阅读说明：本技术 风扇、网罩组件及前网罩 (Fan, screen panel subassembly and preceding screen panel ) 是由 梁浩 柳洲 刘建优 陈宇强 王勇 于 2021-01-14 设计创作，主要内容包括：本发明涉及一种风扇、网罩组件及前网罩,前网罩包括第一罩体及第二罩体。后网罩与前网罩连接,风叶设置于前网罩与后网罩围成的收容空间。第一罩体的第一栅条的内凹面与风叶的转动方向相反,当气流通过第一罩体出风时,会在第一栅条的导流作用下沿着第一栅条吹出,进而在第一罩体对应的区域形成直吹风或接近直吹的风。由于第二罩体的第二栅条设置于第一罩体的外周侧,而第二栅条的内凹面与风叶的转动方向相同,进而气流到达第二栅条处时,由于风叶旋转产生的螺旋风在同向弯曲的第二栅条的作用下,能够呈一定角度的发散吹出,不仅能够增大风扇的风量,同时增大吹出的风的覆盖区域。(The invention relates to a fan, a mesh enclosure assembly and a front mesh enclosure. The rear mesh enclosure is connected with the front mesh enclosure, and the fan blades are arranged in an accommodating space defined by the front mesh enclosure and the rear mesh enclosure. The inner concave surface of the first grid of the first cover body is opposite to the rotation direction of the fan blades, when air flows out through the first cover body, the air flows can be blown out along the first grid under the flow guiding effect of the first grid, and then direct blowing or nearly direct blowing air is formed in the area corresponding to the first cover body. Because the second grid bars of the second cover body are arranged on the outer peripheral side of the first cover body, and the inner concave surfaces of the second grid bars are in the same rotating direction as the fan blades, when airflow reaches the second grid bars, spiral wind generated by the rotation of the fan blades can be divergently blown out at a certain angle under the action of the second grid bars which are bent in the same direction, so that the air volume of the fan can be increased, and meanwhile, the coverage area of the blown wind is increased.)

1. The utility model provides a preceding screen panel, its characterized in that, preceding screen panel includes:

the first cover body comprises a plurality of first grid bars, the first grid bars are arc-shaped bars, the first grid bars are arranged around the rotating axis of the fan blade at intervals, and the outer convex surfaces of the first grid bars face the rotating direction of the fan blade; and

the second cover body comprises a plurality of second grid bars, the second grid bars are arc-shaped bars, the second grid bars are arranged around the rotating axis of the fan blade at intervals and are positioned on the outer peripheral side of the first cover body, and the inner concave surfaces of the second grid bars face the rotating direction of the fan blade.

2. The front mesh enclosure of claim 1, wherein an included angle formed between a connecting line of the rotation axis and each of a side edge of the first mesh bar facing the rotation axis and a side edge of the first mesh bar far away from the rotation axis is a first arc wrap angle of the first mesh bar, and the first arc wrap angle is 5-60 degrees; and/or

The included angle formed between the side edge of the second grid bar facing the rotating axis and the side edge of the second grid bar far away from the rotating axis and the connecting line of the rotating axis respectively is a second arc wrap angle of the second grid bar, and the second arc wrap angle is larger than 0 degree and smaller than or equal to 20 degrees.

3. The front mesh enclosure of claim 1, wherein the arc radius of the first grid is 50mm to 80 mm; and/or

The arc radius of the second grid bars is 50 mm-80 mm.

4. The front mesh enclosure of claim 1, wherein the maximum distance between two adjacent first grids in the direction of the radius of the circular arc is 5mm to 9 mm; and/or

The maximum distance between every two adjacent second grids in the arc radius direction is 5-9 mm.

5. The front mesh enclosure of any one of claims 1-4, wherein the first enclosure further comprises a first connecting ring, wherein an end of the first bar distal from the rotation axis is disposed on an inner annular surface of the first connecting ring, and an end of the second bar proximal to the rotation axis is disposed on an outer annular surface of the first connecting ring.

6. The front mesh enclosure of claim 5, wherein the second cover body further comprises a second connecting ring, the second connecting ring is sleeved outside the first connecting ring, an outer annular surface of the first connecting ring and an inner annular surface of the second connecting ring are spaced apart from each other, one end of the second grid is disposed on the outer annular surface of the first connecting ring, and the other end of the second grid is disposed on the inner annular surface of the second connecting ring.

7. The front mesh enclosure of claim 6, wherein the inner diameter of the first connection ring is 1/2-3/4 of the inner diameter of the second connection ring.

8. The front mesh enclosure of any one of claims 1-4, wherein the thickness of the first grid in the direction around the rotation axis gradually increases along the air outlet direction of the fan blade; and/or

The thickness of the second grid bars in the direction around the rotating axis is gradually increased along the air outlet direction of the fan blades.

9. The front mesh enclosure of any one of claims 1-4, wherein a plurality of said first grill bars are evenly spaced about said axis of rotation; and/or

The second grid bars are arranged around the first cover body at intervals.

10. The front mesh enclosure according to any one of claims 1-4, wherein the front mesh enclosure is a plastic mesh enclosure.

11. The mesh enclosure assembly, wherein the mesh enclosure assembly comprises:

the front mesh enclosure of any one of claims 1-10; and

the rear net cover is connected with the front net cover, and an accommodating space for mounting the fan blades is formed by the rear net cover and the front net cover in a surrounding mode.

12. A fan, characterized in that the fan comprises:

a fan blade; and

the screen assembly of claim 11, wherein the fan blades are disposed in the receiving space.

Technical Field

The invention relates to the technical field of fan structures, in particular to a fan, a mesh enclosure assembly and a front mesh enclosure.

Background

The fan drives the fan blades to rotate at a high speed through the motor, so that the airflow is accelerated to achieve the effects of cooling and air circulation. The fan mainly includes a front mesh enclosure, a rear mesh enclosure, a fan blade and a motor, wherein the motor drives the fan blade to rotate in a space enclosed by the front mesh enclosure and the rear mesh enclosure to generate high-speed airflow to supply air forwards. The front net cover and the rear net cover are arranged at the periphery of the fan blade and mainly used for safety protection, and the front net cover can achieve the function of dredging air flow. However, the conventional fan has a problem of small air volume in the process of blowing air out through the front mesh enclosure.

Disclosure of Invention

The invention provides a fan, a mesh enclosure assembly and a front mesh enclosure aiming at the problem that the air volume of the air discharged by a traditional fan is small, and the fan, the mesh enclosure assembly and the front mesh enclosure can achieve the technical effect of improving the air volume.

A front mesh enclosure comprises a first cover body and a second cover body, wherein the first cover body comprises a plurality of first grid bars, the first grid bars are arc-shaped bars, the first grid bars are arranged around the rotating axis of a fan blade at intervals, and the outer convex surfaces of the first grid bars face the rotating direction of the fan blade; the second cover body comprises a plurality of second grid bars, the second grid bars are arc-shaped bars, the second grid bars are arranged around the rotating axis of the fan blade at intervals and are positioned on the outer peripheral side of the first cover body, and the inner concave surfaces of the second grid bars face the rotating direction of the fan blade.

In one embodiment, an included angle formed between a connecting line of a side edge of the first grid facing the rotation axis and a connecting line of a side edge of the first grid far away from the rotation axis and the rotation axis is a first arc wrap angle of the first grid, and the first arc wrap angle is 5-60 degrees; and/or

The included angle formed between the side edge of the second grid bar facing the rotating axis and the side edge of the second grid bar far away from the rotating axis and the connecting line of the rotating axis respectively is a second arc wrap angle of the second grid bar, and the second arc wrap angle is larger than 0 degree and smaller than or equal to 20 degrees.

In one embodiment, the arc radius of the first grid bars is 50 mm-80 mm; and/or

The arc radius of the second grid bars is 50 mm-80 mm.

In one embodiment, the maximum distance between two adjacent first grid bars in the arc radius direction is 5-9 mm; and/or

The maximum distance between every two adjacent second grids in the arc radius direction is 5-9 mm.

In one embodiment, the first cover further includes a first connection ring, one end of the first grid away from the rotation axis is disposed on an inner annular surface of the first connection ring, and one end of the second grid close to the rotation axis is disposed on an outer annular surface of the first connection ring.

In one embodiment, the second cover body further includes a second connection ring, the second connection ring is sleeved outside the first connection ring, an outer annular surface of the first connection ring and an inner annular surface of the second connection ring are spaced apart from each other, one end of the second grid is disposed on the outer annular surface of the first connection ring, and the other end of the second grid is disposed on the inner annular surface of the second connection ring.

In one embodiment, the inner diameter of the first connecting ring is 1/2-3/4 of the inner diameter of the second connecting ring.

In one embodiment, the thickness of the first grid in the direction around the rotation axis gradually increases along the air outlet direction of the fan blade; and/or

The thickness of the second grid bars in the direction around the rotating axis is gradually increased along the air outlet direction of the fan blades.

In one embodiment, a plurality of the first bars are evenly spaced around the rotation axis; and/or

The second grid bars are arranged around the first cover body at intervals.

In one embodiment, the front mesh enclosure is a plastic mesh enclosure.

The mesh enclosure assembly comprises the front mesh enclosure and a rear mesh enclosure, wherein the rear mesh enclosure is connected with the front mesh enclosure, and a containing space for mounting fan blades is formed by the rear mesh enclosure and the front mesh enclosure in a surrounding mode.

A fan comprises fan blades and the mesh enclosure assembly, wherein the fan blades are arranged in the accommodating space.

The fan, the screen assembly and the front screen connect the rear screen with the front screen, and the fan blades are arranged in the accommodating space defined by the front screen and the rear screen. Because the first cover body of preceding screen panel is located the middle part of the second cover body, and the outer convex surface of the first grid of the first cover body is towards the direction of rotation of fan blade to make the interior concave surface of first grid opposite with the direction of rotation of fan blade, and then when the air current was out of wind through the first cover body, can blow off along first grid under the water conservancy diversion effect of first grid, and then form the wind of directly blowing or being close to directly blowing in the region that the first cover body corresponds. Because the second grid bars of the second cover body are arranged on the outer peripheral side of the first cover body, and the inner concave surfaces of the second grid bars are in the same rotating direction as the fan blades, when airflow reaches the second grid bars, spiral wind generated by the rotation of the fan blades can be divergently blown out at a certain angle under the action of the second grid bars which are bent in the same direction, so that the air volume of the fan can be increased, and meanwhile, the coverage area of the blown wind is increased.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Furthermore, the drawings are not to scale of 1:1, and the relative dimensions of the various elements in the drawings are drawn only by way of example and not necessarily to true scale. In the drawings:

FIG. 1 is a schematic diagram of a fan according to an embodiment;

FIG. 2 is a partial schematic structural view of the first housing of FIG. 1;

FIG. 3 is a partial cross-sectional view of the first shell shown in FIG. 2;

FIG. 4 is a partial schematic structural view of the second housing of FIG. 1;

FIG. 5 is a partial cross-sectional view of the second shell shown in FIG. 4;

FIG. 6 is a cross-sectional view of the front mesh enclosure of FIG. 1;

FIG. 7 is a partial cross-sectional view of the front mesh enclosure shown in FIG. 6;

FIG. 8 is a schematic diagram of an embodiment of a rear mesh enclosure;

FIG. 9 is an enlarged view taken at A in FIG. 8;

FIG. 10 is an enlarged view at B in FIG. 8;

FIG. 11 is a schematic view of a front mesh cover in an embodiment;

FIG. 12 is an enlarged view at C of FIG. 11;

FIG. 13 is an enlarged view at D of FIG. 11;

fig. 14 is an exploded view of the rear mesh and the mounting member in an embodiment.

Description of reference numerals:

10. a fan; 100. a fan blade; 200. a front mesh enclosure; 210. a first cover body; 211. an inner windward side; 212. a first grid; 213. a first connecting ring; 214. an intermediate ring 220, a second cover body; 221. an outer windward side; 222. a second grid; 223. a second connection ring; 230. a limiting part; 231. a limiting groove; 240. a second mating portion; 260. a second connection hole; 270. a guide portion; 300. a rear net cover; 310. a rear net body; 320. a first mating portion; 330. a clamping part; 340. a first connection hole; 350. a guide groove; 360. a support portion; 370. mounting holes; 380. a card slot; 390. a second limit structure; 400. a mounting member; 410. a first mounting portion; 420. a second mounting portion; 422. a drive aperture; 430. a hook is clamped; 440. first limit structure.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1, in an embodiment of the present invention, a fan 10 includes a blade 100 and a mesh enclosure assembly, wherein the blade 100 is disposed in the mesh enclosure assembly and can rotate in the mesh enclosure assembly. Specifically, the mesh enclosure assembly includes a front mesh enclosure 200 and a rear mesh enclosure 300 (as shown in fig. 8), the rear mesh enclosure 300 is connected to the front mesh enclosure 200, an accommodating space is defined by the rear mesh enclosure 300 and the front mesh enclosure 200, the fan blade 100 is installed in the accommodating space, and the fan blade 100 can rotate in the accommodating space.

In an embodiment, the front mesh enclosure 200 includes a first mesh enclosure 210 and a second mesh enclosure 220, the first mesh enclosure includes a plurality of first grid bars 212, the first grid bars 212 are arc-shaped bars, the plurality of first grid bars 212 are arranged around the rotation axis b of the fan blade 100 at intervals, and an outer convex surface of the first grid bars 212 faces the rotation direction c of the fan blade 100. The second cover 220 includes a plurality of second grid bars 222, the second grid bars 222 are arc-shaped bars, the second grid bars 222 are arranged around the rotation axis b of the fan blade 100 at intervals and located on the outer peripheral side of the first cover 210, and the inner concave surface of the second grid bars 222 faces the rotation direction c of the fan blade 100.

The fan 10, the mesh enclosure assembly and the front mesh enclosure 200 connect the rear mesh enclosure 300 and the front mesh enclosure 200, and the fan blades 100 are disposed in the accommodating space defined by the front mesh enclosure 200 and the rear mesh enclosure 300. Because the first cover 210 of the front net cover 200 is located in the middle of the second cover 220, and the outer convex surface of the first grid 212 of the first cover 210 faces the rotation direction c of the fan blade 100, so that the inner concave surface of the first grid 212 is opposite to the rotation direction c of the fan blade 100, when air flows out through the first cover 210, the air flows can be blown out along the first grid 212 under the flow guiding effect of the first grid 212, and then a straight blow or an approximately straight blow along the rotation axis b of the fan blade 100 is formed in the region corresponding to the first cover 210. Because the second grid bars 222 of the second cover 220 are arranged on the outer periphery of the first cover 210, and the inner concave surface of the second grid bars 222 is the same as the rotation direction c of the fan blade 100, when the airflow reaches the second grid bars 222, the spiral wind generated by the rotation of the fan blade 100 can be divergently blown out at a certain angle under the action of the second grid bars 222 which are bent in the same direction, so that the air volume of the fan 10 can be increased, and the coverage area of the blown wind can be increased.

In this embodiment, since the first grid bars 212 and the second grid bars 222 are both arc-shaped bars, and the directions of the concave surfaces of the first grid bars 212 and the second grid bars 222 are different, a single first grid bar 212 and an adjacent second grid bar 222 form an "S" structure or a structure similar to an "S" structure. In other embodiments, the first bars 212 may also be straight bars, and the length direction of the first bars 212 of the straight bars faces the rotation axis of the fan blade. In another embodiment, the second bars 222 may also be straight bars, and the length direction of the second bars 222 of the straight bars faces the rotation axis of the fan blade.

In one embodiment, the first bars 212 are uniformly spaced around the rotation axis b. By providing the plurality of first grill bars 212 at uniform intervals, the uniformity of the air discharged from first cover 210 can be improved. . In one embodiment, the second bars 222 are uniformly spaced around the first cover 210. Through setting up a plurality of second bars 222 even interval, can improve by the homogeneity of the second cover body 220 air-out, and then guarantee the wind sense effect.

Referring to fig. 2, in an embodiment, the first cover 210 further includes a first connection ring 213, an end of the first bar 212 away from the rotation axis b is disposed on an inner annular surface of the first connection ring 213, and an end of the second bar 222 close to the rotation axis b is disposed on an outer annular surface of the first connection ring 213. The first connection ring 213 can effectively connect the first grid bars 212 to the second grid bars 222, so that the first grid bars 212 and the second grid bars 222 are arranged at intervals.

Optionally, the first cap 210 further includes an intermediate ring 214, the intermediate ring 214 is disposed in the first connection ring 213 and spaced apart from the first connection ring 213, and the plurality of first bars 212 are disposed between the first connection ring 213 and the intermediate ring 214. The arrangement of the plurality of first grids 212 is further facilitated by arranging the intermediate ring 214, and the stability of the spaced arrangement of the plurality of first grids 212 is improved. In the present embodiment, the first cover 210 is formed in a disc-shaped structure.

Referring to fig. 1 and 4, in an embodiment, the second cover 220 further includes a second connection ring 223, the second connection ring 223 is sleeved outside the first connection ring 213, an outer circumferential surface of the first connection ring 213 and an inner circumferential surface of the second connection ring 223 are spaced apart from each other, one end of the second grid 222 is disposed on the outer circumferential surface of the first connection ring 213, and the other end is disposed on the inner circumferential surface of the second connection ring 223. The arrangement stability of the plurality of second grill bars 222 can be improved by providing the second connection ring 223, and the plurality of second grill bars 222 can be arranged at intervals. In this embodiment, the second housing 220 has a disc-shaped structure.

In one embodiment, the inner diameter of the first connection ring 213 is 1/2-3/4 of the inner diameter of the second connection ring 223. The air blown out through the first cover 210 is a straight air blow or an approximately straight air blow along the rotation axis b of the fan blade 100, and the air blown out through the second cover 220 is a diffused air. By controlling the inner diameter ratio of the first connecting ring 213 to the second connecting ring 223, the ratio of direct air blowing to diffused air can be ensured, and the user experience can be ensured while the air volume is increased. Optionally, the inner diameter of the first connection ring 213 is 1/2-2/3 of the inner diameter of the second connection ring 223.

Referring to fig. 2, in an embodiment, the maximum distance h1 between two adjacent first grids 212 in the arc radius direction is 5mm to 9 mm. For example, the maximum distance h1 between two adjacent first grills 212 is 6mm to 8mm, or the maximum distance h1 between two adjacent first grills 212 is 5mm, 6mm, 7mm, 8mm, or 9 mm. Of course, the maximum distance h1 between two adjacent first grids 212 in the arc radius direction may also be set according to the diameter of the first cover 210, if the diameter of the first cover 210 is larger, the distance between two adjacent first grids 212 may be appropriately increased, and if the diameter of the first cover 210 is smaller, the distance between two adjacent first grids 212 may be appropriately decreased. By controlling the distance between two adjacent first grid bars 212, the influence of too small distance on the air outlet effect of the first cover 210 is avoided, and the influence of too large distance on the structural strength of the first cover 210 is avoided.

In one embodiment, an included angle formed between a connection line of the side edge of the first grid 212 facing the rotation axis b and the side edge of the first grid 212 far away from the rotation axis b and the rotation axis b is a first arc wrap angle β 1 of the first grid 212, and the first arc wrap angle β 1 is 5 ° to 60 °. For example, the first arc wrap angle β 1 is 15 ° to 50 °. Or the first arc wrap angle β 1 is 10 °, 20 °, 30 °, 40 °, or 50 °. In other embodiments, the first arc wrap angle β 1 may also be other angles. Because the inner concave surface of the first grid bar 212 is opposite to the rotation direction c of the fan blade 100, the first arc wrap angle β 1 is set, so that the air flow blown out by the first cover 210 can be ensured to be a straight air flow or an approximately straight air flow. Wherein, a connecting line between the side edge of the first grid 212 facing the rotation axis b and the rotation axis b is a shortest connecting line; the connecting line between the side edge of the first grid 212 far away from the rotation axis b and the rotation axis b is the shortest connecting line.

In one embodiment, the radius R1 of the arc of the first grid 212 is 50mm to 80 mm. Optionally, the circular arc radius R1 of the first grid 212 is 60mm to 70 mm. Optionally, the circular arc radius R1 of the first grid 212 is 50mm, 60mm, 70mm or 80 mm. The arc radius R1 of the first grid 212 is prevented from being too large or too small to affect the air outlet effect of the first cover 210.

Referring to fig. 3, in an embodiment, the thickness of the first cover 210 along the air outlet direction a of the fan blade 100 is 3mm to 10 mm. The loss of wind in the blowing-out process due to the excessively large thickness of the first cover 210 is avoided, and the poor wind guiding effect of the first cover 210 due to the excessively small thickness of the first cover 210 is avoided. Specifically, the thickness of the first cover 210 along the air outlet direction a is 5mm to 8 mm. For example, the thickness of the first cover 210 in the air outlet direction a is 4mm, 5mm, 6mm, 7mm, 8mm, or 9 mm.

In one embodiment, the thickness of the first grid 212 in the rotation direction c of the fan blade 100 gradually increases toward the air outlet direction a of the fan blade 100. On one hand, in the process that wind is blown out from the first grid bars 212, the space between two adjacent first grid bars 212 is reduced in area, and therefore the effect of improving the wind speed can be achieved. Meanwhile, the structural strength of the single first grid 212 can be ensured, and the injection molding of the first cover 210 is facilitated.

Specifically, along the air outlet direction a of the fan blade 100, the first grid bars 212 are disposed to be inclined away from the rotation direction c of the fan blade 100. Because the first bars 212 are arc-shaped bars, the wind blown out from between the first bars 212 can be close to a straight wind. And because the wind generated by the fan blade 100 is located at the first cover 210, the wind speed is high, and the first grid bars 212 are obliquely arranged in the direction opposite to the rotation direction c of the fan blade 100, so that the wind can be properly diffused outwards in the process of blowing out the wind along the surfaces of the first grid bars 212 and is converged with the wind blown out by the second cover 220, thereby not only facilitating the further diffusion of the wind blown out by the second cover 220, but also avoiding the occurrence of gaps between the wind respectively blown out by the first cover 210 and the second cover 220 and influencing the wind experience.

In one embodiment, an included angle α 1 between a surface of the first grid 212 facing away from the rotation direction c of the fan blade 100 and the rotation axis b is 5 ° to 25 °. Specifically, an included angle α 1 between the concave surface of the first grid 212 and the rotation axis b is 5 ° to 25 °. If the included angle α 1 is smaller than 5 °, the first grid bars 212 will not have an effective wind spreading effect; if the included angle α 1 is greater than 25 °, the wind resistance of the first grid 212 will increase during the process of wind outlet from the first cover 210, and the wind outlet effect will be affected. In this embodiment, an included angle α 1 between the first grid 212 and the rotation axis b is 10 ° to 15 °. Alternatively, the included angle α 1 between the first grid bar 212 and the rotation axis b is 5 °, 10 °, 15 °, 20 ° or 25 °.

Referring to fig. 4, in an embodiment, the maximum distance h2 between two adjacent second grids 222 in the arc radius direction is 5mm to 9 mm. For example, the maximum distance h2 between two adjacent second grills 222 is 6mm to 8mm, or the maximum distance h2 between two adjacent second grills 222 is 5mm, 6mm, 7mm, 8mm, or 9 mm. Of course, the maximum distance h2 between two adjacent second grids 222 may also be set according to the diameter of the second cover 220, if the diameter of the second cover 220 is larger, the distance between two adjacent second grids 222 may be appropriately increased, and if the diameter of the second cover 220 is smaller, the distance between two adjacent second grids 222 may be appropriately decreased. By controlling the distance between two adjacent second grid bars 222, the influence of too small distance on the air outlet effect of the second cover 220 is avoided, and the influence of too large distance on the structural strength of the second cover 220 is avoided.

In an embodiment, an included angle formed between a connection line between a side of the second grid 222 facing the rotation axis b and a side of the second grid 222 away from the rotation axis b and the rotation axis b is a second arc wrap angle β 2 of the second grid 222, and the second arc wrap angle β 2 is greater than 0 ° and less than or equal to 20 °. For example, the second arc wrap angle β 2 is 5 ° to 10 °. Or the second arc wrap angle β 2 is 5 °, 10 °, 15 °, or 20 °. In other embodiments, the second arc wrap angle β 2 may also be other angles. Because the inner concave surface of the second grid 222 is the same as the rotation direction c of the fan blade 100, the second arc wrap angle β 2 is set, so that the airflow diffusion effect blown out by the second cover 220 can be ensured, and the influence on the wind speed of the wind blown out by the second cover 220 due to the overlarge second arc wrap angle is avoided. Wherein, a connecting line between the side edge of the second grid 222 facing the rotation axis b and the rotation axis b is a connecting line with the shortest distance therebetween; the connecting line between the side edge of the second grid 222 away from the rotation axis b and the rotation axis b is the shortest connecting line.

In one embodiment, the radius R2 of the arc of the second grid 222 is 50mm to 80 mm. The arc radius R2 of the second grid 222 is 60-70 mm. Optionally, the radius R250mm, 60mm, 70mm or 80mm of the arc of the second grid 222. The arc radius R2 of the second grid 222 is prevented from being too large or too small to affect the air outlet effect of the second cover 220.

Referring to fig. 5, in an embodiment, the thickness of the second cover 220 along the air outlet direction a of the fan blade 100 is greater than 3mm and less than or equal to 10 mm. The loss of the wind in the blowing-out process due to the overlarge thickness of the second cover body 220 is avoided, and the poor wind guiding effect of the second cover body 220 due to the undersize thickness of the second cover body 220 is avoided. Specifically, the thickness of the second cover 220 along the air outlet direction a is 5mm to 8 mm. For example, the thickness of the second cover 220 in the air outlet direction a is 4mm, 5mm, 6mm, 7mm, 8mm or 9 mm.

In an embodiment, the thickness of the second grid 222 in the rotation direction c of the fan blade 100 gradually increases toward the air outlet direction a of the fan blade 100. On one hand, in the process that wind blows out from the second cover 220, the space between two adjacent second grids 222 reduces the area, and therefore the effect of increasing the wind speed can be achieved. Meanwhile, the structural strength of the single second grid 222 can be ensured, which is convenient for injection molding of the second cover 220.

In an embodiment, along the air outlet direction a of the fan blade 100, the concave surface of the second grid 222 is inclined toward the rotation direction c of the fan blade 100. The second grid bars 222 are arranged in an inclined manner relative to the rotation direction c of the fan blade 100, so that the second grid bars 222 can further guide the air to diffuse and flow out to the periphery, and the air volume of the air is further increased.

In an embodiment, an included angle α 2 between the concave surface of the second grid 222 and the rotation axis b is 10 ° to 30 °. If the included angle α 2 is smaller than 10 °, the second grid bar 222 has poor wind spreading effect; if the included angle α 2 is greater than 30 °, the wind resistance of the second grid bar 222 will increase during the air outlet process of the second cover 220, and the air outlet effect will be affected. In this embodiment, an included angle α 2 between the concave surface of the second grid 222 and the rotation axis b is 15 ° to 25 °. Alternatively, the included angle α 2 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 grills 222, the second grills 222 bent and inclined downwind guide the wind to diffuse and flow out to the periphery.

Referring to fig. 6 and 7, in an embodiment, a surface of the second cover 220 facing the fan blade 100 is an outer windward side 221, and the outer windward side 221 is inclined toward an air outlet direction a of the fan blade 100 along a direction away from the first cover 210. Specifically, the rear mesh enclosure 300 is connected to one side of an outer windward side 221 of the front mesh enclosure 200, and the outer windward side 221 is disposed toward the fan blade 100. By utilizing the wall attachment effect of the wind in the blowing process, the wind blown from the outer windward side 221 through the second cover 220 can be further diffused outwards, so that the air supply range can be enlarged, and the air supply quantity can be ensured.

Specifically, an included angle θ 1 between the outer windward side 221 and a plane perpendicular to the rotation axis b of the fan blade 100 is greater than 0 ° and less than 15 °. By controlling the inclined included angle θ 1 of the outer windward side 221, the wind spreading effect of the outer windward side 221 can be further ensured, and the influence on the air outlet effect due to the overlarge distance between the outer windward side 221 and the fan blade 100 caused by the overlarge included angle θ 1 is avoided. For example, the angle θ 1 between the outer windward side 221 and a plane perpendicular to the rotation axis b is 5 °, 10 °, or 15 °. Alternatively, the angle θ 1 between the outer windward side 221 and a plane perpendicular to the rotation axis b may also be smaller than 10 °.

In an embodiment, a surface of the first cover 210 facing the fan blade 100 is an inner windward side 211, and the inner windward side 211 is inclined toward an air outlet direction a of the fan blade 100 along a direction facing a rotation axis b of the fan blade 100. By utilizing the wall attachment effect of the wind in the blowing process, the wind blown from the inner windward surface 211 can be gathered inwards, and the wind speed of the wind blown from the first cover body 210 is ensured, so that the frontal wind sensation is ensured. Meanwhile, the second cover 220 is matched, so that the wind blown out from the middle part has high wind speed and strong wind feeling, and the wind blown out from the outer periphery side by the second cover 220 has large wind quantity and large wind supply range.

Specifically, an angle θ 2 between the inner windward surface 211 and a plane perpendicular to the rotation axis b is greater than or equal to 0 ° and less than 15 °. When the included angle θ 2 between the inner windward surface 211 and the plane perpendicular to the rotation axis b is 0 °, the wind generated by the fan blade 100 can be directly blown out by the first cover 210. If the included angle θ 2 between the inner windward surface 211 and the plane perpendicular to the rotation axis b is set to be greater than 0 °, the wind that is properly gathered by the inner windward surface 211 can be sent out by the first cover 210. For example, the angle θ 2 between the inner wind-facing surface 211 and a plane perpendicular to the rotation axis b is 5 °, 10 °, or 15 °. Alternatively, the angle θ 2 between the inner windward surface 211 and a plane perpendicular to the rotation axis b may also be smaller than 10 °.

In this embodiment, the front mesh enclosure 200 is a plastic mesh enclosure. Because the cost of the plastic mesh enclosure is lower, the weight is smaller, and the service life is longer. In one embodiment, the rear mesh 300 is a plastic mesh. In another embodiment, the rear mesh cap 300 may also be a metal mesh cap.

Through experimental tests, by adopting the front mesh enclosure 200 disclosed by the invention, the air volume can reach the air volume of a traditional metal mesh enclosure, is larger than that of a traditional plastic mesh enclosure, can reach the air volume test standard, and has the central air speed obviously higher than that of the traditional metal mesh enclosure and the traditional plastic mesh enclosure.

Net cover	Air volume (m3/min)	Central wind speed (m/min)
			Metal net	46	180
General plastic net	40	200
			The invention is adopted to cover	47.8	230

Referring to fig. 8, 9, 11 and 12, in an embodiment, the rear mesh cap 300 includes a rear mesh body 310, a first matching portion 320 and a clamping portion 330, and the first matching portion 320 is disposed at an edge of the rear mesh body 310. The front mesh enclosure 200 further includes a limiting portion 230 and a second engaging portion 240, the second engaging portion 240 and the limiting portion 230 are disposed at an outer edge of the second cover 220 at an interval along a radial direction of the second cover 220, the limiting portion 230 is formed with a limiting groove 231, the first engaging portion 320 can be disposed between the second engaging portion 240 and the limiting portion 230, and the retaining portion 330 is disposed at a side of the first engaging portion 320 facing the limiting portion 230, so that the retaining portion 330 can be retained in the limiting groove 231.

The rear mesh enclosure 300 is connected to the front mesh enclosure 200, so that the first engaging portion 320 of the rear mesh enclosure 300 is disposed between the second engaging portion 240 and the limiting portion 230, and the deformation of the first engaging portion 320 and the deformation of the second engaging portion 240 in the radial direction can be effectively limited by the engagement of the second engaging portion 240 with the limiting portion 230, so that the relative position relationship between the second engaging portion 240 and the second engaging portion 240 is slightly changed, and the stability of the engagement of the rear mesh enclosure 300 and the front mesh enclosure 200 in the radial direction is ensured. Meanwhile, the position-locking portion 330 of the rear mesh enclosure 300 is locked in the position-locking groove 231 of the position-locking portion 230, and the movement of the rear mesh enclosure 300 relative to the front mesh enclosure 200 in the axial direction and the circumferential direction can be further restricted by the locking of the position-locking groove 231 and the position-locking portion 330, thereby further ensuring the stability of the connection between the rear mesh enclosure 300 and the front mesh enclosure 200.

In another embodiment, the first matching portion 320 and the positioning portion 330 may be disposed at the outer edge of the second cover 220, and the second matching portion 240 and the limiting portion 230 are disposed at the edge of the rear net 310 of the rear net 300.

In one embodiment, the first engaging portion 320 is a ring-shaped structure, and the ring-shaped first engaging portion 320 is disposed around the edge of the rear net body 310. Specifically, an annular edge of the first fitting portion 320 is disposed at the edge of the rear net body 310, and the locking portion 330 is disposed on an inner annular surface or an outer annular surface of the first fitting portion 320.

In one embodiment, the second fitting portion 240 has a ring-shaped structure, and the ring-shaped second fitting portion 240 is disposed on the second connection ring 223. The position-limiting portion 230 is disposed on one side of the inner annular surface or one side of the outer annular surface of the second engaging portion 240.

In one embodiment, the number of the positioning portions 330 is at least two, and at least two positioning portions 330 are disposed on the first matching portion 320 at intervals around the circumference of the rear net body 310; the number of the position-limiting portions 230 is matched with the number of the positioning portions 330, and each positioning portion 330 can be correspondingly clamped in a position-limiting groove 231 of one of the position-limiting portions 230. For example, in the present embodiment, the number of the detent portions 330 is six. In other embodiments, the number of the locking portions 330 may be two, three, four, or other numbers.

Specifically, different positioning portions 330 are uniformly spaced around the circumference of the rear net body 310 to ensure the uniformity of the positioning portions 330 and the position-limiting portions 230.

Referring to fig. 9 and 12, in an embodiment, in the circumferential direction of the second cover 220, the distance between the position-limiting portion 230 and the second matching portion 240 tends to increase along a direction away from the position-limiting groove 231. When the assembly is performed, the positioning portion 330 is located at a position where the distance between the second matching portion 240 and the position-limiting portion 230 is larger, so that the first matching portion 320 and the positioning portion 330 can be inserted between the second matching portion 240 and the position-limiting portion 230, and the first matching portion 320 drives the positioning portion 330 to rotate toward the position-limiting groove 231, so that the positioning portion 330 can be gradually squeezed into the position-limiting groove 231 and inserted into the position-limiting groove 231.

Optionally, the distance between the limiting portion 230 and the second engaging portion 240 on one side of the limiting groove 231 gradually increases toward the direction away from the limiting groove 231. When the assembly is performed, the positioning portion 330 may be located at a position where the distance between the limiting portion 230 and the second matching portion 240 is larger, so that the first matching portion 320 and the positioning portion 330 can be stably inserted between the first matching portion 320 and the limiting portion 230.

In one embodiment, the position-limiting portion 230 is a plate-shaped structure, and the position-limiting portion 230 of the position-limiting portion with the position-limiting groove 231 is bent toward the second engaging portion 240, so that a distance between the position-limiting portion 230 with the position-limiting groove 231 and the second engaging portion 240 is smaller than a sum of thicknesses of the positioning portion 330 and the first engaging portion 320 in the radial direction. Because the first engaging portion 320 and the positioning portion 330 are disposed between the second engaging portion 240 and the positioning portion 230, when the positioning portion 330 moves to a position aligned with the positioning groove 231, the positioning portion 330 can effectively penetrate through the positioning groove 231, thereby ensuring the stability of the positioning portion 330 clamped in the positioning groove 231.

Referring to fig. 8, 10, 11 and 13, in an embodiment, the first matching portion 320 is provided with a first connection hole 340, and the first connection hole 340 and the positioning portion 330 are disposed at intervals along the circumferential direction of the rear net body 310. The second fitting portion 240 is provided with a second connecting hole 260, the second connecting hole 260 and the limiting portion 230 are arranged along the circumferential direction of the second cover 220 at intervals, and the second connecting hole 260 can be correspondingly communicated with the first connecting hole 340. When the installation, after the screens portion 330 is blocked in the limiting groove 231, so that the second connecting hole 260 is correspondingly communicated with the first connecting hole 340, and further the fastening screw is conveniently inserted into the first connecting hole 340 and the second connecting hole 260, and the first matching portion 320 is fixed on the second matching portion 240, so as to ensure the stability of the connection between the first matching portion 320 and the second matching portion 240.

Referring to fig. 10 and 13, in an embodiment, a guide groove 350 is disposed on a side of the first matching portion 320 facing the second matching portion 240, the first connection hole 340 is opened on a bottom wall of the guide groove 350, a guide portion 270 is disposed on a side of the second matching portion 240 facing the first matching portion 320, the second connection hole 260 is snapped on the guide portion 270, and the guide portion 270 can be inserted into the guide groove 350, so that the second connection hole 260 is correspondingly communicated with the first connection hole 340. When the positioning groove 132 is positioned in the position-limiting groove 231, the guiding portion 270 is positioned in the guiding groove 350. The stability of the connection of the first fitting portion 320 and the second fitting portion 240 can be further ensured by providing the fitting of the guide groove 350 and the guide portion 270.

Specifically, the guide groove 350 penetrates through the first fitting part 320 to form an insertion opening on a side opposite to the rear net body 310, and an inner wall of the guide groove 350 adjacent to the insertion opening is obliquely arranged to form a guide surface, and the guide surface is arranged towards the insertion opening. When the guide portion 270 can be inserted into the guide groove 350 through the insertion opening, the stability and efficiency of inserting the guide portion 270 into the guide groove 350 are improved by the guide surface.

In another embodiment, a guide portion 270 is disposed on a side of the first matching portion 320 facing the second matching portion 240, the first connection hole 340 is opened on the guide portion 270, a guide groove 350 is disposed on a side of the second matching portion 240 facing the first matching portion 320, the second connection hole 260 is opened on a bottom wall of the guide groove 350, and the guide portion 270 can be inserted into the guide groove 350, so that the second connection hole 260 and the first connection hole 340 are correspondingly communicated.

In an embodiment, the mesh enclosure assembly 10 further includes a supporting portion 360, a third connecting hole is formed on the supporting portion 360, the supporting portion 360 is disposed on a side of the first matching portion 320 facing away from the second matching portion 240 or the supporting portion 360 is disposed on a side of the second matching portion 240 facing away from the first matching portion 320, and the first connecting hole 340 and the second connecting hole 260 are correspondingly communicated with the third connecting hole. Since the first fitting portion 320 and the second fitting portion 240 have a small thickness in the radial direction, the support portion 360 can be provided for the fastening screw to support the fastening screw. In the present embodiment, the supporting portion 360 is integrally formed on the first matching portion 320.

Referring to fig. 1 and 14, in one embodiment, the mesh panel assembly 10 further includes a mounting member 400, wherein the mounting member 400 is mounted on a side of the rear mesh panel 300 facing away from the front mesh panel 200. The fan 10 further includes a driving member mounted on the mounting member 400, and the driving member is used for driving the fan blade 100 to rotate in the accommodating space.

Specifically, the mounting member 400 includes a first mounting portion 410 and a second mounting portion 420 disposed on the first mounting portion 410, and the second mounting portion 420 is provided with a driving hole 422. The rear mesh enclosure 300 is provided with a mounting hole 370, the first mounting portion 410 and the rear mesh enclosure 300 are provided with a clamping hook 430 on one, a clamping groove 380 is provided on the other, a first limiting structure 440 is provided on the second mounting portion 420, a second limiting structure 390 is provided on the inner wall of the mounting hole 370, the second mounting portion 420 is arranged in the mounting hole 370 in a penetrating manner, so that the second limiting structure 390 can be in limiting fit with the first limiting structure 440, and the clamping hook 430 is clamped in the clamping groove 380. The driving member is connected to the fan blade 100 through the driving hole 422.

In wearing to locate mounting hole 370 with the second installation department 420 of installed part 400, can make the spacing cooperation of first limit structure 440 and second limit structure 390, avoid second installation department 420 at the internal rotation of mounting hole 370, play the assembly and prevent slow-witted effect, improve the installation effectiveness. Simultaneously make first installation department 410 and back screen panel 300 pass through trip 430 and draw-in groove 380 card and establish, can further restrict the direction activity of installed part 400 to keeping away from back screen panel 300 for installed part 400 stably assembles on the back screen panel 300.

In one embodiment, the fan 10 is a floor fan. In other embodiments, the fan 10 may also be other types of fans 10 such as ceiling fans, table fans, wall fans, ceiling fans, air conditioning fans, and the like.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.