Front mesh enclosure and fan

Abstract

The utility model relates to a front mesh enclosure and a fan. The front mesh enclosure comprises a plurality of first air guide strips, all the first air guide strips are circumferentially distributed around the axis of the front mesh enclosure, and each first air guide strip is bent in the direction opposite to the rotating direction of the fan blades; the windward side of each first air guide strip is provided with a first inclined face, the leeward side of each first air guide strip is provided with a second inclined face, and the first inclined faces and the second inclined faces are oppositely arranged and incline towards the direction close to each other in the air outlet direction. Due to the fact that the first air guide strips are bent in the direction opposite to the rotating direction of the fan blades, airflow can be gathered, and the effects of concentrating the air direction and increasing the air supply distance are achieved. Moreover, the first inclined surface and the second inclined surface which are oppositely arranged are obliquely arranged in the direction close to each other along the air outlet direction, so that the air volume can be further concentrated, the turbulent flow is reduced, the air volume loss is reduced, and the air feeling and continuity of air supply are improved.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to front grilles and fans. Background Technology

[0002] Existing fan air supply devices generally use a combination of fan blades and a mesh cover. Due to the high cost of metal mesh covers, they are gradually being replaced by plastic mesh covers. However, compared with metal mesh covers, plastic mesh covers have greater wind resistance and greater air volume loss, resulting in problems such as fan airflow dispersion, poor airflow feel, and inconsistent air supply. Utility Model Content

[0003] Therefore, it is necessary to provide a front grille and fan to address the problems of airflow dispersion, poor airflow feel, and inconsistent air delivery in existing fans.

[0004] In one aspect of this application, a front grille is provided, including a plurality of first air guide strips, all of which are circumferentially distributed around the axis of the front grille, and each first air guide strip is bent in a direction opposite to the rotation direction of the fan blades.

[0005] Each first air guide strip has a first inclined surface on its windward side and a second inclined surface on its leeward side. The first and second inclined surfaces are arranged opposite to each other, and both are inclined towards each other along the air outlet direction.

[0006] The aforementioned front grille, because the first air guide strip is bent in the opposite direction to the rotation direction of the fan blades, can concentrate the airflow, thereby concentrating the airflow and increasing the air delivery distance. Furthermore, because the first and second inclined surfaces, which are arranged opposite each other, are inclined towards each other in the direction of airflow, the air volume can be further concentrated, turbulence can be reduced, air volume loss can be reduced, and the feel and continuity of the air delivery can be improved.

[0007] In one embodiment, the inclination angle of the first inclined plane is α1, 0° < α1 < 60°; and / or

[0008] The inclination angle of the second inclined plane is α2, where 0° < α2 < 60°.

[0009] When the inclination angle α1 of the first inclined plane is in the range of 0° < α1 < 60° and the inclination angle α1 of the second inclined plane is in the range of 0° < α1 < 60°, the air volume can be concentrated over a larger range, reducing turbulence, reducing air volume loss, and improving the feel and continuity of the air supply.

[0010] In one embodiment, each first air guide strip further has a third inclined surface on its windward side. The third inclined surface is located upstream of the first inclined surface along the air outlet direction and slopes towards the leeward side of the first air guide strip in a direction opposite to the air outlet direction; and / or

[0011] Each of the first air guide strips also has a fourth inclined surface on its leeward side. The fourth inclined surface is located upstream of the second inclined surface along the air outlet direction and is inclined towards the windward side of the first air guide strip in the opposite direction to the air outlet direction.

[0012] Because the airflow from the fan blades first passes through the third inclined plane, and the third inclined plane is tilted towards the leeward side of the first guide vane in the opposite direction to the airflow direction, the airflow from the fan blades can be converged over a large area by the third inclined plane before the airflow is concentrated on the first inclined plane, thereby guiding a large amount of airflow to gather on the first inclined plane and further concentrating the airflow. Similarly, because the airflow from the fan blades first passes through the fourth inclined plane, and the fourth inclined plane is tilted towards the windward side of the first guide vane in the opposite direction to the airflow direction, the airflow from the fan blades can be converged over a large area by the fourth inclined plane before the airflow is concentrated on the second inclined plane 12, thereby guiding a large amount of airflow to gather on the second inclined plane and further concentrating the airflow.

[0013] In one embodiment, the angle between the third inclined plane and the fourth inclined plane is β, where 0° < β < 90°.

[0014] When the angle β between the third and fourth inclined planes is in the range of 0° < β < 90°, the airflow from the fan blades can be concentrated inward, improving the effect of concentrated air volume. In addition, it can also further reduce wind resistance.

[0015] In one embodiment, the front grille further includes a plurality of second air guides, all of which are located around all of the first air guides. All of the second air guides are circumferentially distributed around the axis of the front grille, and each second air guide is bent in the same direction as the rotation direction of the fan blades.

[0016] Because the second air guide is bent in the same direction as the fan blades, it can spread the airflow, thereby making the blowing coverage area larger.

[0017] In one embodiment, each second air guide strip has a fifth inclined surface on its leeward side, the fifth inclined surface being inclined toward the windward side of the second air guide strip along the air outlet direction.

[0018] Since the fifth inclined surface is tilted towards the windward side along the air outlet direction, it can work together with the first and second inclined surfaces to further concentrate the air volume, reduce turbulence, reduce air volume loss, and improve the feel and continuity of the air supply.

[0019] In one embodiment, the inclination angle of the fifth inclined plane is α3, where 0° < α3 < 60°.

[0020] When the inclination angle α3 of the fifth inclined plane is in the range of 0°<α3<60°, it can concentrate the air volume over a larger range, reduce turbulence, reduce air volume loss, and improve the feel and continuity of the air supply.

[0021] In one embodiment, the leeward side of each second air guide strip also has a first arc surface, which is located upstream of the fifth inclined surface along the air outlet direction.

[0022] By setting the first curved surface, wind resistance can be reduced and operating noise can be lowered.

[0023] In one embodiment, each second air guide strip also has a second arc surface on its windward side.

[0024] Compared to setting the windward side of the second air guide strip as an inclined surface, setting a second arc surface can increase the air guiding area and better guide the wind direction.

[0025] In one embodiment, each second air guide has a first end close to the first air guide and a second end opposite to the first end; along the rotation direction of the fan blade, the tilt angle of the second air guide relative to the horizontal plane gradually increases from the first end to the second end.

[0026] Since the bending direction of the second air guide is the same as the rotation direction of the fan blade, as the tilt angle of the second air guide relative to the horizontal plane gradually increases from the first end to the second end, the airflow can be dispersed, the airflow path becomes larger, and the air volume also increases, effectively reducing wind resistance and operating noise.

[0027] In another aspect of this application, a fan is also provided, including the front grille in any of the above embodiments.

[0028] The aforementioned fan, because its first guide vane bends in the opposite direction to the rotation of the fan blades, can concentrate the airflow, thereby concentrating the airflow and increasing the delivery distance. Furthermore, because the first and second inclined surfaces, which are positioned opposite each other, are tilted closer to each other along the airflow direction, the airflow can be further concentrated, turbulence reduced, airflow loss decreased, and the feel and continuity of the airflow improved. Attached Figure Description

[0029] Figure 1 This is a front view of the front mesh cover in one or more embodiments of this application.

[0030] Figure 2 for Figure 1 The diagram shows the AA cross-sectional structure of the front grille.

[0031] Figure 3 for Figure 2 The cross-sectional view of the first air guide strip of the front grille shown.

[0032] Figure 4 for Figure 1 The diagram shows a partial structural diagram of the front grille.

[0033] Figure 5 for Figure 1 The diagram shows a BB cross-sectional structure of the front grille.

[0034] Figure 6 for Figure 5 The cross-sectional view of the second air guide strip of the front grille shown. Attached image description:

[0036] Front mesh cover 100, first air guide strip 10, first inclined surface 11, second inclined surface 12, third inclined surface 13, fourth inclined surface 14, first end face 15, second end face 16, second air guide strip 20, fifth inclined surface 21, first arc surface 22, second arc surface 23, third end face 24, fourth end face 25, annular connecting strip 30, first straight line L1, second straight line L2. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0043] Figure 1 A front view of the front mesh cover according to an embodiment of this application is shown. Figure 2 for Figure 1 The diagram shown is a cross-sectional view of the front grille. Figure 3 for Figure 2 A cross-sectional view of the first air guide strip of the front grille is shown. (See also...) Figures 1-3 An embodiment of this application provides a front grille 100 including a plurality of first air guide strips 10. All the first air guide strips 10 are circumferentially distributed around the axis of the front grille 100, and each first air guide strip 10 is bent in a direction opposite to the rotation direction of the fan blades. Each first air guide strip 10 has a first inclined surface 11 on its windward side and a second inclined surface 12 on its leeward side. The first inclined surface 11 and the second inclined surface 12 are arranged opposite to each other, and both are inclined towards each other along the air outlet direction A.

[0044] The definitions of "windward side" and "leeward side" used in this document are relative to the direction of airflow. The side facing the direction of airflow is the "windward side," and the side away from the direction of airflow is the "leeward side." Specifically, the fan blades in this embodiment rotate clockwise. Therefore, referring to the figure, the left side of the cross-sectional view of the first air guide 10 is the leeward side, and the right side is the windward side.

[0045] The first air guide strip 10 is a rib that can guide the airflow direction. All the first air guide strips 10 can be evenly distributed around the axis of the front mesh cover 100.

[0046] Because the first guide vane 10 bends in the opposite direction to the rotation of the fan blades, it can concentrate the airflow, thereby concentrating the airflow and increasing the air delivery distance. Furthermore, because the first inclined surface 11 and the second inclined surface 12, which are arranged opposite each other, are inclined towards each other in the air outlet direction A, the air volume can be further concentrated, turbulence can be reduced, air volume loss can be reduced, and the feel and continuity of the air delivery can be improved.

[0047] In some embodiments, the inclination angle of the first inclined surface 11 is α1, where 0° < α1 < 60°.

[0048] It should be noted that the inclination angle α1 of the first inclined surface 11 refers to the angle between the first inclined surface 11 and the first straight line L1 on the cross section of the first air guide 10, wherein the first straight line L1 is parallel to the axis of the front mesh cover 100.

[0049] When the tilt angle α1 of the first inclined plane 11 is in the range of 0° < α1 < 60°, it can concentrate the air volume over a larger range, reduce turbulence, reduce air volume loss, and improve the feel and continuity of the air supply.

[0050] Optionally, 0°<α1≤10°.

[0051] In some embodiments, the inclination angle of the second inclined plane 12 is α2, where 0° < α2 < 60°.

[0052] Similarly, the inclination angle α2 of the second inclined surface 12 refers to the angle between the second inclined surface 12 and the first straight line L1 on the cross section of the first air guide 10, wherein the first straight line L1 is parallel to the axis of the front mesh cover 100.

[0053] When the tilt angle α2 of the second inclined plane 12 is in the range of 0° < α2 < 60°, it can concentrate the air volume over a larger range, reduce turbulence, reduce air volume loss, and improve the feel and continuity of the air supply.

[0054] Optionally, 0°<α2≤10°.

[0055] In some embodiments, 0° < α1 < 60°, and 0° < α1 < 60°. Thus, the first inclined plane 11 and the second inclined plane 12 can simultaneously guide airflow to be delivered and converged over a large area, achieving large-scale centralized air delivery.

[0056] In some embodiments, each first air guide strip 10 has a third inclined surface 13 on its windward side. The third inclined surface 13 is located upstream of the first inclined surface 11 along the air outlet direction A and is inclined towards the leeward side of the first air guide strip 10 in a direction opposite to the air outlet direction A.

[0057] Since the airflow from the fan blades passes through the third inclined surface 13 first, and the third inclined surface 13 is inclined towards the leeward side of the first guide strip 10 in the opposite direction to the airflow direction A, the airflow from the fan blades can be gathered over a large area through the third inclined surface 13 before the airflow is gathered on the first inclined surface 11, thereby guiding a large amount of airflow to gather on the first inclined surface 11 and further concentrating the air volume.

[0058] In some embodiments, each first air guide strip 10 has a fourth inclined surface 14 on its leeward side. The fourth inclined surface 14 is located upstream of the second inclined surface 12 along the air outlet direction A and is inclined toward the windward side of the first air guide strip 10 in a direction opposite to the air outlet direction A.

[0059] Similarly, since the airflow from the fan blades passes through the fourth inclined surface 14 first, and the fourth inclined surface 14 is inclined toward the windward side of the first guide strip 10 in the opposite direction to the airflow direction A, the airflow from the fan blades can be gathered over a large area through the fourth inclined surface 14 before the airflow is gathered on the second inclined surface 12, thereby guiding a large amount of airflow to gather on the second inclined surface 12 and further concentrating the air volume.

[0060] In some embodiments, the first air guide 10 may simultaneously have a third inclined surface 13 and a fourth inclined surface 14. In this way, the third inclined surface 13 and the fourth inclined surface 14 can simultaneously converge the airflow from the fan blades over a large area, further concentrating the air volume.

[0061] Specifically, the angle between the third inclined plane 13 and the fourth inclined plane 14 is β, where 0° < β < 90°. When the angle between the third inclined plane 13 and the fourth inclined plane 14 is not less than 90°, the airflow from the fan blades will diffuse outward, reducing the effect of concentrating the airflow. Therefore, when the value of the angle β between the third inclined plane 13 and the fourth inclined plane 14 is in the range of 0° < β < 90°, the airflow from the fan blades can be concentrated inward, improving the effect of concentrating the airflow, and further reducing wind resistance.

[0062] Specifically, in the embodiments of this application, the first air guide strip 10 further includes a first end face 15 and a second end face 16 arranged opposite to each other along the axial direction of the front mesh cover 100. The two sides of the first end face 15 are respectively connected to one side of the first inclined surface 11 and one side of the second inclined surface 12. The two sides of the second end face 16 are respectively connected to one side of the third inclined surface 13 and one side of the fourth inclined surface 14. The other side of the first inclined surface 11 is connected to the other side of the third inclined surface 13, and the other side of the second inclined surface 12 is connected to the other side of the fourth inclined surface 14.

[0063] See Figure 4 , Figure 4 for Figure 1 The schematic diagram of a portion of the front grille shown is provided. In the embodiment of this application, the bending angle of the first air guide strip 10 is γ1, where 90°≤|γ1|<180°.

[0064] The bending angle γ1 of the first air guide strip 10 refers to the included angle between the tangents at both ends of the extension direction of the first air guide strip 10.

[0065] By setting the bending angle γ1 of the first air guide 10 to a range of 90°≤|γ1|<180°, the airflow can be more concentrated, which is more conducive to long-distance air delivery.

[0066] Figure 5 for Figure 1 The diagram shows a BB cross-sectional structure of the front grille. Figure 6 for Figure 5 The cross-sectional view of the second air guide strip of the front grille shown is provided in the reference document. Figure 5 and Figure 6 In some embodiments, the front cover 100 further includes a plurality of second air guide strips 20, all of which are located around all the first air guide strips 10. All the second air guide strips 20 are circumferentially distributed around the axis of the front cover 100, and each second air guide strip 20 is bent in the same direction as the rotation direction of the fan blades.

[0067] The second air guide strip 20 is a rib that can guide the airflow direction. All the second air guide strips 20 can be evenly distributed around the axis of the front mesh cover 100.

[0068] Because the second air guide strip 20 is bent in the same direction as the rotation of the fan blade, the airflow can be diffused, thereby making the blowing coverage area larger.

[0069] When the front mesh cover 100 in this embodiment includes both the first air guide strip 10 and the second air guide strip 20, it can achieve the effect of concentrating air in the inner ring and expanding air in the outer ring.

[0070] Furthermore, in order to connect the first air guide strip 10 and the second air guide strip 20, in the embodiments of this application, an annular connecting strip 30 is provided between all the first air guide strips 10 and all the second air guide strips 20. The same end of all the first air guide strips 10 near the second air guide strip 20 is connected to the annular connecting strip 30, and the same end of all the second air guide strips 20 near the first air guide strip 10 is connected to the annular connecting strip 30.

[0071] In some embodiments, the ratio of the number of the first air guide 10 to the number of the second air guide 20 is between 1:1 and 1:3.

[0072] In some embodiments, each second air guide strip 20 has a fifth inclined surface 21 on its leeward side, and the fifth inclined surface 21 is inclined toward the windward side of the second air guide strip 20 along the air outlet direction A.

[0073] In the cross-sectional view of the second air guide strip 20, the left side is the leeward side and the right side is the windward side.

[0074] Since the fifth inclined surface 21 is inclined towards the windward side along the air outlet direction A, it can work together with the first inclined surface 11 and the second inclined surface 12 to further concentrate the air volume, reduce turbulence, reduce air volume loss, and improve the air supply feel and continuity.

[0075] Specifically, the inclination angle of the fifth inclined plane 21 is α3, where 0° < α3 < 60°.

[0076] It should be noted that the inclination angle α3 of the fifth inclined surface 21 refers to the angle between the fifth inclined surface 21 and the second straight line L2 on the cross section of the second air guide strip 20, wherein the second straight line L2 is parallel to the axis of the front mesh cover 100.

[0077] When the tilt angle α3 of the fifth inclined plane 21 is in the range of 0° < α3 < 60°, it can concentrate the air volume over a larger range, reduce turbulence, reduce air volume loss, and improve the feel and continuity of the air supply.

[0078] Optionally, 0°<α1≤10°.

[0079] In some embodiments, each second air guide strip 20 has a first arc surface 22 on its leeward side, and the first arc surface is located upstream of the fifth inclined surface 21 along the air outlet direction A.

[0080] By setting the first arc surface 22, wind resistance can be reduced and operating noise can be lowered.

[0081] In some embodiments, each second air guide slat 20 further has a second arc surface 23 on its windward side.

[0082] Compared to setting the windward side of the second air guide strip 20 as an inclined surface, setting the second arc surface 23 can increase the air guiding area and better guide the wind direction.

[0083] Specifically, the second arc surface 23 extends from one end of the second air guide strip 20 to the other end along the axis of the front mesh cover.

[0084] Specifically, in the embodiments of this application, the second air guide strip 20 further includes a third end face 24 and a fourth end face 25 disposed opposite to each other along the axial direction of the front mesh cover 100. The two sides of the third end face 24 are respectively connected to one side of the fifth inclined surface 21 and one side of the second arc surface 23. The two sides of the fourth end face 25 are respectively connected to one side of the first arc surface 22 and the other side of the second arc surface 23. The other side of the fifth inclined surface 21 is connected to the other side of the first arc surface 22.

[0085] In some embodiments, each second air guide 20 has a first end close to the first air guide 10 and a second end opposite to the first end, and the tilt angle of the second air guide 20 relative to the horizontal plane gradually increases from the first end to the second end along the rotation direction of the fan blade.

[0086] The first and second ends referred to here are the two ends of the extension direction of the second air guide 20.

[0087] Since the bending direction of the second air guide strip 20 is the same as the rotation direction of the fan blade, as the tilt angle of the second air guide strip 20 relative to the horizontal plane gradually increases from the first end to the second end, the airflow can be dispersed, the airflow path becomes larger, and the air volume also increases, effectively reducing wind resistance and operating noise.

[0088] In addition, compared with the second air guide strip 20 with a constant tilt angle, the air guide strip with a variable tilt angle can reduce the gap between the second air guide strips 20 without increasing the number of ribs or thickening the ribs, thereby reducing manufacturing costs and preventing small objects or children's fingers from entering through the gap, thus improving the reliability of the front mesh cover 100.

[0089] Please refer to it again. Figure 4 In the embodiments of this application, the bending angle of the second air guide strip 20 is γ2, 90°≤|γ2|<180°.

[0090] The bending angle γ2 of the second air guide strip 20 refers to the included angle between the tangents at both ends of the extension direction of the second air guide strip 20.

[0091] By setting the bending angle γ2 of the second air guide 20 to a range of 90°≤|γ2|<180°, the airflow can diffuse outward over a larger area, thereby increasing the area blown by the fan.

[0092] Specifically, in the embodiments of this application, the first end of the second air guide strip 20 is tilted at an angle of 90 degrees relative to the horizontal plane, and the second end of the second air guide strip 20 is tilted at an angle greater than 90 degrees relative to the horizontal plane, for example, 120 degrees.

[0093] This application provides a preferred embodiment in which the front grille 100 includes a plurality of first air guide strips 10 in the inner ring and a plurality of second air guide strips 20 in the outer ring. The first air guide strips 10 are bent counterclockwise, opposite to the direction of rotation of the fan blades, which concentrates the airflow in the central area, extending the air delivery distance. Furthermore, the windward and leeward sides of the first air guide strips 10 each have a first inclined surface 11 and a second inclined surface 12, respectively. The first inclined surface 11 and the second inclined surface 12 are arranged opposite each other, and both are inclined towards each other along the air outlet direction A. The inclination angles of the first inclined surface 11 and the second inclined surface 12 are both less than 60 degrees. This effectively concentrates the airflow, reduces turbulence, minimizes airflow loss, and improves the feel and continuity of the airflow. The second air guide strips 20 are bent clockwise, opposite to the bending direction of the first air guide strips 10, which expands the airflow outward. Furthermore, the fifth inclined surface 21 of the second air guide 20 is inclined towards the windward side of the second air guide 20 along the air outlet direction A, and its inclination angle is less than 60 degrees. This allows it to work in conjunction with the first inclined surface 11 and the second inclined surface 12 to further effectively concentrate airflow, reduce turbulence, minimize airflow loss, and improve the feel and continuity of the airflow. The leeward side of the second air guide 20 also has a first arc surface 22, which reduces wind resistance and operating noise. The windward side of the second air guide 20 also has a second arc surface 23, which increases the airflow area and better guides the wind direction. In addition, the inclination angle of the second air guide 20 relative to the horizontal plane gradually increases from the first end to the second end; that is, the second air guide 20 adopts an outwardly gradually inclined design, which enhances airflow distribution, improves airflow pathability, and reduces wind resistance and operating noise.

[0094] In another aspect of this application, a fan is also provided, including the front grille 100 in any of the above embodiments.

[0095] Furthermore, the fan also includes blades and a rear grille, with the blades positioned between the front and rear grilles.

[0096] The aforementioned fan, because the first air guide 10 is bent in the opposite direction to the rotation direction of the fan blades, can concentrate the airflow, thereby concentrating the airflow and increasing the air delivery distance. Furthermore, because the first inclined surface 11 and the second inclined surface 12, which are arranged opposite each other, are inclined towards each other in the air outlet direction A, the air volume can be further concentrated, turbulence can be reduced, air volume loss can be reduced, and the feel and continuity of the air delivery can be improved.

[0097] The following example uses the fan of this application with the following front grille parameters: α1=8°, α2=6°, β=90°, β=15°, α3=10°. The air delivery data of the fan provided in this application is compared with that of a conventional fan, as shown in Table 1:

[0098] Table 1:

[0099] air volume Outer ring air volume wind speed air delivery distance Traditional fan 41.7 21 238 7.5 This application fan 47.98 25 264 8.8

[0100] As can be seen from Table 1, the fan in this embodiment of the application has improved air volume, outer ring air volume, wind speed and air delivery distance compared with traditional fans.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A front mesh cover, characterized in that, It includes multiple first air guide strips, all of which are circumferentially distributed around the axis of the front mesh cover, and each first air guide strip is bent in the opposite direction to the rotation direction of the fan blades; Each of the first air guide strips has a first inclined surface on its windward side and a second inclined surface on its leeward side. The first inclined surface and the second inclined surface are arranged opposite to each other, and both are inclined towards each other along the air outlet direction.

2. The front mesh cover according to claim 1, characterized in that, The inclination angle of the first inclined plane is α1, 0° < α1 < 60°; and / or The inclination angle of the second inclined plane is α2, where 0° < α2 < 60°.

3. The front mesh cover according to claim 1, characterized in that, Each of the first air guide strips further has a third inclined surface on its windward side, the third inclined surface being located upstream of the first inclined surface along the air outlet direction and inclined towards the leeward side of the first air guide strip in a direction opposite to the air outlet direction; and / or Each of the first air guide strips has a fourth inclined surface on its leeward side. The fourth inclined surface is located upstream of the second inclined surface along the air outlet direction and is inclined toward the windward side of the first air guide strip in a direction opposite to the air outlet direction.

4. The front mesh cover according to claim 3, characterized in that, The angle between the third inclined plane and the fourth inclined plane is β, where 0° < β < 90°.

5. The front mesh cover according to any one of claims 1 to 4, characterized in that, The front mesh cover also includes a plurality of second air guide strips. All the second air guide strips are located around all the first air guide strips. All the second air guide strips are circumferentially distributed around the axis of the front mesh cover, and each second air guide strip is bent in the same direction as the rotation direction of the fan blade.

6. The front mesh cover according to claim 5, characterized in that, Each of the second air guide strips has a fifth inclined surface on its leeward side, and the fifth inclined surface is inclined towards the windward side of the second air guide strip along the air outlet direction.

7. The front mesh cover according to claim 6, characterized in that, in, The inclination angle of the fifth inclined plane is α3, where 0° < α3 < 60°.

8. The front mesh cover according to claim 6, characterized in that, Each of the second air guide strips also has a first arc surface on its leeward side, the first arc surface being located upstream of the fifth inclined surface along the air outlet direction.

9. The front mesh cover according to claim 6, characterized in that, Each of the second air guide strips also has a second arc surface on its windward side.

10. The front mesh cover according to claim 6, characterized in that, Each of the second air guides has a first end close to the first air guide and a second end opposite to the first end; along the rotation direction of the fan blade, the tilt angle of the second air guide relative to the horizontal plane gradually increases from the first end to the second end.

11. A fan, characterized in that, Includes the front mesh cover as described in any one of claims 1 to 10.

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