CN112682335A - Heat radiation fan and electronic equipment - Google Patents
Heat radiation fan and electronic equipment Download PDFInfo
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- CN112682335A CN112682335A CN202011554785.9A CN202011554785A CN112682335A CN 112682335 A CN112682335 A CN 112682335A CN 202011554785 A CN202011554785 A CN 202011554785A CN 112682335 A CN112682335 A CN 112682335A
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- fan
- magnetic
- magnetic component
- fan blade
- upper cover
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- 230000005855 radiation Effects 0.000 title description 2
- 230000017525 heat dissipation Effects 0.000 claims abstract description 20
- 238000001746 injection moulding Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 2
- 238000000429 assembly Methods 0.000 claims 2
- 238000001816 cooling Methods 0.000 abstract description 7
- 239000000243 solution Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to the technical field of heat dissipation equipment, and particularly discloses a heat dissipation fan and electronic equipment, wherein the heat dissipation fan comprises: a first magnetic component; a fan blade; the second magnetic component is fixedly connected with the fan blade; the second magnetic component is arranged opposite to the first magnetic component, and is magnetically acted by the first magnetic component to uniformly apply external force to the fan blade around the axis of the fan blade. The invention provides a cooling fan and an electronic device, which can effectively improve the stability of fan blades during operation, reduce the amplitude of vertical deflection and realize noise reduction.
Description
Technical Field
The present invention relates to the field of heat dissipation devices, and in particular, to a heat dissipation fan and an electronic device.
Background
Generally, notebook computers use a centrifugal fan as a main heat dissipation component. Referring to fig. 1, the conventional dc centrifugal fan includes a bearing 1, fan blades 2, and a rotating shaft 3. Wherein, the bearing 1 is fixed on the base of the notebook computer, and the U-shaped opening is upward; the shaft center 201 of the fan blade 2 is inserted into the U-shaped opening; the upper end of the rotating shaft 3 is connected with the shaft center 201, and the lower end is connected with the bearing 1, so that the rotating connection between the fan blades 2 and the bearing 1 is realized. The structure is characterized in that:
the higher the bearing 1 and the shaft center 201 (the thicker the thickness of the direct-current centrifugal fan is), the deeper the shaft center 201 is inserted into the U-shaped opening, the more reliable the bearing 1 supports the fan blade 2, the more stable the fan blade 2 rotates, and the smaller the amplitude of the vertical deflection of the fan is;
secondly, the larger the diameter of the fan blade 2 is, the larger the amplitude of the vertical deflection is, and the more obvious the edge position is.
In recent years, the demand of the market for thinning notebook computers is higher and higher, the space of the direct current centrifugal fan in the Z-axis direction is limited, and in order to meet the heat dissipation demand (ensure larger air volume), the direct current centrifugal fan can only be developed transversely, so that structural design schemes of being thin and large (small in thickness and large in diameter) are mostly adopted.
The structural scheme of 'thin and big' not only reduces the depth of the shaft center 201 inserted into the U-shaped opening, but also increases the diameter of the fan blade 2, so the amplitude of the up-down deflection is larger, the running stability is deficient, even the resonance of other parts can be caused, and the noise is obvious.
Disclosure of Invention
An object of the present invention is to provide a cooling fan and an electronic device, which can effectively improve the stability of the fan blades during operation, reduce the amplitude of vertical deflection, and reduce noise.
To achieve the above object, in one aspect, the present invention provides a heat dissipation fan, including:
a first magnetic component;
a fan blade;
the second magnetic component is fixedly connected with the fan blade; the second magnetic component is arranged opposite to the first magnetic component, and is magnetically acted by the first magnetic component to uniformly apply external force to the fan blade around the axis of the fan blade.
Optionally, the second magnetic component is coaxial with the fan blade.
Optionally, the second magnetic assembly is an annular magnetic sheet.
Optionally, the second magnetic component is located at the edge of the fan blade; the second magnetic component is bonded with the fan blade, and the second magnetic component and the fan blade are of an in-mold injection molding structure.
Optionally, the first magnetic assembly is another annular magnetic sheet with the same shape and size as the second magnetic assembly; and is
The first magnetic component is coaxial with the second magnetic component.
Optionally, the polarities of the magnetic poles of the first magnetic assembly and the second magnetic assembly are the same.
Optionally, the method further includes:
the first magnetic component is fixedly connected with the upper cover;
the bottom box is positioned below the upper cover and encloses with the upper cover to form an accommodating space for accommodating the fan blades.
Optionally, the magnetic poles of the first magnetic assembly and the second magnetic assembly are opposite in polarity.
Optionally, the method further includes:
an upper cover;
the bottom box is positioned below the upper cover and encloses with the upper cover to form an accommodating space for accommodating the fan blades; the first magnetic component is fixedly connected with the bottom box.
In another aspect, an electronic device is provided, which includes the above heat dissipation fan.
The invention has the beneficial effects that: the second magnetic component is fixedly arranged above the first magnetic component, and the second magnetic component applies uniform external force to the fan blades around the axes of the fan blades under the magnetic action of the first magnetic component, so that the stress difference of the fan blades at each position is reduced, stable operation of the fan blades is facilitated, resonance is reduced, and the noise reduction effect can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural view of a dc centrifugal fan provided in the background art;
fig. 2 is an assembly view of a heat dissipation fan according to an embodiment;
fig. 3 is an exploded view of a heat dissipation fan according to an embodiment;
fig. 4 is a schematic cross-sectional view illustrating a heat dissipation fan according to an embodiment;
fig. 5 is a schematic cross-sectional view of the cooling fan according to the second embodiment.
In the figure:
1. a bearing;
2. a fan blade; 201. an axis;
3. a rotating shaft;
4. an upper cover;
5. a bottom case;
6. a first magnetic component;
7. a second magnetic assembly.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
The embodiment provides an electronic device, which comprises a heat dissipation fan.
It should be noted that the electronic device in this embodiment may be a notebook computer, a desktop computer, an all-in-one computer, a tablet computer, or an audio device.
Referring to fig. 2 to 4, in the present embodiment, the heat dissipation fan includes an upper cover 4, a bottom case 5, a first magnetic component 6, a fan blade 2, and a second magnetic component 7.
The bottom of the fan blade 2 is provided with a shaft center 201 for connecting with the rotating shaft 3, and the shaft center 201 is overlapped with the axis of the fan blade 2, so that the fan blade 2 rotates around the shaft center 201 under the driving of the rotating shaft 3. The bottom box 5 is located below the upper cover 4 and encloses with the upper cover 4 to form an accommodating space for accommodating the fan blades 2. The first magnetic component 6 is fixedly connected with the upper cover 4, and the second magnetic component 7 is fixedly connected with the fan blade 2. The second magnetic component 7 is arranged opposite to the first magnetic component 6, and is magnetically acted by the first magnetic component 6 to uniformly apply downward external force to the fan blade 2 around the axis of the fan blade 2.
It can be understood that the large vertical deflection of the fan blade 2 occurs when the fan blade 2 rotates, mainly because the supporting force on the axis is not enough and the stress on the fan blade 2 is not uniform. In this embodiment, the first magnetic component 6 is fixed in the upper cover 4, the second magnetic component 7 is fixed on the fan blade 2, when the polarities of the two magnetic poles are the same (both are S or both are N), the second magnetic component 7 receives vertical downward magnetic force, the magnetic force is transmitted to the fan blade 2, so that the fan blade 2 is subjected to uniform vertical downward external force, the vertical downward external force presses the fan blade 2 downward while the fan blade 2 rotates, the force deviation degree of each part is reduced, the stability of the fan blade 2 during rotation can be effectively improved, and the amplitude of vertical deflection is reduced. For example, before the first magnetic component 6 and the second magnetic component 7 are additionally arranged, the stress at the A position of the fan blade 2 is 1N, the stress at the B position of the fan blade is 2N, the stress ratio is 1:2, the deviation is large, and the vertical deflection is serious; after the first magnetic assembly 6 and the second magnetic assembly 7 are additionally arranged, the stress of each part is uniformly increased by 10N due to the second magnetic assembly 7, the stress ratio of the part A to the part B is changed to 11:12, the deviation is reduced, and the vertical deflection amplitude is reduced. Therefore, even if the fan blade 2 has deflection and unbalance, the fan blade 2 can run more stably by adding the first magnetic component 6 and the second magnetic component 7.
As an alternative implementation of "applying an external force uniformly to the fan blade 2 around the axis of the fan blade 2", the fan blade 2 is parallel-opposed to the first magnetic member 6, the first magnetic member 6 has an area not smaller than that of the second magnetic member 7, and the second magnetic member 7 is coaxial with the fan blade 2. For example, the first magnetic component 6, the second magnetic component 7 and the fan blade 2 are coaxial, and the first magnetic component 6 and the second magnetic component 7 are ring-shaped magnetic pieces with the same shape and size.
Of course, the first magnetic component 6 can also be a rectangular magnetic plate, and the second magnetic component 7 can be an annular magnetic sheet coaxial with the fan blade 2.
In some other embodiments, the first magnetic element 6 is a ring-shaped magnetic sheet or a rectangular magnetic plate: the second magnetic components 7 are a plurality of fan-shaped magnetic sheets which are arranged around the axis of the fan blade 2 at equal intervals; or the second magnetic components 7 are a plurality of arc-shaped magnetic sheets which are arranged around the axis of the fan blade 2 at equal intervals; or the second magnetic components 7 are a plurality of circular magnetic sheets arranged around the axis of the fan blade 2 at equal intervals; or, the second magnetic components 7 are a plurality of rectangular magnetic sheets arranged around the axis of the fan blade 2 at equal intervals, and the like. The specific shape of the magnetic sheet can be various, and as long as the magnetic sheets at each position on the fan blade 2 are consistent in shape and are arranged at equal intervals around the axis of the fan blade 2, all positions of the fan blade 2 can be uniformly stressed, so that the specific shape of the magnetic sheet is not limited in the embodiment.
Further, the second magnetic component 7 is located at the edge of the fan blade 2. It can be understood that the closer the second magnetic component 7 is to the edge of the fan blade 2, the more the advantage of the radius dimension (equivalent to the length of the moment arm) of the fan blade 2 can be fully utilized, and the moment applied to all positions of the fan blade 2 is increased, so that the fan blade 2 rotates more stably.
Optionally, the second magnetic component 7 is fixed to the top of the fan blade 2 by a fastener such as glue or a bolt. Or, the second magnetic component 7 is fixedly connected with the fan blade 2 in an in-mold injection molding mode.
The cooling fan provided by the embodiment has the following advantages:
firstly, the outer edge of the fan blade 2 is added with a restraining external force, so that the operation is more stable, the swinging interference and the noise generation are avoided, and the service life is prolonged;
the running noise of the cooling fan under the same specification is reduced, the resonance phenomenon is avoided, and the use experience of a client is improved;
and thirdly, under the same noise condition, the height design value of the fan blade 2 is increased, the work area is increased, and the heat dissipation performance is improved.
Example two
Referring to fig. 5, the present embodiment provides a heat dissipation fan, which can be used in the electronic device in the first embodiment instead of the heat dissipation fan in the first embodiment.
The difference between the cooling fan provided in this embodiment and the cooling fan provided in the first embodiment is as follows:
the first magnetic assembly 6 in this embodiment is fixed to the bottom case 5, and the polarity of the magnetic pole is opposite to that of the second magnetic assembly 7. For example, the first magnetic element 6 is S, the second magnetic element 7 is N; alternatively, the first magnetic member 6 is N and the second magnetic member 7 is S.
The first magnetic element 6 and the second magnetic element 7 attract each other, and the fan blade 2 can be subjected to downward external force.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A heat dissipating fan, comprising:
a first magnetic component;
a fan blade;
the second magnetic component is fixedly connected with the fan blade; the second magnetic component is arranged opposite to the first magnetic component, and is magnetically acted by the first magnetic component to uniformly apply external force to the fan blade around the axis of the fan blade.
2. The heat dissipation fan of claim 1, wherein the second magnetic component is coaxial with the fan blade.
3. The heat dissipating fan as claimed in claim 2, wherein the second magnetic member is a ring-shaped magnetic sheet.
4. The heat dissipation fan of claim 3, wherein the second magnetic component is located at an edge of the fan blade; the second magnetic component is bonded with the fan blade, and the second magnetic component and the fan blade are of an in-mold injection molding structure.
5. The heat dissipating fan as claimed in claim 3, wherein the first magnetic member is another ring-shaped magnetic sheet having the same shape and size as the second magnetic member; and is
The first magnetic component is coaxial with the second magnetic component.
6. The heat dissipation fan of claim 1, wherein the polarities of the poles of the first and second magnetic assemblies are the same.
7. The heat dissipating fan as claimed in claim 6, further comprising:
the first magnetic component is fixedly connected with the upper cover;
the bottom box is positioned below the upper cover and encloses with the upper cover to form an accommodating space for accommodating the fan blades.
8. The heat dissipating fan of claim 1 wherein the first and second magnetic assemblies have opposite magnetic poles.
9. The heat dissipating fan as claimed in claim 8, further comprising:
an upper cover;
the bottom box is positioned below the upper cover and encloses with the upper cover to form an accommodating space for accommodating the fan blades; the first magnetic component is fixedly connected with the bottom box.
10. An electronic device comprising the heat dissipating fan according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011554785.9A CN112682335A (en) | 2020-12-24 | 2020-12-24 | Heat radiation fan and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011554785.9A CN112682335A (en) | 2020-12-24 | 2020-12-24 | Heat radiation fan and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112682335A true CN112682335A (en) | 2021-04-20 |
Family
ID=75452999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011554785.9A Pending CN112682335A (en) | 2020-12-24 | 2020-12-24 | Heat radiation fan and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112682335A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030000004A (en) * | 2001-06-22 | 2003-01-03 | 현대자동차주식회사 | Keep balance apparatus of cooling fan |
| TW200625766A (en) * | 2005-01-13 | 2006-07-16 | Sunonwealth Electr Mach Ind Co | Rotor balance structure for motor |
| US20070196221A1 (en) * | 2006-02-21 | 2007-08-23 | Sunonwealth Electric Machine Industry Co., Ltd. | Miniature blower fan |
| CN201219229Y (en) * | 2008-07-11 | 2009-04-08 | 元山科技工业股份有限公司 | Single stator external pole type heat radiation fan |
| US20110097221A1 (en) * | 2009-10-23 | 2011-04-28 | Alex Horng | Motor and Heating Dissipating Fan Including Motor |
| US20120301277A1 (en) * | 2011-05-26 | 2012-11-29 | Chih-Hsiang Chang | Fan |
-
2020
- 2020-12-24 CN CN202011554785.9A patent/CN112682335A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030000004A (en) * | 2001-06-22 | 2003-01-03 | 현대자동차주식회사 | Keep balance apparatus of cooling fan |
| TW200625766A (en) * | 2005-01-13 | 2006-07-16 | Sunonwealth Electr Mach Ind Co | Rotor balance structure for motor |
| US20070196221A1 (en) * | 2006-02-21 | 2007-08-23 | Sunonwealth Electric Machine Industry Co., Ltd. | Miniature blower fan |
| CN201219229Y (en) * | 2008-07-11 | 2009-04-08 | 元山科技工业股份有限公司 | Single stator external pole type heat radiation fan |
| US20110097221A1 (en) * | 2009-10-23 | 2011-04-28 | Alex Horng | Motor and Heating Dissipating Fan Including Motor |
| US20120301277A1 (en) * | 2011-05-26 | 2012-11-29 | Chih-Hsiang Chang | Fan |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210420 |
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| RJ01 | Rejection of invention patent application after publication |