Fan wheel

Abstract

A fan wheel for solving the problem that the fan blades are easily affected by air resistance and generate shaking or even deformation, which comprises: a hub; a plurality of fan blades connected to the hub; and a plurality of ribs connected to the plurality of fan blades, wherein one end of each rib is connected to the hub, and each fan blade intersects at least one of the aforementioned ribs.

Description

Technical Field

[0001] The present invention relates to a fan wheel, and more particularly to a fan wheel having ribs on the fan blades. Background Art

[0002] With the development requirements of thinner and higher-performance electronic products, in addition to meeting the heat dissipation requirements of electronic products, the cooling fan further pursues miniaturization. Therefore, the existing cooling fans usually reduce the overall size by thinning the fan blades.

[0003] However, although the fan blades of the existing cooling fans can reduce the overall size to meet the miniaturization requirements, the strength of the thinned blades is also reduced. Therefore, when the fan blades rotate, the stability of the fan blades is poor, and they are easily affected by air resistance and shake or even deform, which is likely to cause large vibrations and noises, seriously affecting the operating stability of the fan. Another existing cooling fan has a connecting ring connected to the free ends of the fan blades to connect the fan blades to each other to improve the stability of the fan blades. However, on the premise that the fan blades are thinned and the strength is reduced, even if the fan blades are connected to each other, it is still difficult to provide good stability. Summary of the Invention

[0004] To solve the above problems, the purpose of the present invention is to provide a fan wheel that can prevent the fan blades from shaking during the rotation of the fan wheel.

[0005] The fan wheel of the present invention includes: a hub; a plurality of fan blades connected to the hub; and a plurality of ribs connected to the plurality of fan blades, and one end of each rib is connected to the hub, and each fan blade intersects at least one of the foregoing ribs.

[0006] Accordingly, the fan wheel of the present invention forms a plurality of ribs by extending from the hub to be combined with the plurality of fan blades, so that each fan blade intersects at least one of the ribs, which can stabilize the positions of the fan blades, prevent the fan blades from being affected by air resistance and shaking and deforming during the rotation of the fan wheel, and can achieve the effects of reducing noise generation and improving heat dissipation efficiency.

[0007] Wherein, the hub has an annular wall, and the annular wall may have an extension portion that extends radially outward from the annular wall to be connected to the plurality of fan blades. In this way, a relatively large bonding area can be formed between the plurality of extension portions and the hub, which has the effect of improving the stability of the fan blades and being not easily shaken by air resistance.

[0008] Among them, the hub has an annular wall, each blade has a first end and a second end respectively, the first end is connected to the annular wall, there is a first blade edge and a second blade edge opposite to each other between the first end and the second end, and the plurality of ribs are located between the first blade edge and the second blade edge. In this way, it has the function of stabilizing the positions of the blades.

[0009] Among them, the hub has an annular wall, each blade can have a first end and a second end respectively, the first end is connected to the annular wall, there is a first blade edge and a second blade edge opposite to each other between the first end and the second end, and the plurality of ribs are connected to the first blade edge or connected to the second blade edge. In this way, it has the function of stabilizing the positions of the blades.

[0010] Among them, the plurality of ribs penetrate through each blade and are flush with the first blade edge or the second blade edge. In this way, it has the function of stabilizing the positions of the blades.

[0011] Among them, the hub has an annular wall, each blade has a first end and a second end respectively, the first end is connected to the annular wall, there is a first blade edge and a second blade edge opposite to each other between the first end and the second end, and the plurality of ribs protrude from the first blade edge or protrude from the second blade edge to form convex ribs. In this way, it has the function of stabilizing the positions of the blades.

[0012] Among them, the hub has an annular wall, each blade can have a first end and a second end respectively, the first end is connected to the annular wall, there is a first blade edge and a second blade edge opposite to each other between the first end and the second end, and the plurality of ribs are connected to the first blade edge and the second blade edge. In this way, it has the function of further enhancing the stability of the plurality of blades.

[0013] Among them, the plurality of ribs connecting the first blade edge are in alignment with the plurality of ribs connecting the second blade edge. In this way, it has the function of further enhancing the stability of the plurality of blades.

[0014] Among them, the plurality of ribs connecting the first blade edge are misaligned with the plurality of ribs connecting the second blade edge. In this way, it has the function of further enhancing the stability of the plurality of blades.

[0015] Among them, each rib has a bonding end and a protruding end opposite to each other, the bonding end is bonded to the hub, the protruding end extends towards the second end direction of the blade, there is a fixing section between the bonding end and the protruding end, the fixing section is bonded to the plurality of blades, and the fixing section is a straight line segment. In this way, it has the function of further enhancing the stability of the plurality of blades.

[0016] Among them, each rib has a relative joint end and a protruding end. The joint end is joined to the hub, and the protruding end extends towards the second end of the fan blade. There is a fixed section between the joint end and the protruding end, and the fixed section is joined to the multiple fan blades. The fixed section is an arc section. In this way, the arc section can enable the rib to cooperate with the fan wheel in a circular shape and have a larger extension area, which has the effect of improving the overall stability of the multiple fan blades.

[0017] Among them, there is a guiding arc surface on each side of the relative two sides of each fixed section. In this way, when the rib is adjacent to the windward side of the fan blade, it can guide the flow of air, so as to reduce the influence of the rib on the air flow entering the fan blade.

[0018] Among them, the protruding ends of the ribs are located between the hub and the second ends of the multiple fan blades. In this way, the extension range of the multiple ribs in the radial direction of the multiple fan blades can be reduced, the windward area of the multiple fan blades can be increased, which has the effect of maintaining the stability of the multiple fan blades and the balance of the air volume driven.

[0019] Among them, the ratio of the radial distance from the ring wall to the protruding end of the rib to the radial distance from the ring wall of the hub to the second ends of the multiple fan blades is preferably 0.3 to 1 at the protruding end. In this way, on the premise that each fan blade intersects with at least one rib at one place, the windward area of the multiple fan blades can be increased, which has the effect of maintaining the stability of the multiple fan blades and the balance of the air volume driven.

[0020] Among them, the fixed section between the two fan blades is formed by extending from the first leaf edge of the fan blade connected between each two fan blades to the second leaf edge. In this way, the stability of the multiple fan blades can be further improved.

[0021] Among them, a ring rib is joined to the second ends of the multiple fan blades. In this way, the second ends of the multiple fan blades can be prevented from shaking.

[0022] Among them, each fan blade intersects with at least two ribs. In this way, the stability of the multiple fan blades can be further improved. Brief Description of the Drawings

[0023] Figure 1 Is a perspective view of the first embodiment of the present invention.

[0024] Figure 2 Is a top view of the first embodiment of the present invention.

[0025] Figure 3 Is the sectional view along the Figure 2 A-A line of

[0026] Figure 4 Is the sectional view along the Figure 3 B-B line of

[0027] Figure 5 Isometric view of the second embodiment of the present invention.

[0028] Figure 6 Top view of the third embodiment of the present invention.

[0029] Explanation of reference numerals

[0030] 1 Wheel hub

[0031] 11 Top

[0032] 12 Ring wall

[0033] 121 Extension

[0034] 2 Blades

[0035] 2a First end

[0036] 2b Second end

[0037] 21 First leaf edge

[0038] 22 Second leaf edge

[0039] 23 Ring rib

[0040] 3 Ribs

[0041] 3a Joining end

[0042] 3b Protruding end

[0043] 3c Fixed section

[0044] 31 Guide arc surface Detailed implementation manners

[0045] To make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following specifically lists the preferred embodiments of the present invention and, in conjunction with the accompanying drawings, provides a detailed description as follows:

[0046] Throughout the present invention, directional terms or their approximate terms, such as "front", "rear", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer", "side", etc., mainly refer to the directions of the accompanying drawings. Each directional term or its approximate term is only used to assist in explaining and understanding the embodiments of the present invention and is not used to limit the present invention.

[0047] Throughout the present invention, the use of the quantifiers "a" or "an" for elements and components is only for convenience and to provide the general meaning of the scope of the present invention; in the present invention, it should be interpreted as including one or at least one, and the singular concept also includes the plural case, unless it clearly means otherwise.

[0048] As used throughout this invention, approximate terms such as "combination", "assembly", or "joining" mainly include forms such as being separable without damaging the components after connection or being inseparable after connection, which can be selected by those with ordinary knowledge in the art according to the material of the components to be connected or the assembly requirements.

[0049] Please refer to Figure 1 As shown, this is the first embodiment of the fan wheel of the present invention, which includes a hub 1, a plurality of fan blades 2, and a plurality of ribs 3. The plurality of fan blades 2 are connected to the outer periphery of the hub 1, and the plurality of ribs 3 are combined with the plurality of fan blades 2. The fan wheel of the present invention can be applied to fans such as centrifugal fans or axial fans. Hereinafter, a centrifugal fan will be taken as an example for illustration, but it is not limited thereto.

[0050] The hub 1 has a top 11, which can be used to combine with a rotating shaft of a fan. For example, the hub 1 can be made of plastic, so that the top 11 can be injection-molded and coated to combine with the rotating shaft, or the hub 1 can be made of metal, and the top 11 can be combined with the rotating shaft by means such as tight fitting or laser welding, which are common means for those skilled in the art and will not be elaborated herein. The hub 1 can have an annular wall 12, which can be connected to the periphery of the top 11, so that the annular wall 12 and the top 11 can form a space for setting magnetic components and accommodating components such as stators. The annular wall 12 can be used to combine the plurality of fan blades 2. In this embodiment, the annular wall 12 can have an extension 121, which can extend radially outward from the annular wall 12 (i.e., in the direction away from the axis) to connect to the plurality of fan blades 2. For example, the extension 121 can be made of plastic to cover the annular wall 12. Thus, on the premise of thinning the plurality of fan blades 2, a relatively large bonding area can be formed between the plurality of fan blades 2 and the annular wall 12 of the hub 1 through the plurality of extensions 121, which has the effect of improving the bonding stability of the fan blades and being not easily broken.

[0051] The plurality of fan blades 2 can be integrally connected to the extension portion 121 by injection molding. For example, high molecular materials such as liquid crystal polymer (LCP) can be used, and preferably, fiber materials such as carbon fiber, mineral fiber, or a combination of mineral fiber and glass fiber are further added; alternatively, preferably, it can be integrally injection molded by mixing metal powders such as iron, aluminum, copper, or metal alloys in a high molecular binder to enhance its structural strength. In this embodiment, the thickness of each fan blade 2 can be 0.05 - 0.2 mm to maintain the overall thinness of the fan, and the number of the fan blades 2 is preferably ≥ 70 so that the plurality of thin fan blades 2 can generate sufficient air volume. Each fan blade 2 has a first end 2a and a second end 2b respectively. The first end 2a can be connected to the annular wall 12 of the hub 1, and the second end 2b is away from the hub 1. A first leaf edge 21 and a second leaf edge 22 can be opposite to each other between the first end 2a and the second end 2b, and the first leaf edge 21 and the second leaf edge 22 can be used to combine the plurality of ribs 3. The plurality of fan blades 2 can be in various forms. For example, the first end 2a and the second end 2b can be located at the same radial position, that is, the line connecting the first end 2a and the second end 2b can pass through the axis of the hub 1 so that each fan blade 2 is radially connected to the hub 1, or the line connecting the first end 2a and the second end 2b can not pass through the axis of the hub 1 so that each fan blade 2 is tangentially connected to the annular wall 12. The present invention does not limit this. In this embodiment, the plurality of fan blades 2 can be in a cambered shape, whereby the plurality of fan blades 2 can have a better air flow guiding effect.

[0052] Please refer to Figure 2 、 Figure 3 、 Figure 4As shown, the multiple ribs 3 can respectively extend radially from the hub 1 to be combined with the multiple fan blades 2, so that each fan blade 2 intersects at least one of the ribs 3. Thereby, the multiple ribs 3 can improve the stability of the multiple fan blades 2 and prevent them from shaking or deforming due to the influence of air resistance. Specifically, the multiple ribs 3 respectively have a relative joint end 3a and a protruding end 3b. The joint end 3a is combined with the hub 1, and the protruding end 3b can extend toward the second end 2b of the fan blade 2. There can be a fixed section 3c between the joint end 3a and the protruding end 3b, and the fixed section 3c is combined with the multiple fan blades 2. For example, the fixed section 3c can be a straight line segment (not shown in the figure) that linearly extends from the hub 1 toward the end edge formed by the second ends 2b of the multiple fan blades 2. Or in this embodiment, the fixed section 3c is an arc segment. Thereby, compared with the straight line segment, the arc segment can enable the rib 3 to have a larger extension area in cooperation with the circular shape of the fan wheel, enabling each rib 3 to be combined with a larger number of fan blades 2, and having the effect of improving the overall stability of the multiple fan blades 2. In addition, the rib 3 is preferably not parallel to the fan blade 2, so that each fan blade 2 intersects at least one of the ribs 3.

[0053] It should be noted that the multiple ribs 3 can protrude from the first leaf edge 21 or the second leaf edge 22 of each fan blade 2 to form convex ribs. Or, the joint end 3a can be combined with the extension part 121 of the annular wall 12, so that the rib 3 extends from the extension part 121 away from the hub 1, and each rib 3 penetrates through each fan blade 2, so that the multiple ribs 3 can be located between the first leaf edge 21 and the second leaf edge 22 of each fan blade 2. Thereby, the overall height of the fan can be reduced, having the effect of thinning. In this embodiment, each rib 3 is preferably connected to the first leaf edge 21 or the second leaf edge 22 of each fan blade 2, so that each rib 3 is flush with the first leaf edge 21 or the second leaf edge 22. The connection part of each rib 3 and the fan blade 2 is preferably in the form of a guiding bevel angle or a guiding arc angle. Thereby, a relatively large bonding area can be formed to improve the bonding stability. In addition, the two opposite sides of each fixed section 3c (that is, the two sides on the same radial plane) can respectively have a guiding arc surface 31. When the rib 3 is a convex rib, the guiding arc surface 31 can surround the fixed section 3c of the entire rib 3. And when the fixed section 3c penetrates through the multiple fan blades 2, the guiding arc surface 31 is located at the fixed section 3c between every two fan blades 2. Thereby, when the rib 3 is adjacent to the windward side of the fan blade 2, the flow of the air current can be guided to reduce the influence of the rib 3 on the air current entering the fan blade 2. In addition, the fixed section 3c between the two fan blades 2 can also be formed to extend from the first leaf edge 21 of the fan blade 2 connecting between every two fan blades 2 to the second leaf edge 22. Thereby, the stability of the multiple fan blades 2 can be further improved.

[0054] The number of the ribs 3 may be balanced in the area formed by the plurality of fan blades 2 to avoid wobbling of the fan wheel during rotation. The present invention does not limit this. For example, the number of the ribs 3 may be two and located on opposite sides of the hub 1. At this time, the extending areas of the two ribs 3 may respectively account for at least 50% of the area formed by the plurality of fan blades 2 to ensure that each fan blade 2 and the rib 3 can intersect at least at one point. In addition, the extending areas of the ribs 3 may overlap each other, that is, at least a part of the fan blades 2 can respectively intersect with more than two ribs 3, whereby the stability of the plurality of fan blades 2 can be further improved.

[0055] Please refer to Figure 5 as shown. It is a second embodiment of the fan wheel of the present invention. The plurality of ribs 3 may be respectively located at the first leaf edge 21 and the second leaf edge 22 of the plurality of fan blades 2. Similarly, the plurality of ribs 3 may respectively protrude from the first leaf edge 21 and the second leaf edge 22 of each fan blade 2 to form convex ribs, or are respectively connected to the first leaf edge 21 and the second leaf edge 22 of each fan blade 2 to make the plurality of ribs 3 flush with the first leaf edge 21 and the second leaf edge 22. In addition, the plurality of ribs 3 connected to the first leaf edge 21 and the plurality of ribs 3 connected to the second leaf edge 22 may be in alignment or misaligned. The present invention does not limit this.

[0056] Please refer to Figure 6 as shown. It is a third embodiment of the fan wheel of the present invention. The protruding ends 3b of the ribs 3 are located between the hub 1 and the edge formed by surrounding the second ends 2b of the plurality of fan blades 2. Thereby, the extending range of the plurality of ribs 3 in the radial direction of the plurality of fan blades 2 can be reduced, and on the premise that each fan blade 2 intersects with at least one rib 3, the windward area of the plurality of fan blades 2 can be increased, which has the function of maintaining the stability of the plurality of fan blades 2 and the balance of the air volume. In this embodiment, the ratio of the radial distance from the annular wall 12 to the protruding end 3b of the rib 3 to the radial distance from the annular wall 12 of the hub 1 to the second ends 2b of the plurality of fan blades 2 is 0.3 to 1. In addition, a ring rib 23 may be combined with the second ends 2b of the plurality of fan blades 2 to avoid wobbling of the second ends 2b of the plurality of fan blades 2.

[0057] In the system of the electronic device, when detecting the rotation of the fan wheel under the same noise, a fan with a fan wheel without the rib 3 using the prior art (Group 1); a fan with a fan wheel having the rib 3 as in the above third embodiment (Group 2), and a fan with a fan wheel having the rib 3 as in the above first embodiment (Group 3) are used to generate the wind pressure and air volume. The results are shown in Table 1.

[0058] Table 1. Air volume change under different static pressures.

[0059]

[0060] Please refer to Table 1. When the fan with the ribbed 3 - blade wheel operates in the system of the electronic device under the same noise, it has a higher air volume compared to the fan without the ribbed 3 - blade wheel in the prior art, which proves that the blade wheel of the present invention can indeed stabilize the fan blades to increase the air volume.

[0061] In summary, for the blade wheel of the present invention, a plurality of ribs are formed by extending from the hub and are combined with the plurality of fan blades, so that each fan blade intersects at least one of the ribs, which can stabilize the positions of the fan blades and prevent the fan blades from shaking and deforming under the influence of air resistance during the rotation of the blade wheel. It is worth noting that compared with the prior art where the free ends of the existing fan blades are connected to each other by a connecting ring, the plurality of ribs of the blade wheel of the present invention are formed by extending from the hub, that is, each of the plurality of ribs has a combined end connected to the hub, so that the plurality of ribs have sufficient strength, which can indeed further improve the stability of the plurality of fan blades, achieve the effect of reducing noise generation, and improve the heat dissipation efficiency.

[0062] Although the present invention has been disclosed by using the above - mentioned preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications to the above - mentioned embodiments without departing from the spirit and scope of the present invention, and these still belong to the technical scope protected by the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims

1. A fan wheel, characterized in that, Comprising: A hub having an annular wall with an extension; A plurality of blades connected to the hub, each blade having a first end and a second end, the first end being connected to the annular wall, and having a first blade edge and a second blade edge opposite to each other between the first end and the second end; and A plurality of ribs connecting the plurality of blades, and one end of each rib being connected to the hub, each blade intersecting at least one of the foregoing ribs, the extension being formed by radially outward extension of the annular wall to connect to the plurality of blades, the plurality of ribs being located between the first blade edge and the second blade edge, each rib having a connecting end and a protruding end opposite to each other, the connecting end being connected to the hub, the protruding end extending towards the second end of the blade, there being a fixing section between the connecting end and the protruding end, the fixing section being connected to the plurality of blades, the fixing section being an arc section, the protruding end of each rib being located between the hub and the second ends of the plurality of blades, the ratio of the radial distance from the annular wall to the protruding end of the rib to the radial distance from the annular wall of the hub to the second ends of the plurality of blades being 0.3 to 1.

2. The fan wheel according to claim 1, characterized in that, The plurality of ribs are connected to the first blade edge or connected to the second blade edge.

3. The fan wheel according to claim 2, characterized in that, The plurality of ribs penetrate through each blade and are flush with the first blade edge or the second blade edge.

4. The fan wheel according to claim 1, characterized in that, The plurality of ribs are connected to the first blade edge and the second blade edge.

5. The fan wheel according to claim 4, wherein The plurality of ribs connecting the first blade edge are in alignment with the plurality of ribs connecting the second blade edge.

6. The fan wheel according to claim 4, wherein, The plurality of ribs connecting the first blade edge are misaligned with the plurality of ribs connecting the second blade edge.

7. The fan wheel according to claim 1, characterized in that, Each side of the fixing section has a guiding arc surface respectively.

8. The fan wheel according to claim 1, wherein, The fixing section between two blades is formed to extend from the first blade edge of the blade connecting between the two blades to the second blade edge.

9. The fan wheel according to claim 1, characterized in that, The second ends of the plurality of blades are connected to an annular rib.

10. The fan wheel according to claim 1, characterized in that, Each blade intersects at least two of the ribs.

Images