Fan blade and cooling fan

Abstract

The fan blade comprises a connecting piece and a plurality of fan blades arranged on the connecting piece, the connecting piece is of a circular or annular structure, the fan blades are evenly arranged in the circumferential direction of the connecting piece, a windward side is arranged at the end, away from the connecting piece, of each fan blade, and at least one groove is formed in each windward side. The utility model further provides a cooling fan. The cooling fan comprises the fan blade. According to the fan blade, the grooves are formed in the windward faces, away from the connecting pieces, of the fan blades, turbulence transition can be promoted through the grooves, boundary layer separation is not prone to occurring in turbulence, and therefore the flowing resistance can be reduced, and the effects of improving the air volume and reducing noise are achieved. The cooling fan provided by the utility model adopts the fan blades, so that the air outlet amount can be increased to obtain a better cooling effect, or the effect of reducing the rotating speed of the fan to reduce noise is achieved on the premise that the air outlet amount is not changed.

Description

Technical Field

[0001] The present application relates to the field of fan technology, and in particular to a heat dissipation fan used in a notebook computer, and a fan blade structure on the heat dissipation fan. Background Art

[0002] Chips are important components commonly used in the electronics industry. With the advancement of technology, the power of chips continues to increase and the area continues to decrease, resulting in a gradual increase in the heat flux density of the chips and a continuous increase in the temperature of the chips during operation. Since chips cannot operate in a high-temperature environment for a long time, the requirements for chip heat dissipation are getting higher and higher. The heat dissipation modules used to dissipate heat from chips in laptops mostly adopt a traditional heat pipe plus a cooling fan structure combination, that is, the heat of the chip passes through the copper plate and is transferred to the fins via the heat pipe, and is carried away by the wind blown out by the cooling fan. Existing cooling fans generally adopt a conventional design with multiple blades. By rotating, they generate a certain amount of air to blow through the fins, carry away the heat, and reduce the temperature of the chip. However, the existing fan blade structure has a large wind resistance and a small air volume when working. In order to achieve the required air volume, the rotation speed can only be increased, resulting in increased noise, which affects the user experience.

[0003] Therefore, it is necessary to develop a heat dissipation fan with large air volume and low noise. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a fan blade in response to the above-mentioned defects of the prior art, which can achieve the effect of increasing the air output and reducing noise by optimizing the shape of the fan blade.

[0005] The present application also provides a heat dissipation fan using the above-mentioned fan blades.

[0006] The technical solution adopted by this application to solve its technical problem is: constructing a fan blade, including a connecting part and a plurality of blades arranged on the connecting part, the connecting part is a circular or annular structure, the blades are evenly arranged along the circumference of the connecting part, and the end of the blade away from the connecting part is provided with a windward surface, and at least one groove is provided on the windward surface.

[0007] In some embodiments, the shape of the groove is at least one of circular, elliptical or polygonal.

[0008] In some embodiments, the groove is hexagonal in shape.

[0009] In some embodiments, the corners of the grooves are transitioned into arcs.

[0010] In some embodiments, the side length of the groove is 0.2-0.5 mm.

[0011] In some embodiments, the depth of the groove is 0.05-0.2 mm.

[0012] In some embodiments, there are three grooves, and the interval between adjacent grooves is 1-2 mm.

[0013] In some embodiments, the number of the fan blades is 75-85.

[0014] In some embodiments, the connector includes an inner ring and an outer ring.

[0015] In addition, the present application also provides a heat dissipation fan, including the above-mentioned fan blades.

[0016] The implementation of this application has at least the following beneficial effects: The fan blades of this application are provided with at least one groove on the windward surface of the blades away from the connecting member. The groove can promote turbulent transition, making turbulent flow less likely to experience boundary layer separation, thereby reducing flow resistance, achieving the effect of increasing air volume and reducing noise. The cooling fan provided by this application uses the above-mentioned fan blades. The fan blade structure is optimized. Compared with traditional cooling fans, the cooling fan of this application can achieve at least one of the following effects: First, the cooling fan of this application increases air volume and improves heat dissipation while maintaining constant fan speed and noise; Second, the cooling fan of this application reduces fan speed and reduces noise while maintaining constant air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 It is a structural diagram of existing fan blades;

[0019] Figure 2 is a schematic structural diagram of fan blades provided in some embodiments of the present application;

[0020] Figure 3 yes Figure 2 Enlarged schematic diagram of point A in the middle.

[0021] Description of Figure Numbers:

[0022] Figure 1 : Connecting piece 10, fan blade 20;

[0023] Figure 2 and Figure 3 : Connecting part 100, inner ring 110, outer ring 120, fan blade 200, windward surface 210, groove 220. DETAILED DESCRIPTION

[0024] In order to provide a clearer understanding of the technical features, objectives, and effects of the present application, the specific embodiments of the present application are now described in detail with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art may make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings or the orientation or position relationship in which the product of this application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0027] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0028] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0029] like Figure 1 As shown, Figure 1A schematic diagram of the structure of an existing fan blade is provided. The existing fan blade includes a connector 10 and a plurality of blades 20. The tail ends of the blades 20 have a smooth surface. When the fan blades are in operation, laminar flow is generated on each blade 20. Due to the smooth surface of the tail ends of the blades 20, laminar flow is not easily transformed into turbulent flow. Instead, laminar flow is prone to boundary layer separation, resulting in a larger wake area, increasing flow resistance, and thus reducing airflow. To achieve the required airflow, the fan blade speed can only be increased, but increasing the speed will increase noise, affecting the user experience.

[0030] like Figure 2 and Figure 3 As shown, Figure 2 、 Figure 3 The fan blades in some embodiments of the present application are shown, including a connector 100 and a plurality of blades 200 disposed on the connector 100. The connector 100 is a circular or annular structure, and the blades 200 are evenly arranged along the circumference of the connector 100. One end of the blade 200 is fixedly connected to the connector 100, and the other end of the blade 200 is away from the connector 100, and the connector 100 drives the blades 200 to rotate.

[0031] like Figure 2 and Figure 3 As shown, the end of the blade 200 away from the connector 100 is provided with a windward surface 210. The windward surface 210 is oriented in the same direction as the rotation of the fan blade and is provided with at least one groove 220. When the fan blade is in operation, the groove 220 on the end of the blade 200 away from the connector 100 can promote turbulent transition, making turbulent flow less likely to experience boundary layer separation, thereby reducing flow resistance, thereby increasing air volume and reducing noise.

[0032] In some embodiments of the present application, the shape of the groove 220 can be at least one of a circle, an ellipse or a polygon. Figure 3 As shown, the groove 220 can be hexagonal in shape, with the corners of the groove 220 all adopting arc transitions. The rounded hexagonal groove can more easily promote the occurrence of turbulent transition. Furthermore, the side length of the hexagonal groove 220 is generally between 0.2-0.5 mm, for example, the side length of the groove 220 can be set to 0.3 mm. The depth of the groove 220 is generally between 0.05-0.2 mm, for example, the depth of the groove 220 can be set to 0.1 mm.

[0033] In order to better promote the occurrence of turbulent transition, the number of grooves 220 on each fan blade 200 is preferably set to more than two, and the interval between adjacent grooves 220 is 1-2 mm. Figure 3 As shown, in some embodiments of the present application, three grooves 220 are provided, and the interval between adjacent grooves 220 is set to 1.3 mm.

[0034] Further, such as Figure 2 As shown, in some embodiments of the present application, the number of blades 200 is set between 75 and 85, preferably 79. In existing fan blades, the number of blades is generally 54, while the number of blades 200 in the present application is 1.46 times the number of blades in existing fans. By increasing the number of blades 200, the air volume can be increased.

[0035] Further, such as Figure 2 As shown, in some embodiments of the present application, the connecting member 100 includes an inner ring 110 and an outer ring 120, wherein the inner ring 110 serves to connect the fan blade 200 and drive the fan blade 200 to rotate, and the outer ring 120 is used to connect and reinforce the end of the fan blade 200 away from the connecting member 100, so that the structure of the entire fan blade is more stable and reliable.

[0036] In addition, the present application also provides a heat dissipation fan, which includes the fan blades provided in the embodiment of the present application. Since the structure of the fan blades is optimized, the heat dissipation fan of the present application can obtain at least one of the following effects compared with the traditional heat dissipation fan: First, the heat dissipation fan of the present application increases the air volume and has a better heat dissipation effect while maintaining the fan speed and noise unchanged; Second, the heat dissipation fan of the present application decreases the fan speed and reduces the noise while maintaining the air volume unchanged. For example, the heat dissipation fan of the present application adopts Figure 2 The fan blades provided can reduce the fan speed by 12% and the noise by 5 to 6dBA while maintaining the air volume, so as to achieve a better silent effect and meet the experience of notebook users.

[0037] The above embodiments only express the specific implementation methods of the present application. The descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present application, and several deformations and improvements can be made, which all fall within the scope of protection of the present application. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present application should fall within the scope of coverage of the claims of the present application.

Claims

1. A fan blade, characterized in that: The invention comprises a connecting member (100) and a plurality of fan blades (200) arranged on the connecting member (100), wherein the connecting member (100) is a circular or annular structure, the fan blades (200) are evenly arranged along the circumference of the connecting member (100), and a windward surface (210) is provided at one end of the fan blade (200) away from the connecting member (100), and at least one groove (220) is provided on the windward surface (210).

2. The fan blade according to claim 1, characterized in that: The shape of the groove (220) is at least one of circular, elliptical or polygonal.

3. The fan blade according to claim 2, characterized in that: The groove (220) is in the shape of a hexagon.

4. The fan blade according to claim 3, characterized in that: The corners of the groove (220) adopt arc transition.

5. The fan blade according to claim 3, characterized in that: The side length of the groove (220) is 0.2-0.5 mm.

6. The fan blade according to any one of claims 2 to 5, characterized in that: The depth of the groove (220) is 0.05-0.2 mm.

7. The fan blade according to claim 1, characterized in that: There are three grooves (220), and the interval between adjacent grooves (220) is 1-2 mm.

8. The fan blade according to claim 1, characterized in that: The number of the fan blades (200) is 75-85.

9. The fan blade according to claim 1, characterized in that: The connecting member (100) comprises an inner ring (110) and an outer ring (120).

10. A cooling fan, characterized in that: The fan blade comprises the fan blade according to any one of claims 1 to 9.

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