Front mesh enclosure of fan and fan with front mesh enclosure

Abstract

The invention provides a front mesh enclosure of a fan and the fan with the front mesh enclosure. The front mesh enclosure comprises a first enclosure body and a second enclosure body, the second cover body is arranged on the outer side of the first cover body in a sleeving manner, and the first cover body and the second cover body are coaxially arranged; the first cover body comprises a plurality of first ribs extending in the radial direction of the first cover body, the first ribs are distributed in the circumferential direction of the axis of the first cover body, the second cover body comprises a plurality of second ribs extending in the radial direction of the second cover body, the second ribs are distributed in the circumferential direction of the axis of the second cover body, and the second ribs are distributed in the circumferential direction of the axis of the second cover body. The thickness of the first ribs in the air supply direction is 3-20 mm, and the outer diameter of the first cover body is 1 / 4-3 / 4 of the outer diameter of the second cover body. According to the fan front mesh enclosure and the fan with the front mesh enclosure, the structure is simple, and the air supply efficiency can be effectively improved.

Description

[0001] The present invention is a divisional application of application number 201811110653X, application date 2018-09-21, and invention name "Fan front mesh cover and fan with the front mesh cover". Technical Field

[0002] The present invention relates to the technical field of ventilation, and more particularly to a front mesh cover of a fan and a fan having the front mesh cover. Background Art

[0003] A fan is a device that is electrically driven to generate airflow. The fan blades inside the fan rotate when powered on, and the rotation of the fan blades is converted into wind to achieve the effect of cooling down. A fan usually includes a mesh cover, fan blades, and a head assembly. The head assembly is used to provide power to the fan blades so that the fan blades rotate to generate airflow, forming wind blowing in a specific direction.

[0004] The mesh cover surrounds the outer periphery of the fan blades, which can provide safety protection and increase wind speed and guidance to a certain extent. In particular, the front mesh cover in the air supply direction will rotate with the fan blades under the action of the fan blades. There are currently two main types of front mesh covers: one is a metal iron mesh, which is usually used for floor fans with shaking heads; the other is a full plastic mesh cover, which is usually used for lower-power pedestal fans.

[0005] Of the two types of front mesh covers mentioned above, the metal mesh has a large air volume, but does not have the function of guiding wind and increasing wind speed. The plastic mesh cover can effectively increase the wind speed, but will reduce the air supply volume. Both types of mesh covers will reduce the air supply effect and user experience. Summary of the invention

[0006] 1. Technical issues to be resolved The invention provides a fan front mesh cover and a fan having the front mesh cover, so as to solve the technical problem that the air supply volume and air supply speed of the fan cannot be guaranteed at the same time and the air supply efficiency is low.

[0007] (II) Technical solution To solve the above technical problems, according to one aspect of the present invention, a front mesh cover for a fan is provided, comprising a first cover body and a second cover body; the second cover body is sleeved on the outside of the first cover body, and the first cover body and the second cover body are coaxially arranged; The first cover body includes a plurality of first ribs extending radially along the first cover body, and the plurality of first ribs are circumferentially distributed around the axis of the first cover body. The second cover body includes a plurality of second ribs extending radially along the second cover body, and the plurality of second ribs are circumferentially distributed around the axis of the second cover body. The thickness of the first ribs along the air supply direction is 3-20 mm, and the outer diameter of the first cover body is 1 / 4-3 / 4 of the outer diameter of the second cover body.

[0008] Furthermore, the thickness of the first rib along the air supply direction is greater than the thickness of the second rib along the air supply direction.

[0009] Furthermore, the thickness of the second rib along the air supply direction is 1.5-3 mm.

[0010] Furthermore, the first ribs are plastic ribs or metal ribs.

[0011] Furthermore, the second ribs are plastic ribs or metal ribs.

[0012] Furthermore, the first cover body also includes a first annular bracket and a second annular bracket; the outer diameter of the second annular bracket is larger than the outer diameter of the first annular bracket, one end of any first rib is connected to the first annular bracket, and the other end is connected to the second annular bracket, the first annular bracket and the second annular bracket are arranged parallel to each other, and the angle between the generatrix of the frustum with the first annular bracket as the top and the second annular bracket as the bottom and the plane parallel to the second annular bracket is α, wherein -15°≤α≤15°.

[0013] Furthermore, a middle section of the first rib protrudes in a clockwise or counterclockwise direction toward the first cover body, and the protruding directions of the plurality of first ribs are the same.

[0014] Furthermore, the first rib is in a straight strip shape.

[0015] Furthermore, the first cover body is buckled on the second cover body.

[0016] According to another aspect of the present invention, a fan is provided, comprising the above-mentioned front mesh cover.

[0017] (III) Beneficial effects The present invention provides a fan front mesh cover and a fan having the front mesh cover, and its beneficial effects are mainly as follows: The front mesh cover is composed of a first cover body including a first rib and a second cover body including a second rib, which keeps the thickness of the first rib along the air supply direction within a suitable range, and by keeping the outer diameter of the first cover body and the outer diameter of the second cover body within a suitable range, the front mesh cover can effectively increase the wind speed and the air supply volume, thereby improving the air supply efficiency of the fan; Furthermore, the first rib and the second rib can be made of plastic or metal, especially when the first rib is made of plastic and the second rib is made of metal, the wind speed and air volume of the fan can be significantly improved. It further increases the wind speed of the fan by adjusting the thickness of the first rib and the second rib along the air supply direction, and the angle between the busbar of the frustum structure formed by the first annular bracket and the second annular bracket of the first cover body and the second annular bracket, thereby further increasing the air supply efficiency of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view of a front mesh cover for a fan according to an embodiment of the present invention; Figure 2 is a front view of a first cover body of a front mesh cover for a fan according to an embodiment of the present invention; Figure 3 A front mesh cover for a fan according to an embodiment of the present invention Figure 2 AA section view; Figure 4 is a front view of a second cover body of a front mesh cover for a fan according to an embodiment of the present invention; Figure 5 is a front view of a front mesh cover for a fan according to an embodiment of the present invention; Figure 6 is a front view of a front mesh cover for a fan according to an embodiment of the present invention; In the figure, 1-first annular bracket; 2-second annular bracket; 3-first rib; 4-second rib; 5-third annular bracket; 6-fourth annular bracket; 7-first cover body; 8-second cover body. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] See also Figure 1 As shown, a front mesh cover for a fan comprises a first cover body 7 and a second cover body 8; the second cover body 8 is sleeved outside the first cover body, and the first cover body 7 and the second cover body 8 are coaxially arranged; The first cover body 7 includes a plurality of first ribs 3 extending radially along the first cover body 7, and the plurality of first ribs 3 are circumferentially distributed around the axis of the first cover body 7. The second cover body 8 includes a plurality of second ribs 4 extending radially along the second cover body 8, and the plurality of second ribs 4 are circumferentially distributed around the axis of the second cover body 8. The thickness of the first ribs 3 along the air supply direction is 3-20 mm, and the outer diameter of the first cover body 7 is 1 / 4-3 / 4 of the outer diameter of the second cover body 8.

[0021] When the thickness of the first rib 3 along the air supply direction is greater than 3mm and less than 20mm, the wind blown out by the fan blades forms a wind gathering area in the air supply direction after being reflected by the first rib 3. In this way, the "converging wind" blown out by the first rib 3 and the "ordinary wind" blown out by the second rib 4 can allow users to experience a variety of wind types and increase the differentiated selling points of the product. In addition, the thickness of the first rib 3 along the air supply direction cannot be too small. When the thickness is less than 3mm, the blocking effect of the first rib 3 is very weak and the wind gathering effect is lost. At the same time, the thickness of the first rib cannot be too large, otherwise it will affect the normal air output of the fan, which will not only increase the cost, but also increase the noise, which is unbearable for users.

[0022] Specifically, the second cover body 8 is preferably a disc-shaped structure, and it has a central through hole, so that the second cover body 8 is a circular ring structure with a through hole in the center; the first cover body 7 is also preferably a disc-shaped structure, and its size is equivalent to the size of the central through hole. When the first cover body 7 is installed at the central through hole, the first cover body 7 can cover the central through hole, so that the second cover body 8 is sleeved on the outside of the first cover body 7, and the first cover body 7 and the second cover body 8 are coaxially arranged. The outer periphery of the first cover body 7 can contact the inner periphery of the second cover body 8, and the two are connected to form a front mesh cover, and the first cover body 7 and the second cover body 8 are located on the same side of the fan blades, and are both located in the air supply direction of the fan.

[0023] The first cover body 7 includes a plurality of first ribs 3. The plurality of first ribs 3 are circumferentially distributed around the axis of the first cover body 7; preferably, the first ribs 3 are evenly distributed circumferentially. Moreover, there is a gap between any two adjacent first ribs 3, and the gap is the first air duct. The second ribs 4 of the second cover body 8 are circumferentially distributed around the axis of the second cover body 8; preferably, the second ribs 4 are evenly distributed circumferentially. Moreover, there is a gap between any two adjacent second ribs 4, and the gap is also the second air duct.

[0024] When the first cover 7 and the second cover 8 are coaxially arranged, the second ribs 4 of the second cover 8 are also circumferentially distributed around the axis of the first cover 7. The air supplied by the fan blades is supplied from the first air duct and the second air duct to the air supply object.

[0025] The thickness of the first rib 3 along the air supply direction is kept within this range, which can significantly enhance the wind gathering effect and the guiding effect on the air supply in the first cover body 7 area, forming a wind gathering area. The width of the first rib 3 perpendicular to the air supply direction is preferably maintained at 1.5-3 mm, so that the first rib 3 is flat, which can enhance the wind gathering and guiding effects, increase the air duct space, and reduce the air volume loss.

[0026] Furthermore, by adjusting the outer diameters of the first cover body 7 and the second cover body 8 so that the ratio of the cover area of ​​the first cover body 7 to the cover area of ​​the second cover body 8 is maintained within an appropriate range, the regulation of the front mesh cover on the air supply volume and wind speed can be further improved, so that the wind speed can be increased while the air supply volume is effectively increased and the air volume loss is reduced.

[0027] On the basis of the above embodiment, the thickness of the first rib 3 along the air supply direction is greater than the thickness of the second rib 4 along the air supply direction. Specifically, it is preferred that the thickness of the first rib 3 along the air supply direction is greater than the width of the first rib 3 perpendicular to the air supply direction, so that the first rib 3 is flat. The thickness of the first rib 3 along the air supply direction is relatively large, which can limit the wind from spreading around, so that the first air duct has a stronger guiding effect and wind gathering effect; at the same time, because the first rib 3 divides the air supply duct into multiple first air ducts, the first cover body 7 also has the function of increasing the wind speed; and the air duct formed by the gap between adjacent first ribs 3 can also change the air supply range.

[0028] Compared with the first rib 3, the thickness of the second rib 4 along the air supply direction is smaller, or the thickness of the second rib 4 along the air supply direction and the width perpendicular to the air supply direction are both smaller, so that the second rib 4 is relatively thin, which can reduce the loss of air volume, thereby increasing the air volume of the fan. The front mesh cover is located in the air supply direction of the fan blades, and the axes of the first cover body 7 and the second cover body 8 are parallel or approximately parallel to the air supply direction.

[0029] In a specific embodiment, the thickness of the second rib 4 along the air supply direction is preferably 1.5-3mm. On the basis of the above embodiments, this embodiment specifically illustrates the structure of the second rib 4. Specifically, the second rib 4 can be a columnar structure or a flat structure whose thickness along the air supply direction is greater than the width perpendicular to the air supply direction. By adjusting the diameter of the second rib 4 or the thickness along the air supply direction, the wind dispersion effect of the second cover body 8 can be further improved, forming a wind dispersion area and increasing the air volume. The structure of matching the thicker first rib 3 and the relatively thinner second rib 4 can effectively increase the wind speed while also increasing the air supply volume and increasing the air supply distance. It can quickly cool down and improve the user's blowing experience.

[0030] In a specific embodiment, the first rib 3 is a plastic rib or a metal rib. In another specific embodiment, the second rib 4 is a plastic rib or a metal rib. Among them, it is preferred that the first rib 3 is a plastic rib and the second rib 4 is a metal rib. Compared with the ribs made of metal material, the ribs made of plastic material in the wind gathering area can further enhance the wind gathering effect. Combining the first rib 3 made of plastic material and the second rib 4 made of metal material, the wind gathering effect of the wind gathering area and the air volume increase effect of the wind dispersion area can be further enhanced. Among them, when the first rib 3 or the second rib 4 is a metal rib, there is no specific requirement for the type of metal, as long as its strength can meet the stability and safe use of the air supply process.

[0031] On the basis of the above embodiment, the first cover body 7 also includes a first annular bracket 1 and a second annular bracket 2; the outer diameter of the second annular bracket 2 is larger than the outer diameter of the first annular bracket 1, one end of any first rib 3 is connected to the first annular bracket 1, and the other end is connected to the second annular bracket 2, the first annular bracket 1 and the second annular bracket 2 are arranged parallel to each other, and the angle between the generatrix of the frustum with the first annular bracket 1 as the top and the second annular bracket 2 as the bottom and the plane parallel to the second annular bracket 2 is α, wherein -15°≤α≤15°.

[0032] Specifically, the front mesh cover is arranged on one side of the fan blade, and the radial cross-sections of the first annular bracket 1 and the second annular bracket 2 are parallel to the rotating surface of the fan blade. Figure 2 As shown, the first cover body 7 also includes a first annular bracket 1 and a second annular bracket 2. The first annular bracket 1 can be a disc-shaped structure or an annular structure with a hollow channel in the center, which can be adjusted according to the fixing or decoration requirements. The second annular bracket 2 is an annular structure with a hollow channel in the center. The first annular bracket 1 and the second annular bracket 2 are preferably coaxially arranged; and the outer diameter of the second annular bracket 2 is greater than the outer diameter of the first annular bracket 1. In addition, the first annular bracket 1 and the second annular bracket 2 are preferably arranged parallel to each other.

[0033] The first rib 3 includes a first end and a second end, wherein the first end is close to the center of the first cover body 7, and the second end is far from the center of the first cover body 7. The first rib 3 is located between the first annular bracket 1 and the second annular bracket 2, and the first end of any first rib 3 is connected to the first annular bracket 1, and the second end thereof is connected to the second annular bracket 2.

[0034] Furthermore, the coaxially arranged first annular support 1 and second annular support 2 may form a truncated cone structure with the end surface of the first annular support 1 as the top surface and the end surface of the second annular support 2 as the bottom surface. Figure 3 As shown, the angle between the generatrix of the frustum structure and the plane parallel to the second annular support 2 is α.

[0035] It should be noted that when α is 0, the first annular support 1 and the second annular support 2 are coaxially and concentrically arranged. The second annular support 2 is sleeved outside the first annular support 1. When α is not 0, the first annular support 1 is a concave or convex structure relative to the second annular support 2. For example, see Figure 3 As shown, the AA cross-section of the first cover body 7 is a trapezoidal structure. When the x-axis is in the vertically upward direction and the y-axis is in the left direction, when 0<α≤15°, the first annular bracket 1 is recessed relative to the second annular bracket 2 in the direction close to the fan blades, and when -15°≤α<0°, the first annular bracket 1 is protruded relative to the second annular bracket 2 in the direction away from the fan blades.

[0036] Among them, when α is not 0, the angle between the generatrix of the formed frustum structure and the plane parallel to the second annular bracket 2 is maintained in an appropriate range, which can further significantly enhance the effect of the first cover body 7 in guiding wind and increasing wind speed.

[0037] It is understandable that the second cover body 8 may further include a third annular support 5 and a fourth annular support 6 which are coaxially arranged. Figure 4 As shown, the outer diameter of the fourth annular bracket 6 is greater than the outer diameter of the third annular bracket 5. One end of the second rib 4 is connected to the third annular bracket 5, and the other end is connected to the fourth annular bracket 6. The third annular bracket 5 can be connected to the second annular bracket 2; the connection method can be achieved by screwing, riveting or clamping, so as to connect the first cover body 7 and the second cover body 8 together to form a front mesh cover. Among them, the third annular bracket 5 and / or the fourth annular bracket 6 are not necessarily provided, and can be provided according to actual needs. For example, one end of the second rib 4 is connected to the fourth annular bracket 6, and the other end can be directly connected to the second annular bracket 2.

[0038] In a specific embodiment, the middle section of the first rib 3 protrudes in a clockwise or counterclockwise direction toward the first cover body 7, and the protrusion direction of the plurality of first ribs 3 is the same. Based on the above embodiments, this embodiment specifically describes the structure of the first rib 3. Specifically, as one of the feasible ways of the structure of the first rib 3, for example, the first rib 3 can be an arc-shaped strip. Figure 1 and Figure 5As shown, when the middle section of the first rib 3 bulges in the clockwise direction along the first cover body 7, a left-handed acceleration net is formed; when the middle section of the first rib 3 bulges in the counterclockwise direction along the first cover body 7, a right-handed acceleration net is formed. When the first rib 3 is in the shape of a curved strip, while guiding and increasing the wind speed, the curved strip structure of the first rib 3 can also be beneficial to changing the form of air supply, so that the air supply has different wind directions, avoiding direct blowing to the human body, and enhancing human comfort. Its structure is simple, which enhances the human body's blowing experience, and can also play a decorative role, improve the look and feel, and can prevent users from putting their fingers into the fan during the operation of the fan, reducing safety hazards. The shape of the first rib 3 can be adjusted according to factors such as safety, decoration, and production convenience.

[0039] In a specific embodiment, the first rib 3 is in the shape of a straight bar. Based on the above embodiments, this embodiment specifically describes the structure of the first rib 3. For example, see Figure 1 , Figure 5 and Figure 6 As shown in FIG. 1 , there are three feasible ways of forming the first rib 3. When the first rib is a straight bar, its structure is as shown in FIG. Figure 6 Specifically, since the first ribs 3 have a certain thickness along the air supply direction, and there is a gap between two adjacent first ribs 3 to form a first air duct, the first air duct formed by the two adjacent first ribs 3 has a certain length along the air supply direction, which can limit the wind from spreading around.

[0040] In a specific embodiment, the first cover body 7 is buckled onto the second cover body 8. Specifically, the outer periphery of the first cover body 7 contacts the inner periphery of the second cover body 8. As one of the achievable ways, when the first cover body 7 has a second annular bracket 2 and the second cover body 8 has a third annular bracket 5, the side facing the axis of the first annular bracket is the inner side, and the side facing away from the axis is the outer side; a plurality of slots may be provided on the inner side of the third annular bracket 5, and a plurality of buckles or protrusions may be correspondingly provided on the outer side of the second annular bracket 2. When the first cover body 7 is buckled onto the second cover body 8, the buckles or protrusions of the second annular bracket 5 may be correspondingly engaged in the slots on the inner side of the third annular bracket 5.

[0041] It is preferred to buckle along the air supply direction. The side of the front mesh cover close to the fan blade is the back side, and the side away from the fan blade is the front side, that is, when buckling, the first cover body 7 moves from the back side of the front mesh cover to the front side to snap on the second cover body 8; when disassembling, the first cover body 7 moves from the front side of the front mesh cover to the back side to snap on the second cover body 8. As an optional way to achieve the above-mentioned buckling method, the card slot on the inner side of the third annular bracket 5 can adopt a wedge-shaped slot, and correspondingly, the protrusion on the outer side of the second annular bracket 2 can adopt a wedge-shaped protrusion. It can be understood that when the card slot is set on the outer side of the second annular bracket 2 and the corresponding buckle or protrusion is set on the inner side of the third annular bracket 5, the buckling direction is reversed. In this way, the buckling method is simple and easy to disassemble. In addition, the buckling direction is set accordingly, which is conducive to the stability of the combination of the first cover body 7 and the second cover body 8. It can be understood that the first cover body 7 and the second cover body 8 can also be integrally formed, and the buckling method of the two covers is adopted to facilitate the formation of front mesh covers of different specifications.

[0042] In a specific embodiment, a fan is also provided, which includes the above-mentioned front mesh cover. On the basis of the above-mentioned embodiments, this embodiment specifically describes the structure of a fan. Specifically, the fan may include a front mesh cover, a rear mesh cover, fan blades and a head assembly. The front mesh cover and the rear mesh cover are connected to form a cavity between the front mesh cover and the rear mesh cover, and the fan blades are installed in the cavity. The head assembly is installed on the rear mesh cover and is connected to the fan blades to drive the fan blades to rotate and generate wind blowing toward the front mesh cover; the first cover body and the second cover body of the front mesh cover can effectively increase the wind speed and air volume, improve the air supply effect, and improve the user experience. The other structures and operations of the fan of the present invention are known to ordinary technicians in this field and will not be repeated here.

[0043] The fan front mesh cover and the fan having the front mesh cover of the present invention can significantly enhance the air supply volume and air supply speed of the fan by maintaining the thickness of the first rib of the front mesh cover along the air supply direction within a suitable range, the thickness of the first rib along the air supply direction is greater than the thickness of the second rib along the air supply direction, and the ratio of the outer diameters of the first cover body and the second cover body is maintained within a suitable range. At the same time, by locating the two ends of the first rib in different planes, that is, making the first annular bracket recessed in a direction close to the fan blades or protruding in a direction away from the fan blades relative to the second annular bracket, the air supply speed of the front mesh cover is further improved.

[0044] For example, the fan of the present invention is compared with a first fan having a front fan housing all using the second rib structure and a second fan housing having a front fan housing all using the first rib structure. The test results are as follows:

[0045] Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan, characterized in that: The invention comprises a front mesh cover, a rear mesh cover, a fan blade and a head assembly, wherein the front mesh cover and the rear mesh cover are connected to form a cavity between the front mesh cover and the rear mesh cover, the fan blade is installed in the cavity, and the head assembly drives the fan blade to rotate to generate wind blowing toward the front mesh cover, the front mesh cover comprises a first cover body and a second cover body; the second cover body is sleeved on the outside of the first cover body, and the first cover body and the second cover body are coaxially arranged; the first cover body comprises a plurality of first ribs extending radially along the first cover body, the plurality of first ribs are circumferentially distributed around the axis of the first cover body, and any two adjacent first ribs are arranged in a radial direction. There is a gap between the first ribs, which is the first air duct. The second cover body includes a plurality of second ribs extending radially along the second cover body, and the plurality of second ribs are circumferentially distributed around the axis of the second cover body. There is a gap between any two adjacent second ribs, which is also the second air duct. The air supplied by the fan blades is supplied from the first air duct and the second air duct. The thickness of the first rib along the air supply direction is greater than the thickness of the second rib along the air supply direction. The thickness of the first rib along the air supply direction is 3-20 mm, and the outer diameter of the first cover body is 1 / 4-3 / 4 of the outer diameter of the second cover.

2. The fan according to claim 1, characterized in that The thickness of the second rib along the air supply direction is 1.5-3 mm; Alternatively, the width of the first rib along the direction perpendicular to the air supply direction is 1.5-3 mm, and the first cover area forms a wind gathering area.

3. The fan according to claim 1, characterized in that: The first ribs are plastic ribs or metal ribs.

4. The fan according to claim 1 or 3, characterized in that: The second ribs are plastic ribs or metal ribs.

5. The fan according to claim 1, characterized in that: The first cover body also includes a first annular bracket and a second annular bracket; the outer diameter of the second annular bracket is larger than the outer diameter of the first annular bracket, one end of any first rib is connected to the first annular bracket, and the other end is connected to the second annular bracket, the first annular bracket and the second annular bracket are arranged parallel to each other, and the angle between the generatrix of the frustum with the first annular bracket as the top and the second annular bracket as the bottom and the plane parallel to the second annular bracket is α, where -15°≤α≤15°.

6. The fan according to claim 1, characterized in that: The middle section of the first rib protrudes in a clockwise or counterclockwise direction toward the first cover body, and the protrusion directions of the plurality of first ribs are the same.

7. The fan according to claim 1, characterized in that: The first rib is in the shape of a straight bar.

8. The fan according to claim 1, characterized in that The first cover body is buckled on the second cover body.

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