A novel fan blade structure and fan

Abstract

This utility model discloses a novel fan blade structure and a fan. The novel fan blade structure includes: a hub with multiple spaced mounting portions around its periphery; and multiple fan blades, each fan blade being mounted on a mounting portion of the hub. Each fan blade has an air inlet side and an air outlet side opposite to the air inlet side. The fan blade has a first surface near the air inlet side, and the first surface has a first airflow groove. The first airflow groove obliquely penetrates a first side and a second side of the fan blade, with the first and second sides facing each other. The thickness of the first side of the fan blade is greater than the thickness of the second side. The width of the opening of the first airflow groove gradually widens, narrows, or becomes unequal along the rotation direction of the fan blade. The technical solution of this utility model, by providing a first airflow groove on the surface of the fan blade, can guide the airflow on the fan blade surface, reducing the influence of eddies and turbulence on the fan blade surface, thereby increasing the airflow velocity on the fan blade surface and having the advantage of increasing the airflow volume.

Description

Technical Field

[0001] This utility model relates to a fan, and more particularly to a novel fan blade structure and fan. Background Technology

[0002] Currently, fan structures are divided into bladed fans and bladeless fans. Bladed fans use a motor to drive the blades to rotate clockwise. As the blades rotate, their surfaces continuously cut and compress the air, causing it to enter from the intake side and exit through the gaps between the blades from the exhaust side, creating a directional airflow for ventilation or heat dissipation. When the blades compress the air, the uneven contact between air molecules and the blade surface causes these molecules to experience varying forces, resulting in different flow velocities. This can easily generate eddies or turbulence on the blade surface, affecting the airflow speed.

[0003] In view of this, it is necessary to propose further improvements to the current structure of fan blades. Utility Model Content

[0004] To solve at least one of the above-mentioned technical problems, the main objective of this utility model is to provide a novel fan blade structure and fan.

[0005] To achieve the above objectives, the present invention provides a novel fan blade structure, comprising:

[0006] A wheel hub, wherein the circumference of the wheel hub has a plurality of spaced mounting portions;

[0007] Multiple fan blades, each fan blade being mounted on a hub mounting portion, each fan blade having an air inlet side and an air outlet side opposite to the air inlet side, each fan blade having a first surface near the air inlet side, the first surface having a first airflow groove, the first airflow groove obliquely penetrating through a first side and a second side of the fan blade, the first side and the second side being opposite to each other, and the thickness of the first side of the fan blade being greater than the thickness of the second side.

[0008] The width of the opening of the first airflow groove is gradually widened, gradually narrowed, or unequal along the rotation direction of the fan blade.

[0009] The fan blade has a second surface near the air outlet side, and the second surface has a second airflow groove. The second airflow groove obliquely penetrates the first side and the second side of the fan blade, and the width of the groove opening is gradually widened, gradually narrowed or unequal along the rotation direction of the fan blade.

[0010] The first airflow groove and the second airflow groove each include a first groove wall, a second groove wall and a bottom wall. The two sides of the bottom wall are respectively connected to the first groove wall and the second groove wall to form the first airflow groove or the second airflow groove. The first groove wall and / or the second groove wall are convex arc surfaces.

[0011] The surface of the bottom wall is a convex arc shape.

[0012] The first airflow groove and the second airflow groove are connected at the first and second sides of the fan blade.

[0013] Wherein, the first surface of the fan blade has a plurality of spaced-apart first airflow grooves, and / or,

[0014] The second surface of the fan blade has a plurality of spaced-apart second airflow grooves.

[0015] The first airflow channel is divided into multiple segments, with adjacent segments connected to each other, and / or...

[0016] The second airflow channel is divided into multiple channel segments, with adjacent channel segments connected to each other.

[0017] Wherein, the width of the opening of the first airflow groove is greater than the depth of the opening, and / or,

[0018] The width of the second airflow channel is greater than its depth.

[0019] The fan blades consist of 9-11 blades.

[0020] To achieve the above objectives, another technical solution adopted by this utility model is to provide a fan, including the novel fan blade structure described above.

[0021] The technical solution of this utility model mainly includes a hub and multiple fan blades disposed on the hub. By setting a first airflow groove on the first surface of the fan blades, the air on the fan blade surface can be guided, reducing eddies and turbulence of air molecules. In addition, the width of the groove opening is set to gradually widen, narrow, or be unequal along the rotation direction of the fan blade, which can reduce the generation of eddies and turbulence and facilitate the rapid discharge of airflow. Furthermore, setting the first airflow groove on the fan blade reduces the mass of the fan blade itself. Under the condition of the same motor or electric motor output efficiency, the fan blade of this solution has a faster rotation speed and a correspondingly larger air volume. The technical solution of this utility model, by setting a first airflow groove on the surface of the fan blade, can guide the airflow on the surface of the fan blade, reduce the influence of eddies and turbulence on the surface of the fan blade, thereby increasing the airflow velocity on the surface of the fan blade and having the advantage of large air volume. Attached Figure Description

[0022] To more clearly illustrate the technical solutions 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the air outlet side of a novel fan blade structure according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the air inlet side of a novel fan blade structure according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the air inlet side of a novel fan blade structure according to an embodiment of the present invention.

[0026] Figure 4 This is a cross-sectional view of the air inlet side of a novel fan blade structure according to an embodiment of the present invention.

[0027] Figure 5 for Figure 4 A magnified structural diagram of point A in the middle.

[0028] Label Explanation:

[0029] 100. Wheel hub;

[0030] 200. Fan blades:

[0031] 201. Air outlet side; 202. Air inlet side; 210. Second airflow channel; 220. First airflow channel; 221. First channel wall; 222. Second channel wall; 223. Bottom wall; 230. Second surface; 240. First surface; 250. First side; 260. Second side.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that the descriptions involving "first," "second," etc., in this utility model 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. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0035] Unlike existing technologies where air molecules experience uneven forces due to varying contact points with the blade surface during air compression, leading to different flow velocities and the generation of eddies or turbulence on the blade surface that affect airflow velocity, this invention provides a novel fan blade structure. By designing grooves on the fan blade surface, it reduces eddies and turbulence, increasing gas flow velocity. The specific structure of this novel fan blade is described in the following embodiment.

[0036] Please refer to Figures 1 to 5 , Figure 1 This is a schematic diagram of the air outlet side of a novel fan blade structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the air inlet side of a novel fan blade structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the air inlet side of a novel fan blade structure according to an embodiment of the present invention.

[0037] Figure 4 This is a cross-sectional view of the air inlet side of a novel fan blade structure according to an embodiment of the present invention. Figure 5 for Figure 4 An enlarged structural diagram at point A. In this embodiment of the invention, the novel fan blade structure includes:

[0038] The hub 100 has multiple spaced mounting portions around its periphery. These mounting portions are evenly distributed and form a ring. Each mounting portion can be a mounting groove into which the fan blades can be directly inserted, facilitating the installation of detachable fan blades. When installing the fan blades, the hub 100 is located at the center of the fan blades. The hub 100 also has an assembly portion through which it can be mounted onto a fan.

[0039] Multiple fan blades 200 are provided, each fan blade 200 being mounted on the mounting portion of the hub 100. Each fan blade 200 has an air inlet side 202 and an air outlet side 201 opposite to the air inlet side 202. Near the air inlet side 202, each fan blade 200 has a first surface 240 with a first airflow groove 220. The first airflow groove 220 obliquely penetrates a first side 250 and a second side 260 of the fan blade 200. The first side 250 and the second side 260 are opposite to each other, and the thickness of the first side 250 is greater than the thickness of the second side 260. The first side 250 is located near the front end of the fan blade 200, and the second side 260 is located near the rear end or tail end of the fan blade 200. Each fan blade 200 is arc-shaped, and the multiple fan blades 200 can be integrally formed with the hub 100. The first surface 240 and the second surface 230 of the fan blade 200 are arranged opposite to each other. The first surface 240 is a convex arc surface, and the second surface 230 is a concave arc surface. The first surface 240 has a first airflow groove 220, which can guide the airflow, reduce eddies and turbulence on the surface of the fan blade 200, and also reduce the weight of the fan blade 200 itself. Under the condition of a fixed driving power of the motor, it can have a higher rotation speed and improve the air volume of the fan blade 200. The first airflow groove 220 is set at an angle, which can increase the length of the groove and is more conducive to airflow guidance. Understandably, the first airflow groove 220 can also be set directly in the middle of the fan blade 200, with the two ends of the first airflow groove 220 having an inlet and outlet angled design. This solution is also a feasible solution, but the airflow guiding effect is poor. The first airflow groove 220 penetrates the first side 250 and the second side 260 of the fan blade 200, which is more conducive to the smooth passage of airflow through the first airflow groove 220 and reduces the obstruction of the groove wall of the first airflow groove 220 to the airflow.

[0040] The width of the opening of the first airflow groove 220 is gradually widening, gradually narrowing, or unequal along the rotation direction of the fan blade 200. Specifically, by setting the opening width of the first airflow groove 220, when the opening width is unequal, the airflow can be guided, reducing eddies and turbulence; when the opening width of the first airflow groove 220 is gradually widening, the airflow exiting the first airflow groove 220 is in a consistent direction, further reducing eddies and turbulence; when the opening width of the first airflow groove 220 is gradually narrowing, the airflow exiting the first airflow groove 220 is more concentrated and in a consistent direction, further reducing eddies and turbulence. This helps to increase the airflow velocity at the fan blade 200, thereby increasing the airflow volume of the fan blade 200.

[0041] In one specific embodiment, the fan blade 200 has a second surface 230 near the air outlet side 201. The second surface 230 has a second airflow groove 210, which obliquely penetrates the first side 250 and the second side 260 of the fan blade 200. The width of the groove opening of the second airflow groove 210 gradually widens, narrows, or is unequal along the rotation direction of the fan blade 200. The fan blade 200 typically rotates clockwise. Correspondingly, the width of the groove openings of the first airflow groove 220 and the second airflow groove 210 decreases from wide to narrow, from narrow to wide, or is unequal along the clockwise direction. Considering the possibility of counterclockwise rotation of the fan blade 200, the openings of the first airflow groove 220 and the second airflow groove 210 can be set to decrease from wide to narrow, from narrow to wide, or are unequal along the counterclockwise direction. It is understood that, in order to facilitate the airflow through the first airflow groove 220 and the second airflow groove 210, their narrowest point should not be designed to be too narrow, which would affect the discharge of the guiding airflow. By configuring the first airflow groove 220 and the second airflow groove 210, the entire surface of the fan blade 200 can guide the airflow, reducing the obstruction of effective airflow by eddies and turbulence, allowing the airflow to pass more smoothly across the entire surface of the fan blade 200, thereby increasing the airflow velocity and improving the output air volume. The first airflow groove 220 and the second airflow groove 210 are symmetrically positioned, facilitating the overall processing of the fan blade 200. Of course, the positions of the first airflow groove 220 and the second airflow groove 210 can also be staggered. In addition, since each fan blade 200 is provided with the first airflow groove 220 and the second airflow groove 210, the first airflow groove 220 and the second airflow groove 210 of each fan blade 200 form a ring on the entire fan blade 200, giving the fan blade 200 a better appearance whether it is stationary or rotating. Furthermore, to further enhance the appearance of the fan blade 200, the first airflow groove 220 and the second airflow groove 210 can be printed with specific patterns, text, or color bands.

[0042] Regarding the specific structure of the airflow channels, both the first airflow channel 220 and the second airflow channel 210 include a first channel wall 221, a second channel wall 222, and a bottom wall 223. The two sides of the bottom wall 223 are connected to the first channel wall 221 and the second channel wall 222, respectively, to form the first airflow channel 220 or the second airflow channel 210. The first channel wall 221 and / or the second channel wall 222 are convex arc-shaped surfaces. Since the first airflow channel 220 penetrates both sides of the first surface 240 of the fan blade 200, and the second airflow channel 210 penetrates both sides of the second surface 230 of the fan blade 200, both the first airflow channel 220 and the second airflow channel are enclosed by three walls. The first channel wall 221 is a convex arc surface, or the second channel wall 222 is a convex arc surface, or both the first channel wall 221 and the second channel wall 222 are convex arc surfaces. When air molecules collide with the first channel wall 221 and the second channel wall 222, the forces on the air molecules in different directions are increased. Furthermore, the air molecules lose less energy due to the guidance of the first channel wall 221 and the second channel wall 222. Correspondingly, the surface of the bottom wall 223 is a convex arc surface. This convex arc surface design of the bottom wall 223 also reduces the energy loss from collisions between air molecules and the bottom wall 223, as the airflow flows smoothly out of the first airflow channel 220 and the second airflow channel 210.

[0043] In one specific embodiment, the first airflow groove 220 and the second airflow groove 210 are connected at the first side 250 and the second side 260 of the fan blade 200. The corresponding positions of the first airflow groove 220 and the second airflow groove 210 facilitate processing. The connection between the first airflow groove 220 and the second airflow groove 210 at the first side 250 and the second side 260 of the fan blade 200 facilitates smooth airflow. Because the first airflow groove 220 and the second airflow groove 210 are connected, a notch is formed at the edge of the overall fan blade 200.

[0044] To ensure a more uniform airflow across the surface of the fan blade 200, the first surface 240 of the fan blade 200 has a plurality of spaced-apart first airflow grooves 220, and / or,

[0045] The second surface 230 of the fan blade 200 has multiple spaced-apart second airflow grooves 210. In this design, the first surface 240 of the fan blade 200 is provided with three first airflow grooves 220, and the second surface 230 of the fan blade 200 is also provided with three second airflow grooves 210. By providing three first airflow grooves 220 and two airflow grooves 210, the airflow on the surface of the fan blade 200 passes through the fan blade 200 more smoothly, reducing the influence of eddies and turbulence. It is understood that the three first airflow grooves 220 and two airflow grooves 210 are not a limitation of this design. In actual design, the number of first airflow grooves 220 and second airflow grooves 210 can be flexibly set according to the distance from the free end of the fan blade 200 to the hub 100 and the width of the first airflow grooves 220 and second airflow grooves 210 of the fan blade 200. There is no limitation here.

[0046] In one specific embodiment, the first airflow channel 220 is divided into multiple channel segments, adjacent channel segments are connected to each other, and / or

[0047] The second airflow channel 210 is divided into multiple segments, with adjacent segments connected to each other. The first airflow channel 220 and the second airflow channel 210 are arc-shaped channels, or they can be multi-segment channels. When the first airflow channel 220 and the second airflow channel 210 are multi-segment channels, the corners between adjacent segments can be rounded to reduce obstruction to air molecules. After the multi-segment channels are connected, the entire first airflow channel 220 and the second airflow channel 210 have a similar arc-shaped arrangement.

[0048] In one specific embodiment, the width of the opening of the first airflow slot 220 is greater than the depth of the opening, and / or,

[0049] The width of the opening of the second airflow groove 210 is greater than its depth. Considering that in actual design, the thickness of the fan blade 200 is much smaller than the distance between the first side 250 and the second side 260 of the fan blade 200, the width of the opening of the first airflow groove 220 and the second airflow groove 210 is much greater than their depth.

[0050] In this design, the fan blade 200 is configured with multiple blades, specifically 9-11 blades. Multiple blades allow for more even airflow during intake and exhaust, resulting in a gentler exhaust. It is understood that the number of blades 200 is not limited to 9-11; other numbers are also possible.

[0051] In the embodiments of this utility model, the fan includes the novel fan blade structure described above. The specific structure of this novel fan blade structure is described in the above embodiments and will not be repeated here. Since the fan of this solution adopts all the technical solutions of all embodiments of the novel fan blade structure described above, it possesses at least all the advantages and beneficial effects brought about by the technical solutions of the above embodiments of the novel fan blade structure, which will not be repeated here.

[0052] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the technical concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A novel fan blade structure, characterized by, The novel fan blade structure includes: A wheel hub, wherein the circumference of the wheel hub has a plurality of spaced mounting portions; Multiple fan blades, each fan blade being mounted on a hub mounting portion, each fan blade having an air inlet side and an air outlet side opposite to the air inlet side, each fan blade having a first surface near the air inlet side, the first surface having a first airflow groove, the first airflow groove obliquely penetrating through a first side and a second side of the fan blade, the first side and the second side being opposite to each other, and the thickness of the first side of the fan blade being greater than the thickness of the second side. The width of the opening of the first airflow groove is gradually widened, gradually narrowed, or unequal along the rotation direction of the fan blade.

2. The novel fan blade structure as described in claim 1, characterized in that, The fan blade has a second surface near the air outlet side, and the second surface has a second airflow groove. The second airflow groove obliquely penetrates the first side and the second side of the fan blade, and the width of the groove opening is gradually widened, gradually narrowed or unequal along the rotation direction of the fan blade.

3. The novel fan blade structure as described in claim 2, characterized in that, Both the first airflow channel and the second airflow channel include a first channel wall, a second channel wall and a bottom wall. The two sides of the bottom wall are respectively connected to the first channel wall and the second channel wall to form the first airflow channel or the second airflow channel. The first channel wall and / or the second channel wall are convex arc surfaces.

4. The novel fan blade structure as described in claim 3, characterized in that, The surface of the bottom wall is a convex arc shape.

5. The novel fan blade structure as described in claim 2, characterized in that, The first airflow groove and the second airflow groove are connected at the first and second sides of the fan blade.

6. The novel fan blade structure as described in claim 2, characterized in that, The first surface of the fan blade has a plurality of spaced-apart first airflow grooves, and / or, The second surface of the fan blade has a plurality of spaced-apart second airflow grooves.

7. The novel fan blade structure as described in claim 2, characterized in that, The first airflow channel is divided into multiple segments, adjacent segments are connected to each other, and / or The second airflow channel is divided into multiple channel segments, with adjacent channel segments connected to each other.

8. The novel fan blade structure as described in claim 2, characterized in that, The width of the opening of the first airflow slot is greater than the depth of the opening, and / or, The width of the second airflow channel is greater than its depth.

9. The novel fan blade structure as described in claim 2, characterized in that, The fan blades consist of 9-11 blades.

10. A fan, characterized in that, The fan includes the novel fan blade structure as described in any one of claims 1 to 9.

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