Portable fan

Abstract

The present application relates to the technical field of fans, in particular to a portable fan. The portable fan provided by the present application comprises a fan assembly, the fan assembly axially supplying air from back to front. The fan assembly comprises: a rotary base, which is provided with radially enlarged parts from back to front; and a plurality of fan blades, which are distributed at intervals on a surface of the rotary base and spirally extend from back to front, wherein the surface of the rotary base protrudes in a radial direction, and is a cambered surface from back to front. An airflow is more effectively guided by means of a relatively smooth arc shape, thereby reducing the loss of the airflow during transfer, and increasing the amount of transferred air.

Description

portable fan

[0001] This application claims priority to Chinese applications with application numbers CN2024203617731, CN2024203671030 and CN2024102116947 filed on February 26, 2024, and claims priority to Chinese applications with application numbers CN202423003786.0, CN202423009295.7, CN202423018297.2, CN202423006510.8, CN202423000925.4, CN202423009151.1 and CN202411781987.5 filed on December 5, 2024, and the entire contents of the above applications are incorporated herein by reference. Technical Field

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

[0003] With the continuous development of electronic technology and the growing demand for portable devices by consumers, new requirements are also put forward for portable fans.

[0004] Existing portable fans are generally axial-flow fans, featuring a simple structure and ease of manufacture. However, with technological advancements, some portable fans have emerged that utilize turbine-driven, highly efficient airflow. These fans offer high efficiency, low noise, and comfort, and have become increasingly popular with users. However, some of these turbine-driven portable fans suffer from unnatural surface transitions, increasing resistance and resulting in air loss across the fan surface. Summary of the Invention

[0005] The main purpose of the present application is to provide a portable fan, which is provided with a surface of a rotating seat that protrudes radially and is curved from back to front in the direction in which the radial radius of the rotating seat gradually increases, so that the surface of the rotating seat of the fan assembly, i.e., the wind guide surface, can present an arc-shaped transition, so that the wind guide surface can transition smoothly, reduce the separation of the wind flow on the wind guide surface, avoid the wind flow from staying in depressions or corners and the resistance to the wind flow caused by depressions or corners, thereby achieving more effective guidance of the wind flow through a smoother arc shape, reducing the loss of the wind flow during transmission, and increasing the amount of air delivered. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] This application will illustrate the embodiments with reference to the accompanying drawings. The drawings in this application are only used to describe the embodiments for illustrative purposes. Without departing from the principles of this application, those skilled in the art can easily make other embodiments according to the steps described below by following the description.

[0007] Option 1

[0008] FIG1-1 is a schematic diagram of the three-dimensional structure of the fan assembly provided in the first embodiment of the present application.

[0009] FIG1-2 is a side view 1 of the fan assembly provided in the first embodiment of the present application.

[0010] FIG1-3 is a second side view of the fan assembly provided in the first embodiment of the present application.

[0011] 1-4 are schematic cross-sectional views of a fan assembly according to a first embodiment of the present application.

[0012] FIG1-5 is a third side view of the fan assembly provided in the first embodiment of the present application.

[0013] 1-6 are rear views of the fan assembly provided in the first embodiment of the present application.

[0014] 1-7 are schematic diagrams of the three-dimensional structure of a portable fan provided in the second embodiment of the present application.

[0015] 1-8 are schematic cross-sectional views of the blade assembly of the portable fan provided in the second embodiment of the present application.

[0016] Option 2

[0017] FIG2-1 is a schematic diagram of the three-dimensional structure of the motor provided in the first embodiment of the present application.

[0018] Figure 2-2 is a schematic diagram of the exploded structure of the motor provided in the first embodiment of the present application.

[0019] 2-3 are schematic cross-sectional views of the stator assembly and magnets of the motor provided in the first embodiment of the present application.

[0020] 2-4 are front views of the stator assembly, boss, and bearing assembly of the motor provided in the first embodiment of the present application.

[0021] 2-5 are schematic cross-sectional views of the motor according to the first embodiment of the present application.

[0022] 2-6 are schematic diagrams of the three-dimensional structure of a portable fan provided in the second embodiment of the present application.

[0023] 2-7 are schematic diagrams of a partial cross-sectional structure of a portable fan provided in the second embodiment of the present application.

[0024] Option 3

[0025] Figure 3-1 is a schematic diagram of the three-dimensional structure of the fan blade assembly provided in the first embodiment of the present application.

[0026] Figure 3-2 is a cross-sectional schematic diagram of the fan blade assembly provided in the first embodiment of the present application.

[0027] Figure 3-3 is a schematic diagram of the exploded structure of the fan blade assembly provided in the first embodiment of the present application.

[0028] 3-4 are schematic cross-sectional views of the fan assembly of the fan blade assembly provided in the first embodiment of the present application.

[0029] 3-5 are schematic cross-sectional views of the pressure member of the fan blade assembly provided in the first embodiment of the present application.

[0030] 3-6 are schematic cross-sectional views of a partial structure of the fan blade assembly provided in the first embodiment of the present application.

[0031] Figure 3-7 is an enlarged view of A in Figure 3-2.

[0032] 3-8 are schematic diagrams of the three-dimensional structure of a portable fan provided in the second embodiment of the present application.

[0033] Option 4

[0034] FIG4-1 is a schematic diagram of the three-dimensional structure of the portable fan provided in the first embodiment of the present application.

[0035] FIG4-2 is a schematic diagram of the exploded structure of the portable fan provided in the first embodiment of the present application.

[0036] FIG4-3 is a schematic diagram of the exploded structure of the bracket and the connecting base of the portable fan provided in the first embodiment of the present application.

[0037] FIG4-4 is a first schematic cross-sectional view of a partial structure of a portable fan provided in the first embodiment of the present application.

[0038] 4-5 is a second schematic cross-sectional view of a portion of the structure of the portable fan provided in the first embodiment of the present application.

[0039] 4-6 are schematic diagrams of the exploded structure of the bracket of the portable fan provided in the first embodiment of the present application.

[0040] 4-7 are schematic cross-sectional views of the motor assembly and fan assembly of the portable fan provided in the first embodiment of the present application.

[0041] Plan 5

[0042] FIG5-1 is a schematic diagram of the three-dimensional structure of the pressure member provided in the first embodiment of the present application.

[0043] FIG5-2 is a first schematic cross-sectional view of the pressure member provided in the first embodiment of the present application.

[0044] FIG5-3 is a second schematic cross-sectional view of the pressure member provided in the first embodiment of the present application.

[0045] FIG5-4 is a side view of the pressure member provided in the first embodiment of the present application.

[0046] Figure 5-5 is a schematic diagram of the three-dimensional structure of the portable fan provided in the second embodiment of the present application.

[0047] 5-6 are schematic cross-sectional views of the blade assembly of the portable fan provided in the second embodiment of the present application.

[0048] Plan 6

[0049] Figure 6-1 is a schematic diagram of the three-dimensional structure of the fan blade assembly provided in the first embodiment of the present application.

[0050] Figure 6-2 is a cross-sectional schematic diagram of the fan blade assembly provided in the first embodiment of the present application.

[0051] Figure 6-3 is a schematic diagram of the exploded structure of the fan blade assembly provided in the first embodiment of the present application.

[0052] Figure 6-4 is an enlarged view of A in Figure 6-2.

[0053] Figure 6-5 is a cross-sectional schematic diagram of the pressure member of the fan blade assembly provided in the first embodiment of the present application.

[0054] Figure 6-6 is a schematic structural diagram of the pressure member of the fan blade assembly provided in the first embodiment of the present application.

[0055] 6-7 are schematic structural diagrams of the fan assembly of the fan blade assembly provided in the first embodiment of the present application.

[0056] Figure 6-8 is a second cross-sectional schematic diagram of the fan blade assembly provided in the first embodiment of the present application.

[0057] Figure 6-9 is an enlarged view of B in Figure 6-8.

[0058] 6-10 are schematic diagrams of the three-dimensional structure of the portable fan provided in the second embodiment of the present application.

[0059] Plan 7

[0060] FIG7-1 is a schematic diagram of the three-dimensional structure of the fan blade assembly provided in the first embodiment of the application.

[0061] Figure 7-2 is a cross-sectional schematic diagram of the fan blade assembly provided in the first embodiment of the application.

[0062] Figure 7-3 is a schematic diagram of the exploded structure of the fan blade assembly provided in the first embodiment of the application.

[0063] FIG7-4 is a schematic cross-sectional view of a partial structure of the fan blade assembly provided in the first embodiment of the application.

[0064] Figure 7-5 is an enlarged view of A in Figure 7-4.

[0065] FIG7-6 is a first structural diagram of the fan assembly of the fan blade assembly provided in the first embodiment of the application.

[0066] Figure 7-7 is a second structural schematic diagram of the fan assembly of the fan blade assembly provided in the first embodiment of the application.

[0067] 7-8 are schematic cross-sectional views of the fan assembly of the fan blade assembly provided in the first embodiment of the application.

[0068] 7-9 are rear views of the fan assembly of the fan blade assembly provided in the first embodiment of the present invention.

[0069] 7-10 are schematic structural diagrams of the pressure member of the fan blade assembly provided in the first embodiment of the application.

[0070] Figure 7-11 is a schematic cross-sectional view of the pressure member of the fan blade assembly provided in the first embodiment of the application.

[0071] Figure 7-12 is a second schematic cross-sectional view of the pressure member of the fan blade assembly provided in the first embodiment of the application.

[0072] 7-13 are schematic diagrams of the three-dimensional structure of the portable fan provided in the second embodiment of the application.

[0073] Plan 8

[0074] FIG8-1 is a three-dimensional diagram of the portable fan of the present application.

[0075] Figure 8-2 is a schematic diagram of the exploded view of the portable fan of the present application.

[0076] FIG8-3 is a cross-sectional view of the portable fan of the present application.

[0077] FIG8-4 is an exploded sectional view of the portable fan of the present application.

[0078] FIG8-5 is a cross-sectional view of the air outlet portion of the portable fan of the present application when viewed from above.

[0079] FIG8-6 is a first exploded view of the air outlet portion of the portable fan of the present application.

[0080] FIG8-7 is a second exploded view of the air outlet portion of the portable fan of the present application.

[0081] Figure 8-8 is a three-dimensional view of the handheld portion of the portable fan of the present application.

[0082] 8-9 are three-dimensional views of the portable fan blade assembly of the present application.

[0083] 8-10 are exploded views of the portable fan blade assembly of the present application.

[0084] 8-11 are cross-sectional views of the portable fan blade assembly of the present application.

[0085] 8-12 are three-dimensional views of the portable fan impeller of the present application. DETAILED DESCRIPTION

[0086] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0087] The terms "first," "second," and the like in this application are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0088] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0089] Option 1

[0090] Please refer to Figure 1-1. The first embodiment of this scheme provides a fan assembly 10 that delivers air axially from back to front, including: a rotating base 11, which has a radially enlarged portion from back to front; a plurality of fan blades 12, which are spaced apart on the surface of the rotating base 11 and extend spirally from back to front; wherein the surface of the rotating base 11 is radially protruding and has an arc surface from back to front.

[0091] It can be understood that the axial direction is the axis direction of the fan assembly 10, and the fan assembly 10 axially supplies air from back to front, and this air supply direction is the wind flow direction f (as shown in f in Figure 1-2). A plurality of fan blades 12 can be provided, spaced apart and distributed on the surface of the rotating seat 11, whose radial radius gradually increases along the axial direction, and spirally extend from back to front, that is, spirally extend in the direction in which the radial radius of the rotating seat 11 gradually increases, thereby forming the fan assembly 10, which can simultaneously utilize the linear airflow of the axial flow and the pressure gain of the centrifugal flow, and has the advantages of both axial flow and centrifugal fans, thereby being able to generate a relatively large air volume in a smaller volume, so that the fan assembly 10 can provide stronger wind force and lower noise when in use. The surface of the rotating seat 11 is provided to protrude radially and to be an arc surface in the direction in which the radial radius of the rotating seat 11 gradually increases, so that the surface of the rotating seat 11 of the fan assembly 10, i.e., the wind guide surface, can present an arc-shaped transition, so that the wind guide surface can have a smooth transition, reduce the separation of the wind flow on the wind guide surface, avoid the wind flow from staying in depressions or corners, and avoid the depressions or corners from generating resistance to the wind flow, thereby achieving more effective guidance of the wind flow through a smoother arc shape, reducing the loss of the wind flow during transmission, and increasing the amount of air delivered.

[0092] Please refer to Figures 1-1 to 1-4. Furthermore, the rotating seat 11 includes a rear air guide portion 111, a blade connecting portion 112 and a front air guide portion 113 arranged in sequence along the axial direction from back to front. From the rear end of the rear air guide portion 111 to the front end of the blade connecting portion 112, the radial radius of the rotating seat 11 gradually increases, and the radial radius of the front air guide portion 112 remains unchanged from back to front; a plurality of blades 12 are distributed at intervals on the blade connecting portion 112, and extend spirally from back to front on the blade connecting portion 112.

[0093] Specifically, blades 12 on blade connection portion 112 are arranged in a spirally extending manner, thereby forming fan assembly 10 with integral rotating base 11. The rear air guide portion 111 allows airflow to be evenly directed along the surface of rear air guide portion 111 to blades 12 at blade connection portion 112. The front air guide portion 113 evenly distributes the portion of airflow accelerated by blades 12, reducing airflow loss caused by cross-section at the root of blade 12.

[0094] It should be noted that the rear air guide portion 111, the blade connection portion 112, the front air guide portion 113, and the blades on the blade connection portion 112 can be integrally formed, which can concentrate stress at the connection points of each component, making the overall structure more rigid and reducing the risk of vibration and deformation during operation of the fan assembly 10. In addition, the integral molding reduces gaps, which facilitates a seamless design, effectively reducing friction between the airflow and the various components, thereby reducing noise.

[0095] Please refer to Figures 1-4. It can be understood that the radial radius of the rotating seat 11 can be set to gradually increase from the rear air guide portion 111 and the fan blade connecting portion 112, so that the surface of the rotating seat 11 gradually rises along the wind direction f relative to the axis L of the rotating seat 11 (as shown in Figure 1-4 L), so as to achieve a seamless connection with an increasing radial radius between the rear air guide portion 111 and the fan blade 12, which is convenient for achieving a gradual increase in the pressure of the wind flow on the surface of the rotating seat 11 along the wind direction; and by arranging multiple fan blades 12 on the fan blade connecting portion 112, part of the wind flow entering the interior of the portable fan 3 is introduced into the static blade through the rear air guide portion 111, and part of the wind flow sent out by the fan blade 12 is sent out along the front air guide portion 113, thereby avoiding the loss of wind flow when entering the fan assembly 10 and the loss when sending out the fan assembly 10.

[0096] It can be understood that the radial radius of the front wind guide portion 113 remains constant and can be the same as the maximum radius range or maximum value of the fan blade connecting portion 112, so that the surface of the front wind guide portion 113 can be parallel to the axis L of the rotating seat 11, so that the wind passing through the surface of the front wind guide portion 113 can easily form a direct current wind parallel to the axis L of the rotating seat 11.

[0097] Please refer to Figures 1-1 to 1-4. The rotating seat 11 is in a semi-ellipsoidal shape.

[0098] It can be understood that the semi-ellipsoidal shape allows the radial radius of the rotating seat 11 to increase sequentially from the rear air guide portion 111 to the fan blade connection portion 112, and remain constant at the front air guide portion 113, making the surface transition of the rotating seat 11 more natural, thereby improving the lift efficiency of the fan blades 12, reducing resistance, and reducing the loss of air volume on the surface of the rotating seat 11, thereby achieving better operating performance of the fan assembly 10. In addition, the semi-ellipsoidal shape can effectively guide the airflow to reduce eddy currents and turbulence during mixed flow operation, thereby improving the smoothness and stability of the airflow, and helping to maximize the air volume and air pressure generated by the fan assembly 10.

[0099] Please refer to Figures 1-2 and 1-3. Further, the fan blade 12 includes a fan blade root end 122 connected to the fan blade connection portion 112 and a fan blade top end 121 away from the fan blade connection portion 112; the installation angle of the fan blade root end 122 of the fan blade 12 is 32-37°; the installation angle of the fan blade top end 121 of the fan blade 12 is 47-53°.

[0100] Specifically, the blade 12 includes a blade tip 121 and a blade root 122, a blade head 123 and a blade tail 124. The blade root 122 is the end of the blade connected to the surface of the rotating base 11, and the blade tip 121 is away from the blade root 122.

[0101] It can be understood that by setting the installation angle of the blade root end 122 of the fan blade 12 to 32-37° and the installation angle of the blade top end 121 of the fan blade 12 to 47-53°, the degree of bending of the fan blade 12 on the fan blade connection portion 112 can be ensured to achieve the maximum air supply volume and wind speed. And the range of the installation angles of the blade root end 122 and the blade top end 121 is set so that the degree of bending of the blade top end 121 on the fan blade 12 is greater than the degree of bending of the blade root end 122, thereby increasing the kinetic energy of the wind flow at the blade top end 121 to enhance the wind pressure output. In addition, by controlling the size of the installation angles of the blade root end 122 and the blade top end 121, the air supply range and noise level of the fan assembly 10 can be ensured, and the air volume and wind pressure delivered by the fan assembly 10 can be maximized within the range of the two.

[0102] Please refer to Figure 1-4. Furthermore, the fan blade 12 also includes a blade tail end 124 at the rear end and a blade head end 123 at the front end; the radial radius R1 of the rotating seat 11 at the corresponding position of the blade head end 123 of the fan blade 12 (as shown in Figure 1-4 R1) is 14.45-18.45mm, the radial radius R2 of the rotating seat 11 at the corresponding position of the blade tail end 124 of the fan blade 12 (as shown in Figure 1-4 R2) is 8-12mm, and the radial radius R3 of the rear end of the rear air guide portion 111 (as shown in Figure 1-4 R3) is 2.62-6.62mm.

[0103] It can be understood that the front and rear ends of the fan blade 12 are defined by the air supply direction of the fan assembly 10, that is, the wind flow passes through the rear end and the front end in sequence, and the front end 123 of the fan blade is the end close to the front air guide portion 113; the rear end 124 of the fan blade is close to the end of the rear air guide portion 111, and the corresponding wind flow passes through the rear end 124 and the front end 123 of the fan blade in sequence. The radial radius R1 of the rotating seat 11 at the position corresponding to the blade head end 123 of the fan blade 12 is 14.45-18.45mm, the radial radius R2 of the rotating seat 11 at the position corresponding to the blade tail end 124 of the fan blade 12 is 8-12mm, and the radial radius R3 of the rear end of the rear air guide portion 111, that is, the boundary part of the rear air guide portion 111 away from the blade connection end is 2.62-6.62mm, so that the increase in the radial radius on the fan blade connection portion 112 is smaller than the increase in the rear air guide portion 111, and the slope from the fan blade connection portion 112 to the front air guide portion 113 is flatter, which is conducive to the rapid generation and rapid pressurization of airflow on the fan blade connection portion 112, and when the fan blade 12 derives the airflow, part of the airflow derived along the surface of the fan blade connection portion 112 can be smoothly derived along the front air guide portion 113, which is conducive to achieving more stable pressurization and acceleration of the airflow, and further reducing noise.

[0104] Please refer to Figure 1-5. Furthermore, the axial length P2 of the fan blade connecting portion 112 (as shown in Figure 1-5, P2) is greater than the axial length P3 of the front air guide portion 113 (as shown in Figure 1-5, P3), and the axial length P3 of the front air guide portion 113 is greater than the axial length P1 of the rear air guide portion 111 (as shown in Figure 1-5, P1).

[0105] It is understandable that the axial length of the fan blade connecting portion 112 can be greater than the axial length of the front air guide portion 113 and the axial length of the rear air guide portion 111, so as to more effectively promote air flow, reduce airflow separation, and thus improve the overall airflow efficiency and wind pressure of the fan assembly 10. The axial length of the front air guide portion 113 is greater than the axial length of the rear air guide portion 111, thereby ensuring the air guide length of the front air guide portion 113, facilitating the airflow sent through the fan blades 12 to be sent along the front air guide portion 113, thereby improving the stability of the wind speed and air volume of the airflow sent through the fan blades 12, avoiding the influence of the wind speed and air volume of the airflow sent through the fan blades 12 due to the length of the front air guide portion 113 being too short, and further reducing the air volume loss caused by the cross section of the airflow sent through the root position of the fan blades 12.

[0106] Please refer to Figure 1-5. Furthermore, the axial length of the fan blade 12 is the axial length P2 of the fan blade connection portion, and the axial length P2 of the fan blade connection portion 112 is 1 / 2 to 3 / 4 of the axial length P0 of the rotating seat 11 (P0 as shown in Figure 1-5), so that the fan blade connection portion 112 occupies at least half of the surface of the rotating seat 11, thereby ensuring the overall spiral extension length of the fan blade 12 on the rotating seat 11, thereby ensuring that the fan blade 12 can provide stronger airflow, deliver a larger air volume and increase the airflow boosting effect.

[0107] Please refer to Figures 1-5. Furthermore, the axial length P0 of the rotating seat 11 is 21-25 mm; the axial length P1 of the fan blade 12 is 12-16 mm. The control of this range satisfies that the axial length of the fan blade 12 is within the range of 1 / 2 to 3 / 4 of the axial length of the rotating seat 11, and further refines the axial length P2 of the fan blade connection portion 112 and the axial length P0 of the rotating seat 11, thereby ensuring the overall quality of the final fan assembly 10, so as to ensure the air supply performance and reliability of the fan assembly 10.

[0108] Please refer to Figures 1-1 and 1-4. Furthermore, a mounting groove 114 is provided on the inner side of the rotating base 11. The groove wall of the mounting groove 114 and the rotating base 11 form a double-layer structure. The mounting groove 114 is used to install the motor 30.

[0109] Specifically, the double-layer structure includes the outer wall of the fan blade 12 and the groove wall of the mounting groove 114. The radial radius of the ring formed by the rotating seat 11 is larger than the radial radius of the ring formed by the groove wall of the mounting groove 114, and the rotating seat 11 and the groove wall of the mounting groove 114 are connected by multiple connecting structures arranged at intervals, thereby improving the stability between the two-layer structure. Other components of the portable fan 3, such as the motor 30, can be installed in the mounting groove 114 to achieve the connection between the fan assembly 10 and other components without affecting the rotation of the fan assembly 10. By setting the ring side of the rotating seat 11 corresponding to the mounting groove 114 to be a double-layer structure, the protection effect of the components in the mounting groove 114 is improved. At the same time, the double-layer structure is also used to reduce the noise in the wind flow.

[0110] Please refer to Figures 1-5 and 1-6. Furthermore, among any two adjacent fan blades 12, the blade head end 123 of one fan blade 12 is mapped correspondingly between the blade tail end 124 and the blade head end 123 of the other fan blade 12 along the axial direction of the rotating seat 11, so that the air guide channels between any two adjacent fan blades 12 cannot form an air guide route parallel to the axis L of the rotating seat 11, thereby avoiding the wind flow passing straight through between the two adjacent fan blades 12, so as to increase the wind guide length and the curvature of the wind guide route between the two adjacent fan blades 12, which is conducive to delivering a larger air volume, faster speed and stronger air flow.

[0111] It should be noted that the number of blades 12 on the fan assembly 10 is an odd number, for example, 7, 9, 11, etc., which can be set according to actual circumstances and is not limited in this embodiment. Setting the number of blades 12 to an odd number can reduce resonance and enhance stability, avoiding the problem that an even number of blades will resonate when rotating at high speeds, causing blade fatigue or even breakage. Setting the number of blades 12 to an odd number can form a more complex and effective airflow pattern during rotation, thereby enhancing the air supply effect of the fan assembly 10.

[0112] Please refer to Figures 1-7 and 1-8. The second embodiment of this scheme also provides a portable fan 3, including a pressure member 20 and a fan assembly 10 described in any one of the first embodiments. The fan assembly 10 and the pressure member 20 are arranged in sequence along the axial direction. The pressure member 20 includes a pressure seat 21 and a plurality of static blades 22. The plurality of static blades 22 are arranged at intervals on the pressure seat 21.

[0113] It is understood that the fan assembly 10 of the first embodiment can be used inside the portable fan 3 and arranged axially in sequence with the pressure member 20 inside the portable fan 3, so that the airflow entering the portable fan 3 passes through the fan assembly 10 and the pressure member 20 in sequence. The airflow entering the portable fan first passes through the rotation of the fan assembly 10 to output a strong airflow to the pressure member 20, and the pressure member 20 guides the airflow to the pressure member 20 through the extension of the static blades 22. The pressure member 20 then continues to pressurize and speed the airflow before it is sent out of the portable fan 3. The portable fan 3 includes any fan assembly 10 described in the first embodiment and has the same technical effects as the fan assembly 10 in the first embodiment, and this embodiment does not limit this.

[0114] It should be noted that, in this embodiment, the portable fan 3 can be a handheld portable fan, or a small fan having only the above-mentioned fan assembly 10, or a desktop fan, a clip fan, a versatile fan, etc., and this embodiment does not impose any restrictions on this.

[0115] Optionally, the portable fan 3 may include a fan assembly 1 and a power supply 2 connected to the fan assembly 1. A pressure member 20 and the fan assembly 10 are both disposed within the fan assembly 1. The power supply 2 is disposed outside the fan assembly 1 and electrically connected to a motor 30, providing power to the motor 30 and driving the fan assembly 10 to rotate and produce airflow. The power supply 2 may be a handheld assembly for use by a user or for use standing on a flat surface, while the fan assembly 1 is used to blow air toward the user.

[0116] Specifically, a mounting cavity 211 is provided on one side of the pressure member 20 near the rotating base 11. The mounting groove 114 and the mounting cavity 211 face each other and form a mounting space, in which the motor 30 is housed. Specifically, the power supply unit 2 supplies power to the motor 30, which drives the fan assembly 10 as a whole to rotate, thereby driving the fan blades 12 to rotate.

[0117] Optionally, the fan assembly 1 further includes a display assembly 40, which is disposed on a side of the pressurizing seat 21 facing away from the fan assembly 10. The display assembly 40 can be used to display at least one of the power level, the current gear position, and the charging status.

[0118] Option 2

[0119] Please refer to Figures 2-1 to 2-3. The first embodiment of the present scheme provides a motor 1. The motor 1 includes a stator assembly 20 and a rotor assembly 30 arranged coaxially. The rotor assembly 30 can rotate relative to the stator assembly 20. The stator assembly 20 includes a stator core 21 and a winding 22. The stator core 21 is surrounded by a plurality of winding portions 23. The winding 22 is wound on the winding portions 23. The winding portions 23 include a plurality of stacked magnetic conductive parts 230. The rotor assembly 30 includes a magnet 31 arranged outside the stator assembly 20. The axial length of the magnet 31 is greater than the total thickness of the plurality of stacked magnetic conductive parts 230.

[0120] It can be understood that if the axial length of the magnet 31 is defined as D and the total thickness of the multiple stacked magnetic conductive parts 230 is defined as d, then D>d. Since the axial length of the magnet 31 is greater than the total thickness of the multiple stacked magnetic conductive parts 230, the leakage magnetic flux at the end of the magnet 31 will be reduced, and the magnetic circuit can be better closed, thereby increasing the effective utilization ratio of the magnetic flux. At the same time, the axial length of the magnet 31 is greater than the total thickness of the multiple stacked magnetic conductive parts 230, which ensures a more complete magnetic circuit and effective conduction of the magnetic flux, making the magnetic flux density distribution more uniform, thereby improving the magnetic flux utilization rate. The improvement in the magnetic flux utilization rate allows the magnetic flux to be fully utilized to generate the torque of the motor 1. The motor 1 can generate greater output power with lower energy consumption, thereby improving the performance of the motor 1.

[0121] It should be noted that the magnetic conductive member 230 may be made of silicon steel sheet 231 , or may be made of iron-nickel alloy, amorphous alloy, etc., which is not limited here.

[0122] 2-3 , further, the magnetic conductive member 230 is a silicon steel sheet 231 , and the axial length of the magnet 31 is between 11 mm and 13 mm; the total thickness of the multiple stacked silicon steel sheets 231 is between 7.5 mm and 9.5 mm.

[0123] It can be understood that 11mm≤D≤13mm, 7.5mm≤d≤9.5mm. The total thickness of the silicon steel sheet 231 is an important technical parameter. If the total thickness of the silicon steel sheet 231 is too thick, the eddy current loss will increase, resulting in an increase in the iron loss of the motor 1 and a decrease in efficiency. At the same time, the heat generation of the motor 1 will also increase. If the total thickness of the silicon steel sheet 231 is too thick, the volume will increase and structural redundancy will result. However, when the total thickness of the silicon steel sheet 231 is insufficient, resulting in the magnetic flux density reaching the saturation magnetic flux density of the silicon steel sheet 231, the excess magnetic force cannot be effectively conducted through the silicon steel sheet 231, forming leakage magnetic flux, which will also cause the efficiency of the motor 1 to decrease. The total thickness of the silicon steel sheet 231 between 7.5mm and 9.5mm can not only reduce eddy current loss and improve the efficiency of the motor 1, but also ensure that sufficient magnetic flux density can be accommodated in a smaller volume. The axial length of magnet 31 is between 11mm and 13mm, slightly larger than the corresponding total thickness of silicon steel sheet 231. This effectively closes the magnetic circuit and reduces magnetic flux leakage, thereby improving the magnetic efficiency of motor 1. This arrangement ensures that the total thickness of silicon steel sheet 231 matches the axial length of magnet 31, meeting the size and performance requirements of motor 1 with a more compact structure. This also reduces eddy current losses, ensures sufficient magnetic flux density, and achieves better performance for motor 1. Furthermore, the aforementioned dimensions of silicon steel sheet 231 and magnet 31 are more suitable for installation in portable fan 100.

[0124] Optionally, as a specific implementation, the axial length D of the magnet 31 is 12 mm; the total thickness d of the multiple stacked silicon steel sheets 231 is 8.5 mm.

[0125] 2-2 and 2-3 , further, the magnetization amount of the magnet 31 is between 1100 Gauss and 1300 Gauss; the outer diameter of the magnet 31 is between 25.2 mm and 27.2 mm; and the inner diameter of the magnet 31 is between 21.8 mm and 23.8 mm.

[0126] It can be understood that by setting the magnetization of magnet 31 between 1100 and 1300 gauss, eddy current losses in motor 1 can be reduced, improving the overall operating efficiency and performance of motor 1. The outer diameter of magnet 31 is defined as R, and the inner diameter of magnet 31 is defined as r; 25.2mm≤R≤27.2mm, 21.8mm≤r≤23.8mm. By setting the outer and inner diameters of magnet 31 as described above, it is possible to match the axial length of magnet 31, providing the required geometric dimensions and magnetic field strength.

[0127] Optionally, as a specific implementation, the magnetization of the magnet 31 is 1200 Gauss.

[0128] Optionally, as a specific implementation, the outer diameter R of the magnet 31 is 26.2 mm; the inner diameter r of the magnet 31 is 22.8 mm.

[0129] Please refer to Figure 2-2 and Figure 2-4. Further, the diameter of the stator assembly 20 is between 21mm and 23mm, the spacing between the two opposite winding parts 23 is between 12mm and 14mm; the wire diameter of the winding 22 is between 0.45mm and 0.47mm; the number of the winding parts 23 is 6, 8 or 9.

[0130] It can be understood that the diameter of the stator assembly 20 is defined as H, and the spacing between the two opposing winding sections 23 is defined as h; 21mm≤H≤23mm, and 12mm≤h≤14mm. A stator assembly 20 diameter between 21mm and 23mm helps concentrate magnetic flux and improve the magnetic efficiency of the motor 1. A spacing between the two opposing winding sections 23 between 12mm and 14mm helps reduce electromagnetic interference between the windings, thereby reducing copper losses. The wire diameter of the winding 22 is set between 0.45mm and 0.47mm to adapt to the power supply requirements of the motor 1. The greater the number of winding sections 23, the greater the output power, but this is also accompanied by increased heat loss. Depending on different power requirements, a different number of winding sections 23 can be selected, such as 6, 8, or 9 winding sections 23. When balancing the performance and efficiency of the motor 1, an appropriate number of winding sections 23 can further improve the performance of the motor 1.

[0131] Optionally, as a specific embodiment, the diameter H of the stator assembly 20 is 22 mm; and the distance h between the two opposite winding parts 23 is 13 mm.

[0132] Optionally, as a specific implementation, the wire diameter of the winding wire 22 is 0.45 mm or 0.47 mm.

[0133] Referring to Figures 2-2, 2-4, and 2-5, the motor 1 of this embodiment is applied to a portable fan 100, which includes a rotating seat 33. Furthermore, the motor 1 includes a boss 40. A first through-hole 211 is defined in the center of the stator core 21. The boss 40 passes through the first through-hole 211 and is fixedly connected to the stator core 21. The boss 40 also includes a second through-hole 41. The rotor assembly 30 also includes a rotating shaft 32 and two bearings 34. The two bearings 34 are respectively disposed at both ends of the second through-hole 41. The rotating shaft 32 passes through the two bearings 34 and one end extends out of the boss 40. The rotating seat 33 is fixedly connected to the end of the rotating shaft 32 extending out of the boss 40. The rotating seat 33 is also fixedly connected to the magnet 31.

[0134] It can be understood that by providing the first through hole 211, the boss 40 and the stator core 21 can be assembled, thereby improving the stability of the fixed connection between the motor 1 and the boss 40. The bearing 34 is disposed in the second through hole 41 to reduce the friction during the rotation of the shaft 32, thereby reducing energy consumption and improving the efficiency of the motor 1. The bearing 34 can also maintain the stable rotation of the shaft 32, reducing vibration and noise. Since the rotating seat 33 is fixedly connected to the magnet 31, one end of the rotating shaft 32 is connected to the rotating seat 33. When the magnet 31 rotates, it can drive the rotating seat 33 to rotate, thereby realizing a blowing function that accelerates air flow.

[0135] 2-2 and 2-4 , further, the diameter of the first through hole 211 is between 10 mm and 12 mm; the diameter of the second through hole 41 is between 8.6 mm and 10.6 mm.

[0136] It can be understood that the diameter of the first through-hole 211 is defined as L1, and the diameter of the second through-hole 41 is defined as L2; ​​10mm≤L1≤12mm, and 8.6mm≤L2≤10.6mm. The diameter of the first through-hole 211 is between 10mm and 12mm; the diameter of the second through-hole 41 is between 8.6mm and 10.6mm. This dimensional design ensures that the boss 40 is securely connected to the motor 1 while accommodating the normal rotation of the shaft 32 and bearing 34, while maintaining sufficient mechanical strength.

[0137] Optionally, as a specific implementation, the diameter L1 of the first through hole 211 is 11 mm; the diameter L2 of the second through hole 41 is 9.6 mm.

[0138] Please refer to Figure 2-2 and Figure 2-5. Further, a mounting groove 331 is opened on the side of the rotating seat 33 close to the boss 40, the boss 40 extends into the mounting groove 331, the stator assembly 20 and the magnet 31 are located in the mounting groove 331, the magnet 31 is fixedly connected to the inner side wall of the mounting groove 331, and one end of the rotating shaft 32 extending out of the boss 40 is fixedly connected to the inner bottom wall of the mounting groove 331.

[0139] It can be understood that by providing the mounting groove 331, the mounting groove 331 plays a role in protecting, accommodating and reducing noise for the stator assembly 20 and the magnet 31. The magnet 31 is fixedly connected to the inner wall of the mounting groove 331, and one end of the rotating shaft 32 extending out of the boss 40 is fixedly connected to the inner bottom wall of the mounting groove 331, so that the rotating seat 33 and the magnet 31 and the rotating shaft 32 can achieve the same direction rotation with a higher connection strength.

[0140] Please continue to refer to Figures 2-2 and 2-5. Further, the groove depth of the mounting groove 331 is greater than or equal to the axial length of the magnet 31, and a gap 332 is left between the magnetic conductive part 230 and the groove and inner bottom wall of the mounting groove 331; the mounting groove 331 also includes a connecting portion 3311, the connecting portion 3311 bulges toward the boss 40, and the connecting portion 3311 is provided with a connecting cavity 3312 corresponding to the rotating shaft 32, and one end of the rotating shaft 32 extends out of the boss 40 and is plugged into the connecting cavity 3312.

[0141] It can be understood that because the depth of the mounting groove 331 is greater than or equal to the axial length of the magnet 31, and the axial length of the magnet 31 is greater than the total thickness of the multiple stacked magnetic conductive members 230, the mounting groove 331 is deep enough to accommodate the magnet 31 and the magnetic conductive member 230. A gap 332 is left between the magnetic conductive member 230 and the notch and inner bottom wall of the mounting groove 331. The gap 332 further limits the total thickness of the magnetic conductive member 230, thereby reducing eddy current loss and improving magnetic flux utilization. The gap 332 also ensures a safe distance between the stator assembly 20 and the rotating seat 33, improving safety during rotation. Because the connecting portion 3311 is raised toward the boss 40, the connecting portion 3311 defines a connecting cavity 3312 corresponding to the rotating shaft 32. The raised shape of the connecting portion 3311 can make the connecting cavity 3312 have a deeper cavity depth, thereby improving the connection strength of the rotating shaft 32 when inserted into the connecting cavity 3312, and achieving a tight connection between the rotating seat 33 and the rotating shaft 32.

[0142] 2-2 and 2-5 , further, an elastic member 35 is sleeved on the rotating shaft 32 , one end of the elastic member 35 abuts against the mounting groove 331 , and the other end abuts against the bearing 34 facing the mounting groove 331 .

[0143] It can be understood that the two ends of the elastic member 35 abut the rotating seat 33 and the bearing 34 respectively, and can rotate with the rotating seat 33 and the bearing 34. The elastic member 35 can use elastic force to prevent the rotating seat 33 from vibrating in the axial direction, which helps to reduce working noise and improve user experience.

[0144] Optionally, the elastic member 35 is a spring.

[0145] Referring to Figures 2-6 and 2-7 , a second embodiment of the present invention provides a portable fan 100. The portable fan 100 includes a main body 110 and the motor 1 of the first embodiment of the present invention. The main body 110 defines a chamber 111, and the motor 1 is disposed within the chamber 111. The portable fan 100 includes a rotating base 33, which is a diagonal flow fan, an axial flow fan, or a centrifugal fan.

[0146] As can be understood, chamber 111 provides a space for accommodating motor 1. Portable fan 100 includes rotating base 33. Rotating base 33, when a diagonal flow fan, axial flow fan, or centrifugal fan, can accelerate airflow in the axial and / or radial directions. The portable fan 100 using the above-described motor 1 has the advantages of powerful performance and quiet operation.

[0147] Option 3

[0148] Please refer to Figures 3-1 to 3-3. The first embodiment of the present scheme provides a fan blade assembly 1, including: a shell 15, which is internally connected and includes an air inlet end 151 and an air outlet end 152; a fan assembly 11, including a rotating seat 111 and a plurality of fan blades 112; a pressure piece 13, and the fan assembly 11 are arranged in sequence along the axial direction and respectively correspond to the air outlet end 152 and the air inlet end 151, the pressure piece 13 includes a pressure seat 131 and a plurality of static blades 132; a supercharger 12, which is arranged inside the shell 15, and is internally connected and surrounds the radial periphery of the fan assembly 11 and the pressure piece 13; wherein the static blades 132 extend radially to connect the pressure seat 131 and the supercharger 12, and the static blades 132 extend axially beyond the pressure seat 131.

[0149] Specifically, the shell 15 is a hollow through-structure, including an air inlet end 151 and an air outlet end 152. The air inlet end is a port for the external airflow to enter the interior of the shell, and the air outlet end is a port for the airflow entering the interior of the shell to be discharged to the outside. The outer surface of the supercharger 12 is connected to the inner surface of the shell 15. That is, the supercharger 12 is a structure that is independent of the shell 15 and is used to pressurize the airflow, so that in this embodiment, the supercharger 12 is used to cooperate with the pressurizing seat 131 and the rotating seat 111 in sequence to achieve gradual pressurization and acceleration of the airflow, thereby increasing the wind pressure and wind speed of the airflow finally sent out. Instead of the shell 15 and the pressurizing seat 131 and the rotating seat 111 in sequence to achieve gradual pressurization of the airflow. In addition, the setting of the supercharger 12 enables the fan blade assembly 1 to form a double-layer structure, which is more conducive to reducing noise and facilitates obtaining a high-pressure, low-noise portable fan 3.

[0150] More specifically, the fan assembly 11 can accelerate the airflow entering the supercharger 12 from the air inlet end 151 by rotating and then send it out. The fan assembly 11 can be an axial flow fan or a diagonal flow fan, and this embodiment does not limit this. The airflow direction f (as shown in FIG3-2 f) can be defined as the direction of the airflow in the fan assembly 11 in the axial direction of the fan assembly 11, that is, the direction of the airflow along the axial direction of the fan assembly 11 flowing into the fan assembly 11 to flowing out of the fan assembly 11. That is, the pressure member 13 and the fan assembly 11 can be arranged in sequence along the opposite direction of the airflow direction f, that is, the fan assembly 11 and the pressure member 13 are arranged in sequence along the airflow direction f, so that the fan assembly 11 and the pressure member 13 correspond to the air inlet end 151 and the air outlet end 152 of the housing 15 respectively, that is, the fan assembly 11 is arranged close to the air inlet end 151 relative to the pressure member 13, and the pressure member 13 is arranged close to the air outlet end 152 relative to the fan assembly 11. The pressurizing seat 131 and the stationary blades 132 of the pressurizing member 13 correspond to the rotating seat 111 and the blades 112 of the fan assembly 11, respectively, so that the airflow sent by the blades 112 of the fan assembly 11 is sent out through the stationary blades 132 and the rotating seat 111. The supercharger 12 can have a hollow annular structure, so that it can surround the radial periphery of the fan assembly 11, thereby enclosing the entire fan assembly 11 and the pressurizing member 13.

[0151] It can be understood that the static blades 132 of the pressure seat 131 can be radially extended to connect the pressure seat 131 and the supercharger 12, and the static blades 132 can be axially extended beyond the pressure seat 131. The static blades 132 extend axially to extend closer to the fan assembly 11 to the outside of the pressure seat 131, which can reduce the distance between the static blades 132 on the fan assembly 11 and the blades 112 on the pressure seat 131, so as to better and efficiently transfer the wind flow sent by the blades 112 to the pressure member 13, reduce the loss of the air volume sent by the fan assembly 11 inside the housing 15, and thus increase the air volume. In addition, the static blades 132 extend axially away from the fan assembly 11 to the outside of the pressure seat 131, which can increase the wind guide distance of the corresponding area of ​​the air outlet end 152, which is more conducive to wind guidance.

[0152] Please refer to Figures 3-3 and 3-4. Further, the rotating seat 111 includes a rear air guide portion 1111, a blade connection portion 1112, and a front air guide portion 1113 arranged in sequence along the axial direction; the radial radius of the rotating seat 111 gradually increases from the rear air guide portion 1111 to the blade connection portion 1112; the static blade 132 extends axially to between the front air guide portion 1113 and the inner surface of the supercharger 12.

[0153] Specifically, the rear air guide portion 1111, the fan blade connection portion 1112 and the front air guide portion 1113 are arranged in sequence along the axial direction, that is, in sequence along the wind direction f. The fan blades 112 are arranged in a spiral extension manner and extend from the fan blade connection portion 1112, thereby forming a fan assembly 11 with the overall rotating seat 111. The setting of the front air guide portion 1113 can more evenly guide part of the airflow entering the supercharger 12 from the outside to the fan blades 112. The setting of the rear air guide portion 1111 can guide part of the airflow accelerated by the fan blades 112 to the relative rotating seat 111, reducing the loss of air volume caused by the cross-section of the airflow sent out by the root of the fan blades 112. The axial length of the fan blade connection portion 1112 can be greater than the axial length of the front air guide portion 1113 and the axial length of the rear air guide portion 1111, so as to more effectively promote air flow, reduce the airflow separation phenomenon, and thus improve the overall airflow efficiency and wind pressure of the fan assembly 11. Optionally, the axial length of the fan blade connecting portion 1112 is between 1 / 2 and 3 / 4 of the overall length of the rotating seat 111, so as to minimize the wind guiding distance between the fan blade 112 and the stationary blade 132 while ensuring the visual wind guiding function of the front wind guide portion 1113 and the rear wind guide portion 1111.

[0154] It is understandable that the stationary blades 132 can be set to extend axially so as to extend from the pressure seat 131 to the inside of the supercharger 12, and extend to between the front air guide portion 1113 and the inner surface of the supercharger 12, so as to further reduce the distance between the stationary blades 132 on the fan assembly 11 and the blades 112 on the pressure seat 131, thereby enabling the wind flow sent by the blades 112 to be more efficiently transferred to the pressure member 13. Moreover, the stationary blades 132 extend through the gap C between the pressure seat 131 and the rotating seat 111 (as shown in C in Figure 3-2), so the blades 112 will directly transfer the wind flow to the stationary blades 132 on the rotating seat 111, thereby reducing the loss of the wind flow sent by the blades 112 at the gap C between the pressure seat 131 and the rotating seat 111, thereby increasing the amount of air sent.

[0155] As an optional embodiment, the radial radius of the rotating seat 111 gradually increases from the rear air guide portion 1111, the fan blade connection portion 1112 and the front air guide portion 1113, and the increase in the radial radius of the front air guide portion 1113 is smaller than the increase in the radial radius of the rear air guide portion 1111 and the fan blade connection portion 1112, so that the slope of the front air guide portion 1113 is smoother, which is conducive to maintaining the wind speed of the airflow discharged through the surface of the fan blade connection portion 1112.

[0156] As another optional embodiment, the increase in the radial radius of the front air guide portion 1113 can be ignored compared to the increase in the radial radius of the rear air guide portion 1111 and the fan blade connecting portion 1112. That is, even if the radial radius of the front air guide portion 1113 remains constant, it can be the same as the maximum radius range or maximum value of the fan blade connecting portion 1112, and the surface of the front air guide portion 1113 can be parallel to the axis of the rotating seat 111, so that the wind passing through the surface of the front air guide portion 1113 can easily form a direct current wind parallel to the axis of the rotating seat 111.

[0157] Please refer to Figures 3-2 and 3-5. Furthermore, the supercharger 12 includes a first cover 121, a second cover 122 and a third cover 123 that are axially connected in sequence. The first cover 121 surrounds the outside of the pressurizing seat 131, and a plurality of stationary blades 132 are arranged at intervals outside the pressurizing seat 131 and connected to the first cover 121.

[0158] It can be understood that the fan blade assembly 1 includes a rear cover 17, which is connected to the shell 15 and the second cover 122 through the third cover 123. The first cover 121, the second cover 122 and the third cover 123 are all hollow structures, so the supercharger 12 formed by the connection of the three can surround the radial periphery of the pressurizing seat 131 and the fan assembly 11. The first cover 121 corresponds to the air outlet end 152 connected to the shell 15, and the third cover 123 corresponds to the air inlet end 151 connected to the shell 15. The two ends of the second cover 122 are respectively connected to the first cover 121 and the third cover 123, and the outer surface of the second cover 122 abuts the inner surface of the shell 15. After the multiple static blades 132 are spaced apart outside the pressurizing seat 131 and connected to the first cover 121, multiple air outlets are formed between any two adjacent static blades 132 and the first cover 121 and the pressurizing seat 131, for the airflow after being pressurized and accelerated by the supercharger 12 and the pressurizing member 13 to enter the outside world. First cover 121 is connected to the air outlet end 152 of housing 15. It connects not only to housing 15 but also to pressure member 13, facilitating smoother airflow into the environment. This ensures that first cover 121 connects to other components of portable fan 3 while also securing stationary blades 132 on pressure base 131, preventing them from shaking. This strengthens the overall structural strength of pressure member 13, reduces vibration, and ensures smoother and more stable operation of the entire fan assembly 1.

[0159] Optionally, the connection between the first cover 121 , the second cover 122 and the third cover 123 may be a fixed connection or a detachable connection, and this embodiment does not impose any limitation thereto, as long as the three are connected to form the supercharger 12 .

[0160] Optionally, when the first cover 121, the second cover 122, and the third cover 123 are detachably connected, the rear cover 17 is fixedly connected to the third cover 123, and the pressure member 13 is fixedly connected to the first cover 121. The two ends of the second cover 122 are detachably connected to the first cover 121 and the third cover 123, respectively, thereby facilitating the assembly and disassembly of the fan blade assembly 1.

[0161] Please refer to Figures 3-3 and 3-5. Further, the stationary blade 132 includes a connecting portion 1321 and an extending portion 1322. The connecting portion 1321 is located between the pressurizing seat 131 and the first cover 121, and connects the pressurizing seat 131 and the first cover 121 respectively; the extending portion 1322 includes a portion located between the pressurizing seat 131 and the second cover 122, and a portion located between the front air guide portion 1113 and the second cover 122. The extending portion 1322 extends axially from the connecting portion 1321 toward the fan blade 112, and extends axially to between the front air guide portion 1113 and the inner surface of the supercharger 12.

[0162] As will be understood, the stationary blade 132 includes a connecting portion 1321 connecting the pressure seat 131 and the first cover 121 at both ends, and an extension portion 1322 connected to the pressure seat 131 and the connecting portion 1321, respectively. The extension portion 1322 extends axially beyond the pressure seat 131 at one end, distal from the connecting portion 1321. The extension portion 1322 not only protrudes relative to the first cover 121 and the pressure seat 131, but also extends into the space between the front air guide 1113 and the inner surface of the supercharger 12, thereby crossing the gap C between the pressure seat 131 and the front air guide 1113 to complete airflow transmission with the fan blade 112 and avoid the influence of the first cover 121 on airflow transmission. Furthermore, the connecting portion 1321 and the extension portion 1322 of the stationary blade 132 are integrally structured, and the entire pressure member 13 can be integrally formed, thereby improving the overall strength of the pressure member 13. The connecting portion 1321 and the extending portion 1322 of the stationary blade 132 with an integrated structure can respectively realize the connecting function and the wind guiding function, and the integrated structure formed by the connecting portion 1321 and the extending portion 1322 is more conducive to the natural transition of the extended introduced wind flow to the connecting portion 1321, thereby entering the outside world, further reducing noise.

[0163] Please refer to FIG. 3-3 . Furthermore, the inner surfaces of the first cover 121 , the second cover 122 and the third cover 123 smoothly transition to form a first airflow channel surface 16 , and the extension portion 1322 extends between the front air guide portion 1113 and the first airflow channel surface 16 .

[0164] It can be understood that the inner surfaces of the connection between the first cover 121 and the third cover 123 and the second cover 122 can be kept flush, so that the inner surface of the part of the first cover 121 extending into the interior of the supercharger 12 can smoothly transition with the inner surface of the supercharger 12 to form a first airflow channel surface 16, so that the airflow can pass through the first airflow channel surface 16 more smoothly, avoiding the airflow sent out by the fan blades 112 from being damaged at the connection position between the first cover 121 and the supercharger 12.

[0165] Please refer to Figures 3-2 and 3-6. Furthermore, the first airflow channel surface 16 protrudes radially to form an arc surface. The supercharger 12 includes an air inlet 1231 and an air outlet 1211. The radial diameter of the supercharger 12 gradually increases from the air inlet 1231 to the air outlet 1211; the radial diameter D1 of the air inlet 1231 of the supercharger 12 (as shown in D1 in Figure 3-6) is 44.9-48.9 mm, and the radial diameter D2 of the air outlet 1211 of the supercharger (as shown in D2 in Figure 3-6) is 53.4-57.4 mm.

[0166] It can be understood that the first airflow channel surface 16 protrudes radially to form an arc surface. The setting of the arc surface is conducive to guiding the airflow, and at the same time it can facilitate the airflow to flow more smoothly when passing through the arc surface, thereby making the airflow delivered by the fan blades 112 stronger and more stable; in addition, it can also reduce noise.

[0167] It should be noted that the protruding position of the arc surface corresponds to the gap between the fan blade 112 and the stator blade 132, thereby slightly increasing the volume there, so that the wind flow sent out by the fan blade 112 can be briefly buffered there, and after buffering, enter the space between the supercharger 12 and the pressure member 13 along the arc surface for continued pressurization before being sent out, thereby effectively guiding the wind flow, reducing the formation of vortexes, improving the stability of the wind flow flowing into the inner surface between the pressure member 13 and the supercharger 12, and further reducing the loss of wind flow in the gap between the fan blade 112 and the stator blade 132.

[0168] It can be understood that the air inlet 1231 and the air outlet 1211 of the supercharger 12 are arranged corresponding to the air inlet end and the air outlet end 152 of the shell 15. The radial diameter of the supercharger 12 gradually increases from the air inlet 1231 to the air outlet 1211, so that the arc surface transition of the first airflow channel surface 16 is more natural and smooth, and the airflow sent out by the fan blades 112 is gradually pressurized, making the process of pressurizing the airflow more stable, ensuring the stability of the airflow during the pressurization process, thereby reducing the fluctuation and vortex phenomenon of the airflow and improving the overall stability of the airflow; and by setting the radial diameter D1 of the air inlet 1231 of the supercharger 12 to 44.9-48.9mm and the radial diameter D2 of the air outlet 1211 to 53.4-57.4mm, the radial diameter range of the supercharger 12 is limited, thereby limiting the upper and lower limits of the supercharger 12, avoiding the supercharge range being too large or too small to affect the stability of the airflow and generate greater noise.

[0169] Please refer to Figures 3-3 and 3-7. Furthermore, the gap width L1 between the top end 1323 of the static blade of the extension portion 1322 and the inner surface of the supercharger 12 (as shown in L1 in Figure 3-7) is smaller than the gap width L2 between the top end 1121 of the fan blade 112 and the inner surface of the supercharger 12 (as shown in L2 in Figure 3-7).

[0170] Specifically, the stator blade 132 includes a stator blade tip 1323, a stator blade root end 1324, a stator blade head end 1325, and a stator blade tail end 1326. The stator blade root end 1324 is the end connected to the pressurizing seat 131; the stator blade tip 1323 is the end away from the stator blade root end 1324, that is, the end close to the inner surface of the supercharger 12; the stator blade head end 1325 is the end away from the fan assembly 11 and corresponds to the air outlet end 152 of the housing 15; and the stator blade tail end 1326 is the end close to the fan assembly 11. The fan blade 112 includes a blade tip 1121, a blade root end 1122, a blade head end 1123, and a blade tail end 1124. The blade root end 1122 is the end connected to the rotating seat 111; the blade tip 1121 is the end away from the blade root end 1122, that is, the end close to the inner surface of the supercharger 12; the blade head end 1123 is the end close to the pressure member 13; the blade tail end 1124 is the end away from the pressure member 13, and the end corresponding to the air outlet end 152 of the housing 15 and the air inlet 1231 of the supercharger 12. The width L1 of the gap between the top 1323 of the static blade of the extension 1322 and the inner surface of the supercharger 12 is smaller than the width L2 of the gap between the top 1121 of the blade 112 and the inner surface of the supercharger 12, which can reduce the wind flow transmitted by the blade 112 from passing through the gap between the blade 112 and the supercharger 12 and reduce the wind speed, thereby ensuring that most of the wind flow transmitted by the blade 112 can be transmitted at a high wind speed through the static blade 132.

[0171] Furthermore, from one end of the extension portion 1322 close to the fan blade 112 to the other end of the extension portion 1322 away from the fan blade 112, the gap width between the top end 1323 of the stationary blade of the extension portion 1322 and the inner surface of the supercharger 12 is the same; the gap width between the top end 1323 of the stationary blade of the extension portion 1322 and the inner surface of the supercharger 12 is 0.

[0172] It can be understood that the gap width L1 at each position between the stator blade tip 1323 of the extension portion 1322 and the inner surface of the supercharger 12 is the same, thereby preventing the airflow from being decelerated when passing through gaps of different widths.

[0173] Alternatively, when the vane tips 1323 of the extension 1322 are too close to the inner surface of the supercharger 12, the gap width L1 between them can be negligible. Alternatively, the vane tips 1323 of the extension 1322 may directly abut and contact the inner surface of the supercharger 12. In both cases, the gap width L1 is zero. The abutment of the extension 1322 thus improves the stability of the connection between the supercharger 12 and the pressurizing member 13, thereby improving the stability of the airflow between the two.

[0174] Please refer to Figures 3-4 to 3-6. Furthermore, the radial radius of part of the pressurizing seat 131 gradually increases from the end close to the rotating seat 111 to the end away from the rotating seat 111, and the radial radius of the end of the pressurizing seat 131 close to the rotating seat 111 is the same as the radial radius of the end of the front air guide part 1113 close to the pressurizing seat 131.

[0175] It is understandable that the radial radii of the rotating seat 111, the supercharger 12, and part of the pressurizing seat 131 all gradually increase along the wind direction f, and the radial radius of the pressurizing seat 131 gradually increases from the end close to the rotating seat 111 to the end away from the rotating seat 111, with the same value as the radial radius of the front air guide 1113 of the fan assembly 11 close to the pressurizing seat 131. Therefore, the wind flow guided by the front air guide 1113 will not be suddenly blocked or suddenly changed in direction due to the cross section caused by the gap C between the front air guide 1113 and the pressurizing seat 131. This ensures that even when there is a gap C between the front air guide 1113 and the pressurizing seat 131, the wind flow can still be continuously pressurized from the rotating seat 111 to the pressurizing seat 131, thereby achieving stable wind flow output, making the wind flow quality uniform, and reducing wind flow fluctuations caused by discontinuous pressurization due to the gap C. In addition, due to the stable wind flow, the wind noise is low, and a better noise control effect can be achieved.

[0176] Please refer to Figures 3-8. The second embodiment of this scheme also provides a portable fan 3, including the fan blade assembly 1 described in any one of the first embodiments, and also including a motor 14 and a power supply unit 2. The motor 14 is arranged inside the fan blade assembly 1, and the power supply unit 2 is arranged outside the fan blade assembly 1. The power supply unit 2 and the motor 14 are electrically connected to drive the fan assembly 11 to rotate.

[0177] It can be understood that the portable fan 3 includes a fan blade assembly 1 and a power supply unit 2 connected to the fan blade assembly 1. The power supply unit 2 and the motor 14 are electrically connected to supply power to the motor 14, drive the fan assembly 11 to rotate, and blow out airflow. The power supply unit 2 can be a handheld assembly for the user to use by hand, or stand on a plane for use, and the fan blade assembly 1 is used to blow air to the user. In the present embodiment, the portable fan 3 is a handheld fan. Of course, in other embodiments, the portable fan 3 can be a small fan having only the above-mentioned fan blade assembly 1, or it can be a desktop fan, a clip fan, a versatile fan, etc. This embodiment is not limited to this, as long as the power supply unit 2 can supply power to the motor 14 inside the fan blade assembly 1. And because the portable fan 3 includes the fan blade assembly 1 described in any one of the first embodiments, it has the same technical effect as the fan blade assembly 1 in the first embodiment, and this embodiment does not limit this.

[0178] Referring to Figure 3-3 , a mounting groove 1114 is provided on the side of the rotating base 111 near the pressure member 13. A mounting cavity 1311 is provided on the side of the pressure member 13 near the rotating base 111. Mounting groove 1114 and mounting cavity 1311 face each other and form a mounting space within which the motor 14 is housed. The fan assembly 11 is driven by the motor 14 to rotate as a whole, thereby driving the fan blades 112 to rotate.

[0179] It is understandable that the fan assembly 1 further includes a display assembly 18, which is disposed on a side of the pressurizing seat 131 facing away from the fan assembly 11. The display assembly 18 can be used to display at least one of the power level, the current gear position, and the charging status.

[0180] Option 4

[0181] Please refer to Figures 4-1 to 4-4. The first embodiment of the present scheme provides a portable fan 1, which takes in air at the rear end and discharges air at the front end. The portable fan 1 includes a motor assembly 20 and a connecting base 30 connected to each other. The motor assembly 20 includes a bracket 21 and a motor body 22. The bracket 21 includes a fixed disk 211 and a boss 212 arranged on the fixed disk 211. The fixed disk 211 is connected to the connecting base 30, and the motor body 22 is coaxially arranged with the boss 212; the motor body 22 includes a fixing mechanism 221 and a rotating mechanism 222. The fixing mechanism 221 is arranged on the boss 212, and the rotating mechanism 222 is rotatably connected to the fixing mechanism 221. A fan 40 is provided on the side of the rotating mechanism 222 away from the connecting base 30, and the rotating mechanism 222 is fixedly connected to the fan 40.

[0182] As can be understood, since the motor assembly 20 includes a bracket 21 and a motor body 22, the bracket 21 and the motor body 22 form a single motor assembly 20, facilitating modular assembly. By configuring the bracket 21 to include a fixing plate 211 and a boss 212, with the boss 212 being used to connect to the motor body 22, the motor assembly 20 and the connecting base 30 can be assembled simply by connecting the fixing plate 211 to the connecting base 30. When the motor assembly 20 is in operation, the rotating mechanism 222 drives the fan 40 to rotate and provide wind power. The end of the portable fan 1 corresponding to the fan 40 is defined as the rear end, and the end corresponding to the connecting base 30 is defined as the front end. The airflow direction is from the rear end to the front end. Compared with the existing assembly structure in which the motor body 22 is directly assembled with the connecting seat 30, resulting in the assembly involving more parts and having a negative impact on the assembly yield and stability, this solution uses the bracket 21 and the motor body 22 to form a whole motor assembly 20 for assembly, forming the advantage of modular assembly. The boss 212 at one end of the bracket 21 is used to connect the motor body 22, which is conducive to forming a modular motor assembly 20, and the fixed plate 211 at the other end is used to connect with the connecting seat 30, so that the assembly of the motor assembly 20 and the connecting seat 30 is simple and efficient, which can improve the assembly efficiency and assembly yield. The setting of the bracket 21 avoids the direct assembly of the motor body 22 with the connecting seat 30, reduces the negative impact of the assembly process on the stability of the motor body 22 after assembly, and improves the reliability of the portable fan 1.

[0183] Optionally, as a specific embodiment, the connection base 30 is a pressurized base. This helps guide the airflow, resulting in a more concentrated and orderly airflow. It also increases the air pressure, allowing the wind to be more effectively transmitted over a greater distance, thus facilitating long-distance air delivery. Assembling the motor assembly 20 with the pressurized base enhances modular assembly, improves assembly efficiency and yield, and makes the overall structure of the portable fan 1 more compact.

[0184] Optionally, as a specific embodiment, the portable fan 1 includes a handle 12 and a fan head 11 connected thereto. The fan head 11 includes a front cover 111, a housing 112, and a rear cover 113, which are sequentially arranged. The motor assembly 20 and the connecting base 30 are disposed within the space enclosed by the front cover 111, the housing 112, and the rear cover 113. It should be noted that the portable fan 1 can be a handheld fan, a desktop fan, a clip fan, a versatile fan, etc., without limitation herein.

[0185] Please refer to Figures 4-2 to 4-5. Further, the portable fan 1 also includes a shell 112, an air inlet channel 1121 is defined between the fan 40 and the shell 112, and an air outlet channel 1122 is defined between the connecting base 30 and the shell 112. A plurality of connecting blades 33 are arranged between the connecting base 30 and the shell 112, and the diameter of the connecting base 30 close to the motor assembly 20 is less than or equal to the diameter of the connecting base 30 away from the motor assembly 20; the connecting base 30 is provided with a first groove 31 on the side facing the motor assembly 20, and the fixing plate 211 is at least partially arranged in the first groove 31.

[0186] As can be understood, the connecting blades 33 act as wind guides, and the diameter of the end of the connecting base 30 closer to the motor assembly 20 being smaller than or equal to the diameter of the end of the connecting base 30 farther from the motor assembly 20 can act as a pressure-enhancing agent, thereby increasing the air supply distance. By providing a first slot 31 in the connecting base 30 and allowing the fixing plate 211 to extend into the first slot 31, the connection between the connecting base 30 and the fixing plate 211 is further stabilized, preventing relative displacement of the connecting base 30 and the fixing plate 211 due to force. Furthermore, the fixing plate 211 is at least partially disposed within the first slot 31, which also serves to accommodate and protect the fixing plate 211.

[0187] Please refer to Figures 4-2, 4-3 and 4-5. Further, the outer shell 112 includes an outer cover shell 1123 and an inner cover shell 1124. At least part of the inner cover shell 1124 is arranged on the radial inner side of the outer cover shell 1123. A plurality of connecting leaves 33 connect the inner cover shell 1124 and the connecting seat 30. The side surface of the fixed disk 211 includes a connected arc segment 2111 and a straight segment 2112. The straight segment 2112 is provided with a first clip 2113. The first groove 31 is provided with a first clip groove 311 corresponding to the first clip 2113. The first clip 2113 is clipped with the first clip groove 311.

[0188] It can be understood that since at least a portion of the inner housing 1124 is disposed radially inwardly of the outer housing 1123, and the plurality of connecting blades 33 connect the inner housing 1124 and the connecting seat 30, the above arrangement has the advantages of being easy to produce and assemble. Since the straight section 2112 is provided with a first clamping member 2113, and the first groove 31 is provided with a first clamping groove 311 corresponding to the first clamping member 2113, the correspondence between the first clamping member 2113 and the first clamping groove 311 can not only make it easier to align the connecting seat 30 with the fixed disk 211 during assembly, but also the clamping relationship between the first clamping member 2113 and the first clamping groove 311 can firmly fix the fixed disk 211 and the connecting seat 30, thereby preventing relative sliding between the fixed disk 211 and the connecting seat 30 and affecting the structural stability.

[0189] 4-2 and 4-3 , further, a protrusion 312 is provided at one end of the first engaging groove 311 close to the straight section 2112 , and the protrusion 312 protrudes toward the straight section 2112 .

[0190] It can be understood that the protrusion 312 protruding toward the straight section 2112 not only serves as a clamping guide, but also extends the clamping length of the first clamping groove 311. The longer clamping length increases the contact area between the first clamping groove 311 and the first clamping member 2113, making the clamping relationship between the first clamping groove 311 and the first clamping member 2113 closer, thereby improving the stability of the connection structure between the fixed plate 211 and the connecting seat 30.

[0191] Please refer to FIG. 4-3 . Further, one of the first slot 31 and the fixing plate 211 is provided with a limiting hole 2114 , and the other is provided with a limiting member 313 corresponding to the limiting hole 2114 . The limiting hole 2114 is cooperatively connected with the limiting member 313 .

[0192] It can be understood that the limiting hole 2114 and the limiting member 313 are respectively arranged on the fixed plate 211 and the first groove 31. The matching connection between the limiting hole 2114 and the limiting member 313 improves the lateral load bearing capacity, making the connection relationship between the fixed plate 211 and the connecting seat 30 more stable.

[0193] Optionally, as a specific embodiment, the limiting member 313 is arranged in the first groove 31, and the limiting hole 2114 is opened on the fixed disk 211; as another specific embodiment, the limiting member 313 is arranged on the fixed disk 211, and the limiting hole 2114 is opened in the first groove 31.

[0194] Please refer to Figures 4-2 to 4-4. Further, the fixing plate 211 and the connecting seat 30 are provided with corresponding screw holes 51. The portable fan 1 also includes a screw rod 50, which is screwed into the screw hole 51.

[0195] It can be understood that by setting the screw 50 and the screw hole 51 to be screwed together to connect the fixed disk 211 and the connecting seat 30, the connection method of the screw 50 and the screw hole 51 is simple in structure, does not require a complicated assembly process, and is easy to disassemble and assemble, making the assembly of the motor assembly 20 with the connecting seat 30 simple and convenient; at the same time, it can accurately fix the relative position of the fixed disk 211 and the connecting seat 30 to ensure the reliability and tightness of the connection.

[0196] Please refer to Figures 4-3, 4-4 and 4-6. Further, the surface ring where the boss 212 is connected to the fixed disk 211 is provided with a second clip 2121, and the inner surface ring where the fixed disk 211 is connected to the boss 212 is provided with a corresponding third clip 2115. The second clip 2121 and the third clip 2115 are matched and connected.

[0197] It can be understood that since the boss 212 and the fixed disk 211 are connected through the second clip 2121 and the third clip 2115, the contact area and the roughness of the contact surface between the boss 212 and the fixed disk 211 can be increased, so that the boss 212 and the fixed disk 211 are more tightly connected. In an environment where the motor body 22 runs at high speed, micro-wear will not be generated due to vibration conduction of the motor body 22, thereby improving the overall structural strength of the bracket 21.

[0198] Optionally, as a modified embodiment, the second clamping member 2121 and the third clamping member 2115 are integrally formed; as another modified embodiment, the second clamping member 2121 and the third clamping member 2115 are connected by bonding, screwing, welding, etc., which are not limited here.

[0199] Please refer to Figures 4-6. Furthermore, the second clamping member 2121 is a key tooth 2122, the third clamping member 2115 is a key groove 2116, the key teeth 2122 are two groups, and the inner surface of the fixed disk 211 is also provided with two groups of blocking members 2117, which abut against the key teeth 2122 in sequence.

[0200] It can be understood that by setting the number of key teeth 2122 to two groups and setting corresponding stops 2117 on the inner surface of the fixed disk 211, setting the number of key teeth 2122 to two groups can increase the structural strength of the connection, and the stops 2117 and the key teeth 2122 abutting in sequence can prevent the key teeth 2122 from generating axial displacement relative to the key slot 2116, thereby ensuring the stability of the structure.

[0201] Please refer to Figures 4-2, 4-4 and 4-7. Further, the fixing mechanism 221 includes a stator 2211, the rotating mechanism 222 includes a rotor magnetic ring 2221 and a rotating shaft 2222, the stator 2211 is fixedly sleeved on the boss 212, the rotor magnetic ring 2221 is arranged outside the stator 2211, and the rotating shaft 2222 is at least partially rotatable and passed through the boss 212. The fan 40 includes a rotating seat 41 and blades 42, the blades 42 are arranged on the rotating seat 41, the rotor magnetic ring 2221 is fixedly connected to the rotating seat 41, and one end of the rotating shaft 2222 extends out of the boss 212 and is fixedly connected to the rotating seat 41.

[0202] It can be understood that the rotating shaft 2222 is at least partially rotatable and penetrates the boss 212. The boss 212 is hollow to provide a rotating space for the rotating shaft 2222. The rotating seat 41 is fixedly connected to the rotor magnetic ring 2221. One end of the rotating shaft 2222 is connected to the rotating seat 41, so that when the rotor magnetic ring 2221 arranged outside the stator 2211 rotates, it can drive the rotating seat 41 and the blades 42 to rotate, thereby realizing the blowing function of accelerating the air flow.

[0203] Please continue to refer to Figures 4-2, 4-4 and 4-7. Further, a second groove 411 is opened on the side of the rotating seat 41 close to the motor body 22, the boss 212 extends into the second groove 411, the stator 2211 and the rotor magnetic ring 2221 are located in the second groove 411, the rotor magnetic ring 2221 is fixedly connected to the inner wall of the second groove 411, and the end of the rotating shaft 2222 extending from the boss 212 is fixedly connected to the inner bottom wall of the second groove 411.

[0204] It can be understood that by opening the second groove 411, the second groove 411 plays a role in protecting, accommodating and reducing noise for the stator 2211 and the rotor magnet ring 2221. The rotor magnet ring 2221 is fixedly connected to the inner wall of the second groove 411, and one end of the rotating shaft 2222 extending out of the boss 212 is fixedly connected to the inner bottom wall of the second groove 411, so that the rotating seat 41 and the rotor magnet ring 2221 and the rotating shaft 2222 can achieve the same direction rotation with a higher connection strength.

[0205] Please refer to Figure 4-7. Furthermore, the second groove 411 also includes a connecting portion 4111, which bulges toward the boss 212. The connecting portion 4111 is provided with a connecting cavity 4112 corresponding to the rotating shaft 2222. One end of the rotating shaft 2222 extends out of the boss 212 and is plugged into the connecting cavity 4112.

[0206] It can be understood that since the connecting portion 4111 bulges toward the boss 212, the connecting portion 4111 is provided with a connecting cavity 4112 corresponding to the rotating shaft 2222. The raised shape of the connecting portion 4111 can make the connecting cavity 4112 have a deeper cavity depth, thereby improving the connection strength of the rotating shaft 2222 inserted into the connecting cavity 4112, and realizing a tight connection between the rotating seat 41 and the rotating shaft 2222.

[0207] Please continue to refer to Figures 4-7. Furthermore, the motor assembly 20 also includes a bearing 23, which is arranged at both ends of the boss 212. The rotating shaft 2222, the bearing 23 and the boss 212 are coaxially arranged in sequence; an elastic member 24 is sleeved on the rotating shaft 2222, and one end of the elastic member 24 abuts against the second groove 411, and the other end abuts against the bearing 23 facing the second groove 411.

[0208] As can be understood, bearing 23 reduces friction during the rotation of shaft 2222, lowering energy consumption and improving motor efficiency; it also maintains stable rotation of shaft 2222 and reduces vibration. The ends of elastic member 24 abut against rotating base 41 and bearing 23, respectively, and can rotate with rotating base 41 and bearing 23. The elastic member 24 uses its elastic force to prevent axial vibration of rotating base 41, helping to reduce operating noise and enhance the user experience.

[0209] Optionally, as a specific implementation, the elastic member 24 is a spring.

[0210] Please continue to refer to Figures 4-7. Further, a gap 60 is left between the connecting seat 30 and the rotating seat 41, and the gap 60 is between 1 mm and 3 mm; the direction from the motor assembly 20 to the connecting seat 30 is defined as the air outlet direction, and the radial direction of the rotating seat 41 increases along the air outlet direction, and the maximum diameter of the rotating seat 41 is less than or equal to the maximum diameter of the connecting seat 30.

[0211] As can be understood, the gap 60 between the connecting base 30 and the rotating base 41 ensures that the rotating base 41 maintains a safe distance from the connecting base 30 during operation, so that the connecting base 30 does not obstruct the normal operation of the rotating base 41. At the same time, the air generated by the fan 40 is smoothly delivered to the connecting base 30, reducing air loss. The radial direction of the rotating base 41 increases along the air outlet direction, and the maximum diameter of the rotating base 41 is less than or equal to the maximum diameter of the connecting base 30. This can appropriately increase the wind pressure and facilitate increasing the air supply distance.

[0212] 4-2 and 4-5 , further, the stator 2211 includes a motor support 2212 and a winding 2214 . The motor support 2212 is fixedly sleeved on the boss 212 . The motor support 2212 is surrounded by a plurality of winding portions 2213 , and the winding 2214 is wound around the winding portions 2213 .

[0213] It can be understood that when the current in the winding 2214 changes, a changing magnetic field will be generated. Since the rotor magnetic ring 2221 is a permanent magnet, the rotating magnetic field of the stator 2211 will interact with the magnetic field of the rotor magnetic ring 2221 to generate torque, causing the rotor magnetic ring 2221 to rotate, and then drive the rotating seat 41 to rotate to achieve blowing.

[0214] Please refer to Figures 4-2 to 4-4. Further, the fixed disk 211 and the connecting base 30 are provided with corresponding through holes 70, and the connecting base 30 is provided with a third slot 32 on the side away from the fixed disk 211. The portable fan 1 also includes a circuit board 80 and a wire 81. The circuit board 80 is arranged in the third slot 32, and the wire 81 passes through the through hole 70. The two ends of the wire 81 are respectively connected to the circuit board 80 and the motor body 22.

[0215] As can be understood, the circuit board 80 can be responsible for current commutation, switching the current in each motor phase by controlling the electronic components on the circuit board 80; as well as controlling and regulating the motor's speed and torque. The third slot 32 provides a protective housing for the circuit board 80. The through-hole 70 for the wire 81 facilitates the connection between the circuit board 80 and the motor body 22 on either side of the connector 30. Of course, in other embodiments, the circuit board 80 could also be responsible for displaying one or more of the following: the portable fan's operating status, battery level, wind speed, or lighting.

[0216] Plan 5

[0217] Please refer to Figures 5-1 and 5-2. The first embodiment of this scheme provides a pressure piece 10, including: a pressure seat 11, the radial radius of at least a part of the pressure seat 11 gradually increases along the axial direction of the pressure piece 10; a plurality of stationary blades 12, which are arranged at intervals on the pressure seat 11; and a connecting cover 13, which surrounds the outside of the pressure seat 11 through the stationary blades 12; wherein the axial length W1 of the stationary blades 12 (as shown in W1 in Figure 5-2) is greater than the axial length W2 of the pressure seat 11 (as shown in W2 in Figure 5-2).

[0218] Specifically, the connecting cover 13 is a hollow annular structure because it can be wrapped around the outside of the pressure seat 11. After a plurality of static blades 12 are arranged at intervals and connected to the connected connecting cover 13, the intervals between any two adjacent static blades 12 form a plurality of air outlets for the airflow pressurized by the pressure member 10 to enter the outside world. The provided connecting cover 13 can realize the connection between the pressure member 10 and other components of the portable fan 3. In addition, it can also fix the static blades 12 on the pressure seat 11 to prevent the static blades 12 from shaking, thereby strengthening the structural strength of the overall pressure member 10 to reduce vibration and make the entire fan blade assembly 1 run more stably and smoothly.

[0219] It can be understood that the axial length W1 of the stator blade 12 is the length of the entire length of the stator blade 12 in the axial direction of the pressure member 10. The axial length W2 of the pressure seat 11 is the length of the entire length of the pressure seat 11 in the axial direction of the pressure member 10. The radial radius of at least part of the pressure seat 11 of the pressure member 10 is gradually increased along the axial direction of the pressure member 10, so that the wind sent out by the fan is gradually pressurized and accelerated on the pressure seat 11, which is beneficial to combing the wind flow, so that the wind flow can be continuously pressurized and accelerated more smoothly through the pressure seat 11, so as to enhance the stability of the wind flow and make the oncoming wind feel more uniform; and by setting the axial length W1 of the stator blade 12 on the pressure seat 11 to be greater than the axial length W2 of the pressure seat 11, at least one end of the stator blade 12 can extend out of the pressure seat 11 in the radial direction relative to the pressure seat 11, and the stator blade 12 is axially extended in the direction away from the connecting cover 13. When the static blades 12 extend out of the pressurizing seat 11, they can penetrate deeper into the interior of the portable fan relative to the pressurizing seat 11, ensuring that even when the closest distance between the pressurizing seat 11 and the fan assembly 40 has reached its limit, the static blades 12 can still extend out of the pressurizing seat 11 to reduce the gap between the static blades 12 and the blades 42 on the fan assembly 40 in the portable fan 3, thereby reducing the air guide and air supply distance between the pressurizing member 10 as a whole and the fan assembly 40 in the portable fan 3, so as to better efficiently transfer the airflow sent by the blades 42 to the pressurizing member 10, thereby reducing the loss of the air volume sent by the fan when it is transmitted between the fan and the pressurizer. When the static blades 12 extend axially out of the pressurizing seat 11 in the direction close to the connecting cover 13, the air guide distance of the pressurizing member in the air outlet area can be increased, which is more conducive to air guidance.

[0220] Please refer to FIG5-1. Specifically, the stator blade 12 includes a stator blade tip 122, a stator blade root 121, a stator blade head 125, and a stator blade tail 124. The stator blade root 121 is the end connected to the pressurizing seat 11; the stator blade tip 122 is the end away from the stator blade root 121; the stator blade tail 124 and the stator blade head 125 are arranged in sequence along the axial direction of the pressurizing member 10. The wind direction f (as shown in FIG5-2 ) can be defined as the direction of the wind flow in the axial direction of the pressurizing member 10, that is, the direction of the air flow in the axial direction of the pressurizing member 10 from flowing into the pressurizing member 10 to flowing out of the pressurizing member 10. The stator blade tail 124 and the stator blade head 125 are also arranged in sequence along the wind direction f, so that the wind flow sent out by the fan assembly 40 passes through the stator blade tail 124 and the stator blade head 125 in sequence.

[0221] Please refer to Figures 5-1 and 5-2. Furthermore, the axial length W1 of the stator blade 12 gradually increases from the stator blade root end 121 to the stator blade top end 122, and ensure that the axial length of at least part of the stator blade 12 in the increased part is greater than the axial length W2 of the pressure seat 11, so that at least one end of the stator blade 12 can extend radially outside the pressure seat 11.

[0222] As can be understood, the axial length W1 of the stator blade 12 gradually increases from the stator blade root end 121 to the stator blade tip 122, so that the length and area of ​​the stator blade 12 extending outside the pressurizing seat 11 gradually increase from the stator blade root end 121 to the stator blade tip 122, thereby gradually increasing the air guide area extending outside the pressurizing seat 11, thereby facilitating efficient air guidance. In addition, this increasing direction coincides with the direction in which the air volume supplied by the blades 42 of the fan assembly 40 gradually increases from the stator blade root end 121 to the stator blade tip 122, thereby ensuring that the air supply and air guide energy between the two correspond and provide a smoother transition.

[0223] Please refer to Figures 5-1 and 5-2. Furthermore, the axial length of the static blade root end 121 of the static blade 12 is equal to the axial length of the pressure seat 11, and the axial length of the static blade tip 122 of the static blade 12 is greater than the axial length of the pressure seat 11.

[0224] It can be understood that the axial length of the static blade root end 121 of the static blade 12 is set to be equal to the axial length of the pressure seat 11, so that the static blade root end 121 of the static blade 12 is set in contact with the surface of the pressure seat 11 without protruding from the boundaries of the two ends of the pressure seat 11, avoiding the protrusion of the blade root and increasing the width of the gap between the pressure seat 11 and the fan, and also making the pressure part 10 more beautiful as a whole; and by setting the axial length of the static blade top end 122 of the static blade 12 to be greater than the axial length of the pressure seat 11, it is ensured that the static blade 12 is at least partially extended out of the pressure seat 11 in the radial direction. In this embodiment, the axial length of the stator blade root end 121 of the stator blade 12 is preferably set to be equal to the axial length of the pressure seat 11, and the axial length of the stator blade 12 is gradually increased from the stator blade root end 121 to the stator blade tip 122, so that the axial length of the stator blade 12, except for the stator blade root end 121 connected to the surface of the pressure seat 11, is greater than the axial length of the pressure seat 11. As a result, the wind-guiding distance between the stator blade tail end 124 of the stator blade 12 and the fan blade 42 on the fan assembly 40 gradually decreases in the direction from the stator blade root end 121 to the stator blade tip 122, and reaches the minimum distance at the blade tip angle 123. Therefore, the pressure member 10 provided in this embodiment can minimize the wind-guiding distance between the stator blade 12 on the pressure seat 11 and the blade on the fan without affecting the gap between the pressure member 10 and the fan assembly 40, and increase the wind-guiding area between the fan blade 42 and the stator blade 12, thereby achieving efficient wind guidance between the fan assembly 40 and the pressure seat 11.

[0225] Please refer to Figure 5-2. Furthermore, the stationary blade 12 includes a connecting portion 126 and an extension portion 127. The extension portion 127 corresponds to the portion of the pressurizing seat 11 where the radial radius gradually increases; the stationary blade tip 122 of the connecting portion 126 is connected to the connecting cover 13, and the stationary blade root end 121 of the connecting portion 126 is connected to the pressurizing seat 11; the stationary blade tip 122 of the extension portion 127 is not connected to the connecting cover 13, and the stationary blade root end 121 of the extension portion 127 is connected to the pressurizing seat 11. The extension portion 127 extends axially in the direction in which the radial radius of the pressurizing seat 11 gradually decreases to extend out of the pressurizing seat 11.

[0226] It can be understood that the stator blade 12 includes a connecting portion 126 that connects the pressure seat 11 and the connecting cover 13 at both ends, and an extension portion 127 that is connected to the connecting portion 126 at one end and extends out of the pressure seat 11 at the other end. The axial extension of the extension portion 127 can extend in the direction of gradually decreasing radial radius of the pressure seat 11 to extend out of the pressure seat 11, so that part of the airflow sent out by the fan blade 42 on the fan assembly 40 first passes through the stator blade tail end 124 of the stator blade 12 and then is guided to the outside along the pressure seat 11. Thereby, the wind guidance between the fan blade 42 and the stator blade 12 is achieved. The setting of the connecting portion 126 and the extension portion 127 enables the two to respectively achieve the connection function with the connecting cover 13 and the wind guidance function between the stator blade 12 on the fan assembly 40, avoiding the mutual influence between the wind guidance at the rear end 112 of the pressure member 10 and the connection at the front end 111.

[0227] It should be noted that the connection portion 126 and the extension portion 127 of the stationary blade 12 are integrally structured, and the entire pressurizing member 10 can be integrally molded, thereby improving the overall strength of the pressurizing member 10. The integrally molded connection portion 126 and extension portion 127 of the stationary blade 12 can respectively perform the connection function and the air guide function. Furthermore, the integral structure formed by the connection portion 126 and extension portion 127 further facilitates a more natural transition of the airflow introduced by the extension portion 127 to the connection portion 126 and thereby to the outside world, further reducing noise.

[0228] Please refer to FIG. 5-3 . Furthermore, the connecting portion 126 is linear, and the extending portion 127 is arc-shaped. The radial height h (as shown in FIG. 3 ) of the extending portion 127 increases in sequence along the direction in which the radial radius of the pressurizing seat 11 gradually decreases.

[0229] It can be understood that the connection portion 126 is set to a radial straight line, so that the connection portion 126 has better strength and rigidity, can effectively resist the axial load of the connection cover 13, and improve the firmness and stability of the connection between the two. Setting the extension portion 127 to be arc-shaped can more effectively guide the airflow sent out by the stator blades 12 on the fan assembly 40, and increase the smoothness and stability of the airflow. At the same time, each stator blade 12 naturally transitions from an arc shape to a straight line, so that the airflow enters the extension portion 127 and the connection portion 126 in sequence from a mixed direction airflow state, and after being combed, it can form a direct current wind that is blown out in parallel to the axial direction of the pressure seat 11, thereby increasing the blowing distance, reducing turbulence, noise and vibration, reducing the noise emitted by turbulent crosstalk, and achieving noise reduction, so as to convert sharp noise into a low sound.

[0230] It should be noted that the radial height of the extension portion 127 is increased in sequence along the direction in which the radial radius of the pressurizing seat 11 gradually decreases, and it is ensured that the static blade tips 122 of the extension portion 127 at various positions remain flush, thereby ensuring the stability of the static blade tips 122 at various positions of the extension portion 127 when connected to the remaining components.

[0231] Please refer to FIG. 5-4 . Furthermore, the installation angle α (as shown in FIG. 5-4 ) of the extension portion 127 of the stationary blade 12 is 20°-25°.

[0232] It can be understood that setting the installation angle α of the extension portion 127 to 20°-25° can achieve a natural transition between the arc-shaped extension portion 127 and the straight-line connection portion 126 on the stator blade 12, avoiding the influence of the presence of folded angles on the wind flow, and achieving effective wind guidance of the wind flow sent out by the blades on the fan assembly 40. It can also achieve a natural transition of the wind flow from the arc-shaped extension portion 127 to the straight-line connection portion 126, making the wind guidance and wind combing of the stator blade 12 more natural and smooth.

[0233] Please refer to Figure 5-3. Furthermore, the pressure seat 11 includes a front end 111 and a rear end 112. The boundary radial diameter D1 of the outer surface of the front end 111 of the pressure seat 11 (as shown in Figure 5-4, D1) is 36mm-40mm, and the boundary radial diameter D2 of the outer surface of the rear end 112 of the pressure seat 11 (as shown in Figure 5-4, D2) is 31mm-35mm. This defines the upper and lower limits of the pressurization of the pressure member 10, so that the airflow passing through the pressure seat 11 can be smoothly pressurized within a smaller range, thereby making the final airflow speed and pressure more stable.

[0234] Specifically, the pressurizing seat 11 includes a front end 111 and a rear end 112, the radial radius of the rear end 112 gradually increases in the direction approaching the front end 111, and the radial radius of the front end 111 is greater than the radial radius of the rear end 112; the front end 111 and the rear end 112 correspond to the static blade root end 121 of the connecting part 126 and the static blade root end 121 of the extension part 127 respectively.

[0235] It can be understood that the surface of the front end 111 can be parallel to the axis of the pressure piece 10, and the radial radius of the rear end 112 gradually increases to the radial radius of the front end. When the windflow is between the extension parts 127, the windflow introduced by the extension part 127 of the static blade 12 can be gradually pressurized, so that the pressurization process of the windflow by the pressure piece 10 is more balanced; and when the windflow of the static blade 12 enters the connecting part 126, when the windflow passes through the front end 111, the windflow can form a direct current wind parallel to the axial direction of the pressure piece 10 through the front end 111 parallel to the axial direction, thereby achieving not only the continuous pressurization of the windflow delivered by the fan assembly 40 through the pressure piece 10, but also the direction of the pressurized windflow can be guided.

[0236] It should be noted that the portion where the connecting shroud 13 connects to the stationary blade 12 corresponds to the front end 111 of the pressurizing seat 11. The connecting shroud 13 extends away from the rear end 112 of the pressurizing seat 11, extending out of the pressurizing seat 11 and into the outside world, forming an air diffuser 131. The interior of the air diffuser 131 is in a smooth arc shape. The extension direction of the connecting shroud 13 is opposite to the extension direction of the extension portion 127 of the stationary blade 12. The radial radius of the air diffuser 131 gradually increases along the extension direction of the connecting shroud 13 and forms a smooth arc surface structure, which is more conducive to smoother air discharge from the air diffuser 131 and expands the range of air discharge.

[0237] Please refer to FIG. 5-4 . Furthermore, the distance L (as shown in FIG. 5-4 ) between the outer surface of the front end 111 of the pressurizing seat 11 and the inner surface of the connecting cover 13 is 5.8 mm to 7.8 mm.

[0238] It can be understood that by limiting the distance between the outer surface of the front end 111 of the pressurizing seat 11 and the inner surface of the connecting cover 13 to 5.8mm-7.8mm, the size of the final air outlet 131 is limited, so that the air outlet 131 within this range can effectively concentrate the airflow, increase the wind speed, and make the user feel a stronger wind sensation.

[0239] Furthermore, the axial length of the pressure seat 11 is 20.7 mm-22.7 mm, and the axial length of the stationary blade 12 is 23.2 mm-25.2 mm.

[0240] It can be understood that by limiting the maximum axial length range of the pressure seat 11 and the static blade 12, the extension length of the static blade 12 beyond the pressure seat 11 is limited, thereby ensuring the wind-guiding distance between the static blade 12 and the fan blade 42 within this range, so that the static blade 12 on the pressure member 10 can achieve a better wind-guiding effect.

[0241] Please refer to Figures 5-5 and 5-6. The second embodiment of the present scheme also provides a portable fan 3, including the pressure member 10 described in any one of the first embodiments, and also including a fan assembly 40. The fan assembly 40 and the pressure member 10 are arranged in sequence along the axial direction. The fan assembly 40 includes a rotating seat 41 and a plurality of fan blades 42. The radial radius of at least part of the rotating seat 41 gradually increases along the axial direction of the rotating seat 41.

[0242] It can be understood that the pressure member 10 in the first embodiment can be used inside the portable fan 3 and arranged in sequence along the axial direction with the fan assembly 40 inside the portable fan 3, so that the wind flow entering the portable fan 3 passes through the fan assembly 40 and the pressure member 10 in sequence, so that the wind flow entering the portable fan 3 first passes through the rotation of the fan assembly 40 to output a strong wind flow to the pressure member 10, so that the pressure member 10 guides the wind flow to the pressure member 10 through the extension 127 of the static blade 12, and then the pressure member 10 continues to pressurize and speed up the wind flow before sending it out of the portable fan 3 to the outside. The fan assembly 40 can be an axial flow fan, a diagonal flow fan, or a centrifugal fan, and this embodiment does not limit this. The portable fan 3 includes any one of the pressure members 10 in the first embodiment and has the same technical effects as the pressure member 10 in the first embodiment, and this embodiment does not limit this.

[0243] It should be noted that, in this embodiment, the portable fan 3 can be a handheld portable fan, or a small fan having only the above-mentioned pressure member 10, or a desktop fan, a clip fan, a versatile fan, etc., and this embodiment does not impose any restrictions on this.

[0244] Optionally, the portable fan 3 may include a fan assembly 1 and a power supply 2 connected to the fan assembly 1. The pressure member 10 and the fan assembly 40 are both disposed within the fan assembly 1. The power supply 2 is disposed outside the fan assembly 1 and electrically connected to the motor 70, providing power to the motor 70 and driving the fan assembly 40 to rotate and produce airflow. The power supply 2 may be a handheld assembly for use by a user or for use standing on a flat surface, while the fan assembly 1 is used to blow air toward the user.

[0245] Specifically, a mounting groove 43 is provided on the side of the rotating base 41 near the pressure member 10, and a mounting cavity 113 is provided on the side of the pressure member 10 near the rotating base 41. The mounting groove 43 and the mounting cavity 113 are opposite to each other and form a mounting space, and the motor 70 is accommodated in the mounting space. Specifically, the power supply unit 2 supplies power to the motor 70, which drives the fan assembly 40 as a whole to rotate, thereby driving the fan blades 42 to rotate.

[0246] Optionally, the fan blade assembly 1 further includes a display assembly 90, which is disposed on a side of the pressurizing seat 11 facing away from the fan assembly 40. The display assembly 90 can be used to display at least one of the power level, the current gear position, and the charging status.

[0247] Plan 6

[0248] Please refer to Figures 6-1 to 6-3. The first embodiment of this scheme provides a fan blade assembly 1, including: a pressure member 13, including a pressure seat 131 and a plurality of static blades 132, and the plurality of static blades 132 are spaced apart on the radial outside of the pressure seat 131; a fan assembly 11, and the pressure member 13 are arranged in sequence along the axial direction, the fan assembly 11 includes a rotating seat 111 and a plurality of fan blades 112, the rotating seat 111 includes a rear air guide portion 1111, a fan blade connection portion 1112 and a front air guide portion 1113 arranged in sequence along the wind direction, and the plurality of fan blades 112 are spaced apart on the radial outside of the fan blade connection portion 1112; a supercharger 12, which is internally penetrated and surrounds the periphery of the fan assembly 11; wherein, a first gap C (as shown in C in Figure 6-2) is formed axially between the pressure seat 131 and the front air guide portion 1113, and the static blades 132 extend axially backward across the first gap C and extend to the radial outside of the front air guide portion 1113.

[0249] Specifically, the supercharger 12 is a hollow structure, which surrounds the radial periphery of the fan assembly 11 and the pressure member 13 to enclose both the fan assembly 11 and the pressure member 13, so that the boosting and speeding up of the wind flow is carried out inside the supercharger 12. The fan assembly 11 rotates to drive the fan blades 112 to rotate so as to achieve high-speed flow of the wind flow entering the supercharger 12 from the rear air guide portion 1111, thereby sending high-speed wind flow to the pressure member 13. The fan assembly 11 can be an axial flow fan or a diagonal flow fan, which is not limited in this embodiment. The pressure member 13 is fixed in the current position to achieve wind guidance between the fan assembly 11, and to boost and speed up the wind flow sent out by the fan assembly 11. The static blades 132 on the pressure seat 131 will also be fixed in the current position and remain motionless to achieve wind guidance and combing of the wind flow sent out by the fan blades 112. And in order to avoid affecting the rotation of the fan assembly 11, there is a first gap between the pressure seat 131 and the rotating seat 111 of the fan assembly 11, so as to ensure the rotation effect of the fan assembly 11. The rotating seat 111 includes a rear air guide portion 1111, a blade connecting portion 1112 and a front air guide portion 1113 arranged in sequence along the axial direction. Inside the blade assembly 1, the wind direction f (as shown in FIG6-2 f) can be defined as the direction of the wind flow in the fan assembly 11 in the axial direction of the fan assembly 11, that is, the rear air guide portion 1111, the blade connecting portion 1112 and the front air guide portion 1113 of the rotating seat 111 can be arranged in sequence along the wind direction. The pressure piece 13 and the fan assembly 11 can be arranged in sequence in the opposite direction of the wind direction f, that is, the fan assembly 11 and the pressure piece 13 can be arranged in sequence along the wind direction f. The rear air guide 1111 directs a portion of the airflow entering the supercharger 12 along its surface to the fan blade connection portion 1112, where it is accelerated by the fan blades 112. A portion of the airflow released by the fan blades 112 is directed along the front air guide 1113 to the surface of the pressure seat 131. The front air guide 1113 is directly opposite the pressure seat 131, meaning that the first gap C is actually the gap between the front air guide 1113 and the end of the pressure seat 131 closest to the fan assembly 11.

[0250] It can be understood that the static blades 132 of the pressurizing seat 131 extend beyond the first gap C formed between the pressurizing seat 131 and the fan assembly 11, and extend to a position corresponding to 1 / 3 of the front air guide portion 1113 or beyond a position corresponding to 1 / 3 of the front air guide portion 1113. The static blades 132 on the pressure seat 131 extend beyond the first gap C and directly extend into the radially outer side of the front air guide portion 1113, that is, between the front air guide portion 1113 and the inner surface of the supercharger 12, thereby reducing the distance between the static blades 132 on the pressure seat 131 and the blades 112 on the fan assembly 11, so that most of the wind flow sent by the fan blades 112 is directly sent to the pressure member 13 through the static blades 132, ensuring the wind volume and wind speed of the wind guided between the pressure member 13 and the fan assembly 11, so that the wind flow sent by the fan assembly 11 is pressurized and accelerated with the cooperation of the supercharger 12, so as to send a stronger wind flow to the outside, thereby finally sending a strong wind flow through the setting of the pressure member 13 and the supercharger 12, so that the final wind flow has high wind speed, high wind pressure and high wind force, thereby solving the problem that the wind force and wind speed of some existing portable fans are usually small and the cooling effect may not be sufficient to meet the needs of users. In addition, compared with some existing portable fans that can perform turbo wind gathering, in this embodiment, the static blades 132 on the pressurizing seat 131 extend beyond the first gap C and directly extend into the radial outer side of the front air guide portion 1113, thereby reducing the loss of the air flow sent by the fan blades 112 in the gap between the pressurizing seat 131 and the rotating seat 111, thereby increasing the amount of air sent out; and the position where the static blades 132 extend to the front air guide portion 1113 is at least 1 / 3 of the position corresponding to the front air guide portion 1113, ensuring that the static blades 132 extend into the front air guide portion 1113 and the pressurizing seat 131. The wind guide area and wind guide volume of the inner surface of the device 12 are designed to ensure the air volume delivered between the fan blades 112 and the static blades 132, and the air volume guided between the surface of the front wind guide portion 1113 and the surface of the pressurizing seat 131 is reduced, thereby reducing the loss of the air volume delivered by the fan blades 112 at the first gap C, so as to avoid as much as possible the existence of gaps inside the existing portable fan capable of turbo wind gathering, so that the air flow delivered by the fan blades 112 will be dispersed or disturbed by the existence of the cross-section at the gap, and the air flow will be discontinuous at the cross-section, resulting in a reduction in wind speed.

[0251] It should be noted that in this embodiment, the pressure seat 131 can be coaxial with the rotating seat 111, that is, the axes of the two can coincide, so that the position correspondence between the pressure seat 131 and the rotating seat 111 is more accurate, thereby making the wind guiding energy between the two more balanced and stable.

[0252] More specifically, the fan blade assembly 1 in this embodiment may also include a shell 15, which also has a hollow through-structure, specifically forming an air inlet end 151 and an air outlet end 152 according to the wind direction f. The outer surface of the supercharger 12 is connected to the inner surface of the shell 15, and the fan assembly 11 and the pressure member 13 correspond to the air inlet end 151 and the air outlet end 152 of the shell 15, respectively. That is, the fan assembly 11 is arranged closer to the air inlet end 151 relative to the pressure member 13, and the pressure member 13 is arranged closer to the air outlet end 152 relative to the fan assembly 11. The supercharger 12 is a structure that is independent of the shell 15 and is used to pressurize and speed up the airflow, so that in this embodiment, the supercharger 12 is used to gradually pressurize the airflow in conjunction with the pressure seat 131 and the rotating seat 111, thereby increasing the wind pressure and wind speed of the airflow finally delivered. Instead of the shell 15 gradually pressurizing the airflow in conjunction with the pressure seat 131 and the rotating seat 111. In addition, the provision of the supercharger 12 enables the fan blade assembly 1 to form a double-layer structure, which is more conducive to reducing noise and facilitates obtaining a high-pressure, low-noise portable fan 3.

[0253] Please refer to FIG. 6-2 . Furthermore, the rear end of the stationary blade 132 is radially mapped to a position within a range of 1 / 3 to 2 / 3 of the front air guide portion 1113 .

[0254] It can be understood that the rear end of the stator blade 132 is the end closest to the fan assembly 11, that is, the portion of the stator blade 132 extending radially outward from the front air guide 1113. This portion has a blade tip, which is the point on the stator blade 132 closest to the blade 112 of the fan assembly 11. By mapping the blade tip to a position within the range of 1 / 3 to 2 / 3 of the front air guide 1113, the stator blade 132 is ensured to extend through the first gap C between the pressure seat 131 and the rotating seat 111 and enter between the front air guide 1113 and the supercharger 12. Within this position range, the stator blade 132 can extend to the front air guide 1113 and always maintain a certain distance from the stator blade 132 on the fan assembly 11. Furthermore, the stator blade 132 has an air guide area corresponding to the position range of the front air guide 1113, thereby ensuring an effective air guide effect. This avoids the influence of the part of the static blade 132 extending to the front air guide portion 1113 on the rotation of the fan assembly 11. That is, under the premise that this position range can avoid the influence of the extension of the static blade 132 on the fan assembly 11, the best effective air-guiding effect with the airflow delivered by the fan blade 112 is achieved.

[0255] Please refer to Figures 6-2 and 6-4. Furthermore, the range of the first gap is 1.5-2.5 mm. By limiting the range of the first gap, the first gap can be reduced as much as possible while avoiding contact with the fan assembly 11, thereby minimizing the loss of air volume delivered by the fan assembly 11 at the first gap.

[0256] Please refer to Figures 6-2 and 6-4. Further, the stator blade 132 includes a stator blade tail end 1326 at the rear end. The stator blade 132 also includes a radially inner stator blade root end 1324 and a radially outer stator blade top end 1323. The stator blade tail end 1326 extends obliquely from the stator blade root end 1324 to the stator blade top end 1323.

[0257] Specifically, the stator blade 132 includes a stator blade tip 1323, a stator blade root end 1324, a stator blade head end 1325, and a stator blade tail end 1326. The stator blade root end 1324 is the radially inner end of the stator blade 132, that is, the end connected to the pressurizing seat 131; the stator blade tip 1323 is the radially outer end of the stator blade 132, that is, the end away from the stator blade root end 1324, that is, the end close to the inner surface of the supercharger 12; the stator blade head end 1325 is the end away from the fan assembly 11 and corresponds to the air outlet end 152 of the housing 15; and the stator blade tail end 1326 is the end close to the fan assembly 11. That is, the vane head end 1325 is closer to the air outlet end 152 of the shell 15 than the vane tail end 1326. Therefore, along the direction close to the air outlet end 152 of the shell 15, the vane head end 1325 of the vane 132 is at the front end, and the vane tail end 1326 of the vane 132 is at the rear end.

[0258] As can be understood, the stator blade tail end 1326 extends obliquely from the stator blade root end 1324 toward the stator blade tip 1323, thereby achieving an inclined arrangement of the stator blade tail end 1326 of the stator blade 132, tilting the stator blade tail end 1326 toward the fan assembly 11. This causes the radial length of the portion of the stator blade 132 extending between the front air guide 1113 and the inner surface of the supercharger 12 to gradually decrease from the stator tip 1323 toward the stator blade root end 1324, and the stator blade root end 1324 is the end that does not extend beyond the pressure seat 131. This maximizes the distance between the stator blade root end 1324 and the front air guide 1113, which also falls within the range of the first gap between the pressure seat 131 and the front air guide 1113. This inclined arrangement prevents the stator blade 132 from contacting the rotating seat 111 due to its extension, thereby preventing the extension of the stator blade 132 from affecting the rotation of the fan assembly 11. In addition, the inclined setting makes the area of ​​the static blades 132 extending into the front air guide portion 1113 gradually increase in the direction away from the pressure seat 131, thereby gradually increasing the air guide area extending out of the pressure seat 131, facilitating efficient air guidance.

[0259] Please refer to Figures 6-2 and 6-4. Furthermore, the fan blade 112 includes a front blade head end 1123, and a second gap P (as shown in Figure 6-4) is formed axially between the static blade tail end 1326 and the fan blade head end 1123. The second gap P gradually decreases from the static blade root end 1324 to the static blade top end 1323.

[0260] Specifically, the fan blade 112 includes a blade tip 1121, a blade root 1122, a blade head end 1123, and a blade tail end 1124. The blade root end 1122 is the end connected to the fan blade connection portion 1112; the blade tip 1121 is the end away from the blade root end 1122, that is, the end close to the inner surface of the supercharger 12; the blade head end 1123 is the end close to the pressure member 13; and the blade tail end 1124 is the end away from the pressure member 13 and corresponds to the air outlet 152 of the housing 15 and the air inlet 1231 of the supercharger 12. That is, the fan blade head end 1123 is closer to the air outlet end 152 of the shell 15 than the fan blade tail end 1124. Therefore, along the direction close to the air outlet end 152 of the shell 15, the fan blade head end 1123 of the fan blade 112 is at the front end, and the fan blade tail end 1124 of the fan blade 112 is at the rear end.

[0261] It can be understood that there is a second gap P between the static blade 132 of the pressure member 13 and the fan blade 112, which can ensure that there is no direct contact between the static blade 132 and the fan blade 112, thereby avoiding the influence of the static blade 132 on the rotation of the fan blade 112. The direction in which the second gap P decreases can be the same as the direction in which the axial length of the static blade tail end 1326 of the static blade 132 gradually increases, so that the wind guide distance between the static blade 132 and the fan blade 112 gradually decreases in the direction away from the rotating seat 111. The reduction in the wind guide distance is more conducive to efficient wind guidance between the fan blade 112 and the static blade 132. In addition, the direction in which the wind guide distance decreases corresponds to the direction in which the air volume supplied by the fan blade 112 on the fan assembly 11 gradually increases from the fan blade root end 1122 to the fan blade top end 1121, thereby enabling a smoother transition of the air supply and guide energy between the two.

[0262] Please refer to Figure 6-4. Furthermore, the range of the second gap P is 1.5-10 mm, thereby ensuring that there is no direct contact between the static blades 132 and the fan blades 112, and the air-guiding distance between the fan blades 112 and the static blades 132 is reduced as much as possible to achieve the optimal air-guiding effect.

[0263] Please refer to Figures 6-3 to 6-5. Furthermore, the stationary blade 132 includes an arc-shaped extension portion 1322 and a linear connection portion 1321. The connection portion 1321 extends radially to connect to the supercharger 12; the bending direction of the extension portion 1322 is opposite to the bending direction of the stationary blade 132.

[0264] Specifically, the connection portion 1321 is provided to connect the supercharger 12, which can realize the connection between the pressure member 13 and other components of the portable fan 3, and at the same time fix the static blades 132 on the pressure seat 131. The connection between the connection portion 1321 and the supercharger 12 can prevent the static blades 132 from shaking, thereby strengthening the structural strength of the overall pressure member 13, reducing vibration, and making the entire fan blade assembly 1 run more stably and smoothly. When the connection portion 1321 is in a straight line, the straight line is a shape perpendicular to the surface of the connection cover and the pressure seat 131, which can make the connection portion 1321 have better strength and rigidity, effectively resist the axial load of the supercharger 12, and improve the firmness and stability of the connection between the two. When the extension portion 1322 is in an arc shape, it can more effectively guide the airflow sent out by the blades on the fan, and increase the smoothness and stability of the airflow. Setting the bending direction of the extension portion 1322 opposite to the bending direction of the static blades 132 is conducive to achieving a natural arc transition between the fan blades 112 and the static blades 132, so that the airflow sent out by the fan blades 112 can more easily enter between the static blades 132 and be combed by the static blades 132 to form a direct current wind to enter the outside world.

[0265] Please refer to Figures 6-6 and 6-7. Further, the installation angle β of the fan blade 112 (β as shown in Figure 6-7) is greater than the installation angle β of the extension portion 1322 (α as shown in Figure 6-6). The installation angle β of the fan blade 112 is 32-53°, and the installation angle α of the extension portion 1322 is 14-30°.

[0266] It is understandable that when the installation angle β of the fan blade 112 is greater than the installation angle α of the extension portion 1322, the curvature of the fan blade 112 is greater than the curvature of the static blade 132, which is conducive to the wind flow sent by the fan blade 112 being able to be more smoothly introduced into the space between the static blades 132, so as to reduce the energy loss of the wind flow when turning, and make the wind flow smoother, so that the wind flow can maintain a higher speed after entering between the static blades 132, thereby forming a stronger wind pressure and enhancing the air supply effect. In addition, the smooth wind guidance of the wind flow at both times can effectively reduce noise. In addition, the smaller installation angle of the fan blade 112 can be conducive to achieving the transition between the curved extension portion 1322 and the straight connection, making the transition at the connection more natural. In addition, by setting the angle range of the installation angle β of the fan blade 112 and the installation angle α of the extension portion 1322, the bending degree of the fan blade 112 and the extension portion 1322 is limited, so that the bending degree of the fan blade 112 and the extension portion 1322 within the set range can achieve better air supply and air guidance effects.

[0267] Please refer to Figures 6-8 and 6-9. Furthermore, the distance L between the blade tip 1121 of the fan blade 112 and the inner surface of the supercharger 12 (as shown in L in Figure 6-9) is 0.5-3 mm. Within this range, it can be ensured that there is no direct contact between the fan blade 112 and the inner surface of the supercharger 12, and the distance L between the blade tip 1121 of the fan blade 112 and the inner surface of the supercharger 12 is shortened as much as possible to reduce the diffusion of the airflow delivered by the fan blade 112 between the top of the fan blade 112 and the supercharger 12, thereby ensuring the wind speed and air volume delivered by the fan assembly 11.

[0268] Specifically, in this embodiment, the number of fan blades 112 is greater than the number of stator blades 132, so that the spacing between adjacent fan blades 112 is greater than the spacing between adjacent stator blades 132, resulting in a larger air guide range between the stator blades 132, which is more conducive to air guidance between the fan blades 112 and the stator blades 132. In addition, the larger spacing between adjacent stator blades 132 can reduce the resistance of the airflow between the stator blades 132, thereby improving the working efficiency of the fan blade assembly 1 and obtaining a stronger air output.

[0269] It can be understood that the supercharger 12 includes an air inlet 1231 and an air outlet 1211, and the radial diameter of the supercharger 12 gradually increases from the air inlet 1231 to the air outlet 1211. The supercharger 12 includes a first cover 121, a second cover 122 and a third cover 123 that are axially connected in sequence, the first cover 121 surrounds the outside of the pressurizing seat 131, and a plurality of stationary blades 132 are spaced apart outside the pressurizing seat 131 and connected to the first cover 121. The fan blade assembly 1 also includes a rear cover 17, which is connected to the shell 15 and the second cover 122 through the third cover 123. The first cover 121, the second cover 122 and the third cover 123 are all hollow structures, so the supercharger 12 formed by the connection of the three can surround the radial periphery of the pressurizing seat 131 and the fan assembly 11. The first cover 121 corresponds to the air outlet end 152 of the shell 15 and the pressure member 13 to form an air outlet 1211, and the third cover 123 corresponds to the air inlet end 151 of the shell 15 to form an air inlet 1231. The two ends of the second cover 122 are respectively connected to the first cover 121 and the third cover 123, and the outer surface of the second cover 122 is in contact with the inner surface of the shell 15.

[0270] Please refer to Figures 6-10. The second embodiment of this scheme also provides a portable fan 3, which includes the fan blade assembly 1 described in any one of the first embodiments, and also includes a motor 14 and a power supply unit 2. The motor 14 is arranged inside the fan blade assembly 1, and the power supply unit 2 is arranged outside the fan blade assembly 1. The power supply unit 2 and the motor 14 are electrically connected to drive the fan assembly 11 to rotate.

[0271] It can be understood that the portable fan 3 includes a fan blade assembly 1 and a power supply unit 2 connected to the fan blade assembly 1. The power supply unit 2 and the motor 14 are electrically connected to supply power to the motor 14, drive the fan assembly 11 to rotate, and blow out airflow. The power supply unit 2 can be a handheld assembly for the user to use by hand, or stand on a plane for use, and the fan blade assembly 1 is used to blow air to the user. In the present embodiment, the portable fan 3 is a handheld fan. Of course, in other embodiments, the portable fan 3 can be a small fan having only the above-mentioned fan blade assembly 1, or it can be a desktop fan, a clip fan, a versatile fan, etc. This embodiment is not limited to this, as long as the power supply unit 2 can supply power to the motor 14 inside the fan blade assembly 1. And because the portable fan 3 includes the fan blade assembly 1 described in any one of the first embodiments, it has the same technical effect as the fan blade assembly 1 in the first embodiment, and this embodiment does not limit this.

[0272] Referring to Figure 6-3 , a mounting groove 1114 is provided on the side of rotating base 111 near pressure member 13, and a mounting cavity 1311 is provided on the side of pressure member 13 near rotating base 111. Mounting groove 1114 and mounting cavity 1311 face each other and form a mounting space, in which motor 14 is housed. Fan assembly 11 is driven by motor 14 to rotate as a whole, thereby driving blades 112 to rotate.

[0273] It is understandable that the fan assembly 1 further includes a display assembly 18, which is disposed on a side of the pressurizing seat 131 facing away from the fan assembly 11. The display assembly 18 can be used to display at least one of the power level, the current gear position, and the charging status.

[0274] Plan 7

[0275] Please refer to Figures 7-1 to 7-3. The first embodiment of the present scheme provides a fan blade assembly 1, including: a shell 15, which is internally connected and includes an air inlet end 151 and an air outlet end 152; a pressure member 13, including a pressure seat 131 and a plurality of stationary blades 132; a fan assembly 11, which is arranged in sequence along the axial direction with the pressure member 13, and the fan assembly 11 includes a rotating seat 111 and a plurality of fan blades 112; a supercharger 12, which is arranged inside the shell 15 and is internally connected and surrounds the radial periphery of the fan assembly 11 and the pressure member 13; wherein, in the axial direction from the air inlet end 151 to the air outlet end 152, an airflow channel 161 is formed between the inner surface of the supercharger 12 and the outer surface of the rotating seat 111 and the outer surface of the pressure seat 131, and the cross-sectional area of ​​the airflow channel 161 gradually decreases.

[0276] Specifically, the shell 15 is a hollow through-structure, the air inlet end 151 is a port for the external airflow to enter the interior of the shell 15, and the air outlet end 152 is a port for the airflow entering the interior of the shell 15 to be discharged to the outside. The fan assembly 11 can accelerate the airflow entering the supercharger 12 from the air inlet end 151 by rotating and then send it out. The fan assembly 11 can be an axial flow fan or a diagonal flow fan, and this embodiment does not limit this. The airflow direction f (as shown in FIG7-2 f) can be defined as the direction of the airflow in the fan assembly 11 in the axial direction of the fan assembly 11, that is, the direction of the airflow along the axial direction of the fan assembly 11 flowing into the fan assembly 11 to flowing out of the fan assembly 11, that is, the axial direction from the air inlet end 151 to the air outlet end 152. A first gap C is formed between the pressure member 13 and the fan assembly 11 (as shown in C in FIG7-2 ), that is, the fan assembly 11 and the pressure member 13 are sequentially arranged along the wind direction f, so that the fan assembly 11 and the pressure member 13 correspond to the air inlet end 151 and the air outlet end 152 of the housing 15, respectively. That is, the fan assembly 11 is arranged close to the air inlet end 151 relative to the pressure member 13, and the pressure member 13 is arranged close to the air outlet end 152 relative to the fan assembly 11. The pressure seat 131 and the stationary blades 132 of the pressure member 13 correspond to the rotating seat 111 and the blades 112 of the fan assembly 11, respectively, so that the airflow sent out from the blades 112 on the fan assembly 11 is sent out through the pressure member 13. The pressure member 13 is fixed in the current position to achieve wind guidance between the fan assembly 11 and to supercharge and speed up the airflow sent out by the fan assembly 11. The static blades 132 on the pressurizing seat 131 will also be fixed at the current position and remain stationary, so as to guide and comb the airflow sent out by the fan blades 112.

[0277] More specifically, the outer surface of the supercharger 12 is connected to the inner surface of the housing 15, so that the housing 15 surrounds the radial periphery of the supercharger 12, and the supercharger 12 surrounds the radial periphery of the fan assembly 11 and the pressure member 13, so that the pressure and speed of the airflow are increased inside the supercharger 12. The supercharger 12 is a structure that is independent of the housing 15 and is used to pressurize the airflow. Therefore, in this embodiment, the supercharger 12 cooperates with the pressure seat 131 and the rotating seat 111 in sequence to achieve gradual pressure and speed increase of the airflow, thereby increasing the wind pressure and wind speed of the airflow finally delivered. Instead of the housing 15 and the pressure seat 131 and the rotating seat 111 in sequence to achieve gradual pressure increase of the airflow. In addition, the arrangement of the supercharger 12 forms a double-layer structure of the supercharger 12 and the housing 15, which is more conducive to reducing noise and facilitating the acquisition of a high-pressure, low-noise portable fan 3.

[0278] It can be understood that the radial radius of the partial rotating seat 111 of the fan assembly 11 and the partial pressurizing seat 131 near one end of the rotating seat 111 are increased in sequence along the airflow direction, and the increasing direction of the radial radius is the same as the setting direction of the fan assembly 11 and the pressurizing member 13, so that the radial radius of the pressurizing seat 131 is larger than the radial radius of the rotating seat 111, so that the width of the airflow channel 161 formed between the inner surface of the supercharger 12 and the rotating seat 111 is larger than the width of the airflow channel 161 formed between the inner surface of the supercharger 12 and the pressurizing seat 131 , thereby making the cross-sectional area of ​​the airflow channel 161 formed between the inner surface of the supercharger 12 and the rotating seat 111 larger than the cross-sectional area of ​​the airflow channel 161 formed between the inner surface of the supercharger 12 and the pressurizing seat 131, so that the cross-sectional area of ​​the airflow channel formed inside the fan blade assembly 1 decreases successively along the flow direction of the airflow, thereby realizing the gradual pressurization and acceleration of the airflow along the direction of the airflow in the airflow channel, making the pressurization and acceleration of the airflow in the fan blade assembly 1 more balanced, thereby evenly increasing the wind pressure and wind speed, so that the wind pressure and wind speed of the airflow finally blown out of the fan blade assembly 1 can be more stable.

[0279] Please refer to Figure 7-2. Furthermore, the range of the first gap C between the pressure member 13 and the fan assembly 11 is 1.5-2.5 mm, so as to avoid contact with the fan assembly 11 while reducing the first gap C as much as possible through the range of the first gap C, thereby minimizing the loss of the air volume delivered by the fan assembly 11 at the first gap C.

[0280] Please refer to Figure 7-2. Furthermore, the axial length S1 of the supercharger 12 (as shown in S1 in Figure 7-2) is greater than the sum of the axial lengths S2 of the fan assembly 11 and the pressure member 13 (as shown in S2 in Figure 7-2); the radial radius of the supercharger 12 gradually increases along the flow direction of the wind.

[0281] It can be understood that the axial length S1 of the supercharger 12 is greater than the sum of the axial lengths S2 of the fan assembly 11 and the pressure member 13, so that the supercharger 12 can surround the entire fan assembly 11 and the pressure seat 131, so that the airflow can be pressurized and accelerated on the fan assembly 11 and the pressure member 13. By setting the radial radius of the supercharger 12 to gradually increase along the flow direction of the wind, the direction of increase of the radial radius of the supercharger 12 is consistent with the direction of decrease of the radial radius of the pressure seat 131 and the rotating seat 111; and the increase of the radial radius of the supercharger 12 is less than the increase of the radial radius of the rotating seat 111 and the pressure seat 131, thereby avoiding the situation where the increase of the radial radius of the supercharger 12 gradually reduces the width and cross-sectional area of ​​the wind channel 161 along the axial direction, thereby ensuring that the inner surface of the supercharger 12 can adapt to the shape of the surface of the pressure seat 131 and the rotating seat 111, so that the width and cross-sectional area of ​​the entire wind channel 161 can be reduced more smoothly, thereby making the process of pressurizing the wind more stable, ensuring the stability of the wind during the supercharging and speeding process, reducing the fluctuation and vortex phenomenon of the wind, and improving the stability of the overall wind. In addition, the supercharger 12 can also form a double-layer structure with the shell 15, further protecting the fan assembly 11 and the pressure member 13 and reducing noise.

[0282] Referring to Figure 7-2 , the axial length S1 of the supercharger 12 is 50.5-58.5 mm. This overall length of the supercharger 12 ensures a range of pressure and speed boosting for the airflow within the supercharger 12, thereby providing sufficient pressure and speed boosting for a stronger and more stable airflow. Furthermore, the axial length S1 minimizes the overall volume occupied by the fan assembly 1, facilitating miniaturization of the entire fan assembly 1.

[0283] Please refer to Figure 7-2. Furthermore, the supercharger 12 includes a first cover 121, a second cover 122 and a third cover 123 which are axially connected in sequence. The first cover 121 surrounds the outside of the pressurizing seat 131, and a plurality of stationary blades 132 are spaced apart outside the pressurizing seat 131 and connected to the first cover 121; the inner surfaces of the first cover 121, the second cover 122 and the third cover 123 smoothly transition to form a first airflow channel surface 16; the outer surface of the pressurizing seat 131 and the outer surface of the rotating seat 111 smoothly transition to form a second airflow channel surface 19, and an airflow channel 161 is formed between the first airflow channel surface 16 and the second airflow channel surface 19.

[0284] Specifically, the first cover 121, the second cover 122, and the third cover 123 are all hollow structures, so the supercharger 12 formed by the connection of the three can surround the radial periphery of the pressurizing seat 131 and the fan assembly 11. The first cover 121 corresponds to the air outlet end 152 connected to the shell 15, and the third cover 123 corresponds to the air inlet end 151 connected to the shell 15. The two ends of the second cover 122 are respectively connected to the first cover 121 and the third cover 123, and the outer surface of the second cover 122 abuts the inner surface of the shell 15. After the multiple stationary blades 132 are spaced apart outside the pressurizing seat 131 and connected to the first cover 121, multiple air outlets are formed between any two adjacent stationary blades 132, the first cover 121, and the pressurizing seat 131, allowing the airflow that has been pressurized and accelerated by the supercharger 12 and the pressurizing member 13 to enter the outside world. First cover 121 is connected to the air outlet end 152 of housing 15. It connects not only to housing 15 but also to pressure member 13, facilitating smoother airflow into the environment. This ensures that first cover 121 connects to the other components of fan assembly 1 while also securing stationary blades 132 on pressure seat 131, preventing them from shaking. This strengthens the overall structural strength of pressure member 13, reduces vibration, and ensures smoother and more stable operation of the entire fan assembly 1.

[0285] It can be understood that the smooth transition between the first, second, and third covers 121, 122, and 123 is achieved by maintaining a flush relationship between the inner surface of the first cover 121 and the outer surface of the second cover 122 at their junction, and by maintaining a flush relationship between the inner surface of the second cover 122 and the outer surface of the third cover 123 at their junction. The smooth transition between the outer surface of the pressurizing seat 131 and the outer surface of the rotating seat 111 is achieved by gradually increasing the radial radius of the pressurizing seat 131 and the rotating seat 111, rather than decreasing. This allows for a more natural transition at each junction and gap in the airflow channel 161 formed between the first and second airflow channel surfaces 16, 19. This allows for smoother flow within the airflow channel 161 during pressurized flow, reducing air volume loss and increasing the rate of wind speed increase. In addition, the first airflow channel surface 16 and the second airflow channel surface 19 formed by smooth transition can reduce wind resistance and wind noise.

[0286] It should be noted that the first airflow channel surface 16 protrudes radially to form an arc surface. The setting of the arc surface is conducive to guiding the airflow, and at the same time, it can also facilitate the airflow to flow more smoothly when passing through the arc surface, thereby making the airflow sent out by the fan blade 112 stronger and more stable; in addition, it can also reduce noise. The protruding position of the arc surface corresponds to the gap between the fan blade 112 and the static blade 132, thereby slightly increasing the volume of the gap, so that the airflow sent out by the fan blade 112 can be temporarily buffered at this location, and after buffering, it enters the space between the supercharger 12 and the pressure member 13 along the arc surface for continued supercharging before being sent out, thereby effectively guiding the airflow, reducing the formation of vortexes, improving the stability of the airflow flowing into the space between the pressure member 13 and the inner surface of the supercharger 12, and further reducing the loss of airflow in the gap between the fan blade 112 and the static blade 132.

[0287] More specifically, the portion of the supercharger 12 with a gradually increasing radial radius is the second cover 122. The second cover 122 can surround the entire fan assembly 11 and at least part of the pressurizing seat 131, or surround the entire fan assembly 11 and the entire pressurizing seat 131. This further avoids the influence of the connection positions of the first cover 121, the second cover 122, and the third cover 123 on the boosting and speeding of the airflow. The protruding position of the arc surface formed by the first airflow channel surface 16 is located on the inner surface of the second cover 122. A plurality of reinforcing ribs 1221 are arranged at intervals on the outer wall of the supercharger 12, and the reinforcing ribs 1221 abut against the inner wall of the shell 15, thereby further strengthening the structural strength of the supercharger 12 through the reinforcing ribs 1221. The height of the reinforcing ribs 1221 gradually decreases along the airflow direction, so that the outer surface of the supercharger 12 adapts to the state in which the shell 15 is parallel to the fan assembly 11.

[0288] Please refer to Figures 7-2 to 7-4. Further, the air inlet 1231 and the air outlet 1211 of the supercharger 12 are arranged corresponding to the air inlet end and the air outlet end 152 of the shell 15. The radial diameter of the supercharger 12 gradually increases from the air inlet 1231 to the air outlet 1211, so that the arc surface transition of the first airflow channel surface 16 is more natural and smooth, and the airflow sent out by the fan blades 112 is gradually pressurized, making the process of pressurizing the airflow more stable, ensuring the stability of the airflow during the pressurization process, thereby reducing the fluctuation and vortex phenomenon of the airflow and improving the overall stability of the airflow; and by setting the radial diameter D1 of the air inlet 1231 of the supercharger 12 (as shown in Figure 7-2 D1) to 44.9-48.9mm, and the radial diameter D2 of the air outlet 1211 (as shown in Figure 7-2 D2) to 53.4-57.4mm, the radial diameter range of the supercharger 12 is limited, thereby limiting the upper and lower limits of the supercharger 12, avoiding the supercharger range being too large or too small to affect the stability of the airflow and generate greater noise.

[0289] Optionally, the connection between the first cover 121, the second cover 122 and the third cover 123 can be a fixed connection or a detachable connection. This embodiment does not impose any restrictions on this. It is sufficient that the connection between the first cover 121, the second cover 122 and the third cover 123 can form a supercharger 12.

[0290] Optionally, when the first cover 121, the second cover 122, and the third cover 123 are detachably connected, the rear cover 17 is fixedly connected to the third cover 123, and the pressure member 13 is fixedly connected to the first cover 121. The two ends of the second cover 122 are detachably connected to the first cover 121 and the third cover 123, respectively, thereby facilitating the assembly and disassembly of the fan blade assembly 1.

[0291] Please combine Figure 7-3 and Figure 7-6. Further, from the air inlet end 151 to the air outlet end 152, the rotating seat 111 includes a rear air guide portion 1111, a fan blade connecting portion 1112 and a front air guide portion 1113 arranged in sequence along the axial direction, and a plurality of fan blades 112 are distributed at intervals on the fan blade connecting portion 1112; from the rear end of the rear air guide portion 1111 to the front end of the fan blade connecting portion 1112, the radial radius of the rotating seat 111 gradually increases.

[0292] Specifically, blades 112 are spaced apart on the surface of rotating base 111 and spirally extend in a direction of increasing radial radius of rotating base 111. The rear air guide 1111 more evenly directs the portion of airflow entering supercharger 12 onto blades 112. The front air guide 1113 more evenly directs the portion of airflow accelerated by blades 112, reducing airflow loss caused by cross-section at the root of blades 112.

[0293] It can be understood that the radial radius of the rotating seat 111 gradually increases from the rear end of the rear air guide portion 1111 to the front end of the fan blade connection portion 1112, thereby achieving a gradual increase in pressure and speed of the wind flow from the rear end of the rear air guide portion 1111 to the front end of the fan blade connection portion 1112, avoiding a sudden increase in speed during the rotation of the fan blade 112, and making the increase in pressure and speed process more natural. In addition, the gradually increasing radial radius can make the surface transition of the rotating seat 111 more natural, so as to improve the lift efficiency of the fan blade 112, reduce resistance, and reduce the loss of air volume on the surface of the rotating seat 111, thereby achieving a better operating effect of the fan assembly 11. In addition, the rotating seat 111 as a whole can be in the shape of a semi-ellipsoid, which can effectively guide the wind flow to reduce eddy currents and turbulence during mixed flow operation, thereby improving the smoothness and stability of the wind flow, and helping to maximize the air volume and wind pressure generated by the fan assembly 11.

[0294] Specifically, the magnitude of the increase in the radial radius of the front air guide portion 1113 is negligible compared to the magnitude of the increase in the radial radius of the rear air guide portion 1111 and the fan blade connection portion 1112. That is, even if the radial radius of the front air guide portion 1113 remains constant, it can be the same as the maximum radius range or maximum value of the fan blade connection portion 1112, and the surface of the front air guide portion 1113 can be parallel to the axis of the rotating seat 111, so that the wind passing through the surface of the front air guide portion 1113 can easily form a direct current wind parallel to the axis of the rotating seat 111. In addition, the constant radial radius of the front air guide portion 1113 is more conducive to maintaining the wind speed of the wind flow derived from the surface of the fan blade connection portion 1112.

[0295] Please refer to Figure 7-4. Further, a boost zone is formed inside the supercharger 12; the boost zone includes the area from the rear end of the rear air guide 1111 to the front end of the pressurizing seat 131, and the axial length M of the boost zone (as shown in Figure 7-4) is 42.6-50.6mm.

[0296] As can be understood, providing a pressurized zone to achieve airflow boosting and acceleration can avoid localized excessively high or low airflow velocities and reduce unnecessary airflow interference, making the entire boosting and acceleration process smoother. Furthermore, limiting the axial length M of the pressurized zone to 42-46 mm allows for smooth boosting and acceleration of the airflow within the fan assembly 1 over a relatively short distance within this range, facilitating the miniaturization of the fan assembly 1, resulting in a more aesthetically pleasing and portable structure.

[0297] Please refer to Figure 7-6. Furthermore, the axial length P2 of the fan blade connecting portion 1112 (as shown in Figure 7-6, P2) may be greater than the axial length P3 of the front air guide portion 1113 (as shown in Figure 7-6, P3) and the axial length P1 of the rear air guide portion 1111 (as shown in Figure 7-6, P1) to more effectively promote air flow, reduce airflow separation, and thus improve the overall airflow efficiency and wind pressure of the fan assembly 11. Moreover, the axial length P3 of the front air guide portion 1113 is greater than the axial length P1 of the rear air guide portion 1111, thereby ensuring the air guiding length of the front air guide portion 1111, facilitating the airflow sent out through the fan blades 112 along the front air guide portion 1113, so as to improve the stability of the wind speed and air volume of the airflow sent out by the fan blades 112, avoid the front air guide portion 1113 being too short to affect the wind speed and air volume of the airflow sent out by the fan blades 112, and further reduce the air volume loss caused by the cross-section of the airflow sent out at the root position of the fan blade 12.

[0298] Optionally, the axial length of the fan blade connecting portion 1112 is between 1 / 2 and 3 / 4 of the overall axial length P0 of the rotating seat 111 (as shown in P0 in Figure 7-6), so that the fan blade connecting portion 1112 occupies at least half of the surface of the rotating seat 111, thereby ensuring the overall spiral extension length of the fan blade 112 on the rotating seat 111, thereby ensuring the overall spiral extension length of the fan blade 112 on the rotating seat 111, thereby ensuring that the fan blade 112 can provide stronger airflow, deliver a larger air volume and increase the airflow boosting effect.

[0299] Please refer to Figure 7-6. Further, the axial length P0 of the rotating seat 111 is 21-25mm; the axial length of the fan blade 112 is the axial length P2 of the fan blade connection part, and the axial length P2 of the fan blade connection part 112 is 12-16mm. The control of this range satisfies that the axial length of the fan blade 112 is within the range of 1 / 2 to 3 / 4 of the axial length of the rotating seat 111, and further refines the axial length P2 of the fan blade connection part 1112 and the axial length P0 of the rotating seat 111, thereby ensuring the overall quality of the final fan assembly 11, so as to ensure the air supply performance and reliability of the fan assembly 11.

[0300] Please refer to Figures 7-8. Furthermore, a mounting groove 1114 is provided on the inner side of the rotating seat 111. The groove wall of the mounting groove 1114 and the rotating seat 111 form a double-layer structure. The mounting groove 1114 is used to install the motor assembly.

[0301] Specifically, the double-layer structure includes a rotating seat 111 on which the fan blades 112 are set and a groove wall of the mounting groove 1114. The radial radius of the ring formed by the rotating seat 111 is larger than the radial radius of the ring formed by the groove wall of the mounting groove 1114, and the rotating seat 111 and the groove wall of the mounting groove 1114 are connected by multiple connecting structures arranged at intervals, thereby improving the stability between the two-layer structure. Other components of the portable fan 3, such as the motor assembly, can be installed in the mounting groove 1114. This is to achieve the connection between the fan assembly 11 and other components without affecting the rotation of the fan assembly 11, and by setting the ring side corresponding to the mounting groove 1114 on the pressurizing seat 131 to be a double-layer structure, the protection effect of the components inside the mounting groove 1114 is improved. At the same time, the double-layer structure is also used to reduce the noise of the components located in the mounting groove 1114.

[0302] Referring to Figures 7-6 and 7-7, the fan blade 112 further includes a fan blade tip 1121, a fan blade root end 1122, a fan blade head end 1123, and a fan blade tail end 1124. The fan blade root end 1122 is the end connected to the fan blade connection portion 1112; the fan blade tip 1121 is the end away from the fan blade root end 1122, that is, the end close to the inner surface of the supercharger 12; the fan blade head end 1123 is the end close to the pressure member 13; and the fan blade tail end 1124 is the end away from the pressure member 13 and corresponds to the air outlet end 152 of the housing 15. The installation angle β of the blade root end 1122 of the fan blade 112 (as shown in FIG7-6 β) is 32-37 degrees; the installation angle γ of the blade tip 1121 of the fan blade 112 (as shown in FIG7-7 γ) is 47-53 degrees, which can ensure the degree of curvature of the fan blade 112 on the fan blade connection portion 1112 to achieve the maximum air supply volume and wind speed. In addition, the installation angle β of the blade root end 1122 is smaller than the installation angle γ of the blade tip 1121, so that the curvature of the blade tip 1121 on the fan blade 112 is greater than the curvature of the blade root end 1122, thereby increasing the kinetic energy of the wind flow at the blade tip 1121 to enhance the wind pressure output.

[0303] Please refer to Figure 7-5. Furthermore, the gap width G1 (as shown in G1 in Figure 7-5) between the blade tip 1121 of the fan blade 112 and the inner surface of the supercharger 12 is 0.5-3 mm. Within this range, it can be ensured that there is no direct contact between the fan blade 112 and the inner surface of the supercharger 12, and the distance between the blade tip 1121 of the fan blade 112 and the inner surface of the supercharger 12 is shortened as much as possible to reduce the diffusion of the airflow delivered by the fan blade 112 between the top of the fan blade 112 and the supercharger 12, thereby ensuring the wind speed and air volume delivered by the fan assembly 11.

[0304] Please refer to Figures 7-8. Furthermore, the radial radius R1 of the rotating seat 111 at the position corresponding to the blade head end 1123 of the fan blade 112 (as shown in R1 in Figure 7-4) is 14.45-18.45 mm, the radial radius R2 of the rotating seat 111 at the position corresponding to the blade tail end 1124 of the fan blade 112 (as shown in R2 in Figure 7-4) is 8-12 mm, and the radial radius R3 of the boundary part of the rear air guide portion 1111 (as shown in R3 in Figure 7-4) is 2.62-6.62 mm. The increase in the radial radius of the fan blade connection part 1112 is smaller than the increase in the rear air guide part 1111, and the slope from the fan blade connection part 1112 to the front air guide part 1113 is made flatter, which is conducive to the rapid generation and rapid pressurization of wind flow on the fan blade connection part 1112. When the fan blade 112 guides the wind flow, part of the wind flow guided along the surface of the fan blade connection part 1112 can be smoothly guided along the front air guide part 1113, which is conducive to achieving more stable pressurization and speed-up of the wind flow, and further reducing noise.

[0305] Please refer to Figures 7-6 and 7-9. Furthermore, among any two adjacent fan blades 112, the blade head end 1123 of one fan blade 112 is mapped correspondingly between the blade tail end 1124 and the blade head end 1123 of the other fan blade 112 along the axial direction of the rotating seat 111, so that the air guide channels between any two adjacent fan blades 112 cannot form an air guide route parallel to the axis L of the rotating seat 111, thereby avoiding the wind flow passing straight through between the two adjacent fan blades 112, so as to increase the wind guide length and the curvature of the wind guide route between the two adjacent fan blades 112, which is conducive to delivering a larger air volume, faster speed and stronger air flow.

[0306] It should be noted that the number of blades 112 on the fan assembly 11 is an odd number, for example, it can be 7, 9, 11, etc., which can be set according to actual conditions, and this embodiment does not impose any restrictions on this. Setting the number of blades 112 to an odd number can reduce resonance and enhance stability, and avoid the problem that an even number of blades will resonate when rotating at high speed, leading to blade fatigue or even breakage. Moreover, setting the number of blades 112 to an odd number can form a more complex and effective airflow pattern during rotation, thereby enhancing the air supply effect of the fan assembly 11. In this embodiment, the number of blades 112 is greater than the number of stator blades 132, so that the spacing between adjacent blades 112 is greater than the spacing between adjacent stator blades 132, so that there is a larger air guide range between the stator blades 132, which is more conducive to the air guide between the fan blades 112 and the stator blades 132. In addition, the larger spacing between adjacent stator blades 132 can reduce the resistance of the airflow between the stator blades 132, thereby improving the working efficiency of the fan blade assembly 1 and obtaining a stronger air volume output.

[0307] Please refer to FIG7-4. Further, the outer diameter of the front air guide portion 1113 close to the pressure seat 131 is less than 2 mm from the outer diameter of the pressure seat 131 close to the rotating seat 111, thereby reducing the gap between the outer diameters of the front air guide portion 1113 close to the pressure seat 131 and the outer diameter of the pressure seat 131 close to the rotating seat 111, and ensuring as much as possible that the maximum radial radius of the rotating seat 111 increasing along the wind direction is the initial radial radius of the pressure seat 131 increasing along the wind direction, so that the rotating seat 111 and the pressure seat 131 are close to each other. The radial radius of 31 increases continuously and incrementally along the wind direction, resulting in a continuous and decreasing decrease in the width of wind channel 161. This also results in a continuous and incremental increase in the pressure of the wind within wind channel 161. This further balances the pressure increase throughout wind channel 161, providing a more uniform wind output, avoiding sudden fluctuations in the wind during the pressure increase and acceleration process, and reducing eddies and turbulence in the wind, resulting in a more stable airflow. Furthermore, the smooth airflow reduces vibration and noise.

[0308] Please refer to Figure 7-2. Furthermore, a rear cover 17 is provided on the air inlet end, and a protrusion 171 is provided on the side of the rear cover 17 facing the inside of the shell 15. The outer diameter of the protrusion 171 is larger than the outer diameter of the rear end of the rear air guide part 1111, and smaller than the outer diameter of the front end of the rear air guide part 1111 on the rotating seat 111.

[0309] It can be understood that the fan blade assembly 1 includes a rear cover 17, which is connected to the housing 15 and the second cover 122 through the third cover 123. The rear cover 17 covers the air inlet end of the housing 15. The front end of the rear air guide portion 1111 is the end away from the fan blade connection portion 1112, and the front end of the rear air guide portion 1111 is the end connected to the fan blade connection portion 1112. The diameter of the protrusion 171 on the rear cover 17 is larger than the outer diameter of the rear end of the rear air guide portion 1111, that is, larger than the outer diameter of the end of the rear air guide portion 1111 away from the fan blade connection portion 1112, and smaller than the outer diameter of the remaining part of the rotating seat 111 except the rear end of the rear air guide portion 1111, that is, smaller than the outer diameter of the front end of the rotating seat 111 close to the pressurizing seat 131, so that the airflow entering the supercharged interior along the protrusion 171 will not be blocked by the cross-section of the rotating seat 111 at the end close to the rear cover 17, but will be directly introduced along the outer surface of the pressurizing seat 131, so that the airflow of the entire fan assembly 11 can be introduced into the fan blades 112 more easily and smoothly.

[0310] Please refer to FIG. 7-2 and FIG. 7 - 4 . Further, the stationary blades 132 extend axially out of the pressurizing seat 131 and extend to between the front air guide portion 1113 and the first air flow channel surface 16 .

[0311] Specifically, the stator blade 132 includes a stator blade tip 1323, a stator blade root end 1324, a stator blade head end 1325, and a stator blade tail end 1326. The stator blade root end 1324 is the end connected to the pressurizing seat 131; the stator blade tip 1323 is the end away from the stator blade root end 1324, that is, the end close to the inner surface of the supercharger 12; the stator blade head end 1325 is the end away from the fan assembly 11 and corresponds to the air outlet end 152 of the housing 15; and the stator blade tail end 1326 is the end close to the fan assembly 11.

[0312] Referring to Figures 7-11 and 7-12, the axial length W1 of the stationary vane 132 (as shown in Figure 7-9, W1) is the length of the entire length of the stationary vane 132 in the axial direction of the pressure member 13. The axial length W2 of the pressure seat 131 (as shown in Figure 7-9, W2) is the length of the entire length of the pressure seat 131 in the axial direction of the pressure member 13. The axial length W1 of the stationary vane 132 is greater than the axial length W2 of the pressure seat 131, so that at least one end of the stationary vane 132 can extend radially outside the pressure seat 131. Moreover, the axial length of the root end 1324 of the static blade 132 is equal to the axial length of the pressure seat 131, so that the axial length W1 of the static blade 132 gradually increases from the root end 1324 to the top end 1323 of the static blade, so that the static blade tail end 1326 of the static blade 132 close to the fan blade 112 is inclined toward the fan blade 112, and ensure that the axial length of at least part of the static blade 132 in the increased part is greater than the axial length W2 of the pressure seat 131, so that at least one end of the static blade 132 can extend radially out of the pressure seat 131.

[0313] Please refer to Figures 7-10 to 7-12. The stationary blade 132 includes a connecting portion 1321 and an extending portion 1322. The connecting portion 1321 is located between the pressurizing seat 131 and the first cover 121, and the extending portion 1322 corresponds to the portion of the pressurizing seat 131 where the radial radius gradually increases; the stationary blade tip 1323 of the connecting portion 1321 is connected to the first cover 121, and the stationary blade root end 1324 of the connecting portion 1321 is connected to the pressurizing seat 131; the stationary blade tip 1323 of the extending portion 1322 is not connected to the first cover 121, and the stationary blade root end 1324 of the extending portion 1322 is connected to the pressurizing seat 131. The extension portion 1322 extends axially in a direction that gradually decreases along the radial radius of the pressure seat 131, extending beyond the pressure seat 131 and axially extending between the front air guide portion 1113 and the first airflow channel surface 16. This allows a portion of the airflow delivered by the blades 112 on the fan assembly 11 to first pass through the static blade tail ends 1326 of the static blades 132 before being directed outward along the pressure seat 131. This reduces the distance between the static blades 132 on the fan assembly 11 and the blades 112 on the pressure seat 131, thereby enabling the airflow delivered by the blades 112 to be more efficiently transferred to the pressure member 13. Furthermore, since the static blades 132 extend through the gap between the pressure seat 131 and the rotating seat 111, the blades 112 directly transfer the airflow to the static blades 132 on the rotating seat 111, further reducing the loss of the airflow delivered by the blades 112 in the gap between the pressure seat 131 and the rotating seat 111, thereby increasing the delivered air volume. When the connecting portion 1321 of the stationary blade 132 axially extends out of the pressurizing seat 131 in a direction away from the extending portion 1322 , the air guiding distance of the pressurizing member 13 in the air outlet area can be increased, which is more conducive to air guiding.

[0314] It should be noted that although the extension portion 1322 of the stator blade 132 of the pressure member 13 extends to between the front air guide portion 1113 and the first airflow channel surface 16, a second gap Z (as shown in FIG7-5 ) is always formed axially between the stator blade tail end 1326 and the fan blade head end 1123 to ensure that there is no direct contact between the stator blade 132 and the fan blade 112, thereby avoiding the influence of the stator blade 132 on the rotation of the fan blade 112. Moreover, the second gap Z gradually decreases from the stator blade root end 1324 to the stator blade tip 1323 of the stator blade 132. The direction in which the second gap Z decreases can be the same as the direction in which the axial length of the stator blade tail end 1326 of the stator blade 132 gradually increases, thereby causing the wind guide distance between the stator blade 132 and the fan blade 112 to gradually decrease in the direction away from the rotating seat 111. The reduction in the wind guide distance is more conducive to efficient wind guide between the fan blade 112 and the stator blade 132. In addition, the direction in which the air guide distance decreases corresponds to the direction in which the air volume supplied by the blades 112 on the fan assembly 11 gradually increases from the blade root end 1122 to the blade top end 1121, thereby enabling a smoother transition in the air supply and guide energy between the two.

[0315] Please refer to Figure 7-5. Furthermore, the range of the second gap Z is 1.5-10 mm, which not only ensures that there is no direct contact between the static blades 132 and the fan blades 112, but also reduces the air-guiding distance between the fan blades 112 and the static blades 132 as much as possible to achieve the optimal air-guiding effect.

[0316] Furthermore, the axial length W2 of the pressurizing seat 131 is 20.7 mm to 22.7 mm, and the axial length W1 of the stator blades 132 is 23.2 mm to 25.2 mm. This range ensures that the stator blades 132 can extend outside the pressurizing seat 131 and that the stator blades 132 on the pressurizing member 13 can achieve a better air guide effect.

[0317] Please refer to Figures 7-10 to 7-12. Furthermore, the extension portion 1322 is arc-shaped, which can more effectively guide the airflow sent out by the blades 112 on the fan assembly 11, increasing the smoothness and stability of the airflow. The radial height h of the extension portion 1322 (as shown in Figure 7-11) increases in sequence along the direction in which the radial radius of the pressure seat 131 gradually decreases, and ensures that the static blade tips 1323 of the extension portion 1322 remain flush at all positions, thereby ensuring the stability of the static blade tips 1323 at all positions of the extension portion 1322 when connected to the inner surface of the second cover 122. When the connection portion 1321 is linear, the linear shape is perpendicular to the surface of the first cover 121 and the pressure seat 131, which can make the connection portion 1321 have better strength and rigidity, effectively resist the axial load of the supercharger 12, and improve the firmness and stability of the connection between the two. As a result, each stator blade 132 naturally transitions from an arc shape to a straight line, allowing the windflow to enter the extension portion 1322 and the connecting portion 1321 in a mixed direction, and then be combed to form a direct current that is blown out parallel to the axial direction of the pressure seat 131. This increases the blowing distance and reduces turbulence, noise, and vibration. It also reduces the noise emitted by turbulent crosstalk, achieving noise reduction and transforming sharp noise into a low sound. The curvature of the extension portion 1322 is opposite to that of the stator blade 132, which facilitates a natural arc-shaped transition between the fan blade 112 and the stator blade 132, making it easier for the windflow sent by the fan blade 112 to enter between the stator blades 132, where it is combed by the stator blades 132 to form a direct current and enter the outside world.

[0318] Please refer to Figure 7-5. Furthermore, the gap width G2 between the top end 1323 of the static blade of the extension portion 1322 and the inner surface of the supercharger 12 (G2 as shown in Figure 7-5) is smaller than the gap width G1 between the top end 1121 of the fan blade 112 and the inner surface of the supercharger 12. This can reduce the wind flow transmitted by the fan blade 112 passing through the gap between the fan blade 112 and the supercharger 12 and reduce the wind speed, thereby ensuring that most of the wind flow transmitted by the fan blade 112 can be transmitted and combed through the static blade 132 at a high wind speed.

[0319] Furthermore, from the end of the extension portion 1322 close to the fan blade 112 to the end of the extension portion 1322 away from the fan blade 112, the gap width between the top end 1323 of the static blade of the extension portion 1322 and the inner surface of the supercharger 12 is the same, avoiding the situation where the airflow is decelerated when passing through gaps of different widths.

[0320] Alternatively, when the vane tips 1323 of the extension 1322 are too close to the inner surface of the supercharger 12, the gap width G2 between them can be negligible. Alternatively, the vane tips 1323 of the extension 1322 may directly abut and contact the inner surface of the supercharger 12. In both cases, the gap width G2 is zero. The abutment of the extension 1322 thus improves the stability of the connection between the supercharger 12 and the pressurizing member 13, thereby enhancing the stability of the airflow between them.

[0321] Please refer to Figures 7-6, 7-7 and 7-10. Furthermore, the installation angles of the fan blades 112 include the installation angle β of the fan blade root end 1122 and the installation angle γ of the fan blade top end 1121, both of which are greater than the installation angle α of the static blades 132 (as shown in Figure 7-9 α), so that the curvature of the fan blades 112 is greater than the curvature of the static blades 132, which is conducive to the wind flow sent by the fan blades 112 being more smoothly introduced into the space between the static blades 132, so as to reduce the energy loss of the wind flow when turning, and make the wind flow smoother, so that the wind flow can maintain a higher speed after entering between the static blades 132, thereby forming a stronger wind pressure and enhancing the air supply effect. In addition, the smooth wind guidance of the wind flow at both times can effectively reduce noise. In addition, the smaller installation angle of the fan blades 112 can be conducive to achieving the transition between the curved extension 1322 and the straight connection, making the transition at the connection more natural.

[0322] Please refer to Figures 7-10. Furthermore, the installation angle α of the extension portion 1322 of the static blade 132 is 14-30°, which can achieve a natural transition from the arc-shaped extension portion 1322 to the straight-line connection portion 1321 on the static blade 132, avoiding the influence of the presence of folded angles on the wind flow, and achieving effective wind guidance of the wind flow sent out by the blades on the fan assembly 11. It can also achieve a natural transition of the wind flow from the arc-shaped extension portion 1322 to the straight-line connection portion 1321, making the wind guidance and combing of the static blade 132 more natural and smooth.

[0323] Referring to Figures 7-10 to 7-12 , pressurizing seat 131 further includes a front end 1311 and a rear end 1312, with front end 1311 and rear end 1312 corresponding to stationary blade root end 1324 of connecting portion 1321 and extension portion 1322, respectively. The radial radius of rear end 1312 gradually increases toward front end 1311, reaching the radial radius of front end 1311. The radial radius of front end 1311 is greater than the radial radius of rear end 1312. The surface of the front end 1311 can be parallel to the axis of the pressure piece 13, and the radial radius of the rear end 1312 gradually increases to the radial radius of the front end 1311. When the windflow is between the extension parts 1322, the windflow introduced by the extension part 1322 of the static blade 132 can be gradually pressurized, so that the pressurization process of the windflow by the pressure piece 13 is more balanced; and when the windflow of the static blade 132 enters between the connecting part 1321, when the windflow passes through the front end 1311, the front end 1311 of the pressure seat 131 cooperates with the connecting part 1321 to be parallel to the axial front end 1311, and the windflow can form a direct current wind that is blown out in parallel with the axial direction of the pressure piece 13. Therefore, the pressure piece 13 not only realizes the continuous pressurization of the windflow delivered by the fan assembly 11, but also guides the direction of the pressurized windflow. The boundary radial diameter K1 of the outer surface of the front end 1311 of the pressure seat 131 (as shown in K1 in Figure 7-11) is 36mm-40mm, and the boundary radial diameter K2 of the outer surface of the rear end 1312 of the pressure seat 131 (as shown in K2 in Figure 7-11) is 31mm-35mm, thereby defining the upper and lower limits of the pressurization of the pressure member 13, so that the airflow passing through the pressure seat 131 can be smoothly pressurized within a smaller range, thereby making the final wind speed and wind pressure of the delivered airflow more stable.

[0324] It should be noted that the portion where the first cover 121 connects to the stationary blades 132 corresponds to the front end 1311 of the pressurizing seat 131. The first cover 121 extends away from the rear end 1312 of the pressurizing seat 131, extending out of the pressurizing seat 131 and into the outside world, forming an air inlet 1231. The inner wall of the air inlet 1231 is in a smooth, arc-shaped shape. The extension direction of the first cover 121 is opposite to the extension direction of the extension portion 1322 of the stationary blades 132. The radial radius of the air inlet 1231 gradually increases along the extension direction of the first cover 121, forming a smooth, arc-shaped structure. This facilitates smoother air discharge from the air inlet 1231 and expands the air discharge range.

[0325] Referring to Figures 7-12, the distance E between the outer surface of the front end 1311 of the pressure seat 131 and the inner surface of the first cover 121 (as shown in Figures 7-12) is 5.8 mm to 7.8 mm. This limits the size of the air inlet 1231, through which the air is ultimately discharged. Within this range, the air inlet 1231 can effectively concentrate the airflow, increase the wind speed, and provide the user with a stronger sense of wind.

[0326] Please refer to Figures 7-13. The second embodiment of the application also provides a portable fan 3, including the fan blade assembly 1 described in any one of the first embodiments, and also including a motor 14 and a power supply unit 2. The motor 14 is arranged inside the fan blade assembly 1, and the power supply unit 2 is arranged outside the fan blade assembly 1. The power supply unit 2 and the motor 14 are electrically connected to drive the fan assembly 11 to rotate.

[0327] It can be understood that the portable fan 3 includes a fan blade assembly 1 and a power supply unit 2 connected to the fan blade assembly 1. The power supply unit 2 and the motor 14 are electrically connected to supply power to the motor 14, drive the fan assembly 11 to rotate, and blow out airflow. The power supply unit 2 can be a handheld assembly for the user to use by hand, or stand on a plane for use, and the fan blade assembly 1 is used to blow air to the user. In the present embodiment, the portable fan 3 is a handheld fan. Of course, in other embodiments, the portable fan 3 can be a small fan having only the above-mentioned fan blade assembly 1, or it can be a desktop fan, a clip fan, a versatile fan, etc. This embodiment is not limited to this, as long as the power supply unit 2 can supply power to the motor 14 inside the fan blade assembly 1. And because the portable fan 3 includes the fan blade assembly 1 described in any one of the first embodiments, it has the same technical effect as the fan blade assembly 1 in the first embodiment, and this embodiment does not limit this.

[0328] Referring to Figure 7-4 , a mounting groove 1114 is provided on the side of rotating base 111 near pressure member 13, and a mounting cavity 1313 is provided on the side of pressure member 13 near rotating base 111. Mounting groove 1114 and mounting cavity 1313 face each other and form a mounting space, in which motor 14 is housed. Fan assembly 11 is driven by motor 14 to rotate as a whole, thereby driving blades 112 to rotate.

[0329] It is understandable that the fan assembly 1 further includes a display assembly 18, which is disposed on a side of the pressurizing seat 131 facing away from the fan assembly 11. The display assembly 18 can be used to display at least one of the power level, the current gear position, and the charging status.

[0330] Plan 8

[0331] In one embodiment, as shown in Figures 8-1 and 8-2, schematic diagrams of a portable fan according to this embodiment are provided. The portable fan includes an air outlet 100 and a handheld portion 200. The handheld portion 200 is designed to be held by a user or used upright on a flat surface, while the air outlet 100 is designed to blow air toward the user. In this embodiment, the portable fan is a handheld fan. However, in other embodiments, the portable fan may be a small fan consisting solely of the air outlet 100, a desktop fan, a clip fan, a versatile fan, and the like, without limitation.

[0332] In one embodiment, as shown in Figures 8-1 to 8-3, the air outlet portion 100 includes an air outlet cover 1, an air inlet cover 2, a fan blade assembly and an outer cover 3. The air inlet cover 2 is connected to the air outlet cover 1, and the outer cover 3 is provided to connect the air outlet cover 1 and the air inlet cover 2. The fan blade assembly is installed on the rear side of the air outlet cover 1, and is at least partially provided on the inner side of the air inlet cover 2. The air outlet cover 1 is installed in the outer cover 3 from front to back, and a first stopper 11 is provided at the front end of the air outlet cover 1. The first stopper 11 limits the depth of the air outlet cover 1 entering the outer cover 3. The air inlet cover 2 is installed in the outer cover 3 from back to front and is connected to the air outlet cover 1. A second stopper 21 is provided at the rear end of the air inlet cover 2. The second stopper 21 limits the depth of the air inlet cover 2 entering the outer cover 3.

[0333] In one embodiment, as shown in Figures 8-2 to 8-5, the air outlet cover 1 includes an inner ring portion 12, an outer ring portion 13, and a plurality of connecting blades 14 connecting the inner ring portion 12 and the outer ring portion 13. The fan blade assembly and the inner ring portion 12 are a first group, the outer ring portion 13, the air inlet cover 2, and the outer cover 3 are a second group, and an air duct is formed between the first group, the second group, and the connecting blades 14. The fan blade assembly is installed on the rear side of the air outlet cover 1, so when the wind enters the air duct from the air inlet cover 2, the fan blade assembly is installed downwind, and the connection between the fan blade assembly and the air outlet cover 1 is more reliable and tight, and is less likely to become loose or make abnormal noises.

[0334] In one embodiment, as shown in Figures 8-3, 8-4, 8-6, 8-7, and 8-8, the handle 200 is provided with a fastening portion 71 corresponding to the air outlet 100. The outer cover 3 is provided with a notch 31 corresponding to the handle 200. The air outlet cover 1 has a first engaging groove 15 that exposes the notch 31, and the air inlet cover 2 has a second engaging groove 243 that exposes the notch 31. When the air outlet cover 1 and the air inlet cover 2 are connected, the first engaging groove 15 and the second engaging groove 243 are connected. A portion of the fastening portion 71 is inserted upward through the notch 31 into the first engaging groove 15, and another portion of the fastening portion 71 is inserted upward through the notch 31 into the second engaging groove 243.

[0335] In one embodiment, as shown in Figures 8-2, 8-3, 8-4, 8-6 and 8-8, the fastening portion 71 includes a first fixing portion 711 and a second fixing portion 712. The plurality of connecting leaves 14 include a lower connecting leaf 141, which extends downward from the inner ring portion 12 to connect to the outer ring portion 13. The lower connecting leaf 141 has a width in the left-right direction, and the lower connecting leaf 141 extends vertically to form a wire groove 142. The wire groove 142 has an overlapping portion with the first embedding groove 15, and the first fixing portion 711 passes upward through the notch 31 and is inserted into the overlapping portion of the wire groove 142 with the first embedding groove 15. A fixing member 8 fixes the first fixing portion 711 and the lower connecting leaf 141.

[0336] In one embodiment, as shown in Figures 8-2, 8-3, 8-4, 8-5, and 8-7, the air inlet cover 2 includes a first guide member 22, a second guide member 23, and a third guide member 24. The first guide member 22 includes a first guide portion 221 that radially decreases from back to front. The second guide member 23 includes a second guide portion 231 that radially decreases from back to front. The third guide member 24 includes a third guide portion 241 that radially decreases, remains radially constant, and then increases radially from back to front. The first guide portion 221, the second guide portion 231, and the third guide portion 241 are arranged adjacent to each other from back to front. Wind flows through the first guide portion 221, the second guide portion 231, and the third guide portion 241 in sequence, increasing wind pressure and wind efficiency. The second embedded groove 243 is provided on the third guide member 24. The second fixing portion 712 is inserted into the second embedded groove 243 upward through the notch 31. Another fixing member 8 secures the second fixing portion 712 and the third guide member 24.

[0337] In one embodiment, as shown in Figures 8-2, 8-3, 8-4, 8-5, and 8-7, the second guide member 23 is connected to the radially inner side of the first guide member 22, and the second guide portion 231 is connected to the third guide portion 241. The first guide member 22 protrudes forward to form a buckle 222, and the outer side of the third guide member 24 is provided with a buckle 242. The buckle 222 engages with the buckle 242 forward to secure the first guide member 22 and the second guide member 23 to the rear of the third guide member 24. The buckle 222 engages with the buckle 242 forward after the fixing member 8 secures the second fixing portion 712 and the third guide member 24. The first guide member 22 also has a reinforcement member 223 protruding forward. The reinforcement member 223 passes through the second fixing portion 712 and the third guide member 24 to further secure the handheld portion 200 to the third guide member 24. In the case where no or only a few fixing parts 8 are needed, the air outlet cover 1, the air inlet cover 2, the outer cover 3 and the handheld part 200 can also be well fastened to each other, which is convenient for disassembly, repair and replacement of each component.

[0338] In one embodiment, as shown in Figures 8-2, 8-4, 8-9, 8-10, and 8-11, the fan assembly includes a fixed frame 4, an impeller 5, and a motor 6. The fixed frame 4 includes a first base plate 41 and a hollow shaft 42 extending axially from the first base plate 41. The impeller 5 includes a hub 51, a plurality of blades 52 spaced around the outside of the hub 51, and a rotating shaft 53 integrally formed inside the hub 51. The hub 51 is open forward, and the motor 6 is disposed within the hub 51 and outside the rotating shaft 53. Specifically, the motor 6 includes a stator assembly 61 and a rotor assembly 62, which are disposed inside the hub 51 and outside the rotating shaft 53. A portion of the rotating shaft 53 is fixed to the inside of the hub 51, with the front end of the rotating shaft 53 extending forward beyond the front end of the hub 51 and extending forward into the shaft 42. The first base plate 41 is used to fix the motor 6 and the impeller 5 to other components. By first fixing the fixing frame 4, the motor 6 and the impeller 5 together to form the fan assembly, a modular structure is formed, and then the first base plate 41 of the fixing frame 4 is fixed to other components, thereby facilitating installation, fixing, and disassembly and maintenance.

[0339] In one embodiment, as shown in Figures 8-10 and 8-11, the rotor assembly 62 includes a housing 621, a magnetic ring 622 disposed inside the housing 621, and a bearing 623 disposed within the shaft barrel 42. The stator assembly 61 is disposed inside the magnetic ring 622 and outside the shaft barrel 42. A first step 421 is provided on the outside of the shaft barrel 42, with the stator assembly 61 abutting forward against the first step 421. A second step 422 is provided rearwardly on the inside of the shaft barrel 42, and a third step 423 is provided forwardly on the inside of the shaft barrel 42. Two bearings 623 are provided: one abuts forward against the second step 422, and the other abuts rearward against the third step 423. A stopper is provided at the front end of the rotating shaft 53 to ensure stable and long-term rotation of the rotating shaft 53 within the shaft barrel 42. By providing the first step portion 421 , the second step portion 422 and the third step portion 423 , the stator assembly 61 and the rotor assembly 62 are stably fixed to the shaft cylinder 42 , thereby enhancing the stable connection between the motor 6 and the fixing bracket 4 .

[0340] In one embodiment, as shown in Figures 8-9 to 8-11, the hub 51 includes a seat 511 that radially increases from rear to front, a first extension 512 that protrudes forward from the inner side of the seat 511, and a second extension 513 that protrudes inward from the inner side of the seat 511. The first extension 512 and the second extension 513 form a right-angled stop structure. The front end of the first extension 512 extends forward beyond the front end of the seat 511, and the front end of the rotating shaft 53 extends forward beyond the front end of the first extension 512. The motor 6 is disposed outside the rotating shaft 53, enters the impeller 5 along the first extension 512, and is secured to the second extension 513. Specifically, the stator assembly 61 and the rotor assembly 62 are arranged on the radial inner side of the first extension portion 512, and the side wall and rear wall of the casing 621 surround the radial outer side and rear side of the magnetic ring 622. The side wall of the casing 621 is correspondingly arranged on the radial inner side of the first extension portion 512, and the rear wall of the casing 621 is correspondingly arranged on the front side of the second extension portion 513.

[0341] In one embodiment, as shown in Figures 8-11 and 8-12, the hub 51 further includes a sleeve 514 protruding from the center of the inner side of the base 511. The rotating shaft 53 is integrally formed with the sleeve 514. A gap is provided between the sleeve 514 and the rear bearing 623. An elastic member 63 is provided between the sleeve 514 and the rear bearing 623 to prevent the sleeve 514 from striking the rear bearing 623 when the portable fan is subjected to external impact or vibration, thereby buffering vibrations generated by the rotation of the hub 51. A plurality of ribs 515 extend outward from the sleeve 514 to the base 511. These ribs 515 reinforce the hub 51 and buffer vibrations generated by its rotation. The front ends of the ribs 515 do not extend beyond the front ends of the second extensions 513, so that the ribs 515 do not interfere with the rotor assembly 62 and the stator assembly 61.

[0342] In one embodiment, as shown in Figures 8-2, 8-3, 8-4 and 8-9, a second substrate 121 is provided in the inner ring portion 12. As mentioned above, the first substrate 41 is used to fix the motor 6 and the impeller 5 to other components. In this embodiment, the first substrate 41 and the second substrate 121 are fixedly connected to fix the fan blade assembly to the air outlet cover 1. By fixing the first substrate 41 and the second substrate 121, the fan blade assembly can be easily combined with or separated from the air outlet cover 1, thereby greatly improving the convenience of disassembly and assembly between the fan assembly and the air outlet cover 1, and shortening the disassembly and assembly time between the fan assembly and the air outlet cover 1. In this embodiment, the first substrate 41 and the second substrate 42 are fixedly connected by the fixing member 8. Of course, in other embodiments, the first substrate 41 and the second substrate 42 can be connected by other means.

[0343] In one embodiment, as shown in Figures 8-2 to 8-3 and Figures 8-9 to 8-11, the shaft cylinder 42 includes a protrusion 424 extending axially forward from the first substrate 41, and a positioning hole 122 is formed through the second substrate 121, and the protrusion 424 is fixed forward to the positioning hole 122. The inner ring portion 12 is formed with a first receiving portion 123 on the rear side of the second substrate 121, and at least a portion of the fan blade assembly is received in the first receiving portion 123. The first extension portion 512 and the inner ring portion 12 at least partially overlap in the radial direction, which can reduce the ingress of dust and impurities into the inner side of the hub 51 and effectively reduce the noise when the motor 6 is driven.

[0344] In one embodiment, as shown in FIG8-5 , the outer wall of the inner ring portion 12 radially increases from rear to front, and the hub 51 includes a seat body 511 that radially increases from rear to front. The outer diameter of the seat body 511 differs from the outer diameter of the inner ring portion 12 by less than 1 mm. When the first substrate 41 is fixed to the second substrate 121, the spacing between the seat body 511 and the inner ring portion 12 is 1.69-1.89 mm. Wind flows smoothly from the outside of the seat body 511 to the outside of the inner ring portion 12, and the continuously radially increasing path facilitates increased wind pressure, expanding the air outlet range and distance.

[0345] In one embodiment, as shown in Figures 8-2, 8-4, and 8-5, the inner ring portion 12 has a second receiving portion 124 formed on the front side of the second substrate 121. The first circuit board 91 is housed within the second receiving portion 124. A first through-hole 411 is formed through the first substrate 41, and a second through-hole 125 is formed through the second substrate 121. The first through-hole 411 and the second through-hole 125 are at least partially aligned. The stator assembly 61 includes a coil, the leads of which pass through the first through-hole 411 and the second through-hole 125 and are electrically connected to the first circuit board 91. A display panel 92 is fixed to the front end of the first circuit board 91. The display panel 92 is used to display at least one of the battery level, the current gear position, and the charging status. The portable fan also includes a front cover 16 disposed on the front end of the inner ring portion 12. The front cover 16 protects the first circuit board 91 and the display panel 92. The front cover 16 is transparent or translucent to allow the contents of the display panel 92 to be visible.

[0346] In one embodiment, as shown in Figures 8-3 and 8-4, the handheld portion 200 is provided with a power supply 95, a control center 94, and a second circuit board 93. The first circuit board 91 is electrically connected to the control center 94, and the wires connecting the first circuit board 91 and the control center 94 pass through the wire groove 142 formed by the lower connecting leaf 141. The second circuit board 93 is electrically connected to the control center 94, and the power supply 95 is also electrically connected to the control center 94. The power supply 95 can supply power to any one, two, or all three of the fan blade assembly, the display panel 92, and the switch 96, allowing the portable fan to operate normally. The portable fan also includes a switch 96 provided on the handheld part 200 and electrically connected to the first circuit board 91, and the switch 96 is used to adjust the wind speed gear; the portable fan also includes a charging component 97 provided on the handheld part 200 and electrically connected to the control center 94. When the charging component 97 is connected to an external power supply, the charging component 97 can charge the power supply 95, and the charging component 97 can also directly provide power to drive the motor 6 to rotate.

[0347] In one embodiment, as shown in Figures 8-3, 8-4, and 8-8, a bracket 72 is provided within the handheld portion 200. The bracket 72 is used to position and secure the second circuit board 93 and the control center 94. The bracket 72, the second circuit board 93, and the control center 94 are located above the power supply 95. The bracket 72 has an upwardly protruding third fixing portion 721. The third fixing portion 721 at least partially overlaps with the first fixing portion 711. The third fixing portion 721 passes upward through the notch 31 and is inserted into the wire groove 142. The third fixing portion 721 secures the wires connecting the first circuit board 91 and the control center 94. The fixing member 8 secures the first fixing portion 711, the third fixing portion 721, and the lower connecting leaf 141.

[0348] In one embodiment, as shown in Figures 8-3 to 8-5 , the distance between the rear end of the hub 51 and the rear end of the air inlet hood 2 is 17.29-17.49 mm. This distance between the rear end of the hub 51 and the rear end of the air inlet hood 2 ensures sufficient air intake space while also pressurizing and converging the air within this space, enhancing wind force and efficiency.

[0349] In one embodiment, as shown in Figures 8-3 to 8-5, the second guide member 23 also includes a centrally located wind guide column 232 and a plurality of grating blades 233 connecting the wind guide column 232 and the second air guide portion 231 and arranged in a spaced-apart manner. The wind is combed by the grating blades 233 and enters the air outlet 100, where the wind guide column 232 and the second air guide portion 231 focus and increase pressure. The radially constant portion of the third air guide portion 241 is located behind the hub 51. Wind passes through the first air guide portion 221, the second air guide portion 231, and the radially decreasing, radially constant portion of the third air guide portion 241 from back to front, continuously pressurizing and converging the wind, enhancing wind pressure and efficiency. As the wind passes through the radially increasing seat 511 from back to front, the radially increasing portion of the third air guide portion 241 expands radially in the same direction as the seat 511, further expanding and transporting the pressurized and focused wind forward and outward, further enhancing wind pressure and efficiency and increasing the air outlet range.

[0350] In one embodiment, as shown in Figures 8-9 and 8-12, the impeller 5 includes a plurality of connecting ribs 54, which are arranged at intervals and around the base 511 and the first extension 512. The impeller 5 also includes a balance compensation structure, which is arranged on the connecting ribs 54, so that the impeller 5 has better dynamic balance. Furthermore, a plurality of connecting ribs 54 are provided to connect the base 511 and the first extension 512, thereby enhancing the structural strength between the base 511 and the first extension 512 and dispersing the vibration generated by the rotation of the impeller 5. The connecting ribs 54 include a first surface connected to the base 511, a second surface connected to the first extension 512, and a third surface radially connecting the first surface and the second surface. The first surface, the second surface, and the third surface are interconnected, further enhancing the structural strength between the first extension 512 and the base 511.

[0351] In one embodiment, as shown in Figures 8-9, 8-11, and 8-12, the third surface is flush with the end of the seat body 511, and the balancing compensation structure is provided on the third surface to facilitate detection and adjustment of the balance of the impeller 5. The radial length of the third surface is 2.47-2.67 mm, and the width of the third surface is 0.60-0.80 mm, which can effectively provide the balancing compensation structure.

[0352] In one embodiment, the balance compensation structure is made of plastic or a plastic-metal hybrid, and is molded and attached to the connecting rib 54. In other embodiments, the balance compensation structure may also be made of metal, and is mechanically fixed to the connecting rib 54.

[0353] In one embodiment, as shown in Figures 8-12, the number of the connecting ribs 54 is 25. A large number of the connecting ribs 54 can be used to set the balance compensation structure, which can better set the dynamic balance of the impeller 5. The number of the blades 52 is 5, and the number of the blades 52 is an odd number, which is more conducive to setting the dynamic balance of the impeller 5. This is because when the blades 52 of the impeller 5 are an even number, a symmetrical arrangement is formed, which not only makes it difficult to adjust the balance of the impeller 5 itself, but also easily causes the impeller 5 to generate more resonance when running at high speed, thereby causing the impeller 5 to suffer fatigue caused by the resonance, and eventually the blades 52 may break. Of course, the number of the connecting ribs 54 and the blades 52 is not limited to this.

[0354] In one embodiment, as shown in FIG8-9 and FIG8-12 , the connecting ribs 54 extend radially in a straight line, and the blades 52 extend radially in a curved manner.

[0355] The above is only a preferred embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A portable fan comprising a fan assembly, wherein: The fan assembly delivers air axially from back to front, and the fan assembly includes: The rotating seat has a radially enlarged portion from the back to the front; A plurality of fan blades are spaced apart on the surface of the rotating seat and spirally extend from back to front; The surface of the rotating seat is radially protruding and is an arc surface from back to front.

2. The portable fan according to claim 1, wherein The rotating seat includes a rear air guide portion, a fan blade connecting portion and a front air guide portion arranged in sequence along the axial direction from rear to front. The radial radius of the rotating seat gradually increases from the rear end of the rear air guide portion to the front end of the fan blade connecting portion, and the radial radius of the front air guide portion remains unchanged from the rear end to the front end; A plurality of fan blades are spaced apart and distributed on the fan blade connection portion, and spirally extend from the back to the front on the fan blade connection portion; The axial length of the fan blade connecting portion is greater than the axial length of the front air guide portion, and the axial length of the front air guide portion is greater than the axial length of the rear air guide portion.

3. The portable fan according to claim 2, wherein: The fan blades include a rear end and a front end. The radial radius of the rotating seat at the position corresponding to the front end of the fan blade is 14.45-18.45 mm, the radial radius of the rotating seat at the position corresponding to the rear end of the fan blade is 8-12 mm, and the radial radius of the rear end of the rear air guide part is 2.62-6.62 mm.

4. The portable fan according to claim 1, wherein The fan blade comprises a fan blade root end connected to the fan blade connection portion and a fan blade top end away from the fan blade connection portion; The installation angle of the root end of the fan blade is 32-37 degrees, and the installation angle of the top end of the fan blade is 47-53 degrees.

5. The portable fan according to claim 1, wherein The axial length of the fan blade is 1 / 2 to 3 / 4 of the axial length of the rotating seat; The axial length of the rotating seat is 21-25 mm; the axial length of the fan blade is 12-16 mm.

6. The portable fan according to claim 1, wherein An installation groove is provided on the inner side of the rotating seat, the groove wall of the installation groove and the rotating seat form a double-layer structure, and the installation groove is used to install the motor.

7. The portable fan according to claim 1, wherein Among any two adjacent fan blades, the leading end of one of the fan blades is correspondingly mapped between the trailing end and the leading end of the other fan blade along the axial direction of the rotating seat.

8. The portable fan according to any one of claims 1 to 7, wherein: The fan assembly and the pressure member are sequentially arranged along the axial direction. The pressure member comprises a pressure seat and a plurality of stationary blades, and the plurality of stationary blades are arranged on the pressure seat at intervals.

9. The portable fan according to claim 1, wherein The motor comprises a stator assembly and a rotor assembly arranged coaxially, wherein the rotor assembly is rotatable relative to the stator assembly. The stator assembly includes a stator core and windings. The stator core ring is provided with a plurality of winding parts. The windings are wound on the winding parts. The winding parts include a plurality of stacked magnetic conductive parts. The rotor assembly includes a magnet arranged around the stator assembly. The axial length of the magnet is greater than the total thickness of the multiple stacked magnetic conductive parts.

10. The portable fan according to claim 9, wherein The magnetic conductive member is a silicon steel sheet, and the axial length of the magnet is between 11 mm and 13 mm; The total thickness of the multiple stacked silicon steel sheets is between 7.5 mm and 9.5 mm.

11. The portable fan according to claim 9, wherein The magnetization of the magnet is between 1100 Gauss and 1300 Gauss; The outer diameter of the magnet is between 25.2 mm and 27.2 mm; The inner diameter of the magnet is between 21.8 mm and 23.8 mm.

12. The portable fan according to claim 9, wherein The diameter of the stator assembly is between 21 mm and 23 mm. The distance between the two opposing winding parts is between 12 mm and 14 mm; The diameter of the winding wire is between 0.45 mm and 0.47 mm; The number of the winding parts is 6, 8 or 9.

13. The portable fan according to claim 9, wherein Also includes a swivel seat; The motor further includes a boss, A first through hole is formed in the center of the stator core, and the boss passes through the first through hole and is fixedly connected to the stator core. The boss is provided with a second through hole, and the rotor assembly further comprises a rotating shaft and two bearings, wherein the two bearings are respectively provided at both ends of the second through hole. The rotating shaft passes through the two bearings and one end extends out of the boss. The rotating seat is fixedly connected to the end of the rotating shaft extending out of the boss. The rotating seat is fixedly connected to the magnet.

14. The portable fan according to claim 13, wherein The diameter of the first through hole is between 10 mm and 12 mm; The diameter of the second through hole is between 8.6 mm and 10.6 mm; The rotating seat is provided with a mounting groove on one side close to the boss. The boss extends into the mounting slot, and the stator assembly and the magnet are located in the mounting slot. The magnet is fixedly connected to the inner side wall of the installation groove, and one end of the rotating shaft extending out of the boss is fixedly connected to the inner bottom wall of the installation groove.

15. The portable fan according to claim 14, wherein The depth of the mounting groove is greater than or equal to the axial length of the magnet, and a gap is left between the magnetic conductive member and the notch and inner bottom wall of the mounting groove; The mounting groove further includes a connecting portion, the connecting portion protruding toward the boss. The connecting portion is provided with a connecting cavity corresponding to the rotating shaft, and one end of the rotating shaft extending out of the boss is plugged into the connecting cavity; An elastic member is sleeved on the rotating shaft, one end of the elastic member abuts against the installation groove, and the other end abuts against the bearing facing the installation groove.

16. The portable fan according to any one of claims 11 to 15, wherein: It comprises a main body and the motor, wherein a cavity is provided in the main body and the motor is arranged in the cavity; It also includes a rotating base, which is a diagonal flow fan, an axial flow fan or a centrifugal fan.

17. The portable fan according to claim 1, wherein comprising a housing, the fan assembly, a pressurizing member and a supercharger, The housing includes an internal through hole and includes an air inlet end and an air outlet end; The fan assembly includes a rotating seat and a plurality of fan blades; The pressure member and the fan assembly are sequentially arranged along the axial direction and correspond to the air outlet and the air inlet, respectively. The pressure member includes a pressure seat and a plurality of stationary blades. The supercharger is arranged inside the housing, and the interior thereof passes through and surrounds the radial periphery of the fan assembly and the pressurizing member; The stationary blades radially extend to connect the pressurizing seat and the supercharger, and the stationary blades axially extend beyond the pressurizing seat.

18. The portable fan according to claim 17, wherein The rotating seat includes a rear air guide portion, a blade connecting portion and a front air guide portion which are sequentially arranged along the axial direction. The radial radius of the rotating seat gradually increases from the rear air guide portion to the fan blade connection portion; The stationary blades axially extend between the front air guide portion and the inner surface of the supercharger.

19. The portable fan according to claim 18, wherein The supercharger includes a first cover, a second cover and a third cover which are connected in sequence in the axial direction. The first cover surrounds the outside of the pressurizing seat, and a plurality of stationary blades are arranged outside the pressurizing seat at intervals and connected to the first cover.

20. The portable fan according to claim 19, wherein The stationary blade includes a connecting portion and an extending portion. The connecting portion is located between the pressurizing seat and the first cover, and respectively connects the pressurizing seat and the first cover; The extension portion includes a portion located between the pressurizing seat and the second cover, and a portion located between the front air guide portion and the second cover. The extension portion extends axially from the connecting portion toward the fan blade, and axially extends to between the front air guide portion and the inner surface of the supercharger.

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