Noise reducing fan blade

Abstract

A noise reduction fan blade includes a hub and a plurality of blades extending radially outward from the hub, each of the blades having a windward surface, a leeward surface, a convex edge portion, a concave edge portion and a side edge portion. A noise reduction element is disposed on the convex edge portion of each of the blades. The noise reduction elements on the blades enable the fan blade to rotate stably and reduce noise generated during rotation of the fan blade.

Description

Technical Field

[0001] This utility model relates to a fan, and more particularly to a fan blade structure that has a noise reduction effect when the fan blades rotate. Background Technology

[0002] A small computer fan is a fan used to cool computer cases or heatsinks. It may be inside the case, on the outer edge of the case, or mounted on the heatsink fins. The purpose of a fan is to bring cooler air into the case, expel hotter air from inside, or allow air to pass through the heatsink to cool other components.

[0003] The blades of current small fans generally consist of a hub and a plurality of blades formed around the hub, with each blade radially distributed around the hub. Each blade has a smooth, curved outer surface. When the blades of a small fan rotate, they generate airflow. Because the smooth outer surface of each blade cannot effectively confine the airflow forward, resistance is easily created, causing airflow to slip and be lost on the smooth outer surface of each blade. This also creates a buzzing sound at the tail of each blade, resulting in significant noise. Similarly, the small pressure difference between the front and back of each blade reduces the fan's efficiency, significantly diminishing the "quiet" performance of small fans and consequently making them less competitive in the market.

[0004] Therefore, the problem to be solved in this work is how to improve the fan blades of a small fan so that they do not produce noise when rotating. Utility Model Content

[0005] Therefore, the main purpose of this invention is to add multiple noise reduction elements to multiple blades of the fan blade, so that the fan blade can rotate stably and the noise generated when the blade rotates can be reduced.

[0006] To achieve the above objectives, this invention provides a noise-reducing fan blade, comprising: a hub and a plurality of blades extending radially outward from the hub, each blade including a windward surface, a leeward surface, a flange portion, a concave flange portion, and a side flange portion. A noise-reducing element is provided on the flange portion of each blade.

[0007] Furthermore, the noise reduction element is claw-shaped.

[0008] Furthermore, the noise reduction element is composed of a plurality of claws, with a triangular or conical inclined channel between each claw.

[0009] Furthermore, a ring wall is connected to the side edge of these blades.

[0010] Furthermore, these noise reduction elements are disposed adjacent to the flange portion of the blade and the annular wall.

[0011] Furthermore, these blades are wavy in shape.

[0012] Furthermore, a guide section is raised on the leeward surface of these blades.

[0013] Furthermore, the fan blade is mounted on a support base, the center of which protrudes upward to form a central shaft with a shaft hole. The support base has a plurality of radially arranged protrusions on its circumference, and these protrusions are fixedly connected to an external frame or heat dissipation mechanism.

[0014] Furthermore, a circuit board and a coil assembly are sequentially mounted on the support.

[0015] Furthermore, the hub is fixed to one end of a shaft at its center, and a magnetic element is provided on its inner wall. The shaft is connected to the shaft hole of the central shaft, and the magnetic element is installed on the support corresponding to the coil assembly.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a 3D schematic diagram of the fan's appearance in this creation;

[0019] Figure 2 This is a schematic diagram of the bottom view of the fan in this work;

[0020] Figure 3 This is a top view illustration of the fan blades in this work;

[0021] Figure 4 for Figure 3 A schematic diagram of the side section of the fan blade.

[0022] In the picture: 10: Fan

[0023] 1: Support base

[0024] 11: Convex column

[0025] 2: Fan blades

[0026] 21: Wheel hub

[0027] 22: Blade

[0028] 221: Wind-driving surface

[0029] 222: Leeward side

[0030] 223: Flange portion

[0031] 224: Recessed edge

[0032] 225: Lateral edge

[0033] 226: Noise Reduction Components

[0034] 2261: Fingers

[0035] 2262: Sloping Channel

[0036] 227: Airflow guide

[0037] 23: Surrounding Wall

[0038] 24: Axis. Detailed Implementation

[0039] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0041] In this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0042] The technical details and specific descriptions of this work are explained below with accompanying illustrations:

[0043] Please see Figure 1 , 2 These are a three-dimensional schematic diagram of the fan's exterior and a bottom view schematic diagram of the fan in this work. As shown in the figures: Figure 1 and Figure 2 The fan 10 disclosed herein includes a support 1 and a fan blade 2 pivotally connected to the support 1. When the fan blade 2 is driven to rotate, a noise reduction element 226 added to the fan blade 2 reduces the noise generated during rotation.

[0044] The support base 1 has a centrally projecting shaft (not shown) with a shaft hole. A plurality of radially arranged protrusions 11 are provided on the circumference of the support base 1, and these protrusions 11 are fixedly connected to an external frame (not shown) or a heat dissipation mechanism (not shown). Furthermore, a circuit board (not shown) and a coil assembly (not shown) are sequentially mounted on the support base 1. The circuit board is electrically connected to the coil assembly, and controls the drive of the coil assembly to drive the fan blade 2 to rotate. Simultaneously, the circuit board monitors and controls various operations of the fan blade 2 and performs detection.

[0045] The fan blade 2 includes a hub 21 and a plurality of blades 22 extending radially outward from the hub 21. The hub 21 is fixedly mounted internally to a shaft 24 (e.g., ...). Figure 4 The magnetic element (not shown) is provided on one end of the shaft 24 and its inner wall is connected to the shaft hole (not shown) of the central shaft, so that the magnetic element is mounted on the support 1 corresponding to the coil assembly. Furthermore, each blade 22 is wavy, and each blade 22 includes a windward surface 221, a leeward surface 222, a flange 223, a concave flange 224, and a side edge 225. A ring wall 23 is connected to the side edge 225 of these blades 22. In this drawing, the number of waves in the wavy shape is, but not limited to, three consecutive connected waves.

[0046] A noise reduction element 226 is provided on the flange portion 223 of each blade 22, and the noise reduction element 226 is arranged adjacent to the annular wall 23. In this figure, the noise reduction element 226 has a claw-shaped design, and the noise reduction element is composed of a plurality of claws 2261. A triangular or conical inclined channel 2262 is provided between each claw 2261. When the fan blade 2 is driven to rotate, air can pass quickly through the inclined channel 2262, so that the fan blade 2 can reduce the generation of noise.

[0047] It is worth mentioning that a guide section 227 is raised on the leeward side 222 surface of each blade 22. This guide section 227 allows air to flow quickly when the blades 22 rotate, reducing induced drag. Combined with the wave-shaped blade design, this increases airflow and air pressure when the fan blades 2 rotate, thereby improving heat dissipation. In this diagram, the guide section 227 is located at the center of the leeward side 222.

[0048] Please see Figure 3 , 4 This is a top view illustration of the fan blades in this work. Figure 3 A cross-sectional view of the fan blades is shown below. Figure 1 , 2 As shown in the figure: After the fan blade 2 is installed on the support base 1, the circuit board (not shown in the figure) controls the drive coil group (not shown in the figure) to generate magnetic force to drive the magnetic element (not shown in the figure) to make the fan blade 2 rotate.

[0049] When the fan blade 2 rotates, since each blade 22 is designed with a wave shape, the guide portion 227 raised on the leeward side 222 of each blade 22 is designed to reduce induced resistance, so that the air volume and air pressure can be increased when the blades 22 rotate, thereby improving the heat dissipation effect.

[0050] During the rotation of the fan blade 2, when the airflow passes through the noise reduction element 226 on the flange 223 of the blades 22, the airflow can pass through quickly, thus reducing the noise generated when the fan blade 2 rotates and making the fan blade 2 rotate more stably.

[0051] However, the above description is only a preferred embodiment of this invention and is not intended to limit the scope of patent protection of this invention. Therefore, all equivalent changes made using the content of this invention's specification or drawings are similarly included within the scope of protection of this invention and are hereby stated.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A noise-reducing fan blade, characterized in that, include: One wheel hub; A plurality of blades extending radially outward from the hub, each blade comprising a windward surface, a leeward surface, a flange, a concave flange, and a side flange. A noise reduction element is provided on the flange portion of each blade.

2. The noise-reducing fan blade according to claim 1, characterized in that, The noise reduction element is claw-shaped.

3. The noise-reducing fan blade according to claim 2, characterized in that, The noise reduction element consists of a plurality of claws, with a triangular or conical inclined channel between each claw.

4. The noise-reducing fan blade according to claim 1, characterized in that, A ring wall is connected to the side edge of these blades.

5. The noise-reducing fan blade according to claim 4, characterized in that, These noise reduction elements are located on the flange of the blade and are positioned adjacent to the annular wall.

6. The noise-reducing fan blade according to claim 1, characterized in that, These blades are wavy in shape.

7. The noise-reducing fan blade according to claim 1, characterized in that, A guide section is raised on the leeward surface of these blades.

8. The noise-reducing fan blade according to claim 1, characterized in that, The fan blades are mounted on a support base, which has a central shaft protruding upward from the center. The central shaft has a shaft hole, and a plurality of radially arranged protrusions are provided on the circumference of the support base. These protrusions are fixedly connected to the external frame or heat dissipation mechanism.

9. The noise-reducing fan blade according to claim 8, characterized in that, A circuit board and a coil assembly are sequentially mounted on the support.

10. The noise-reducing fan blade according to claim 9, characterized in that, The hub is fixed at one end of a shaft, and a magnetic element is provided on its inner wall. The shaft is connected to the shaft hole of the central shaft, and the magnetic element is installed on the bearing seat corresponding to the coil assembly.

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