CPU air-cooling heat dissipation module with high air volume distribution uniformity

Abstract

The invention relates to the technical field of air-cooling heat dissipation in electronic device heat management, and particularly discloses a CPU air-cooling heat dissipation module with high air volume distribution uniformity. According to the technical scheme, the CPU air-cooling heat dissipation module is characterized by comprising an axial flow fan and a fin stacking structure matched with the axial flow fan; the fin stacking structure is formed by vertically stacking a plurality of fins at intervals, the axial flow fan is provided with a middle air-less area located at the position of a middle hub, and a first air-less area, a second air-less area, a third air-less area and a fourth air-less area which are located at the four corners, and the fin stacking structure is provided with an opening structure in an airflow upstream area. The projection area, in the fin stacking mechanism, of the opening structure corresponds to the small-air-volume air outlet area of the axial flow fan. The air quantity distribution uniformity is improved, meanwhile, the effective heat dissipation area of the fins is reserved to the maximum degree, and finally the effect of improving the overall heat transfer performance of the module is achieved.

Description

Technical Field

[0001] This application relates to the technical field of air cooling in the thermal management of electronic devices, and in particular to a CPU air cooling module with high airflow uniformity. Background Technology

[0002] In the consumer-grade CPU cooling market, air cooling has always held a dominant position. With the rapid development of electronic technology, CPU performance has continuously improved, resulting in increased heat generation. Efficient heat dissipation is crucial for ensuring stable CPU operation and extending its lifespan. Air cooling modules, with their advantages of low cost, relatively simple structure, and easy maintenance, are widely used in various computer devices. They provide reliable cooling solutions for many ordinary consumers, meeting diverse usage needs for daily office work and entertainment, and greatly promoting the popularization and development of the computer industry.

[0003] In traditional air-cooling technology, axial fans are typically installed upstream and downstream of the air-cooling module to drive airflow and remove heat. However, axial fans have inherent characteristics: their outer contour is circular, and a motor needs to be installed at the hub, resulting in a ring-shaped airflow pattern. Meanwhile, the overall shape of the fin stack in the air-cooling module is square, and momentum exchange between the straight fins is impossible. To address the airflow uniformity issue, attempts were made to use uniformly perforated fins to promote momentum exchange between different fins.

[0004] However, existing air-cooling technologies have significant drawbacks. Due to the mismatch between the fan exhaust shape and the fin stacking shape of the air-cooling module, and the ineffective airflow exchange between the fins, the airflow exhaust from the fan exhibits poor uniformity throughout the entire cooling module. This poor airflow uniformity results in the fin area in areas with lower airflow not being effectively utilized, thus reducing overall heat dissipation performance. While using uniformly perforated fins can promote airflow exchange to some extent, it significantly reduces the total heat transfer area of ​​the fins. The negative impact often outweighs the positive effects of improving airflow uniformity, failing to significantly improve the overall heat dissipation performance of the radiator. Summary of the Invention

[0005] In order to improve the uniformity of airflow distribution while maximizing the effective heat dissipation area of ​​the fins, and ultimately improve the overall heat transfer performance of the module, this application provides a CPU air-cooled heat dissipation module with high airflow distribution uniformity.

[0006] This application provides a CPU air-cooling module with high airflow uniformity, which adopts the following technical solution: A CPU air-cooling module with high airflow uniformity includes an axial fan and a fin stack structure that cooperates with the axial fan. The fin stack structure is composed of multiple fins stacked vertically at intervals. The axial fan has a central low-airflow zone located at the central hub position and a first low-airflow zone, a second low-airflow zone, a third low-airflow zone, and a fourth low-airflow zone located at the four corners. The fin stack structure has an opening structure in the upstream region of the airflow. The projection area of ​​the opening structure on the fin stack structure corresponds to the low-airflow zone of the axial fan.

[0007] By adopting the above technical solution, the projection area of ​​the opening structure in the fin stacking mechanism corresponds to the low airflow area of ​​the axial fan. While retaining the effective heat dissipation area of ​​the fins, the opening structure can guide the airflow, allowing the airflow to flow better to the central low-airflow area, the first low-airflow area, the second low-airflow area, the third low-airflow area, and the fourth low-airflow area. This improves the uniformity of airflow in the entire heat dissipation module and avoids the situation where some fin areas cannot be effectively utilized due to uneven airflow, thereby improving heat dissipation performance.

[0008] Preferably, the fin stacking structure includes a first fin group, a second fin group, a third fin group, and a fourth fin group from top to bottom. The opening structure on the first fin group is located in the left side region of the fin, the opening structures of the second fin group and the third fin group are located in the middle region of the fin, and the opening structure of the fourth fin group is located in the right side region of the fin.

[0009] By adopting the above technical solution, the airflow at the outlet of the axial fan has a circumferential rotational speed, and this speed gradually increases along the radial direction. According to the airflow characteristics, the opening structure of the first fin group is located in the left region of the fin, which allows the airflow with a vertical upward circumferential speed to flow into the first low-wind zone through this opening structure for direct airflow compensation. The airflow flowing into the first low-wind zone then flows into the second low-wind zone through the gaps between the fins for indirect airflow compensation. The opening structures of the second and third fin groups are located in the middle region of the fin, so that the middle low-wind zone with a lower airflow velocity in the middle hub region of the axial fan receives momentum compensation from the nearby air with a higher airflow velocity. The opening structure of the fourth fin group is located in the right region of the fin, which allows the airflow with a vertical downward circumferential speed to flow into the third low-wind zone through this opening structure for direct airflow compensation. The airflow flowing into the third low-wind zone then flows into the fourth low-wind zone through the gaps between the fins for indirect airflow compensation, thereby improving the uniformity of airflow.

[0010] Preferably, the opening structure of the first fin group forms an airflow guiding channel to the first low-wind zone in the vertical upward direction of the fin, and the opening structure of the fourth fin group forms an airflow guiding channel to the third low-wind zone in the vertical downward direction of the fin.

[0011] By adopting the above technical solution, the opening structures in the first fin group and the fourth fin group form an airflow guiding channel. After a larger volume of airflow enters the opening structure, it flows along a preset direction, thereby supplementing the airflow in the smaller volume area.

[0012] Preferably, the opening structures of the second fin group and the third fin group form momentum compensation channels flowing toward the central low-wind zone in the radial extension direction of the fins.

[0013] By adopting the above technical solution, momentum exchange is carried out between the central low-wind zone and the surrounding high-velocity air in the momentum compensation channel, so that the central low-wind zone can obtain a greater flow velocity, which is conducive to improving the overall air volume uniformity.

[0014] Preferably, the opening structure is configured as a hole-like structure extending through the thickness direction of the fin or a groove structure extending along the surface of the fin.

[0015] By adopting the above technical solutions, both the perforated structure and the grooved structure of the open structure can realize the flow of air, allowing the large air volume to flow to the small air volume, which is conducive to improving the uniformity of air volume.

[0016] Preferably, the perforated structure is distributed in an array, and the groove structure is extended continuously or intermittently.

[0017] By adopting the above technical solutions, the array-shaped distribution of the perforated structure is conducive to uniformly guiding the airflow, making it flow more effectively to the low air volume area. The continuous groove structure can form a continuous airflow channel to make the airflow flow more smoothly, while the intermittent groove structure can guide the airflow at different positions, thereby increasing the dispersion of the airflow.

[0018] Preferably, the outermost two rows of fins in the fin stack structure do not have openings, and the openings are only distributed in the internal area of ​​the fin stack structure.

[0019] By adopting the above technical solution, the outermost fins are more likely to come into contact with the outside air and have better ventilation. If an opening structure is set, it may damage the overall structure of the fins and thus affect the heat dissipation effect. The fins in the inner area have poor ventilation due to being blocked by the surrounding fins. Setting an opening structure in the inner area can more effectively improve the air volume distribution.

[0020] Preferably, the opening direction of the opening structure is consistent with the circumferential airflow velocity direction generated by the axial fan.

[0021] By adopting the above technical solution, this setting can reduce the resistance of airflow when entering the opening structure, allowing the airflow to flow more smoothly through the opening structure to the low air volume area.

[0022] Preferably, the opening structures of the first fin group and the fourth fin group are symmetrically distributed, and the opening structures of the second fin group and the third fin group are symmetrically arranged.

[0023] By adopting the above technical solution, this setting can ensure that the airflow adjustment of the entire heat dissipation module is more balanced on the left and right sides and in the middle area, thereby further improving the uniformity of airflow.

[0024] Preferably, the total area of ​​the opening structure accounts for less than 15% of the total area of ​​the fin.

[0025] By adopting the above technical solutions, while improving the uniformity of airflow, the impact on the total heat transfer area of ​​the fins can be reduced, which is conducive to improving the overall heat transfer performance of the heat dissipation module.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting an opening structure in the upstream region of the airflow of the fin stack structure, and the projection area of ​​the opening structure of the fin stack mechanism corresponds to the low airflow area of ​​the axial fan, the airflow can be guided by the opening structure while retaining the effective heat dissipation area of ​​the fins. This allows the airflow to flow better to the central low-wind zone, the first low-wind zone, the second low-wind zone, the third low-wind zone, and the fourth low-wind zone, thereby improving the uniformity of airflow in the entire heat dissipation module and avoiding the situation where some fin areas cannot be effectively utilized due to uneven airflow, thus improving heat dissipation performance.

[0027] 2. By placing the opening structure on the first fin group in the left region of the fin, the airflow with vertical upward circumferential velocity can flow into the first low-wind zone through this opening structure for direct airflow compensation. The airflow flowing into the first low-wind zone then flows into the second low-wind zone through the gaps between the fins for indirect airflow compensation. Placing the opening structures of the second and third fin groups in the middle region of the fins allows the central low-wind zone with lower airflow velocity in the middle hub region of the axial fan to receive momentum compensation from the nearby higher-velocity air. Placing the opening structure of the fourth fin group in the right region of the fins allows the airflow with vertical downward circumferential velocity to flow into the third low-wind zone through this opening structure for direct airflow compensation. The airflow flowing into the third low-wind zone then flows into the fourth low-wind zone through the gaps between the fins for indirect airflow compensation, thereby improving the uniformity of airflow.

[0028] 3. By setting the opening structure as a perforated structure that runs through the thickness direction of the fin or a groove structure that extends along the surface of the fin, the perforated or groove structure of the opening structure can realize the flow of air, allowing large air volume to flow to small air volume, which is beneficial to improving the uniformity of air volume. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the airflow characteristics at the outlet of the axial fan and the air volume distribution of the module in an embodiment of this application.

[0030] Figure 2 This is a schematic diagram of local airflow and momentum compensation of the air-cooled heat dissipation module in an embodiment of this application.

[0031] Figure 3 This is a schematic diagram showing the position of the opening structure on the first fin group in an embodiment of this application.

[0032] Figure 4 This is a schematic diagram showing the position of the opening structure on the second and third fin groups in the embodiments of this application.

[0033] Figure 5 This is a schematic diagram showing the position of the opening structure on the fourth fin group in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures: 1. Axial fan; 2. Central low-wind zone; 3. First low-wind zone; 4. Second low-wind zone; 5. Third low-wind zone; 6. Fourth low-wind zone; 7. Open structure; 8. First fin group; 9. Second fin group; 10. Third fin group; 11. Fourth fin group. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0036] This application discloses a CPU air-cooling module with high airflow uniformity, referring to... Figure 1 and Figure 2 It includes an axial fan 1 and a fin stacking structure that cooperates with the axial fan 1. The fin stacking structure is composed of multiple fins stacked vertically at intervals. The axial fan 1 has a central low-wind zone 2 located at the middle hub position and a first low-wind zone 3, a second low-wind zone 4, a third low-wind zone 5, and a fourth low-wind zone 6 located at the four corners. (Refer to...) Figure 3 , Figure 4 and Figure 5 The fin stack structure has an opening structure 7 in the upstream region of the airflow. The projection area of ​​the opening structure 7 on the fin stack structure corresponds to the low airflow area of ​​the axial fan 1. In this way, the opening structure 7 can guide the airflow, allowing the airflow to flow better to the low airflow areas 2, 3, 4, 5, and 6 in the middle, thereby improving the uniformity of airflow in the entire heat dissipation module and avoiding the situation where some fin areas cannot be effectively utilized due to uneven airflow, thus improving heat dissipation performance.

[0037] Reference Figure 1 and Figure 2 The finned stack structure is composed of neatly stacked fins, typically made of metal such as aluminum alloy or copper, which have good thermal conductivity. During assembly, the fins are parallel to each other and maintain a certain distance to allow airflow to pass through smoothly. The fins can be rectangular with a smooth, flat surface, which facilitates heat conduction and dissipation. Of course, the shape of the fins can also be adjusted according to actual needs, such as trapezoidal. The axial fan mainly consists of fan blades, a motor, and a housing. The fan blades are generally made of plastic, which is lightweight and has good strength. The motor can be a DC brushless motor, which is stable in operation and has low energy consumption. The fan blades are mounted on the motor shaft; when the motor is powered on, it drives the fan blades to rotate, thereby generating airflow. The housing protects the fan blades and motor, and also guides the airflow.

[0038] The design of the opening structure 7 is crucial in this embodiment. The location of the opening structure 7 is determined based on the airflow characteristics of the axial fan 1, ensuring that its projected area corresponds to the low-airflow area. Specifically, the opening structure 7 can be a perforated structure or a grooved structure. If it is a perforated structure, it can be various shapes such as circular or square, distributed in an array in the opening area and extending through the fin thickness direction. This array distribution can uniformly guide the airflow, making it flow more effectively to the low-airflow area. For example, the diameter of the circular holes can be adjusted according to actual conditions, ensuring sufficient airflow while minimizing the impact on the fin heat transfer area. If it is a grooved structure, the groove extends along the surface of the fin, and it can extend continuously or intermittently in the opening area. Continuous grooves can form a continuous airflow channel, allowing the airflow to flow more smoothly; intermittent grooves can guide the airflow at different positions, increasing the dispersion of the airflow.

[0039] Reference Figure 2 The fin stacking structure includes, from top to bottom, a first fin group 8, a second fin group 9, a third fin group 10, and a fourth fin group 11, and then refers to... Figure 3 , Figure 4 and Figure 5The opening structure 7 on the first fin group 8 is located in the left region of the fins, the opening structure 7 on the second fin group 9 and the third fin group 10 is located in the middle region of the fins, and the opening structure 7 on the fourth fin group 11 is located in the right region of the fins. This grouping arrangement is based on the airflow characteristics of the axial fan 1. The airflow at the outlet of the axial fan 1 has a circumferential rotational speed, and this speed gradually increases along the radial direction. At the same time, according to the airflow characteristics, the first low-airflow zone 3, the second low-airflow zone 4, the third low-airflow zone 5, the fourth low-airflow zone 6, and the middle low-airflow zone 2 facing the fan hub in the four right-angled areas of the heat dissipation module are low-airflow areas. The first fin group 8 has an opening on the left side, allowing airflow with a vertical upward circumferential velocity to flow into the first low-wind zone 3 through the opening for direct airflow compensation. The airflow into the first low-wind zone 3 then flows into the second low-wind zone 4 through the gaps between the fins for indirect airflow compensation. The second fin group 9 and the third fin group 10 have openings in the middle, allowing the central low-wind zone 2, where the flow velocity in the central hub region is very low, to receive partial momentum compensation from the nearby air with a higher flow velocity. The fourth fin group 11 has an opening on the right side, allowing airflow with a vertical downward circumferential velocity to flow into the third low-wind zone 5 through the opening for direct airflow compensation. The airflow into the third low-wind zone 5 then flows into the fourth low-wind zone 6 through the gaps between the fins for indirect airflow compensation, thereby improving the uniformity of airflow.

[0040] Reference Figure 1 , Figure 2 and Figure 3 The opening structure 7 of the first fin group 8 forms an airflow guiding channel towards the first low-wind zone 3 in the vertically upward direction of the fins, and the opening structure 7 of the fourth fin group 11 forms an airflow guiding channel towards the third low-wind zone 5 in the vertically downward direction of the fins. The formation of this airflow guiding channel utilizes the specific position and shape of the opening structure 7. For example, the size and tilt angle of the opening affect the direction and speed of the airflow. When the airflow enters the opening structure 7, it flows along a predetermined direction, thereby supplementing the airflow in the low-wind-volume area. (Refer to...) Figure 4 and Figure 5 The opening structure 7 of the second fin group 9 and the third fin group 10 forms a momentum compensation channel in the radial extension direction of the fins, leading to the central low-wind zone 2. In this channel, the air with low velocity in the central hub region exchanges momentum with the surrounding air with high velocity, allowing the air in the central region to obtain a higher velocity and improving the airflow uniformity of the entire region.

[0041] It should be noted that the outermost two rows of fins in the fin stack structure do not have opening structures 7; the opening structures 7 are only distributed in the internal area of ​​the fin stack structure. This is because the outermost fins are more exposed to outside air and have relatively better ventilation. Adding opening structures 7 to these areas might actually disrupt the overall fin structure and affect heat dissipation. Meanwhile, the fins in the internal area have poorer ventilation due to being blocked by the surrounding fins. Therefore, adding opening structures 7 to these areas can more effectively improve airflow distribution.

[0042] It is worth mentioning that the opening direction of the opening structure 7 is consistent with the circumferential airflow velocity direction generated by the axial fan 1. This reduces the resistance of the airflow when entering the opening structure 7, allowing the airflow to flow more smoothly through the opening structure 7 to the low-airflow area. For example, if the circumferential airflow generated by the axial fan 1 is clockwise, then the opening direction of the opening structure 7 should also be clockwise. At the same time, the opening structures 7 of the first fin group 8 and the fourth fin group 11 are symmetrically distributed, and the opening structures 7 of the second fin group 9 and the third fin group 10 are symmetrically arranged. This symmetrical distribution ensures a more balanced airflow regulation on the left and right sides and in the middle area of ​​the entire heat dissipation module, further improving the uniformity of airflow.

[0043] Reference Figure 3 , Figure 4 and Figure 5 The total area of ​​the opening structure 7 accounts for less than 15% of the total area of ​​the fins. This is to improve airflow uniformity while minimizing the impact on the total heat transfer area of ​​the fins. Because the opening structure 7 reduces the heat transfer area of ​​the fins, if the opening area is too large, it may lead to a decrease in heat dissipation performance. By controlling the area ratio of the opening structure 7, a balance can be found between the two, thereby improving the overall heat transfer performance of the module.

[0044] The implementation principle of a CPU air-cooling module with high airflow uniformity in this embodiment is as follows: This embodiment divides the fins into a first fin group 8, a second fin group 9, a third fin group 10, and a fourth fin group 11, and sets opening structures 7 in specific areas, cleverly combining the airflow characteristics of the axial fan 1. Based on the low airflow areas of the fan exhaust, the airflow is specifically guided to these areas, improving the uniformity of airflow. Simultaneously, the area and distribution of the opening structures 7 are rationally controlled to maximize the effective heat dissipation area of ​​the fins while ensuring airflow uniformity. Compared with traditional air-cooling modules, this effectively solves the problems of uneven airflow and significant reduction in heat transfer area due to openings, significantly improving the overall heat transfer performance of the module, ensuring stable CPU operation in a highly efficient cooling environment, and demonstrating strong practicality and innovation.

[0045] 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 CPU air-cooled heat dissipation module with high airflow uniformity, characterized in that: The device includes an axial fan (1) and a fin stacking structure that works in conjunction with the axial fan (1). The fin stacking structure is composed of multiple fins stacked at intervals. The axial fan (1) has a central low-wind zone (2) located at the central hub position and a first low-wind zone (3), a second low-wind zone (4), a third low-wind zone (5), and a fourth low-wind zone (6) located at the four corners. The fin stacking structure has an opening structure (7) in the upstream region of the airflow. The opening structure (7) is distributed in a corresponding manner in the projection area of ​​the fin stacking structure and the low-airflow area of ​​the axial fan (1).

2. The CPU air-cooling module with high airflow uniformity according to claim 1, characterized in that: The fin stack structure includes a first fin group (8), a second fin group (9), a third fin group (10), and a fourth fin group (11) from top to bottom. The opening structure (7) on the first fin group (8) is located in the left side region of the fin, the opening structure (7) of the second fin group (9) and the third fin group (10) is located in the middle region of the fin, and the opening structure (7) of the fourth fin group (11) is located in the right side region of the fin.

3. A CPU air-cooling module with high airflow uniformity according to claim 2, characterized in that: The opening structure (7) of the first fin group (8) forms an airflow guiding channel to the first low-wind zone (3) in the vertical upward direction of the fin, and the opening structure (7) of the fourth fin group (11) forms an airflow guiding channel to the third low-wind zone (5) in the vertical downward direction of the fin.

4. A CPU air-cooling module with high airflow uniformity according to claim 2, characterized in that: The opening structure (7) of the second fin group (9) and the third fin group (10) forms a momentum compensation channel flowing toward the central low-wind zone (2) in the radial extension direction of the fins.

5. A CPU air-cooling module with high airflow uniformity according to claim 1, characterized in that: The opening structure (7) is configured as a hole-like structure that extends through the thickness direction of the fin or a groove structure that extends along the surface of the fin.

6. A CPU air-cooling module with high airflow uniformity according to claim 5, characterized in that: The perforated structures are arranged in an array, and the groove structures are extended continuously or intermittently.

7. A CPU air-cooling module with high airflow uniformity according to claim 1, characterized in that: The outermost two rows of fins of the fin stack structure do not have opening structures (7), and the opening structures (7) are only distributed in the internal area of ​​the fin stack structure.

8. A CPU air-cooling module with high airflow uniformity according to claim 1, characterized in that: The opening direction of the opening structure (7) is consistent with the circumferential airflow velocity direction generated by the axial fan (1).

9. A CPU air-cooling module with high airflow uniformity according to claim 2, characterized in that: The opening structures (7) of the first fin group (8) and the fourth fin group (11) are symmetrically distributed, and the opening structures (7) of the second fin group (9) and the third fin group (10) are symmetrically arranged.

10. A CPU air-cooling module with high airflow uniformity according to claim 1, characterized in that: The total area of ​​the opening structure (7) accounts for less than 15% of the total area of ​​the fin.

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