Efficient cooling fan structure

Abstract

The utility model relates to the technical field of heat dissipation fans, and discloses an efficient heat dissipation fan structure which comprises a hub assembly, a fan blade assembly, a flow guide cover assembly and a driving assembly, the fan blade assembly comprises a plurality of blades, the front edges of the blades are in streamline design, and sawtooth-shaped tooth grooves are formed in the rear edges of the blades. Through cooperation of the hub assembly, the fan blade assembly and the flow guide cover assembly, the fan structure of the efficient heat dissipation fan forms an organic whole, all the parts supplement one another, the respective advantages of optimizing airflow, reducing resistance, reasonably guiding flow and the like are brought into full play, and the heat dissipation effect is improved by jointly exerting force from multiple angles.

Description

Technical Field

[0001] This application relates to the field of cooling fan technology, and in particular to the structure of a high-efficiency cooling fan. Background Technology

[0002] Many electronic and industrial devices generate a significant amount of heat during operation. If this heat cannot be dissipated effectively and promptly, it will affect the equipment's performance, stability, and even shorten its lifespan. Cooling fans, as a commonly used heat dissipation method, rely heavily on the rationality of their fan structure for their cooling efficiency.

[0003] Existing cooling fans have many shortcomings. For example, the shape design of the fan blades is not scientific enough, resulting in limited air volume and low airflow efficiency during rotation. The connection structure between the hub and the fan blades of some fans is not conducive to smooth airflow, increasing airflow resistance. Some fans have not fully considered aerodynamic principles in their overall structure, making it difficult to meet the growing demand for high-heat-dissipation scenarios. Therefore, a high-efficiency cooling fan structure is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency cooling fan structure to solve the problem of low cooling efficiency of existing cooling fans.

[0005] The high-efficiency cooling fan structure provided in this application adopts the following technical solution:

[0006] A high-efficiency cooling fan structure includes a hub assembly, a blade assembly, a shroud assembly, and a drive assembly. The hub assembly includes a central hub, which is a disc-shaped structure with a mounting base at its center. The inner wall of the mounting base has a mounting hole for connecting to a motor shaft, and the inner wall of the mounting hole has a keyway. Multiple reinforcing ribs are evenly distributed along the circumferential direction on the outer circumferential surface of the central hub, and the reinforcing ribs extend from the front to the back of the central hub.

[0007] The fan blade assembly includes multiple blades, the blades are generally arc-shaped and twisted, the root of the blades is connected to the outer circumferential surface of the central hub, the leading edge of the blades is streamlined, and the trailing edge of the fan blades is provided with serrated grooves.

[0008] The air guide assembly includes an annular air guide and a fixing plate. The fixing plate is fixedly connected to the outer walls of both ends of the annular air guide. The annular air guide surrounds the outside of the fan blade assembly. Its inner surface near the blade is a gradually expanding curved shape, gradually expanding outward from near the root of the blade towards the tip of the fan blade.

[0009] The drive assembly is installed on the inner wall of the fairing assembly and includes a servo motor. Multiple mounting brackets are fixedly connected to the outer wall of the servo motor. The multiple mounting brackets are welded to the inner wall of the annular fairing. The output shaft of the servo motor is engaged with the mounting base through a mounting hole.

[0010] Preferably, the inner wall of the mounting hole is symmetrically provided with keyways, and the outer wall of the output shaft of the servo motor is fixedly connected with a positioning rod, which is adapted to and engaged with the keyways.

[0011] Preferably, the outer walls of the two fixing plates are provided with a plurality of fixing holes, which are evenly distributed at the four corner edges of the two fixing plates.

[0012] Preferably, a protective net is fixedly connected to the inner wall of one of the fixing plates. The protective net is located directly in front of the fan blade assembly. The protective net is woven from interlaced metal wires and its surface is treated with rust prevention.

[0013] Preferably, a plurality of reinforcing ribs are fixedly connected between the outer wall of the mounting base and the inner wall of the wheel hub assembly, and the plurality of reinforcing ribs are evenly distributed in a circumferential array at equal intervals.

[0014] Preferably, the number of reinforcing ribs is 7, and their cross-sectional shape is trapezoidal.

[0015] Preferably, the number of blades is 7, and multiple blades and multiple reinforcing ribs are arranged alternately.

[0016] In summary, this application includes the following beneficial technical effects:

[0017] 1. The streamlined design of the fan blade assembly effectively reduces air cutting resistance, allowing air to enter the blade's effective area more smoothly and avoiding airflow turbulence and energy loss caused by an unreasonable leading edge shape. The serrated grooved perforation structure on the trailing edge creates small-scale vortices in the airflow passing over the blades during fan operation. These vortices not only further agitate the airflow and accelerate the heat exchange rate between the air and the surrounding environment, but also help propel the airflow further, optimizing airflow delivery efficiency and ensuring a wider and more uniform heat dissipation range.

[0018] 2. In the hub assembly, multiple reinforcing ribs are evenly distributed along the circumferential direction on the outer circumferential surface of the central hub. These reinforcing ribs extend from the front to the back. On the one hand, they enhance the overall structural strength of the hub, ensuring the stability of the fan during high-speed rotation; on the other hand, they guide airflow along the surface of the ribs, acting as a kind of air guide, making the airflow smoother when passing through the connection area between the hub and the fan blades. This avoids the airflow obstruction and turbulence caused by structural problems in some existing fans at this point, significantly reducing airflow resistance.

[0019] 3. The annular shroud in the fairing assembly features an inner surface with a gradually expanding curved shape on the side near the blades, extending outwards from near the blade root towards the blade tip. This unique curved shape is meticulously crafted based on aerodynamic principles. After the fan blades accelerate and propel the airflow, it precisely guides the airflow in a preset, efficient direction, effectively preventing backflow or disordered diffusion of the airflow after it exits the fan blade area. This results in a more uniform cooling airflow with a wider coverage area. Attached Figure Description

[0020] Figure 1 This is an overall schematic diagram of an embodiment of the application;

[0021] Figure 2 This is an internal schematic diagram of an embodiment of the application;

[0022] Figure 3 This is a schematic diagram of the structure of the driving component in the application embodiment;

[0023] Figure 4 This is a schematic diagram of the fan blade assembly in the embodiment of the application;

[0024] Figure 5 This is a side sectional view of an embodiment of the application.

[0025] Explanation of reference numerals in the attached drawings: 1. Hub assembly; 11. Center hub; 12. Mounting base; 13. Mounting hole; 14. Reinforcing rib; 15. Reinforcing rib; 16. Keyway; 2. Fan blade assembly; 21. Blade; 22. Tooth groove; 3. Shielding assembly; 31. Annular shield; 32. Fixing hole; 33. Fixing plate; 4. Protective net; 5. Drive assembly; 51. Servo motor; 52. Fixing bracket; 53. Positioning rod. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0027] This application discloses a high-efficiency heat dissipation fan structure. (Refer to...) Figure 1-5The high-efficiency heat dissipation fan structure includes a hub assembly 1, a fan blade assembly 2, a shroud assembly 3, and a drive assembly 5. The hub assembly 1 includes a central hub 11, which is a disc-shaped structure with a mounting base 12 at its center. The inner wall of the mounting base 12 has a mounting hole 13 for connecting with the motor shaft. The inner wall of the mounting hole 13 has a keyway 16. Multiple reinforcing ribs 15 are evenly distributed along the circumferential direction on the outer circumferential surface of the central hub 11. The reinforcing ribs 15 extend from the front to the back of the central hub 11.

[0028] The fan blade assembly 2 includes multiple blades 21. The blades 21 are generally arc-shaped and twisted. The root of the blades 21 is connected to the outer circumferential surface of the central hub 11. The leading edge of the blades 21 has a streamlined design, and the trailing edge of the fan blades is provided with serrated grooves 22, thereby forming a turbulence structure. When the fan blade assembly 2 rotates, the turbulence structure can make the airflow after passing through the blades 21 form a small-scale vortex, which accelerates the heat exchange efficiency between the air and the surrounding environment.

[0029] The fairing assembly 3 includes an annular fairing 31 and a fixing plate 33. The fixing plate 33 is fixedly connected to the outer walls of both ends of the annular fairing 31. The annular fairing 31 surrounds the outer side of the fan blade assembly 2. Its inner surface near the blade 21 is a gradually expanding curved surface shape, gradually expanding outward from the position near the root of the blade 21 towards the tip of the fan blade.

[0030] The drive assembly 5 is installed on the inner wall of the fairing assembly 3. It includes a servo motor 51. Multiple fixing brackets 52 are fixedly connected to the outer wall of the servo motor 51. The multiple fixing brackets 52 are welded to the inner wall of the annular fairing 31. The output shaft of the servo motor 51 is engaged with the mounting base 12 through the mounting hole 13.

[0031] The inner wall of the mounting hole 13 is symmetrically provided with keyways 16, and the outer wall of the output shaft of the servo motor 51 is fixedly connected with a positioning rod 53, which is adapted to and snapped into the keyway 16.

[0032] Multiple fixing holes 32 are provided on the outer walls of the two fixing plates 33, and the multiple fixing holes 32 are evenly distributed at the four corner edges of the two fixing plates 33.

[0033] A protective net 4 is fixedly connected to the inner wall of one of the fixing plates 33. The protective net 4 is located directly in front of the fan blade assembly 2. The protective net 4 is woven from intersecting metal wires and its surface is treated with rust prevention.

[0034] Multiple reinforcing ribs 14 are fixedly connected between the outer wall of the mounting base 12 and the inner wall of the hub assembly 1. The multiple reinforcing ribs 14 are evenly distributed in a circumferential array at equal intervals, and the multiple reinforcing ribs 14 can enhance the overall structural strength of the central hub 11.

[0035] There are 7 reinforcing ribs 15, and their cross-sectional shape is trapezoidal. The reinforcing ribs 15 enhance the overall structural strength of the central hub 11 on the one hand, and guide the airflow along its surface on the other hand, reducing the generation of turbulence.

[0036] There are 7 blades 21. Multiple blades 21 and multiple reinforcing ribs 15 are arranged in an alternating manner. The arc twist angle of the blades 21 gradually increases from the root to the tip within the range of 20°-40°, making the air-pushing effect of the blades 21 at different radius positions more reasonable. This can effectively improve wind pressure and air volume, enhance air transport capacity, and thus improve heat dissipation efficiency.

[0037] The implementation principle of the high-efficiency cooling fan structure in this application embodiment is as follows: First, the output shaft of the servo motor 51 is inserted into the mounting hole 13 in the mounting base 12, and a reliable connection is achieved through the positioning rod 53 and the keyway 16, ensuring that the servo motor 51 can drive the hub assembly 1 to rotate stably. Then, the roots of multiple blades 21 are welded to the outer circumference of the central hub 11 according to the requirement of uniform distribution, ensuring that the fan blades are firmly installed and the angle is accurate. Next, the annular guide shroud 31 is installed at the corresponding air outlet of the heat dissipation equipment through multiple fixing holes 32 on two fixing plates 33 using screws and other connecting parts, so that the guide shroud assembly 3 surrounds the outside of the fan blade assembly 2, and ensures that there is a suitable gap between them to allow the airflow to pass smoothly. Finally, the protective net 4 is installed on the inner wall of the fixing plate 33 and fixed by means of buckles or welding, etc., to complete the assembly of the entire high-efficiency cooling fan structure.

[0038] When the servo motor 51 starts and drives the central hub 11 to rotate, the central hub 11 drives the fan blade assembly 2 to rotate synchronously. During the rotation of the multiple blades 21, due to the streamlined design of their leading edges, air can be smoothly drawn into the working area of ​​the blades 21. With the arc-shaped twisting shape and the gradually changing twisting angle of the blades 21, the air is accelerated and pushed in a certain direction. After flowing through the blades 21, the turbulence structure formed by the serrated grooves 22 on the trailing edge causes the airflow to generate vortices, further promoting heat exchange. Then, the airflow enters the annular guide shroud 31, and under the guidance of the gradually expanding curved surface of the annular guide shroud 31, it diffuses outward efficiently and orderly, finally blowing towards the equipment or area that needs heat dissipation, achieving the function of efficient heat dissipation.

[0039] In summary, through the coordinated cooperation between the hub assembly 1, the fan blade assembly 2, and the air guide assembly 3, the high-efficiency cooling fan structure of this utility model forms an organic whole. Each part complements the other, giving full play to their respective advantages in optimizing airflow, reducing resistance, and rationally guiding airflow, thus working together from multiple angles to improve the cooling effect.

[0040] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0041] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0042] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency heat dissipation fan structure, characterized in that: The assembly includes a hub assembly (1), a fan blade assembly (2), a fairing assembly (3), and a drive assembly (5). The hub assembly (1) includes a central hub (11), which is a disc-shaped structure with a mounting seat (12) at its center. The inner wall of the mounting seat (12) has a mounting hole (13) for connecting with the motor shaft. The inner wall of the mounting hole (13) has a keyway (16). Multiple reinforcing ribs (15) are evenly distributed along the circumferential direction on the outer circumferential surface of the central hub (11). The reinforcing ribs (15) extend from the front to the back of the central hub (11). The fan blade assembly (2) includes multiple blades (21). The blades (21) are generally arc-shaped and twisted. The root of the blades (21) is connected to the outer circumferential surface of the central hub (11). The leading edge of the blades (21) is streamlined and the trailing edge of the fan blades is provided with serrated grooves (22). The air guide assembly (3) includes an annular air guide (31) and a fixing plate (33). The fixing plate (33) is fixedly connected to the outer walls of both ends of the annular air guide (31). The annular air guide (31) surrounds the outside of the fan blade assembly (2). Its inner surface near the blade (21) is a gradually expanding curved shape, gradually expanding outward from the root of the blade (21) towards the tip of the fan blade. The drive assembly (5) is installed on the inner wall of the fairing assembly (3), and includes a servo motor (51). The outer wall of the servo motor (51) is fixedly connected to a plurality of fixing brackets (52). The plurality of fixing brackets (52) are welded to the inner wall of the annular fairing (31). The output shaft of the servo motor (51) is engaged with the mounting base (12) through the mounting hole (13).

2. The high-efficiency heat dissipation fan structure according to claim 1, characterized in that: The inner wall of the mounting hole (13) is symmetrically provided with keyways (16), and the outer wall of the output shaft of the servo motor (51) is fixedly connected with a positioning rod (53), which is adapted to and engaged with the keyway (16).

3. The high-efficiency heat dissipation fan structure according to claim 1, characterized in that: The outer walls of the two fixing plates (33) are provided with a plurality of fixing holes (32), which are evenly distributed at the four corner edges of the two fixing plates (33).

4. The high-efficiency heat dissipation fan structure according to claim 1, characterized in that: One of the fixing plates (33) has a protective net (4) fixedly connected to its inner wall. The protective net (4) is located in front of the fan blade assembly (2). The protective net (4) is woven from interlaced metal wires and its surface is treated with rust prevention.

5. The high-efficiency heat dissipation fan structure according to claim 1, characterized in that: Multiple reinforcing ribs (14) are fixedly connected between the outer wall of the mounting base (12) and the inner wall of the hub assembly (1), and the multiple reinforcing ribs (14) are evenly distributed in a circumferential array at equal intervals.

6. The high-efficiency heat dissipation fan structure according to claim 1, characterized in that: The number of the reinforcing ribs (15) is 7, and their cross-sectional shape is trapezoidal.

7. The high-efficiency heat dissipation fan structure according to claim 6, characterized in that: The number of blades (21) is 7, and multiple blades (21) are interleaved with multiple reinforcing ribs (15).

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