Foreign matter prevention energy-saving long-acting heat dissipation fan

Abstract

The application discloses a foreign matter prevention energy-saving long-acting heat dissipation fan, which comprises a shell, a power part and a blade assembly arranged along the axis of the shell; the blade assembly comprises a heat dissipation rotating shaft, a centrifugal driving mechanism and a plurality of blade units uniformly distributed in the circumferential direction; the heat dissipation rotating shaft is connected with the output end of the power part; each blade unit is rotatably installed on the outer circumferential wall of the heat dissipation rotating shaft and is in transmission connection with the centrifugal driving mechanism; the centrifugal driving mechanism can be synchronously driven by the centrifugal force generated by the rotation of the heat dissipation rotating shaft to adjust the installation angle of each blade unit, so that the self-adaptive adjustment of high rotating speed to improve the air pressure and air volume and low rotating speed to reduce the operating power consumption is realized. The centrifugal force generated during the operation of the fan is used as the driving source, the sliding ring and the centrifugal driving mechanism are matched, the installation angle of the blade can be automatically adjusted according to the rotating speed of the heat dissipation rotating shaft, the fan can keep the optimal air pressure and air volume output state under different heat dissipation conditions, and the energy-saving and heat dissipation strengthening effects are realized.

Description

Technical Field

[0001] This invention relates to the field of fan technology, specifically to an energy-saving and long-lasting cooling fan that prevents foreign objects from entering. Background Technology

[0002] Currently, conventional cooling fans generally adopt a fixed-angle blade structure, with the blades rigidly connected to the shaft. The blade angle remains constant after leaving the factory, resulting in a fixed air pressure-airflow characteristic curve. However, in actual operation, the heat load of the object being cooled often fluctuates dynamically with the operating state. For example, the heat generation of electronic devices under full load can differ by several times from that under standby conditions. Fans with fixed blade structures cannot adapt to such dynamically changing cooling requirements: when the heat load is low, the fan's output airflow and air pressure far exceed the actual cooling demand, causing unnecessary energy consumption and hindering system energy efficiency optimization; when the heat load is high, the aerodynamic working capacity of the fixed blades has an upper limit, and the airflow capacity cannot be increased by adjusting the installation angle. This makes it difficult to cope with instantaneous high heat flux density conditions, easily leading to excessive temperature rise of the object being cooled and decreased operational stability.

[0003] On the other hand, when a cooling fan operates for extended periods in an environment containing hair, textile fibers, and dust, the intake airflow easily carries small foreign objects into the fan's interior, gradually accumulating in the area where the shaft connects to the blades. This accumulation of foreign objects continuously increases the shaft's rotational resistance, raising the motor load and power consumption. In severe cases, it can cause shaft jamming and motor overload damage. Simultaneously, the accumulation of foreign objects disrupts the dynamic balance of the blade assembly, exacerbating vibration and noise during fan operation and significantly shortening the fan's lifespan. Existing protective measures mostly involve installing a single-layer fixed protective mesh on the intake side, which can only block large debris and cannot effectively prevent small foreign objects such as hair and fine fibers. Furthermore, the mesh size of the protective mesh is fixed and cannot adaptively adjust according to the fan's operating conditions. At high speeds, the increased airflow suction makes it easier for small foreign objects to pass through the mesh and enter the fan's interior, resulting in very limited protective effectiveness. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an energy-saving and long-lasting cooling fan that prevents foreign objects from entering.

[0005] To achieve the above objectives, the specific solution of the present invention is as follows: A foreign object-proof, energy-saving, long-lasting cooling fan includes a housing and a power component and blade assembly disposed on the housing along the axial direction of the housing. The blade assembly includes a heat dissipation shaft, a centrifugal drive mechanism disposed on the heat dissipation shaft, and multiple blade units evenly distributed along the circumference of the heat dissipation shaft; the heat dissipation shaft is connected to the output end of the power component; each blade unit is rotatably mounted on the outer peripheral wall of the heat dissipation shaft and is respectively connected to the centrifugal drive mechanism; the centrifugal drive mechanism is configured to synchronously drive each blade unit to rotate relative to the heat dissipation shaft under the action of centrifugal force generated by the rotation of the heat dissipation shaft, so as to adjust the installation angle of each blade unit.

[0006] In a further embodiment of the present invention, the centrifugal drive mechanism includes a sliding ring slidably disposed on the heat dissipation shaft along the axial direction of the heat dissipation shaft and a plurality of counterweight sliders evenly distributed along the circumference of the heat dissipation shaft. A connecting rod is provided between the sliding ring and each blade unit. One end of the connecting rod is hinged to the ball head of the sliding ring, and the other end is hinged to the ball head of the corresponding blade unit. Each of the counterweight sliders is slidably disposed within the heat dissipation shaft along the radial direction of the heat dissipation shaft. Each of the counterweight sliders is slidably hinged to the sliding ring so that when it slides radially under the action of centrifugal force, it jointly drives the sliding ring to generate axial displacement.

[0007] Furthermore, the present invention provides two limiting plates for each counterweight slider of the sliding ring, and the counterweight slider is located between the two limiting plates. Each counterweight slider has a sliding shaft on both sides, and each limiting plate has a through-hole. The sliding shaft is movably embedded in the corresponding oblique hole, thereby converting the radial movement of the counterweight slider into the axial movement of the sliding ring.

[0008] Furthermore, in this invention, a first spring for resetting the counterweight slider is provided between the outer side of each counterweight slider and the inner wall of the heat dissipation shaft, and the first spring is arranged radially along the heat dissipation shaft.

[0009] In a further embodiment of the present invention, the end of the heat dissipation shaft is recessed with an annular groove, the sliding ring includes a first ring body and a second ring body, the first ring body is slidably disposed in the annular groove, the inner diameter of the second ring body is larger than the inner diameter of the first ring body, and a plurality of connecting arms evenly distributed along the circumference are connected between the first ring body and the second ring body, and one end of the connecting rod is hinged to the ball head of the second ring body.

[0010] Furthermore, each blade unit is provided with an eccentric connecting boss at its root, and the connecting boss is hinged to the ball joint at the other end of the connecting rod.

[0011] Furthermore, the present invention provides a first foreign object protection mesh and a second foreign object protection mesh located inside the first foreign object protection mesh on the air inlet side of the housing. The first foreign object protection mesh is fixedly installed inside the housing, and the second foreign object protection mesh is elastically slidably installed inside the housing along the axial direction of the housing. The second foreign object protection mesh is movably abutting against each of the connecting bosses, so that when each connecting boss swings to increase the installation angle of the blade unit, the second foreign object protection mesh can move toward the first foreign object protection mesh under the drive of the connecting bosses.

[0012] In a further embodiment of the present invention, the second foreign object protection net is equipped with a connecting ring by a plurality of circumferentially distributed connecting posts. The connecting ring is slidably sleeved on the outer peripheral wall of the heat dissipation rotating shaft and movably abuts against each connecting boss. The first foreign object protection net is provided with a plurality of circumferentially distributed guide posts, and the plurality of guide posts are arranged one-to-one with the plurality of connecting posts. The guide posts pass through the second foreign object protection net and are inserted into the corresponding connecting posts. A second spring is provided between the inner wall of the guide post and the corresponding connecting post, and the second spring is used for the reset of the second foreign object protection net.

[0013] Furthermore, the connecting boss is provided with a first ball socket, the sliding ring is provided with a second ball socket corresponding to each connecting rod, and ball joints are provided at both ends of the connecting rod, with the two ball joints of the connecting rod respectively ball-jointing into the corresponding first ball socket and second ball socket.

[0014] In a further embodiment of the present invention, the heat dissipation rotating shaft is provided with a sliding groove for each counterweight slider, and the counterweight slider is slidably installed in the corresponding sliding groove.

[0015] The beneficial effects of this invention are as follows: This invention utilizes the centrifugal force generated during fan operation as a driving source. By combining a sliding ring and a centrifugal drive mechanism, it forms a purely mechanical adaptive adjustment system. Without the need for additional sensors, controllers, or independent drive devices, it can automatically adjust the blade installation angle according to the rotational speed of the cooling shaft. At high speeds, it increases air pressure and airflow capacity, while at low speeds, it reduces air load and operating power consumption. This allows the fan to maintain optimal air pressure and airflow output under different cooling conditions, achieving a balance between energy saving and enhanced heat dissipation. Simultaneously, the change in blade installation angle can also adjust the mesh area of ​​the foreign object filter, reducing the entry of foreign objects such as hair and fibers into the shaft area, thus improving the fan's operational stability and service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cooling fan structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the cooling fan of the present invention; Figure 3 This is a cross-sectional schematic diagram of the cooling fan of the present invention from another perspective; Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle; Figure 5 This is a schematic diagram of the blade assembly of the present invention; Figure 6 This is a cross-sectional schematic diagram of the blade assembly of the present invention; Figure 7 yes Figure 6 A magnified view of a portion of point B in the middle; Figure 8 This is a schematic diagram of the centrifugal drive mechanism of the present invention; Explanation of reference numerals in the attached drawings: 1. Housing; 2. Power component; 31. Heat dissipation shaft; 311. Annular groove; 312. Sliding groove; 321. Sliding ring; 3211. First ring body; 3212. Second ring body; 3213. Connecting arm; 3214. Limiting plate; 3215. Inclined hole; 3216. Second ball socket; 322. Counterweight slider; 3221. Sliding shaft; 323. Connecting rod; 3231. Ball joint; 324. First spring; 33. Blade unit; 331. Connecting boss; 332. First ball socket; 41. First anti-foreign object mesh; 411. Guide post; 42. Second anti-foreign object mesh; 421. Connecting ring; 422. Connecting post; 423. Second spring. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not to limit the scope of the invention to this.

[0018] like Figures 1 to 8 As shown, the anti-foreign-object energy-saving long-lasting cooling fan of this embodiment includes a housing 1 and a power component 2 and a blade assembly disposed along the axial direction of the housing 1; the power component 2 is specifically a drive motor, which is fixedly installed at the center position of the air outlet side of the housing 1 to provide rotational power for the blade assembly. The blade assembly includes a heat dissipation shaft 31, a centrifugal drive mechanism disposed on the heat dissipation shaft 31, and multiple blade units 33 evenly distributed along the circumference of the heat dissipation shaft 31. The heat dissipation shaft 31 is connected to the output end of the power component 2. The number of blade units 33 can be freely set according to actual design needs. Each blade unit 33 is rotatably mounted on the outer peripheral wall of the heat dissipation shaft 31 and is respectively connected to the centrifugal drive mechanism. The centrifugal drive mechanism is configured to synchronously drive each blade unit 33 to rotate relative to the heat dissipation shaft 31 under the action of centrifugal force generated by the rotation of the heat dissipation shaft 31, so as to adjust the installation angle of each blade unit 33.

[0019] Specifically, each blade unit 33 has a rotating connection at its root. The rotating connection is hinged to the outer peripheral wall of the heat dissipation shaft 31 in the radial direction, so that the blade unit 33 can swing around its own radial hinge axis, thereby changing the installation angle of the blade unit and realizing adaptive adjustment of wind pressure and air volume.

[0020] During operation, the output torque of the power component 2 drives the cooling shaft 31 to rotate around its own axis. The cooling shaft 31 simultaneously drives all the blade units 33 to perform circular motion, propelling airflow to form a continuous cooling airflow. The centrifugal force generated during the rotation of the cooling shaft 31 directly acts on the centrifugal drive mechanism, which converts the centrifugal force into the rotational torque of the blade units 33, causing all the blade units 33 to deflect synchronously around their own rotation axis, thus achieving automatic adjustment of the installation angle. This embodiment uses the centrifugal force generated by the fan's own rotation as the sole drive source. Without the need for additional sensors, controllers, or independent drive components, it can adaptively match the blade installation angle according to the speed change of the cooling shaft 31, allowing the fan's output air pressure and airflow to dynamically adjust according to the cooling conditions. This ensures high-load cooling capacity while reducing unnecessary energy consumption under low loads, achieving a balance between energy saving and cooling performance.

[0021] The anti-foreign-object, energy-saving, long-lasting cooling fan in this embodiment, specifically, is as follows: Figure 2 , Figure 3 , Figures 5 to 8 As shown, the centrifugal drive mechanism includes a sliding ring 321 that slides axially along the heat dissipation shaft 31 and a plurality of counterweight sliders 322 evenly distributed circumferentially along the heat dissipation shaft 31. A connecting rod 323 is provided between the sliding ring 321 and each blade unit 33. One end of the connecting rod 323 is hinged to the ball head of the sliding ring 321, and the other end is hinged to the ball head of the corresponding blade unit 33. The number of counterweight sliders 322 is set according to the actual design requirements. Each counterweight slider 322 is slidably disposed within the heat dissipation shaft 31 along the radial direction. Each counterweight slider 322 is slidably hinged to the sliding ring 321 so that when it slides radially under the action of centrifugal force, it jointly drives the sliding ring 321 to generate axial displacement.

[0022] When the rotational speed of the heat dissipation shaft 31 increases, the circumferentially distributed counterweight sliders 322 are simultaneously subjected to centrifugal force and slide outward radially along the heat dissipation shaft 31. All counterweight sliders 322 work together on the sliding ring 321, smoothly pushing the sliding ring 321 to move axially along the heat dissipation shaft 31. During the axial movement of the sliding ring 321, the power is synchronously transmitted to the corresponding blade unit 33 through the connecting rods 323, causing all blade units 33 to synchronously deflect and adjust the installation angle. This embodiment adopts a circumferentially distributed multi-counterweight slider 322 structure, which can ensure that the sliding ring 321 is subjected to uniform force in the circumference and avoid unilateral load jamming. The synchronous transmission of the multi-link 323 can ensure that the installation angle adjustment range of all blade units 33 is completely consistent, maintain the overall dynamic balance of the blade assembly, prevent abnormal vibration and noise during fan operation, and improve operational stability and service life.

[0023] The anti-foreign-object, energy-saving, long-lasting cooling fan in this embodiment, specifically, is as follows: Figure 8 As shown, on the side of the sliding ring 321 facing the counterweight slider 322, two limiting plates 3214 are respectively provided for each counterweight slider 322. The limiting plates 3214 are integrally formed with the sliding ring 321, and the counterweight slider 322 is located between the two corresponding limiting plates 3214. Each counterweight slider 322 has a sliding shaft 3221 on both sides. Each limiting plate 3214 has a through-hole 3215. The sliding shaft 3221 is movably embedded in the corresponding oblique hole 3215, thereby converting the radial movement of the counterweight slider 322 into the axial movement of the sliding ring 321.

[0024] When the counterweight slider 322 slides radially, the sliding shafts 3221 on both sides slide synchronously along the inner wall of the inclined hole 3215 of the corresponding limiting plate 3214. Since the inclined hole 3215 extends obliquely along the axial direction of the heat dissipation shaft 31, the radial displacement of the sliding shaft 3221 will generate an axial component force on the limiting plate 3214 through the inclined surface of the inclined hole 3215, thereby driving the entire sliding ring 321 to move axially, completing the conversion from radial centrifugal motion to axial transmission. In this embodiment, the motion conversion is achieved through the cooperation of the inclined hole 3215 and the sliding shaft 3221. The transmission process is continuous and smooth, and the blade installation angle can be continuously adjusted steplessly without the sudden impact of gear adjustment. At the same time, the two limiting plates 3214 clamp the counterweight slider 322 from both sides, which can limit the circumferential displacement of the counterweight slider 322, ensure the accuracy of the transmission direction, and improve the reliability of the mechanism operation and the accuracy of angle adjustment.

[0025] The anti-foreign-object, energy-saving, long-lasting cooling fan in this embodiment, specifically, is as follows: Figures 6 to 8 As shown, a first spring 324 for resetting the counterweight slider 322 is provided between the outer side of each counterweight slider 322 and the inner wall of the heat dissipation shaft 31. The first spring 324 is arranged radially along the heat dissipation shaft 31.

[0026] When the rotational speed of the cooling shaft 31 increases and the centrifugal force on the counterweight slider 322 exceeds the elastic force of the first spring 324, the counterweight slider 322 slides radially outward and compresses the first spring 324 to store elastic potential energy, causing the blade mounting angle to increase synchronously with the increase in rotational speed. When the rotational speed of the cooling shaft 31 decreases and the centrifugal force is less than the elastic force of the first spring 324, the first spring 324 releases its elastic potential energy, pushing the counterweight slider 322 to slide radially inward and reset, causing the blade mounting angle to decrease synchronously. The first spring 324 provides a stable reset elastic force for the counterweight slider 322, ensuring a continuous matching relationship between the blade mounting angle and the rotational speed of the cooling shaft 31. Simultaneously, it provides radial preload to the counterweight slider 322, preventing radial movement and abnormal noise at low speeds and ensuring the smooth operation of the fan across the entire speed range.

[0027] The anti-foreign-object, energy-saving, long-lasting cooling fan in this embodiment, specifically, is as follows: Figures 6 to 8 As shown, the end of the heat dissipation shaft 31 is recessed with an annular groove 311. The sliding ring 321 includes a first ring body 3211 and a second ring body 3212. The first ring body 3211 is slidably disposed in the annular groove 311. The inner diameter of the second ring body 3212 is larger than the inner diameter of the first ring body 3211. A plurality of connecting arms 3213 are evenly distributed along the circumference between the first ring body 3211 and the second ring body 3212. One end of the connecting rod 323 is hinged to the ball head of the second ring body 3212. The first ring body 3211, the second ring body 3212, and the connecting arms 3213 are integrally formed. The limiting plate 3214 is integrally formed on the side of the first ring body 3211 facing away from the second ring body 3212. The limiting plate 3214 is located in the annular groove 311.

[0028] When the sliding ring 321 is driven by the counterweight slider 322 to generate axial displacement, the first ring body 3211 slides axially along the inner wall of the annular groove 311. The groove wall of the annular groove 311 provides full-circumferential guiding support for the first ring body 3211, ensuring that the sliding ring 321 always remains coaxial with the heat dissipation shaft 31, and avoiding radial swaying and jamming of the sliding ring 321. The second ring body 3212 moves synchronously with the first ring body 3211 through the circumferentially distributed connecting arms 3213, providing an outer mounting point for the connecting rod 323. This embodiment adopts a double-ring body with annular groove 311 guiding structure, which not only ensures the coaxiality of the movement and the smoothness of operation of the sliding ring 321, but also expands the arrangement radius of the connecting rod 323 through the second ring body 3212, which is more suitable for the root connection position of the blade unit 33, optimizes the force transmission angle of the connecting rod 323, and reduces frictional loss during transmission.

[0029] The anti-foreign-object, energy-saving, long-lasting cooling fan in this embodiment, specifically, is as follows: Figure 5 and Figure 6As shown, each blade unit 33 has an eccentrically positioned connecting boss 331 at its root. Specifically, the connecting boss 331 is located on one side of the rotating connection portion of the blade unit 33, and is ball-jointed to the other end of the connecting rod 323. When the sliding ring 321 moves axially, it drives the connecting rod 323 to perform axial translation. The connecting rod 323 pushes and pulls the connecting boss 331, generating a force. Since the connecting boss 331 is offset from the rotation axis of the blade unit 33, this force generates a torque on the rotation axis of the blade unit 33, thereby driving the blade unit 33 to oscillate around its own rotation axis, thus adjusting the installation angle. This embodiment uses an eccentric boss transmission structure, which can reliably convert the linear motion of the connecting rod 323 into the rotational oscillation of the blade unit 33. The structure is simple and compact, and the transmission efficiency is high. By adjusting the eccentric distance of the connecting boss 331, the adjustment range of the blade installation angle and the magnitude of the transmission torque can be flexibly adjusted to meet the performance design requirements of different fan specifications.

[0030] The anti-foreign-object, energy-saving, long-lasting cooling fan in this embodiment, specifically, is as follows: Figures 2 to 4 As shown, the air inlet side of the housing 1 is provided with a first foreign object protection net 41 and a second foreign object protection net 42 located inside the first foreign object protection net 41. The first foreign object protection net 41 is fixedly installed inside the housing 1, and the second foreign object protection net 42 is elastically slidably installed inside the housing 1 along the axial direction of the housing 1. The second foreign object protection net 42 is movably abutted against each of the connecting bosses 331, so that when each connecting boss 331 swings to increase the installation angle of the blade unit 33, the second foreign object protection net 42 can move toward the first foreign object protection net 41 under the drive of the connecting bosses 331.

[0031] When the rotational speed of the heat dissipation shaft 31 increases and the installation angle of the blade unit 33 increases, the connecting boss 331 swings synchronously with the blade unit 33 and axially pushes the second foreign object protection mesh 42, causing the second foreign object protection mesh 42 to move axially toward the first foreign object protection mesh 41. The overlap of the meshes of the two layers of foreign object protection mesh increases, and the effective ventilation area decreases. When the rotational speed decreases and the installation angle of the blade unit 33 decreases, the thrust of the connecting boss 331 weakens, and the second foreign object protection mesh 42 slides back to its original position under the action of elasticity. The distance between the two layers of mesh increases, and the effective ventilation area is restored. In this embodiment, the flow area on the air inlet side can be adaptively adjusted according to the fan speed. When the airflow suction is strong at high speeds and foreign objects are easily sucked in, the flow area is reduced to improve the foreign object blocking ability and reduce the entry of small foreign objects such as hair, fibers, and lint into the fan and wrap around the shaft. At low speeds, the flow area is restored to ensure normal heat dissipation airflow and achieve a dynamic balance between protection performance and ventilation performance.

[0032] The anti-foreign-object, energy-saving, long-lasting cooling fan in this embodiment, specifically, is as follows: Figures 2 to 4As shown, the second foreign object protection net 42 is equipped with a connecting ring 421 through multiple circumferentially distributed connecting posts 423. The connecting ring 421 is slidably sleeved on the outer peripheral wall of the heat dissipation rotating shaft 31 and movably abuts against each connecting boss 331. The first foreign object protection net 41 is provided with multiple circumferentially distributed guide posts 422. The multiple guide posts 422 are correspondingly arranged with the multiple connecting posts 423. The guide posts 422 pass through the second foreign object protection net 42 and are inserted into the corresponding connecting posts 423. A second spring 424 is provided between the inner wall of the guide post 422 and the corresponding connecting post 423. The second spring 424 is used for the reset of the second foreign object protection net 42.

[0033] Specifically, when the connecting boss 331 swings, it first pushes the connecting ring 421 to slide axially along the outer wall of the heat dissipation shaft 31. The connecting ring 421 drives the second anti-foreign object net 42 to move axially along the guide post 422 through the circumferentially distributed connecting posts 423. At the same time, the second spring 424 is compressed between the end of the guide post 422 and the inner wall of the connecting post 423 to store elastic potential energy. When the thrust of the connecting boss 331 is released, the second spring 424 releases its elastic force, pushing the connecting post 423 to drive the second anti-foreign object net 42 and the connecting ring 421 to slide back to their original positions along the guide post 422. In this embodiment, the guide post 422 and the connecting post 423 are inserted together to provide axial guidance for the second foreign object protection net 42, preventing the second foreign object protection net 42 from circumferentially deflecting or radially shifting, and avoiding jamming. Moreover, the structure of multiple circumferentially distributed guide posts 422 and the second spring 424 can ensure that the second foreign object protection net 42 is subjected to uniform force at all points, moves smoothly, and resets accurately, ensuring the consistency of the mesh overlap adjustment.

[0034] The anti-foreign-object, energy-saving, long-lasting cooling fan in this embodiment, specifically, is as follows: Figures 2 to 6 , Figure 8 As shown, the connecting boss 331 is provided with a first ball socket 332, and the sliding ring 321 is provided with a second ball socket 3216 for each connecting rod 323. Ball joints 3231 are provided at both ends of the connecting rod 323, and the two ball joints 3231 of the connecting rod 323 are respectively ball-connected to the corresponding first ball socket 332 and second ball socket 3216.

[0035] Specifically, during the transmission process of axial movement of the sliding ring 321 and oscillation of the blade unit 33, the spatial angle of the connecting rod 323 continuously changes. The ball joints 3231 at both ends can rotate freely within the corresponding first ball socket 332 and second ball socket 3216, automatically adapting to multi-angle deviations during the transmission process. The ball joint connection method adopted in this embodiment can adapt to multi-dimensional angle changes, effectively eliminate motion interference, ensure smooth and unhindered transmission, reduce friction and wear between components, and improve the service life of the transmission mechanism; at the same time, it can reduce the assembly precision requirements of each component, facilitate production assembly, and improve production assembly efficiency.

[0036] The anti-foreign-object, energy-saving, long-lasting cooling fan in this embodiment, specifically, is as follows: Figure 6 and Figure 7 As shown, the heat dissipation shaft 31 has a groove 312 corresponding to each counterweight slider 322, and the counterweight slider 322 is slidably installed in the corresponding groove 312. Specifically, the groove 312 is recessed from the bottom of the annular groove 311, one end of the counterweight slider 322 is slidably connected in the groove 312, and the other end extends movably between the two corresponding limiting plates 3214. With this configuration, the counterweight slider 322 slides radially back and forth along the extension direction of the groove 312 under the combined action of centrifugal force and the elastic force of the first spring 324. The slide groove 312 can restrict the motion freedom of the counterweight slider 322, so that it can only move linearly along the radial direction of the heat dissipation shaft 31, avoiding circumferential movement or axial displacement of the counterweight slider 322, ensuring that the direction of centrifugal force is consistent with the sliding direction, and improving the transmission efficiency and angle adjustment accuracy of the centrifugal drive; at the same time, the slide groove 312 structure can provide load-bearing and limiting for the counterweight slider 322, improving the stability of the counterweight slider 322 under high-speed operation, avoiding detachment or jamming failures, and ensuring long-term reliable operation of the mechanism.

[0037] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included within the protection scope of this patent application.

Claims

1. A foreign object-resistant, energy-saving, long-lasting cooling fan, characterized in that, Includes a housing and power components and blade assemblies disposed on the housing along the axial direction of the housing; The blade assembly includes a heat dissipation shaft, a centrifugal drive mechanism disposed on the heat dissipation shaft, and multiple blade units evenly distributed along the circumference of the heat dissipation shaft; the heat dissipation shaft is connected to the output end of the power component; each blade unit is rotatably mounted on the outer peripheral wall of the heat dissipation shaft and is respectively connected to the centrifugal drive mechanism; the centrifugal drive mechanism is configured to synchronously drive each blade unit to rotate relative to the heat dissipation shaft under the action of centrifugal force generated by the rotation of the heat dissipation shaft, so as to adjust the installation angle of each blade unit.

2. The anti-foreign-object, energy-saving, long-lasting cooling fan according to claim 1, characterized in that, The centrifugal drive mechanism includes a sliding ring that slides along the axial direction of the heat dissipation shaft and multiple counterweight sliders that are evenly distributed along the circumference of the heat dissipation shaft. A connecting rod is provided between the sliding ring and each blade unit. One end of the connecting rod is hinged to the ball head of the sliding ring, and the other end is hinged to the ball head of the corresponding blade unit. Each of the counterweight sliders is slidably disposed within the heat dissipation shaft along the radial direction of the heat dissipation shaft. Each of the counterweight sliders is slidably hinged to the sliding ring so that when it slides radially under the action of centrifugal force, it jointly drives the sliding ring to generate axial displacement.

3. The anti-foreign-object, energy-saving, long-lasting cooling fan according to claim 2, characterized in that, The sliding ring is provided with two limiting plates for each counterweight slider, and the counterweight slider is located between the two corresponding limiting plates. Each counterweight slider is provided with a sliding shaft on both sides, and each limiting plate is provided with a through-hole. The sliding shaft is movably embedded in the corresponding through-hole, thereby converting the radial movement of the counterweight slider into the axial movement of the sliding ring.

4. The anti-foreign-object, energy-saving, long-lasting cooling fan according to claim 2, characterized in that, A first spring for resetting the counterweight slider is provided between the outer side of each counterweight slider and the inner wall of the heat dissipation shaft. The first spring is arranged radially along the heat dissipation shaft.

5. The anti-foreign-object, energy-saving, long-lasting cooling fan according to claim 2, characterized in that, The end of the heat dissipation shaft is recessed with an annular groove. The sliding ring includes a first ring body and a second ring body. The first ring body is slidably disposed in the annular groove. The inner diameter of the second ring body is larger than the inner diameter of the first ring body. A plurality of connecting arms are evenly distributed circumferentially between the first ring body and the second ring body. One end of the connecting rod is hinged to the ball head of the second ring body.

6. The anti-foreign-object, energy-saving, long-lasting cooling fan according to claim 2, characterized in that, Each blade unit is provided with an eccentric connecting boss at its root, and the connecting boss is hinged to the ball joint at the other end of the connecting rod.

7. The anti-foreign-object, energy-saving, long-lasting cooling fan according to claim 6, characterized in that, The air inlet side of the housing is provided with a first foreign object protection net and a second foreign object protection net located inside the first foreign object protection net. The first foreign object protection net is fixedly installed inside the housing, and the second foreign object protection net is elastically slidably installed inside the housing along the axial direction of the housing. The second foreign object protection net is movably abutting against each of the connecting bosses, so that when each connecting boss swings to increase the installation angle of the blade unit, the second foreign object protection net can move towards the first foreign object protection net under the drive of the connecting bosses.

8. The anti-foreign-object, energy-saving, long-lasting cooling fan according to claim 7, characterized in that, The second foreign object protection net is equipped with connecting rings through multiple circumferentially distributed connecting posts. The connecting rings are slidably sleeved on the outer peripheral wall of the heat dissipation rotating shaft and movably abut against each connecting boss. The first foreign object protection net is provided with multiple circumferentially distributed guide posts, and the multiple guide posts are arranged one-to-one with the multiple connecting posts. The guide posts pass through the second foreign object protection net and are inserted into the corresponding connecting posts. A second spring is provided between the inner wall of the guide post and the corresponding connecting post. The second spring is used for the reset of the second foreign object protection net.

9. The anti-foreign-object, energy-saving, long-lasting cooling fan according to claim 6, characterized in that, The connecting boss is provided with a first ball socket, and the sliding ring is provided with a second ball socket for each connecting rod. Ball joints are provided at both ends of the connecting rod, and the two ball joints of the connecting rod are respectively ball-jointed to the corresponding first ball socket and second ball socket.

10. The anti-foreign-object, energy-saving, long-lasting cooling fan according to claim 2, characterized in that, The heat dissipation shaft has a groove for each counterweight slider, and the counterweight slider is slidably installed in the corresponding groove.

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