Fan blade assembly and portable fan

Abstract

The invention relates to the technical field of fans, in particular to a fan blade assembly and a portable fan, and the fan blade assembly provided by the invention comprises a shell which is internally through and comprises an air inlet end and an air outlet end; the pressurizing piece comprises a pressurizing seat and a plurality of stationary blades; the fan assembly and the pressurizing piece are sequentially arranged in the axial direction, and the fan assembly comprises a rotating base and a plurality of fan blades; the pressurizer is arranged in the shell, and the interior of the pressurizer is through and surrounds the radial peripheries of the fan assembly and the pressurizing piece; and in the axial direction from the air inlet end to the air outlet end, an air flow channel is formed among the inner surface of the supercharger, the outer surface of the rotating seat and the outer surface of the pressurizing seat, and the sectional area of the air flow channel is gradually reduced. The air flow is gradually pressurized and accelerated in the air flow channel in the air flow direction, so that the air pressure and the air speed are uniformly improved, and the air pressure and the air speed of the air flow finally blown out of the fan blade assembly can be more stable.

Description

[Technical field]

[0001] The present invention relates to the technical field of fans, and in particular to a fan blade assembly and a portable fan. [Background technology]

[0002] With the advancement of fan technology and the improvement of people's awareness of quality of life, people have higher and higher requirements for portable fans, and various portable fans have appeared on the market, such as handheld fans, wearable fans, bladeless fans, etc. In particular, some existing portable fans can achieve the effect of turbine wind gathering and provide stronger wind force.

[0003] However, the wind pressure and wind speed of the wind finally delivered by this type of portable fan are unstable, which affects the user's experience. [Summary of the invention]

[0004] In order to solve the problem that the wind pressure and wind speed delivered by some existing portable fans are unstable, thus affecting the user's experience, the present invention provides a fan blade assembly and a portable fan.

[0005] The solution to the technical problem of the present invention is to provide a fan blade assembly, comprising:

[0006] The shell is connected internally and includes an air inlet and an air outlet;

[0007] A pressurized component, including a pressurized seat and a plurality of stationary blades;

[0008] A fan assembly is arranged in sequence with the pressure member along the axial direction, and the fan assembly includes a rotating seat and a plurality of fan blades;

[0009] A supercharger is disposed inside the housing and penetrates through the inside of the housing and surrounds the radial periphery of the fan assembly and the pressurizing member;

[0010] Among them, in the axial direction from the air inlet end to the air outlet end, an air flow channel is formed between the inner surface of the supercharger, the outer surface of the rotating seat and the outer surface of the pressurizing seat, and the cross-sectional area of ​​the air flow channel gradually decreases.

[0011] Preferably, the axial length of the supercharger is greater than the sum of the axial lengths of the fan assembly and the pressure member; and the radial radius of a portion of the supercharger gradually increases along the flow direction of the wind.

[0012] Preferably, the supercharger comprises a first cover, a second cover and a third cover which are axially connected in sequence, 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;

[0013] The inner surfaces of the first cover, the second cover and the third cover smoothly transition to form a first airflow channel surface; the outer surface of the pressurizing seat and the outer surface of the rotating seat smoothly transition to form a second airflow channel surface, and the airflow channel is formed between the first airflow channel surface and the second airflow channel surface.

[0014] Preferably, from the air inlet end to the air outlet end, the rotating seat includes a rear air guide portion, a blade connecting portion and a front air guide portion which are arranged in sequence along the axial direction, and a plurality of blades are distributed on the blade connecting portion at intervals; from the rear end of the rear air guide portion to the front end of the blade connecting portion, the radial radius of the rotating seat gradually increases.

[0015] Preferably, the outer diameter of the front air guide portion at one end close to the pressurizing seat differs from the outer diameter of the pressurizing seat at one end close to the rotating seat by less than 2 mm.

[0016] Preferably, a rear cover is provided on the air inlet end, a protrusion is provided on the side of the rear cover facing the inside of the shell, and the outer diameter of the protrusion is larger than the outer diameter of the rear end of the rear air guide part and smaller than the outer diameter of the front end of the rear air guide part.

[0017] Preferably, the stationary blades axially extend out of the pressure seat and extend to between the front wind guide portion and the first wind flow channel surface.

[0018] Preferably, a supercharger zone is formed inside the supercharger; the supercharger zone includes a region from the rear end of the rear air guide portion to the front end of the pressurizing seat, and the axial length of the supercharger zone is 42.6-50.6 mm.

[0019] Preferably, the axial length of the supercharger is 50.5-58.5 mm.

[0020] In order to solve the above-mentioned technical problems, the present invention also provides a portable fan, comprising a fan blade assembly as described in any one of the above items, and also comprising a motor and a power supply unit, wherein the motor is arranged inside the fan blade assembly, and the power supply unit is arranged outside the fan blade assembly, and the power supply unit and the motor are electrically connected to drive the fan assembly to rotate.

[0021] Compared with the prior art, the fan blade assembly and the portable fan provided by the present invention have the following advantages:

[0022] An embodiment of the present invention provides a fan blade assembly, which is arranged such that the cross-sectional area of ​​the wind flow channel formed between the inner surface of the supercharger, the outer surface of the rotating seat and the outer surface of the pressurizing seat in the axial direction from the air inlet end to the air outlet end gradually decreases, so that the cross-sectional area of ​​the wind flow channel formed between the inner surface of the supercharger and the rotating seat is larger than the cross-sectional area of ​​the wind flow channel formed between the inner surface of the supercharger and the pressurizing seat, thereby achieving the cross-sectional area of ​​the wind flow channel formed inside the fan blade assembly gradually decreasing along the wind flow direction, thereby achieving the gradual pressurization and acceleration of the wind flow in the wind flow channel along the wind flow direction, making the pressurization and acceleration of the wind flow in the fan blade assembly more balanced, thereby evenly increasing the wind pressure and wind speed, and making the wind pressure and wind speed of the wind flow finally blown out of the fan blade assembly more stable.

[0023] The present invention also provides a portable fan having the same beneficial effects as the above-mentioned fan blade assembly, which will not be described in detail here.

Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

[0026] Figure 2 It is a schematic cross-sectional view of the fan blade assembly provided in the first embodiment of the invention.

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

[0028] Figure 4 It is a schematic cross-sectional view of a partial structure of the fan blade assembly provided in the first embodiment of the invention.

[0029] Figure 5 yes Figure 4 A is an enlarged view of the middle image.

[0030] Figure 6 The structure of the fan assembly of the fan blade assembly provided by the first embodiment of the invention is schematically shown. Figure 1 .

[0031] Figure 7 The structure of the fan assembly of the fan blade assembly provided by the first embodiment of the invention is schematically shown. Figure 2 .

[0032] Figure 8It is a schematic cross-sectional view of a fan assembly of a fan blade assembly provided in the first embodiment of the invention.

[0033] Fig. 9 It is a rear view of the fan assembly of the fan blade assembly provided in the first embodiment of the present invention.

[0034] Fig.10 It is a schematic structural diagram of the pressure member of the fan blade assembly provided in the first embodiment of the invention.

[0035] Fig.11 The first embodiment of the invention provides a schematic cross-sectional view of the pressure member of the fan assembly. Figure 1 .

[0036] Fig.12 The first embodiment of the invention provides a cross-sectional view of the pressure member of the fan assembly. Figure 2 .

[0037] Fig.13 It is a schematic diagram of the three-dimensional structure of a portable fan provided by the second embodiment of the invention.

[0038] Description of the accompanying drawings:

[0039] 1. Fan blade assembly; 2. Power supply unit; 3. Portable fan;

[0040] 11. Fan assembly; 12. Supercharger; 13. Pressure member; 14. Motor; 15. Housing; 16. First air flow channel surface; 17. Back cover; 18. Display assembly; 19. Second air flow channel surface; 161. Air flow channel;

[0041] 111, rotating seat; 112, fan blade; 121, first cover; 122, second cover; 123, third cover; 131, pressurizing seat; 132, stationary blade; 151, air inlet end; 152, air outlet end; 171, protrusion;

[0042] 1111, rear air guide portion; 1112, fan blade connection portion; 1113, front air guide portion; 1114, mounting groove; 1121, top end of fan blade; 1122, root end of fan blade; 1123, head end of fan blade; 1124, tail end of fan blade; 1211, air outlet; 1221, reinforcing rib; 1231, air inlet; 1311, front end; 1312, rear end; 1313, mounting cavity; 1321, connection portion; 1322, extension portion; 1323, top end of stationary blade; 1324, root end of stationary blade; 1325, head end of stationary blade; 1326, tail end of stationary blade. [Specific implementation method]

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0045] See also Figure 1-Figure 3 The first embodiment of the present invention provides a fan blade assembly 1, comprising: a shell 15, which is internally connected and includes an air inlet end 151 and an air outlet end 152; a pressure member 13, which includes a pressure seat 131 and a plurality of stationary blades 132; a fan assembly 11, which is axially arranged in sequence 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 air flow 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 air flow channel 161 gradually decreases.

[0046] Specifically, the shell 15 is a hollow through structure, the air inlet end 151 is a port for the outside airflow to enter the shell 15, and the air outlet end 152 is a port for the airflow entering 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, which is not limited in this embodiment. The wind direction f (such as Figure 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 from 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 (such as Figure 2As shown in C), that is, the fan assembly 11 and the pressure member 13 are sequentially arranged along the wind flow 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 static 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 wind flow 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 at the current position to achieve wind guidance between the fan assembly 11, and to achieve pressurization and speed-up of the wind flow sent out by the fan assembly 11. The static blades 132 on the pressure seat 131 will also be fixed at the current position and remain motionless to achieve wind guidance and combing of the wind flow sent out by the blades 112.

[0047] More specifically, the outer surface of the supercharger 12 is connected to the inner surface of the shell 15, so that the shell 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 wind flow are increased inside the supercharger 12. The supercharger 12 is a structure that is independent of the shell 15 and is used to pressurize the wind flow, so that in this embodiment, the supercharger 12 is used to cooperate with the pressure seat 131 and the rotating seat 111 in sequence to achieve the gradual pressure and speed of the wind flow sent out, thereby increasing the wind pressure and wind speed of the wind flow finally delivered. Instead of the shell 15 and the pressure seat 131 and the rotating seat 111 in sequence to achieve the gradual pressure of the wind flow. In addition, the setting of the supercharger 12 makes the supercharger 12 and the shell 15 form a double-layer structure, which is more conducive to reducing noise and facilitating the acquisition of a portable fan 3 with high wind pressure and low noise.

[0048] 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 wind flow 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 wind flow channel 161 formed between the inner surface of the supercharger 12 and the rotating seat 111 is larger than the width of the wind flow channel 161 formed between the inner surface of the supercharger 12 and the pressurizing seat 131 , thereby making the cross-sectional area of ​​the wind flow channel 161 formed between the inner surface of the supercharger 12 and the rotating seat 111 larger than the cross-sectional area of ​​the wind flow channel 161 formed between the inner surface of the supercharger 12 and the pressurizing seat 131, so that the cross-sectional area of ​​the wind flow channel formed inside the fan blade assembly 1 is reduced successively along the wind flow direction, thereby realizing the gradual pressurization and acceleration of the wind flow in the wind flow channel along the wind flow direction, making the pressurization and acceleration of the wind flow 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 wind flow finally blown out of the fan blade assembly 1 can be more stable.

[0049] See also Figure 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.

[0050] See also Figure 2 Furthermore, the axial length S1 of the supercharger 12 (eg Figure 2 S1), which is greater than the sum of the axial lengths of the fan assembly 11 and the pressure member 13 S2 (as shown Figure 2 As shown in S2); the radial radius of the supercharger 12 gradually increases along the wind flow direction.

[0051] 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 wind flow 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 wind flow direction, the increasing direction of the radial radius of the supercharger 12 is consistent with the decreasing direction of the radial radius of the pressurizing seat 131 and the rotating seat 111; and the increasing amplitude of the radial radius of the supercharger 12 is less than the increasing amplitude of the radial radius of the rotating seat 111 and the pressurizing seat 131, so as to avoid the situation where the width and cross-sectional area of ​​the wind flow channel 161 are gradually reduced along the axial direction due to the increase of the radial radius of the supercharger 12, thereby ensuring that the inner surface of the supercharger 12 can adapt to the shape of the surface of the pressurizing seat 131 and the rotating seat 111, so that the width and cross-sectional area of ​​the entire wind flow channel 161 can be reduced more smoothly, so that the process of pressurizing the wind flow is more stable, ensuring the stability of the wind flow during the supercharging and speeding process, reducing the fluctuation and eddy current phenomenon of the wind flow, and improving the stability of the overall wind flow. In addition, the supercharger 12 can also form a double-layer structure with the shell 15, further protecting the fan assembly 11 and the pressurizing member 13 and reducing noise.

[0052] See also Figure 2 Furthermore, the axial length S1 of the supercharger 12 is 50.5-58.5 mm. By setting the overall length of the supercharger 12, the supercharger 12 is ensured to have a range of supercharging and speeding up the wind flow, so that the wind flow inside the supercharger 12 is fully supercharged and accelerated, and a stronger and more stable wind flow is output. In addition, the setting of the axial length S1 minimizes the volume occupied by the entire fan blade assembly 1, which is conducive to the miniaturization of the entire fan blade assembly 1.

[0053] See also Figure 2Furthermore, 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 arranged at intervals 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.

[0054] 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, the third cover 123 corresponds to the air inlet end 151 connected to the shell 15, and 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 against the inner surface of the shell 15. After a plurality of stationary blades 132 are arranged at intervals outside the pressurizing seat 131 and connected to the first cover 121, a plurality of air outlets are formed between any two adjacent stationary blades 132, the first cover 121 and the pressurizing seat 131, so that the wind flow after being pressurized and accelerated by the supercharger 12 and the pressurizing member 13 can enter the outside. The first cover 121 is connected to the air outlet end 152 of the housing 15, and is not only connected to the housing 15 but also connected to the pressure member 13, so that the wind can pass through and enter the outside more smoothly. That is, the setting of the first cover 121 can realize the connection with other components of the fan blade assembly 1, and can also fix the static blade 132 on the pressure seat 131 to prevent the static blade 132 from shaking, thereby strengthening the structural strength of the overall pressure member 13 to reduce vibration, so that the entire fan blade assembly 1 can run more stably and smoothly.

[0055] It can be understood that the smooth transition of the first cover 121, the second cover 122 and the third cover 123 is that the inner surface of the first cover 121 at the connection between the first cover 121 and the second cover 122 is kept flush with the outer surface of the second cover 122, and the inner surface of the second cover 122 at the connection between the second cover 122 and the third cover 123 is kept flush with the outer surface of the third cover 123. The smooth transition of the outer surface of the pressurizing seat 131 and the outer surface of the rotating seat 111 is that the radial radius of the pressurizing seat 131 and the rotating seat 111 gradually increases, and there is no reduction. Thereby, the transition of the wind flow channel 161 formed between the first wind flow channel surface 16 and the second wind flow channel surface 19 at each connection and gap can be more natural, so that when the wind flow is pressurized in the wind flow channel 161, the wind flow can flow more smoothly in the wind flow channel 161, so as to reduce the loss of wind volume and increase the rate of wind speed increase. In addition, the first wind flow channel surface 16 and the second wind flow channel surface 19 formed by smooth transition can reduce wind resistance and wind noise.

[0056] 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, so that the airflow sent by the fan blade 112 is 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 stationary blade 132, thereby slightly increasing the volume there, so that the airflow sent by the fan blade 112 can be temporarily buffered there, and after buffering, it enters the space between the supercharger 12 and the pressure member 13 along the arc surface for continued supercharging and then sent out, achieving effective guidance of the airflow, reducing the formation of vortices, improving the stability of the airflow flowing into the pressure member 13 and the inner surface of the supercharger 12, and further reducing the loss of the airflow in the gap between the fan blade 112 and the stationary blade 132.

[0057] More specifically, the part of the supercharger 12 with a gradually increasing radial radius is the second cover 122, and 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 up of the wind flow. The protruding position of the arc surface formed by the first wind flow 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. And the height of the reinforcing ribs 1221 gradually decreases along the wind flow 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.

[0058] See also Figure 2-Figure 4 Furthermore, 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 housing 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 air flow channel surface 16 is more natural and smooth, and the gradual pressurization of the air flow sent by the fan blades 112 is achieved, making the process of pressurizing the air flow more stable, ensuring the stability of the air flow during the pressurization process, thereby reducing the fluctuation and vortex phenomenon of the air flow and improving the stability of the overall air flow; and by setting the radial diameter D1 (such as Figure 2 The radial diameter D1 of the air outlet 1211 is 44.9-48.9 mm, and the radial diameter D2 of the air outlet 1211 is 44.9-48.9 mm. Figure 2 As shown, D2) is 53.4-57.4 mm, thereby limiting the radial diameter range of the supercharger 12, 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.

[0059] 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 limitation 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.

[0060] 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. Both ends of the second cover 122 are detachably connected to the first cover 121 and the third cover 123, respectively, so as to facilitate the assembly and disassembly of the fan blade assembly 1.

[0061] Please combine Figure 3 and Figure 6 Furthermore, from the air inlet end 151 to the air outlet end 152, the rotating seat 111 includes a rear air guide portion 1111, a blade connecting portion 1112 and a front air guide portion 1113 which are arranged in sequence along the axial direction, and a plurality of blades 112 are distributed on the blade connecting portion 1112 at intervals; from the rear end of the rear air guide portion 1111 to the front end of the blade connecting portion 1112, the radial radius of the rotating seat 111 gradually increases.

[0062] Specifically, the fan blades 112 are spaced apart on the surface of the rotating seat 111 and spirally extend in a direction in which the radial radius of the rotating seat 111 gradually increases. The rear air guide 1111 can guide part of the airflow entering the supercharger 12 from the outside more evenly to the fan blades 112. The front air guide 1113 can guide part of the airflow accelerated by the fan blades 112 more evenly, reducing the loss of air volume caused by the cross section of the airflow sent out from the root of the fan blade 112.

[0063] 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 realizing the gradual pressurization and acceleration 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 the sudden acceleration during the rotation of the fan blade 112, and making the pressurization and acceleration 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 wind volume on the surface of the rotating seat 111, so as to achieve a better operation 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 phenomena during mixed flow operation, thereby improving the smoothness and stability of the wind flow, and helping to maximize the wind volume and wind pressure generated by the fan assembly 11.

[0064] Specifically, the increase in the radial radius of the front wind guide 1113 is negligible compared to the increase in the radial radius of the rear wind guide 1111 and the fan blade connection 1112, that is, even if the radial radius of the front wind guide 1113 remains constant, it can be the same as the maximum radius range or maximum value of the fan blade connection 1112, and the surface of the front wind guide 1113 can be parallel to the axis of the rotating seat 111, so that the wind passing through the surface of the front wind guide 1113 can easily form a direct current wind outlet parallel to the axis of the rotating seat 111. In addition, the radial radius of the front wind guide 1113 remains constant, which is more conducive to maintaining the wind speed of the wind flow outlet through the surface of the fan blade connection 1112.

[0065] See also Figure 4 , further, a supercharger 12 is formed inside the supercharger; the supercharger zone includes an area from the rear end of the rear air guide 1111 to the front end of the pressurized seat 131, and the axial length M of the supercharger zone (such as Figure 4 M) shown is 42.6-50.6mm.

[0066] It can be understood that setting the boost zone to achieve boosting and speeding up the wind flow can avoid local excessively high or low wind flow speeds and reduce unnecessary airflow interference, making the entire boosting and speeding up process smoother. The axial length M of the boost zone is limited to 42-46 mm, which can achieve a smooth boosting and speeding up of the wind flow inside the fan blade assembly 1 within a short distance, which is conducive to miniaturizing the fan blade assembly 1, making the structure more beautiful and easier to carry.

[0067] See also Figure 6 Furthermore, the axial length P2 of the blade connection portion 1112 (eg Figure 6 The axial length P2 shown in FIG. 114 may be greater than the axial length P3 of the front air guide portion 1113 (as shown in FIG. Figure 6 P3) and the axial length P1 of the rear air guide portion 1111 (as shown Figure 6 P1 as shown above) to more effectively promote air flow and reduce air flow separation, thereby improving the overall air flow efficiency and wind pressure of the fan assembly 11. The axial length P3 of the front air guide 1113 is greater than the axial length P1 of the rear air guide 1111, thereby ensuring the air guide length of the front air guide 1111, facilitating the airflow sent out through the fan blades 112 to be sent out along the front air guide 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 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 of the fan blades 12.

[0068] Optionally, the axial length of the fan blade connection portion 1112 is equal to the axial length P0 of the entire rotating seat 111 (eg Figure 6P0) is between 1 / 2 and 3 / 4, 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 a stronger wind flow, deliver a larger air volume and increase the wind flow pressurization effect.

[0069] See also Figure 6 Furthermore, 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 connecting portion, and the axial length P2 of the fan blade connecting portion 112 is 12-16mm. The control within 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 connecting portion 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.

[0070] See also Figure 8 Furthermore, a mounting groove 1114 is provided on the inner side of the rotating seat 111 , and the groove wall of the mounting groove 1114 and the rotating seat 111 form a double-layer structure, and the mounting groove 1114 is used to install the motor assembly.

[0071] 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 a plurality of connection structures arranged at intervals, thereby improving the stability between the two-layer structure. Other components of the portable fan 3, such as a motor assembly, can be installed in the mounting groove 1114. The connection between the fan assembly 11 and other components is achieved without affecting the rotation of the fan assembly 11, and the ring side corresponding to the mounting groove 1114 on the pressurizing seat 131 is set as a double-layer structure to improve the protection effect of the components inside the mounting groove 1114. At the same time, the double-layer structure is also used to reduce the noise of the components located in the mounting groove 1114.

[0072] See also Figure 6 and Figure 7Furthermore, the fan blade 112 includes a fan blade top end 1121 and a fan blade root end 1122 as well as a fan blade head end 1123 and a fan blade tail end 1124. The fan blade root end 1122 is an end connected to the fan blade connection portion 1112; the fan blade top end 1121 is an end away from the fan blade root end 1122, that is, an end close to the inner surface of the supercharger 12; the fan blade head end 1123 is an end close to the pressure member 13; the fan blade tail end 1124 is an end away from the pressure member 13, and an end corresponding to the air outlet end 152 of the shell 15. The installation angle β (such as Figure 6 The installation angle γ of the top 1121 of the blade 112 (as shown in Figure 7 The angle γ shown in the figure is 47-53°, which can ensure the bending degree of the fan blade 112 on the fan blade connection portion 1112 to achieve the maximum air supply and wind speed. The installation angle β of the fan blade root end 1122 is smaller than the installation angle γ of the fan blade top end 1121, so that the bending degree of the fan blade top end 1121 on the fan blade 112 is greater than the bending degree of the fan blade root end 1122, thereby increasing the kinetic energy of the wind flow at the fan blade top end 1121 to enhance the wind pressure output.

[0073] See also Figure 5 Furthermore, the gap width G1 between the top 1121 of the blade 112 and the inner surface of the supercharger 12 (eg Figure 5 As shown in FIG. 1 , G1) 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 can be reduced 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.

[0074] See also Figure 8 Furthermore, the radial radius R1 of the rotating seat 111 at the corresponding position of the blade head end 1123 of the blade 112 (such as Figure 4 The radial radius R1 of the rotating seat 111 at the corresponding position of the blade tail end 1124 of the blade 112 (as shown in FIG. Figure 4 The radial radius R2 of the boundary portion of the rear air guide portion 1111 is 8-12 mm, and the radial radius R3 of the boundary portion of the rear air guide portion 1111 is 8-12 mm. Figure 4The R3 shown is 2.62-6.62mm. The increase in the radial radius of the blade connection part 1112 is smaller than that of the rear air guide part 1111, and the slope from the blade connection part 1112 to the front air guide part 1113 is made gentler, which is conducive to the rapid generation and rapid pressure increase of the wind flow on the blade connection part 1112, and when the blade 112 guides the wind flow, part of the wind flow guided along the surface of the blade connection part 1112 can be smoothly guided along the front air guide part 1113, which is conducive to achieving a more stable pressure increase and speed increase of the wind flow, and further reducing noise.

[0075] See also Figure 6 and Fig. 9 Furthermore, among any two adjacent fan blades 112, the blade head end 1123 of one of the fan blades 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 guiding channels between any two adjacent fan blades 112 cannot form an air guiding 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 guiding length and the curvature of the wind guiding route between the two adjacent fan blades 112, which is conducive to delivering a larger air volume, faster speed and stronger wind flow.

[0076] It should be noted that the number of blades 112 on the fan assembly 11 is an odd number, for example, 7, 9, 11, etc., which can be set according to the actual situation, and this embodiment does not limit 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, causing fatigue or even breakage of the blades. And setting the number of blades 112 to an odd number can form a more complex and effective airflow pattern when rotating, and enhance the air supply effect of the fan assembly 11. In this embodiment, the number of blades 112 is greater than the number of static blades 132, so that the spacing between adjacent blades 112 is greater than the spacing between adjacent static blades 132, so that there is a larger wind guide range between the static blades 132, which is more conducive to the wind guide between the blades 112 and the static blades 132. In addition, the larger spacing between adjacent static blades 132 can reduce the resistance of the wind flow between the static blades 132, thereby improving the working efficiency of the blade assembly 1 and obtaining a stronger air volume output.

[0077] See also Figure 4Furthermore, the outer diameter of the end of the front air guide 1113 close to the pressurizing seat 131 is less than 2 mm from the outer diameter of the end of the pressurizing seat 131 close to the rotating seat 111, thereby reducing the difference between the outer diameters of the end of the front air guide 1113 close to the pressurizing seat 131 and the end of the pressurizing 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 pressurizing seat 131 increasing along the wind direction, so that the rotating seat 111 and the pressurizing seat 131 are The radial radius increases continuously and incrementally along the wind direction, so that the width of the wind channel 161 decreases continuously and incrementally, and the pressure of the wind in the wind channel 161 increases continuously and incrementally, so as to further balance the pressure increase effect of the wind in the entire wind channel 161, provide a more uniform wind output, avoid sudden fluctuations in the wind during the pressure increase and speed increase process, and reduce eddy and turbulent phenomena in the wind, making the airflow more stable. In addition, the stable airflow can also reduce vibration and noise.

[0078] See also Figure 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, and the outer diameter of the protrusion 171 is larger than the outer diameter of the rear end of the rear air guide portion 1111, and smaller than the outer diameter of the front end of the rear air guide portion 1111 on the rotating seat 111.

[0079] 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, and the rear cover 17 covers the air inlet end of the housing 15. The front end of the rear air guide portion 1111 is an end away from the fan blade connection portion 1112, and the front end of the rear air guide portion 1111 is an end connected to the fan blade connection portion 1112. The diameter of the protrusion 171 on the rear cover 17 is set to be 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 connecting 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 wind flow entering the supercharger along the protrusion 171 will not be blocked by the cross-section of the rotating seat 111 at one 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.

[0080] See also Figure 2 and Figure 4 Furthermore, 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 .

[0081] 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 an end connected to the pressurizing seat 131; the stator blade tip 1323 is an end away from the stator blade root end 1324, that is, an end close to the inner surface of the supercharger 12; the stator blade head end 1325 is an end away from the fan assembly 11, and corresponds to an end of the air outlet end 152 of the housing 15; the stator blade tail end 1326 is an end close to the fan assembly 11.

[0082] See also Fig.11 and Fig.12 , the axial length W1 of the stationary blade 132 (such as Fig. 9 W1) is the length of the entire length of the stationary blade 132 in the axial direction of the pressure member 13. The axial length W2 (as shown in Fig. 9 W2) is the length of the entire length of the pressurizing seat 131 corresponding to the axial direction of the pressurizing member 13. The axial length W1 of the stationary blade 132 is greater than the axial length W2 of the pressurizing seat 131, so that at least one end of the stationary blade 132 can extend out of the pressurizing seat 131 in the radial direction relative to the pressurizing seat 131. And the axial length of the stationary blade root end 1324 of the stationary blade 132 is equal to the axial length of the pressurizing seat 131, so that the axial length W1 of the stationary blade 132 gradually increases from the stationary blade root end 1324 to the stationary blade top end 1323, so that the stationary blade tail end 1326 of the stationary blade 132 close to the fan blade 112 is inclined toward the fan blade 112, and it is ensured that the axial length of at least part of the stationary blade 132 in the increased part is greater than the axial length W2 of the pressurizing seat 131, so that at least one end of the stationary blade 132 can extend out of the pressurizing seat 131 in the radial direction.

[0083] See also Figure 10-12The 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 a portion of the pressurizing seat 131 with a gradually increasing radial radius; the stationary blade top end 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 top end 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 axial extension of the extension portion 1322 is to extend in a direction in which the radial radius of the pressurizing seat 131 gradually decreases, so as to extend out of the pressurizing seat 131, and axially extend to between the front wind guide portion 1113 and the first wind flow channel surface 16, so that part of the wind flow sent out by the fan blades 112 on the fan assembly 11 first passes through the static blade tail end 1326 of the static blade 132 and then is guided out of the outside along the pressurizing seat 131. Thereby, the distance between the static blades 132 on the fan assembly 11 and the fan blades 112 on the pressurizing seat 131 is reduced, so that the wind flow sent out by the fan blades 112 can be more efficiently transferred to the pressurizing member 13. And the static blades 132 extend through the gap between the pressurizing seat 131 and the rotating seat 111, so the fan blades 112 will directly transfer the wind flow to the static blades 132 on the rotating seat 111, further reducing the loss of the wind flow sent out by the fan blades 112 at the gap between the pressurizing seat 131 and the rotating seat 111, thereby increasing the amount of air sent out. When the connection 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 wind guiding distance of the pressurizing member 13 in the wind outlet area can be increased, which is more conducive to wind guiding.

[0084] It should be noted that, although the extension portion 1322 of the stationary blade 132 of the pressure member 13 extends to between the front wind guide portion 1113 and the first air flow channel surface 16, a second gap Z (such as Figure 5 Z as shown) 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. And the second gap Z gradually decreases from the direction of the stator blade root end 1324 of the stator blade 132 to the stator blade top end 1323. 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, so that the wind guide distance between the stator 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 guide between the fan blade 112 and the stator 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.

[0085] See also Figure 5Furthermore, the range of the second gap Z is 1.5-10 mm, which not only ensures that there is no direct contact between the stationary blades 132 and the fan blades 112, but also reduces the wind guiding distance between the fan blades 112 and the stationary blades 132 as much as possible to achieve the optimal wind guiding effect.

[0086] Furthermore, the axial length W2 of the pressurizing seat 131 is 20.7 mm-22.7 mm, and the axial length W1 of the stationary blade 132 is 23.2 mm-25.2 mm. The setting of this range ensures that the stationary blade 132 can extend out of the pressurizing seat 131 and ensures that the stationary blade 132 on the pressurizing member 13 can achieve a better wind guiding effect.

[0087] See also Figure 10-12 Furthermore, the extension portion 1322 is arc-shaped, which can more effectively guide the wind flow sent out by the fan blades 112 on the fan assembly 11, and increase the smoothness and stability of the wind flow. Fig.11 h) increases in the direction of the gradually decreasing radial radius of the pressurizing seat 131, and ensures that the top 1323 of the stator blade of the extension part 1322 is kept flush at each position, thereby ensuring the stability of the stator blade top 1323 at each position of the extension part 1322 when connected with the inner surface of the second cover 122. When the connecting part 1321 is in a straight line, the straight line is a shape perpendicular to the surface of the first cover 121 and the pressurizing seat 131, which can make the connecting part 1321 have better strength and rigidity, can 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 shape, so that the wind flow enters the extension part 1322 and the connecting part 1321 in turn from the mixed direction wind flow state, and after combing, it can form a direct current wind parallel to the axial direction of the pressurizing seat 131 to blow out, so as to increase the blowing distance, reduce turbulence, noise and vibration, reduce the noise emitted by turbulent crosstalk, and achieve noise reduction, so as to convert sharp noise into low sound. Moreover, the bending direction of the extension portion 1322 is opposite to the bending direction of the stationary blades 132, which is conducive to achieving a natural arc transition between the fan blades 112 and the stationary blades 132, so that the airflow sent out by the fan blades 112 can more easily enter between the stationary blades 132 and be combed by the stationary blades 132 to form a direct current wind to enter the outside.

[0088] See also Figure 5 Further, the gap width G2 (eg, Figure 5 G2) shown in the figure is smaller than the gap width G1 between the top 1121 of the fan blade 112 and the inner surface of the supercharger 12, which 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 stationary blade 132 at a high wind speed.

[0089] 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, thereby avoiding the situation where the airflow is decelerated when passing through gaps of different widths.

[0090] Optionally, when the distance between the top end 1323 of the stationary blade of the extension 1322 and the inner surface of the supercharger 12 is too close, the gap width G2 between the two can also be ignored. Or the top end 1323 of the stationary blade of the extension 1322 will directly abut and contact the inner surface of the supercharger 12. In both cases, the value of the gap width G2 is 0. Therefore, the abutment of the extension 1322 improves the stability of the connection between the supercharger 12 and the pressure member 13, thereby improving the stability of the air guide between the two.

[0091] See also Figure 6 , Figure 7 and Fig.10 Furthermore, the installation angles of the blade 112 include the installation angle β of the blade root end 1122 and the installation angle γ of the blade tip 1121, both of which can be greater than the installation angle α of the stationary blade 132 (such as Fig. 9 As shown in α), the curvature of the fan blade 112 is greater than that of the stationary blade 132, which is conducive to the wind flow sent by the fan blade 112 to be more smoothly introduced between the stationary 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 stationary 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.

[0092] See also Fig.10 Furthermore, the installation angle α of the extension portion 1322 of the stationary blade 132 is 14-30°, which can achieve a natural transition from the arc-shaped extension portion 1322 to the straight connecting portion 1321 on the stationary blade 132, avoid the influence of the folded angle on the wind flow, and achieve effective wind guidance of the wind flow sent by the blades on the fan assembly 11, and can achieve a natural transition of the wind flow introduced from the arc-shaped extension portion 1322 to the straight connecting portion 1321, so that the wind guidance of the stationary blade 132 and the combing of the wind flow are more natural and smooth.

[0093] See also Figure 10-12Further, the pressurizing seat 131 includes a front end 1311 and a rear end 1312, and the front end 1311 and the rear end 1312 correspond to the stationary blade root end 1324 of the connecting portion 1321 and the stationary blade root end 1324 of the extending portion 1322, respectively. The radial radius of the rear end 1312 gradually increases to the radial radius of the front end 1311 in the direction close to the front end 1311, and the radial radius of the front end 1311 is greater than the radial radius of the 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 wind flow is between the extension parts 1322, the wind flow introduced by the extension part 1322 of the stationary blades 132 can be gradually pressurized, so that the pressurization process of the wind flow by the pressure piece 13 is more balanced; and when the wind flow of the stationary blades 132 enters between the connecting part 1321, when the wind flow 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 wind flow can form a direct current wind that is blown out parallel to the axial direction of the pressure piece 13, thereby not only achieving continuous pressurization of the wind flow sent out by the fan assembly 11 through the pressure piece 13, but also guiding the direction of the pressurized wind flow. The boundary radial diameter K1 (such as Fig.11 The radial diameter K1 is 36 mm to 40 mm, and the radial diameter K2 of the outer surface of the rear end 1312 of the pressurizing seat 131 is 36 mm to 40 mm. Fig.11 As shown, K2) is 31mm-35mm, thereby defining the upper and lower limits of the pressurization of the pressurizing member 13, so that the wind flow passing through the pressurizing seat 131 can be steadily pressurized within a smaller range, thereby making the final delivered wind flow wind speed and wind pressure more stable.

[0094] It should be noted that the portion where the first cover 121 is connected to the stationary blade 132 corresponds to the front end 1311 of the pressurizing seat 131, and the first cover 121 extends in a direction away from the rear end 1312 of the pressurizing seat 131, so as to extend out of the pressurizing seat 131 and enter the outside world, forming an air inlet 1231, and the inner wall of the air inlet 1231 is in a smooth arc shape. The extension direction of the first cover 121 is opposite to the extension direction of the extension portion 1322 of the stationary blade 132, and the radial radius of the air inlet 1231 gradually increases along the extension direction of the first cover 121, and presents a smooth arc surface structure, which is more conducive to smoother air discharge from the air inlet 1231 and expands the range of air discharge.

[0095] See also Fig.12 Further, the distance E between the outer surface of the front end 1311 of the pressurizing seat 131 and the inner surface of the first cover 121 (eg Fig.12 E) is 5.8mm-7.8mm, which limits the size of the air inlet 1231 for the final air outlet, so that the air inlet 1231 within this range can effectively concentrate the airflow, increase the wind speed, and make the user feel a stronger wind feeling.

[0096] See also Fig.13 The second embodiment of the invention 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, and the power supply unit 2 and the motor 14 are electrically connected to drive the fan assembly 11 to rotate.

[0097] 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 the airflow. The power supply unit 2 can be a handheld assembly for the user to hold or stand on a plane, 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 implementation comparison is not limited, and it is sufficient that 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.

[0098] See also Figure 4 Specifically, a mounting groove 1114 is provided on one side of the rotating seat 111 close to the pressure member 13, and a mounting cavity 1313 is provided on one side of the pressure member 13 close to the rotating seat 111. The mounting groove 1114 and the mounting cavity 1313 are opposite to each other and form a mounting space, and the motor 14 is accommodated in the mounting space. The fan assembly 11 is specifically driven by the motor 14 to rotate the fan assembly 11 as a whole, thereby driving the fan blades 112 to rotate.

[0099] It can be understood that the fan blade assembly 1 further includes a display assembly 18, and the display assembly 18 is arranged on a side of the pressurizing seat 131 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.

[0100] Compared with the prior art, the fan blade assembly and the portable fan provided by the present invention have the following advantages:

[0101] 1. An embodiment of the present invention provides a fan blade assembly, which is configured such that the cross-sectional area of ​​the wind flow channel formed between the inner surface of the supercharger and the outer surface of the rotating seat and the outer surface of the pressurizing seat gradually decreases in the axial direction from the air inlet end to the air outlet end, so that the cross-sectional area of ​​the wind flow channel formed between the inner surface of the supercharger and the rotating seat is larger than the cross-sectional area of ​​the wind flow channel formed between the inner surface of the supercharger and the pressurizing seat, thereby realizing that the cross-sectional area of ​​the wind flow channel formed inside the fan blade assembly gradually decreases along the wind flow direction, thereby realizing the gradual pressurization and acceleration of the wind flow in the wind flow channel along the wind flow direction, making the pressurization and acceleration of the wind flow in the fan blade assembly more balanced, thereby evenly increasing the wind pressure and wind speed, and making the wind pressure and wind speed of the wind flow finally blown out of the fan blade assembly more stable.

[0102] 2. By setting the axial length of the supercharger to be greater than the sum of the axial lengths of the fan assembly and the pressure seat, the supercharger can surround the entire fan assembly and the pressure seat, so that the wind can be pressurized and accelerated on the fan assembly and the pressure member; and by setting the radial radius of part of the supercharger to gradually increase along the wind flow direction, the increasing direction of the radial radius of the supercharger is consistent with the decreasing direction of the radial radius of the pressure seat and the rotating seat, so that the inner surface of the supercharger can adapt to the shape of the surface of the pressure seat and the rotating seat, so that the entire wind flow channel can have a more natural transition, thereby making the process of supercharging the wind flow more stable, ensuring the stability of the wind flow during the supercharging process, reducing the fluctuation and vortex phenomenon of the wind flow, and improving the overall stability of the wind flow. In addition, the supercharger can also form a double-layer structure with the shell to further protect the fan assembly and the pressure member and reduce noise.

[0103] 3. By setting the inner surfaces of the first cover, the second cover and the third cover to smoothly transition to form the first wind channel surface, the transition of the connection between the first cover, the second cover and the third cover is more natural, so that the wind channel transition formed by the smooth transition of the outer surface of the pressurizing seat and the outer surface of the rotating seat to form the second wind channel surface can be more natural, so that when the wind flow is pressurized in the wind channel, the wind flow can flow more smoothly in the wind channel, so as to reduce the loss of wind volume and increase the rate of wind speed increase. In addition, the first wind channel surface and the second wind channel surface formed by the smooth transition can reduce wind resistance and reduce wind noise.

[0104] 4. By arranging a plurality of fan blades distributed at intervals on the fan blade connecting portion, part of the wind flow entering the portable fan is introduced onto the stationary blades through the rear air guide portion, and part of the wind flow sent out by the fan blades is sent out along the front air guide portion, thereby avoiding the loss of wind flow when entering the fan assembly and the loss when sending out the fan assembly; and by arranging that 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, the surface of the rotating seat gradually rises relative to the axis of the rotating seat along the fan direction, so as to realize the seamless connection of the radial radius increasing between the rear air guide portion and the fan blade connecting portion, so as to facilitate the gradual pressure increase of the wind flow on the surface of the rotating seat along the wind flow direction.

[0105] 5. By setting the outer diameter of the front air guide close to the end of the pressurizing seat to be less than 2mm different from the outer diameter of the pressurizing seat close to the rotating seat, the maximum radial radius of the rotating seat that increases along the wind direction can be approximately the initial radial radius of the pressurizing seat that increases along the wind direction, so that the radial radius of the rotating seat and the pressurizing seat increases continuously and incrementally along the wind direction, and the width and cross-sectional area of ​​the wind channel decrease continuously and incrementally, so that the pressure of the wind in the wind channel increases continuously and incrementally, so as to further balance the pressure-boosting effect of the wind in the entire wind channel, provide a more uniform wind output, avoid sudden fluctuations in the wind during the pressurization and acceleration process, and reduce eddy and turbulent phenomena in the wind, making the airflow more stable. In addition, the smooth airflow can also reduce vibration and noise.

[0106] 6. By setting the outer diameter of the protrusion on the rear cover to be larger than the outer diameter of the port of the rear air guide part and smaller than the front end outer diameter of the rear air guide part, the airflow entering the supercharger along the protrusion will not be blocked by the cross-section of the end of the rotating seat close to the rear cover, but will be directly introduced along the outer surface of the pressurizing seat, making the airflow introduction of the entire fan assembly easier and smoother.

[0107] 7. By setting the stationary blades on the pressurizing seat to extend axially outside the pressurizing seat and to extend between the front wind guide and the first wind flow channel surface, the distance between the stationary blades on the fan assembly and the fan blades on the pressurizing seat is reduced, so that the wind flow sent by the fan blades can be more efficiently transferred to the pressurizing member. And the stationary blades extend through the gap between the pressurizing seat and the rotating seat, so the fan blades will directly transfer the wind flow to the stationary blades on the rotating seat, further reducing the loss of the wind flow sent by the fan blades in the gap between the pressurizing seat and the rotating seat, thereby increasing the amount of wind sent.

[0108] 8. By defining the area from the rear end of the rear air guide to the front end of the pressurized seat as the supercharging area, the airflow can be pressurized and accelerated in the supercharging area, which can avoid local excessively high or low airflow speeds and reduce unnecessary airflow interference, making the entire supercharging and acceleration process smoother.

[0109] 9. The present invention also provides a portable fan having the same beneficial effects as the above-mentioned fan blade assembly, which will not be described in detail here.

[0110] The above is a detailed introduction to a fan blade assembly and a portable fan disclosed in an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention, and any modifications, equivalent substitutions and improvements made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan blade assembly, characterized in that: include: The shell is connected internally and includes an air inlet and an air outlet; A pressurized component, including a pressurized seat and a plurality of stationary blades; A fan assembly is arranged in sequence with the pressure member along the axial direction, and the fan assembly includes a rotating seat and a plurality of fan blades; A supercharger is disposed inside the housing and penetrates through the inside of the housing and surrounds the radial periphery of the fan assembly and the pressurizing member; Among them, in the axial direction from the air inlet end to the air outlet end, an air flow channel is formed between the inner surface of the supercharger, the outer surface of the rotating seat and the outer surface of the pressurizing seat, and the cross-sectional area of ​​the air flow channel gradually decreases.

2. The fan blade assembly according to claim 1, characterized in that: The axial length of the supercharger is greater than the sum of the axial lengths of the fan assembly and the pressure member; the radial radius of part of the supercharger gradually increases along the flow direction of the wind.

3. The fan blade assembly according to claim 2, characterized in that: The supercharger comprises a first cover, a second cover and a third cover which are connected in sequence axially, 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; The inner surfaces of the first cover, the second cover and the third cover smoothly transition to form a first airflow channel surface; the outer surface of the pressurizing seat and the outer surface of the rotating seat smoothly transition to form a second airflow channel surface, and the airflow channel is formed between the first airflow channel surface and the second airflow channel surface.

4. The fan blade assembly according to claim 3, characterized in that: From the air inlet end to the air outlet end, the rotating seat includes a rear air guide portion, a blade connecting portion and a front air guide portion which are arranged in sequence along the axial direction, and a plurality of blades are distributed on the blade connecting portion at intervals; from the rear end of the rear air guide portion to the front end of the blade connecting portion, the radial radius of the rotating seat gradually increases.

5. The fan blade assembly according to claim 4, characterized in that: The outer diameter of the front air guide portion close to the pressure seat is less than 2 mm different from the outer diameter of the pressure seat close to the rotating seat.

6. The fan blade assembly according to claim 4, characterized in that: A rear cover is arranged on the air inlet end, and a protrusion is arranged on the side of the rear cover facing the inside of the shell, and the outer diameter of the protrusion is larger than the outer diameter of the rear end of the rear air guide part and smaller than the outer diameter of the front end of the rear air guide part.

7. The fan blade assembly according to claim 4, characterized in that: The stationary blades axially extend out of the pressure seat and extend to between the front wind guide portion and the first wind flow channel surface.

8. The fan blade assembly according to claim 7, characterized in that: A supercharging zone is formed inside the supercharger; the supercharging zone includes a region from the rear end of the rear air guide portion to the front end of the pressurizing seat, and the axial length of the supercharging zone is 42.6-50.6 mm.

9. The fan blade assembly according to claim 2, characterized in that: The axial length of the supercharger is 50.5-58.5 mm.

10. A portable fan, characterized in that: It includes the fan blade assembly as described in any one of claims 1-9, and also includes a motor and a power supply unit, the motor is arranged inside the fan blade assembly, the power supply unit is arranged outside the fan blade assembly, and the power supply unit and the motor are electrically connected to drive the fan assembly to rotate.

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