CN113079656B

CN113079656B - Noise reduction structure and electronic device with same

Info

Publication number: CN113079656B
Application number: CN202010007423.1A
Authority: CN
Inventors: 徐仲恺; 洪忠仁; 陈钦洲
Original assignee: Hongfujin Precision Industry Wuhan Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Wuhan Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2020-01-04
Filing date: 2020-01-04
Publication date: 2023-10-27
Anticipated expiration: 2040-01-04
Also published as: CN113079656A

Abstract

A noise reduction structure is embedded in a front shell. The noise reduction structure is a hollow structure and comprises a first surface and a second surface. The first surface is disposed coplanar with the front housing. The second surface is disposed between the first surface and the rear housing and is spaced a predetermined distance from the first surface. The second surface includes a plurality of shielding portions and a plurality of the retaining walls. Each retaining wall is overlapped with the shielding part and is positioned between the shielding part and the rear shell. The retaining wall is of a hollow structure. Each retaining wall and the corresponding shielding part form a noise reduction flow channel, and noise is absorbed after being impacted back and forth in the noise reduction flow channel so as to realize the noise reduction function. The invention also provides an electronic device with the noise reduction structure.

Description

Noise reduction structure and electronic device with same

Technical Field

The invention relates to a noise reduction structure and an electronic device with the same.

Background

The problem of heat dissipation and noise in high-power electronic devices is a major factor affecting the normal operation of the electronic devices. If the heat dissipation is not good, the operation stability of the electronic components in the electronic device is caused, and the operation of the electronic device is further affected. In the prior art, a fan is generally used for heat dissipation. When the temperature is high, the rotation speed of the fan is increased, and noise is generated. Can affect the health of users in noisy environments for long periods of time.

Disclosure of Invention

In view of the above, the present invention provides a noise reduction structure capable of reducing noise.

It is also necessary to provide an electronic device with a noise reduction structure.

The noise reduction structure is embedded in the front shell of the electronic device; the noise reduction structure is a hollow shell, which comprises:

a first surface disposed coplanar with the front housing;

a second surface disposed between the first surface and a rear housing of the electronic device and spaced a predetermined distance from the first surface; the second surface comprises a plurality of shielding parts and a plurality of retaining walls;

each retaining wall is overlapped with the shielding part and is positioned between the shielding part and the rear shell; the retaining wall is of a hollow structure; each retaining wall and the corresponding shielding part form a noise reduction flow channel, and noise is absorbed after being impacted back and forth in the noise reduction flow channel.

An electronic device with a noise reduction structure comprises a front shell, a noise reduction structure and a rear shell; the front shell and the rear shell are matched to form an accommodating space so as to accommodate the noise reduction structure in the accommodating space; the front housing has an opening; the noise reduction structure is embedded in the front shell and exposed through the opening; the noise reduction structure is a hollow shell, which comprises:

a first surface disposed coplanar with the front housing;

Above-mentioned structure of making an uproar and have the electron device of making an uproar structure falls, through setting up hollow barricade and the runner of making an uproar that falls that the cooperation of shielding part formed can be right electron device falls, and then improves electron device's use impression.

Drawings

Fig. 1 is a schematic perspective view of an electronic device according to a preferred embodiment.

Fig. 2 is a partially exploded view of the electronic device of fig. 1.

FIG. 3 is a schematic view of the noise reducing structure of FIG. 2 at another angle.

Fig. 4 is a schematic cross-sectional view of the noise reducing structure of fig. 3 along IV-IV.

FIG. 5 is a schematic diagram of the noise reduction structure of FIG. 2 in a first condition illustrating a curve of a test static pressure change.

FIG. 6 is a graph showing the test noise curve of the noise reducing structure of FIG. 2 under a second condition.

Description of the main reference signs

Electronic device 1

Front housing 11

Rear housing 13

Main circuit board 20

Noise reduction structure 30

Opening 110

First surface 32

Hollowed-out portion 321

Second surface 34

Edge portion 341

Connection portion 342

Shielding portion 345

Cavity 346

Retaining wall 347

Noise reduction runner 349

The invention will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

In describing embodiments of the present invention, it should be noted that the term "coupled" should be interpreted broadly, unless otherwise indicated and limited thereto, such as being either fixedly coupled, detachably coupled, or integrally coupled; can be mechanically connected, electrically connected or can be communicated with each other; either directly or indirectly, through intervening elements may be in communication or in an interactive relationship between the two elements. It will be apparent to those skilled in the art that the specific meaning of the terms described above in the present invention may be set forth immediately according to circumstances.

The terms first, second, third and the like in the description and in the claims of the invention and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the term "include" and any variations thereof is intended to cover a non-exclusive inclusion.

The following describes specific embodiments of the electronic device according to the present invention with reference to the drawings.

Please refer to fig. 1, which is a perspective view of an electronic device 1 according to a preferred embodiment of the present invention. The electronic device 1 may be applied to devices having high power electronic devices, such as a host computer, a server, and a home appliance, but is not limited thereto.

Please refer to fig. 2, which is a partially exploded view of the electronic device 1 according to the preferred embodiment. The electronic device 1 includes a front case 11, a main circuit board 20, a noise reduction structure 30, and a rear case 13. The front housing 11 and the rear housing 13 cooperate to form a closed accommodating space for accommodating the main circuit board 20 and the noise reduction structure 30 therein. The front housing 11 is provided with an opening 110 to expose a portion of the noise reduction structure 30. In at least one embodiment of the present invention, the main circuit board 20 may be provided with various high-power electronic components, such as a central processing unit (Central Processing Unit, CPU), a memory, a hard disk, etc., which may generate a lot of heat and noise during operation.

The noise reduction structure 30 is embedded in the front housing 11. In at least one embodiment of the present invention, the noise reduction structure 30 has a thickness of 10 cm. The noise reduction structure 30 is a hollow housing that includes a first surface 32 and a second surface 34. The first surface 32 has a substantially rectangular parallelepiped configuration. The first surface 32 is arranged coplanar with the surface of the front housing 11. The first surface 32 is provided with a plurality of hollowed-out portions 321. The hollowed-out parts 321 are arranged in a matrix. The number of the hollowed-out portions 321 in the odd columns is greater than the number of the hollowed-out portions 321 in the even columns. In at least one embodiment of the present invention, the hollowed-out portion 321 has a circular structure. The diameter of the hollowed-out part 321 is 9.6 mm. In other embodiments, the hollowed-out portion 321 may have other shapes, such as triangle, square, honeycomb, oval, and other polygons.

Referring to fig. 3 and 4, the second surface 34 is disposed between the first surface 32 and the rear housing 13. The first surface 32 is spaced a predetermined distance from the second surface 34. The predetermined distance is less than a thickness of the noise reduction structure. The second surface 34 has a substantially rectangular parallelepiped structure, and is disposed at equal size and opposite to the first surface 32. The second surface 34 includes four edge portions 341, a plurality of connecting portions 342, a plurality of shielding portions 345, and a plurality of retaining walls 347.

Four of the edge portions 341 are connected end to form a frame structure, and are connected to edges of the first surface 32. In at least one embodiment of the present invention, the edge portion 341 has a rectangular parallelepiped structure.

The connection portion 342 is connected between the shielding portions 345 or between the shielding portions 345 and the edge portion 341, for fixing the shielding portions 345 to the edge portion, and further increasing the strength of the shielding portions 345. In at least one embodiment of the present invention, the connection portion 342 connected to the shielding portion 345 and the edge portion 341 has a V-shape, and the connection portion 342 connected between the shielding portions 345 has a Y-shape. In other embodiments, the connection portion 345 may have other shapes, such as, but not limited to, a shape of a snow, a shape of a rice, and the like.

The shielding portions 345 are arranged in a matrix. The shielding portion 345 adjacent to the edge portion 341 is connected to the edge portion 341 through the connection portion 342, and the shielding portion 345 distant from the edge portion 341 is connected to each other through at least one connection portion 342. In at least one embodiment of the present invention, each of the shielding portions 345 is connected with three of the edge portions 341. The shielding portion 345 is disposed opposite to the hollowed-out portion 321. That is, the projection of the shielding portion 345 on the first surface 32 is completely overlapped with the hollowed-out portion 321. A plurality of cavities 346 are formed between the connecting portion 342 and the shielding portion 345. The cavity 346 is communicated with the hollow portion 321 to form a heat dissipation channel. The cavity 346 is completely blocked by the first surface 32 when seen from the direction perpendicular to the first surface 32, and the blocking portion 345 is completely exposed through the hollowed-out portion 321, so as to avoid the internal structure of the electronic device 1 from being seen. The thickness of the shielding portion 345 is the same as the thickness of the edge portion 341.

The retaining wall 347 is disposed overlapping the shielding portion 345 and located between the shielding portion 345 and the rear housing 13. The retaining wall 347 is hollow and defines a noise reduction flow path 349. The noise reduction flow path 349 extends in a direction perpendicular to the second surface 34. Noise passing through the noise reduction flow channel 349 collides back and forth in the noise reduction flow channel 349 to form a sound absorption effect so as to improve the noise reduction effect. In at least one embodiment of the present invention, the retaining wall 347 is a hollow annular structure. In other embodiments, the shape of the retaining wall 347 may be changed as desired, for example, the retaining wall 347 may be a hemispherical, spherical or polyhedral hollow structure. In at least one embodiment of the present invention, the connecting portion 342, the shielding portion 345 and the retaining wall 347 are integrally formed and made of plastic material. The height of the retaining wall 347 is in the range of 4 mm to 7 mm. Namely, the depth of the noise reduction flow channel ranges from 4 mm to 7 mm. Turbulence is further generated in the noise reduction flow passage 349, so as to reduce the flow resistance of the noise reduction structure 30, thereby improving the heat dissipation effect. In at least one embodiment of the present invention, the height of the retaining wall 347 is 7 millimeters. In other embodiments, the retaining wall 347 may be made of a metal material and further contact with the metal portion of the front housing 11 to form an electrostatic discharge path, so as to perform electrostatic protection on the electronic device 1, and the retaining wall 347 may be further connected to the ground, so as to reduce electromagnetic interference. In at least one embodiment of the present invention, the ground may be the ground when actually placed, or may be an equivalent ground on the main circuit board 20.

In at least one embodiment of the present invention, a fan (not shown) is disposed between the noise reduction structure 30 and the rear housing 13, and noise generated when the fan rotates is transmitted from the rear housing 13 to the noise reduction structure 30, and is absorbed after being impacted back and forth in the noise reduction flow passage 349 formed by the shielding portion 345 and the retaining wall 347, and turbulence is generated in the noise reduction flow passage 349, so as to reduce the flow resistance of the noise reduction structure 30 and improve the heat dissipation effect of the noise reduction structure 30.

Please refer to fig. 5, which is a graph illustrating a flow resistance test of the noise reduction structure 30 under the first condition. Under the first condition, the noise reduction structure 30 is disposed in a closed space having an air inlet and an air outlet, and the noise reduction structure 30 is tested by adjusting the flow velocity of the air inlet and the height of the retaining wall 347. Wherein the first flow rate is 2 meters per second (m/s), the second flow rate is 4m/s, the third flow rate is 6m/s, the fourth flow rate is 8m/s, and the fifth flow rate is 10m/s. The first curve T0 is the magnitude of the static pressure change sensed at the air outlet without the noise reduction structure 30 between the first flow rate and the fifth flow rate. The second curve T1 is the magnitude of the static pressure change sensed at the air outlet by the noise reduction structure 30 without the retaining wall 347 between the first flow rate and the fifth flow rate. The third curve T2 is the magnitude of the static pressure change sensed at the air outlet between the first flow rate and the fifth flow rate with the height of the retaining wall 347 being 1 mm. The fourth curve T3 is the magnitude of the static pressure change sensed at the air outlet between the first flow rate and the fifth flow rate with the height of the retaining wall 347 being 2 mm. The fifth curve T4 is a magnitude of a static pressure change sensed at the air outlet between the first flow rate and the fifth flow rate with a height of the retaining wall 347 of 3 mm. The sixth curve T5 is a magnitude of a static pressure change sensed at the air outlet between the first flow rate and the fifth flow rate with a height of 4 mm of the retaining wall 347. The seventh curve T6 is a magnitude of a corresponding static pressure change between the first flow rate and the fifth flow rate, in which the height of the retaining wall 347 is 5 mm. The eighth curve T7 is a magnitude of a static pressure change sensed at the air outlet between the first flow rate and the fifth flow rate with a height of the retaining wall 347 of 6 mm. The ninth curve T8 is a magnitude of a static pressure change sensed at the air outlet between the first flow rate and the fifth flow rate with a height of 7 mm of the retaining wall 347. As can be seen from fig. 5, the static pressure change is small when the height of the retaining wall 347 is between 3 mm and 7 mm, and particularly, the static pressure change is minimal when the height of the retaining wall 347 is 7 mm, and the heat dissipation effect is the best.

Please refer to fig. 6, which is a graph illustrating the test noise under the second condition of the noise reduction structure 30. In the second condition, the noise reducing structure 30 is sandwiched between the fan and the sensor. The noise reduction structure 30 is tested by adjusting the rotational speed of the fan and the height of the retaining wall 347. Wherein the first rotational speed is 2200 revolutions per minute (revolutions per minute, RPM), the second rotational speed is 2700RPM, the third rotational speed is 3200RPM, the fourth rotational speed is 3700RPM, and the fifth rotational speed is 4200RPM. The first curve L0 is the loudness of noise without the corresponding noise reduction structure 30 between the first rotational speed and the fifth rotational speed. The second curve L1 is the corresponding noise loudness of the noise reduction structure 30 without the retaining wall 347 between the first rotational speed and the fifth rotational speed. The height of the third curve L2 is the corresponding noise loudness of 1 mm between the first rotational speed and the fifth rotational speed. The fourth curve L3 is the corresponding noise loudness of the height of the retaining wall 347 between the first rotation speed and the fifth rotation speed of 2 mm. The fifth curve L4 is a noise loudness corresponding to the height of the retaining wall 347 being 3 mm between the first rotation speed and the fifth rotation speed. The sixth curve L5 is the corresponding noise loudness of the height of the retaining wall 347 between the first rotation speed and the fifth rotation speed of 4 mm. The seventh curve L6 is the corresponding noise loudness of the height of the retaining wall 347 between the first rotation speed and the fifth rotation speed of 5 mm. The eighth curve L7 is the loudness of noise corresponding to the height of the retaining wall 347 being 6 mm between the first rotation speed and the fifth rotation speed. The ninth curve L8 is the corresponding noise loudness of the height of the retaining wall 347 between the first rotation speed and the fifth rotation speed of 7 mm. As can be seen in fig. 6, the wall 347 has a good noise reduction effect at a height of between 3 mm and 7 mm, particularly at a height of 7 mm, at medium and high rotational speeds.

Above-mentioned structure 30 and have and fall electronic device 1 of structure 30 of making an uproar fall, through setting up the phase-staggered arrangement fretwork portion 321 with shelter from portion 345 can improve the radiating effect, and through setting up hollow barricade 347 with shelter from portion 345 cooperation formation fall the runner 349 of making an uproar can fall electronic device 1, and then improve the use impression of electronic device 1.

It will be appreciated by persons skilled in the art that the above embodiments have been provided for the purpose of illustrating the invention and are not to be construed as limiting the invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims

1. The utility model provides a structure of making an uproar falls which characterized in that: the embedded front shell is arranged in the front shell of the electronic device; the noise reduction structure is a hollow shell, which comprises:

a first surface disposed coplanar with the front housing;

each retaining wall is overlapped with the shielding part and is positioned between the shielding part and the rear shell; the retaining wall is of a hollow structure; each retaining wall and the corresponding shielding part form a noise reduction flow channel, and noise is absorbed after impacting back and forth in the noise reduction flow channel;

the second surface further comprises a plurality of connecting parts, the connecting parts are connected among a plurality of shielding parts, and a cavity is formed between the connecting parts and the shielding parts;

the first surface is provided with a plurality of hollowed-out parts, and the cavity is communicated with the hollowed-out parts.

2. The noise reducing structure of claim 1, wherein: the second surface further includes four edge portions; the four edge radicals are connected with each other to form a hollow frame; the shielding parts positioned at the edge are connected with the edge part through at least one connecting part, and other shielding parts are connected with each other through at least one connecting part; the thickness of the shielding part is the same as that of the edge part.

3. The noise reducing structure of claim 2, wherein: the hollow parts are uniformly arranged; each hollowed-out part corresponds to one shielding part; the shielding part is completely exposed relative to the hollowed-out part; the hollowed-out part and the cavity form a heat dissipation flow channel.

4. A noise reducing structure as defined in claim 3, wherein: the hollowed-out parts are arranged in a matrix; the number of the hollowed-out parts of the odd columns is greater than that of the hollowed-out parts of the even columns.

5. The noise reducing structure of claim 1, wherein: the retaining wall is of a hollow annular structure, and the thickness range of the retaining wall is 3-7 mm.

6. An electronic device with noise reduction structure, characterized in that: the electronic device comprises a front shell, a noise reduction structure and a rear shell; the front shell and the rear shell are matched to form an accommodating space so as to accommodate the noise reduction structure in the accommodating space; the front housing has an opening; the noise reduction structure is embedded in the front shell and exposed through the opening; the noise reduction structure is a hollow shell, which comprises:

a first surface disposed coplanar with the front housing;

7. The electronic device of claim 6, wherein: the second surface further includes four edge portions; the four edge radicals are connected with each other to form a hollow frame; the shielding parts positioned at the edge are connected with the edge part through at least one connecting part, and other shielding parts are connected with each other through at least one connecting part; the thickness of the shielding part is the same as that of the edge part.

8. The electronic device of claim 7, wherein: the hollow parts are uniformly arranged; each hollowed-out part corresponds to one shielding part; the shielding part is completely exposed relative to the hollowed-out part; the hollowed-out part and the cavity form a heat dissipation flow channel.

9. The electronic device of claim 8, wherein: the hollowed-out parts are arranged in a matrix; the number of the hollowed-out parts of the odd columns is greater than that of the hollowed-out parts of the even columns.

10. The electronic device of claim 6, wherein: the retaining wall is of a hollow annular structure, and the thickness range of the retaining wall is 3-7 mm.