The mesh structure and the fan with it

Abstract

This invention provides a mesh cover structure and an electric fan having the same. The mesh cover structure is used to connect to a fan and includes: a first grille with a mounting opening where the fan motor is mounted; a second grille disposed on the first grille, the second grille and the first grille forming a receiving cavity for housing the fan blades; and an elastic element disposed on the first grille. The technical solution provided by this invention solves the problem of severe swaying of the mesh cover structure in existing electric fans during operation.

Description

Technical Field

[0001] This invention relates to the field of small household appliance technology, and more specifically, to a mesh cover structure and an electric fan having the same. Background Technology

[0002] Currently, in the existing fan product line, most fans are composed of a fan head, a fan, a mesh structure, a support frame, and a base. The fan blades rotate under the drive of the motor and the air is discharged through the mesh in the direction of axial flow.

[0003] However, during the operation of the fan blades driven by the motor, they are affected by various factors such as wind pressure, motor and injection molding process, resulting in motion imbalance. This motion imbalance inertial excitation will act on the head assembly, which in turn affects the swaying of the grille. The swaying of the grille will affect the vibration of the motor frame, and in severe cases, it may even cause the whole machine to resonate. Summary of the Invention

[0004] The main objective of this invention is to provide a mesh cover structure and an electric fan having the same, so as to solve the problem of severe shaking of the mesh cover structure in the electric fan during operation in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a mesh cover structure is provided for connection with a fan. The mesh cover structure includes: a first grille having an installation opening at which the motor of the fan is installed; a second grille disposed on the first grille, the second grille and the first grille forming a receiving cavity for housing the fan blades; and an elastic member disposed on the first grille.

[0006] Furthermore, the first grid includes: a first rib connected to the second grid; an end cap disposed on the side of the first rib away from the second grid, the end cap having an installation opening, and an elastic element disposed on the end cap.

[0007] Furthermore, the end cap is provided with a mounting groove, and the elastic element is disposed in the mounting groove.

[0008] Furthermore, the elastic element is located between the end cap and the first rib.

[0009] Furthermore, the elastic element is a ring structure, which surrounds the outer edge of the end cap.

[0010] Furthermore, the elastic element is an annular washer, and the annular washer is provided with a buffer groove.

[0011] Furthermore, the elastic element is a spring, with one end of the spring connected to the end cap and the other end of the spring connected to the first rib.

[0012] Furthermore, the end cap has a first surface and a second surface disposed opposite to each other, the second surface being disposed on the side of the first surface away from the second grid; the elastic member has a third surface and a fourth surface disposed opposite to each other, the fourth surface being disposed on the side of the third surface away from the second grid; the first rib has a fifth surface and a sixth surface disposed opposite to each other, the sixth surface being disposed on the side of the fifth surface away from the second grid; the first surface and the third surface are in a smooth transition; and / or, the third surface and the fifth surface are in a smooth transition.

[0013] Furthermore, the first surface and the third surface are disposed flush with each other; and / or, the third surface and the fifth surface are disposed flush with each other.

[0014] Furthermore, the elastic element is installed on the first grid using a rubber-coating process.

[0015] Furthermore, the first grid is provided with a first snap-fit ​​structure, and the elastic member is provided with a second snap-fit ​​structure adapted to the first snap-fit ​​structure. The first snap-fit ​​structure and the second snap-fit ​​structure snap-fit ​​together so that the elastic member is installed on the first grid.

[0016] Furthermore, a first latch is provided on one side of the elastic member, a second latch is provided on the other side of the elastic member, a first hook is provided on the first rib, and the first hook engages with the first latch; a second hook is provided on the end cap, and the second hook engages with the second latch.

[0017] Furthermore, the mesh structure also includes a first locking member and a second locking member. The first locking member passes through the side wall of the first rib and connects to one side of the elastic member, while the second locking member passes through the side wall of the end cap and connects to the other side of the elastic member.

[0018] According to another aspect of the present invention, an electric fan is provided, comprising: a mesh structure, the mesh structure being the mesh structure provided above; fan blades and a motor, the fan blades being disposed within the mesh structure and the motor being drivenly connected to the fan blades; a housing disposed on the mesh structure, the motor being mounted on the housing; and a support frame, the housing being disposed on the support frame.

[0019] By applying the technical solution of this invention, since an elastic element is provided on the first grille and the motor of the fan is connected to the first grille, the vibration and swaying of the first grille can be reduced under the elastic buffering effect of the elastic element, thereby also reducing the vibration and swaying of the second grille. Therefore, the mesh cover structure provided in this embodiment can solve the problem of severe swaying of the mesh cover structure of the existing fan during operation. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 A schematic diagram of the structure of an electric fan according to an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of the structure of a first grille according to an embodiment of the present invention is shown;

[0023] Figure 3 A side view of a first grille provided according to an embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of an elastic member with a second snap-fit ​​structure provided according to an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of a first grille provided with a first locking member and a second locking member according to an embodiment of the present invention is shown.

[0026] The above figures include the following reference numerals:

[0027] 11. First grille; 111. First rib; 1111. Fifth surface; 1112. Sixth surface; 112. End cap; 1121. First surface; 1122. Second surface; 12. Second grille; 13. Elastic element; 131. Third surface; 132. Fourth surface; 133. Second snap-fit ​​structure; 20. Motor; 30. Fan blade; 40. Cover; 50. Housing; 60. Support frame; 71. First locking element; 72. Second locking element. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figures 1 to 5 As shown, an embodiment of the present invention provides a mesh cover structure for connection with a fan. The mesh cover structure includes a first grille 11, a second grille 12, and an elastic member 13. The first grille 11 has a mounting opening where the fan motor 20 is mounted. The second grille 12 is disposed on the first grille 11, and the second grille 12 and the first grille 11 form a receiving cavity for housing the fan blades 30. The elastic member 13 is disposed on the first grille 11.

[0030] The mesh cover structure provided in this embodiment, with an elastic element 13 on the first grille 11 and the fan motor 20 connected to the first grille 11, reduces the vibration and swaying of the first grille 11 under the elastic buffering effect of the elastic element 13, thereby also reducing the vibration and swaying of the second grille 12. Therefore, the mesh cover structure provided in this embodiment can solve the problem of severe swaying of the mesh cover structure during operation of the existing fan.

[0031] Specifically, in this embodiment, the first grille 11 includes a first rib 111 and an end cap. The first rib 111 is connected to the second grille 12, and the end cap is located on the side of the first rib 111 away from the second grille 12. The end cap has an installation opening, and an elastic element 13 is disposed on the end cap. Specifically, the fan motor 20 is connected to the end cap. This structural arrangement facilitates better reduction of vibration and swaying of the first grille 11 under the elastic buffering effect of the elastic element 13.

[0032] Specifically, a mounting groove can be provided on the end cap, and the elastic element 13 is disposed within the mounting groove. This structural arrangement can improve the installation stability of the elastic element 13.

[0033] In this embodiment, the elastic element 13 is located between the end cap and the first rib 111. This structural arrangement prevents vibrations and swaying on the end cap from being transmitted to the first rib 111, thereby reducing the swaying of the first rib 111 and also better reducing the swaying of the second grille 12. Specifically, in this embodiment, the second rib is connected to the first rib 111. There are multiple first ribs 111, spaced apart around the periphery of the end cap. There are also multiple second ribs, spaced apart, to facilitate the flow of indoor air between the gaps between the multiple first ribs 111 and the multiple second ribs.

[0034] In this embodiment, the elastic element 13 is a ring structure that surrounds the outer edge of the end cap. This structural arrangement facilitates better shock absorption, thus better preventing vibrations and swaying on the end cap from being transmitted to the first rib 111, thereby reducing the overall swaying of the mesh structure.

[0035] Specifically, the elastic element 13 can be an annular washer with a buffer groove. Specifically, there can be multiple buffer grooves, which are spaced and rotated. When the end cover vibrates or shakes due to the vibration of the motor 20, the buffer grooves are compressed and effectively provide elastic cushioning, thereby reducing the vibration and shaking of the first grille 11.

[0036] Alternatively, the elastic element 13 can be a spring, with one end connected to the end cap and the other end connected to the first rib 111. This structural arrangement effectively buffers and dampens shocks under the elastic force of the spring.

[0037] Specifically, the end cap has a first surface 1121 and a second surface 1122 disposed opposite to each other, the second surface 1122 being disposed on the side of the first surface 1121 away from the second grille 12, the elastic member 13 has a third surface 131 and a fourth surface 132 disposed opposite to each other, the fourth surface 132 being located on the side of the third surface 131 away from the second grille 12, and the first rib 111 has a fifth surface 1111 and a sixth surface 1112 disposed opposite to each other, the sixth surface 1112 being located on the side of the fifth surface 1111 away from the second grille 12.

[0038] Specifically, the first surface 1121 and the third surface 131 can have a smooth transition; or, the third surface 131 and the fifth surface 1111 can have a smooth transition; or, the first surface 1121 and the third surface 131 can have a smooth transition, and the third surface 131 and the fifth surface 1111 can have a smooth transition. Specifically, a smooth transition structure here means that adjacent surfaces can be flush or have a rounded transition at the junction. This improves the consistency and flatness of the appearance structure, enhancing its aesthetic appeal.

[0039] Preferably, in this embodiment, the first surface 1121 and the third surface 131 have a smooth transition, and the third surface 131 and the fifth surface 1111 have a smooth transition. This structural arrangement ensures the consistency and flatness of the appearance of the end cap, the elastic element 13, and the first rib 111, thus guaranteeing an aesthetically pleasing appearance.

[0040] Specifically, the first surface 1121 and the third surface 131 can be arranged flush with each other; or the third surface 131 and the fifth surface 1111 can be arranged flush with each other; or the first surface 1121 and the third surface 131 can be arranged flush with each other, and the third surface 131 and the fifth surface 1111 can be arranged flush with each other.

[0041] Preferably, in this embodiment, the first surface 1121, the third surface 131, and the fifth surface 1111 are all planar structures, with the first surface 1121 and the third surface 131 being flush with each other, and the third surface 131 and the fifth surface 1111 being flush with each other. This structural arrangement further ensures the consistency and flatness of the appearance of the end cap, the elastic element 13, and the first rib 111.

[0042] Specifically, the mesh cover structure in this embodiment adopts a layered grid design. The inertial excitation from the fan blade 30 will affect the vibration of the motor 20. The vibration generated by the motor 20 will synchronously affect the motor 20 mounting bracket. Since the front cover 50 of the motor 20 is fixed to the mesh cover structure, and the size and weight of the fan mesh cover structure are generally large, even slight shaking of the mesh cover structure will directly cause the entire machine to shake. By using a layered mesh cover design with low-fixed-frequency elastic material, the vibration from the cover 40 of the motor 20 mounting bracket is isolated. The vibration of the mesh cover structure is greatly reduced, so that the vibration of the mesh cover structure cannot reach the resonant fixed frequency of the entire machine. This eliminates the resonance of the entire machine, thereby achieving stable operation of the fan.

[0043] The mesh structure in this embodiment is applied to an electric fan, which also includes a cover 40, a casing 50, and a support frame 60. When the motor 20 starts driving the fan blades 30 to rotate, the fan blades 30 generate axial airflow through rotation, creating a rotating wind. Therefore, the air also exerts a reverse thrust on the fan blades 30, the frequency of which is the same as the blade frequency of the fan blades 30. Simultaneously, the fan blades 30 generate inertial vibration excitation due to motion imbalance; the frequency of this inertial force is the same as the natural fundamental frequency of the fan blades 30. Since the reverse thrust of the air is very small, its impact on the electric fan is minimal. Therefore, the main vibration point is caused by the motion imbalance of the fan blades 30.

[0044] The fan blade 30 is the vibration source of the entire fan. This vibration source transmits the vibration excitation in reverse to the motor 20 through the fan blade 30 fixing component. The motor 20 then transmits the inertial excitation to the housing 50, the first grille 11, and the second grille 12 through the cover 40. This vibration causes severe shaking of the support frame 60, the first grille 11, and the second grille 12 from the user's first-person perspective. Since the shaking is mainly caused by the inertial excitation of the fan blade 30, and this inertial excitation is the same as the fan's fundamental frequency, adjusting the fan's fundamental frequency can effectively reduce the overall machine's shaking. Because the vibration has the most severe impact on the mesh structure and the support frame 60 during transmission, and the vibration is transmitted from the mesh structure to the support frame 60, with the mesh structure experiencing the most severe vibration, reducing the vibration frequency of the mesh structure can effectively weaken the overall machine's vibration. This invention adds an elastic element 13 to the original mesh structure by using a rubber coating method, lowering the natural frequency of the mesh structure and achieving vibration isolation and reduction effects.

[0045] In this embodiment, the first grille 11 includes an elastic element 13, a first rib 111, and an end cap. Vibration excitation is transmitted from the cover 40 to the end cap. The elastic element 13 is attached to the mesh structure by an adhesive coating method. Experiments show that the fan vibrates most severely at high speeds. Because the vibration guided by inertial excitation manifests as left-right and up-down swaying on the mesh structure, the corresponding solid frequencies of the mesh structure are 3rd and 4th order, respectively. As shown in the table below, after adding the elastic element 13, the vibration solid frequency of the mesh decreases to 7 / 17.

[0046] Original mesh structure The mesh structure after adding elastic element 13 Third order (Hz) 21.52 7.42 Fourth order (Hz) 35.65 17.06

[0047] According to experimental tests, after replacing the mesh structure with the elastic element 13, the maximum vibration of the fan blade 30 decreased from 1.95mm to 0.522mm, and the vibration was significantly reduced.

[0048] In this embodiment, the elastic element 13 is made of materials including but not limited to elastic silicone, and its structural shape can also be in the form of a spring damping mechanism. The optimal connection method for the elastic element 13 is to attach it to the mesh ring using an overmolding process. However, it is not limited to this process. Welding, structural component clips, and screws are also acceptable methods. The outer surface of the elastic element 13 needs to be flush with the outer surface of the grid ribs and the grid end cap to ensure consistency in appearance, but it is not limited to this. Its inner surface can have a concave structure. Specifically, in this embodiment, the elastic element 13 can be located at any position on the first grid 11, not limited to the end cap.

[0049] In one embodiment, the elastic element 13 can be installed on the first grid 11 using an overmolding process.

[0050] In another embodiment, a first snap-fit ​​structure is provided on the first grille 11, and a second snap-fit ​​structure 133 adapted to the first snap-fit ​​structure is provided on the elastic member 13. The first snap-fit ​​structure and the second snap-fit ​​structure 133 snap-fit ​​together to install the elastic member 13 onto the first grille 11. The above structure is simple, the connection is reliable, and it is easy to manufacture.

[0051] Specifically, in this embodiment, a first latch is provided on one side of the elastic element 13, and a second latch is provided on the other side of the elastic element 13. A first hook is provided on the first rib 111, and the first hook engages with the first latch. A second hook is provided on the end cap 112, and the second hook engages with the second latch. This structural arrangement can further improve the reliability of the connection.

[0052] In another embodiment, the mesh cover structure further includes a first locking member 71 and a second locking member 72. The first locking member 71 passes through the side wall of the first rib 111 and connects to one side of the elastic member 13, while the second locking member 72 passes through the side wall of the end cap 112 and connects to the other side of the elastic member 13. This structural arrangement prevents the first locking member 71 and the second locking member 72 from being exposed, ensuring a smooth appearance and the stability of the elastic member 13. Specifically, in this embodiment, the end face of the first locking member 71 is flush with the side wall of the first rib 111, and the end face of the second locking member 72 is flush with the side wall of the end cap 112, further improving the smoothness of the product appearance. Both the first locking member 71 and the second locking member 72 can be countersunk screws.

[0053] Another embodiment of the present invention provides an electric fan, which includes a mesh structure, fan blades, a motor, a housing, and a support frame. The mesh structure is the same as the one provided in the above embodiment; the fan blades are disposed within the mesh structure, and the motor is driven and connected to the fan blades. The housing is disposed on the mesh structure, the motor is mounted on the housing, and the housing is disposed on the support frame.

[0054] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: by adjusting the structure of the mesh cover, the inertial excitation provided by the fan blades can be weakened, the shaking of the fan mesh cover ring and the swaying of the fan support rod can be reduced, and the resonance of the whole machine can be avoided.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0057] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0058] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0059] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mesh cover structure, characterized in that, The mesh cover structure is used for connection with the fan, and the mesh cover structure includes: The first grille (11) has an installation port, and the motor (20) of the fan is installed at the installation port; The second grille (12) is disposed on the first grille (11), and the second grille (12) and the first grille (11) form a receiving cavity, which is used to place the fan blades (30). An elastic element (13) is disposed on the first grille (11); The first grid (11) includes: a first rib (111) connected to the second grid (12); an end cap (112) disposed on the side of the first rib (111) away from the second grid (12), the end cap (112) being provided with the mounting port, and the elastic element (13) being disposed on the end cap (112); The elastic element (13) is located between the end cap (112) and the first rib (111); The elastic element (13) is a ring structure, which is arranged around the outer edge of the end cap (112); The elastic element (13) is an annular washer with a buffer groove. The first grid (11) is provided with a first snap-fit ​​structure, and the elastic element (13) is provided with a second snap-fit ​​structure (133) that is adapted to the first snap-fit ​​structure. The first snap-fit ​​structure and the second snap-fit ​​structure (133) snap-fit ​​together so that the elastic element (13) is installed on the first grid (11). The elastic element (13) has a first latch on one side and a second latch on the other side. The first rib (111) has a first hook, which engages with the first latch. The end cap (112) has a second hook, which engages with the second latch.

2. The mesh cover structure according to claim 1, characterized in that, The end cap (112) is provided with an installation groove, and the elastic element (13) is disposed in the installation groove.

3. The mesh cover structure according to claim 1, characterized in that, The end cap (112) has a first surface (1121) and a second surface (1122) disposed opposite to each other, the second surface (1122) being disposed on the side of the first surface (1121) away from the second grille (12); the elastic member (13) has a third surface (131) and a fourth surface (132) disposed opposite to each other, the fourth surface (132) being located on the side of the third surface (131) away from the second grille (12); the first rib (111) has a fifth surface (1111) and a sixth surface (1112) disposed opposite to each other, the sixth surface (1112) being located on the side of the fifth surface (1111) away from the second grille (12); The first surface (1121) and the third surface (131) have a smooth transition; and / or, The third surface (131) and the fifth surface (1111) have a smooth transition.

4. The mesh cover structure according to claim 3, characterized in that, The first surface (1121) and the third surface (131) are disposed flush with each other; and / or, The third surface (131) and the fifth surface (1111) are arranged flush with each other.

5. The mesh cover structure according to any one of claims 1 to 4, characterized in that, The elastic element (13) is installed on the first grid (11) using a rubber coating process.

6. The mesh cover structure according to claim 1, characterized in that, The mesh structure also includes a first locking member (71) and a second locking member (72). The first locking member (71) passes through the side wall of the first rib (111) and is connected to one side of the elastic member (13). The second locking member (72) passes through the side wall of the end cap (112) and is connected to the other side of the elastic member (13).

7. An electric fan, characterized in that, The electric fan includes: A mesh structure, wherein the mesh structure is the mesh structure according to any one of claims 1 to 6; A fan blade (30) and a motor (20), wherein the fan blade (30) is disposed within the mesh structure and the motor (20) is drivenly connected to the fan blade (30); A housing (50) is disposed on the mesh structure, and the motor (20) is mounted on the housing (50); A support frame (60) is provided on the cover (50).

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