Portable fan

Abstract

The utility model discloses a portable fan. The portable fan comprises an outer shell; the assembling seat is arranged in the outer shell, and the assembling seat is connected with the inner surface of the outer shell in an abutting mode; one end of the inner shell body is inserted into the outer shell body from the first end of the outer shell body, and the inner shell body is connected with the outer shell body in a buckled mode; the fan assembly is connected with the assembling seat and is suspended in the inner shell; the assembly base and the inner shell abut against each other, and the outer shell oppositely clamps the assembly base and the inner shell, so that the assembly base and the inner shell form a stable abutting relation. And a split design and a preparation process are adopted, and each part can be independently produced in a mold opening manner. Due to the split design, the structural complexity of a single component is greatly reduced, the mold development difficulty and the material forming process requirement are reduced, and therefore the production reject ratio is reduced, and the preparation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fans, in particular to a portable fan. BACKGROUND

[0002] In the hot summer, fans become essential for people to eliminate the heat. With the convenience of people's use requirements, more and more people prefer lighter and more portable fans.

[0003] In the prior art, in order to improve the air outlet effect of the portable fan, a relatively complex air duct structure is usually arranged inside the fan shell. Due to the complexity of the internal structure of the fan shell, an integral molding injection molding process or a 3D printing process is usually used for manufacturing. The above manufacturing process has complicated procedures, low production efficiency, and low product yield. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a portable fan which is manufactured and assembled in parts to reduce manufacturing difficulty and improve preparation efficiency.

[0005] The present application provides a portable fan, comprising:

[0006] an outer shell;

[0007] an assembly seat arranged in the outer shell, and the assembly seat and the inner surface of the outer shell abut each other;

[0008] an inner shell, one end of the inner shell is inserted into the outer shell from the first end of the outer shell, and the inner shell is buckled connected with the outer shell;

[0009] a fan assembly connected with the assembly seat and suspended inside the inner shell;

[0010] The assembly seat and the inner shell abut each other, and the outer shell forms a clamping relationship with the assembly seat and the inner shell, so that the assembly seat and the inner shell form a stable abutting relationship.

[0011] Optionally, the outer shell extends radially inward at one end to form a first stop ring, and the outer surface of the assembly seat is protruded to form a second stop ring matched with the first stop ring; and / or,

[0012] A buffer is arranged between the assembly seat and the inner shell.

[0013] Optionally, one end of the inner shell abuts against the assembly seat, and the other end of the inner shell abuts against the end of the outer shell, the outer surface of the inner shell is provided with a first clamping ring, and the inner surface of the outer shell is protruded to be provided with a plurality of clamping claws matched with the first clamping ring.

[0014] Optionally, a plurality of reinforcing ribs are arranged on the outer surface of the inner shell, the reinforcing ribs are parallel to the axis of the inner shell, the end of at least one of the reinforcing ribs is connected to the first clamping ring, and the at least one reinforcing rib passes through the first clamping ring and is connected to the two ends of the inner shell.

[0015] Optionally, the first clamping ring is provided with a reinforcing block at the corresponding position of the plurality of clamping claws, the reinforcing block is arranged on the opposite side of the first clamping ring from the side where the plurality of clamping claws are connected, and the reinforcing ribs on the two adjacent sides of the reinforcing block pass through the first clamping ring and are connected to the two ends of the inner shell; and / or,

[0016] The cross-sectional thickness of any one of the plurality of reinforcing ribs gradually decreases along the direction from the air inlet to the air outlet, and the cross-sectional thickness of the outer shell gradually increases along the direction from the air inlet to the air outlet.

[0017] Optionally, the assembly seat and the inner shell are provided with a first insertion structure and a second insertion structure at the position where they abut each other, the insertion depth of the first insertion structure is greater than that of the second insertion structure, and the insertion contact area of the second insertion structure is greater than that of the first insertion structure.

[0018] Optionally, the first insertion structure comprises a plurality of insertion columns and a plurality of insertion grooves arranged in pairs, the plurality of insertion columns are protrudingly arranged on the inner shell and extend towards the assembly seat, and the plurality of insertion grooves are arranged on the assembly seat.

[0019] Optionally, the second insertion structure comprises a plurality of insertion pieces and a plurality of insertion recesses arranged in pairs, the plurality of insertion pieces are protrudingly arranged on the inner shell and extend towards the assembly seat, and the plurality of insertion recesses are inwardly recessed to form the outer surface of the assembly seat.

[0020] Optionally, the inner shell is provided with an air inlet fence, and the air inlet fence is provided with a turbulence column on the side facing the fan assembly.

[0021] Optionally, the outer diameter of the turbulence column is equal to the end face diameter of the smallest end face of the fan blades in the fan assembly.

[0022] The beneficial effects of the embodiments of the present application are: by decomposing the overall structure into three independent modules of the outer shell, the inner shell and the assembly seat, adopting split design and preparation process, each component can be produced independently. Compared with the traditional integrated structure, the split design greatly reduces the structural complexity of the single component, reduces the mold development difficulty and material forming process requirements, thereby reducing the production failure rate and improving the preparation efficiency. The "abutment + buckle" dual-effect assembly system is adopted: the inner shell and the outer shell are quickly positioned and locked by the buckle, the assembly seat and the outer shell are physically limited by abutment, and the two cooperate to form three-dimensional space constraint. This assembly method breaks through the traditional screw fixing or gluing process, reduces the overall assembly process by more than 60%, and ordinary workers can complete the core structure assembly within 30 seconds after simple training, which significantly improves the production line efficiency. At the same time, the characteristics of the thread-free structure can also avoid the problem of thread sliding caused by long-term use. In the innovative design of the triangular stable architecture, the outer shell serves as a rigid constraint layer, which exerts bidirectional clamping force on the assembly seat and the inner shell through the inner wall, forming a mechanical interlocking effect similar to the building mortise and tenon. Through vibration test verification, this structure reduces the displacement between components to below 0.12mm, effectively suppressing the resonance phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0024] Figure 1 The first perspective view structural diagram of the portable fan for one specific embodiment of the present application;

[0025] Figure 2 The second perspective view structural diagram of the portable fan for one specific embodiment of the present application;

[0026] Figure 3 The cross-sectional view of the portable fan for one specific embodiment of the present application;

[0027] Figure 4 The assembly seat and inner shell structure diagram for one specific embodiment of the present application;

[0028] Figure 5 The structure diagram of the outer shell for one specific embodiment of the present application.

[0029] BRIEF DESCRIPTION OF DRAWINGS: 1, fan shell; 11, outer shell; 111, first stop ring; 112, pawl; 12, assembly seat; 121, second stop ring; 122, connecting ring; 123, base; 124, stationary blade; 125, hollow tube; 126, connecting seat; 13, inner shell; 131, first clamping ring; 132, reinforcing rib; 133, reinforcing block; 134, first plug-in structure; 134a, plug-in column; 134b, plug-in slot; 135, second plug-in structure; 135a, plug-in piece; 135b, plug-in groove; 136, air inlet fence; 137, turbulence column; 14, air inlet; 15, air outlet; 2, fan assembly; 21, fan motor; 22, fan blade; 221, hub. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the 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 intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the specification are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used in the specification are the same as those commonly understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification includes any and all combinations of one or more related listed items.

[0032] Please refer to Figure 1 and Figure 2 , Figure 1 is a first perspective view of the portable fan of the present embodiment; Figure 2 is a second perspective view of the portable fan of the present embodiment.

[0033] As Figure 1 and Figure 2As shown, a portable fan comprises: an outer shell 11; an assembly seat 12, which is arranged in the outer shell 11 and abuts 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-connected with the outer shell 11; a fan assembly 2, which is connected with the assembly seat 12 and suspended inside the inner shell 13; the assembly seat 12 abuts against the inner shell 13, and the outer shell 11 forms a clamping relationship with the assembly seat 12 and the inner shell 13, so that the assembly seat 12 and the inner shell 13 form a stable abutting relationship.

[0034] Among them, the outer shell 11, the inner shell 13 and the assembly seat 12 are collectively referred to as a fan shell 1.

[0035] The outer shell 11 in the embodiment is a cylindrical hollow shell, and the air inlet 14 and the air outlet 15 of the outer shell 11 are oppositely arranged. However, the shape of the outer shell 11 is not limited thereto, and according to different specific application scenarios, in some embodiments, the shape of the outer shell 11 can be (but not limited to): oval, spherical or prismatic. In some embodiments, a handle is also assembled on the outer shell 11 for convenient holding. In some embodiments, the portable fan can be used as an independent module, and the outer shell 11 is provided with an expansion interface for connecting a corresponding expansion module.

[0036] In the embodiment, the material of the outer shell 11 is plastic, and the outer shell 11 made of plastic has the advantages of light weight, wear resistance and corrosion resistance. However, the material of the outer shell 11 is not limited thereto, and according to different specific application scenarios, in some embodiments, the outer shell 11 can be made of metal materials, alloy materials, etc.

[0037] In the embodiment, the assembly seat 12 comprises: a connecting ring 122, a base 123 and a plurality of static vanes 124. The connecting ring 122 abuts against the inner surface of the outer shell 11 and abuts against the inner shell 13. One end of each of the plurality of static vanes 124 is connected with the connecting ring 122, and the other end is connected with the base 123. The fan assembly 2 is connected with the base 123.

[0038] The base 123 comprises: a hollow pipe 125. The hollow pipe 125 can be arranged on the base 123 by an integral molding process, or can be prepared by a split preparation method. When the hollow pipe 125 is manufactured by a split preparation process, one end of the hollow pipe 125 is provided with a connecting seat 126, and the connecting seat 126 is connected with the base 123 by screws or clamping.

[0039] The fan assembly 2 is connected with the hollow tube 125 to be suspended in the inner housing 13. The connection between the hollow tube 125 and the fan assembly 2 can be achieved by using conventional connection methods in the prior art, which will not be described herein.

[0040] The material of the assembly seat 12 in the embodiment is also plastic, which can reduce the weight of the assembly seat 12. Similarly, according to different specific application scenarios, the assembly seat 12 can be made of metal materials, alloy materials, etc. in some embodiments.

[0041] The material of the inner housing 13 in the embodiment is also plastic, which can reduce the overall weight of the portable fan. Similarly, according to different specific application scenarios, the assembly seat 12 can be made of metal materials, alloy materials, etc. in some embodiments.

[0042] The fan assembly 2 in the embodiment 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 fan blades or inclined fan blades.

[0043] The above embodiment divides the overall structure into three independent modules, i.e., the outer housing 11, the inner housing 13, and the assembly seat 12, and uses a split design and preparation process, so that each component can be produced separately. Compared with the traditional integrated structure, the split design greatly reduces the structural complexity of each component, reduces the mold development difficulty and material forming process requirements, thereby reducing the production failure rate and improving the preparation efficiency. The "abutment + buckle" dual-effect assembly system is used: the inner housing 13 and the outer housing 11 are quickly positioned and locked by buckling, and the assembly seat 12 and the outer housing 11 are physically limited by abutting, and the two cooperatively form a three-dimensional space constraint. This assembly method breaks through the traditional screw fixing or gluing process, reduces the overall assembly process by more than 60%, and ordinary workers can complete the core structure assembly within 30 seconds after simple training, which significantly improves the production line efficiency. At the same time, the threadless structure can also avoid the problem of thread slipping caused by long-term use. In the innovative design of the triangular stable architecture, the outer housing 11 serves as a rigid constraint layer, which exerts a bidirectional clamping force on the assembly seat 12 and the inner housing 13, forming a mechanical interlocking effect similar to the building mortise and tenon. The vibration test verifies that this structure reduces the displacement between components to less than 0.12 mm, effectively suppressing the resonance phenomenon.

[0044] Please refer to Figure 3 and Figure 5 , Figure 3 is a cross-sectional view of the portable fan of the embodiment; Figure 5 is a structural schematic view of the outer housing of the embodiment.

[0045] As Figure 3 andFigure 5 As shown, in some embodiments, the assembly seat 12 and the outer shell 11 are in abutment in the following manner: the outer shell 11 has a first stop ring 111 formed by extending radially inward at one end, and the assembly seat 12 has a second stop ring 121 formed by protruding outward on the outer surface.

[0046] In the present embodiment, the first stop ring 111 is formed by protruding outward on the inner surface of the outer shell 11, and the first stop ring 111 has a continuous annular structure. However, the structure of the first stop ring 111 is not limited thereto, and in some embodiments, the first stop ring 111 can be formed by a plurality of arc-shaped protrusions, with a gap between adjacent arc-shaped protrusions.

[0047] In the present embodiment, the second stop ring 121 is provided on the outer surface of the assembly seat 12. Specifically, the second stop ring 121 is provided by protruding outward on the outer surface of the connecting ring 122 of the assembly seat 12. The second stop ring 121 is formed by a plurality of arc-shaped protrusions, with a gap between adjacent arc-shaped protrusions. However, the structure of the second stop ring 121 is not limited thereto, and in some embodiments, the second stop ring 121 has a continuous annular structure.

[0048] The cooperation between the first stop ring 111 and the second stop ring 121 can accurately define the position of the assembly seat 12 within the outer shell 11, preventing the assembly seat 12 from shifting or loosening during use. This limiting effect ensures the stability and reliability of the fan assembly 2. Since the connection between the assembly seat 12 and the outer shell 11 is more stable, the vibration energy generated during fan operation is effectively absorbed and dispersed, significantly reducing the noise level.

[0049] In some embodiments, a buffer is provided between the assembly seat 12 and the inner shell 13. Vibration is generated during fan operation, especially when the fan blades rotate at high speed, which can be transmitted to the assembly seat 12 and the inner shell 13. The buffer absorbs vibration energy through its elastic properties, reducing the likelihood of vibration being transmitted to the outer shell 11 or other components. The presence of the buffer avoids hard contact between the assembly seat 12 and the inner shell 13, reducing the concentration of mechanical stress caused by vibration or impact. This design further improves the stability of the structure. The buffer can also increase the range of manufacturing tolerances for the assembly seat 12 and the inner shell 13, reducing the manufacturing precision of the assembly seat 12 and the inner shell 13.

[0050] In the present embodiment, the buffer is a silica gel ring. However, the material of the buffer is not limited thereto, and in some embodiments, the buffer can be a paper buffer ring, a fabric buffer ring, or other structures with a buffering effect, depending on the specific application scenario.

[0051] In some embodiments, the inner shell 13 is in abutment with the assembly seat 12 at one end and in abutment with the end of the outer shell 11 at the other end. The outer surface of the inner shell 13 is provided with a first clamping ring 131, and the inner surface of the outer shell 11 is provided with a plurality of clamping claws 112 that cooperate with the first clamping ring 131. The abutment of the inner shell 13 at both ends with the assembly seat 12 and the end of the outer shell 11 eliminates the need for additional fixing components in the traditional connection method, thereby simplifying the structure and saving space. The cooperation of the first clamping ring 131 and the plurality of clamping claws 112 provides reliable locking effect, effectively preventing loosening caused by vibration or impact, and improving the stability of the overall structure.

[0052] In some embodiments, the outer surface of the inner shell 13 is provided with a plurality of reinforcing ribs 132, which are parallel to the axis of the inner shell 13. At least one of the reinforcing ribs 132 is connected to the first clamping ring 131, and at least one of the reinforcing ribs 132 passes through the first clamping ring 131 and is connected to both ends of the inner shell 13. The design of the plurality of reinforcing ribs 132 on the outer surface of the inner shell 13, especially the reinforcing ribs 132 connected to or passing through the first clamping ring 131, significantly improves the overall rigidity and structural stability of the inner shell 13. The arrangement of the reinforcing ribs 132 parallel to the axis of the inner shell 13 enables it to effectively resist axial and radial deformation, avoiding distortion or bending of the inner shell 13 caused by 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 through the connection or penetration of the first clamping ring 131. The rational layout of the reinforcing ribs 132 makes the stress distribution of the inner shell 13 under external force more uniform. Especially the design of some reinforcing ribs 132 penetrating the first clamping ring 131 and connecting both ends of the inner shell 13 can evenly transmit stress from the clamping area to both ends of the inner shell 13 when stressed, avoiding stress concentration. This design significantly reduces the risk of structural fatigue and prolongs the service life of the product. The presence of the reinforcing ribs 132 can effectively absorb and disperse the energy of vibration or impact load. In particular, the design of reinforcing ribs 132 of different lengths (some connected to the first clamping ring 131 and some penetrating the first clamping ring 131 and connecting both ends) forms an interlaced support structure, further enhancing the shock resistance of the inner shell 13.

[0053] It should be further pointed out that as a medium for transmitting vibration waves from the inner shell 13 to the outer shell 11, the reinforcing ribs 132 of different lengths can transmit vibrations to different positions of the outer shell 11 when transmitting vibrations. The vibration waves at different positions interfere with each other, thereby reducing the mechanical vibration on the outer shell 11.

[0054] The reinforcing ribs 132 in the embodiment can be (but not limited to) 2, 3, 4, 5 or more.

[0055] In some embodiments, the first clamping ring 131 is provided with reinforcing blocks 133 at positions corresponding to the plurality of clamping claws 112, the reinforcing blocks 133 are arranged on the opposite side of the side where the first clamping ring 131 and the plurality of clamping claws 112 meet, and the reinforcing ribs 132 on the adjacent two sides of the reinforcing blocks 133 pass through the first clamping ring 131 and are connected to the two ends of the inner housing 13 respectively. The reinforcing blocks 133 on the first clamping ring 131 and the reinforcing ribs 132 on the adjacent two sides cooperate to further enhance the structural rigidity and stability of the inner housing 13. The reinforcing blocks 133 are located on the opposite side of the side where the first clamping ring 131 and the clamping claws 112 meet, which can effectively share the external force received by the first clamping ring 131 and evenly transmit the load to the two ends of the inner housing 13 through the reinforcing ribs 132 on the adjacent two sides. The cooperation of the reinforcing blocks 133 and the reinforcing ribs 132 enhances the anti-vibration performance of the inner housing 13. When the device is subjected to vibration or impact, the reinforcing blocks 133 can absorb part of the energy and evenly disperse the vibration load to the two ends of the inner housing 13 through the reinforcing ribs 132 on the two sides.

[0056] The reinforcing blocks 133 in the embodiment are a plurality of wedge-shaped protrusions protruding on the outer surface of the inner housing 13 and the first clamping ring 131. The number of wedge-shaped protrusions in a group can be 1, 2, 3, 4 or more.

[0057] In the embodiment, the shape of the reinforcing blocks 133 is not limited, and according to different specific application scenarios, in some embodiments, the shape of the reinforcing blocks 133 can be (but not limited to) spherical, triangular, square or other polygonal.

[0058] 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, and the cross-sectional thickness of the outer shell 11 gradually increases along the direction from the air inlet 14 to the air outlet 15. The design of the reinforcing ribs 132 gradually decreasing in cross-sectional thickness from the air inlet 14 to the air outlet 15 is complementary to 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 the air flow or external force on the inner shell 13 and the outer shell 11, so that the stress is more evenly transmitted between the inner shell 13 and the outer shell 11. In particular, at the air inlet 14, the thicker design of the reinforcing ribs 132 can withstand greater external force or air flow impact, while the thinner design of the outer shell 11 can reduce material usage and weight; while at the air outlet 15, the thinner design of the reinforcing ribs 132 reduces unnecessary material waste, while the thicker design of the outer shell 11 can provide stronger support, thereby improving the overall stability and durability of the structure. The outer shell 11 is thinner at the end where the first clamping ring 131 is arranged, and has stronger deformation ability, which makes it easier and more secure for the clamping jaw 112 to be clamped with the first clamping ring 131. At the same time, since the thickness of the outer shell 11 at the air inlet 14 is smaller, the end part is more easily in close abutment with the end part of the inner shell 13, thereby improving the tightness and sealing performance of the assembly.

[0059] The cross-sectional thickness of the outer shell 11 in the present embodiment refers to the local cross-sectional thickness at the position opposite to any one of the reinforcing ribs 132, and not the overall cross-sectional thickness of the outer shell 11.

[0060] Please refer to Figure 4 , Figure 4 for the assembly of the present embodiment and the structure of the inner shell.

[0061] As Figure 4As shown, in some embodiments, the assembly seat 12 is provided with a first insertion structure 134 and a second insertion structure 135 at the position where the assembly seat 12 and the inner shell 13 abut 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 first insertion structure 134 and the second insertion structure 135 between the assembly seat 12 and the inner shell 13 enhance the connection stability between the two through different insertion depths and contact areas. The greater insertion depth of the first insertion structure 134 ensures the firmness of the mechanical connection, effectively preventing loosening due to vibration or impact; while the greater contact area of the second insertion structure 135 improves the uniformity of the contact at the connection, reduces the occurrence of 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 makes the force transmission between the assembly seat 12 and the inner shell 13 more uniform, avoiding structural damage caused by excessive local stress, and improving the load capacity and service life of the entire 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 anti-shock and anti-impact capability between the assembly seat 12 and the inner shell 13. When the device is subjected to vibration or impact, the deeply inserted first insertion structure 134 can provide stronger fixation, while the second insertion structure 135 with wide contact area can absorb more energy, reducing the impact force transmitted to the inner shell 13, thereby protecting the internal components from damage. In addition, the second insertion structure 135 with wide contact area also helps to improve the sealing performance, preventing external dust, moisture and other factors from entering the device, and enhancing the protection capability of the device.

[0062] In some embodiments, the first insertion structure 134 includes a plurality of insertion columns 134a and a plurality of insertion slots 134b arranged in pairs, the plurality of insertion columns 134a are protrudingly arranged on the inner shell 13 and extend towards the assembly seat 12, and the plurality of insertion slots 134b are arranged on the assembly seat 12.

[0063] In this embodiment, the shape of the insertion column 134a is a cylinder. However, the shape of the insertion column 134a is not limited thereto, and in some embodiments, the insertion column 134a can be a prism according to different specific application scenarios. The corresponding insertion slot 134b is configured as a circular cavity. When the insertion column 134a is of a polygonal shape, the insertion slot 134b is correspondingly designed as a polygonal cavity corresponding to the insertion column 134a.

[0064] The number of insertion columns 134a and insertion slots 134b is (not limited to) 2, 3, 4 or more.

[0065] In some embodiments, at least part of the structure of the plug-in slot 134b is exposed on the outer surface of the assembly seat 12.

[0066] In some embodiments, the second plug-in structure 135 includes a plurality of plug-in pieces 135a and a plurality of plug-in grooves 135b arranged in pairs, the plurality of plug-in pieces 135a are protrudingly arranged on the inner housing 13 and extend towards the assembly seat 12, and the plurality of plug-in grooves 135b are recessed inwardly and formed on the outer surface of the assembly seat 12. The plurality of plug-in pieces 135a are uniformly distributed on the inner housing 13 and correspond to the plug-in grooves 135b on the assembly seat 12 one by one, forming a multi-point support structure. This design can uniformly transmit the external force acting on the inner housing 13 to the assembly seat 12, avoiding structural damage caused by excessive force acting on a single point. At the same time, the plug-in structure can effectively disperse the radial and axial loads, improving the load balancing capability of the overall structure.

[0067] The number of plug-in pieces 135a and plug-in grooves 135b is (but not limited to) 2, 3, 4 or more.

[0068] In some embodiments, the inner housing 13 is provided with an air inlet grille 136, and the air inlet grille 136 is provided with a turbulence column 137 on the side facing the fan assembly 2. By arranging the turbulence column 137 at the air inlet grille 136, the turbulent flow generated in the narrow area between the air inlet grille 136 and the fan blades can be effectively disturbed. Specifically, the arrangement of the turbulence column 137 makes the turbulent flow that can be stably retained at this position lose the space environment for generation, thereby changing the direction and speed distribution of the airflow by changing the direction and speed distribution of the airflow, reducing the turbulence and rotation of the airflow in the narrow area, and enabling the air to be more efficiently sucked into the fan, thereby improving the performance of the entire fan system. By reducing the formation of turbulent flow, the turbulence column 137 effectively reduces the degree of turbulence of the airflow, thereby reducing the friction and collision between the airflow and the fan blades, and thereby significantly reducing the wind noise. This not only improves the user experience, but also makes the fan run more quietly. At the same time, the turbulence column 137 also has the effect of guiding the flow, and the airflow in the gap of the air inlet grille 136 is guided to the center position of the fan blades 22 by the effect of the wall. In the traditional fan design, the rotational speed of the fan blades at the center position is relatively low, resulting in a too small pressure difference between the center position and the external atmosphere, thereby causing the air intake at the center position to be relatively small. The design of the turbulence column 137 effectively solves this problem by guiding the airflow, increasing the air intake at the center position, and making the airflow distribution of the entire fan more uniform, thereby improving the overall performance and efficiency of the fan.

[0069] The shape of the spoiler column 137 in the embodiment is cylindrical. However, the shape of the spoiler column 137 is not limited thereto, and in some embodiments, the shape of the spoiler column 137 can be conical, circular truncated cone, polygonal, etc. according to different specific application scenarios.

[0070] 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 blades 22 in the fan assembly 2. The smallest end face of the fan blades 22 is the end face of the fan blade hub 221 facing the air inlet 14.

[0071] Since the outer diameter of the spoiler column 137 is equal to the smallest end face diameter of the fan blades 22, after the airflow enters through the air inlet grille 136, the cross-sectional area of the flow passage remains constant, avoiding the phenomenon of local acceleration or deceleration caused by sudden changes in cross-sectional area. The diameters are equal, and the cross-sectional areas are also equal. According to Bernoulli's equation and the continuity equation, the uniform cross-sectional area can make the airflow velocity uniform, reduce the energy loss caused by kinetic energy-pressure energy conversion, and improve the overall air inlet efficiency. Through the consistency of the cross-sectional area, the airflow smoothly transitions on the surface of the spoiler column 137, reduces the turbulent kinetic energy, reduces the risk of airflow separation, and further reduces energy loss. The reduction of airflow energy loss directly reduces the aerodynamic noise caused by turbulent pulsation and vortex shedding. This design is more adaptable to changes in airflow velocity, and can maintain high efficiency at low speed (silent mode) and high speed (strong wind mode), widening the working condition use range of portable fans. The embodiment is applicable to any scenario where the smallest end face of the fan blades 22 is a plane, a hemisphere, or a poor arc, etc.

[0072] It should be noted that any one of the embodiments in the present embodiment can be independently implemented, or implemented in combination with one or more other embodiments. When combined, the combination manner should not be limited to the combination manners listed in the present embodiment.

[0073] It should be noted that the specification and drawings of the present application provide a preferred embodiment of the present application, but the present application can be implemented in many different forms, and is not limited to the embodiments described in the specification. These embodiments are not additional limitations on the content of the present application, and the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Furthermore, the above technical features continue to be combined, forming various embodiments not listed above, which are considered to be within the scope of the present application. Furthermore, for those skilled in the art, the above description can be improved or changed, and all these improvements and changes should be within the scope of the claims of the present application.

Claims

1. A portable fan characterized by, The utility model relates to a fan assembly, including: An outer shell; An assembly seat arranged in 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-connected with the outer shell; A fan assembly connected with the assembly seat and suspended inside the inner shell; The assembly seat and the inner shell abut against each other, and the outer shell forms a clamping action on the assembly seat and the inner shell, so that the assembly seat and the inner shell form a stable abutting relationship.

2. The portable fan of claim 1, wherein, The outer shell extends radially inward at one end to form a first stop ring, and the outer surface of the assembly seat is protruded to form a second stop ring matched with the first stop ring; and / or A buffer is arranged between the assembly seat and the inner shell.

3. The portable fan of claim 1, wherein, One end of the inner shell abuts against the assembly seat, and the other end of the inner shell abuts against the end of the outer shell, the outer surface of the inner shell is provided with a first clamping ring, and the inner surface of the outer shell is protruded to be provided with a plurality of clamping claws matched with the first clamping ring.

4. The portable fan of claim 3, wherein, A plurality of reinforcing ribs are arranged on the outer surface of the inner shell, and the reinforcing ribs are parallel to the axis of the inner shell, at least one end of the reinforcing ribs abuts against the first clamping ring, and at least one of the reinforcing ribs passes through the first clamping ring and is connected to the two ends of the inner shell.

5. The portable fan of claim 4, wherein, The first clamping ring is provided with a reinforcing block at the corresponding position of the plurality of clamping claws, the reinforcing block is arranged on the opposite side of the first clamping ring and the plurality of clamping claws, and the reinforcing ribs on the adjacent two sides of the reinforcing block pass through the first clamping ring and are connected to the two ends of the inner shell; and / or The cross-sectional thickness of any reinforcing rib among the plurality of reinforcing ribs gradually decreases along the direction from the air inlet to the air outlet, and the cross-sectional thickness of the outer shell gradually increases along the direction from the air inlet to the air outlet.

6. The portable fan of claim 1, wherein, The first insertion structure and the second insertion structure are arranged at the position where the assembly seat and the inner shell abut against each other, the insertion depth of the first insertion structure is greater than that of the second insertion structure, and the insertion contact area of the second insertion structure is greater than that of the first insertion structure.

7. The portable fan of claim 6, wherein, The first insertion structure includes a plurality of insertion columns and a plurality of insertion grooves arranged in pairs, the plurality of insertion columns are protruded on the inner shell and extend toward the assembly seat, and the plurality of insertion grooves are arranged on the assembly seat.

8. The portable fan of claim 6, wherein, The second insertion structure includes a plurality of insertion pieces and a plurality of insertion recesses arranged in pairs, the plurality of insertion pieces are protruded on the inner shell and extend toward the assembly seat, and the plurality of insertion recesses are recessed inward to form the outer surface of the assembly seat.

9. The portable fan of claim 1, wherein, The inner shell is provided with an air inlet fence, and the air inlet fence is provided with a turbulence column on the side facing the fan assembly.

10. The portable fan of claim 9, wherein, The outer diameter of the turbulence column is equal to the end face diameter of the smallest end face of the fan blades in the fan assembly.

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