Fan structure and heat dissipation module

Abstract

The invention relates to the technical field of electronic product fan dust removal, in particular to a fan structure and a heat dissipation module. The fan main body comprises a plurality of fan blades, and the fan blades are elastic; the vibration generator is used for generating vibration waves with set frequency, so that the fan blades and the vibration waves generate resonance to swing. According to the fan structure and the heat dissipation module provided by the invention, during dust removal operation, the vibration generator generates the vibration waves with the set frequency, the vibration waves can resonate with the fan blades, the resonant fan blades swing by a certain amplitude, then dust on the fan blades falls off, and the falling dust is blown out of the fan main body along the flow channel of the fan main body; therefore, the purpose of dust removal is achieved. According to the technical scheme, dust can be effectively removed, and the heat dissipation performance of the fan body is ensured; and moreover, the dust removal efficiency is better, dust removal is more thorough, the occupied space of the dust removal scheme is small, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal for fans of electronic products, and particularly to a fan structure, an electronic product, and a heat dissipation module. Background Art

[0002] Notebook computers have good portability, and thus are widely used in various industries. During the use of a notebook computer, certain heat will be generated, and a fan is required for heat dissipation. When the fan operates, it continuously conducts the heat inside the notebook computer to the outside to achieve the purpose of heat dissipation.

[0003] If a notebook computer runs for a long time or is affected by the working environment, the fan inside it will accumulate dust. If the dust removal treatment is not carried out for a long time, a large amount of dust will accumulate, seriously affecting the heat dissipation performance of the notebook computer.

[0004] In the prior art, the dust removal treatment for the fan includes various forms. For example, disassembling for dust removal, disassembling the fan for cleaning and replacement. This method is time-consuming and laborious, and there is a risk of damaging the product. Or, using auxiliary tools, such as dust removal glue, etc. This method has low working efficiency and incomplete dust removal. Or, adopting electrostatic dust removal and other methods, without disassembling the fan. However, there are situations such as high cost, great influence by the environment, and complex maintenance and repair. Summary of the Invention

[0005] To solve at least the above technical problems existing in the prior art, the present invention provides a fan structure and a heat dissipation module.

[0006] On the one hand, the present invention provides a fan structure, including a fan main body and a vibration generator; the fan main body includes a plurality of fan blades, and the fan blades are elastic; the vibration generator is used to emit vibration waves with a set frequency, so that the fan blades resonate with the vibration waves and swing.

[0007] In some embodiments, the vibration generator includes a speaker; the speaker is used to emit a sound with a set frequency, so that the fan blades resonate and swing.

[0008] In some embodiments, the speaker includes a first sound emission mode and a second sound emission mode; in the first sound emission mode, the speaker is used for the audio output of the electronic product; in the second sound emission mode, the speaker is used to emit a sound with a set frequency.

[0009] In some embodiments, the plurality of fan blades are divergently arranged with the center of the fan main body as the center of a circle; a set included angle is provided between the plane where the fan blades are located and the plane where the fan main body is located.

[0010] In some embodiments, the angle range between the plane where the fan blade is located and the plane where the fan body is located is from 45 degrees to 135 degrees.

[0011] In some embodiments, the material of the fan blade is a metal material; or the material of the fan blade is a stainless steel material.

[0012] In some embodiments, the length range of the fan blade is from 30 millimeters to 50 millimeters, the width range is from 5 millimeters to 7 millimeters, and the thickness range is from 0.1 millimeter to 0.3 millimeter.

[0013] In some embodiments, the amplitude range when the fan blade resonates with the vibration wave is less than 1 millimeter.

[0014] In some embodiments, the frequency range of the set frequency is from 160 hertz to 250 hertz.

[0015] On the other hand, the present invention also provides a heat dissipation module, including the above-mentioned fan structure.

[0016] For a fan structure and a heat dissipation module provided by the present invention, during the dust removal operation, the vibration generator emits a vibration wave with a set frequency, which can resonate with the fan blade. The resonating fan blade generates a certain amplitude of swing, and then the dust on the fan blade drops off. The dropped dust is blown out of the fan body along the flow channel of the fan body, so as to achieve the purpose of dust removal. The technical solution of the present invention can not only perform effective dust removal to ensure the heat dissipation performance of the fan body; moreover, the dust removal efficiency is better, the dust removal is more thorough, and the space occupied by the dust removal solution is small and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the drawings, several embodiments of the present invention are shown in an exemplary rather than restrictive manner, wherein:

[0018] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0019] Figure 1 It is a schematic structural diagram of the fan structure provided by the embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the fan body in the fan structure provided by the embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the heat dissipation module provided by the embodiment of the present invention.

[0022] In the figure:

[0023] 10: Fan main body; 20: Vibration generator; 30: Heat pipe;

[0024] 11: Fan blade; 12: Hub;

[0025] 21: Speaker. Detailed implementation manners

[0026] To make the objectives, 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0027] An embodiment of the present invention provides a fan structure, including a fan main body and a vibration generator. After the fan main body is started, a heat dissipation air flow is generated for heat dissipation use. When not in heat dissipation operation, the fan main body is in a static state. The vibration generator is used to emit vibration waves with a set frequency to cause the fan blades to resonate. After the fan blades resonate, the dust on them is shaken off, so as to achieve the purpose of dust removal.

[0028] The following will describe in detail the structures of the fan structure provided in the embodiments of the invention, the positional relationship and connection relationship between the structures.

[0029] As Figure 1 and Figure 2 shown, in an embodiment of the present invention, the fan main body includes a plurality of fan blades 11. The fan blades 11 are elastic. The fan main body 10 can be an existing fan structure as long as the fan blades 11 have elasticity. The fact that the fan blades 11 have elasticity can be understood as: under the vibration waves with a set frequency, the fan blades 11 can resonate with the vibration waves. If the original fan blades 11 do not have elasticity (cannot vibrate), the material of the fan blades 11 can be replaced. For example, the fan blades 11 can be replaced with an elastic metal material, such as stainless steel. For example, the stainless steel material is SUS304 stainless steel, so that the fan blades 11 meet the resonance requirements; or, for example, the structure of the fan blades 11 can be improved so that the fan blades 11 can resonate with the set frequency while forming a heat dissipation air flow.

[0030] For example, in an embodiment of the present invention, a plurality of fan blades 11 are divergently arranged with the center of the fan main body 10 as the center of the circle; the center of the fan blades 11 is the hub 12. The hub 12 is cylindrical, and a plurality of divergently arranged fan blades 11 are provided on the outer wall of the hub 12. For example, the hub 12 is injection molded.

[0031] For example, there is a set angle between the plane where the fan blade 11 is located and the plane where the fan main body 10 is located. The ends of two adjacent fan blades 11 are spaced apart. Among the multiple fan blades 11, the intervals at the ends of the fan blades 11 are the same. In the case of resonance, the tips of the fan blades 11 vibrate, and then the entire fan blade 11 vibrates with a certain amplitude. Under the action of vibration, the dust on the fan blade 11 falls off.

[0032] For example, in the embodiment of the present invention, the angle range between the plane where the fan blade 11 is located and the plane where the fan main body 10 is located is 45 degrees to 135 degrees; the plane where the fan blade 11 is located is defined as the X direction and the Y direction, and the direction perpendicular to the plane where the fan blade 11 is located is defined as the Z direction. When the fan blade 11 vibrates, the fan blade 11 will vibrate reciprocally in the X direction and the Y direction, that is, the fan blade 11 vibrates along the plane where the fan blade 11 is located. This vibration space range is the space inherent to the fan main body 10, that is, when the fan main body 10 generates resonance, no additional space is required.

[0033] For example, the angle between the plane where the fan blade 11 is located and the plane where the fan main body 10 is located can be 45 degrees or 135 degrees, or any angle between 45 degrees and 135 degrees. For example, the plane where the fan blade 11 is located is perpendicular to the plane where the fan main body 10 is located, that is, the angle between the plane where the fan blade 11 is located and the plane where the fan main body 10 is located is 90 degrees. When the fan blade 11 is in a vertical state, it is more conducive to vibration in the X direction and the Y direction, avoiding / reducing movement in the Z direction, and no additional space occupied by the fan main body 10 needs to be increased.

[0034] For example, the amplitude range when the fan blade 11 resonates with the vibration wave is less than 1 mm.

[0035] Continue to refer to Figure 1 and Figure 2 As shown, in the embodiment of the present invention, the fan structure is configured with a vibration generator 20. The vibration generator 20 is used to emit a vibration wave with a set frequency, so that the fan blade 11 resonates with the vibration wave and swings.

[0036] The vibration wave with the set frequency can be understood as: the frequency of the vibration wave is the same as or close to the frequency of the fan blade 11. After the vibration generator 20 emits this vibration wave, the fan blade 11 can achieve resonance. It can be seen from this that whether resonance occurs depends on whether the frequencies of the two objects are the same, and does not depend on the distance between the vibration generator 20 and the fan main body 10. Therefore, the position of the vibration generator 20 can be selected according to the space requirements of the application environment.

[0037] For example, the vibration generator 20 includes a buzzer or a speaker 21, etc.

[0038] Regarding the vibration generator 20, it can be a separately provided structure or utilize an existing structure in the surrounding environment. Among them, when the vibration generator 20 is separately provided, the frequency control of the vibration generator 20 is more accurate, which can ensure the effect of resonance dust removal. While utilizing an existing structure in the surrounding environment can save the space for the vibration generator 20, that is, there is no need to design and install the space for the vibration generator 20 anymore, so that the fan main body 10 no longer occupies extra space.

[0039] In the embodiments of the present invention, in the environment where the fan structure is located, generally includes a speaker 21 structure, and sound is emitted through the speaker 21. For example, in a laptop computer, a speaker 21 with an "external speaker" function is required to output audio through the speaker 21.

[0040] The sound emission mode of the speaker 21 can be set to meet the functions of audio output and emitting a sound with a set frequency. That is, the speaker 21 includes a first sound emission mode and a second sound emission mode; in the first sound emission mode, the speaker 21 is used for audio output of electronic products; in the second sound emission mode, the speaker 21 is used for emitting a sound with a set frequency.

[0041] When the electronic product is operating normally, the function of the speaker 21 is audio output. When audio is output, the speaker 21 will output sound waves with a certain frequency, and the frequency of these sound waves will not cause the fan blades 11 to resonate. When dust removal operation is required, the electronic product enters the dust removal mode. For example, when the electronic product is operating at low power consumption, the heat generated is relatively low, and there is no need to perform heat dissipation operation through the fan main body 10. The fan blades 11 remain stationary, and the controller controls the speaker 21 to emit a sound with a set frequency, causing the stationary fan blades 11 to resonate, making the fan blades 11 vibrate within a certain amplitude to shake off the dust on them.

[0042] In the embodiments of the present invention, for the activation of the dust removal mode, a manual activation mode or an automatic activation mode can be adopted. In the manual activation mode, a reservation time method can be used. For example, after the electronic product enters the low power consumption mode and after a set time, such as 5 minutes later, the dust removal mode can be activated; in the automatic activation mode, dust removal operations are performed at fixed dates and fixed time periods. For example, dust removal operations are started once a day or every few days. The dust removal time period can be selected according to the operating state of the electronic product. That is, after reaching the dust removal cycle, when the electronic product enters the low power consumption mode, the dust removal mode can be automatically activated.

[0043] In the electronic product, the speaker 21 is an existing structure and its position does not need to be changed, that is, the current position of the speaker 21 does not need to be changed; or, the position of the speaker 21 can also be appropriately changed according to the position of the fan main body 10. For example, when the heat dissipation module of the electronic product includes multiple fan main bodies 10, the positions of multiple speakers 21 are appropriately changed to achieve a spatial layout form of one fan main body 10 plus one speaker.

[0044] In an embodiment of the present invention, in the second sound - emitting mode, the speaker 21 is used to emit a sound with a set frequency, and the frequency range of the set frequency is from 160 Hz to 250 Hz; for example, the set frequency emitted by the speaker 21 can be 160 Hz or 250 Hz, or any value between 160 Hz and 250 Hz. Among them, the frequency range of the set frequency is set according to the natural frequency of the fan blade 11, and the calculation method of the natural frequency of the fan blade 11 is as follows:

[0045] The fan blade 11 of the fan main body 10 can be simplified or equivalent to a cantilever beam structure, and the resonance frequency of the cantilever beam structure can be calculated by the following formula:

[0046]

[0047] Among them, in the formula, f is the resonance frequency, k is the equivalent stiffness of the fan blade 11, and m is the equivalent mass of the fan blade 11. For the cantilever beam structure, that is, the equivalent stiffness k of the fan blade 11 can be calculated by the following formula:

[0048]

[0049] Among them, E is the elastic modulus of the material of the fan blade 11, I is the moment of inertia of the cross - section of the fan blade 11, and for a rectangular cross - section where b is the cross - section width, h is the cross - section height, and L is the length of the cantilever beam structure, that is, the length of the fan blade 11.

[0050] For the cantilever beam structure, that is, the equivalent mass m of the fan blade 11, it can be obtained by integrating the volume of the fan blade 11 and multiplying by the material density.

[0051] In an embodiment of the present invention, the length range of the fan blade 11 is from 30 mm to 50 mm, the width range is from 5 mm to 7 mm, and the thickness range is from 0.1 mm to 0.3 mm; for example, the length of the fan blade 11 can be 30 mm or 50 mm, or any length between 30 mm and 50 mm; for example, the width of the fan blade 11 can be 5 mm or 7 mm, or any width between 5 mm and 7 mm; for example, the thickness of the fan blade 11 can be 0.1 mm or 0.3 mm, or any thickness between 0.1 mm and 0.3 mm; for example, the length of the fan blade 11 is 36.8 mm, the width range is 5.5 mm, the thickness range is 0.1 mm, the equivalent length of the fan blade 11 is 20 mm, and the material of the metal fan blade 11 is SUS304 stainless steel.

[0052] According to the above formula, the resonance frequency of the fan blade 11 is about 300 Hz. The actual resonance frequency will be affected by various factors. Therefore, a more accurate resonance frequency can be obtained through resonance frequency simulation calculation.

[0053] Among them, the speaker 21 performs simple harmonic vibration within a certain frequency range. The speaker 21 serves as the excitation source of the fan blade 11. When the excitation frequency is the same as the natural frequency of the fan blade 11, resonance will occur, thereby achieving the effect of shaking off the dust on the fan blade 11.

[0054] For the simulation calculation of the resonance frequency, after steps such as establishing a solid mechanics analysis module, importing and simplifying the geometric model, defining material properties, applying constraints, dividing the mesh, setting the number of characteristic frequencies and solving, and drawing the vibration mode or displacement deformation diagram, the natural frequency and vibration mode diagram of the fan can be obtained.

[0055] The resonance frequency obtained through simulation is 209 Hz. Within this resonance frequency range, the fan blade 11 can be effectively shaken, achieving the purpose of dust removal. In the embodiment of the present invention, the amplitude of the fan blade 11 is between 0 and 1 mm, that is, the amplitude of the fan blade 11 is less than 1 mm.

[0056] As Figure 3 shown, the embodiment of the present invention also provides a heat dissipation module, including the above-mentioned fan structure. Taking an electronic product as a laptop computer as an example, the laptop computer dissipates heat from the chip through the heat dissipation module. The heat dissipation module includes a fan body 10, a heat pipe 30, and a vibration generator 20. The heat pipe 30 is in contact with a heat source (such as a chip) and transfers the heat to the fan body 10, and the fan body 10 is used to dissipate the heat outside the laptop computer. During the long-term operation of the fan body 10 or affected by the use environment, dust will accumulate on the fan blade 11 of the fan body 10.

[0057] When dust removal treatment is required, the fan body 10 stops running, the fan blade 11 remains in a static state, and the vibration generator 20 (for example, the speaker 21) emits a sound with a set frequency. For example, the set frequency is 209 Hz, and the sound causes the fan blade 11 to resonate. After the fan blade 11 swings within a certain range, the dust on the fan blade 11 can be shaken off. After the fan body 10 runs again, the shaken-off dust is blown outside the fan body 10, thereby achieving the function of dust removal for the fan body 10.

[0058] For a fan structure and a heat dissipation module provided by the present invention, during the dust removal operation, the vibration generator 20 emits a vibration wave with a set frequency. This vibration wave can resonate with the fan blade 11, causing the resonant fan blade 11 to swing with a certain amplitude, and then the dust on the fan blade 11 drops off. The dropped dust is blown outside the fan body 10 along the flow channel of the fan body 10, thereby achieving the purpose of dust removal. The technical solution of the present invention can not only effectively remove dust and ensure the heat dissipation performance of the fan body 10; moreover, the dust removal efficiency is better, the dust removal is more thorough, and the space occupied by the dust removal solution is small and the cost is low.

[0059] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0061] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A fan structure, characterized in that, It includes a fan main body (10) and a vibration generator (20); The fan main body (10) includes a plurality of fan blades (11), and the fan blades (11) are elastic; The vibration generator (20) is used to emit vibration waves with a set frequency, so that the fan blades (11) resonate with the vibration waves and swing.

2. The fan structure according to claim 1, characterized in that, The vibration generator (20) includes a speaker (21); The speaker (21) is used to emit sound with a set frequency, so that the fan blades (11) resonate and swing.

3. The fan structure according to claim 2, wherein The speaker (21) includes a first sound emission mode and a second sound emission mode; In the first sound emission mode, the speaker (21) is used for audio output of electronic products; In the second sound emission mode, the speaker (21) is used to emit sound with a set frequency.

4. The fan structure according to claim 1, wherein, The plurality of fan blades (11) are arranged in a divergent manner with the center of the fan main body (10) as the center of the circle; There is a set included angle between the plane where the fan blade (11) is located and the plane where the fan main body (10) is located.

5. The fan structure according to claim 4, characterized in that, The angle range between the plane where the fan blade (11) is located and the plane where the fan main body (10) is located is 45 degrees to 135 degrees.

6. The fan structure according to claim 1, wherein The material of the fan blade (11) is a metal material; or The material of the fan blade (11) is a stainless steel material.

7. The fan structure according to claim 1, characterized in that, The length range of the fan blade (11) is 30 mm to 50 mm, the width range is 5 mm to 7 mm, and the thickness range is 0.1 mm to 0.3 mm.

8. The fan structure according to claim 1, characterized in that, The amplitude range when the fan blade (11) resonates with the vibration wave is less than 1 mm.

9. The fan structure according to claim 1, wherein The frequency range of the set frequency is 160 Hz to 250 Hz.

10. A heat dissipation module, characterized in that, It includes the fan structure according to any one of claims 1 to 9.

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