Fan blade structure and fan device

By increasing the number of blades and adopting a double-layer blade design, the maximum air volume and maximum static pressure of the fan device are improved, solving the problem of insufficient performance of existing fans and realizing airflow transmission over longer distances and greater flow rates.

CN223781725UActive Publication Date: 2026-01-09COOLER MASTER CO LTD
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Patent Information

Application Number
CN202520520176.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Priority Date
2025-02-12
Filing Date
2025-03-24
Publication Date
2026-01-09
Estimated Expiration
2035-03-24

AI Technical Summary

Technical Problem

The performance of existing fans cannot meet user needs, especially in terms of maximum airflow and maximum static pressure, making it difficult to simultaneously increase airflow and transmission distance.

Method used

Design a fan blade structure that increases the number of blades and adopts a double-layer blade design. The first and second blade sections are arranged along the hub axis to form an airflow space. The widths of the air inlet and outlet are designed according to a certain decreasing rule to improve airflow efficiency.

Benefits of technology

The maximum airflow of the fan unit is increased by 3%, and the maximum static pressure is increased by 51%, significantly improving the performance of the fan.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a fan device which comprises a fan support and a fan blade structure. The fan blade structure comprises a hub and a plurality of fan blades. The hub is rotatably arranged on the fan support. Each fan blade comprises a first blade part and a second blade part; one side of the first blade part and one side of the second blade part are connected to the hub. The first blade part and the second blade part are arranged in the axial direction of the hub. Therefore, the maximum air volume and the maximum static pressure of the air flow generated by the fan device can be improved, and the performance of the fan device can be further improved.
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Description

Technical Field

[0001] This utility model relates to a fan blade structure and a fan device, particularly a fan blade structure and a fan device having two blade sections. Background Technology

[0002] With the rapid development of technology, the computing power of processors has increased significantly, but it also generates a lot of heat. To ensure that the processor is not damaged by high heat, fans need to be installed in electronic products to dissipate the excessive heat from the processor, so that the processor can operate within a certain operating temperature range.

[0003] Users typically select fans based on characteristics such as maximum airflow and maximum static pressure. Maximum airflow refers to the volume of airflow generated by the fan exiting the exhaust vent when it is unobstructed; that is, the airflow passing completely through the exhaust vent when it is fully open. Maximum static pressure refers to the static pressure created by the airflow generated by the fan when the exhaust vent is completely blocked. Higher static pressure means a longer distance the airflow can travel. Generally speaking, the higher the maximum airflow and maximum static pressure, the greater the airflow generated by the fan, and the farther the airflow can travel, indicating better fan performance. However, current fan performance cannot meet user needs. Therefore, improving fan performance is one of the problems that researchers must solve. Utility Model Content

[0004] The present invention provides a fan blade structure and a fan device to improve the performance of the fan device.

[0005] An embodiment of this invention discloses a fan blade structure for mounting on a fan bracket, comprising a hub and a plurality of fan blades. The hub is rotatably mounted on the fan bracket. Each fan blade comprises a first blade portion and a second blade portion. One side of the first blade portion and the second blade portion is connected to the hub. The first blade portion and the second blade portion are arranged along the axial direction of the hub.

[0006] In the aforementioned fan blade structure, the first blade portion and the second blade portion each have a first side and a second side facing each other, the two first sides are connected to the hub, and the two first sides are directly connected.

[0007] In the aforementioned fan blade structure, the two second sides are directly connected.

[0008] In the aforementioned fan blade structure, the first blade portion and the second blade portion each have a third side and a fourth side, the two third sides together surround an air inlet, and the two fourth sides together surround an air outlet, the air inlet and the air outlet are used to allow airflow generated by the fan blades to pass through.

[0009] In the aforementioned fan blade structure, the width of the air inlet decreases from the middle section of the air inlet to the opposite sides of the air inlet, and the width of the air outlet decreases from the middle section of the air outlet to the opposite sides of the air outlet.

[0010] In the aforementioned fan blade structure, the first blade portion and the second blade portion are arc-shaped, and the arc of the first blade portion is greater than the arc of the second blade portion.

[0011] Another embodiment of this invention discloses a fan blade structure for mounting on a fan bracket, comprising a hub and a plurality of fan blades. The hub is rotatably mounted on the fan bracket. The fan blades are used to generate an airflow. Each fan blade includes a first blade portion and a second blade portion. One side of the first blade portion and the second blade portion is connected to the hub. The first blade portion and the second blade portion together surround an airflow space. The airflow space is used for airflow.

[0012] In the aforementioned fan blade structure, the first blade portion has a first outer side and a first inner side facing each other, and the second blade portion has a second outer side and a second inner side facing each other, with the first inner side and the second inner side located in the airflow space and facing each other.

[0013] In the aforementioned fan blade structure, the first outer surface, the first inner surface, the second outer surface, and the second inner surface are all curved, and the curvature of the first outer surface and the first inner surface is greater than the curvature of the second outer surface and the second inner surface.

[0014] In the aforementioned fan blade structure, the first blade portion and the second blade portion each have a first side and a second side facing each other, the two first sides are connected to the hub, and the two first sides are directly connected.

[0015] In the aforementioned fan blade structure, the first blade portion and the second blade portion each have a third side and a fourth side, the two third sides together surround an air inlet, the two fourth sides together surround an air outlet, and the air inlet and the air outlet are connected through the airflow space.

[0016] In the aforementioned fan blade structure, the width of the air inlet decreases from the middle section of the air inlet to the opposite sides of the air inlet, and the width of the air outlet decreases from the middle section of the air outlet to the opposite sides of the air outlet.

[0017] Another embodiment of the present invention discloses a fan device comprising a fan bracket and a fan blade structure. The fan blade structure includes a hub and a plurality of fan blades. The hub is rotatably mounted on the fan bracket. Each fan blade includes a first blade portion and a second blade portion. One side of the first blade portion and the second blade portion is connected to the hub. The first blade portion and the second blade portion are arranged along the axial direction of the hub.

[0018] According to the fan blade structure and fan device of the above embodiment, since each fan blade has a first blade portion and a second blade portion, the number of blades is increased by, for example, twice that of existing fan devices. The first and second blade portions are arranged axially along the hub and together surround the airflow space, allowing the airflow generated by the fan device to be blown towards the heat source through the airflow space. Therefore, the maximum airflow of the fan device can be increased, for example, from 75.93 cubic feet per minute (CFM) to 78.57 cubic feet per minute, i.e., the maximum airflow can be increased by, for example, 3%. The maximum static pressure of the fan device can be increased, for example, from 4.18 mmAq to 6.33 mmAq, i.e., the maximum static pressure can be increased by, for example, 51%. In this way, the maximum airflow and maximum static pressure generated by the fan device can be increased, thereby improving the performance of the fan device.

[0019] The above description of the present utility model and the following description of the embodiments are used to demonstrate and explain the principle of the present utility model, and to provide a further explanation of the scope of the patent application of the present utility model. Attached Figure Description

[0020] Figure 1 This is a perspective view of the fan device according to an embodiment of the present invention.

[0021] Figure 2 for Figure 1 A three-dimensional schematic diagram of the fan blade structure of a fan device.

[0022] Figure 3 for Figure 1 Another three-dimensional schematic diagram of the fan blade structure of the fan device.

[0023] Figure 4 for Figure 1 A top view of the fan blade structure of the fan device.

[0024] Figure 5 for Figure 4 A cross-sectional view of the fan blade structure along section line 5-5 of the fan device.

[0025] Figure 6 for Figure 4 A cross-sectional view of the fan blade structure along section line 6-6 of the fan device.

[0026] In the attached figures, the following labels are used:

[0027] 10: Fan assembly

[0028] 20: Fan bracket

[0029] 30: Fan blade structure

[0030] 31: Wheel hub

[0031] 32: Fan blade

[0032] 321: First blade section

[0033] 3211: First outer surface

[0034] 3212: First inner surface

[0035] 3213: First side

[0036] 3214: Second side

[0037] 3215: Third side

[0038] 3216: Fourth side

[0039] 322: Second blade section

[0040] 3221: Second outer surface

[0041] 3222: Second inner surface

[0042] 3223: First side

[0043] 3224: Second side

[0044] 3225: Third side

[0045] 3226: Fourth side

[0046] A~C: Direction

[0047] S: Airflow space

[0048] W1: Air Inlet

[0049] W2: Air vent Detailed Implementation

[0050] Please see Figures 1 to 3 . Figure 1 This is a perspective view of the fan device according to an embodiment of the present invention. Figure 2 for Figure 1 A three-dimensional schematic diagram of the fan blade structure of a fan device. Figure 3 for Figure 1 Another three-dimensional schematic diagram of the fan blade structure of the fan device.

[0051] The fan device 10 in this embodiment is, for example, an axial fan, and includes a fan bracket 20 and a blade structure 30. The fan bracket 20 is, for example, a base. The blade structure 30 includes a hub 31 and a plurality of blades 32. The hub 31 is rotatably mounted on the fan bracket 20. Each blade 32 includes a first blade portion 321 and a second blade portion 322. One side of the first blade portion 321 and the second blade portion 322 is connected to the hub 31, so that the hub 31 drives the first blade portion 321 and the second blade portion 322 of these blades 32 to generate an airflow.

[0052] The fan assembly 10 includes, for example, a drive component (not shown). The drive component includes a stator (not shown) and a rotor (not shown). The stator and rotor are, for example, matched magnets or coils. The stator is fixedly mounted on the fan bracket 20. The rotor is rotatably connected to the hub 31 and can rotate relative to the stator through electromagnetic effects, thereby driving the hub 31 to rotate relative to the fan bracket 20.

[0053] Please refer to the following: Figures 4 to 6 . Figure 4 for Figure 1 A top view of the fan blade structure of the fan device. Figure 5 for Figure 4 A cross-sectional view of the fan blade structure along section line 5-5 of the fan device. Figure 6 for Figure 4 A cross-sectional view of the fan blade structure along section line 6-6 of the fan device.

[0054] In detail, the first blade portion 321 and the second blade portion 322 are arranged along the axial direction of the hub 31, that is, the first blade portion 321 and the second blade portion 322 are in the form of a double-layer blade. The first blade portion 321 and the second blade portion 322 together surround an airflow space S. The airflow space S is used for airflow. In addition, the first blade portion 321 and the second blade portion 322 are, for example, arc-shaped.

[0055] Furthermore, the first blade portion 321 has a first outer surface 3211 and a first inner surface 3212 facing each other. The second blade portion 322 has a second outer surface 3221 and a second inner surface 3222 facing each other. The first outer surface 3211, the first inner surface 3212, the second outer surface 3221, and the second inner surface 3222 are, for example, curved surfaces, and the curvature of the first outer surface 3211 and the first inner surface 3212 is, for example, greater than the curvature of the second outer surface 3221 and the second inner surface 3222, that is, the curvature of the first blade portion 321 is, for example, greater than the curvature of the second blade portion 322. The first inner surface 3212 and the second inner surface 3222 are located in the airflow space S and face each other.

[0056] In this embodiment, the first blade portion 321 has a first side 3213, a second side 3214, a third side 3215, and a fourth side 3216. The first side 3213, the second side 3214, the third side 3215, and the fourth side 3216 surround the periphery of the first blade portion 321. The second blade portion 322 has a first side 3223, a second side 3224, a third side 3225, and a fourth side 3226. The first side 3223, the second side 3224, the third side 3225, and the fourth side 3226 surround the periphery of the second blade portion 322. The two first sides 3213 and 3223 are connected to the hub 31. The two first sides 3213 and 3223 are directly connected, and the two second sides 3214 and 3224 are directly connected.

[0057] The second and third sides 3215 and 3225 together surround an air inlet W1, and the second and fourth sides 3216 and 3226 together surround an air outlet W2. The air inlet W1 and the air outlet W2 are connected by an airflow space S, allowing airflow to enter the airflow space S from the air inlet W1 and then exit the airflow space S from the air outlet W2. The width of the air inlet W1 decreases, for example, from its middle section towards its opposite sides, and the width of the air outlet W2 decreases, for example, from its middle section towards its opposite sides.

[0058] In this embodiment, since each blade 32 is provided with a first blade portion 321 and a second blade portion 322, the number of blades is doubled compared to existing fan devices. The first blade portion 321 and the second blade portion 322 are arranged axially along the hub 31 and together surround the airflow space S, allowing the airflow generated by the fan device 10 to be directed towards the heat source through the airflow space S. Therefore, the maximum airflow of the fan device 10 can be increased, for example, from 75.93 cubic feet per minute (CFM) to 78.57 CFM, representing an increase of, for example, 3%. Furthermore, the maximum static pressure of the fan device 10 can be increased, for example, from 4.18 mmAq to 6.33 mmAq, representing an increase of, for example, 51%. In this way, the maximum airflow and maximum static pressure generated by the fan device 10 can be increased, thereby improving the performance of the fan device 10.

[0059] In this embodiment, the fan bracket 20 is in the form of a base, but it is not limited thereto. In other embodiments, the fan bracket may also be, for example, in the form of a ring frame.

[0060] In this embodiment, the two first sides 3213 and 3223 are directly connected, and the two second sides 3214 and 3224 are directly connected, but this is not a limitation. In other embodiments, only the two first sides or only the two second sides may be directly connected.

[0061] Please refer to it again. Figure 5 In this embodiment, when the fan device 10 is operating, the fan blade structure 30 generates airflow, and the airflow flows into the airflow space S from the air inlet W1 along direction A. Then, the airflow flows within the airflow space S along direction B. Next, the airflow flows along direction B and finally flows out of the airflow space S from the air outlet W2 along direction C, so as to blow the airflow towards the heat source.

[0062] According to the fan blade structure and fan device of the above embodiment, since each fan blade has a first blade portion and a second blade portion, the number of blades is increased by, for example, twice that of existing fan devices. The first and second blade portions are arranged axially along the hub and together surround the airflow space, allowing the airflow generated by the fan device to be blown towards the heat source through the airflow space. Therefore, the maximum airflow of the fan device can be increased, for example, from 75.93 cubic feet per minute to 78.57 cubic feet per minute, i.e., the maximum airflow can be increased by, for example, 3%. The maximum static pressure of the fan device can be increased, for example, from 4.18 mmHg to 6.33 mmHg, i.e., the maximum static pressure can be increased by, for example, 51%. In this way, the maximum airflow and maximum static pressure generated by the fan device can be increased, thereby improving the performance of the fan device.

[0063] Although the present invention has been disclosed above with reference to the foregoing embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be determined by the scope of protection of the appended claims.

Claims

1. A fan blade structure, characterized in that, For mounting on a fan bracket, the fan blade structure includes: A hub for rotatably mounting on the fan bracket; and Multiple fan blades, each of which includes a first blade portion and a second blade portion, one side of the first blade portion and the second blade portion being connected to the hub, and the first blade portion and the second blade portion being arranged along the axial direction of the hub.

2. The fan blade structure as described in claim 1, characterized in that, The first blade portion and the second blade portion each have a first side and a second side facing each other, the two first sides are connected to the hub, and the two first sides are directly connected.

3. The fan blade structure as described in claim 2, characterized in that, The two sides are directly connected.

4. The fan blade structure as described in claim 2, characterized in that, The first blade portion and the second blade portion each have a third side and a fourth side, the two third sides together surround an air inlet, and the two fourth sides together surround an air outlet, the air inlet and the air outlet are used to allow airflow generated by the fan blades to pass through.

5. The fan blade structure as described in claim 4, characterized in that, The width of the air inlet decreases from the middle section of the air inlet towards the opposite sides of the air inlet, and the width of the air outlet decreases from the middle section of the air outlet towards the opposite sides of the air outlet.

6. The fan blade structure as described in claim 1, characterized in that, The first blade portion and the second blade portion are arc-shaped, and the arc of the first blade portion is greater than the arc of the second blade portion.

7. A fan blade structure, characterized in that, For mounting on a fan bracket, the fan blade structure includes: A hub for rotatably mounting on the fan bracket; and Multiple fan blades are used to generate an airflow, and each of the fan blades includes a first blade portion and a second blade portion. One side of the first blade portion and the second blade portion are connected to the hub, and the first blade portion and the second blade portion together surround an airflow space for the airflow to pass through.

8. The fan blade structure as described in claim 7, characterized in that, The first blade portion has a first outer side and a first inner side facing each other, and the second blade portion has a second outer side and a second inner side facing each other. The first inner side and the second inner side are located in the airflow space and face each other.

9. The fan blade structure as described in claim 8, characterized in that, The first outer surface, the first inner surface, the second outer surface, and the second inner surface are all curved, and the curvature of the first outer surface and the first inner surface is greater than that of the second outer surface and the second inner surface.

10. The fan blade structure as described in claim 7, characterized in that, The first blade portion and the second blade portion each have a first side and a second side facing each other, the two first sides are connected to the hub, and the two first sides are directly connected.

11. The fan blade structure as described in claim 10, characterized in that, The first blade portion and the second blade portion each have a third side and a fourth side, the two third sides together surround an air inlet, the two fourth sides together surround an air outlet, and the air inlet and the air outlet are connected through the airflow space.

12. The fan blade structure as described in claim 11, characterized in that, The width of the air inlet decreases from the middle section of the air inlet towards the opposite sides of the air inlet, and the width of the air outlet decreases from the middle section of the air outlet towards the opposite sides of the air outlet.

13. A fan device, characterized in that, Include: A fan bracket; and A fan blade structure includes a hub and a plurality of fan blades. The hub is rotatably mounted on the fan bracket. Each of the fan blades includes a first blade portion and a second blade portion. One side of the first blade portion and the second blade portion is connected to the hub, and the first blade portion and the second blade portion are arranged along the axial direction of the hub.