Fan, screen cover assembly, and front screen cover

Abstract

The application relates to a fan, a mesh cover assembly and a front mesh cover. The fan comprises a fan blade and the mesh cover assembly, the mesh cover assembly comprises a front mesh cover and a rear mesh cover, and the front mesh cover comprises a first cover body and a second cover body. The rear mesh cover is connected with the front mesh cover, and the fan blade is arranged in a containing space surrounded by the front mesh cover and the rear mesh cover. Since the second cover body of the front mesh cover is sleeved on the outer circumferential side of the first cover body, and the outer windward surface of the second cover body is arranged in a direction away from the first cover body and inclined to the air outlet direction of the fan blade, the wind blown out by the outer windward surface through the second cover body can be further diffused outward by utilizing the wall attachment effect of the wind in the blowing process, so that the air supply range can be increased, and the air supply volume can be ensured.

Description

Technical Field

[0001] This invention relates to the field of fan structure technology, and in particular to fans, grille assemblies, and front grilles. Background Technology

[0002] A fan mainly consists of a front grille, a rear grille, blades, and a motor. The motor drives the blades to rotate within the space enclosed by the front and rear grilles, generating a high-speed airflow that propels the air forward. The front grille not only protects the blades but also guides the airflow. However, traditional front grilles are typically made of plastic, which offers greater air resistance, thus affecting the airflow volume. Summary of the Invention

[0003] This invention addresses the problem of low airflow by proposing a fan, a mesh assembly, and a front mesh cover, which can achieve the technical effect of ensuring airflow.

[0004] A front mesh cover includes a first cover and a second cover. The second cover is fitted onto the outer periphery of the first cover. The surface of the second cover facing the fan blade is the outer windward surface, and the outer windward surface is inclined towards the air outlet direction of the fan blade along a direction away from the first cover.

[0005] In one embodiment, the surface of the first cover facing the fan blade is an inner windward surface, which is inclined towards the air outlet direction of the fan blade along the rotation axis of the fan blade.

[0006] In one embodiment, the angle between the inner windward surface and the plane perpendicular to the axis of rotation is greater than or equal to 0° and less than 15°.

[0007] In one embodiment, the first cover includes a plurality of first grid strips, each of which is an arc-shaped strip. The plurality of first grid strips are spaced apart around the rotation axis of the fan blade. The concave surface of each first grid strip faces away from the rotation direction of the fan blade, and along the air outlet direction of the fan blade, the first grid strips are inclined away from the rotation direction of the fan blade; or

[0008] The first cover includes a plurality of first grid bars, each of which is a straight bar. The plurality of first grid bars are spaced apart around the rotation axis of the fan blade and are inclined away from the rotation direction of the fan blade along the air outlet direction of the fan blade.

[0009] In one embodiment, the thickness of the first grid bar in the direction of rotation of the fan blade gradually increases towards the direction of air outlet of the fan blade.

[0010] In one embodiment, the angle between the surface of the first grid bar facing away from the direction of rotation of the fan blade and the axis of rotation is 5° to 25°.

[0011] In one embodiment, the angle between the outer windward surface and the plane perpendicular to the axis of rotation is greater than 0° and less than 15°.

[0012] In one embodiment, the second cover includes a plurality of second grid strips, the second grid strips being arc-shaped strips, the plurality of second grid strips being spaced apart around the rotation axis of the fan blade and located on the outer periphery of the first cover, the concave surface of the second grid strips facing the rotation direction of the fan blade.

[0013] In one embodiment, along the air outlet direction of the fan blade, the concave surface of the second grid bar is inclined toward the rotation direction of the fan blade.

[0014] In one embodiment, the thickness of the second grid bar in the rotation direction of the fan blade gradually increases towards the air outlet direction of the fan blade.

[0015] In one embodiment, the angle between the concave surface of the second grid bar and the rotation axis is 10° to 30°.

[0016] In one embodiment, the thickness of the first cover along the air outlet direction of the fan blade is 3mm to 10mm; and / or

[0017] The thickness of the second cover along the air outlet direction of the fan blade is greater than 3mm and less than or equal to 10mm.

[0018] A mesh cover assembly includes a front mesh cover and a rear mesh cover as described above, wherein the rear mesh cover is connected to one side of the outer windward side of the front mesh cover, and the rear mesh cover and the front mesh cover form a receiving space for mounting a fan blade.

[0019] A fan includes blades and a mesh assembly as described above, the blades being disposed within the receiving space such that the outer windward surface faces the blades.

[0020] In use, the aforementioned fan, grille assembly, and front grille are connected to the outer windward side of the front grille, with the fan blades positioned within the receiving space enclosed by the front and rear grilles. The second cover of the front grille is fitted around the outer periphery of the first cover, and the outer windward surface of the second cover is inclined towards the airflow direction of the fan blades, away from the first cover. Utilizing the wall adhesion effect during airflow, the airflow from the outer windward surface through the second cover can be further diffused outwards, thereby increasing the airflow range and ensuring sufficient airflow volume. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0024] Figure 1 This is a front view of the fan in one embodiment;

[0025] Figure 2 for Figure 1 Cross-sectional view of the front mesh cover;

[0026] Figure 3 for Figure 2 A partial enlarged sectional view of the front grille shown;

[0027] Figure 4 for Figure 1 A partial structural diagram of the first enclosure.

[0028] Figure 5 for Figure 4 A partial cross-sectional view of the first enclosure shown;

[0029] Figure 6 This is a front view of the front mesh cover in another embodiment;

[0030] Figure 7 for Figure 1 A partial structural diagram of the second enclosure;

[0031] Figure 8 for Figure 7 A partial sectional view of the second enclosure shown;

[0032] Figure 9 This is a schematic diagram of the structure of the rear mesh cover in one embodiment;

[0033] Figure 10 for Figure 9 Enlarged view of point A in the middle;

[0034] Figure 11 for Figure 9 Enlarged view of point B in the middle;

[0035] Figure 12 This is a schematic diagram of the front mesh cover in one embodiment;

[0036] Figure 13 for Figure 12 Enlarged view of point C in the middle;

[0037] Figure 14 for Figure 12 Enlarged view of point D in the middle;

[0038] Figure 15 This is an exploded view of the rear mesh cover and mounting components in one embodiment.

[0039] Explanation of reference numerals in the attached figures:

[0040] 10. Fan; 100. Fan blade; 200. Front grille; 210. First cover; 211. Inner air-facing surface; 212. First grille; 213. First connecting ring; 214. Intermediate ring; 220. Second cover; 221. Outer air-facing surface; 222. Second grille; 223. Second connecting ring; 230. Limiting part; 231. Limiting groove; 240. Second mating part; 260. Second connecting hole; 270. Guide section; 300, rear net cover; 310, rear net body; 320, first mating part; 330, locking part; 340, first connecting hole; 350, guide groove; 360, support part; 370, mounting hole; 380, slot; 390, second limiting structure; 400, mounting part; 410, first mounting part; 420, second mounting part; 422, drive hole; 430, hook; 440, first limiting structure. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] See Figure 1 In one embodiment of the present invention, the fan 10 includes a fan blade 100 and a grille assembly. The fan blade 100 is disposed within the grille assembly and is capable of rotating within the grille assembly. Specifically, the grille assembly includes a front grille 200 and a rear grille 300 (e.g., ...). Figure 9 As shown), the rear net cover 300 is connected to the front net cover 200, and the rear net cover 300 and the front net cover 200 form a receiving space. The fan blade 100 is installed in the receiving space and can rotate in the receiving space.

[0043] See Figures 1 to 3 In one embodiment, the front grille 200 includes a first cover 210 and a second cover 220. The second cover 220 is fitted onto the outer periphery of the first cover 210. The surface of the second cover 220 facing the fan blade 100 is an outer windward surface 221, and the outer windward surface 221 is inclined towards the air outlet direction a of the fan blade 100 along a direction away from the first cover 210. Specifically, the rear grille 300 is connected to one side of the outer windward surface 221 of the front grille 200, and the outer windward surface 221 is positioned facing the fan blade 100.

[0044] In use, the aforementioned fan 10, mesh assembly, and front mesh 200 are connected to the front mesh 200 via the rear mesh 300, and the fan blades 100 are positioned within the receiving space enclosed by the front and rear mesh 200. Since the second cover 220 of the front mesh 200 is fitted around the outer periphery of the first cover 210, and the outer windward surface 221 of the second cover 220 is inclined towards the air outlet direction a of the fan blades 100 along a direction away from the first cover 210, the wall adhesion effect during the airflow process allows the airflow blown out through the second cover 220 via the outer windward surface 221 to further diffuse outward, thereby increasing the airflow range and ensuring sufficient airflow volume.

[0045] Specifically, the angle θ1 between the outer windward surface 221 and the plane perpendicular to the rotation axis b of the fan blade 100 is greater than 0° and less than 15°. By controlling the tilt angle θ1 of the outer windward surface 221, the air-expanding effect of the outer windward surface 221 can be further guaranteed, and the excessively large angle θ1 can be avoided, which would cause the distance between the outer windward surface 221 and the fan blade 100 to be too large, thus affecting the air output effect. For example, the angle θ1 between the outer windward surface 221 and the plane perpendicular to the rotation axis b is 5°, 10°, or 15°. Alternatively, the angle θ1 between the outer windward surface 221 and the plane perpendicular to the rotation axis b can also be less than 10°.

[0046] In one embodiment, the surface of the first cover 210 facing the fan blade 100 is an inner windward surface 211. The inner windward surface 211 is inclined towards the air outlet direction a of the fan blade 100 along the rotation axis b of the fan blade 100. Utilizing the wall adhesion effect during the blowing process, the air blown out by the inner windward surface 211 can be concentrated inward, thereby ensuring the wind speed of the air outlet from the first cover 210 to ensure a good frontal airflow. At the same time, in conjunction with the second cover 220, the airflow in the middle is of higher speed and stronger feel, while the airflow on the outer periphery of the second cover 220 is of higher volume and has a larger air delivery range.

[0047] Specifically, the angle θ2 between the inner windward surface 211 and the plane perpendicular to the rotation axis b is greater than or equal to 0° and less than 15°. When the angle θ2 between the inner windward surface 211 and the plane perpendicular to the rotation axis b is 0°, the air generated by the fan blade 100 can be blown directly out by the first cover 210. If the angle θ2 between the inner windward surface 211 and the plane perpendicular to the rotation axis b is set to be greater than 0°, the air that has been appropriately gathered by the inner windward surface 211 can be delivered out by the first cover 210. For example, the angle θ2 between the inner windward surface 211 and the plane perpendicular to the rotation axis b is 5°, 10°, or 15°. Alternatively, the angle θ2 between the inner windward surface 211 and the plane perpendicular to the rotation axis b can also be less than 10°.

[0048] See Figure 1 and Figure 4 In one embodiment, the first cover 210 includes a plurality of first grid strips 212, each of which is an arc-shaped strip. The plurality of first grid strips 212 are spaced apart around the rotation axis b of the fan blade 100, and the concave surface of the first grid strips 212 is positioned opposite to the rotation direction c of the fan blade 100. Since the fan blade 100 generates wind by rotating around the rotation axis b, when the wind passes through the first cover 210, it will be blown out along the first grid strips 212 under the guiding effect of the first grid strips 212, thereby forming a direct or near-direct wind along the rotation axis b of the fan blade 100 in the area corresponding to the first cover 210, resulting in a strong frontal wind sensation.

[0049] See Figure 5 Specifically, along the air outlet direction a of the fan blade 100, the first grid strip 212 is inclined away from the rotation direction c of the fan blade 100. Since the first grid strip 212 is an arc-shaped strip, the air blown out from between the first grid strips 212 can approach a direct airflow. By inclining the first grid strip 212 away from the rotation direction c of the fan blade 100, the air blowing out along the surface of the first grid strip 212 can appropriately diffuse outwards and merge with the air blown out by the second cover 220. This not only facilitates further diffusion of the air blown out by the second cover 220, but also avoids gaps between the air blown out by the first cover 210 and the second cover 220, which would affect the airflow experience.

[0050] See Figure 6In another embodiment, the first cover 210 includes a plurality of first grid strips 212, each of which is a straight strip. The plurality of first grid strips 212 are spaced apart around the rotation axis b of the fan blade 100. Along the air outlet direction a of the fan blade 100, the first grid strips 212 are inclined away from the rotation direction c of the fan blade 100. The length direction of the straight first grid strips 212 faces the rotation axis b of the fan blade 100. Since the fan blade 100 generates wind by rotating around the rotation axis b, by inclining the straight first grid strips 212 away from the rotation direction c of the fan blade 100, it can be ensured that the wind blown out between the first grid strips 212 is a direct or near-direct wind.

[0051] See Figure 5 In one embodiment, the angle α1 between the surface of the first grid bar 212 facing away from the rotation direction c of the fan blade 100 and the rotation axis b is 5°~25°. Specifically, the angle α1 between the concave surface of the first grid bar 212 and the rotation axis b is 5°~25°. If the angle α1 is less than 5°, the first grid bar 212 will not have an effective air-expanding effect; if the angle α1 is greater than 25°, the wind resistance of the first grid bar 212 will increase during the airflow from the first cover 210, thus affecting the airflow effect. In this embodiment, the angle α1 between the first grid bar 212 and the rotation axis b is 10°~15°. Alternatively, the angle α1 between the first grid bar 212 and the rotation axis b is 5°, 10°, 15°, 20°, or 25°.

[0052] In one embodiment, the thickness of the first grid strip 212 in the rotation direction c of the fan blade 100 gradually increases towards the air outlet direction a of the fan blade 100. On the one hand, as the air is blown out from the inner windward surface 211, the space between two adjacent first grid strips 212 tends to decrease, thereby increasing the wind speed. Simultaneously, it ensures the structural strength of a single first grid strip 212, facilitating the injection molding of the first cover 210.

[0053] In another embodiment, the thickness of the first grid bar 212 can be uniformly set in the air outlet direction a of the fan blade 100. If the thickness of the first grid bar 212 is too small, the strength will be insufficient; if the thickness of the first grid bar 212 is too large, the wind speed will be reduced, affecting the air outlet speed.

[0054] In one embodiment, the thickness of the first cover 210 along the air outlet direction a of the fan blade 100 is 3mm to 10mm. This avoids excessive thickness of the first cover 210, which would cause air loss during the blowing process, and also avoids insufficient thickness of the first cover 210, which would result in poor air guiding effect. Specifically, the thickness of the first cover 210 along the air outlet direction a is 5mm to 8mm. For example, the thickness of the first cover 210 along the air outlet direction a is 4mm, 5mm, 6mm, 7mm, 8mm, or 9mm.

[0055] See Figure 4 In one embodiment, the maximum spacing h1 between two adjacent first grille bars 212 in the arc radius direction is 5mm to 9mm. For example, the maximum spacing h1 between two adjacent first grille bars 212 is 6mm to 8mm, or the maximum spacing h1 between two adjacent first grille bars 212 is 5mm, 6mm, 7mm, 8mm, or 9mm. Of course, the maximum spacing h1 between two adjacent first grille bars 212 in the arc radius direction can also be set according to the diameter of the first cover 210. If the diameter of the first cover 210 is large, the spacing between two adjacent first grille bars 212 can be appropriately increased; if the diameter of the first cover 210 is small, the spacing between two adjacent first grille bars 212 can be appropriately decreased. By controlling the spacing between two adjacent first grille bars 212, the air outlet effect of the first cover 210 is avoided if the spacing is too small, and the structural strength of the first cover 210 is avoided if the spacing is too large.

[0056] Specifically, a plurality of the first grid bars 212 are evenly spaced around the rotation axis b. By evenly spaced the plurality of first grid bars 212, the uniformity of airflow from the first cover 210 can be improved.

[0057] In one embodiment, the included angle formed between the lines connecting the side of the first grid bar 212 facing the rotation axis b and the side of the first grid bar 212 away from the rotation axis b to the rotation axis b is the first arc angle β1 of the first grid bar 212, which is 5° to 60°. For example, the first arc angle β1 is 15° to 50°. Alternatively, the first arc angle β1 is 10°, 20°, 30°, 40°, or 50°. In other embodiments, the first arc angle β1 can also be other angles. Since the concave surface of the first grid bar 212 is opposite to the rotation direction c of the fan blade 100, by setting the first arc angle β1, it can be ensured that the airflow blown out by the first cover 210 is a direct or near-direct airflow.

[0058] In one embodiment, the radius R1 of the first grille 212 is 50mm to 80mm. Optionally, the radius R1 of the first grille 212 is 60mm to 70mm. Alternatively, the radius R1 of the first grille 212 can be 50mm, 60mm, 70mm, or 80mm. This avoids the radius R1 of the first grille 212 being too large or too small, which would affect the air outlet effect of the first cover 210.

[0059] See Figure 1 In one embodiment, the second cover 220 includes a plurality of second grid strips 222, which are arc-shaped strips. The plurality of second grid strips 222 are spaced apart around the rotation axis b of the fan blade 100 and located on the outer periphery of the first cover 210. The concave surface of the second grid strip 222 faces the rotation direction c of the fan blade 100. Since the concave surface of the second grid strip 222 is in the same direction as the rotation direction c of the fan blade 100, when the wind reaches the second grid strip 222, the spiral wind generated by the rotation of the fan blade 100 can be dispersed and blown out at a certain angle under the action of the second grid strip 222 which is bent in the same direction. This not only further increases the air volume of the fan 10, but also increases the coverage area of ​​the wind blown out by the second cover 220.

[0060] In this embodiment, since both the first grid bar 212 and the second grid bar 222 are arc-shaped bars, and the concave surfaces of the first grid bar 212 and the second grid bar 222 are arranged in different directions, a single first grid bar 212 and the adjacent second grid bar 222 form an "S" structure or a similar "S" shape.

[0061] In one embodiment, a plurality of second gratings 222 are evenly spaced around the first cover 210. By evenly spaced the plurality of second gratings 222, the uniformity of airflow from the second cover 220 can be improved, thereby ensuring the airflow effect.

[0062] See Figure 7In one embodiment, the maximum spacing h2 between two adjacent second grille bars 222 in the arc radius direction is 5mm to 9mm. For example, the maximum spacing h2 between two adjacent second grille bars 222 is 6mm to 8mm, or it can be 5mm, 6mm, 7mm, 8mm, or 9mm. Of course, the maximum spacing h2 between two adjacent second grille bars 222 can also be set according to the diameter of the second cover 220. If the diameter of the second cover 220 is large, the spacing between two adjacent second grille bars 222 can be appropriately increased; if the diameter of the second cover 220 is small, the spacing between two adjacent second grille bars 222 can be appropriately decreased. By controlling the spacing between two adjacent second grille bars 222, the effect of excessively small spacing on the air outlet performance of the second cover 220 is avoided, and the structural strength of the second cover 220 is avoided if the spacing is too large.

[0063] In one embodiment, the included angle formed between the lines connecting the side of the second grid bar 222 facing the rotation axis b and the side of the second grid bar 222 away from the rotation axis b to the rotation axis b is the second arc angle β2 of the second grid bar 222. The second arc angle β2 is greater than 0° and less than or equal to 20°. For example, the second arc angle β2 is 5° to 10°. Alternatively, the second arc angle β2 is 5°, 10°, 15°, or 20°. In other embodiments, the second arc angle β2 can also be other angles. Since the concave surface of the second grid bar 222 is in the same direction of rotation c as the fan blade 100, by setting the second arc angle β2, the airflow diffusion effect blown out by the second cover 220 can be guaranteed, and the second arc angle is avoided from being too large, which would affect the wind speed of the wind blown out by the second cover 220.

[0064] In one embodiment, the radius R2 of the second grille 222 is 50mm to 80mm. Alternatively, the radius R2 of the second grille 222 is 60mm to 70mm. Or, the radius R2 of the second grille 222 can be 50mm, 60mm, 70mm, or 80mm. This avoids the radius R2 of the second grille 222 being too large or too small, which could affect the airflow effect from the second cover 220.

[0065] See Figure 7 and Figure 8 In one embodiment, along the air outlet direction a of the fan blade 100, the concave surface of the second grid bar 222 is inclined toward the rotation direction c of the fan blade 100. By inclining the second grid bar 222 relative to the rotation direction c of the fan blade 100, the second grid bar 222 can further guide the airflow to diffuse outwards in all directions, thereby further increasing the airflow volume.

[0066] In one embodiment, the angle α2 between the concave surface of the second grid bar 222 and the rotation axis b is 10°~30°. If the angle α2 is less than 10°, the air amplification effect of the second grid bar 222 is poor; if the angle α2 is greater than 30°, the wind resistance of the second grid bar 222 will increase during the airflow from the second cover 220, thus affecting the airflow effect. In this embodiment, the angle α2 between the concave surface of the second grid bar 222 and the rotation axis b is 15°~25°. Alternatively, the angle α2 between the concave surface of the second grid bar 222 and the rotation axis b is 10°, 15°, 20°, 25°, or 30°. When wind blows out from between the second grid bars 222, the curved and inclined second grid bars 222 will guide the airflow to diffuse outwards.

[0067] In one embodiment, the thickness of the second grid strip 222 in the rotation direction c of the fan blade 100 gradually increases towards the air outlet direction a of the fan blade 100. On one hand, as the wind blows out from the outer windward surface 221, the space between two adjacent second grid strips 222 tends to decrease, thereby increasing the wind speed. Simultaneously, it ensures the structural strength of a single second grid strip 222, facilitating the injection molding of the second cover 220.

[0068] In one embodiment, the thickness of the second cover 220 along the air outlet direction a of the fan blade 100 is greater than 3 mm and less than or equal to 10 mm. This avoids excessive thickness of the second cover 220, which would cause air loss during the blowing process, and also avoids insufficient thickness of the second cover 220, which would result in poor air guiding effect. Specifically, the thickness of the second cover 220 along the air outlet direction a is 5 mm to 8 mm. For example, the thickness of the second cover 220 along the air outlet direction a is 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, or 9 mm.

[0069] See Figure 4 In one embodiment, the first cover 210 further includes a first connecting ring 213. One end of the first grid bar 212 away from the rotation axis b is disposed on the inner ring surface of the first connecting ring 213, and one end of the second grid bar 222 near the rotation axis b is disposed on the outer ring surface of the first connecting ring 213. By providing the first connecting ring 213, the connection between the first grid bar 212 and the second grid bar 222 can be effectively realized, facilitating the spacing of multiple first grid bars 212 and multiple second grid bars 222.

[0070] Optionally, the first cover 210 further includes an intermediate ring 214, which is disposed within the first connecting ring 213 and spaced apart from it. A plurality of first grid strips 212 are spaced apart between the first connecting ring 213 and the intermediate ring 214. The intermediate ring 214 further facilitates the arrangement of the plurality of first grid strips 212 and improves the stability of the spaced arrangement of the plurality of first grid strips 212. In this embodiment, the first cover 210 is formed into a disc-shaped structure.

[0071] See Figure 1 and Figure 7 In one embodiment, the second cover 220 further includes a second connecting ring 223, which is sleeved on the outside of the first connecting ring 213, with the outer ring surface of the first connecting ring 213 and the inner ring surface of the second connecting ring 223 spaced apart. One end of the second grid strip 222 is disposed on the outer ring surface of the first connecting ring 213, and the other end is disposed on the inner ring surface of the second connecting ring 223. By setting the second connecting ring 223, the stability of the arrangement of multiple second grid strips 222 can be improved, and the multiple second grid strips 222 can be arranged at intervals. In this embodiment, the second cover 220 has a disc-shaped structure.

[0072] In one embodiment, the inner diameter of the first connecting ring 213 is 1 / 2 to 3 / 4 of the inner diameter of the second connecting ring 223. The air blown out by the first cover 210 is a direct or near-direct airflow along the rotation axis b of the fan blade 100, while the air blown out by the second cover 220 is a diffused airflow. By controlling the ratio of the inner diameters of the first connecting ring 213 and the second connecting ring 223, the proportion of direct airflow and diffused airflow can be ensured, increasing the airflow while maintaining the user experience. Optionally, the inner diameter of the first connecting ring 213 is 1 / 2 to 2 / 3 of the inner diameter of the second connecting ring 223.

[0073] In this embodiment, the front mesh cover 200 is a plastic mesh cover. Plastic mesh covers are less expensive, lighter, and have a longer service life. In one embodiment, the rear mesh cover 300 is a plastic mesh cover. In another embodiment, the rear mesh cover 300 can also be a metal mesh cover.

[0074] Through experimental testing, the aforementioned fan 10, using the front grille 200 of this invention, achieves an airflow (four-axis airflow) comparable to that of a traditional metal grille. Both its two-axis and four-axis airflow are greater than that of a traditional plastic grille. The two-axis airflow reflects the degree of lateral air diffusion of the fan 10; therefore, the front grille 200 of this invention has a significant advantage in lateral airflow expansion. Furthermore, the central wind speed using the front grille 200 of this invention is significantly higher than that of traditional metal and plastic grilles.

[0075]

[0076] See Figure 9 , Figure 10 , Figure 12 and Figure 13 In one embodiment, the rear mesh cover 300 includes a rear mesh body 310, a first mating part 320, and a locking part 330. The first mating part 320 is disposed at the edge of the rear mesh body 310. The front mesh cover 200 further includes a limiting part 230 and a second mating part 240. The second mating part 240 and the limiting part 230 are spaced apart at the outer edge of the second cover body 220 along the radial direction of the second cover body 220. The limiting part 230 has a limiting groove 231. The first mating part 320 can pass through the second mating part 240 and the limiting part 230. The locking part 330 is disposed on the side of the first mating part 320 facing the limiting part 230, so that the locking part 330 can be locked in the limiting groove 231.

[0077] The rear mesh cover 300 is connected to the front mesh cover 200, such that the first mating part 320 of the rear mesh cover 300 is positioned between the second mating part 240 and the limiting part 230. The mating of the second mating part 240 and the limiting part 230 effectively restricts the deformation of the first mating part 320 and the second mating part 240 in the radial direction, minimizing changes in their relative positional relationship and ensuring the stability of the radial mating between the rear mesh cover 300 and the front mesh cover 200. Simultaneously, the locking part 330 on the rear mesh cover 300 is engaged with the limiting groove 231 of the limiting part 230. This engagement further restricts the movement of the rear mesh cover 300 relative to the front mesh cover 200 in both the axial and circumferential directions, further ensuring the stability of the connection between the rear mesh cover 300 and the front mesh cover 200.

[0078] In another embodiment, the first mating part 320 and the locking part 330 may also be disposed at the outer edge of the second cover 220, and the second mating part 240 and the limiting part 230 may be disposed at the edge of the rear net body 310 of the rear net cover 300.

[0079] In one embodiment, the first mating part 320 is an annular structure, and the annular first mating part 320 surrounds the edge of the rear mesh body 310. Specifically, an annular edge of the first mating part 320 is disposed at the edge of the rear mesh body 310, and the locking part 330 is disposed on the inner annular surface or the outer annular surface of the first mating part 320.

[0080] In one embodiment, the second mating portion 240 is an annular structure, and the annular second mating portion 240 is disposed on the second connecting ring 223. The limiting portion 230 is disposed on one side of the inner annular surface or one side of the outer annular surface of the second mating portion 240.

[0081] In one embodiment, there are at least two locking portions 330, which are circumferentially spaced around the rear mesh body 310 and disposed on the first mating portion 320. The number of limiting portions 230 matches the number of locking portions 330, and each locking portion 330 can be correspondingly locked into a limiting groove 231 on a limiting portion 230. For example, in this embodiment, there are six locking portions 330. In other embodiments, the number of locking portions 330 can also be two, three, four, or other numbers.

[0082] Specifically, different locking parts 330 are evenly spaced around the rear mesh body 310 in the circumferential direction to ensure the uniformity of the cooperation between the locking parts 330 and the limiting parts 230.

[0083] See Figure 10 and Figure 13 In one embodiment, in the circumferential direction of the second cover 220, the distance between the limiting part 230 and the second mating part 240 tends to increase in the direction away from the limiting groove 231. During installation, the locking part 330 is positioned at a location where the distance between the second mating part 240 and the limiting part 230 is larger, thereby facilitating the insertion of the first mating part 320 and the locking part 330 between the second mating part 240 and the limiting part 230. This allows the first mating part 320 to drive the locking part 330 to rotate toward the limiting groove 231, enabling the locking part 330 to gradually squeeze into and be inserted into the limiting groove 231.

[0084] Optionally, the distance between the limiting part 230 and the second mating part 240 located on one side of the limiting groove 231 gradually increases in the direction away from the limiting groove 231. During installation, the locking part 330 can be positioned at a location with a larger distance between the limiting part 230 and the second mating part 240, so that the first mating part 320 and the locking part 330 can be stably inserted between the first mating part 320 and the limiting part 230.

[0085] In one embodiment, the limiting part 230 is a plate-like structure, and the portion of the limiting part 230 with the limiting groove 231 is bent toward the second mating part 240, so that the distance between the portion of the limiting part 230 with the limiting groove 231 and the second mating part 240 is less than the sum of the radial thicknesses of the locking part 330 and the first mating part 320. Since the first mating part 320 and the locking part 330 are disposed between the second mating part 240 and the limiting part 230, when the locking part 330 moves to the position aligned with the limiting groove 231, the locking part 330 can be effectively inserted into the limiting groove 231, ensuring the stability of the locking part 330 locked in the limiting groove 231.

[0086] See Figure 9 , Figure 11 , Figure 12 and Figure 14 In one embodiment, the first mating part 320 has a first connecting hole 340, which is spaced apart from the locking part 330 along the circumference of the rear mesh 310. The second mating part 240 has a second connecting hole 260, which is spaced apart from the limiting part 230 along the circumference of the second cover 220, and the second connecting hole 260 can communicate with the first connecting hole 340. During installation, when the locking part 330 is engaged in the limiting groove 231, the second connecting hole 260 communicates with the first connecting hole 340, thereby facilitating the insertion of fastening screws into the first connecting hole 340 and the second connecting hole 260 to fix the first mating part 320 onto the second mating part 240, ensuring the stability of the connection between the first mating part 320 and the second mating part 240.

[0087] See Figure 11 and Figure 14 In one embodiment, the first mating part 320 has a guide groove 350 on the side facing the second mating part 240, and the first connecting hole 340 is formed on the bottom wall of the guide groove 350. The second mating part 240 has a guide part 270 on the side facing the first mating part 320, and the second connecting hole 260 is engaged with the guide part 270. The guide part 270 can pass through the guide groove 350 so that the second connecting hole 260 and the first connecting hole 340 are correspondingly connected. During installation, when the locking groove 132 is engaged in the limiting groove 231, the guide part 270 is located in the guide groove 350. By setting the cooperation between the guide groove 350 and the guide part 270, the stability of the connection between the first mating part 320 and the second mating part 240 can be further guaranteed.

[0088] Specifically, the guide groove 350 penetrates the first mating part 320 and forms an insertion port on the side opposite to the rear mesh body 310. The inner wall of the guide groove 350 adjacent to the insertion port is inclined to form a guide surface, which faces the insertion port. When the guide part 270 can be inserted into the guide groove 350 through the insertion port, the guide surface is used to improve the stability and efficiency of the guide part 270 being inserted into the guide groove 350.

[0089] In another embodiment, a guide portion 270 is provided on the side of the first mating portion 320 facing the second mating portion 240, the first connecting hole 340 is formed on the guide portion 270, a guide groove 350 is provided on the side of the second mating portion 240 facing the first mating portion 320, and the second connecting hole 260 is formed on the bottom wall of the guide groove 350. The guide portion 270 can pass through the guide groove 350 so that the second connecting hole 260 and the first connecting hole 340 are correspondingly connected.

[0090] In one embodiment, the mesh assembly 10 further includes a support portion 360, which has a third connecting hole. The support portion 360 is disposed on the side of the first mating portion 320 facing away from the second mating portion 240, or on the side of the second mating portion 240 facing away from the first mating portion 320. The first connecting hole 340, the second connecting hole 260, and the third connecting hole are correspondingly connected. Since the thickness of the first mating portion 320 and the second mating portion 240 in the radial direction is small, the support portion 360 can provide connection support for the fastening screw. In this embodiment, the support portion 360 is integrally formed on the first mating portion 320.

[0091] See Figure 1 and Figure 15 In one embodiment, the mesh assembly 10 further includes a mounting member 400, which is mounted on the side of the rear mesh 300 opposite to the front mesh 200. The fan 10 also includes a drive member, which is mounted on the mounting member 400 and is used to drive the fan blades 100 to rotate within the receiving space.

[0092] Specifically, the mounting component 400 includes a first mounting portion 410 and a second mounting portion 420 disposed on the first mounting portion 410. The second mounting portion 420 has a drive hole 422. The rear grille 300 has a mounting hole 370. One of the first mounting portion 410 and the rear grille 300 has a hook 430, and the other has a slot 380. The second mounting portion 420 has a first limiting structure 440, and the inner wall of the mounting hole 370 has a second limiting structure 390. The second mounting portion 420 passes through the mounting hole 370 so that the second limiting structure 390 can engage with the first limiting structure 440. The hook 430 is engaged in the slot 380. The drive component is connected to the fan blade 100 through the drive hole 422.

[0093] By inserting the second mounting portion 420 of the mounting component 400 into the mounting hole 370, the first limiting structure 440 and the second limiting structure 390 can be engaged to limit the second mounting portion 420 within the mounting hole 370, thus preventing the second mounting portion 420 from rotating and providing a foolproof assembly effect, improving installation efficiency. Simultaneously, the first mounting portion 410 and the rear mesh cover 300 are engaged via the hook 430 and the slot 380, further restricting the movement of the mounting component 400 away from the rear mesh cover 300, ensuring a stable assembly of the mounting component 400 onto the rear mesh cover 300.

[0094] In one embodiment, the fan 10 is a floor fan. In other embodiments, the fan 10 may also be a ceiling fan, table fan, wall fan, overhead fan, air conditioning fan, or other types of fan 10.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0097] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0098] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0099] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0100] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0101] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A front screen guard characterized by, The front mesh cover includes: A first cover, the first cover comprising a plurality of first grid strips; and The second cover includes a plurality of second grids. The second cover is fitted onto the outer periphery of the first cover. The surface of the second cover facing the fan blade is the outer windward surface, and the outer windward surface is inclined towards the air outlet direction of the fan blade along a direction away from the first cover. The surface of the first cover facing the fan blade is the inner windward surface, which is inclined towards the air outlet direction of the fan blade along the rotation axis of the fan blade. The angle between the inner windward surface and the plane perpendicular to the rotation axis is greater than or equal to 0° and less than 15°; The angle between the outer windward surface and the plane perpendicular to the rotation axis is greater than 0° and less than 15°; The concave surface of the first grid bar is facing away from the rotation direction of the fan blade, and the concave surface of the second grid bar faces the rotation direction of the fan blade; The included angle formed between the side of the first grid bar facing the axis of rotation and the side of the first grid bar away from the axis of rotation and the line connecting them to the axis of rotation is the first arc encirclement angle β1 of the first grid bar, and the first arc encirclement angle β1 is 5°~60°; The included angle formed between the side of the second grid bar facing the axis of rotation and the side of the second grid bar away from the axis of rotation and the line connecting them to the axis of rotation is the second arc wrap angle β2 of the second grid bar, which is greater than 0° and less than or equal to 20°.

2. The front screen guard according to claim 1, wherein The first grid bar is an arc-shaped bar, and multiple first grid bars are arranged at intervals around the rotation axis of the fan blade. Along the air outlet direction of the fan blade, the first grid bars are inclined away from the rotation direction of the fan blade.

3. The front screen guard of claim 2, wherein, The thickness of the first grid bar gradually increases in the direction of rotation of the fan blade towards the direction of air outlet of the fan blade.

4. The front screen guard of claim 2, wherein, The angle between the surface of the first grid bar facing away from the direction of rotation of the wind turbine and the axis of rotation is 5° to 25°.

5. The precursor screen hood according to any one of claims 1-4, wherein, The second grid bar is an arc-shaped bar, and multiple second grid bars are spaced apart around the rotation axis of the fan blade and located on the outer periphery of the first cover.

6. The front screen guard of claim 5, wherein, Along the air outlet direction of the fan blade, the concave surface of the second grid bar is inclined toward the rotation direction of the fan blade.

7. The front screen guard of claim 6, wherein, The thickness of the second grid bar gradually increases in the direction of rotation of the fan blade towards the direction of air outlet of the fan blade.

8. The front screen guard of claim 6, wherein, The angle between the concave surface of the second grid bar and the rotation axis is 10°~30°.

9. The front screen guard of claim 6, wherein, The thickness of the first cover along the air outlet direction of the fan blade is 3mm to 10mm; and / or The thickness of the second cover along the air outlet direction of the fan blade is greater than 3mm and less than or equal to 10mm.

10. A screen assembly characterized by, The mesh assembly includes: The front mesh cover as described in any one of claims 1-9; and The rear mesh cover is connected to one side of the outer windward side of the front mesh cover, and the rear mesh cover and the front mesh cover form a receiving space for installing the fan blades.

11. A fan, characterized by The fan includes: Wind-blown leaves; and The mesh assembly of claim 10, wherein the fan blade is disposed within the receiving space such that the outer windward surface faces the fan blade.

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