Fan blade with optimized structure

Abstract

The utility model discloses a fan blade with an optimized structure. The fan blade comprises a hub and a plurality of blades arranged on the periphery of the hub in a surrounding mode. A mounting hole is formed in the axis of the hub in a penetrating mode, and a first assembling face and a second assembling face are arranged on the two sides of the hub respectively. Each blade comprises a front end part, a middle rotating part and an empennage which are integrally formed, the front end part is obliquely connected with the side edge of the hub, the front end part forms a first concave arc-shaped structure which is concave towards the second assembly surface, and the middle rotating part is clockwise and spirally arranged outwards from the front end part, so that the end part of the empennage is reversely folded towards the first assembly surface; the horizontal projection of the middle rotating part is higher than the front side edge and the rear side edge of the front end part, a first outer arc edge and a first inner arc edge are formed on the two side edges of the middle rotating part respectively, and the radian of the first inner arc edge is larger than the average radian of the first outer arc edge. By optimizing the structural design of the blades, the noise is reduced, and the fan has the advantages of improving the air volume and reducing the energy consumption.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fan blade field, especially a fan blade with optimized structure. BACKGROUND

[0002] A fan is a kind of household appliance that uses a motor to drive fan blades to rotate to accelerate air circulation, mainly used for cooling and air circulation, and the fan blade is the key part of the fan to generate wind force. When the motor drives the fan blade to rotate, the fan blade will push the surrounding air to make it flow, thereby forming an air current. This is the basis for the fan to achieve heat dissipation, ventilation and other functions.

[0003] With the continuous improvement of people's living standards, the performance requirements of the fan are also getting higher and higher, requiring not only high air volume but also low noise. At present, the common practice to increase the wind power of the fan on the market is to enhance the driving force of the motor, which will cause the cost to rise. At present, the fan blade structure is only a simple curved surface design, which cannot meet the market demand for silence and strong wind power. SUMMARY

[0004] The utility model aims at overcoming the above-mentioned defects in the prior art, providing a fan blade with optimized structure, which not only improves the wind power output of the fan, but also reduces the noise to some extent, thereby improving the overall performance and user experience of the fan.

[0005] To achieve the above-mentioned purpose, the utility model provides a fan blade with optimized structure, which comprises a hub and a plurality of blades arranged around the hub.

[0006] An installation hole is arranged through the axis of the hub, and the two sides of the hub are respectively a first assembly surface and a second assembly surface.

[0007] Each blade comprises an integrally formed front end, a middle rotating part and a tail wing. The front end is inclined to connect with the side edge of the hub. The front end forms a first inner concave arc structure recessed towards the second assembly surface. The middle rotating part is arranged outward in a clockwise spiral from the front end, and the end of the tail wing is folded back towards the first assembly surface. The horizontal projection of the middle rotating part is higher than the front and rear sides of the front end. The two sides of the middle rotating part form a first outer arc side and a first inner arc side. The arc of the first inner arc side is larger than the average arc of the first outer arc side.

[0008] Further, a thickening part is arranged on the middle back of the tail wing, and the thickening part and the two ends of the tail wing form an arc structure protruding towards the second assembly surface. The thickening part improves the rigidity of the tail wing, making it less likely to deform or be damaged under high speed or high load conditions. The thickening part and the two ends of the tail wing form an arc structure protruding towards the second assembly surface, which helps to optimize the air flow, reduce resistance and improve the wind power.

[0009] Furthermore, the tail fin's tip is an arc-shaped blade tip, and the angle between the intersecting tangents of the two arc-shaped structures on either side of the blade tip is α1, with α1 ranging from 50° to 55°. By designing the tail fin's tip as an arc-shaped blade tip and specifying the angle between the intersecting tangents of the two arc-shaped structures on either side of the blade tip as 50° to 55°, the aim is to optimize the fan blade's aerodynamic performance. The arc-shaped blade tip design helps reduce air resistance, improves fan efficiency, and thus achieves higher airflow output. Simultaneously, the reasonable angle range effectively reduces noise generated during fan blade rotation, improving the fan's quietness.

[0010] Furthermore, the line connecting the midpoint A of the horizontal projection of the connection between the front end and the hub is L1, and the line connecting the tangent point Q1 of the blade tip and the center point C of the hub is L2. The angle between L1 and L2 is α2, and the angle range of α2 is 30°~35°. This design effectively reduces fan operating noise while increasing airflow output, meeting the market demand for high-airflow and low-noise fans.

[0011] Furthermore, the first outer arc edge includes a first smooth portion, a second smooth portion, and a first curved portion connected in sequence. The curvature of the first smooth portion is smaller than that of the first curved portion, and the curvature of the second smooth portion is smaller than that of the first smooth portion. The smaller curvature of the first smooth portion allows some airflow to be diverted to the second smooth portion. The curvature of the second smooth portion is further reduced, allowing the airflow to form a relatively flat outlet channel in the middle stage. The larger curvature of the first curved portion not only allows the tail fin to form its final reverse fold, but also diverts the airflow input from the tail fin to the second smooth portion, thereby forming a good airflow acceleration channel and improving wind power output.

[0012] Furthermore, the ratio of the curvature of the second smooth portion to the curvature of the first curved portion is 1:3 to 1:3.5, and the ratio of the curvature of the second smooth portion to the curvature of the first smooth portion is 1:1.4 to 1:1.5. This helps to further optimize the airflow distribution of the fan blades, reduce airflow turbulence, and thus achieve a quiet operation.

[0013] Furthermore, the hub includes a bushing extending towards the second mounting surface, through which the mounting hole passes, and a connecting groove for snap-fit ​​is provided on the bushing. This facilitates linkage with a fan motor.

[0014] Furthermore, a circumferential reinforcing rib assembly is connected to the outer side of the bushing, the rib assembly being disposed along the outer surface of the bushing and extending to the inner wall of the hub. This reinforcing rib assembly significantly enhances structural strength, rigidity, torsional resistance, and stability, improving overall performance and reliability.

[0015] Furthermore, the number of blades is seven. This provides sufficient airflow and air pressure while maintaining high aerodynamic efficiency.

[0016] Furthermore, the angle between the tangent of the projection of the connection point between the front end and the hub onto the plane containing the hub axis and the hub axis is 45°. This optimizes airflow, increases air volume and air pressure, reduces noise, enhances structural strength, improves energy transfer efficiency, increases stability, simplifies manufacturing processes, enhances aesthetics, and adapts to various application scenarios, thereby significantly improving the overall performance and user experience of the fan.

[0017] Compared with the prior art, the present invention has the following advantages: By optimizing the structural design of the blades, especially the shape and angle of the front end, the middle rotor and the tail fin, the present invention makes full use of the aerodynamic principle, thereby increasing the air volume without increasing the motor power, while reducing noise, and has the advantages of increasing air volume, reducing noise and reducing energy consumption. Attached Figure Description

[0018] To more clearly illustrate the technology in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an optimized fan blade according to this utility model;

[0020] Figure 2 yes Figure 1 Another perspective illustration;

[0021] Figure 3 This is a side view of the present invention;

[0022] Figure 4 This is a schematic diagram showing the labeled parameters of the blade of this utility model;

[0023] Figure 5 This is a schematic diagram of the airflow of this utility model.

[0024] The diagram includes:

[0025] 1. Hub; 11. Mounting hole; 12. First mounting surface; 13. Second mounting surface; 14. Bushing; 15. Connecting slot; 16. Reinforcing rib group; 2. Blade; 21. Front end; 22. Middle spiral part; 221. First outer arc edge; 2211. First smooth part; 2212. Second smooth part; 2213. First curved part; 222. First inner arc edge; 23. Tail fin; 231. Thickened part; 232. Blade tip. Detailed Implementation

[0026] The technology of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0029] Please see Figures 1 to 5 An embodiment of the present invention provides a structurally optimized fan blade, including a hub 1 and a plurality of blades 2 arranged around the hub 1;

[0030] The hub 1 is mainly used to mount the blades 2 and the shaft of the external motor. Specifically, a mounting hole 11 is provided through the axis of the hub 1, such as... Figure 1The hub 1 shown has a first mounting surface 12 and a second mounting surface 13 on both sides. To facilitate linkage with the motor shaft, the hub 1 in this embodiment includes a bushing 14 extending outward from the second mounting surface 13. The mounting hole 11 passes through the bushing 14. A connecting groove 15 for snap-fit ​​is provided on the bushing 14. During assembly, the output shaft of the motor is directly inserted into the mounting hole 11, and the output shaft is locked by the locking pin and the connecting groove 15, realizing the linkage between this utility model and the fan motor. A reinforcing rib group 16 is connected to the outer side of the bushing 14. The reinforcing rib group 16 is provided along the outer surface of the bushing 14 and extends to the inner wall of the hub 1. Thus, the design of the reinforcing rib group 16 significantly enhances the structural strength, rigidity, torsional performance and stability, and improves the overall performance and reliability.

[0031] In this embodiment, a total of 7 blades 2 are provided. Each blade 2 includes an integrally formed front end portion 21, a central spiral portion 22, and a tail fin 23. The front end portion 21 is inclined and connected to the side edge of the hub 1, i.e. Figure 1 As shown, the angle between the tangent of the projection of the front end 21 to the hub 1 onto the plane containing the hub 1 axis and the hub 1 axis is 45°. This allows each blade 2 to be evenly distributed on the side of the hub 1 with the same tilt angle. The arrangement of 7 blades provides sufficient airflow and air pressure while maintaining high aerodynamic efficiency. In particular, in this embodiment, the front end 21 forms a first concave arc-shaped structure that is recessed into the second mounting surface 13. This allows the airflow to enter the front end 21 along the outer peripheral surface of the hub 1 when the fan blades rotate, and then enter the central swirl section 22 more smoothly along the first concave arc-shaped structure, forming a highly efficient airflow channel.

[0032] The central spiral portion 22 is spirally arranged outward from the front end portion 21 in a clockwise direction, causing the end of the tail fin 23 to fold back towards the first mounting surface 12. The horizontal projection of the central spiral portion 22 is higher than the front and rear side edges of the front end portion 21, such as... Figure 2As shown, the end of the tail fin 23 is an arc-shaped blade tip 232, which can slightly tilt upwards towards the first mounting surface 12. This reduces the overall force-bearing area of ​​the blade when it rotates, thereby reducing the wind resistance of the entire blade 2 during rotation and achieving a better noise reduction effect. Furthermore, the two sides of the central spiral portion 22 respectively form a first outer arc edge 221 and a first inner arc edge 222. The curvature of the first inner arc edge 222 is greater than the average curvature of the first outer arc edge 221. Preferably, the first outer arc edge 221 includes sequentially connected... The first smooth portion 2211, the second smooth portion 2212, and the first curved portion 2213 have the following characteristics: the curvature of the first smooth portion 2211 is smaller than that of the first curved portion 2213, and the curvature of the second smooth portion 2212 is smaller than that of the first smooth portion 2211. Preferably, the ratio of the curvature of the second smooth portion 2212 to the curvature of the first curved portion 2213 is 1:3 to 1:3.5, and the ratio of the curvature of the second smooth portion 2212 to the curvature of the first smooth portion 2211 is 1:1.4 to 1:1.5. Figure 5 As shown, the combined design of the first smoothing section 2211, the second smoothing section 2212, and the first curved section 2213 allows the airflow to gradually and smoothly transition as it passes over the fan blades, reducing airflow turbulence and noise generation. The first smoothing section 2211 has a smaller curvature, which allows part of the airflow to be diverted to the second smoothing section 2212; the curvature of the second smoothing section 2212 is further reduced, allowing the airflow to form a relatively flat outlet channel in the middle stage; the first curved section 2213 has a larger curvature, which not only allows the tail fin 23 to form the final reverse fold, but also diverts the airflow input to the tail fin 23 to the second smoothing section 2212, thereby forming a good airflow acceleration channel, thereby improving wind power output, while reducing airflow turbulence, thus achieving a better noise reduction effect.

[0033] As a preferred embodiment, a thickened portion 231 is provided on the middle back side of the tail fin 23. The thickened portion 231 and the two ends of the tail fin 23 form an arc-shaped structure protruding towards the second mounting surface 13. The thickened portion 231 improves the rigidity of the tail fin 23, making it less prone to deformation or damage under high-speed or high-load conditions. The arc-shaped structure formed by the thickened portion 231 and the two ends of the tail fin 23 towards the second mounting surface 13 helps to optimize airflow, reduce drag, and increase wind power.

[0034] As a preferred option, such as Figure 4As shown, in this embodiment, the included angle between the tangents of the two arc-shaped structures on both sides of the blade tip 232 is α1. The angle of α1 ranges from 50° to 55°. For example, the angle of α1 can be 50°, 51°, 52°, 54°, or 55°, etc., with 53° being a preferred setting. By designing the end of the tail fin 23 as an arc-shaped blade tip 232, the aerodynamic performance of the fan blade is optimized. The design of the arc-shaped blade tip 232 helps to reduce air resistance, improve the working efficiency of the fan, and thus achieve a higher air volume output. At the same time, the included angle range in this embodiment can effectively reduce the noise generated when the fan blade rotates, improving the quietness of the fan.

[0035] As a preferred option, such as Figure 4 As shown, in this embodiment, the line connecting the midpoint A of the horizontal projection of the connection between the front end 21 and the hub 1 and the center point C of the hub 1 is L1. The line connecting the tangent point Q1 of the blade tip 232 and the center point C of the hub 1 is L2. The included angle between L1 and L2 is α2, and the angle range of α2 is 30°~35°. For example, the angle of α1 can be 30°, 31°, 31.5°, 32°, 34° or 35°, etc., with 33° being a preferred setting. Specifically, the design of the arc-shaped blade tip 232 can be achieved in various ways. For example, a mold forming process can be used to precisely control the blade tip 232 part during the manufacturing process to ensure that its shape and included angle meet the design requirements. In addition, CNC machining technology can be used to finely process the blade tip 232 part to further improve the accuracy and consistency of the blade tip 232.

[0036] Through the above design, this application significantly reduces the fan noise level while maintaining a high airflow, meeting users' needs for quiet and efficient fans. Compared with the prior art, this application provides a structurally optimized fan blade design with better aerodynamic performance and quieter operation, solving the problem of balancing airflow and noise in the prior art.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fan blade with optimized structure, characterized in that, Includes a hub (1) and multiple blades (2) arranged around the hub (1); A mounting hole (11) is provided through the axis of the hub (1), and the two sides of the hub (1) are the first mounting surface (12) and the second mounting surface (13), respectively. Each blade (2) includes an integrally formed front end (21), a central spiral portion (22), and a tail fin (23). The front end (21) is inclined to connect with the side edge of the hub (1). The front end (21) forms a first concave arc-shaped structure recessed towards the second mounting surface (13). The central spiral portion (22) is spirally arranged outward from the front end (21) in a clockwise direction, so that the end of the tail fin (23) is folded back towards the first mounting surface (12). The horizontal projection of the central spiral portion (22) is higher than the front and rear side edges of the front end (21). The two side edges of the central spiral portion (22) respectively form a first outer arc edge (221) and a first inner arc edge (222). The curvature of the first inner arc edge (222) is greater than the average curvature of the first outer arc edge (221).

2. The optimized fan blade according to claim 1, characterized in that, A thickened portion (231) is provided on the middle back side of the tail fin (23), and the thickened portion (231) and the two ends of the tail fin (23) form an arc-shaped structure that protrudes toward the second mounting surface (13).

3. The optimized fan blade according to claim 1, characterized in that, The end of the tail fin (23) is an arc-shaped blade tip (232), and the angle between the tangents of the arc structures on both sides of the blade tip (232) is α1, with the angle range of α1 being 50°~55°.

4. The optimized fan blade according to claim 3, characterized in that, The line connecting the midpoint A of the connection between the front end (21) and the hub (1) in the horizontal projection and the center point C of the hub (1) is L1, the line connecting the tangent point Q1 of the blade tip (232) and the center point C of the hub (1) is L2, the included angle between L1 and L2 is α2, and the angle range of α2 is 30°~35°.

5. The optimized fan blade according to claim 1, characterized in that, The first outer arc edge (221) includes a first smooth portion (2211), a second smooth portion (2212), and a first curved portion (2213) connected in sequence. The arc of the first smooth portion (2211) is smaller than the arc of the first curved portion (2213), and the arc of the second smooth portion (2212) is smaller than the arc of the first smooth portion (2211).

6. The optimized fan blade according to claim 5, characterized in that, The ratio of the curvature of the second smooth portion (2212) to the curvature of the first curved portion (2213) is 1:3 to 1:3.5, and the ratio of the curvature of the second smooth portion (2212) to the curvature of the first smooth portion (2211) is 1:1.4 to 1:1.

5.

7. The optimized fan blade according to claim 1, characterized in that, The hub (1) includes a bushing (14) extending toward the second mounting surface (13), through which the mounting hole (11) passes, and a connecting groove (15) for snap-fit ​​is provided on the bushing (14).

8. The optimized fan blade according to claim 7, characterized in that, The bushing (14) is connected to a reinforcing rib group (16) arranged around it. The reinforcing rib group (16) is arranged along the outer surface of the bushing (14) and extends to the inner wall of the hub (1).

9. The optimized fan blade according to claim 1, characterized in that, The number of blades (2) is 7.

10. The optimized fan blade according to claim 1, characterized in that, The angle between the tangent of the projection of the connection point of the front end (21) and the hub (1) on the plane containing the axis of the hub (1) and the axis of the hub (1) is 45°.

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