A compatible voltage circuit for a high speed hair dryer

Abstract

The utility model discloses a compatible voltage circuit of high -speed blow -dryer, including: power input rectifier module, high voltage energy storage voltage stabilizing module, DC DC conversion module, signal processing control module, interface auxiliary module, power input rectifier module is connected with high voltage energy storage voltage stabilizing module, signal processing control module, high voltage energy storage voltage stabilizing module is connected with signal processing control module, interface auxiliary module, DC DC conversion module is connected with signal processing control module, interface auxiliary module, the present application can be self -adapted voltage multiplication switching through single piece PCB board compatible 110V and 220V, and the kind of material and cost are reduced, realize voltage real -time detection and surge protection, improve security, still can through power closed loop control heating wire power, and unified program debugging interface, shorten development cycle, simplify later period maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of voltage circuit technology and relates to a compatible voltage circuit for a high-speed hair dryer. Background Technology

[0002] Existing high-speed hair dryer products require separate 110V and 220V versions, which presents several problems: First, the PCB boards for different voltage versions are not interchangeable, resulting in a wide variety of materials and high production costs; second, the PCB boards can only operate under their corresponding voltages, leading to poor voltage compatibility; and third, different voltage versions require separate program debugging, resulting in long development cycles and complicated subsequent maintenance. Although some manufacturers on the market design universal voltage motors to match compatible scenarios, the overall approach still relies on version-specific designs. Therefore, a circuit solution is needed that enables a single PCB board to be compatible with both voltages, adaptively switches voltage multipliers, simplifies debugging and maintenance, and improves safety, in order to solve the problems of high cost, poor compatibility, and complex development and maintenance in existing technologies. Summary of the Invention

[0003] To address the problems existing in the background technology, this utility model proposes a compatible voltage circuit for a high-speed hair dryer.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a compatible voltage circuit for a high-speed hair dryer, comprising: an AC input module, a bridge rectifier and voltage doubler rectifier module, a rectified voltage and bus voltage detection module, an MCU, and a heating wire;

[0005] The AC input module is connected to the bridge rectifier and voltage doubler rectifier module and the heating wire, respectively; the bridge rectifier and voltage doubler rectifier module is connected to the MCU, the rectified voltage and bus voltage detection module; the rectified voltage and bus voltage detection module is connected to the MCU through the ADC; the MCU is connected to the heating wire.

[0006] The bridge rectifier and voltage doubler rectifier module also includes a DC-DC conversion module;

[0007] The DC-DC conversion module is connected to the signal processing control module and the interface auxiliary module.

[0008] The power input rectifier module includes: power input interface H1, live wire L, neutral wire N, rectifier bridge DB1, bidirectional thyristor BT1, resistor R21, and resistor R22;

[0009] The live wire L is connected to the second AC pin of the rectifier bridge DB1. The neutral wire N is connected to the third AC pin of the rectifier bridge DB1, the first terminal of the bidirectional thyristor BT1, and the resistor R21. The V- pin of the rectifier bridge DB1 is connected to ground. The power input interface H1 is connected to one end of the resistor R22 and the second terminal of the bidirectional thyristor BT1. The other end of the resistor R22 is connected to the third terminal of the bidirectional thyristor BT1.

[0010] The high-voltage energy storage and voltage regulation module includes: resistor R52, bidirectional thyristor BT3, capacitor C11, capacitor EC1, capacitor EC2, diode D1, resistor R50, resistor R51, capacitor C0, resistor R57, resistor R58, resistor R59, resistor R60, capacitor C15, and capacitor C10.

[0011] One end of resistor R52 is connected to the neutral line N and the first terminal of the triac BT3. The other end of resistor R52 is connected to the third terminal of the triac BT3. The second terminal of the triac BT3 is connected to the negative terminal of capacitor EC1, the positive terminal of capacitor EC2, one end of resistor R50, and one end of resistor R51. The V+ pin of rectifier bridge DB1 is connected to the anode of diode D1 and one end of capacitor C11. The cathode of diode D1 is connected to the positive terminal of capacitor EC1, the other end of resistor R50, one end of capacitor C0, and resistor R5... One end of resistor R7 is connected to the other end of capacitor C11, which is connected to one end of capacitor C10, the negative terminal of capacitor EC2, the other end of resistor R51, the other end of capacitor C0, one end of resistor R60, one end of capacitor C15, the V- pin of rectifier bridge DB1, and ground. The other end of capacitor C10 is connected to ground. The other end of resistor R57 is connected to one end of resistor R58. The other end of resistor R58 is connected to the other end of resistor R60 and one end of resistor R59. The other end of resistor R59 is connected to the other end of capacitor C15.

[0012] The signal processing control module includes: microcontroller U3, optocoupler U4, optocoupler U6, resistor R18, resistor R14, capacitor C14, capacitor C13, and resistor R53.

[0013] The first terminal of optocoupler U4 is connected to one end of resistor R18, and the other end of resistor R18 is connected to the +5V input power supply. The second terminal of optocoupler U4 is connected to pin 2 of microcontroller U3. The third terminal of optocoupler U4 is connected to the other end of resistor R21. The fourth terminal of optocoupler U4 is connected to the third terminal of triac BT1. The first terminal of optocoupler U6 is connected to one end of resistor R14, and the other end of resistor R14 is connected to the +5V input power supply. The second terminal of optocoupler U6 is connected to pin 20 of microcontroller U3. The third terminal of optocoupler U6 is connected to the second terminal of triac BT3 via resistor R53. The fourth terminal of optocoupler U4 is connected to the third terminal of triac BT3. One end of capacitor C14 is connected to pin 1 of microcontroller U3. The other end of capacitor C14 is connected to one end of capacitor C13, pin 4 of microcontroller U3, and ground. The other end of capacitor C13 is connected to the input power supply +5V and pin 6 of microcontroller U3. The VDC pin of microcontroller U3 is connected to the common terminal of resistor R59 and capacitor C15.

[0014] The interface auxiliary module includes: connector J4, resistors R1, R2, R3, and R4, capacitors C1 and C2, and SWD interface P1;

[0015] The second pin of connector J4 is connected to the +310V input power supply and one end of resistor R57. One end of resistor R1 is connected to the anode of diode D1, and the other end of resistor R1 is connected to one end of resistor R2. The other end of resistor R2 is connected to one end of resistor R4, one end of resistor R3, and one end of capacitor C2. The other end of resistor R3 is connected to one end of capacitor C1 and the VAC pin of microcontroller U3. The first pin of connector J4 is connected to one end of resistor R4, one end of capacitor C2, one end of capacitor C1, and ground.

[0016] The first pin of the SWD interface P1 is connected to the SWCLK pin of the microcontroller U3, the second pin of the SWD interface P1 is connected to the SWDIO pin of the microcontroller U3, the third pin of the SWD interface P1 is connected to ground, and the fourth pin of the SWD interface P1 is connected to the input power supply +5V.

[0017] The DC-DC conversion module includes: inductor L3, capacitor C5, DC-DC conversion chip U1, capacitor C6, inductor L1, diode ZD1, diode D3, capacitor C4, capacitor E2, diode TVS, resistor R7, three-terminal regulator U2, capacitor E4, and capacitor C7.

[0018] One end of inductor L3 is connected to the +310V input power supply. The other end of inductor L3 is connected to one end of capacitor C5 and the Drain pin of DC-DC converter chip U1. The other end of capacitor C5 is connected to the GND pin and ground of DC-DC converter chip U1. The ICG pin of DC-DC converter chip U1 is connected to one end of capacitor C6 and one end of inductor L1. The other end of inductor L1 is connected to the +15V input power supply, one end of capacitor C4, the positive terminal of diode D3, the positive terminal of capacitor E2, the negative terminal of diode TVS, and one end of resistor R7. Connect the following: the other end of resistor R7 is connected to pin 3 of the three-terminal regulator U2; the VDD pin of the DC-DC converter chip U1 is connected to the other end of capacitor C6 and the positive terminal of diode ZD1; the negative terminal of diode ZD1 is connected to the negative terminal of diode D3; the other end of capacitor C4 is connected to the negative terminal of capacitor E2, the positive terminal of diode TVS, pin 2 of the three-terminal regulator U2, the negative terminal of capacitor E4, one end of capacitor C7, and ground; pin 1 of the three-terminal regulator U2 is connected to the positive terminal of capacitor E4, the other end of capacitor C7, and the input power supply +5V.

[0019] Compared with the prior art, this utility model has the following beneficial effects: The beneficial effects of this invention are as follows: By enabling a single PCB board to be compatible with both 110V and 220V operating voltages and adaptively switching between voltage multipliers, the types of materials for different voltage products are reduced, thus lowering production costs; it solves the compatibility problem of existing PCB boards operating at a single voltage, allowing the same board to be used for different voltage products and wide-voltage products; it unifies the program debugging interface, shortening the development cycle and simplifying later maintenance; it has surge input voltage and bus voltage detection functions, which can quickly cut off the voltage multiplier to prevent overvoltage breakdown, improving circuit safety; by real-time detection of AC voltage and bus voltage, combined with the internal resistance of the heating wire, the heating wire power can be calculated, realizing closed-loop power control, ensuring stable heating wire power, and improving user experience and product stability. Attached Figure Description

[0020] Figure 1 This is a block diagram of a compatible voltage circuit for a high-speed hair dryer according to this utility model;

[0021] Figure 2 This is a block diagram of a compatible voltage circuit for a high-speed hair dryer according to this utility model;

[0022] Figure 3 This is the circuit connection diagram of the power input rectifier module of this utility model;

[0023] Figure 4 This is the circuit connection diagram of the high-voltage energy storage and voltage stabilizing module of this utility model;

[0024] Figure 5 This is a circuit connection diagram of the signal processing control module of this utility model;

[0025] Figure 6 This is the circuit connection diagram of the interface auxiliary module of this utility model;

[0026] Figure 7 This is the circuit connection diagram of the DC-DC conversion module of this utility model;

[0027] Figure 8 This is an overall connection diagram of the compatible voltage circuit for a high-speed hair dryer according to this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-8 As shown, the technical solution adopted by this utility model is as follows: a compatible voltage circuit for a high-speed hair dryer, comprising: an AC input module, a bridge rectifier and voltage doubler rectifier module, a rectified voltage and bus voltage detection module, an MCU, and a heating wire;

[0030] The AC input module is connected to the bridge rectifier and voltage doubler rectifier module and the heating wire, respectively; the bridge rectifier and voltage doubler rectifier module is connected to the MCU, the rectified voltage and bus voltage detection module; the rectified voltage and bus voltage detection module is connected to the MCU through the ADC; the MCU is connected to the heating wire.

[0031] The bridge rectifier and voltage doubler rectifier module also includes a DC-DC conversion module;

[0032] The DC-DC conversion module is connected to the signal processing control module and the interface auxiliary module.

[0033] The power input rectifier module includes: power input interface H1, live wire L, neutral wire N, rectifier bridge DB1, bidirectional thyristor BT1, resistor R21, and resistor R22.

[0034] The live wire L is connected to the second AC pin of the rectifier bridge DB1. The neutral wire N is connected to the third AC pin of the rectifier bridge DB1, the first terminal of the bidirectional thyristor BT1, and the resistor R21. The V- pin of the rectifier bridge DB1 is connected to ground. The power input interface H1 is connected to one end of the resistor R22 and the second terminal of the bidirectional thyristor BT1. The other end of the resistor R22 is connected to the third terminal of the bidirectional thyristor BT1.

[0035] The power input rectifier module is connected to the AC power supply, and the AC power is converted to DC power through the rectifier bridge. The thyristor controls the on and off of the circuit, and the resistor is used for voltage division or protection.

[0036] The live wire L and the neutral wire N are connected to the AC power supply. The bridge rectifier DB1 completes the bridge rectification and outputs DC power of about 1.41 times the input voltage.

[0037] The bidirectional thyristor BT1 is controlled by the microcontroller U3 to turn on or off, thereby realizing power supply on / off control or voltage switching.

[0038] Resistors R21 and R22 are voltage divider resistors that provide the input voltage detection signal VAC to the microcontroller U3, which is used to determine whether the input voltage is 110V or 220V.

[0039] The high-voltage energy storage and voltage regulation module includes: resistor R52, bidirectional thyristor BT3, capacitor C11, capacitor EC1, capacitor EC2, diode D1, resistor R50, resistor R51, capacitor C0, resistor R57, resistor R58, resistor R59, resistor R60, capacitor C15, and capacitor C10.

[0040] One end of resistor R52 is connected to the neutral line N and the first terminal of the triac BT3. The other end of resistor R52 is connected to the third terminal of the triac BT3. The second terminal of the triac BT3 is connected to the negative terminal of capacitor EC1, the positive terminal of capacitor EC2, one end of resistor R50, and one end of resistor R51. The V+ pin of rectifier bridge DB1 is connected to the anode of diode D1 and one end of capacitor C11. The cathode of diode D1 is connected to the positive terminal of capacitor EC1, the other end of resistor R50, one end of capacitor C0, and resistor R5... One end of resistor R7 is connected to the other end of capacitor C11, which is connected to one end of capacitor C10, the negative terminal of capacitor EC2, the other end of resistor R51, the other end of capacitor C0, one end of resistor R60, one end of capacitor C15, the V- pin of rectifier bridge DB1, and ground. The other end of capacitor C10 is connected to ground. The other end of resistor R57 is connected to one end of resistor R58. The other end of resistor R58 is connected to the other end of resistor R60 and one end of resistor R59. The other end of resistor R59 is connected to the other end of capacitor C15.

[0041] The high-voltage energy storage and voltage stabilization module stores the rectified electrical energy, boosts the voltage through a voltage multiplier circuit, and achieves voltage stabilization and surge protection through resistor voltage division and diodes.

[0042] When the input is 220V, capacitors EC1 and EC2 are connected in parallel to store energy, and the output is approximately 310V DC.

[0043] When the input is 110V, the microcontroller U3 controls the bidirectional thyristor BT3 to conduct, and the capacitors EC1 and EC2 are charged alternately through the current direction to form a series voltage multiplier circuit, with an output of approximately 220V × 1.41 ≈ 310V DC, which is consistent with the 220V input.

[0044] Resistors R52, R53, R50, R51, R57, R58, R59, and R60 form a resistor voltage divider network to monitor the bus voltage VDC and input voltage VAC in real time. Feedback is provided through the ADC pin of the microcontroller U3 to achieve overvoltage protection, such as quickly cutting off the voltage multiplier in case of a surge.

[0045] Diode D1 isolates the rectified voltage from the bus voltage to prevent current backflow during voltage multiplication, and works in conjunction with the capacitor to complete the voltage multiplication logic.

[0046] The signal processing control module includes: microcontroller U3, optocoupler U4, optocoupler U6, resistor R18, resistor R14, capacitor C14, capacitor C13, and resistor R53.

[0047] The first terminal of optocoupler U4 is connected to one end of resistor R18, and the other end of resistor R18 is connected to the +5V input power supply. The second terminal of optocoupler U4 is connected to pin 2 of microcontroller U3. The third terminal of optocoupler U4 is connected to the other end of resistor R21. The fourth terminal of optocoupler U4 is connected to the third terminal of triac BT1. The first terminal of optocoupler U6 is connected to one end of resistor R14, and the other end of resistor R14 is connected to the +5V input power supply. The second terminal of optocoupler U6 is connected to pin 20 of microcontroller U3. The third terminal of optocoupler U6 is connected to the second terminal of triac BT3 via resistor R53. The fourth terminal of optocoupler U4 is connected to the third terminal of triac BT3. One end of capacitor C14 is connected to pin 1 of microcontroller U3. The other end of capacitor C14 is connected to one end of capacitor C13, pin 4 of microcontroller U3, and ground. The other end of capacitor C13 is connected to the input power supply +5V and pin 6 of microcontroller U3. The VDC pin of microcontroller U3 is connected to the common terminal of resistor R59 and capacitor C15.

[0048] The signal processing and control module is the core control unit. It uses microcontroller U3 to detect voltage, control voltage multiplication switching, drive actuators, and communicate with external systems.

[0049] The microcontroller U3 detects the input AC voltage through the VAC voltage divider circuit to determine whether to trigger voltage multiplication. 110V requires voltage multiplication, while 220V does not.

[0050] The microcontroller U3 monitors the bus voltage through the VDC voltage divider circuit, calculates the heating wire power in real time, and realizes closed-loop power control.

[0051] The output PWM signal controls optocouplers U4 and U6, which in turn drive bidirectional thyristors BT1 and BT3 to complete voltage doubling switching or power on / off switching.

[0052] Optical couplers U4 and U6 are electrically isolated from the high-voltage circuit via the microcontroller U3 to prevent strong electrical interference and ensure reliable transmission of control signals.

[0053] SWDIO / SWCLK is a debugging interface used for program downloading and debugging, and is compatible with unified debugging for different voltage versions.

[0054] The interface auxiliary module includes: connector J4, resistors R1, R2, R3, and R4, capacitors C1 and C2, and SWD interface P1.

[0055] The second pin of connector J4 is connected to the input terminal of the +310V power supply and one end of resistor R57. One end of resistor R1 is connected to the positive terminal of diode D1. The other end of resistor R1 is connected to one end of resistor R2. The other end of resistor R2 is connected to one end of resistor R4, one end of resistor R3, and one end of capacitor C2. The other end of resistor R3 is connected to one end of capacitor C1 and the VAC pin of microcontroller U3. The first pin of connector J4 is connected to one end of capacitor C15, one end of resistor R4, one end of capacitor C2, one end of capacitor C1, and ground.

[0056] The first pin of the SWD interface P1 is connected to the SWCLK pin of the microcontroller U3, the second pin of the SWD interface P1 is connected to the SWDIO pin of the microcontroller U3, the third pin of the SWD interface P1 is connected to ground, and the fourth pin of the SWD interface P1 is connected to the input power supply +5V.

[0057] The interface auxiliary module provides an external interface to detect voltage signals through voltage divider and enable human-machine interaction.

[0058] Connector J4 connects to loads such as heating wires and outputs a stable 310V DC voltage.

[0059] The SWD interface P1 is a unified debugging interface that supports both 110V and 220V versions of the program, shortening the development cycle.

[0060] The DC-DC conversion module includes: inductor L3, capacitor C5, DC-DC conversion chip U1, capacitor C6, inductor L1, diode ZD1, diode D3, capacitor C4, capacitor E2, diode TVS, resistor R7, three-terminal regulator U2, capacitor E4, and capacitor C7.

[0061] One end of inductor L3 is connected to the +310V input power supply. The other end of inductor L3 is connected to one end of capacitor C5 and the Drain pin of DC-DC converter chip U1. The other end of capacitor C5 is connected to the GND pin and ground of DC-DC converter chip U1. The ICG pin of DC-DC converter chip U1 is connected to one end of capacitor C6 and one end of inductor L1. The other end of inductor L1 is connected to the +15V input power supply, one end of capacitor C4, the positive terminal of diode D3, the positive terminal of capacitor E2, the negative terminal of diode TVS, and one end of resistor R7. Connect the following: the other end of resistor R7 is connected to pin 3 of the three-terminal regulator U2; the VDD pin of the DC-DC converter chip U1 is connected to the other end of capacitor C6 and the positive terminal of diode ZD1; the negative terminal of diode ZD1 is connected to the negative terminal of diode D3; the other end of capacitor C4 is connected to the negative terminal of capacitor E2, the positive terminal of diode TVS, pin 2 of the three-terminal regulator U2, the negative terminal of capacitor E4, one end of capacitor C7, and ground; pin 1 of the three-terminal regulator U2 is connected to the positive terminal of capacitor E4, the other end of capacitor C7, and the input power supply +5V.

[0062] The DC-DC converter module converts high-voltage DC 310V to low-voltage DC +5V, +15V, etc., to power the microcontroller U3 and other components, while also providing overvoltage protection.

[0063] The DC-DC converter chip U1 uses the KP35026VGA chip: a switching power supply controller, which, together with inductor L1, inductor L3, capacitor C5, and capacitor C6, achieves step-down conversion and outputs +15V voltage.

[0064] The three-terminal regulator U2 further regulates the +15V to +5V, providing power to the microcontroller U3 and the optocoupler.

[0065] A TVS diode is a transient voltage suppressor diode that absorbs surge voltage and protects downstream circuits.

[0066] Diode ZD1 is a Zener diode that stabilizes the +15V output voltage, ensuring the safe operation of subsequent components.

[0067] Input voltage detection: After the AC power supply is rectified by the rectifier bridge DB1, the VAC signal is obtained by voltage division through resistors R21 and R22 and input to the ADC pin of the microcontroller U3.

[0068] The microcontroller U3 determines the input voltage based on the VAC value: if the VAC is lower than the threshold, it triggers the voltage doubling mode; if it is higher than the threshold, it directly enters the non-voltage doubling mode.

[0069] Voltage doubling switching logic: 110V input: Microcontroller U3 controls optocoupler U6 to conduct, triggering bidirectional thyristor BT3 to conduct. Capacitors EC1 and EC2 are charged alternately through the rectification direction of diode D1, forming a series circuit, and outputting approximately 310V DC.

[0070] 220V input: The bidirectional thyristor BT3 is cut off, and capacitors EC1 and EC2 are connected in parallel to store energy, directly outputting approximately 310V DC without the need for voltage multiplier.

[0071] Voltage stabilization and protection: The resistor voltage divider network monitors the bus voltage in real time. If a surge overvoltage is detected, the microcontroller U3 immediately cuts off the bidirectional thyristor BT3, stops the voltage multiplication, and disconnects the power supply.

[0072] Diodes TVS and ZD1 provide overvoltage protection on the high-voltage and low-voltage sides, respectively, to ensure circuit safety.

[0073] Power closed-loop control: The microcontroller U3 obtains the AC mains voltage through VAC, and indirectly obtains the voltage across the heating wire. Combined with its internal resistance, it calculates the power in real time, and adjusts the thyristor conduction time through PWM to achieve stable power output.

[0074] This invention enables a single PCB board to support two voltages through a voltage multiplier circuit and microcontroller control, reducing material types and inventory costs. By using a hardware voltage multiplier circuit and software logic, it automatically identifies the input voltage and switches the operating mode accordingly, eliminating the need for users to distinguish between versions and improving product versatility.

[0075] Dual voltage detection and surge protection simultaneously monitors the input voltage VAC and the bus voltage VDC. The surge is quickly cut off by the internal comparator of the microcontroller U3, which is more reliable than the traditional single-channel detection and prevents overvoltage damage to components.

[0076] Power closed-loop control enhances safety by calculating and adjusting the heating wire power in real time to prevent power abnormalities caused by voltage fluctuations, achieving constant temperature control and improving user experience and product stability.

[0077] A unified debugging interface shortens the development cycle. The SWD interface is compatible with debugging different voltage versions of the program, eliminating the need for separate development and reducing debugging time and maintenance costs.

[0078] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A compatible voltage circuit for a high-speed hair dryer, characterized in that, It includes: AC input module, bridge rectifier and voltage doubler rectifier module, rectified voltage and bus voltage detection module, MCU, heating wire; The AC input module is connected to the bridge rectifier and voltage doubler rectifier module and the heating wire, respectively; the bridge rectifier and voltage doubler rectifier module is connected to the MCU and the rectified voltage and bus voltage detection module; the rectified voltage and bus voltage detection module is connected to the MCU through the ADC; The MCU is connected to the heating wire; The power input rectifier module includes: power input interface H1, live wire L, neutral wire N, rectifier bridge DB1, bidirectional thyristor BT1, resistor R21, and resistor R22. The live wire L is connected to the second AC pin of the rectifier bridge DB1, the neutral wire N is connected to the third AC pin of the rectifier bridge DB1, the first terminal of the bidirectional thyristor BT1, and the resistor R21, the V- pin of the rectifier bridge DB1 is connected to ground, the power input interface H1 is connected to one end of the resistor R22 and the second terminal of the bidirectional thyristor BT1, and the other end of the resistor R22 is connected to the third terminal of the bidirectional thyristor BT1. The high-voltage energy storage and voltage regulation module includes: resistor R52, bidirectional thyristor BT3, capacitor C11, capacitor EC1, capacitor EC2, diode D1, resistor R50, resistor R51, capacitor C0, resistor R57, resistor R58, resistor R59, resistor R60, capacitor C15, and capacitor C10. One end of resistor R52 is connected to the neutral line N and the first terminal of the triac BT3. The other end of resistor R52 is connected to the third terminal of the triac BT3. The second terminal of the triac BT3 is connected to the negative terminal of capacitor EC1, the positive terminal of capacitor EC2, one end of resistor R50, and one end of resistor R51. The V+ pin of rectifier bridge DB1 is connected to the anode of diode D1 and one end of capacitor C11. The cathode of diode D1 is connected to the positive terminal of capacitor EC1, the other end of resistor R50, one end of capacitor C0, and resistor R5... One end of 7 is connected to the other end of capacitor C11, which is connected to one end of capacitor C10, the negative terminal of capacitor EC2, the other end of resistor R51, the other end of capacitor C0, one end of resistor R60, one end of capacitor C15, the V- pin of rectifier bridge DB1, and ground. The other end of capacitor C10 is connected to ground. The other end of resistor R57 is connected to one end of resistor R58. The other end of resistor R58 is connected to the other end of resistor R60 and one end of resistor R59. The other end of resistor R59 is connected to the other end of capacitor C15. The signal processing control module includes: microcontroller U3, optocoupler U4, optocoupler U6, resistor R18, resistor R14, capacitor C14, capacitor C13, and resistor R53. The first terminal of optocoupler U4 is connected to one end of resistor R18, and the other end of resistor R18 is connected to the +5V input power supply. The second terminal of optocoupler U4 is connected to pin 2 of microcontroller U3. The third terminal of optocoupler U4 is connected to the other end of resistor R21. The fourth terminal of optocoupler U4 is connected to the third terminal of triac BT1. The first terminal of optocoupler U6 is connected to one end of resistor R14, and the other end of resistor R14 is connected to the +5V input power supply. The second terminal of optocoupler U6 is connected to pin 20 of microcontroller U3. The third terminal of optocoupler U6 is connected to the second terminal of triac BT3 via resistor R53. The fourth terminal of optocoupler U4 is connected to the third terminal of triac BT3. One end of capacitor C14 is connected to pin 1 of microcontroller U3. The other end of capacitor C14 is connected to one end of capacitor C13, pin 4 of microcontroller U3, and ground. The other end of capacitor C13 is connected to the input power supply +5V and pin 6 of microcontroller U3. The VDC pin of microcontroller U3 is connected to the common terminal of resistor R59 and capacitor C15.

2. The compatible voltage circuit for a high-speed hair dryer according to claim 1, characterized in that, The bridge rectifier and voltage doubler rectifier module also includes a DC-DC conversion module; The DC-DC conversion module is connected to the signal processing control module and the interface auxiliary module.

3. The compatible voltage circuit for a high-speed hair dryer according to claim 1, characterized in that, The interface auxiliary module includes: connector J4, resistors R1, R2, R3, and R4, capacitors C1 and C2, and SWD interface P1; The second pin of connector J4 is connected to the +310V input power supply and one end of resistor R57. One end of resistor R1 is connected to the anode of diode D1, and the other end of resistor R1 is connected to one end of resistor R2. The other end of resistor R2 is connected to one end of resistor R4, one end of resistor R3, and one end of capacitor C2. The other end of resistor R3 is connected to one end of capacitor C1 and the VAC pin of microcontroller U3. The first pin of connector J4 is connected to one end of resistor R4, one end of capacitor C2, one end of capacitor C1, and ground. The first pin of the SWD interface P1 is connected to the SWCLK pin of the microcontroller U3, the second pin of the SWD interface P1 is connected to the SWDIO pin of the microcontroller U3, the third pin of the SWD interface P1 is connected to ground, and the fourth pin of the SWD interface P1 is connected to the input power supply +5V.

4. The compatible voltage circuit for a high-speed hair dryer according to claim 2, characterized in that, The DC-DC conversion module includes: inductor L3, capacitor C5, DC-DC conversion chip U1, capacitor C6, inductor L1, diode ZD1, diode D3, capacitor C4, capacitor E2, diode TVS, resistor R7, three-terminal regulator U2, capacitor E4, and capacitor C7. One end of inductor L3 is connected to the +310V input power supply. The other end of inductor L3 is connected to one end of capacitor C5 and the Drain pin of DC-DC converter chip U1. The other end of capacitor C5 is connected to the GND pin and ground of DC-DC converter chip U1. The ICG pin of DC-DC converter chip U1 is connected to one end of capacitor C6 and one end of inductor L1. The other end of inductor L1 is connected to the +15V input power supply, one end of capacitor C4, the positive terminal of diode D3, the positive terminal of capacitor E2, the negative terminal of diode TVS, and one end of resistor R7. Connect the following: the other end of resistor R7 is connected to pin 3 of the three-terminal regulator U2; the VDD pin of the DC-DC converter chip U1 is connected to the other end of capacitor C6 and the positive terminal of diode ZD1; the negative terminal of diode ZD1 is connected to the negative terminal of diode D3; the other end of capacitor C4 is connected to the negative terminal of capacitor E2, the positive terminal of diode TVS, pin 2 of the three-terminal regulator U2, the negative terminal of capacitor E4, one end of capacitor C7, and ground; pin 1 of the three-terminal regulator U2 is connected to the positive terminal of capacitor E4, the other end of capacitor C7, and the input power supply +5V.

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