CN119878607A

CN119878607A - Front screen of fan and fan with front screen

Info

Publication number: CN119878607A
Application number: CN202411863956.4A
Authority: CN
Inventors: 崔世强; 蒋团广; 康瑞祥
Original assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Priority date: 2018-02-07
Filing date: 2018-09-21
Publication date: 2025-04-25
Also published as: CN110118201A; CN108194394A; CN110118204A; CN110118204B; CN208793332U; CN208764000U

Abstract

The present invention provides a fan front mesh cover and a fan having the front mesh cover, wherein 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, and the plurality of first ribs are circumferentially distributed around the axis of the first cover body; the second cover body comprises 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. The fan front mesh cover and the fan having the front mesh cover of the present invention have a simple structure and can effectively improve the air supply efficiency.

Description

Front screen of fan and fan with front screen

The invention relates to a split application of a fan front net cover and a fan with the front net cover, wherein the application number is 201811110653X, the application date is 2018-09-21.

Technical Field

The invention relates to the technical field of ventilation, in particular to a front screen of a fan and the fan with the front screen.

Background

The fan is a device driven by electricity to generate air flow, and fan blades arranged in the fan rotate after being electrified, and the fan blades rotate to be converted into wind so as to achieve the effects of cooling and reducing temperature. Fans typically include a mesh enclosure, blades, a handpiece assembly, and the like. The machine head assembly is used for providing power for the fan blades so as to enable the fan blades to rotate to generate air flow, and wind blowing in a specific direction is formed.

The mesh enclosure is enclosed on the periphery of the fan blade, so that safety protection can be realized, and the wind speed and guiding effects can be improved to a certain extent. Particularly, the front net cover in the air supply direction can rotate along with the fan blades under the air supply effect of the fan blades. The prior front net cover mainly has two forms, namely a metal iron net which is usually used for a floor fan with a shaking function, and an all-plastic net cover which is usually used for a seat fan with smaller power.

The front net cover of the two types has large air quantity of the metal iron net, but has no functions of guiding air and improving air speed, the plastic net cover can effectively improve air speed, but can reduce air quantity, and the two types of net covers can reduce air supply effect and user experience.

Disclosure of Invention

First, the technical problem to be solved

The invention provides a front screen of a fan and the fan with the front screen, which are used for solving the technical problems that the air quantity and the air supply speed of the fan cannot be ensured at the same time and the air supply efficiency is low.

(II) technical scheme

In order to solve the technical problems, according to one aspect of the present invention, there is provided a front screen for a fan, comprising a first cover and a second cover, wherein the second cover is sleeved outside the first cover, and the first cover and the second cover are coaxially arranged;

The first cover body comprises a plurality of first ribs extending along the radial direction of the first cover body, the first ribs are circumferentially distributed around the axis of the first cover body, the second cover body comprises a plurality of second ribs extending along the radial direction of the second cover body, the 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 3-20mm, and the outer diameter of the first cover body is 1/4-3/4 of the outer diameter of the second cover body.

Further, the thickness of the first rib along the air supply direction is larger than that of the second rib along the air supply direction.

Further, the thickness of the second ribs along the air supply direction is 1.5-3mm.

Further, the first ribs are plastic ribs or metal ribs.

Further, the second ribs are plastic ribs or metal ribs.

The first cover body further comprises a first annular support and a second annular support, the outer diameter of the second annular support is larger than that of the first annular support, one end of any one of the first ribs is connected with the first annular support, the other end of any one of the first ribs is connected with the second annular support, the first annular support and the second annular support are arranged in parallel, an included angle between a generatrix of a frustum with the first annular support as a top and the second annular support as a bottom and a plane parallel to the second annular support is alpha, and the included angle is more than or equal to 15 degrees, and more than or equal to 15 degrees.

Further, the middle section of the first rib protrudes towards the clockwise direction or the anticlockwise direction of the first cover body, and the protruding directions of the plurality of first ribs are the same.

Further, the first ribs are straight.

Further, the first cover body is fastened on the second cover body.

According to another aspect of the present invention, there is also provided a fan including the front mesh enclosure described above.

(III) beneficial effects

The front screen cover of the fan and the fan with the front screen cover have the advantages that:

The front net cover is composed of a first cover body containing first ribs and a second cover body containing second ribs, the thickness of the first ribs in the air supply direction is kept in a proper range, and the outer diameter of the first cover body and the outer diameter of the second cover body are kept in a proper range, so that the front net cover can effectively improve the air supply speed and the air supply quantity at the same time, and the air supply efficiency of the fan is improved;

In addition, the first ribs and the second ribs can be made of plastic or metal, and particularly when the first ribs are made of plastic and the second ribs are made of metal, the wind speed and the wind quantity of the fan can be obviously improved;

The thickness of the first ribs and the second ribs along the air supply direction is further adjusted, and the included angle between the bus of the frustum structure formed by the first annular support and the second annular support of the first cover body and the second annular support is further increased, so that the air speed of the fan is further increased, and the air supply efficiency of the fan is further improved.

Drawings

FIG. 1 is a front view of a front screen for a fan according to an embodiment of the present invention;

FIG. 2 is a front view of a first housing for a front screen of a fan according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2 of a front screen for a fan according to an embodiment of the present invention;

FIG. 4 is a front view of a second housing for a front screen of a fan according to an embodiment of the present invention;

FIG. 5 is a front view of a front screen for a fan according to an embodiment of the present invention;

FIG. 6 is a front view of a front screen 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 and 8-second cover body.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

Referring to fig. 1, a front screen for a fan comprises a first cover body 7 and a second cover body 8, wherein 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 7 comprises a plurality of first ribs 3 extending along the radial direction of the first cover 7, the plurality of first ribs 3 are circumferentially distributed around the axis of the first cover 7, the second cover 8 comprises a plurality of second ribs 4 extending along the radial direction of the second cover 8, the plurality of second ribs 4 are circumferentially distributed around the axis of the second cover 8, the thickness of the first ribs 3 along the air supply direction is 3-20mm, and the outer diameter of the first cover 7 is 1/4-3/4 of the outer diameter of the second cover 8.

When the thickness of the first ribs 3 in the air supply direction is greater than 3mm and less than 20mm, the air blown by the fan blades forms an air collecting area in the air supply direction after being reflected by the first ribs 3. Thus, the 'converged wind' blown by the first ribs 3 is matched with the 'normal wind' blown by the second ribs 4, so that a user can experience various wind types, and the differentiated selling points of products are increased. In addition, the thickness of the first ribs 3 along the air supply direction cannot be too small, when the thickness is smaller than 3mm, the blocking effect of the first ribs 3 is very weak, the wind gathering effect is lost, meanwhile, the thickness of the first ribs cannot be too large, otherwise, the normal air outlet of the fan is influenced, the cost is increased, noise is increased, and the noise cannot be tolerated by a user.

Specifically, the second cover 8 is preferably a disk-shaped structure having a central through hole, and the second cover 8 is preferably a circular ring-shaped structure having a through hole at the center, and the first cover 7 is also preferably a disk-shaped structure having a size corresponding to the size of the central through hole. When the first cover 7 is installed at the central through hole, the first cover 7 can be covered at the central through hole, the second cover 8 is sleeved outside the first cover 7, and the first cover 7 and the second cover 8 are coaxially arranged. The outer periphery of the first cover body 7 can be contacted with the inner periphery of the second cover body 8, the first cover body 7 and the second cover body 8 are connected to form a front net cover, and the first cover body 7 and the second cover body 8 are positioned on the same side of the fan blade and are both positioned in the air supply direction of the fan.

The first cover 7 comprises a plurality of first ribs 3. The plurality of first ribs 3 are circumferentially distributed around the axis of the first cover 7, preferably the first ribs 3 are circumferentially uniformly distributed. And, have the clearance between two arbitrary adjacent first ribs 3, this clearance is first wind channel. The second ribs 4 of the second cover 8 are circumferentially distributed around the axis of the second cover 8, preferably the second ribs 4 are circumferentially evenly distributed. And, have the clearance between two arbitrary adjacent second ribs 4, this clearance is also the second wind channel.

When the first cover 7 is arranged coaxially with the second cover 8, 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 of the fan is sent out from the first air duct and the second air duct and supplied to the air supply object.

The thickness of the first ribs 3 along the air supply direction is kept within the range, so that the air collecting effect and the guiding effect on the air supply of the first cover body 7 area can be obviously enhanced, and an air collecting area is formed. The width of the first ribs 3 along the direction perpendicular to the air supply direction is preferably kept at 1.5-3mm, so that the first ribs 3 are flat, the air duct space is increased, and the air quantity loss is reduced while the air collecting and guiding effects are enhanced.

Further, through the external diameter of the first cover body 7 and the second cover body 8 of regulation and control, the ratio of the cover surface area of the first cover body 7 to the cover surface area of the second cover body 8 is kept in a proper range, and the regulation of the front net cover to the air supply quantity and the air speed can be further improved, so that the air speed is improved, the air supply quantity is effectively improved, and the loss of the air quantity is reduced.

On the basis of the above embodiment, the thickness of the first rib 3 in the air blowing direction is greater than the thickness of the second rib 4 in the air blowing direction. Specifically, the thickness of the first rib 3 in the air blowing direction is preferably larger than the width of the first rib 3 in the direction perpendicular to the air blowing direction, so that the first rib 3 is flat. The thickness of the first ribs 3 along the air supply direction is relatively large, the circumferential diffusion of the wind direction can be limited, the first air duct has stronger guiding effect and air collecting effect, meanwhile, the first cover 7 has the effect of improving the wind speed because the air supply duct is divided into a plurality of first air ducts by the first ribs 3, and the air ducts formed by gaps between adjacent first ribs 3 can also change the air supply range.

Compared with the first ribs 3, the thickness of the second ribs 4 along the air supply direction is smaller, or the thickness of the second ribs 4 along the air supply direction and the width perpendicular to the air supply direction are smaller, so that the second ribs 4 are relatively thinner, the loss of air quantity can be reduced, and the air quantity of the air supplied by the fan is improved. The front net cover is positioned 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.

In a specific embodiment, the thickness of the second ribs 4 in the blowing direction is preferably 1.5-3mm. On the basis of the above embodiments, the present embodiment specifically describes the structure of the second rib 4. Specifically, the second rib 4 may be a cylindrical structure or a flat structure with a thickness greater than a width perpendicular to the air supply direction, and by adjusting the diameter of the second rib 4 or the thickness along the air supply direction, the air dispersing effect of the second cover 8 can be further improved, an air dispersing area is formed, and the air quantity is improved. Adopt thicker first rib 3 and the relatively thinner second rib 4 matched with structure, when can effectively improve the wind speed, also improve the air supply volume, increase air supply distance, can fast cooling, improve user and blow experience.

In a specific embodiment, the first ribs 3 are plastic ribs or metal ribs. In another specific embodiment, the second ribs 4 are plastic ribs or metal ribs. Preferably, the first ribs 3 are plastic ribs and the second ribs 4 are metal ribs. Compared with the ribs made of metal materials, the ribs made of plastic materials are adopted in the wind gathering area, so that the wind gathering effect can be further enhanced. The first ribs 3 made of plastic materials and the second ribs 4 made of metal materials are combined, so that the wind gathering effect of the wind gathering area and the air quantity lifting effect of the air dispersing area can be further enhanced. When the first rib 3 or the second rib 4 is a metal rib, the metal type is not required to be specified, so long as the strength can satisfy the stability and the safe use in the air supply process.

On the basis of the embodiment, the first cover body 7 further comprises a first annular support 1 and a second annular support 2, the outer diameter of the second annular support 2 is larger than that of the first annular support 1, one end of any one first rib 3 is connected with the first annular support 1, the other end of any one first rib 3 is connected with the second annular support 2, the first annular support 1 and the second annular support 2 are arranged in parallel, an included angle between a generatrix of a frustum with the first annular support 1 as a top and the second annular support 2 as a bottom and a plane parallel to the second annular support 2 is alpha, and the included angle is-15 degrees or more and alpha or less than 15 degrees.

Specifically, the front net cover is arranged on one side of the fan blade, and the cross sections of the first annular bracket 1 and the second annular bracket 2 along the radial direction are parallel to the rotating surface of the fan blade. Referring to fig. 2, the first housing 7 further includes a first annular bracket 1 and a second annular bracket 2. The first annular bracket 1 can be a disc type structure or an annular structure with a hollow pore canal in the center, and can be adjusted according to the fixing or decoration requirements. The second annular support 2 is an annular structure with a hollow pore canal in the center. The first annular support 1 and the second annular support 2 are preferably arranged coaxially and the outer diameter of the second annular support 2 is larger than the outer diameter of the first annular support 1. The first ring support 1 and the second ring support 2 are preferably arranged parallel to each other.

The first rib 3 includes a first end portion near the center of the first cover 7 and a second end portion distant from the center of the first cover 7. The first ribs 3 are located between the first annular support 1 and the second annular support 2, the first end of any one of the first ribs 3 is connected with the first annular support 1, and the second end of any one of the first ribs is connected with the second annular support 2.

Further, the first annular bracket 1 and the second annular bracket 2 which are coaxially arranged can form a frustum structure with the end face of the first annular bracket 1 as the top face and the end face of the second annular bracket 2 as the bottom face. Referring to fig. 3, the included angle between the generatrix of the frustum structure and the plane parallel to the second annular bracket 2 is α.

When α is 0, the first ring holder 1 and the second ring holder 2 are coaxially disposed and concentrically disposed. The second annular support 2 is sleeved outside the first annular support 1. When α is not 0, the first annular support 1 is of concave or convex configuration with respect to the second annular support 2. For example, referring to fig. 3, the first housing 7 has a trapezoidal structure in a cross-sectional view A-A. When the first annular support 1 is in positive x-axis direction and positive y-axis direction in the vertical upward direction, the first annular support 1 is recessed toward the fan blade with respect to the second annular support 2 when 0< alpha is less than or equal to 15 degrees, and the first annular support 1 is protruded away from the fan blade with respect to the second annular support 2 when-15 degrees is less than or equal to alpha <0 degrees.

When α is not 0, the included angle between the bus of the formed frustum structure and the plane parallel to the second annular bracket 2 is kept in a proper range, so that the wind guiding and speed increasing effects of the first cover 7 can be further improved obviously.

It will be appreciated that the second housing 8 may further comprise a third annular bracket 5 and a fourth annular bracket 6 coaxially arranged. Referring to fig. 4, the outer diameter of the fourth ring support 6 is larger than the outer diameter of the third ring support 5. One end of the second rib 4 is connected with the third annular bracket 5, and the other end is connected with the fourth annular bracket 6. The third annular bracket 5 can be connected with the second annular bracket 2 in a threaded connection, riveting or clamping way and the like to connect the first cover body 7 and the second cover body 8 together to form a front net cover. Wherein the third ring support 5 and/or the fourth ring support 6 are not necessarily provided, and may be provided according to actual requirements. For example, one end of the second rib 4 is connected to the fourth ring support 6, and the other end may be directly connected to the second ring support 2.

In a specific embodiment, the middle section of the first ribs 3 protrudes in a clockwise or counterclockwise direction toward the first cover 7, and the protruding directions of the plurality of first ribs 3 are the same. On the basis of the above embodiments, the present embodiment specifically describes the structure of the first rib 3. In particular, as one of the possible ways of constructing the first rib 3, for example, the first rib 3 may be in an arc-shaped strip shape. Referring to fig. 1 and 5, the left-handed accelerating web is formed when the middle section of the first rib 3 is protruded in the clockwise direction of the first cover 7, and the right-handed accelerating web is formed when the middle section of the first rib 3 is protruded in the counterclockwise direction of the first cover 7. When the first ribs 3 are in a curve strip shape, the curve strip-shaped structure of the first ribs 3 can be beneficial to changing the form of air supply when guiding and improving the wind speed, so that the air supply has different wind directions, direct blowing to a human body is avoided, and the comfort level of the human body can be enhanced. Its simple structure, reinforcing human body is bloied and is experienced, can also play the effect of decorating, promotes the impression, and can prevent that the user from stretching into the fan with the finger in fan operation in-process, reduces the potential safety hazard. The shape of the first ribs 3 can be adjusted according to safety, decoration, production convenience and other factors.

In a specific embodiment, the first ribs 3 are straight. On the basis of the above embodiments, the present embodiment specifically describes the structure of the first rib 3. For example, referring to fig. 1, 5 and 6, three possible ways of forming the first rib 3 are shown. When the first rib is straight, the structure is shown in fig. 6. Specifically, since the first ribs 3 have a certain thickness along the air supply direction, and a gap is formed between two adjacent first ribs 3, a first air duct is formed. The first air duct formed by two adjacent first ribs 3 has a certain length in the air supply direction, which can limit the circumferential diffusion of the wind direction.

In a specific embodiment, the first cover 7 is fastened to the second cover 8. Specifically, the outer periphery of the first cover 7 is in contact with the inner periphery of the second cover 8. As one of the realizable modes, when the first cover 7 has the second annular bracket 2 and the second cover 8 has the third annular bracket 5, the side facing the axis of the first annular bracket is taken as the inner side, the side facing away from the axis is taken as the outer side, a plurality of clamping grooves can be arranged on the inner side of the third annular bracket 5, and a plurality of buckles or protrusions are correspondingly arranged on the outer side of the second annular bracket 2. When the first cover 7 is fastened to the second cover 8, the fastener or the protrusion of the second annular bracket 5 is correspondingly engaged in the clamping groove on the inner side of the third annular bracket 5.

Preferably along the blowing direction. The front surface of the front net cover, which is close to the fan blade, is the back surface, and the surface, which is far away from the fan blade, is the front surface, namely, when the front net cover is fastened, the first cover body 7 moves from the back surface of the front net cover to the front surface to be clamped on the second cover body 8, and when the front net cover is detached, the first cover body 7 moves from the front surface of the front net cover to the back surface to be clamped on the second cover body 8. As an alternative to the above-mentioned fastening means, the clamping groove on the inner side of the third ring-shaped holder 5 may be a wedge-shaped groove, and correspondingly, the protrusion on the outer side of the second ring-shaped holder 2 may be a wedge-shaped protrusion. It will be appreciated that when the clamping groove is provided on the outside of the second annular bracket 2 and the corresponding catch or projection is provided on the inside of the third annular bracket 5, the direction of the catch is reversed. By adopting the mode, the buckling mode is simple and easy to disassemble. And, set up the lock joint direction correspondingly, do benefit to the stability that first cover body 7 and second cover body 8 combine. It can be understood that the first cover 7 and the second cover 8 may be integrally formed, and the two covers are fastened to form front mesh covers with different specifications.

In a specific embodiment, a fan is also provided, which includes the front mesh enclosure described above. On the basis of the above embodiments, the present embodiment specifically describes a structure of a fan. Specifically, the fan may include a front screen, a rear screen, blades, and a head assembly. The front net cover is connected with the rear net cover, so that a cavity is formed between the front net cover and the rear net cover, and the fan blades are installed in the cavity. The first cover body and the second cover body of the front net cover can effectively improve the wind speed and the wind quantity, improve the air supply effect and improve the user experience. Other configurations and operations of the fan of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

According to the front screen of the fan and the fan with the front screen, the thickness of the first ribs of the front screen along the air supply direction is kept in a proper range, the thickness of the first ribs along the air supply direction is larger than that of the second ribs, the ratio of the outer diameters of the first cover body to the outer diameters of the second cover body is kept in a proper range, the air supply quantity and the air supply speed of the fan can be remarkably enhanced, and meanwhile, the two ends of the first ribs are located in different planes, namely, the first annular support is recessed towards the direction close to the fan blades or protruding towards the direction far away from the fan blades relative to the second annular support, so that the air supply speed of the front screen is further improved.

For example, the fan of the present invention is compared with the first mesh enclosure in which the front mesh enclosure entirely adopts the second rib structure and the second mesh enclosure in which the front mesh enclosure entirely adopts the first rib structure, and the test results are as follows:

finally, the method of the present invention is only a preferred embodiment and is not intended to limit the 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 it 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, the head assembly drives the fan blade to rotate to generate wind blown 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, and the plurality of first ribs are circumferentially distributed around the axis of the first cover body, There is a gap between any two adjacent first ribs, and the gap is the first air duct. The second cover body includes multiple second ribs extending radially along the second cover body, and the multiple second ribs are circumferentially distributed around the axis of the second cover body. There is a gap between any two adjacent second ribs, and the gap is also the second air duct. The air supplied by the fan blades is delivered 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 3-20mm, 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 , wherein the first rib is a plastic rib or a metal rib.

4 . The fan according to claim 1 , wherein the second ribs are plastic ribs or metal ribs.

5. The fan according to claim 1 is characterized in that the first cover body further 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°.

6 . The fan according to claim 1 , wherein 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.

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

8 . The fan according to claim 1 , wherein the first cover is buckled onto the second cover.