the AC filter circuit 2 includes a capacitor CX1, one end of the capacitor CX1 is respectively connected to the knob switch level detection circuit 1, the initial power-on circuit 3, and the drive circuit 7, the other end of the capacitor CX1 is respectively connected to one end of the inductor L6 and the drive circuit 7, and the other end of the inductor L6 is connected to the input end AC1 through the fuse FUSE1. In actual use, the capacitor CX1 and the inductor L6 filter the input AC power to filter the interference signal.

[0023] like Figure 2 As shown, the initial power-on circuit 3 includes a diode D1, the positive terminal of the diode D1 is connected to the AC filter circuit 2 through the resistor R1, and the negative terminal of the diode D1 is connected to the rectifier and voltage regulator circuit 4. When the power is first turned on, the power is directly taken through the AC filter circuit 2 and transmitted to the rectifier and voltage regulator circuit 4 to supply power to the MCU circuit 6 for the first time; when the drive circuit 7 is turned on, the initial power-on circuit 3 does not output power to the rectifier and voltage regulator circuit 4.

[0024] like Figure 2As shown, the rectifier and voltage stabilizing circuit 4 includes a rectifier bridge DB1, wherein pin 1 of the rectifier bridge DB1 is respectively connected to the zero-crossing detection circuit 5 and the positive terminal of the diode D2, pin 2 of the rectifier bridge DB1 is connected to the drive circuit 7, pin 3 of the rectifier bridge DB1 is grounded, pin 4 of the rectifier bridge DB1 is connected to the AC filter circuit 2, and the negative terminal of the diode D2 is respectively connected to the initial power-on circuit 3, the positive terminal of the electrolytic capacitor EC1, the negative terminal of the voltage stabilizing diode ZD6, one end of the capacitor C4, and pin 2 of the voltage stabilizing chip U1, pin 3 of the voltage stabilizing chip U1 is respectively connected to the positive terminal of the electrolytic capacitor EC3 and one end of the capacitor C7, the negative terminal of the electrolytic capacitor EC1, the positive terminal of the voltage stabilizing diode ZD6, the other end of the capacitor C4, pin 1 of the voltage stabilizing chip U1, the negative terminal of the electrolytic capacitor EC3, and the other end of the capacitor C7 are respectively grounded, and pin 3 of the voltage stabilizing chip U1 outputs a 5V power supply to supply power to the knob switch level detection circuit 1 and the MCU circuit 6 respectively. When the power is first turned on, the power input from the initial power-on circuit 3 is stepped down to a 5V power supply through the voltage regulator chip U1, and the MCU circuit 6 is powered for the first time; when the drive circuit 7 is turned on, the low-voltage part of the AC power that is controlled to be turned on is converted into DC power through the rectifier bridge DB1, and stepped down to a 5V power supply through the voltage regulator chip U1, and the MCU circuit 6 is continuously powered.

[0025] like Figure 2 As shown, the zero-crossing detection circuit 5 includes a diode D3, the positive terminal of the diode D3 is connected to the rectifier and voltage-stabilizing circuit 4, the negative terminal of the diode D3 is connected to the MCU circuit 6, the negative terminal of the voltage-stabilizing diode ZD1, and one end of the capacitor C1 through a resistor R17, and the positive terminal of the voltage-stabilizing diode ZD1 and the other end of the capacitor C1 are grounded respectively. It is used to detect the zero-crossing point of the power supply and send it to the MCU circuit 4, so that the MCU circuit 4 sends a control signal to the drive circuit 7 according to the level signal output by the knob switch SW1 and the zero-crossing signal.

[0026] like Figure 2 As shown, the MCU circuit 6 includes a control chip U2, the pin 1 of the control chip U2 is respectively connected to the rectifying and voltage stabilizing circuit 4, one end of the resistor R5, and one end of the capacitor C3, the other end of the resistor R5, the other end of the capacitor C3, and the pin 8 of the control chip U2 are respectively grounded, the pin 2 of the control chip U2 is respectively connected to one end of the capacitor C16 and one end of the resistor R6, the other end of the resistor R6 is respectively connected to the knob switch level detection circuit 1 and one end of the resistor 21, the other end of the capacitor C16 and the other end of the resistor R21 are respectively grounded, the pin 3 of the control chip U2 is connected to the pin 1 of the photoelectric coupler U3 through the resistor R16, the pin 2 of the photoelectric coupler U3 is grounded, the pin 4 and pin 5 of the photoelectric coupler U3 are respectively connected to the drive circuit 7, and the pin 5 of the control chip U2 is connected to the zero-crossing detection circuit 5. After receiving the level signal output by the knob switch SW1 and the zero-crossing signal detected by the zero-crossing detection circuit 5, the photoelectric coupler U3 is controlled according to the level signal and the zero-crossing part to send a control signal to the drive circuit 7 to control the drive circuit 7 to work.

[0027] like Figure 2 As shown, the driving circuit 7 includes a bidirectional thyristor T1 and a bidirectional thyristor T2. The T2 pole of the bidirectional thyristor T2 is connected to the T2 pole of the bidirectional thyristor T1, the AC filter circuit (2), and the MCU circuit (6) through R2. The T1 pole of the bidirectional thyristor T2 is respectively connected to the negative terminal of the voltage regulator diode ZD4, the rectifier voltage regulator circuit (4), and one end of the resistor R4. The G end of the bidirectional thyristor T2 is respectively connected to the other end of the resistor R4 and one end of the resistor R3. The other end of the resistor R3 is connected to the MCU circuit (6). The T1 pole of the bidirectional thyristor T1 is respectively connected to the AC filter circuit (2), one end of the resistor R21, one end of the capacitor C10, and the rectifier voltage regulator circuit (4). The G pole of the bidirectional thyristor T1 is respectively connected to the other end of the resistor R21, the other end of the capacitor C10, and the negative terminal of the voltage regulator diode ZD3. The positive terminal of the voltage regulator diode ZD3 is connected to the positive terminal of the voltage regulator diode ZD4.

[0028] When the MCU circuit 6 sends a control signal to the G terminal of the bidirectional thyristor T2 through the photocoupler U3, the bidirectional thyristor T2 is turned on, and the bidirectional thyristor T1 is turned on. At the same time as the bidirectional thyristor T2 is turned on, the low-voltage part of the AC power output by the AC filter circuit 2 is transmitted to the rectifier and voltage regulator circuit 4, and the MCU circuit 6 is continuously powered; the bidirectional thyristor T1 is turned on, so that the high-voltage part of the AC power output by the AC filter circuit 2 and the control chip U2 of the MCU circuit 6 are sent to the DC FAN main controller through the photocoupler U3, and the DC FAN main controller is controlled to operate at various speeds. Among them, the distinction point between high and low voltage electricity of the drive circuit 7 is determined by the parameter values ​​of the voltage regulator tubes ZD3 and ZD4 connected to the G pole of the bidirectional thyristor T1.

[0029] This case can be used in conjunction with the DC FAN main controller, and can adjust a variety of speeds. It does not need to be limited by the previous capacitor step-down speed distribution method, and the knob speed adjustment is a low-voltage contact distribution, with small circuit interference and high safety performance. This method can be extended to match the host light to dim or adjust the light level or color. This low-voltage knob-type single-line wall control can be matched with a wide range of products, depending on the merchant's selling points for different combinations.

[0030] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit, characterized in that: The invention comprises a power input terminal AC1 and a power input terminal AC2, wherein the power input terminal AC2 is connected in sequence to a load and a knob switch level detection circuit (1) for inputting a knob gear position signal, an AC filter circuit (2) for filtering AC power is connected between the power input terminal AC1 and the knob switch level detection circuit (1), the AC filter circuit (2) is connected in sequence to an initial power-on circuit (3) for first power-on, a rectifier and voltage regulator circuit (4) for rectifying and stabilizing the input power supply, and a zero-crossing detection circuit (5) for detecting a zero-crossing signal of the rectifier and voltage regulator circuit (4), and the knob The switch level detection circuit (1) is connected to an MCU circuit (6) connected to a zero-crossing detection circuit (5) for receiving a knob gear position signal and a zero-crossing signal and outputting a corresponding gear position control signal. The MCU circuit (6) is connected to a drive circuit (7) respectively connected to the knob switch level detection circuit (1), the AC filter circuit (2) and the rectifier voltage stabilization circuit (4) for driving a load to work according to the gear position control signal and enabling the AC filter circuit (2) to supply power to the rectifier voltage stabilization circuit (4). The rectifier voltage stabilization circuit (4) supplies power to the knob switch level detection circuit (1) and the MCU circuit (6).

2. A single-wire wall control knob voltage division speed regulation and switch circuit according to claim 1, characterized in that: The rotary switch level detection circuit (1) comprises a rotary switch SW1, wherein a pin COM of the rotary switch SW1 is connected to an MCU circuit (6), a pin P1 of the rotary switch SW1 is connected to an AC filter circuit (2), a pin P2 of the rotary switch SW1 is connected to one end of a load, a pin 2 of the rotary switch SW1 is connected to a rectifier and voltage regulator circuit (4) via a resistor R14, a pin 3 of the rotary switch SW1 is connected to a rectifier and voltage regulator circuit (4) via a resistor R13, a pin 4 of the rotary switch SW1 is connected to a rectifier and voltage regulator circuit (4) via a resistor R12, a pin 5 of the rotary switch SW1 is connected to a rectifier and voltage regulator circuit (4) via a resistor R11, a pin 6 of the rotary switch SW1 is connected to a rectifier and voltage regulator circuit (4) via a resistor R10, a pin 7 of the rotary switch SW1 is connected to a rectifier and voltage regulator circuit (4) via a resistor R9, a pin 8 of the rotary switch SW1 is connected to a rectifier and voltage regulator circuit (4) via a resistor R8, and a pin 9 of the rotary switch SW1 is connected to a rectifier and voltage regulator circuit (4) via a resistor R7.

3. A single-wire wall control knob voltage division speed regulation and switch circuit according to claim 1, characterized in that: The AC filter circuit (2) comprises a capacitor CX1, one end of the capacitor CX1 is respectively connected to the knob switch level detection circuit (1), the initial power-on circuit (3) and the drive circuit (7), the other end of the capacitor CX1 is respectively connected to one end of the inductor L6 and the drive circuit (7), and the other end of the inductor L6 is connected to the input end AC1 via a fuse FUSE1.

4. A single-wire wall control knob voltage division speed regulation and switch circuit according to claim 1, characterized in that: The initial power-on circuit (3) comprises a diode D1, the positive terminal of the diode D1 is connected to the AC filter circuit (2) via a resistor R1, and the negative terminal of the diode D1 is connected to the rectifying and voltage-stabilizing circuit (4).

5. A single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit according to claim 1, characterized in that: The rectifier and voltage stabilizing circuit (4) comprises a rectifier bridge DB1, wherein the pin 1 of the rectifier bridge DB1 is respectively connected to the zero-crossing detection circuit (5) and the positive end of the diode D2, the pin 2 of the rectifier bridge DB1 is connected to the drive circuit (7), the pin 3 of the rectifier bridge DB1 is grounded, the pin 4 of the rectifier bridge DB1 is connected to the AC filter circuit (2), the negative end of the diode D2 is respectively connected to the initial power-on circuit (3), the positive end of the electrolytic capacitor EC1, the negative end of the voltage stabilizing diode ZD6, one end of the capacitor C4, and the pin 2 of the voltage stabilizing chip U1, the pin 3 of the voltage stabilizing chip U1 is respectively connected to the positive end of the electrolytic capacitor EC3 and one end of the capacitor C7, the negative end of the electrolytic capacitor EC1, the positive end of the voltage stabilizing diode ZD6, the other end of the capacitor C4, the pin 1 of the voltage stabilizing chip U1, the negative end of the electrolytic capacitor EC3, and the other end of the capacitor C7 are respectively grounded, and the pin 3 of the voltage stabilizing chip U1 outputs a 5V power supply to supply power to the knob switch level detection circuit (1) and the MCU circuit (6).

6. A single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit according to claim 1, characterized in that: The zero-crossing detection circuit (5) comprises a diode D3, wherein the positive terminal of the diode D3 is connected to the rectifying and voltage-stabilizing circuit (4), the negative terminal of the diode D3 is respectively connected to the MCU circuit (6), the negative terminal of the voltage-stabilizing diode ZD1, and one end of the capacitor C1 through a resistor R17, and the positive terminal of the voltage-stabilizing diode ZD1 and the other end of the capacitor C1 are respectively grounded.

7. A single-wire wall control knob voltage division speed regulation and switch circuit according to claim 1, characterized in that: The MCU circuit (6) comprises a control chip U2, wherein a pin 1 of the control chip U2 is respectively connected to a rectifying and voltage stabilizing circuit (4), one end of a resistor R5, and one end of a capacitor C3, the other end of the resistor R5, the other end of the capacitor C3, and a pin 8 of the control chip U2 are respectively grounded, a pin 2 of the control chip U2 is respectively connected to one end of a capacitor C16 and one end of a resistor R6, the other end of the resistor R6 is respectively connected to a knob switch level detection circuit (1) and one end of a resistor 21, the other end of the capacitor C16 and the other end of the resistor R21 are respectively grounded, a pin 3 of the control chip U2 is connected to a pin 1 of a photoelectric coupler U3 via a resistor R16, a pin 2 of the photoelectric coupler U3 is grounded, pins 4 and 6 of the photoelectric coupler U3 are respectively connected to a drive circuit (7), and a pin 5 of the control chip U2 is connected to a zero-crossing detection circuit (5).

8. A single-wire wall-controlled knob voltage-dividing speed regulation and switch circuit according to claim 1, characterized in that: The driving circuit (7) comprises a bidirectional thyristor T1 and a bidirectional thyristor T2. The T2 pole of the bidirectional thyristor T2 is connected to the T2 pole of the bidirectional thyristor T1, the AC filter circuit (2) and the MCU circuit (6) through R2. The T1 pole of the bidirectional thyristor T2 is respectively connected to the negative terminal of the voltage-stabilizing diode ZD4, the rectifying voltage-stabilizing circuit (4) and one end of the resistor R4. The G end of the bidirectional thyristor T2 is respectively connected to the other end of the resistor R4 and one end of the resistor R3. The other end of the resistor R3 is connected to the MCU circuit (6). The T1 pole of the bidirectional thyristor T1 is respectively connected to the AC filter circuit (2), one end of the resistor R21, one end of the capacitor C10 and the rectifying voltage-stabilizing circuit (4). The G pole of the bidirectional thyristor T1 is respectively connected to the other end of the resistor R21, the other end of the capacitor C10 and the negative terminal of the voltage-stabilizing diode ZD3. The positive terminal of the voltage-stabilizing diode ZD3 is connected to the positive terminal of the voltage-stabilizing diode ZD4.

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