阅读说明：本技术 一种电池类吹风机的控制方法及设备 (Control method and device for battery type hair dryer ) 是由 苏宇冠 刘家斌 黄志强 刘双春 魏肃 于 2021-01-08 设计创作，主要内容包括：本发明涉及电吹风机控制技术领域,特别涉及一种电池类吹风机的控制方法及设备,包括通过电池检测电路获取当前电池电压实时数据；根据获得的所述电池电压实时数据以及设定的恒功率值来反向推导程序调节占空比值以达到恒功率的风加热控制；根据获得的所述电池电压实时数据以及设定的程序调节占空比值来控制电机两端电压值以达到在一定时间内渐变式风速调节。本发明提供的电池类吹风机的控制方法,利用电池检测电路获取当前电池电压实时数据,再通过软件算法可将温度和风速控制在预设的范围内,满足了头发表面对风温的需求,使得人体感受到风温的触感前后基本一致。既达到了保持温度持续恒定和风速持续调节的效果,又能节省电池的电量增加续航。(The invention relates to the technical field of electric hair dryer control, in particular to a control method and equipment of a battery type hair dryer, which comprises the steps of obtaining current battery voltage real-time data through a battery detection circuit; according to the obtained real-time battery voltage data and a set constant power value, a reverse derivation program is used for adjusting a duty ratio value so as to achieve wind heating control of constant power; and controlling the voltage values at two ends of the motor according to the acquired real-time battery voltage data and a set program regulation duty ratio value to achieve gradual wind speed regulation within a certain time. According to the control method of the battery type hair dryer, the battery detection circuit is used for obtaining the current battery voltage real-time data, and the temperature and the wind speed can be controlled within the preset range through the software algorithm, so that the requirement of a head table on the wind temperature is met, and the human body feels basically consistent before and after the touch feeling of the wind temperature. The effects of keeping the temperature constant and the wind speed adjusted continuously are achieved, and the electric quantity of the battery can be saved to increase the endurance.)

1. A method of controlling a battery-type hair dryer, comprising:

s100, acquiring current battery voltage real-time data through a battery detection circuit;

s200, reversely deducing a program to adjust a duty ratio value according to the acquired real-time battery voltage data and a set constant power value so as to achieve wind heating control of constant power;

and S300, controlling the voltage values at two ends of the motor according to the acquired real-time battery voltage data and a set program regulation duty ratio value to achieve gradual change type wind speed regulation within a certain time.

2. The method of claim 1, wherein the step of controlling the battery-type hair dryer comprises: the constant power value and the gradual change type wind speed adjusting duty ratio value are obtained according to the moisture content of the hair.

3. A method of controlling a battery-type hair dryer according to claim 2, wherein: the hair moisture content is estimated from the actual moisture evaporation time of the hair.

4. The method of claim 1, wherein the step of controlling the battery-type hair dryer comprises: the duty cycle value is adjusted to achieve wind heating control of constant power using the following formula (1) reverse derivation procedure;

K1＝Q*R/(VBAT)² (1)

wherein:

k1 is the actual adjusted duty cycle value, ranging between 0-1;

q is the constant heater wire power;

r is the fixed internal resistance of the heating wire;

VBAT is the current battery voltage value.

5. The method of claim 1, wherein the step of controlling the battery-type hair dryer comprises: obtaining the voltage value at two ends of the motor by using the following formula (2) to achieve gradual wind speed regulation within a certain time;

Vmoto＝VBAT*K2 (2)

wherein the content of the first and second substances,

k2 is the actual adjusted duty cycle value, ranging between 0-1;

vmoto is the current motor operating voltage;

VBAT is the current battery voltage value.

6. The utility model provides a battery class hair-dryer equipment, includes the fan body, its characterized in that: a temperature control module, a wind speed control module and a voltage acquisition module are arranged in the body;

the voltage acquisition module is used for acquiring the current battery voltage real-time data through the battery detection circuit;

the temperature control module is used for adjusting a duty ratio value through a reverse derivation program according to the acquired real-time battery voltage data so as to achieve wind heating control of constant power;

the wind speed control module is used for adjusting the duty ratio value according to the acquired real-time battery voltage data and a set program to control the voltage values at two ends of the motor so as to achieve gradual wind speed adjustment within a certain time.

7. A battery-type hair dryer apparatus as claimed in claim 6, wherein: the voltage acquisition module comprises a battery detection circuit, the battery detection circuit comprises a triode T3, a triode T4, a capacitor C23, a resistor R41, a resistor R42, a resistor R43, a resistor R25, a resistor R26 and a resistor R20, and the base electrode of the triode T3 is connected with the single chip microcomputer through the resistor R44 and is also connected with the emitter electrode of the triode T3 through the resistor R41; the emitting electrode of the triode is not only connected with the AD port of the singlechip through a capacitor C23, but also connected with the ground wire; the emitter of the triode T4 is not only connected with the battery, but also connected with the base of the triode T4 through a resistor R42, and the collector of the triode T4 is connected with the collector of the triode T3 through a resistor R43; the collector of the triode T4 is connected with one end of a resistor R26 and one end of a resistor R25 through a resistor R20, wherein the other end of the resistor R25 is connected with the ground wire, and the other end of the resistor R26 is connected with the AD port of the single chip microcomputer.

8. A battery-type hair dryer apparatus as claimed in claim 6, wherein: the temperature control module comprises a heating wire control circuit, the heating wire control circuit comprises an MOS (metal oxide semiconductor) tube Q1, an MOS tube Q2, a resistor R13, a resistor R15 and a heating wire, and the D pole of the MOS tube Q1 is respectively connected with the heating wire, a battery and the D pole of the MOS tube Q2; the S pole of the MOS transistor Q1 and the S pole of the MOS transistor Q2 are connected with the ground wire; the G pole of the MOS transistor Q1 is connected with the G pole of the MOS transistor Q2, is connected with the single chip microcomputer through R3 and is connected with the S pole of the MOS transistor Q1 through R15.

9. A battery-type hair dryer apparatus as claimed in claim 6, wherein: the wind speed control module comprises a motor control circuit, the motor control circuit comprises a motor, a capacitor C16, a diode D3, an MOS transistor Q5, a resistor R14, a resistor R16, a resistor R2, a resistor R7, a resistor R10 and a capacitor C30, the capacitor C16 and the diode D3 are connected in parallel and then connected to the positive electrode and the negative electrode of the motor, the positive electrode of the motor is connected with a battery, and the negative electrode of the motor is connected with the D electrode of the MOS transistor Q5; the G pole of the MOS tube Q5 is connected with the PWN port of the singlechip through R14, and is also connected with the AD port of the singlechip and the capacitor C30 through R16 respectively; the output end of the capacitor C30 is connected with the ground wire; the S pole of the MOS transistor Q5 is connected with the ground wire through a resistor R2 and a resistor R7 respectively.

Technical Field

The invention relates to the technical field of electric hair dryer control, in particular to a control method and equipment of a battery type hair dryer.

Background

The electric hair dryer is common heating equipment in daily life, is mainly divided into an alternating current electric hair dryer and a battery type electric hair dryer according to different power supply sources, and the power of the alternating current electric hair dryer can be more than 1000W, so that the wind speed and the wind temperature can be well kept. The battery type hair drier needs to be powered by a battery, so that the heating power cannot be very high, usually only one or two hundred watts can be achieved, and the battery voltage can slowly drop in the actual working process, so that the power of the hair drier is slowly reduced. The temperature of air blown out by the hair dryer is reduced due to the reduction of the power of the hair dryer, and the heat provided by the hair dryer is not enough for evaporation and absorption of water, so that the comfortable temperature required by blowing cannot be met.

For example, the application number is CN201922304018.1, the patent name of application is "a novel wireless hair drier", published day: in 2019, 12 and 09, a novel wireless electric hair dryer is disclosed, which comprises an air duct, a handle, a storage battery, a switch, a motor, fan blades and a low-power heat exchanger, wherein the low-power heat exchanger is arranged in the air duct and is close to one side of an air outlet, the low-power heat exchanger comprises a low-power electric heater and a heat exchanger, the low-power electric heater is tightly attached to the heat exchanger, and the storage battery is arranged in the handle.

The application adopts the storage battery as the energy, uses after charging, and the power heat exchanger that joins in marriage obtains hot-blastly, has the security height, removes the advantage that convenient, small, light in weight. However, its weak point lies in, on the one hand, the power of this type of hairdryer is low, can't satisfy people's hair surface to the demand of wind-warm syndrome, and on the other hand can't adjust wind-warm syndrome, and the user is difficult to regulate and control in the use for the experience difference in the earlier stage of blowing and later stage is great.

Disclosure of Invention

In order to solve the problem of low power of the battery type hair dryer mentioned in the prior art, the invention provides a control method of the battery type hair dryer, which comprises S100, acquiring the current battery voltage real-time data through a battery detection circuit; s200, reversely deducing a program to adjust a duty ratio value according to the acquired real-time battery voltage data and a set constant power value so as to achieve wind heating control of constant power; and S300, controlling the voltage values at two ends of the motor according to the acquired real-time battery voltage data and a set program regulation duty ratio value to achieve gradual change type wind speed regulation within a certain time.

On the basis of the technical scheme, further, the constant-power wind heating and gradual-change wind speed adjusting duty ratio value is obtained according to the moisture content of the hair.

On the basis of the technical scheme, further, the moisture content of the hair is estimated according to the actual moisture evaporation time of the hair.

On the basis of the technical scheme, further, the duty ratio value is adjusted by utilizing the following formula (1) to reversely derive a program so as to achieve wind heating control with constant power;

K1＝Q*R/(VBAT)2 (1)

wherein:

k1 is the actual adjusted duty cycle value, ranging between 0-1;

q is the constant heater wire power;

r is the fixed internal resistance of the heating wire;

VBAT is the current battery voltage value.

On the basis of the technical scheme, the voltage values at two ends of the motor are further obtained by using the following formula (2) so as to achieve gradual change type wind speed regulation within a certain time;

Vmoto＝VBAT*K2 (2)

wherein the content of the first and second substances,

k2 is the actual adjusted duty cycle value, ranging between 0-1;

vmoto is the current motor operating voltage;

VBAT is the current battery voltage value.

The invention also provides battery type blower equipment which comprises a blower body, wherein a temperature control module, a wind speed control module and a voltage acquisition module are arranged in the blower body;

the voltage acquisition module is used for acquiring the current battery voltage real-time data through the battery detection circuit;

the temperature control module is used for adjusting a duty ratio value through a reverse derivation program according to the acquired real-time battery voltage data so as to achieve wind heating control of constant power;

the wind speed control module is used for adjusting the duty ratio value according to the acquired real-time battery voltage data and a set program to control the voltage values at two ends of the motor so as to achieve gradual wind speed adjustment within a certain time.

On the basis of the technical scheme, the voltage acquisition module further comprises a battery detection circuit, the battery detection circuit comprises a triode T3, a triode T4, a capacitor C23, a resistor R41, a resistor R42, a resistor R43, a resistor R25, a resistor R26 and a resistor R20, and the base of the triode T3 is connected with the single chip microcomputer through the resistor R44 and is also connected with the emitter of the triode T3 through the resistor R41; the emitting electrode of the triode is not only connected with the AD port of the singlechip through a capacitor C23, but also connected with the ground wire; the emitter of the triode T4 is not only connected with the battery, but also connected with the base of the triode T4 through a resistor R42, and the collector of the triode T4 is connected with the collector of the triode T3 through a resistor R43; the collector of the triode T4 is connected with one end of a resistor R26 and one end of a resistor R25 through a resistor R20, wherein the other end of the resistor R25 is connected with the ground wire, and the other end of the resistor R26 is connected with the AD port of the single chip microcomputer.

On the basis of the technical scheme, the temperature control module comprises a heating wire control circuit, the heating wire control circuit comprises an MOS (metal oxide semiconductor) tube Q1, an MOS tube Q2, a resistor R13, a resistor R15 and a heating wire, and the D pole of the MOS tube Q1 is respectively connected with the heating wire, the battery and the D pole of the MOS tube Q2; the S pole of the MOS transistor Q1 and the S pole of the MOS transistor Q2 are connected with the ground wire; the G pole of the MOS transistor Q1 is connected with the G pole of the MOS transistor Q2, is connected with the single chip microcomputer through R3 and is connected with the S pole of the MOS transistor Q1 through R15.

On the basis of the technical scheme, the wind speed control module comprises a motor control circuit, the motor control circuit comprises a motor, a capacitor C16, a diode D3, an MOS transistor Q5, a resistor R14, a resistor R16, a resistor R2, a resistor R7, a resistor R10 and a capacitor C30, the capacitor C16 and the diode D3 are connected in parallel and then connected to the positive electrode and the negative electrode of the motor, the positive electrode of the motor is connected with a battery, and the negative electrode of the motor is connected with the D electrode of the MOS transistor Q5; the G pole of the MOS tube Q5 is connected with the PWN port of the singlechip through R14, and is also connected with the AD port of the singlechip and the capacitor C30 through R16 respectively; the output end of the capacitor C30 is connected with the ground wire; the S pole of the MOS transistor Q5 is connected with the ground wire through a resistor R2 and a resistor R7 respectively.

Compared with the prior art, the air temperature control method of the battery type hair drier provided by the invention has the following advantages: the battery detection circuit is used for acquiring current battery voltage real-time data, the temperature and the wind speed can be controlled within a preset range through a software algorithm, the problem that the hair surface feeling temperature is low when a battery type hair drier blows due to low heating power is solved, and the human body surface feels a state which is basically consistent before and after the touch of the wind temperature through real-time adjustment of the temperature and the wind speed. The effects of keeping the temperature constant and the wind speed adjusted continuously are achieved, and the electric quantity of the battery can be saved to increase the endurance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart illustrating the steps of a method for controlling a battery-type hair dryer according to the present invention;

FIG. 2 is a structural diagram of a battery-type blower apparatus according to the present invention;

FIG. 3 is a circuit diagram of a battery detection circuit provided by the present invention;

FIG. 4 is a circuit diagram of a heater wire control circuit provided by the present invention;

FIG. 5 is a circuit diagram of a motor control circuit provided by the present invention;

fig. 6 is a wind temperature graph according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The invention provides a control method of a battery type hair drier, which comprises S100, acquiring current battery voltage real-time data through a battery detection circuit; s200, reversely deducing a program to adjust a duty ratio value according to the acquired real-time battery voltage data and a set constant power value so as to achieve wind heating control of constant power; and S300, controlling the voltage values at two ends of the motor according to the acquired real-time battery voltage data and a set program regulation duty ratio value to achieve gradual change type wind speed regulation within a certain time.

In specific implementation, as shown in fig. 1, the control method of the battery type hair dryer includes S100, acquiring real-time data of the current battery voltage through a battery detection circuit because the voltage of a battery of the hair dryer is slowly reduced in the using process; s200, adjusting a duty ratio value by a reverse derivation program according to the acquired real-time battery voltage data and a set constant power value, and achieving constant-power wind heating control by adjusting the duty ratio value, so that the problem of unstable power of a battery type hair drier is solved, and a constant temperature can be acquired; and S300, controlling the voltage values at two ends of the motor according to the acquired real-time battery voltage data and a set program regulation duty ratio value to achieve gradual change type wind speed regulation within a certain time. The certain time can be defined as the time from the beginning of blowing to the completion of moisture evaporation, and can be adjusted according to actual requirements.

According to the control method of the battery type hair dryer, the current battery voltage real-time data is acquired by the battery detection circuit, and the temperature and the wind speed can be controlled within the preset range through the software algorithm, so that the problem that the hair surface feeling temperature is very low when the hair is blown due to low heating power of the battery type hair dryer is solved, and the human body surface feels a state which is basically consistent before and after the touch of the wind temperature by adjusting the temperature and the wind speed in real time. The effects of keeping the temperature constant and the wind speed adjusted continuously are achieved, and the electric quantity of the battery can be saved to increase the endurance.

Preferably, the constant power value and the gradual wind speed adjustment duty value are obtained according to the moisture content of the hair.

When the specific implementation is carried out, when moisture exists on the surface of initial hair, 1 g of water is vaporized to obtain required energy 2267 cokes, if the initial wind speed is high, the temperature of electric blowing air blowing to the surface of the hair is taken away, the utilization rate of effective heating power is reduced, and a human body feels cold; when the water is slowly evaporated, the heating power needs to be slowly reduced and the wind speed needs to be increased, so that the hair does not feel too hot in the drying process. Therefore, when the temperature and the wind speed are regulated, the constant power value and the gradual change type wind speed regulation duty ratio value need to be obtained according to the moisture content of the hair.

Preferably, the hair moisture content is estimated from the actual moisture evaporation time of the hair.

In particular, the moisture content of the hair is estimated based on the actual moisture evaporation time of the hair. In order to obtain the moisture evaporation time, a large number of experimental tests are required, the moisture evaporation time is obtained by measuring the time required for drying the hair under a set constant power state for multiple times, and the duty ratio value with uniform speed increase is obtained through the moisture evaporation time. And corresponding wind speed and temperature regulation can be obtained through the constant-speed regulation of the duty ratio value and the real-time battery voltage data.

As a preferred embodiment, the moisture evaporation time is set to 2 minutes, the current power value is 80W, the initial duty ratio value is 45%, and the final duty ratio value after moisture evaporation is 85%, and after the data is set, the wind speed and temperature of the blower are detected by a wind speed tester and a temperature polling instrument.

The following are the more suitable actual data tested at present: (duty ratio value/tuyere wind temperature/tuyere wind speed).

Through the data, as shown in fig. 6, a temperature curve (on line) at the air outlet of the blower and a temperature curve (off line) at the position of 10cm can be simulated, and the simulated curves can intuitively know that the temperature is higher at the beginning of blowing and gradually decreases within two minutes of moisture evaporation until the temperature tends to be stable. By adjusting the temperature and the air speed in real time, when the water content is high in the early stage of hair blowing, the temperature is high, the air speed is low, the electric hair drier provides heat which is larger than the heat absorbed by water evaporation, and the hair surface has a warm and moist touch feeling; after the water is evaporated, the temperature is lower, the wind speed is higher, the hair can not be scalded, and the temperature feeling on the surface of the hair is maintained. Finally, the experience that the human body surface feels the touch feeling of the wind temperature is basically consistent before and after the touch feeling is achieved.

Preferably, the duty cycle value is adjusted to achieve constant power wind heating control using the following equation (1) back-derived procedure;

K1＝Q*R/(VBAT)² (1)

wherein:

k1 is the actual adjusted duty cycle value, ranging between 0-1;

q is the constant heater wire power;

r is the fixed internal resistance of the heating wire;

VBAT is the current battery voltage value.

In specific implementation, the initial heating constant power value is set, after the battery detection circuit samples the battery voltage in real time, the calculation is carried out through the formula (1), the program regulation duty ratio value can be deduced, the heating control of the heating wire power is achieved through the program regulation duty ratio value, and finally the purpose of controlling the temperature of the hair dryer is achieved.

Preferably, the voltage value at two ends of the motor is obtained by using the following formula (2) to achieve gradual wind speed regulation within a certain time;

Vmoto＝VBAT*K2 (2)

wherein the content of the first and second substances,

k2 is the actual adjusted duty cycle value, ranging between 0-1;

vmoto is the current motor operating voltage;

VBAT is the current battery voltage value.

During specific implementation, voltage signals collected by the battery detection circuit are transmitted to the single chip microcomputer to form feedback, voltage values at two ends of the motor are calculated through the formula (2), the software processes and controls the voltage values at the two ends of the motor through an algorithm, the wind speed is adjusted, duty ratio values of different PWM waves are adjusted and output within a certain time, and therefore the effect of gradually adjusting the wind speed is achieved.

The invention also provides battery type blower equipment which comprises a blower body, wherein a temperature control module, a wind speed control module and a voltage acquisition module are arranged in the blower body;

the voltage acquisition module is used for acquiring the current battery voltage real-time data through the battery detection circuit;

the temperature control module is used for adjusting a duty ratio value through a reverse derivation program according to the acquired real-time battery voltage data so as to achieve wind heating control of constant power;

the wind speed control module is used for adjusting the duty ratio value according to the acquired real-time battery voltage data and a set program to control the voltage values at two ends of the motor so as to achieve gradual wind speed adjustment within a certain time.

In specific implementation, as shown in fig. 2, the battery type blower device comprises a blower body, a temperature control module, a wind speed control module and a voltage acquisition module are arranged in the blower body, the temperature control module and the wind speed control module output different adjustment duty ratio values through software algorithms according to current battery voltage data acquired by the voltage acquisition module, and then accurately control the heating temperature and the wind speed of the blower. Adopt foretell battery class hair-dryer equipment not only can make human hair surface can both experience comparatively mild unanimous wind temperature sense of touch in the earlier stage and the later stage of blowing, can save the electric quantity of battery again and increase the continuation of journey.

Preferably, the voltage acquisition module comprises a battery detection circuit, the battery detection circuit comprises a triode T3, a triode T4, a capacitor C23, a resistor R41, a resistor R42, a resistor R43, a resistor R25, a resistor R26 and a resistor R20, and a base of the triode T3 is connected with the single chip microcomputer through the resistor R44 and is also connected with an emitter of the triode T3 through the resistor R41; the emitting electrode of the triode is not only connected with the AD port of the singlechip through a capacitor C23, but also connected with the ground wire; the emitter of the triode T4 is not only connected with the battery, but also connected with the base of the triode T4 through a resistor R42, and the collector of the triode T4 is connected with the collector of the triode T3 through a resistor R43; the collector of the triode T4 is connected with one end of a resistor R26 and one end of a resistor R25 through a resistor R20, wherein the other end of the resistor R25 is connected with the ground wire, and the other end of the resistor R26 is connected with the AD port of the single chip microcomputer.

In specific implementation, as shown in fig. 3, the battery detection circuit is connected with the battery, the amplifier circuit is implemented through the triode, the AD acquisition is implemented through the AD port of the battery after voltage division is implemented through the R20 and the R25 resistors, and finally the AD acquisition is connected with the S-AD port of the single chip microcomputer and used for transmitting acquired signals to the single chip microcomputer, so that the effect of reversely calculating the voltage of the battery is achieved.

Preferably, the temperature control module comprises a heating wire control circuit, the heating wire control circuit comprises a MOS tube Q1, a MOS tube Q2, a resistor R13, a resistor R15 and a heating wire, and a D pole of the MOS tube Q1 is respectively connected with the heating wire, a battery and a D pole of the MOS tube Q2; the S pole of the MOS transistor Q1 and the S pole of the MOS transistor Q2 are connected with the ground wire; the G pole of the MOS transistor Q1 is connected with the G pole of the MOS transistor Q2, is connected with the single chip microcomputer through R3 and is connected with the S pole of the MOS transistor Q1 through R15.

In specific implementation, as shown in fig. 4, after the single chip microcomputer calculates the signal collected by the battery voltage detection circuit, PWM is output to the Heat port of the heating wire control circuit, so that the two MOS tubes are alternately conducted, and further, the heating wire is controlled, the MOS tubes not only play a role in filtering and stabilizing voltage, but also greatly reduce power consumption. On the other hand, the heating wire control circuit is also connected with a battery and used for providing power supply for the heating wire.

Preferably, the wind speed control module comprises a motor control circuit, the motor control circuit comprises a motor, a capacitor C16, a diode D3, a MOS transistor Q5, a resistor R14, a resistor R16, a resistor R2, a resistor R7, a resistor R10 and a capacitor C30, the capacitor C16 and the diode D3 are connected in parallel and then connected to the positive electrode and the negative electrode of the motor, the positive electrode of the motor is connected with a battery, and the negative electrode of the motor is connected with the D electrode of the MOS transistor Q5; the G pole of the MOS tube Q5 is connected with the PWN port of the singlechip through R14, and is also connected with the AD port of the singlechip and the capacitor C30 through R16 respectively; the output end of the capacitor C30 is connected with the ground wire; the S pole of the MOS transistor Q5 is connected with the ground wire through a resistor R2 and a resistor R7 respectively.

In specific implementation, as shown in fig. 5, after the single chip microcomputer calculates the signal collected by the battery voltage detection circuit, PWM is output to a Motor port of the Motor control circuit, and then the voltage at two ends of the Motor is controlled through a MOS transistor Q5, so that the wind speed is controlled. The diode D3 and the capacitor C16 are connected in parallel at two ends of the motor and used for protecting the circuit.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.