CN217011059U

CN217011059U - Noise reduction device for network communication equipment

Info

Publication number: CN217011059U
Application number: CN202220608473.XU
Authority: CN
Inventors: 郭盈盈
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-07-19
Anticipated expiration: 2032-03-21

Abstract

The utility model discloses a noise reduction device for network communication equipment, which comprises a protection box, wherein a fixing unit is arranged in an inner cavity of the protection box, and an installation plate for installing a communication module is connected to the fixing unit in a sliding manner; the side wall of the protection box is provided with a ventilation assembly; the surface of the inner cavity of the protection box is laid with a noise reduction layer; the fixing unit comprises slide rails which are arranged on two sides of the inner cavity of the protective box in parallel, and the mounting plate is connected between the two slide rails in a sliding manner; vibration damping components are respectively arranged between the bottom surface and the top surface of the front end and the rear end of the slide rail and the inner cavity of the protection box; a locking module is arranged between the sliding rail and the mounting plate; the locking module comprises an automatic ejecting device and an automatic locking device. The utility model has simple structure, convenient use, convenient installation and maintenance of the communication module, good heat dissipation and good damping effect, effectively reduces the noise pollution of the communication module to the outside, organically combines the functions of noise reduction and heat dissipation, and improves the service life of the communication module.

Description

Noise reduction device for network communication equipment

Technical Field

The utility model relates to the technical field of communication equipment, in particular to a noise reduction device for network communication equipment.

Background

The communication equipment, ICD for short, is used for wired communication equipment and wireless communication equipment in industrial control environment. The wired communication equipment mainly introduces equipment for solving serial port communication, professional bus type communication, industrial Ethernet communication and conversion among various communication protocols in industrial fields, and the wireless communication equipment mainly comprises wireless AP, a wireless network bridge, a wireless network card, a wireless lightning arrester, an antenna and the like.

The traditional noise reduction device for the communication equipment has a simple structure, only plays a role of blocking and has a poor noise reduction effect; meanwhile, the operation of the existing communication equipment can generate a large amount of heat to influence the normal operation of the equipment, the noise reduction function of the existing communication equipment with good heat dissipation performance is weak, the heat dissipation performance of the existing communication equipment with good noise function is weak, and the functions of the existing communication equipment and the noise reduction function can not be perfectly integrated. Therefore, there is a need for a device that combines noise reduction and heat dissipation.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a noise reduction apparatus for a network communication device, so as to solve the above problems in the prior art.

In order to achieve the purpose, the utility model provides the following scheme: the utility model provides a noise reduction device for network communication equipment, which comprises a protection box, wherein a fixing unit is arranged in an inner cavity of the protection box, and an installation plate for installing a communication module is connected to the fixing unit in a sliding manner;

the side wall of the protection box is provided with a ventilation assembly; the surface of the inner cavity of the protection box is laid with a noise reduction layer;

the fixing unit comprises slide rails which are arranged on two sides of the inner cavity of the protection box in parallel, and the mounting plate is connected between the two slide rails in a sliding manner; vibration damping components are respectively arranged between the bottom surface and the top surface of the front end and the rear end of the slide rail and the inner cavity of the protection box; a locking module is arranged between the sliding rail and the mounting plate;

the locking module comprises an automatic ejecting device and an automatic locking device.

Preferably, the vibration reduction assembly comprises a telescopic rod, and two ends of the telescopic rod are fixedly connected with the slide rail and an inner cavity in the protection box respectively; a damping spring is sleeved outside the telescopic rod, and two ends of the damping spring are fixedly connected with the slide rail and an inner cavity in the protection box respectively; the damping spring is in a compressed state.

Preferably, the automatic ejecting device comprises a sliding block connected in the sliding rail in a sliding manner, and an ejecting spring is fixedly connected between the sliding block and a sealing plate at the tail end of the sliding rail; one end of the sliding block, which is far away from the pop-up spring, is abutted against the mounting plate.

Preferably, the automatic locking device comprises a locking component and an unlocking component which are correspondingly arranged; the locking assembly is arranged between the mounting plate and the slide rail, and the unlocking assembly is arranged on the bottom surface of the slide rail.

Preferably, the locking assembly comprises a self-locking hole correspondingly formed at the bottom end of the mounting plate and a clamping hole penetrating through the bottom surface of the sliding rail; a locking clamping block is connected in the self-locking hole in a sliding mode, and a locking spring is connected between the locking clamping block and the bottom of the self-locking hole; the locking clamping block is matched with the clamping hole, and the unlocking assembly is detachably connected with the locking clamping block.

Preferably, the unlocking assembly comprises a protective shell fixedly connected to the bottom end of the sliding rail, a pushing block is slidably connected to the protective shell, an unlocking block is fixedly connected to the top end of the pushing block, the unlocking block is slidably connected to the clamping hole, and the unlocking block is detachably connected to the locking clamping block; and the unlocking block is sleeved with a return spring, and two ends of the return spring are fixedly connected with the bottom end of the sliding rail and the top end of the pushing block respectively.

Preferably, the mounting plate comprises a sliding plate which is connected between the two sliding rails in a sliding manner, the noise reduction layer is laid on the top surface of the sliding plate, and the communication module is mounted at the top end of the noise reduction layer; the two ends of the sliding plate are fixedly connected with limiting blocks respectively, the opposite edges of the two limiting blocks are fixedly connected with one end of a limiting rod, the other end of the limiting rod is fixedly connected with a sound insulation plate, sound absorption cotton is laid on the surface of the sound insulation plate, and the sound absorption cotton is abutted to the side wall of the communication module; the limiting spring is sleeved on the limiting rod, and two ends of the limiting spring are fixedly connected with the limiting block and the sound insulation board respectively.

Preferably, the ventilation assembly comprises ventilation holes respectively arranged at two sides of the protection box, an isolation net is fixedly embedded in each ventilation hole, and a ventilation fan is arranged in each ventilation hole and is arranged at the inner side of each ventilation hole.

The utility model discloses the following technical effects: the utility model discloses a noise reduction device for network communication equipment.A noise reduction layer is laid on the side wall of an inner cavity of a protection box, so that the noise generated by a communication module can be effectively absorbed, the noise volume transmitted from the protection box is reduced, and the influence of the noise on the surrounding environment is reduced; the ventilation components are arranged on the two sides of the protection box, so that the ventilation in the protection box can be realized, heat generated by the operation of the communication module is discharged, the temperature in the protection box is reduced, the communication module is prevented from being damaged due to overhigh temperature, the service life of the communication module is prolonged, meanwhile, the ventilation components can prevent dust and water vapor from entering the protection box, the dust deposition of the communication module is reduced, the noise volume of the communication module due to the dust deposition is reduced, and the noise of the device is further reduced; the communication module is connected to the sliding rail in a sliding mode through the mounting plate, and the sliding rail is provided with the vibration reduction assembly, so that vibration generated by the operation of elements in the operation process of the communication module is effectively absorbed, and further noise generated by the vibration is reduced; the automatic ejection device and the automatic locking device are arranged, so that the mounting plate and the sliding rail can be conveniently fixed and separated, and the communication module can be conveniently mounted and maintained. The utility model has simple structure, convenient use, convenient installation and maintenance of the communication module, good heat dissipation and good damping effect, effectively reduces the noise pollution of the communication module to the outside, organically combines the functions of noise reduction and heat dissipation, and improves the service life of the communication module.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is an axial view of a noise reducer for a network communication device according to the present invention;

FIG. 2 is a front view of a noise reduction device for a network communication apparatus according to the present invention;

FIG. 3 is a schematic structural view of a noise reduction device for a network communication apparatus according to the present invention;

FIG. 4 is a partial enlarged view of A in FIG. 2;

FIG. 5 is a schematic structural diagram of a locking module according to the present invention;

FIG. 6 is a partial enlarged view of B in FIG. 5;

wherein, 1, a protection box; 2. a communication module; 3. mounting a plate; 4. a noise reduction layer; 5. a slide rail; 6. a telescopic rod; 7. a damping spring; 8. a slider; 9. closing the plate; 10. ejecting a spring; 11. self-locking holes; 12. a clamping hole; 13. locking the clamping block; 14. locking the spring; 15. a protective shell; 16. a push block; 17. unlocking the block; 18. a return spring; 19. a slide plate; 20. a limiting block; 21. a limiting rod; 22. a sound insulating board; 23. sound-absorbing cotton; 24. a limiting spring; 25. a ventilation hole; 26. an isolation net; 27. a ventilation fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-6, the utility model provides a noise reduction device for network communication equipment, which comprises a protection box 1, wherein a fixing unit is arranged in an inner cavity of the protection box 1, and an installation plate 3 for installing a communication module 2 is connected to the fixing unit in a sliding manner;

the side wall of the protection box 1 is provided with a ventilation assembly; the surface of the inner cavity of the protection box 1 is laid with a noise reduction layer 4;

the fixing unit comprises slide rails 5 which are arranged on two sides of the inner cavity of the protective box 1 in parallel, and the mounting plate 3 is connected between the two slide rails 5 in a sliding manner; damping components are respectively arranged between the bottom surface and the top surface of the front end and the back end of the slide rail 5 and the inner cavity of the protection box 1; a locking module is arranged between the sliding rail 5 and the mounting plate 3;

The utility model discloses a noise reduction device for network communication equipment.A noise reduction layer 4 is laid on the side wall of an inner cavity of a protection box 1, so that the noise generated by a communication module 2 can be effectively absorbed, the noise volume transmitted from the protection box 1 is reduced, and the influence of the noise on the surrounding environment is reduced; the ventilation assemblies are arranged on two sides of the protection box 1, can ventilate the protection box 1, can discharge heat generated by operation of the communication module 2, reduce the temperature in the protection box 1, prevent the communication module 2 from being damaged due to overhigh temperature, prolong the service life of the communication module 2, and can prevent external dust and water vapor from entering the protection box 1, reduce dust deposition of the communication module 2, reduce the noise volume of the communication module 2 due to dust deposition and further reduce the noise of the device; the communication module 2 is connected to a slide rail 5 in a sliding manner through a mounting plate 3, and a vibration damping assembly is arranged on the slide rail 5, so that vibration generated by the operation of elements in the operation process of the communication module 2 is effectively absorbed, and further, the noise generated by the vibration is reduced; the automatic popping device and the automatic locking device are arranged, so that the mounting plate 3 and the sliding rail 5 can be conveniently fixed and separated, and the communication module 2 can be conveniently mounted and maintained.

According to a further optimized scheme, the vibration reduction assembly comprises a telescopic rod 6, and two ends of the telescopic rod 6 are fixedly connected with the slide rail 5 and an inner cavity in the protection box 1 respectively; a damping spring 7 is sleeved outside the telescopic rod 6, and two ends of the damping spring 7 are fixedly connected with the slide rail 5 and an inner cavity in the protection box 1 respectively; the damper spring 7 is in a compressed state. The telescopic rod 6 has a limiting effect, the vibration direction of the slide rail 5 is limited in the vertical direction, and meanwhile, when the vibration damping spring 7 sleeved on the telescopic rod 6 drives the mounting plate 3 to vibrate when the communication module 2 operates to vibrate naturally, the vibration is reduced by stretching up and down and is transmitted to the protection box 1, so that the noise generated by the self vibration of the communication module 2 is reduced, and the noise pollution to the outside is further reduced; the damping spring 7 is in a compressed state at all times, and the upper part and the lower part are matched to complete the support of the slide rail 5.

According to a further optimized scheme, the automatic ejecting device comprises a sliding block 8 which is connected in the sliding rail 5 in a sliding mode, and an ejecting spring 10 is fixedly connected between the sliding block 8 and a sealing plate 9 at the tail end of the sliding rail 5; the end of the slider 8 remote from the ejection spring 10 abuts the mounting plate 3. When the device is installed, the installation plate 3 slides in the box protection box 1 along the slide rail 5, the slide block 8 is pushed to move in the box protection box 1, and the pop-up spring 10 is compressed; when the mounting plate 3 is pushed to a certain degree, the automatic locking device locks and positions the mounting plate 3 to complete the mounting; when the mounting plate 3 is detached, the automatic locking device is released, the pushing spring rebounds, the mounting plate 3 is pushed out of the sliding rail 5 through the sliding block 8, and the mounting plate 3 is automatically popped out.

According to a further optimized scheme, the automatic locking device comprises a locking assembly and an unlocking assembly which are correspondingly arranged; the locking assembly is arranged between the mounting plate 3 and the slide rail 5, and the unlocking assembly is arranged on the bottom surface of the slide rail 5; the locking assembly comprises a self-locking hole 11 correspondingly formed at the bottom end of the mounting plate 3 and a clamping hole 12 penetrating the bottom surface of the sliding rail 5; a locking fixture block 13 is slidably connected in the self-locking hole 11, and a locking spring 14 is connected between the locking fixture block 13 and the bottom of the self-locking hole 11; the locking clamping block 13 is matched with the clamping hole 12, and the unlocking assembly is detachably connected with the locking clamping block 13; the unlocking assembly comprises a protective shell 15 fixedly connected to the bottom end of the sliding rail 5, a pushing block 16 is connected in the protective shell 15 in a sliding mode, an unlocking block 17 is fixedly connected to the top end of the pushing block 16, the unlocking block 17 is connected with the clamping hole 12 in a sliding mode, and the unlocking block 17 is detachably connected with the locking clamping block 13; the unlocking block 17 is externally sleeved with a return spring 18, and two ends of the return spring 18 are respectively fixedly connected with the bottom end of the sliding rail 5 and the top end of the push block 16. When the mounting plate 3 is installed, the mounting plate slides inwards along the sliding rail 5 until the self-locking hole 11 and the clamping hole 12 are aligned, and the locking spring 14 pushes the locking clamping block 13 to be clamped into the clamping hole 12, so that the mounting plate 3 is locked; when the mounting plate 3 is taken out, the unlocking block 17 is pushed upwards through the pushing block 16, the locking clamping block 13 is pushed out of the clamping hole 12, the mounting plate 3 is popped outwards under the action of the popping spring 10, the mounting plate 3 is dismounted, the pushing block 16 is loosened, and the resetting spring 18 pushes the pushing block 16 to reset; the protective housing 15 is used for preventing the installation plate 3 from popping up due to mistaken touch of the push block 16, so that the use is influenced, meanwhile, the push block 16 can be limited, and the unlocking block 17 is prevented from being separated.

According to a further optimization scheme, the mounting plate 3 comprises a sliding plate 19 connected between the two sliding rails 5 in a sliding mode, a noise reduction layer 4 is laid on the top surface of the sliding plate 19, and the communication module 2 is mounted at the top end of the noise reduction layer 4; two ends of the sliding plate 19 are fixedly connected with limit blocks 20 respectively, opposite edges of the two limit blocks 20 are fixedly connected with one end of a limit rod 21, the other end of the limit rod 21 is fixedly connected with a sound insulation plate 22, the surface of the sound insulation plate 22 is laid with sound absorption cotton 23, and the sound absorption cotton 23 is abutted against the side wall of the communication module 2; the limiting rod 21 is sleeved with a limiting spring 24, and two ends of the limiting spring 24 are respectively fixedly connected with the limiting block 20 and the sound insulation board 22. The communication module 2 is arranged on the drawing board on which the noise reduction layer 4 is laid, and vibration generated by operation is absorbed by the noise reduction layer 4, so that the influence on the external noise is reduced; the limiting blocks 20 on the two sides are symmetrically arranged, the communication module 2 is positioned through the telescopic rod 6 and the sound insulation board 22, and meanwhile, the vibration generated by the communication module 2 is absorbed by the telescopic of the limiting spring 24 and the limiting rod 21, so that the noise generated by the vibration in the left and right directions is reduced; the sound-absorbing cotton 23 laid on the surface of the sound-insulating board 22 has better sound-insulating, sound-absorbing and vibration-damping effects, and further reduces the noise generated by vibration.

According to the further optimization scheme, the ventilation assembly comprises ventilation holes 25 which are respectively arranged on two sides of the protection box 1, an isolation net 26 is fixedly embedded in each ventilation hole 25, a ventilation fan 27 is arranged in each ventilation hole 25, and each ventilation fan 27 is arranged on the inner side of each ventilation hole 25. The isolation net 26 has the dustproof and moisture absorption functions, can ensure the dryness in the protection box 1, and simultaneously reduces the dust deposition of the communication module 2 caused by the external dust entering the protection box 1; the known 2 deposition of communication module of technical skill in the art can lead to communication module 2 heat dissipation difficulty and abnormal vibration, and high temperature and vibration also can increase the intensity of noise, therefore the scavenger fan 27 of this application can accelerate taking a breath in the guard box 1, dispels the heat with higher speed, prevents that communication module 2 high temperature is impaired, can reduce the noise that communication module 2 produced more, further improves the ability of making an uproar that falls of this application.

The using method comprises the following steps:

fixing the communication module 2 to a corresponding position of the mounting plate 3, wherein a wiring port of the communication module 2 faces the inner side of the mounting plate 3; the mounting plate 3 is drawn into the slide rail 5 and pushed into the protection box 1 until the self-locking hole 11 is aligned with the locking hole, the locking fixture block 13 is clamped into the fixture hole 12 under the pushing of the locking spring 14, and the mounting plate 3 and the slide rail 5 are firmly fixed under the action of the slide block 8 and the locking fixture block 13.

When the communication module 2 operates, the ventilation fans 27 on the two sides are started, one air inlet and one air exhaust are performed to form convection, heat generated by the operation of the communication module 2 is quickly exhausted out of the protection box 1, and abnormal operation caused by high temperature of the communication module 2 is prevented, the isolation net 26 embedded in the ventilation holes 25 can prevent external dust and water vapor from entering the protection box 1, so that slow heat dissipation caused by dust deposition of the communication module 2 is prevented, abnormal vibration caused by dust deposition is reduced, and the intensity of noise is reduced; normal vibration of internal components when the communication module 2 is in operation; the left and right vibration is absorbed by the sound insulation board 22 fixedly connected at the tail end of the limiting rod 21 under the action of the limiting block 20 and the limiting spring 24, and the sound absorption effect of the sound insulation board 22 is enhanced by the sound absorption cotton 23 on the surface of the sound insulation board 22; noise and vibration of upper and lower direction are absorbed by the layer 4 of making an uproar that falls on mounting panel 3 surface earlier, and remaining vibration is reduced by the combination of telescopic link 6 and damping spring 7, reduces the noise that the vibration produced, and the layer 4 of making an uproar that falls that lays of guard box 1 inner wall simultaneously can effectively reduce the noise in the guard box 1 and spread, has reduced the noise pollution to the external world.

When the communication module 2 is taken out, the communication module 2 is closed firstly, then the protection box 1 is opened, the pushing block 16 in the protection shell 15 below the sliding rail 5 is pushed upwards, the unlocking block 17 is pushed to push the locking clamping block 13 out of the clamping hole 12, and after the mounting plate 3 loses the limit, the sliding plate 19 pushes the mounting plate 3 out of the sliding rail 5 under the pushing of the pushing spring, so that the mounting plate 3 can be taken down easily.

The utility model has simple structure, convenient use, convenient installation and maintenance of the communication module 2, good heat dissipation and good shock absorption effect, effectively reduces the noise pollution of the communication module 2 to the outside, organically combines the functions of noise reduction and heat dissipation, and improves the service life of the communication module 2.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A noise reduction device for a network communication device, characterized in that: the protection box comprises a protection box (1), wherein a fixing unit is arranged in an inner cavity of the protection box (1), and a mounting plate (3) for mounting a communication module (2) is connected to the fixing unit in a sliding manner;

the side wall of the protection box (1) is provided with a ventilation assembly; the surface of the inner cavity of the protection box (1) is laid with a noise reduction layer (4);

the fixing unit comprises sliding rails (5) which are arranged on two sides of an inner cavity of the protection box (1) in parallel, and the mounting plate (3) is connected between the two sliding rails (5) in a sliding manner; damping components are respectively arranged between the bottom surface and the top surface of the front end and the back end of the slide rail (5) and the inner cavity of the protection box (1); a locking module is arranged between the sliding rail (5) and the mounting plate (3);

2. The noise reduction apparatus for a network communication device according to claim 1, wherein: the damping assembly comprises a telescopic rod (6), and two ends of the telescopic rod (6) are fixedly connected with the slide rail (5) and an inner cavity in the protection box (1) respectively; a damping spring (7) is sleeved outside the telescopic rod (6), and two ends of the damping spring (7) are fixedly connected with the slide rail (5) and an inner cavity in the protection box (1) respectively; the damping spring (7) is in a compressed state.

3. The noise reduction apparatus for a network communication device according to claim 1, wherein: the automatic ejecting device comprises a sliding block (8) which is connected in the sliding rail (5) in a sliding manner, and an ejecting spring (10) is fixedly connected between the sliding block (8) and a sealing plate (9) at the tail end of the sliding rail (5); one end, far away from the pop-up spring (10), of the sliding block (8) is abutted to the mounting plate (3).

4. The noise reduction apparatus for a network communication device according to claim 1, wherein: the automatic locking device comprises a locking component and an unlocking component which are correspondingly arranged; the locking assembly is arranged between the mounting plate (3) and the sliding rail (5), and the unlocking assembly is arranged on the bottom surface of the sliding rail (5).

5. The noise reduction apparatus for a network communication device according to claim 4, wherein: the locking assembly comprises a self-locking hole (11) correspondingly formed at the bottom end of the mounting plate (3) and a clamping hole (12) penetrating through the bottom surface of the sliding rail (5); a locking clamping block (13) is connected in the self-locking hole (11) in a sliding manner, and a locking spring (14) is connected between the locking clamping block (13) and the bottom of the self-locking hole (11); the locking clamping block (13) is matched with the clamping hole (12), and the unlocking assembly is detachably connected with the locking clamping block (13).

6. The noise reduction apparatus for a network communication device according to claim 5, wherein: the unlocking assembly comprises a protective shell (15) fixedly connected to the bottom end of the sliding rail (5), a pushing block (16) is connected to the protective shell (15) in a sliding mode, an unlocking block (17) is fixedly connected to the top end of the pushing block (16), the unlocking block (17) is connected with the clamping hole (12) in a sliding mode, and the unlocking block (17) is detachably connected with the locking clamping block (13); and a return spring (18) is sleeved outside the unlocking block (17), and two ends of the return spring (18) are respectively fixedly connected with the bottom end of the sliding rail (5) and the top end of the push block (16).

7. The noise reduction apparatus for a network communication device according to claim 1, wherein: the mounting plate (3) comprises a sliding plate (19) which is connected between the two sliding rails (5) in a sliding manner, the noise reduction layer (4) is laid on the top surface of the sliding plate (19), and the communication module (2) is mounted at the top end of the noise reduction layer (4); two ends of the sliding plate (19) are fixedly connected with limiting blocks (20) respectively, opposite sides of the two limiting blocks (20) are fixedly connected with one end of a limiting rod (21), the other end of the limiting rod (21) is fixedly connected with a sound insulation plate (22), sound absorption cotton (23) is laid on the surface of the sound insulation plate (22), and the sound absorption cotton (23) is abutted to the side wall of the communication module (2); the limiting spring (24) is sleeved on the limiting rod (21), and two ends of the limiting spring (24) are fixedly connected with the limiting block (20) and the sound insulation board (22) respectively.

8. The noise reduction apparatus for a network communication device according to claim 1, wherein: the ventilation assembly comprises ventilation holes (25) which are respectively arranged at two sides of the protection box (1), an isolation net (26) is fixedly embedded in each ventilation hole (25), a ventilation fan (27) is arranged in each ventilation hole (25), and each ventilation fan (27) is arranged on the inner side of each ventilation hole (25).