Fan mesh enclosure and fan

Abstract

The utility model provides a fan mesh enclosure and fan, including: the back mesh enclosure and install the front mesh enclosure of the back mesh enclosure, form the space that accommodates the fan blade between the front mesh enclosure and the back mesh enclosure, the front mesh enclosure includes: a plurality of arc-shaped guide plate, the arc-shaped flow guide plates are evenly distributed in the circumferential direction from the center position of the front net cover and diverge outwards, and the arrangement direction of the arc-shaped flow guide plates is perpendicular to the direction of fan blades. A first air gathering sinking groove is formed in the concave side of each arc-shaped flow guide plate, one side of each first air gathering sinking groove communicates with the inner space of the fan mesh enclosure, and the other side of each first air gathering sinking groove smoothly extends to the air outlet direction of the corresponding arc-shaped flow guide plate. The first air gathering sinking groove is used for increasing the outward air outlet speed of the front net cover. By the adoption of the scheme, diffused air forms spiral condensed air after passing through the fan mesh enclosure, the air volume is concentrated, and the air exhausting speed of the fan mesh enclosure is greatly increased.

Description

Technical Field

[0001] This utility model belongs to the field of fan lamp head technology, and specifically relates to a fan grille and a fan. Background Technology

[0002] Fans are extremely common heat dissipation and cooling devices used in various fields of life and production. There are two types of fans: axial and radial, mainly classified by the direction of airflow when the fan is working. When an axial fan is working, the blades push the air to flow in the same direction as the axis. Due to its advantages such as simple structure and large air volume, axial fans are highly adaptable and have a wide range of applications.

[0003] Axial flow fans mainly consist of an impeller and a mesh cover. The mesh cover surrounds the impeller, providing safety protection and, to some extent, increasing wind speed and guiding the airflow. Traditional fan mesh covers are made of thin iron wire or plastic material of the same shape to form a mesh structure. When the impeller rotates, the gas enters the impeller axially from the air inlet. The gas energy is increased by the pushing force of the blades on the impeller, and then the axial wind is delivered. The wind delivered by the impeller passes through the mesh cover and is blown out to the outside. The axial wind generated by an axial flow fan is generally dispersed and has a relatively slow wind speed, reducing the amount of air delivered in the same amount of time. Utility Model Content

[0004] The main objective of this invention is to provide a fan guard and a fan. A first air-gathering groove is provided on the recessed side of each arc-shaped guide plate. One side of the first air-gathering groove communicates with the internal space of the fan guard, and the other side extends smoothly to the air outlet direction of the arc-shaped guide plate. The first air-gathering groove is used to increase the speed of the airflow from the front fan guard. This solution overcomes the shortcomings of traditional fan guards, which cannot change the generally dispersed airflow and slow speed of axial wind generated by axial fans, resulting in reduced airflow volume in the same time period. By cooperating between each arc-shaped guide plate and its first air-gathering groove, the structure of the fan guard is improved, allowing the dispersed airflow to form a spiraling, condensed airflow after passing through the fan guard. This concentrates the airflow and significantly increases the airflow speed discharged from the fan guard, facilitating the promotion of fans equipped with this fan guard.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A fan guard includes a rear guard and a front guard mounted on the rear guard, forming a space between the front guard and the rear guard to accommodate fan blades. The front guard includes a plurality of arc-shaped guide vanes, which are evenly distributed outward from the center of the front guard along a circumferential direction, and the arrangement direction of the plurality of arc-shaped guide vanes is perpendicular to the direction of the fan blades. A first air-gathering groove is provided on the recessed side of each arc-shaped guide vane, one side of the first air-gathering groove communicating with the internal space of the fan guard, and the other side of the first air-gathering groove smoothly extending to the air outlet direction of the arc-shaped guide vane. The first air-gathering groove is used to increase the speed of the outward airflow from the front guard.

[0007] As a preferred embodiment of the fan guard, each of the arc-shaped air guide plates has a guide protrusion on its protruding side; the guide protrusion includes: a protruding part disposed at the middle part of the protruding side of the arc-shaped air guide plate along the length direction of the arc-shaped air guide plate, and a guide surface extending smoothly along both sides of the protruding part toward the direction of the fan blades and the air outlet direction of the fan blades, the protruding part and the guide surface cooperate with each other to guide the air blown out by the fan blades.

[0008] As a preferred embodiment of the fan guard, the front guard further includes: a fixed center, an aromatherapy pad, and an aromatherapy cover; the fixed center is located at the center position surrounded by multiple arc-shaped guide plates and is integrally formed with one end of each arc-shaped guide plate; the fixed center is recessed inward to form a receiving groove, the aromatherapy pad is received in the receiving groove, and the aromatherapy cover is installed at the opening of the receiving groove; the bottom of the receiving groove is provided with an air inlet hole, and the aromatherapy cover is provided with an air outlet hole, and the air blown out by the fan blades passes sequentially through the air inlet hole, the surface of the aromatherapy pad, and the air outlet hole to be blown out to the outside.

[0009] As a preferred embodiment of the fan grille, the front grille further includes: an outer contour; the outer contour surrounds the other end of the plurality of arc-shaped guide plates and is integrally formed with each of the arc-shaped guide plates; a second air-gathering groove is provided on the inner side of the outer contour at a position between two adjacent arc-shaped guide plates, one end of the second air-gathering groove is connected to the internal space of the fan grille, and the other end of the second air-gathering groove extends smoothly to the air outlet direction of the outer contour.

[0010] As a preferred embodiment of the fan guard, the outer side of the outer contour is provided with multiple snap-fit ​​grooves, the front side of the rear guard is provided with an installation opening, and the inner side of the installation opening is provided with multiple snap-fit ​​protrusions. After the snap-fit ​​protrusions snap into the corresponding snap-fit ​​grooves, the front guard is installed at the installation opening of the rear guard.

[0011] As a preferred embodiment of the fan guard, the rear guard is provided with a plurality of abutting protrusions, which extend along the axial direction of the inner side of the rear guard. After the front guard is installed at the installation opening of the rear guard, the abutting protrusions abut against the inner end of the outer contour.

[0012] As a preferred embodiment of the fan guard, the snap-fit ​​protrusion is provided with a limiting groove, and a limiting protrusion is provided in the snap-fit ​​groove. The limiting protrusion snaps into the limiting groove to prevent the snap-fit ​​protrusion from coming out of the snap-fit ​​groove.

[0013] As a preferred embodiment of the fan guard, a plurality of air inlet mesh holes are provided on the rear side of the rear guard, and the plurality of air inlet mesh holes are arranged in multiple rings around the center position of the rear side of the rear guard. An air guiding slope is provided on the side wall of the air inlet mesh holes, and the air guiding slope is used to increase the air intake speed of the fan guard.

[0014] This utility model also provides a fan, which includes a fan guard as described in any of the above claims.

[0015] As a preferred embodiment of the fan, the fan includes: a motor rear cover; the center of the rear side of the rear cover extends rearward to form a fixing protrusion, and a fixing screw passes through the motor rear cover and extends into the fixing protrusion for fixation.

[0016] The beneficial effects of this utility model are:

[0017] This utility model proposes a fan guard and a fan, including: a rear guard and a front guard installed on the rear guard, forming a space between the front guard and the rear guard to accommodate fan blades. The front guard includes: multiple arc-shaped guide plates, which are evenly distributed outward from the center of the front guard along the circumferential direction, and the arrangement direction of the multiple arc-shaped guide plates is perpendicular to the direction of the fan blades; by providing a first air-gathering groove on the concave side of each arc-shaped guide plate, one side of the first air-gathering groove is connected to the internal space of the fan guard, and the other side of the first air-gathering groove extends smoothly to the air outlet direction of the arc-shaped guide plate, the first air-gathering groove is used to increase the speed of the airflow outward from the front guard. By adopting the above solution, the shortcomings of traditional fan guards, which cannot change the generally dispersed airflow and slow wind speed of axial flow fans and reduce the airflow volume in the same amount of time, are overcome. By cooperating with each arc-shaped guide plate and the first wind-gathering groove on it, the structure of the fan guard is improved, so that the dispersed airflow forms a spiral condensed airflow after passing through the fan guard, the airflow is concentrated, and the airflow speed of the fan guard is greatly improved, which is conducive to the promotion of fans with this fan guard installed. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of the fan provided by this utility model;

[0020] Figure 2 yes Figure 1 The cross-sectional view of the fan shown;

[0021] Figure 3 yes Figure 2 An enlarged view of the cross-sectional view of the fan shown at point A;

[0022] Figure 4 yes Figure 2 An enlarged view of the cross-sectional view of the fan shown at point B;

[0023] Figure 5 yes Figure 1 The diagram shows an explosion of a fan.

[0024] Figure 6 yes Figure 5 A schematic diagram of the structure of the front grille of the fan guard shown;

[0025] Figure 7 yes Figure 5 The diagram shows the structure of the rear grille of the fan at one angle;

[0026] Figure 8 yes Figure 7 The diagram shows a structural schematic of the rear grille of the fan from another angle. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Fans are extremely common heat dissipation and cooling devices used in various fields of life and production. There are two types of fans: axial and radial, mainly classified by the direction of airflow when the fan is working. When an axial fan is working, the blades push the air to flow in the same direction as the axis. Due to its advantages such as simple structure and large air volume, axial fans are highly adaptable and have a wide range of applications.

[0031] Axial flow fans mainly consist of an impeller and a mesh cover. The mesh cover surrounds the impeller, providing safety protection and, to some extent, increasing wind speed and guiding the airflow. Traditional fan mesh covers are made of thin iron wire or plastic material of the same shape to form a mesh structure. When the impeller rotates, the gas enters the impeller axially from the air inlet. The gas energy is increased by the pushing force of the blades on the impeller, and then the axial wind is delivered. The wind delivered by the impeller passes through the mesh cover and is blown out to the outside. The axial wind generated by an axial flow fan is generally dispersed and has a relatively slow wind speed, reducing the amount of air delivered in the same amount of time.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model provides a fan, including: a fan guard 10, and a motor rear cover 20 installed on the rear side of the fan guard 10, the motor rear cover 20 being used to cover the fan motor (not shown); the fan guard 10 includes: a rear cover 11, and a front cover 12 installed on the rear cover 11, forming a space for accommodating fan blades between the front cover 12 and the rear cover 11, the front cover 12 including: a plurality of arc-shaped guide plates 121, the plurality of arc-shaped guide plates 121 being evenly distributed outward from the center position of the front cover 12 along the circumferential direction, and the arrangement direction of the plurality of arc-shaped guide plates 121 being perpendicular to the direction of the fan blades;

[0033] In this embodiment, a first wind-gathering groove 1211 is provided on the recessed side of each of the arc-shaped guide plates 121. One side of the first wind-gathering groove 1211 is connected to the internal space of the fan grille 10, and the other side of the first wind-gathering groove 1211 extends smoothly to the air outlet direction of the arc-shaped guide plate 121. The first wind-gathering groove 1211 is used to increase the speed of the airflow from the front grille 12 outward.

[0034] In this utility model, the above-mentioned solution overcomes the shortcomings of the traditional fan guard 10, which cannot change the axial wind generated by the axial flow fan, which is generally dispersed, has a relatively slow wind speed, and reduces the air volume in the same time. By cooperating with each of the arc-shaped guide plates 121 and the first wind-gathering groove 1211 thereon, the structure of the fan guard 10 is improved, so that the dispersed wind forms a spiral condensed wind after passing through the fan guard 10, the air volume is concentrated, and the speed of the air discharged by the fan guard 10 is greatly improved, which is conducive to the promotion of fans with this fan guard 10 installed.

[0035] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in order to further improve the air exhaust speed of the fan grille 10, a guide protrusion 1212 is provided on the protruding side of each arc-shaped guide plate 121; the guide protrusion 1212 includes: a protrusion 12121 provided in the middle part of the protruding side of the arc-shaped guide plate 121 along the length direction of the arc-shaped guide plate 121, and a guide surface 12122 extending smoothly along both sides of the protrusion 12121 toward the direction of the fan blades and the air exhaust direction of the fan blades. The protrusion 12121 and the guide surface 12122 cooperate with each other to guide the air blown out by the fan blades, thereby increasing the air exhaust speed of the front grille 12.

[0036] To enhance the functionality of the fan guard 10, the front guard 12 further includes: a fixing center 122, an aromatherapy disc 123, and an aromatherapy cover 124; the fixing center 122 is located at the center of the plurality of arc-shaped guide plates 121 and is integrally formed with one end of each arc-shaped guide plate 121; the fixing center 122 is recessed inward to form a receiving groove 1221, the aromatherapy disc 123 is received in the receiving groove 1221, and the aromatherapy cover 124 is installed at the opening of the receiving groove 1221; the bottom of the receiving groove 1221 is provided with an air inlet 12211, and the aromatherapy cover 124 is provided with an air outlet 1241. The air blown out by the fan blades passes sequentially through the air inlet 12211, the surface of the aromatherapy disc 123, and the air outlet 1241 before being blown out to the outside, thereby enabling the fan guard 10 to also have an aromatherapy function.

[0037] To further improve the exhaust speed of the front grille 12, the front grille 12 further includes: an outer contour 125; the outer contour 125 surrounds the other end of the plurality of arc-shaped guide plates 121 and is integrally formed with each of the arc-shaped guide plates 121; a second air-gathering groove 1251 is provided on the inner side of the outer contour 125 at a position between two adjacent arc-shaped guide plates 121, one end of the second air-gathering groove 1251 is connected to the internal space of the fan grille 10, and the other end of the second air-gathering groove 1251 extends smoothly to the air outlet direction of the outer contour 125. The outer contour 125 and the second air-gathering groove 1251 thereon cooperate with each other to further improve the exhaust speed of the front grille 12.

[0038] In order to install the front mesh cover 12, a plurality of snap-fit ​​grooves 1252 are provided on the outer side of the outer contour 125, and an installation opening 111 is provided on the front side of the rear mesh cover 11. A plurality of snap-fit ​​protrusions 1111 are provided on the inner side of the installation opening 111. After the snap-fit ​​protrusions 1111 snap into the corresponding snap-fit ​​grooves 1252, the front mesh cover 12 is installed at the installation opening 111 of the rear mesh cover 11.

[0039] In order to position the installation of the front mesh cover 12, the rear mesh cover 11 is provided with a plurality of abutting protrusions 112. The abutting protrusions 112 extend along the axial direction of the inner side of the rear mesh cover 11. After the front mesh cover 12 is installed at the installation opening 111 of the rear mesh cover 11, the abutting protrusions 112 abut against the inner end of the outer contour 125.

[0040] In order to limit the installation of the front mesh cover 12, the snap-fit ​​protrusion 1111 is provided with a limiting slot 11111, and the snap-fit ​​slot 1252 is provided with a limiting protrusion 12521. The limiting protrusion 12521 snaps into the limiting slot to prevent the snap-fit ​​protrusion 1111 from coming out of the snap-fit ​​slot 1252.

[0041] To increase the air intake speed of the rear screen 11, a plurality of air intake mesh holes 113 are provided on the rear side of the rear screen 11. The plurality of air intake mesh holes 113 are arranged in multiple rings around the center position of the rear side of the rear screen 11. A guide slope 1131 is provided on the side wall of the air intake mesh hole 113. The guide slope 1131 is used to increase the air intake speed of the fan screen 10.

[0042] In order to install the motor rear cover 20, the center position of the rear side of the rear mesh cover 11 extends rearward to form a fixing protrusion 114. The fixing screw passes through the motor rear cover 20 and extends into the fixing protrusion 114 for fixing, thereby fixing the motor rear cover 20 to the rear side of the rear mesh cover 11.

[0043] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this invention, and these variations still fall within the protection scope of this utility model.

Claims

1. A fan guard, characterized in that, include: A rear grille and a front grille installed on the rear grille form a space between the front grille and the rear grille to accommodate fan blades. The front grille includes a plurality of arc-shaped guide vanes, which are evenly distributed outward from the center of the front grille along the circumferential direction, and the arrangement direction of the plurality of arc-shaped guide vanes is perpendicular to the direction of the fan blades. In this embodiment, a first wind-gathering groove is provided on the recessed side of each of the arc-shaped guide plates. One side of the first wind-gathering groove is connected to the internal space of the fan grille, and the other side of the first wind-gathering groove extends smoothly to the air outlet direction of the arc-shaped guide plate. The first wind-gathering groove is used to increase the speed of the airflow from the front grille.

2. The fan guard as described in claim 1, characterized in that, Each of the aforementioned arc-shaped guide vanes has a guide protrusion on its protruding side; The air guide protrusion includes: a protrusion located at the middle part of the protruding side of the arc-shaped air guide plate along the length of the arc-shaped air guide plate, and air guide surfaces extending smoothly along both sides of the protrusion towards the direction of the fan blades and the air outlet direction of the fan blades. The protrusion and the air guide surfaces cooperate with each other to guide the air blown out by the fan blades.

3. The fan guard as described in claim 1, characterized in that, The front mesh cover also includes: a fixing center, an aromatherapy pad, and an aromatherapy cover plate; The fixed center is located at the center position surrounded by the plurality of arc-shaped guide plates and is integrally formed with one end of each arc-shaped guide plate; The fixed center is recessed inward to form a receiving groove, the aromatherapy tablet is received in the receiving groove, and the aromatherapy cover is installed at the opening of the receiving groove; The bottom of the container is provided with an air inlet, and the aromatherapy cover is provided with an air outlet. The air blown out by the fan blades passes through the air inlet, the surface of the aromatherapy tablet, and the air outlet in sequence before being blown out to the outside.

4. The fan guard as described in claim 1, characterized in that, The front mesh cover also includes: an outer contour; The outer contour surrounds the other end of the plurality of arc-shaped guide plates and is integrally formed with each of the arc-shaped guide plates; The inner side of the outer contour is provided with a second air-gathering groove located between two adjacent arc-shaped guide plates. One end of the second air-gathering groove is connected to the internal space of the fan grille, and the other end of the second air-gathering groove extends smoothly to the air outlet direction of the outer contour.

5. The fan guard as described in claim 4, characterized in that, The outer contour has multiple snap-fit ​​grooves on its outer side, and the front side of the rear mesh cover has an installation opening. The inner side of the installation opening has multiple snap-fit ​​protrusions. After the snap-fit ​​protrusions snap into the corresponding snap-fit ​​grooves, the front mesh cover is installed at the installation opening of the rear mesh cover.

6. The fan guard as described in claim 5, characterized in that, The rear mesh cover has multiple abutting protrusions that extend axially along the inner side of the rear mesh cover. After the front mesh cover is installed at the installation opening of the rear mesh cover, the abutting protrusions abut against the inner end of the outer contour.

7. The fan guard as described in claim 5, characterized in that, The snap-fit ​​protrusion is provided with a limiting slot, and a limiting protrusion is provided in the snap-fit ​​slot. The limiting protrusion snaps into the limiting slot to prevent the snap-fit ​​protrusion from coming out of the snap-fit ​​slot.

8. The fan guard as described in claim 5, characterized in that, Multiple air inlet holes are provided on the rear side of the rear mesh cover. The multiple air inlet holes are arranged in multiple rings around the center of the rear side of the rear mesh cover. An air guide slope is provided on the side wall of the air inlet holes. The air guide slope is used to increase the air intake speed of the fan mesh cover.

9. A fan, characterized in that, Includes the fan guard as described in any one of claims 1-8.

10. The fan as claimed in claim 9, characterized in that, The fan includes: a motor rear cover; The center of the rear side of the rear mesh cover extends backward to form a fixing protrusion, and the fixing screw passes through the rear cover of the motor and extends into the fixing protrusion for fixation.

Images