A vibration-damping, noise-reducing, and silent heat sink

Abstract

This utility model discloses a vibration-damping and noise-reducing silent heat sink, including a heat sink assembly, a fan, and a base plate. It also includes a vibration-damping connector and a flow guide shroud. The vibration-damping connector is made of an elastic material and has a ring-shaped structure, nested between the fan and the flow guide shroud. The flow guide shroud surrounds the air outlet side of the fan, and its inner wall has a spiral flow guide groove. The heat sink assembly includes multiple wavy, non-equidistantly arranged heat dissipation fins, forming a gradually expanding airflow channel. The bottom of the base plate has a honeycomb-shaped vibration-damping cavity filled with damping adhesive. The three-stage vibration-damping structure significantly reduces vibration transmission rate, reduces resonance, and extends equipment life. The spiral flow guide groove, sound-absorbing grille, and wavy fin phase difference design significantly reduce wind noise and structural noise.

Description

Technical Field

[0001] This utility model relates to the field of radiator technology, specifically a vibration-damping, noise-reducing, and silent radiator. Background Technology

[0002] As electronic devices evolve towards higher power and miniaturization, the heat dissipation efficiency and operational stability of heat sinks have become crucial. Traditional heat sinks suffer from several shortcomings: the fan, shroud, and frame are mostly rigidly connected, allowing vibrations to be directly transmitted to the device body, causing resonance, which not only shortens the device's lifespan but also generates low-frequency structural noise; the shroud lacks optimized design, and the rotating vortices and turbulence generated by the fan exhaust cause significant wind noise; the heat dissipation fins are mostly arranged in a straight, equidistant pattern, which easily creates impact turbulence, reducing heat dissipation efficiency and exacerbating aerodynamic noise; at the same time, there is a contradiction between heat dissipation and vibration reduction. Enhancing heat dissipation often requires increasing fan speed, further increasing vibration and noise, while simple vibration reduction design may sacrifice heat dissipation performance, making it difficult to meet the comprehensive requirements of precision electronic devices for quiet operation, high efficiency, and low vibration. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a vibration-damping, noise-reducing, and silent heat sink, which can effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A vibration-damping and noise-reducing silent heat sink includes a heat sink assembly, a fan, and a base plate. It also includes a vibration-damping connector and a flow guide shroud. The vibration-damping connector is made of an elastic material and has a ring structure, nested between the fan and the flow guide shroud. The flow guide shroud surrounds the air outlet side of the fan and has a spiral flow guide groove on its inner wall. The heat sink assembly includes multiple heat sink fins arranged in a wavy, non-equidistant pattern, forming a gradually expanding airflow channel between the heat sink fins. The bottom of the base plate has a honeycomb-shaped vibration-damping cavity filled with damping adhesive.

[0006] As a further description of the above technical solution, the cross-section of the vibration damping connector is an I-shaped structure. The vibration damping connector includes an upper slot, a lower slot, and an elastic rib connecting the two. The upper slot engages with the edge of the air guide, and the lower slot engages with the outer frame of the fan.

[0007] As a further description of the above technical solution, the spiral guide groove has a rotation direction opposite to that of the fan blades, and the groove depth of the spiral guide groove gradually decreases from the air inlet to the air outlet.

[0008] As a further description of the above technical solution, the wave amplitude of the heat dissipation fins decreases gradually along the airflow direction, and the phase difference between the wave peaks of adjacent heat dissipation fins is 15°-30°.

[0009] As a further description of the above technical solution, the honeycomb damping cavity of the substrate is a hexagonal prism array, and the cavity wall thickness of the honeycomb damping cavity is 0.2-0.5mm.

[0010] As a further description of the above technical solution, it also includes a split frame for fan mounting, the split frame being composed of an inner frame and an outer frame, the inner frame and the outer frame being connected by spring columns, and the fan being fixed on the inner frame.

[0011] As a further description of the above technical solution, the spring column is a hollow rubber column, and the interior of the spring column is provided with cross-arranged metal spring sheets.

[0012] As a further description of the above technical solution, a copper-aluminum composite transition layer is provided at the connection between the heat dissipation fins and the substrate, and the transition layer has a sawtooth-shaped interlocking interface.

[0013] As a further description of the above technical solution, the air outlet edge of the air guide is provided with a sound-absorbing grille, and the through hole diameter of the sound-absorbing grille is 0.8-1.2mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The vibration-damping, noise-reducing, and silent radiator of this utility model has at least one of the following beneficial effects during use:

[0016] The three-stage vibration reduction structure significantly reduces vibration transmission rate, minimizes resonance, and extends equipment lifespan. The spiral guide channel, sound-absorbing grille, and wave-shaped fin phase difference design significantly reduce wind noise and structural noise. The copper-aluminum composite transition layer and wave-shaped fins increase heat conduction and heat dissipation area, while the gradually expanding airflow enhances heat exchange efficiency. It combines lightweight and modular design, adapting to various equipment. This achieves a synergy of quiet operation, efficient heat dissipation, and low vibration, meeting the comprehensive needs of precision electronic equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a vibration-damping, noise-reducing, and silent radiator according to the present invention;

[0018] Figure 2 This is a partially exploded structural diagram of a vibration-damping, noise-reducing, and silent radiator according to the present invention.

[0019] Figure 3 This is a side view of the vibration-damping, noise-reducing, and silent heat sink of this utility model;

[0020] Figure 4 This is a perspective structural diagram of a vibration-damping, noise-reducing, and silent heat sink according to the present invention.

[0021] Numbering on the map:

[0022] 1. Heat sink assembly; 101. Heat sink fins; 2. Fan; 201. Split frame; 202. Spring pillar; 203. Outer frame; 204. Inner frame; 3. Airflow guide; 301. Vibration damping connector; 302. Noise-absorbing grille; 303. Upper slot; 304. Elastic rib; 305. Lower slot; 306. Spiral airflow guide groove; 4. Base plate; 401. Honeycomb vibration damping cavity; 402. Copper-aluminum composite transition layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-4 As shown, this utility model provides a vibration-damping and noise-reducing silent heat sink, including a heat sink assembly 1, a fan 2, and a base plate 4, and also includes a vibration-damping connector 301 and a flow guide shroud 3. The vibration-damping connector 301 is made of elastic material and has a ring structure, nested between the fan 2 and the flow guide shroud 3. The flow guide shroud 3 surrounds the air outlet side of the fan 2, and its inner wall is provided with a spiral flow guide groove 306. The heat sink assembly 1 includes multiple heat sink fins 101 arranged in a wave-shaped non-equidistant manner, and the heat sink fins 101 form a gradually expanding air channel. The bottom of the base plate 4 is provided with a honeycomb-shaped vibration-damping cavity 401, and the honeycomb-shaped vibration-damping cavity 401 is filled with damping glue.

[0025] Among them, the spiral guide groove 306 on the inner wall rotates in the opposite direction to the blades of the fan 2, guiding the airflow to form a reverse spiral motion to counteract the rotating vortex of the airflow from the fan 2.

[0026] The amplitude of the wave-shaped fins decreases along the airflow direction, allowing the airflow to gradually and smoothly transition; the 15°-30° phase difference between the wave crests of adjacent fins avoids synchronous airflow impact that could cause resonance noise; and the non-equidistantly arranged, gradually expanding air ducts reduce airflow compression turbulence.

[0027] The honeycomb-shaped damping cavity 401 (cavity wall thickness 0.2-0.5mm) of the hexagonal prism array at the bottom of the substrate 4, together with the internal damping adhesive, utilizes the multidirectional dispersion characteristics of the honeycomb structure to convert the remaining vibration energy into heat energy for consumption. At the same time, the damping adhesive absorbs high-frequency vibrations through intramolecular friction.

[0028] This embodiment features a three-stage vibration reduction structure (vibration reduction connector 301 + spring column 202 + honeycomb damping cavity) that significantly reduces vibration transmission rate, reduces resonance between fan 2 and the machine body, and extends the service life of the equipment, making it especially suitable for precision electronic equipment.

[0029] Furthermore, the cross-section of the vibration damping connector 301 is an I-shaped structure. The vibration damping connector 301 includes an upper slot 303, a lower slot 305, and an elastic rib 304 connecting the two. The upper slot 303 engages with the edge of the air guide shroud 3, and the lower slot 305 engages with the outer frame of the fan 2.

[0030] The annular vibration damping connector 301, made of elastic material, uses the upper slot 303 and lower slot 305 of the I-shaped cross section to respectively engage the guide shroud 3 and the outer frame of the fan 2. The deformation of the middle elastic rib 304 absorbs the radial and axial vibrations generated by the operation of the fan 2, blocking the direct transmission of vibration from the fan 2 to the guide shroud 3.

[0031] Furthermore, the spiral guide groove 306 rotates in the opposite direction to the fan blades 2, and its depth gradually decreases from the air inlet to the air outlet. This gradual decrease in depth ensures a smooth increase in airflow velocity, reducing turbulent noise. The outlet noise-absorbing grille 302 (0.8-1.2mm aperture) absorbs high-frequency wind noise through the Helmholtz resonance principle.

[0032] Furthermore, the wave amplitude of the heat dissipation fins 101 decreases progressively along the airflow direction, and the phase difference between the wave crests of adjacent heat dissipation fins 101 is 15°-30°. The wave-shaped fins increase the heat dissipation area, and the gradually expanding air duct, combined with the rectifying effect of the guide shroud 3, ensures that the airflow flows evenly over the fin surface, improving the convective heat transfer efficiency; the accelerating effect of the spiral guide grooves 306 enhances the airflow penetration, ensuring that heat is carried away in a timely manner.

[0033] Furthermore, the honeycomb-shaped damping cavity 401 of the substrate 4 is a hexagonal prism array, and the cavity wall thickness of the honeycomb-shaped damping cavity 401 is 0.2-0.5mm. The honeycomb substrate 4 combines lightweight and high strength characteristics, making it suitable for various applications such as laptops and servers.

[0034] Furthermore, it also includes a split frame 201 for mounting the fan 2. The split frame 201 consists of an inner frame 204 and an outer frame 203. The inner frame 204 and the outer frame 203 are connected by a spring post 202. The fan 2 is fixed on the inner frame 204.

[0035] The fan 2 is fixed to the inner frame 204. The inner frame 204 and the outer frame 203 are connected by hollow rubber spring columns 202. The cross metal springs inside the rubber columns ensure structural stability and further attenuate vibration through the elastic deformation of the rubber and the elastic reset of the metal springs, forming a secondary vibration reduction.

[0036] Furthermore, the spring column 202 is a hollow rubber column, and its interior contains cross-arranged metal springs. The spring column 202 significantly reduces vibration transmission rate, minimizing resonance between the fan 2 and the machine body, and extending the equipment's service life.

[0037] Furthermore, a copper-aluminum composite transition layer 402 is provided at the connection between the heat dissipation fins 101 and the substrate 4. This transition layer has a sawtooth-shaped interlocking interface. The sawtooth-shaped interlocking interface of the copper-aluminum composite transition layer 402 reduces structural vibration caused by thermal stress. At the same time, the vibration damping components work together to reduce the resonant frequency and avoid structural noise. The heat dissipation fins 101 and the substrate 4 are connected through the sawtooth-shaped copper-aluminum composite transition layer 402, which increases the contact area and reduces the contact thermal resistance, accelerating the transfer of heat from the substrate 4 to the fins.

[0038] Furthermore, the air outlet edge of the air guide shroud 3 is provided with a sound-absorbing grille 302, the through-hole diameter of which is 0.8-1.2mm. Combined with the spiral guide groove 306 and the phase difference fin structure, wind noise is significantly reduced, the structural vibration reduction design reduces vibration noise, and the sound-absorbing grille 302 further absorbs high-frequency noise, resulting in an overall reduction in noise.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vibration and noise reduction silencer comprising a fin group, a fan and a base plate, characterized in that: It also includes a vibration damping connector and a flow guide. The vibration damping connector is made of elastic material and has a ring structure. It is nested between the fan and the flow guide. The flow guide surrounds the air outlet side of the fan and has a spiral flow guide groove on its inner wall. The heat sink assembly includes multiple heat sink fins arranged in a wave-shaped non-equidistant pattern. The heat sink fins form a gradually expanding air channel. The bottom of the substrate has a honeycomb-shaped vibration damping cavity, which is filled with damping adhesive. ​ 2. The vibration and noise reduction silent heat spreader of claim 1, wherein: The cross-section of the vibration damping connector is an I-shaped structure. The vibration damping connector includes an upper slot, a lower slot, and an elastic rib connecting the two. The upper slot engages with the edge of the air guide, and the lower slot engages with the outer frame of the fan.

3. The vibration-damping, noise-reducing, and silent heat sink according to claim 1, characterized in that: The spiral guide groove rotates in the opposite direction to the fan blades, and the groove depth gradually decreases from the air inlet to the air outlet.

4. The vibration-damping, noise-reducing, and silent heat sink according to claim 1, characterized in that: The wave amplitude of the heat dissipation fins decreases gradually along the airflow direction, and the phase difference between the wave crests of adjacent heat dissipation fins is 15°-30°.

5. The vibration-damping, noise-reducing, and silent heat sink according to claim 1, characterized in that: The honeycomb-shaped vibration damping cavity of the substrate is a hexagonal prism array, and the cavity wall thickness of the honeycomb-shaped vibration damping cavity is 0.2-0.5mm.

6. The vibration-damping, noise-reducing, and silent heat sink according to claim 1, characterized in that: It also includes a split frame for fan mounting, the split frame consisting of an inner frame and an outer frame, the inner frame and the outer frame being connected by spring columns, and the fan being fixed to the inner frame.

7. The vibration-damping, noise-reducing, and silent radiator according to claim 6, characterized in that: The spring post is a hollow rubber post, and the interior of the spring post is provided with cross-arranged metal spring plates.

8. The vibration-damping, noise-reducing, and silent heat sink according to claim 1, characterized in that: A copper-aluminum composite transition layer is provided at the connection between the heat dissipation fins and the substrate, and the transition layer has a sawtooth-shaped interlocking interface.

9. The vibration-damping, noise-reducing, and silent heat sink according to claim 1, characterized in that: The air outlet edge of the air guide is provided with a sound-absorbing grille, and the through hole diameter of the sound-absorbing grille is 0.8-1.2mm.

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