Portable fan

Abstract

Disclosed in the present application is a portable fan, comprising: a fan housing; and a fan assembly, which is assembled within the fan housing in a suspension manner, wherein the fan housing is provided with an air inlet and an air outlet arranged opposite the air inlet, an air intake grille is provided at the air inlet, and a spoiler post is provided on the side of the air intake grille facing the fan assembly. Alternatively, the fan housing comprises: an outer housing; an assembly base, which is arranged within the outer housing and abuts against an inner surface of the outer housing; and an inner housing, which has one end inserted into the outer housing from a first end of the outer housing, and is connected to the outer housing in a snap-fit manner, wherein the assembly base abuts against the inner housing, and the outer housing forms an opposite clamping on the assembly base and the inner housing, so as to form a stable abutting relationship between the assembly base and the inner housing.

Description

Portable fan

[0001] This application claims priority to Chinese Patent Applications Nos. 202520164657.5, 202520269202.X, 202520273959.6, 202520420584.1, 202520425920.1, and 202520528289.8, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of fans, and more particularly to a portable fan. Background Technology

[0003] In the hot summer, fans have become an essential item for people to relieve the heat. With people's demand for convenient use, lighter and more portable fans are becoming increasingly popular.

[0004] In the prior art, portable fans typically consist of a housing, a motor-driven fan assembly, and an air inlet / outlet structure. Their working principle is to generate airflow by rotating the fan, drawing air in through the air inlet and accelerating it out through the air outlet.

[0005] Application content

[0006] The purpose of this application is to provide a portable fan with a more robust connection and better protection for internal components.

[0007] This application provides a portable fan, including:

[0008] Fan housing; fan assembly, the fan assembly being suspended and mounted within the fan housing;

[0009] The fan housing has an air inlet and an air outlet opposite to the air inlet. An air inlet grille is provided at the air inlet, and a baffle column is provided on the side of the air inlet grille facing the fan assembly; or...

[0010] The fan housing includes: an outer shell; a mounting base disposed within the outer shell and abutting against the inner surface of the outer shell; an inner shell, one end of which is inserted into the outer shell from the first end of the outer shell and is snap-fitted to the outer shell; the mounting base abutting against the inner shell, and the outer shell clamping the mounting base and the inner shell to create a stable abutting relationship between the mounting base and the inner shell; or...

[0011] A connecting ring, connected to the fan housing; a base, located in the middle of the connecting ring and extending into the fan housing; a fan assembly connected to the base; multiple stationary blades, one end of any one of the stationary blades connected to the connecting ring, and the other end of any one stationary blade connected to the base, with a pressure-equalizing notch provided at the connection point between any one stationary blade and the base; or...

[0012] The handheld part is connected to the fan housing; the handheld part includes a front housing and a rear housing, the front housing and the rear housing are snapped together, the end of the rear housing that is suspended extends towards the front housing to form a support platform, and the front housing is connected to the support platform. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0014] Figure 1 is a first-view structural schematic diagram of a portable fan according to a specific embodiment 1 of this application;

[0015] Figure 2 is a schematic diagram of the portable fan structure from a second perspective according to a specific embodiment 1 of this application;

[0016] Figure 3 is a cross-sectional view of a portable fan according to a specific embodiment 1 of this application;

[0017] Figure 4 is an exploded view of a portable fan according to a specific embodiment 1 of this application;

[0018] Figure 5 is a first-view structural schematic diagram of the rear housing of a specific embodiment 1 of this application;

[0019] Figure 6 is a second-view structural schematic diagram of the rear shell of a specific embodiment 1 of this application;

[0020] Figure 7 is a schematic diagram of the front housing structure of a specific embodiment 1 of this application;

[0021] Figure 8 is a schematic diagram of the outer shell structure of a specific embodiment 1 of this application;

[0022] Figure 9 is a structural schematic diagram of the assembly base of a specific embodiment 1 of this application;

[0023] Figure 10 is a schematic diagram of the structure of the inner shell of a specific embodiment 1 of this application;

[0024] Figure 11 is a cross-sectional view of the mounting base and fan assembly combined in a specific embodiment 1 of this application;

[0025] Figure 12 is a structural schematic diagram of the first support member of a specific embodiment 1 of this application;

[0026] Figure 13 is a first-view structural schematic diagram of a portable fan according to a specific embodiment 2 of this application;

[0027] Figure 14 is a schematic diagram of the portable fan structure from a second perspective according to a specific embodiment 2 of this application;

[0028] Figure 15 is a cross-sectional schematic diagram of a portable fan according to a specific embodiment 2 of this application;

[0029] Figure 16 is a first-view structural schematic diagram of a portable fan according to a specific embodiment 3 of this application;

[0030] Figure 17 is a schematic diagram of the second-view structure of a portable fan according to a specific embodiment 3 of this application;

[0031] Figure 18 is a cross-sectional schematic diagram of a portable fan according to a specific embodiment 3 of this application;

[0032] Figure 19 is a schematic diagram of the assembly base and inner shell structure of a specific embodiment 3 of this application;

[0033] Figure 20 is a schematic diagram of the outer shell of a specific embodiment 3 of this application;

[0034] Figure 21 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 4 of this application;

[0035] Figure 22 is a first-view structural diagram of the 4th assembly base according to a specific embodiment of this application;

[0036] Figure 23 is an enlarged schematic diagram of region A in Figure 22 of a specific embodiment of this application;

[0037] Figure 24 is a schematic diagram of the assembly base from a second perspective of a specific embodiment of this application;

[0038] Figure 25 is a second-view structural schematic diagram of a portable fan according to a specific embodiment 4 of this application;

[0039] Figure 26 is a cross-sectional schematic diagram of a portable fan according to a specific embodiment 4 of this application;

[0040] Figure 27 is a schematic diagram of the outer shell structure of a specific embodiment 4 of this application;

[0041] Figure 28 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 5 of this application;

[0042] Figure 29 is a cross-sectional schematic diagram of a portable fan according to a specific embodiment 5 of this application;

[0043] Figure 30 is an enlarged schematic diagram of region B in Figure 29;

[0044] Figure 31 is an enlarged schematic diagram of region C in Figure 30;

[0045] Figure 32 is a cross-sectional schematic diagram of the magnetic ring and fan blades of a specific embodiment 5 of this application;

[0046] Figure 33 is a first-view structural schematic diagram of a portable fan according to a specific embodiment 6 of this application;

[0047] Figure 34 is a second-view structural schematic diagram of a portable fan according to a specific embodiment 6 of this application;

[0048] Figure 35 is a partially exploded view of a portable fan according to a specific embodiment 6 of this application;

[0049] Figure 36 is a schematic diagram of the rear shell structure of a specific embodiment 6 of this application;

[0050] Figure 37 is a schematic diagram of the front shell structure of a specific embodiment 6 of this application;

[0051] Figure 38 is a schematic diagram of the first support member structure of a specific embodiment 6 of this application;

[0052] Figure 39 is a schematic diagram of the fan housing structure of a specific embodiment 6 of this application. Detailed Implementation

[0053] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0054] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0055] Example 1

[0056] As shown in Figures 1 and 2, a portable fan includes: a fan housing 1; a fan assembly 3, which is suspended and assembled inside the fan housing 1; a handheld part 2, which is connected to the fan housing 1; the fan housing 1 extends towards the handheld part 2 to form a fixing seat 14, which is inserted into the handheld part 2 and snapped into the handheld part 2.

[0057] In the above embodiment, a fixing seat 14 is provided on the fan housing 1. The fixing seat 14 can be inserted into the handheld part 2 and snapped into place. This connection method eliminates the need for complex assembly processes when assembling the portable fan, thus improving assembly efficiency. At the same time, the fixing seat 14 increases the contact area between the fan housing 1 and the handheld part 2, thereby making the connection between the handheld part 2 and the fan housing 1 more stable.

[0058] As shown in Figure 3, in some embodiments, the fixing base 14 is provided with a first locking edge 141 and a second locking edge 142, which are spaced apart along the extension direction of the fixing base 14. The handheld part 2 is connected to the first locking edge 141 and the second locking edge 142 by a snap-fit.

[0059] As shown in Figures 5-7, in some embodiments, the handheld part 2 is provided with a locking stop 23 above the first locking edge 141, and the upper surface of the first locking edge 141 abuts against the lower surface of the locking stop 23; and / or,

[0060] The handheld part 2 is provided with a first card slot 24 at the position corresponding to the second card slot 142, and the second card slot 142 is disposed in the first card slot 24.

[0061] In some embodiments, the first latching slot 24 includes a first latching edge 241 and a second latching edge 242. The width of the first latching edge 241 is smaller than the width of the second latching edge 242. The first latching edge 241 is located on the side of the second latching edge 142 that is close to the first latching edge 141, and the second latching edge 242 is located on the side of the second latching edge 142 that is away from the first latching edge 141.

[0062] As shown in Figure 4, in some embodiments, the handheld part 2 further includes a battery assembly 4, which is disposed inside the handheld part 2, and one end of the battery assembly 4 abuts against the second snap-fit ​​edge 242.

[0063] In some embodiments, the handheld part 2 includes a front housing 21 and a rear housing 22, which are disposed around the fixing base 14 and are snap-fitted together.

[0064] In some embodiments, the end of the rear housing 22 that is suspended extends toward the front housing 21 to form a support platform 221, and the front housing 21 is connected to the support platform 221.

[0065] In some embodiments, a second snap-fit ​​groove 221a is provided on the support platform 221, and a snap-fit ​​arc 211 that mates with the second snap-fit ​​groove 221a is provided on the inner surface of the front housing 21.

[0066] In some embodiments, the handheld part 2 further includes a battery assembly 4, and a first support member 25 is disposed between the battery assembly 4 and the support platform 221.

[0067] As shown in Figure 12, in some embodiments, the first support member 25 is provided with an arc-shaped guide groove 251 at one end corresponding to the rear housing 22, and the rear housing 22 is provided with a rope hole 223 at the position corresponding to the arc-shaped guide groove 251.

[0068] In some embodiments, the front housing 21 extends along the direction of the rear housing 22 above the snap-fit ​​arc 211 to form a second support member 212, and the support platform 221 is provided with a support column 222 below the second support member 212.

[0069] In some embodiments, the second support member 212 abuts against the first support member 25.

[0070] In some embodiments, both the second support 212 and the support column 222 are configured in a wedge shape.

[0071] As shown in Figures 8-10, in some embodiments, the fan housing 1 includes an outer shell 11, an inner shell 12, and a mounting base 13. The outer shell 11 extends toward the handheld part 2 to form a fixing base 14. The inner shell 12 and the mounting base 13 are both disposed inside the outer shell 11, and the fan assembly 3 is connected to the mounting base 13.

[0072] In some embodiments, the inner housing 12 and the outer housing 11 are snap-fitted together, the mounting base 13 is snap-fitted together with the outer housing 11, and the inner housing 12 and the mounting base 13 abut against each other.

[0073] In some embodiments, one end of the housing 11 extends radially inward to form a first snap ring 111, and the outer surface of the mounting base 13 protrudes to form a second snap ring 134 that mates with the first snap ring 111.

[0074] In some embodiments, one end of the inner housing 12 abuts against the mounting base 13, and the other end of the inner housing 12 abuts against one end of the outer housing 11. A third snap ring 121 is provided on the outer surface of the inner housing 12, and a plurality of claws 112 that cooperate with the third snap ring 121 are protruding on the inner surface of the outer housing 11.

[0075] In some embodiments, the mounting base 13 includes a connecting ring 131, an air guide seat 132, and a plurality of stationary blades 133. The connecting ring 131 is snapped into the outer shell 11 and abuts against the inner shell 12. The plurality of stationary blades 133 are disposed between the connecting ring 131 and the air guide seat 132. The fan assembly 3 is connected to the air guide seat 132.

[0076] In some embodiments, each of the plurality of stationary blades 133 has a pressure equalization notch 133a between one end of the stationary blade 133 and the air guide seat 132.

[0077] In some embodiments, the mounting base 13 further includes a connector 135, one end of which is detachably connected to the air guide seat 132, and the other end of which is connected to the fan assembly 3.

[0078] In some embodiments, the connector 135 extends toward the fan assembly 3 to form a hollow tube 136, and the fan assembly 3 is connected to the hollow tube 136.

[0079] In some embodiments, a dustproof sticker 137 is provided at one end of the hollow tube 136 facing the air guide seat 132.

[0080] As shown in Figure 11, in some embodiments, the fan assembly 3 includes: a bushing 32, a fan blade 31, and a rotating shaft 33. The bushing 32 is disposed inside the hollow tube 136, one end of the rotating shaft 33 passes through the bushing 32, and the other end of the rotating shaft 33 is connected to the fan blade 31.

[0081] In some embodiments, the fan blade 31 includes a hub 311 and a connecting post 312 disposed in the middle of the hub 311, the connecting post 312 being connected to the rotating shaft 33.

[0082] In some embodiments, the outer diameter of the connecting post 312 is smaller than the inner diameter of the hollow tube 136, and at least a portion of the structure of the connecting post 312 is inserted into the hollow tube 136 to reduce oil leakage from the bushing 32.

[0083] In some embodiments, an air inlet grille 122 is provided at one end of the fan housing 1, and the center of the air inlet grille 122 protrudes in the direction facing the fan blade 31 to form a turbulence column 123.

[0084] In some embodiments, the outer diameter of the spoiler column 123 is equal to the diameter of the end face of the fan blade 31 facing the spoiler column 123.

[0085] In some embodiments, the outer diameter of the turbulence column 123 is smaller than the diameter of the end face of the fan blade 31 facing the turbulence column 123.

[0086] In some embodiments, the distance between the end of the suspended end of the baffle column 123 and the end face of the fan blade 31 facing the baffle column 123 is less than the diameter of the baffle column 123.

[0087] Example 2

[0088] Please refer to Figures 13 and 14. Figure 13 is a schematic diagram of the portable fan structure from a first perspective in this embodiment; Figure 14 is a schematic diagram of the portable fan structure from a second perspective in this embodiment.

[0089] As shown in Figures 13 and 14, a portable fan includes: a fan housing 1; a fan assembly 2, which is suspended and assembled inside the fan housing 1; the fan housing 1 has an air inlet 11 and an air outlet 12 opposite to the air inlet 11, an air inlet grille 13 is provided at the air inlet 11, and a baffle column 131 is provided on the side of the air inlet grille 13 facing the fan assembly 2.

[0090] In this embodiment, the fan housing 1 is a cylindrical hollow housing, with the air inlet 11 and air outlet 12 positioned opposite each other. 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 (but is not limited to): elliptical, spherical, or prismatic. In some embodiments, a handle is also fitted onto the fan housing 1 for easy gripping. In some embodiments, the portable fan can be used as an independent module, with an expansion interface provided on the fan housing 1 for connecting to corresponding expansion modules.

[0091] In this embodiment, the fan housing 1 is made of plastic, which provides advantages such as lightweight, wear resistance, and corrosion resistance. However, the material of the fan housing 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the fan housing 1 can be made of metal, alloy, or other materials.

[0092] In this embodiment, the fan assembly 2 includes a fan motor 21 and fan blades 22. The fan motor 21 can be (but is not limited to): a single-phase motor, a two-phase motor, or a three-phase motor. The fan blades 22 can be axial flow blades or diagonal flow blades.

[0093] In this embodiment, the air intake fence 13 is an arc-shaped fence. However, the structure of the air intake fence 13 is not limited to this. Depending on the specific application scenario, in some embodiments, the structure of the air intake fence 13 can be a straight bar fence or a grid fence.

[0094] In this embodiment, the spoiler column 131 is cylindrical. However, the shape of the spoiler column 131 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the spoiler column 131 can be conical, frustum-shaped, polygonal, etc.

[0095] The above-described embodiment, by setting a baffle column 131 at the air inlet grille 13, can effectively interfere with the turbulence generated in the narrow area between the air inlet grille 13 and the fan blades. Specifically, the setting of the baffle column 131 deprives the space environment for the turbulence that would normally remain stably at this location of its generation, thereby changing the direction and velocity distribution of the airflow, reducing the turbulence and swirling of the airflow in the narrow area, allowing air to be drawn into the fan more efficiently, and thus improving the performance of the entire fan system. By reducing the formation of turbulence, the baffle column 131 effectively reduces the degree of airflow turbulence, thereby reducing the friction and collision between the airflow and the fan blades, and thus significantly reducing wind noise. This not only improves the user experience, but also makes the fan quieter during operation. At the same time, the baffle column 131 also has a guiding function, guiding the airflow in the gap of the air inlet grille 13 to the center position of the fan blades 22 through the wall effect. In traditional fan designs, because the rotational linear velocity at the center position of the fan blades is low, the pressure difference between this position and the external atmospheric pressure is too small, resulting in a relatively small intake volume at the center position. The design of the spoiler column 131 effectively solves this problem. By guiding the airflow, it increases the air intake at the center, making the airflow distribution of the entire fan more uniform and improving the overall performance and efficiency of the fan.

[0096] Please refer to Figure 15, which is a cross-sectional schematic diagram of the portable fan in this embodiment.

[0097] As shown in Figure 15, in some embodiments, the fan assembly 2 includes a fan motor 21 and a fan blade 22. The fan motor 21 is suspended and mounted inside the fan housing 1, and the fan blade 22 is sleeved on the rotor 212 of the fan motor 21. The fan blade 22 is rotatably connected to the fan housing 1 through a rotating shaft 23.

[0098] The fan motor 21 includes a stator 211 and a rotor 212. The stator 211 is connected to the mounting base 14, and the rotor 212 is sleeved on the stator 211. The rotor 212 is sleeved on the stator 211 by magnetic coupling. The fan blades 22 are sleeved on the rotor 212.

[0099] The rotor 212 is specifically a magnetic ring, which is embedded in the hub 221 of the fan blade 22. In some embodiments, the rotor 212 is a plurality of bar magnets, which surround the inner peripheral wall of the hub 221 to form a ring.

[0100] The stator 211 includes an iron core and multiple coils wound on the iron core. The iron core is fitted onto a hollow tube 141.

[0101] The fan blades 22 are also connected to the fan housing 1 via a rotating shaft 23. Specifically, a bushing is provided inside the hollow tube 141, one end of the rotating shaft 23 is inserted into the hollow tube 141, and the other end is connected to the fan blades 22. The rotating shaft 23 can rotate relative to the bushing.

[0102] The connection between the fan blades 22 and the rotor 212 of the fan motor 21 effectively reduces the torque during the rotation of the fan blades 22, making the rotation of the fan blades 22 more sensitive. Meanwhile, the fan blades 22 are rotatably connected to the fan housing 1 via a shaft 23. In this embodiment, the shaft 23 is a non-powered structure; however, its presence ensures the stability of the connection between the fan blades 22 and the fan blades 22, making their rotation more stable.

[0103] In some embodiments, the fan blade 22 includes a hub 221 and a plurality of moving blades 222. The plurality of moving blades 222 are arranged around the hub 221 at equal intervals. The hub 221 is provided with a first end face 221a and a second end face 221b in sequence along the direction from the air inlet 11 to the air outlet 12. The diameter of the first end face 221a is smaller than the diameter of the second end face 221b.

[0104] The first end face 221a is located at the air inlet end of the fan blade 22, while the second end face 221b is located at the air outlet end of the fan blade 22. The diameter of the first end face 221a is smaller than the diameter of the second end face 221b, meaning that the area of ​​the first end face 221a is smaller than the area of ​​the second end face 221b. A smaller air inlet area reduces resistance when air enters the hub 221, allowing air to enter the fan blade 22 more smoothly. A larger open space at the air inlet also makes the airflow more uniform before entering the blades, thereby improving the overall airflow efficiency of the fan. A smaller air inlet area also reduces turbulence when air enters the hub 221. Turbulence leads to energy loss and efficiency reduction; reducing turbulence improves the overall efficiency of the fan. The diameter of the first end face 221a is smaller than the diameter of the second end face 221b, which makes the hub 221 larger in the space between the first end face 221a and the second end face 221b. This structure reduces the space for airflow and increases the airflow speed, making the portable fan blow air better.

[0105] In this embodiment, the first end face 221a is a planar structure. However, the structure of the first end face 221a is not limited to this. Depending on the specific application scenario, in some embodiments, when the hub 221 of the fan blade 22 is a conical structure, the first end face 221a is a hemispherical or inferior arc structure. In this case, the diameter of the first end face 221a refers to the diameter of the hemispherical structure of the first end face 221a, or the diameter of the largest cross-sectional circle of the inferior arc structure.

[0106] In some embodiments, the outer diameter of the baffle column 131 is equal to the diameter of the first end face 221a. That is, the annular area of ​​the baffle column 131 is equal to the area of ​​the first end face 221a. Since the outer diameter of the baffle column 131 is equal to the diameter of the first end face 221a, the cross-sectional area of ​​the flow channel remains constant after the airflow enters through the air inlet grille 13, avoiding local acceleration or deceleration caused by abrupt changes in cross-sectional area. According to Bernoulli's equation and the continuity equation, a consistent cross-sectional area can homogenize the airflow velocity, reduce energy loss caused by kinetic energy-pressure energy conversion, and improve the overall air intake efficiency. Through the consistency of the cross-sectional area, the airflow transitions smoothly on the surface of the baffle column 131, reducing turbulent kinetic energy, reducing the risk of airflow separation, and further reducing energy loss. The reduction in airflow energy loss directly reduces aerodynamic noise caused by turbulent pulsation and vortex shedding. This design is more adaptable to changes in airflow velocity, maintaining high efficiency at both low speed (silent mode) and high speed (strong wind mode), broadening the operating range of portable fans. This implementation method is applicable to any scenario where the first end face 221a is a plane, a hemispherical shape, or a slightly curved shape.

[0107] In some embodiments, when the first end face 221a is hemispherical or slightly curved, the outer diameter of the turbulence column 131 is smaller than the diameter of the first end face 221a. In this embodiment, since the first end face 221a itself is curved, its cross-sectional area gradually increases along the airflow direction. Therefore, setting the cross-sectional area of ​​the turbulence column 131 to be smaller than the maximum cross-sectional area of ​​the first end face 221a ensures that the cross-section of the flow channel remains constant at least with one of the cross-sectional areas of the first end face 221a, avoiding local acceleration or deceleration caused by abrupt changes in cross-sectional area. The curved first end face 221a further reduces the resistance at the junction of the turbulence column 131 and the first end face 221a, making the airflow velocity more stable. The reduction in airflow energy loss directly reduces aerodynamic noise caused by turbulent pulsation and vortex shedding. This design is more adaptable to changes in airflow velocity, maintaining high efficiency at both low speeds (silent mode) and high speeds (strong wind mode), broadening the operating range of the portable fan.

[0108] In some embodiments, the straight-line distance between the end of the suspended end 131b of the turbulence column 131 and the first end face 221a is less than the diameter of the turbulence column 131. It is well known that a condition for turbulence to form within a fluid is the existence of a velocity difference between the fluids. The space between the first end face 221a and the turbulence column 131 is prone to forming a slow-flow region due to the obstruction of the first end face 221a and the turbulence column 131, thus generating turbulence. To reduce the scale and space of turbulence, the straight-line distance between the end of the suspended end 131b of the turbulence column 131 and the first end face 221a is set to be less than the diameter of the turbulence column 131. This "near-end distance" structure suppresses flow separation phenomena in conventional wakes, reduces dead zones, makes fluid distribution more uniform, avoids excessive local temperature gradients, and improves the reliability of system thermal management. Simultaneously, because the end-to-end distance is small, the scale of turbulence formation is suppressed, preventing the effects of turbulence from spreading to the surface of the turbulence column 131, further reducing energy loss and aerodynamic noise.

[0109] In some embodiments, a receiving cavity 131a is formed within the turbulence column 131, with the opening of the receiving cavity 131a located at the end of the suspended end 131b of the turbulence column 131. The receiving cavity 131a, with its opening at the suspended end 131b, creates a "suction-ejection" effect when fluid passes through, generating multi-scale vortices inside and outside the cavity. These vortices within the cavity can dissipate the energy consumption of the overall turbulence, reduce energy in the external turbulent region, and weaken the turbulent energy in the external space that could interfere with normal airflow, further reducing airflow energy loss and aerodynamic noise.

[0110] In some embodiments, the fan housing 1 includes an outer shell and a mounting base 14, the mounting base 14 being detachably connected to the outer shell, the mounting base 14 being provided with a hollow tube 141, and the fan motor 21 being connected to the hollow tube 141 so that the fan assembly 2 is suspended.

[0111] The connection between the outer shell and the mounting base 14 is a snap-fit ​​connection. However, the connection method between the outer shell and the mounting base 14 is not limited to this. Depending on the specific application scenario, in some embodiments, the connection method between the outer shell and the mounting base 14 can also be a screw connection or a magnetic connection. The detachable connection between the outer shell and the mounting base 14 can effectively improve the efficiency of separate manufacturing of the outer shell and the mounting base 14, and can also improve the assembly efficiency of the two.

[0112] In some embodiments, the fan motor 21 includes: a stator 211, which is sleeved on a hollow tube 141; a rotor 212 magnetically coupled to the stator 211; a fan blade 22 connected to the rotor 212; and a PCB circuit board 3 disposed between the stator 211 and the mounting base 14, which is sleeved on the hollow tube 141 and connected to the stator 211 via conductive feet.

[0113] The stator 211 in this embodiment includes an iron core and a coil wound on the iron core. A hole is made in the middle of the iron core so that it can be fitted onto the hollow tube 141, and the two are connected by a fastening mechanism.

[0114] In this embodiment, the rotor 212 is specifically a magnetic ring. The rotor 212 is connected to the stator 211 by magnetic coupling. The fan blades 22 are sleeved on the magnetic ring. When the stator 211 is energized, the magnetic ring rotates under the action of magnetic force, and the fan blades 22 rotate synchronously with the magnetic ring.

[0115] A PCB circuit board 3 is disposed between the stator 211 and the mounting base 14. An opening is also provided in the middle of the PCB circuit board 3, allowing it to be fitted onto the hollow tube 141. However, due to the limited strength of the PCB circuit board 3 itself, the fastening connection between the PCB circuit board 3 and the hollow tube 141 is relatively unstable. To enhance the connection stability of the PCB circuit board 3, it is connected to the stator 211 via conductive feet. These conductive feet not only conduct electrical signals but also provide physical support to the PCB circuit board 3, making the connection of the PCB circuit board 3 more stable.

[0116] In some embodiments, an air inlet gap 4 is provided between the mounting base 14 and the fan blades 22, and at least a portion of the PCB circuit board 3 is located within the annular space formed by the air inlet gap 4. With a portion of the PCB circuit board 3 embedded within the annular space formed by the air inlet gap 4, the airflow generated during fan operation flows directly across the PCB surface, rapidly removing its operating heat through forced convection, thus preventing circuit performance degradation or failure due to localized temperature rise. Simultaneously, nesting the PCB circuit board 3 within the hollow tube 141 between the stator 211 and the mounting base 14, and allowing a portion to extend into the air inlet gap 4, maximizes heat dissipation using the fan's own airflow without additional space requirements, making it particularly suitable for portable fan devices. The annular space design of the air inlet gap 4 ensures uniform airflow distribution along the circumference of the PCB, avoiding localized cooling dead zones caused by traditional lateral airflow and improving heat dissipation consistency. The PCB is encased inside the motor, and the airflow through the air inlet gap 4 creates a positive pressure environment, reducing the intrusion of external dust or moisture and extending circuit life.

[0117] Example 3

[0118] Please refer to Figures 16 and 17. Figure 16 is a schematic diagram of the portable fan structure from a first perspective in this embodiment; Figure 17 is a schematic diagram of the portable fan structure from a second perspective in this embodiment.

[0119] As shown in Figures 16 and 17, a portable fan includes: an outer shell 11; a mounting base 12 disposed within the outer shell 11 and abutting against the inner surface of the outer shell 11; an inner shell 13, one end of which is inserted into the outer shell 11 from the first end of the outer shell 11 and is snap-fitted to the outer shell 11; and a fan assembly 2 connected to the mounting base 12 and suspended inside the inner shell 13. The mounting base 12 and the inner shell 13 abut against each other, and the outer shell 11 forms an opposing clamping relationship between the mounting base 12 and the inner shell 13, so that the mounting base 12 and the inner shell 13 form a stable abutting relationship.

[0120] The outer shell 11, the inner shell 13, and the mounting base 12 are collectively referred to as the fan housing 1.

[0121] In this embodiment, the outer casing 11 is a cylindrical hollow casing, with the air inlet 14 and air outlet 15 of the outer casing 11 arranged opposite to each other. However, the shape of the outer casing 11 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the outer casing 11 can be (but is not limited to): elliptical, spherical, or prismatic. In some embodiments, a handle is also fitted on the outer casing 11 for easy gripping. In some embodiments, the portable fan can be a standalone module, and the outer casing 11 is provided with an expansion interface for connecting to corresponding expansion modules.

[0122] In this embodiment, the outer shell 11 is made of plastic, which has the advantages of being lightweight, wear-resistant, and corrosion-resistant. However, the material of the outer shell 11 is not limited to this. Depending on the specific application scenario, in some embodiments, the outer shell 11 can be made of metal materials, alloy materials, etc.

[0123] In this embodiment, the mounting base 12 includes a connecting ring 122, a base 123, and a plurality of stationary blades 124. The connecting ring 122 abuts against the inner surface of the outer casing 11 and also against the inner casing 13. One end of each of the plurality of stationary blades 124 is connected to the connecting ring 122, and the other end is connected to the base 123. The fan assembly 2 is connected to the base 123.

[0124] The base 123 includes a hollow tube 125. The hollow tube 125 can be integrally formed onto the base 123 or manufactured in parts. When the hollow tube 125 is manufactured in parts, a connecting seat 126 is provided at one end of the hollow tube 125, and the connecting seat 126 is connected to the base 123 by screws or snap-fit.

[0125] The fan assembly 2 is connected to the hollow tube 125, thus achieving an assembly method that allows it to be suspended inside the inner housing 13. The connection method between the hollow tube 125 and the fan assembly 2 is a conventional connection method in the prior art, and will not be described in detail here.

[0126] In this embodiment, the mounting base 12 is also made of plastic. Plastic material can reduce the weight of the mounting base 12. Similarly, depending on the specific application scenario, in some embodiments, the mounting base 12 can be made of metal materials, alloy materials, etc.

[0127] In this embodiment, the inner housing 13 is also made of plastic, and the lightweight plastic reduces the overall weight of the portable fan. Similarly, depending on the specific application scenario, in some embodiments, the mounting base 12 can be made of metal, alloy, or other materials.

[0128] In this embodiment, the fan assembly 2 includes a fan motor 21 and fan blades 22. The fan motor 21 can be (but is not limited to): a single-phase motor, a two-phase motor, or a three-phase motor. The fan blades 22 can be axial flow blades or diagonal flow blades.

[0129] The above-described implementation decomposes the overall structure into three independent modules: the outer shell 11, the inner shell 13, and the assembly base 12. A modular design and manufacturing process is adopted, allowing each component to be produced independently using a mold. Compared to traditional integrated structures, the modular design significantly reduces the structural complexity of individual components, simplifies mold development, and reduces material forming process requirements, thereby lowering the defect rate and improving manufacturing efficiency. A dual-effect assembly system of "abutment + snap-fit" is employed: the inner shell 13 and the outer shell 11 achieve rapid positioning and locking through snap-fit, while the assembly base 12 and the outer shell 11 achieve physical limitation through abutment. Together, they form a three-dimensional spatial constraint. This assembly method breaks through traditional screw fixing or adhesive processes, reducing the overall assembly process by more than 60%. Ordinary workers can complete the core structure assembly within 30 seconds with simple training, significantly improving production line efficiency. Simultaneously, the threadless structure avoids the problem of stripping threads caused by long-term use. In the innovatively designed triangular stable architecture, the outer shell 11 acts as a rigid constraint layer, applying bidirectional clamping force to the assembly base 12 and the inner shell 13 through its inner wall, forming a mechanical interlocking effect similar to mortise and tenon joints in architecture. Vibration tests have verified that this structure reduces the displacement between components to below 0.12 mm, effectively suppressing resonance.

[0130] Please refer to Figures 18 and 20. Figure 18 is a cross-sectional view of the portable fan of this embodiment; Figure 20 is a structural diagram of the outer casing of this embodiment.

[0131] As shown in Figures 18 and 20, in some embodiments, the abutment between the mounting base 12 and the outer shell 11 is specifically as follows: one end of the outer shell 11 extends radially inward to form a first stop ring 111, and the outer surface of the mounting base 12 protrudes to form a second stop ring 121 that cooperates with the first stop ring 111.

[0132] In this embodiment, the first stop ring 111 is raised on the inner surface of the outer casing 11, and the first stop ring 111 has a continuous ring structure. However, the structure of the first stop ring 111 is not limited to this. In some embodiments, the first stop ring 111 can be formed by multiple arc-shaped protrusions, and there is a gap between adjacent arc-shaped protrusions.

[0133] In this embodiment, the second stop ring 121 is disposed on the outer surface of the mounting base 12. Specifically, the second stop ring 121 protrudes from the outer surface of the connecting ring 122 of the mounting base 12. The second stop ring 121 is formed by a plurality of arc-shaped protrusions, and there is a gap between adjacent arc-shaped protrusions. However, the structure of the second stop ring 121 is not limited to this. In some embodiments, the structure of the second stop ring 121 is a continuous ring structure.

[0134] The mating design of the first stop ring 111 and the second stop ring 121 precisely limits the position of the mounting base 12 within the housing 11, preventing the mounting base 12 from shifting or loosening during use. This limiting effect ensures the stability and reliability of the fan assembly 2. Because the connection between the mounting base 12 and the housing 11 is more stable, the vibration energy generated during fan operation is effectively absorbed and dispersed, thereby significantly reducing the noise level.

[0135] In some embodiments, a buffer is provided between the mounting base 12 and the inner housing 13. Vibration occurs during fan operation, especially when the fan blades rotate at high speed, transmitting vibrations to the mounting base 12 and the inner housing 13. The buffer absorbs vibration energy through its elastic properties, reducing the likelihood of vibration transmission to the outer housing 11 or other components. The presence of the buffer avoids rigid contact between the mounting base 12 and the inner housing 13, reducing mechanical stress concentration caused by vibration or impact. This design further improves structural stability. The buffer also allows for a wider range of manufacturing tolerances for the mounting base 12 and the inner housing 13, reducing the required manufacturing precision.

[0136] In this embodiment, the buffer is a silicone ring. However, the material of the buffer is not limited to this. Depending on the specific application scenario, in some embodiments, the buffer can be a paper buffer ring, a fabric buffer ring, or other structures with a buffering function.

[0137] In some embodiments, one end of the inner housing 13 abuts against the mounting base 12, and the other end of the inner housing 13 abuts against one end of the outer housing 11. A first locking ring 131 is provided on the outer surface of the inner housing 13, and multiple claws 112 protrude from the inner surface of the outer housing 11 to engage with the first locking ring 131. The two ends of the inner housing 13 abut against the mounting base 12 and the end of the outer housing 11, respectively, avoiding the need for additional fasteners in traditional connection methods, thus simplifying the structure and saving space. The engaging design of the first locking ring 131 and the multiple claws 112 provides a reliable locking effect, effectively preventing loosening due to vibration or impact, and improving the overall structural stability.

[0138] In some embodiments, multiple reinforcing ribs 132 are provided on the outer surface of the inner housing 13. All reinforcing ribs 132 are parallel to the axis of the inner housing 13. At least one reinforcing rib 132 has its end connected to a first snap-fit ​​ring 131, and at least one reinforcing rib 132 passes through the first snap-fit ​​ring 131 with its two ends connected to both ends of the inner housing 13. The multiple reinforcing ribs 132 provided on the outer surface of the inner housing 13, especially those connected to or passing through the first snap-fit ​​ring 131, significantly improve the overall rigidity and structural stability of the inner housing 13. The arrangement of the reinforcing ribs 132 parallel to the axis of the inner housing 13 effectively resists axial and radial deformation, preventing the inner housing 13 from twisting or bending due to external forces. The design of the reinforcing ribs 132 not only enhances the strength of the inner shell 13 itself, but also indirectly improves the support capacity of the outer shell 11 by connecting to or penetrating the first snap-fit ​​ring 131. The rational layout of the reinforcing ribs 132 makes the stress distribution of the inner shell 13 under external forces more uniform. In particular, the design where some reinforcing ribs 132 penetrate the first snap-fit ​​ring 131 and connect to both ends of the inner shell 13 can evenly transfer stress from the snap-fit ​​area to both ends of the inner shell 13 under load, avoiding stress concentration. This design significantly reduces the risk of structural fatigue and extends the product's service life. The presence of the reinforcing ribs 132 can effectively absorb and disperse the energy of vibration or impact loads. In particular, the design of reinforcing ribs 132 of varying lengths (some connected to the first snap-fit ​​ring 131, some penetrating the first snap-fit ​​ring 131 and connecting to both ends) forms an interlaced support structure, further enhancing the seismic performance of the inner shell 13.

[0139] It should be further pointed out that the reinforcing rib 132 serves as a medium for transmitting vibration waves from the inner shell 13 to the outer shell 11. The reinforcing ribs 132 of varying lengths can transmit vibrations to different positions on the outer shell 11, and the vibration waves at different positions will interfere with each other, thereby reducing the mechanical vibration on the outer shell 11.

[0140] The reinforcing ribs 132 in this embodiment can be (but are not limited to): 2, 3, 4, 5 or more.

[0141] In some embodiments, the first snap-fit ​​ring 131 is provided with reinforcing blocks 133 at corresponding positions of the plurality of snap claws 112. The reinforcing blocks 133 are located on the opposite side of the first snap-fit ​​ring 131 and the plurality of snap claws 112. The reinforcing ribs 132 on the adjacent sides of the reinforcing blocks 133 all pass through the first snap-fit ​​ring 131 and their ends are respectively connected to the two ends of the inner shell 13. The reinforcing blocks 133 on the first snap-fit ​​ring 131 and the reinforcing ribs 132 on the adjacent sides work together to further enhance the structural rigidity and stability of the inner shell 13. The reinforcing blocks 133 are located on the opposite side of the first snap-fit ​​ring 131 and the snap claws 112, which can effectively share the external force on the first snap-fit ​​ring 131 and evenly transfer the load to the two ends of the inner shell 13 through the reinforcing ribs 132 on the adjacent sides. The cooperative design of the reinforcing blocks 133 and the reinforcing ribs 132 enhances the seismic performance of the inner shell 13. When the device is subjected to vibration or impact, the reinforcing block 133 can absorb some of the energy and distribute the vibration load evenly to both ends of the inner shell 13 through the reinforcing ribs 132 on both sides.

[0142] In this embodiment, the reinforcing block 133 consists of multiple wedge-shaped protrusions on the outer surface of the inner housing 13 and the first snap-fit ​​ring 131. The number of a set of wedge-shaped protrusions can be 1, 2, 3, 4 or more.

[0143] In this embodiment, the shape of the reinforcing block 133 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the reinforcing block 133 can be (but is not limited to): sphere, triangle, square or other polygon.

[0144] In some embodiments, the cross-sectional thickness of any one of the plurality of reinforcing ribs 132 gradually decreases along the direction from the air inlet 14 to the air outlet 15, while the cross-sectional thickness of the outer shell 11 gradually increases along the same direction. The design of the reinforcing rib 132 gradually decreasing in cross-sectional thickness from the air inlet 14 to the air outlet 15 complements the design of the outer shell 11 gradually increasing in cross-sectional thickness from the air inlet 14 to the air outlet 15. This structure can be optimized according to the distribution characteristics of airflow or external forces on the inner shell 13 and the outer shell 11, resulting in a more uniform stress distribution between the two. Specifically, at the air inlet 14, the thicker design of the reinforcing rib 132 can withstand greater external forces or airflow impacts, while the thinner design of the outer shell 11 reduces material usage and weight. At the air outlet 15, the thinner design of the reinforcing rib 132 reduces unnecessary material waste, while the thicker design of the outer shell 11 provides stronger support, thereby improving the overall stability and durability of the structure. The outer casing 11 is thinner at the end where the first snap-fit ​​ring 131 is located, resulting in greater deformation capability. This makes it easier and more secure for the latch 112 to engage with the first snap-fit ​​ring 131. At the same time, because the outer casing 11 is thinner at the air inlet 14, its end is more likely to form a tight abutment with the end of the inner casing 13, thereby improving the tightness of the assembly and the sealing performance.

[0145] In this embodiment, the cross-sectional thickness of the outer shell 11 refers to the local cross-sectional thickness at the position relative to any of the reinforcing ribs 132, and not the overall cross-sectional thickness of the outer shell 11.

[0146] Please refer to Figure 19, which is a schematic diagram of the assembly base and inner shell structure in this embodiment.

[0147] As shown in Figure 19, in some embodiments, a first insertion structure 134 and a second insertion structure 135 are provided at the position where the mounting base 12 and the inner shell 13 abut against each other. The insertion depth of the first insertion structure 134 is greater than that of the second insertion structure 135, and the insertion contact area of ​​the second insertion structure 135 is greater than that of the first insertion structure 134. The different insertion depths and contact areas of the first insertion structure 134 and the second insertion structure 135 between the mounting base 12 and the inner shell 13 enhance the connection stability between them. The larger insertion depth of the first insertion structure 134 ensures the robustness of the mechanical connection, effectively preventing loosening due to vibration or impact; while the larger contact area of ​​the second insertion structure 135 improves the contact uniformity at the connection point, reduces stress concentration, and further enhances the reliability of the overall structure. The deep insertion design of the first insertion structure 134 can better withstand larger axial loads, while the wide contact area of ​​the second insertion structure 135 can effectively disperse radial loads. This complementary design ensures more even force transmission between the mounting base 12 and the inner housing 13, preventing structural damage caused by excessive local stress and improving the overall load capacity and service life of the device. The deep insertion design of the first insertion structure 134 and the wide contact area design of the second insertion structure 135 work together to enhance the vibration and impact resistance between the mounting base 12 and the inner housing 13. When the device is subjected to vibration or impact, the deep insertion of the first insertion structure 134 provides stronger fixation, while the wide contact area of ​​the second insertion structure 135 absorbs more energy, reducing the impact force transmitted to the inner housing 13, thereby protecting the internal components from damage. In addition, the wide contact area of ​​the second insertion structure 135 also helps to improve sealing performance, preventing external dust, moisture, etc. from entering the device and enhancing the device's protective capabilities.

[0148] In some embodiments, the first plug-in structure 134 includes: a plurality of plug-in posts 134a and a plurality of plug-in slots 134b that are paired together. The plurality of plug-in posts 134a protrude from the inner housing 13 and extend toward the mounting base 12, and the plurality of plug-in slots 134b are disposed on the mounting base 12.

[0149] In this embodiment, the plug-in post 134a is cylindrical. However, the shape of the plug-in post 134a is not limited to this. Depending on the specific application scenario, in some embodiments, the plug-in post 134a can be a prism. The corresponding plug-in slot 134b is constructed as a circular cavity. When the plug-in post 134a is a type, the plug-in slot 134b is designed as a polygonal cavity corresponding to the plug-in post 134a.

[0150] The number of plug posts 134a and plug slots 134b is (not limited to): 2, 3, 4 or more.

[0151] In some embodiments, at least a portion of the structure of the insertion slot 134b is exposed on the outer surface of the mounting base 12.

[0152] In some embodiments, the second plug-in structure 135 includes: a plurality of plug-in tabs 135a and a plurality of paired plug-in grooves 135b. The plurality of plug-in tabs 135a protrude from the inner housing 13 and extend toward the mounting base 12, while the plurality of plug-in grooves 135b are recessed inward and formed on the outer surface of the mounting base 12. The plurality of plug-in tabs 135a are evenly distributed on the inner housing 13 and correspond one-to-one with the plug-in grooves 135b on the mounting base 12, forming a multi-point support structure. This design can evenly transfer the external force on the inner housing 13 to the mounting base 12, avoiding structural damage caused by excessive force at a single point. At the same time, the plug-in structure can also effectively distribute radial and axial loads, improving the load balance capability of the overall structure.

[0153] The number of plug-in tabs 135a and plug-in grooves 135b is (not limited to): 2, 3, 4 or more.

[0154] In some embodiments, the inner housing 13 is provided with an air inlet grille 136, and a baffle column 137 is provided on the side of the air inlet grille 136 facing the fan assembly 2. By providing the baffle column 137 at the air inlet grille 136, the turbulence generated in the narrow area between the air inlet grille 136 and the fan blades can be effectively disrupted. Specifically, the baffle column 137 deprives the space environment in which the turbulence that could have remained stably at this location would generate, thereby changing the direction and velocity distribution of the airflow, reducing the turbulence and swirling of the airflow in the narrow area, allowing air to be drawn into the fan more efficiently, and thus improving the performance of the entire fan system. By reducing the formation of turbulence, the baffle column 137 effectively reduces the degree of airflow turbulence, thereby reducing the friction and collision between the airflow and the fan blades, and thus significantly reducing wind noise. This not only improves the user experience, but also makes the fan quieter during operation. At the same time, the baffle column 137 also has a guiding function, guiding the airflow in the gap of the air inlet grille 136 to the center of the fan blades 22 through the wall-attachment effect. In traditional fan designs, the low rotational speed at the center of the fan blades results in a small pressure difference between this location and the external atmospheric pressure, leading to a relatively small air intake at the center. The design of the spoiler column 137 effectively solves this problem by guiding airflow, increasing the air intake at the center, resulting in a more uniform airflow distribution throughout the fan and improving its overall performance and efficiency.

[0155] In this embodiment, the spoiler column 137 is cylindrical. However, the shape of the spoiler column 137 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the spoiler column 137 can be conical, frustum-shaped, polygonal, etc.

[0156] In some embodiments, the outer diameter of the spoiler column 137 is equal to the end face diameter of the smallest end face of the fan blade 22 in the fan assembly 2. The smallest end face of the fan blade 22 is the end face of the hub 221 of the fan blade 22 facing the air inlet 14.

[0157] Since the outer diameter of the turbulence column 137 is equal to the minimum end face diameter of the fan blade 22, the cross-sectional area of ​​the flow channel remains constant after the airflow enters through the air inlet grille 136, avoiding local acceleration or deceleration caused by abrupt changes in cross-sectional area. Equal diameters mean equal cross-sectional areas. According to Bernoulli's equation and the continuity equation, consistent cross-sectional areas can homogenize the airflow velocity, reduce energy loss due to kinetic-pressure energy conversion, and improve overall airflow efficiency. Consistent cross-sectional areas allow for a smooth transition of airflow over the surface of the turbulence column 137, reducing turbulent kinetic energy, minimizing the risk of airflow separation, and further reducing energy loss. This reduction in airflow energy loss directly reduces aerodynamic noise caused by turbulent pulsation and vortex shedding. This design is more adaptable to changes in airflow velocity, maintaining high efficiency at both low speeds (silent mode) and high speeds (strong wind mode), broadening the operating range of the portable fan. This embodiment is applicable to any scenario where the minimum end face of the fan blade 22 is flat, hemispherical, or slightly curved.

[0158] Example 4

[0159] Please refer to Figures 21 and 22. Figure 21 is a first-view structural diagram of the portable fan in this embodiment; Figure 22 is a first-view structural diagram of the mounting base in this embodiment.

[0160] As shown in Figures 21 and 22, a portable fan includes: a fan housing 1; a connecting ring 2 connected to the fan housing 1; a base 3 located in the middle of the connecting ring 2 and extending towards the inside of the fan housing 1; a fan assembly 5 connected to the base 3; and a plurality of stationary blades 4, one end of any one of the stationary blades 4 being connected to the connecting ring 2 and the other end of any one of the stationary blades 4 being connected to the base 3, wherein a pressure equalization notch 6 is provided at the position where any one of the stationary blades 4 is connected to the base 3.

[0161] In this embodiment, the fan housing 1 includes an inner housing 12 and an outer housing 11, with the outer housing 11 fitted onto the inner housing 12. However, the structure of the fan housing 1 is not limited. Depending on the specific application scenario, in some embodiments, the structure of the fan housing 1 can be (but is not limited to): integral molding, splicing of half-fan housings 1, or fitting of three-fan housings 1, etc.

[0162] The connection between the fan housing 1 and the connecting ring 2 is abutment clamping. However, the connection method is not limited to this. Depending on the specific application scenario, in some embodiments, the connection method between the fan housing 1 and the connecting ring 2 is (not limited to): snap-fit, screw-fit, riveting, magnetic connection, adhesive connection or welding, etc.

[0163] In this embodiment, the fan housing 1 is a cylindrical hollow fan housing 1, with the air inlet 13 and air outlet 14 positioned opposite each other. 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 (but is not limited to): elliptical, spherical, or prismatic. In some embodiments, a handle is also fitted on the fan housing 1 for easy gripping. In some embodiments, the portable fan can be used as an independent module, with an expansion interface provided on the fan housing 1 for connecting to corresponding expansion modules.

[0164] In this embodiment, the fan housing 1 is made of plastic, which provides advantages such as lightweight, wear resistance, and corrosion resistance. However, the material of the fan housing 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the fan housing 1 can be made of metal, alloy, or other materials.

[0165] In this embodiment, the fan assembly 5 includes a fan motor 51 and fan blades 52. The fan motor 51 can be (but is not limited to): a single-phase motor, a two-phase motor, or a three-phase motor. The fan blades 52 can be axial flow blades or diagonal flow blades.

[0166] The connection between the fan assembly 5 and the base 3 is as follows: the base 3 is provided with a hollow tube 31 for connecting the fan assembly 5.

[0167] In this embodiment, the number of stationary blades 4 is 7. However, the number of stationary blades 4 is not limited to this. Depending on the specific application scenario, in some embodiments, the number of stationary blades 4 can be 2, 3, 4, 5, 6, 8, 9 or more.

[0168] In this embodiment, any one of the multiple stationary blades 4 refers to any one of them. However, it should be noted that in some embodiments, one of the multiple stationary blades 4 is also used as a wiring structure to provide a container for the wires. Due to the needs of wiring, this stationary blade 4 is larger in size and loses some of the characteristics that the stationary blade 4 in this embodiment should have. In this application scenario, the stationary blade 4 used for wiring does not belong to any one of the stationary blades 4 in this embodiment.

[0169] The above-described embodiment utilizes the design of the equalizing gap 6 to achieve circumferential adjustment of the airflow from different small air outlets 14 near the surface of the base 3. The equalizing gap 6 balances the airflow pressure difference between adjacent stationary blades 4, allowing the originally uneven airflow to be redistributed and adjusted. This not only improves the uniformity of the airflow but also makes the airflow in front of the base 3 more stable, reducing airflow turbulence caused by velocity differences. Simultaneously, the introduction of the equalizing gap 6 guides the airflow to transition smoothly across the surface of the base 3, reducing turbulence. This optimized design significantly improves the overall aerodynamic performance of the fan, enabling it to provide more efficient airflow under the same power conditions. Finally, by reducing the scale of turbulence in front of the base 3, the design of the equalizing gap 6 effectively reduces the noise generated during fan operation. By reducing turbulence and noise, the fan's performance is significantly improved, allowing users to experience a gentler, more uniform airflow.

[0170] Please refer to Figure 24, which is a schematic diagram of the second-view structure of the assembly base in this embodiment.

[0171] As shown in Figure 24, in some embodiments, the first end 41 of any stationary blade 4 bends and extends from the connecting ring 2 toward the base 3, and forms a pressure equalization notch 6 between it and the base 3.

[0172] The curved extension design of the first end 41 of the stationary blade 4 creates a rounded edge on one side of the pressure equalization gap 6. This rounded structure effectively guides the airflow through a smooth transition, preventing vortices or resistance caused by the abrupt edge when the airflow passes through the pressure equalization gap 6. The rounded edge reduces pressure loss when the airflow passes through the gap, allowing the airflow to pass through the outlet 14 area more efficiently, thereby improving the overall airflow efficiency. The rounded edge guides the airflow between adjacent stationary blades 4 to converge more smoothly, balancing the airflow velocity differences between different outlets 14 to some extent, making the airflow more evenly distributed in the area in front of the base 3, thus reducing turbulence caused by airflow velocity differences. The curved extension design of the stationary blade 4 optimizes the aerodynamic characteristics of the outlet 14 area. The rounded edge reduces airflow separation when passing through the gap, avoiding energy loss caused by airflow separation.

[0173] It should be noted that, depending on the specific application scenario, in some implementations, the shape of the equalizing gap 6 can be (but is not limited to): arc, semicircle, triangle, rectangle or other polygon, etc.

[0174] In some embodiments, the second end 42 of any stationary blade 4, which is opposite to the first end 41, extends obliquely from the base 3 toward the inner surface of the fan housing 1, such that the length of the first side 43 of any stationary blade 4 is greater than the length of the second side 44. The first side 43 is located on the side of the stationary blade 4 closest to the inner surface of the fan housing 1, while the second side 44 is connected to the surface of the base 3.

[0175] The inclined design of the second end 42 makes the first side 43 (the side closer to the inner surface of the fan housing 1) longer. Because the airflow inside the fan housing 1 rotates in a spiral motion when the fan blades rotate, the airflow near the inner surface of the fan housing 1 has a higher linear velocity, greater energy, and greater lateral kinetic energy. The longer first side 43 can contact this high-kinetic-energy airflow earlier and provides a longer guiding path. This design allows the first side 43 to better counteract and convert the lateral airflow, thereby enhancing the directional movement of the airflow when it is blown out. By optimizing the directionality of the airflow, the fan can provide a more concentrated and powerful airflow effect, improving the user experience.

[0176] Meanwhile, with the second end 42 tilted, the contact area between the stationary blade 4 and the airflow is small in the initial stage, but gradually increases as the airflow advances along the fan casing 1. This design aligns with the characteristics of the spiral airflow: high linear velocity and high energy on the outer side, and low linear velocity and low energy on the inner side. When the airflow first enters the area of ​​the stationary blade 4, the small contact area avoids significant resistance or turbulence caused by sudden large-area obstruction. The smaller contact area helps reduce airflow turbulence in the initial stage, allowing the airflow to enter the guiding area more smoothly. This reduces energy loss in the initial stage, enabling the airflow to enter the subsequent flow process more efficiently. As the airflow advances along the fan casing 1, the kinetic energy of the outer airflow, guided by the first side 43, gradually approaches that of the inner airflow. At this point, the contact area between the airflow and the stationary blade 4 gradually increases, better adapting to changes in airflow kinetic energy. The gradual increase in contact area helps to guide and rectify the airflow more effectively, reducing turbulence and energy loss caused by velocity changes. This design ensures that the airflow is properly guided and adjusted at different stages, maintaining flow stability. The inclined setting of the second end 42 can also effectively reduce the aerodynamic friction noise when the stationary blade 4 comes into contact with the airflow, making the portable fan quieter.

[0177] It should be noted that, depending on the specific application scenario, in some implementations, the second end 42 can be set horizontally, or a wedge-shaped or arc-shaped notch can be provided on the second end 42.

[0178] In some embodiments, the first side 43 is connected to the connecting ring 2, and the first side 43 extends toward the air inlet 13 of the fan housing 1 along the inner surface of the fan housing 1.

[0179] The design of the first side 43 being tightly fitted to the inner surface of the fan housing 1 reduces the gap between the stationary blades 4 and the fan housing 1. This tight connection effectively prevents airflow leakage when passing through the gap between the stationary blades 4 and the fan housing 1. Reduced airflow leakage means more airflow can be directed to the outlet 14 area, thereby improving the overall airflow efficiency of the fan. Because the first side 43 is tightly fitted to the inner surface of the fan housing 1, airflow will not generate turbulence or eddies due to excessive gaps when passing through the stationary blades 4. Turbulence and eddies are among the main sources of fan noise. By reducing these phenomena, the noise level of the fan during operation is significantly reduced. The design of the first side 43 being tightly fitted to the inner surface of the fan housing 1 enhances the structural stability of the stationary blades 4. This design reduces the vibration of the stationary blades 4 caused by airflow impact during high-speed operation.

[0180] In some embodiments, any stationary blade 4 bends and extends from the first end 41 to the second end 42, and the direction in which any stationary blade 4 bends from the first end 41 to the second end 42 is opposite to the rotation direction of the fan blade 52 of the fan assembly 5.

[0181] The bending direction of the stationary blade 4 is opposite to the rotation direction of the fan blade 52, and the movement path of the airflow passing through the rotating fan blade 52 is also opposite to the bending direction of the stationary blade 4. This allows the airflow to impact the stationary blade 4 at a larger angle when it comes into contact with it. This larger contact angle helps to guide the airflow more effectively along the surface of the stationary blade 4. The reverse bending design makes the airflow smoother when it comes into contact with the stationary blade 4, reducing turbulence and eddies caused by rapid changes in airflow direction. By reducing the occurrence of these phenomena, the noise level of the fan during operation is significantly reduced.

[0182] In some embodiments, the length of the second end 42 is greater than the length of the first end 41, and the width of any stationary blade 4 gradually decreases along the direction from the second end 42 to the first end 41. The gradual decrease in the width of the stationary blade 4 along the direction of airflow means that the distance between the base 3 and the fan housing 1 is also gradually decreasing, thereby making the airflow duct narrower and narrower.

[0183] The design of the stationary blade 4, with its width gradually decreasing from the second end 42 to the first end 41, gradually compresses the airflow as it passes through it. According to Bernoulli's principle, an increase in airflow velocity leads to a decrease in pressure, and the gradually decreasing width forces the airflow to accelerate, significantly increasing its velocity and energy at the outlet 14, thereby enhancing the fan's air pressure and delivery capacity. Simultaneously, the gradual change in the width of the stationary blade 4 allows for a smoother transition of airflow as it passes through the blades. The wider section helps collect and rectify the airflow, while the gradually narrowing section helps concentrate the airflow, reducing energy loss due to abrupt path changes. This makes the airflow more efficient, reducing energy loss caused by eddies or turbulence, and further improving the overall efficiency of the fan.

[0184] It should be noted that, depending on the specific application scenario, in some implementations, the lengths of the first end 41 and the second end 42 are equal, or the length of the first end 41 is greater than the length of the second width.

[0185] As shown in Figure 23, in some embodiments, the opening width of the equalizing gap 6 gradually increases along the air outlet direction of the fan assembly 5. The airflow blowing out from the air outlet 14 gradually decreases in velocity and gradually increases in air pressure along the air outlet direction. In conjunction with this change, the area of ​​the equalizing gap 6 also gradually increases, so that the pressure at the location of the equalizing gap 6 is kept balanced, the pressure distribution of the airflow is adjusted, the pressure difference between adjacent stationary blades 4 is balanced, and the airflow turbulence caused by velocity differences is reduced.

[0186] Please refer to Figures 25 and 26. Figure 25 is a second-view structural schematic diagram of the portable fan of this embodiment; Figure 26 is a cross-sectional schematic diagram of the portable fan of this embodiment.

[0187] As shown in Figures 25 and 26, in some embodiments, the fan housing 1 includes an outer shell 11 and an inner shell 12. A connecting ring 2 is disposed inside the outer shell 11, with one end of the connecting ring 2 abutting against the inner surface of the outer shell 11. One end of the inner shell 12 is inserted into the outer shell 11 from the first end of the outer shell 11, and the inner shell 12 is snapped into the outer shell 11. The other end of the connecting ring 2 abuts against the inner shell 12, and the outer shell 11 forms an opposing clamping on the connecting ring 2 and the inner shell 12.

[0188] The system employs a dual-effect assembly system of "abutment + snap-fit": the inner shell 12 and the outer shell 11 are quickly positioned and locked together via snap-fit, while the connecting ring 2 and the outer shell 11 are physically limited by abutment, forming a three-dimensional spatial constraint together. This assembly method breaks through the traditional screw fixing or adhesive process, reducing the overall assembly process by more than 60%. Ordinary workers can complete the core structure assembly within 30 seconds after simple training, significantly improving production line efficiency. At the same time, the threadless structure also avoids the problem of stripping threads caused by long-term use. In the innovatively designed triangular stable architecture, the outer shell 11 acts as a rigid constraint layer, applying bidirectional clamping force to the connecting ring 2 and the inner shell 12 through its inner wall, forming a mechanical interlocking effect similar to mortise and tenon joints in architecture. Vibration tests (frequency 20-200Hz) have verified that this structure reduces the displacement between components to below 0.12mm, effectively suppressing resonance phenomena.

[0189] Please refer to Figure 27, which is a schematic diagram of the outer shell structure of this embodiment.

[0190] As shown in Figure 27, in some embodiments, one end of the outer shell 11 extends radially inward to form a first stop ring 112, and the outer surface of the connecting ring 2 protrudes to form a second stop ring 21 that cooperates with the first stop ring 112.

[0191] The coordinated design of the first stop ring 112 and the second stop ring 21 precisely limits the position of the connecting ring 2 within the housing 11, preventing the connecting ring 2 from shifting or loosening during use. This limiting effect ensures the stability and reliability of the fan assembly 5. Because the connection between the connecting ring 2 and the housing 11 is more stable, the vibration energy generated during fan operation is effectively absorbed and dispersed, thereby significantly reducing the noise level.

[0192] In some embodiments, one end of the inner housing 12 abuts against the connecting ring 2, and the other end of the inner housing 12 abuts against one end of the outer housing 11. A first locking ring 121 is provided on the outer surface of the inner housing 12, and multiple claws 111 that mate with the first locking ring 121 are protruding from the inner surface of the outer housing 11. The two ends of the inner housing 12 abut against the mounting base and the end of the outer housing 11, respectively, avoiding the need for additional fasteners in traditional connection methods, thus simplifying the structure and saving space. The mating design of the first locking ring 121 and the multiple claws 111 provides a reliable locking effect, effectively preventing loosening due to vibration or impact, and improving the overall structural stability.

[0193] Example 5

[0194] Please refer to Figures 28 and 29. Figure 28 is a schematic diagram of the overall structure of the portable fan in this embodiment; Figure 29 is a cross-sectional schematic diagram of the portable fan in this embodiment.

[0195] As shown in Figures 28 and 29, a portable fan includes a fan housing 1; a mounting base 2, one end of which is connected to the fan housing 1, and the other end of which is suspended inside the fan housing 1, with a hollow tube 24 at the suspended end of the mounting base 2; a fan motor 3, which is connected to the hollow tube 24; fan blades 4, which are fitted onto the fan motor 3 with a clearance fit; and a rotating shaft 5, one end of which is inserted into the hollow tube 24 and rotatably connected to it, and the other end of which is connected to a connecting post 41 of the fan blades 4; an oil layer is coated at the connection point between the hollow tube 24 and the rotating shaft 5, and the end of the connecting post 41 connected to the rotating shaft 5 is inserted into the hollow tube 24 with a clearance fit.

[0196] In this embodiment, the fan housing 1 is a cylindrical hollow housing, with the air inlet and outlet facing each other. 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 (but is not limited to): elliptical, spherical, or prismatic. In some embodiments, a handle is also fitted on the fan housing 1 for easy gripping. In some embodiments, the portable fan can be a standalone module, and the fan housing 1 is provided with an expansion interface for connecting to corresponding expansion modules.

[0197] In this embodiment, the fan includes an inner housing 12 and an outer housing 11, with the outer housing 11 fitted onto the inner housing 12. However, the structure of the fan housing 1 is not limited. Depending on the specific application scenario, in some embodiments, the structure of the fan housing 1 can be (but is not limited to): integral molding, half-shell splicing, three-shell sleeve, etc.

[0198] In this embodiment, the fan housing 1 is made of plastic, which provides advantages such as lightweight, wear resistance, and corrosion resistance. However, the material of the fan housing 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the fan housing 1 can be made of metal, alloy, or other materials.

[0199] In this embodiment, the fan motor 3 can be (but is not limited to): a single-phase motor, a two-phase motor, or a three-phase motor. The fan blades 4 can be axial flow blades or diagonal flow blades.

[0200] In this embodiment, the mounting base 2 includes a connecting ring 21, a base 23, and multiple stationary blades 22. The connecting ring 21 is connected to the air outlet of the fan housing 1. One end of each of the multiple stationary blades 22 is connected to the connecting ring 21, and the other end is connected to the base 23. The empty pipe is connected to the base 23.

[0201] The hollow tube 24 can be integrally molded onto the base 23, or it can be manufactured in parts. When the hollow tube 24 is manufactured in parts, one end of the hollow tube 24 is provided with a connecting seat, which is connected to the base 23 by screws or snap-fit. In some embodiments, when the hollow tube 24 and the base 23 are manufactured in parts, the strength of the material used to make the hollow tube 24 is greater than the strength of the material used to make the base 23. For example, the hollow tube 24 is made of an alloy material, while the base 23 is made of plastic.

[0202] In this embodiment, the hollow tube 24 is connected to the rotating shaft 5 via a bushing 6 disposed inside the hollow tube 24. However, the connection method between the hollow tube 24 and the rotating shaft 5 is not limited to this. Depending on the specific application scenario, in some embodiments, a bearing is disposed inside the hollow tube 24, and the bearing is rotatably connected to the rotating shaft 5; or, a necking ring protrudes from inside the hollow tube 24, and the necking ring is rotatably connected to the rotating shaft 5.

[0203] In this embodiment, the oil layer refers to the lubricating protective layer formed by grease at the connection between the hollow tube 24 and the rotating shaft 5. The effect of the grease coating in the oil layer can be (but is not limited to): a uniform oil coating, oil clumps, etc.

[0204] In the above embodiment, after the connecting post 41 of the fan blade 4 is connected to the rotating shaft 5, one end of it is inserted into the hollow tube 24 and forms a clearance fit with the hollow tube 24. This design makes the connecting post 41 an effective physical barrier to the outlet of the hollow tube 24, which can significantly reduce or even block the possibility of grease leaking out of the hollow tube 24. At the same time, the connecting post 41 is inserted into the hollow tube 24 and forms a clearance fit with it. This design makes the hollow tube 24 have a radial limiting effect on the connecting post 41, which can effectively limit the radial displacement of the connecting post 41 during rotation. This avoids serious eccentric movement of the fan blade 4 when rotating at high speed and improves the stability of the fan blade rotation. Finally, since the radial movement of the connecting post 41 is effectively limited, the frictional loss between the rotating shaft 5 and the hollow tube 24 is reduced, thereby extending the service life of the rotating shaft 5 and the hollow tube 24.

[0205] As shown in Figure 30, in some embodiments, a bushing 6 is provided inside the hollow tube 24, one end of the rotating shaft 5 is inserted into the hollow tube 24 and extends out of the bushing 6, a retaining ring 52 is provided at the end of the rotating shaft 5 that extends out of the bushing 6, and an oil layer is coated between the bushing 6 and the rotating shaft 5.

[0206] In this embodiment, an annular groove 51 is provided at one end of the rotating shaft 5 that protrudes from the bushing 6, and a retaining spring 52 is provided in the annular groove 51. The outer diameter of the retaining spring 52 is larger than the inner diameter of the bushing 6, so that the rotating shaft 5 will not detach from the bushing 6 under the action of external force.

[0207] The bushing 6, acting as an intermediate support, effectively disperses the contact stress between the rotating shaft 5 and the hollow tube 24, reducing localized wear and significantly improving the rotational accuracy of the rotating shaft 5 while decreasing the probability of eccentric movement. Applying oil between the bushing 6 and the rotating shaft 5 ensures that the lubricating oil is evenly distributed on their contact surfaces, further reducing dry friction.

[0208] It is important to emphasize that, in order to reduce the probability and amplitude of eccentric movement of the rotating shaft 5, a double-sleeve 6 design is typically adopted. That is, two sleeves 6 are installed inside the hollow tube 24 to increase the restriction on the radial movement tendency of the rotating shaft 5. The reason why a single-sleeve 6 design can be used in this embodiment is mainly because the relative positional and assembly relationship between the connecting column 41 and the hollow tube 24 effectively limits the radial movement of the rotating shaft 5, thus saving the material of one rotating shaft 5 while ensuring the stability of the rotation of the rotating shaft 5 and the fan blades 4.

[0209] In some embodiments, a first sealing ring 61 is provided between the snap ring 52 and the bushing 6, and the first sealing ring 61 is sleeved on the rotating shaft 5.

[0210] The first sealing ring 61 is installed between the retaining ring 52 and the bushing 6, and is fitted onto the rotating shaft 5. It effectively seals the gap between the rotating shaft 5 and the hollow tube 24, preventing internal grease from leaking out. The sealing ring prevents external dust or impurities from entering the bushing 6, keeping the internal structure clean and avoiding equipment malfunctions caused by foreign object intrusion. Since the first sealing ring 61 is typically made of elastic material, it provides a certain buffering effect between the retaining ring 52 and the bushing 6, absorbing vibration energy and reducing vibration and noise during equipment operation.

[0211] In some embodiments, a second sealing ring 62 is provided between the connecting post 41 and the bushing 6, and the second sealing ring 62 is sleeved on the rotating shaft 5.

[0212] The second sealing ring 62 is installed between the connecting column 41 and the bushing 6, and is fitted onto the rotating shaft 5. It effectively seals the gap between the rotating shaft 5 and the hollow tube 24, preventing internal grease from leaking out. The sealing ring prevents external dust or impurities from entering the bushing 6, keeping the internal structure clean and avoiding equipment malfunctions caused by foreign object intrusion. Since the second sealing ring 62 is typically made of elastic material, it provides a certain buffering effect between the connecting column 41 and the bushing 6, absorbing vibration energy and reducing vibration and noise during equipment operation.

[0213] In some embodiments, a first sealing ring 61 and a second sealing ring 62 are respectively provided at both ends of the bushing 6, which can effectively prevent grease leakage from both ends of the bushing 6. At the same time, the first sealing ring 61 and the second sealing ring 62 also serve to limit the axial movement of the rotating shaft 5, which can effectively reduce the mechanical vibration of the rotating shaft 5 in the axial direction and make the rotation of the fan blade 4 more stable.

[0214] In some embodiments, an inclined surface 241 is provided at the end of the hollow tube 24 facing the fan blade 4. The inclined surface 241 is connected to the inner surface of the hollow tube 24 and the first end face of the hollow tube 24 facing the fan blade 4. The angle between the inclined surface 241 and the horizontal line is θ, and the value of θ ranges from 15 to 75 degrees.

[0215] The design of the inclined surface 241 effectively guides the connecting post 41 along the correct path during insertion into the hollow tube 24, reducing assembly deviations and friction. The inclined surface 241 is located at the inlet of the hollow tube 24, far from the bushing 6, and the shaft 5 is relatively long at this location. During the initial rotation of the shaft 5, eccentric movement within the allowable clearance range between the connecting post 41 and the hollow tube 24 may occur at this location. Although the amplitude of this eccentric movement is small, it can still cause friction and wear between the connecting post 41 and the hollow tube 24. By placing the inclined surface 241 at this location, the gap between the hollow tube 24 and the connecting post 41 gradually increases along the direction of the shaft 5 towards the fan blade 4. This increasing gap trend matches the amplitude of the possible eccentric movement of the connecting post 41, thereby reducing the possibility of friction between the connecting post 41 and the hollow tube 24 and lowering frictional losses.

[0216] In some implementations, the inclined surface 241 can be an arc-shaped structure.

[0217] As shown in Figure 31, in some embodiments, the length L2 of the connecting shaft extending into the hollow tube 24 is greater than the projected length L1 of the inclined surface 241 in the axial direction of the rotating shaft 5. That is, the length of the connecting shaft extending into the hollow tube 24 is sufficient to pass through the area where the inclined surface 241 is located and to insert into the area of ​​the hollow tube 24 other than the inclined surface 241.

[0218] As can be seen from the above structure, the gap between the hollow tube 24 and the connecting post 41 is initially evenly spaced along the direction from the bushing 6 to the fan blade 4, gradually increasing from the inclined surface 241. This structure provides a good limiting environment between the front end of the connecting post 41 and the hollow tube 24. The radial movement of the rotating shaft 5 does not gradually increase with the setting of the inclined surface 241, but is limited to a fixed range by the stable gap between the front end of the connecting post 41 and the hollow tube 24. At the same time, as the connecting post 41 extends towards the fan blade 4, the gap between the connecting post 41 and the hollow tube 24 increases, providing space for possible eccentric movements, minimizing friction between the hollow tube 24 and the connecting post 41, and improving the rotational stability of the fan blade 4.

[0219] In some embodiments, the fan motor 3 includes an iron core 31, which is sleeved on a hollow tube 24, and fan blades 4 are sleeved on the iron core 31 and have a clearance fit with the iron core 31. The iron core 31, sleeved on the hollow tube 24, can dissipate heat through the design of an open structure at one end of the hollow tube 24. The rotating shaft 5 and connecting column 41 rotate inside the hollow tube 24, driving the airflow inside the hollow tube 24 to flow outward, which can dissipate heat from the inside of the iron core 31, improving heat dissipation efficiency.

[0220] In some embodiments, the portable fan further includes a PCB circuit board disposed between the mounting base 2 and the iron core 31, and the PCB circuit board is sleeved on the hollow tube 24.

[0221] Placing the PCB between the mounting base 2 and the iron core 31 makes full use of the existing space and avoids additional space occupation. This design makes the entire fan structure more compact. The PCB is close to the fan motor 3 and related components, shortening the electrical connection path and reducing the possibility of signal attenuation and interference. Due to the close proximity, the wiring between the PCB and the fan motor 3 does not need to be exposed within the portable fan's airflow duct, reducing obstruction to airflow within the fan housing 1. The PCB is located in the airflow path of the fan blades 4, effectively utilizing airflow for heat dissipation. This design allows the heat generated by the circuit board to be quickly dissipated, preventing performance degradation or malfunction due to overheating.

[0222] In some embodiments, the fan motor 3 further includes a coil 32, which is disposed on the iron core 31. The PCB circuit board and the coil 32 are electrically connected through a support pin, and the stiffness of the support pin is greater than the stiffness of the wire of the coil 32.

[0223] The support pins not only serve as electrical connections but also provide mechanical support, ensuring the stability of the PCB circuit board during equipment operation and reducing vibration and noise. Since PCB circuit boards are typically thin and light, they are prone to bending or deformation under external forces. The high rigidity design of the support pins effectively supports the PCB circuit board, preventing relative movement or cracking between it and the hollow tube 24 under external forces. The rigid design of the support pins also ensures a more stable electrical connection between the PCB circuit board and the coil 32, reducing signal interference and malfunctions caused by loose connections or poor contact.

[0224] In some embodiments, an annular notch 311 is provided at the end of the iron core 31 facing the fan blade 4, and the annular notch 311 creates a gap between part of the structure of the iron core 31 and the hollow column.

[0225] The annular notch 311 provides a direct heat dissipation channel for the airflow blown out by the fan blades 4. As the airflow passes through the annular notch 311, it can more effectively carry away the heat generated during the operation of the iron core 31, thus significantly reducing the temperature of the iron core 31. Eddy currents, caused by the alternating magnetic field inside the iron core 31, generate additional heat and reduce motor efficiency. The annular notch 311 reduces the area of ​​the inner surface of the iron core 31, thereby increasing its surface resistance and reducing the intensity of the eddy currents inside the iron core 31. Simultaneously, the annular notch 311 significantly reduces this energy loss by locally cutting off the eddy current loop. The design of the annular notch 311 reduces the amount of material used in the iron core 31, thereby reducing the overall weight and making the portable fan lighter.

[0226] Please refer to Figure 32, which is a cross-sectional schematic diagram of the magnetic ring and fan blades in this embodiment.

[0227] As shown in Figure 32, in some embodiments, a magnetic ring 42 is provided inside the hub of the fan blade 4. The magnetic ring 42 is sleeved on the fan motor 3 and is in clearance fit with the fan motor 3. The axis S2 of the magnetic ring 42 coincides with the axis S1 of the rotating shaft 5.

[0228] In this embodiment, the magnetic ring 42 is a ring structure made of magnetic material. However, the structure of the magnetic ring 42 is not limited to this. Depending on the specific application scenario, in some embodiments, the magnetic ring 42 can be formed by multiple mutually spaced strip magnetic strips to form a ring structure.

[0229] In this embodiment, the magnetic ring 42 serves as the power source for the rotation of the fan blades 4, while the rotating shaft 5 is a connecting component that keeps the fan blades 4 in a stable position. The axes of both coincide, ensuring that the fan blades 4 rotate around the same axis, making the rotation of the fan blades 4 smoother and more efficient.

[0230] Example 6

[0231] Please refer to Figures 33-3. Figure 33 is a first-view structural schematic diagram of the portable fan in this embodiment; Figure 34 is a second-view structural schematic diagram of the portable fan in this embodiment; and Figure 35 is a partial exploded view of the portable fan in this embodiment.

[0232] As shown in Figure 33-3, a portable fan includes a fan housing 1; a fan assembly, which is suspended and assembled inside the fan housing 1; and a handheld part 2, which is connected to the fan housing 1. The handheld part 2 includes a front housing 21 and a rear housing 22, which are interlocked with each other. The end of the rear housing 22 that is suspended extends towards the front housing 21 to form a support platform 23, and the front housing 21 is connected to the support platform 23.

[0233] In this embodiment, the fan housing 1 is a cylindrical hollow housing, with the air inlet and outlet facing each other. 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 (but is not limited to): elliptical, spherical, or prismatic. In some embodiments, a handle is also fitted on the fan housing 1 for easy gripping. In some embodiments, the portable fan can be a standalone module, and the fan housing 1 is provided with an expansion interface for connecting to corresponding expansion modules.

[0234] In this embodiment, the fan includes an inner housing and an outer housing, with the outer housing fitted onto the inner housing. However, the structure of the fan housing 1 is not limited. Depending on the specific application scenario, in some embodiments, the structure of the fan housing 1 can be (but is not limited to): integral molding, half-shell splicing, three-shell sleeve connection, etc.

[0235] In this embodiment, the fan housing 1 is made of plastic, which provides advantages such as lightweight, wear resistance, and corrosion resistance. However, the material of the fan housing 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the fan housing 1 can be made of metal, alloy, or other materials.

[0236] In this embodiment, the fan housing 1 and the handheld part 2 are manufactured separately. The connection method between the fan housing 1 and the handheld part 2 can be: plug-in, snap-fit, screw-in, riveting, adhesive connection, welding, etc.

[0237] In some embodiments, the fan housing 1 can be integrally formed with the front housing 21 and the rear housing 22 of the handheld part 2. Specifically, the fan housing 1 is also composed of two half-housings joined together, wherein one half-housing of the fan housing 1 is integrally formed with the front housing 21, while the other half-housing of the fan housing 1 is integrally formed with the rear housing 22.

[0238] In this embodiment, the fan motor can be (but is not limited to): a single-phase motor, a two-phase motor, or a three-phase motor. The fan blades can be axial flow blades or diagonal flow blades.

[0239] In this embodiment, the rear housing 22 is provided with two rows of opposing snap-fit ​​structures, and the front housing 21 is provided with two rows of opposing claw structures that cooperate with the snap-fit ​​structures. However, the arrangement of the snap-fit ​​structures and claw structures is not limited to this. Depending on the specific application scenario, in some embodiments, the snap-fit ​​structures are provided on the front housing 21 and the claw structures are provided on the rear housing 22; or, the snap-fit ​​structures and claw structures are alternately arranged on the front housing 21 and the rear housing 22.

[0240] In this embodiment, the support platform 23 is disposed on the rear housing 22; however, the placement of the support platform 23 is not limited thereto. Depending on the specific application scenario, in some embodiments, the support platform 23 can be disposed on the front housing 21, in which case the corresponding structures of the front housing 21 and the rear housing 22 are interchanged.

[0241] In the above embodiment, the end of the rear housing 22 that is suspended extends towards the front housing 21 to form a support platform 23, and the front housing 21 is connected to the support platform 23. This design allows the battery to be more securely fixed on the support platform 23, avoiding the installation instability caused by battery exposure during the assembly of traditional half-housing units, making the assembly of the portable fan more convenient and efficient. Simultaneously, due to the support platform 23, the rear housing 22 can be placed vertically on a table, even after the battery is installed, it can still be placed vertically without tipping over. The vertically placed rear housing 22 and battery are easier to assemble, hold, and handle, further improving the assembly efficiency of the portable fan.

[0242] In some embodiments, the handheld part 2 further includes a battery assembly 4, a first support member 3 is disposed between the battery assembly 4 and the support platform 23, one end of the first support member 3 is disposed in the support platform 23, and the other end of the first support member 3 abuts against the battery assembly 4.

[0243] Please refer to Figure 36, which is a schematic diagram of the rear shell structure in this embodiment.

[0244] As shown in Figure 36, the upper surface of the support platform 23 is recessed to form a storage groove, and one end of the first support member 3 is placed in the storage groove. The other end of the first support member 3 protrudes from the support platform 23 and abuts against the battery assembly 4 to make the assembly of the battery assembly 4 more compact.

[0245] In this embodiment, the battery assembly 4 is a power supply component consisting of one or more rechargeable batteries. However, the composition of the battery assembly 4 is not limited to this. Depending on the specific application, in some embodiments, the battery assembly 4 can be a disposable battery.

[0246] One end of the first support member 3 is fixed inside the support platform 23, and the other end directly abuts against the battery assembly 4, further enhancing the stability of the battery assembly 4. This design effectively prevents the battery assembly 4 from tilting or falling off due to external forces during assembly or use, significantly improving the reliability and safety of the product.

[0247] In this embodiment, the first support member 3 is a rigid plastic, metal, or alloy component. However, the material of the first support member 3 is not limited to these. Depending on the specific application scenario, in some embodiments, the first support member 3 can be made of cushioning materials (not limited to): rubber, silicone, fabric, or paper. The design of the first support member 3 has a certain degree of elasticity or cushioning capacity, which can accommodate, to some extent, the positional deviation of the battery assembly 4 caused by manufacturing tolerances or assembly errors. This design not only improves the fault tolerance rate of assembly but also reduces the risk of assembly failure due to dimensional mismatch.

[0248] Please refer to Figure 37, which is a schematic diagram of the front shell structure of this embodiment.

[0249] As shown in Figure 37, in some embodiments, the first support member 3 is provided with an arc-shaped guide groove 31 at one end corresponding to the rear housing 22, and the rear housing 22 is provided with a rope hole 223 at the position corresponding to the arc-shaped guide groove 31.

[0250] The arc-shaped guide groove 31 provides a good guiding path for the hanging rope, effectively reducing resistance and friction during the rope insertion process, allowing the rope end to pass through the two rope holes 223 more smoothly. This design significantly improves the assembly efficiency of the hanging rope and reduces the time and effort required for manual operation. Meanwhile, in traditional designs, directly setting the rope holes 223 with arc-shaped guiding function on the shell usually requires complex molds or processing techniques, which not only increases manufacturing costs but may also lead to a decrease in the structural strength of the shell. This solution cleverly avoids this problem by placing the arc-shaped guide groove 31 and the rope holes 223 on the first support member 3 and the rear shell 22 respectively. This separate design not only reduces the processing complexity of the shell but also improves manufacturing efficiency and yield.

[0251] Please refer to Figure 38, which is a schematic diagram of the first support structure in this embodiment.

[0252] As shown in Figure 38, in some embodiments, the first support member 3 is provided with a sound receiving cavity 32, and the sound receiving cavity 32 is provided with intersecting isolation fences 33.

[0253] In this embodiment, the sound-receiving cavity 32 on the first support member 3 is located on the surface facing the battery assembly 4. However, the location of the sound-receiving cavity 32 is not limited to this. Depending on the specific application scenario, in some embodiments, the sound-receiving cavity 32 is located on the surface facing the support platform 23. Alternatively, sound-receiving cavities 32 are provided on both the surface facing the battery assembly 4 and the surface facing the support platform 23.

[0254] The design of the sound-receiving cavity 32 effectively absorbs sound wave energy, reducing the noise generated by the fan motor and fan blades. After entering the sound-receiving cavity 32, the sound waves are reflected and absorbed multiple times within the cavity, thereby weakening the propagation intensity of the sound waves and ultimately achieving noise reduction. The isolation fence 33 further enhances the sound absorption effect of the sound-receiving cavity 32. The crisscrossing fence structure divides the sound waves into multiple small areas, and through multiple reflections and diffusions, further weakens the energy of the sound waves, significantly improving the overall noise reduction effect. Simultaneously, the sound-receiving cavity 32 not only absorbs sound wave energy but also effectively mitigates vibrations generated during equipment operation. When the internal components of the portable fan vibrate, the air molecules within the sound-receiving cavity 32 are compressed and expanded due to the vibration, thereby consuming some vibration energy and reducing the vibration amplitude. The isolation fence 33 further enhances the vibration damping capability of the sound-receiving cavity 32. The interlaced structure between the fences restricts the propagation path of vibration and further consumes vibration energy through air resistance and friction, thereby significantly reducing the overall vibration amplitude of the equipment.

[0255] In some embodiments, in order to fix the first support member 3, additional positioning posts 233 are provided on the support platform 23, and the first support member 3 has multiple positioning holes 34 adapted to the positioning posts 233 at the position of the sound receiving cavity 32. The positioning holes 34 not only make the first support member 3 more stable, but also increase the effect of sound wave and vibration reflection and diffusion, thereby improving the noise reduction and shock resistance.

[0256] In some embodiments, the support platform 23 is provided with a first snap-fit ​​groove 231, and the inner surface of the front housing 21 is provided with a snap-fit ​​arc 211 that cooperates with the first snap-fit ​​groove 231. The snap-fit ​​positions of the first snap-fit ​​groove 231 and the snap-fit ​​arc 211 are offset from the snap-fit ​​positions of the front housing 21 and the rear housing 22.

[0257] In traditional shell snap-fit ​​designs, the snap-fit ​​points are usually concentrated on the same straight line, which can easily lead to stress concentration at the connection point due to external forces, thus increasing the risk of shell separation. This solution, however, creates a multi-snap-fit ​​structure by offsetting the snap-fit ​​positions of the first snap-fit ​​groove 231 and snap-fit ​​arc 211 from the conventional snap-fit ​​positions of the front shell 21 and rear shell 22. This design distributes the shell connection points in different planes, significantly improving the overall connection stability. The offset snap-fit ​​design makes the distribution of external forces at the shell connection more uniform, avoiding connection failure caused by excessive local stress. Simultaneously, when external forces are applied to the conventional snap-fit ​​positions of the front shell 21 and rear shell 22, the offset first snap-fit ​​groove 231 and snap-fit ​​arc 211 further lock the connection through internal stress, making it difficult for either the front shell 21 or the rear shell 22 to lift. This design makes it difficult for the front shell 21 and rear shell 22 to separate under stress, thus significantly improving the connection's resistance to separation.

[0258] In some embodiments, the front housing 21 extends along the direction of the rear housing 22 above the snap-fit ​​arc 211 to form a second support member 212, and the support platform 23 is provided with a support column 232 below the second support member 212, with the second support member 212 located between the support column 232 and the battery assembly 4.

[0259] In this embodiment, the end cross-sectional area of ​​the battery assembly 4 is larger than the cross-sectional area of ​​the first support member 3. Therefore, when the battery assembly 4 comes into contact with the first support member 3, part of the battery assembly 4 is exposed. To prevent the exposed battery assembly 4 from being unstable or prone to vibration due to lack of support, a second support member 212 is provided on the front housing 21.

[0260] The second support member 212 extends from the front housing 21 to the rear housing 22 and works in conjunction with the support column 232 to optimize the internal spatial layout of the housing. This design not only saves space but also makes the overall structure more compact and rational.

[0261] In some embodiments, the second support member 212 abuts against the first support member 3. After the second support member 212 abuts against the first support member 3, it effectively limits the first support member 3 in the horizontal direction, preventing lateral displacement or swaying due to external forces or vibrations. The first support member 3 is typically used to fix the battery assembly 4, and its stability directly affects the installation stability of the battery assembly 4. The limiting effect of the second support member 212 effectively prevents the battery assembly 4 from loosening or malfunctioning due to swaying of the first support member 3. Simultaneously, it also maintains a stable relative position between the rope hole 223 and the arc-shaped guide groove 31.

[0262] In some embodiments, the upper surface of the first support member 3 is flush with the highest point of the second support member 212 in the vertical direction. The flush alignment of the upper surface of the first support surface with the highest point of the second support surface ensures that the support provided by the first support member 3 and the second support member 212 to the battery assembly 4 is on the same horizontal plane, resulting in more stable support for the battery assembly 4.

[0263] In some embodiments, both the second support 212 and the support column 232 are constructed in a wedge shape. The wedge shape allows the second support 212 to be easily inserted between the battery assembly 4 and the support platform 23. Its narrow tip design reduces resistance during insertion, making assembly simpler and faster. The wedge shape gradually widens after insertion, thus forming a stable support between the battery assembly 4 and the support platform 23. This design effectively prevents the battery assembly 4 from shaking or falling off due to external forces.

[0264] It should be noted that the shape of the second support member 212 is not limited to this. Depending on the specific application scenario, in some embodiments, the second support member 212 can be (not limited to): a circular cylinder, a prism, or an elliptical structure.

[0265] Please refer to Figure 39, which is a schematic diagram of the fan housing structure in this embodiment.

[0266] As shown in Figure 39, in some embodiments, the fan housing 1 extends towards the handheld part 2 to form a fixing seat 11. The fixing seat 11 is inserted into the handheld part 2. The fixing seat 11 is provided with a first locking edge 111 and a second locking edge 112. The first locking edge 111 and the second locking edge 112 are spaced apart along the extension direction of the fixing seat 11. The handheld part 2 is snapped into the first locking edge 111 and the second locking edge 112 respectively.

[0267] By providing a first locking ridge 111 and a second locking ridge 112 on the fixed base 11, and respectively snapping them together with the handle 2, a double locking structure is formed. This design effectively prevents connection loosening due to single-point locking failure, significantly improving the stability and reliability of the connection. The two locking ridges are spaced apart along the extension direction of the fixed base 11, making the connection force more evenly distributed. When external force is applied to the fan housing 1 or the handle 2, the force can be shared by the two locking points, avoiding structural failure due to excessive force at a single point. The double locking design is equivalent to forming a double support structure between the fixed base 11 and the handle 2. This design can effectively absorb and buffer energy transfer caused by external force or vibration, reducing the relative movement between the housing and the handle 2.

[0268] In this embodiment, the first locking edge 111 includes two prisms, respectively located on the left and right sides of the fixing base 11. However, the structure of the first locking edge 111 is not limited to this. In some embodiments, the first locking edge 111 is a single-sided prism, and the first locking edge 111 and the second locking edge 112 are respectively located on the left and right sides of the fixing base 11. Alternatively, the first locking edge 111 is a ring structure, arranged around the surface of the fixing base 11.

[0269] In this embodiment, the second locking ridge 112 includes two ridges, respectively located on the left and right sides of the fixing base 11. However, the structure of the second locking ridge 112 is not limited to this. In some embodiments, the second locking ridge 112 is a single-sided ridge, and the second locking ridge 112 is located on the left and right sides of the fixing base 11. Alternatively, the second locking ridge 112 is a ring structure, arranged around the surface of the fixing base 11.

[0270] In some embodiments, the handle 2 is provided with a locking stop 221 above the first locking edge 111, and the upper surface of the first locking edge 111 abuts against the lower surface of the locking stop 221. The design of the locking stop 221 can effectively prevent the first locking edge 111 from moving upward when subjected to force, thereby preventing connection failure caused by loosening of the locking point.

[0271] The handle 2 has a second locking groove 222 at the corresponding position of the second locking edge 112, and the second locking edge 112 is disposed within the second locking groove 222. The mutual abutment of the first locking edge 111 and the locking stop edge 221 and the cooperation of the second locking edge 112 and the second locking groove 222 form a double locking structure. This design can effectively prevent the connection from loosening due to the failure of a single locking, and significantly improve the stability and reliability of the connection. The different locking methods of the first locking edge 111 and the second locking edge 112, and the locking groove having a strong positioning function, can also limit the upper and lower movement of the second locking edge 112. Since the connection method between the fixing base 11 and the handle 2 is such that the greatest external force damage comes from the outward pulling force rather than the inward pushing force, the mutual interlocking of the first locking edge 111 and the locking stop edge 221 enhances the resistance to the outward pulling force.

[0272] In some embodiments, the second snap-fit ​​slot 222 includes a first snap-fit ​​edge 222a and a second snap-fit ​​edge 222b. The width of the first snap-fit ​​edge 222a is smaller than the width of the second snap-fit ​​edge 222b. The first snap-fit ​​edge 222a is located on the side of the second snap-fit ​​edge 112 closer to the first snap-fit ​​edge 111, and the second snap-fit ​​edge 222b is located on the side of the second snap-fit ​​edge 112 away from the first snap-fit ​​edge 111. Because the first snap-fit ​​edge 222a is narrower, it provides good guidance during assembly. When the second snap-fit ​​edge 112 enters the second snap-fit ​​slot 222, the narrower first snap-fit ​​edge 222a helps with alignment, ensuring that the second snap-fit ​​edge 112 is inserted along the correct path, reducing assembly errors. Assembly personnel or automated equipment can insert the second snap-fit ​​edge 112 into the second snap-fit ​​slot 222 more quickly and accurately, thereby simplifying the assembly process and improving production efficiency. The second snap-fit ​​edge 222b is wider, providing a larger contact area and stronger support for the second snap-fit ​​edge 112, and also enhancing the locking effect of the connection to prevent the connection from loosening due to external forces.

[0273] It should be noted that any of the embodiments in this example can be implemented independently or in combination with one or more other embodiments. When implementing in combination, the combination method should not be limited to the combination methods listed in this example.

[0274] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A portable fan, wherein, include: Fan housing; A fan assembly, wherein the fan assembly is suspended and mounted within the fan housing; The fan housing has an air inlet and an air outlet opposite to the air inlet. An air inlet grille is provided at the air inlet, and a baffle column is provided on the side of the air inlet grille facing the fan assembly; or... The fan housing includes: an outer shell; a mounting base disposed within the outer shell and abutting against the inner surface of the outer shell; an inner shell, one end of which is inserted into the outer shell from the first end of the outer shell and is snap-fitted to the outer shell; the mounting base abutting against the inner shell, and the outer shell clamping the mounting base and the inner shell to create a stable abutting relationship between the mounting base and the inner shell; or... A connecting ring, connected to the fan housing; a base, located in the middle of the connecting ring and extending into the fan housing; a fan assembly connected to the base; multiple stationary blades, one end of any one of the stationary blades connected to the connecting ring, and the other end of any one stationary blade connected to the base, with a pressure-equalizing notch provided at the connection point between any one stationary blade and the base; or... The handheld part is connected to the fan housing; the handheld part includes a front housing and a rear housing, the front housing and the rear housing are snapped together, the end of the rear housing that is suspended extends towards the front housing to form a support platform, and the front housing is connected to the support platform.

2. The portable fan according to claim 1, wherein, The first end of any stationary blade bends and extends from the connecting ring toward the base, forming the pressure equalization notch between it and the base.

3. The portable fan according to claim 2, wherein, The second end of any stationary blade, which is opposite to the first end, extends obliquely from the base toward the inner surface of the fan housing, such that the length of the first side of any stationary blade is greater than the length of the second side.

4. The portable fan according to claim 3, wherein, The first side is connected to the connecting ring, and the first side extends along the inner surface of the fan housing towards the air inlet of the fan housing.

5. The portable fan according to claim 3, wherein, The stationary blade bends and extends from the first end to the second end, and the direction in which the stationary blade bends from the first end to the second end is opposite to the rotation direction of the fan blades of the fan assembly.

6. The portable fan according to claim 3, wherein, The length of the second end is greater than the length of the first end, and the width of any stationary blade gradually decreases along the direction from the second end to the first end.

7. The portable fan according to claim 1, wherein, The opening width of the pressure equalization notch gradually increases along the air outlet direction of the fan assembly.

8. The portable fan according to claim 1, wherein, The fan assembly includes a fan motor and fan blades. The fan motor is suspended and mounted inside the fan housing. The fan blades are sleeved on the rotor of the fan motor and are rotatably connected to the fan housing via a rotating shaft.

9. The portable fan according to claim 8, wherein, The fan blades include a hub and multiple moving blades, the multiple moving blades being arranged at equal intervals around the hub, and the hub having a first end face and a second end face arranged sequentially along the direction from the air inlet to the air outlet, the diameter of the first end face being smaller than the diameter of the second end face.

10. The portable fan according to claim 9, wherein, The outer diameter of the turbulence column is equal to the diameter of the first end face.

11. The portable fan according to claim 9, wherein, The first end face is arc-shaped, and the outer diameter of the turbulence column is smaller than the diameter of the first end face.

12. The portable fan according to claim 9, wherein, The straight-line distance between the suspended end of the turbulence column and the first end face is less than the diameter of the turbulence column.

13. The portable fan according to claim 7, wherein, The spoiler column has a receiving cavity inside, and the opening of the receiving cavity is located at the end of the spoiler column that is suspended.

14. The portable fan according to claim 1, wherein, The handheld part further includes a battery assembly, and a first support member is provided between the battery assembly and the support platform. One end of the first support member is disposed in the support platform, and the other end of the first support member abuts against the battery assembly.

15. The portable fan according to claim 14, wherein, The first support member has an arc-shaped guide groove at one end corresponding to the rear housing, and the rear housing has a rope-passing hole at the corresponding position of the arc-shaped guide groove; and / or, The first support member has a sound receiving cavity, and the sound receiving cavity is provided with intersecting isolation fences arranged in a longitudinal and transverse manner.

16. The portable fan according to claim 14, wherein, The support platform is provided with a first snap-fit ​​groove, and the inner surface of the front housing is provided with a snap-fit ​​arc that cooperates with the first snap-fit ​​groove. The snap-fit ​​positions of the first snap-fit ​​groove and the snap-fit ​​arc are offset from the snap-fit ​​positions of the front housing and the rear housing.

17. The portable fan according to claim 16, wherein, The front housing extends along the direction of the rear housing above the snap-fit ​​arc to form a second support member, and the support platform is provided with a support column below the second support member, with the second support member located between the support column and the battery assembly.

18. The portable fan according to claim 17, wherein, The second support member abuts against the first support member; and / or, The upper surface of the first support member is flush with the highest point of the second support member in the vertical direction; and / or, Both the second support member and the support column are constructed in a wedge shape.

19. The portable fan according to claim 1, wherein, One end of the outer casing extends radially inward to form a first stop ring, and the outer surface of the mounting base protrudes to form a second stop ring that mates with the first stop ring; and / or, A buffer is provided between the mounting base and the inner shell.

20. The portable fan according to claim 1, wherein, One end of the inner housing abuts against the mounting base, and the other end of the inner housing abuts against one end of the outer housing. A first snap ring is provided on the outer surface of the inner housing, and multiple claws that cooperate with the first snap ring are protruding on the inner surface of the outer housing.

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