Portable fan based on high-speed three-phase motor

Abstract

The utility model discloses a portable fan based on a high-speed three-phase motor, which comprises a control module, a driving module and the high-speed three-phase motor, the working voltage of the high-speed three-phase motor is 2-18 volts, the working current of the high-speed three-phase motor is 0.1-10 amperes, and / or the limit working power of the high-speed three-phase motor is 0.5-100 watts; and the control module controls the rated working rotating speed of the high-speed three-phase motor through the driving module according to the working voltage, the working current and / or the rated working power, so that the high rotating speed noise of the high-speed three-phase motor is reduced, and the wind speed is controlled to be within a preset wind speed interval. According to the technical scheme, the control module, the driving module and the high-speed three-phase motor are combined, the portable fan solution which is efficient, low in noise and capable of adjusting the wind speed is provided, the portability and use comfort of the fan are improved through the low-voltage driving technology and the control strategy, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a portable fan based on a high-speed three-phase motor. Background Art

[0002] At present, the application fields of high-speed three-phase motors mainly involve industrial equipment, power tools, aerospace, and automobiles. For example, in industrial equipment, high-speed rotation of high-speed motors is required in machine tools to improve production efficiency and machining accuracy, and in automobiles, high-speed rotation of high-speed motors is required to improve power output and fuel efficiency. Generally speaking, the operating speed of high-speed three-phase motors ranges from tens of thousands to over a hundred thousand revolutions per minute (RPM). Since these devices require strong power support, high-speed three-phase motors usually use mains power supply with a voltage range from 110V to 240V to ensure stable high-speed output of the motor. The manufacturing cost of high-speed motors is relatively high, generally ranging from dozens of yuan to over a hundred yuan. This is because high-speed three-phase motors require higher material strength and more precise manufacturing processes to ensure their stability and durability under high-speed rotation. Therefore, in the understanding of conventional technicians, high-speed three-phase motors are usually not applied to the field of small portable fans with a selling price of only dozens of yuan. Due to cost limitations, small portable fans usually use low-cost DC motors (such as brushless DC motors or brushed DC motors), and the operating speeds and manufacturing costs of these motors are relatively low, which are more suitable for the low-price market. Taking industry giant Dyson as an example, Dyson uses high-speed single-phase motors instead of three-phase motors in its high-end vacuum cleaners and hair dryers. Dyson's design takes into account factors such as product market positioning, cost control, and user needs. Single-phase motors are simpler in structure, more convenient to control, and lower in cost compared to three-phase motors, and can meet the usage requirements of household appliances.

[0003] In summary, there is no precedent in the current industry to apply high-speed three-phase motors to small portable fans. This is because the high-cost and high-power consumption characteristics of high-speed motors do not match the low-cost and low-power consumption requirements of small portable fans.

[0004] Portable fans have gradually become essential small appliances for people going out and in daily life due to their small size, light weight, and easy portability. It not only provides users with a convenient way to cool down but also brings great comfort in the hot summer, making it an ideal choice for many people when traveling and at home. However, the motor speeds of existing portable fans are relatively slow, the wind speed and air volume are limited, and the vibration and noise are also relatively large, resulting in users not being able to obtain the best comfort experience in different environments and needs. Summary of the Utility Model

[0005] An embodiment of the utility model provides a portable fan based on a high-speed three-phase motor to solve the above technical problems.

[0006] In the first aspect of the embodiment of the present utility model, a portable fan based on a high-speed three-phase motor is provided, including: a control module, a drive module, and a high-speed three-phase motor. Among them, the operating voltage of the high-speed three-phase motor is 2 to 18 volts, the operating current of the high-speed three-phase motor is 0.1 to 10 amperes, and / or the rated operating power of the high-speed three-phase motor is 0.5 to 100 watts;

[0007] The control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power, so as to reduce the high-speed noise of the high-speed three-phase motor and control the wind speed within a preset wind speed range.

[0008] Optionally, when the operating voltage of the high-speed three-phase motor is 6 to 8.4 volts, the operating current of the high-speed three-phase motor is 0.12 to 1 ampere, and / or the rated operating power of the high-speed three-phase motor is 0.8 to 9 watts, the control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power to be 6000 - 15000 RPM / MIN;

[0009] Or, when the operating voltage of the high-speed three-phase motor is 5.9 to 8.4 volts, the operating current of the high-speed three-phase motor is 0.5 to 6 amperes, and / or the rated operating power of the high-speed three-phase motor is 5 to 50 watts, the control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power to be 20000 - 80000 RPM / MIN;

[0010] Or, when the operating voltage of the high-speed three-phase motor is 2 to 5.8 volts, the operating current of the high-speed three-phase motor is 0.25 to 2 amperes, and / or the rated operating power of the high-speed three-phase motor is 1 to 8 watts, the control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power to be 15000 - 41000 RPM / MIN;

[0011] Or, when the operating voltage of the high-speed three-phase motor is 8.5 to 12.6 volts, the operating current of the high-speed three-phase motor is 0.5 to 5 amperes, and / or the rated operating power of the high-speed three-phase motor is 6 to 60 watts, the control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power to be 25000 - 85000 RPM / MIN;

[0012] Alternatively, when the operating voltage of the high-speed three-phase motor is 12 to 18 volts, the operating current of the high-speed three-phase motor is 0.1 to 1 ampere, and / or the rated operating power of the high-speed three-phase motor is 2 to 16 watts, the control module controls the rated operating speed of the high-speed three-phase motor to be 2000 - 6000 RPM / MIN by controlling the drive module according to the operating voltage, the operating current, and / or the rated operating power.

[0013] Optionally, the portable fan further includes an input module, the input module is connected to the control module, the drive module includes a first arm, a second arm, and a third arm, both sides of the midpoint of each arm include an upper-arm switching tube and a lower-arm switching tube, and the midpoint of each arm is connected to a phase coil of the motor;

[0014] The input module outputs a wind speed adjustment control signal according to a user instruction, the control module generates a PWM control signal according to the wind speed adjustment control signal, and controls the switching tubes of each arm through the PWM control signal to adjust the speed of the high-speed three-phase motor;

[0015] And / or, the input module further outputs a switch signal according to a user instruction, the control module generates a switch control signal according to the switch signal, and controls the switching tubes of each arm through the switch control signal to drive the high-speed three-phase motor to start or stop running.

[0016] Optionally, when the input module is a touch module, the touch module outputs a switch signal when a touch action is detected, and the control module generates a switch control signal according to the switch signal;

[0017] The touch module outputs a wind speed adjustment signal when a sliding parameter is detected, the control module calculates the duty cycle of the PWM signal according to the wind speed adjustment signal, and generates a PWM control signal according to the duty cycle of the PWM signal;

[0018] Alternatively, when the input module is a voice module, the voice module captures a user's voice signal and converts the voice signal into a switch signal and a wind speed adjustment control signal.

[0019] Optionally, the touch module is a touch sliding adjustment chip, the touch sliding adjustment chip includes a plurality of contacts, the touch sliding adjustment chip generates a switch signal when a touch action is detected through the plurality of contacts, and generates a corresponding wind speed adjustment control signal when a sliding parameter is detected through the plurality of contacts;

[0020] Alternatively, the touch module is a touch screen chip, which includes a switch area and a sliding area. The touch screen chip generates a switch signal when a touch action is detected through the switch area, and generates a corresponding wind speed adjustment control signal when a sliding parameter is detected through the sliding area;

[0021] Alternatively, the touch module includes multiple single-contact touch chips. The touch module generates a switch signal when a touch action is detected through any one of the contacts, and generates a corresponding wind speed adjustment control signal when sliding parameters are detected through multiple contacts;

[0022] Alternatively, the voice module includes a voice collection module, a voice recognition module, and a voice output module. The voice recognition module is respectively connected to the voice collection module, the voice output module, and the control module;

[0023] The voice module captures the user's voice signal. The voice recognition module converts the voice signal into a switch signal and a wind speed adjustment control signal and sends them to the control module. The voice recognition module also controls the voice output module to output or not output the execution result according to the feedback result of the control module.

[0024] Optionally, the portable fan further includes a networking module, which is respectively connected to the voice module and the control module;

[0025] The voice module uploads the voice signal to the cloud server through the networking module. The cloud server converts the voice signal into a switch signal and a wind speed adjustment control signal and outputs them to the networking module. The networking module sends the switch signal and the wind speed adjustment control signal to the control module.

[0026] Optionally, the portable fan at least includes a hand-held fan for hand-held use, a desktop fan for portability and desktop use, or a neck fan for hanging around the neck.

[0027] The technical effect of the embodiment of the present utility model is as follows: By combining the control module, the drive module, and the high-speed three-phase motor, this technical solution provides a portable fan solution with high efficiency, low noise, and adjustable wind speed. Through the low-voltage drive technology and control strategy, the portability and use comfort of the fan are improved, and the user experience is enhanced. Description of the Drawings

[0028] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic structural diagram of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0030] Figure 2 It is another schematic structural diagram of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0031] Figure 3 It is another schematic structural diagram of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0032] Figure 4 It is a circuit diagram of a touch sliding adjustment chip in a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0033] Figure 5 It is a circuit diagram of a touch screen connection socket in a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0034] Figure 6 It is a schematic diagram of the display interface of a control device in a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0035] Figure 7 It is a circuit diagram of a single-touch touch screen chip in a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0036] Figure 8 It is another schematic structural diagram of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0037] Figure 9 It is a schematic structural diagram of a voice module in a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0038] Figure 10 It is a circuit diagram of a voice acquisition module in a voice module of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0039] Figure 11It is the circuit diagram of the voice recognition module in the voice module of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0040] Figure 12 It is the schematic structural diagram of the voice output module in the voice module of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0041] Figure 13 It is the circuit diagram of the voice output module in the voice module of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0042] Figure 14 It is another schematic structural diagram of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0043] Figure 15 It is another schematic structural diagram of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0044] Figure 16 It is the schematic structural diagram of the drive module in a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0045] Figure 17 It is the schematic structural diagram of the motor in a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0046] Figure 18 It is the circuit diagram of the drive module in a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0047] Figure 19 It is another circuit diagram of the drive module in a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0048] Figure 20 It is another schematic structural diagram of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0049] Figure 21 It is the structural explosion diagram of an implementation manner of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0050] Figure 22 It is the structural explosion diagram of another implementation manner of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present utility model;

[0051] Figure 23It is an exploded view of the first part of another implementation of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present invention;

[0052] Figure 24 It is an exploded view of the second part of another implementation of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present invention;

[0053] Figure 25 It is an exploded view of the third part of another implementation of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present invention;

[0054] Figure 26 It is a schematic diagram of the structure of another implementation of a portable fan based on a high-speed three-phase motor provided by an embodiment of the present invention;

[0055] In the figure: 101, input module; 102, control module; 103, drive module; 104, high-speed three-phase motor; 105, rotational speed measurement module; 106, networking module; 107, cloud server; 111, touch control 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, wireless module; 203, atomization module; 204, refrigeration module; 205, heating module; 206, lighting module; 206, head shaking module; 301, first upper-bridge arm switching tube; 302, second lower-bridge arm switching tube; 303, third upper-bridge arm switching tube; 304, fourth lower-bridge arm switching tube; 305, fifth upper-bridge arm switching tube; 306, sixth lower-bridge arm switching tube; 311, first coil; 312, second coil; 313, third coil. Detailed implementation manners

[0056] To thoroughly understand the present invention, detailed structures and steps will be presented in the following description to explain the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other implementation manners.

[0057] An embodiment of the present invention provides a portable fan, which solves the problem in the prior art that with a mechanical switch, the user cannot adjust the wind speed of any gear according to needs, resulting in a poor user experience.

[0058] An embodiment of the present invention provides a portable fan based on a high-speed three-phase motor, as Figure 1As shown, it includes a control module 102, a drive module 103, and a high-speed three-phase motor 104. Among them, the operating voltage of the high-speed three-phase motor 104 is 2 to 18 volts, the operating current of the high-speed three-phase motor 104 is 0.1 to 10 amperes, and / or the rated operating power of the high-speed three-phase motor 104 is 0.5 to 100 watts; the control module 102 controls the rated operating speed of the high-speed three-phase 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 high-speed three-phase motor 104 and control the wind speed within a preset wind speed range.

[0059] Among them, through the collaborative work of the control module 102 and the drive module 103, this technical solution realizes the operation of the high-speed three-phase motor with low-voltage drive to meet the specific requirements of the portable fan. Among them, it is necessary to adjust the number of slots and the number of pole pairs to adapt to low-voltage operation, select high-performance iron core materials to reduce magnetic loss and improve the operating efficiency at low voltage, and set up an efficient inverter to convert low-voltage direct current into three-phase alternating current to ensure the stability of the power supply and avoid voltage fluctuations affecting the motor performance.

[0060] Among them, the range of the operating voltage is 2 to 18 volts, the range of the operating current is 0.1 to 10 amperes, and the range of the rated operating power is 0.5 to 100 watts. The design of the high-speed three-phase motor 104 can provide more efficient rotational speed and power output at low voltage compared to the motors of existing portable fans, and is suitable for the needs of portable devices. The control module 102 precisely controls the high-speed three-phase motor 104 according to the real-time monitored operating voltage, operating current, and rated operating power. By adjusting the power supply parameters of the high-speed three-phase motor 104, the control module 102 can effectively reduce the noise generated during the high-speed operation of the motor. The control module 102 can also adjust the wind speed of the fan to make it within the preset wind speed range, ensuring the use comfort and equipment stability compared to single-phase low-speed motors. The drive module 103 is connected to the control module 102 and the high-speed three-phase motor 104, and converts the instructions of the control module 102 into actual motor drive signals. The drive module 103 adopts efficient inverter technology to convert low-voltage direct current into alternating current suitable for the high-speed three-phase motor 104 to ensure the efficient operation of the motor. Under different working conditions, the drive module 103 adjusts the rotational speed and output power of the motor according to the instructions of the control module 102.

[0061] The technical effect of this embodiment is as follows: By combining the control module, the drive module, and the high-speed three-phase motor, this technical solution provides a portable fan solution that is efficient, low-noise, and has adjustable wind speed. Through low-voltage drive technology and precise control strategies, it not only improves the portability and comfort of use of the fan, but also effectively enhances the overall performance and energy efficiency of the device. This design solution is applicable to portable fan application scenarios that require high performance and low noise, filling the gap in the application of high-speed three-phase motors in small portable devices in the market.

[0062] The specific applications of this embodiment include but are not limited to the following implementation manners:

[0063] As an implementation manner, when the operating voltage of the high-speed three-phase motor 104 is 6 to 8.4 volts, the operating current of the high-speed three-phase motor 104 is 0.12 to 1 ampere, and / or the rated operating power of the high-speed three-phase motor 104 is 0.8 to 9 watt-hours, the control module 102 controls the rated operating speed of the high-speed three-phase motor 104 to be 6000 - 15000 RPM / MIN by controlling the drive module 103 according to the operating voltage, operating current, and / or rated operating power.

[0064] Among them, the high-speed three-phase motor 104 is driven by a voltage range of 6 - 8.4V, which is suitable for being powered by two batteries connected in series. The operating current range is 0.12 - 1A to ensure stable operation at different speeds, and the power range is 0.8W - 9W to meet the power requirements of the portable fan. The control module 102 monitors the operating voltage, current, and power of the motor in real time and adjusts according to these parameters. The control module 102 can precisely control the speed of the motor, and the adjustment range is 6000 - 15000 RPM. The drive module 103 converts the direct current of 6 - 8.4V into three-phase alternating current and drives the high-speed three-phase motor 104 through inverter technology. The battery uses two batteries connected in series to provide a stable voltage. The number of pole pairs of the fan is 4 pairs, the number of slots is 12 slots, the number of blades is 5 pieces, and the number of guide vanes / impellers is 6 pieces.

[0065] As an implementation manner, when the operating voltage of the high-speed three-phase motor 104 is 5.9 to 8.4 volts, the operating current of the high-speed three-phase motor 104 is 0.5 to 6 amperes, and / or the rated operating power of the high-speed three-phase motor 104 is 5 to 50 watt-hours, the control module 102 controls the rated operating speed of the high-speed three-phase motor 104 to be 20000 - 80000 RPM / MIN by controlling the drive module 103 according to the operating voltage, operating current, and / or rated operating power.

[0066] Among them, the high-speed three-phase 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, and is suitable for being powered by two batteries in series. The working current range is 0.5 - 6A, ensuring stable operation at different speeds. The power range is 5W - 50W, meeting the power requirements of the portable fan. The control module 102 monitors the working voltage, current, and power of the motor in real time and adjusts according to these parameters. The control module 102 can precisely control the speed of the motor, and the adjustment range is 20000 - 80000 RPM. The drive module 103 converts the direct current of 5.9 - 8.4V into three-phase alternating current and drives the high-speed three-phase motor 104 through inverter technology. The battery uses two batteries in series to provide a stable voltage. The number of pole pairs of the fan is 1 pair, the number of slots is 6 slots, the number of blades is 13 pieces, and the number of guide vanes / impellers is 6 pieces.

[0067] As an implementation manner, when the working voltage of the high-speed three-phase motor 104 is 2 to 5.8 volts, the working current of the high-speed three-phase motor 104 is 0.25 to 2 amperes, and / or the rated working power of the high-speed three-phase motor 104 is 1 to 8 watts, the control module 102 controls the rated working speed of the high-speed three-phase motor 104 to be 15000 - 41000 RPM / MIN by controlling the drive module 103 according to the working voltage, working current, and / or rated working power.

[0068] Among them, the high-speed three-phase motor 104 is driven by a voltage range of 2 - 5.8V, which can be 2V, 2.1V, 2.5V, 3.7,......, 4.3V, 5.8V, and is suitable for being powered by two batteries in series. The working current range is 0.25 - 1.8A, ensuring stable operation at different speeds. The power range is 1W - 8W, meeting the power requirements of the portable fan. The control module 102 monitors the working voltage, current, and power of the motor in real time and adjusts according to these parameters. The control module 102 can precisely control the speed of the motor, and the adjustment range is 15000 - 41000 RPM. The drive module 103 converts the direct current of 2 - 5.8V into three-phase alternating current and drives the high-speed three-phase motor 104 through inverter technology. The battery uses two batteries in series to provide a stable voltage. The number of pole pairs of the fan is 4 pairs, the number of slots is 9 slots, the number of blades is 9 pieces, and the number of guide vanes / impellers is 7 pieces.

[0069] As an implementation, when the operating voltage of the high-speed three-phase motor 104 is 8.5 to 12.6 volts, the operating current of the high-speed three-phase motor 104 is 0.5 to 5 amperes, and / or the rated operating power of the high-speed three-phase motor 104 is 6 to 60 watt-hours, the control module 102 controls the rated operating speed of the high-speed three-phase motor 104 to be 25000 - 85000 RPM / MIN through the drive module 103 according to the operating voltage, operating current, and / or rated operating power.

[0070] Among them, the high-speed three-phase motor 104 is driven in the voltage range of 8.5 - 12.6V, which can be 8.5V, 9.0V, 10.5V, 12.0V, ……, 12.6V, suitable for being powered by three batteries in series. The operating current range is 0.5 - 5A to ensure stable operation at different speeds. The power range is 6W - 60W to meet the power requirements of the portable fan. The control module 102 monitors the operating voltage, current, and power of the motor in real time and adjusts according to these parameters. The control module 102 can accurately control the speed of the motor, and the adjustment range is 25000 - 85000 RPM. The drive module 103 converts the direct current of 8.5 - 12.6V into three-phase alternating current and drives the high-speed three-phase motor 104 through inverter technology. The battery uses three batteries in series to provide a stable voltage. The number of pole pairs of the fan is 1 pair, the number of slots is 6 slots, the number of blades is 13 pieces, and the number of guide vanes / impellers is 6 pieces.

[0071] As an implementation, when the operating voltage of the high-speed three-phase motor 104 is 12 to 18 volts, the operating current of the high-speed three-phase motor 104 is 0.1 to 1 ampere, and / or the rated operating power of the high-speed three-phase motor 104 is 2 to 16 watt-hours, the control module 102 controls the rated operating speed of the high-speed three-phase motor 104 to be 2000 - 6000 RPM / MIN through the drive module 103 according to the operating voltage, operating current, and / or rated operating power.

[0072] Among them, the high-speed three-phase motor 104 is driven in the voltage range of 12 - 18V, which can be 12V, 12.5V, 14V, 16.8V, ……, 18V, suitable for being powered by four batteries in series. The operating current range is 0.1 - 1A to ensure stable operation at different speeds. The power range is 2W - 16W to meet the power requirements of the portable fan. The control module 102 monitors the operating voltage, current, and power of the motor in real time and adjusts according to these parameters. The control module 102 can accurately control the speed of the motor, and the adjustment range is 2000 - 6000 RPM. The drive module 103 converts the direct current of 12 - 16.8V into three-phase alternating current and drives the high-speed three-phase motor 104 through inverter technology. The battery uses four batteries in series to provide a stable voltage. The number of pole pairs of the fan is 4 pairs, the number of slots is 6 slots, the number of blades is 9 pieces, and the number of guide vanes / impellers is 10 pieces.

[0073] As an implementation manner, this implementation manner provides a portable fan, as Figure 2 shown, including: an input module 101, a control module 102, a drive module 103, and a high-speed three-phase motor 104 connected in sequence. The drive module 103 includes a first bridge arm, a second bridge arm, and a third bridge arm. On both sides of the midpoint of each bridge arm, there are an upper-bridge-arm switch tube and a lower-bridge-arm switch tube. The midpoint of each bridge arm is connected to one-phase coil of the high-speed three-phase motor 104. The input module 101 outputs a wind speed adjustment control signal according to a user instruction. The control module 102 generates a PWM control signal according to the wind speed adjustment control signal, and controls the switch tubes of each bridge arm through the PWM control signal to adjust the rotation speed of the high-speed three-phase motor 104.

[0074] Wherein, the input module 101 also outputs a switch signal according to a user instruction. The control module 102 generates a switch control signal according to the switch signal, and controls the switch tubes of each bridge arm through the switch control signal to drive the high-speed three-phase motor 104 to start running or stop running.

[0075] When the user's instruction is to turn on the fan, the input module 101 outputs a switch signal according to the user's instruction. When the user's instruction is to adjust the fan speed, the input module 101 outputs a wind speed adjustment control signal according to the user's instruction. The user can input control instructions in various ways according to the type of the input module 101. For example, the input module 101 can input instructions through touch, voice or other input methods. When the input module 101 is a touch module 111, when the input module 101 detects a touch action, it generates a switch signal. When the input module 101 detects a sliding action, it generates a wind speed adjustment signal. When the input module 101 is a voice module 112, the input module 101 captures the user's voice signal and converts it into a switch signal and a wind speed adjustment control signal. When the input module 101 is a networking module 106, it receives a remote control signal or a wind speed adjustment parameter set by the user. The input module 101 can also be a multi-functional input module, and various functions such as timing control, lighting control, shaking control, spraying control, and refrigeration control are implemented through the input module 101. The timing function means that the user sets the timing switch time through the touch module 111, or remotely sets the timing function through the voice module 112 and the networking module 106. The lighting control means that the user adjusts the lighting switch state, brightness and color through the touch module 111, or remotely controls the lighting through the voice module 112 and the networking module 106. The shaking function means that the user sets the shaking angle and speed of the fan through the touch module 111, or remotely controls the shaking function through the voice module 112 and the networking module 106. The spraying function means that the user turns on or adjusts the spraying amount through the touch module 111, or remotely controls the spraying function through the voice module 112 and the networking module 106. The refrigeration function means that the user adjusts the refrigeration intensity of the fan through the touch module 111, or remotely controls the refrigeration function through the voice module 112 and the networking module 106. Implementing various function controls through the input module enables the user to use and adjust the fan more flexibly and meet the requirements of different usage scenarios.

[0076] The input module 101 and the control module 102 are connected by wired or wireless means, and the input module is arranged on the portable fan housing or other electronic devices.

[0077] Among them, the input module 101 and the control module 102 are connected by wire, for example, connected by I2C connection line, SPI connection line, UART connection line, GPIO interface, USB interface, CAN bus, I2S interface, ADC interface. The I2C connection line (Inter-Integrated Circuit) is a serial communication protocol, commonly used to connect low-speed peripheral devices (such as touch modules) to the main board, and uses two lines (SDA and SCL) for data transmission and clock synchronization. The SPI connection line (Serial Peripheral Interface) is a high-speed synchronous serial communication protocol, and uses four lines (MISO, MOSI, SCK and SS) for data transmission. The UART connection line (Universal Asynchronous Receiver-Transmitter) is an asynchronous serial communication protocol, and uses two lines (Tx and Rx) for data transmission. The GPIO interface (General-Purpose Input / Output) is a general-purpose digital signal input / output interface, which can be configured as input or output mode. The USB interface (Universal Serial Bus) is a general-purpose high-speed serial communication interface, supporting plug-and-play and hot plugging. The CAN bus (Controller Area Network) is a serial communication protocol for industrial automation, with high reliability and real-time performance. The I2S interface (Integrated Interchip Sound) is a serial bus standard for audio data transmission. The ADC interface (Analog-to-Digital Converter) is an interface that converts analog signals into digital signals. Through wireless communication technologies, such as Wi-Fi, Bluetooth, Zigbee, etc., the signal transmission between the input module 101 and the control module 102 is realized. The input module 101 is directly integrated on the shell of the portable fan, suitable for occasions where users hope to operate directly on the fan, such as adjusting the wind speed through the touch screen or turning on / off the fan with a button. The input module 101 can also be separated from the portable fan and installed on other electronic devices (such as smartphones, tablets, smart watches, etc.), and connected to the control module of the fan wirelessly, making the control of the portable fan more flexible and convenient. Users can perform remote control through existing electronic devices. Among them, the wireless module can be a Bluetooth module, a Wi-Fi module, an infrared module, a 433MHz wireless module, and can also be the following wireless modules: Zigbee module, Z-Wave module, LoRa (Long Range) module, NFC (Near Field Communication), 2.4GHz dedicated wireless module, 5G, etc.The control module 102 receives the signals from the input module 101, processes the signals, generates switch control signals according to the switch signals to control the start and stop of the high-speed three-phase motor 104, and calculates the control signals for adjusting the portable fan according to the wind speed adjustment signals. The control signals include, but are not limited to, PWM (Pulse Width Modulation), PPM (Pulse Position Modulation), data protocols, or other custom protocols. Among them, the PWM signal is a commonly used control method, and the motor speed is adjusted by changing the duty cycle of the signal (i.e., the ratio of the high-level time to the period). The PPM signal transmits information by changing the position of the pulse within a cycle. The data protocol can be a standard communication protocol (such as I2C, SPI, UART) or a custom communication protocol for transmitting more complex control instructions. The custom protocol designs a specific control signal format and transmission method according to specific application requirements. If the input module 101 is the voice module 112, the control module 102 generates switch control signals and PWM control signals according to the switch signals and the wind speed adjustment control signals. If the input module 101 is the networking module 106, the control module 102 generates corresponding control signals according to the remote control signals. The drive module 103 consists of three bridge arms, each bridge arm includes an upper bridge arm switch tube and a lower bridge arm switch tube, and is connected to the phase coils of the high-speed three-phase motor 104. The control module 102 controls the switch tubes of each bridge arm through the switch control signals to start or stop the high-speed three-phase motor 104. The switch tubes of each bridge arm are controlled through the PWM control signals to adjust the speed of the high-speed three-phase motor 104. The start, stop, and speed of the motor can be controlled using the six-step commutation method. Only two MOS tubes are conducting at each moment, forming an effective current path to drive the motor. By controlling the three bridge arms (each bridge arm has two MOS tubes), six commutation states are achieved to drive the motor. Each commutation state corresponds to a pair of conducting MOS tubes, and the remaining MOS tubes remain off. The high-speed three-phase motor 104 receives the signals from the drive module 103, starts to operate, and provides the corresponding wind speed.

[0078] The technical effect of this embodiment is that: through the switch signals and the wind speed adjustment control signals output by the input module, the control module can generate switch control signals and PWM control signals. Users can adjust the operating state and wind speed of the fan according to their needs, realizing flexible wind speed adjustment; compared with the traditional mechanical switch method, this technical solution enables users to select the appropriate wind speed according to specific requirements, enhancing the convenience and comfort of use and improving the user experience.

[0079] As an implementation, such as Figure 3As shown, when the input module 101 is the touch module 111, the touch module 111 outputs a switch signal when a touch action is detected, and the control module 102 generates a switch control signal according to the switch signal; when the touch module 111 detects a sliding action, it outputs a wind speed adjustment signal, and the control module 102 calculates the duty cycle of the PWM signal according to the wind speed adjustment signal and generates a PWM control signal according to the duty cycle of the PWM signal.

[0080] Among them, the touch module 111 detects the touch and sliding actions of the user. When the user touches the touch module 111, the touch module 111 detects the touch action and generates a switch signal. When the user slides on the touch module 111, the touch module 111 detects the sliding parameters and generates a wind speed adjustment signal. The control module 102 receives and processes the switch signal and generates a switch control signal for controlling the start and stop of the high-speed three-phase motor 104. The control module 102 receives and processes the wind speed adjustment signal and calculates the required duty cycle of the PWM signal according to the wind speed adjustment signal.

[0081] Among them, the control module 102 calculates the duty cycle of the PWM signal using different calculation methods according to different sliding parameters. The sliding parameters can include the following: sliding distance: the distance that 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 sliding finger on the touch area.

[0082] Among them, taking the sliding distance as the main parameter, the specific steps for calculating the duty cycle are as follows:

[0083] When the user starts sliding on the touch area, record the starting position. When the user finishes sliding on the touch area, record the ending position. Use the distance between the starting position and the ending position as the sliding distance. For example, let the starting position be P1 and the ending position be P2. The sliding distance D can be expressed as: D = P2 - P1. Define the maximum sliding distance Dmax that the user may slide on the touch area. Compare the actual sliding distance D with the maximum sliding distance Dmax and calculate the sliding distance ratio R to ensure that R is between 0 and 1. Set the minimum and maximum values of the PWM signal duty cycle. For example, the minimum value is 0% and the maximum value is 100%. According to the sliding distance ratio, calculate the corresponding PWM signal duty cycle according to the corresponding relationship, and output the PWM control signal according to the PWM signal duty cycle. Send the generated PWM control signal to the drive module 103 to adjust the speed of the high-speed three-phase motor 104 and realize the change of wind speed.

[0084] Among them, taking the sliding time as the main parameter, the specific steps for calculating the duty cycle are as follows:

[0085] When the user slides on the touch panel, the touch module 111 detects the sliding action and records the start and end times of the slide. The touch module 111 transmits the slide time to the control module 102, and the control module 102 calculates the normalized slide time based on the slide time and generates the corresponding PWM duty cycle. The control module 102 sends the PWM signal to the drive module 103, and the drive module 103 controls the speed of the high-speed three-phase motor 104 by adjusting the switching frequency and duty cycle of the switching tube.

[0086] Among them, taking the click position as the main parameter, the specific steps for calculating the duty cycle are as follows:

[0087] When the user clicks on a certain position on the touch module 111, the touch module 111 detects the coordinates of the click position (such as X and Y coordinates), and the touch module 111 generates a wind speed adjustment signal with the click position coordinates as the click parameter. According to the different click positions, the control module 102 calculates the required PWM signal duty cycle. For example, the touch area is divided into multiple areas, and each area corresponds to a different wind speed gear. Assume that the touch area of the touch module 111 is divided into five equal parts, and clicking on each area corresponds to a wind speed gear: area 1 (the leftmost) is the low wind speed gear, area 2 (the middle) is the medium wind speed gear, and area 5 (the rightmost) is the high wind speed gear. The user clicks on the rightmost side (area 5) of the touch area, the touch module 111 detects the click position coordinates, and generates the corresponding wind speed adjustment signal. The control module 102 receives the wind speed adjustment signal and calculates the PWM signal duty cycle required for the high wind speed gear according to the click position (area 5). 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 high-speed three-phase motor 104 to the high wind speed gear by controlling the conduction time of the upper bridge arm switching tube and the lower bridge arm switching tube.

[0088] As an implementation manner, the touch control module 111 can adopt a touch-sliding adjustment chip, which includes multiple contacts. When the user operates the fan through the touch screen, the touch-sliding adjustment chip will detect the touch action through these contacts. If the pressure brought by the touch action is detected, the touch control module 111 generates a switch signal. The touch-sliding adjustment chip transmits the switch signal to the control module 102. After receiving the switch signal, the control module 102 generates a switch control signal to control the switching tube in the drive module 103, so as to start or stop the high-speed three-phase motor 104, that is, turn on or off the fan. In addition to detecting the touch action, the touch-sliding adjustment chip can also detect the sliding parameters of the user on the touch screen, including the sliding gesture, sliding distance, sliding speed, sliding times, and sliding time, etc. These parameters are transmitted to the control module 102 through the touch control module 111. The control module 102 generates a corresponding PWM control signal according to the preset logic, so as to adjust the wind speed of the portable fan. The control module 102 generates a corresponding PWM control signal according to the sliding parameters. The PWM control signal is used to control the switching tube in the drive module 103 to adjust the rotation speed of the high-speed three-phase motor 104, so as to achieve the adjustment of the wind speed.

[0089] Among them, there are multiple contacts on the touch-sliding adjustment chip. When the user performs a touch-sliding operation on the contacts, the chip will detect the touch action and sliding parameters (such as sliding distance, sliding speed, etc.). The sliding parameters detected by the chip include the distance and speed of the user sliding on the touch screen, and these parameters reflect the degree to which the user hopes to adjust the wind speed. According to the detected sliding parameters, the touch-sliding adjustment chip generates a wind speed adjustment control signal. After receiving the wind speed adjustment control signal, the control module calculates the duty cycle of the corresponding PWM signal according to the magnitude of the signal. The higher the duty cycle, the higher the motor speed; the lower the duty cycle, the lower the motor speed. The control module sends the generated PWM signal to the drive module, and the drive module controls the rotation speed of the motor. By adjusting the duty cycle of the PWM signal, precise control of the motor rotation speed is achieved, so as to adjust the wind speed of the fan.

[0090] As an example, as Figure 4 shown, U5 is a touch control chip. The pins PA0 to PA4 of the touch control chip U5 can be connected to the control module 102 through the above connection method. The touch control chip U5 includes at least contacts K2, K3, K4, K5, K6, and K7. Each contact can detect the touch action, and different contacts can cooperate to detect sliding parameters such as sliding gesture, sliding distance, sliding speed, sliding times, and sliding time.

[0091] The technical effect of this embodiment is as follows: Compared with the traditional portable fan that only has a single way of controlling gears with a mechanical switch, this embodiment realizes a more diverse control method through the touch module. Users can not only turn on and off the fan simply by touching, but also flexibly adjust the wind speed through sliding operations. The application of the touch and slide adjustment chip makes the operation of the fan more convenient and intuitive. Users do not need to repeatedly press the mechanical switch, and can easily control the on / off and wind speed of the fan just by touching and sliding, improving the operation efficiency and user experience of the users. The control module generates an accurate PWM control signal according to the detected sliding parameters, which can achieve precise control of the fan's wind speed. Users can flexibly adjust the wind speed according to their needs and obtain a more comfortable user experience.

[0092] As a second embodiment of the touch module 111, the touch module 111 can be a touch screen chip, including single-touch, multi-touch, touch screen, etc. The touch and slide screen chip includes a switch area and a slide area. The touch and slide screen chip generates a switch touch signal through the switch area and generates a corresponding wind speed adjustment control signal when a slide parameter is detected through the slide area.

[0093] Among them, the touch module 111 of the portable fan adopts a touch screen chip, which includes a switch area and a slide area. When the user touches the switch area, the touch screen chip will detect the touch action and generate a switch signal. When the user performs a slide operation in the slide area, the touch screen chip will detect the slide parameter and generate a corresponding wind speed adjustment control signal. The touch module 111 sends the generated switch signal and wind speed adjustment control signal to the control module 102. After receiving the switch signal, the control module 102 generates a switch control signal, and controls the switch tubes of each arm through this signal to start or stop the motor. After receiving the wind speed adjustment control signal, the control module 102 generates a PWM control signal, and controls at least one switch tube of each arm through this signal to adjust the speed of the high-speed three-phase motor 104 and achieve wind speed adjustment.

[0094] As an example, Figure 5 As shown, pins 5 to 9 of the touch screen connector P2 are connected to the touch screen, and pins 12 to 15 of the touch screen connector P2 can be connected to the control module 102 through the above connection method. Figure 6 As shown, a control interface is displayed on the screen of the mobile terminal. The control interface includes a power on / off button, a speed adjustment button, a timed shutdown button, an air purification button, an atmosphere light button, and a fan abnormality reminder. Different functions are realized by clicking the buttons. This is only an example here and does not limit the present application.

[0095] The technical effect of this embodiment is that: through the touch screen chip, users can easily achieve the on / off control and wind speed adjustment of the fan. The operation is simple and intuitive, meeting the various needs of users. The touch screen chip can achieve flexible on / off and wind speed adjustment through the detection of the switch area and the sliding area. Users can precisely control the wind speed of the fan according to their needs, providing a more comfortable user experience. The use of the touch screen enhances the technological sense and modernity of the portable fan, improves the user experience, and makes the product more competitive in the market.

[0096] As a third embodiment of the touch control module 111, the touch control module 111 includes a plurality of single-contact touch chips connected in parallel. When the touch control module 111 detects a touch action through any one contact, it generates a switch touch signal, and when it detects sliding parameters through multiple contacts, it generates a corresponding wind speed adjustment control signal.

[0097] Among them, the touch control module 111 of the portable fan includes a plurality of single-contact touch chips or multiple paths of contacts integrated into one chip. When the user touches any one single-contact touch chip, this chip will generate a switch signal; when the user slides on the touch screen, multiple single-contact touch chips will detect the sliding parameters and generate corresponding wind speed adjustment control signals. The touch control module 111 sends the generated switch touch signal and wind speed adjustment control signal to the control module 102. After receiving the switch touch signal, the control module 102 generates a conduction level signal, and through this signal, it controls the switching tubes of each arm to make the motor start or stop running. After receiving the wind speed adjustment control signal, the control module 102 generates a PWM control signal, and through this signal, it controls at least one switching tube of each arm to adjust the speed of the high-speed three-phase motor 104 to achieve wind speed adjustment.

[0098] As an example, 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 via resistor R10. Pin 3 of the single-contact touch chip U3 is connected to a contact K1 via resistor R11. The above functions can be achieved by connecting multiple single-contact touch chips in parallel.

[0099] The technical effect of this embodiment is that: through multiple single-contact touch chips connected in parallel, users can easily achieve the on / off control and wind speed adjustment of the fan. The operation is simple and intuitive, meeting the various needs of users. The touch sliding adjustment chip can achieve flexible wind speed adjustment through the detection of multiple single contacts. Users can precisely control the wind speed of the fan according to their needs, providing a more comfortable user experience. The use of the touch screen enhances the technological sense and modernity of the portable fan, improves the user experience, and makes the product more competitive in the market.

[0100] As an embodiment, Figure 8As 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.

[0101] Among them, the user issues voice commands through the voice module 112, such as "turn on the fan", "turn off the fan" or "increase the wind speed", etc. The microphone of the voice module 112 captures the user's voice signal. The voice module 112 transmits the captured voice signal to the voice recognition unit, and the voice recognition unit converts the voice signal into corresponding switch signal and wind speed adjustment control signal. The voice module 112 sends the switch signal and the wind speed adjustment control signal to the control module 102. The control module 102 generates corresponding control signals according to the switch signal and the wind speed adjustment control signal: if the command is "turn on the fan" or "turn off the fan", the command corresponds to the switch signal, and the control module 102 generates a switch control signal; if the command involves wind speed adjustment "increase the wind speed", the command corresponds to the wind speed adjustment control signal, and the control module 102 generates a PWM control signal. The control module 102 controls the switch tube in the drive module 103 through the switch control signal to drive the high-speed three-phase motor 104 to start or stop. The control module 102 adjusts the duty cycle of the PWM signal according to the wind 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 rotation speed of the high-speed three-phase motor 104 by adjusting the switching frequency and duty cycle of the upper-bridge arm or lower-bridge arm switch tube.

[0102] The technical effect of this embodiment is that the user can conveniently control the portable fan through voice commands without manually operating the mechanical switch or the touch panel, and the operation is more convenient. By controlling the rotation speed of the motor through the PWM signal, the smoothness and accuracy of the wind speed adjustment are ensured, so that the user can obtain a better use experience.

[0103] For the voice module 112, as an embodiment, as Figure 9 shown, the voice module 112 includes a voice collection module 121, a voice recognition module 122 and a voice output module 123. The voice recognition module 122 is respectively connected to the voice collection module 121, the voice output module 123 and the control module 102; the voice collection module 121 captures the user's voice signal, 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, and the voice recognition module 122 also controls the voice output module 123 to output or not output the execution result according to the feedback result of the control module 102.

[0104] Among them, the voice acquisition module 121 is responsible for capturing the user's voice signal, usually composed of a microphone, and is used to convert the user's voice input into an electrical signal form. The voice recognition module 122 converts the captured voice signal into a switch signal and a wind speed adjustment control signal. Using voice recognition algorithms and technologies, the voice signal is processed into recognizable signal instructions, 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 digital feature vector. This step can use technologies such as MFCC (Mel Frequency Cepstral Coefficients) to extract the features in the voice signal. Based on a large amount of labeled voice data, a voice recognition model is trained. Commonly used technologies include Hidden Markov Model (HMM), deep learning models (such as Recurrent Neural Network RNN, Long Short-Term Memory Network LSTM), etc. The feature vector is input into the voice recognition model for recognition and decoding, and the model maps the feature vector sequence to an instruction sequence. The decoded instruction is output. The voice type can be to indicate the turning on or off of the fan. For example, turning on the fan corresponds to 0x01, and turning off the fan corresponds to 0x02. The voice type can be to indicate the speed adjustment of the fan. For example, increasing the wind speed corresponds to 0x03, and decreasing the wind speed corresponds to 0x04. The voice type can be a specific wind speed level, directly setting the wind speed level. For example, low speed corresponds to 0x10, medium speed corresponds to 0x11, and high speed corresponds to 0x12. In addition, other words can be used to replace turning on the fan, turning off the fan, increasing the wind speed, and decreasing the wind speed above. The signal output by the voice module 112 can be a single-byte or multi-byte data packet, specifically depending on the complexity of the instruction and the design of the system. For example, the single-byte signal can be 0x01 (indicating turning on the fan), and the multi-byte signal can be 0x01 0x02 (indicating turning on the fan and setting it to the second wind speed level).

[0105] As an example, when the user says "turn on the fan", the voice module 112 recognizes the instruction and generates the signal 0x01, and the voice module 112 sends the signal 0x01 to the control module 102. When the user says "increase the wind speed", the voice module 112 recognizes the instruction and generates the signal 0x03, and the voice module 112 sends the signal 0x03 to the control module 102. When the user says "set the wind speed to medium speed", the voice module 112 recognizes the instruction and generates the signal 0x11, and the voice module 112 sends the signal 0x11 to the control module 102.

[0106] As an example, such as Figure 10 and Figure 11As shown in the figure, the voice acquisition module 121 includes a microphone MIC, a resistor R23, a resistor R24, a capacitor C27, and a capacitor C28. The first end of the microphone MIC is respectively connected to the second end of the resistor R24 and the second end of the capacitor R27. The second end of the microphone MIC is respectively connected to the second end of the resistor R23 and the second end of the capacitor R28. The voice recognition module 122 includes a voice recognition chip U1. The pin 1 of the voice recognition chip U1 is connected to one end of the capacitor C21. The pin 2 of the voice recognition chip U1 is respectively connected to one end of the capacitor C20 and one end of the resistor R20. The other end of the capacitor C20 and the anode of the voltage stabilizing diode D1 are commonly connected to the ground. The other end of the resistor R20 and the cathode of the voltage stabilizing diode D1 are commonly connected to the high level. The pin 3 of the voice recognition chip U1 is connected to one end of the capacitor C24. The pin 4 of the voice recognition chip U1 is connected to one end of the capacitor C25. The pin 5 of the voice recognition chip U1, the other end of the capacitor C24, and the other end of the capacitor C25 are commonly connected to the ground. The pin 24 of the voice recognition chip U1, one end of the capacitor C22, one end of the capacitor C23, and the other end of the capacitor C21 are commonly connected to the same level. The pin 23 of the voice recognition chip U1 is connected to the other end of the capacitor C22. The pin 22 of the voice recognition chip U1 is connected to the other end of the capacitor C23. The pins 22, 21, and 20 of the voice recognition chip U1 are respectively connected to A1, A2, and A3 of the voice acquisition module 121.

[0107] The working process of this circuit is as follows: The microphone MIC collects the voice input of the user. The capacitors C27 and C28 convert the voice input of the user into an electrical signal form and output it to the voice recognition chip U1. The voice recognition chip U1 converts the captured voice signal into a switch signal and a wind speed adjustment control signal.

[0108] The technical effect of this embodiment lies in that through voice input and output, the user interaction and friendliness of the device are improved, enabling the user to easily control the start / stop and speed adjustment of the fan through voice commands without directly contacting the device. Voice control endows the fan with more functions, such as intelligent operation and customized voice settings according to the user's voice commands, enhancing the intelligence level and user experience of the device.

[0109] For the voice output module 123, as an embodiment, as Figure 12 shown, the voice output module 123 includes a power amplifier module 1131 and a speaker 1132. The power amplifier module 1131 is respectively connected to the voice recognition module 122 and the speaker 1132.

[0110] 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 for output.

[0111] As an example, 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 respectively connected to the pins 16 and 17 of the voice recognition chip U1. The power amplifier chip U2 is responsible for amplifying the voice signal and outputting the voice from the speaker S1.

[0112] The technical effect of this embodiment is that: through the power amplifier module, it can be ensured that the voice signal will not be lost or distorted during the transmission process, and it can drive the speaker with sufficient volume, so that the user can clearly hear the voice output result.

[0113] As an embodiment, Figure 14 As shown, the portable fan further includes a networking module 106. The networking module 106 is respectively connected to the voice module 112 and the control module 102; the voice module 112 uploads the voice signal to the cloud server 107 through the networking module 106. The cloud server 107 converts the voice signal into a switch signal and a wind speed adjustment control signal and outputs them to the networking module 106. The networking module 106 sends the switch signal and the wind speed adjustment control signal to the control module 102.

[0114] Among them, through the networking method, the voice recognition service and remote control function of the cloud server 107 can be utilized to further improve the recognition accuracy and flexibility of the system. The specific steps are as follows: Use the microphone to capture the user's voice signal. The voice signal is transmitted to the networking module 106 through analog-to-digital conversion. The networking module 106 uploads the captured voice signal to the cloud server 107 for voice recognition service. The cloud server 107 converts the voice signal into a switch signal and a wind speed adjustment control signal and returns them to the networking module 106. The networking module 106 sends the switch signal and the wind speed adjustment control signal returned by the cloud to the control module 102, and the control module 102 generates corresponding control signals. The control module 102 generates a switch control signal according to the voice instruction, such as "turn on the fan" or "turn off the fan", or other switch instructions can also be customized to increase the convenience and interest of use. For example, possible customized switch instructions: "turn on the wind", "turn off the wind", "start blowing", "I'm hot, turn on the fan", etc. These instructions can be further expanded according to the user's usage habits and preferences to improve the interaction experience. Generate a switch control signal according to the voice instruction. The control module 102 calculates the duty cycle of the corresponding PWM signal according to the voice instruction, such as "increase the wind speed" or "decrease the wind speed", and generates a PWM control signal. The drive module 103 drives the motor according to the received switch control signal and PWM control signal to control the on / off and wind speed adjustment of the fan.

[0115] The technical effects of this embodiment are as follows: Since speech recognition is performed on the cloud server, the cloud server has stronger computing power and more efficient speech recognition algorithms, which can more accurately recognize the user's voice commands and improve the recognition accuracy; the speech recognition task is completed on the cloud, reducing the computing burden on the portable fan device, enabling the device to adopt a lower-cost hardware configuration, and at the same time extending the battery life; the addition of the networking module enables the portable fan to be linked with other smart devices to achieve remote control and data analysis, further enhancing the user experience and the intelligence level of the device.

[0116] As an embodiment, as Figure 15 shown, the portable fan further includes a rotational speed measurement module 105. The rotational speed measurement module 105 is respectively connected to the high-speed three-phase motor 104 and the control module 102; the rotational speed measurement module 105 is used to measure the actual rotational speed of the high-speed three-phase motor 104 and send it to the control module 102. The control module 102 obtains the rotational speed change amount according to the actual rotational speed and the target rotational speed, and adjusts the duty ratio of the PWM signal according to the rotational speed change amount, and outputs the adjusted PWM control signal to the drive module 103.

[0117] Among them, 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. It can be achieved through the following steps: The incremental PID control algorithm adjusts the control quantity by calculating the current and previous errors, thereby achieving precise control of the system, including three parts: proportional (P), integral (I), and derivative (D): Proportional control (P): Proportional regulation of the current error; Integral control (I): Cumulative regulation of past errors; Derivative control (D): Regulation of the change rate of the current error. Initialize the PWM module and the timer, set the parameters required for the PID control algorithm (proportional coefficient Kp, integral coefficient Ki, derivative coefficient Kd), obtain sensor data. The rotational speed measurement module 105 can be a magnetic encoder or a Hall sensor, which measures the rotational speed of the motor in real time and feeds it back to the control module 102. The control module 102 calculates the current error according to the set target rotational speed and the actually measured rotational speed, calculates the incremental control quantity according to the current error, adjusts the PWM duty ratio, outputs the PWM signal, and controls the rotational speed of the high-speed three-phase motor 104.

[0118] The technical effects of this embodiment are as follows: The PID control algorithm adjusts the control quantity according to the error, can accurately track the set value, and quickly stabilizes the motor speed near the target value. The PID control algorithm quickly responds to the error change, can adjust the PWM signal in a timely manner when the load changes, ensuring the flexibility and accuracy of the wind speed adjustment, and precisely adjusting the PWM control signal through the PID control algorithm, enabling the wind speed to smoothly transition.

[0119] As an implementation manner, when the control module 102 detects that the operating voltage changes, it maintains the operating voltage within a constant voltage range by boosting or bucking the voltage.

[0120] When the control module 102 detects that the operating voltage changes, to maintain the stability of the 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. When it detects that the voltage deviates from the preset range (such as 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 enables the boost circuit to boost the voltage to within the set range. Conversely, when the input voltage is higher than the set range, the control module 102 enables the buck circuit to reduce the voltage to within the set range. Through the feedback loop, the control module 102 can adjust the boost or buck degree in real time to ensure that the output voltage is constant within the preset range.

[0121] As an implementation manner, when the control module 102 detects that the operating current changes, it maintains the operating current within a constant current range by adjusting the PWM control signal.

[0122] When the control module 102 detects that the operating current changes, it maintains the current within a constant range by adjusting the PWM (pulse width modulation) control signal. The control module 102 continuously monitors the operating current of the motor. When it detects that the current deviates from the preset range (such as 0.12 - 1A), it triggers the current regulation mechanism. The control module 102 changes the input power of the motor by adjusting the duty cycle of the PWM signal. For example, when it detects that the current is lower than the preset range, it increases the PWM duty cycle to increase the input power and increase the current. Conversely, when the current is higher than the preset range, it reduces the PWM duty cycle to reduce the input power and reduce the current. Through the feedback of the current sensor, the control module 102 adjusts the duty cycle of the PWM signal in real time to ensure that the operating current remains within a constant range.

[0123] As an implementation manner, when the control module 102 detects that the operating power changes, it maintains the operating power stable by adjusting the operating voltage or the operating current.

[0124] The control module 102 continuously monitors the operating power of the motor (P = V × I). When the detected power deviates from the set value, it triggers the power regulation mechanism. By controlling the boost or buck converter, the input voltage is adjusted to restore the power to the set value. For example, when the power is lower than the set value, the input voltage is increased to increase the power; when the power is higher than the set value, the input voltage is decreased to reduce the power. By adjusting the PWM signal, the current is changed to restore the power to the set value. For example, when the power is lower than the set value, the PWM duty cycle is increased to increase the current and the power; when the power is higher than the set value, the PWM duty cycle is decreased to reduce the current and the power. Through signal feedback control, the control module 102 adjusts the voltage or current in real time to ensure that the operating power remains within a constant range.

[0125] In the above embodiments, the control module ensures the stable operation of the motor under various operating conditions by continuously monitoring the operating voltage, current, and power of the motor and through the corresponding adjustment mechanisms, improving the efficiency and performance of the motor and ensuring the reliability and stability of the portable fan in different environments.

[0126] For the drive module 103, as an embodiment, as Figure 16 and Figure 17 shown, the first bridge arm includes the first upper bridge arm switch tube 301 and the second lower bridge arm switch tube 302, the second bridge arm includes the third upper bridge arm switch tube 303 and the fourth lower bridge arm switch tube 304, the third bridge arm includes the fifth upper bridge arm switch tube 305 and the sixth lower bridge arm switch tube 306. The midpoint of the first bridge arm is connected to the first coil 311, the midpoint of the second bridge arm is connected to the second coil 312, and the midpoint of the third bridge arm is connected to the third coil 313; the first upper bridge arm switch tube 301, the first coil 311, the second coil 312, and the fourth lower bridge arm switch tube 304 form a first loop; the first upper bridge arm switch tube 301, the first coil 311, the third coil 313, and the sixth lower bridge arm switch tube 306 form a second loop; the third upper bridge arm switch tube 303, the second coil 312, the third coil 313, and the sixth lower bridge arm switch tube 306 form a third loop; the third upper bridge arm switch tube 303, the second coil 312, the first coil 311, and the second lower bridge arm switch tube 302 form a fourth loop; the fifth upper bridge arm switch tube 305, the third coil 313, the first coil 311, and the second lower bridge arm switch tube 302 form a fifth loop; the fifth upper bridge arm switch tube 305, the third coil 313, the second coil 312, and the fourth lower bridge arm switch tube 304 form a sixth loop.

[0127] Among them, the first bridge arm includes a first upper-bridge-arm switching tube 301 and a second lower-bridge-arm switching tube 302, and the midpoint is connected to a first coil 311. The second bridge arm includes a third upper-bridge-arm switching tube 303 and a fourth lower-bridge-arm switching tube 304, and the midpoint is connected to a second coil 312. The third bridge arm includes a fifth upper-bridge-arm switching tube 305 and a sixth lower-bridge-arm switching tube 306, and the midpoint is connected to a third coil 313. A total of six loops are formed, and each loop consists of a switching tube and a coil. The control module 102 controls each loop to conduct one by one through a switching control signal to drive the motor to start running. The control module 102 generates a switching control signal according to the received switching signal, and the switching control signal is used to control the switching tubes in each loop one by one. Specifically, the switching tubes in each bridge arm are turned on one by one according to the control of the switching control signal, so as to drive the phase coils of each motor through current. As the switching tubes in each bridge arm are gradually turned on, current flows through the respective phase coils, and the motor starts to rotate. Gradually turning on the six loops means starting each motor phase in the fan in sequence, thereby starting the entire fan system. Specifically, the switching tubes in each of the six loops are turned on in sequence to make each loop conduct. The first loop to the sixth loop conduct in sequence, and the fan rotates forward. The sixth loop to the first loop conduct in sequence, and the fan rotates in reverse.

[0128] After the control module 102 receives a wind speed adjustment control signal, it generates a PWM control signal. For each loop, the PWM control signal is used to adjust its corresponding switching tube, and thus adjust the rotation speed of the motor.

[0129] As an implementation manner, the control module also controls the on-time of the switching tubes in each loop through the PWM control signal to adjust the rotation speed of the motor.

[0130] Among them, the control module receives the wind speed adjustment control signals from the touch module or the voice module, and these signals contain the adjustment instructions of the user for the fan speed. The control module 102 generates corresponding pulse width modulation (PWM) control signals according to the wind speed adjustment control signals. The duty cycle of the PWM signal (i.e., the proportion of the high-level duration in the whole cycle) directly corresponds to the required fan speed. The control module 102 applies the generated PWM control signals to the two switching tubes in each loop, and the specific operation is as follows: The switching tubes in each loop perform switching operations according to the duty cycle of the PWM signal. When it is at a high level, the switching tube conducts; when it is at a low level, the switching tube turns off. By adjusting the duty cycle of the PWM signal, the conduction time of the switching tubes in each loop is controlled, so as to adjust the current flowing through the motor coil. The rotational speed of the motor is proportional to the current intensity in the motor coil. By adjusting the conduction time of the switching tubes in each loop, the control module 102 can precisely control the current of the high-speed three-phase motor 104, so as to adjust the rotational speed of the high-speed three-phase motor 104. By gradually increasing or decreasing the duty cycle of the PWM signal, the rotational speed of the fan can be accelerated or decelerated, realizing the adjustment of the wind speed of the fan.

[0131] The technical effect of this embodiment is that: the control module generates corresponding PWM control signals according to the received wind speed adjustment control signals. The duty cycle of the PWM signal directly determines the conduction time of the switching tubes in each loop, and further controls the current of the motor coil. Therefore, the rotational speed of the motor can be precisely adjusted by adjusting the duty cycle of the PWM signal.

[0132] As an embodiment, the portable fan further includes an energy feedback circuit. The energy feedback circuit is connected to the control module, the motor and the energy storage unit. When the control module detects that the PWM duty cycle decreases, it controls the energy feedback circuit to start working. The back electromotive force generated when the motor decelerates is converted into electrical energy through the 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. After receiving the energy feedback signal, the control switch conducts, converts the kinetic energy of the motor into electrical energy through the rectifier circuit, and stores it in the super capacitor or battery.

[0133] As an example, the portable fan is running at a high speed. At this time, the user reduces the wind speed or stops the fan through the input module. The control module detects the wind speed adjustment signal or the switch signal, reduces the duty cycle of the PWM signal, and makes the motor decelerate. The control module generates an energy feedback signal and controls the energy recovery circuit to start. The back electromotive force generated when the motor decelerates is converted into electrical energy through the rectifier circuit, and the converted electrical energy is stored in the super capacitor or battery. When the fan starts again, the control module detects the start signal, controls the energy storage unit to release electrical energy, and supplies power to the motor, reducing the consumption of the external power supply.

[0134] The technical effects of this embodiment are as follows: Through energy recovery, kinetic energy can be converted into electrical energy and stored when the fan decelerates or stops, reducing energy waste; reducing dependence on external power sources, extending the battery usage time, and improving the endurance of the portable fan; users can enjoy more stable and lasting wind speed adjustment during use, improving the overall user experience.

[0135] As an embodiment, 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 respectively output a switch signal and a wind speed adjustment control signal according to user instructions, and the control module 102 respectively generates a switch control signal and a PWM control signal according to the switch signal and the wind speed adjustment control signal.

[0136] The technical effects of this embodiment are as follows: The combination of the voice module and the touch module enables users to select the most suitable operation method according to their own preferences, increasing the intelligence of the product.

[0137] As an embodiment, 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 on and off the touch module according to user instructions and outputs a switch signal, and the touch module 111 outputs a wind speed adjustment control signal. The control module 102 respectively generates a switch control signal and a PWM control signal according to the switch signal and the wind speed adjustment control signal.

[0138] Among them, the user sends commands to turn on or off the touch module to the voice module 112 through voice instructions, and the voice module 112 transmits these instructions to the control module 102. The user sends commands to turn the fan on or off to the voice module 112 through voice instructions, and the voice module 112 generates a switch signal according to the user's instructions and transmits it to the control module 102. When the touch module 111 is enabled, the user inputs commands for wind speed adjustment to the touch module 111 through touch operations (such as swiping or clicking), and the touch module 111 generates a wind speed adjustment control signal according to the user's operations and transmits it to the control module 102. The control module 102 enables or disables the touch module 111 according to the instructions of the voice module 112. When the touch module 111 is disabled, all touch operations will not generate a wind speed adjustment control signal, thus avoiding misoperations. After receiving the switch signal, the control module 102 generates a switch control signal for controlling the turning on or off of the fan. After receiving the wind speed adjustment control signal, the control module 102 calculates the corresponding PWM signal duty cycle and generates a PWM control signal for controlling the rotation speed of the motor.

[0139] The technical effects of this embodiment are as follows: By enabling or disabling the touch module through voice commands, when the user holds the handheld fan, they can disable the touch module through voice to avoid accidental touch-induced misoperation of the wind speed adjustment, improving the user's operation experience and the product's safety; the on / off signal generated by the voice module is processed by the control module to ensure the accurate on / off operation of the fan; in the enabled state, the touch module generates a wind speed adjustment control signal through the user's touch operation, and the control module generates a high-precision PWM control signal based on this signal to achieve precise adjustment of the fan speed and meet the personalized needs of the user.

[0140] As an example, as Figure 18 shown, it is the circuit diagram of the drive module 103. The drive module 103 includes a first drive sub-module, a second drive sub-module, and a third drive sub-module.

[0141] The first drive sub-module includes MOS transistors Q1, Q2, Q7, capacitors C16, C21, C27, resistors R20, R24, R25, and R26. The first ends of capacitor C16, resistor R24, the source of MOS transistor Q2, the first end of capacitor C21, and the first end of capacitor C27 are connected together and connected to the power supply. The second end of capacitor C16 is respectively connected to the second end of resistor R24, the drain of MOS transistor Q1, and the gate of MOS transistor Q2. The gate of MOS transistor Q1 is respectively connected to the first end of resistor R20 and the first control signal terminal U_H. The source of MOS transistor Q1 is connected to the second end of resistor R20 and grounded together. The drain of MOS transistor Q2 is respectively connected to the drain of MOS transistor Q7 and the first end of the first coil. The gate of MOS transistor Q7 is respectively connected to the first end of resistor R25 and the second control signal terminal U_L. The source of MOS transistor Q7 is respectively connected to the second end of resistor R25 and the first end of resistor R26. The second ends of capacitor C21 and capacitor C27 are connected together and grounded.

[0142] The second drive sub-module includes MOS transistor Q3, MOS transistor Q4, MOS transistor Q8, capacitor C26, capacitor C25, resistor R32, resistor R34, resistor R35, and resistor R38. The first terminal of capacitor C26, the first terminal of resistor R34, the source electrode of MOS transistor Q4, and the first terminal of capacitor C25 are connected together and connected to the power supply. The second terminal of capacitor C26 is respectively connected to the second terminal of resistor R34, the drain electrode of MOS transistor Q3, and the gate electrode of MOS transistor Q4. The gate electrode of MOS transistor Q3 is connected to the first terminal of resistor R32 and the third control signal terminal V_H. The source electrode of MOS transistor Q3 and the second terminal of resistor R32 are connected to the ground together. The drain electrode of MOS transistor Q4 is respectively connected to the drain electrode of MOS transistor Q8 and the first terminal of the second coil. The gate electrode of MOS transistor Q8 is respectively connected to the first terminal of resistor R35 and the fourth control signal terminal V_L. The source electrode of MOS transistor Q8 is respectively connected to the second terminal of resistor R35 and the first terminal of resistor R38. The second terminal of capacitor C25 is connected to the ground.

[0143] The third drive sub-module includes MOS transistor Q5, MOS transistor Q6, MOS transistor Q9, capacitor C32, capacitor C35, resistor R42, resistor R46, resistor R49, and resistor R51. The first terminal of capacitor C32, the first terminal of resistor R46, the source electrode of MOS transistor Q6, and the first terminal of capacitor C35 are connected together and connected to the power supply. The second terminal of capacitor C32 is respectively connected to the second terminal of resistor R46, the drain electrode of MOS transistor Q5, and the gate electrode of MOS transistor Q6. The gate electrode of MOS transistor Q5 is connected to the first terminal of resistor R42 and the fifth control signal terminal W_H. The source electrode of MOS transistor Q5 and the second terminal of resistor R42 are connected to the ground together. The drain electrode of MOS transistor Q6 is respectively connected to the drain electrode of MOS transistor Q9 and the first terminal of the third coil. The gate electrode of MOS transistor Q9 is respectively connected to the first terminal of resistor R49 and the sixth control signal terminal W_L. The source electrode of MOS transistor Q9 is respectively connected to the second terminal of resistor R49 and the first terminal of resistor R51. The second terminal of capacitor C25 is connected to the ground. The second terminal of resistor R26, the second terminal of resistor R38, and the second terminal of resistor R51 are connected together to the ground.

[0144] Among them, the power supply, MOS transistor Q2, the first coil, the second coil, MOS transistor Q8, and resistor R38 form a first loop; the power supply, MOS transistor Q2, the first coil, the third coil, MOS transistor Q9, and resistor R51 form a second loop; the power supply, MOS transistor Q4, the second coil, the third coil, MOS transistor Q9, and resistor R51 form a third loop; the power supply, MOS transistor Q4, the second coil, the first coil, MOS transistor Q7, and resistor R26 form a fourth loop; the power supply, MOS transistor Q6, the third coil, the first coil, MOS transistor Q7, and resistor R26 form a fifth loop; the fifth upper-bridge arm switch transistor, the third coil, the second coil, MOS transistor Q8, and resistor R38 form a sixth loop.

[0145] Among them, MOS transistors Q2, Q4, and Q6 can be NMOS transistors or PMOS transistors. In addition to the driving method shown in the circuit diagram for the half-bridge driving of MOS transistors Q2, Q4, and Q6, other driving methods can also be adopted, such as capacitive energy storage driving, transformer coupling driving, optocoupler driving, and so on.

[0146] The control module 102 inputs switching control signals to the two switching transistors in each loop through the first to sixth control signal terminals. The control module 102 controls the first to sixth loops to conduct sequentially according to a preset order through the switching control signals to drive the motor to start running. The control module 102 inputs PWM control signals to the two switching transistors in each loop through the first to sixth control signal terminals, and controls the conduction current of each loop through the duty cycle of the PWM control signals to adjust the rotation speed of the motor.

[0147] As an implementation manner, as Figure 19 shown, in this implementation manner, the two switching transistors of each bridge arm are integrated together. MOS transistors Q2 and Q7 are integrated into chip S1, MOS transistors Q4 and Q8 are integrated into chip S2, and MOS transistors Q6 and Q9 are integrated into chip S3. The integrated switching transistors can significantly reduce the occupied space on the circuit board, making the drive circuit more compact. Using the integrated switching transistor module simplifies the circuit design and layout and reduces the wiring complexity.

[0148] As an implementation manner, as Figure 20 shown, the input module includes a manual switch module 201, a touch module 111, a voice module 112, a networking module 106, and a wireless module 202 that are respectively connected to the control module 102. The portable fan further includes an atomization module 203, a refrigeration module 204, a heating module 205, a lighting module 206, and a shaking head module 207 that are respectively connected to the control module 102.

[0149] 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;

[0150] Among them, the button switch can achieve manual control of the fan, and the fan can be turned on, off, and speed-adjusted by pressing the button. The encoder is used to adjust the wind speed, and the fan rotation speed setting can be changed by rotating the encoder. The touch button controls the switch and wind speed adjustment of the fan through touch sensing. The sliding resistor can adjust the wind speed by sliding to adjust the resistance value, providing continuous wind speed adjustment. The touch sliding module adjusts the wind speed through a sliding gesture, and detects sliding parameters such as speed, direction, and position to control the wind speed. The touch screen module provides a graphical interface, and various functions such as switch, wind speed adjustment, and timing setting can be controlled by touching the screen. The voice control module can control the turning on, off, and wind speed adjustment of the fan through voice commands, enhancing the intelligent control experience. The networked voice control module can upload voice commands to the cloud server for processing through an Internet connection to achieve remote voice control. The networking module can achieve remote control functions through the Internet, and various functions of the fan can be remotely controlled by a mobile phone or other devices. The mobile control module can control various functions of the fan through a mobile device (such as a mobile phone or a tablet), including switch, wind speed adjustment, timing, etc. The Bluetooth control module can connect to a mobile device through Bluetooth to achieve short-range wireless control of the fan. The wireless control module can achieve remote control and management of the fan through a wireless signal (such as Wi-Fi). The atomization module 203 can provide a humidification function, making the wind blown by the fan cooler and more humid by atomizing water. The refrigeration module 204 can provide a refrigeration function, reducing the outlet air temperature through internal refrigeration components to enhance the cooling effect. The heating module 205 can provide a heating function, making the wind blown by the fan warm through internal heating components, which is suitable for cold seasons. The lighting module 206 can provide a lighting function, integrating an LED lamp or other light sources to provide night lighting or decorative lighting effects. The shaking head module 207 can provide an automatic shaking head function, enabling the fan to swing left and right, increasing the coverage of the wind, and improving comfort.

[0151] The technical effect of this embodiment is that the portable fan not only provides diversified control methods and intelligent functions, but also significantly improves the user's comfort experience and operation convenience, meeting various requirements in different usage scenarios.

[0152] It should be noted that all input, output, and control functions in the 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 occupancy, and may also reduce costs and power consumption.

[0153] A portable fan based on a high-speed three-phase motor provided in this embodiment includes at least a hand-held fan for hand-held use, a desktop fan for portability and desktop use, or a neck-mounted fan for neck use. The structure of the portable fan includes but is not limited to the following implementation manners:

[0154] As an implementation manner, this implementation manner provides a portable fan based on a high-speed three-phase motor, which can be used as a hand-held fan for hand-held use, such as Figure 21 shown, which is an exploded view of the portable fan. The portable fan includes:

[0155] Left handle shell 81, right handle shell 82, front air outlet shell 83, middle shell 84, air outlet 85, button 86, rocker switch button 87, hanging wire groove 88, shock-absorbing silica gel 89, shock-absorbing silica gel 90, air inlet net 91, light-shielding foam 92, battery foam 93, silica gel gasket 94, motor assembly 95, screw 96, screw 97, battery 98, and PCB 99.

[0156] As an implementation manner, this implementation manner provides a portable fan based on a high-speed three-phase motor, which can be used as another hand-held fan for hand-held use, such as Figure 22 shown, which is an exploded view of the portable fan. The portable fan includes:

[0157] 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 cap 413, screw 414, roller assembly 415, button decorative part 416, safety supervision office fixing bracket 417, roller switch small board 418, screw 419, rocker switch small board 420, main board fixing bracket 421, rocker switch 422, handle bracket 423, battery pack 424, handle 425, handle decoration 426, hanging rope bracket 427, screw 428, and snap ring 429.

[0158] As an implementation manner, this implementation manner provides a portable fan based on a high-speed three-phase motor, which can be used as a desktop fan for portability and desktop use, such as Figures 23 to 25 shown, which is an exploded view of the portable fan. The portable fan includes:

[0159] Screen housing 1, front screen housing 2, character light-transmitting patch 3, screen light-transmitting bracket 4, digital screen PCB 5, self-tapping screw 6, rear screen housing 7, screw 8, shock-absorbing silicone ring 9, shock-absorbing EVA 10, fan motor bracket 11, motor 12, snap ring 13, gasket 14, fan bearing 15, main board, digital screen PCB connecting wire 16, fan spring 17, magnetic ring assembly 18, fan blade 19, fan blade housing 20, light guide ring 21, light strip 22, fan head bracket 23, lower screw hole cover 24, upper screw hole cover 25, air duct part 26, housing 27, filter element two-end pressing foam 28, air filter element 29, filter element bracket 30, rear cover 31, copper nut 32, countersunk head machine screw 33, housing wire snap ring 34, wire pressing cover 35, base wire snap ring 36, rotating shaft 37, air duct wire passing cover 38, left rotating shaft plug 39, right rotating shaft plug 40, wire shielding cover 41, aluminum alloy bracket 42, machine screw 43, upper base housing 44, self-tapping screw 45, stepper motor 46, stepper motor bracket 47, steel ball 48, steel ball bracket 49, steel ball lower bracket 50, large gear 51, small gear 52, clutch gear 53, stepper motor bearing 54, battery EVA 55, spring 56, buckle 57, round button 58, round button silicone 59, light button silicone 60, light button 61, knob 62, button board 63, self-tapping screw 64, charging board 65, charging board bracket 66, lower base housing 67, battery pack 68, battery EVA 69, base bottom housing 70, label 71 and foot pad 72.

[0160] As an implementation manner, this implementation manner provides a portable fan based on a high-speed three-phase motor, which can be used as a neck-hanging fan. As Figure 26 shown, it is an exploded view of the portable fan. The portable fan includes:

[0161] Neck rest 501, air inlet 502, air outlet 503 and clamping arm 504.

[0162] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A portable fan based on a high-speed three-phase motor, characterized in that, Including: A control module, a drive module, and a high-speed three-phase motor, wherein the operating voltage of the high-speed three-phase motor is 2 to 18 volts, the operating current of the high-speed three-phase motor is 0.1 to 10 amperes, and / or the rated operating power of the high-speed three-phase motor is 0.5 to 100 watts; The control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power, so as to reduce the high-speed noise of the high-speed three-phase motor and control the wind speed within a preset wind speed range.

2. The portable fan according to claim 1, wherein, When the operating voltage of the high-speed three-phase motor is 6 to 8.4 volts, the operating current of the high-speed three-phase motor is 0.12 to 1 ampere, and / or the rated operating power of the high-speed three-phase motor is 0.8 to 9 watts, the control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power to be 6000 - 15000 RPM / MIN; Or, when the operating voltage of the high-speed three-phase motor is 5.9 to 8.4 volts, the operating current of the high-speed three-phase motor is 0.5 to 6 amperes, and / or the rated operating power of the high-speed three-phase motor is 5 to 50 watts, the control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power to be 20000 - 80000 RPM / MIN; Or, when the operating voltage of the high-speed three-phase motor is 2 to 5.8 volts, the operating current of the high-speed three-phase motor is 0.25 to 2 amperes, and / or the rated operating power of the high-speed three-phase motor is 1 to 8 watts, the control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power to be 15000 - 41000 RPM / MIN; Or, when the operating voltage of the high-speed three-phase motor is 8.5 to 12.6 volts, the operating current of the high-speed three-phase motor is 0.5 to 5 amperes, and / or the rated operating power of the high-speed three-phase motor is 6 to 60 watts, the control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power to be 25000 - 85000 RPM / MIN; Or, when the operating voltage of the high-speed three-phase motor is 12 to 18 volts, the operating current of the high-speed three-phase motor is 0.1 to 1 ampere, and / or the rated operating power of the high-speed three-phase motor is 2 to 16 watts, the control module controls the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, the operating current, and / or the rated operating power to be 2000 - 6000 RPM / MIN.

3. The portable fan according to claim 1, characterized in that, The portable fan further includes an input module, the input module is connected to the control module, the drive module includes a first arm, a second arm and a third arm, both sides of the midpoint of each arm include an upper-arm switch tube and a lower-arm switch tube, and the midpoint of each arm is connected to a phase coil of the motor; The input module outputs a wind speed adjustment control signal according to a user instruction, the control module generates a PWM control signal according to the wind speed adjustment control signal, and controls the switch tubes of each arm through the PWM control signal to adjust the rotation speed of the high-speed three-phase motor; And / or, the input module further outputs a switch signal according to a user instruction, the control module generates a switch control signal according to the switch signal, and controls the switch tubes of each arm through the switch control signal to drive the high-speed three-phase motor to start or stop running.

4. The portable fan according to claim 3, wherein, When the input module is a touch control module, the touch control module outputs a switch signal when detecting a touch action, and the control module generates a switch control signal according to the switch signal; The touch control module outputs a wind speed adjustment signal when detecting a sliding parameter, the control module calculates the duty ratio of the PWM signal according to the wind speed adjustment signal, and generates a PWM control signal according to the duty ratio of the PWM signal; Or, when the input module is a voice module, the voice module captures a user's voice signal and converts the voice signal into a switch signal and a wind speed adjustment control signal.

5. The portable fan according to claim 4, wherein, The touch control module is a touch sliding adjustment chip, the touch sliding adjustment chip includes a plurality of contacts, the touch sliding adjustment chip generates a switch signal when detecting a touch action through the plurality of contacts, and generates a corresponding wind speed adjustment control signal when detecting a sliding parameter through the plurality of contacts; Or, the touch control module is a touch screen chip, the touch screen chip includes a switch area and a sliding area, the touch screen chip generates a switch signal when detecting a touch action through the switch area, and generates a corresponding wind speed adjustment control signal when detecting a sliding parameter through the sliding area; Or, the touch control module includes a plurality of single-contact touch chips, the touch control module generates a switch signal when detecting a touch action through any one of the contacts, and generates a corresponding wind speed adjustment control signal when detecting a sliding parameter through the plurality of contacts; Or, the voice module includes a voice acquisition module, a voice recognition module and a voice output module, and the voice recognition module is respectively connected to the voice acquisition module, the voice output module and the control module; The voice module captures a user's voice signal, the voice recognition module converts the voice signal into a switch signal and a wind speed adjustment control signal and sends them to the control module, and the voice recognition module also controls the voice output module to output or not output an execution result according to the feedback result of the control module.

6. The portable fan according to claim 5, wherein, The portable fan further includes a networking module, and the networking module is respectively connected to the voice module and the control module; The voice module uploads the voice signal to the cloud server through the networking module. The cloud server converts the voice signal into a switch signal and a wind speed adjustment control signal and outputs them to the networking module. The networking module sends the switch signal and the wind speed adjustment control signal to the control module.

7. The portable fan according to any one of claims 1 to 6, characterized in that The portable fan at least includes a hand-held fan for hand-held use, a desktop fan for portability and desktop use, or a neck-mounted fan for neck use.

8. The portable fan according to any one of claims 4 to 6, characterized in that, When the control module detects a change in the working voltage, it maintains the working voltage within a constant voltage range by boosting or bucking. Alternatively, when the control module detects a change in the working current, it maintains the working current within a constant current range by adjusting the PWM control signal. Alternatively, when the control module detects a change in the working power, it maintains the working power stable by adjusting the working voltage or the working current. Alternatively, the portable fan further includes a rotation speed measurement module, which is respectively connected to the motor and the control module. The rotation speed measurement module is used to measure the actual rotation speed of the motor and send it to the control module. The control module obtains the rotation speed change amount based on the actual rotation speed and the target rotation speed, adjusts the duty cycle of the PWM signal according to the rotation speed change amount, and outputs the adjusted PWM control signal to the drive module.

9. The portable fan according to any one of claims 3 to 6, characterized in that, The input module and the control module are connected by wired or wireless means. The input module is provided on the housing of the portable fan or other electronic devices. Alternatively, the input module includes a manual switch module, a touch module, a voice module, a networking module, and a wireless module, which are respectively connected to the control module. The portable fan further includes an atomization module, a refrigeration module, a heating module, a lighting module, and a swing module, which are respectively connected to the control module.

10. The portable fan according to any one of claims 3 to 6, characterized in that The first bridge arm includes a first upper bridge arm switch tube and a second lower bridge arm switch tube. The second bridge arm includes a third upper bridge arm switch tube and a fourth lower bridge arm switch tube. The third bridge arm includes a fifth upper bridge arm switch tube and a sixth lower bridge arm switch tube. The midpoint of the first bridge arm is connected to the first coil. The midpoint of the second bridge arm is connected to the second coil. The midpoint of the third bridge arm is connected to the third coil. The first upper bridge arm switch tube, the first coil, the second coil, and the fourth lower bridge arm switch tube form a first loop; the first upper bridge arm switch tube, the first coil, the third coil, and the sixth lower bridge arm switch tube form a second loop; the third upper bridge arm switch tube, the second coil, the third coil, and the sixth lower bridge arm switch tube form a third loop; the third upper bridge arm switch tube, the second coil, the first coil, and the second lower bridge arm switch tube form a fourth loop; the fifth upper bridge arm switch tube, the third coil, the first coil, and the second lower bridge arm switch tube form a fifth loop; the fifth upper bridge arm switch tube, the third coil, the second coil, and the fourth lower bridge arm switch tube form a sixth loop. The control module controls each loop to conduct one by one in a preset order through the switch control signal to drive the motor to start running, and the control module also controls the conduction time of the switching tubes in each loop through the PWM control signal to adjust the rotation speed of the motor.

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