Portable fan

Abstract

Disclosed in the present application is a portable fan, comprising a fan assembly, the fan assembly comprising a fan motor and a fan blade; the fan motor is arranged in a fan housing, and the fan blade is arranged in the fan housing, at least one connecting position being configured between the fan blade and the fan motor; and / or, the fan housing is made of plastic, and the fan blade is made of plastic; and / or, the fan motor is a three-phase motor, the rated power of the fan motor being less than or equal to 15 W, and the rated working voltage of the fan motor being 3.7-8.4 V; and / or, the fan motor further comprises an input module and a control module, the control module generating a PWM control signal according to a wind speed regulation control signal and controling the rotating speed of the fan motor by means of the PWM control signal; and / or, the fan blade comprises a hub and moving blades arranged on the hub, the hub having a top surface and a bottom surface.

Description

portable fan

[0001] This application claims priority to Chinese patent applications filed with the China Patent Office on December 8, 2023, with application numbers 202323366356.0, 202323366977.9, 202323366172.4, 202323364527.6, 202323366722.2, 2024201786608, and 202411002327.2, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of fans, and in particular to a portable fan. Background Art

[0003] In the hot summer, fans have become a must-have item for people to eliminate the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0004] Portable fans are popular among people because of their small size and easy portability.

[0005] Application Contents

[0006] The purpose of the present application is to provide a portable fan that is more firmly and stably connected by arranging a buckle inside a shell.

[0007] An embodiment of the present application provides a portable fan, comprising:

[0008] fan housing;

[0009] A fan assembly, the fan assembly comprising: a fan motor and fan blades, the fan motor being disposed in the fan housing, the fan blades being disposed in the fan housing, and at least one connection position being provided between the fan blades and the fan motor; and / or;

[0010] The fan housing is made of plastic, and the fan blades are made of plastic; and / or;

[0011] The fan motor is a three-phase motor, the rated power of the fan motor is less than or equal to 15W, and the rated operating voltage of the fan motor is 3.7-8.4V; and / or,

[0012] The fan motor further includes an input module and a control module, wherein the control module generates a PWM control signal according to the wind speed adjustment control signal and controls the rotation speed of the fan motor through the PWM control signal; and / or,

[0013] The fan blades include: a hub and moving blades arranged on the hub, the hub includes a top surface and a bottom surface, the top surface is a plane or an arc surface, and the ratio of the diameter of the top surface to the diameter of the bottom surface is 1:5-4:5. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0015] FIG1 is a schematic diagram of the overall structure of a fan module according to a specific embodiment 1 of the present application;

[0016] FIG2 is a schematic diagram of the exploded structure of a fan module according to a specific embodiment 1 of the present application;

[0017] FIG3 is a cross-sectional view of a fan module according to a specific embodiment 1 of the present application;

[0018] FIG4 is a schematic structural diagram of a housing from a first viewing angle according to a specific embodiment 1 of the present application;

[0019] FIG5 is a schematic structural diagram of a housing from a second viewing angle according to a specific embodiment 1 of the present application;

[0020] FIG6 is a schematic structural diagram of a motor housing according to a specific embodiment 1 of the present application;

[0021] FIG7 is a schematic structural diagram of a fan blade according to a specific embodiment 1 of the present application from a first perspective;

[0022] FIG8 is a schematic structural diagram of a fan blade according to a specific embodiment 1 of the present application from a second viewing angle;

[0023] FIG9 is a schematic structural diagram of an assembly base from a first perspective according to a specific embodiment 1 of the present application;

[0024] FIG10 is a schematic structural diagram of an assembly base according to a specific embodiment 1 of the present application from a second viewing angle;

[0025] FIG11 is a schematic structural diagram of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0026] FIG12 is another structural schematic diagram of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0027] FIG13 is another structural diagram of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0028] FIG14 is a circuit diagram of a touch-slide adjustment chip in a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0029] FIG15 is a circuit diagram of a touch screen connector in a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0030] FIG16 is a schematic diagram of a display interface of a control device in a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0031] FIG17 is a circuit diagram of a single-touch touch screen chip in a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0032] FIG18 is another schematic structural diagram of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0033] FIG19 is a schematic structural diagram of a voice module in a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0034] FIG20 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 in Example 2 of the present application;

[0035] FIG21 is a circuit diagram of a voice recognition module in a voice module of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0036] FIG22 is a schematic structural diagram of a voice output module in a voice module of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0037] FIG23 is a circuit diagram of a voice output module in a voice module of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0038] FIG24 is another schematic structural diagram of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0039] FIG25 is another schematic structural diagram of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0040] FIG26 is a schematic structural diagram of a driving module in a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0041] FIG27 is a schematic structural diagram of a motor in a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0042] FIG28 is a circuit diagram of a driving module in a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0043] FIG29 is another circuit diagram of a driving module in a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0044] FIG30 is another structural diagram of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0045] FIG31 is an exploded view of the structure of an embodiment of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0046] FIG32 is an exploded view of another embodiment of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0047] FIG33 is an exploded view of the first part of another embodiment of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0048] FIG34 is an exploded view of the second part of the structure of another embodiment of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0049] FIG35 is an exploded view of the third portion of another embodiment of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0050] FIG36 is a schematic structural diagram of another embodiment of a portable fan based on a high-speed three-phase motor provided in Example 2 of the present application;

[0051] FIG37 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 3 of the present application;

[0052] FIG38 is a schematic diagram of the exploded structure of a portable fan according to a specific embodiment 3 of the present application;

[0053] FIG39 is a schematic structural diagram of a fan housing according to a specific embodiment 3 of the present application from a first perspective;

[0054] FIG40 is a schematic structural diagram of a fan housing according to a third specific embodiment of the present application from a second perspective;

[0055] FIG41 is a schematic structural diagram of a fan blade according to a specific embodiment 3 of the present application from a first perspective;

[0056] FIG42 is a schematic structural diagram of a fan blade according to a third specific embodiment of the present application from a second viewing angle;

[0057] FIG43 is a schematic diagram of the overall structure of a fan module according to a specific embodiment 4 of the present application;

[0058] FIG44 is a schematic diagram of the exploded structure of a fan module according to a fourth specific embodiment of the present application;

[0059] FIG45 is a schematic structural diagram of a housing in a top view according to a fourth specific embodiment of the present application;

[0060] FIG46 is a schematic diagram of the three-dimensional structure of a housing of a specific embodiment 4 of the present application when viewed from a bottom perspective;

[0061] FIG47 is a cross-sectional view of a fan module according to a fourth embodiment of the present application;

[0062] FIG48 is a schematic diagram of the overall structure of a fan module according to a specific embodiment 5 of the present application;

[0063] FIG49 is a schematic diagram of the exploded structure of a fan module according to a fifth specific embodiment of the present application;

[0064] FIG50 is a schematic diagram of the overall structure of a housing according to a specific embodiment 5 of the present application;

[0065] FIG51 is a schematic structural diagram of a fan blade according to a fifth embodiment of the present application from a first perspective;

[0066] FIG52 is a schematic structural diagram of a fan blade according to a specific embodiment 5 of the present application from a second perspective;

[0067] FIG53 is a schematic structural diagram of a fan blade according to a fifth embodiment of the present application from a third perspective;

[0068] FIG54 is a schematic diagram of the overall structure of a fan module according to a specific embodiment 6 of the present application;

[0069] FIG55 is a schematic diagram of the exploded structure of a fan module according to a sixth specific embodiment of the present application;

[0070] FIG56 is a cross-sectional schematic diagram of a fan module according to a specific embodiment 6 of the present application;

[0071] FIG57 is a schematic diagram of the three-dimensional structure of a housing according to a specific embodiment 6 of the present application;

[0072] FIG58 is a schematic structural diagram of the connection between the housing and the rotating shaft according to a specific embodiment 6 of the present application;

[0073] Figure 59 is a schematic diagram of the connection structure between the shell and the PCB circuit board of a specific embodiment 6 of the present application.

[0074] FIG60 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 7 of the present application;

[0075] FIG61 is a schematic diagram of the position structure of the grip portion and the fan assembly according to a specific embodiment 7 of the present application;

[0076] FIG62 is an exploded schematic diagram of a fan assembly according to a seventh specific embodiment of the present application;

[0077] FIG63 is an exploded schematic diagram of the overall structure of a portable fan according to a seventh specific embodiment of the present application;

[0078] FIG64 is an exploded schematic diagram of an assembly tube and a fan assembly according to a seventh specific embodiment of the present application;

[0079] FIG65 is a schematic structural diagram of an assembly cylinder according to a specific embodiment 7 of the present application;

[0080] FIG66 is a schematic structural diagram of a connecting tube according to a seventh specific embodiment of the present application;

[0081] Figure 67 is a schematic structural diagram of the air inlet ring of a specific embodiment 7 of the present application. DETAILED DESCRIPTION

[0082] Example 1

[0083] Please refer to FIG1 , which is a schematic diagram of the overall structure of the fan module of this embodiment.

[0084] As shown in Figure 1, a portable fan includes: a fan housing 1; a fan assembly 4, wherein the fan assembly 4 includes: a fan motor 41 and fan blades 42, the fan motor 41 is disposed within the fan housing 1, and the fan blades 42 are disposed within the fan housing 1, and at least one connection point is provided between the fan blades 42 and the fan motor 41. The fan blades 42 and the motor are connected by a rotating shaft. In some embodiments, after the fan blades 42 are connected to the rotating shaft, they are also sleeved on the magnetic ring of the fan motor 41.

[0085] In this embodiment, the fan housing 1 is made of plastic, and the fan blades 42 are also made of plastic. Plastic is lightweight, which can reduce the overall mass of the fan motor 41, making the fan motor 41 even lighter. In some embodiments, the fan motor 41 weighs 10-50 grams. In some preferred embodiments, the fan motor 41 weighs 14-30 grams.

[0086] The plastic materials in this embodiment include (but are not limited to): polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polycarbonate (PC), polyethylene terephthalate (PET), polyoxymethylene (POM), polyimide (PI), polytetrafluoroethylene (PTFE), ABS plastic, etc.

[0087] The fan housing 1 is made of plastic, and the fan blades 42 are made of plastic, which makes the fan assembly 4 lighter and reduces the preparation cost of the fan assembly 4, giving the fan assembly 4 a better market competitive advantage.

[0088] In some embodiments, the fan motor 41 is a three-phase motor with a rated power of 15W or less and a rated operating voltage of 3.7-8.4V. The low power and rated operating voltage allow the fan motor 41 to be battery-powered, making the portable fan more portable. In some preferred embodiments, the rated power of the fan motor 41 is 0.6-15W.

[0089] The low-power three-phase motor, due to its unique three-phase drive mode, can generate a high rotational speed of the fan motor 41 at low voltage. In this embodiment, the fan motor 41 rotates at a speed of 14,000-48,000 rpm. The high-speed rotation of the fan motor 41 increases the air output and blowing speed of the portable fan, thereby improving the blowing effect.

[0090] The airflow speed at the outlet of the fan motor 41 is between 4m / s and 25m / s. Within this speed range, the portable fan provides the best cooling and wind sensation. When the airflow speed is less than 4m / s, the portable fan's cooling effect is poor, and there is no noticeable wind sensation when the airflow blows across the user's body. When the airflow speed is greater than 25m / s, the airflow intensity at the outlet of the portable fan is high, and the recoil force generated when the user holds the portable fan in use makes it difficult for the user to hold it properly. When the portable fan is used on a desktop, the strong recoil force makes it difficult to place the portable fan stably, and it is easy to tip over.

[0091] In this embodiment, the wind noise level of the fan motor 41 is 10-89 dB. Within this wind noise range, the wind speed of the portable fan and its corresponding wind noise are optimized. Even at the maximum wind speed, it will not damage human hearing.

[0092] In some embodiments, the fan motor 41 further includes an input module and a control module. The control module generates a PWM control signal according to the wind speed adjustment control signal, and controls the rotation speed of the fan motor 41 through the PWM control signal.

[0093] As an embodiment, 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 amp, 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 6000-15000 RPM / MIN through the drive module 103 according to the operating voltage, operating current and / or rated operating power.

[0094] Among them, the high-speed three-phase motor 104 is driven by a voltage range of 6-8.4V, suitable for power supply by two batteries in series, with an operating current range of 0.12-1A, ensuring stable operation at different speeds, and a power range of 0.8W-9W, meeting the power requirements of a 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 with an adjustment range of 6000-15000RPM. The drive module 103 converts the 6-8.4V DC power into three-phase AC power 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 fan has 4 pole pairs, 12 slots, 5 blades, and 6 guide vanes / impellers.

[0095] As an embodiment, 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 amps, and / or the rated operating power of the high-speed three-phase motor 104 is 5 to 50 watts, the control module 102 controls the rated operating speed of the high-speed three-phase motor 104 to 20,000-48,000 RPM / MIN through the drive module 103 according to the operating voltage, operating current and / or rated operating power.

[0096] 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 powering two batteries in series.

[0097] As an embodiment, the operating voltage of the high-speed three-phase motor 104 is 2 to 5.8 volts, the operating current of the high-speed three-phase motor 104 is 0.25 to 2 amps, and / or the rated operating power of the high-speed three-phase motor 104 is 1 to 8 watt-hours. The control module 102 controls the rated operating speed of the high-speed three-phase motor 104 to 14000-41000 RPM / MIN through the drive module 103 according to the operating voltage, operating current and / or rated operating power.

[0098] 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, 3.7V, ..., 4.3V, or 5.8V. It is suitable for powering two batteries connected in series. The operating current range is 0.25-1.8A, ensuring stable operation at various speeds. The power range is 1W-8W, meeting the power requirements of a portable fan. The control module 102 monitors the motor's operating voltage, current, and power in real time and adjusts accordingly. The control module 102 can precisely control the motor's speed within a range of 15,000-41,000 RPM. The drive module 103 converts the 2-5.8V DC power into three-phase AC power, driving the high-speed three-phase motor 104 using inverter technology. Two batteries are connected in series to provide a stable voltage. The fan has four pole pairs, nine slots, nine blades, and seven guide vanes / impellers.

[0099] In some embodiments, the fan blades 42 include: a hub and moving blades arranged on the hub, the hub includes a top surface and a bottom surface, the top surface is a plane or an arc surface, and the ratio of the diameter of the top surface to the diameter of the bottom surface is 1:5-4:5.

[0100] When the ratio of the top diameter to the bottom diameter is within the vertical range of 1:5-4:5, the fan blades 42 are driven by the fan motor 41 to rotate, ensuring that a high wind pressure is maintained within the fan housing 1, thereby achieving the high airflow rate required for the portable fan. When the ratio of the top diameter to the bottom diameter is less than 1:5, the top surface is too sharp, and vortices are easily formed on the outside of the top surface during high-speed rotation. When the ratio of the top diameter to the bottom diameter is greater than 4:5, the fan blades 42 significantly obstruct the incoming airflow, affecting the air intake of the fan assembly 4.

[0101] In some embodiments, the ratio of the inner diameter of the fan housing 1 to the length of the fan housing 1 is 1:3-3:2. When the fan assembly 4 is in operation, the inner diameter of the fan housing 1 determines the area of ​​the air intake of the fan assembly 4, and correspondingly determines the air intake and air output of the fan assembly 4. The length of the fan housing 1 determines the residence time of the airflow flowing into the fan assembly 4 in the fan housing 1, and the acceleration time under the high pressure state in the fan housing 1. When the ratio of the inner diameter of the fan housing 1 to the length of the fan housing 1 is 1:3-3:2, the air intake and the acceleration time of the airflow in the fan assembly 4 reach the optimal state. When the ratio of the inner diameter of the fan housing 1 to the length of the fan housing 1 is less than 1:3, the acceleration efficiency of the fan assembly 4 on the airflow gradually decreases, and the excessively long fan housing 1 channel will also accelerate the friction of the airflow and reduce the airflow speed. When the ratio of the inner diameter of the fan housing 1 to the length of the fan housing 1 is greater than 3:2, the diameter of the fan housing 1 is too large, the pressure relief effect is obvious, the air pressure value inside the fan housing 1 is reduced, and the effect on the acceleration of the airflow is reduced.

[0102] Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a schematic diagram of the overall structure of the fan module of this embodiment; FIG. 2 is a schematic diagram of the exploded structure of the fan module of this embodiment.

[0103] As shown in Figures 1 and 2, a fan module includes a housing 1, a connector 2, an assembly base 3, and a fan assembly 4. The connector 2 is disposed within the housing 1 and defines an air duct. The assembly base 3 is connected to the connector 2. The fan assembly 4 is sleeved and connected to the assembly base 3 and is connected to the assembly base 3 via a rotating shaft 414.

[0104] In the above embodiment, the connector 2 is disposed within the housing 1, the assembly base 3 is connected to the connector 2, and the fan assembly 4 is connected to the assembly base 3. The assembly base 3 and the fan assembly 4 are connected in two ways. First, a portion of the structure of the fan assembly 4 is sleeved and mounted on the assembly base 3; second, a portion of the structure of the fan assembly 4 is also connected to the assembly base 3 via a rotating shaft 414. The reusable connection between the fan assembly 4 and the assembly base 3 not only increases the stability of the connection between the fan assembly 4 and the assembly base 3, but also significantly reduces the space occupied by the fan assembly 4 within the housing 1, further reducing the volume of the fan module.

[0105] In this embodiment, the housing 1 is cylindrical, and a cylindrical air cavity 11 is defined within the cylinder. However, the shape of the housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes.

[0106] Please refer to FIG3 , which is a cross-sectional view of the fan module according to this embodiment.

[0107] As shown in Figure 3, in this embodiment, the housing 1 is provided with an air cavity 11 extending through its upper and lower surfaces. The air cavity 11 is cylindrical. However, the shape of the air cavity 11 is not limited thereto. Depending on the specific application scenario, in some embodiments, the air cavity 11 can be shaped like a star, a heart, a racetrack, or a polygon.

[0108] Please refer to FIG. 4 and FIG. 5 . FIG. 4 is a schematic structural diagram of the shell of this embodiment from a first viewing angle; FIG. 5 is a schematic structural diagram of the shell of this embodiment from a second viewing angle.

[0109] As shown in Figures 4 and 5, the connecting member 2 includes: a connecting ring 21 and a plurality of connecting plates 22. The plurality of connecting plates 22 are arranged around the connecting ring 21. One end of each of the plurality of connecting plates 22 is connected to the inner surface of the shell 1, and the other end of each connecting plate 22 is connected to the connecting ring 21. Two adjacent connecting plates 22 among the plurality of connecting plates 22 are enclosed to form an air duct.

[0110] The arrangement of the plurality of connecting plates 22 enables the connecting ring 21 to be suspended in the housing 1 . Every two connecting plates 22 among the plurality of connecting plates 22 enclose an air duct, enabling the airflow pushed by the fan assembly 4 to flow through the air duct.

[0111] In this embodiment, the number of connecting plates 22 is 7. However, the number of connecting plates 22 is not limited thereto, and in some embodiments, the number of connecting plates 22 can be 2, 3, 4, 5, 6, 8, or more, depending on the specific application scenario.

[0112] In some embodiments, the connecting member 2 is a plate disposed inside the housing 1 . The shape of the plate is the same as the shape of the internal cavity of the housing 1 , and a plurality of holes for airflow are opened on the plate.

[0113] The connector 2 and the housing 1 are manufactured by an integral molding process. However, the manufacturing process of the connector 2 and the housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connector 2 and the housing 1 can be separately machined and molded, and then assembled and connected by gluing, snapping, riveting, or screwing.

[0114] In some embodiments, the connecting ring 21 includes an outer connecting ring 211 and an inner connecting ring 212. The inner connecting ring 212 is disposed within the outer connecting ring 211. The outer connecting ring 211 is connected to a plurality of connecting plates 22. The assembly base 3 is connected to the inner connecting ring 212. The thickness of the outer connecting ring 211 is greater than the thickness of the inner connecting ring 212. It should be noted that the thickness in this embodiment refers to the height in the vertical direction perpendicular to the horizontal direction.

[0115] The thickness of the connecting outer ring 211 is greater than the thickness of the connecting inner ring 212, so that when the connecting inner ring 212 is set in the connecting outer ring 211, there is still empty space in the connecting outer ring 211. The empty space can be used to set the assembly base 3, thereby improving the space utilization of the fan module.

[0116] The end of each of the multiple connecting plates 22 facing the fan assembly 4 is bent and extended toward the fan assembly 4 to form an air guide plate 23 . The bending direction of the air guide plate 23 is opposite to the rotation direction of the fan assembly 4 .

[0117] Specifically, each of the plurality of connecting plates 22 is formed with an air guide plate 23 at the end facing the fan blades 42 in the fan assembly 4. The curvature of the air guide plate 23 is opposite to the rotational direction of the fan blades 42. In this embodiment, the curvature of the air guide plate 23 is opposite to the rotational direction of the fan blades 42, meaning that the curvature of the air guide plate 23 is opposite to the rotational direction of the fan blades 42. This is not limited to the specific embodiment in which the curvature of the air guide plate 23 is 180° to the rotational direction of the fan blades 42. In some embodiments, the curvature of the air guide plate 23 at an obtuse angle to the rotational direction of the fan blades 42 is also within the scope of the definition of "opposite" in this embodiment.

[0118] The bending direction of the air guide plate 23 is opposite to the rotation direction of the fan blades 42. When the fan blades 42 rotate, the airflow will be driven to rotate in the same direction. At this time, the bending direction of the air guide plate 23 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the curved part of the air guide plate 23. Due to the opposite directions, the angle between the airflow and the curved part of the air guide plate 23 is greater than 90 degrees. The airflow contacts the air guide plate 23 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the air guide plate 23. During the contact process at a larger angle, the air guide plate 23 has an obvious guiding effect on the airflow, with little energy loss, which greatly improves the air outlet efficiency.

[0119] In some embodiments, the air guide plate 23 is disposed between the fan assembly 4 and the housing 1 , and the air guide plate 23 is connected to the inner surface of the housing 1 , with a gap between the air guide plate 23 and the fan assembly 4 .

[0120] Specifically, the air guide plate 23 is disposed between the fan motor 41 and the housing 1 , and a gap is provided between the air guide plate 23 and the fan motor 41 .

[0121] In some embodiments, the air guide plate 23 is disposed between the hub 421 of the fan blade 42 and the housing 1 , and a gap is provided between the air guide plate 23 and the hub 421 .

[0122] The air guide plate 23 is disposed between the fan blades 42 and the housing 1, with a gap between the air guide plate 23 and the fan blades 42. Due to the gap between the air guide plate 23 and the fan blades 42, after the airflow contacts the air guide plate 23, part of the airflow flows along the guide of the air guide plate 23 toward the air outlet, while the remaining part of the airflow flows through the gap between the air guide plate 23 and the fan blades 42 to the next air guide plate 23. The gap between the air guide plate 23 and the fan blades 42 provides a channel for air pressure balance between the air guide plates 23, avoiding the problem of inconsistent air pressure on both sides of the air guide plate 23 due to the complete closure of the air guide plate 23, which in turn affects the air output efficiency of the fan module.

[0123] The assembly base 3 is detachably connected to the connector 2 , and the assembly base 3 is made of metal.

[0124] The connector 2 is provided with a plurality of first fixing holes 215, and the assembly base 3 is provided with a plurality of corresponding second fixing holes 311. The plurality of first fixing holes 215 and the plurality of second fixing holes 311 are connected by screws. The screw connection allows the assembly base 3 to be disassembled, making it easy to replace and repair the assembly base 3.

[0125] However, the detachable connection between the connector 2 and the assembly base 3 is not limited to screw connection. Depending on the specific application scenario, in some embodiments, the connector 2 and the assembly base 3 can also be connected by a snap or lock connection.

[0126] A positioning groove 214 is formed on the connecting member 2 , and one end of the assembly base 3 connected to the connecting member 2 is disposed in the positioning groove 214 .

[0127] The positioning groove 214 is provided on the connecting inner ring 212 of the connector 2. The setting of the positioning groove 214 enables the base 31 in the assembly base 3 to be embedded in the positioning groove 214. This method facilitates the positioning and alignment of the first fixing hole 215 and the second fixing hole 311, thereby optimizing the assembly process. At the same time, since the assembly base 3 needs to withstand the torque generated by the fan assembly 4 when the fan assembly 4 rotates, and the magnitude of the torque is proportional to the rotation speed of the fan assembly 4. Therefore, when the generated torque is borne by the screw, the strength requirements of the screw are relatively high, and at the same time, the service life of the screw will be affected. The setting of the positioning groove 214 can deflect and stop the assembly base 3 through the positioning groove 214, which is equivalent to sharing a part of the torque by the positioning groove 214, greatly reducing the loss of the screw and extending the service life of the fan module.

[0128] Specifically, the positioning groove 214 is configured as a rounded triangle, and the corresponding base 31 of the assembly base 3 is also configured as a rounded triangle that matches the positioning groove 214. The edges of the two adjacent rounded corners of the positioning groove 214 are inwardly curved, and the corresponding edges of the two adjacent rounded corners of the assembly base 3 are also inwardly curved. The inwardly curved structure makes the edge of the positioning groove 214 that contacts the assembly base 3 in an arc shape. When the fan assembly 4 rotates, the force applied by the assembly base 3 on the positioning groove 214 is decomposed in different directions along the arc edge, rather than being concentrated in the same direction. This further reduces the force strength at the edge of the positioning groove 214 and improves the service life of the fan assembly 4.

[0129] In some embodiments, the shape of the positioning groove 214 and the corresponding shape of the assembly base 3 are not limited thereto. Depending on the specific application scenario, the shape of the positioning groove 214 can be (but not limited to) a running field shape, a polygon, an ellipse, or other shapes that can have a limiting effect on the embedded objects of the same shape. Similarly, the shape of the base 31 of the assembly base 3 can also be changed accordingly based on the shape of the positioning groove 214.

[0130] In this embodiment, the number of first fixing holes 215 is three, and the corresponding number of second fixing holes 311 can also be three. The first fixing holes 215 are respectively arranged at the rounded corners of the rounded triangle, and the second fixing holes 311 are respectively arranged at the rounded corners of the rounded triangle of the base 31. However, the number of first fixing holes 215 and the number of second fixing holes 311 are not limited to this. Depending on the specific application scenario, in some embodiments, the number of first fixing holes 215 and the number of second fixing holes 311 are (but not limited to) 2, 4, 5, or more.

[0131] In this embodiment, the assembly base 3 is made of metal, and the shell 1 and the connector 2 are made of plastic. The use of metal can make the assembly base 3 more physically strong and suitable for the high-speed rotation of the fan assembly 4.

[0132] Specifically, the assembly base 3 is made of aluminum alloy. However, the material of the assembly base 3 is not limited thereto. Depending on the specific application scenario, in some embodiments, the assembly base 3 can be made of (but not limited to) conventional metals such as iron, aluminum, and copper, or can be made of an alloy of iron or copper.

[0133] In some embodiments, the assembly base 3 and the housing 1 can be made of the same plastic material.

[0134] The fan assembly 4 includes a fan motor 41 and fan blades 42 . The fan motor 41 is sleeved and connected to the assembly base 3 . The fan motor 41 is connected to the assembly base 3 via a rotating shaft 414 . The fan blades 42 are connected to the assembly base 3 via a rotating shaft 414 .

[0135] In the fan assembly 4, the fan motor 41 is connected to the assembly base 3 and the rotating shaft 414 respectively. The two connection methods can make the fan motor 41 suspended in the shell 1. At the same time, the sleeve installation can make the space occupied by the fan motor 41 and the assembly base 3 smaller.

[0136] The fan motor 41 includes: a coil 411, a magnetic ring 412 and a motor housing 413. The coil 411 is sleeved on the assembly base 3, the magnetic ring 412 is sleeved on the coil 411, and the motor housing 413 is sleeved on the magnetic ring 412. The motor housing 413 is fixedly connected to the rotating shaft 414 so that the motor housing 413 drives the rotating shaft 414 to rotate.

[0137] In this embodiment, when coil 411 is energized, it drives magnetic ring 412 to rotate, which in turn drives motor housing 413 to rotate, and finally, motor housing 413 drives shaft 414 to rotate. This motor drive method enables fan motor 41 to be mounted on assembly base 3. Furthermore, because magnetic ring 412 has a larger force-bearing area than the driven motor, fan motor 41 can rotate faster.

[0138] Coil 411 is interference-fitted with assembly base 3, magnetic ring 412 is magnetically coupled to coil 411, and motor housing 413 is interference-fitted with shaft 414. During rotation, magnetic ring 412 and coil 411 rotate while suspended in mid-air, resulting in less physical friction than conventional motors. This further increases the speed of fan motor 41.

[0139] In some embodiments, the connection method between the coil 411 and the assembly base 3 is not limited to interference fit. Depending on the specific application scenario, the connection method between the coil 411 and the assembly base 3 can also be (but not limited to): gluing, welding, riveting, screw connection and other fixing methods.

[0140] In some embodiments, the connection between the motor housing 413 and the rotating shaft 414 is not limited to interference fit. Depending on the specific application scenario, the connection between the motor housing 413 and the rotating shaft 414 can also be (but not limited to): gluing, welding, riveting, screw connection, etc.

[0141] Please refer to FIG6 , which is a schematic structural diagram of the motor housing of this embodiment.

[0142] As shown in FIG6 , in some embodiments, a limit stop 417 is provided on the interior of the motor housing 413, and the limit stop 417 abuts against one end of the magnetic ring 412. The provision of the limit stop 417 inside the motor housing 413 allows for quick assembly and positioning of the magnetic ring 412, thereby preventing the position of the motor housing 413 within the housing 1 from changing due to inconsistent assembly of the magnetic ring 412, which could lead to poor rotational stability of the fan module and susceptibility to friction damage.

[0143] The stop edge 417 on the motor housing 413 is formed by the varying thickness of the sidewalls of the motor housing 413. The sidewall thickness of the motor housing 413 is greater at the end adjacent to the fan blades 42, while the sidewall thickness of the motor housing 413 at the end adjacent to the connector 2 is less. This varying thickness of the sidewalls of the motor housing 413 creates the stop edge 417 within the motor housing 413.

[0144] In some embodiments, the limiting edge 417 inside the motor housing 413 can be a limiting edge 417 formed by a protrusion on the inner surface of the motor housing 413 .

[0145] The fan blades 42 include a hub 421 and a plurality of blades 422 . The plurality of blades 422 are arranged around the hub 421 , and the hub 421 is connected to the rotating shaft 414 .

[0146] Please refer to Figures 7 and 8. Figure 7 is a structural schematic diagram of the fan blades of this embodiment from a first perspective; Figure 8 is a structural schematic diagram of the fan blades of this embodiment from a second perspective.

[0147] As shown in Figures 7 and 8, in this embodiment, the number of blades 422 is 9. However, the number of blades 422 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of blades 422 can be (but not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11, or more.

[0148] The hub 421 includes a top surface 421a, a bottom surface 421c, and side edges 421b. The cross-sectional area of ​​the bottom surface 421c is larger than that of the top surface 421a, and there is a smooth transition between the top surface 421a and the side edges 421b. That is, in this embodiment, the hub 421 is configured in the shape of a bullet with a flat head. This shape of the hub 421 allows the airflow passing through the blades 422 to flow along the curved surface formed by the smooth transition between the top surface 421a and the side edges 421b, effectively guiding the airflow and forming a wall effect, thereby improving the efficiency of the airflow flowing through the fan blades 42 and thereby improving the air output efficiency of the fan module.

[0149] However, the shape of the hub 421 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the hub 421 can be (but not limited to): hemispherical, conical, truncated cone, cylindrical, etc.

[0150] The top surface 421a of the hub 421 is a circular surface. However, the shape of the top surface 421a is not limited thereto. Depending on the specific application scenario, in some embodiments, the top surface 421a of the hub 421 can also be conical, polygonal, elliptical, or other shapes.

[0151] Each of the multiple blades 422 includes a first end 422a and a second end 422b opposite to the first end 422a. The length of the first end 422a is greater than the length of the second end 422b. The first end 422a is located adjacent to the top surface 421a of the hub 421, and the second end 422b is located adjacent to the bottom surface 421c of the hub 421. In each blade 422, the first end 422a is used to push the airflow into the fan blade 42 when the fan blade 42 rotates. The longer length of the first end 422a is conducive to pushing the airflow. The second end 422b is located at the end of the airflow direction. The reduction in the length of the second end 422b is conducive to reducing the size of the space for airflow flow, compressing the airflow, increasing the initial kinetic energy of the airflow, and thereby improving the air outlet efficiency of the fan module.

[0152] Each blade 422 has a blade edge 422c. The thickness of each blade 422 gradually increases from the first end 422a to the blade edge 422c, and gradually decreases from the blade edge 422c to the second end 422b. The varying thicknesses of the blades 422 at different locations result in each blade 422 being thinner at both ends and thicker in the middle. This structure enhances the airflow-cutting capabilities of the blades 422 at both ends and reduces air resistance at both ends. The increased thickness in the middle enhances the physical strength of the blades 422. Furthermore, the increased thickness of the blades 422 reduces the space between adjacent blades 422, thereby boosting the pressure of the airflow.

[0153] Please refer to Figures 9 and 10. Figure 9 is a structural diagram of the assembly base of this embodiment from a first perspective; Figure 10 is a structural diagram of the assembly base of this embodiment from a second perspective.

[0154] As shown in FIG9 and FIG10 , the assembly base 3 includes: a base 31 and a connecting column 32 . The base 31 is connected to the connecting member 2 , the connecting column 32 is connected to the base 31 , and the fan assembly 4 is sleeved and connected to the connecting column 32 .

[0155] The base 31 is shaped like a rounded triangle, and the edges of the two adjacent rounded corners of the base 31 are also configured as inner arcs. This inner arc structure allows the force applied by the base 31 to the positioning groove 214 to be distributed in different directions along the arc edge when the fan assembly 4 rotates, rather than being concentrated in the same direction. This further reduces the force applied to the edge of the positioning groove 214 and increases the service life of the fan assembly 4.

[0156] In some embodiments, the shape of the base 31 is not limited thereto. Depending on the specific application scenario, the shape of the base 31 can be (but not limited to): a running field shape, a polygonal shape, an elliptical shape, etc.

[0157] The connecting column 32 includes: a first column 321 and a second column 322. The diameter of the first column 321 is larger than the diameter of the second column 322. The first column 321 is connected to the base 31, and the second column 322 is connected to the first column 321. The fan assembly 4 is sleeved and connected to the second column 322.

[0158] The diameter of the first column 321 is larger than that of the second body, so that the first column 321 and the second column 322 form a stepped structure. The first column 321 can serve as a stopper for the fan motor 41 or the PCB circuit board, facilitating the assembly of the fan motor 41 or the PCB circuit board.

[0159] In some embodiments, the shape of the connecting column 32 is not limited thereto. Depending on the specific application scenario, the connecting column 32 can be (but not limited to): a straight column, a prismatic column, or a composite structure consisting of a frustum and a straight column.

[0160] A connecting hole 33 is provided on the connecting column 32, and a first bearing 34 and a second bearing 35 are respectively provided at both ends of the connecting hole 33. The rotating shaft is inserted into and passes through the first bearing 34 and the second bearing 35. A groove 414a is provided on the end of the rotating shaft 414 passing through the second bearing 35, and a retaining spring 415 is connected to the groove 414a.

[0161] The arrangement of the first bearing 34 and the second bearing 35 allows for smoother rotation of the rotating shaft 414. Furthermore, the arrangement of the two rotating shafts 414 stabilizes the linear rotation of the rotating shaft 414, thereby increasing the rotation speed of the fan motor 41. The arrangement of the retaining groove 414a and the retaining spring 415 prevents the rotating shaft 414 from falling off the first bearing 34 and the second bearing 35, thereby enhancing the stability and reliability of the connection of the rotating shaft 414.

[0162] The base 31 includes: a first protrusion 312, a second protrusion 313 and a third protrusion 314, wherein an inner arc notch 315 is formed between the first protrusion 312, the second protrusion 313 and the third protrusion 314, and an outer arc piece 316 is provided between the second protrusion 313 and the third protrusion 314.

[0163] The second fixing holes 311 are respectively provided on the first protrusion 312, the second protrusion 313, and the third protrusion 314. The thickness of the outer arc piece 316 is less than the thickness of the main body of the base 31, and the second wiring hole 317 is provided on the outer arc piece 316. The structure of the inner arc notch 315 makes the edge where the positioning groove 214 contacts the base 31 arc-shaped. When the fan assembly 4 rotates, the force applied by the base 31 on the positioning groove 214 is decomposed in different directions along the arc edge, rather than being concentrated in the same direction. This further reduces the force strength at the edge of the positioning groove 214 and improves the service life of the fan assembly 4.

[0164] In some embodiments, a connecting platform 416 is provided at the position where the fan assembly 4 is connected to the rotating shaft 414. The rotating shaft 414 passes through the connecting platform 416 and is interference fit with the connecting platform 416. The end of the connecting platform 416 facing the first bearing 34 abuts against the first inner ring 341 of the first bearing 34.

[0165] Specifically, at the location where the motor housing 413 of the fan assembly 4 connects to the rotating shaft 414, a protrusion extends in the direction of the connecting column 32 to form a connecting platform 416. The provision of the connecting platform 416 can increase the contact area between the motor housing 413 and the rotating shaft 414, thereby enhancing the connection strength between the motor housing 413 and the rotating shaft 414. This can effectively prevent the problem of excessive local force caused by the small contact area between the motor housing 413 and the rotating shaft 414, resulting in unstable connection and shortened service life.

[0166] In some embodiments, the connection between the connecting platform 416 and the rotating shaft 414 is not limited to interference fit. Depending on the specific application scenario, the connection between the connecting platform 416 and the rotating shaft 414 can also be (but not limited to): gluing, welding, riveting, screw connection, etc.

[0167] The connecting platform 416 abuts the first inner ring 341 of the first bearing 34. When the motor housing 413 drives the rotating shaft 414 to rotate, in addition to the rotating shaft 414 driving the first inner ring 341, the connecting platform 416 also provides driving force for the first inner ring 341. This effectively prevents the rotating shaft 414 and the first inner ring 341 from rotating relative to each other or slipping over time, which can lead to asynchronous rotation of the first inner ring 341 and the rotating shaft 414, reducing the rotation efficiency of the rotating shaft 414. Furthermore, when the motor housing 413 rotates, it drives the first inner ring 341 of the first bearing 34 to rotate, which in turn drives the rotating shaft 414 to rotate synchronously. This rational design effectively extends the load-bearing length of the rotating shaft 414, shortens the rotating torque of the rotating shaft 414, reduces the force intensity per unit area of ​​the rotating shaft 414, and prolongs its service life. Furthermore, it ensures more stable rotation of the rotating shaft 414, reducing vibration and noise in the fan module.

[0168] In some embodiments, a sleeve 36 is provided between the second bearing 35 and the retaining spring 415 . The sleeve 36 is sleeved on the rotating shaft 414 , and one end of the sleeve 36 facing the second bearing 414 abuts against the second inner ring 351 of the second bearing 35 .

[0169] The provision of the sleeve 36 prevents frictional damage to the retaining ring 415 and the second bearing 35, which could occur if the rotating shaft 414 slips between the first bearing 34 and the second bearing 35. The end of the sleeve 36 facing the second bearing 35 abuts the second inner ring 351, allowing the sleeve 36 to rotate synchronously with the rotating shaft 414 and the second inner ring 351. This prevents friction and collision damage to the rotating shaft 414 and the second bearing 35, which could occur due to a lack of driving force.

[0170] In some embodiments, one end of the sleeve 36 abuts against the retaining spring 415 , and the other end abuts against the second inner ring 351 of the second bearing 35 .

[0171] The shaft sleeve 36 is made of alloy material or metal material. However, the material of the shaft sleeve 36 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shaft sleeve 36 can be made of plastic or rubber material.

[0172] In some embodiments, one end of the rotating shaft 414 connected to the retaining spring 415 is located inside the connecting inner ring 212 to prevent the protruding end of the rotating shaft 414 from causing friction damage with other components.

[0173] In some embodiments, a PCB is disposed between the base 31 and the fan assembly 4 and is mounted on the connecting post 32. The PCB is used to control functions such as starting, stopping, and speed change of the fan motor 41. The PCB is disposed between the base 31 and the fan assembly 4 and mounted on the connecting post 32. This saves space within the fan module and improves space utilization within the fan module. Furthermore, the distance between the PCB and the fan motor 41 is shortened, reducing the length of the wire connecting the two and consumables.

[0174] The PCB circuit board is configured as a ring as a whole. However, the shape of the PCB circuit board is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the PCB circuit board can be (but not limited to): polygonal, elliptical, or racetrack-shaped.

[0175] The PCB is connected to the connecting column 32 by means of interference fit. However, the fixing method of the PCB is not limited thereto. Depending on the specific application scenario, in some embodiments, the PCB is also fixed to the coil 411 by screws.

[0176] In some embodiments, a first wiring hole 213 is provided on the connector 2, and a second wiring hole 317 is provided on the base 31 corresponding to the first wiring hole 213, and the thickness of the base 31 at the position where the second wiring hole 317 is provided is smaller than the thickness at other positions of the base 31.

[0177] To facilitate wiring and prevent the wires connected to the PCB from leaking, a first wiring hole 213 is provided on the connector 2, and a second wiring hole 317 is provided on the base 31. The provision of the first wiring hole 213 and the second wiring hole 317 allows the wires to be routed in a manner that prevents leakage, thereby improving the smoothness of the airflow within the fan module. At the same time, the thickness of the base 31 at the location where the second wiring hole 317 is provided is thinner than the thickness at other locations on the base 31, which can reduce the overall weight of the base 31 and make the fan module more lightweight. The design of the thickness variation cooperates with the design of the positioning groove 214 to make the side of the base 31 facing the fan motor 41 more flat and neat.

[0178] In some embodiments, a flexible sleeve 5 is provided over the housing 1, with annular protrusions 51 and dot-shaped protrusions 52 alternatingly arranged on its exterior. The provision of the flexible sleeve 5 can increase the friction between the fan module and external objects or other mating structures, thereby enhancing the connection stability of the fan module. Furthermore, the provision of the flexible sleeve 5 can effectively buffer the physical vibrations generated by the fan module during operation, making the fan module's rotation more stable and generating less noise.

[0179] The flexible sleeve 5 is provided with alternating annular protrusions 51 and dot-shaped protrusions 52 on its exterior. Specifically, in some embodiments, the annular protrusions 51 are provided at both ends of the flexible sleeve 5, while the dot-shaped protrusions 52 are provided between the two annular protrusions 51. Alternatively, the annular protrusions 51 are provided at both ends and in the middle of the flexible sleeve 5, while the dot-shaped protrusions 52 are provided between two adjacent annular protrusions 51. However, the alternating arrangement of the annular protrusions 51 and dot-shaped protrusions 52 is not limited to this. The number of annular protrusions 51 can be 4, 5, 6, or more. The dot-shaped protrusions 52 can also be provided at one or both ends of the flexible sleeve 5.

[0180] The alternating arrangement of the annular protrusions 51 and the dot-shaped protrusions 52 provides the annular protrusions 51 and the dot-shaped protrusions 52 with a larger deformation space, facilitating the assembly of the fan module. At the same time, the larger deformation space can improve the buffering performance of the flexible sleeve 5.

[0181] The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 42 is 1.01-1.15. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 42 defines the gap between the housing 1 and the maximum diameter of the fan blades 42. When the fan blades 42 rotate, they generate centrifugal force on the airflow flowing through the fan blades 42. Under the action of the centrifugal force, the airflow moves laterally and collides with the inner wall of the housing 1, generating turbulence, thereby affecting the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. Limiting the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 42 to between 1.01-1.15 reduces the gap between the fan blades 42 and the housing 1, reduces the stroke of the lateral airflow under the action of centrifugal force, and limits the speed of the airflow when it contacts the inner edge of the housing 1 to a smaller preferred range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the shell 1 to the maximum diameter of the fan blades 42 is limited to between 1.01-1.15, within this ratio range, the distance between the fan blades 42 and the shell 1 is small, which can have an excellent interception effect on the return airflow in the fan blades 42, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blades 42, thereby improving the air intake efficiency of the fan module. The improvement of the air intake efficiency improves the overall air outlet efficiency of the fan module.

[0182] In some embodiments, the length ratio of the first end 422a and the second end 422b is in the range of 1.4-1.9. The airflow flowing through the fan flows from the first end 422a to the second end 422b, and the direction of the first end 422a facing the second end 422b gradually decreases. This reduction process cooperates with the size change of the hub 421 to gradually reduce the space for the airflow to flow, gradually pressurize the convection, and increase the initial velocity of the airflow. However, since there is a gap between the fan blades 42 and the housing 1, when the pressure of the airflow entering the first end 422a and flowing out of the second end 422b is obviously too large, since it is not a completely enclosed space, the airflow will have a backflow phenomenon due to excessive pressure. The backflow airflow will impact the intake airflow of the fan module to form a cyclone, reducing the air intake efficiency of the fan module. The length ratio range of the first end 422a and the second end 422b is limited to 1.4-1.9. Within this ratio range, the pressure of the airflow flowing through the fan blade 42 is adjusted within the optimal range, minimizing the backflow problem caused by excessive pressure. At the same time, within the range of this ratio, the first end 422a can most effectively intercept and utilize the return airflow that gradually overflows from the edge of the blade 422, minimizing the probability of the return airflow flowing out of the housing 1. The combination of the two effects can make the airflow entering the first end 422a and the airflow outflowing from the end of the airflow approach the optimal value of 1:1. This greatly improves the air outlet efficiency of the fan blade 42.

[0183] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination should not be limited to the combination listed in this embodiment.

[0184] Example 2

[0185] This embodiment provides a portable fan, as shown in Figures 11 and 22, 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, and each bridge arm includes an upper bridge arm switch tube and a lower bridge arm switch tube on both sides of the midpoint, and the midpoint of each bridge arm is connected to a phase coil of the high-speed three-phase motor 104; the input module 101 outputs a wind speed adjustment control signal according to user instructions, and the control module 102 generates a PWM control signal according to the wind speed adjustment control signal, and controls the switch tube of each bridge arm through the PWM control signal to adjust the speed of the high-speed three-phase motor 104.

[0186] Among them, the input module 101 also outputs a switch signal according to the user instruction, the control module 102 generates a switch control signal according to the switch signal, and controls the switch tube of each bridge arm through the switch control signal to drive the high-speed three-phase motor 104 to start or stop running.

[0187] When the user's instruction is to turn on the fan, the input module 101 outputs a switch signal based on 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 based on the user's instruction. The user can input control instructions in various ways depending on the type of input module 101. For example, the input module 101 can input instructions through touch, voice, or other input methods. If the input module 101 is a touch module 111, the input module 101 generates a switch signal when it detects a touch action. If the input module 101 detects a sliding action, it generates a wind speed adjustment signal. If 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. If the input module 101 is a networking module 106, it receives remote control signals or wind speed adjustment parameters set by the user. The input module 101 can also be a multi-functional input module, enabling various functions such as timing control, lighting control, head movement control, spray control, and cooling control. The timing function refers to the user setting the timing switch time through the touch module 111, or remotely setting the timing function through the voice module 112 and the networking module 106. Lighting control refers to the user adjusting the light switch status, brightness and color through the touch module 111, or remotely controlling the light through the voice module 112 and the networking module 106. The shaking head function refers to the user setting the shaking head angle and speed of the fan through the touch module 111, or remotely controlling the shaking head function through the voice module 112 and the networking module 106. The spray function refers to the user turning on or adjusting the spray volume through the touch module 111, or remotely controlling the spray function through the voice module 112 and the networking module 106. The cooling function refers to the user adjusting the cooling intensity of the fan through the touch module 111, or remotely controlling the cooling function through the voice module 112 and the networking module 106. Multiple function controls are achieved through the input module, allowing users to use and adjust the fan more flexibly to meet the needs of different usage scenarios.

[0188] The input module 101 and the control module 102 are connected via a wired or wireless manner, and the input module is disposed on a housing of a portable fan or other electronic device.

[0189] Among them, the input module 101 and the control module 102 are connected in a wired manner, for example, through an I2C cable, an SPI cable, a UART cable, a GPIO interface, a USB interface, a CAN bus, an I2S interface, and an ADC interface. The I2C cable (Inter-Integrated Circuit) is a serial communication protocol that is commonly used to connect low-speed peripheral devices (such as touch modules) to the mainboard, using two wires (SDA and SCL) for data transmission and clock synchronization. The SPI cable (Serial Peripheral Interface) is a high-speed synchronous serial communication protocol that uses four wires (MISO, MOSI, SCK, and SS) for data transmission. The UART cable (Universal Asynchronous Receiver-Transmitter) is an asynchronous serial communication protocol that uses two wires (Tx and Rx) for data transmission. The GPIO interface (General-Purpose Input / Output) is a universal digital signal input / output interface that can be configured as input or output mode. The USB interface (Universal Serial Bus) is a universal high-speed serial communication interface that supports plug-and-play and hot-swap. 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. Signal transmission between the input module 101 and the control module 102 is achieved through wireless communication technologies such as Wi-Fi, Bluetooth, Zigbee, etc. The input module 101 is directly integrated into the casing of the portable fan and is suitable for occasions where the user wants to operate the fan directly, such as adjusting the wind speed through a touch screen or turning the fan on and off with a button. The input module 101 can also be separated from the portable fan and installed on other electronic devices (such as smart phones, tablets, smart watches, etc.), and connected to the fan's control module wirelessly, making the control of the portable fan more flexible and convenient, and the user can remotely control it 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 signals from the input module 101 and processes them. Based on the switching signals, it generates a switch control signal for controlling the start and stop of the high-speed three-phase motor 104. It also calculates and adjusts the control signal for the portable fan based on the wind speed adjustment signal. This control signal includes, but is not limited to, PWM (pulse width modulation), PPM (pulse position modulation), a data protocol, or other custom protocols. PWM signals are a commonly used control method that adjusts the motor speed by changing the signal's duty cycle (i.e., the ratio of the high-level time to the period). PPM signals transmit information by changing the position of the pulse within a period. The data protocol can be a standard communication protocol (such as I2C, SPI, or UART) or a custom communication protocol for transmitting more complex control instructions. Custom protocols are designed to specify the control signal format and transmission method based on specific application requirements. If the input module 101 is the voice module 112, the control module 102 generates the switch control signal and the PWM control signal based on the switching signal and the wind speed adjustment control signal. If the input module 101 is the networking module 106, the control module 102 generates the corresponding control signal based on the remote control signal. The drive module 103 consists of three bridge arms, each of which includes an upper bridge arm switching tube and a lower bridge arm switching tube, connected to the phase coils of the high-speed three-phase motor 104. The control module 102 controls the switching tube of each bridge arm through a switch control signal to start or stop the high-speed three-phase motor 104. The switching tube of each bridge arm is controlled by a PWM control signal to adjust the speed of the high-speed three-phase motor 104. The six-step commutation method can be used to control the start, stop, and speed of the motor. At each moment, only two MOS tubes are turned on, 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 conductive MOS tubes, and the remaining MOS tubes remain off. The high-speed three-phase motor 104 receives the signal from the drive module 103, starts to operate, and provides the corresponding wind speed.

[0190] The technical effect of the first embodiment of the present invention is that: through the switch signal and wind speed adjustment control signal output by the input module, the control module can generate a switch control signal and a PWM control signal, and the user can adjust the operating status and wind speed of the fan as needed to achieve flexible wind speed adjustment; compared with the traditional mechanical switch method, this technical solution allows the user to select the appropriate wind speed according to specific needs, enhances the convenience and comfort of use, and improves the user experience.

[0191] As an embodiment, as shown in Figure 13, when the input module 101 is a touch module 111, the touch module 111 outputs a switch signal when detecting a touch action, and the control module 102 generates a switch control signal based on the switch signal; when the touch module 111 detects a sliding action, it outputs a wind speed adjustment signal, and the control module 102 calculates the PWM signal duty cycle based on the wind speed adjustment signal, and generates a PWM control signal based on the PWM signal duty cycle.

[0192] The touch module 111 detects user touch and sliding motions. When a user touches the touch module 111, the touch module 111 detects the touch motion and generates a switch signal. When the user slides on the touch module 111, the touch module 111 detects the sliding parameter and generates a wind speed adjustment signal. The control module 102 receives and processes the switch signal, generating 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 PWM signal duty cycle based on the wind speed adjustment signal.

[0193] Among them, the control module 102 calculates the PWM signal duty cycle using different calculation methods according to different sliding parameters, and the sliding parameters may include the following: sliding distance: the distance the user slides the finger on the touch area; sliding speed: the speed at which the user slides the finger; sliding direction: the direction in which the user slides the 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.

[0194] The specific steps for calculating the duty cycle, taking the sliding distance as the main parameter, are as follows:

[0195] When the user starts sliding on the touch area, the starting position is recorded. When the user finishes sliding on the touch area, the ending position is recorded. The distance between the starting position and the ending position is used 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 distance Dmax that the user may slide on the touch area. Compare the actual sliding distance D with the maximum sliding distance Dmax, calculate the sliding distance ratio R, and 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, the corresponding PWM signal duty cycle is calculated according to the corresponding relationship, and the PWM control signal is output according to the PWM signal duty cycle. The generated PWM control signal is sent to the drive module 103 to adjust the speed of the high-speed three-phase motor 104 to achieve a change in wind speed.

[0196] Among them, taking the sliding time as the main parameter, the specific steps for calculating the duty cycle are as follows:

[0197] When a user swipes on the touch panel, the touch module 111 detects the swipe and records the start and end times of the swipe. The touch module 111 transmits the swipe time to the control module 102, which calculates the normalized swipe time and generates the corresponding PWM duty cycle. The control module 102 sends the PWM signal to the driver module 103, which controls the speed of the high-speed three-phase motor 104 by adjusting the switching frequency and duty cycle of the switch.

[0198] The specific steps for calculating the duty cycle, taking the click position as the main parameter, are as follows:

[0199] When a user clicks a location on the touch module 111, the touch module 111 detects the coordinates of the clicked location (e.g., X and Y coordinates). The touch module 111 uses the clicked location coordinates as click parameters to generate a wind speed adjustment signal. Based on the clicked location, the control module 102 calculates the required PWM signal duty cycle. For example, the touch area is divided into multiple zones, each corresponding to a different wind speed level. Assume that the touch area of ​​the touch module 111 is divided into five equal zones, and clicking each zone corresponds to a wind speed level: Zone 1 (leftmost) is for low wind speed, Zone 2 (middle) is for medium wind speed, and Zone 5 (rightmost) is for high wind speed. When the user clicks the rightmost side of the touch area (Zone 5), the touch module 111 detects the clicked location coordinates and generates a corresponding wind speed adjustment signal. The control module 102 receives the wind speed adjustment signal and, based on the clicked location (Zone 5), calculates the PWM signal duty cycle required for the high wind speed level. The control module 102 generates a PWM control signal and sends it to the driver module 103. The driving module 103 adjusts the rotation speed of the high-speed three-phase motor 104 to a high wind speed gear by controlling the conduction time of the upper bridge arm switch tube and the lower bridge arm switch tube.

[0200] As an embodiment, the touch 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 detects the touch action through these contacts. If the pressure caused by the touch action is detected, the touch 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 switch tube in the drive module 103, thereby realizing the start or stop of the high-speed three-phase motor 104, that is, turning the fan on or off. In addition to detecting touch actions, the touch sliding adjustment chip can also detect the user's sliding parameters on the touch screen, including sliding gestures, sliding distance, sliding speed, number of slides and sliding time. These parameters are transmitted to the control module 102 through the touch module 111. The control module 102 generates a corresponding PWM control signal according to the preset logic 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 switch tube in the driving module 103 to adjust the speed of the high-speed three-phase motor 104, thereby achieving wind speed regulation.

[0201] Among them, there are multiple contact points on the touch sliding adjustment chip. When the user performs a touch sliding operation on the contact points, 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. These parameters reflect the degree to which the user wants to adjust the wind speed. Based on 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 corresponding PWM signal duty cycle based on the signal size. 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 motor speed. By adjusting the duty cycle of the PWM signal, precise control of the motor speed is achieved, thereby adjusting the fan's wind speed.

[0202] As an example, as shown in Figure 14, U5 is a touch chip. Pins PA0 to PA4 of the touch chip U5 can be connected to the control module 102 through the above-mentioned connection method. The touch chip U5 includes at least contacts K2, K3, K4, K5, K6 and K7. Each contact can detect touch actions. Different contacts can be used to detect sliding parameters such as sliding gestures, sliding distance, sliding speed, number of sliding times and sliding time.

[0203] The technical benefit of this embodiment is that, compared to traditional portable fans, which rely solely on a mechanical switch to control the fan's gear position, the touch module enables more diverse control methods. Users can not only turn the fan on and off with a simple touch, but also flexibly adjust the wind speed by sliding. The use of a touch-slide adjustment chip makes fan operation more convenient and intuitive. Instead of repeatedly pressing a mechanical switch, users can easily control the fan's on / off and wind speed simply by touching and sliding, improving operational efficiency and user experience. The control module generates precise PWM control signals based on the detected sliding parameters, enabling precise control of the fan's wind speed. Users can flexibly adjust the wind speed as needed, resulting in a more comfortable user experience.

[0204] As a second embodiment of the touch module 111, the touch module 111 can be a touch screen chip, including single-way touch, multi-way touch, touch screen, etc. The touch sliding screen chip includes a switch area and a sliding area. The touch sliding screen chip generates a switch touch signal through the switch area, and generates a corresponding wind speed adjustment control signal when a sliding parameter is detected through the sliding area.

[0205] Among them, the touch module 111 of the portable fan uses a touch screen chip, which includes a switch area and a sliding 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 slides in the sliding area, the touch screen chip will detect the sliding 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, which controls the switch tube of each bridge 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, which controls at least one switch tube of each bridge arm through this signal to adjust the speed of the high-speed three-phase motor 104 to achieve wind speed regulation.

[0206] As an example, as shown in FIG15 , 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 using the above connection method. As shown in FIG16 , a control interface is displayed on the mobile terminal screen. The control interface includes a power button, a speed adjustment button, a timer off button, an air purification button, an ambient light button, and a fan abnormality reminder. Different functions are achieved by clicking the buttons. This is only an example and does not limit the present application.

[0207] The technical effect of this embodiment is that through the touch screen chip, the user can easily realize the switch control and wind speed adjustment of the fan. The operation is simple and intuitive, meeting the user's various needs. The touch screen chip can realize flexible switching and wind speed adjustment through the detection of the switch area and the sliding area. The user can accurately control the wind speed of the fan according to needs, providing a more comfortable use experience. The use of the touch screen enhances the technological and modern sense of the portable fan, improves the user experience, and makes the product more competitive in the market.

[0208] As a third embodiment of the touch module 111, the touch module 111 includes multiple single-contact touch chips connected in parallel. The touch module 111 generates a switch touch signal when it detects a touch action through any one contact, and generates a corresponding wind speed adjustment control signal when it detects sliding parameters through multiple contacts.

[0209] The touch control module 111 of the portable fan includes multiple single-touch touch chips or a multi-touch integrated chip. When a user touches any single-touch touch chip, the chip generates a switch signal. When a user slides on the touch screen, the multiple single-touch touch chips 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, which controls the switch tube of each bridge arm to start or stop the motor. After receiving the wind speed adjustment control signal, the control module 102 generates a PWM control signal, which controls at least one switch tube of each bridge arm to adjust the speed of the high-speed three-phase motor 104 and achieve wind speed regulation.

[0210] As an example, as shown in Figure 17, 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 through resistor R11. The above function can be achieved by connecting multiple single-contact touch chips in parallel.

[0211] The technical benefit of this embodiment is that, through multiple parallel single-touch touch chips, users can easily control the fan's on / off function and adjust its wind speed. This simple and intuitive operation meets multiple user needs. The touch-slide adjustment chip, through detection of multiple single contacts, enables flexible wind speed adjustment, allowing users to precisely control the fan's wind speed as needed, providing a more comfortable user experience. The use of a touch screen enhances the portable fan's technological and modern feel, improving the user experience and making the product more competitive in the market.

[0212] As an embodiment, as shown in Figure 18, when the input module 101 is a 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, and 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.

[0213] The user issues a voice command through voice module 112, such as "turn on the fan," "turn off the fan," or "increase the fan speed." The microphone in voice module 112 captures the user's voice signal. Voice module 112 transmits the captured voice signal to the voice recognition unit, which converts the voice signal into a corresponding switch signal and wind speed adjustment control signal. Voice module 112 then sends the switch signal and wind speed adjustment control signal to control module 102. Control module 102 generates corresponding control signals based on the switch signal and 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 control module 102 generates the switch control signal. If the command involves wind speed adjustment ("increase the fan speed"), the command corresponds to the wind speed adjustment control signal, and control module 102 generates a PWM control signal. Control module 102 uses the switch control signal to control the switch in driver module 103, driving the high-speed three-phase motor 104 to start or stop. Control module 102 adjusts the duty cycle of the PWM signal based on the wind speed adjustment control signal to generate the corresponding PWM control signal. The control module 102 sends a PWM control signal to the driving module 103 , and controls the 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.

[0214] The technical effect of this embodiment is that the user does not need to manually operate the mechanical switch or touch panel, and can conveniently control the portable fan through voice commands, which is more convenient to operate. The motor speed is controlled by PWM signal, ensuring the smoothness and accuracy of wind speed adjustment, so that users can get a better user experience.

[0215] As for the voice module 112, as an implementation mode, as shown in FIG19 , the voice module 112 includes a voice acquisition module 121, a voice recognition module 122 and a voice output module 123. The voice recognition module 122 is respectively connected to the voice acquisition module 121, the voice output module 123 and the control module 102. The voice acquisition module 121 captures the user's voice signal, the voice recognition module 122 converts the voice signal into a switch signal and a wind speed adjustment control signal and sends it to the control module 102. The voice recognition module 122 also controls the voice output module 123 to output or not output the execution result according to the feedback result of the control module 102.

[0216] Among them, the voice acquisition module 121 is responsible for capturing the user's voice signal and is usually composed of a microphone, which 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 techniques, the voice signal is processed into recognizable signal instructions. These instructions 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 denoising, 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 features from the voice signal. Based on a large amount of labeled voice data, the voice recognition model is trained. Commonly used technologies include hidden Markov models (HMMs), deep learning models (such as recurrent neural networks (RNNs) and long short-term memory networks (LSTMs), etc. The feature vectors are input into the voice recognition model for recognition and decoding. The model maps the feature vector sequence into an instruction sequence. The decoded instructions are output. The voice type can be to indicate whether the fan is turned on or off, 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 reducing 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 text can be used to replace the above-mentioned turning on the fan, turning off the fan, increasing the wind speed, and reducing the wind speed. The signal output by the voice module 112 can be a single-byte or multi-byte data packet, depending on the complexity of the instruction and the design of the system. For example: a single-byte signal can be 0x01 (indicating turning on the fan), and a multi-byte signal can be 0x01 0x02 (indicating turning on the fan and setting it to the second level wind speed).

[0217] For example, if a user says "turn on the fan," the voice module 112 recognizes the command and generates a signal 0x01, which is then sent to the control module 102. If a user says "increase the fan speed," the voice module 112 recognizes the command and generates a signal 0x03, which is then sent to the control module 102. If a user says "adjust the fan speed to medium," the voice module 112 recognizes the command and generates a signal 0x11, which is then sent to the control module 102.

[0218] As an example, as shown in Figures 20 and 21, the voice collection 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, and 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, pin 1 of the voice recognition chip U1 is connected to one end of the capacitor C21, 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 regulator D1 are connected to the ground, the other end of the resistor R20 and the cathode of the voltage regulator D1 are connected to a high level, pin 3 of the voice recognition chip U1 is connected to one end of the capacitor C24, and pin 4 of the voice recognition chip U1 is connected to one end of the capacitor C25. Pin 5 of the voice recognition chip U1 and the other end of capacitor C24 and the other end of capacitor C25 are connected to the ground. Pin 24 of the voice recognition chip U1 and one end of capacitor C22, one end of capacitor C23, and the other end of capacitor C21 are connected to the same potential. Pin 23 of the voice recognition chip U1 is connected to the other end of capacitor C22. Pin 22 of the voice recognition chip U1 is connected to the other end of capacitor C23. Pins 22, 21, and 20 of the voice recognition chip U1 are connected to A1, A2, and A3 of the voice acquisition module 121, respectively.

[0219] The working process of this circuit is as follows: microphone MIC collects the user's voice input, capacitors C27 and C28 convert the user's voice input into an electrical signal and output it to the voice recognition chip U1, and the voice recognition chip U1 converts the captured voice signal into a switch signal and a wind speed adjustment control signal.

[0220] The technical effect of this embodiment is that through voice input and output, the user interactivity and friendliness of the device are improved, allowing users to easily control the start and stop and speed adjustment of the fan through voice commands without directly contacting the device. Voice control enables the fan to have more functions, such as intelligent operation and customized voice settings according to user voice commands, enhancing the intelligence of the device and user experience.

[0221] As for the voice output module 123 , as an implementation, as shown in FIG22 , the voice output module 123 includes a power amplifier module 1131 and a speaker 1132 , and the power amplifier module 1131 is connected to the voice recognition module 122 and the speaker 1132 , respectively.

[0222] Among them, the power amplifier module 1131 is mainly responsible for amplifying the voice signal, and amplifies 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 voice signal amplified by the power amplifier module 1131 and converts it into sound output.

[0223] As an example, as shown in Figure 23, the voice output module 123 includes an amplifier chip U2 and a speaker S1. The B1 and B2 ends of the amplifier chip U2 are respectively connected to pins 16 and 17 of the voice recognition chip U1. The amplifier chip U2 is responsible for amplifying the voice signal and outputting the voice from the speaker S1.

[0224] 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 deformed during the transmission process, and the speaker can be driven with sufficient volume so that the user can clearly hear the voice output result.

[0225] As an embodiment, as shown in Figure 24, the portable fan also includes a networking module 106, which 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, and the cloud server 107 converts the voice signal into a switch signal and a wind speed adjustment control signal and outputs it to the networking module 106, and the networking module 106 sends the switch signal and the wind speed adjustment control signal to the control module 102.

[0226] The system's recognition accuracy and flexibility can be further enhanced by utilizing the voice recognition service and remote control capabilities of the cloud server 107 through networking. The specific steps are as follows: a microphone is used to capture the user's voice signal, which is then transmitted to the networking module 106 through analog-to-digital conversion. The networking module 106 then uploads the captured voice signal to the cloud server 107 for voice recognition. The cloud server 107 converts the voice signal into a switch signal and a wind speed adjustment control signal, which are then returned to the networking module 106. The networking module 106 transmits the switch signal and wind speed adjustment control signal returned from the cloud to the control module 102, which generates the corresponding control signal. The control module 102 responds to voice commands, such as "turn on the fan" or "turn off the fan," or can customize other switch commands to increase user convenience and enjoyment. For example, possible customized switch commands include "turn on the fan," "turn off the fan," "start blowing," "I'm hot, turn on the fan," and so on. These commands can be further expanded based on user habits and preferences to enhance the interactive experience. The control module 102 generates a switch control signal based on the voice command, such as "increase fan speed" or "decrease fan speed," and calculates the corresponding PWM signal duty cycle based on the voice command, and generates a PWM control signal. The driver module 103 drives the motor based on the received switch control signal and PWM control signal, controlling the fan's on / off and fan speed.

[0227] The technical effects of this embodiment are: since voice recognition is performed on the cloud server, the cloud server has stronger computing power and more efficient voice recognition algorithm, which can more accurately recognize the user's voice commands and improve the recognition accuracy; the voice recognition task is completed in the cloud, which reduces the computing burden of the portable fan device, allowing the device to adopt a lower-cost hardware configuration while extending 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 improving the user experience and the intelligence of the device.

[0228] As an embodiment, as shown in Figure 25, the portable fan also includes a speed measurement module 105, which is respectively connected to the high-speed three-phase motor 104 and the control module 102; the speed measurement module 105 is used to measure the actual speed of the high-speed three-phase motor 104 and send it to the control module 102, the control module 102 obtains the speed change according to the actual speed and the target speed, and adjusts the PWM signal duty cycle according to the speed change, and outputs the adjusted PWM control signal to the drive module 103.

[0229] In this embodiment, an incremental PID control algorithm is specifically used to generate a PWM signal to improve the smoothness of the PWM signal and the accuracy of motor speed regulation. This can be achieved through the following steps: The incremental PID control algorithm calculates the current and previous errors and adjusts the control variable to achieve precise control of the system. It includes three parts: proportional (P), integral (I), and differential (D): proportional control (P): proportional adjustment of the current error; integral control (I): cumulative adjustment of past errors; and differential control (D): rate of change adjustment of the current error. The PWM module and timer are initialized, and the parameters required by the PID control algorithm (proportional coefficient Kp, integral coefficient Ki, differential coefficient Kd) are set. Sensor data is acquired. The speed measurement module 105, which can be a magnetic encoder or Hall sensor, measures the motor speed in real time and feeds it back to the control module 102. The control module 102 calculates the current error based on the set target speed and the actual measured speed, calculates the incremental control variable based on the current error, adjusts the PWM duty cycle, and outputs a PWM signal to control the speed of the high-speed three-phase motor 104.

[0230] The technical effect of this embodiment is that the PID control algorithm adjusts the control quantity according to the error, can accurately track the set value, and quickly stabilize the motor speed near the target value. The PID control algorithm responds quickly to error changes and can adjust the PWM signal in time when the load changes, ensuring the flexibility and accuracy of wind speed regulation. The PID control algorithm can also accurately adjust the PWM control signal to ensure a smooth transition of the wind speed.

[0231] As an implementation manner, when the control module 102 detects a change in the operating voltage, it keeps the operating voltage within a constant voltage range by boosting or reducing the voltage.

[0232] When the control module 102 detects that the operating voltage has changed, in order 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, and 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 increase 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 degree of boost or buck in real time to ensure that the output voltage is constant within the preset range.

[0233] As an implementation manner, when the control module 102 detects a change in the operating current, it adjusts the PWM control signal to keep the operating current within a constant current range.

[0234] When the control module 102 detects a change in the operating current, it adjusts the PWM (pulse width modulation) control signal to keep the current within a constant range. The control module 102 continuously monitors the operating current of the motor. When it is detected that the current deviates from the preset range (such as 0.12-1A), the current regulation mechanism is triggered. The control module 102 changes the input power of the motor by adjusting the duty cycle of the PWM signal. For example, when it is detected that the current is lower than the preset range, the PWM duty cycle is increased, the input power is increased, and the current is increased. Conversely, when the current is higher than the preset range, the PWM duty cycle is reduced, the input power is reduced, and the current is reduced. Through feedback from 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.

[0235] As an implementation manner, when the control module 102 detects that the operating power has changed, it keeps the operating power stable by adjusting the operating voltage or the operating current.

[0236] The control module 102 continuously monitors the operating power of the motor (P=V×I) and triggers the power regulation mechanism when it detects that the power deviates from the set value. By controlling the step-up or step-down 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 reduced 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 increase the power; when the power is higher than the set value, the PWM duty cycle is reduced to reduce the current and reduce the power. Through control signal feedback, the control module 102 adjusts the voltage or current in real time to ensure that the operating power remains within a constant range.

[0237] In the above embodiment, the control module monitors the operating voltage, current and power of the motor in real time, and through the corresponding adjustment mechanism, ensures that the motor can operate stably under various working conditions, thereby improving the efficiency and performance of the motor and ensuring the reliability and stability of the portable fan in different environments.

[0238] For the driving module 103, as an embodiment, as shown in Figures 26 and 27, the first bridge arm includes a first upper bridge arm switch tube 301 and a second lower bridge arm switch tube 302, the second bridge arm includes a third upper bridge arm switch tube 303 and a fourth lower bridge arm switch tube 304, and the third bridge arm includes a fifth upper bridge arm switch tube 305 and a 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.

[0239] The first bridge arm includes a first upper-arm switching transistor 301 and a second lower-arm switching transistor 302, with their midpoint connected to a first coil 311. The second bridge arm includes a third upper-arm switching transistor 303 and a fourth lower-arm switching transistor 304, with their midpoint connected to a second coil 312. The third bridge arm includes a fifth upper-arm switching transistor 305 and a sixth lower-arm switching transistor 306, with their midpoint connected to a third coil 313. Six loops are formed in total, each consisting of a switching transistor and a coil. The control module 102 uses a switching control signal to control each loop to turn on one by one, thereby driving the motor to begin operation. The control module 102 generates a switching control signal based on the received switching signal. The switching control signal is used to control the switches in each loop individually. Specifically, the switches in each bridge arm are turned on one by one in response to the switching control signal, thereby driving each motor phase coil with current. As the switches in each bridge arm are gradually turned on, current flows through their respective phase coils, causing the motor to begin rotation. The gradual turning on of the six loops sequentially activates each motor phase in the fan, thereby starting the entire fan system. Specifically, the switch tube of each of the six circuits is turned on in sequence to make each circuit conductive. The first circuit to the sixth circuit are conductive in sequence, and the fan rotates forward. The sixth circuit to the first circuit are conductive in sequence, and the fan rotates reversely.

[0240] After receiving the wind speed adjustment control signal, the control module 102 generates a PWM control signal. For each loop, the PWM control signal is used to adjust its corresponding switch tube, thereby adjusting the speed of the motor.

[0241] As an implementation method, the control module further controls the on-time of the switch tube in each loop through a PWM control signal to adjust the speed of the motor.

[0242] The control module receives wind speed adjustment control signals from the touch control module or voice module. These signals contain user instructions for adjusting the fan speed. Based on the wind speed adjustment control signals, the control module 102 generates corresponding pulse width modulation (PWM) control signals. The duty cycle of the PWM signal (i.e., the ratio of the high-level duration to the total cycle) directly corresponds to the desired fan speed. The control module 102 applies the generated PWM control signals to the two switches in each loop. The specific operation is as follows: the switches in each loop switch on and off according to the duty cycle of the PWM signal. When the PWM signal is high, the switches are turned on; when the PWM signal is low, the switches are turned off. By adjusting the duty cycle of the PWM signal, the on-time of the switches in each loop is controlled, thereby adjusting the current flowing through the motor coils. The motor speed is proportional to the current intensity in the motor coils. By adjusting the on-time of the switches in each loop, the control module 102 can accurately control the current of the high-speed three-phase motor 104, thereby adjusting the speed of the high-speed three-phase motor 104. By gradually increasing or decreasing the duty cycle of the PWM signal, the fan speed can be accelerated or decelerated, thereby achieving the adjustment of the fan speed.

[0243] The technical effect of this embodiment is that the control module generates a corresponding PWM control signal based on the received wind speed adjustment control signal. The duty cycle of the PWM signal directly determines the conduction time of the switch tube in each circuit, thereby controlling the current of the motor coil. Therefore, the motor speed can be accurately adjusted by adjusting the duty cycle of the PWM signal.

[0244] As an embodiment, the portable fan also includes an energy feedback circuit, which is connected to the control module, the motor, and the energy storage unit. When the control module detects a decrease in the PWM duty cycle, it controls the energy feedback circuit to start operating. The back electromotive force generated by the motor deceleration 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 is turned on, converting the kinetic energy of the motor into electrical energy through the rectifier circuit and storing it in a supercapacitor or battery.

[0245] For example, a portable fan is running at high speed. The user uses the input module to reduce the wind speed or stop the fan. The control module detects the wind speed adjustment signal or switch signal, reduces the PWM signal duty cycle, and decelerates the motor. The control module generates an energy feedback signal to activate the energy recovery circuit. 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 a supercapacitor or battery. When the fan is restarted, the control module detects the start signal and controls the energy storage unit to release electrical energy to power the motor, reducing the consumption of external power.

[0246] The technical effects of this embodiment are: through energy recovery, kinetic energy can be converted into electrical energy storage when the fan slows down or stops, reducing energy waste; reducing dependence on external power supplies, extending battery life, and improving the endurance of portable fans; users can enjoy more stable and lasting wind speed adjustment during use, improving the overall user experience.

[0247] As an embodiment, the input module 101 includes a voice module 112 and a touch module 111, both of which are connected to the control module 102. The voice module 112 and the touch module 111 respectively output switching signals and wind speed adjustment control signals according to user instructions, and the control module 102 generates switching control signals and PWM control signals according to the switching signals and wind speed adjustment control signals.

[0248] The technical effect of this embodiment is that the combination of the voice module and the touch module allows users to choose the most suitable operation method according to their own preferences, thereby increasing the intelligence of the product.

[0249] As an embodiment, the input module 101 includes a voice module 112 and a touch module 111. The voice module 112 and the touch module 111 are both 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. The touch module 111 outputs a wind speed adjustment control signal. The control module 102 generates a switch control signal and a PWM control signal according to the switch signal and the wind speed adjustment control signal, respectively.

[0250] The user sends a command to turn the touch module on or off to the voice module 112 via voice commands, and the voice module 112 transmits these commands to the control module 102. The user sends a command to turn the fan on or off to the voice module 112 via voice commands, and the voice module 112 generates a switch signal based on the user's command and transmits it to the control module 102. When the touch module 111 is enabled, the user inputs a wind speed adjustment command to the touch module 111 through a touch operation (such as sliding or clicking). The touch module 111 generates a wind speed adjustment control signal based on the user's operation and transmits it to the control module 102. The control module 102 enables or disables the touch module 111 based on the command from the voice module 112. When the touch module 111 is disabled, all touch operations will not generate a wind speed adjustment control signal, thereby avoiding misoperation. After receiving the switch signal, the control module 102 generates a switch control signal for turning the fan on or off. 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 motor speed.

[0251] The technical effects of this embodiment are: the touch module is enabled or disabled through voice commands. The user can disable the touch module through voice when holding the fan, avoiding incorrect wind speed adjustment operations caused by accidental touch, thereby improving the user's operating experience and product safety; the switch signal generated by the voice module is processed by the control module to ensure that the fan's switch operation is accurate; when the touch module is enabled, it 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 the signal to achieve precise adjustment of the fan speed to meet the user's personalized needs.

[0252] As an example, as shown in FIG28 , which is a circuit diagram of the driving module 103 , the driving module 103 includes a first driving sub-module, a second driving sub-module, and a third driving sub-module.

[0253] The first driver submodule includes a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q7, a capacitor C16, a capacitor C21, a capacitor C27, a resistor R20, a resistor R24, a resistor R25, and a resistor R26. The first end of the capacitor C16, the first end of the resistor R24, the source of the MOS transistor Q2, the first end of the capacitor C21, and the first end of the capacitor C27 are connected to a power supply. The second end of the capacitor C16 is connected to the second end of the resistor R24, the drain of the MOS transistor Q1, and the gate of the MOS transistor Q2. The gate of the MOS transistor Q1 is connected to the first end of the resistor R20 and the first control signal terminal U_H, respectively. The source of the MOS transistor Q1 and the second end of the resistor R20 are commonly grounded. The drain of the MOS transistor Q2 is connected to the drain of the MOS transistor Q7 and the first end of the first coil, respectively. The gate of the MOS transistor Q7 is connected to the first end of the resistor R25 and the second control signal terminal U_L, respectively. The source of the MOS transistor Q7 is connected to the second end of the resistor R25 and the first end of the resistor R26, respectively. The second end of the capacitor C21 and the second end of the capacitor C27 are commonly grounded.

[0254] The second driver submodule includes a MOS transistor Q3, a MOS transistor Q4, a MOS transistor Q8, a capacitor C26, a capacitor C25, a resistor R32, a resistor R34, a resistor R35, and a resistor R38. A first end of capacitor C26, a first end of resistor R34, a source of MOS transistor Q4, and a first end of capacitor C25 are commonly connected to a power supply. A second end of capacitor C26 is respectively connected to the second end of resistor R34, the drain of MOS transistor Q3, and the gate of MOS transistor Q4. The gate of MOS transistor Q3 is connected to the first end of resistor R32 and the third control signal terminal V_H. The source of MOS transistor Q3 and the second end of resistor R32 are commonly grounded. The drain of MOS transistor Q4 is respectively connected to the drain of MOS transistor Q8 and the first end of the second coil. The gate of MOS transistor Q8 is respectively connected to the first end of resistor R35 and the fourth control signal terminal V_L. The source of MOS transistor Q8 is respectively connected to the second end of resistor R35 and the first end of resistor R38. The second end of capacitor C25 is connected to ground.

[0255] The third driving submodule includes a MOS transistor Q5, a MOS transistor Q6, a MOS transistor Q9, a capacitor C32, a capacitor C35, a resistor R42, a resistor R46, a resistor R49 and a resistor R51. The first end of the capacitor C32, the first end of the resistor R46, the source of the MOS transistor Q6 and the first end of the capacitor C35 are connected to a power supply. The second end of the capacitor C32 is connected to the second end of the resistor R46, the drain of the MOS transistor Q5 and the gate of the MOS transistor Q6 respectively. The gate of the MOS transistor Q5 is connected to the first end of the resistor R42 and the drain of the MOS transistor Q6. The fifth control signal terminal W_H, the source of the MOS transistor Q5, and the second end of the resistor R42 are commonly connected to ground. The drain of the MOS transistor Q6 is respectively connected to the drain of the MOS transistor Q9 and the first end of the third coil. The gate of the MOS transistor Q9 is respectively connected to the first end of the resistor R49 and the sixth control signal terminal W_L. The source of the MOS transistor Q9 is respectively connected to the second end of the resistor R49 and the first end of the resistor R51. The second end of the capacitor C25 is connected to ground. The second end of the resistor R26, the second end of the resistor R38, and the second end of the resistor R51 are commonly connected to ground.

[0256] 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 arm switch transistor, the third coil, the second coil, MOS transistor Q8 and resistor R38 form a sixth loop.

[0257] Among them, the MOS transistors Q2, MOS transistors Q4, and MOS transistors Q6 can be NMOS transistors or PMOS transistors. The half-bridge driving mode of the MOS transistors Q2, MOS transistors Q4, and MOS transistors Q6 can adopt the driving mode in the circuit diagram as well as other driving modes, such as capacitor energy storage driving, transformer coupling driving, optical coupling driving, etc.

[0258] The control module 102 inputs switch control signals to the two switching transistors in each circuit via the first through sixth control signal terminals. The control module 102 uses the switch control signals to control the first through sixth circuits to conduct one after another in a preset sequence, thereby driving the motor to begin operation. The control module 102 inputs PWM control signals to the two switching transistors in each circuit via the first through sixth control signal terminals. The duty cycle of the PWM control signals controls the conduction current of each circuit to adjust the motor speed.

[0259] As an implementation method, as shown in Figure 29, in this implementation method, the two switching tubes of each bridge arm are integrated together, MOS tube Q2 and MOS tube Q7 are integrated into chip S1, MOS tube Q4 and MOS tube Q8 are integrated into chip S2, and MOS tube Q6 and MOS tube Q9 are integrated into chip S3. The integrated switching tubes can significantly reduce the occupied space on the circuit board, making the driving circuit more compact. The use of integrated switching tube modules simplifies circuit design and layout, and reduces wiring complexity.

[0260] As an embodiment, as shown in Figure 30, 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, which are respectively connected to the control module 102, and the portable fan also includes a misting module 203, a cooling module 204, a heating module 205, a lighting module 206 and a shaking head module 207, which are respectively connected to the control module 102.

[0261] The manual switch module 201 may be a key switch or an encoder, the touch module 111 may be a touch key, a sliding resistor, a touch sliding module or a touch screen module, and the wireless module 202 may be a mobile control module, a Bluetooth control module or a wireless control module;

[0262] Among them, the push-button switch allows manual fan control, turning the fan on and off, or adjusting its speed, by pressing a button. The encoder is used to adjust the fan speed; rotating the encoder changes the fan speed setting. The touch button uses touch sensing to control the fan's on and off and wind speed. The sliding resistor allows the fan to be adjusted by sliding the resistor value, providing continuous wind speed adjustment. The touch-slide module adjusts the wind speed through sliding gestures, detecting sliding parameters such as speed, direction, and position to control the wind speed. The touch screen module provides a graphical interface, allowing the control of various functions such as turning the fan on and off, adjusting the wind speed, and setting the timer through the touch screen. The voice control module allows the fan to be turned on and off, and the wind speed to be adjusted, through voice commands, enhancing the intelligent control experience. The networked voice control module connects to the internet and uploads voice commands to a cloud server for processing, enabling remote voice control. The networked module enables remote control via the internet, allowing various fan functions to be remotely controlled via a mobile phone or other device. The mobile control module allows the control of various fan functions, including turning the fan on and off, adjusting the wind speed, and setting the timer, via a mobile device (such as a mobile phone or tablet). The Bluetooth control module can connect to a mobile device via Bluetooth to achieve short-range wireless control of the fan. The wireless control module can realize remote control and management of the fan through wireless signals (such as Wi-Fi). The atomization module 203 can provide a humidification function, and make the wind blown out by the fan cooler and more moist by atomizing water. The refrigeration module 204 can provide a refrigeration function, and reduce the outlet air temperature through the internal refrigeration element to improve the cooling effect. The heating module 205 can provide a heating function, and make the wind blown out by the fan warm through the internal heating element, which is suitable for cold seasons. The lighting module 206 can provide a lighting function, integrate LED lights or other light sources, and provide night lighting or decorative lighting effects. The shaking head module 207 can provide an automatic shaking head function, so that the fan can swing left and right, increase the wind coverage, and improve comfort.

[0263] 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 operational convenience, meeting various needs in different usage scenarios.

[0264] It should be noted that all input, output and control functions of a portable fan can be integrated into a single chip or integrated circuit. This integration can simplify the design and manufacturing process of the system, reduce the number of components and space occupation, and may also reduce costs and power consumption.

[0265] The portable fan based on a high-speed three-phase motor provided in the first embodiment includes at least a handheld fan for handheld use, a desktop fan for portability and tabletop use, or a neck-hanging fan for neck use. The structure of the portable fan includes but is not limited to the following embodiments:

[0266] As an embodiment, this embodiment provides a portable fan based on a high-speed three-phase motor, which can be used as a handheld fan. As shown in FIG31 , which is an exploded view of the portable fan, the portable fan includes:

[0267] Handle left shell 81, handle right shell 82, air outlet front shell 83, middle shell 84, air outlet 85, button 86, wave switch button 87, hanging wire groove 88, shock-absorbing silicone 89, shock-absorbing silicone 90, air inlet net 91, light-shielding foam 92, battery foam 93, silicone gasket 94, motor assembly 95, screw 96, screw 97, battery 98 and PCB 99.

[0268] As an embodiment, this embodiment provides a portable fan based on a high-speed three-phase motor, which can be used as another handheld fan. As shown in FIG32 , which is an exploded view of the portable fan, the portable fan includes:

[0269] Front shell decoration 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 decoration 412, screw cover 413, screw 414, roller assembly 415, button decoration 416, safety supervision office fixing bracket 417, roller switch small plate 418, screw 419, wave switch small plate 420, mainboard fixing bracket 421, wave switch 422, handle bracket 423, battery pack 424, handle 425, handle decoration 426, lanyard bracket 427, screw 428 and snap ring 429.

[0270] As an embodiment, this embodiment provides a portable fan based on a high-speed three-phase motor, which can be used as a portable desktop fan that can be placed on a desktop. As shown in Figures 33 to 35, which are exploded views of the portable fan, the portable fan includes:

[0271] Screen casing 1, screen front casing 2, character light-transmitting patch 3, screen light-transmitting bracket 4, digital screen PCB 5, self-tapping screws 6, screen back casing 7, screws 8, shock-absorbing silicone ring 9, shock-absorbing EVA 10, fan motor bracket 11, motor 12, snap ring 13, gasket 14, fan bearing 15, motherboard, digital screen PCB connecting line 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 with foam at both ends 28, air filter element 29, filter element bracket 30, back cover 31, copper nut 32, countersunk machine screw 33, housing wire snap ring 34, wire pressure cover 35, base Wire clamp 36, shaft 37, air duct wire cover 38, left shaft plug 39, right shaft plug 40, wire shielding cover 41, aluminum alloy bracket 42, machine screw 43, base upper shell 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 plate 63, self-tapping screw 64, charging board 65, charging board bracket 66, base lower shell 67, battery pack 68, battery EVA 69, base bottom shell 70, label 71 and foot pad 72.

[0272] As an embodiment, this embodiment provides a portable fan based on a high-speed three-phase motor, which can be used as a neck-hanging fan. As shown in Figure 36, it is an exploded view of the portable fan. The portable fan includes: a neck support 501, an air inlet 502, an air outlet 503 and a clamping arm 504.

[0273] Example 3

[0274] Please refer to Figures 37 and 38. Figure 37 is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 38 is a schematic diagram of the exploded structure of the portable fan of this embodiment.

[0275] As shown in Figures 37 and 38, a portable fan includes a fan housing 1, a fan motor 2, and fan blades 3. The fan motor 2 is disposed within the fan housing 1; the fan blades 3 are provided with a first balancing ring portion 33 and a second balancing ring portion 34, wherein the diameter of the first balancing ring portion 33 is larger than the diameter of the second balancing ring portion 34.

[0276] In the above embodiment, the fan motor 2 and fan blades 3 of the portable fan are arranged in the fan housing 1, and a first balancing ring portion 33 and a second balancing ring portion 34 are provided on the fan blades 3. By filling the corresponding positions of the first balancing ring portion 33 and the second balancing ring portion 34 with balancing soil, the mass distribution of the fan blades 3 is balanced, thereby improving the rotation efficiency and stability of the fan blades 3. At the same time, the two adjustment ring portions of the first balancing ring portion 33 and the second balancing ring portion 34 can increase the adjustable space of the fan blades 3, thereby achieving the purpose of balancing the mass deviation formed by the fan blades 3 over a large range. The diameter of the first balancing ring portion 33 is larger than the diameter of the second balancing ring portion 34. During the rotation of the fan blades 3, the torque of the first balancing ring portion 33 is greater than the torque of the second balancing ring portion 34. The same mass of balancing soil produces different regulating effects on the first balancing ring portion 33 and the second balancing ring portion 34. Therefore, this structure has different levels of balancing effect on the fan blades 3. The combination of the two can achieve more accurate mass balancing, thereby greatly improving the rotation efficiency and stability of the fan blades 3.

[0277] In this embodiment, the fan housing 1 is constructed in a cylindrical shape, and a cylindrical air cavity is defined inside the cylinder. However, the shape of the fan housing 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the fan housing 1 can be: a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes.

[0278] In this embodiment, the fan housing 1 is provided with an air cavity extending through its upper and lower surfaces, and the air cavity is cylindrical. However, the shape of the air cavity is not limited thereto. Depending on the specific application scenario, in some embodiments, the air cavity can be shaped like a star, a heart, a racetrack, or a polygon.

[0279] In some embodiments, a horn or a fairing with a necked opening is further provided in the fan housing 1 .

[0280] The fan motor 2 is disposed within the fan housing 1 via a connector 4. In some embodiments, the connector 4 includes a connecting ring 41 and a plurality of connecting plates 42. The connecting plates 42 are disposed around the connecting ring 41. One end of each of the connecting plates 42 is connected to the inner surface of the fan housing 1, and the other end of each connecting plate 42 is connected to the connecting ring 41. Adjacent connecting plates 42 from the plurality of connecting plates 42 enclose an air duct. The connecting ring 41 and the fan motor 2 are interference-fitted or snap-fitted, or a connecting post 43 is provided on the connecting ring 41. The fan motor 2 is sleeved on the connecting post 43.

[0281] Please refer to Figures 39 and 40. Figure 39 is a schematic structural diagram of the fan housing of this embodiment from a first perspective; Figure 40 is a schematic structural diagram of the fan housing of this embodiment from a second perspective.

[0282] As shown in Figures 39 and 40, the arrangement of multiple connecting plates 42 enables the connecting ring 41 to be suspended in the fan housing 1. Every two connecting plates 42 among the multiple connecting plates 42 form an air duct, which enables the airflow pushed by the fan assembly to flow through the air duct.

[0283] The connection member 4 is not limited to this. Depending on the specific application scenario, in some embodiments, the connection member 4 can be a connector formed perpendicular to the inner surface of the fan housing 1.

[0284] The fan motor 2 is fixed to the connecting ring 41. However, the fixing method of the fan motor 2 is not limited to this. Depending on the specific application scenario, in some embodiments, the connecting ring 41 is provided with a connecting post 43, and the fan motor 2 can be sleeved on the connecting post 43. The connecting post 43 can be integrally formed with the connecting ring 41, or can be fixed to the connecting ring 41 by means of clamping, riveting, screw connection, or gluing.

[0285] In some embodiments, the fan motor 2 includes a coil 22 and a magnetic ring 23. The coil 22 is sleeved on a connecting post 43 and has an interference fit with the connecting post 43. The magnetic ring 23 is disposed within the fan blade 3. One end of the rotating shaft 21 is connected to the fan blade 3, and the other end is connected to the connecting post 43.

[0286] In some embodiments, the fan motor 2 includes a coil 22, a magnetic ring 23, and a motor housing 24. The coil 22 is sleeved on a connecting post 43 and has an interference fit with the connecting post 43. The magnetic ring 23 is disposed within the motor housing 24 and sleeved on the coil 22. One end of the rotating shaft 21 is connected to the fan blades 3, and the other end is connected to the connecting post 43 and has an interference fit with the motor housing 24.

[0287] In some embodiments, the fan motor 2 is a conventional motor, which is fixed to the connecting ring 41 by means of clamping, screw fixing, riveting, adhesive connection, welding, etc.

[0288] In some embodiments, the fan motor 2 can be connected to the fan housing 1 via a structure within the fan housing 1. For example, a connecting platform is provided on the inner wall of the fan housing 1, and the connecting platform is connected to the fan motor 2. Alternatively, a connecting rod is extended into the fan housing 1, and the fan motor 2 is fixed to the connecting rod. Alternatively, two opposing clamping portions extend inward from the inner surface of the fan housing 1 to clamp and secure the fan motor 2.

[0289] In some embodiments, an abutment plate extends from the inside of the fan housing 1 toward the fan motor 2 to fix the fan motor 2 by clamping, or a support structure extends laterally from the inside of the fan housing 1 to fix the fan motor 2.

[0290] The fan motor 2 is connected to the fan blades 3 via a rotating shaft 21. One end of the rotating shaft 21 is connected to the fan motor 2 and the connecting post 43, and the other end is connected to the fan blades 3. However, the connection method of the rotating shaft 21 is not limited to this. Depending on the specific application scenario, in some embodiments, the end of the rotating shaft 21 connected to the fan motor 2 is also connected to the connecting post 43. In some embodiments, when a magnetic ring 23 is fixed to the fan blades 3, one end of the rotating shaft 21 is only connected to the connecting ring 41 or the connecting post 43, and the other end is connected to the fan blades 3.

[0291] In this embodiment, the ratio of the inner diameter of the fan housing 1 to the maximum diameter of the fan blades 3 is in the range of 1.01-1.15. The ratio of the inner diameter of the fan housing 1 to the maximum diameter of the fan blades 3 defines the gap between the fan housing 1 and the maximum diameter of the fan blades 3. When the fan blades 3 rotate, they generate centrifugal force on the airflow flowing through the fan blades 3. Under the action of the centrifugal force, the airflow moves laterally and collides with the inner wall of the fan housing 1, generating turbulence, thereby affecting the airflow field in the fan housing 1, resulting in a low air outlet efficiency of the portable fan. Limiting the ratio of the inner diameter of the fan housing 1 to the maximum diameter of the fan blades 3 to between 1.01-1.15 reduces the gap between the fan blades 3 and the fan housing 1, reduces the travel of the lateral airflow under the action of centrifugal force, and limits the speed of the airflow when it contacts the inner edge of the fan housing 1 to a smaller preferred range. Therefore, this ratio can reduce the energy loss when the airflow collides with the fan housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the fan housing 1 to the maximum diameter of the fan blades 3 is limited to between 1.01-1.15, within this ratio range, the distance between the fan blades 3 and the fan housing 1 is small, which can have an excellent interception effect on the return airflow in the fan blades 3, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blades 3, thereby improving the air intake efficiency of the portable fan. The improvement of the air intake efficiency improves the overall air outlet efficiency of the portable fan.

[0292] Please refer to Figures 41 and 42. Figure 41 is a schematic diagram of the structure of the fan blades of this embodiment from a first perspective; Figure 42 is a schematic diagram of the structure of the fan blades of this embodiment from a second perspective.

[0293] As shown in Figures 41 and 42, both the first balance ring portion 33 and the second balance ring portion 34 are surrounded by a plurality of balance slots 35. The independent balance slots 35, as the smallest balance unit, facilitate quantification of balance adjustment and facilitate leveling by the user. Furthermore, because the balance slots 35 of the first balance ring portion 33 and the second balance ring portion 34 have different torques, the balance slots 35 of the first balance ring portion 33 have a larger torque and can be used for coarse adjustment, while the balance slots 35 of the second balance ring portion 34 have a smaller torque and can be used for fine adjustment. The combination of the two allows for a combination of coarse and fine adjustment, resulting in more precise leveling.

[0294] The number of the balancing slots 35 of the first balancing ring portion 33 can be (but not limited to): 2, 3, 4, 5, 10, 18, 26 or more. The number of the balancing slots 35 of the first balancing ring portion 33 can be arbitrarily set based on actual needs.

[0295] The number of the balancing slots 35 of the second balancing ring portion 34 can be (but not limited to): 2, 3, 4, 5, 11, 18, 26 or more. The number of the balancing slots 35 of the second balancing ring portion 34 can be arbitrarily set based on actual needs.

[0296] In some embodiments, the first balance ring portion 33 is configured as an annular groove, and the second balance ring portion 34 is also configured as an annular groove.

[0297] In some embodiments, the number of balancing slots 35 in the first balancing ring portion 33 is greater than the number of balancing slots 35 that comprise the second balancing ring portion 34. This greater number of balancing slots 35 in the first balancing ring portion 33 than in the second balancing ring portion 34 allows for a wider adjustable range for the first balancing ring portion 33, thereby increasing the adjustable space for the fan blades 3. Furthermore, because the first balancing ring portion 33 exerts a greater torque and has a greater number of balancing slots 35, this maximizes the upper limit of the range within which the fan blades 3 can be leveled, thereby increasing the adaptability of the fan blades 3 to various scenarios.

[0298] The balancing groove 35 of the first balancing ring portion 33 is configured in a square shape. However, the shape of the balancing groove 35 of the first balancing ring portion 33 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the balancing groove 35 of the first balancing ring portion 33 can be (but not limited to) circular, elliptical, semicircular, semi-elliptical, racetrack-shaped, wedge-shaped, or other polygonal shapes other than a quadrilateral.

[0299] The balancing groove 35 of the second balancing ring portion 34 is configured in a wedge shape. However, the shape of the balancing groove 35 of the second balancing ring portion 34 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the balancing groove 35 of the second balancing ring portion 34 can be (but not limited to) circular, elliptical, semicircular, semi-elliptical, racetrack-shaped, polygonal, etc.

[0300] The fan blades 3 include: a hub 31 and a plurality of moving blades 32 . The plurality of moving blades 32 extend obliquely around the surface of the hub 31 . The hub 31 is connected to the rotating shaft 21 .

[0301] In this embodiment, the number of the moving blades 32 is 9. However, the number of the moving blades 32 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of the moving blades 32 can be (but not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11, or more.

[0302] The first balancing ring portion 33 and the second balancing ring portion 34 are both arranged on the surface of the hub 31. This arrangement of the first balancing ring portion 33 and the second balancing ring portion 34 facilitates the filling of balancing soil and makes the leveling work more convenient.

[0303] In some embodiments, the first balancing ring portion 33 is disposed on the inner surface of the hub 31, and the second balancing ring portion 34 is disposed on the outer surface of the hub 31. This arrangement of the first balancing ring portion 33 and the second balancing ring portion 34 allows for more direct adjustment of mass imbalances on the inner surface of the hub 31. Furthermore, the balancing soil within the first balancing ring portion 33 maintains a more stable connection due to the centrifugal force of the rotating fan blades 3.

[0304] The hub 31 includes: a top surface 311, a bottom surface 313 and a side 312. The cross-sectional area of ​​the bottom surface 313 is larger than the cross-sectional area of ​​the top surface 311, and there is a smooth transition between the top surface 311 and the side 312. The first balance ring portion 33 is arranged on the side 312 and connected to the bottom surface 313, and the second balance ring portion 34 is arranged on the side 312.

[0305] Specifically, in this embodiment, the hub 31 is constructed in the shape of a bullet with a flat head. This shape allows the airflow passing through the moving blades 32 to flow along the curved surface formed by the smooth transition between the top surface 311 and the side edges 312, creating a Coanda effect. This effectively guides the airflow, improves the efficiency of the airflow flowing through the fan blades 3, and thus enhances the air output efficiency of the portable fan.

[0306] The first balancing ring portion 33 is disposed on the side edge 312 and communicates with the bottom surface 313. The second balancing ring portion 34 is also disposed on the side edge 312. The first balancing ring portion 33 is positioned at the location of the wheel hub 31 where the torque is greatest, maximizing the leveling effect of the first balancing ring portion 33 and raising the upper limit of leveling. The combination of the first balancing ring portion 33 and the second balancing ring portion 34 allows for more consistent leveling of the fan blades 3, improving the upper limit and accuracy of leveling.

[0307] However, the shape of the hub 31 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the hub 31 can be (but not limited to): hemispherical, conical, truncated cone, cylindrical, etc.

[0308] The top surface 311 of the hub 31 is a circular surface. However, the shape of the top surface 311 is not limited thereto. Depending on the specific application scenario, in some embodiments, the top surface 311 of the hub 31 can also be conical, polygonal, elliptical, or other shapes.

[0309] The bottom surface 313 of the hub 31 has an opening that communicates with the internal accommodating cavity of the hub 31. A connecting sleeve is disposed within the accommodating cavity. In some embodiments, the connecting sleeve is surrounded by a plurality of reinforcing ribs, one end of each rib being connected to the connecting sleeve and the other end being connected to the inner surface of the hub 31.

[0310] Each of the multiple moving blades 32 includes a first end 321 and a second end 322 opposite to the first end 321, the length of the first end 321 is greater than the length of the second end 322, the first balance ring portion 33 is arranged on a side adjacent to the second end 322, and the second balance ring portion 34 is arranged on a side adjacent to the first end 321.

[0311] The first end 321 is located adjacent to the top surface 311 of the hub 31, and the second end 322 is located adjacent to the bottom surface 313 of the hub 31. In each blade 32, the first end 321 is used to push air into the fan blade 3 when the fan blade 3 rotates. The longer length of the first end 321 facilitates the promotion of airflow. The second end 322 is located at the end of the airflow direction. The reduced length of the second end 322 helps to reduce the size of the airflow space, compress the airflow, increase the initial kinetic energy of the airflow, and thus improve the air output efficiency of the portable fan.

[0312] In some embodiments, the length ratio of the first end 321 to the second end 322 is in the range of 1.4-1.9. As the airflow through the fan flows from the first end 321 to the second end 322, the first end 321 gradually decreases in the direction facing the second end 322. This decrease, combined with the size change of the hub 31, gradually reduces the space for the airflow to flow, gradually pressurizing the convection and increasing the initial velocity of the airflow. However, due to the gap between the fan blades 3 and the fan housing 1, when the pressure of the airflow entering the first end 321 and flowing out of the second end 322 is significantly too high, the airflow will backflow due to the lack of a completely enclosed space. The backflow will impact the portable fan's intake airflow, forming a cyclone and reducing the portable fan's air intake efficiency. By limiting the length ratio of the first end 321 to the second end 322 to a range of 1.4-1.9, within this ratio range, the airflow pressure through the fan blades 3 is adjusted within the optimal range, minimizing the backflow problem caused by excessive air pressure. At the same time, within this ratio range, the first end portion 321 can most effectively intercept and utilize the return airflow that gradually overflows from the edge of the moving blade 32, minimizing the probability of the return airflow flowing out of the fan housing 1. The combination of these two functions allows the airflow entering the first end portion 321 and the airflow outflowing the end portion to approach the optimal ratio of 1:1, significantly improving the air output efficiency of the fan blade 3.

[0313] The first balancing ring portion 33 is arranged on a side adjacent to the second end portion 322, and the second balancing ring portion 34 is arranged on a side adjacent to the first end portion 321. The first balancing ring portion 33 and the second balancing ring portion 34 are arranged on both sides of the moving blade 32, and the spatial layout is reasonable, which will not affect the normal layout of the surface of the fan blade 3. The first balancing ring portion 33 and the second balancing ring portion 34 distributed on both sides of the moving blade 32 can better adjust the imbalance problem of the fan blade 3 caused by the uneven mass distribution of the moving blade 32. At the same time, the distance between the first balancing ring portion 33 and the second balancing ring portion 34 is greater than the length of the moving blade 32, which can expand the leveling coverage of the first balancing ring portion 33 and the second balancing ring portion 34 to the entire fan page, thereby improving the leveling range.

[0314] Each moving blade 32 has a blade edge 323. The thickness of each moving blade 32 gradually increases from the first end 321 to the blade edge 323 and gradually decreases from the blade edge 323 to the second end 322. The varying thicknesses of the moving blades 32 at different locations result in each moving blade 32 being thinner at both ends and thicker in the middle. This structure enhances the airflow-cutting capabilities of the blades 32 at both ends and reduces air resistance at both ends. The increased thickness in the middle enhances the physical strength of the blades 32. Furthermore, the increased thickness of the blades 32 reduces the space between adjacent blades 32, thereby boosting the pressure of the airflow.

[0315] The second balancing ring portion 34 is positioned between the top surface 311 and the first end portion 321. The multiple balancing grooves 35 of the second balancing ring portion 34 are collectively configured in a truncated cone shape. Because the cross-sectional area of ​​the hub 31 increases from the top surface 311 to the bottom surface 313, the side edges 312 of the hub 31 are configured in an arc shape. The multiple balancing grooves 35 of the second balancing ring portion 34 are collectively configured in a truncated cone shape, which optimizes their distribution, aligns with the changing shape of the sidewall, and improves space utilization.

[0316] The multiple balancing grooves 35 of the first balancing ring portion 33 are arranged in pairs between two adjacent moving blades 32. The adjacent two balancing grooves 35 of the first balancing ring portion 33 are separated by a first partition plate 331 or a second partition plate 332. Along the circumferential direction of the hub 31, the length of the second partition plate 332 is greater than the length of the first partition plate 331.

[0317] The plurality of balancing grooves 35 of the first balancing ring portion 33 are arranged in pairs between two adjacent moving blades 32. This design rationally utilizes the space of the fan blades 3, increases the number of balancing grooves 35 that can be arranged on the first balancing ring portion 33, and improves the ability to level the fan blades 3.

[0318] Two adjacent balancing grooves 35 of the first balancing ring portion 33 are separated by a first partition plate 331 or a second partition plate 332. Each independent balancing groove 35 serves as the minimum leveling unit of the first balancing ring portion 33. The balancing grooves 35 are isolated from each other, avoiding mutual interference when filling balancing soil between the balancing grooves 35, thereby improving filling efficiency.

[0319] Along the circumferential direction of the hub 31, the length of the second spacer 332 is greater than that of the first spacer 331. This change in the spacing length causes the leveling capability of the first balancing ring portion 33 to not only add to the unit leveling capability, but also to have a numerical span. This span change, combined with the fine-tuning capability of the second balancing ring portion 34, which complements the numerical span, can quickly achieve leveling.

[0320] In some embodiments, the second partition 332 is connected to the second end 322 of the moving blade 32. This connection method fully utilizes the space of the fan blade 3, extends the length of the moving blade 32, and improves the air outlet efficiency of the fan blade 3.

[0321] The portable fan housing 1 is provided with a flexible sleeve 5, on which annular protrusions 51 and dot-shaped protrusions 52 are alternately provided. This improves the anti-fall performance of the portable fan and, when used in combination, can reduce the noise and vibration of the portable fan.

[0322] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination should not be limited to the combination listed in this embodiment.

[0323] Example 4

[0324] Please refer to Figures 43 and 44. Figure 43 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 44 is a schematic diagram of the decomposed structure of the fan module of this embodiment.

[0325] As shown in Figures 43 and 44, a fan module includes: a housing 1, a connector 2, a fan motor 3, fan blades 4, and a buffer 5. The connector 2 is disposed within the housing 1; the fan motor 3 is disposed within the housing 1, with one end of the fan motor 3 connected to the connector 2; the fan blades 4 are disposed within the housing 1, and are sleeved on the fan motor 3; and the buffer 5 is disposed between the fan blades 4 and the connector 2.

[0326] In this embodiment, the housing 1 is cylindrical, and a cylindrical air cavity 11 is defined within the cylinder. However, the shape of the housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes.

[0327] Please refer to Figure 45, which is a structural diagram of the shell of this embodiment from a top view.

[0328] As shown in Figure 45, in this embodiment, the housing 1 is provided with an air cavity 11 extending through its upper and lower surfaces. The air cavity 11 is cylindrical. However, the shape of the air cavity 11 is not limited thereto. Depending on the specific application scenario, in some embodiments, the air cavity 11 can be shaped like a star, a heart, a racetrack, or a polygon.

[0329] Please refer to FIG46 , which is a schematic diagram of the three-dimensional structure of the shell of this embodiment when viewed from above.

[0330] As shown in Figure 46, the connector 2 includes a connecting ring 21, connecting posts 23, and a plurality of connecting plates 22. The plurality of connecting plates 22 are arranged around the connecting ring 21, with one end of each connecting plate 22 connected to the inner surface of the housing 1, and the other end of each connecting plate 22 connected to the connecting ring 21.

[0331] The connecting column 23 is arranged on the side of the connecting ring 21 facing the fan blades 4. The connecting column 23 includes: a connecting cone 231 and a connecting cylinder 232. The bottom surface of the connecting cone 231 is arranged on the connecting ring 21, and the top surface of the connecting cone 231 is connected to the connecting cylinder 232. The coil 32 is sleeved on the connecting cylinder 232.

[0332] The structure of the connecting column 23 enables the connecting cone 231 to play a limiting role, and acts as a stop for the fan assembly mounted on the connecting cylinder 232, thereby improving the assembly efficiency of the coil 32.

[0333] In some embodiments, the connecting pillar 23 can also be configured as a prism or a circular pillar.

[0334] The arrangement of the connecting column 23 enables the fan motor 3 and the fan blades 4 to be suspended inside the housing 1 , so that the fan motor 3 and the fan blades 4 can rotate more smoothly inside the housing 1 .

[0335] The arrangement of the connecting ring 21 and the plurality of connecting plates 22 allows the connecting ring 21 to be suspended inside the housing 1. At the same time, the gaps between the connecting plates 22 can serve as air ducts for the air flow inside the housing 1, thereby restricting the air flow inside the housing 1.

[0336] The end of each connecting plate 22 facing the fan blade 4 is bent and extended toward the fan blade 4 to form an air guide plate 24 . The bending direction of the air guide plate 24 is opposite to the rotation direction of the fan blade 4 .

[0337] The end of each connecting plate 22 facing the fan blade 4 is bent and extended to form an air guide plate 24. The bending direction of the air guide plate 24 is opposite to the rotation direction of the fan assembly. When the fan blade 4 rotates, it will drive the airflow to rotate in the same direction. At this time, the bending direction of the air guide plate 24 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the curved part of the air guide plate 24. Due to the opposite directions, the angle between the airflow and the curved part of the air guide plate 24 is greater than 90 degrees. The airflow contacts the air guide plate 24 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the air guide plate 24. During the contact process at a larger angle, the air guide plate 24 has an obvious guiding effect on the airflow, with little energy loss, which greatly improves the air outlet efficiency.

[0338] In this embodiment, the number of connecting plates 22 is 7. However, the number of connecting plates 22 is not limited thereto, and in some embodiments, the number of connecting plates 22 can be 2, 3, 4, 5, 6, 8, or more, depending on the specific application scenario.

[0339] In this embodiment, the number of air deflectors 24 is also 7, corresponding to the number of connecting plates 22. However, the number of air deflectors 24 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of air deflectors 24 can be 2, 3, 4, 5, 6, 8, or more.

[0340] In some embodiments, the connecting plate 22 and the air guide plate 24 adopt a split structure, that is, the connecting plate 22 and the air guide plate 24 are independently provided, and one end of the connection between the connecting plate 22 and the air guide plate 24 can be docked together or separated from each other.

[0341] The air guide plate 24 is disposed between the fan blades 4 and the housing 1 , and the air guide plate 24 is connected to the inner surface of the housing 1 , with a gap between the air guide plate 24 and the fan blades 4 .

[0342] Air deflector 24 is disposed between fan blades 4 and housing 1, with a gap between air deflector 24 and fan blades 4. Due to the gap between air deflector 24 and fan blades 4, after airflow contacts air deflector 24, part of the airflow flows along the guide of air deflector 24 toward the air outlet, while the remaining airflow flows through the gap between air deflector 24 and fan blades 4 to the next air deflector 24. The gap between air deflector 24 and fan blades 4 provides a channel for air pressure balance between air deflectors 24, avoiding the problem of inconsistent air pressure on both sides of air deflector 24 due to the complete closure of air deflector 24, which in turn affects the air output efficiency of the fan module.

[0343] Please refer to FIG. 47 , which is a schematic cross-sectional view of the fan module of this embodiment.

[0344] As shown in Figure 47, the fan motor 3 includes: a coil 32, a magnetic ring 33 and a rotating shaft 31. A connecting column 23 is provided on the side of the connecting part 2 facing the fan blades 4. The coil 32 is sleeved on the connecting column 23, the magnetic ring 33 is sleeved on the coil 32, and the fan blades 4 are sleeved on the magnetic ring 33. One end of the rotating shaft 31 is connected to the fan blades 4, and the other end of the rotating shaft 31 is inserted into the connecting column 23. The buffer part 5 is arranged between the connecting column 23 and the fan blades 4.

[0345] In some embodiments, when the connecting post 23 includes a connecting cone 231 and a connecting cylinder 232, the coil 32 is sleeved on the connecting cylinder 232, with one end of the coil 32 abutting against the connecting cone 231. The connecting cone 231 can define the position of the coil 32, facilitating assembly and positioning of the coil 32.

[0346] The magnetic ring 33 is disposed inside the hub 41 of the fan blade 4, and the magnetic ring 33 and the hub 41 are connected by an interference fit. The inner ring of the magnetic ring 33 is sleeved on the coil 32 and connected to the coil 32 by magnetic coupling. The connection method of the magnetic ring 33, the fan blade 4, and the coil 32 can make the connection between the entire fan motor 3 and the fan blade 4 more compact, and can also save the outer shell structure of the fan motor 3, making the fan motor 3 more lightweight. The fan blade 4 is sleeved on the magnetic ring 33, so that the contact area between the fan blade 4 and the fan motor 3 is larger, and the torque during rotation is smaller. Therefore, the fan blade 4 can be more stable during rotation, the rotation speed is higher, and the air output of the fan module is larger.

[0347] In some embodiments, the fan motor 3 further includes a metal ring 34, which is sleeved on the magnetic ring 33, and the fan blades 4 are sleeved on the metal ring 34. The provision of the metal ring 34 can protect the magnetic ring 33 and prevent the magnetic ring 33 from being damaged during the assembly process.

[0348] The buffer member 5 is mounted on the rotating shaft 31. The connecting post 23 has a connecting hole 25 formed therein. A first sleeve 26 and a second sleeve 27 are disposed at either end of the connecting hole 25. The rotating shaft 31 is inserted into and passes through the first sleeve 26 and the second sleeve 27. The arrangement of the first sleeve 26 and the second sleeve 27 improves the linear stability of the rotating shaft 31 during rotation, thereby making the rotation of the fan blades 4 more stable and improving the air output efficiency.

[0349] The end of the rotating shaft 31 that passes through the second sleeve 27 has a slot, and an annular retaining ring 35 is disposed in the slot. The annular retaining ring 35 has an opening to allow it to be removed. The diameter of the annular retaining ring is larger than the diameter of the inner ring of the second sleeve 27. Therefore, the annular retaining ring prevents the rotating shaft 31 from falling out of the second sleeve 27 and the first sleeve 26.

[0350] In some embodiments, a sealing ring 36 is provided between the annular retaining ring 35 and the second sleeve 27 .

[0351] The buffer member 5 is constructed in a tower shape and is sleeved on the rotating shaft 31. The buffer member 5 is sleeved on the rotating shaft 31 to prevent the buffer member 5 from being displaced when the fan blades 4 rotate, thereby preventing the normal rotation of the fan blades 4.

[0352] The buffer member 5 is constructed in a tower shape. When compressed, the elastic force of the tower-shaped buffer member 5 increases linearly, effectively buffering and resetting the displacement generated during the rotation of the fan blades 4, making the rotation of the fan blades 4 more stable. The linear increase in elastic force can ensure that the buffering force increases steadily when the fan blades 4 are squeezed by a large external force, achieving a better buffering effect.

[0353] In some embodiments, the shape of the buffer 5 is not limited to a tower shape. Depending on the specific application scenario, the shape of the buffer 5 can be (but not limited to): annular, straight, arc-shaped, spherical, etc.

[0354] In some embodiments, the position of the buffer member 5 is not limited to being mounted on the rotating shaft 31 , and can be disposed on the fan blades 4 or on the connecting column 23 depending on the specific application scenario.

[0355] One end of the buffer 5 is fixedly connected to the connecting column 23, and the other end of the buffer 5 is overlapped with or separated from the fan blades 4. The buffer 5 is connected to the connecting column 23, which prevents the buffer 5 from contacting the fan blades 4 when the fan blades 4 are in normal working condition, interfering with the normal rotation of the fan blades 4, and improving the rotation stability of the fan blades 4 and the air outlet efficiency of the fan module. The other end of the buffer 5 is overlapped with or separated from the fan blades 4. Specifically, when the fan blades 4 are forced to move in the direction of the connecting column 23, the fan blades 4 are overlapped with the buffer 5; when the fan blades 4 rotate normally, they are separated from the buffer 5 to ensure that the fan blades 4 are in the best rotation state. In this embodiment, the buffer 5 can be mounted on the rotating shaft 31 and can also be separated from the rotating shaft 31.

[0356] In this embodiment, the material of the buffer member 5 can be (but is not limited to): a metal spring or a rubber elastomer.

[0357] In this embodiment, a connector 2 for connecting to a fan motor 3 is disposed within the fan module housing 1. Fan blades 4 are connected to the fan motor 3, and a buffer 5 is provided between the fan blades 4 and the connector 2. The buffer 5 limits and cushions the displacement of the fan blades 4, preventing contact between the fan blades 4 and other components within the housing 1 in a confined space, which could lead to wear of the fan blades 42 or reduced rotational efficiency. This improves the rotational efficiency of the fan module and extends its service life.

[0358] In this embodiment, the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 4 is 1.01-1.15. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 4 defines the gap between the housing 1 and the maximum diameter of the fan blades 4. When the fan blades 4 rotate, they generate centrifugal force on the airflow passing through the fan blades 4. Under the action of the centrifugal force, the airflow moves laterally and collides with the inner wall of the housing 1, generating turbulence, thereby affecting the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. Limiting the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 4 to between 1.01-1.15 reduces the gap between the fan blades 4 and the housing 1, reduces the travel of the lateral airflow under the action of centrifugal force, and limits the speed of the airflow when it contacts the inner edge of the housing 1 to a smaller preferred range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the shell 1 to the maximum diameter of the fan blades 4 is limited to between 1.01-1.15, within this ratio range, the distance between the fan blades 4 and the shell 1 is small, which can have an excellent interception effect on the return airflow in the fan blades 4, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blades 4, thereby improving the air intake efficiency of the fan module. The improvement of the air intake efficiency enables the overall air outlet efficiency of the fan module to be improved.

[0359] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination should not be limited to the combination listed in this embodiment.

[0360] Example 5

[0361] Please refer to Figures 48 and 49. Figure 48 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 49 is a schematic diagram of the decomposed structure of the fan module of this embodiment.

[0362] As shown in Figures 48 and 49, a fan module includes a housing 1, a fan motor 3, and fan blades 4. The fan motor 3 is disposed within the housing 1; the fan blades 4 are internally provided with a first cavity 431 and a second cavity 432, which are interconnected. The first cavity 431 is sleeved onto the fan motor 3, and a connecting sleeve 434 is disposed within the second cavity 432. The rotating shaft 31 of the fan motor 3 passes through the first cavity 431 and is connected to the connecting sleeve 434.

[0363] In the above embodiment, the fan motor 3 and the fan blades 4 are disposed within the housing 1. A cavity is defined within the fan blades 4, namely a first cavity 431 and a second cavity 432. The first cavity 431 and the second cavity 432 are interconnected, wherein the first cavity 431 is sleeved on the fan motor 3, and a connecting sleeve 434 is provided in the second cavity 432, which is connected to the rotating shaft 31. Since the first cavity 431 of the fan blades 4 is sleeved on the fan motor 3, the fan motor 3 and the fan blades 4 can be constructed into a conjoined structure, thereby reducing the overall volume of the fan motor 3 and the fan blades 4, and further reducing the overall volume of the fan module. At the same time, since the first cavity 431 is mounted on the fan motor 3 and the rotating shaft 31 is arranged inside the fan blades 4, the weight of the fan blades 4 is not concentrated on one end of the rotating shaft 31, which will not cause the center of mass of the rotating shaft 31 to shift, thereby reducing the probability of vibration of the rotating shaft 31 under high-speed rotation, thereby reducing the probability of abnormal shaking of the fan blades 4, improving the rotation stability of the fan blades 4, and improving the air outlet efficiency of the fan module.

[0364] In this embodiment, the housing 1 is cylindrical, and a cylindrical air cavity 11 is defined within the cylinder. However, the shape of the housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes.

[0365] Please refer to Figure 50, which is a schematic diagram of the overall structure of the shell of this embodiment.

[0366] As shown in Figure 50, in this embodiment, the housing 1 is provided with an air cavity 11 extending through its upper and lower surfaces. The air cavity 11 is cylindrical. However, the shape of the air cavity 11 is not limited thereto. Depending on the specific application scenario, in some embodiments, the air cavity 11 can be shaped like a star, a heart, a racetrack, or a polygon.

[0367] The fan motor 3 in this embodiment includes: a coil 32, a magnetic ring 33 and a rotating shaft 31. A connecting column 23 is provided on the side of the connecting member 2 facing the fan blades 4. The coil 32 is sleeved on the connecting column 23, the magnetic ring 33 is sleeved on the coil 32, and the fan blades 4 are sleeved on the magnetic ring 33. One end of the rotating shaft 31 is connected to the connecting shaft sleeve 434 of the fan blades 4, and the other end of the rotating shaft 31 is inserted into the connecting column 23. The buffer member 5 is arranged between the connecting column 23 and the fan blades 4.

[0368] The buffer member 5 is constructed in a tower shape and is sleeved on the rotating shaft 31. The buffer member 5 is sleeved on the rotating shaft 31 to prevent the buffer member 5 from being displaced when the fan blades 4 rotate, thereby preventing the normal rotation of the fan blades 4.

[0369] The buffer member 5 is constructed in a tower shape. When compressed, the elastic force of the buffer member 5 increases linearly, effectively buffering and resetting the displacement generated during the rotation of the fan blades 4, making the rotation of the fan blades 4 more stable. The linear increase in elastic force can ensure that the buffering force increases steadily when the fan blades 4 are squeezed by a large external force, achieving a better buffering effect.

[0370] In some embodiments, the shape of the buffer 5 is not limited to a tower shape. Depending on the specific application scenario, the shape of the buffer 5 can be (but not limited to): annular, straight, arc-shaped, spherical, etc.

[0371] In some embodiments, the fan motor 3 further includes a metal ring 34, which is sleeved on the magnetic ring 33, and the fan blades 4 are sleeved on the metal ring 34. The provision of the metal ring 34 can protect the magnetic ring 33 and prevent the magnetic ring 33 from being damaged during the assembly process.

[0372] In some embodiments, the fan motor 3 can be a motor with a housing 1. The connector 2 is used to fix the motor in the housing 1.

[0373] The connector 2 includes a connecting ring 21, connecting posts 23, and a plurality of connecting plates 22. The connecting plates 22 are arranged around the connecting ring 21, with one end of each connecting plate 22 connected to the inner surface of the housing 1 and the other end of each connecting plate 22 connected to the connecting ring 21.

[0374] The connecting column 23 is arranged on the side of the connecting ring 21 facing the fan blades 4. The connecting column 23 includes: a connecting cone 231 and a connecting cylinder 232. The bottom surface 412 of the connecting cone 231 is arranged on the connecting ring 21, and the top surface 411 of the connecting cone 231 is connected to the connecting cylinder 232. The coil 32 is sleeved on the connecting cylinder 232.

[0375] The structure of the connecting column 23 enables the connecting cone 231 to play a limiting role, and acts as a stop for the fan assembly mounted on the connecting cylinder 232, thereby improving the assembly efficiency of the coil 32.

[0376] In some embodiments, the connecting pillar 23 can also be configured as a prism or a circular pillar.

[0377] The arrangement of the connecting column 23 enables the fan motor 3 and the fan blades 4 to be suspended inside the housing 1 , so that the fan motor 3 and the fan blades 4 can rotate more smoothly inside the housing 1 .

[0378] Please refer to Figure 51, which is a structural diagram of the fan blade of this embodiment from a first perspective.

[0379] As shown in FIG. 51 , the fan blade 4 includes a hub 41 and a plurality of blades 42 . The plurality of blades 42 are arranged around the hub 41 , and a first cavity 431 and a second cavity 432 are arranged in the hub 41 .

[0380] Please refer to Figures 52 and 53. Figure 52 is a structural schematic diagram of the fan blade of this embodiment from a second perspective; Figure 53 is a structural schematic diagram of the fan blade of this embodiment from a third perspective.

[0381] As shown in Figures 52 and 53, the hub 41 includes a top surface 411, a bottom surface 412, and side edges 413. The cross-sectional area of ​​the bottom surface 412 is larger than the cross-sectional area of ​​the top surface 411, and there is a smooth transition between the top surface 411 and the side edges 413. That is, in this embodiment, the hub 41 is configured to be in the shape of a bullet with a flat head. This shape of the hub 41 enables the airflow passing through the blades 42 to flow along the arc surface formed by the smooth transition between the top surface 411 and the side edges 413, which has a good guiding effect on the airflow, improves the efficiency of the airflow flowing in the fan blades 4, and thus improves the air output efficiency of the fan module.

[0382] However, the shape of the hub 41 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the hub 41 can be (but not limited to): hemispherical, conical, truncated cone, cylindrical, etc.

[0383] The top surface 411 of the hub 41 is a circular surface. However, the shape of the top surface 411 is not limited thereto. In some embodiments, depending on the specific application scenario,

[0384] In this embodiment, the number of blades 42 is 9. However, the number of blades 42 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of blades 42 can be (but not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11, or more.

[0385] The inner surface of the fan blade 4 is raised to form a limiting ring 433 . The limiting ring 433 is located between the first cavity 431 and the second cavity 432 , and is in contact with the fan motor 3 .

[0386] In this embodiment, a limiting ring 433 is provided on the inner surface of the hub 41 , and the limiting ring 433 divides the internal cavity 43 of the hub 41 into a first cavity 431 and a second cavity 432 , and the first cavity 431 and the second cavity 432 are interconnected through the limiting ring 433 .

[0387] The limiting ring 433 abuts against the magnetic ring 33 of the fan motor 3. In some embodiments, when the magnetic ring 33 of the fan motor 3 is sleeved with a metal ring 34, the limiting ring 433 abuts against one end of the metal ring 34. The abutment between the limiting ring 433 and the magnetic ring 33 or the metal ring 34 allows the limiting ring 433 to limit the magnetic ring 33 or the metal ring 34, facilitating assembly of the magnetic ring 33 or the metal ring 34 and preventing the magnetic ring 33 or the metal ring 34 from excessively extending into the internal cavity 43 of the hub 41, which could cause the bottom surface 412 of the hub 41 to contact the connector 2.

[0388] A plurality of reinforcing ribs 435 are provided in the second cavity 432 , and the plurality of reinforcing ribs 435 are arranged around the connecting sleeve 434 , and one end of each of the plurality of reinforcing ribs 435 is connected to the connecting sleeve 434 , and the other end of each reinforcing rib 435 is connected to the inner surface of the second cavity 432 .

[0389] The provision of the reinforcing ribs 435 can enhance the physical strength of the connecting sleeve 434. At the same time, the provision of the reinforcing ribs 435 can disperse the force exerted on the fan blades 4 to the hub 41, thereby preventing the connecting sleeve 434 from being subjected to a single point of force and improving the rotational stability of the fan blades 4.

[0390] Each of the multiple blades 42 includes a first end 421 and a second end 422 opposite to the first end 421, and the length of the first end 421 is greater than the length of the second end 422. The first end 421 is located adjacent to the top surface 411 of the hub 41, and the second end 422 is located adjacent to the bottom surface 412 of the hub 41. In each blade 42, the first end 421 is used to push the airflow into the fan blade 4 when the fan blade 4 rotates. The longer length of the first end 421 is conducive to pushing the airflow. The second end 422 is located at the end of the airflow direction. The reduction in the length of the second end 422 is conducive to reducing the size of the space for airflow flow, compressing the airflow, and increasing the initial kinetic energy of the airflow, thereby improving the air outlet efficiency of the fan module.

[0391] Each blade 42 has a blade edge 423. The thickness of each blade 42 gradually increases from the first end 421 to the blade edge 423 and gradually decreases from the blade edge 423 to the second end 422. The varying thicknesses of the blades 42 at different locations result in each blade 42 being thinner at both ends and thicker in the middle. This structure enhances the airflow-cutting capabilities of the blades 42 at both ends and reduces air resistance at both ends. The increased thickness in the middle enhances the physical strength of the blades 42. Furthermore, the increased thickness of the blades 42 reduces the space between adjacent blades 42, thereby boosting the pressure of the airflow.

[0392] In this embodiment, the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 4 is 1.01-1.15. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 4 defines the gap between the housing 1 and the maximum diameter of the fan blades 4. When the fan blades 4 rotate, they generate centrifugal force on the airflow passing through the fan blades 4. Under the action of the centrifugal force, the airflow moves laterally and collides with the inner wall of the housing 1, generating turbulence, thereby affecting the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. Limiting the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 4 to between 1.01-1.15 reduces the gap between the fan blades 4 and the housing 1, reduces the travel of the lateral airflow under the action of centrifugal force, and limits the speed of the airflow when it contacts the inner edge of the housing 1 to a smaller preferred range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the shell 1 to the maximum diameter of the fan blades 4 is limited to between 1.01-1.15, within this ratio range, the distance between the fan blades 4 and the shell 1 is small, which can have an excellent interception effect on the return airflow in the fan blades 4, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blades 4, thereby improving the air intake efficiency of the fan module. The improvement of the air intake efficiency enables the overall air outlet efficiency of the fan module to be improved.

[0393] In some embodiments, the length ratio of the first end 421 to the second end 422 is in the range of 1.4-1.9. The airflow flowing through the fan flows from the first end 421 to the second end 422, and the direction of the first end 421 facing the second end 422 gradually decreases. This reduction process cooperates with the size change of the hub 31 to gradually reduce the space for the airflow to flow, gradually pressurize the convection, and increase the initial velocity of the airflow. However, due to the gap between the fan blades 4 and the housing 1, when the pressure of the airflow entering the first end 421 and flowing out of the second end 422 is obviously too high, since it is not a completely enclosed space, the airflow will flow back due to the excessive pressure. The backflow airflow will impact the intake airflow of the fan module to form a cyclone, reducing the air intake efficiency of the fan module. The length ratio of the first end 421 to the second end 422 is limited to 1.4-1.9. Within this ratio range, the airflow pressure flowing through the fan blades 4 is adjusted within the optimal range, minimizing the backflow problem caused by excessive air pressure. At the same time, within this ratio range, the first end 421 can most effectively intercept and utilize the return airflow that gradually overflows from the edge of the blade 42, minimizing the probability of the return airflow flowing out of the housing 1. The combination of these two functions allows the airflow entering the first end 421 and the airflow outflowing the end to approach the optimal value of 1:1, greatly improving the air output efficiency of the fan blade 4.

[0394] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination should not be limited to the combination listed in this embodiment.

[0395] Example 6

[0396] Please refer to Figures 54 and 55. Figure 54 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 55 is a schematic diagram of the decomposed structure of the fan module of this embodiment.

[0397] As shown in Figures 54 and 55, a fan module includes: a housing 1, a connector 2, a fan motor 3, and fan blades 4. The connector 2 is disposed within the housing 1, and the connector 2 and the housing 1 enclose multiple airflow channels, with one end of the connection abutting or spaced apart with a first bearing 35. The fan motor 3 is sleeved on the connector 2 and the first bearing 35, with one end of the fan motor 3's rotating shaft passing through the first bearing 35 and connected to the connector 2. The fan blades 4 are connected to the other end of the rotating shaft 31.

[0398] In the above embodiment, a connector 2 is provided in the housing 1, and a first bearing 35 is provided at the end of the connector 2 in contact with or at intervals, and the fan motor 3 is sleeved on the connector 2 and the first bearing 35. Since the first bearing 35 is made of metal, it has higher physical strength and can provide stronger support for the fan motor 3. At the same time, the support strength of the first bearing 35 is higher, which avoids the problem of the connector 2 being damaged and broken due to excessive force when the fan motor 3 rotates at high speed, thereby improving the service life of the fan module. At the same time, the provision of the first bearing 35 shortens the length of the connector 2. The shortened length shortens the torque of the connector 2 when it is subjected to force, and it bears a greater force from the fan motor 3, making the rotation of the fan motor 3 more stable and the air outlet efficiency higher.

[0399] In this embodiment, the housing 1 is cylindrical, and a cylindrical air cavity 11 is defined within the cylinder. However, the shape of the housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes.

[0400] In this embodiment, the housing 1 is provided with an air cavity 11 extending through its upper and lower surfaces. The air cavity 11 is cylindrical. However, the shape of the air cavity 11 is not limited thereto. Depending on the specific application scenario, in some embodiments, the air cavity 11 can be shaped like a star, a heart, a racetrack, or a polygon.

[0401] In some embodiments, a trumpet-shaped air guide cover or an air guide cover with a necked opening is provided in the housing 1 .

[0402] In some embodiments, the fan motor 3 includes: a coil 32 and a magnetic ring 33, the magnetic ring 33 is sleeved on the connecting member 2 and the first bearing 35, the fan motor 3 is sleeved on the magnetic ring 33, and the magnetic ring 33 is sleeved on the coil 32. In this embodiment, a accommodating cavity is provided on the fan blades 4, and the inner surface of the accommodating cavity is sleeved on the coil 32. When the fan motor 3 rotates, the coil 32 drives the magnetic ring 33 to rotate, and the magnetic ring 33 then drives the fan blades 4 to rotate. In this process, the rotating shaft 31 no longer provides driving force for the fan blades 4 like a traditional motor, but plays a role in stabilizing and fixing the fan blades 4. This rotation method, since the steering force area of ​​the magnetic ring 33 acting on the fan blades 4 is larger and the inertia moment of the fan blades 4 is smaller, can enable the fan blades 4 to rotate at high speed and stably.

[0403] Please refer to FIG. 56 , which is a cross-sectional diagram of the fan module according to this embodiment.

[0404] As shown in FIG56 , in some embodiments, the fan motor 3 includes a coil 32, a magnetic ring 33, and a motor housing 34. The coil 32 is mounted on the connector 2 and the first bearing 35, the magnetic ring 33 is mounted on the coil 32, and the motor housing 34 is mounted on the magnetic ring 33. The motor housing 34 is fixedly connected to the rotating shaft 31 so that the fan housing 1 drives the rotating shaft 31 to rotate. In this embodiment, the coil 32 drives the magnetic ring 33 to rotate, and the rotation of the magnetic ring 33 drives the motor housing 34 to rotate synchronously. The motor housing 34 then drives the rotating shaft 31 connected to it to rotate. This connection and drive method, because the steering force applied to the magnetic ring 33 is larger, the magnetic coupling connection between the magnetic ring 33 and the coil 32 can achieve faster and more stable rotation of the magnetic ring 33, thereby achieving faster and more stable rotation of the fan motor 3. At the same time, due to the connection between the motor housing 34 and the rotating shaft 31, the rotational torque between the rotating shaft 31 and the fan blades 4 is smaller, and the rotational inertia resistance of the fan blades 4 is also smaller. When rotating at high speed, the fan blades 4 are less likely to shake and resonate, making the rotation of the fan blades 4 more stable and the speed higher.

[0405] The coil 32 is interference-fitted with the connector 2, the magnetic ring 33 is magnetically coupled to the coil 32, and the motor housing 34 is interference-fitted with the rotating shaft 31. During the rotation of the magnetic ring 33 and coil 32, the magnetic ring 33 rotates in a suspended state, which reduces the physical friction experienced by conventional motors, thereby further increasing the speed of the fan motor 3.

[0406] In some embodiments, the connection method between the coil 32 and the connector 2 is not limited to interference fit. Depending on the specific application scenario, the connection method between the coil 32 and the connector 2 can also be (but not limited to): gluing, welding, riveting, screw connection and other fixing methods.

[0407] In some embodiments, the connection between the motor housing 34 and the rotating shaft 31 is not limited to interference fit. Depending on the specific application scenario, the connection between the motor housing 34 and the rotating shaft 31 can also be (but not limited to): gluing, welding, riveting, screw connection, etc.

[0408] The connecting member 2 includes: a connecting ring 22 and a plurality of connecting plates 21. The plurality of connecting plates 21 are arranged around the connecting ring 22. One end of each of the plurality of connecting plates 21 is connected to the inner surface of the shell 1, and the other end of each connecting plate 21 is connected to the connecting ring 22. Two adjacent connecting plates 21 in the plurality of connecting plates 21 are enclosed to form an air duct.

[0409] The arrangement of multiple connecting plates 21 enables the connecting ring 22 to be suspended in the housing 1 . Every two connecting plates 21 among the multiple connecting plates 21 enclose an air duct, allowing the airflow pushed by the fan assembly to flow through the air duct.

[0410] In this embodiment, the number of connecting plates 21 is 7. However, the number of connecting plates 21 is not limited thereto, and in some embodiments, the number of connecting plates 21 can be 2, 3, 4, 5, 6, 8, or more, depending on the specific application scenario.

[0411] In some embodiments, the connecting member 2 is a plate disposed inside the housing 1 . The shape of the plate is the same as the shape of the internal cavity of the housing 1 , and a plurality of holes for airflow are opened on the plate.

[0412] The connector 2 and the housing 1 are manufactured by an integral molding process. However, the manufacturing process of the connector 2 and the housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connector 2 and the housing 1 can be separately machined and molded, and then assembled and connected by gluing, snapping, riveting, or screwing.

[0413] Please refer to Figures 57 and 58. Figure 57 is a schematic diagram of the three-dimensional structure of the shell of this embodiment; Figure 58 is a schematic diagram of the structure of the connection between the shell and the rotating shaft of this embodiment.

[0414] As shown in Figures 57 and 58 , the connector 2 further includes a connecting post 23. The connecting post 23 is connected to the side of the connecting ring 22 facing the fan motor 3. The connecting post 23 abuts against or is spaced apart from the first bearing 35. The bearing passes through the first bearing 35 and is connected to the connecting post 23. The fan motor 3 is sleeved on the connecting post 23 and the first bearing 35.

[0415] The connecting post 23 is configured in a truncated cone shape, which can stop the coil 32 and facilitate the installation and fixation of the coil 32. However, the shape of the connecting post 23 is not limited to this. Depending on the specific application scenario, in some embodiments, the connecting post 23 can be a stepped structure composed of two connected cylinders, or a prism or cylindrical structure.

[0416] In some embodiments, the connector 2 only includes: a connecting column 23 and multiple connecting plates 21, the multiple connecting plates 21 are arranged around the connecting column 23, and one end of the multiple connecting plates 21 is connected to the inner surface of the shell 1 and the other end is connected to the connecting column 23.

[0417] The connecting post 23 and the connecting ring 22 are manufactured by an integral casting process. However, the manufacturing method of the connecting post 23 and the connecting ring 22 is not limited to this. In some embodiments, the connecting post 23 and the connecting ring 22 are manufactured separately and then connected by (but not limited to) screw connection, clamping, riveting, adhesive connection, etc.

[0418] In some embodiments, the end of each connecting plate 21 facing the fan motor 3 is bent and extended toward the fan motor 3 to form an air guide plate 24, and the bending direction of the air guide plate 24 is opposite to the rotation direction of the fan assembly.

[0419] Specifically, each of the plurality of connecting plates 21 is formed with an air guide plate 24 at the end facing the fan motor 3. The curvature of the air guide plate 24 is opposite to the rotational direction of the fan blades 4. In this embodiment, the curvature of the air guide plate 24 is opposite to the rotational direction of the fan blades 4, which means that the curvature of the air guide plate 24 is opposite to the rotational direction of the fan blades 4. This is not limited to the specific embodiment in which the curvature of the air guide plate 24 is 180 degrees to the rotational direction of the fan blades 4. In some embodiments, the curvature of the air guide plate 24 at an obtuse angle to the rotational direction of the fan blades 4 is also within the scope of the definition of "opposite" in this embodiment.

[0420] The bending direction of the air guide plate 24 is opposite to the rotation direction of the fan blades 4. When the fan blades 4 rotate, they will drive the airflow to rotate in the same direction. At this time, the bending direction of the air guide plate 24 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the curved part of the air guide plate 24. Due to the opposite directions, the angle between the airflow and the curved part of the air guide plate 24 is greater than 90 degrees. The airflow contacts the air guide plate 24 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the air guide plate 24. During the contact process at a larger angle, the air guide plate 24 has an obvious guiding effect on the airflow, with small energy loss, which greatly improves the air outlet efficiency.

[0421] The air guide plate 24 is disposed between the fan assembly and the housing 1 , and is connected to the inner surface of the housing 1 , with a gap being provided between the air guide plate 24 and the fan assembly.

[0422] Specifically, the air guide plate 24 is disposed between the fan motor 3 and the housing 1 , and a gap is provided between the air guide plate 24 and the fan motor 3 .

[0423] In some embodiments, the air guide plate 24 is disposed between the hub of the fan blade 4 and the housing 1 , and a gap is provided between the air guide plate 24 and the hub.

[0424] Air deflector 24 is disposed between fan blades 4 and housing 1, with a gap between air deflector 24 and fan blades 4. Due to the gap between air deflector 24 and fan blades 4, after airflow contacts air deflector 24, part of the airflow flows along the guide of air deflector 24 toward the air outlet, while the remaining airflow flows through the gap between air deflector 24 and fan blades 4 to the next air deflector 24. The gap between air deflector 24 and fan blades 4 provides a channel for air pressure balance between air deflectors 24, avoiding the problem of inconsistent air pressure on both sides of air deflector 24 due to the complete closure of air deflector 24, which in turn affects the air output efficiency of the fan module.

[0425] In some embodiments, the connecting ring 22 includes: a connecting outer ring 221 and a connecting inner ring 222, the connecting inner ring 222 is arranged inside the connecting outer ring 221, the connecting outer ring 221 is connected to multiple connecting plates 21, one end of the connecting column 23 is connected to the connecting inner ring 222, and the other end of the connecting column 23 extends out of the connecting outer ring 221 and is sleeved and connected to the fan motor 3.

[0426] The thickness of the connecting outer ring 221 is greater than the thickness of the connecting inner ring 222, so that when the connecting inner ring 222 is set in the connecting outer ring 221, there is still empty space in the connecting outer ring 221. The empty space can be used to set the assembly base, thereby improving the space utilization of the fan module.

[0427] The connecting post 23 has a connecting hole 25 extending through it. The connecting hole 25 communicates with the connecting inner ring 222. A second bearing 36 is disposed within the connecting inner ring 222 and the connecting hole 25. The rotating shaft 31 passes through the connecting hole 25 and is connected to the second bearing 36. The rotating shaft 31 is inserted into and out of the first bearing 35 and the second bearing 36. A retaining groove 311 is defined at the end of the rotating shaft 31 that extends beyond the second bearing 36. A retaining spring 37 is connected to the retaining groove 311.

[0428] The arrangement of the first bearing 35 and the second bearing 36 allows for smoother rotation of the rotating shaft 31. Furthermore, the arrangement of two rotating shafts 31 stabilizes the linear rotation of the rotating shaft 31, enabling faster rotation of the fan motor 3. The arrangement of the retaining groove 311 and the retaining spring 37 prevents the rotating shaft 31 from falling out of the first bearing 35 and the second bearing 36, thereby enhancing the stability and reliability of the connection of the rotating shaft 31.

[0429] The end of the connecting outer ring 221 facing away from the fan motor 3 is snap-connected with a PCB circuit board 6. Snap-connecting the PCB circuit board 6 to the connecting outer ring 221 and arranging the PCB circuit board 6 on the connecting outer ring 221 can prevent the PCB circuit board 6 from leaking out of the fan module and obstructing the airflow within the fan module. Therefore, the arrangement of the PCB circuit board 6 reduces the wind resistance inside the fan module and improves the air outlet efficiency of the fan module. The snap-connection between the PCB circuit board 6 and the connecting outer ring 221 facilitates the disassembly and replacement of the PCB circuit board 6, thereby improving maintenance efficiency. At the same time, the PCB circuit board 6 can also serve as a dust cover above the fan motor 3 or the rotating shaft 31 and the second bearing 36 to prevent external dust from entering the above-mentioned components and affecting the normal use of the above-mentioned components.

[0430] Please refer to Figure 59, which is a schematic diagram of the connection structure between the shell and the PCB circuit board in this embodiment.

[0431] As shown in Figure 59, a clamping plate 221a and a support plate 221b are provided at the end of the connecting outer ring 221 facing away from the fan motor 3. The support plate 221b overlaps with the PCB circuit board 6, and the clamping plate 221a is clamped and connected with the PCB circuit board 6. The support plate 221b and the clamping plate 221a are alternately arranged.

[0432] The support plates 221 b and the clamping plates 221 a are alternately arranged so that the support plates 221 b and the clamping plates 221 a have movable space, which facilitates the assembly of the PCB circuit board 6 .

[0433] In this embodiment, the number of support plates 221b is 3. However, the number of support plates 221b is not limited thereto, and depending on the specific application scenario, in some embodiments, the number of support plates 221b can be (but not limited to): 2, 4, 5 or more.

[0434] In this embodiment, the number of the clamping plates 221a is 3. However, the number of the clamping plates 221a is not limited thereto, and depending on the specific application scenario, in some embodiments, the number of the clamping plates 221a can be (but not limited to): 2, 4, 5 or more.

[0435] In some embodiments, a claw 221c is provided on the clamping plate 221a, and the support plate 221b forms a support edge 221d by changing the thickness. The position height of the support edge 221d is lower than the position height of the claw 221c. The claw 221c and the support edge 221d form a clamping space, and the PCB circuit board 6 is arranged in the clamping space.

[0436] The annular clamping space constructed by the clamping claws 221c and the supporting edge 221d can clamp the PCB circuit board 6, preventing the PCB circuit board 6 from shaking or vibrating when the fan motor 3 rotates, thereby improving the stability of the fan module and reducing the noise of the fan module.

[0437] In some embodiments, the clamping device on the clamping plate 221a is not limited to the claw 221c. Depending on the specific application scenario, the clamping plate 221a can be provided with (but not limited to): circular, elliptical, and runway-shaped protrusions serving as the clamping device.

[0438] In some embodiments, the manufacturing device on the support plate 221b is not limited to the support edge 221d formed by thickness change. Depending on the specific application scenario, the support plate 221b can be provided with (not limited to): circular, elliptical, and runway-shaped protrusions acting as support devices.

[0439] In this embodiment, the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 4 is 1.01-1.15. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 4 defines the gap between the housing 1 and the maximum diameter of the fan blades 4. When the fan blades 4 rotate, they generate centrifugal force on the airflow passing through the fan blades 4. Under the action of the centrifugal force, the airflow moves laterally and collides with the inner wall of the housing 1, generating turbulence, thereby affecting the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. Limiting the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 4 to between 1.01-1.15 reduces the gap between the fan blades 4 and the housing 1, reduces the travel of the lateral airflow under the action of centrifugal force, and limits the speed of the airflow when it contacts the inner edge of the housing 1 to a smaller preferred range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the shell 1 to the maximum diameter of the fan blades 4 is limited to between 1.01-1.15, within this ratio range, the distance between the fan blades 4 and the shell 1 is small, which can have an excellent interception effect on the return airflow in the fan blades 4, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blades 4, thereby improving the air intake efficiency of the fan module. The improvement of the air intake efficiency enables the overall air outlet efficiency of the fan module to be improved.

[0440] In some embodiments, a flexible sleeve 5 is provided over the housing 1, with annular protrusions 51 and dot-shaped protrusions 52 alternatingly arranged on its exterior. The provision of the flexible sleeve 5 can increase the friction between the fan module and external objects or other mating structures, thereby enhancing the connection stability of the fan module. Furthermore, the provision of the flexible sleeve 5 can effectively buffer the physical vibrations generated by the fan module during operation, making the fan module's rotation more stable and generating less noise.

[0441] The flexible sleeve 5 is provided with alternating annular protrusions 51 and dot-shaped protrusions 52 on its exterior. Specifically, in some embodiments, the annular protrusions 51 are provided at both ends of the flexible sleeve 5, while the dot-shaped protrusions 52 are provided between the two annular protrusions 51. Alternatively, the annular protrusions 51 are provided at both ends and in the middle of the flexible sleeve 5, while the dot-shaped protrusions 52 are provided between two adjacent annular protrusions 51. However, the alternating arrangement of the annular protrusions 51 and dot-shaped protrusions 52 is not limited to this. The number of annular protrusions 51 can be 4, 5, 6, or more. The dot-shaped protrusions 52 can also be provided at one or both ends of the flexible sleeve 5.

[0442] The alternating arrangement of the annular protrusions 51 and the dot-shaped protrusions 52 provides the annular protrusions 51 and the dot-shaped protrusions 52 with a larger deformation space, facilitating the assembly of the fan module. At the same time, the larger deformation space can improve the buffering performance of the flexible sleeve 5.

[0443] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination should not be limited to the combination listed in this embodiment.

[0444] Example 7

[0445] Please refer to Figures 60 and 61. Figure 60 is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 61 is a schematic diagram of the position structure of the handle and fan assembly of this embodiment.

[0446] As shown in Figures 60 and 61, a portable fan includes: a holding portion 1; a blowing portion 2, the blowing portion 2 is connected to one end of the holding portion 1, and an air inlet 21 and an air outlet 22 are provided on the blowing portion 2; a fan assembly 3, the fan assembly 3 is arranged in the blowing portion 2, and is used to push the air flow from the air inlet 21 to the air outlet 22; the holding portion 1 is distributed with a first end 11 along the direction from the air inlet 21 to the air outlet 22, and a second end 12 opposite to the first end 11, and the fan assembly 3 is arranged in a space defined by extension lines L1 and L2 of the first end 11 and the second end 12 toward the blowing portion 2.

[0447] In this embodiment, the grip portion 1 is constructed as a cuboid, and the side edges of the grip portion 1 are smoothly rounded at the joints. However, the overall structure of the grip portion 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the grip portion 1 can be constructed as a cylinder, a polygonal prism, a cube, a cartoon figure, or other shapes (including but not limited to).

[0448] In this embodiment, the blowing portion 2 is configured in a cylindrical shape. However, the configuration of the blowing portion 2 is not limited thereto. Depending on the specific application scenario, in some embodiments, the blowing portion 2 can be configured in (but not limited to) a prism, barrel, polygon, or racetrack shape.

[0449] Please refer to Figure 62, which is a schematic structural diagram of the fan assembly of this embodiment.

[0450] As shown in Figure 62, the fan assembly 3 in this embodiment includes: fan blades 32 and a fan motor 31. A connecting ring is provided inside the blowing portion 2 for fixing the fan assembly 3. The fan blades 32 and the fan motor 31 are integrated in a spatial structure reuse manner. However, the structure of the fan blades 32 and the fan motor 31 is not limited to this. In some embodiments, the fan blades 32 and the fan motor 31 can be a split structure, that is, the fan blades 32 and the fan motor 31 are connected only by a rotating shaft.

[0451] In some embodiments, the fan assembly 3 further includes a fan housing 33, within which the fan blades 32 and the fan motor 31 are disposed. The fan housing 33 encapsulates the fan blades 32 and the fan motor 31 into a standardized assembly. In this embodiment, the length of the fan assembly 3 refers to the height of the cylindrical structure of the fan housing 33, or the distance from the top of the fan blades 32 to the rear end of the fan motor 31.

[0452] In some embodiments, the fan assembly 3 further includes a flexible protective cover 34, which is mounted over the fan housing 33 and serves to stabilize the connection between the fan assembly 3 and the blowing unit 2. The flexible protective cover 34 also provides a cushioning effect, reducing vibration and noise of the portable fan. In this embodiment, the length of the fan assembly 3 refers to the height of the cylindrical structure of the flexible protective cover 34.

[0453] In some embodiments, the surface of the flexible protective cover 34 is provided with dot-shaped protrusions 341 or annular protrusions (not shown). In some embodiments, the dot-shaped protrusions 341 and the annular protrusions are arranged alternately. The dot-shaped protrusions 341 and / or the annular protrusions can enhance the cushioning capacity of the flexible protective cover 34, further reducing vibration and noise of the portable fan, while also facilitating assembly of the fan assembly 3 into the blowing unit 2.

[0454] In this embodiment, the first end 11 and the second end 12 actually represent the length of the three attribute parameters of the handle 1. Structurally, the overall length of the fan assembly 3 is no greater than the length of the handle 1; positionally, the fan assembly 3 is positioned within the range defined by the vertical extension of the first end 11 and the second end 12.

[0455] In the above embodiment, the fan assembly 3 of the portable fan is arranged in the blowing part 2, and the fan assembly 3 is limited to be placed in the space of the extension line member of the first end 11 and the second end 12 of the holding part 1. That is, the length of the fan assembly 3 in the blowing direction is limited to be no greater than the length of the holding part 1 in the blowing direction. This construction method can keep the center of gravity of the fan assembly 3 and the holding part 1 consistent, so that the portable fan has greater stability when placed. Secondly, the portable fan will generate a recoil force during the blowing process. When the center of gravity of the fan assembly 3 and the holding part 1 are inconsistent, the portable fan will turn under the action of the recoil force. Therefore, the relative position relationship between the fan assembly 3 and the holding part 1 in this embodiment can also prevent the portable fan from deflecting when blowing.

[0456] Again, when the speed of the fan assembly 3 is high, for example, when the fan motor 31 of the fan assembly 3 is a three-phase motor, the high speed will generate high-frequency vibrations, which will in turn cause the entire portable fan to vibrate, and in certain scenarios may even cause the portable fan to resonate. In this embodiment, the fan assembly 3 is confined between the first end and the second end of the gripping portion 1, so that the high-frequency vibrations generated by the fan assembly 3 cannot be directly transmitted to the gripping portion 1, but are instead transmitted from the fan assembly 3 to the blowing portion 2, and then from the blowing portion 2 to the gripping portion 1. The vibration wave will attenuate during this transmission process, greatly reducing the amplitude and energy of the vibration of the gripping portion 1. When the energy attenuation is large, the conditions for resonance will be broken, the resonance risk of the portable fan will be reduced, and the comfort of use of the portable fan will be improved. The use of a three-phase motor can make the speed of the fan motor 31 higher, the amount of air blown out larger, and the cooling effect more obvious.

[0457] However, the type of motor used by the fan motor 31 is not limited to a three-phase motor. In some embodiments, the fan motor 31 can also use a two-phase motor.

[0458] Please refer to Figure 63, which is a schematic diagram of the overall structure of the portable fan of this embodiment.

[0459] As shown in Figure 63, in some embodiments, the blowing part 2 includes: a connecting tube 23, the outer surface of the connecting tube 23 is smooth, the connecting tube 23 is connected to one end of the holding part 1, and the fan assembly 3 is arranged in the connecting tube 23.

[0460] When the fan assembly 3 is in operation, the air near the connecting tube 23 will flow toward the air inlet 21 as negative pressure is formed at the air inlet 21. The smooth outer surface of the connecting tube 23 allows for smoother air flow and prevents the formation of vortices during the flow process, which would affect the air intake of the portable fan. Therefore, the blowing efficiency of the portable fan can be improved.

[0461] The fan assembly 3 is fixed in the connecting tube 23. For example, the fan assembly 3 is fixed by a connecting ring provided in a hollow portion of the connecting tube 23, or the fan assembly 3 is fixed by a connecting rod provided inside the fan assembly 3.

[0462] The connecting tube 23 can be directly connected to the holding portion 1 by means of (but not limited to): screws, gluing, clamping, welding or riveting.

[0463] In some embodiments, the connection between the connecting tube 23 and the grip portion 1 is achieved through a connector 15. One end of the connector 15 is connected to the grip portion 1, and the other end of the connector 15 is connected to the connecting tube 23. The connection between the connecting tube 23 and the connector 15 may be achieved by (but not limited to) screws, adhesive bonding, clamping, welding, or riveting. Whether the connecting tube 23 is directly connected to the grip portion 1 or connected through the connector 15, both connections constitute a connection between the connecting tube 23 and the grip portion 1.

[0464] In some embodiments, along the direction from the air inlet 21 to the air outlet 22, the ratio of the distance from the first end 11 to the second end 12 to the length of the fan assembly 3 is: 1.05-1.35. Within this ratio value, the overall shape and blowing efficiency of the portable fan are optimized. When the ratio of the two is greater than 1.35, the ratio of the fan assembly 3 to the holding portion 1 begins to gradually become unbalanced, and the wind-driving ability of the overly small fan assembly 3 decreases. When the ratio of the two is less than 1.05, the ratio of the fan assembly 3 to the holding portion 1 gradually becomes unbalanced. Since the mass distribution of the fan assembly 3 itself is uneven, when the fan assembly 3 gradually becomes larger, its center of gravity distribution will shift, resulting in insufficient stability of the portable fan. An overly large fan assembly 3 will also cause the entire portable fan to become "top-heavy" and lose its balance ability.

[0465] In some embodiments, a counterweight is provided within the handle 1 to stabilize the portable fan when placed. Typically, the counterweight is provided by a battery 14, but the object is not limited thereto. Depending on the specific application scenario, in some embodiments, a counterweight made of a metal such as lead, copper, or iron, or a compound or mixture of such metals, can be used. The combination of the counterweight and the battery 14 can also serve as the counterweight for the handle 1.

[0466] The provision of the counterweight can further enhance the placement stability of the grip portion 1 and lower the center of gravity of the portable fan, making it less likely to fall over.

[0467] The blowing portion 2 is arranged from the first end 11 to the second end 12, and the length of the blowing portion 2 is greater than the distance from the first end 11 to the second end 12. The fan assembly 3 is arranged in the blowing portion 2, and the length of the blowing portion 2 is greater than the distance from the first end 11 to the second end 12, that is, the length of the blowing portion 2 is greater than the length of the holding portion 1. When the length of the blowing portion 2 is greater than the length of the holding portion 1, the airflow has a certain beam space when entering the blowing portion 2 and when flowing out of the blowing portion 2, which can mix the airflow entering the fan assembly 3 and make it have a uniform flow direction and flow rate; similarly, the airflow flowing out of the blowing portion 2 can also be mixed to make it have a uniform flow direction and flow rate, thereby improving the overall blowing efficiency of the portable fan.

[0468] Furthermore, when the fan assembly 3 is operating, a negative pressure zone forms around the air inlet 21, and a positive pressure zone forms around the air outlet 22. The negative pressure zone at the air inlet 21 causes the surrounding airflow to converge toward the air inlet 21. If the blowing portion 2 is too short, such that the air inlet 21 is flush with or within the grip 1, the grip 1 itself will become an obstruction to the flow of surrounding airflow, causing turbulence or vortices in the flowing air and reducing air intake efficiency. However, when the blowing portion 2 is longer than the grip 1, a gap is created between the air inlet 21 and the grip 1, and the grip 1 no longer obstructs the flow of surrounding air toward the air inlet 21, significantly improving the air intake efficiency of the portable fan. The positive pressure wind zone formed by the air outlet 22 causes the airflow around the air outlet 22 to flow in all directions. If the blowing section 2 is too short, so that the air outlet 22 is flush with or inside the handle 1, the airflow from the air outlet 22 will flow along the handle 1 due to the wall effect, reducing the air outlet efficiency. Alternatively, the airflow from the air outlet 22 may collide with the handle 1 and generate a cyclone, which also reduces the air outlet efficiency. However, when the blowing section 2 is longer than the handle 1, there is a gap between the air outlet 22 and the handle 1, which can prevent the airflow from colliding with the handle 1 or generating the wall effect, greatly improving the air outlet efficiency of the portable fan.

[0469] In some embodiments, the ratio of the length of the blowing portion 2 to the distance from the first end 11 to the second end 12 is: 1.1-1.5. Within this ratio, the air intake and air outlet efficiency of the portable fan reaches the optimal level. When the ratio of the two is greater than 1.5, the proportions of the blowing portion 2 and the holding portion 1 are out of balance. The excessively long air outlet makes the distance from the air inlet 21 to the fan assembly 3 too long, and the air intake mixed flow space is too large. The excessively long air outlet increases the contact area between the airflow and the inner wall space of the blowing portion 2, resulting in large air intake noise. The excessively long air outlet also makes the distance from the fan assembly 3 to the air outlet 22 too long, which also leads to large air outlet noise and low air outlet efficiency. When the ratio of the two is less than 1.1, the excessively short air outlet makes the distance from the air inlet 21 to the fan assembly 3 too short, and the airflow entering therein cannot be well beamed, causing more turbulence in the airflow entering the fan blades 32, affecting the efficiency of the fan blades 32. An excessively short air outlet portion causes the distance between the air outlet 22 and the fan assembly 3 to be too short, thereby causing the airflow blown out of the air outlet 22 to be too dispersed and poorly directional.

[0470] The distance between the first end 11 and the second end 12 is greater than the thickness of the grip 1 in the direction perpendicular to the first end 11 and the second end 12. In other words, from the perspective of "length, width, and height," the grip 1 is longer than its width. This design, combined with the barrel-shaped blower 2, creates a more harmonious overall appearance for the portable fan.

[0471] Please refer to Figure 64, which is a schematic diagram of the exploded view of the assembly tube and fan assembly of this embodiment.

[0472] As shown in Figure 64, in some embodiments, the blowing unit 2 further includes an assembly cylinder 24, which is disposed in the connecting cylinder 23, and the fan assembly 3 is disposed in the connecting cylinder 23. The assembly cylinder 24 is disposed in the connecting cylinder 23, and the assembly cylinder 24 is connected to the fan assembly 3.

[0473] In some embodiments, the assembly tube 24 and the connecting tube 23 are made of different materials. For example, the connecting tube 23 is made of metal, while the assembly tube 24 is made of plastic. The material of the assembly tube 24 is more plastic. Therefore, manufacturing the assembly tube 24 and the connecting tube 23 separately can greatly improve the assembly efficiency and external aesthetics of the portable fan. This ensures that the outer surface of the connecting tube 23 is smooth and easy to grip.

[0474] However, the relationship between the assembly cylinder 24 and the connecting cylinder 23 is not limited to this. Depending on the specific application scenario, the assembly cylinder 24 and the connecting cylinder 23 can be made of the same material through integrated processing and manufacturing technology. In this embodiment, the assembly cylinder 24 and the connecting cylinder 23 should be distinguished based on the function of the overall component, rather than by whether the component is independent.

[0475] Please refer to Figures 65-8, Figure 65 is a structural schematic diagram of the assembly tube of this embodiment; Figure 66 is a structural schematic diagram of the connecting tube of this embodiment; Figure 67 is a structural schematic diagram of the air inlet ring of this embodiment.

[0476] As shown in Figure 65-8, in some embodiments, the blowing part 2 also includes: an air inlet tube 26 and an air outlet tube 25, the air inlet 21 is opened on the air inlet tube 26, and the air outlet 22 is opened on the air outlet tube 25, and the air inlet tube 26 and the air outlet tube 25 are respectively connected to the two ends of the assembly tube 24 by snap-connection.

[0477] The air inlet tube 26 and the air outlet tube 25 are respectively arranged at both ends of the assembly tube 24, which can clamp the connecting tube 23 to prevent the assembly tube 24 from falling from the connecting tube 23. The air inlet tube 26 and the air outlet tube 25 are fixed by a clamping method, which facilitates the assembly and disassembly of the air inlet tube 26 and the air outlet tube 25.

[0478] The surface of the air inlet duct 26 is raised to form multiple connecting ridges 261a. Two adjacent connecting ridges 261a are connected by a first connecting spring 261b. A first latch 261c is provided on the side of the first connecting spring 261b facing the connecting tube 23. A first latch 241 is provided on the surface of the end of the assembly tube 24 that connects to the air inlet duct 26, which engages with the first latch 261c. The provision of the connecting ridges 261a reduces the overall volume of the air inlet duct 26, requiring less material to manufacture. The space between the two connecting ridges 261a can also be used to position the first latch 261c, allowing the first latch 261c to deform under pressure. This method cleverly utilizes the surface space of the air inlet duct 26, making the connection between the air inlet duct 26 and the assembly tube 24 more ingenious and improving space utilization.

[0479] The surface of the air outlet cylinder 25 facing the connecting cylinder 23 is indented to form a plurality of first slots 251. A plurality of first openings 242 are correspondingly provided on the end of the assembly cylinder 24 facing the air outlet cylinder 25. A second connecting spring 243 is provided in each of the plurality of first openings 242. A second connecting spring 243 is provided on the side facing the fan assembly 3 to cooperate with the first slots 251. Similarly, the connection method between the assembly cylinder 24 and the air outlet cylinder 25 cleverly defines a first opening 242 on the surface of the assembly cylinder 24 and a second connecting spring 243 at the position of the first opening 242. This allows the assembly cylinder 24 to be connected to the air outlet cylinder 25 without providing a protruding structure, rationally utilizing the spatial structure and improving the space utilization rate of the assembly.

[0480] It should be pointed out that the connection method between the air inlet duct 26, the air outlet duct 25 and the assembly tube 24 is not limited to this. Depending on the specific application scenario, the connection method between the air inlet duct 26, the air outlet duct 25 and the assembly tube 24 can be (not limited to): gluing, screw connection, riveting, etc.

[0481] In some embodiments, the assembly cylinder 24 and the air inlet cylinder 26 or the air outlet cylinder 25 can be manufactured using an integrated manufacturing technology.

[0482] In some embodiments, the length of the first inner surface 262b at the end of the air inlet tube 26 facing away from the fan assembly 3 is shorter than the length of the first outer surface 262a, and a smooth transition is formed between the first inner surface 262b and the first outer surface 262a, forming a first curved edge 262c. Specifically, the outward extension of the first inner surface 262b is shorter than the outward extension of the first outer surface 262a. Consequently, a length difference forms between the ends of the first inner surface 262b and the first outer surface 262a. This length difference is connected by the first curved edge 262c, forming a smooth edge at the edge of the air inlet 21 that resembles a "bell mouth." The first curved edge 262c guides the airflow entering the air inlet 21 when air enters. Its smooth lines also prevent the airflow from making abrupt contact with the side edges, thereby improving the air intake efficiency of the portable fan and reducing wind noise.

[0483] In some embodiments, the second inner surface 254 at the end of the air outlet 25 facing away from the fan assembly 3 is shorter than the second outer surface 253, and a smooth transition forms between the second inner surface 254 and the second outer surface 253, forming a second curved edge 255. Specifically, the outward extension of the second inner surface 254 is shorter than the outward extension of the second outer surface 253. Consequently, a length difference forms between the ends of the second inner surface 254 and the second outer surface 253, which is connected by the second curved edge 255, forming a smooth edge resembling a "bell mouth" at the edge of the air outlet 22. The second curved edge 255 guides the outflowing air from the air outlet 22. The curved surface of the second curved edge 255 creates a Coanda effect, rapidly decompressing the high-speed airflow and increasing the airflow area in the blowing direction. The smooth curve of the second curved edge 255 also prevents abrupt contact between the airflow and the side edges, thereby improving the airflow efficiency of the portable fan, increasing the blowing area, and reducing wind noise.

[0484] In some embodiments, the air inlet duct 26 includes a connecting tube 261 and an air inlet ring 262. A plurality of connecting baffles 261a, a first connecting spring piece 261b, and a first latch 261c are provided on the connecting tube 261. The connecting tube 261 and the air inlet ring 262 are detachably connected. The maximum outer diameter of the connecting tube 261 is smaller than the inner diameter of the assembly tube 24, and the maximum outer diameter of the air inlet ring 262 is larger than the outer diameter of the connecting tube 23. The air inlet duct 26 can be disassembled into the connecting tube 261 and the air inlet ring 262. Although the assembly process is increased, the disassembled structure provides more adjustable space for the connection between the assembly tube 24 and the air inlet duct 26, providing greater fault tolerance during assembly.

[0485] In this embodiment, the first inner surface 262 b and the first outer surface 262 a are both provided on the air inlet ring 262 , and the first arcuate edge 262 c is also provided on the air inlet ring 262 .

[0486] Multiple connecting ribs 261a are provided with connecting screw holes 261d. The air inlet ring 262 is provided with threaded posts 262d at positions corresponding to the connecting screw holes 261d. The connecting screw holes 261d and the threaded posts 262d are connected by a first screw. A receiving groove 245 for receiving the first screw, the connecting screw holes 261d, and / or the threaded posts 262d is provided at one end of the assembly tube 24 connected to the air outlet tube 25. The receiving groove 245 can accommodate one or more of the first screw, the connecting screw holes 261d, or the threaded posts 262d. The screw connection allows for adjustment of the connection between the assembly tube 24 and the air inlet tube 26, providing greater fault tolerance during assembly. The connecting screw holes 261d are provided on the connecting rib 261a. Through the rational use of space, two connection methods are provided between the connecting rib 261a and the adjacent connecting rib 261a, thereby improving space utilization efficiency. The provision of the receiving groove 245 can prevent the first screw from protruding from the surface of the assembly tube 24 , thereby facilitating assembly.

[0487] The detachable connection method between the connecting tube 261 and the air inlet ring 262 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connecting tube 261 and the air inlet ring 262 can also be connected by snapping.

[0488] In some embodiments, the connecting tube 261 and the air inlet ring 262 can be manufactured by an integrated molding process.

[0489] The outer diameter of one end of the air outlet tube 25 connected to the assembly tube 24 is smaller than the inner diameter of the assembly tube 24 , and the maximum outer diameter of the end of the air outlet tube 25 facing away from the assembly tube 24 is larger than the outer diameter of the connecting tube 23 .

[0490] The outer diameters of the ends of the air outlet tube 25 and the connecting tube 261 connected to the assembly tube 24 are smaller than the inner diameter of the assembly tube 24, allowing the ends of the air outlet tube 25 and the connecting tube 261 connected to the assembly tube 24 to be inserted into the assembly tube 24. The maximum outer diameter of the end of the air outlet tube 25 facing away from the assembly tube 24 and the air inlet ring 262 are larger than the outer diameter of the connecting tube 23, which can clamp and limit the connection tube 23, preventing the assembly tube 24 and the connecting tube 23 from separating or shifting.

[0491] In some embodiments, a limit stop 246 is provided on the inner wall of the end of the assembly tube 24 where it connects to the air outlet tube 25. A positioning piece 252 is provided on the end of the air outlet tube 25 where it connects to the assembly tube 24. The limit stop 246 has a positioning slot 247 formed at a position corresponding to the positioning slot 252. The positioning piece 252 is provided in the direction in which at least one of the plurality of first slots 251 extends toward the assembly tube 24. The provision of the positioning piece 252 and the positioning slot 247 facilitates the snap-fit ​​assembly of the air outlet tube 25 and the assembly tube 24. Furthermore, the provision of the positioning piece 252 in the direction in which the first slot 251 extends toward the assembly tube 24 further facilitates the assembly of the first slot 251, the second connecting spring piece 243, and the second claw 244.

[0492] In some embodiments, a filter 27 is disposed between the connecting tube 23 and the air inlet ring 262. The filter 27 prevents debris, hair, or clothing from being drawn into the fan assembly 3, providing excellent protection. Placing the filter 27 between the connecting tube 23 and the air inlet ring 262 facilitates installation and replacement.

[0493] In some embodiments, the holding portion 1 includes: a shell 13, a battery 14 and a connector 15, the battery 14 is disposed in the shell 13, one end cover of the connector 15 is disposed at one end of the shell 13, and the other end is connected to the blowing portion 2.

[0494] The connection between the blowing section 2 and the gripping section 1 is achieved through the connector 15, making them independent of each other and facilitating the disassembly and maintenance of either one. Furthermore, since both the blowing section 2 and the gripping section 1 have established functional shapes, their specific shapes make them difficult to connect and secure. Therefore, the connector 15 is used to connect the two. The connector 15 can adaptably deform and dock according to the different shape requirements of the blowing section 2 and the gripping section 1, thereby improving the stability of the connection. For example, the end of the connector 15 connected to the blowing section 2 is provided with an arcuate groove, and the end of the connector 15 connected to the gripping section 1 is constructed to have a shape similar to the outer shape of the gripping section 1.

[0495] In some embodiments, the connector 15 is connected to the blowing unit 2 by screws, and the connector 15 is connected to the housing 13 by snap-fitting. However, the connection method between the connector 15 and the blowing unit 2 is not limited to this. Depending on the specific application scenario, in some embodiments, the connector 15 and the blowing unit 2 can be connected and fixed by (but not limited to) gluing, snap-fitting, riveting, welding, etc. The connector 15 and the housing 13 can be connected and fixed by (but not limited to) interference fit, screw connection, riveting, gluing, welding, etc.

[0496] The portable fan also includes: a first PCB circuit board 41, a second PCB circuit board 42 and a third PCB circuit board 43. The first PCB circuit board 41 is arranged in the housing 13, the second PCB circuit board 42 is arranged on the connecting member 15, and the third PCB circuit board 43 is arranged on the fan assembly 3. The first PCB circuit board 41 and the second PCB circuit board 42 are perpendicular to each other. The first PCB circuit board 41 and the second PCB circuit board 42 are connected by a first conductive member 46, and the second PCB circuit board 42 and the third PCB circuit board 43 are connected by a second conductive member 47. The stiffness of the first conductive member 46 is greater than or equal to the stiffness of the second conductive member 47.

[0497] The first PCB 41, second PCB 42, and third PCB 43 are positioned at different locations on the portable fan. This not only increases the mounting area for the various electronic components of the portable fan, but also effectively avoids the high electromagnetic interference caused by densely packed electronic components, effectively reducing the intensity of electronic interference between different PCBs. Furthermore, the different locations of the PCBs prevent excessive heat generation from the electronic components, thereby improving the heat dissipation efficiency of the portable fan.

[0498] The first conductive member 46 has a greater rigidity than the second conductive member 47, providing greater support for the second PCB 42 against the first PCB 41. Combined with the perpendicular arrangement of the first and second PCBs 41, the second PCB 42 supports the first PCB 41, preventing the first PCB 41 from moving into the housing 13 under external forces. The lower rigidity of the second conductive member 47 facilitates installation of the blower unit 2 and the connector 15.

[0499] In some embodiments, the first conductive member 46 is a motor component pin or a welded prismatic iron metal rod, and the second conductive member 47 is a wire, a flat cable, or a flexible circuit board.

[0500] The first PCB 41 is snap-fastened to the inner surface of the housing 13, the second PCB 42 is screwed to the connector 15, and the third PCB 43 is snap-fastened to the fan assembly 3. The snap-fastening connection of the first PCB 41 facilitates assembly and disassembly. The second PCB 42 is screwed to the connector 15. Since the second PCB 42 supports the first PCB 41, the more stable the second PCB 42 is installed, the greater the degree of positioning or support it provides for the first PCB 41. The third PCB 43 is snap-fastened to the fan assembly 3, facilitating assembly and disassembly and serving as a dust cover for the fan assembly 3.

[0501] In some embodiments, a first PCB 41 is connected to a first control button 44, and a second PCB 42 is connected to a second control button 45. The path of motion of the first control button 44 under load is perpendicular to the first PCB 41, while the path of motion of the second control button 45 under load is parallel to the second PCB 42. Because the first PCB 41 is secured by a snap-fit ​​connection and the second PCB 42 supports the first PCB 41, the first PCB 41 has a higher vertical load resistance, making it suitable for mounting the first control button 44, which moves in the vertical direction. The second PCB 42, however, is secured to the connector 15 by screws, resulting in a larger overhang area and weaker vertical load resistance. However, due to the screw fastening, it has greater anti-rotational properties. The path of motion of the second control button 45 under load is parallel to the second PCB 42, effectively resisting steering or deflection forces applied to the second control button 45 during use.

[0502] The term "plurality" in this embodiment refers to a number of two or more.

[0503] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination should not be limited to the combination listed in this embodiment.

Claims

1. A portable fan, wherein: include: Fan housing; A fan assembly, the fan assembly comprising: a fan motor and fan blades, the fan motor is arranged in the fan housing, the fan blades are arranged in the fan housing, and at least one connection position is arranged between the fan blades and the fan motor; and / or; The fan housing is made of plastic, and the fan blades are made of plastic; and / or; The fan motor is a three-phase motor, the rated power of the fan motor is less than or equal to 15W, and the rated operating voltage of the fan motor is 3.7-8.4V; and / or, The fan motor further comprises an input module and a control module, wherein the control module generates a PWM control signal according to the wind speed adjustment control signal, and controls the rotation speed of the fan motor through the PWM control signal; and / or, The fan blades include: a hub and moving blades arranged on the hub, the hub includes a top surface and a bottom surface, the top surface is a plane or an arc surface, and the ratio of the diameter of the top surface to the diameter of the bottom surface is 1:5-4:

5.

2. The portable fan according to claim 1, wherein: The mass of the fan motor is 10-50 grams; The ratio of the inner diameter of the fan housing to the length of the fan housing is 1:3-3:2; and / or, The ratio of the inner diameter of the fan housing to the maximum diameter of the fan blades is in the range of 1.01-1.15; and / or, The rated operating voltage of the fan motor is 3.7-8.4V, the rated power of the fan motor is 0.6-15W, and the rotation speed of the fan motor is 14000-48000 rpm; and / or, The input module is connected to the control module, the driving module includes a first bridge arm, a second bridge arm and a third bridge arm, the midpoint of each bridge arm includes an upper bridge arm switch tube and a lower bridge arm switch tube on both sides, the midpoint of each bridge arm is connected to a phase coil of the fan 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 tube of each bridge arm through the PWM control signal to adjust the speed of the fan motor; and / or, The fan housing is provided with stationary blades, and the ratio of the number of the stationary blades to the number of the moving blades is 0.5-1; and / or, The wind speed at the air outlet of the fan motor is 4m / s-25m / s, and the wind noise value of the fan motor is 10-89dB.

3. The portable fan according to claim 1, wherein: The portable fan also includes: A connecting piece, the connecting piece is arranged in the fan housing, and an air duct is opened on the connecting piece; An assembly base is connected to the connecting piece, the fan assembly is sleeved and connected to the assembly base, and the fan assembly is connected to the assembly base via a rotating shaft.

4. The portable fan according to claim 3, wherein: The assembly base is detachably connected to the connecting member, and the assembly base is made of metal; and / or, The fan housing is covered with a flexible sleeve, and the flexible sleeve is alternately provided with annular protrusions and dot-shaped protrusions on the outside; and / or, The connecting member comprises: a connecting ring and a plurality of connecting plates, wherein the plurality of connecting plates are arranged around the connecting ring, one end of each of the plurality of connecting plates is connected to the inner surface of the fan housing, the other end of each of the connecting plates is connected to the connecting ring, and two adjacent connecting plates of the plurality of connecting plates are enclosed to form the air duct; and / or, The end of each connecting plate facing the fan assembly is bent and extended toward the fan assembly to form an air guide plate, and the bending direction of the air guide plate is opposite to the rotation direction of the fan assembly; and / or, The fan assembly comprises: a fan motor and fan blades, wherein the fan motor is sleeved and connected to the assembly base, and the fan motor is connected to the assembly base via a rotating shaft, and the fan blades are connected to the assembly base via a rotating shaft; and / or, The assembly base comprises: a base and a connecting column, the base is connected to the connecting member, the connecting column is connected to the base, and the fan assembly is sleeved and connected to the connecting column.

5. The portable fan according to claim 4, wherein: The connecting member is provided with a plurality of first fixing holes, and the assembly base is provided with a plurality of second fixing holes correspondingly, and the plurality of first fixing holes and the plurality of second fixing holes are connected by screws; and / or, The connecting member is provided with a positioning groove, and one end of the assembly base connected to the connecting member is arranged in the positioning groove; and / or, The air guide plate is disposed between the fan assembly and the fan housing, and the air guide plate is connected to the inner surface of the fan housing, and there is a gap between the air guide plate and the fan assembly; and / or, The connecting ring comprises: a connecting outer ring and a connecting inner ring, the connecting inner ring is arranged inside the connecting outer ring, the connecting outer ring is connected to the plurality of connecting plates, the assembly base is connected to the connecting inner ring, and the thickness of the connecting outer ring is greater than the thickness of the connecting inner ring; and / or, The fan motor comprises: a coil, a magnetic ring and a motor housing, wherein the coil is sleeved on the assembly base, the magnetic ring is sleeved on the coil, the motor housing is sleeved on the magnetic ring, and the motor housing is fixedly connected to the rotating shaft so that the motor housing drives the rotating shaft to rotate; and / or, The fan blades include: a hub and a plurality of blades, wherein the plurality of blades are arranged around the hub, and the hub is connected to the rotating shaft.

6. The portable fan according to claim 5, wherein: The coil is interference-fitted with the assembly base, the magnetic ring is magnetically coupled with the coil, and the motor housing is interference-fitted with the rotating shaft; and / or, A limit stop edge is arranged inside the motor housing, and the limit stop edge abuts against one end of the magnetic ring; and / or, Each of the plurality of blades comprises a first end and a second end opposite to the first end, the length of the first end is greater than the length of the second end, each of the blades is provided with a blade edge, the thickness of each blade gradually increases from the first end to the blade edge, and the thickness of each blade gradually decreases from the blade edge to the second end; and / or, The hub comprises: a top surface, a bottom surface and a side edge, the cross-sectional area of ​​the bottom surface is larger than the cross-sectional area of ​​the top surface, and there is a smooth transition between the top surface and the side edge.

7. The portable fan according to claim 6, wherein: The length ratio of the first end portion to the second end portion is in the range of 1.4-1.

9.

8. The portable fan according to claim 4, wherein: The connecting column comprises: a first column and a second column, the diameter of the first column is larger than the diameter of the second column, the first column is connected to the base, the second column is connected to the first column, and the fan assembly is sleeved and connected to the second column; and / or, The connecting column is provided with a connecting hole, and the two ends of the connecting hole are respectively provided with a first bearing and a second bearing, the rotating shaft is inserted into and passes through the first bearing and the second bearing, and one end of the rotating shaft passing through the second bearing is provided with a clamping groove, and the clamping groove is connected with a retaining spring; and / or, The base comprises: a first protruding portion, a second protruding portion and a third protruding portion, wherein inner arc notches are formed between the first protruding portion, the second protruding portion and the third protruding portion, and an outer arc piece is provided between the second protruding portion and the third protruding portion.

9. The portable fan according to claim 8, wherein: A connecting platform is provided at the position where the fan assembly is connected to the rotating shaft, the rotating shaft passes through the connecting platform and is interference fit with the connecting platform, and one end of the connecting platform facing the first bearing abuts against the first inner ring of the first bearing; and / or, A shaft sleeve is arranged between the second bearing and the retaining spring. The shaft sleeve is sleeved on the rotating shaft, and one end of the shaft sleeve facing the second bearing abuts against the second inner ring of the second bearing.

10. The portable fan according to claim 4, wherein: A PCB circuit board is arranged between the base and the fan assembly, and the PCB circuit board is sleeved on the connecting column.

11. The portable fan according to claim 10, wherein: The connecting member is provided with a first wiring hole, the base is provided with a second wiring hole at the position of the first wiring hole correspondingly, and the thickness of the base at the position where the second wiring hole is provided is smaller than the thickness at other positions of the base.

12. The portable fan according to claim 1, wherein: The fan motor is connected to the fan blade via a rotating shaft. A first balance ring portion and a second balance ring portion are provided on the fan blade, and a diameter of the first balance ring portion is greater than a diameter of the second balance ring portion.

13. The portable fan according to claim 12, wherein: The first balancing ring portion and the second balancing ring portion are both surrounded by a plurality of balancing grooves; and / or, The number of balancing grooves of the first balancing ring portion is greater than the number of balancing grooves constituting the second balancing ring portion.

14. The portable fan according to claim 13, wherein: The balancing groove of the first balancing ring part is configured in a square shape, and the balancing groove of the second balancing ring part is configured in a wedge shape.

15. The portable fan according to claim 13, wherein: The plurality of moving blades extend obliquely around the surface of the hub, and the hub is connected to the rotating shaft; and The first balancing ring portion and the second balancing ring portion are both arranged on the surface of the hub; or, The first balance ring portion is arranged on the inner surface of the hub, and the second balance ring portion is arranged on the surface of the hub.

16. The portable fan according to claim 15, wherein Each of the plurality of moving blades includes a first end and a second end opposite to the first end, the length of the first end is greater than the length of the second end, the first balance ring portion is arranged on a side adjacent to the second end, and the second balance ring portion is arranged on a side adjacent to the first end.

17. The portable fan according to claim 16, wherein: Each of the moving blades is provided with a blade edge, and the thickness of each of the moving blades gradually increases from the first end to the blade edge, and the thickness of each of the moving blades gradually decreases from the blade edge to the second end.

18. The portable fan according to claim 16, wherein: The wheel hub includes: a top surface, a bottom surface and a side edge, the cross-sectional area of ​​the bottom surface is larger than the cross-sectional area of ​​the top surface, and there is a smooth transition between the top surface and the side edge, the first balance ring portion is arranged on the side edge and connected to the bottom surface, and the second balance ring portion is arranged on the side edge.

19. The portable fan according to claim 18, wherein: The second balancing ring portion is disposed between the top surface and the first end portion, and a plurality of balancing grooves of the second balancing ring portion are enclosed to form a truncated cone shape.

20. The portable fan of claim 16, wherein: The multiple balancing grooves of the first balancing ring part are arranged in pairs between two adjacent moving blades, and two adjacent balancing grooves of the first balancing ring part are separated by a first partition plate or a second partition plate. Along the circumferential direction of the hub, the length of the second partition plate is greater than the length of the first partition plate.

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