Annular fan structure

Abstract

A ring-shaped fan structure includes a fan. The fan has a hub and a plurality of blades extending radially outward from the hub. Each of the blades has a wind driving surface, a wind back surface, a convex edge portion, a concave edge portion, and a side edge portion. The cross section of the convex edge portion to the concave edge portion of each of the blades is inclined. The side edge portion of each of the blades is overlapped on the wind driving surface of the adjacent blade to form a polygonal ring wall with an inclined cut. When the fan is installed on a fan frame and rotates, the blades can produce a large wind output, and the polygonal ring wall with the inclined cut can reduce the noise generated during rotation.

Description

Technical Field

[0001] This utility model relates to a fan, and more particularly to a fan blade structure that reduces the noise generated by the blades when they 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 fan blades of a small fan generally include: a hub and a plurality of blades formed around the periphery of the hub, the blades being radially distributed around the periphery of the hub. Additionally, an upright or vertical ring or wall is connected to the side edge of the plurality of blades (as shown in the drawings of Taiwan Utility Model Patent No. M660246). Figure 1 The exposed ring 22 is shown.

[0004] These fan blades are mounted on the fan frame and rotate under the control of the circuit board and driven by the coil. While they generate a significant airflow to meet cooling requirements during rotation, the rings or ferrules attached to the side edges of the multiple blades tend to generate considerable noise during rotation. This noise arises because the rings or ferrules are connected to the blades in an upright or vertical manner.

[0005] Therefore, the challenge that this creation aims to address is how to reduce noise generation without reducing airflow output when the fan blades are rotating. Utility Model Content

[0006] Therefore, the main purpose of this creation is to address the shortcomings of tradition. This creation redesigns the fan blades so that each blade overlaps to form an inclined polygonal flower-shaped ring. When the fan blades are mounted on the fan frame and rotate, these blades can not only generate a large air volume output, but the inclined ring can also reduce the noise generated during rotation.

[0007] To achieve the above objectives, this invention provides a ring-shaped fan blade structure, comprising: a fan blade. The fan blade has a hub and a plurality of blades extending radially outward from the hub. Each of the blades has a windward surface, a leeward surface, a flange, a concave flange, and a side edge; the cross-section from the flange to the concave flange of each blade is inclined, and the side edge of each blade overlaps the windward surface of adjacent blades to form a ring wall.

[0008] Furthermore, after the side edge of each blade is overlapped with the surface of the wind-driving surface of the adjacent blade, the overlapping blades form a polygonal flower-shaped ring wall.

[0009] Furthermore, the cross-section of the ring wall is inclined.

[0010] Furthermore, the inclined shape is either trumpet-shaped or conical.

[0011] Furthermore, these blades are semi-circular arc-shaped.

[0012] Furthermore, the hub has an internal mounting space, the inner wall of which a magnet can be mounted, and the mounting space has a shaft portion for connecting to a spindle.

[0013] 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

[0014] 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:

[0015] Figure 1 This is a three-dimensional schematic diagram of the fan blades for this creation;

[0016] Figure 2 for Figure 1 Another perspective illustration;

[0017] Figure 3 for Figure 1 A top-down view;

[0018] Figure 4 In order to be in Figure 3 A cross-sectional view at position 4-4;

[0019] Figure 5 In order to be in Figure 4 A cross-sectional view at position 5-5.

[0020] In the picture: 10: Fan blade

[0021] 101: Wheel hub

[0022] 1011: Installation space

[0023] 1012: Inner wall

[0024] 1013: Shaft

[0025] 102: Blade

[0026] 1021: Wind-driving surface

[0027] 1022: Leeward side

[0028] 1023: Flange portion

[0029] 1024: Concave edge

[0030] 1025: Lateral edge

[0031] 103: The surrounding wall. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] The technical details and specific descriptions of this work are explained below with accompanying illustrations:

[0036] Please see Figure 1 , 2 This is a three-dimensional schematic diagram of the fan blades in this creation. Figure 1A bottom-view schematic diagram. As shown in the figure: The annular fan blade structure of this creation, the fan blade 10, includes a hub 101 and a plurality of blades 102 extending radially outward from the hub 101.

[0037] The hub 101 has an internal mounting space 1011. The inner wall 1012 of the mounting space 1011 is used to mount magnets (not shown). The mounting space 1011 has a shaft portion 1013, which can be connected to a shaft (not shown). When the fan blade 10 is assembled with the fan frame (not shown), the shaft is inserted into the central shaft (not shown) of the fan frame. The mounting space 1011 covers the coil (not shown) of the fan frame. When the coil is driven and generates a magnetic field, it can push the magnet (not shown) located on the inner wall 1012 of the mounting space 1011, causing the fan blade 10 to rotate on the fan frame.

[0038] Furthermore, each blade 102 is semi-circular in shape, and each blade 102 has a windward surface 1021, a leeward surface 1022, a flange portion 1023, a concave flange portion 1024, and a side edge portion 1025. The side edges 1025 of these blades 102 are overlapped on the windward surfaces 1021 of adjacent blades 102 to form a fan-blade structure.

[0039] Please see Figure 3 , tied to Figure 1 A top-down view diagram; see also the attached diagram. Figure 1 , 2 As shown in the figure: Since each blade 102 is semi-circular, and the side edge 1025 of each blade 102 is superimposed on the surface of the wind-driving surface 1021 of the adjacent blade 102, after each semi-circular blade 102 is superimposed, it forms an inclined polygonal flower-shaped ring wall 103.

[0040] It is worth mentioning that the optimal overlapping position of the side edge 1025 of each blade 102 onto the windward surface 1021 of the adjacent blade 102 is, for example, at half the total length of the windward surface 1021 (central position), one-quarter or one-eighth position, etc. Therefore, different overlapping positions will change the curvature of each petal on the polygonal flower-shaped ring wall 103.

[0041] When the fan blade 10 rotates on the fan frame, because each blade 102 is designed with a semi-circular arc, it can generate a large air volume output when it is installed on the fan (not shown in the figure) and rotates, thereby increasing the heat dissipation effect.

[0042] Please see Figure 4 , 5 , tied to Figure 3 Schematic diagram of cross-section at position 4-4 and its connection to Figure 4 A cross-sectional view at position 5-5; see also the diagram. Figures 1 to 3 As shown in the figure: Because the cross-section of the flange portion 1023 to the concave portion 1024 of each blade 102 in this creation is designed to be inclined, the overlapping parts form an inclined polygonal flower-shaped ring wall 103.

[0043] Therefore, when the fan blade 10 is installed on the fan frame (not shown) and rotates, the semi-circular design of the blades 102 can generate a large air volume output. In addition, the overlapping of each blade 102 forms an inclined ring wall 103, which reduces noise generation during rotation, making the fan blade 10 quieter during rotation.

[0044] It is worth mentioning that the inclined polygonal floral ring wall 103 in this diagram can also be trumpet-shaped or cone-shaped.

[0045] 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.

[0046] 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.

[0047] 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 ring-shaped fan blade structure, characterized in that, include: A blade having a hub and a plurality of blades extending radially outward from the hub; Each of the blades has a windward surface, a leeward surface, a flange, a concave flange, and a side edge. The cross-section of the flange to the concave flange of each blade is inclined, and the side edge of each blade overlaps the windward surface of the adjacent blade to form a ring wall.

2. The annular fan blade structure according to claim 1, characterized in that, After the side edge of each blade is overlapped with the surface of the wind-driving surface of the adjacent blade, the overlapping blades form a polygonal flower-shaped ring wall.

3. The annular fan blade structure according to claim 2, characterized in that, The cross-section of the ring wall is inclined.

4. The annular fan blade structure according to claim 3, characterized in that, The tilted shape is either trumpet-shaped or cone-shaped.

5. The annular fan blade structure according to claim 1, characterized in that, These leaves are semi-circular arc-shaped.

6. The annular fan blade structure according to claim 1, characterized in that, The hub has an internal mounting space, the inner wall of which can be fitted with a magnet. The mounting space has a shaft portion for connecting to a spindle.

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