CN219139413U

CN219139413U - Heat radiation fan

Info

Publication number: CN219139413U
Application number: CN202223282160.9U
Authority: CN
Inventors: 陈森达; 杜智鹏
Original assignee: SHENZHEN BITLAND INFORMATION TECHNOLOGY CO LTD
Current assignee: SHENZHEN BITLAND INFORMATION TECHNOLOGY CO LTD
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-06-06
Anticipated expiration: 2032-12-07

Abstract

The utility model discloses a cooling fan, which comprises a shell, a fan blade assembly and an upper cover, wherein the shell is provided with an installation cavity with an upward opening, the fan blade assembly comprises fan blades, the fan blades are installed in the installation cavity along the upper and lower axial directions, the upper cover is used for covering the installation cavity, and the upper cover is at least arranged in a concave manner corresponding to the inner side surface of the part of the fan blades so as to form a bulge at the outer side surface of the upper cover. According to the technical scheme, the upper cover is concavely arranged at least corresponding to the inner side surface of the part of the fan blade so as to form the outwards protrusion on the outer side surface of the upper cover, the radiating fan is contacted with the impact part of the notebook computer through the protrusion, the protruding arrangement reduces the overhanging area of the upper cover, the strength of the upper cover is improved, the deformation resistance of the upper cover is improved, the upper cover is prevented from being deformed too early in the knocking process of the notebook computer keyboard, meanwhile, the protrusion also leaves a space for the deformation of the upper cover, and the deformed upper cover is prevented from being contacted with the fan blade, so that abnormal sound of the radiating fan is caused.

Description

Heat radiation fan

Technical Field

The utility model relates to the technical field of heat dissipation, in particular to a heat dissipation fan.

Background

At present, notebook computers are widely applied in life, and no matter what game entertainment, study and work and the like are, a quiet and comfortable environment is expected to be obtained, and the abnormal sound of a fan has a serious influence on the environment. Due to the light and thin design of the notebook computer, when the keyboard is knocked during typing and playing games, the fan is pressed by external force, slight deformation of the structure is easy to occur, and when pressure is on the notebook fan, the deformation of the shell is easy to contact with fan blades, so that abnormal sound is caused, and user experience is affected.

Disclosure of Invention

The utility model mainly aims to provide a cooling fan, which aims to solve the problem that abnormal sound can occur when the cooling fan is used for a long time.

In order to achieve the above object, a cooling fan according to the present utility model includes:

a housing formed with an installation cavity with an upward opening;

the fan blade assembly comprises fan blades, and the fan blades are arranged in the mounting cavity along the upper and lower axial directions; the method comprises the steps of,

the upper cover is used for covering the mounting cavity;

the upper cover is at least concavely arranged on the inner side surface of the part of the fan blade correspondingly, so that a bulge is formed on the outer side surface of the upper cover.

Optionally, the protrusion is formed with a rounded corner along its circumference, and the radius of the rounded corner is A, and A is more than or equal to 0.4mm and less than or equal to 0.6mm.

Optionally, the cross section of the bulge is provided with a circle, and the radius of the circle is B;

the rotating radius of the fan blade is C, and B-C is more than or equal to 0.5mm and less than or equal to 0.7mm.

Optionally, the height of the inner surface of the protrusion from the fan blade is D, and D is more than or equal to 2.1mm and less than or equal to 2.3mm.

Optionally, the material of the housing and/or the upper cover comprises plastic.

Optionally, an air inlet and a plurality of turbulence holes are formed in the bottom of the mounting cavity, and the turbulence holes are circumferentially distributed along the air inlet.

Optionally, the cooling fan further comprises a dust screen, and the dust screen is arranged at the air inlet.

Optionally, the number of the blades of the fan blade is set to be singular.

Optionally, the fan blade assembly further includes:

the rotating shaft is rotatably arranged in the mounting cavity; the method comprises the steps of,

the rotation stopping connection structure comprises a rotation stopping concave part and a rotation stopping convex part which are matched with each other, wherein one of the rotation stopping concave part and the rotation stopping convex part is arranged on the rotating shaft, and the other is arranged on the fan blade.

Optionally, the fan blade assembly further comprises a driving assembly, wherein the driving assembly comprises an electromagnetic coil and a magnet structure which can mutually rotate after being electrified;

the electromagnetic coil is arranged on the shell;

the magnet structure is arranged on the rotating shaft.

According to the technical scheme, the upper cover is concavely arranged at least corresponding to the inner side surface of the part of the fan blade so as to form an outward bulge on the outer side surface of the upper cover, the radiating fan is contacted with the impact part of the notebook computer through the bulge, compared with the whole suspension of the traditional whole upper cover, the arrangement of the bulge reduces the suspension area of the upper cover, improves the strength of the upper cover, increases the deformation resistance of the upper cover, avoids the upper cover from being deformed too early in the knocking process of the notebook computer keyboard, and simultaneously leaves a space for the deformation of the upper cover, and prevents the deformed upper cover from being contacted with the fan blade, so that abnormal response of the radiating fan is caused.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a heat dissipating fan according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

FIG. 4 is a schematic view of the upper cover of FIG. 1;

fig. 5 is a schematic view of the structure of the housing in fig. 1.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				1000	Heat radiation fan	22	Rotating shaft
1	Outer casing	23	Rotation-stopping connection structure
				11	Mounting cavity	231	Rotation-stopping concave part
111	Air inlet	232	Anti-rotation convex part
				112	Turbulent flow hole	3	Upper cover
2	Fan blade assembly	31	Protrusions
				21	Fan blade

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In order to solve the above-mentioned problems, the present utility model provides a heat dissipating fan, which is designed to solve the problem that abnormal sound occurs when the heat dissipating fan is used for a long time, wherein fig. 1 to 5 are schematic structural diagrams of an embodiment of the heat dissipating fan provided by the present utility model.

Referring to fig. 1, 2 and 4, the cooling fan 1000 includes a housing 1, a fan blade assembly 2 and an upper cover 3, the housing 1 is formed with an installation cavity 11 with an upward opening, the fan blade assembly 2 includes a fan blade 21, the fan blade 21 is installed in the installation cavity 11 along an up-down axial direction, and the upper cover 3 is used for covering the installation cavity 11, where the upper cover 3 is at least correspondingly recessed from an inner side surface of a portion of the fan blade 21 to form a protrusion 31 at an outer side surface of the upper cover 3.

In the technical scheme of the utility model, the upper cover 3 is concavely arranged at least corresponding to the inner side surface of the part of the fan blade 21 so as to form an outwards convex part 31 on the outer side surface of the upper cover 3, the cooling fan 1000 contacts with the notebook computer impact part through the convex part 31, compared with the whole suspension of the traditional whole upper cover 3, the arrangement of the convex part 31 reduces the suspension area of the upper cover 3, improves the strength of the upper cover 3, increases the deformation resistance of the upper cover 3, avoids the upper cover 3 from being deformed prematurely in the knocking process of the notebook computer keyboard, and simultaneously, the convex part 31 also leaves a space for the deformation of the upper cover 3 so as to prevent the deformed upper cover 3 from contacting with the fan blade 21, thereby leading to abnormal noise of the cooling fan 1000.

It should be understood that, in order to leave a deformation gap between the upper cover 3 and the fan blade 21, the protrusion 31 may cover the entire upper cover 3, or may cover only the portion of the upper cover 3 corresponding to the fan blade 21, please refer to fig. 2 and fig. 4, in an embodiment of the present utility model, the protrusion 31 partially covers the upper cover 3, and a radius of the protrusion is a,0.4mm is less than or equal to 0.6mm, preferably, when a=0.5 mm, the strength of the protrusion 31 is best for the upper cover 3.

The cross-sectional shape of the protrusion 31 may be square or circular, which is not limited in the present utility model, and in an embodiment of the present utility model, the cross-sectional shape of the protrusion 31 is circular, and it is understood that the larger the area of the protrusion 31 is, the poorer the deformation resistance that the protrusion 31 can withstand, so in a further embodiment of the present utility model, the radius of the circular shape is B, the radius of rotation of the fan blade 21 is C, and B-C is 0.5mm or less and 0.7mm or less, preferably, when the difference between the radius of the cross-section of the circular protrusion 31 and the radius of rotation of the fan blade 21 is 0.6mm, the deformation resistance of the protrusion 31 is ensured, and a sufficient deformable space is ensured between the upper cover 3 and the fan blade 21.

It will be appreciated that the greater the height of the protrusion 31, the greater the deformable space between the upper cover 3 and the fan blade 21, however, the greater the height of the protrusion 31, the poorer the deformation resistance of the protrusion 31, so that in one embodiment of the present utility model, the height D of the inner surface of the protrusion 31 from the fan blade 21 is 2.1mm < D < 2.3mm, preferably, when d=2.2 mm, the protrusion 31 can both be compatible with the deformable space between the fan blade 21 and ensure the strength of the upper cover 3.

The upper cover 3 may be made of metal or plastic, and considering that the plastic has a light weight, in an embodiment of the present utility model, the upper cover 3 is made of plastic.

Referring to fig. 5, in an embodiment of the present utility model, a plurality of zigzag turbulence holes 112 are arranged along the circumferential direction of the air inlet 111 to turbulence the air flow sucked into the cooling fan 1000, so as to avoid vortex separation caused by unstable waves in the laminar boundary layer and reduce noise of the cooling fan 1000. Further, in still another embodiment of the present utility model, the number of blades of the fan blades 21 is set to be singular, so that the fan blades 21 are asymmetrically distributed in the installation cavity 11, resonance between the blades of the fan blades 21 and air is reduced, noise of the cooling fan 1000 is reduced, and stability of operation of the cooling fan 1000 is improved.

To prevent dust from entering the installation cavity 11 through the air inlet 111, in an embodiment of the present utility model, the air inlet 111 is covered with a dust screen (not shown in the drawing) to prevent dust in air from entering the installation cavity 11, resulting in dust accumulation of the fan assembly.

The fan blade assembly 2 further comprises a rotating shaft 22 and a rotation stopping connection structure 23, the rotating shaft 22 is rotatably installed in the installation cavity 11, the rotation stopping connection structure 23 comprises a rotation stopping concave part 231 and a rotation stopping convex part 232 which are matched with each other, one of the rotation stopping concave part 231 and the rotation stopping convex part 232 is arranged on the rotating shaft 22, the other is arranged on the fan blade 21, in one embodiment of the utility model, the rotation stopping concave part 231 is arranged on the rotating shaft 22, the rotation stopping convex part 232 is arranged on the fan blade 21, so that the fan blade 21 is installed on the wheel shaft, meanwhile, the rotation stopping convex part 232 can be a rigid piece or an elastic piece, in another embodiment of the utility model, the rotation stopping convex part 232 is arranged elastically, and therefore, the fan blade 21 can be clamped in the rotation stopping concave part 231 through the elastic rotation stopping convex part 232.

The fan blade assembly 2 further comprises a driving assembly for driving the fan blade 21 to rotate, specifically, the driving assembly comprises an electromagnetic coil and a magnet structure, wherein the electromagnetic coil and the magnet structure can rotate mutually after being electrified, the electromagnetic coil is arranged on the housing 1, and the magnet structure is arranged on the rotating shaft 22, so that the electromagnetic coil is driven to change in magnetic poles through the change of current of the electromagnetic coil, so that the rotating shaft 22 is driven to rotate.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A cooling fan, comprising:

a housing formed with an installation cavity with an upward opening;

the upper cover is used for covering the mounting cavity;

2. The heat dissipating fan of claim 1, wherein the protrusion is formed with a rounded corner along its circumferential direction, and the rounded corner has a radius a of 0.4 mm.ltoreq.a.ltoreq.0.6 mm.

3. The heat radiation fan as claimed in claim 1, wherein the convex section is provided in a circular shape having a radius B;

4. The cooling fan of claim 1, wherein the height of the inner surface of the protrusion from the blade is D, and D is 2.1 mm-2.3 mm.

5. The cooling fan of claim 1, wherein the material of the housing and/or the upper cover comprises plastic.

6. The cooling fan as claimed in claim 1, wherein the mounting chamber is provided at a bottom thereof with an air inlet and a plurality of turbulence holes, and a plurality of the turbulence holes are circumferentially arranged along the air inlet.

7. The cooling fan of claim 6, further comprising a dust screen disposed at the air inlet.

8. The cooling fan as claimed in claim 1, wherein the number of blades of the fan blade is set to be singular.

9. The cooling fan of claim 1, wherein the fan blade assembly further comprises:

10. The cooling fan of claim 9, wherein the fan blade assembly further comprises a drive assembly comprising an electromagnetic coil and a magnet structure that are rotatable with respect to each other upon energization;

the electromagnetic coil is arranged on the shell;

the magnet structure is arranged on the rotating shaft.