Fan blade structure, fan module and electronic product

Abstract

The invention relates to the technical field of cooling fans, in particular to a fan blade structure, a fan module and an electronic product. The fan blade structure comprises a hub, fan blades and a mute ring; the circumferential surface of the hub is connected with the first ends of the fan blades; the second end of each fan blade comprises a bevel edge, and the linear distance between the top blade tip of each bevel edge and the hub axis is larger than that between the bottom blade tip of each bevel edge and the hub axis. The mute ring is connected with the bevel edge. According to the fan blade structure, the fan blade adopts the bevel edge structural form, and compared with an existing vertical edge structural form, the interval between the fan blade and the side structure where the fan blade is located is larger, so that in the operation process of the fan blade structure, the pressure of the fan blade with the bevel edge is smaller, and the noise of the fan blade with the bevel edge is smaller at the same rotating speed or at the same noise value; the rotating speed of the fan blades with the bevel edges is higher; therefore, although a small part of fan blades are cut off from the fan blades with the bevel edges, and the wind sweeping area of the fan blades is reduced to a small extent, the noise improvement gain brought by the fan blades is larger.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation fans, and in particular to a fan blade structure, a fan module and an electronic product. Background Art

[0002] As the performance of laptop computers continues to improve, the requirements for system heat dissipation capabilities are also getting higher and higher. For the air-cooling solution commonly used in laptops, the performance of the fan plays a vital role in the heat dissipation capability.

[0003] When the cooling system of a laptop computer requires more fan flow, the fan speed can be increased, but the noise generated by the fan will also increase accordingly. That is, although the existing fan structure can meet the cooling requirements of the system by increasing the speed, it will also bring new noise problems. Summary of the invention

[0004] In order to solve at least the above technical problems existing in the prior art, the present invention provides a fan blade structure, a fan module and an electronic product.

[0005] On the one hand, the present invention provides a fan blade structure, including a hub, fan blades and a silent ring; the circumferential surface of the hub is connected to the first ends of multiple fan blades; the second end of the fan blade includes a hypotenuse, and the straight-line distance between the top blade tip of the hypotenuse and the axis of the hub is greater than the straight-line distance between the bottom blade tip and the axis of the hub; the silent ring is connected to the hypotenuse.

[0006] In some embodiments, the inclined angles of the hypotenuses of the plurality of fan blades are the same; and the contour shape of the fan blade structure is a truncated cone.

[0007] In some embodiments, a plurality of the silent rings are included, and the plurality of the silent rings are connected to the hypotenuse.

[0008] In some embodiments, the silent ring includes a first silent ring and a second silent ring; the first silent ring is connected to the top blade tip of the hypotenuse, and the second silent ring is connected to the bottom blade tip of the hypotenuse.

[0009] In some embodiments, the top surface of the first silent ring is flush with the top end of the fan blade; and the bottom surface of the second silent ring is flush with the bottom end of the fan blade.

[0010] In some embodiments, a vertical projection of the first silent ring in the direction of the second silent ring is arranged to be non-overlapping with the second silent ring.

[0011] In some embodiments, the inclination angle of the hypotenuse is 60 degrees to 80 degrees.

[0012] Another aspect of the present invention provides a fan module, comprising the above-mentioned fan blade structure.

[0013] In yet another aspect, the present invention provides an electronic product, comprising the above-mentioned fan blade structure or the above-mentioned fan module.

[0014] The present invention provides a fan blade structure, a fan module and an electronic product, in which a bevel is provided at the second end of the fan blade, and a gap is provided between the end where the bevel is located and the fan blade mounting structure. Compared with the existing vertical edge structure, the bevel structure has a larger gap with the side structure. Therefore, during the operation of the fan blade structure, the fan blade with the bevel has a smaller pressure at this location, and at the same rotation speed, the fan blade with the bevel has a smaller noise, or at the same noise value, the fan blade with the bevel has a higher rotation speed. Although the fan blade with the bevel cuts off a small part of the fan blade and slightly reduces the wind sweeping area of ​​the fan blade, the noise improvement gain it can bring is greater. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0016] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0017] Figure 1 A schematic diagram of the structure of a fan blade provided in an embodiment of the present invention;

[0018] Figure 2 A front view of a fan blade structure provided by an embodiment of the present invention;

[0019] Figure 3 A top view of a fan blade structure provided by an embodiment of the present invention;

[0020] Figure 4 A cross-sectional view of a fan blade structure provided by an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the structure of a fan module provided in an embodiment of the present invention.

[0022] In the figure:

[0023] 10: fan blade structure; 20: installation structure;

[0024] 11: wheel hub; 12: fan blades; 13: silent ring;

[0025] 121: bevel;

[0026] 131: first silent ring; 132: second silent ring. DETAILED DESCRIPTION

[0027] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] An embodiment of the present invention provides a fan blade structure, including a hub, a fan blade and a silent ring. The hub is used to connect to a drive structure. A bevel is provided at the end of the fan blade to reduce the pressure at the position of the bevel when the fan blade is running, thereby reducing noise. The silent ring is provided on the fan blade to make the air output of the fan blade uniform and enhance the structural strength of the fan blade.

[0029] The following is a detailed description of various structures of a fan blade structure provided by an embodiment of the present invention, as well as the positional relationship and connection relationship between the various structures, in conjunction with the accompanying drawings.

[0030] like Figures 1 to 4 As shown, the circumferential surface of the hub 11 is connected to the first ends of the multiple fan blades 12, and the multiple fan blades 12 are arranged in a divergent shape with the center of the hub 11 as the center of the circle. The arrangement of the fan blades 12 is the same as the fan blade arrangement of the existing fan structure, wherein the spacing between the second ends of adjacent fan blades 12 in the multiple fan blades 12 is the same.

[0031] In the embodiment of the present invention, the shape of the fan blade 12, such as parameters such as the bending angle, is not limited.

[0032] The second end of the blade 12 includes a bevel 121, and the straight-line distance between the top blade tip of the bevel 121 and the axis of the hub 11 is greater than the straight-line distance between the bottom blade tip and the axis of the hub 11; as shown in the perspective of the figure, the bevel 121 is inclined inward, so that the top diameter of the blade structure 10 formed by the blade 12 is greater than the bottom diameter. Compared with the second end of the existing blade being a vertical structure, the bevel 121 is provided to form an inward space, and the pressure on the second end of the blade 12 is reduced by using the space.

[0033] For example, the inclined angles of the hypotenuses 121 of the plurality of blades 12 are the same; the contour shape of the blade structure 10 is a truncated cone.

[0034] In the above-mentioned fan blade structure 10, since the second end of the fan blade 12 is set as the bevel 121, the area of ​​the fan blade 12 is appropriately reduced. Therefore, when the fan blade structure 10 rotates, its swept area will also decrease accordingly. However, at the same time, due to the reduction in the area of ​​the fan blade 12, the interval between this part and the fan blade 12 mounting structure 20 will increase. Compared with the existing second end which is a vertical edge, the cross-sectional shape of the interval part of the bevel 121 is a right-angled trapezoid (the existing cross-sectional shape is a rectangle). When the interval is increased, during the operation of the fan blade structure 10, the fan blade 12 with the bevel 121 has less pressure at the large interval, which can reduce vibration noise, thereby achieving the purpose of reducing noise.

[0035] It can be seen from this that, compared with the existing fan blades, although the fan blade 12 with the beveled edge 121 cuts off a small part of the fan blade 12 and slightly reduces the wind sweeping area of ​​the fan blade 12, it can bring a greater gain in noise improvement.

[0036] For example, the inclination angle of the bevel 121 is 60 to 80 degrees. The larger the inclination angle, that is, the closer it is to 90 degrees, the smaller the area of ​​the fan blade 12 is reduced. On the contrary, the smaller the inclination angle, the greater the slope of the bevel 121, and the greater the area of ​​the fan blade 12 is reduced. For example, the angles of multiple bevels 121 are the same, all 75 degrees.

[0037] Continue to refer Figures 1 to 4 As shown, in the embodiment of the present invention, the mute ring 13 is connected to the bevel 121. The bevel 121 of the plurality of blades 12 is connected to the mute ring 13, and the performance of the blades 12 can be improved by the mute ring 13, which has the effect of making the air flow of the blades 12 uniform and strengthening the strength of the blade structure 10, thereby achieving the purpose of mute.

[0038] For example, the fan blade structure 10 includes a plurality of silent rings 13, and the plurality of silent rings 13 are respectively connected to the hypotenuse 121. For example, the silent ring 13 includes a first silent ring 131 and a second silent ring 132; the first silent ring 131 is connected to the top blade tip of the hypotenuse 121, and the second silent ring 132 is connected to the bottom blade tip of the hypotenuse 121.

[0039] Of the two silent rings 13, the first silent ring 131 plays the role of compressing the wind to make the wind output of the fan structure more uniform, and the second silent ring 132 plays the role of strengthening the overall structural strength of the fan blades 12. Whether it is adjusting the uniformity of the wind output or increasing the strength of the fan blades 12, the stability of the fan blades 12 when running at high speed can be improved, thereby reducing the probability or decibel of noise generated by the fan blades 12 to achieve a silent effect.

[0040] For example, the top surface of the first silent ring 131 is flush with the top of the blade 12; the bottom surface of the second silent ring 132 is flush with the bottom of the blade 12. For example, the structure of the silent ring 13 is not a continuous annular structure, and two adjacent blades 12 are connected by a connecting block (silent sub-ring), the top surface of the connecting block of the first silent ring 131 is flush with the top of the blade 12, and the bottom surface of the connecting block of the second silent ring 132 is flush with the bottom of the blade 12.

[0041] A plurality of connecting blocks may form a first silent ring 131 or a second silent ring 132 structure. For example, the vertical projection of the first silent ring 131 in the direction of the second silent ring 132 is arranged non-overlappingly with the second silent ring 132, and the two may also have a certain interval along the radial direction of the fan blade structure 10. The first silent ring 131 and the second silent ring 132 are arranged at the top blade tip and the bottom blade tip, respectively, which can effectively improve the uniformity of the air outlet of the fan blade structure 10, thereby having a good silent air outlet effect.

[0042] like Figure 5 As shown, an embodiment of the present invention further provides a fan module, including a mounting structure 20 and the above-mentioned fan blade structure 10, the mounting structure 20 includes an air inlet, and the mounting structure 20 and the fan blade structure 10 form a tongue portion, that is, the air duct aperture of the tongue portion is the smallest, and the airflow is pressurized after passing through this portion, and is gradually released as the fan blade 12 rotates, and is finally discharged at the air outlet perpendicular to the air inlet.

[0043] like Figure 5 In area A, the cross-sectional shape of the air duct at the tongue portion is a right-angled trapezoid. Compared with the traditional fan structure, since the aperture of the air duct is increased, the pressure of the fan blade 12 in the large-aperture air duct is smaller, and the probability of generating vibration noise is smaller.

[0044] An embodiment of the present invention further provides an electronic product, comprising the above-mentioned fan blade structure 10 or the above-mentioned fan module.

[0045] The above fan module or electronic product is simulated and tested. According to the simulation results, when the single blade structure 10 rotates at 5000 revolutions, the blade structure 10 of this embodiment loses 10% of the air volume Q compared to the traditional blade structure, but the noise is improved by 38%. Therefore, it can be seen that the gain of the blade structure 10 of this embodiment on noise is greater than the loss caused by the reduction of the swept area.

[0046] According to the simulation results, the fan blade structure 10 with double silent rings 13 has more uniform airflow, while the traditional fan blade structure with single silent ring has airflow on one side. The double silent rings 13 have more uniform airflow, which is more conducive to the heat dissipation of the electronic product system.

[0047] Simulation comparison results of noise values: at the same noise value, such as 45dba, the fan speed of the fan blade structure 10 of this embodiment is 500 rpm higher than that of the traditional fan blade structure, and at 48dba, the fan speed of the fan blade structure 10 of the embodiment is 600 rpm higher than that of the traditional fan blade structure; at the noise values ​​of 45dBa and 48dBa, the flow rate of the fan blade structure 10 of this embodiment is increased by about 4.3%. At the same speed, such as 4400 rpm, the fan noise of the fan blade structure 10 of this embodiment is 3dBa lower than that of the traditional fan blade structure, and the fan flow rate is lost by about 11%.

[0048] The present invention provides a fan blade structure 10, a fan module and an electronic product, in which a bevel 121 is provided at the second end of the fan blade 12, and a gap is provided between the end where the bevel 121 is located and the fan blade 12 mounting structure 20. Compared with the existing vertical edge structure, the structural form of the bevel 121 has a larger gap with the side structure where it is located. Therefore, during the operation of the fan blade structure 10, the fan blade 12 with the bevel 121 has a smaller pressure at this point, and at the same speed, the fan blade 12 with the bevel 121 has a smaller noise, or at the same noise value, the fan blade 12 with the bevel 121 has a higher speed. Although the fan blade 12 with the bevel 121 cuts off a small part of the fan blade 12 and slightly reduces the swept area of ​​the fan blade 12, the noise improvement gain it can bring is greater.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A fan blade structure, characterized in that: It comprises a hub (11), a fan blade (12) and a silent ring (13); The circumferential surface of the hub (11) is connected to the first ends of the plurality of blades (12); The second end of the fan blade (12) comprises a bevel (121), and the straight-line distance between the top blade tip of the bevel (121) and the axis of the hub (11) is greater than the straight-line distance between the bottom blade tip and the axis of the hub (11); The silent ring (13) is connected to the hypotenuse (121).

2. The fan blade structure according to claim 1, characterized in that: The inclined angles of the beveled edges (121) of the plurality of fan blades (12) are the same; The outline shape of the fan blade structure is a truncated cone.

3. The fan blade structure according to claim 1, characterized in that: It comprises a plurality of the silent rings (13), and the plurality of the silent rings (13) are connected to the hypotenuse (121).

4. The fan blade structure according to claim 3, characterized in that: The silent ring (13) comprises a first silent ring (131) and a second silent ring (132); The first silent ring (131) is connected to the top blade tip of the oblique edge (121), and the second silent ring (132) is connected to the bottom blade tip of the oblique edge (121).

5. The fan blade structure according to claim 4, characterized in that: The top surface of the first silent ring (131) is flush with the top of the fan blade (12); The bottom surface of the second silent ring (132) is flush with the bottom end of the fan blade (12).

6. The fan blade structure according to claim 4, characterized in that: The vertical projection of the first silent ring (131) in the direction of the second silent ring (132) is arranged to be non-overlapping with the second silent ring (132).

7. The fan blade structure according to any one of claims 1 to 6, characterized in that: The inclination angle of the oblique edge (121) is 60 degrees to 80 degrees.

8. A fan module, characterized in that: It comprises the fan blade structure as claimed in any one of claims 1 to 7.

9. An electronic product, characterized in that: It comprises the fan blade structure as claimed in any one of claims 1 to 7 or the fan module as claimed in claim 8.

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