Control method of a portable fan

Abstract

The application discloses a control method of a portable fan, the portable fan comprising a control module, a driving module and a three-phase micro motor connected in sequence, the control method being applied to the control module, and the control method comprising the following steps: controlling the working voltage of the three-phase micro motor to be 2-18 volts, controlling the working current of the three-phase micro motor to be 0.1-10 amperes, and / or controlling the rated working power of the three-phase micro motor to be 0.5-100 watts; according to the control of the working voltage, the working current and / or the rated working power, controlling the rated working rotating speed of the three-phase micro motor through the driving module, so as to reduce the high rotating speed noise of the three-phase micro motor and control the wind speed to be in a preset wind speed interval. According to the technical scheme, the low-voltage driving technology and the accurate control strategy are adopted, so that the portability and use comfort of the fan are improved, and the overall performance and energy efficiency of the equipment are effectively improved.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and in particular to a control method for a portable fan. Background Technology

[0002] Users who have used portable fans know that portable fans have relatively slow motor speeds, limited wind speed and air volume, and relatively high vibration and noise, which makes it impossible for users to obtain the best comfort experience in different environments and with different needs.

[0003] Because existing motors generally use single-phase motors, three-phase micro motors, in contrast, can operate at speeds ranging from tens of thousands to hundreds of thousands of revolutions per minute (RPM). However, since these devices require powerful power, three-phase micro motors typically use AC mains power, with voltage ranging from 110V to 240V, to ensure stable high-speed output. Furthermore, the manufacturing cost of high-speed motors is relatively high, generally ranging from tens to hundreds of yuan. Therefore, the main application areas of three-phase micro motors include industrial equipment, power tools, aerospace, and automobiles. For example, machine tools in industrial equipment require the high-speed rotation of high-speed motors to improve production efficiency and machining accuracy, while automobiles require the high-speed rotation of high-speed motors to improve power output and fuel efficiency.

[0004] Prior to 2022, there was no precedent in the industry for applying three-phase micro motors to small portable fans. This was due to the high cost and high power consumption characteristics of high-speed motors, which did not meet the low cost and low power consumption requirements of small portable fans. Until 2023, the applicant first promoted the application of three-phase motors to portable fans, which was highly recognized by consumers at home and abroad, and at the same time drove the rapid development of the entire industry. However, since 2023, both the applicant's products and the imitations of competitors have used square waves for driving three-phase motors. Square wave driving has obvious technical defects, such as high noise and obvious vibration, and the sharp sound of the motor and its shaft is particularly noticeable. Therefore, the inventors of this application have been trying to solve the mixed noise problem of square wave driving.

[0005] Over a two-year period, the applicant and inventors conducted research across the entire motor industry, including leading companies like Dyson and Leifen, as well as Dongguan Air Cooling, Zhongqu Motor, Hengchi Motor, DJI Innovations, and Dechang Motor. Their findings revealed a significant deficiency in micro-motor research and development, particularly regarding motor noise. Micro-motor and control technologies have stagnated, especially in commercially available handheld vacuum cleaners and fans, which are noisy and have limited battery life (less than 20 minutes). Fans using three-phase motors produce a whistling sound that can be heard up to 100 meters away. Even with high-performance drones like those from DJI, the noise from airflow and motors during flight is undeniable. Clearly, the technology of three-phase motors in micro-motor applications urgently needs development, especially new application technologies for controlling the drive of three-phase motors in micro-motor systems. Summary of the Invention

[0006] This application provides a control method for a portable fan to solve the above-mentioned technical problems.

[0007] This application provides a control method for a portable fan. The portable fan includes a control module, a drive module, and a three-phase micro motor connected in sequence. The control method is applied to the control module and includes: The operating voltage of the three-phase micro motor is controlled to be 2 to 18 volts, the operating current of the three-phase micro motor is controlled to be 0.1 to 10 amps, and / or the rated operating power of the three-phase micro motor is controlled to be 0.5 to 100 watts; Based on the control of the operating voltage, the operating current and / or the rated operating power, the rated operating speed of the three-phase micro motor is controlled by the drive module to reduce the high-speed noise of the three-phase micro motor and control the wind speed within the preset wind speed range.

[0008] In some embodiments, the portable fan further includes an input module connected to the control module. The input module outputs a fan speed adjustment control signal according to user instructions. The drive module includes a first bridge arm, a second bridge arm, and a third bridge arm. Each bridge arm has an upper bridge arm switch and a lower bridge arm switch on either side of its midpoint. The midpoint of each bridge arm is connected to one phase coil of the three-phase micro motor. The control method further includes: Obtain the wind speed regulation control signal; The wind speed regulation control signal is converted into a PWM control signal; The switching transistors of each bridge arm are controlled by the PWM control signal to adjust the speed of the three-phase micro motor.

[0009] In some embodiments, controlling the switching transistors of each bridge arm via the PWM control signal to adjust the speed of the three-phase micromotor includes: The speed of the three-phase micro motor is controlled by controlling the on-time of the switching transistor of each bridge arm through the drive module based on the PWM control signal.

[0010] In some embodiments, the input module outputs a wind speed switch signal according to a user instruction, and the control method further includes: Obtain the switch signal; The switching signal is converted into a switching control signal; The switching control signal controls the switching transistor of each bridge arm to drive the three-phase micro motor to start or stop operating.

[0011] In some embodiments, controlling the switching transistors of each bridge arm via the switching control signal to drive the three-phase micro motor to start or stop operation includes: According to the switch control signal, the drive module turns on or off the switch tube of each bridge arm to drive the three-phase micro motor to start or stop running.

[0012] In some embodiments, when the input module is a voice module, the voice module is configured to capture the user's voice signal and convert the voice signal into the switch signal or the wind speed adjustment control signal.

[0013] In some embodiments, the input module is a touch module, which is configured to detect sliding parameters and generate the wind speed adjustment control signal; the conversion of the wind speed adjustment control signal into a PWM control signal includes: The duty cycle of the PWM signal is calculated based on the wind speed regulation control signal, and a PWM control signal is generated based on the duty cycle of the PWM signal.

[0014] In some embodiments, the sliding parameter is a sliding distance, which is obtained by calculating the distance between the starting position and the ending position after the touch module records the starting position when the user begins to slide on the touch area and the ending position when the user ends to slide on the touch area. The wind speed adjustment control signal is generated by the touch module based on the sliding distance of the user on the touch area. The step of calculating the duty cycle of the PWM signal based on the wind speed adjustment control signal includes: Based on the wind speed adjustment control signal, the sliding distance is compared with the maximum sliding distance to obtain the sliding distance ratio, wherein the maximum sliding distance is the predefined maximum distance that the user slides on the touch area; Based on the sliding distance ratio and the preset minimum and maximum values ​​of the PWM signal duty cycle, the corresponding PWM signal duty cycle is calculated.

[0015] In some embodiments, the sliding parameter is a sliding time, which is obtained by calculating the duration between the start and end times of the sliding action after recording the start and end times of the sliding action when the touch module detects the sliding action; the step of calculating the duty cycle of the PWM signal based on the wind speed adjustment control signal includes: When the touch module detects a sliding action, it records the start and end times of the sliding action to calculate the corresponding sliding time. Based on the wind speed regulation control signal, the sliding time is calculated to obtain the normalized sliding time; Based on the normalized sliding time, the corresponding PWM signal duty cycle is generated.

[0016] In some embodiments, the touch module may further be configured to detect the coordinates of the click position and use the coordinates of the click position as a click parameter to generate the wind speed adjustment control signal. The step of calculating the PWM signal duty cycle based on the wind speed adjustment control signal includes: Based on the wind speed adjustment control signal, determine the touch area corresponding to the click parameter; Based on the wind speed level corresponding to the touch area, the required PWM signal duty cycle is calculated; wherein, different touch areas correspond to different wind speed levels.

[0017] In some embodiments, the portable fan further includes a speed measurement module, which is connected to a three-phase micro motor and a control module respectively. The speed measurement module is used to measure the actual speed of the three-phase micro motor and send it to the control module. The control method further includes: The speed change is obtained based on the actual speed and the target speed, and the duty cycle of the PWM signal is adjusted according to the speed change.

[0018] In some embodiments, controlling the operating voltage of the three-phase micromotor to 2 to 18 volts includes: maintaining the operating voltage at 2 to 18 volts by boosting or bucking the voltage when a change in the operating voltage is detected; and / or, Controlling the operating current of the three-phase micromotor to 0.1 to 10 amps includes: when a change in the operating current is detected, maintaining the operating current at 0.1 to 10 amps by adjusting the PWM control signal; and / or, The step of controlling the rated operating power of the three-phase micro motor to be between 0.5 and 100 watts includes: when a change in the rated operating power is detected, maintaining the rated operating power to be between 0.5 and 100 watts by adjusting the operating voltage or the operating current.

[0019] In some embodiments, controlling the rated operating speed of the three-phase micro motor via the drive module based on the control of the operating voltage, the operating current, and / or the rated operating power includes: When the operating voltage is 6 to 8.4 volts, the operating current is 0.12 to 1 amp, and / or the rated operating power is 0.8 to 9 watts, the rated operating speed of the three-phase micro motor is controlled by the drive module to be 6000-15000 RPM; and / or, When the operating voltage is 5.9 to 8.4 volts, the operating current is 0.5 to 6 amps, and / or the rated operating power is 5 to 50 watts, the drive module controls the rated operating speed of the three-phase micro motor to be 20,000-80,000 RPM; and / or, When the operating voltage is 2 to 5.8 volts, the operating current is 0.25 to 2 amps, and / or the rated operating power is 1 to 8 watts, the drive module controls the rated operating speed of the three-phase micro motor to be 15000-41000 RPM; and / or, When the operating voltage is 8.5 to 12.6 volts, the operating current is 0.5 to 5 amps, and / or the rated operating power is 6 to 60 watts, the drive module controls the rated operating speed of the three-phase micro motor to be 25,000-85,000 RPM; and / or, When the operating voltage is 12 to 18 volts, the operating current is 0.1 to 1 amp, and / or the rated operating power is 2 to 16 watts, the rated operating speed of the three-phase micro motor is controlled by the drive module to be 2000-6000 RPM.

[0020] The technical effects of this application embodiment are as follows: The technical solution of this application embodiment, through low voltage drive technology and precise control strategy, not only improves the portability and user comfort of the fan, but also effectively improves the overall performance and energy efficiency of the device. This design solution is suitable for portable fan application scenarios that require high performance and low noise, and fills the gap in the market for the application of three-phase micro motors in small portable devices. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 2 This is another structural schematic diagram of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 3 This is another structural schematic diagram of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 4 This is a circuit diagram of a touch-sensitive sliding adjustment chip in a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 5 This is a circuit diagram of a touch screen connector in a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 6 This is a schematic diagram of the display interface of the control device in a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 7 This is a circuit diagram of a single-contact touch screen chip in a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 8 This is another structural schematic diagram of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 9 This is a schematic diagram of the structure of a voice module in a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 10 This is a circuit diagram of the voice acquisition module in the voice module of a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 11 This is a circuit diagram of the voice recognition module in the voice module of a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 12 This is a schematic diagram of the structure of the voice output module in the voice module of a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 13 This is a circuit diagram of the voice output module in the voice module of a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 14 This is another structural schematic diagram of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 15 This is another structural schematic diagram of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 16 This is a schematic diagram of the drive module in a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 17 This is a schematic diagram of the motor structure in a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 18 This is a circuit diagram of a drive module in a portable fan based on a three-phase micro motor, provided in Embodiment 1 of this application; Figure 19 This is another circuit diagram of a drive module in a portable fan based on a three-phase micro motor, as provided in Embodiment 1 of this application; Figure 20 This is another structural schematic diagram of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 21 This is an exploded view of an embodiment of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 22 This is an exploded view of another embodiment of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 23 This is an exploded view of the first part of the structure of another embodiment of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 24 This is a second part of the exploded structural view of another embodiment of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 25 This is a third exploded view of another embodiment of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 26 This is a schematic diagram of another implementation of a portable fan based on a three-phase micro motor provided in Embodiment 1 of this application; Figure 27 This is a flowchart of a portable fan control method provided in Embodiment 2 of this application.

[0023] The following is a comparison of some of the figure labels: 101. Input Module; 102. Control Module; 103. Drive Module; 104. Three-Phase Micro Motor; 105. Speed ​​Measurement Module; 106. Networking Module; 107. Cloud Server; 111. Touch Module; 112. Voice Module; 121. Voice Acquisition Module; 122. Voice Recognition Module; 123. Voice Output Module; 1131. Power Amplifier Module; 1132. Speaker; 201. Manual Switch Module; 202. None Line module; 203, atomizing module; 204, cooling module; 205, heating module; 206, lighting module; 207, oscillating module; 301, first upper bridge arm switch tube; 302, second lower bridge arm switch tube; 303, third upper bridge arm switch tube; 304, fourth lower bridge arm switch tube; 305, fifth upper bridge arm switch tube; 306, sixth lower bridge arm switch tube; 311, first coil; 312, second coil; 313, third coil. Detailed Implementation

[0024] To fully understand this application, detailed structures and steps will be presented in the following description to illustrate the technical solutions proposed in this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0025] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0031] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0032] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0033] Example 1: Embodiment 1 of this application provides a portable fan that solves the problem in the prior art where mechanical switches prevent users from adjusting the fan speed to any desired level, resulting in a poor user experience.

[0034] Embodiment 1 of this application provides a portable fan based on a three-phase micro motor, such as... Figure 1As shown, the system includes: a control module 102, a drive module 103, and a three-phase micro motor 104. The three-phase micro motor 104 has an operating voltage of 2 to 18 volts, an operating current of 0.1 to 10 amps, and / or a rated operating power of 0.5 to 100 watts. The control module 102 controls the rated operating speed of the three-phase micro motor 104 through the drive module 103 according to the operating voltage, operating current, and / or rated operating power, so as to reduce the high-speed noise of the three-phase micro motor 104 and control the wind speed within a preset wind speed range.

[0035] This technical solution utilizes the coordinated operation of the control module 102 and the drive module 103 to achieve low-voltage drive of a three-phase micro motor, meeting the specific needs of a portable fan. This requires adjusting the number of slots and pole pairs to adapt to low-voltage operation, selecting high-performance core materials to reduce magnetic losses and improve efficiency under low voltage, and installing a high-efficiency inverter to convert low-voltage DC power into three-phase AC power, ensuring power supply stability and preventing voltage fluctuations from affecting motor performance.

[0036] The three-phase micro motor 104 features an operating voltage range of 2 to 18 volts, an operating current range of 0.1 to 10 amps, and a rated power range of 0.5 to 100 watts. Its design enables it to provide more efficient speed and power output than existing portable fan motors at low voltages, making it suitable for portable devices. The control module 102 precisely controls the three-phase micro motor 104 based on real-time monitoring of the operating voltage, operating current, and rated power. By adjusting the power supply parameters of the three-phase micro motor 104, the control module 102 effectively reduces noise generated during high-speed motor operation. The control module 102 can also adjust the fan speed to a preset range, ensuring user comfort and device stability compared to single-phase low-speed motors. The drive module 103 connects the control module 102 and the three-phase micro motor 104, converting the instructions from the control module 102 into actual motor drive signals. The drive module 103 uses high-efficiency inverter technology to convert low-voltage DC power into AC power suitable for the three-phase micro motor 104, ensuring efficient operation of the motor. Under different working conditions, the drive module 103 adjusts the speed and output power of the three-phase micro motor 104 according to the instructions from the control module 102.

[0037] The technical advantages of this embodiment are as follows: By combining the control module, drive module and three-phase micro motor, this technical solution provides a high-efficiency, low-noise, adjustable-speed portable fan solution. Through low-voltage drive technology and precise control strategy, it not only improves the portability and user comfort of the fan, but also effectively enhances the overall performance and energy efficiency of the device. This design is suitable for portable fan application scenarios that require high performance and low noise, filling the gap in the market for the application of three-phase micro motors in small portable devices.

[0038] The specific applications of this embodiment one include, but are not limited to, the following implementation methods: In one implementation, the three-phase micro motor 104 has an operating voltage of 6 to 8.4 volts, an operating current of 0.12 to 1 amp, and / or a rated operating power of 0.8 to 9 watt-hours. The control module 102 controls the rated operating speed of the three-phase micro motor 104 to 6000-15000 RPM via the drive module 103 based on the operating voltage, operating current, and / or rated operating power.

[0039] The three-phase micro motor 104 is driven by a voltage range of 6-8.4V, suitable for power supply by two batteries in series. Its operating current range is 0.12-1A, ensuring stable operation at different speeds. The power range is 0.8W-9W, meeting the power requirements of a portable fan. The control module 102 monitors the motor's operating voltage, current, and power in real time and adjusts accordingly. The control module 102 can precisely control the speed of the three-phase micro motor 104, with an adjustment range of 6000-15000 RPM. The drive module 103 converts the 6-8.4V DC power into three-phase AC power and drives the three-phase micro motor 104 through inverter technology. Two batteries are used in series to provide a stable voltage. The fan has 4 pole pairs, 12 slots, 5 blades, and 6 guide vanes / impellers.

[0040] In one implementation, the three-phase micro motor 104 has an operating voltage of 5.9 to 8.4 volts, an operating current of 0.5 to 6 amps, and / or a rated operating power of 5 to 50 watt-hours. The control module 102 controls the rated operating speed of the three-phase micro motor 104 to be 20,000-80,000 RPM via the drive module 103 based on the operating voltage, operating current, and / or rated operating power.

[0041] The three-phase micro motor 104 is driven by a voltage range of 5.9-8.4V, which can be 5.9V, 6.0V, 6.5V, 7.2V, ..., 8.4V. It is suitable for power supply by two batteries in series, with an operating current range of 0.5-6A to ensure stable operation at different speeds. The power range is 5W-50W, meeting the power requirements of a portable fan. The control module 102 monitors the motor's operating voltage, current, and power in real time and adjusts them accordingly. The control module 102 can precisely control the speed of the three-phase micro motor 104, with an adjustment range of 20000-80000 RPM. The drive module 103 converts the 5.9-8.4V DC power into three-phase AC power and drives the three-phase micro motor 104 through inverter technology. Two batteries are used in series to provide a stable voltage. The fan has one pair of poles, six slots, 13 blades, and six guide vanes / impellers.

[0042] In one implementation, the three-phase micro motor 104 has an operating voltage of 2 to 5.8 volts, an operating current of 0.25 to 2 amps, and / or a rated operating power of 1 to 8 watt-hours. The control module 102 controls the rated operating speed of the three-phase micro motor 104 to be 15,000-41,000 RPM via the drive module 103 based on the operating voltage, operating current, and / or rated operating power.

[0043] The three-phase micro motor 104 is driven by a voltage range of 2-5.8V, which can be 2V, 2.1V, 2.5V, 3.7V, ..., 4.3V, or 5.8V. It is suitable for power supply by two batteries in series, with an operating current range of 0.25-1.8A to ensure stable operation at different speeds. Its power range is 1W-8W, meeting the power requirements of a portable fan. The control module 102 monitors the motor's operating voltage, current, and power in real time and adjusts accordingly. The control module 102 can precisely control the speed of the three-phase micro motor 104, with an adjustment range of 15000-41000 RPM. The drive module 103 converts the 2-5.8V DC power into three-phase AC power and drives the three-phase micro motor 104 through inverter technology. Two batteries are used in series to provide a stable voltage. The fan has 4 pole pairs, 9 slots, 9 blades, and 7 guide vanes / impellers.

[0044] In one implementation, the three-phase micro motor 104 has an operating voltage of 8.5 to 12.6 volts, an operating current of 0.5 to 5 amps, and / or a rated operating power of 6 to 60 watt-hours. The control module 102 controls the rated operating speed of the three-phase micro motor 104 to be 25,000-85,000 RPM via the drive module 103 based on the operating voltage, operating current, and / or rated operating power.

[0045] The three-phase micro motor 104 is driven by a voltage range of 8.5-12.6V, which can be 8.5V, 9.0V, 10.5V, 12.0V, ..., 12.6V. It is suitable for power supply by three batteries in series, with an operating current range of 0.5-5A to ensure stable operation at different speeds. The power range is 6W-60W, meeting the power requirements of a portable fan. The control module 102 monitors the motor's operating voltage, current, and power in real time and adjusts them accordingly. The control module 102 can precisely control the speed of the three-phase micro motor 104, with an adjustment range of 25000-85000 RPM. The drive module 103 converts the 8.5-12.6V DC power into three-phase AC power and drives the three-phase micro motor 104 through inverter technology. The battery uses three batteries in series to provide a stable voltage. The fan has one pair of poles, six slots, 13 blades, and six guide vanes / impellers.

[0046] In one implementation, the three-phase micro motor 104 has an operating voltage of 12 to 18 volts, an operating current of 0.1 to 1 amp, and / or a rated operating power of 2 to 16 watt-hours. The control module 102 controls the rated operating speed of the three-phase micro motor 104 to be 2000-6000 RPM via the drive module 103 based on the operating voltage, operating current, and / or rated operating power.

[0047] The three-phase micro motor 104 is driven by a voltage range of 12-18V, which can be 12V, 12.5V, 14V, 16.8V, ..., 18V. It is suitable for power supply by four batteries in series, with an operating current range of 0.1-1A to ensure stable operation at different speeds. The power range is 2W-16W, meeting the power requirements of a portable fan. The control module 102 monitors the motor's operating voltage, current, and power in real time and adjusts them accordingly. The control module 102 can precisely control the speed of the three-phase micro motor 104, with an adjustment range of 2000-6000 RPM. The drive module 103 converts the 12-16.8V DC power into three-phase AC power and drives the three-phase micro motor 104 through inverter technology. The battery uses four batteries in series to provide a stable voltage. The fan has 4 pole pairs, 6 slots, 9 blades, and 10 guide vanes / impellers.

[0048] As one implementation method, this embodiment provides a portable fan, such as... Figure 2As shown, the system includes: an input module 101, a control module 102, a drive module 103, and a three-phase micro motor 104 connected in sequence. The drive module 103 includes a first bridge arm, a second bridge arm, and a third bridge arm. Each bridge arm has an upper bridge arm switch and a lower bridge arm switch on both sides of its midpoint. The midpoint of each bridge arm is connected to one phase coil of the three-phase micro motor 104. The input module 101 outputs a wind speed adjustment control signal according to the user's instructions. The control module 102 generates a PWM control signal according to the wind speed adjustment control signal and controls the switch of each bridge arm through the PWM control signal to adjust the speed of the three-phase micro motor 104.

[0049] The input module 101 also outputs a switch signal according to the user's instructions. The control module 102 generates a switch control signal according to the switch signal and controls the switch tube of each bridge arm through the switch control signal to drive the three-phase micro motor 104 to start or stop running.

[0050] When the user's command is to turn on the fan, the input module 101 outputs a switch signal according to the user's command. When the user's command is to adjust the fan speed, the input module 101 outputs a fan speed adjustment control signal according to the user's command. The user can input control commands in various ways depending on the type of input module 101. For example, the input module 101 can input commands via touch, voice, or other input methods. When the input module 101 is a touch module 111, it generates a switch signal when it detects a touch action, and it generates a fan speed adjustment control signal when it detects a swipe action. When the input module 101 is a voice module 112, it captures the user's voice signal and converts it into a switch signal and a fan speed adjustment control signal. When the input module 101 is a network module 106, it receives remote control signals or fan speed adjustment parameters set by the user. The input module 101 can also be a multi-functional input module, enabling various functions such as timer control, light control, oscillation control, mist control, and cooling control. The timer function allows users to set the on / off time via the touch module 111, or remotely set the timer via the voice module 112 and network module 106. Lighting control allows users to adjust the light's on / off status, brightness, and color via the touch module 111, or remotely control the lights via the voice module 112 and network module 106. The oscillation function allows users to set the fan's oscillation angle and speed via the touch module 111, or remotely control the oscillation function via the voice module 112 and network module 106. The misting function allows users to turn on or adjust the mist volume via the touch module 111, or remotely control the misting function via the voice module 112 and network module 106. The cooling function allows users to adjust the fan's cooling intensity via the touch module 111, or remotely control the cooling function via the voice module 112 and network module 106. The input module enables multiple function controls, allowing users to use and adjust the fan more flexibly to meet different usage scenarios.

[0051] The input module 101 and the control module 102 are connected by wired or wireless means, and the input module is located on the portable fan housing or other electronic devices.

[0052] The input module 101 and the control module 102 are connected via wired connections, such as through I2C, SPI, UART, GPIO, USB, CAN bus, I2S, or ADC interfaces. I2C (Inter-Integrated Circuit) is a serial communication protocol commonly used to connect low-speed peripherals (such as touch modules) to the motherboard, using two wires (SDA and SCL) for data transmission and clock synchronization. SPI (Serial Peripheral Interface) is a high-speed synchronous serial communication protocol, using four wires (MISO, MOSI, SCK, and SS) for data transmission. UART (Universal Asynchronous Receiver-Transmitter) is an asynchronous serial communication protocol, using two wires (Tx and Rx) for data transmission. GPIO (General-Purpose Input / Output) is a general-purpose digital signal input / output interface that can be configured for input or output modes. The USB (Universal Serial Bus) interface is a universal high-speed serial communication interface that supports plug-and-play and hot-swapping. The CAN (Controller Area Network) bus is a serial communication protocol for industrial automation, featuring high reliability and real-time performance. The I2S (Integrated Interchip Sound) interface is a serial bus standard for audio data transmission. The ADC (Analog-to-Digital Converter) interface converts analog signals to digital signals. Signal transmission between the input module 101 and the control module 102 is achieved through wireless communication technologies such as Wi-Fi, Bluetooth, and Zigbee. The input module 101 is directly integrated into the portable fan's housing, suitable for situations where users wish to operate the fan directly, such as adjusting fan speed via a touchscreen or turning the fan on / off via buttons. The input module 101 can also be detached from the portable fan and installed on other electronic devices (such as smartphones, tablets, smartwatches, etc.), connecting wirelessly to the fan's control module, making the portable fan control more flexible and convenient, allowing users to remotely control it using existing electronic devices. The wireless module can be a Bluetooth module, a Wi-Fi module, an infrared module, a 433MHz wireless module, or the following wireless modules: Zigbee module, Z-Wave module, LoRa (Long Range) module, NFC (Near Field Communication), a 2.4GHz dedicated wireless module, 5G, etc.The control module 102 receives signals from the input module 101 and processes them. It generates a switch control signal based on the switch signal to control the start and stop of the three-phase micro motor 104. It also calculates a control signal to adjust the portable fan based on the fan speed control signal. This control signal includes, but is not limited to, PWM (Pulse Width Modulation), PPM (Pulse Position Modulation), data protocols, or other custom protocols. PWM is a commonly used control method that adjusts the speed of the three-phase micro motor 104 by changing the duty cycle (the ratio of high-level time to the period). PPM transmits information by changing the position of the pulse within a period. The data protocol can be a standard communication protocol (such as I2C, SPI, UART) or a custom communication protocol for transmitting more complex control commands. Custom protocols are designed with specific control signal formats and transmission methods according to specific application requirements. If the input module 101 is a voice module 112, the control module 102 generates the switch control signal and PWM control signal based on the switch signal and fan speed control signal. If the input module 101 is a network module 106, the control module 102 generates the corresponding control signal based on the remote control signal. The drive module 103 consists of three bridge arms, each including an upper bridge arm switch and a lower bridge arm switch, connected to the phase coils of the three-phase micromotor 104. The control module 102 controls the switch of each bridge arm via a switch control signal, causing the three-phase micromotor 104 to start or stop. A PWM control signal controls the switch of each bridge arm to adjust the speed of the three-phase micromotor 104. The start, stop, and speed of the three-phase micromotor 104 can be controlled using a six-step commutation method, where only two MOSFETs are conducting at any given time, forming an effective current path to drive the three-phase micromotor 104. By controlling the three bridge arms (each with two MOSFETs), six commutation states are achieved to drive the three-phase micromotor 104, with each commutation state corresponding to a pair of conducting MOSFETs, and the remaining MOSFETs remaining off. The three-phase micromotor 104 receives the signal from the drive module 103, starts operating, and provides the corresponding wind speed.

[0053] The technical advantage of this embodiment is that, through the switch signal and wind speed adjustment control signal output by the input module, the control module can generate switch control signal and PWM control signal, allowing users to adjust the fan's operating status and wind speed as needed, achieving flexible wind speed adjustment. Compared with the traditional mechanical switch method, this technical solution allows users to select the appropriate wind speed according to specific needs, enhancing the convenience and comfort of use and improving the user experience.

[0054] As one implementation method, such as Figure 3As shown, when the input module 101 is a touch module 111, the touch module 111 outputs a switch signal when it detects a touch action, and the control module 102 generates a switch control signal based on the switch signal; when the touch module 111 detects a sliding action, it outputs a wind speed adjustment control signal, and the control module 102 calculates the duty cycle of the PWM signal based on the wind speed adjustment control signal, and generates a PWM control signal based on the PWM signal duty cycle.

[0055] The touch module 111 detects the user's touch and swipe actions. When the user touches the touch module 111, the touch module 111 detects the touch action and generates a switch signal. When the user swipes on the touch module 111, the touch module 111 detects the swipe parameters and generates a wind speed adjustment control signal. The control module 102 receives and processes the switch signal, generating a switch control signal to control the start and stop of the three-phase micro motor 104. The control module 102 receives and processes the wind speed adjustment control signal, calculating the required PWM signal duty cycle based on the wind speed adjustment control signal.

[0056] The control module 102 calculates the duty cycle of the PWM signal using different calculation methods depending on the sliding parameters. The sliding parameters may include the following: sliding distance: the distance the user slides their finger on the touch area; sliding speed: the speed at which the user slides their finger; sliding direction: the direction in which the user slides their finger (such as up and down, left and right); sliding position: the starting and ending positions of the user's finger on the touch area.

[0057] Specifically, the wind speed adjustment control signal, with the sliding distance as the main parameter, can be generated by the touch module based on the user's sliding distance on the touch area. The specific steps for calculating the duty cycle are as follows: The touch module records the user's starting position when they begin to slide on the touch area and the ending position when they finish. The sliding distance is then calculated by measuring the distance between these two positions. For example, if the starting position is P1 and the ending position is P2, the sliding distance D can be expressed as: D = P2 - P1. The maximum possible sliding distance on the touch area is predefined as the maximum sliding distance Dmax. Based on the wind speed control signal, the actual sliding distance D is compared with the maximum sliding distance Dmax to calculate the sliding distance percentage R, ensuring R is between 0 and 1. The minimum and maximum values ​​of the PWM signal duty cycle are set. For example, the minimum value is 0%, and the maximum value is 100%. Based on the sliding distance percentage and the preset minimum and maximum values ​​of the PWM signal duty cycle, the corresponding PWM signal duty cycle is calculated. The generated PWM control signal is sent to the drive module 103 according to the duty cycle of the PWM signal, and the speed of the three-phase micro motor 104 is adjusted to realize the change of wind speed.

[0058] The specific steps for calculating the duty cycle, using the sliding time as the main parameter, are as follows: When a user slides on the touch panel, i.e., when the touch module 111 detects the sliding action, it records the start and end times of the sliding action, calculates the duration between the start and end times, and obtains the corresponding sliding time. The touch module 111 transmits the sliding time to the control module 102. The control module 102 calculates the sliding time based on the wind speed adjustment control signal to obtain a normalized sliding time, and generates a corresponding PWM signal duty cycle based on the normalized sliding time. The control module 102 sends the PWM signal to the drive module 103. The drive module 103 controls the speed of the three-phase micro motor 104 by adjusting the switching frequency and duty cycle of the switching transistor.

[0059] The specific steps for calculating the duty cycle, using the click position as the main parameter, are as follows: When a user clicks on a location on the touch module 111, the touch module 111 detects the coordinates of the clicked location (such as X and Y coordinates). The touch module 111 uses these coordinates as click parameters to generate a wind speed adjustment control signal. Depending on the area corresponding to the clicked location, the control module 102 calculates the required PWM signal duty cycle. For example, the touchable area of ​​the touch module 111 can be divided into multiple touch areas, each corresponding to a different wind speed level. Assuming the touchable area of ​​the touch module 111 is divided into five equally divided touch areas, clicking each touch area corresponds to a wind speed level: touch area 1 (leftmost) is low wind speed, touch area 2 (middle) is medium wind speed, and touch area 5 (rightmost) is high wind speed. When the user clicks the rightmost touchable area (i.e., touch area 5), ​​the touch module 111 detects the clicked location coordinates (i.e., the click parameters) and generates the corresponding wind speed adjustment control signal. The control module 102 receives the wind speed adjustment control signal and, based on the signal, determines the touch area (i.e., touch area 5) corresponding to the click parameter. Based on the wind speed setting (i.e., high wind speed setting) corresponding to the touch area, it calculates the PWM signal duty cycle required for the high wind speed setting. The control module 102 generates a PWM control signal and sends it to the drive module 103. The drive module 103 adjusts the speed of the three-phase micro motor 104 to the high wind speed setting by controlling the conduction time of the upper and lower bridge arm switches.

[0060] In one implementation, the touch module 111 can employ a touch-sensitive sliding adjustment chip. This chip contains multiple contacts, and when a user operates the fan via the touchscreen, the touch-sensitive sliding adjustment chip detects the touch action through these contacts. If pressure from the touch action is detected, the touch module 111 generates a switching signal. The touch-sensitive sliding adjustment chip transmits the switching signal to the control module 102. Upon receiving the switching signal, the control module 102 generates a switching control signal to control the switching transistor in the drive module 103, thereby starting or stopping the three-phase micro-motor 104, i.e., turning the fan on or off. In addition to detecting touch actions, the touch-sensitive sliding adjustment chip can also detect the user's sliding parameters on the touchscreen, including sliding gesture, sliding distance, sliding speed, number of slidings, and sliding time. These parameters are transmitted to the control module 102 via the touch module 111. The control module 102 generates corresponding PWM control signals according to preset logic, thereby adjusting the wind speed of the portable fan. The control module 102 generates corresponding PWM control signals according to the sliding parameters. The PWM control signals are used to control the switching transistor in the drive module 103 to adjust the speed of the three-phase micro motor 104, thereby achieving wind speed adjustment.

[0061] The touch-sensitive sliding adjustment chip has multiple contact points. When a user touches and slides on these points, the chip detects the touch action and sliding parameters (such as sliding distance and speed). These parameters reflect the user's desired adjustment of the fan speed. Based on these parameters, the chip generates a fan speed control signal. Upon receiving this signal, the control module calculates the duty cycle of the corresponding PWM signal. A higher duty cycle results in a higher motor speed, and a lower duty cycle results in a lower motor speed. The control module sends the generated PWM signal to the drive module, which controls the speed of the three-phase micromotor 104. By adjusting the duty cycle of the PWM signal, precise control of the motor speed is achieved, thereby adjusting the fan speed.

[0062] As an example, such as Figure 4 As shown, U5 is a touch chip. The pins PA0 to PA4 of the touch chip U5 can be connected to the control module 102 through the above connection method. The touch chip U5 includes at least contact points K2, K3, K4, K5, K6 and K7. Each contact point can detect touch actions. Different contact points can be combined to detect sliding gestures, sliding distance, sliding speed, number of sliding times and sliding time and other sliding parameters.

[0063] The technical advantages of this implementation are as follows: Compared to traditional portable fans that only have a single mechanical switch to control the speed, the touch module enables more diverse control methods. Users can not only turn the fan on and off with a simple touch, but also flexibly adjust the fan speed through sliding operations. The application of the touch-sliding adjustment chip makes fan operation more convenient and intuitive. Users no longer need to repeatedly press the mechanical switch; they can easily control the fan's on / off state and fan speed simply by touching and sliding, improving user efficiency and user experience. The control module generates a precise PWM control signal based on the detected sliding parameters, enabling precise control of the fan speed. Users can flexibly adjust the fan speed as needed for a more comfortable user experience.

[0064] As a second implementation of the touch module 111, the touch module 111 can be a touch screen chip, including single-channel touch, multi-channel touch, touch screen, etc. The touch sliding screen chip includes a switch area and a sliding area. The touch sliding screen chip generates a switch touch signal through the switch area and generates a corresponding wind speed adjustment control signal when the sliding parameter is detected through the sliding area.

[0065] The portable fan's touch control module 111 uses a touchscreen chip, which includes a switch area and a sliding area. When a user touches the switch area, the touchscreen chip detects the touch action and generates a switch signal. When the user slides in the sliding area, the touchscreen chip detects the sliding parameters and generates a corresponding fan speed adjustment control signal. The touch control module 111 sends the generated switch signal and fan speed adjustment control signal to the control module 102. Upon receiving the switch signal, the control module 102 generates a switch control signal, which controls the switching transistors of each bridge arm to start or stop the motor. Upon receiving the fan speed adjustment control signal, the control module 102 generates a PWM control signal, which controls at least one switching transistor in each bridge arm to adjust the speed of the three-phase micro motor 104, thereby achieving fan speed adjustment.

[0066] As an example, such as Figure 5 As shown, pins 5 to 9 of the touchscreen connector P2 are connected to the touchscreen, and pins 12 to 15 of the touchscreen connector P2 can be connected to the control module 102 using the above connection method. Figure 6 As shown, a control interface is displayed on the mobile terminal screen. The control interface includes a power button, a speed adjustment button, a timer shutdown button, an air purification button, an ambient light button, and a fan malfunction reminder. Different functions are achieved by clicking the buttons. This is only an example and is not intended to limit this application.

[0067] The technical advantages of this embodiment are as follows: Through the touch screen chip, users can easily control the fan's on / off state and adjust the fan speed. The operation is simple and intuitive, meeting various user needs. The touch screen chip can achieve flexible on / off and fan speed adjustment through the detection of the switch area and the sliding area. Users can precisely control the fan speed as needed, providing a more comfortable user experience. The use of the touch screen enhances the technological and modern feel of the portable fan, improves the user experience, and makes the product more competitive in the market.

[0068] As a third implementation of the touch module 111, the touch module 111 includes multiple single-contact touch chips connected in parallel. When the touch module 111 detects a touch action through any one of the touch points, it generates a switch touch signal, and when it detects sliding parameters through multiple touch points, it generates a corresponding wind speed adjustment control signal.

[0069] The portable fan's touch control module 111 includes multiple single-contact touch chips or a multi-channel touch chip integrated into one chip. When a user touches any single-contact touch chip, the chip generates a switch signal. When the user slides on the touch screen, the multiple single-contact touch chips detect the sliding parameters and generate corresponding wind speed adjustment control signals. The touch control module 111 sends the generated switch touch signals and wind speed adjustment control signals to the control module 102. Upon receiving the switch touch signals, the control module 102 generates a conduction level signal, which controls the switching transistors of each bridge arm to start or stop the motor. Upon receiving the wind speed adjustment control signal, the control module 102 generates a PWM control signal, which controls at least one switching transistor in each bridge arm to adjust the speed of the three-phase micro motor 104, thereby achieving wind speed adjustment.

[0070] As an example, such as Figure 7 As shown, U3 is a single-contact touch chip. The single-contact touch chip U3 is connected to the control module 102 through pin 1 and resistor R10. Pin 3 of the single-contact touch chip U3 is connected to a contact K1 through resistor R11. The above functions can be achieved by connecting multiple single-contact touch chips in parallel.

[0071] The technical advantages of this implementation are as follows: Through multiple parallel single-contact touch chips, users can easily control the fan's on / off state and adjust the fan speed, making operation simple and intuitive, and meeting various user needs. The touch-sensitive sliding adjustment chip, through the detection of multiple single contacts, enables flexible fan speed adjustment, allowing users to precisely control the fan speed as needed, providing a more comfortable user experience. The use of a touchscreen enhances the portable fan's technological and modern feel, improves the user experience, and makes the product more competitive in the market.

[0072] As one implementation method, such as Figure 8 As shown, when the input module 101 is the voice module 112, the voice module 112 captures the user's voice signal and converts the voice signal into a switch signal and a wind speed adjustment control signal. The control module 102 generates a switch control signal and a PWM control signal according to the switch signal and the wind speed adjustment control signal, respectively.

[0073] The user issues voice commands via voice module 112, such as "turn on the fan," "turn off the fan," or "increase the fan speed." The microphone of voice module 112 captures the user's voice signal. Voice module 112 transmits the captured voice signal to voice recognition unit, which converts the voice signal into corresponding on / off signals and fan speed adjustment control signals. Voice module 112 then sends these signals to control module 102. Control module 102 generates corresponding control signals based on the on / off and fan speed adjustment control signals: if the command is "turn on the fan" or "turn off the fan," the command corresponds to an on / off signal, and control module 102 generates an on / off control signal; if the command involves fan speed adjustment (e.g., "increase the fan speed"), the command corresponds to a fan speed adjustment control signal, and control module 102 generates a PWM control signal. Control module 102 uses the on / off control signal to control the switching transistor in drive module 103, driving the three-phase micro motor 104 to start or stop. Control module 102 adjusts the duty cycle of the PWM signal based on the fan speed adjustment control signal to generate the corresponding PWM control signal. The control module 102 sends the PWM control signal to the drive module 103, and controls the speed of the three-phase micro motor 104 by adjusting the switching frequency and duty cycle of the upper or lower bridge arm switching transistor.

[0074] The technical advantages of this embodiment are: users can easily control the portable fan by voice commands without manually operating the mechanical switch or touch panel, making operation more convenient. By controlling the speed of the three-phase micro motor 104 through PWM signal, the stability and accuracy of wind speed adjustment are ensured, allowing users to obtain a better user experience.

[0075] Regarding the voice module 112, as one implementation method, such as Figure 9 As shown, the voice module 112 includes a voice acquisition module 121, a voice recognition module 122, and a voice output module 123. The voice recognition module 122 is connected to the voice acquisition module 121, the voice output module 123, and the control module 102. The voice acquisition module 121 captures the user's voice signal, and the voice recognition module 122 converts the voice signal into a switch signal and a wind speed adjustment control signal and sends them to the control module 102. The voice recognition module 122 also controls the voice output module 123 to output or not output the execution result based on the feedback result of the control module 102.

[0076] The voice acquisition module 121, typically composed of a microphone, is responsible for capturing the user's voice signal and converting the user's voice input into an electrical signal. The voice recognition module 122 converts the captured voice signal into a switching signal and a wind speed control signal. Using voice recognition algorithms and techniques, it processes the voice signal into recognizable signal commands, which can be parsed and executed by the subsequent control module 102. Specifically, the voice recognition module 122 preprocesses the captured voice signal, including signal amplification, filtering, and noise reduction, to ensure the accuracy and stability of subsequent processing. The preprocessed voice signal is converted into a digitized feature vector. This step can use techniques such as MFCC (Mel Frequency Cepstral Coefficients) to extract features from the voice signal. A voice recognition model is trained based on a large amount of labeled voice data. Commonly used techniques include Hidden Markov Models (HMMs) and deep learning models (such as Recurrent Neural Networks (RNNs) and Long Short-Term Memory Networks (LSTMs)). The feature vectors are input into the voice recognition model for recognition and decoding, and the model maps the feature vector sequence into a command sequence. The decoded commands are then output. The voice prompts can indicate whether the fan is on or off, for example: 0x01 for "fan on" and 0x02 for "fan off". Voice prompts can also indicate fan speed adjustments, for example: 0x03 for "increase fan speed" and 0x04 for "decrease fan speed". Voice prompts can also specify a fan speed level, directly setting the speed level. For example: 0x10 for "low speed", 0x11 for "medium speed", and 0x12 for "high speed". Furthermore, other text can be used to replace the above instructions for "fan on", "fan off", "increase fan speed", and "decrease fan speed". The signals output by the voice module 112 can be single-byte or multi-byte data packets, depending on the complexity of the instructions and the system design. For example: a single-byte signal can be 0x01 (indicating fan on), and a multi-byte signal can be 0x01 0x02 (indicating fan on and set to the second fan speed).

[0077] As an example, when a user says "Turn on the fan," the voice module 112 recognizes the command and generates signal 0x01, which is then sent to the control module 102. When the user says "Increase the fan speed," the voice module 112 recognizes the command and generates signal 0x03, which is also sent to the control module 102. When the user says "Set the fan speed to medium," the voice module 112 recognizes the command and generates signal 0x11, which is then sent to the control module 102.

[0078] As an example, such as Figure 10 and Figure 11As shown, the voice acquisition module 121 includes a microphone (MIC), resistors R23 and R24, capacitors C27 and C28. The first terminal of the microphone (MIC) is connected to the second terminals of resistors R24 and R27, respectively. The second terminal of the microphone (MIC) is connected to the second terminals of resistors R23 and R28, respectively. The voice recognition module 122 includes a voice recognition chip U1. Pin 1 of the voice recognition chip U1 is connected to one end of capacitor C21. Pin 2 of the voice recognition chip U1 is connected to one end of capacitor C20 and one end of resistor R20, respectively. The other end of capacitor C20 is connected to ground along with the anode of Zener diode D1. Resistor R20... The other end is connected to the cathode of the Zener diode D1 at a high level. Pin 3 of the voice recognition chip U1 is connected to one end of capacitor C24. Pin 4 of the voice recognition chip U1 is connected to one end of capacitor C25. Pin 5 of the voice recognition chip U1 is connected to ground along with the other ends of capacitors C24 and C25. Pin 24 of the voice recognition chip U1 is connected to the same level along with one end of capacitors C22, C23, and C21. Pin 23 of the voice recognition chip U1 is connected to the other end of capacitor C22. Pin 22 of the voice recognition chip U1 is connected to the other end of capacitor C23. Pins 22, 21, and 20 of the voice recognition chip U1 are connected to A1, A2, and A3 of the voice acquisition module 121, respectively.

[0079] The circuit works as follows: the microphone (MIC) collects the user's voice input, capacitors C27 and C28 convert the user's voice input into electrical signals and output them to the voice recognition chip U1, and the voice recognition chip U1 converts the captured voice signals into switching signals and wind speed adjustment control signals.

[0080] The technical advantages of this implementation are as follows: By using voice input and output, the user interactivity and user-friendliness of the device are improved, allowing users to easily control the fan's start, stop, and speed adjustment through voice commands without directly touching the device. Voice control enables the fan to have more functions, such as intelligent operation based on user voice commands and customized voice settings, thereby enhancing the device's intelligence and user experience.

[0081] For the voice output module 123, as one implementation method, such as Figure 12 As shown, the voice output module 123 includes a power amplifier module 1131 and a speaker 1132. The power amplifier module 1131 is connected to the voice recognition module 122 and the speaker 1132 respectively.

[0082] Among them, the power amplifier module 1131 is mainly responsible for amplifying the voice signal, amplifying the low-level voice signal output from the voice recognition module 122 to a high-level signal sufficient to drive the speaker 1132. The speaker 1132 receives the amplified voice signal from the power amplifier module 1131 and converts it into sound output.

[0083] As an example, such as Figure 13 As shown, the voice output module 123 includes a power amplifier chip U2 and a speaker S1. The B1 and B2 terminals of the power amplifier chip U2 are connected to pins 16 and 17 of the voice recognition chip U1, respectively. The power amplifier chip U2 is responsible for amplifying the voice signal and outputting the voice from the speaker S1.

[0084] The technical advantage of this embodiment is that the power amplifier module can ensure that the voice signal is not lost or distorted during transmission, and can drive the speaker with sufficient volume so that the user can hear the voice output clearly.

[0085] As one implementation method, such as Figure 14 As shown, the portable fan also includes a network module 106, which is connected to the voice module 112 and the control module 102 respectively. The voice module 112 uploads the voice signal to the cloud server 107 through the network module 106. The cloud server 107 converts the voice signal into a switch signal and a fan speed adjustment control signal and outputs them to the network module 106. The network module 106 sends the switch signal and the fan speed adjustment control signal to the control module 102.

[0086] The system's recognition accuracy and flexibility can be further improved by utilizing the voice recognition service and remote control function of the cloud server 107 via network connectivity. The specific steps are as follows: A microphone captures the user's voice signal, which is then transmitted to the network module 106 via analog-to-digital conversion. The network module 106 uploads the captured voice signal to the cloud server 107 for voice recognition. The cloud server 107 converts the voice signal into on / off signals and fan speed adjustment control signals, and returns them to the network module 106. The network module 106 sends the on / off signals and fan speed adjustment control signals returned from the cloud to the control module 102, which generates corresponding control signals. The control module 102 responds to voice commands, such as "turn on the fan" or "turn off the fan," or can customize other on / off commands to increase ease of use and enjoyment. Possible custom on / off commands include: "turn on the fan," "turn off the fan," "start blowing air," "I'm hot, turn on the fan," etc. These commands can be further expanded based on user habits and preferences to improve the interactive experience. Based on voice commands, the control module 102 generates a switch control signal. The control module 102 calculates the corresponding PWM signal duty cycle and generates a PWM control signal based on voice commands such as "increase fan speed" or "decrease fan speed." The drive module 103 drives the three-phase micro motor 104 based on the received switch control signal and PWM control signal, controlling the fan's on / off state and fan speed adjustment.

[0087] The technical advantages of this implementation are as follows: Since the speech recognition is performed on a cloud server, which has stronger computing power and more efficient speech recognition algorithms, it can more accurately recognize the user's voice commands and improve the recognition accuracy. The speech recognition task is completed in the cloud, which reduces the computing burden on the portable fan device, allowing the device to use lower-cost hardware configurations and extend battery life. The addition of a networking module enables the portable fan to interact with other smart devices, realize remote control and data analysis, and further enhance the user experience and the intelligence level of the device.

[0088] As one implementation method, such as Figure 15 As shown, the portable fan also includes a speed measurement module 105, which is connected to the three-phase micro motor 104 and the control module 102 respectively. The speed measurement module 105 is used to measure the actual speed of the three-phase micro motor 104 and send it to the control module 102. The control module 102 obtains the speed change based on the actual speed and the target speed, adjusts the duty cycle of the PWM signal based on the speed change, and outputs the adjusted PWM control signal to the drive module 103.

[0089] In this embodiment, an incremental PID control algorithm is specifically used to generate the PWM signal to improve the smoothness of the PWM signal and the accuracy of motor speed regulation. This is achieved through the following steps: The incremental PID control algorithm calculates the current error and the previous errors, adjusts the control quantity, and thus achieves precise control of the system. It includes three parts: proportional (P), integral (I), and derivative (D): proportional control (P): proportional adjustment of the current error; integral control (I): cumulative adjustment of past errors; derivative control (D): adjustment of the rate of change of the current error. The PWM module and timer are initialized, and the parameters required by the PID control algorithm (proportional coefficient Kp, integral coefficient Ki, derivative coefficient Kd) are set. Sensor data is acquired. The speed measurement module 105 can be a magnetic encoder or a Hall sensor to measure the motor speed in real time and feed it back to the control module 102. The control module 102 calculates the current error based on the set target speed and the actual measured speed, calculates the incremental control quantity based on the current error, adjusts the duty cycle of the PWM signal, outputs the PWM signal, and controls the speed of the three-phase micro motor 104.

[0090] The technical advantages of this implementation are as follows: the PID control algorithm adjusts the control quantity according to the error, which can accurately track the set value and make the motor speed quickly stabilize near the target value. The PID control algorithm responds quickly to the error change and can adjust the PWM signal in time when the load changes, ensuring the flexibility and accuracy of wind speed adjustment. Furthermore, the PID control algorithm can accurately adjust the PWM control signal to make the wind speed transition smoothly.

[0091] In one implementation, when the control module 102 detects a change in the operating voltage, it maintains the operating voltage within a constant voltage range (e.g., 2 to 18 volts) by boosting or bucking the voltage.

[0092] When the control module 102 detects a change in the operating voltage, in order to maintain the stability of motor operation, the control module can adjust the operating voltage to a preset constant voltage range through a boost or buck circuit. The control module 102 continuously monitors the input voltage, and when it detects a voltage deviation from the preset range (e.g., 6-8.4V), it triggers the voltage regulation mechanism. The control module 102 controls a boost or buck converter. For example, when the input voltage is lower than the set range, the control module 102 activates the boost circuit to raise the voltage to the set range. Conversely, when the input voltage is higher than the set range, the control module 102 activates the buck circuit to lower the voltage to the set range. Through a feedback loop, the control module 102 can adjust the boost or buck level in real time to ensure that the output voltage remains constant within the preset range.

[0093] As one implementation, when the control module 102 detects a change in the operating current, it maintains the operating current within a constant current range (e.g., 0.1 to 10 amps) by adjusting the PWM control signal.

[0094] When the control module 102 detects a change in the operating current, it adjusts the PWM (Pulse Width Modulation) control signal to maintain the current within a constant range. The control module 102 continuously monitors the motor's operating current. When the current deviates from a preset range (e.g., 0.12-1A), a current regulation mechanism is triggered. The control module 102 changes the motor's input power by adjusting the duty cycle of the PWM signal. For example, when the current is detected to be below the preset range, the PWM signal duty cycle is increased to increase the input power and thus the current. Conversely, when the current is above the preset range, the PWM signal duty cycle is decreased to reduce the input power and thus the current. Through feedback from the current sensor, the control module 102 adjusts the PWM signal duty cycle in real time to ensure that the operating current remains within a constant range.

[0095] In one implementation, when the control module 102 detects a change in the rated operating power, it maintains the rated operating power stable (e.g., from 0.5 to 100 watts) by adjusting the operating voltage or operating current.

[0096] The control module 102 continuously monitors the motor's operating power (P=V×I). When it detects a power deviation from the set value, it triggers a power regulation mechanism. By controlling a boost or buck converter, it adjusts the input voltage to restore the power to the set value. For example, when the power is lower than the set value, it increases the input voltage to increase power; when the power is higher than the set value, it decreases the input voltage to decrease power. It also adjusts the PWM signal to change the current, restoring the power to the set value. For example, when the power is lower than the set value, it increases the PWM signal duty cycle to increase current and power; when the power is higher than the set value, it decreases the PWM signal duty cycle to decrease current and power. Through control signal feedback, the control module 102 adjusts the voltage or current in real time to ensure that the operating power remains within a constant range.

[0097] In the above embodiments, the control module monitors the motor's operating voltage, current, and power in real time and ensures stable operation of the motor under various working conditions through corresponding adjustment mechanisms, thereby improving the motor's efficiency and performance and guaranteeing the reliability and stability of the portable fan in different environments.

[0098] For the driver module 103, as one implementation method, such as Figure 16 and Figure 17 As shown, the first bridge arm includes a first upper bridge arm switch 301 and a second lower bridge arm switch 302; the second bridge arm includes a third upper bridge arm switch 303 and a fourth lower bridge arm switch 304; the third bridge arm includes a fifth upper bridge arm switch 305 and a sixth lower bridge arm switch 306; the midpoint of the first bridge arm is connected to a first coil 311; the midpoint of the second bridge arm is connected to a second coil 312; and the midpoint of the third bridge arm is connected to a third coil 313. The first upper bridge arm switch 301, the first coil 311, the second coil 312, and the fourth lower bridge arm switch 304 form a first circuit. The first upper bridge arm switch 301, the first coil 311, the third lower bridge arm switch 304, the first upper bridge arm switch 303, the first lower bridge arm switch 304, the fourth lower bridge arm switch 305, the fifth upper bridge arm switch 305, the sixth lower bridge arm switch 306, and the sixth lower bridge arm switch 306 form a first circuit. Coil 313 and the sixth lower bridge arm switch 306 form a second circuit; the third upper bridge arm switch 303, the second coil 312, the third coil 313 and the sixth lower bridge arm switch 306 form a third circuit; the third upper bridge arm switch 303, the second coil 312, the first coil 311 and the second lower bridge arm switch 302 form a fourth circuit; the fifth upper bridge arm switch 305, the third coil 313, the first coil 311 and the second lower bridge arm switch 302 form a fifth circuit; the fifth upper bridge arm switch 305, the third coil 313, the second coil 312 and the fourth lower bridge arm switch 304 form a sixth circuit.

[0099] The first bridge arm includes a first upper bridge arm switch 301 and a second lower bridge arm switch 302, connected at the midpoint to a first coil 311. The second bridge arm includes a third upper bridge arm switch 303 and a fourth lower bridge arm switch 304, connected at the midpoint to a second coil 312. The third bridge arm includes a fifth upper bridge arm switch 305 and a sixth lower bridge arm switch 306, connected at the midpoint to a third coil 313, forming a total of six loops. Each loop consists of a switch and a coil. The control module 102 controls each loop to conduct sequentially via switch control signals to drive the three-phase micro motor 104 to start operating. The control module 102 generates switch control signals based on the received switch signals. These switch control signals are used to control the switch in each loop sequentially. Specifically, the switch in each bridge arm is turned on sequentially according to the switch control signals, so that current can drive the phase coil of each motor. As the switch in each bridge arm gradually conducts, current flows through its respective phase coil, and the motor starts to rotate. Gradually conducting the six loops means starting each motor phase in the fan in sequence, thereby starting the entire fan system. Specifically, the switching transistors of each of the six circuits are turned on in sequence, thus making each circuit conductive. The first to the sixth circuits are conductive in sequence, and the fan rotates in the forward direction. The sixth circuit to the first circuit are conductive in sequence, and the fan rotates in the reverse direction.

[0100] After receiving the wind speed regulation control signal, the control module 102 generates a PWM control signal. For each loop, the PWM control signal is used to regulate its corresponding switching transistor, thereby regulating the speed of the three-phase micro motor 104.

[0101] In one implementation, the control module also controls the on-time of the switching transistors in each loop via PWM control signals to adjust the speed of the three-phase micro motor 104.

[0102] The control module receives fan speed adjustment control signals from the touch module or voice module, which contain user commands to adjust the fan speed. Based on the fan speed adjustment control signals, the control module 102 generates corresponding pulse width modulation (PWM) control signals. The duty cycle of the PWM signal (i.e., the proportion of the high-level duration to the entire cycle) directly corresponds to the desired fan speed. The control module 102 applies the generated PWM control signals to two switching transistors in each loop, specifically: the switching transistors in each loop switch according to the duty cycle of the PWM signal. At a high level, the switching transistor is on; at a low level, the switching transistor is off. By adjusting the duty cycle of the PWM signal, the on-time of the switching transistors in each loop is controlled, thereby regulating the current flowing through the motor coil. The motor speed is directly proportional to the current intensity in the motor coil. By adjusting the on-time of the switching transistors in each loop, the control module 102 can precisely control the current of the three-phase micromotor 104, thereby regulating the speed of the three-phase micromotor 104. By gradually increasing or decreasing the duty cycle of the PWM signal, the fan speed can be accelerated or decelerated, thus achieving the adjustment of the fan speed.

[0103] The technical advantage of this embodiment is that the control module generates a corresponding PWM control signal based on the received wind speed adjustment control signal. The duty cycle of the PWM signal directly determines the conduction time of the switching transistor in each circuit, thereby controlling the current of the motor coil. Therefore, the speed of the three-phase micro motor 104 can be precisely adjusted by adjusting the duty cycle of the PWM signal.

[0104] In one implementation, the portable fan also includes an energy feedback circuit. This circuit connects to the control module, the motor, and the energy storage unit. When the control module detects a decrease in the PWM signal duty cycle, it activates the energy feedback circuit. The back electromotive force generated during motor deceleration is converted into electrical energy by a rectifier circuit and stored in the energy storage unit. The energy recovery circuit includes a rectifier circuit, an energy storage unit, and a control switch. Upon receiving the energy feedback signal, the control switch is activated, converting the motor's kinetic energy into electrical energy through the rectifier circuit and storing it in a supercapacitor or battery.

[0105] As an example, a portable fan is running at high speed. When the user inputs a signal to reduce the fan speed or stop the fan, the control module detects the speed adjustment control signal or the on / off signal and reduces the duty cycle of the PWM signal, causing the motor to slow down. The control module generates an energy feedback signal, activating the energy recovery circuit. The back electromotive force generated during motor deceleration is converted into electrical energy through a rectifier circuit and stored in a supercapacitor or battery. When the fan restarts, the control module detects the start signal and controls the energy storage unit to release electrical energy to power the motor, reducing external power consumption.

[0106] The technical advantages of this implementation are as follows: through energy recovery, kinetic energy can be converted into electrical energy and stored when the fan slows down or stops, reducing energy waste; reducing dependence on external power sources, extending battery life, and improving the endurance of portable fans; and allowing users to enjoy more stable and longer-lasting wind speed adjustment during use, thus improving the overall user experience.

[0107] In one implementation, the input module 101 includes a voice module 112 and a touch module 111. Both the voice module 112 and the touch module 111 are connected to the control module 102. The voice module 112 and the touch module 111 output a switch signal and a wind speed adjustment control signal respectively according to the user's instructions. The control module 102 generates a switch control signal and a PWM control signal respectively according to the switch signal and the wind speed adjustment control signal.

[0108] The technical advantage of this implementation is that the combination of the voice module and the touch module allows users to choose the most suitable operation method according to their own preferences, thereby increasing the intelligence of the product.

[0109] In one implementation, the input module 101 includes a voice module 112 and a touch module 111. Both the voice module 112 and the touch module 111 are connected to the control module 102. The voice module 112 turns the touch module on and off according to user instructions and outputs a switch signal. The touch module 111 outputs a wind speed adjustment control signal. The control module 102 generates a switch control signal and a PWM control signal according to the switch signal and the wind speed adjustment control signal, respectively.

[0110] In this system, the user issues voice commands to the voice module 112 to turn the touch module on or off, and the voice module 112 transmits these commands to the control module 102. The user also issues voice commands to the voice module 112 to turn the fan on or off, and the voice module 112 generates a switch signal based on the user's command and transmits it to the control module 102. When the touch module 111 is enabled, the user inputs a fan speed adjustment command to the touch module 111 through touch operations (such as swiping or clicking), and the touch module 111 generates a fan speed adjustment control signal based on the user's operation and transmits it to the control module 102. The control module 102 enables or disables the touch module 111 according to the commands from the voice module 112. When the touch module 111 is disabled, all touch operations will not generate a fan speed adjustment control signal, thus avoiding accidental operation. After receiving the switch signal, the control module 102 generates a switch control signal to control the fan's on or off state. After receiving the fan speed adjustment control signal, the control module 102 calculates the corresponding PWM signal duty cycle and generates a PWM control signal to control the speed of the three-phase micro motor 104.

[0111] The technical advantages of this implementation are as follows: The touch module can be enabled or disabled via voice commands. When holding the fan, users can disable the touch module by voice, avoiding accidental adjustments to the fan speed due to unintentional touches, thus improving the user experience and product safety. The switch signal generated by the voice module is processed by the control module, ensuring accurate fan on / off operation. When the touch module is enabled, it generates a fan speed adjustment control signal based on the user's touch operation. The control module then generates a high-precision PWM control signal based on this signal, achieving precise adjustment of the fan speed and meeting the user's personalized needs.

[0112] As an example, such as Figure 18 The diagram shown is a circuit diagram of the drive module 103, which includes a first drive submodule, a second drive submodule, and a third drive submodule.

[0113] The first driving submodule includes MOSFETs Q1, Q2, and Q7, capacitors C16, C21, and C27, and resistors R20, R24, R25, and R26. The first terminals of capacitors C16, R24, Q7, Q2, C21, and C27 are all connected to the power supply. The second terminal of capacitor C16 is connected to the second terminal of resistor R24, the drain of MOSFET Q1, and the gate of MOSFET Q2. The gate of MOSFET Q1 is connected to the first terminal of resistor R20 and the first control signal terminal U_H. The source of MOSFET Q1 is connected to resistor R20. The second terminal of the MOSFET Q2 is connected to ground. The drain of the MOSFET Q2 is connected to the drain of the MOSFET Q7 and the first terminal of the first coil. The gate of the MOSFET Q7 is connected to the first terminal of the resistor R25 and the second control signal terminal U_L. The source of the MOSFET Q7 is connected to the second terminal of the resistor R25 and the first terminal of the resistor R26. The second terminal of the capacitor C21 and the second terminal of the capacitor C27 are connected to ground.

[0114] The second driving submodule includes MOSFETs Q3, Q4, and Q8, capacitors C26 and C25, resistors R32, R34, R35, and R38. The first terminal of capacitor C26, the first terminal of resistor R34, the source of MOSFET Q4, and the first terminal of capacitor C25 are all connected to the power supply. The second terminal of capacitor C26 is connected to the second terminal of resistor R34, the drain of MOSFET Q3, and the gate of MOSFET Q4. The gate of MOSFET Q3 is connected to the first terminal of resistor R32 and the third control signal terminal V_H. The source of MOSFET Q3 and the second terminal of resistor R32 are connected to the ground. The drain of MOSFET Q4 is connected to the drain of MOSFET Q8 and the first terminal of the second coil. The gate of MOSFET Q8 is connected to the first terminal of resistor R35 and the fourth control signal terminal V_L. The source of MOSFET Q8 is connected to the second terminal of resistor R35 and the first terminal of resistor R38. The second terminal of capacitor C25 is connected to ground.

[0115] The third driving submodule includes MOSFETs Q5, Q6, and Q9, capacitors C32 and C35, resistors R42, R46, R49, and R51. The first terminals of capacitors C32, R46, Q9, and C35 are all connected to the power supply. The second terminal of capacitor C32 is connected to the second terminal of resistor R46, the drain of MOSFET Q5, and the gate of MOSFET Q6. The gate of MOSFET Q5 is connected to the first terminal of resistor R42 and the second terminal of resistor R51. The fifth control signal terminal W_H, the source of MOSFET Q5 and the second terminal of resistor R42 are connected to ground, the drain of MOSFET Q6 is connected to the drain of MOSFET Q9 and the first terminal of the third coil, the gate of MOSFET Q9 is connected to the first terminal of resistor R49 and the sixth control signal terminal W_L, the source of MOSFET Q9 is connected to the second terminal of resistor R49 and the first terminal of resistor R51, the second terminal of capacitor C25 is connected to ground, and the second terminals of resistors R26, R38 and R51 are all connected to ground.

[0116] The circuit consists of a power supply, MOSFET Q2, a first coil, a second coil, MOSFET Q8, and resistor R38 forming a first circuit; a power supply, MOSFET Q2, a first coil, a third coil, MOSFET Q9, and resistor R51 forming a second circuit; a power supply, MOSFET Q4, a second coil, a third coil, MOSFET Q9, and resistor R51 forming a third circuit; a power supply, MOSFET Q4, a second coil, a first coil, MOSFET Q7, and resistor R26 forming a fourth circuit; a power supply, MOSFET Q6, a third coil, a first coil, MOSFET Q7, and resistor R26 forming a fifth circuit; and a fifth upper bridge arm switch, a third coil, a second coil, MOSFET Q8, and resistor R38 forming a sixth circuit.

[0117] Among them, MOSFETs Q2, Q4, and Q6 can be NMOS or PMOS transistors. In addition to the driving method shown in the circuit diagram, other driving methods can also be used for the half-bridge driving of MOSFETs Q2, Q4, and Q6, such as capacitor energy storage driving, transformer coupling driving, optocoupler driving, etc.

[0118] The control module 102 inputs switching control signals to the two switching transistors in each loop through the first control signal terminal to the sixth control signal terminal. The control module 102 controls the first loop to the sixth loop to conduct sequentially according to a preset order to drive the three-phase micro motor 104 to start running. The control module 102 also inputs PWM control signals to the two switching transistors in each loop through the first control signal terminal to the sixth control signal terminal. The duty cycle of the PWM control signal controls the conduction current of each loop to adjust the speed of the three-phase micro motor 104.

[0119] As one implementation method, such as Figure 19 As shown, in this embodiment, the two switching transistors of each bridge arm are integrated together. MOSFETs Q2 and Q7 are integrated into chip S1, MOSFETs Q4 and Q8 are integrated into chip S2, and MOSFETs Q6 and Q9 are integrated into chip S3. The integrated switching transistors can significantly reduce the space occupied on the circuit board, making the drive circuit more compact. Using integrated switching transistor modules simplifies circuit design and layout and reduces wiring complexity.

[0120] As one implementation method, such as Figure 20 As shown, the input module includes a manual switch module 201, a touch module 111, a voice module 112, a network module 106, and a wireless module 202, all connected to the control module 102. The portable fan also includes an atomizing module 203, a cooling module 204, a heating module 205, a lighting module 206, and an oscillating module 207, all connected to the control module 102.

[0121] Among them, the manual switch module 201 can be a push button switch or an encoder, the touch module 111 can be a touch button, a sliding resistor, a touch sliding module or a touch screen module, and the wireless module 202 can be a mobile control module, a Bluetooth control module and a wireless control module. The system includes several key components: a push-button switch for manual fan control (turning the fan on / off and adjusting its speed); an encoder for adjusting fan speed (rotating the encoder changes the fan speed setting); touch buttons for controlling fan operation and speed adjustment via touch sensing; a sliding resistor for adjusting resistance value to control fan speed, providing continuous speed control; a touch slider module for adjusting fan speed via swipe gestures, detecting parameters such as speed, direction, and position to control the fan speed; a touchscreen module for a graphical interface, allowing control of various functions such as power on / off, fan speed adjustment, and timer settings; a voice control module for controlling fan operation and speed adjustment via voice commands, enhancing the smart control experience; a networked voice control module for remote voice control via internet connection, uploading voice commands to a cloud server for processing; a networked module for remote control via internet, allowing control of fan functions via mobile phones or other devices; and a mobile control module for controlling fan functions, including power on / off, fan speed adjustment, and timer settings, via mobile devices (such as phones or tablets). The Bluetooth control module enables short-range wireless control of the fan via Bluetooth connection to mobile devices. The wireless control module allows for remote control and management of the fan via wireless signals (such as Wi-Fi). The atomizing module 203 provides humidification, making the fan-blown air cooler and more moist by atomizing water. The cooling module 204 provides cooling, lowering the outlet air temperature through internal cooling elements to improve cooling effect. The heating module 205 provides heating, warming the fan-blown air through internal heating elements, suitable for cold seasons. The lighting module 206 provides lighting, integrating LED lights or other light sources to provide nighttime illumination or decorative lighting effects. The oscillation module 207 provides automatic oscillation, allowing the fan to swing left and right, increasing airflow coverage and improving comfort.

[0122] The technical advantages of this embodiment are that the portable fan not only provides diverse control methods and intelligent functions, but also significantly improves the user's comfort and ease of operation, meeting various needs in different usage scenarios.

[0123] It should be noted that all input, output, and control functions in a portable fan can be integrated into a single chip or integrated circuit. This integration can simplify the system design and manufacturing process, reduce the number of components and space occupation, and may also reduce cost and power consumption.

[0124] This embodiment provides a portable fan based on a three-phase micro motor, which includes at least a handheld fan for handheld use, a desktop fan for portable use and placement on a table, or a neck fan for neck hanging use. The structure of the portable fan includes, but is not limited to, the following implementation methods: As one implementation method, this embodiment provides a portable fan based on a three-phase micro motor, which can be used as a handheld fan, such as... Figure 21 The image shown is an exploded view of a portable fan, which includes: Left handle shell 81, right handle shell 82, front air vent shell 83, middle shell 84, air vent 85, button 86, toggle switch button 87, cable tray 88, shock-absorbing silicone 89, shock-absorbing silicone 90, air inlet mesh 91, light-blocking foam 92, battery foam 93, silicone gasket 94, motor assembly 95, screw 96, screw 97, battery 98, and PCB 99.

[0125] As one implementation method, this embodiment provides a portable fan based on a three-phase micro motor, which can be used as another handheld fan, such as... Figure 22 The image shown is an exploded view of a portable fan, which includes: Front shell decorative part 401, flat connecting plate assembly 402, ball bearing 403, front shell 404, air duct 405, middle shell 406, fan motor 407, spring 408, fan blade 409, screw 410, rear shell 411, rear shell decorative part 412, screw cover 413, screw 414, roller assembly 415, button decorative part 416, safety supervision office fixing bracket 417, roller switch small board 418, screw 419, toggle switch small board 420, main board fixing bracket 421, toggle switch 422, handle bracket 423, battery pack 424, handle 425, handle decoration 426, lanyard bracket 427, screw 428, and retaining ring 429.

[0126] As one implementation method, this embodiment provides a portable fan based on a three-phase micro motor, which can be used as a portable desktop fan that can be placed on a table. Figures 23 to 25 The image shown is an exploded view of a portable fan, which includes: 1. Screen housing; 2. Front screen housing; 3. Character backlight patch; 4. Screen backlight bracket; 5. Digital screen PCB; 6. Self-tapping screw; 7. Back screen housing; 8. Screw; 9. Shock-absorbing silicone ring; 10. Shock-absorbing EVA; 11. Fan motor bracket; 12. Motor; 13. Clamping ring; 14. Washer; 15. Fan bearing; 16. Motherboard and digital screen PCB connecting cable; 17. Fan spring; 18. Magnetic ring assembly; 19. Fan blade; 20. Fan blade housing; 21. Light guide ring; 22. LED strip; 23. Fan head bracket; 24. Lower screw hole cover; 25. Upper screw hole cover; 26. Air duct component; 27. Filter element end clamping foam; 28. Air filter element; 29. ​​Filter element bracket; 30. Back cover; 31. Copper nut; 32. Countersunk machine screw; 33. Housing wire clamping ring; 34. Wire clamping cover; 35. Base. 36. Cable clip 37. Spindle 38. Air duct cable cover 39. Left spindle plug 40. Right spindle plug 41. Cable cover 42. Aluminum alloy bracket 43. Machine screw 44. Base upper shell 45. Self-tapping screw 46. Stepper motor 47. Stepper motor bracket 48. Steel ball 49. Steel ball bracket 50. Steel ball lower bracket 51. Large gear 52. Small gear 53. Clutch gear 54. Stepper motor bearing 55. Battery EVA 56. Spring 57. Clip 58. Round button 59. Round button silicone 60. Light button silicone 61. Light button 62. Knob 63. Button board 64. Self-tapping screw 65. Charging board 66. Charging board bracket 67. Base lower shell 67. Battery pack 68. Battery EVA 69. Base bottom shell 70. Label 71. and foot pads 72.

[0127] As one implementation method, this embodiment provides a portable fan based on a three-phase micro motor, which can be used as a neck fan, such as... Figure 26 The image shown is an exploded view of a portable fan, which includes: Neck brace 501, air inlet 502, air outlet 503, and clamp arm 504.

[0128] Example 2: This embodiment provides a control method for a portable fan based on the embodiment provided, such as... Figure 27 As shown, the control methods include: Step S101. Control the operating voltage of the three-phase micro motor to 2 to 18 volts, control the operating current of the three-phase micro motor to 0.1 to 10 amps, and / or control the rated operating power of the three-phase micro motor to 0.5 to 100 watts.

[0129] Step S102. Based on the control of working voltage, working current and / or rated working power, the rated working speed of the three-phase micro motor is controlled by the drive module to reduce the high-speed noise of the three-phase micro motor and control the wind speed within the preset wind speed range.

[0130] Control methods also include: Step S111. Obtain the wind speed regulation control signal; Step S112. Convert the wind speed regulation control signal into a PWM control signal; Step S113. Control the switching transistors of each bridge arm using PWM control signals to adjust the speed of the three-phase micro motor.

[0131] Control methods also include: Step S201. Obtain the switch signal.

[0132] Step S202. Convert the switch signal into a switch control signal.

[0133] Step S203. Control the switching transistor of each bridge arm through the switching control signal to drive the three-phase micro motor to start or stop running.

[0134] Among them, the switch signal and the fan speed adjustment control signal are control signals generated according to user instructions. Touch signals and adjustment signals generated by the user through touch or other means can be directly converted into switch control and PWM control signals. The switch signal can be the user's switch operation, such as the command to turn the fan on or off; the fan speed adjustment control signal is used to adjust the fan speed, which is usually generated by the user's manual operation or other control methods.

[0135] The switching signal is processed and converted into a switching control signal that controls the switching transistors of the bridge arms. This signal is used to start or stop the motor. The wind speed regulation control signal is processed to calculate the duty cycle of the corresponding PWM (Pulse Width Modulation) control signal. The PWM control signal is used to regulate the speed of the three-phase micromotor by adjusting the on-time of the switching transistors of each bridge arm.

[0136] Based on the switch control signal, the drive module will turn the switch of each bridge arm on or off accordingly, thereby starting or stopping the motor. At the same time, based on the calculated PWM control signal, the drive module adjusts the duty cycle and duty cycle of each bridge arm switch to control the speed and power output of the three-phase micro motor.

[0137] As one implementation method, when the input module is a touch module, the wind speed adjustment control signal is converted into a PWM control signal, including: The duty cycle of the PWM signal is calculated based on the wind speed regulation control signal, and the PWM control signal is generated based on the PWM signal duty cycle.

[0138] In one implementation, when the input module is a voice module, the voice module captures the user's voice signal and converts the voice signal into a switch signal and a wind speed adjustment control signal.

[0139] For details of the two implementation methods described above, please refer to Example 1, which will not be repeated here.

[0140] As one implementation method, the operating voltage of the three-phase micro motor is controlled to be between 2 and 18 volts. Specifically, this may include maintaining the operating voltage at 2 to 18 volts by boosting or bucking the voltage when a change in the operating voltage is detected.

[0141] As one implementation method, the operating current of the three-phase micro motor is controlled to be between 0.1 and 10 amps. Specifically, this may include: when a change in the operating current is detected, adjusting the PWM control signal to maintain the operating current at 0.1 to 10 amps.

[0142] As one implementation method, controlling the rated operating power of a three-phase micro motor to be between 0.5 and 100 watts includes: when a change in the rated operating power is detected, maintaining the rated operating power to be between 0.5 and 100 watts by adjusting the operating voltage or operating current.

[0143] As one implementation method, the rated operating speed of the three-phase micro motor is controlled by a drive module based on the control of the operating voltage, operating current, and / or rated operating power. Specifically, this may include: With an operating voltage of 6 to 8.4 volts, an operating current of 0.12 to 1 amp, and / or a rated operating power of 0.8 to 9 watts, the rated operating speed of the three-phase micro motor controlled by the drive module is 6000-15000 RPM.

[0144] With an operating voltage of 5.9 to 8.4 volts, an operating current of 0.5 to 6 amps, and / or a rated operating power of 5 to 50 watts, the rated operating speed of the three-phase micro motor controlled by the drive module is 20,000-80,000 RPM.

[0145] With an operating voltage of 2 to 5.8 volts, an operating current of 0.25 to 2 amps, and / or a rated operating power of 1 to 8 watts, the rated operating speed of the three-phase micro motor controlled by the drive module is 15,000-41,000 RPM.

[0146] With an operating voltage of 8.5 to 12.6 volts, an operating current of 0.5 to 5 amps, and / or a rated operating power of 6 to 60 watts, the rated operating speed of the three-phase micro motor controlled by the drive module is 25,000-85,000 RPM.

[0147] With an operating voltage of 12 to 18 volts, an operating current of 0.1 to 1 amp, and / or a rated operating power of 2 to 16 watts, the rated operating speed of the three-phase micro motor controlled by the drive module is 2000-6000 RPM.

[0148] The specific process and effects of each of the above steps can be found in Example 1, and will not be repeated here.

[0149] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A control method for a portable fan, characterized in that, The portable fan includes a control module, a drive module, and a three-phase micro motor connected in sequence. The control method is applied to the control module and includes: The operating voltage of the three-phase micro motor is controlled to be 2 to 18 volts, the operating current of the three-phase micro motor is controlled to be 0.1 to 10 amps, and / or the rated operating power of the three-phase micro motor is controlled to be 0.5 to 100 watts; Based on the control of the operating voltage, the operating current and / or the rated operating power, the rated operating speed of the three-phase micro motor is controlled by the drive module to reduce the high-speed noise of the three-phase micro motor and control the wind speed within the preset wind speed range.

2. The control method as described in claim 1, characterized in that, The portable fan also includes an input module connected to the control module. The input module outputs a wind speed adjustment control signal according to user commands. The drive module includes a first bridge arm, a second bridge arm, and a third bridge arm. Each bridge arm has an upper bridge arm switch and a lower bridge arm switch on both sides of its midpoint. The midpoint of each bridge arm is connected to one phase coil of the three-phase micro motor. The control method further includes: Obtain the wind speed regulation control signal; The wind speed regulation control signal is converted into a PWM control signal; The switching transistors of each bridge arm are controlled by the PWM control signal to adjust the speed of the three-phase micro motor.

3. The control method as described in claim 2, characterized in that, The step of controlling the switching transistors of each bridge arm through the PWM control signal to adjust the speed of the three-phase micro motor includes: The speed of the three-phase micro motor is controlled by controlling the on-time of the switching transistor of each bridge arm through the drive module based on the PWM control signal.

4. The control method as described in claim 2, characterized in that, The input module outputs a wind speed switch signal according to user instructions, and the control method further includes: Obtain the switch signal; The switching signal is converted into a switching control signal; The switching control signal controls the switching transistor of each bridge arm to drive the three-phase micro motor to start or stop operating.

5. The control method as described in claim 4, characterized in that, The step of controlling the switching transistor of each bridge arm via the switch control signal to drive the three-phase micromotor to start or stop operation includes: according to the switch control signal, turning the switching transistor of each bridge arm on or off via the drive module to drive the three-phase micromotor to start or stop operation; and / or, When the input module is a voice module, the voice module is configured to capture the user's voice signal and convert the voice signal into the switch signal or the wind speed adjustment control signal.

6. The control method as described in claim 4, characterized in that, The input module is a touch module, which is configured to detect sliding parameters and generate the wind speed adjustment control signal; the conversion of the wind speed adjustment control signal into a PWM control signal includes: The duty cycle of the PWM signal is calculated based on the wind speed regulation control signal, and a PWM control signal is generated based on the duty cycle of the PWM signal.

7. The control method as described in claim 6, characterized in that, The sliding parameter is the sliding distance, which is obtained by the touch module recording the starting position when the user starts sliding on the touch area and the ending position when the user finishes sliding on the touch area, and then calculating the distance between the starting position and the ending position. The wind speed adjustment control signal is generated by the touch module based on the sliding distance of the user on the touch area. The step of calculating the PWM signal duty cycle based on the wind speed adjustment control signal includes: comparing the sliding distance with the maximum sliding distance based on the wind speed adjustment control signal to obtain a sliding distance ratio, wherein the maximum sliding distance is a predefined maximum distance that the user slides on the touch area; calculating the corresponding PWM signal duty cycle based on the sliding distance ratio and the preset minimum and maximum values ​​of the PWM signal duty cycle; or, The sliding parameter is the sliding time, which is obtained by recording the start and end times of the sliding action when the touch module detects the sliding action, and then calculating the duration between the start and end times. The step of calculating the PWM signal duty cycle based on the wind speed adjustment control signal includes: calculating the sliding time based on the wind speed adjustment control signal to obtain a normalized sliding time; and generating a corresponding PWM signal duty cycle based on the normalized sliding time; or... The touch module can also be configured to detect the coordinates of the click position and use the coordinates of the click position as a click parameter to generate the wind speed adjustment control signal. The step of calculating the PWM signal duty cycle based on the wind speed adjustment control signal includes: determining the touch area corresponding to the click parameter based on the wind speed adjustment control signal; and calculating the required PWM signal duty cycle based on the wind speed level corresponding to the touch area. Different touch areas correspond to different wind speed levels.

8. The control method as described in claim 6, characterized in that, The portable fan also includes a speed measurement module, which is connected to both a three-phase micro motor and a control module. The speed measurement module measures the actual speed of the three-phase micro motor and sends the measurement data to the control module. The control method further includes: The speed change is obtained based on the actual speed and the target speed, and the duty cycle of the PWM signal is adjusted according to the speed change.

9. The control method as described in claim 1, characterized in that, The step of controlling the operating voltage of the three-phase micromotor to be between 2 and 18 volts includes: when a change in the operating voltage is detected, maintaining the operating voltage at 2 to 18 volts by boosting or bucking the voltage; and / or, Controlling the operating current of the three-phase micromotor to 0.1 to 10 amps includes: when a change in the operating current is detected, maintaining the operating current at 0.1 to 10 amps by adjusting the PWM control signal; and / or, The step of controlling the rated operating power of the three-phase micro motor to be between 0.5 and 100 watts includes: when a change in the rated operating power is detected, maintaining the rated operating power to be between 0.5 and 100 watts by adjusting the operating voltage or the operating current.

10. The control method as described in claim 1, characterized in that, The step of controlling the rated operating speed of the three-phase micro motor through the drive module based on the operating voltage, the operating current, and / or the rated operating power includes: When the operating voltage is 6 to 8.4 volts, the operating current is 0.12 to 1 amp, and / or the rated operating power is 0.8 to 9 watts, the rated operating speed of the three-phase micro motor is controlled by the drive module to be 6000-15000 RPM; and / or, When the operating voltage is 5.9 to 8.4 volts, the operating current is 0.5 to 6 amps, and / or the rated operating power is 5 to 50 watts, the drive module controls the rated operating speed of the three-phase micro motor to be 20,000-80,000 RPM; and / or, When the operating voltage is 2 to 5.8 volts, the operating current is 0.25 to 2 amps, and / or the rated operating power is 1 to 8 watts, the drive module controls the rated operating speed of the three-phase micro motor to be 15000-41000 RPM; and / or, When the operating voltage is 8.5 to 12.6 volts, the operating current is 0.5 to 5 amps, and / or the rated operating power is 6 to 60 watts, the drive module controls the rated operating speed of the three-phase micro motor to be 25,000-85,000 RPM; and / or, When the operating voltage is 12 to 18 volts, the operating current is 0.1 to 1 amp, and / or the rated operating power is 2 to 16 watts, the rated operating speed of the three-phase micro motor is controlled by the drive module to be 2000-6000 RPM.

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