Front mesh enclosure and fan

Abstract

The invention 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] The present application relates to the technical field of household appliances, and in particular to a front grille and a fan. Background Art

[0002] Existing fan air supply devices generally use a combination of fan blades and mesh covers. Due to the high cost of metal mesh covers, they are gradually replaced by plastic mesh covers. However, compared with metal mesh covers, plastic mesh covers have greater wind resistance and air volume loss. There are problems such as fan airflow divergence, poor wind feeling and uncontinuous air supply. Summary of the invention

[0003] Based on this, it is necessary to provide a front mesh cover and a fan to address the problems of existing fans with airflow dispersion, poor wind feeling and discontinuous air supply.

[0004] In one aspect of the present application, a front mesh cover is provided, comprising a plurality of first air guide strips, all of which are circumferentially distributed around the axis of the front mesh cover, and each of which is bent in a direction opposite to the rotation direction of the fan blade;

[0005] The windward side of each first air guide strip has a first inclined surface, and the leeward side of each first air guide strip has a second inclined surface. The first inclined surface and the second inclined surface are arranged opposite to each other, and both are inclined toward each other along the wind outlet direction.

[0006] The front grille, because the first air guide strip is bent in the direction opposite to the rotation direction of the fan blade, can gather the airflow, achieve the effect of concentrating the wind direction and increasing the air supply distance. In addition, because the first inclined surface and the second inclined surface are arranged opposite to each other in a tilted direction along the wind outlet direction, the air volume can be further concentrated, turbulence can be reduced, air volume loss can be reduced, and the wind feeling and continuity of the air supply can be improved.

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

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

[0009] When the inclination angle α1 of the first slope is in the range of 0°<α1<60° and the inclination angle α1 of the second slope is in the range of 0°<α1<60°, the air volume can be concentrated in a larger range, turbulence can be reduced, air volume loss can be reduced, and the wind feeling and continuity of air supply can be improved.

[0010] In one embodiment, the windward side of each first air guide strip further comprises a third inclined surface, the third inclined surface is arranged upstream of the first inclined surface along the wind outlet direction, and is inclined toward the leeward side of the first air guide strip along a direction opposite to the wind outlet direction; and / or

[0011] The leeward side of each first air guide strip also has a fourth slope, which is arranged upstream of the second slope along the wind outlet direction and tilted toward the windward side of the first air guide strip along a direction opposite to the wind outlet direction.

[0012] Since the airflow from the fan blades first passes through the third inclined surface, and the third inclined surface is inclined toward the leeward side of the first air guide strip in the direction opposite to the wind outlet direction, before the first inclined surface gathers the wind, the airflow from the fan blades can be gathered on a large scale through the third inclined surface, thereby guiding a large amount of airflow to gather on the first inclined surface, further concentrating the wind volume. Similarly, since the airflow from the fan blades first passes through the fourth inclined surface, and the fourth inclined surface is inclined toward the windward side of the first air guide strip in the direction opposite to the wind outlet direction, before the second inclined surface 12 gathers the wind, the airflow from the fan blades can be gathered on a large scale through the fourth inclined surface, thereby guiding a large amount of airflow to gather on the second inclined surface, further concentrating the wind volume.

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

[0014] When the angle β between the third inclined plane and the fourth inclined plane is in the range of 0°<β<90°, the airflow from the fan blades can be concentrated inwards, thereby improving the effect of concentrating the air volume. In addition, the wind resistance can be further reduced.

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

[0016] Since the second air guide strip is bent in the same direction as the rotation direction of the fan blade, the airflow can be diffused, thereby making the coverage area of ​​the blowing larger.

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

[0018] Since the fifth inclined surface is inclined toward the windward side along the wind outlet direction, it can cooperate with the first inclined surface and the second inclined surface to further concentrate the air volume, reduce turbulence, reduce air volume loss, and improve the wind feeling and continuity of the air supply.

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

[0020] When the inclination angle α3 of the fifth slope is in the range of 0°<α3<60°, the wind volume can be concentrated in a larger range, turbulence can be reduced, wind volume loss can be reduced, and the wind feeling and continuity of the air supply can be improved.

[0021] In one embodiment, the leeward side of each second air guiding strip further comprises a first arc surface, and the first arc surface is arranged upstream of the fifth inclined surface along the wind outlet direction.

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

[0023] In one embodiment, the windward side of each second air guiding strip further has a second curved surface.

[0024] Compared with setting the windward side of the second air guide strip as an inclined surface, by setting the second curved surface, the air guide area can be increased and the wind direction can be better guided.

[0025] In one embodiment, each second air guide strip has a first end close to the first air guide strip and a second end opposite to the first end; along the rotation direction of the fan blade, the inclination angle of the second air guide strip 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 strip is the same as the rotation direction of the fan blade, when the inclination angle of the second air guide strip relative to the horizontal plane gradually increases from the first end to the second end, the airflow can be dispersed, the flow path of the airflow becomes larger, and the air volume also becomes larger, effectively reducing wind resistance and operating noise.

[0027] In another aspect of the present application, a fan is provided, comprising the front mesh cover in any of the above embodiments.

[0028] In the above fan, since the first air guide strip is bent in the direction opposite to the rotation direction of the fan blade, the airflow can be gathered to achieve the effect of concentrating the wind direction and increasing the air supply distance. In addition, since the first inclined surface and the second inclined surface are arranged opposite to each other in an inclined manner along the air outlet direction, the air volume can be further concentrated, turbulence can be reduced, air volume loss can be reduced, and the wind feeling and continuity of the air supply can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of the front grille in one or more embodiments of the present application.

[0030] Figure 2 for Figure 1 AA cross-sectional structural schematic diagram of the front grille shown.

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

[0032] Figure 4 for Figure 1 A schematic structural diagram of a partial structure of the front grille shown.

[0033] Figure 5 for Figure 1 Schematic diagram of the BB cross-sectional structure of the front grille shown.

[0034] Figure 6 for Figure 5 A cross-sectional view of the second air guide strip of the front grille is shown. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Front grille 100, first air guide strip 10, first inclined plane 11, second inclined plane 12, third inclined plane 13, fourth inclined plane 14, first end surface 15, second end surface 16, second air guide strip 20, fifth inclined plane 21, first arc surface 22, second arc surface 23, third end surface 24, fourth end surface 25, annular connecting strip 30, first straight line L1, second straight line L2. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0042] Figure 1 A front view of a front grille in an embodiment of the present application is shown. Figure 2 for Figure 1 The AA cross-sectional structure diagram of the front grille shown in FIG. Figure 3 for Figure 2 A cross-sectional view of the first air guide strip of the front grille is shown. Figures 1 to 3 The front grille 100 provided in one embodiment of the present application includes a plurality of first air guide strips 10, all of which are circumferentially distributed around the axis of the front grille 100, and each of which is bent in a direction opposite to the rotation direction of the fan blade. The windward side of each first air guide strip 10 has a first inclined surface 11, and the leeward side of each first air guide strip 10 has a second inclined surface 12. The first inclined surface 11 and the second inclined surface 12 are arranged opposite to each other, and both are inclined in a direction close to each other along the wind outlet direction A.

[0043] The definitions of "windward side" and "leeward side" in this article are all relative to the air flow direction. The side facing the air flow direction is the "windward side", and the side facing away from the air flow direction is the "leeward side". Specifically, the fan blade of the embodiment of the present application rotates clockwise, so, referring to the figure, the left side of the cross-sectional view of the first air guide strip 10 is the leeward side, and the right side is the windward side.

[0044] The first air guide strips 10 are ribs capable of guiding the direction of airflow. All the first air guide strips 10 may be evenly distributed around the axis of the front grille 100 in the circumferential direction.

[0045] Since the first air guide strip 10 is bent in the direction opposite to the rotation direction of the fan blade, the airflow can be gathered to achieve the effect of concentrating the wind direction and increasing the air supply distance. In addition, since the first inclined surface 11 and the second inclined surface 12 are arranged opposite to each other in a tilted direction along the air outlet direction A, the air volume can be further concentrated, turbulence can be reduced, air volume loss can be reduced, and the wind feeling and continuity of the air supply can be improved.

[0046] In some embodiments, the inclination angle of the first inclined surface 11 is α1, and 0°<α1<60°.

[0047] 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 strip 10 , wherein the first straight line L1 is parallel to the axis of the front grille 100 .

[0048] When the inclination angle α1 of the first slope 11 is in the range of 0°<α1<60°, the wind volume can be concentrated in a larger range, turbulence can be reduced, wind volume loss can be reduced, and the wind feeling and continuity of the air supply can be improved.

[0049] Optionally, 0°<α1≤10°.

[0050] In some embodiments, the inclination angle of the second inclined surface 12 is α2, and 0°<α2<60°.

[0051] 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 strip 10 , wherein the first straight line L1 is parallel to the axis of the front grille 100 .

[0052] When the inclination angle α2 of the second slope 12 is in the range of 0°<α2<60°, the wind volume can be concentrated in a larger range, turbulence can be reduced, wind volume loss can be reduced, and the wind feeling and continuity of the air supply can be improved.

[0053] Optionally, 0°<α2≤10°.

[0054] In some embodiments, 0°<α1<60°, and 0°<α1<60°. In this way, the first inclined surface 11 and the second inclined surface 12 can simultaneously guide the airflow to deliver and converge in a larger range, thereby achieving large-scale concentrated air delivery with large air volume.

[0055] In some embodiments, the windward side of each first air guide strip 10 further has a third slope 13, which is arranged upstream of the first slope 11 along the wind direction A and tilted toward the leeward side of the first air guide strip 10 along the direction opposite to the wind direction A.

[0056] Since the airflow from the fan blades first passes through the third inclined surface 13, and the third inclined surface 13 is inclined toward the leeward side of the first air guide strip 10 in the direction opposite to the wind outlet direction A, before the first inclined surface 11 gathers the wind, the airflow from the fan blades can be gathered on a large scale through the third inclined surface 13, thereby guiding a large amount of airflow to gather on the first inclined surface 11, further concentrating the wind volume.

[0057] In some embodiments, the leeward side of each first air guide strip 10 further has a fourth slope 14 , which is disposed upstream of the second slope 12 along the wind direction A and tilted toward the windward side of the first air guide strip 10 along a direction opposite to the wind direction A.

[0058] Similarly, since the airflow from the fan blades first passes through the fourth inclined surface 14, and the fourth inclined surface 14 is inclined toward the windward side of the first air guide strip 10 in the direction opposite to the wind outlet direction A, before the second inclined surface 12 gathers the wind, the airflow from the fan blades can be gathered on a large scale through the fourth inclined surface 14, thereby guiding a large amount of airflow to gather on the second inclined surface 12, further concentrating the wind volume.

[0059] In some embodiments, the first air guide strip 10 may have both the third inclined surface 13 and the 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 in a large range, further concentrating the air volume.

[0060] Specifically, the angle between the third inclined plane 13 and the fourth inclined plane 14 is β, 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 concentrated air volume. Therefore, when the value range of the angle β between the third inclined plane 13 and the fourth inclined plane 14 is 0°<β<90°, the airflow from the fan blades can be concentrated inward, improving the effect of concentrated air volume, and further reducing wind resistance.

[0061] Specifically in the implementation manner of the present application, the first air guide strip 10 also includes a first end face 15 and a second end face 16 which are relatively arranged along the axial direction of the front mesh cover 100, wherein 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.

[0062] See also Figure 4 , Figure 4 for Figure 1 As shown in the structural schematic diagram of a partial structure of the front grille, in the embodiment of the present application, the bending angle of the first air guide strip 10 is γ1, 90°≤|γ1|<180°.

[0063] The bending angle γ1 of the first air guide strip 10 refers to the angle between the tangent planes at both ends of the extending direction of the first air guide strip 10 .

[0064] By setting the value range of the bending angle γ1 of the first air guide strip 10 to 90°≤|γ1|<180°, the airflow can be more concentrated, which is more conducive to long-distance air supply.

[0065] Figure 5 for Figure 1 The BB cross-sectional structure diagram of the front grille shown in FIG. Figure 6 for Figure 5 The cross-sectional view of the second air guide strip of the front grille shown in FIG. Figure 5 and Figure 6 In some embodiments, the front mesh cover 100 further includes a plurality of second air guide strips 20, all of the second air guide strips 20 are located outside all of the first air guide strips 10, all of the second air guide strips 20 are circumferentially distributed around the axis of the front mesh cover 100, and each second air guide strip 20 is bent in the same direction as the rotation direction of the fan blade.

[0066] The second air guide strips 20 are ribs capable of guiding the airflow direction. All the second air guide strips 20 may be evenly distributed around the axis of the front grille 100 in the circumferential direction.

[0067] Since the second air guide strip 20 is bent in the same direction as the rotation direction of the fan blade, the airflow can be diffused, thereby increasing the coverage area of ​​the blowing air.

[0068] When the front mesh cover 100 in the embodiment of the present application includes the first air guide strip 10 and the second air guide strip 20 at the same time, the effect of gathering wind in the inner circle and expanding wind in the outer circle can be achieved.

[0069] Furthermore, in order to connect the first air guide strips 10 and the second air guide strips 20, in an embodiment of the present application, an annular connecting strip 30 is provided between all the first air guide strips 10 and all the second air guide strips 20, and the same end of all the first air guide strips 10 close to the second air guide strips 20 is connected to the annular connecting strip 30, and the same end of all the second air guide strips 20 close to the first air guide strip 10 is connected to the annular connecting strip 30.

[0070] In some embodiments, the ratio of the number of the first air guide strips 10 to the number of the second air guide strips 20 is between 1:1 and 1:3.

[0071] In some embodiments, the leeward side of each second air guide strip 20 has a fifth inclined surface 21 , and the fifth inclined surface 21 is inclined along the wind outlet direction A toward the windward side of the second air guide strip 20 .

[0072] The left side of the cross-sectional view of the second air guide strip 20 is the leeward side, and the right side is the windward side.

[0073] Since the fifth slope 21 is inclined toward the windward side along the air outlet direction A, it can cooperate with the first slope 11 and the second slope 12 to further concentrate the air volume, reduce turbulence, reduce air volume loss, and improve the wind feeling and continuity of the air supply.

[0074] Specifically, the inclination angle of the fifth inclined surface 21 is α3, and 0°<α3<60°.

[0075] 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 grille 100 .

[0076] When the value range of the inclination angle α3 of the fifth inclined surface 21 is 0°<α3<60°, the wind volume can be concentrated in a larger range, turbulence can be reduced, wind volume loss can be reduced, and the wind feeling and continuity of the air supply can be improved.

[0077] Optionally, 0°<α1≤10°.

[0078] In some embodiments, the leeward side of each second air guiding strip 20 further comprises a first curved surface 22 , and the first curved surface is disposed upstream of the fifth inclined surface 21 along the air outlet direction A.

[0079] By providing the first curved surface 22, wind resistance can be reduced and operating noise can be lowered.

[0080] In some embodiments, the windward side of each second air guiding strip 20 further has a second curved surface 23 .

[0081] Compared with setting the windward side of the second air guide strip 20 as an inclined surface, by setting the second curved surface 23, the air guide area can be increased and the wind direction can be better guided.

[0082] Specifically, the second curved surface 23 extends from one end to the other end of the second air guide strip 20 along the axis of the front grille.

[0083] Specifically in the implementation manner of the present application, the second air guide strip 20 also includes a third end face 24 and a fourth end face 25 which are relatively arranged along the axial direction of the front grille 100, wherein 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 curved surface 23, the two sides of the fourth end face 25 are respectively connected to one side of the first curved surface 22 and the other side of the second curved surface 23, and the other side of the fifth inclined surface 21 is connected to the other side of the first curved surface 22.

[0084] In some embodiments, each second air guide strip 20 has a first end close to the first air guide strip 10 and a second end opposite to the first end. Along the rotation direction of the wind blade, the inclination angle of the second air guide strip 20 relative to the horizontal plane gradually increases from the first end to the second end.

[0085] The first end and the second end referred to here are two ends of the second air guiding strip 20 in the extending direction.

[0086] Since the bending direction of the second air guide strip 20 is the same as the rotation direction of the fan blade, when the inclination 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 flow path of the airflow becomes larger, and the air volume also becomes larger, effectively reducing wind resistance and operating noise.

[0087] In addition, compared with the second air guide strip 20 with a constant inclination angle, the air guide strip with a variable inclination 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, thereby improving the reliability of the front mesh cover 100.

[0088] Please refer again Figure 4 In the embodiment of the present application, the bending angle of the second air guide strip 20 is γ2, 90°≤|γ2|<180°.

[0089] The bending angle γ2 of the second air guide strip 20 refers to the angle between the cross-sections at both ends of the extending direction of the second air guide strip 20 .

[0090] By setting the value range of the bending angle γ2 of the second air guide strip 20 to 90°≤|γ2|<180°, the air flow can be diffused outwards in a larger range, thereby increasing the fan blowing area.

[0091] Specifically in the embodiment of the present application, the inclination angle of the first end of the second air guide strip 20 relative to the horizontal plane is 90 degrees, and the inclination angle of the second end of the second air guide strip 20 relative to the horizontal plane is greater than 90 degrees, for example, 120 degrees.

[0092] The present application provides a preferred embodiment, the front mesh cover 100 includes a plurality of first air guide strips 10 in the inner circle and a plurality of second air guide strips 20 in the outer circle, wherein the first air guide strip 10 is bent in a counterclockwise direction opposite to the rotation direction of the fan blade, so that the wind in the middle area can be gathered and the air supply distance can be longer, and the windward side and the leeward side of the first air guide strip 10 respectively have a first inclined surface 11 and a second inclined surface 12, the first inclined surface 11 and the second inclined surface 12 are arranged opposite to each other, and both are inclined in a direction close to each other along the air outlet direction A, and the inclination angles of the first inclined surface 11 and the second inclined surface 12 are both less than 60 degrees, so that the air volume can be effectively concentrated, turbulence can be reduced, air volume loss can be reduced, and the wind feeling and continuity of the air supply can be improved. The second air guide strip 20 is bent in a clockwise direction, opposite to the bending direction of the first air guide strip 10, and can expand the air outward. Moreover, the fifth inclined surface 21 of the second air guide strip 20 is inclined along the air outlet direction A toward the windward side of the second air guide strip 20, and its inclination angle is also less than 60 degrees. In this way, it can cooperate with the first inclined surface 11 and the second inclined surface 12 to further effectively concentrate the air volume, reduce turbulence, reduce air volume loss, and improve the wind feeling and continuity of the air supply. The leeward side of the second air guide strip 20 also has a first curved surface 22, which can reduce wind resistance and reduce operating noise. The windward side of the second air guide strip 20 also has a second curved surface 23, which can increase the wind guide area and better guide the wind direction. In addition, the inclination angle of the second air guide strip 20 relative to the horizontal plane gradually increases from the first end to the second end, that is, the second air guide strip 20 adopts a design of gradually inclining outward, which can enhance the airflow distribution, enhance the air flow path, and reduce wind resistance and operating noise.

[0093] In another aspect of the present application, a fan is provided, comprising the front mesh cover 100 in any of the above embodiments.

[0094] Furthermore, the fan also includes a fan blade and a rear mesh cover, and the fan blade is arranged between the front mesh cover and the rear mesh cover.

[0095] In the above fan, since the first air guide strip 10 is bent in the direction opposite to the rotation direction of the fan blade, the airflow can be gathered to achieve the effect of concentrating the wind direction and increasing the air supply distance. In addition, since the first inclined surface 11 and the second inclined surface 12 are arranged opposite to each other in a tilted direction along the air outlet direction A, the air volume can be further concentrated, turbulence can be reduced, air volume loss can be reduced, and the wind feeling and continuity of the air supply can be improved.

[0096] Taking the fan of the present application with the following front grille parameters as an example: α1 = 8°, α2 = 6°, β = 90°, β = 15°, α3 = 10°, the air supply data of the fan provided by the present application is compared with that of the traditional fan, as shown in Table 1:

[0097] Table 1:

[0098] Air volume Outer ring air volume Wind speed Air supply distance Traditional fan 41.7 21 238 7.5 This application fan 47.98 25 264 8.8

[0099] It can be seen from Table 1 that the fan of the embodiment of the present application has improved air volume, outer ring air volume, wind speed and air supply distance compared to the traditional fan.

[0100] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0101] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A front grille, characterized in that: It comprises a plurality of first air guide strips, all of which are circumferentially distributed around the axis of the front net cover, and each of which is bent in a direction opposite to the rotation direction of the fan blade; The windward side of each of the first air guide strips has a first slope, and the leeward side of each of the first air guide strips has a second slope. The first slope and the second slope are arranged opposite to each other, and both are inclined toward each other along the wind outlet direction.

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

3. The front grille according to claim 1, characterized in that: The windward side of each of the first air guide strips further comprises a third inclined surface, the third inclined surface is arranged upstream of the first inclined surface along the wind outlet direction, and is inclined toward the leeward side of the first air guide strip along a direction opposite to the wind outlet direction; and / or The leeward side of each of the first air guide strips further has a fourth slope, which is arranged upstream of the second slope along the air outlet direction and tilted toward the windward side of the first air guide strip along a direction opposite to the air outlet direction.

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

5. The front grille 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 of which are located outside all of the first air guide strips, all of which are circumferentially distributed around the axis of the front mesh cover, and each of which is bent in the same direction as the rotation direction of the fan blade.

6. The front grille according to claim 5, characterized in that: The leeward side of each of the second air guide strips has a fifth inclined surface, and the fifth inclined surface is inclined toward the windward side of the second air guide strip along the air outlet direction.

7. The front grille according to claim 6, characterized in that: in, The inclination angle of the fifth inclined surface is α3, 0°<α3<60°.

8. The front grille according to claim 6, characterized in that: The leeward side of each of the second air guiding strips further has a first arc surface, and the first arc surface is arranged upstream of the fifth inclined surface along the air outlet direction.

9. The front grille according to claim 6, characterized in that: The windward side of each of the second air guiding strips further has a second curved surface.

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

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

Images