Intelligent electric hair drier with TOF distance induction and high-speed direct-current brushless motor

Abstract

The utility model provides an intelligent electric hair drier with TOF distance induction and a high-speed direct current brushless motor, which comprises a main control board and the high-speed direct current brushless motor driven by the main control board, the main control board comprises a main control module, a motor control module and an intelligent temperature sensing module, the main control module is provided with a main control unit, and the intelligent temperature sensing module is provided with an intelligent temperature sensing module. The heating load module is used for being connected with a motor control module and controlling the working states of the motor and the heating load module, and the output end of the motor control module is connected with the high-speed direct-current brushless motor; the intelligent electric hair drier further comprises a TOF distance sensing module, the TOF distance sensing module is connected with the main control unit and used for detecting the distance between the intelligent electric hair drier and hair or the surface of an object, the input end of the intelligent temperature sensing module is connected with a temperature sensor, and the output end of the intelligent temperature sensing module is connected with the main control module. According to the utility model, distance detection is more accurate, and temperature and speed control is more intelligent.

Description

Technical Field

[0001] The utility model relates to the technical field of hair dryers, in particular to an intelligent hair dryer with TOF distance sensing and a high-speed DC brushless motor. Background Art

[0002] As a common household appliance, a hair dryer can be used to dry hair, style hair, dry items, etc. It has become one of the essential household appliances. Existing hair dryers are usually set with fixed gears, such as: three gears of medium and high or two gears of high and low. There is no way to adjust the working mode of the hair dryer such as the temperature according to one's own needs. Therefore, the existing hair dryers are not intelligent enough. Utility Model Content

[0003] In order to solve the problems in the prior art, the utility model provides an intelligent hair dryer with TOF distance sensing and a high-speed DC brushless motor, which gets rid of the gear limitations of the existing hair dryer and can set the working mode of the hair dryer according to needs.

[0004] The utility model has a smart hair dryer with TOF distance sensing and a high-speed DC brushless motor, including a power module, a heating load module, a heating drive module for driving the heating load module to heat, a main control module, a motor control module and an intelligent temperature sensing module, wherein:

[0005] The main control module is provided with a main control unit and a Bluetooth communication unit, which are used to connect with the motor control module to control the working state of the motor and the heating load module. The Bluetooth communication unit is used to communicate with the host computer to realize the control of the intelligent hair dryer control board circuit by the host computer;

[0006] The motor control module is provided with an MCU connected to the main control module, and the MCU is used to transmit the motor working status to the main control module;

[0007] The input end of the intelligent temperature sensing module is connected to the temperature sensor, and the output end is connected to the main control module.

[0008] Furthermore, it also includes a distance sensor, and the output end of the distance sensor is connected to the input end of the main control module.

[0009] Furthermore, the distance sensor is a TOF distance sensor.

[0010] Furthermore, it also includes a human-computer interaction module connected to the main control module.

[0011] Furthermore, the human-computer interaction module is an operation area, and the operation area is provided with a first button for controlling light display, a second button for controlling a working mode, and a third button for controlling cold air / hot air.

[0012] Furthermore, it also includes a light display module, which includes a first light display unit and a second light display unit. The first light display unit is provided with a plurality of LED lights, which are respectively connected to the output end of the main control unit. The second light display unit includes a plurality of atmosphere lights and a switch unit for controlling the atmosphere lights. The atmosphere lights are provided with RGB three-color lamp beads. The switch unit includes a first triode, a second switch tube and a third switch tube. The emitters of the first switch tube, the second switch tube and the third switch tube are grounded, and the bases are respectively connected to the R, G, and B control ends of the main control unit. The collector of the first switch tube is respectively connected to the R-color lamp beads of the plurality of atmosphere lights, the collector of the second switch tube is respectively connected to the G-color lamp beads of the plurality of atmosphere lights, and the collector of the third switch tube is respectively connected to the B-color lamp beads of the plurality of atmosphere lights.

[0013] Furthermore, the motor control module includes an MCU, a motor drive unit and an interface CN1. The MCU is connected to a main control unit via the interface CN1. The MCU controls the motor via the motor drive unit and obtains motor information.

[0014] Furthermore, the motor drive unit adopts a BLDC direct current brushless motor drive, and the MCU adopts a sensorless FOC controller.

[0015] Furthermore, the heating load module includes a normally open switch SW1, a fuse TF, a heating wire and a temperature control switch TH which are respectively connected in series between the power module and the heating drive module, wherein the temperature control switch TH is used to automatically disconnect the heating wire heating when the set temperature is exceeded.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The TOF distance sensor is used to accurately measure the distance of an object without being affected by the color, reflectivity and texture of the object. Compared with the existing infrared distance measurement that is easily affected by wireless signal interference and occlusion, the distance measurement result of the utility model is more accurate;

[0018] (2) By setting up an intelligent temperature sensing module, the internal temperature of the hair dryer can be obtained in time. The main control module can adjust the heating power of the heating load module in time according to the internal temperature to achieve intelligent temperature regulation to prevent the internal temperature from rising sharply and scalding the hair;

[0019] (3) By adopting a high-speed brushless DC motor, it has the advantages of high efficiency and easy control. The motor control module sets an MCU and adopts sensorless FOC control for the three-phase high-speed brushless DC motor. Compared with traditional square wave and sine wave control, it has the advantages of high motor efficiency and less vibration and noise.

[0020] (4) The utility model divides the control system into a main control system and a sub-control system with the main control module as the main control module. The main control system is responsible for processing the data of each sensor, responding to key operations, and communicating with the host computer; the sub-control system is responsible for transmitting the working status of each motor to the main control system, processing the heating power received from the main control system, and then controlling the operation of the motor, heating load module, etc., to achieve the control of the conventional functions of the hair dryer. The dual control systems perform their respective duties, which can effectively improve the system processing efficiency, the motor operation efficiency is higher, and the main control module can also expand other applications;

[0021] (5) By setting up a Bluetooth communication unit, the mobile phone or other host computer can control the working mode of the smart hair dryer, and the working mode of the smart hair dryer can be adjusted according to the user's own needs, breaking through the existing working gear limitations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is the structural diagram of the utility model;

[0024] Figure 2 This is a schematic diagram of a power module circuit according to an embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of a heating load module and a heating drive module circuit according to an embodiment of the utility model;

[0026] Figure 4 This is a circuit schematic diagram of a motor control module according to an embodiment of the utility model;

[0027] Figure 5 This is a circuit schematic diagram of the main control module, light display module and human-computer interaction module in one embodiment of the utility model;

[0028] Figure 6 This is the circuit schematic diagram of the TOF distance sensor of the utility model;

[0029] Figure 7 This is the circuit schematic diagram of the intelligent temperature sensing module of the utility model. DETAILED DESCRIPTION

[0030] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0031] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments.

[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0033] like Figure 1 As shown, the utility model has a smart hair dryer with TOF distance sensing and a high-speed DC brushless motor, including a main control board and a high-speed DC brushless motor driven by the main control board, the main control board includes a power module, a heating load module, a heating drive module for driving the heating load module to heat, and also includes a main control module, a motor control module, an intelligent temperature sensing module and a human-computer interaction module, wherein the main control module is provided with a main control unit and a Bluetooth communication unit for connecting to the motor control module to control the working state of the motor and the heating load module, the Bluetooth communication unit is used to communicate with a host computer to realize the control of the circuit of the smart hair dryer control board by the host computer; the motor control module is provided with an MCU connected to the main control module, and the MCU is used to transmit the working state of the motor to the main control module; the input end of the intelligent temperature sensing module is connected to the temperature sensor, and the output end is connected to the main control module, and the human-computer interaction module realizes the operator's operation control of the smart hair dryer.

[0034] like Figure 1 and Figure 6 As shown, the utility model further comprises a TOF distance sensor, and the output end of the distance sensor is connected to the input end of the main control module.

[0035] The distance sensor in this example is preferably a TOF (time of flight) distance sensor, which has a TDC (time to digital conversion) circuit inside. Compared with the existing infrared distance sensor, which is easily affected by wireless signal interference and shielding, the TOF sensor of the utility model can accurately measure the distance of an object without being affected by the color, reflectivity and texture of the object. The MCU communicates with the distance sensor to measure the distance value and returns it to the MCU for processing. Therefore, the present invention can more intelligently adjust the heating power of the hair dryer based on the distance to avoid burns.

[0036] Existing hair dryer controllers usually only have a single-chip microcomputer for controlling the air volume of the hair dryer, etc., and have a single function. If you want to expand more functions or control a high-efficiency motor fan, you need to replace it with a control chip with more powerful computing power, which invisibly increases the cost of the product.

[0037] The utility model preferably divides the control system into a main control system and a sub-control system with the main control module as the main control module. The main control system is responsible for processing the data of each sensor, responding to key operations, and communicating with the host computer; the sub-control system is responsible for transmitting the working status of each motor to the main control system, processing the heating power received from the main control system, and then controlling the operation of the motor, heating load module, etc., to achieve the control of the conventional functions of the hair dryer. The dual control systems each perform their respective duties, which can effectively improve the system processing efficiency, the motor operation efficiency is higher, and the main control module can also expand other applications.

[0038] By setting up a Bluetooth communication unit, the upper computer such as a mobile phone can control the working mode of the smart hair dryer, and the working mode of the smart hair dryer can be adjusted according to the user's own needs, breaking through the existing working gear restrictions. For example, when blowing wet hair and semi-drying, different powers and temperatures can be used; when drying ordinary clothes or temperature-sensitive clothes, adaptive adjustments can also be made. Therefore, the application range of the utility model is wider.

[0039] By setting up an intelligent temperature sensing module, the internal temperature of the hair dryer can be obtained in time. The main control module can adjust the heating power of the heating load module in time according to the internal temperature to achieve intelligent temperature regulation to prevent the internal temperature from rising sharply and scalding the hair.

[0040] like Figure 2 As shown, the power module of this example adopts a switching power supply, which converts the AC input power into a DC output through a rectifier DB1, and converts it into different voltages through a voltage conversion module, and outputs it to a heating load module, a heating drive module, a main control module, etc. for use.

[0041] like Figure 3The heating load module of this example includes a normally open switch SW1, a fuse TF, a heating wire and a temperature control switch TH respectively connected in series between the power module and the heating drive module, wherein the normally open switch SW1 is used to control whether the entire heating load module is running, the load of this example includes two parallel heating wires Ra and Rb, the fuse TF realizes overcurrent protection, and the temperature control switch TH is used to automatically disconnect the heating wire heating when the set temperature is exceeded, and automatically close the load heating path when the temperature drops below the set temperature value, thereby realizing automatic over-temperature protection of the hair dryer. The heating drive module of this example is connected to the MCU of the motor control module and controlled by the bidirectional thyristor TR1.

[0042] like Figure 4 As shown, the motor control module of this example includes an MCU, a motor drive unit connected to the MCU respectively, a current acquisition unit, an analog-to-digital conversion unit and an interface CN1. The MCU is connected to the main control unit through the interface CN1. The MCU controls the motor through the motor drive unit and obtains motor information.

[0043] Preferably, the motor drive unit is driven by a BLDC brushless DC motor. The motor in this example is a three-phase high-speed brushless DC motor, and the MCU is a sensorless FOC controller. The three-phase high-speed brushless DC motor is controlled by a sensorless FOC. For sensorless FOC, it is necessary to collect the motor phase current and use the position estimation algorithm to calculate the rotor position during control, which will increase the control difficulty of the sensorless FOC, but can avoid the risk of sensor failure. FOC is a motor control technology, the full name of which is Field Oriented Control, also known as vector control. It is a variable frequency drive control method for controlling a three-phase brushless DC motor by controlling the amplitude and frequency of the output voltage of the drive control board. Its essence is to use coordinate transformation to convert the motor phase current in the three-phase stationary coordinate system to a rotating coordinate system that is stationary relative to the rotor magnetic pole axis, and to achieve the purpose of controlling the motor by controlling the vector size and direction in the rotating coordinate system. Compared with traditional square wave and sine wave control, FOC control has the advantages of high motor efficiency, less vibration and noise.

[0044] The motor drive unit adopts a BLDC brushless DC motor drive chip U4, the MCU adopts a sensorless FOC controller, a temperature sensor is provided inside the BLDC brushless DC motor drive, and pin 11 of the BLDC brushless DC motor drive chip U4 is connected to pin 16 of the MCU through a temperature acquisition unit. The temperature acquisition unit in this example includes a capacitor C20, a resistor R36, a resistor R66 and a capacitor C13, wherein the capacitor C12 and the resistor R36 are connected in series between pin 11 of the BLDC brushless DC motor drive chip U4 and pin 16 of the MCU, one end of the capacitor C13 and the resistor R66 are respectively connected to the two ends of the resistor R36, the other end of the capacitor C13 is grounded, and the other end of the resistor R66 is connected to a power supply.

[0045] By integrating a temperature sensor and a temperature acquisition unit, over-temperature protection of the power device of the drive motor of the utility model is realized. When the high-speed DC brushless motor (hereinafter referred to as the motor) of the utility model is running, the temperature of the power device rises, and the internal temperature sensor of the BLDC DC brushless motor drive chip U4 transmits the temperature to the MCU chip U5 through the temperature acquisition unit. The MCU chip U5 detects that the temperature is too high and enters over-temperature protection. The motor and the heating wire stop working to avoid burning components and the motor.

[0046] The analog-to-digital conversion unit in this example is used for MCU to collect voltage information, including resistors R8, R21, and R27 connected in series in sequence, one end of the series resistor string is grounded, and the other end is connected to a power supply, and also includes a resistor R26 and a capacitor C14, wherein the resistor R26 is connected between the resistor R21 and the resistor R27, the other end of the resistor R26 is respectively connected to one end of the capacitor C14 and pin 1 of the MCU, and the other end of the capacitor C14 is grounded.

[0047] Overvoltage protection and undervoltage protection are achieved through the analog-to-digital conversion unit. The MCU chip U5 samples the input voltage in real time. If the voltage is too high, it enters the overvoltage protection mode, and the motor and heating wire stop working to avoid damage to components caused by high voltage. If the voltage is too low, it enters the undervoltage protection mode, and the motor and heating wire stop working to avoid damage to components caused by increased motor running current at low voltage, and to avoid unstable system operation caused by insufficient power supply due to low voltage.

[0048] The current acquisition unit in this example includes a sampling resistor connected to the motor drive unit and a current operational amplifier unit connected to the output end of the sampling resistor, the output end of the current operational amplifier unit is connected to the input end of the MCU, wherein the current operational amplifier unit includes branches respectively having the same three-phase structure, each branch including a first resistor and a second resistor connected in series on two acquisition lines, and a first capacitor with both ends connected in parallel on the two acquisition lines.

[0049] In this example, overcurrent protection, startup protection, stall protection and phase loss protection are implemented through the current acquisition unit. Specifically, the MCU chip U5 detects the motor working current in real time through the current sampling resistor (R38, R39, R54) and the current operational amplifier unit. If it is detected that the motor working current is too large, the overcurrent protection is activated, and the motor and the heating wire stop working to avoid burning components and the motor; if it is detected that the working current is abnormal when the motor starts, the startup protection is activated, and the motor and the heating wire stop working to avoid burning components and the motor; the motor working current is detected in real time. If it is detected that the motor working current is large and the speed is low, the stall protection is activated, and the motor and the heating wire stop working to avoid burning components and the motor; the motor working current is detected in real time. If it is detected that the current of any phase of the three-phase current of the motor is very small, the phase loss protection is activated, and the motor and the heating wire stop working to avoid burning components and the motor.

[0050] In addition, the MCU chip U5 in this example can also obtain the input voltage and total motor current through the collected current and voltage data, and then calculate the motor operating power. If the power is too large, it will enter the power limitation process to avoid burning the motor.

[0051] like Figure 5 As shown, the main control module of this example adopts a control chip U7 with Bluetooth communication function, which is connected to the interface CN1 of the motor control module through the interface CN9 to achieve communication connection with the MCU.

[0052] As an embodiment of the utility model, this example can be used as a lighting device or an atmosphere light. The human-computer interaction module of this example is an operation area. The operation area of ​​this example is provided with a first button for controlling the light display, a second button for controlling the working mode, and a third button for controlling the cold air / hot air. Of course, the operation area of ​​this example can also be set in the form of a touch screen or the like.

[0053] This example is provided with a light display module, which includes a first light display unit and a second light display unit. The first light display unit is provided with five LED lights, namely LED1-LED5, and the five LED lights are respectively connected to the output end of the main control unit. The second light display unit includes four atmosphere lights and a switch unit for controlling the atmosphere lights. The four atmosphere lights are LED lights with RGB three-color lamp beads, namely LED8-LED11. The switch unit includes a first triode, a second switch tube and a third switch tube. The emitters of the first switch tube, the second switch tube and the third switch tube are grounded, and the bases are respectively connected to the R, G, and B control ends of the main control unit. The collector of the first switch tube is respectively connected to the R color lamp beads of several atmosphere lights, the collector of the second switch tube is respectively connected to the G color lamp beads of several atmosphere lights, and the collector of the third switch tube is respectively connected to the B color lamp beads of several atmosphere lights.

[0054] The light display in this example can be a lighting mode, which turns on LED1-LED5 and controls them separately through the five input and output interfaces of the control chip U7 to achieve five levels of brightness adjustment. If it is an atmosphere light mode, this example can achieve different lighting effects by controlling the different lighting methods of LED8-LED11.

[0055] Of course, the number of LED lights in this example can be set according to demand, this example can also be expanded to other applications, and the human-computer interaction module in this example can also be set to a touch screen, a display screen, etc.

[0056] like Figure 7 As shown, the intelligent temperature sensing module of this example uses a temperature sensor to detect the temperature inside the hair dryer and transmit it to the main control chip U7. Of course, in this example, a second temperature sensor can also be set in the main control module or in the motor control module to test the external ambient temperature and evaluate the heating effect of the load through the internal and external temperature difference.

[0057] In this example, when the hair dryer works in the distance sensing mode, the MCU measures the distance value through the distance sensor in real time, and then automatically adjusts the power according to the distance; for example: the MCU controls the heating power to gradually increase according to the distance value from near to far, so that people can experience that the temperature of the hair dryer is not much different at different distances from the hair, and feel the soft and comfortable warm wind. If the hair dryer approaches the hair from a distance, in order to avoid scalding the hair, the MCU controls the heating power to gradually decrease until it becomes cold wind after the set close distance. Due to real-time measurement, the power change is also completed within ms level time, which is more intelligent.

[0058] As can be seen from the above, the utility model can not only realize the intelligent control of traditional functions, but also further expand the functions of the smart hair dryer, and use it as a night light, atmosphere light, etc. In this example, the Bluetooth communication unit is used to further realize the intelligence of the smart hair dryer. For example, Bluetooth control can be performed through a mobile phone. After turning on the Bluetooth function of the mobile phone, the user can use a dedicated mobile phone APP to select which mode the hair dryer should work in priority and the order of the working modes after turning on the machine. The user can set the heating power value and working time of the hair dryer APP mode through the APP, and save the usage setting record in the hair dryer APP mode. The hair dryer can also use a dedicated mobile phone APP to upgrade the system's program over the air (OTA), and the program can be updated without disassembling the machine, thereby achieving the function of updating and upgrading the product.

[0059] The specific implementation methods described above are preferred implementation methods of the present utility model, and are not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation methods. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. Intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor, characterized by: It includes a main control board and a high-speed DC brushless motor driven by the main control board. The main control board includes a power module, a heating load module, a heating drive module driving the heating load module to heat, a main control module, a motor control module and an intelligent temperature sensing module, wherein: The main control module is provided with a main control unit, which is used to be connected to the motor control module to control the working state of the motor and the heating load module, and the output end of the motor control module is connected to the high-speed DC brushless motor; It also includes a TOF distance sensing module, which is connected to the main control unit and is used to detect the distance between the smart hair dryer and the surface of hair or objects. The input end of the intelligent temperature sensing module is connected to the temperature sensor, and the output end is connected to the main control module.

2. The intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor according to claim 1, characterized in that: The main control module also includes a Bluetooth communication unit, which is used to communicate with a host computer to enable the host computer to control the circuit of the intelligent hair dryer control panel.

3. The intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor according to claim 1, characterized in that: The motor control module is provided with an MCU connected to the main control module, and the MCU is used to transmit the motor working status to the main control module.

4. The intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor according to claim 3, characterized in that: The motor control module also includes a motor drive unit, a current acquisition unit, an analog-to-digital conversion unit and an interface CN1 respectively connected to the MCU. The MCU is connected to the main control unit via the interface CN1. The MCU controls the motor via the motor drive unit and obtains motor information.

5. The intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor according to claim 4, characterized in that: The motor drive unit adopts a BLDC brushless direct current motor drive chip U4, the MCU adopts a sensorless FOC controller, and a temperature sensor is provided inside the BLDC brushless direct current motor drive.

6. The intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor according to claim 5, characterized in that: The pin 11 of the BLDC brushless direct current motor driver chip U4 is connected to the pin 16 of the MCU through the temperature acquisition unit. The temperature acquisition unit includes a capacitor C20, a resistor R36, a resistor R66 and a capacitor C13, wherein the capacitor C12 and the resistor R36 are connected in series between the pin 11 of the BLDC brushless direct current motor driver chip U4 and the pin 16 of the MCU, one end of the capacitor C13 and the resistor R66 are respectively connected to the two ends of the resistor R36, the other end of the capacitor C13 is grounded, and the other end of the resistor R66 is connected to the power supply; The analog-to-digital conversion unit is used for MCU to collect voltage information, including resistors R8, R21, and R27 connected in series in sequence, one end of the series resistor string is grounded, and the other end is connected to the power supply, and also includes resistor R26 and capacitor C14, wherein the resistor R26 is connected between the resistor R21 and the resistor R27, the other end of the resistor R26 is respectively connected to one end of the capacitor C14 and pin 1 of the MCU, and the other end of the capacitor C14 is grounded.

7. The intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor according to claim 4, characterized in that: The current acquisition unit includes a sampling resistor connected to the motor drive unit and a current operational amplifier unit connected to the output end of the sampling resistor, the output end of the current operational amplifier unit is connected to the input end of the MCU, wherein the current operational amplifier unit includes branches respectively having the same three-phase structure, each branch includes a first resistor and a second resistor connected in series on two acquisition lines, and a first capacitor with both ends connected in parallel on the two acquisition lines.

8. The intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor according to any one of claims 1 to 7, characterized in that: It also includes a human-computer interaction module connected to the main control module, The human-computer interaction module includes an operation area, and the operation area is provided with a first button for controlling light display, a second button for controlling a working mode, and a third button for controlling cold air / hot air.

9. The intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor according to claim 8, characterized in that: It also includes a light display module, which includes a first light display unit and a second light display unit. The first light display unit is provided with a plurality of LED lights, which are respectively connected to the output end of the main control unit. The second light display unit includes a plurality of atmosphere lights and a switch unit for controlling the atmosphere lights. The atmosphere lights are provided with RGB three-color lamp beads. The switch unit includes a first switch tube, a second switch tube and a third switch tube. The emitters of the first switch tube, the second switch tube and the third switch tube are grounded, and the bases are respectively connected to the R, G and B control ends of the main control unit. The collector of the first switch tube is respectively connected to the R color lamp beads of the plurality of atmosphere lights, the collector of the second switch tube is respectively connected to the G color lamp beads of the plurality of atmosphere lights, and the collector of the third switch tube is respectively connected to the B color lamp beads of the plurality of atmosphere lights.

10. The intelligent hair dryer with TOF distance sensor and high-speed DC brushless motor according to any one of claims 1 to 7, characterized in that: The heating load module includes a normally open switch SW1, a fuse TF, a heating wire and a temperature control switch TH which are respectively connected in series between the power module and the heating drive module, wherein the temperature control switch TH is used to automatically disconnect the heating wire heating when the set temperature is exceeded.

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