Mesh enclosure assembly and air supply equipment

Abstract

The invention discloses a mesh enclosure assembly and air supply equipment. The mesh enclosure assembly is used for being arranged on the air outlet side of a fan blade and comprises a positioning piece and a plurality of air guide pieces. The multiple air guiding pieces are arranged in the circumferential direction of the positioning piece at intervals, one ends of the air guiding pieces are connected with the positioning piece and extend in the direction away from the positioning piece, and an included angle is formed between the connecting line of the two ends of each air guiding piece and the radial direction of the positioning piece. The air guide piece is provided with a windward face, an air outlet face, a first air guide face and a second air guide face. The air guide part is intercepted based on a plane perpendicular to the extending direction of the air guide part to obtain a reference section, the first air guide face forms a first contour line on the reference section, and the second air guide face forms a second contour line on the reference section; the tangent line, close to the air outlet face, of the first contour line and the tangent line, close to the air outlet face, of the second contour line incline in the opposite direction of the rotating direction of the fan blades and form acute angles with a standard plane perpendicular to the center line of the positioning piece. According to the technical scheme, the wind gathering effect can be improved, and the wind speed is increased.

Description

Technical Field

[0001] This application relates to the technical field of air supply equipment, and particularly relates to a grille assembly and an air supply device. Background Art

[0002] Air supply equipment, such as fans, etc., is mainly used for directly blowing air for cooling or agitating air. Among them, the greater the wind speed of the air supply equipment when it blows out air, the better the blowing effect and the higher the degree of air agitation.

[0003] In the related art, an air outlet grille is provided on the air outlet side of the air supply equipment, and the wind speed is increased by changing the bending degree of the grille of the air outlet grille. However, currently, the design of the bending degree of the grille of the air outlet grille has a relatively small effect on increasing the wind speed and cannot meet the requirement of further increasing the wind speed. Summary of the Invention

[0004] The embodiments of this application provide a grille assembly and an air supply device, which can achieve the effect of improving wind gathering and increasing the wind speed.

[0005] In a first aspect, the grille assembly is used for being arranged on the air outlet side of the wind blade and includes:

[0006] A positioning member; and

[0007] A plurality of air guiding members, which are arranged at intervals along the circumferential direction of the positioning member. One end of the air guiding member is connected to the positioning member and extends in a direction away from the positioning member. The connection line between the end of the air guiding member away from the positioning member and the end of the air guiding member connected to the positioning member forms an angle with the radial direction of the positioning member;

[0008] Wherein, the air guiding member has a windward surface, an air outlet surface, a first air guiding surface and a second air guiding surface. The first air guiding surface and the second air guiding surface are arranged back to back and are both connected to the windward surface and the air outlet surface;

[0009] A reference cross-section is intercepted from the air guiding member based on a plane perpendicular to the extending direction of the air guiding member. The first air guiding surface forms a first contour line on the reference cross-section, the second air guiding surface forms a second contour line on the reference cross-section, the tangent line of the first contour line near the air outlet surface is the first tangent line, and the tangent line of the second contour line near the air outlet surface is the second tangent line;

[0010] Both the first tangent and the second tangent are inclined in the opposite direction to the rotation direction of the fan blade, and based on a standard plane perpendicular to the center line of the positioning member, an angle α between the first tangent and the standard plane is located on a side of the first contour line close to the second contour line, and an angle β between the second tangent and the standard plane is located on a side of the second contour line away from the first contour line, and both the angle α and the angle β are acute angles.

[0011] In one embodiment, at least a portion of the air guide member close to the air outlet surface is inclined in a direction opposite to a rotation direction of the fan blade.

[0012] In one embodiment, the angle α satisfies the relationship 55°≤α≤85°; and / or,

[0013] The angle β satisfies the relationship of 60°≤β≤88°.

[0014] In one embodiment, the angle α gradually decreases in a direction away from the positioning member; and / or,

[0015] The angle β gradually decreases in a direction away from the positioning member.

[0016] In one embodiment, the air guide member further comprises:

[0017] A transition surface is arranged close to the wind outlet surface, connects the wind outlet surface with the first wind guide surface and / or the second wind guide surface, and forms a transition profile on the reference section, wherein the transition profile connects the first contour line and / or the second contour line.

[0018] In one embodiment, the first contour line is a straight line, a plurality of broken lines or an arc line at least partially inclined in the opposite direction of the rotation direction of the fan blade; and / or the second contour line is a straight line, a plurality of broken lines or an arc line at least partially inclined in the opposite direction of the rotation direction of the fan blade;

[0019] Among them, based on the standard plane, the angle between the tangent of the first contour line close to the windward surface and the reference straight line is γ, and the angle γ is located on the side of the first contour line away from the second contour line, and the angle between the tangent of the second contour line close to the windward surface and the reference straight line is θ, and the angle θ is located on the side of the second contour line away from the first contour line.

[0020] In one embodiment, the angle γ is an acute angle, and the angle θ is an acute angle or a right angle.

[0021] In one embodiment, the angle γ is an acute angle, and the angle θ is an obtuse angle.

[0022] In one embodiment, the included angle γ is an obtuse angle or a right angle, and the included angle θ is an acute angle or a right angle.

[0023] In one embodiment, the air guiding member is arched along the rotation direction of the wind blade.

[0024] In one embodiment, the grille assembly further includes:

[0025] A mounting member, arranged around the positioning member, and two ends of the air guiding member are respectively connected to the positioning member and the mounting member.

[0026] In a second aspect, the air supply device includes:

[0027] A wind blade; and

[0028] The grille assembly as described in any one of the above, arranged on the air outlet side of the wind blade.

[0029] Based on the above embodiments, under the action of the wind blade, the flow direction of the air flow on the windward side is inclined outward away from the positioning member and diffuses toward the air guiding member. When the air flow passes through the air guiding member, since the first tangent line and the second tangent line are inclined in the opposite direction of the rotation direction of the wind blade, when the air flow flows out at the air outlet surface, under the guidance of the air guiding member, the air flow can have a flow component that converges inward, reducing diffusion and making the air flow tend to flow toward the center line of the positioning member. In this way, the plurality of air guiding members in the embodiments of the present application can achieve the effect of converging the air flow, reducing the diffusion of the air flow, improving the air gathering effect of the grille assembly, and thus increasing the wind speed of the whole machine. Moreover, when the converged air flows meet together, they will produce a further divergent effect, making the air supply distance of the air supply device farther and the air supply range larger.

[0030] In addition, due to the improvement of the air gathering effect of the grille assembly, it is not easy to generate turbulence between the multiple air flows flowing out between the plurality of air guiding members, so that the air flow flowing out through the grille assembly can be more uniform, thereby reducing the air flow resistance and reducing the noise of the air supply device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0032] Figure 1 It is a schematic structural diagram of an embodiment of the air supply device of the present application;

[0033] Figure 2 is Figure 1 the exploded schematic structural diagram of the air supply device in

[0034] Figure 3 Schematic diagram of the front structure of an embodiment of the fan head assembly of the present application;

[0035] Figure 4 is Figure 3 Schematic diagram of the structure at the A-A cross-section in

[0036] Figure 5 Schematic diagram of a reference cross-section of an embodiment of the air deflector of the present application;

[0037] Figure 6 Schematic diagram of the air flow direction of an embodiment of the air supply device of the present application;

[0038] Figure 7 Schematic diagram of a reference cross-section of another embodiment of the air deflector of the present application;

[0039] Figure 8 Schematic diagram of a reference cross-section of another embodiment of the air deflector of the present application;

[0040] Figure 9 Schematic diagram of a reference cross-section of yet another embodiment of the air deflector of the present application;

[0041] Figure 10 Schematic diagram of a reference cross-section of yet another embodiment of the air deflector of the present application;

[0042] Figure 11 Schematic diagram of a reference cross-section of yet another embodiment of the air deflector of the present application;

[0043] Figure 12 Schematic diagram of a reference cross-section of still another embodiment of the air deflector of the present application;

[0044] Figure 13 Schematic diagram of a reference cross-section of still another embodiment of the air deflector of the present application;

[0045] Figure 14 Schematic diagram of a reference cross-section of still another embodiment of the air deflector of the present application.

[0046] Explanation of the reference numerals in the drawings:

[0047] 1000, air supply device; 100, fan head assembly; 10, air inlet hood; 20, motor; 30, impeller; 40, grille assembly; 41, positioning member; 42, air deflector; 421, air outlet surface; 422, windward surface; 423, first air deflector surface; 424, second air deflector surface; 44, mounting member; 45, first contour line; 451, first tangent line; 46, second contour line; 461, second tangent line; 47, transition contour; 200, bracket assembly; 300, base assembly; P, standard plane.

[0048] The realization, functional features and advantages of the present application will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0049] To make the objectives, technical solutions and advantages of the present application clearer, the following will further describe in detail the embodiments of the present application with reference to the accompanying drawings.

[0050] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present application. On the contrary, they are merely examples of the devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0051] In the description of the present application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0053] Please refer to Figure 1 and Figure 2 , an embodiment of the present application provides a blowing device 1000 on the one hand. The blowing device 1000 is mainly used to directly blow air for cooling or stir the air, such as a fan. Exemplarily, divided according to the usage scenario, the blowing device 1000 can be a floor fan, a table fan, a ceiling fan, etc. In Figure 1 and Figure 2The air supply device 1000 shown is a form of implementation of a floor fan, and mainly includes a fan head assembly 100, a bracket assembly 200 and a base assembly 300. The base assembly 300 is used as a foundation for being placed on the ground, the bracket assembly 200 connects the base assembly 300 and the fan head assembly 100 to provide support for the fan head assembly 100, and the fan head assembly 100 is used to discharge air. In some embodiments, the fan head assembly 100 includes an air inlet cover 10, a motor 20, a fan blade 30 and a mesh cover assembly 40, the air inlet cover 10 is connected to the bracket assembly 200, the mesh cover assembly 40 is connected to the air inlet cover 10, the motor 20 and the fan blade 30 are arranged in the installation space formed between the mesh cover assembly 40 and the air inlet assembly, and the motor 20 is used to drive the fan blade 30 to rotate. When the fan blade 30 rotates, the air flow flows from the air inlet cover 10 to the mesh cover assembly 40, and finally flows out from the mesh cover assembly 40.

[0054] It is understandable that the greater the wind speed of the air supply device, the higher the blowing effect and the degree of air stirring. In the related art, the wind speed is increased by changing the curvature of the air outlet grille. However, at present, the design of the curvature of the air outlet grille has little effect on increasing the wind speed and cannot meet the demand for further increasing the wind speed.

[0055] To solve the above problems, the mesh cover assembly 40 proposed in another embodiment of the present application is improved as follows:

[0056] Combination Figures 2 to 4 The mesh cover assembly 40 has a windward side and a windward side. The windward side is the side of the mesh cover assembly 40 facing the fan blade 30, and the windward side is the side of the mesh cover assembly 40 facing away from the fan blade 30. The wind blown out by the fan blade 30 flows out from the windward side to the windward side. In the embodiment of the present application, the mesh cover assembly 40 includes a positioning member 41 and a plurality of wind guide members 42. The positioning member 41 is arranged at the center of the mesh cover assembly 40 and can be arranged in alignment with the rotation axis of the fan blade 30. The plurality of wind guide members 42 are arranged around the positioning member 41 to guide the airflow.

[0057] The air guide member 42 may be strip-shaped, one end of which is connected to the positioning member 41, and the other end of which extends away from the positioning member 41. The positioning member 41 is roughly circular, and the line connecting the end of the air guide member 42 away from the positioning member 41 and the end of the air guide member 42 connected to the positioning member 41 is arranged at an angle to the radial direction of the positioning member 41. That is, the general extension direction of the air guide member 42 deviates from the radial direction of the positioning member 41. For example, the air guide member 42 is arched clockwise or counterclockwise along the circumference of the mesh cover assembly 40, and the arching direction of the air guide member 42 is the same as the rotation direction of the fan blade 30. For example, in Figure 3In the illustrated embodiment, the wind blade 30 rotates clockwise. Correspondingly, the air guiding member 42 arches clockwise along the circumferential direction of the grille assembly 40. Thus, the air flow channels formed between the plurality of air guiding members 42 can better match the air flow generated by the rotation of the wind blade 30, reduce the air resistance of the grille assembly 40 to the air flow, facilitate increasing the air outlet speed, and reduce the aerodynamic noise. Of course, in some other embodiments, the air guiding member 42 may also extend linearly relative to the radial direction of the positioning member 41, which is not limited herein.

[0058] For ease of description, in combination with Figures 3 to 5 , a reference cross-section is obtained by intercepting the air guiding member 42 based on a plane perpendicular to the extending direction of the air guiding member 42. It can be understood that in the extending direction of the air guiding member 42, the position and angle of the reference cross-section are constantly changing and always maintain a perpendicular relationship with the extending direction of the air guiding member 42. On the plane where the reference cross-section is located, since the extending direction of the air guiding member 42 is different from the radial direction of the positioning member 41, for a specific air guiding member 42, the projection of the positioning member 41 on this plane can always be located on one side of the reference cross-section of the air guiding member 42. For example, in the illustrated embodiment, the positioning member 41 is located on the right side of the reference cross-section of the air guiding member 42, and the air flow direction blown by the wind blade 30 obliquely flows towards the air guiding member 42 and has a component away from the air guiding member 42 towards the left, and the air flow has a tendency to diffuse towards the outer side away from the positioning member 41.

[0059] In combination with Figure 5 , Figure 7 and Figure 8 , the air guiding member 42 specifically has a windward surface 422, an air outlet surface 421, a first air guiding surface 423, and a second air guiding surface 424. The windward surface 422 faces the windward side, the air outlet surface 421 faces the air outlet side, the first air guiding surface 423 and the second air guiding surface 424 are arranged back to back and connect the windward surface 422 and the air outlet surface 421. It can be understood that an air flow channel is formed between the first air guiding surface 423 and the previous air guiding member 42, and an air flow channel is formed between the second air guiding surface 424 and the next air guiding member 42, and the air flow flows out through the windward surface 422, the first air guiding surface 423 (the second air guiding surface 424), and the air outlet surface 421. Among them, the windward surface 422 and the air outlet surface 421 can be a plane or an arc surface, which is not limited herein.

[0060] In the embodiment of the present application, the first air guiding surface 423 forms a first contour line 45 on the reference cross-section, and the second air guiding surface 424 forms a second contour line 46 on the reference cross-section. The tangent line of the first contour line 45 near the air outlet surface 421 is referred to as the first tangent line 451, and the second tangent line 461 is referred to as the second tangent line 461. Both the first tangent line 451 and the second tangent line 461 are inclined in the opposite direction of the rotation direction of the wind blade 30.

[0061] Exemplarily, as Figures 3 to 5As shown, the wind blade 30 rotates in the clockwise direction, and the first tangent line 451 and the second tangent line 461 on the reference section of the air guide member 42 are inclined approximately in the counterclockwise direction. Figure 4 The following figure shows a schematic structural view of the wind blade 30 and the mesh cover assembly 40 in the A-A section. It can be seen that for a determined reference section, the rotation direction of the wind blade 30 faces the side along the first air guide surface and the second air guide surface in the reference section. Combining Figure 5 , the rotation direction of the wind blade 30 faces the left side of the reference section, and both the first tangent line 451 and the second tangent line 461 face the reverse direction of the rotation direction of the wind blade 30, that is, they are inclined to the right side.

[0062] The positioning member 41 has a straight line passing through its own geometric center and perpendicular to the tangent plane of the geometric center of the positioning member 41. In some embodiments, the positioning member 41 is presented as a circle, and its center line is the straight line passing through the center of the positioning member 41. Optionally, the center line of the positioning member 41 generally passes through the center of the fan head assembly 100. For the convenience of description, a standard plane P perpendicular to the center line of the positioning member 41 is given. The included angle between the first tangent line 451 and the standard plane P is α, and the included angle α is located on the side where the first contour line 45 is close to the second contour line 46. The included angle between the second tangent line 461 and the standard plane P is β, and the included angle β is located on the side where the second contour line 46 is far from the first contour line 45. Among them, both the included angle α and the included angle β are acute angles, that is, it is ensured that both the first tangent line 451 and the second tangent line 461 are Figure 5 inclined to the right side in, that is, the reverse direction of the rotation direction of the wind blade 30. Among them, the magnitudes of the included angle α and the included angle β may be the same or different, and the embodiments of the present application do not limit this.

[0063] It can be understood that when the air flow reaches the air outlet surface 421, the air flows beside the first air guide surface 423 and the second air guide surface 424 will flow along the tangent lines of the first air guide surface 423 and the second air guide surface 424 respectively. That is to say, on the determined reference section, the first tangent line 451 and the second tangent line 461 characterize the flow direction of the air flow at the air outlet surface 421.

[0064] In the embodiment of the present application, under the action of the wind blade 30, the flow direction of the air flow on the windward side is obliquely diffused outward away from the positioning member 41 and guided to the air guiding member 42. When the air flow passes through the air guiding member 42, since the first tangent line 451 and the second tangent line 461 are inclined in the opposite direction of the rotation direction of the wind blade 30, when the air flow flows out at the air outlet surface 421, it can have a flow component that converges inward under the guidance of the air guiding member 42, reducing diffusion and making the air flow tend to flow toward the center line of the positioning member 41. Thus, the plurality of air guiding members 42 in the embodiment of the present application can achieve the effect of converging the air flow, reduce the diffusion of the air flow, improve the air gathering effect of the mesh cover assembly 40, and thereby increase the wind speed of the whole machine. Moreover, when the converged air flows meet together, they will produce a further divergent effect, making the air supply distance of the air supply device 1000 farther and the air supply range larger.

[0065] In addition, in combination with Figure 6 , since the air gathering effect of the mesh cover assembly 40 is improved, it is not easy to generate turbulence between the multiple air flows flowing out between the plurality of air guiding members 42, so that the air flow flowing out through the mesh cover assembly 40 can be more uniform, thereby reducing the air flow resistance and reducing the noise of the air supply device 1000.

[0066] In combination with Figure 5 , in some specific embodiments, both the first contour line 45 and the second contour line 46 are continuous lines, so as to continuously guide the air flow, ensure the smooth flow of the air flow and maintain the air flow direction.

[0067] In combination with Figure 7 and Figure 8, in some other embodiments, there is also a case where a transition surface is provided between at least one of the first air guiding surface 423 and the second air guiding surface 424 and the air outlet surface 421. Exemplarily, the transition surface is provided between the second air guiding surface 424 and the air outlet surface 421 to form a transition between the second air guiding surface 424 and the air outlet surface 421, and a transition contour 47 connected to one end of the second contour line 46 close to the air outlet surface 421 is formed on the reference section. In this example, during actual production, the air guiding member 42 is a plastic part produced by an injection molding process, and the transition surface can be a necessary demolding section during the production process; alternatively, the transition surface can also be an arc chamfer to facilitate production and avoid easy damage to the edge of the air guiding member 42, and reduce or avoid the harm of the edge of the air guiding member 42 to the human hand. In short, in these embodiments, it is still the tangent of the end of the second contour line 46 rather than the transition contour 47 close to the air outlet surface 421 that is inclined towards the positioning member 41. That is to say, in fact, the second contour line 46 or rather the second air guiding surface 424 plays a major role in the flow direction of the air flow. By defining that the tangent of the end of the second contour line 46 close to the air outlet surface 421 is inclined towards the positioning member 41, the flow direction of the air flow at the air outlet surface 421 can be ensured, and the gathering effect of the mesh cover assembly 40 can be ensured. The shape of the transition surface does not affect the effect of the second air guiding surface 424 on the air flow.

[0068] Of course, the transition surface can also be provided between the first air guiding surface 423 and the air outlet surface 421, which will not be elaborated here.

[0069] As Figure 8 shown, it can also be that transition surfaces are provided between the first air guiding surface 423 and the air outlet surface 421, and between the second air guiding surface 424 and the air outlet surface 421. Exemplarily, both transition surfaces are arc chamfers, and both transition contours 47 are arcs connecting the contour of the air outlet surface 421 to facilitate production and avoid easy damage to the edge of the air guiding member 42, and reduce or avoid the harm of the edge of the air guiding member 42 to the human hand, as well as improve the coordination and aesthetics of the air guiding member 42. Of course, in these embodiments, the first air guiding surface 423 and the second air guiding surface 424 play a major role in the flow direction of the air flow. The tangents of the ends of the first contour line 45 and the second contour line 46 close to the air outlet surface 421 are inclined towards the positioning member 41, which can ensure the flow direction of the air flow at the air outlet surface 421 and the gathering effect of the mesh cover assembly 40.

[0070] In some embodiments, the included angle α satisfies the relation 55° ≤ α ≤ 85°. It can be understood that if the included angle α is less than 55°, it indicates that the included angle between the first tangent line 451 and the standard plane P is too small, which is likely to obstruct the outflow of the air flow at the air outlet surface 421, causing poor air flow, increasing the air flow resistance, affecting the wind speed, and easily increasing the noise level; if the included angle α is greater than 85°, the air guiding member 42 cannot effectively guide the air flow in the direction towards the center line of the positioning member 41, affecting the air gathering effect of the mesh cover assembly 40, and thus affecting the wind speed. Therefore, in order to ensure the air gathering effect of the mesh cover assembly 40 and avoid obstructing the air flow at the same time, the embodiments of the present application define that the included angle α satisfies the relation 55° ≤ α ≤ 85°, and α can be selected as 60°, 70°, 75°, 80°, etc.

[0071] Or the included angle β satisfies the relation 60° ≤ β ≤ 88°. It can be understood that if the included angle β is less than 60°, it indicates that the included angle between the second tangent line 461 and the standard plane P is too small, which is likely to obstruct the outflow of the air flow at the air outlet surface 421, causing poor air flow, increasing the air flow resistance, affecting the wind speed, and easily increasing the noise level; if the included angle β is greater than 88°, the air guiding member 42 cannot effectively guide the air flow in the direction towards the center line of the positioning member 41, affecting the air gathering effect of the mesh cover assembly 40, and thus affecting the wind speed. Therefore, in order to ensure the air gathering effect of the mesh cover assembly 40 and avoid obstructing the air flow at the same time, the embodiments of the present application define that the included angle β satisfies the relation 60° ≤ β ≤ 88°, and β can be selected as 70°, 75°, 80°, etc.

[0072] Of course, it can also be that while the included angle α satisfies the relation 55° ≤ α ≤ 85°, the included angle β satisfies the relation 60° ≤ β ≤ 88° to further ensure the air gathering effect of the mesh cover assembly 40, and at the same time ensure smooth air flow, reduce the air flow resistance and reduce the noise level.

[0073] Furthermore, in some embodiments, along the direction away from the positioning member 41, the included angle α gradually decreases. It can be understood that for some wind blades 30, the farther away from the positioning member 41, the greater the air volume and the greater the tendency of the air flow to diffuse. Therefore, in this solution, the air guiding member 42 with a variable cross-section is adopted. The smaller the included angle α, the stronger the air gathering effect of the air guiding member 42, so that the air flow on the outer circle of the mesh cover assembly 40 can be gathered faster, improving the air gathering effect and the wind speed. Or, along the direction away from the positioning member 41, the included angle β gradually decreases. The smaller the included angle β, the stronger the air gathering effect of the air guiding member 42, improving the air gathering effect. Further, along the direction away from the positioning member 41, while the included angle α gradually decreases, the included angle β also gradually decreases to further enhance the air gathering effect and effectively increase the wind speed.

[0074] In the embodiment of the present application, along the direction from the windward surface 422 to the wind outlet surface 421, the air guide 42 may be partially tilted in the opposite direction of the rotation direction of the fan blade 30, or may be tilted in the opposite direction of the rotation direction of the fan blade 30 as a whole, so that when the airflow flows through the air guide 42, it can be guided to achieve the wind gathering effect. Optionally, at least the part of the air guide 42 close to the wind outlet surface 421 is tilted in the opposite direction of the rotation direction of the fan blade 30, so that the first air guide surface 423 and the second air guide surface 424 close to the wind outlet surface 421 are tilted in the opposite direction of the rotation direction of the fan blade 30, so as to ensure that the first tangent line 451 and the second tangent line 461 are both tilted toward the positioning member 41, so as to ensure that the airflow has an inward gathering direction when it flows out from the wind outlet surface 421, so as to ensure the wind gathering effect of the net cover assembly 40 and increase the wind speed.

[0075] Combination Figures 9 to 11 In some embodiments, the first contour line 45 is a straight line, a multi-segment fold line or an arc line that at least partially extends in an inclination in the opposite direction of the rotation direction of the fan blade 30, and accordingly, the first wind guide surface 423 is an inclined plane, a surface structure formed by splicing multiple planes, or an arc surface. Alternatively, the second contour line 46 is a straight line, a multi-segment fold line or an arc line that at least partially extends in an inclination in the opposite direction of the rotation direction of the fan blade 30, and accordingly, the second wind guide surface 424 is an inclined plane, a surface structure formed by splicing multiple planes, or an arc surface.

[0076] That is to say, the embodiment of the present application does not limit the shapes of the first wind guide surface 423 and the second wind guide surface 424 . The shapes of the first wind guide surface 423 and the second wind guide surface 424 can be arbitrarily combined in the above options to provide a diverse mesh cover assembly 40 .

[0077] The following are some possible situations of the first air guide surface 423 and the second air guide surface 424 of the mesh cover assembly 40 as specifically described by examples:

[0078] like Figures 9 to 11 In one embodiment, based on the standard plane P, the angle between the tangent line of the first contour line 45 close to the windward surface 422 and the standard plane P is γ, and the angle γ is located on the side of the first contour line 45 away from the second contour line 46, and the angle between the tangent line of the second contour line 46 close to the windward surface 422 and the standard plane P is θ, and the angle θ is located on the side of the second contour line 46 away from the first contour line 45;

[0079] Among them, the included angle γ is an acute angle, and the included angle θ is an acute angle or a right angle. The included angle γ reflects the extending direction of the first contour line 45. The fact that the included angle γ is an acute angle indicates that the first contour line 45 extends towards the second contour line 46. Similarly, the fact that the included angle θ is an acute angle indicates that the second contour line 46 extends towards the direction close to the first contour line 45, and the fact that the included angle θ is a right angle indicates that the second contour line 46 is perpendicular to the plane where the air guiding member 42 is located at the windward surface 422. As shown in the figure, when the included angle γ is an acute angle and the included angle θ is an acute angle or a right angle, the part of the air guiding member 42 close to the windward surface 422 can be bent towards the direction of the oncoming air flow, thereby reducing the resistance of the air flow flowing to the first air guiding surface 423 and the second air guiding surface 424 at the windward surface 422, facilitating the guiding of the air flow, and reducing noise. At the same time, when the included angle θ is an acute angle or a right angle, the bending degree of the air guiding member 42 can be weakened, which is convenient for production and manufacturing.

[0080] Exemplarily, in Figure 11 the illustrated embodiment, both the first contour line 45 and the second contour line 46 are arched arcs along the rotation direction of the wind blade 30, enabling the windward surface 422 to smoothly transition to the air outlet surface 421, improving the air flow stability, and making the air flow smoother.

[0081] Of course, in some other embodiments, such as Figure 9 and Figure 10 , the first contour line 45 can be an arc, and the second contour line 46 can be a straight line or a multi-segment broken line.

[0082] Such as Figure 12 , in another embodiment, the included angle γ is an acute angle, and the included angle θ is an obtuse angle. When the included angle θ is an obtuse angle, the second contour line 46 extends away from the first contour line 45, and the curvature of the second contour line 46 near the windward surface 422 is greater, which can cause the windward surface 422 to fit the air flow more closely, further reducing the air flow resistance and improving the smoothness of the air inlet.

[0083] Optionally, in Figure 12 the illustrated embodiment, both the first contour line 45 and the second contour line 46 are arched arcs along the rotation direction of the wind blade 30, further enabling the windward surface 422 to smoothly transition to the air outlet surface 421, improving the air flow stability, and making the air flow smoother.

[0084] Such as Figure 5 , Figure 13 and Figure 14 , in some other possible embodiments, the included angle γ can also be an obtuse angle or a right angle, and the included angle θ is an acute angle or a right angle. For example, as shown in Figure 5 , the first air guiding surface 423 is an arc surface, the second air guiding surface 424 is a plane, the first contour line 45 is an arc in the reference section, the second contour line 46 is a straight line, and the air guiding member 42 is inclined towards the positioning member 41 as a whole; or as shown in Figure 13As shown, the first air guiding surface 423 is an arc surface, and the second air guiding surface 424 is formed by connecting multiple flat surfaces in a bent manner. In the reference cross-section, the first contour line 45 is an arc line, and the second contour line 46 is a multi-segment straight line; or as Figure 14 shown, the first air guiding surface 423 is an arc surface, and the second air guiding surface 424 is also an arc surface. In the reference cross-section, both the first contour line 45 and the second contour line 46 are arc lines.

[0085] Please refer to again Figure 3 , in an embodiment, the mesh cover assembly 40 further includes a mounting member 44, and the mounting member 44 is used to connect the air inlet cover 10. Optionally, the mounting member 44 is arranged in a ring shape and surrounds the positioning member 41. There is a gap between the mounting member 44 and the positioning member 41, and both ends of the air guiding member 42 are respectively connected to the positioning member 41 and the mounting member 44. So that the air blown out by the fan blade 30 can flow out between the mounting member 44 and the positioning member 41. The positioning member 41 can define the air flow area while supporting the mesh cover assembly 40 and protecting the internal motor 20, fan blade 30 and other structures, improving the stability of the fan head assembly 100.

[0086] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0087] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A mesh cover assembly, used to be arranged on the wind outlet side of a fan blade, characterized in that: include: Positioning parts; and A plurality of air guides are arranged at intervals along the circumference of the positioning member, one end of the air guide is connected to the positioning member and extends in a direction away from the positioning member, and a line connecting the end of the air guide away from the positioning member and the end of the air guide connected to the positioning member is arranged at an angle to the radial direction of the positioning member; Wherein, the wind guide member has a windward surface, a wind outlet surface, a first wind guide surface and a second wind guide surface, and the first wind guide surface and the second wind guide surface are arranged opposite to each other and are both connected to the windward surface and the wind outlet surface; The air guide member is cut off based on a plane perpendicular to the extension direction of the air guide member to obtain a reference cross section, the first air guide surface forms a first contour line on the reference cross section, the second air guide surface forms a second contour line on the reference cross section, a tangent line of the first contour line close to the air outlet surface is a first tangent line, and a tangent line of the second contour line close to the air outlet surface is a second tangent line; Both the first tangent and the second tangent are inclined in the opposite direction to the rotation direction of the fan blade, and based on a standard plane perpendicular to the center line of the positioning member, an angle α between the first tangent and the standard plane is located on a side of the first contour line close to the second contour line, and an angle β between the second tangent and the standard plane is located on a side of the second contour line away from the first contour line, and both the angle α and the angle β are acute angles.

2. The mesh cover assembly according to claim 1, characterized in that: At least a portion of the air guide member close to the air outlet surface is inclined in a direction opposite to the rotation direction of the fan blade.

3. The mesh cover assembly according to claim 1, characterized in that: The angle α satisfies the relationship 55°≤α≤85°; and / or, The angle β satisfies the relationship of 60°≤β≤88°.

4. The mesh cover assembly according to claim 1, wherein: In the direction away from the positioning member, the angle α gradually decreases; and / or, The angle β gradually decreases in a direction away from the positioning member.

5. The mesh cover assembly according to claim 1, wherein: The air guide member also has: A transition surface is arranged close to the wind outlet surface, connects the wind outlet surface with the first wind guide surface and / or the second wind guide surface, and forms a transition profile on the reference section, wherein the transition profile connects the first contour line and / or the second contour line.

6. The mesh cover assembly according to claim 1, wherein: The first contour line is a straight line, a plurality of broken lines or an arc line which is at least partially inclined in the opposite direction of the rotation direction of the fan blade; and / or the second contour line is a straight line, a plurality of broken lines or an arc line which is at least partially inclined in the opposite direction of the rotation direction of the fan blade; Among them, based on the standard plane, the angle between the tangent of the first contour line close to the windward surface and the reference straight line is γ, and the angle γ is located on the side of the first contour line away from the second contour line, and the angle between the tangent of the second contour line close to the windward surface and the reference straight line is θ, and the angle θ is located on the side of the second contour line away from the first contour line.

7. The mesh cover assembly according to claim 6, characterized in that: The angle γ is an acute angle, and the angle θ is an acute angle or a right angle.

8. The mesh cover assembly according to claim 6, wherein: The angle γ is an acute angle, and the angle θ is an obtuse angle.

9. The mesh cover assembly according to claim 6, characterized in that: The angle γ is an obtuse angle or a right angle, and the angle θ is an acute angle or a right angle.

10. The mesh cover assembly according to claim 1, wherein: The wind guide member is arranged to be arched along the rotation direction of the fan blade.

11. The mesh cover assembly according to any one of claims 1 to 10, characterized in that: Also includes: The mounting member is arranged around the positioning member, and two ends of the air guide member are respectively connected to the positioning member and the mounting member.

12. An air supply device, characterized in that: include: wind blade; and The mesh cover assembly according to any one of claims 1 to 11 is arranged on the air outlet side of the fan blade.

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