Portable fan

Abstract

The utility model discloses a portable fan. The portable fan comprises a fan shell; the fan assembly is assembled in the fan shell, and an air inlet and an air outlet which are communicated with the fan assembly are formed in the fan shell; a plurality of first static blades are arranged in the fan assembly or on an assembling base connected with the fan assembly, and a plurality of second static blades are arranged at the position of an air outlet of the fan shell. The first stationary blade is arranged in the fan assembly or on the assembly base, and the second stationary blade is arranged at the air outlet of the fan shell, so that a two-stage stationary blade structure is formed. Due to the design of the two stages of stationary blades, airflow can be effectively guided and rectified. The first static blades can preliminarily comb airflow generated by the fan assembly, turbulent flow and vortex of the airflow are reduced, and the airflow can flow to the air outlet more stably; and the direction and speed distribution of the airflow are further optimized at the air outlet through the second stationary blades, and it is ensured that the airflow can be discharged in a more uniform and stable state.

Description

Technical Field

[0001] This application relates to the field of fans, and more particularly to a portable fan. Background Technology

[0002] 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.

[0003] In the prior art, most mainstream portable fan products (such as USB fans and handheld turbo fans) generally adopt a single-stage stator blade structure design, that is, only one set of fixed guide blades is configured at the rear end of the fan impeller. The inventors of this application discovered in their research that the single-stage stator blades are insufficient in rectifying the airflow at the outlet of a centrifugal fan, and a large amount of high-speed airflow forms a turbulent zone at the outlet due to the lack of effective guidance. This leads to low airflow efficiency and high wind noise in portable fans. Utility Model Content

[0004] The purpose of this application is to provide a portable fan with higher air output efficiency and lower wind noise.

[0005] This application provides a portable fan, including:

[0006] Fan housing;

[0007] A fan assembly, wherein the fan assembly is assembled inside the fan housing, and the fan housing has an air inlet and an air outlet that communicate with the fan assembly;

[0008] Multiple first stationary blades are provided inside the fan assembly or on the mounting base connected to the fan assembly, and multiple second stationary blades are provided at the air outlet position of the fan housing.

[0009] Optionally, the plurality of first stationary blades and the plurality of second stationary blades are arranged alternately.

[0010] Optionally, the ends of the plurality of first stationary blades and the plurality of second stationary blades that are disposed opposite to each other are aligned.

[0011] Optionally, the number of the second stationary blades is less than or equal to the number of the first stationary blades.

[0012] Optionally, each of the plurality of first stationary blades extends curvedly along the inner surface of the fan housing, the bending direction of the plurality of first stationary blades is opposite to the rotation direction of the fan blades of the fan assembly, and the curvature of the plurality of first stationary blades is greater than the curvature of the second stationary blade.

[0013] Optionally, the plurality of second stationary blades are arranged in a straight line along the direction from the air inlet to the air outlet.

[0014] Optionally, along the direction from the air inlet to the air outlet, each of the plurality of second stationary blades is provided with a first end and a second end, the width of the first end being smaller than the width of the second end, so that a pressure relief zone is formed at the air outlet location.

[0015] Optionally, the fan housing includes: a first housing and a second housing, wherein the first housing is sleeved on the second housing, and the air inlet is disposed on the second housing.

[0016] Optionally, the first housing is made of a transparent or translucent material; and / or,

[0017] Identification information is provided on the inner surface of the first housing and / or the outer surface of the second housing; and / or,

[0018] A light strip is provided on the first housing or the second housing.

[0019] Optionally, the fan housing further includes: a third housing, which is inserted into the second housing, the air outlet is disposed on the third housing, and the plurality of second stationary blades are disposed on the third housing.

[0020] The beneficial effects of this application embodiment are as follows: By setting a first stationary blade inside the fan assembly or on the mounting base, and setting a second stationary blade at the air outlet of the fan housing, a two-stage stationary blade structure is formed. The two-stage stationary blade design can effectively guide and rectify the airflow. The first stationary blade can initially streamline the airflow generated by the fan assembly, reducing turbulence and eddies, allowing it to flow more smoothly towards the air outlet; the second stationary blade further optimizes the direction and velocity distribution of the airflow at the air outlet, ensuring that the airflow is discharged in a more uniform and stable state. This two-stage guiding mechanism significantly improves the airflow efficiency and avoids disordered collisions and energy loss of the airflow within the housing. The airflow path optimized by the two-stage stationary blades greatly improves the fan's airflow efficiency, enabling it to output stronger airflow with the same energy consumption. Simultaneously, the two-stage stationary blades can effectively reduce airflow turbulence, significantly reducing the noise level during fan operation and providing users with a quieter and more comfortable user experience. Attached Figure Description

[0021] 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:

[0022] Figure 1 This is a schematic diagram of the overall structure of a portable fan according to a specific embodiment of this application;

[0023] Figure 2This is a cross-sectional schematic diagram of a portable fan according to a specific embodiment of this application;

[0024] Figure 3 This is a partially exploded view of a portable fan according to a specific embodiment of this application;

[0025] Figure 4 This is a top view schematic diagram of a portable fan according to a specific embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of the third housing according to a specific embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the structure of a motor assembly according to a specific embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the structure of a second embodiment of a portable fan according to a specific embodiment of this application.

[0029] Figure descriptions: 1. Fan housing; 11. Air inlet; 12. Air outlet; 13. First housing; 14. Second housing; 15. Third housing; 151. Second stationary blade; 151a. First end; 151b. Second end; 16. Mounting base; 2. Fan assembly; 21. Motor housing; 22. Fan motor; 23. Fan blade; 24. First stationary blade. Detailed Implementation

[0030] To facilitate understanding of this utility model, 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.

[0031] 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 invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0032] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the overall structure of the fan clamping device in this embodiment; Figure 2 This is a cross-sectional schematic diagram of the portable fan that holds the fan in this embodiment.

[0033] like Figure 1 and Figure 2 As shown, a portable fan includes: a fan housing 1; a fan assembly 2, the fan assembly 2 being assembled inside the fan housing 1, the fan housing 1 having an air inlet 11 and an air outlet 12 communicating with the fan assembly 2; a plurality of first stationary blades 24 being provided inside the fan assembly 2 or on the mounting base 16 connected to the fan assembly 2; and a plurality of second stationary blades 151 being provided at the air outlet 12 of the fan housing 1.

[0034] In this embodiment, the portable fan can be (but is not limited to): a neck fan, a waist fan, a handheld fan, a desktop fan, or a wearable fan.

[0035] The fan housing 1 in this embodiment includes a first housing 13, a second housing 14, and a third housing 15. The first housing 13 is fitted onto the second housing 14, and the third housing 15 is inserted into the second housing 14. The fan assembly 2 is connected to the third housing 15, and each air inlet opening penetrates through the first housing 13 and the second housing 14. However, the structure 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 formed by splicing two half-housings together front and back or top and bottom.

[0036] Fan assembly 2 includes a fan motor 22 and fan blades 23. The motor assembly can be (but is not limited to): a single-phase motor, a two-phase motor, or a three-phase motor. The structure of fan assembly 2 can be an external rotor or an internal rotor.

[0037] In this embodiment, the fan assembly 2 has a modular structure. Specifically, as shown below... Figure 6 As shown, the fan assembly 2 includes: a motor housing 21, a fan motor 22, and fan blades 23. The fan motor 22 and fan blades 23 are disposed within the motor housing 21, and multiple first stationary blades 24 are also disposed within the motor housing 21. However, the structure of the fan assembly 2 is not limited to this; depending on the specific application scenario, such as... Figure 7 As shown, in some embodiments, the fan assembly 2 includes a fan motor 22 and fan blades 23. A mounting base 16 is provided inside the fan housing 1, the fan motor 22 is connected to the mounting base 16, the fan blades 23 are connected to the fan motor 22, and a plurality of first stationary blades 24 are connected between the fan housing 1 and the mounting base 16.

[0038] In this embodiment, the number of the first stationary blades 24 is (not limited to) 2, 3, 4, 5, 6, 7 or more.

[0039] In this embodiment, the number of second stationary blades 151 is (not limited to) 2, 3, 4, 5, 6, 7 or more.

[0040] It should be noted that in some embodiments, one of the multiple first stationary blades 24 is also used as a conduit for the conductors in the wiring structure. Due to the needs of wiring, the first stationary blade 24 is relatively large and loses some of the features of the first stationary blade 24 in this embodiment. When the stationary blade loses all the features of the first stationary blade 24 defined in this embodiment, the stationary blade does not belong to the first stationary blade 24 defined in this embodiment. When the stationary blade has some or all of the features of the first stationary blade 24, then the stationary blade is defined as belonging to the first stationary blade 24 in the embodiment with the corresponding features.

[0041] In some embodiments, one of the plurality of second stationary blades 151 is also used as a conduit for the conductors in the wiring structure. Whether it belongs to the second stationary blade 151 referred to in this embodiment should be determined using the method described above for determining the first stationary blade 24. Further details will not be provided here.

[0042] In the above embodiment, a two-stage stationary blade structure is formed by setting a first stationary blade 24 inside the fan assembly 2 or on the mounting base 16, and a second stationary blade 151 at the air outlet 12 of the fan housing 1. The two-stage stationary blade design effectively guides and rectifies the airflow. The first stationary blade 24 initially streamlines the airflow generated by the fan assembly 2, reducing turbulence and eddies, allowing it to flow more smoothly towards the air outlet 12. The second stationary blade 151 further optimizes the direction and velocity distribution of the airflow at the air outlet 12, ensuring that the airflow is discharged in a more uniform and stable state. This two-stage guiding mechanism significantly improves the flow efficiency of the airflow and avoids disordered collisions and energy loss of the airflow within the housing. The optimized airflow path through the two-stage stationary blades greatly improves the fan's output efficiency, enabling it to output stronger airflow with the same energy consumption. Simultaneously, the two-stage stationary blades effectively reduce airflow turbulence, significantly lowering the noise level during fan operation and providing users with a quieter and more comfortable user experience.

[0043] Please see Figure 3 and Figure 4 , Figure 3 This is a partially exploded view of the portable fan in this embodiment; Figure 4 This is a top view of the portable fan in this embodiment.

[0044] like Figure 3 and Figure 4 As shown, in some embodiments, a plurality of first stationary blades 24 and a plurality of second stationary blades 151 are arranged alternately.

[0045] Two sets of stationary blades are arranged in a non-parallel, staggered pattern in three-dimensional space, forming a two-stage flow guide interface. Multiple first stationary blades 24 and multiple second stationary blades 151, each along its own axial dimension, divide the airflow channel into multiple micro-flow channels. Because the multiple first stationary blades 24 and multiple second stationary blades 151 are staggered, the micro-flow channels they form are also staggered. The micro-flow channels formed by the second stationary blades 151 can receive airflow transported by the micro-flow channels formed by two or more first stationary blades 24. This structure forces the airflow to change direction a second time, similar to the flow splitting principle of a honeycomb structure. By restricting the airflow's degrees of freedom, it promotes the homogenization of the velocity field. The first-stage and second-stage blades are located in different axial planes, forming an orthogonal flow guide network. This achieves a more refined segmentation of the airflow in the axial wind direction, without reducing the space for airflow, increasing airflow velocity, causing a sharp drop in airflow pressure, or creating wind blades that cause user discomfort during the segmentation process. The above structure can achieve two-stage division of axial airflow without reducing airflow pressure, making the airflow velocity more uniform and the airflow coverage wider. It perfectly solves the drawbacks of portable fans that are small in size, close to the human body, and have a concentrated airflow position and small coverage area when the airflow velocity is too fast.

[0046] In some embodiments, the opposite ends of the plurality of first stationary blades 24 and the plurality of second stationary blades 151 are aligned with each other.

[0047] The second stationary blade 151 extends the first stationary blade 24 axially, and the ends of the two blades are aligned to form a continuous flow channel. After the airflow completes initial rectification by the first stationary blade 24, it undergoes secondary guidance through the axially extended second stationary blade 151, forming a longer flow-guiding and stabilizing path. Compared with the traditional single-stage stationary blade structure, the airflow has a longer flow time in the flow-guiding path, more sufficient momentum exchange, less spiral kinetic energy in the airflow, and better blowing effect.

[0048] In some embodiments, the number of second stationary blades 151 is less than or equal to the number of first stationary blades 24.

[0049] When the ends of the multiple first stationary blades 24 and the multiple second stationary blades 151 that are arranged opposite to each other are aligned, the number of second stationary blades 151 is equal to the number of first stationary blades 24.

[0050] When multiple first stationary blades 24 and multiple second stationary blades 151 are arranged alternately, the number of second stationary blades 151 is less than or equal to the number of first stationary blades 24.

[0051] When the number of second stationary blades 151 is equal to the number of first stationary blades 24, the airflow moves from the position of the first stationary blade 24 to the position of the second stationary blade 151. The flow space does not decrease due to the change in position, and the airflow is more stable. When the airflow passes through the two sets of blades in sequence, the velocity field and pressure field are precisely coupled.

[0052] When the number of second stationary blades 151 is less than the number of first stationary blades 24, the airflow moves from the location of the first stationary blades 24 to the location of the second stationary blades 151. This increases the flow space, and the second stationary blades 151 depressurize the airflow, reducing the pressure on the airflow, increasing the pressure of the passing airflow itself, and reducing the velocity of the outflowing airflow. This enhances the diffusion capacity of the airflow and provides wider coverage. This further solves the drawbacks of portable fans, such as small size, close proximity to the human body, and concentrated airflow with a small coverage area when the airflow is too fast.

[0053] In some embodiments, each of the plurality of first stationary blades 24 extends curvedly along the inner surface of the fan housing 1, the bending direction of the plurality of first stationary blades 24 is opposite to the rotation direction of the fan blades 23 of the fan assembly 2, and the curvature of the plurality of first stationary blades 24 is greater than the curvature of the second stationary blade 151.

[0054] In this embodiment, the bending direction of the first stationary blade 24 being opposite to the rotation direction of the fan blade 23 means that the bending direction of the first stationary blade 24 is opposite to the rotation direction of the fan blade 23, and is not limited to the specific embodiment where the bending direction of the first stationary blade 24 is 180° to the rotation direction of the fan blade 23. In some embodiments, when the extension line of the bending of the first stationary blade 24 forms an obtuse angle with the rotation direction of the fan blade 23, it is also within the scope of the opposite definition in this embodiment.

[0055] The bending direction of the first stationary blade 24 is opposite to the rotation direction of the fan blade 23. When the fan blade 23 rotates, it will drive the airflow to rotate in the same direction. At this time, the bending direction of the first stationary blade 24 is opposite to the rotation direction of the airflow. When the airflow rotates, it comes into contact with the curved part of the first stationary blade 24. Since the directions are opposite, the angle between the airflow and the curved part of the first stationary blade 24 is greater than 90 degrees. The airflow comes into contact with the first stationary blade 24 at a larger angle, which can reduce the kinetic energy loss of the airflow when contacting the first stationary blade 24. During the larger angle contact process, the guiding effect of the first stationary blade 24 on the airflow is obvious, the energy loss is small, and the air outlet efficiency is greatly improved.

[0056] The first stationary blade 24 extends along the shell in a curved direction opposite to the fan blade's rotation direction. This design converts the outward centrifugal airflow generated by the fan blade's rotation into axial thrust through centrifugal force compensation. The high-curvature blade increases the contact arc length between the airflow and the blade, accelerating swirling attenuation through frictional shearing. The second stationary blade 151 employs a low-curvature design, forming a gentle guiding path. Its function is similar to a "swirling filter," providing secondary guidance to the initially rectified airflow and suppressing the further development of residual swirling. With two stages of stationary blades, the first stationary blade 24 guides the airflow and converts energy, while the second stationary blade 151 stabilizes the converted airflow. Ultimately, this gives the outflowing air a stable directional projection capability, enhancing the air delivery capacity.

[0057] In some embodiments, a plurality of second stationary blades 151 are arranged in a straight line along the direction from the air inlet 11 to the air outlet 12.

[0058] The second stationary blade 151 is set in a straight line, meaning that the curvature of the second stationary blade 151 is 0. The straight blade extends along the direction from the air inlet 11 to the air outlet 12, and acts as a vector guide to straighten the quasi-axial airflow after the first stage of treatment, ensuring that the kinetic energy is output along the shortest path.

[0059] It should be noted that the curvature of the second stationary blade 151 is not limited to 0. In some embodiments, the curvature of the second stationary blade 151 is between 0 and the curvature of the first stationary blade 24.

[0060] In some embodiments, along the direction from the air inlet 11 to the air outlet 12, each of the plurality of second stationary blades 151 is provided with a first end 151a and a second end 151b, the width of the first end 151a being smaller than the width of the second end 151b, so that a pressure relief zone is formed at the air outlet 12.

[0061] The second stationary blade 151 adopts a gradually expanding variable cross-section design (width of the first end 151a < width of the second end 151b), forming a gradient pressure relief channel at the air outlet 12. When the airflow passes through the gradually widening channel, it follows the pressure-velocity conversion law in fluid mechanics. The high-speed airflow automatically decelerates and diffuses laterally in the expansion section. The pressure relief zone causes the airflow to expand autonomously along the blade width direction, forming a fan-shaped covering flow field, thus expanding the effective air delivery angle. The negative pressure adsorption effect formed by the gradually expanding blade converts some axial kinetic energy into lateral momentum, breaking the traditional single-direction airflow jet mode of straight blades. This makes the airflow coverage wider and further solves the drawbacks of portable fans, such as small size, close proximity to the human body, concentrated airflow position, and small coverage area when the airflow speed is too high.

[0062] In some embodiments, the fan housing 1 includes a first housing 13 and a second housing 14, the first housing 13 being sleeved on the second housing 14, and the air inlet 11 being disposed on the second housing 14.

[0063] The fan housing 1 is configured as a first housing 13 and a second housing 14, with the first housing 13 fitted over the second housing 14. This connection structure creates a double-layer structure at the fitting position of the first housing 13 and the second housing 14. The second housing 14 is enclosed by the first housing 13, resulting in a larger connection area and a more stable connection between the two housings. Simultaneously, the double-layer structure provides stronger drop resistance and protection, better protecting internal functional components such as the fan motor 22.

[0064] In some embodiments, the first housing 13 is made of a transparent or translucent material.

[0065] In some embodiments, the first housing 13 is made of a transparent or translucent material. The materials used to make the first housing 13 include (but are not limited to): transparent plastic materials such as polystyrene, polymethyl methacrylate, polycarbonate, polyethylene terephthalate, transparent nylon, and AS (acrylonitrile-styrene copolymer); tempered glass; quartz; artificial optical crystals; and sapphire.

[0066] The first housing 13 is made of a transparent or semi-transparent material, giving the fan housing 1 an overall transparent appearance and greatly enhancing the aesthetics of the portable fan. The first housing 13 forms a physical barrier through its sleeve structure, effectively preventing direct damage to the second housing 14 from external dust, liquid splashes, or mechanical impacts. Simultaneously, the first housing 13 reduces the oxidation effect of ultraviolet radiation on the material of the second housing 14, extending its color stability. The transparent or semi-transparent material allows the color or texture of the second housing 14 to be seen through the first housing 13, creating a sense of visual depth. For example, if the second housing 14 uses a metallic color or gradient coating, it can maintain its brightness for a long time under the protection of the first housing 13, avoiding fading or wear caused by direct exposure.

[0067] In some implementations, the transparent shell itself can be treated with processes such as frosting, gloss, raised edges, anti-slip, and partial hollowing to enhance its texture and suit the aesthetic needs of different users.

[0068] In some embodiments, identification information is provided on the inner surface of the first housing 13 and / or the outer surface of the second housing 14.

[0069] Identification information includes: specific fonts or patterns that have an indicative function, such as trademarks, logos, and product names, as well as decorative elements such as pictures, gradient layers, decals, and mirrors.

[0070] The identification information is applied to the inner surface of the first housing 13, the outer surface of the second housing 14, or the inner surface of the first housing 13 and the outer surface of the second housing 14 through processes such as (but not limited to) electroplating, spraying, pasting, painting, etc.

[0071] The identification information is set on the inner surface of the first housing 13, the outer surface of the second housing 14, or both the inner surface of the first housing 13 and the outer surface of the second housing 14. Since the relative positions of the first housing 13 and the second housing 14 do not change, the first housing 13 protects the identification information during daily use, preventing damage or wear and tear, thus preserving the information for a long time. Simultaneously, the first housing 13 is made of a transparent or semi-transparent material, allowing users to see the identification information through it, further enhancing the aesthetics of the portable fan.

[0072] In some embodiments, by utilizing the thickness and transparency or translucency of the first housing 13, marking information is simultaneously applied to the outer surface and inner surface of the first housing 13 and / or the outer surface of the second housing 14 to create a sense of depth. For example, this creates a 3D visual effect.

[0073] In some embodiments, a light strip is provided on the first housing 13 or the second housing 14. The light strip passes through the second housing 1412 and is electrically connected to the battery inside the portable fan. The light strip enables the portable fan to provide illumination. Furthermore, in nighttime environments, the illuminated light strip makes the markings more visually appealing, enhancing the overall aesthetics of the portable fan.

[0074] In some embodiments, sand, glitter, water, and vegetable oil can be disposed between the first housing 13 and the second housing 14 to enhance the aesthetics of the portable fan housing 1.

[0075] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of the third housing in this embodiment.

[0076] like Figure 5 As shown, in some embodiments, the fan housing 1 further includes: a third housing 15, which is inserted into the second housing 14, an air outlet 12 is disposed on the third housing 15, and a plurality of second stationary blades 151 are disposed on the third housing 15.

[0077] The connection method between the third housing 15 and the second housing 14 (not limited to): one or more of the following connection methods: interference fit, snap-fit ​​connection, screw connection, adhesive connection, etc.

[0078] A third housing 15 is provided to accommodate the functional components of the portable fan, including (but not limited to) a switch, display, fan assembly 2, battery assembly, or PCB circuit board. The third housing 15 allows some functional components to be pre-assembled within it before assembling the third housing 15 and the second housing 14. This avoids directly assembling the functional components within the second housing 14, reducing assembly complexity.

[0079] The third housing 15 also provides support for the second housing 14 and the first housing 13, giving the fan housing 1 stronger resistance to compression and impact. The assembly structure of the three housings not only improves the physical resistance of the fan housing 1, but also enhances its aesthetics.

[0080] In some embodiments, the third housing 15 can be simplified to a cover plate that covers the second housing 14, with only the portion for connection to the second housing 14 inserted into the second housing 14.

[0081] In this embodiment, the insertion of the third housing 15 into the second housing 14 means that at least a portion of the structure in the third housing 15 extends into the second housing 14.

[0082] 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.

[0083] 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 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, characterized in that, include: Fan housing; A fan assembly, wherein the fan assembly is assembled inside the fan housing, and the fan housing has an air inlet and an air outlet that communicate with the fan assembly; Multiple first stationary blades are provided inside the fan assembly or on the mounting base connected to the fan assembly, and multiple second stationary blades are provided at the air outlet position of the fan housing.

2. The portable fan according to claim 1, characterized in that, The plurality of first stationary blades and the plurality of second stationary blades are arranged alternately.

3. The portable fan according to claim 1, characterized in that, The ends of the plurality of first stationary blades and the plurality of second stationary blades that are disposed opposite to each other are aligned.

4. The portable fan according to claim 2 or 3, characterized in that, The number of the second stationary blades is less than or equal to the number of the first stationary blades.

5. The portable fan according to claim 1, characterized in that, Each of the plurality of first stationary blades extends in a curved manner along the inner surface of the fan housing. The curvature of the plurality of first stationary blades is opposite to the rotation direction of the fan blades of the fan assembly. The curvature of the plurality of first stationary blades is greater than that of the second stationary blades.

6. The portable fan according to claim 5, characterized in that, The plurality of second stationary blades are arranged in a straight line along the direction from the air inlet to the air outlet.

7. The portable fan according to claim 5, characterized in that, Along the direction from the air inlet to the air outlet, each of the plurality of second stationary blades is provided with a first end and a second end, the width of the first end being smaller than the width of the second end, so that a pressure relief zone is formed at the air outlet location.

8. The portable fan according to claim 1, characterized in that, The fan housing includes a first housing and a second housing, wherein the first housing is fitted onto the second housing, and the air inlet is disposed on the second housing.

9. The portable fan according to claim 8, characterized in that, The first housing is made of a transparent or translucent material; and / or, Identification information is provided on the inner surface of the first housing and / or the outer surface of the second housing; and / or, A light strip is provided on the first housing or the second housing.

10. The portable fan according to claim 8, characterized in that, The fan housing further includes: a third housing, which is inserted into the second housing, the air outlet is disposed on the third housing, and the plurality of second stationary blades are disposed on the third housing.

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