A hairdryer

Abstract

The utility model discloses a hair dryer, be equipped with the accessory detection module of detectable accessory on the hair dryer main part, install the main control board in the hair dryer main part, be equipped with MCU controller on the main control board, MCU controller electricity is connected heating wire power control circuit, motor drive circuit, accessory signal detection circuit, LED pilot lamp control circuit, power supply circuit. When the accessory detection module detection result is "no accessory" or "non -matching accessory", sends out first electric signal control hair dryer's each function module and enters the conventional mode, when the detection result is "has accessory" and is "matching accessory", sends out second electric signal control hair dryer's each function module and enters the AI styling mode, and the AI button SW1 specially equipped for this is awakened under the AI styling mode, and through the operation AI button SW1, the AI hairstyle styling function is started and completed intelligently, reduces even can exempt the operation of user, has promoted for experience.

Description

Technical Field

[0001] This utility model relates to the technology of hair care products, and in particular to a hair dryer. Background Technology

[0002] With the improvement of people's living standards, hair dryers have become an essential part of modern life. Hair dryers are typically composed of a heating element and an impeller, and they can be used not only to dry hair but also to style it. When drying hair, users can use the diffuser attachment; when styling, different nozzle attachments are usually needed, along with appropriate airflow speeds and temperatures. For example, when curling hair, users might use the comb attachment to curl the hair a few times, then use hot air, and finally use cool air to set the style.

[0003] Currently, there is a wide variety of hair dryer accessories. Because products are not yet standardized, different manufacturers design their accessories according to their own standards. This results in hair dryer accessories purchased directly from the market being difficult to fit onto the main body of the hair dryer. Even if physical compatibility is achieved, the corresponding functions cannot be activated due to software incompatibility.

[0004] In addition, existing hair dryers lack AI intelligent control technology. Traditional hair dryers retain manual control functions, requiring users to adjust the temperature and / or airflow separately when switching between different nozzles to suit different needs. When users are unfamiliar with or unskilled at using hair dryers, they may select the wrong airflow or temperature setting, resulting in ineffective operation. To master the adjustment of temperature and airflow for each nozzle, users need to experiment repeatedly or receive instruction, leading to a poor user experience. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a hair dryer that intelligently activates and completes the AI ​​hair styling function when the corresponding hair dryer accessories are detected to be assembled on the main body of the hair dryer. In addition, an AI button is introduced, which realizes AI intelligent control technology through operation of the AI ​​button, reducing or even eliminating the user's operation, improving the user experience, and thus overcoming the shortcomings of the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hair dryer includes a main body, on which an accessory detection module for detecting accessories is provided, and a main control board is installed inside the main body; the main control board is provided with an MCU controller, and the MCU controller is electrically connected to a heating wire power control circuit, a motor drive circuit, an accessory signal detection circuit, an LED indicator control circuit, and a power supply circuit.

[0008] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, the hair dryer of this utility model can not only realize the conventional mode, but also realize the AI ​​styling mode. In the AI ​​styling mode, by controlling the AI ​​button, the hair dryer automatically executes the blowing rule of blowing hot air first and then using cold air to set the shape after blowing, which reduces the user's participation and can be used without professional operation, resulting in a better user experience.

[0009] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a hair dryer according to an embodiment of the present utility model.

[0011] Figure 2 This is a flow chart of a blower shaping method according to an embodiment of the present invention. Figure 1 .

[0012] Figure 3 This is a flowchart of the first intelligent shaping scheme according to an embodiment of the present utility model.

[0013] Figure 4 This is a flowchart of the second intelligent shaping scheme according to an embodiment of the present utility model.

[0014] Figure 5 This is a schematic diagram of the circuit structure of a hair dryer according to an embodiment of the present invention.

[0015] Figure 6 This is a schematic diagram of an MCU controller for a hair dryer according to an embodiment of the present invention.

[0016] Figure 7 This is a schematic diagram of the heating wire power control circuit of a hair dryer according to an embodiment of the present invention.

[0017] Figure 8 This is a schematic diagram of a motor drive circuit for a hair dryer according to an embodiment of the present invention.

[0018] Figure 9 This is a schematic diagram of a signal detection circuit for a hairdryer accessory according to an embodiment of the present invention.

[0019] Figure 10 This is a schematic diagram of an LED indicator control circuit for a hair dryer according to an embodiment of the present invention.

[0020] Figure 11 This is a schematic diagram of the power supply circuit of a hair dryer according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached diagram:

[0022] 1. Hair dryer body 2. Accessories

[0023] 10. Main control board 11. MCU controller

[0024] 12. Heating wire power control circuit 13. Motor drive circuit

[0025] 14. Accessory signal detection circuit; 15. LED indicator control circuit

[0026] 16. Power Supply Circuit 161. AC Input Circuit

[0027] 162. First step-down circuit 163. Rectifier circuit

[0028] 164. Second step-down circuit 165. Third step-down circuit

[0029] 17. Hair thickness recognition module 18. Hair dryness / moisture recognition module

[0030] 19. Hair quality identification module. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] Please refer to Figure 1 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, which is a hair dryer. The hair dryer has a hair dryer body 1, a handle, and accessories 2. The handle has operation buttons. There are many types of accessories 2. When different brands, models, and functions are used, the shape and size of accessories 2 are different. Matching accessories 2 can be quickly disassembled and fitted to the hair dryer body.

[0037] like Figure 2 As shown, based on the above-mentioned hair dryer, this utility model provides a method for shaping hair with a hair dryer, including the following steps:

[0038] S101, the accessory 2 connected to the blower body 1 is detected by the accessory detection module set on the blower body 1, and the accessory detection module sends the accessory detection signal to the MCU controller 11 of the main control board 10 of the blower body 1;

[0039] S102, the MCU controller 11 of the main control board 10 analyzes and judges the accessory detection signal. When the MCU controller 11 judges that the detection signal is "no accessory" or "non-matching accessory", it sends a first electrical signal to control the various functional modules of the blower to enter the normal mode. When the MCU controller 11 judges that the detection signal is "accessory available" and "matching accessory", it sends a second electrical signal to control the various functional modules of the blower to enter the AI ​​styling mode. In the AI ​​styling mode, the corresponding functional modules of the blower execute the blowing rule of blowing hot air first and then using cold air to set the shape after blowing.

[0040] This invention's method, through step S101, can screen accessories 2 of different brands, models, and functions. When the model does not match, the accessory cannot be assembled into the hair dryer body 1, and the MCU controller 11 determines the detection signal as "no accessory". When accessories of different brands are assembled into the hair dryer body 1, even if assembly is completed, the safety of use cannot be guaranteed due to differences in usage between different brands. In this case, the MCU controller 11 determines the detection signal as "accessory present" but "non-matching accessory". Only when an approved accessory 2 of a completely matching brand, model, and function is assembled into the hair dryer body 1, the MCU controller 11 determines the detection signal as "accessory present" and "matching accessory", at which point the hair dryer's AI styling function is triggered, entering the AI ​​styling mode.

[0041] The conventional mode of this utility model refers to the manual blowing mode, such as manually adjusting the speed control button to select the first, second, and third speed settings, and manually adjusting the heat control button to select between cool and hot air. The AI ​​styling mode of this utility model is a more intelligent styling mode than the conventional mode, and will be described in detail below.

[0042] The main body 1 of this utility model of a hair dryer is equipped with an AI button specifically for realizing the AI ​​styling mode. The AI ​​button is unavailable in the normal mode. In the AI ​​styling mode, the AI ​​button is activated and can be used. At this time, the AI ​​button enters various intelligent styling schemes under different operations. After the hairstyle is styling, the AI ​​styling mode can be exited by removing the accessory 2 or operating the AI ​​button, and the AI ​​styling mode can also be exited by turning off the hair dryer.

[0043] The AI ​​button of this utility model can be designed as a multi-functional button, and various shaping methods can be formulated based on its operation, including:

[0044] like Figure 3 As shown, the first intelligent shaping scheme is the intelligent mode: In standby mode, when the AI ​​button is not pressed, the hair dryer is in standby mode, the motor does not run and does not blow air; the heating element does not work and does not heat; only the indicator light on the hair dryer is lit, indicating that the AI ​​function has been activated and can be used. When the user presses the AI ​​button, it enters the automatic cycle intelligent mode. In this mode, the motor automatically turns on at a certain speed, the heating element heats up, and then stops completely after working for a period of time; after stopping for a period of time, the motor turns on again at a certain speed, the heating element heats up and runs, and so on until the AI ​​button is pressed again to stop, or the hair dryer is turned off or accessory 2 is removed.

[0045] like Figure 4As shown, the second intelligent styling solution is a semi-automatic mode, activated by a long press. In this mode, the duration of hot air blowing is determined by the length of time the AI ​​button is pressed. The operation steps are as follows: Press and hold the AI ​​button. During the period the AI ​​button is held, the motor starts at a certain speed, the heating wire heats up, and when the AI ​​button is released, the heating wire stops, while the motor continues to rotate, switching to blowing cool air to style the hair. This continues until the user presses and holds the AI ​​button again, at which point the motor and heating wire start blowing hot air again, and when the AI ​​button is released, the heating wire stops, switching back to blowing cool air. In this operating mode, the user can control the duration of hot air blowing according to their actual needs.

[0046] The third intelligent styling solution is preset styling modes. There are multiple preset styling modes, accessible via short, intermittent presses or consecutive short presses of the AI ​​button. When selected via short presses, different preset styling modes are triggered based on the number of short presses. The operation steps are as follows: Short press the AI ​​button; each press switches from one preset styling mode to another. When selected via consecutive short presses, different preset styling modes are triggered based on the number of consecutive short presses. The operation steps are as follows: Double-clicking, triple-clicking, or quadruple-clicking the AI ​​button respectively enters a different preset styling mode.

[0047] Based on the third intelligent shaping scheme described above, this utility model designs a preset shaping mode that considers at least three shaping parameters, including blowing time, blowing temperature, and blowing speed. The blowing time can be categorized as standard shaping time, extended shaping time, or shortened shaping time. The blowing temperature can be categorized as low-temperature hot air, medium-temperature hot air, or high-temperature hot air. The blowing speed can be categorized as high-speed, medium-speed, or low-speed. This allows for multiple combinations of preset shaping modes in this utility model, as shown in the table below.

[0048]

[0049] Based on the table above, for example, you can combine any three parameters of a preset styling mode: standard styling time + medium-temperature hot air + low-speed airflow. You can also combine another set of parameters: increased styling time + high-temperature hot air + high-speed airflow.

[0050] To facilitate understanding of the definitions of standard styling time, increased styling time, and decreased styling time, this utility model provides the following comparative formulas for the three: Under standard styling time: Hot air blowing time X1 seconds, after the hot air is blown out, the electrical signal of the AI ​​button is cut off, and then the cold air blowing time is Y1 seconds. Under increased styling time: Hot air blowing time X1+N seconds, after the hot air is blown out, the electrical signal of the AI ​​button is cut off, and then the cold air blowing time is Y1+M seconds. Under decreased styling time: Hot air blowing time X1-A seconds, after the hot air is blown out, the electrical signal of the AI ​​button is cut off, and then the cold air blowing time is Y1-B seconds. In the above, X1, Y1, N, M, A, and B are all constants and all greater than zero.

[0051] To facilitate understanding, this utility model provides a specific embodiment. In the preset styling mode, under the standard styling duration: the hot air blow-drying time is 5 seconds. After the hot air is blown out, the electrical signal of the AI ​​button is cut off, and then the cold air blow-drying time is 4 seconds. Under the extended styling duration: the hot air blow-drying time is 5 + 2 seconds, i.e., 7 seconds. After the hot air is blown out, the electrical signal of the AI ​​button is cut off, and then the cold air blow-drying time is 4 + 2 seconds, i.e., 6 seconds. Under the shortened styling duration: the hot air blow-drying time is 5 - 1 second, i.e., 4 seconds. After the hot air is blown out, the electrical signal of the AI ​​button is cut off, and then the cold air blow-drying time is 4 - 1 second, i.e., 3 seconds.

[0052] Similarly, in addition to the design duration, the preset styling mode of this utility model also includes a temperature parameter. The standard styling duration, increased styling duration, and shortened styling duration correspond to three different hot air temperatures: low-temperature hot air, medium-temperature hot air, and high-temperature hot air. Furthermore, in addition to the design duration, the preset styling mode of this utility model also includes a wind speed parameter. The standard styling duration, increased styling duration, and shortened styling duration correspond to three different airflow intensities: high-speed, medium-speed, and low-speed.

[0053] The selection of the blow-drying mode in this invention also takes into account at least one of the following factors: hair thickness, hair dryness, and hair type.

[0054] A hair dryer styling method includes a hair thickness recognition module 17, which detects the diameter of the hair and sends the hair thickness signal to the MCU controller 11 of the main control board 10 of the hair dryer body 1. The MCU controller 11 of the main control board 10 analyzes and judges the hair thickness signal and classifies the hair thickness into at least three types: thick, medium, and thin. In AI styling mode, the standard styling time is executed for medium hair, the hot air blowing time is extended for thick hair, and the hot air blowing time is shortened for thin hair.

[0055] In one embodiment, a hair moisture recognition module 18 may be included. The hair moisture recognition module 18 detects the moisture of the hair and sends the hair moisture signal to the MCU controller 11 of the main control board 10 of the hair dryer body 1. The MCU controller 11 of the main control board 10 analyzes and judges the hair moisture signal and classifies the hair moisture into at least three types: wet, medium, and dry. In AI styling mode, the standard styling time is executed for medium hair, the hot air blowing time is extended for wet hair, and the hot air blowing time is shortened for dry hair.

[0056] In one embodiment, a hair quality identification module 19 may be included. The hair quality identification module 19 detects the hair quality and sends the hair quality signal to the MCU controller 11 of the main control board 10 of the hair dryer body 1. The MCU controller 11 of the main control board 10 analyzes and judges the hair quality signal and classifies the hair quality into at least three types: dry, normal, and oily. In AI styling mode, the standard styling time is executed for normal hair, the hot air blowing time is extended for dry hair, and the hot air blowing time is shortened or other preset styling modes are selected for oily hair.

[0057] Based on the hair dryer shaping method of this utility model, a hair dryer with the following circuit structure is also provided. Figures 5 to 11 As shown. See also Figure 5 The device includes a blower body, on which a component detection module for detecting components 2 is provided. A main control board 10 is installed inside the blower body. An MCU controller 11 is provided on the main control board. The MCU controller 11 is electrically connected to a heating wire power control circuit 12, a motor drive circuit 13, a component signal detection circuit 14, an LED indicator control circuit 15, and a power supply circuit 16.

[0058] The power supply circuit 16 provides power to the main control board 10 and also supplies power to the various electrical loads of the hair dryer. The accessory signal detection circuit 14 detects whether accessories are installed on the hair dryer body and whether compatible accessories are installed. When an accessory 2 is detected, a signal is sent to the MCU controller 11. When the MCU controller 11 receives the signal of accessory 2, it triggers the AI ​​styling function and can start the AI ​​styling mode. In the AI ​​styling mode, the MCU controller 11 automatically selects or drives the heating wire power control circuit 12 and the motor drive circuit 13 under the user's operation to achieve the hairstyle. In different styling modes, the LED indicator control circuit 15 lights up different LEDs for the user to identify.

[0059] In addition, the MCU controller 11 of this utility model is electrically connected to at least one of the following: hair thickness recognition module 17, hair dryness recognition module 18, and hair quality recognition module 19.

[0060] The hair thickness recognition module 17 detects the diameter of the hair and sends the hair thickness signal to the MCU controller 11 of the main control board 10 of the blow dryer body 1. The MCU controller 11 of the main control board 10 analyzes and judges the hair thickness signal and classifies the hair thickness into at least three types: thick, medium, and thin. In AI styling mode, the standard styling time is executed for medium hair, the hot air blowing time is extended for thick hair, and the hot air blowing time is shortened for thin hair.

[0061] The hair moisture recognition module 18 detects the hair moisture and sends the hair moisture signal to the MCU controller 11 of the main control board 10 of the hair dryer body 1. The MCU controller 11 of the main control board 10 analyzes and judges the hair moisture signal and classifies the hair moisture into at least three types: wet, medium, and dry. In AI styling mode, the standard styling time is executed for medium hair, the hot air blowing time is extended for wet hair, and the hot air blowing time is shortened for dry hair.

[0062] The hair quality identification module 19 detects the hair quality and sends the hair quality signal to the MCU controller 11 of the main control board 10 of the hair dryer body 1. The MCU controller 11 of the main control board 10 analyzes and judges the hair quality signal and classifies the hair quality into at least three types: dry, normal, and oily. In AI styling mode, the standard styling time is executed for normal hair, the hot air blowing time is extended for dry hair, and the hot air blowing time is shortened for oily hair.

[0063] Please refer to Figure 6 As shown, the MCU controller 11 has a storage unit, which contains the functional program code of the hair dryer in both normal mode and AI styling mode, enabling all functions of the hair dryer styling method. The MCU controller 11 is a chip U5 with 39 pins.

[0064] Pins 28 to 38 of the MCU controller 11 are connected to the motor drive circuit 13. Pins LO_U, LO_V, and LO_W correspond one-to-one with the signal control terminals LO_U, LO_V, and LO_W of the motor drive circuit 13; pins HO_U, HO_V, and HO_W correspond one-to-one with the signal control terminals HO_U, HO_V, and HO_W of the motor drive circuit 13; and pins U, V, and W correspond one-to-one with the terminal connectors J6, J8, and J9 of the motor drive circuit 13.

[0065] The 26th pin of the MCU controller 11 is the SW1 control terminal, which is connected to the accessory signal detection circuit 14. When the SW1 control terminal is energized, the hair dryer can enter the AI ​​styling mode.

[0066] Pins 22 and 23 of the MCU controller 11 are the heating wire control terminals HEAT1 and HEAT1, which are connected to the heating wire power control circuit 12 and are used to control the heating power of the heating wire.

[0067] Please refer to Figure 7 As shown, the heating wire power control circuit 12 includes a control terminal AC-N connected to the MCU controller 11, an AC power input terminal ACL-L, a controllable switch T5, an optocoupler U6, a current-limiting resistor R69, and a current-limiting resistor R68. The AC power input terminal ACL-L is connected to the fuse H1 and then to the optocoupler U6. The secondary circuit of the optocoupler U6 is connected to the heating wire. The control terminal AC-N is electrically connected to the controllable switch T5. Under the control of the control terminal AC-N, the controllable switch T5 cooperates with the various components to realize the switching on and off of the secondary circuit. When the secondary circuit is on, the heating wire heats up.

[0068] Please refer to Figure 8 As shown, the motor drive circuit 13 realizes multiple speed control of the motor. Six MOSFETs are switched at different times to achieve the three phase voltages U, V, and W. This enables the motor to rotate 360° in both directions. By changing the duty cycle of the drive voltage of the six MOSFETs, the magnitude of the induced current in the motor is controlled, thus controlling the motor speed.

[0069] The motor drive circuit 13 is used to control the forward and reverse rotation of the DC motor. It includes a power supply section, power transistors, diodes, resistors, capacitors, and control signals. The power supply terminal HV of the power supply section is a high-voltage power supply, providing the drive voltage for the circuit. The ground wire GND is the common reference point for the circuit.

[0070] The power transistors, Q1 through Q6, are all power MOSFETs used to control the direction of current in the motor. Q1 and Q2 form one group, Q3 and Q4 form a second group, and Q5 and Q6 form a third group, controlling the forward and reverse rotation of the motor, respectively. Taking Q1 and Q2 as an example, when Q1 is turned on, current flows from HV to the motor, causing the motor to rotate forward. When Q2 is turned on, current flows from the motor to GND, causing the motor to rotate in reverse.

[0071] The diodes, including Q4 to Q11, are all freewheeling diodes (also known as trailing diodes), used to provide a current loop when the motor is powered off, preventing damage to the circuit from the motor's back electromotive force. Taking D4 and D6 as examples, D4 is connected in parallel with Q1, so when Q1 is off, the motor current can continue to flow through D4. D6 is connected in parallel with Q2, so when Q2 is off, the motor current can continue to flow through D6.

[0072] The resistors include R14 and R16; R18 and R20; R33 and R34; R36 and R37; R42 and R45; R48 and R50; these resistors are used to limit the current of the drive signal and protect the gate of the MOSFET.

[0073] The resistors also include R17 and R21, R35 and R38, R46 and R51, which are used to bias the gate of the MOSFET to ensure that the MOSFET is off when there is no input signal.

[0074] The resistors also include R25 and R26: these resistors are used for current limiting and to protect other components in the circuit.

[0075] The capacitors include C15 and C18: these capacitors are used for filtering, smoothing the power supply voltage, and reducing the impact of power supply noise on the circuit.

[0076] The control signals include signals LO_U, LO_V, LO_W; signals HO_U, HO_V, HO_W; and signals U, V, W, which are used to control the on and off states of Q1 to Q6 each time.

[0077] Taking the first group of power management circuits as an example, the first group of output power management circuits includes a high-voltage power input terminal HV; power MOSFETs Q1 and Q2; diodes D4 and D6; resistors R14, R16, R18, and R20; capacitors C15 and C18; and control signal terminals HO_U and LO_U electrically connected to the MCU controller 11. The high-voltage power input terminal HV is used to connect to the power circuit 16 and then electrically connects to the power MOSFETs Q1 and Q2. The power MOSFETs Q1 and Q2 control the forward and reverse rotation of the motor, respectively. Diode D4 is connected in parallel with the power MOSFET Q1, and diode D6 is connected in parallel with the power MOSFET Q2. Diode D4 is connected in series with resistor R16. R14 is connected to the gate of power MOSFET Q1. When power MOSFET Q1 is off, the motor current can continue to flow through diode D4. When power MOSFET Q2 is off, the motor current can continue to flow through diode D6. The switching of power MOSFETs Q1 and Q2 is controlled by the control signals HO_U and LO_U. The control signal HO_U controls the conduction of Q1, causing the motor to rotate forward, and the control signal LO_U controls the conduction of Q2, causing the motor to rotate in reverse.

[0078] The operating principle is as follows: Forward rotation: When HO_U is high, Q1 conducts, current flows from HV to the motor, and the motor rotates forward. Reverse rotation: When LO_U is high, Q2 conducts, current flows from the motor to GND, and the motor rotates in reverse. Stop: When both HO_U and LO_U are low, both Q1 and Q2 are off, and the motor stops. This circuit controls the forward and reverse rotation of the DC motor by controlling the conduction and cutoff of Q1 and Q2. The freewheeling diode protects the circuit from the reverse electromotive force of the motor, while the resistor and capacitor are used for current limiting and filtering to ensure the stability and reliability of the circuit.

[0079] Please refer to Figure 9 As shown, the accessory signal detection circuit 14 includes a Hall effect sensor U3 and a decoupling capacitor C1, as well as an AI button SW1 for entering AI styling mode and a current-limiting resistor R14. The power supply circuit 16 inputs a 5-volt voltage to the power supply pin VDD. When accessory 2 is correctly installed, the Hall effect sensor U3 detects a change in the magnetic field and outputs it to the MCU controller 11 through the circuit's output pin VOUT. The control signal terminal SW of the MCU controller 11 triggers the AI ​​button SW1 to be in an usable state. By operating the AI ​​button SW1, the hair dryer can enter various intelligent styling schemes.

[0080] The accessory signal detection circuit 14 is used to detect whether accessory 2 of the hair dryer is installed correctly. It includes a power supply, capacitor, Hall effect sensor, resistor, and AI button.

[0081] The 5Vbus power supply is the circuit's power input, providing 5 volts. Capacitor C1 is a decoupling capacitor used to smooth the power supply voltage, reduce the impact of power supply noise on the circuit, and ensure stable circuit operation. The Hall effect sensor Hall_SW is a Hall effect sensor used to detect changes in the magnetic field. When the magnetic field changes, the Hall effect sensor changes its output state. In this circuit, it is used to detect the installation status of the hair dryer accessory 2. Resistor R14 is a current-limiting resistor used to limit the current flowing through the AI ​​button SW1, protecting the AI ​​button and the circuit.

[0082] The AI ​​button SW1 is a multi-functional switch used for manual control of the circuit's on / off state. Working in conjunction with the AI ​​chip U1, it enables various intelligent styling functions for the hair dryer. When the AI ​​button SW1 is closed, the AI ​​chip U1 circuit is connected; when the AI ​​button SW1 is open, the AI ​​chip U1 is disconnected.

[0083] The output section includes VDD, VOUT, and GND, which are the circuit's output pins. VDD is the circuit's power supply pin, connected to the power source. VOUT is the circuit's output pin, outputting the detection result. When the Hall effect sensor detects a change in the magnetic field, the VOUT pin outputs a corresponding signal. GND is the circuit's ground pin, connected to ground.

[0084] The working principle is as follows: The circuit is powered by a 5V bus, and capacitor C1 smooths the power supply voltage. The Hall effect sensor Hall_SW detects changes in the magnetic field. When the hair dryer accessory 2 is correctly installed, the Hall effect sensor will detect the change in the magnetic field. When the Hall effect sensor detects the change in the magnetic field, the VOUT pin will output a corresponding signal, indicating that accessory 2 has been correctly installed. Then, it enters the AI ​​button SW1 intelligent styling mode.

[0085] Please refer to Figure 10 As shown, the LED indicator control circuit 15 includes transistors Q1, Q2, and Q3, multiple sets of tri-color LEDs D1 to D10, and signal control terminals LED1, LED2, and LED3. Each signal control terminal is connected to the MCU controller 11. Each transistor Q1, Q2, and Q3 corresponds to the corresponding color LED chip in each set of tri-color LEDs. When transistors Q1, Q2, and Q3 are turned on, the corresponding color LED lights up; when transistors Q1, Q2, and Q3 are turned off, the corresponding color LED turns off.

[0086] The LED indicator control circuit 15 displays different operating states of the hair dryer by controlling different LEDs. The following is a detailed explanation of the various electronic components and their functions in this circuit:

[0087] Power Supply Section: 5Vbus is the circuit's power input, providing 5 volts. D1-D10 are tri-color LED indicator lights, used to display different operating states of the hair dryer. Each LED is driven by an independent control circuit. Resistors R1, R2, and R30 are connected to D1: these are current-limiting resistors, used to limit the current flowing through the LEDs and protect them from damage by excessive current. Each tri-color indicator light (D1-D10) is equipped with three current-limiting resistors; their circuit connection and principle are the same as D1, and will not be repeated here. Capacitors C9-C12 are decoupling capacitors, used to smooth the power supply voltage, reduce the impact of power supply noise on the circuit, and ensure stable circuit operation. Transistors Q1-Q3 are NPN transistors used to control the switching of the LEDs. When the transistors are turned on, the LEDs are lit; when the transistors are turned off, the LEDs are off.

[0088] The working principle is as follows: The circuit is powered by a 5V bus, and capacitors C9-C12 smooth the power supply voltage. Transistors Q1-Q3 control the LEDs' on / off state based on the high or low level of the input signal. When the input signal is high, the transistors conduct, and the LEDs light up. When the input signal is low, the transistors are cut off, and the LEDs turn off. Display status: By controlling different LEDs, different operating states of the hair dryer can be displayed, such as heating, blowing, and cold air. This circuit uses transistors to control the LEDs' on / off state, indicating different operating states of the hair dryer. Current-limiting resistors protect the LEDs, and decoupling capacitors ensure circuit stability. By controlling different LEDs, the operating status of the hair dryer can be displayed intuitively, allowing users to easily understand the hair dryer's operation.

[0089] Please refer to Figure 11 As shown, the power supply circuit 16 includes an AC input circuit 161, a first step-down circuit 162, a rectifier circuit 163, a second step-down circuit 164, and a third step-down circuit 165. The AC input circuit 161 is electrically connected to the first step-down circuit 162 and the rectifier circuit 163 in sequence to obtain a DC voltage HV from the AC power AC_L and AC_N. The DC voltage HV is stepped down and regulated by the second step-down circuit 164 to obtain a 12V voltage. The 12V voltage is then stepped down by the third step-down circuit 165 to obtain a 5V voltage.

[0090] More specifically, the power input terminals AC_L and AC_N are connected to the AC power supply. A fuse is connected in series in the AC_L circuit for overcurrent protection, preventing damage to the circuit due to overload. A common-mode inductor X2 is connected in parallel to the power input terminals AC_L and AC_N to suppress electromagnetic interference (EMI) and reduce noise on the power lines. Capacitors CX1 and CX2 are connected between the power lines and ground to further suppress EMI.

[0091] A bridge rectifier is formed between AC1 and AC2 and between DC- and DC+, converting alternating current into pulsating direct current. Inductor L1 and capacitor together form an LC filter to smooth the pulsating direct current after rectification. Electrolytic capacitor CX2 further smooths the direct current and reduces voltage fluctuations.

[0092] The switching power supply chip U2 is responsible for controlling the switching frequency and duty cycle to achieve efficient voltage conversion. It receives feedback signals from the output voltage, divides the voltage through R2 and R4, and adjusts the on-time of the internal switches according to the feedback to maintain a stable output voltage.

[0093] Inductor L2 and diodes D1 and D2 constitute a buck converter. Inductor L2 stores energy, while D1 and D2 rectify the high-voltage input to a stable low-voltage output. Capacitors C4, C7, and C22 filter and smooth the output voltage, reducing voltage fluctuations. Resistors R2, R4, and R7 set the feedback voltage to ensure output voltage stability. Test points T2 and T3 measure the output voltage and current for easy debugging and testing. Capacitor C8 decouples the power supply, reducing the impact of power supply noise on the circuit. Overall, the main function of the switching power supply chip U2 and its peripheral circuitry is to convert high-voltage power to a stable 12V output, suitable for electronic devices requiring a stable low-voltage power supply.

[0094] The third step-down circuit 165 includes a step-down chip U1, which further reduces the voltage output from the switching power supply to provide a stable 5V output. Capacitors C5 and C6 provide output filtering to ensure the stability of the 5V output voltage.

[0095] This power supply circuit 16 converts AC power into a stable DC power output through rectification, filtering, switching power supply conversion, and voltage regulation. The circuit uses various electronic components, such as fuses, common-mode inductors, rectifier bridges, inductors, capacitors, switching power supply ICs, Schottky diodes, and linear regulators, to achieve the power supply's functions of voltage reduction, regulation, and AC-to-DC conversion.

[0096] In summary, the hair dryer of this utility model can not only achieve the conventional mode, but also the AI ​​styling mode. In the AI ​​styling mode, the hair dryer automatically executes the blowing rule of blowing hot air first and then using cold air to set the style. On the one hand, it reduces the user's involvement and can be used without professional operation, resulting in a better user experience. Both modes are provided by multiple styling and setting modes written in the MCU controller 11 for users to choose from, achieving a more perfect styling and setting according to different hair types.

[0097] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A hair dryer, comprising a main body, wherein the main body is provided with a component detection module for detecting components, characterized in that: The main body of the hair dryer is equipped with a main control board (10); the main control board is equipped with an MCU controller (11), which is electrically connected to the heating wire power control circuit (12), the motor drive circuit (13), the accessory signal detection circuit (14), the LED indicator control circuit (15), and the power supply circuit (16); the accessory signal detection circuit (14) has an AI button SW1.

2. A hair dryer according to claim 1, characterized in that: The MCU controller (11) is connected to the storage unit.

3. A hair dryer according to claim 1, characterized in that: The heating wire power control circuit (12) includes a control terminal AC-N connected to the MCU controller (11), an AC power input terminal ACL-L, a controllable switch T5, an optocoupler U6, a current-limiting resistor R69, and a current-limiting resistor R68; the AC power input terminal ACL-L is connected to the fuse H1 and then to the optocoupler U6, and the secondary circuit of the optocoupler U6 is connected to the heating wire; the control terminal AC-N is electrically connected to the controllable switch T5.

4. A hair dryer according to claim 1, characterized in that: The motor drive circuit (13) includes a power supply section, a power transistor, a diode, a resistor, a capacitor, and a control signal connected by a circuit.

5. A hair dryer according to claim 1, characterized in that: The accessory signal detection circuit (14) includes a Hall effect sensor U3 and a decoupling capacitor C1, as well as an AI button SW1 for entering AI modeling mode and a current limiting resistor R14. The power supply circuit (16) inputs a 5-volt voltage to the power supply pin VDD. The Hall effect sensor U3 outputs to the MCU controller through the circuit's output pin VOUT. The control terminal SW of the MCU controller (11) is connected to the AI ​​button SW1.

6. A hair dryer according to claim 1, characterized in that: The LED indicator control circuit (15) includes transistors Q1, Q2, Q3, and multiple sets of tri-color LEDs D1 to D10; signal control terminals LED1, LED2, and LED3, each connected to the MCU controller (11). Each transistor Q1, Q2, and Q3 is equivalent to the corresponding color LED chip of each set of tri-color LEDs. When transistors Q1, Q2, and Q3 are turned on, the corresponding color LED lights up; when transistors Q1, Q2, and Q3 are turned off, the corresponding color LED lights off.

7. A hair dryer according to claim 1, characterized in that: The power supply circuit (16) includes an AC input circuit (161), a first step-down circuit (162), a rectifier circuit (163), a second step-down circuit (164), and a third step-down circuit (165). The AC input circuit (161) is connected to the first step-down circuit (162) and the rectifier circuit (163) in sequence to obtain a DC voltage HV from the AC power AC_L and AC_N. The DC voltage HV is stepped down and regulated by the second step-down circuit (164) to obtain a 12V voltage. The 12V voltage is then stepped down by the third step-down circuit (165) to obtain a 5V voltage.

8. A hair dryer according to claim 7, characterized in that: The power input terminals AC_L and AC_N are connected to the AC power supply. The fuse is connected in series in the AC_L circuit. The common mode inductor X2 is connected in parallel to the power input terminals AC_L and AC_N. The capacitors CX1 and CX2 are connected between the power line and ground. The bridge rectifier is formed between AC1 and AC2 and between DC- and DC+.

9. A hair dryer according to claim 1, characterized in that: In the second step-down circuit (164), the inductor L2 and diodes D1 and D2 form a step-down converter; the third step-down circuit (165) includes a step-down chip U1 and filter capacitors C5 and C6.

10. A hair dryer according to claim 1, characterized in that: The MCU controller (11) is electrically connected to at least one of the following: hair thickness recognition module (17), hair dryness recognition module (18), and hair quality recognition module (19).

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