WO2018205451A1 - 手持电吹风 - Google Patents

手持电吹风 Download PDF

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Publication number
WO2018205451A1
WO2018205451A1 PCT/CN2017/098869 CN2017098869W WO2018205451A1 WO 2018205451 A1 WO2018205451 A1 WO 2018205451A1 CN 2017098869 W CN2017098869 W CN 2017098869W WO 2018205451 A1 WO2018205451 A1 WO 2018205451A1
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WO
WIPO (PCT)
Prior art keywords
resistor
comparator
connection point
air inlet
air
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Application number
PCT/CN2017/098869
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English (en)
French (fr)
Inventor
宜尔轩
林�源
Original Assignee
深圳市物种起源科技有限公司
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Publication of WO2018205451A1 publication Critical patent/WO2018205451A1/zh

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    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands

Definitions

  • the present invention relates to a handheld device for hair care, and more particularly to a hand held hair dryer.
  • the hair dryers of the prior art are mainly composed of a brush motor, a fan blade, a heating resistor wire and a switch. After the power is turned on, the switch is closed, the brush motor drives the fan blade to rotate the air, and the air is heated by the energized heating resistance wire, and finally flows out from the air nozzle to achieve the purpose of dry hair, hair styling, etc., and the volume of the hair dryer of the above structure Larger, heavier, it is easy to cause user fatigue during long-term use.
  • the fan blade is close to the air inlet, and the exposed area is large, which causes the risk of hair being caught in the motor during use, thus affecting the use. Convenience and practicality.
  • the object of the present invention is to provide a hand-held hair dryer which is small in size and light in weight, and which avoids the occurrence of hair being caught by the air inlet into the motor of the fan module, in order to solve the deficiencies of the above technology.
  • the hand-held hair dryer designed by the invention comprises: a casing, an air inlet, an air outlet, a fan module and a heating module, wherein the air inlet and the air outlet are arranged on the casing, and the air duct, the air inlet and the outlet are arranged in the casing
  • the tuyere and the air duct form a through gas passage, and the heating module and the fan module are sequentially disposed on the gas passage from top to bottom;
  • the casing is cylindrical, the air inlet is disposed at the lower end of the cylinder, and the air outlet is disposed at the upper end of the cylinder And facing the X direction;
  • the air outlet is in the shape of a ring, the middle is outside;
  • the fan module is composed of a small brushless motor and a fan blade, and is located in the middle of the gas passage.
  • the air inlet is composed of an air inlet baffle and a filter screen
  • the air inlet baffle is a baffle plate having a plurality of through holes
  • the filter mesh is a sponge filter mesh
  • the method further includes a line control board disposed at the bottom of the fan module, and a bottom surface of the air inlet baffle A protective sleeve is provided, and the top of the protective sleeve is sequentially inserted into the air inlet baffle and the filter screen, and the power supply cable is inserted into the protective cover, the transformer and the microcontroller are provided on the line control board, and the power supply cable passes through the transformer and the microcontroller. connection.
  • the switch button and the indicator light are further included, and the switch button and the indicator light are all connected to the microcontroller of the line control board.
  • the method further comprises a temperature sensor, a temperature adjustment button and a thyristor rectifier component, the thyristor rectifier component, the temperature sensor and the temperature adjustment button are all connected with the microcontroller of the line control board, and the thyristor rectifier component is connected with the heating module. And the temperature sensor and the heating module are arranged on the air duct.
  • the utility model further comprises a wind adjustment button for adjusting the wind of the fan module, the wind adjustment button is connected with the microcontroller of the line control board, and the line control board is provided with a power MOS field effect transistor for pulse width modulation of the direct current, the power The MOS field effect transistor is connected to the brushless motor of the fan module.
  • control circuit further comprises a control circuit for controlling the brushless motor of the fan module to perform high speed control, and the control circuit comprises a comparator U21, a comparator U22, a comparator U23, a resistor R10, a resistor R11, a resistor R12, a resistor R13, Resistor R14, resistor R15, resistor R17, resistor R18, resistor R44, R45, resistor R46, capacitor C23, capacitor C24 and capacitor C25;
  • Resistor R11 is connected in series with resistor R12
  • resistor R14 is connected in series with resistor R15
  • resistor R17 is connected in series with resistor R18
  • resistor R12, resistor R15 and resistor R18 are respectively connected to the three-phase contacts on the three-phase brushless motor in the high speed fan.
  • the inverting input terminal of the comparator U21, the inverting input terminal of the comparator U22, the inverting input terminal of the comparator U23, the end of the resistor R13, and the end of the resistor R16 are all connected to one end of the resistor R10, and the resistor R11 and the resistor R12 are connected.
  • connection point between the connection is connected to the other end of the resistor R10, the connection point between the resistor R14 and the resistor R15 is connected to the other end of the R13, the connection point between the resistor R17 and the resistor R18 and the other point of the R16 One end is connected, and the connection point between the resistor R11 and the resistor R12, the connection point between the resistor R14 and the resistor R15, and the connection point between the resistor R17 and the resistor R18 are voltage dividing points of the voltage;
  • the non-inverting input terminal of the comparator U21 is connected between the connection point between the resistor R11 and the resistor R12 and the resistor R10, and the non-inverting input terminal of the comparator U22 is connected between the connection point between the resistor R14 and the resistor R15 and the resistor R13.
  • the non-inverting input terminal of the comparator U23 is connected between the connection point between the resistor R117 and the resistor R18 and the resistor R16;
  • An output of the comparator U21, an output of the comparator U22, and an output of the comparator U23 are all connected to a microcontroller on the line control board;
  • the two ends of the resistor R44 are respectively connected to the positive pole and the output end of the power supply of the comparator U21; the two ends of the resistor R45 are respectively connected with the positive pole and the output end of the power supply of the comparator U22; the two ends of the resistor R46 are respectively connected with the positive pole of the power supply of the comparator U23. Output connection;
  • the two ends of the capacitor C23 are respectively connected with the connection point between the resistor R10 and the voltage dividing point and the ground end of the R11, and the two ends of the capacitor C24 are respectively connected with the connection point between the resistor R13 and the voltage dividing point and the ground end of the R14, The two ends of the capacitor C25 are respectively connected to the connection point between the resistor R16 and the voltage dividing point and the ground end of the R17.
  • the bottom of the air duct is fixed with an ion discharge ring
  • the ion discharge ring is disposed on the top of the brushless motor of the fan module
  • the ion discharge ring is connected with the transformer on the line control board
  • the inner ring of the ion discharge ring is disposed to generate a large amount Tip with positive and negative charge ion wind.
  • the bottom of the air duct is fixed with a silicone ring, and the brushless motor and the fan blade of the fan module are disposed in the silicone ring.
  • the heating module has a flat plate shape, and the inner side of the flat heating module is provided with heat dissipating fins.
  • the hand-held hair dryer designed by the invention has a structure that moves the air inlet and the air outlet away from each other and changes the wind direction.
  • the unique non-exposed fan design avoids the hair being entangled during use, improves the safety during use, and is light in weight, small in size, convenient to use, and improved in practicality.
  • Figure 1 is a schematic view of the overall structure of the embodiment (1);
  • Figure 2 is a schematic view of the overall structure of the embodiment (2);
  • Figure 3 is a structural diagram of a control circuit of the embodiment
  • Figure 4 is a flow chart of the commutation control of the embodiment.
  • the handheld hair dryer described in this embodiment includes: a housing 10, an air inlet 210, an air outlet 710, a fan module 300, and a heating module 500, the air inlet 210 and the air outlet.
  • the 710 is disposed on the casing 10, and the air duct 700 is disposed in the casing 10.
  • the air inlet 210, the air outlet 710, and the air duct 700 form a through gas passage.
  • the heating module 500 and the fan module 300 are sequentially disposed from top to bottom.
  • the casing 10 On the gas passage; the casing 10 has a cylindrical shape, the air inlet 210 is disposed at the lower end of the cylinder, the air outlet 710 is disposed at the upper end of the cylinder and faces the X direction; the air outlet 710 has a circular ring shape, and forms an intermediate passage through the outside. And the shape of the channel is a truncated cone shape, so that the air outlet 710 of the structure can drive the air around the air outlet 710 to flow together with the high-speed air of the air outlet 710 to increase the air volume blown, and the fan module 300 is made of a small brushless
  • the motor 302 and the fan blade 301 are formed and located in the middle of the gas passage.
  • the fan module 300 can also be composed of a high energy density NdFeB outer rotor brushless motor 302 and a fan blade 301 made of a composite material, which is characterized by having a single layer of 0.2 mm ultra-thin silicon steel sheet.
  • the stator of the laminated piece and the motor rotor composed of a plurality of pieces of neodymium iron boron magnet can reduce the volume by more than 10 times in the same power condition as the carbon brush motor with the ferrite magnet, thereby realizing the smaller volume of the hand-held hair dryer. , lighter weight.
  • the air inlet 210 is composed of the air inlet baffle 211 and the filter screen 212 to block the entry of foreign matter;
  • the air inlet baffle 211 is a baffle plate with a plurality of through holes, and the through hole is a small hole to block A larger obstacle enters the housing 10;
  • the screen 212 is a sponge screen to block a small volume of dust and hair from entering the housing 10; thereby protecting the user from use by the design of the air inlet 210 During the process, the hair will not be caught in, and the internal parts of the device will not be damaged by entering foreign objects.
  • the embodiment further includes a circuit control board 220 disposed at the bottom of the fan module 300.
  • the bottom surface of the air inlet baffle 211 is provided with a protective cover 102.
  • the top of the protective cover 102 is sequentially inserted into the air inlet baffle 211 and the filter net 212, and is protected.
  • a power supply cable 101 is inserted into the sleeve 102, and a transformer 222 and a microcontroller 221 are disposed on the line control board 220.
  • the power supply cable 101 is connected to the microcontroller 221 via a transformer 222.
  • the power of the hand-held hair dryer requires power, and the power is provided by the power supply cable 101.
  • the other end of the power supply cable 101 is used to connect to the mains socket, so that the line control board 220 controls the operation of the whole machine by using the power provided by the power supply cable 101.
  • 102 is used to protect the power supply cable 101 from being damaged when reciprocatingly bent, and the transformer has the DC power supplied from the power supply cable 101 inverted to three-phase alternating current for driving the fan module 300 and raising the voltage of the low voltage power supply to 3000-4000V DC.
  • the switch button 611 and the indicator light 614 are also included in the embodiment.
  • the switch button 611 and the indicator light 614 are both connected to the microcontroller 221 of the line control board 220.
  • the structure is realized by the illumination of the indicator light 614 to prompt the completion of the power supply of the hair dryer.
  • the color of the indicator light 614 is changed to indicate whether the fan module 300 and the heating module 500 of the hair dryer are activated.
  • the embodiment further includes a temperature sensor 621, a temperature adjustment button 613, and a thyristor rectifying element 223, and the thyristor rectifying element 223, the temperature sensor 621, and the temperature adjustment button 613 are both connected to the line.
  • the microcontroller 221 of the board 220 is connected, the thyristor rectifying element 223 is connected to the heating module 500, and the temperature sensor 621 and the heating module 500 are disposed on the air duct 700.
  • the line control board 220 adjusts the voltage of the AC mains supply provided by the power supply cable 101 through the thyristor rectifying element 223 to drive the heating module 500 to start heating the flowing air, and at the same time, the line control board 220 collects the real-time during the operation.
  • the temperature data detected by the temperature sensor 621 is used to dynamically adjust the heating power of the heating resistor wire in the heating module 500, and the temperature of the blown air is kept in accordance with the set value of the user, and the temperature of the outlet air is constant; the line control panel 220 For the temperature data sampling frequency up to 50 times per second, even if the air outlet or air inlet is blocked, the outlet air temperature will not be too high, which will damage the hair or cause fire risk, thus improving the safety performance and performance.
  • the embodiment further includes a wind adjustment button 612 for adjusting the wind power of the fan module 300.
  • the wind adjustment button 612 is connected to the microcontroller 221 of the line control board 220, and the line control board 220 is provided with a pulse width modulation for direct current.
  • the power MOS field effect transistor 224, the power MOS field effect transistor 224 is connected to the brushless motor 302 of the fan module 300.
  • the line control board 220 can detect the state of the switch button 611 after the power is turned on. After detecting the power-on signal, the set value of the sliding button 612 is adjusted according to the wind power. At this time, the transformer 222 inverts the DC power provided by the power cable 101.
  • the three-phase alternating current is used to drive the fan module 300, and the line control board 220 uses the power MOS field effect transistor 224 (referred to as a power MOSFET) to pulse-width modulate the direct current, thereby controlling the rotational speed of the fan module 300, thereby controlling the air volume, and the structure thereof.
  • the control of the wind is more convenient and reliable, and the performance is improved.
  • control circuit 225 for controlling the high-speed control of the brushless motor 302 of the fan module 300 is further included in the embodiment, and the control circuit 225 includes a comparator U21, a comparator U22, a comparator U23, and a resistor.
  • the control circuit 225 includes a comparator U21, a comparator U22, a comparator U23, and a resistor.
  • Resistor R11 is connected in series with resistor R12
  • resistor R14 is connected in series with resistor R15
  • resistor R17 is connected in series with resistor R18
  • resistor R12, resistor R15 and resistor R18 are respectively connected to the three-phase contacts on the three-phase brushless motor in the high speed fan.
  • the inverting input terminal of the comparator U21, the inverting input terminal of the comparator U22, the inverting input terminal of the comparator U23, the end of the resistor R13, and the end of the resistor R16 are all connected to one end of the resistor R10, and the resistor R11 and the resistor R12 are connected.
  • connection point between the connection is connected to the other end of the resistor R10, the connection point between the resistor R14 and the resistor R15 is connected to the other end of the R13, the connection point between the resistor R17 and the resistor R18 is connected to the other end of the R16, and the resistor R11 and The connection point between the resistor R12, the connection point between the resistor R14 and the resistor R15, and the connection point between the resistor R17 and the resistor R18 are voltage division points of the voltage;
  • the non-inverting input terminal of the comparator U21 is connected between the connection point between the resistor R11 and the resistor R12 and the resistor R10, and the non-inverting input terminal of the comparator U22 is connected between the connection point between the resistor R14 and the resistor R15 and the resistor R13.
  • the non-inverting input terminal of the comparator U23 is connected between the connection point between the resistor R117 and the resistor R18 and the resistor R16;
  • the output of the comparator U21, the output of the comparator U22, and the output of the comparator U23 are all connected to the microcontroller 221 on the line control board 220;
  • the two ends of the resistor R44 are respectively connected to the positive pole and the output end of the power supply of the comparator U21; the two ends of the resistor R45 are respectively connected with the positive pole and the output end of the power supply of the comparator U22; the two ends of the resistor R46 are respectively connected with the positive pole of the power supply of the comparator U23. Output connection;
  • the two ends of the capacitor C23 are respectively connected with the connection point between the resistor R10 and the voltage dividing point and the ground end of the R11, and the two ends of the capacitor C24 are respectively connected with the connection point between the resistor R13 and the voltage dividing point and the ground end of the R14, The two ends of the capacitor C25 are respectively connected to the connection point between the resistor R16 and the voltage dividing point and the ground end of the R17.
  • connection line MOTOR_A and the resistor R15 on the resistor R12 are the drive lines connected to the three-phase brushless motor, and can be inverted input of the comparator U21, the comparator U22, and the comparator U23 through the resistor R10, the resistor R13, and the resistor R16.
  • the midpoint potential SENSE_M is generated on the connection line of the terminal, and the ratio of the resistance values of R11/R12, R14/R15, and R17/R18 is adjusted for different motors to change the turning timing of the comparator U21, the comparator U22, and the comparator U23, and the comparator passes Comparing the midpoint potential SENSE_M and the divided motor three-phase signals EMBF_A, EMBF_B, and EMBF_C to output a pre-zero signal indicating high and low levels, the microcontroller 221 only needs to detect the high and low level zero-crossing signals output by the comparator. Zero crossing can be judged without complicated analog to digital conversion and calculation.
  • the microcontroller 221 first determines the phase of the motor. When the phase angle is within the set range, it will further determine whether the signal before the zero-crossing output of the comparator is correct and accumulate the normal zero-crossing signal. After detecting enough correct zero-crossing signals, the motor starts normally and enters the normal commutation operation. Otherwise, it brakes and gives an alarm signal.
  • the beneficial effects of the above control circuit are: by greatly simplifying the calculation of the zero-crossing signal, reducing the calculation pressure of the microcontroller 221, and the microcontroller 221 can only determine the zero-crossing of the motor by detecting the high and low levels, and optimize the calculation process. Reduce the amount of system calculations while achieving the same drive capability and protection capability.
  • low-speed low-performance microcontroller 221 can be used to achieve high-speed brushless motor drive, reducing the manufacturing cost of manufacturing hand-held hair dryers. In the sales cost at the time of sale, further, it is possible to quickly make a judgment and control the high-speed operation after the motor is driven, and also has the functions of protecting the line control board 220 and the brushless motor.
  • the ion discharge ring 401 is fixed on the bottom of the air duct 700.
  • the ion discharge ring 401 is disposed on the top of the brushless motor 302 of the fan module 300, and the ion discharge ring 401 is connected to the transformer 222 on the line control board 220.
  • the ion discharge ring is connected.
  • the inner ring of 401 is provided with a tip that produces a large amount of positively and negatively charged ion wind.
  • the circuit control board 220 is designed to reduce the influence of static electricity on the hair.
  • the middle transformer transforms the input low voltage power supply, raises the voltage to 3000-4000V DC, and connects to the ion discharge ring 401 through the pressure resistant cable.
  • the ion discharge ring 401 is made of a stainless steel sheet, and the ion wind blows out to neutralize the static electricity on the surface of the object.
  • the surface of the object When the surface of the object has a positive charge, it attracts a negative charge in the ion current. Conversely, when the surface of the object has a negative charge. It will attract the positive charge in the ion current and achieve the purpose of neutralizing the static electricity on the surface of the object and improve the performance.
  • the bottom of the air duct 700 is fixed with a silicone ring 310, and the brushless motor 302 and the fan blade 301 of the fan module 300 are both disposed in the silicone ring.
  • the fan module 300 is not directly in contact with the cylindrical housing through the silicone ring, and the fan module 300 is wrapped by the silicone ring 310, which reduces the influence of the vibration of the brushless motor 302 and the blade 301 of the fan module 300 on the grip and noise during operation.
  • the heating module 500 has a flat shape, and the inner side of the flat heating module is provided with heat dissipating fins 501, and the structure thereof is such that the heat of the heating plate is dissipated in the air duct faster.
  • the heating performance of the heating module is improved, and the outlet air temperature can be quickly increased to the set temperature, so as to avoid the coldness of the hair directly blowing on the hair due to the temperature increase too slow.
  • the fan module 300 When the housing 10 is in operation, the fan module 300 provides the upward vertical blowing pressure.
  • the external air passes through the filter screen composed of the air inlet baffle 211 and the filter screen 212, and then enters the inside of the device, and flows through the line control board 220 and the fan module.
  • the group 300 passes upward through the heating module 500 and finally flows out of the air outlet 700 via the air duct 700.
  • the air flow rate is increased a plurality of times, and the air outlet 710 reaches the highest speed, so that the air emitted at a high speed can drive the air around the air outlet 710 to flow together with the high-speed air of the air outlet 710 to increase the air volume blown, and at the same time
  • the inhaled air heats the air through the heating module 500 before the air flows out, thereby achieving hair care and styling, or for drying other wet items, wherein the above model of the microcontroller uses STM32F103CBT6.

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  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cleaning And Drying Hair (AREA)

Abstract

一种手持电吹风，其包括：壳体（10）、进风口（210）、出风口（710）、风机模块（300）以及加热模块（500），所述进风口（210）和出风口（710）设置于壳体（10）上，壳体（10）内设置有风道（700），进风口（210）、出风口（710）以及风道（700）形成贯通的气体通道，加热模块（500）和风机模块（300）由上至下依次设置于所述气体通道上；壳体（10）呈圆柱体状，进风口（210）设置于圆柱体下端，出风口（710）设置于圆柱体上端且朝向X方向；出风口（710）呈圆环形状，中间通外界；风机模块（300）由小型无刷电机（302）和扇叶（301）组成，并位于气体通道的中部。其结构将进风口（210）与出风口（710）远离并且转变了风向，同时无外露风扇设计避免了使用时头发被卷入。

Description

手持电吹风 技术领域
本发明涉及一种用于头发护理的手持设备，尤其是一种手持电吹风。
背景技术
目前在头发护理的干发和头发造型时，一般采用电吹风的头发护理器具，现有技术中的电吹风主要由有刷电机、扇叶、加热电阻丝以及开关构成。在接入电源后闭合开关，有刷电机带动扇叶旋转推进空气，空气经过通电的加热电阻丝被加热，最终从风嘴流出以达到干发、头发造型等目的，而上述结构的电吹风体积较大、重量重，在长时间使用中容易造成使用者疲惫，另外，扇叶紧贴于进风口，外露面积较大，导致在使用中易发生头发被卷入电机的风险，从而影响使用的方便性和实用性。
发明内容
本发明的目的是为了解决上述技术的不足而设计的一种体积小巧，重量轻，避免发生头发由进风口卷入风机模块的电机中的手持电吹风。
本发明设计的手持电吹风，其包括：壳体、进风口、出风口、风机模块以及加热模块，所述进风口和出风口设置于壳体上，壳体内设置有风道，进风口、出风口以及风道形成贯通的气体通道，加热模块和风机模块由上至下依次设置于所述气体通道上；壳体呈圆柱体状，进风口设置于圆柱体下端，出风口设置于圆柱体上端且朝向X方向；出风口呈圆环形状，中间通外界；风机模块由小型无刷电机和扇叶组成，并位于气体通道的中部。
进一步优选，进风口由进风口档板和滤网组成，进风口档板为设有若干通孔的档板，滤网为海绵滤网。
进一步优选，还包括设于风机模块底部的线路控制板，进风口挡板的底面 设置有保护套，保护套的顶部依次插入进风口挡板和滤网，且保护套内插入有供电线缆，线路控制板上设有变压器和微控制器，供电线缆通过变压器与微控制器连接。
进一步优选，还包括开关按键和指示灯，开关按键和指示灯均与线路控制板的微控制器连接。
进一步优选，还包括温度传感器、温度调节按键和可控硅整流元件，可控硅整流元件、温度传感器和温度调节按键均与线路控制板的微控制器连接，可控硅整流元件与加热模块连接，且温度传感器和加热模块设于风道上。
进一步优选，还包括用于调节风机模块风力的风力调节按键，风力调节按键与线路控制板的微控制器连接，线路控制板上设有用于对直流电进行脉冲宽度调制的功率MOS场效应晶体管，功率MOS场效应晶体管与风机模块的无刷电机连接。
进一步优选，还包括用于控制风机模块的无刷电机进行高转速控制的控制电路，且控制电路包括比较器U21、比较器U22、比较器U23、电阻R10、电阻R11、电阻R12、电阻R13、电阻R14、电阻R15、电阻R17、电阻R18、电阻R44、R45、电阻R46、电容C23、电容C24和电容C25；
电阻R11与电阻R12串联连接，电阻R14与电阻R15串联连接，电阻R17与电阻R18串联连接，电阻R12、电阻R15和电阻R18分别与高转速风机中三相无刷电机上的三相触点连接；
比较器U21的反相输入端、比较器U22的反相输入端、比较器U23的反相输入端、电阻R13的一端和电阻R16的一端均与电阻R10的一端连接，电阻R11与电阻R12之间的连接点与电阻R10的另一端连接，电阻R14与电阻R15之间的连接点与R13的另一端连接，电阻R17与电阻R18之间的连接点与R16的另 一端连接，并且电阻R11与电阻R12之间的连接点、电阻R14与电阻R15之间的连接点、电阻R17与电阻R18之间的连接点均为电压的分压点；
比较器U21的同相输入端连接于电阻R11与电阻R12之间的连接点和电阻R10之间，比较器U22的同相输入端连接于电阻R14与电阻R15之间的连接点和电阻R13之间，比较器U23的同相输入端连接于电阻R117与电阻R18之间的连接点和电阻R16之间；
比较器U21的输出端、比较器U22的输出端和比较器U23的输出端均与线路控制板上的微控制器连接；
电阻R44的两端分别与比较器U21的电源正极和输出端连接；电阻R45的两端分别与比较器U22的电源正极和输出端连接；电阻R46的两端分别与比较器U23的电源正极和输出端连接；
电容C23的两端分别与电阻R10和分压点之间的连接点和R11的接地端连接，电容C24的两端分别与电阻R13和分压点之间的连接点和R14的接地端连接，电容C25的两端分别与电阻R16和分压点之间的连接点和R17的接地端连接。
进一步优选，风道的底部固定有离子放电环，离子放电环设于风机模块的无刷电机顶部，且离子放电环与线路控制板上的变压器连接，离子放电环的内圈设置有可产生大量带正负电荷离子风的尖端。
进一步优选，风道的底部固定有硅胶圈，且风机模块的无刷电机和扇叶均设于硅胶圈内。
进一步优选，加热模块呈平板状，且呈平板状的加热模块内侧面设有散热翅片。
本发明设计的手持电吹风，其结构将进风口与出风口远离并且转变了风向， 同时独特的无外露风扇设计避免了使用时头发被卷入，提高使用时的安全性，而且重量轻，体积小，使用更方便，提高了实用性。
附图说明
图1是实施例的整体结构示意图(一)；
图2是实施例的整体结构示意图(二)；
图3是实施例的控制电路结构图；
图4是实施例的换相控制流程图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本发明保护的范围。
实施例：
如图1和图2所示，本实施例所描述的手持电吹风，其包括：壳体10、进风口210、出风口710、风机模块300以及加热模块500，所述进风口210和出风口710设置于壳体10上，壳体10内设置有风道700，进风口210、出风口710以及风道700形成贯通的气体通道，加热模块500和风机模块300由上至下依次设置于所述气体通道上；壳体10呈圆柱体状，进风口210设置于圆柱体下端，出风口710设置于圆柱体上端且朝向X方向；出风口710呈圆环形状，并形成中间通外界的通道，且通道的形状呈圆锥台体状，从而该结构设计的出风口710可以带动出风口710周围空气流动，与出风口710的高速空气一同流动，提高吹出的风量，风机模块300由小型无刷电机302和扇叶301组成，并位于气体通道的中部。其中风机模块300还可由高能量密度的钕铁硼外转子无刷电机302及采用复合材料制作的扇叶301组成，其特点是拥有单层0.2mm的超薄硅钢片 叠片组成的定子以及多片钕铁硼磁铁组成的电机转子，相比与铁氧体磁铁的碳刷电机，同功率情况下可以将体积缩小10倍以上，从而实现手持电吹风的体积更小，重量更轻。
本实施例中进风口210由进风口档板211和滤网212组成，以阻挡异物进入的作用；进风口档板211为设有若干通孔的档板，其通孔为小孔，以阻挡较大的障碍物进入壳体10内；滤网212为海绵滤网，以阻挡较小体积的灰尘与毛发进入壳体10内；从而通过上述对进风口210的设计达到了保护使用者在使用过程中毛发不会被卷入，同时保护设备内部零件不会因进入异物而造成损坏。
本实施例中还包括设于风机模块300底部的线路控制板220，进风口挡板211的底面设置有保护套102，保护套102的顶部依次插入进风口挡板211和滤网212，且保护套102内插入有供电线缆101，线路控制板220上设有变压器222和微控制器221，供电线缆101通过变压器222与微控制器221连接。手持电吹风工作需要电力，电力由供电线缆101提供，供电线缆101另外一端用于连接市电插座，从而实现线路控制板220利用供电线缆101提供的电力控制整机的运转，保护套102用于保护供电线缆101在往复弯折时不会受到损害，而且变压器具有将供电线缆101提供的直流电逆变为三相交流电用于驱动风机模块300和将低压电源的电压升高至3000-4000V DC。
本实施例中还包括开关按键611和指示灯614，开关按键611和指示灯614均与线路控制板220的微控制器221连接。其结构实现以指示灯614的亮起提示电吹风通电完成，同时按动开关按键后，以指示灯614的颜色转变提示电吹风的风机模块300和加热模块500是否启动。
本实施例中还包括温度传感器621、温度调节按键613和可控硅整流元件223，可控硅整流元件223、温度传感器621和温度调节按键613均与线路控制 板220的微控制器221连接，可控硅整流元件223与加热模块500连接，且温度传感器621和加热模块500设于风道700上。线路控制板220将供电线缆101提供的交流市电通过可控硅整流元件223调整电压后以驱动加热模块500开始对流过的空气进行加热，同时，在运行过程中线路控制板220会实时采集温度传感器621检测的温度数据，并以此对加热模块500中加热电阻丝的加热功率进行动态调整，保持吹出的空气温度符合用户的设定值，并得到出风温度的恒定；线路控制板220对于温度数据的采样频率高达50次每秒，即使出现出风口或进风口被堵塞的情况，出风温度也不会过高从而损伤毛发或引发起火风险，从而提高了安全性能和使用性能。
本实施例中还包括用于调节风机模块300风力的风力调节按键612，风力调节按键612与线路控制板220的微控制器221连接，线路控制板220上设有用于对直流电进行脉冲宽度调制的功率MOS场效应晶体管224，功率MOS场效应晶体管224与风机模块300的无刷电机302连接。其中线路控制板220在接入电源后可以检测开关按键611的状态，在检测到开机信号后根据风力调节滑动按键612的设定值，此时，变压器222将供电线缆101提供的直流电逆变为三相交流电用于驱动风机模块300，线路控制板220利用功率MOS场效应晶体管224(简称功率MOSFET)对直流电进行脉冲宽度调制，实现对风机模块300的转速进行控制，从而控制风量，其结构使得对风力的控制较为方便可靠，提高了使用性能。
如图4所示，本实施例中还包括用于控制风机模块300的无刷电机302进行高转速控制的控制电路225，且控制电路225包括比较器U21、比较器U22、比较器U23、电阻R10、电阻R11、电阻R12、电阻R13、电阻R14、电阻R15、电阻R17、电阻R18、电阻R44、R45、电阻R46、电容C23、电容C24和电容C25；
电阻R11与电阻R12串联连接，电阻R14与电阻R15串联连接，电阻R17与电阻R18串联连接，电阻R12、电阻R15和电阻R18分别与高转速风机中三相无刷电机上的三相触点连接；
比较器U21的反相输入端、比较器U22的反相输入端、比较器U23的反相输入端、电阻R13的一端和电阻R16的一端均与电阻R10的一端连接，电阻R11与电阻R12之间的连接点与电阻R10的另一端连接，电阻R14与电阻R15之间的连接点与R13的另一端连接，电阻R17与电阻R18之间的连接点与R16的另一端连接，并且电阻R11与电阻R12之间的连接点、电阻R14与电阻R15之间的连接点、电阻R17与电阻R18之间的连接点均为电压的分压点；
比较器U21的同相输入端连接于电阻R11与电阻R12之间的连接点和电阻R10之间，比较器U22的同相输入端连接于电阻R14与电阻R15之间的连接点和电阻R13之间，比较器U23的同相输入端连接于电阻R117与电阻R18之间的连接点和电阻R16之间；
比较器U21的输出端、比较器U22的输出端和比较器U23的输出端均与线路控制板220上的微控制器221连接；
电阻R44的两端分别与比较器U21的电源正极和输出端连接；电阻R45的两端分别与比较器U22的电源正极和输出端连接；电阻R46的两端分别与比较器U23的电源正极和输出端连接；
电容C23的两端分别与电阻R10和分压点之间的连接点和R11的接地端连接，电容C24的两端分别与电阻R13和分压点之间的连接点和R14的接地端连接，电容C25的两端分别与电阻R16和分压点之间的连接点和R17的接地端连接。
其上述控制电路的结构工作时，电阻R12上的连接线MOTOR_A、电阻R15上 的连接线MOTOR_B、电阻R18上的连接线MOTOR_C为与三相无刷电机连接的驱动线，通过电阻R10、电阻R13、电阻R16可以在比较器U21、比较器U22、比较器U23的反相输入端的连接线上产生中点电位SENSE_M，并且针对不同电机调整R11/R12、R14/R15、R17/R18阻值的比值可以改变比较器U21、比较器U22、比较器U23的翻转时机，比较器通过比较中点电位SENSE_M以及分压后的电机三相信号EMBF_A、EMBF_B、EMBF_C从而输出以高低电平表示的过零前信号，微控制器221仅需要检测比较器输出的高低电平过零信号即可判断过零，无需复杂的模拟数字转换以及运算。
同时如图5所示，电机起动时微控制器221会首先判断电机相位，相位角在设定范围内时会进一步判断比较器输出的过零前信号是否正确并累加存储正常的过零信号，在检测到足够多的正确过零信号后电机启动正常，进入正常的换相运算，反之则刹车并给出报警信号。
其上述控制电路的有益效果为：通过大幅简化了对于过零信号的计算，降低微控制器221的计算压力，并且微控制器221仅可通过检测高低电平判断电机过零，优化了计算流程，在实现同样驱动能力及保护能力时降低系统运算量；同时能够利用价格较低的低性能微控制器221就可实现高转速的无刷电机驱动，降低了在制造手持电吹风的制造成本和在销售时的销售成本，进一步，可快速的作出判断并进行控制电机驱动后高转速运行，同时还具有保护线路控制板220和无刷电机的作用。
本实施例中风道700的底部固定有离子放电环401，离子放电环401设于风机模块300的无刷电机302顶部，且离子放电环401与线路控制板220上的变压器222连接，离子放电环401的内圈设置有可产生大量带正负电荷离子风的尖端。其中，为了降低静电对于毛发产生的影响而设计的结构，线路控制板220 中变压器对输入的低压电源进行变压，将电压升高至3000-4000V DC，并通过耐压线缆与离子放电环401相连。离子放电环401由不锈钢片制成，离子风吹出后可以中和物体表面的静电，当物体表面带有正电荷时，会吸引离子流中的负电荷，相反，当物体表面带有负电荷时，会吸引离子流中的正电荷，而达到中和掉物体表面的静电的目的，提高使用性能。
本实施例中风道700的底部固定有硅胶圈310，且风机模块300的无刷电机302和扇叶301均设于硅胶圈内。通过硅胶圈使得风机模块300不与圆柱体外壳直接接触，而且风机模块300由硅胶圈310包裹，减少了风机模块300的无刷电机302和扇叶301工作时震动对于握感及噪音的影响。
如图3所示，本实施例中加热模块500呈平板状，且呈平板状的加热模块内侧面设有散热翅片501，其结构使得加热板加热后的热量散布于风道内速度较快，提高了加热模块的加热性能，而且可快速将出风温度提高至设定温度，避免发生因温度提高过慢而导致直接吹于头发上着凉感冒的作用。
工作原理：壳体10在工作时由风机模块300提供向上垂直吹风的压力，外部空气经过进风口挡板211、滤网212组成的滤网后进入设备内部，流过线路控制板220及风机模组300，向上经过加热模块500，最终经由风道700后由出风口710流出。在风道700内空气流速被多次提高，在出风口710达到最高速，从而高速射出的空气可以带动出风口710周围空气流动，与出风口710的高速空气一同流动，提高吹出的风量，同时吸入的空气在空气流出前通过加热模块500对空气进行加热，从而实现头发护理及造型，或者用于其它潮湿物品的烘干，其中上述的微控制器的型号采用STM32F103CBT6。
本发明不局限于上述最佳实施方式，任何人在本发明的启示下都可得出其他各种形式的产品，但不论在其形状或结构上作任何变化，凡是具有与本申请 相同或相近似的技术方案，均落在本发明的保护范围之内。

Claims (10)

  1. 一种手持电吹风，其包括：
    壳体、进风口、出风口、风机模块以及加热模块，所述进风口和出风口设置于壳体上；
    其特征在于，壳体内设置有风道，进风口、出风口以及风道形成贯通的气体通道，加热模块和风机模块由上至下依次设置于所述气体通道上；
    壳体呈圆柱体状，进风口设置于圆柱体下端，出风口设置于圆柱体上端且朝向X方向；出风口呈圆环形状，中间通外界；
    风机模块由小型无刷电机和扇叶组成，并位于气体通道的中部。
  2. 根据权利要求1所述的手持电吹风，其特征在于，进风口由进风口档板和滤网组成，进风口档板为设有若干通孔的档板，滤网为海绵滤网。
  3. 根据权利要求2所述的手持电吹风，其特征在于，还包括设于风机模块底部的线路控制板，进风口挡板的底面设置有保护套，保护套的顶部依次插入进风口挡板和滤网，且保护套内插入有供电线缆，线路控制板上设有变压器和微控制器，供电线缆通过变压器与微控制器连接。
  4. 根据权利要求3所述的手持电吹风，其特征在于，还包括开关按键和指示灯，开关按键和指示灯均与线路控制板的微控制器连接。
  5. 根据权利要求4所述的手持电吹风，其特征在于，还包括温度传感器、温度调节按键和可控硅整流元件，可控硅整流元件、温度传感器和温度调节按键均与线路控制板的微控制器连接，可控硅整流元件与加热模块连接，且温度传感器和加热模块设于风道上。
  6. 根据权利要求5所述的手持电吹风，其特征在于，还包括用于调节风机模块风力的风力调节按键，风力调节按键与线路控制板的微控制器连接，线路控制 板上设有用于对直流电进行脉冲宽度调制的功率MOS场效应晶体管，功率MOS场效应晶体管与风机模块的无刷电机连接。
  7. 根据权利要求6所述的手持电吹风，其特征在于，还包括用于控制风机模块的无刷电机进行高转速控制的控制电路，且控制电路包括比较器U21、比较器U22、比较器U23、电阻R10、电阻R11、电阻R12、电阻R13、电阻R14、电阻R15、电阻R17、电阻R18、电阻R44、R45、电阻R46、电容C23、电容C24和电容C25；
    电阻R11与电阻R12串联连接，电阻R14与电阻R15串联连接，电阻R17与电阻R18串联连接，电阻R12、电阻R15和电阻R18分别与高转速风机中三相无刷电机上的三相触点连接；
    比较器U21的反相输入端、比较器U22的反相输入端、比较器U23的反相输入端、电阻R13的一端和电阻R16的一端均与电阻R10的一端连接，电阻R11与电阻R12之间的连接点与电阻R10的另一端连接，电阻R14与电阻R15之间的连接点与R13的另一端连接，电阻R17与电阻R18之间的连接点与R16的另一端连接，并且电阻R11与电阻R12之间的连接点、电阻R14与电阻R15之间的连接点、电阻R17与电阻R18之间的连接点均为电压的分压点；
    比较器U21的同相输入端连接于电阻R11与电阻R12之间的连接点和电阻R10之间，比较器U22的同相输入端连接于电阻R14与电阻R15之间的连接点和电阻R13之间，比较器U23的同相输入端连接于电阻R117与电阻R18之间的连接点和电阻R16之间；
    比较器U21的输出端、比较器U22的输出端和比较器U23的输出端均与线路控制板上的微控制器连接；
    电阻R44的两端分别与比较器U21的电源正极和输出端连接；电阻R45的 两端分别与比较器U22的电源正极和输出端连接；电阻R46的两端分别与比较器U23的电源正极和输出端连接；
    电容C23的两端分别与电阻R10和分压点之间的连接点和R11的接地端连接，电容C24的两端分别与电阻R13和分压点之间的连接点和R14的接地端连接，电容C25的两端分别与电阻R16和分压点之间的连接点和R17的接地端连接。
  8. 根据权利要求3所述的手持电吹风，其特征在于，风道的底部固定有离子放电环，离子放电环设于风机模块的无刷电机顶部，且离子放电环与线路控制板上的变压器连接，离子放电环的内圈设置有可产生大量带正负电荷离子风的尖端。
  9. 根据权利要求8所述的手持电吹风，其特征在于，风道的底部固定有硅胶圈，且风机模块的无刷电机和扇叶均设于硅胶圈内。
  10. 根据权利要求5所述的手持电吹风，其特征在于，加热模块呈平板状，且呈平板状的加热模块内侧面设有散热翅片。
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