CN214620032U - Noise reduction device and rack air conditioner - Google Patents
Noise reduction device and rack air conditioner Download PDFInfo
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- CN214620032U CN214620032U CN202022945084.XU CN202022945084U CN214620032U CN 214620032 U CN214620032 U CN 214620032U CN 202022945084 U CN202022945084 U CN 202022945084U CN 214620032 U CN214620032 U CN 214620032U
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Abstract
The utility model discloses a noise reduction device and a frame air conditioner; the noise reduction device comprises a mounting plate, a first noise reduction assembly and a second noise reduction plate; the first noise reduction assembly comprises a bottom inner noise reduction plate and a bottom outer noise reduction plate; the noise generated by a noise source is reflected to the bottom outer side noise reduction plate through the second noise reduction plate, so that the noise is continuously rebounded between the second noise reduction plate and the bottom outer side noise reduction plate, and in the process, the sound radiation paths of the noise are all positioned in the first noise radiation space, and the effect of reducing the noise for the first time is achieved; part of noise passes through the noise reduction plate on the outer side of the bottom to enter the second sound radiation space, so that the noise is continuously rebounded in the second sound radiation space, and in the process, the radiation paths of the noise are all positioned in the second sound radiation space, and the effect of secondary noise reduction is achieved; therefore, the noise reduction device is arranged in a limited space, and a first sound radiation space and a second sound radiation space are formed, so that the radiation path of noise is prolonged, and the noise reduction effect of the noise reduction device and the rack air conditioner is improved.
Description
Technical Field
The utility model relates to a field of making an uproar falls in the fan especially relates to a device and frame air conditioner of making an uproar falls.
Background
The frame air conditioner is mainly applied to indoor temperature regulation scenes, adopts an integrated machine body structure design, is internally provided with components such as a fan, a radiating pipe and the like, has the functions of large air quantity, high sensible heat, high-efficiency filtration, network control and the like, and meets the radiating requirement of high-load long-time continuous operation of a machine room.
A rack air conditioner in the prior art is shown in fig. 1, and adopts a conventional fan installation mode, wherein a fan is installed on a fan fixing plate (a straight fixing plate), so that a blade of the fan can rotate relative to a rack; the noise reduction mode mainly realizes the noise reduction effect by sticking cotton noise reduction on the inner surface of the shell of the whole machine.
However, since the rack air conditioner is mainly applied to indoor environments such as a machine room, there is a certain limit to the overall size of the rack air conditioner; for the rack air conditioner shown in fig. 1, the air outlet is very close to the sound source of the fan, and the sound wave diffusion range of the fan is large, so that the whole noise of the rack air conditioner in the prior art is extremely large due to the fact that the noise can be reduced only by cotton pasting on the premise that the whole size of the rack air conditioner is limited, and the whole noise reduction effect is not obvious.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device and frame air conditioner of making an uproar falls solves the very big problem of whole noise of present frame air conditioner.
To achieve the purpose, the utility model adopts the following technical proposal:
a noise reducing device comprises a mounting plate and a first noise reducing assembly;
the first noise reduction assembly comprises a bottom inner noise reduction plate and two bottom outer noise reduction plates which are respectively arranged at two ends of the bottom inner noise reduction plate; the noise reduction plate on the inner side of the bottom and the mounting plate are arranged at intervals, and a noise source mounting space is formed between the noise reduction plate and the mounting plate; two ends of the mounting plate are respectively provided with a second noise reduction plate;
the second noise reduction plate positioned at the same side of the noise source installation space and the noise reduction plate at the outer side of the bottom are arranged in a surrounding mode to form a first noise radiation space; wherein the second noise reduction plate is inclined at a predetermined inclination angle toward a direction close to the noise source installation space;
and the bottom inner side noise reduction plate and the two bottom outer side noise reduction plates are arranged on one side far away from the noise source installation space in a surrounding manner to form a second noise radiation space.
Optionally, the mounting plate includes a first mounting plate and two second mounting plates fixedly disposed at two ends of the first mounting plate, respectively;
the bottom outer noise reduction plate comprises a bottom outer noise reduction cotton layer and a bottom outer sound absorption layer which are sequentially arranged along the direction close to the second noise reduction plate;
the second noise reduction plate comprises a second noise reduction cotton layer and a second sound absorption layer; the second falls the cotton layer of making an uproar with the second sound absorption layer stack in proper order on the second mounting panel.
Optionally, a third noise reduction plate is disposed between the first mounting plate and the bottom inner noise reduction plate;
the third noise reduction plate comprises a third noise reduction cotton layer and a third sound absorption layer which are sequentially arranged along the direction close to the first mounting plate;
a supporting seat side plate is arranged between the third sound absorption layer and the first mounting plate, one end of the supporting seat side plate is fixedly connected with the third sound absorption layer, and the other end of the supporting seat side plate is fixedly connected with the first mounting plate;
and a third noise radiation space is formed between the bottom inner noise reduction plate and the third noise reduction plate.
Optionally, the bottom inner noise reduction plate comprises a bottom inner noise reduction cotton layer and a bottom inner noise absorption layer which are sequentially arranged in the direction close to the mounting plate.
Optionally, the third noise reduction plate is provided with a mounting hole for mounting a noise source.
Optionally, the bottom inner side noise reduction cotton layer and the bottom outer side noise reduction cotton layer are integrally formed to form a first noise reduction cotton layer; the bottom inner side sound absorption layer and the bottom outer side sound absorption layer are integrally formed to form a first sound absorption layer;
the sound absorption coefficients of the first noise reduction cotton layer, the second noise reduction cotton layer and the third noise reduction cotton layer are respectively the same;
the first sound absorption layer, the second sound absorption layer and the third sound absorption layer are all provided with a plurality of through holes with the same aperture, and the corresponding aperture ratios of the first sound absorption layer, the second sound absorption layer and the third sound absorption layer are the same.
Optionally, the bottom inner side noise reduction cotton layer and the bottom outer side noise reduction cotton layer are integrally formed to form a first noise reduction cotton layer; the bottom inner side sound absorption layer and the bottom outer side sound absorption layer are integrally formed to form a first sound absorption layer;
the sound absorption coefficients corresponding to the first noise reduction cotton layer, the second noise reduction cotton layer and the third noise reduction cotton layer are different;
the first sound absorption layer is provided with a plurality of first through holes, the second sound absorption layer is provided with a plurality of second through holes, and the third sound absorption layer is provided with a plurality of third through holes; the first through hole, the second through hole and the third through hole have different diameters;
the first sound absorption layer, the second sound absorption layer and the third sound absorption layer respectively correspond to different opening rates.
Optionally, the bottom inner side noise reduction cotton layer and the bottom outer side noise reduction cotton layer are integrally formed to form a first noise reduction cotton layer; the bottom inner side sound absorption layer and the bottom outer side sound absorption layer are integrally formed to form a first sound absorption layer; the first noise reduction assembly further comprises a cover plate, the cover plate is fixedly connected with the first sound absorption layer, and the first noise reduction cotton layer is laminated on the first sound absorption layer.
A rack air conditioner comprises a rack, a noise source and the noise reduction device, wherein the noise source is arranged on a mounting plate; the noise reduction device is arranged in the frame;
the mounting panel with frame fixed connection, first fall make an uproar subassembly with frame fixed connection.
Optionally, the frame comprises a top plate; and two ends of the top plate are respectively fixedly connected with the two noise reduction plates outside the bottom.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a noise reduction device and frame air conditioner reflects the noise that the noise source produced to the bottom outside noise reduction board through the second noise reduction board, makes the noise constantly kick-back between the second noise reduction board and the bottom outside noise reduction board, and the acoustic radiation route of noise all lies in first noise radiation space in this process, plays the effect of making an uproar for the first time; part of noise passes through the noise reduction plate on the outer side of the bottom to enter the second sound radiation space, so that the noise is continuously rebounded in the second sound radiation space, and in the process, the radiation paths of the noise are all positioned in the second sound radiation space, so that the effect of reducing the noise for the second time is achieved; therefore, the noise reduction device is arranged in a limited space, a first sound radiation space and a second sound radiation space are formed, the radiation path of noise is prolonged, the noise can be rebounded and absorbed in the first sound radiation space and the second sound radiation space at the same time, and the noise reduction effect of the noise reduction device and the rack air conditioner is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
The structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the achievable purpose.
Fig. 1 is a schematic structural diagram of a rack air conditioner in the background art;
fig. 2 is a schematic perspective view of a rack air conditioner according to a second embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure view of a rack air conditioner according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a noise reduction device according to a first embodiment of the present invention;
FIG. 5 is a schematic view of a portion of the structure of FIG. 4 at A;
FIG. 6 is a schematic view of a portion of the structure of FIG. 4 at B;
FIG. 7 is a schematic view of a portion of the structure of FIG. 4 at C;
fig. 8 is a schematic noise reduction diagram of a noise reduction apparatus according to a first embodiment of the present invention;
fig. 9 is a schematic partial structural view of a noise reduction device according to an embodiment of the present invention;
fig. 10 is a schematic cross-sectional view of a part 1/4 of a noise reducer according to an embodiment of the present invention;
fig. 11 is a schematic view of an overall structure of a fan support seat according to a first embodiment of the present invention;
fig. 12 is a schematic view of an overall structure of a fan fixing plate according to a first embodiment of the present invention.
Illustration of the drawings: 1. mounting a plate; 11. a first mounting plate; 12. a second mounting plate; 2. a first noise reduction assembly; 21. a bottom inner noise reduction plate; 211. a noise reduction cotton layer at the inner side of the bottom; 212. a sound absorbing layer on the inner side of the bottom; 22. a bottom outside noise reduction plate; 221. a noise reduction cotton layer is arranged on the outer side of the bottom; 222. a sound absorbing layer outside the bottom; 23. a first noise reduction cotton layer; 24. a first sound absorbing layer; 3. a second noise reduction plate; 31. a second noise reduction cotton layer; 32. a second sound absorbing layer; 4. a third noise reduction plate; 41. a third noise reduction cotton layer; 42. a third sound absorbing layer; 5. a support seat side plate; 6. a frame; 61. a top plate; 7. a source of noise.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1 to 12, fig. 1 is a schematic structural diagram of a rack air conditioner in the background art, fig. 2 is a schematic structural diagram of a rack air conditioner in the second embodiment of the present invention, fig. 3 is a schematic structural diagram of a cross-section of the rack air conditioner in the second embodiment of the present invention, fig. 4 is a schematic structural diagram of a noise reduction device in the first embodiment of the present invention, fig. 5 is a schematic structural diagram of a part of fig. 4 at a, fig. 6 is a schematic structural diagram of a part of fig. 4 at B, fig. 7 is a schematic structural diagram of a part of fig. 4 at C, fig. 8 is a schematic structural diagram of a noise reduction device in the first embodiment of the present invention, fig. 9 is a schematic structural diagram of a part of a noise reduction device in the first embodiment of the present invention, fig. 10 is a schematic structural diagram of a part of a 1/4 cross-section of a noise reduction device in the first embodiment of the present invention, fig. 11 is a schematic structural diagram of an overall supporting seat of a fan in the first embodiment of the present invention, fig. 12 is a schematic view of an overall structure of a fan fixing plate according to a first embodiment of the present invention.
Example one
The noise reduction device provided by the embodiment is mainly installed in a rack air conditioner, is applied to an application scene of indoor temperature control heat dissipation such as machine room heat dissipation, and has excellent self-noise reduction capability, and the generation of noise can be effectively reduced.
As shown in fig. 4 and 8, the present embodiment provides a noise reducing device including a mounting plate 1 and a first noise reduction assembly 2.
The first noise reduction assembly 2 comprises a bottom inner noise reduction plate 21 and two bottom outer noise reduction plates 22 which are respectively arranged at two ends of the bottom inner noise reduction plate 21; the noise reduction plate 21 on the inner side of the bottom and the mounting plate 1 are arranged at intervals, and a noise source mounting space is formed between the noise reduction plate and the mounting plate; two ends of the mounting plate 1 are respectively provided with a second noise reduction plate 3.
The second noise reduction plate 3 and the bottom outer noise reduction plate 22 which are positioned at the same side of the noise source installation space are surrounded to form a first noise radiation space; wherein the second noise reduction plate 3 is inclined at a predetermined inclination angle toward a direction close to the noise source installation space.
The bottom inner noise reduction plate 21 and the two bottom outer noise reduction plates 22 enclose a second noise radiation space on a side away from the noise source installation space.
Specifically, the noise generated by the noise source 7 is reflected to the bottom outside noise reduction plate 22 by the second noise reduction plate 3, so that the noise is continuously rebounded between the second noise reduction plate 3 and the bottom outside noise reduction plate 22, and in the process, the sound radiation path (i.e. the sound radiation path i in fig. 8) of the noise is located in the first noise radiation space, so that the effect of reducing the noise for the first time is achieved; part of the noise passes through the bottom outer noise reduction plate 22 and enters the second sound radiation space, so that the noise continuously rebounds in the second sound radiation space, and in the process, the radiation paths of the noise (namely, the sound radiation path iii in fig. 8) are all located in the second sound radiation space, and the effect of secondary noise reduction is achieved; therefore, the noise reduction device is arranged in a limited space, a first sound radiation space and a second sound radiation space are formed, the radiation path of noise is prolonged, the noise can be rebounded and absorbed in the first sound radiation space and the second sound radiation space at the same time, and the noise reduction effect of the noise reduction device and the rack air conditioner is improved.
Further, as shown in fig. 4, 6 and 12, the mounting plate 1 includes a first mounting plate 11 and two second mounting plates 12 fixedly disposed at both ends of the first mounting plate 11, respectively.
The bottom outside noise reduction plate 22 includes a bottom outside noise reduction cotton layer 221 and a bottom outside sound absorption layer 222, which are sequentially arranged in a direction close to the second noise reduction plate 3. Therefore, when the bottom outside noise reduction plate 22 absorbs noise, noise is reduced through the bottom outside sound absorption layer 222, and noise is absorbed through the bottom outside noise reduction cotton layer 221, so that a better noise reduction effect can be achieved.
The second noise reduction panel 3 comprises a second noise reduction cotton layer 31 and a second sound absorption layer 32; the second noise reduction cotton layer 31 and the second sound absorption layer 32 are sequentially stacked on the second mounting plate 12. The noise reduction effect is also improved similarly to the structure of the bottom outside noise reduction plate 22 described above.
Further, as shown in fig. 4, 7 and 8, the noise reducing device further includes a third noise reducing plate 4 disposed between the first mounting plate 11 and the bottom inner noise reducing plate 21.
The third noise reduction plate 4 comprises a third noise reduction cotton layer 41 and a third sound absorption layer 42 arranged in sequence in a direction close to the first mounting plate 11.
A supporting seat side plate 5 is arranged between the third sound absorption layer 42 and the first mounting plate 11, one end of the supporting seat side plate 5 is fixedly connected with the third sound absorption layer 42, and the other end of the supporting seat side plate is fixedly connected with the first mounting plate 11.
A third noise radiation space is formed between the bottom inner noise reduction plate 21 and the third noise reduction plate 4.
Specifically, the third noise reduction plate 4 is disposed to absorb the noise reflected from the first noise reduction assembly 2, and the third noise reduction plate 4 and the bottom inner noise reduction plate 21 are disposed at an interval to form a third noise radiation space, the noise can rebound between the third noise reduction plate 4 and the bottom inner noise reduction plate 21, in this process, the radiation path of the noise (i.e., the sound radiation path ii in fig. 8) is located in the third sound radiation space, so that the noise can rebound continuously in the third noise radiation space, and the third noise reduction effect is achieved.
Further, as shown in fig. 4, the bottom inner noise reduction plate 21 includes a bottom inner noise reduction cotton layer 211 and a bottom inner sound absorption layer 212 which are sequentially arranged in a direction close to the mounting plate 1. Similarly, fall through the inboard acoustic absorber layer 212 in bottom earlier and fall the cotton layer 211 noise absorption that makes an uproar in rethread bottom is inboard, can reach better noise reduction effect.
Further, as shown in fig. 8 to 11, the third noise reduction plate 4 is opened with a mounting hole for mounting the noise source 7. Through the setting of mounting hole for noise source 7 can set up in the board 4 of making an uproar falls in the third, makes the vibration noise that noise source 7 during operation produced can be fallen the board 4 and absorb by the third, makes the third fall the board 4 of making an uproar and can directly fall the noise source 7 and make an uproar, improves the ability of making an uproar. It should be added that the third sound absorption layer 42 is used as a supporting seat top plate to connect with a plurality of supporting seat side plates 5, so that the supporting seat top plate is not required to be made of extra materials, the weight of the noise reduction device is reduced, the size of the noise reduction device is optimized, and the third noise radiation space is enlarged.
In one particular embodiment, as shown in fig. 4 and 5, the bottom inner noise reducing cotton layer 211 is integrally formed with the bottom outer noise reducing cotton layer 221 to form a first noise reducing cotton layer 23; the bottom inner acoustic layer 212 is integrally formed with the bottom outer acoustic layer 222 to form the first acoustic layer 24.
The sound absorption coefficients of the first noise reduction cotton layer 23, the second noise reduction cotton layer 31 and the third noise reduction cotton layer 41 are the same. Exemplarily, a plurality of through holes with the same aperture are formed in the first sound absorbing layer 24, the second sound absorbing layer 32 and the third sound absorbing layer 42, and the corresponding aperture ratios of the first sound absorbing layer 24, the second sound absorbing layer 32 and the third sound absorbing layer 42 are the same. Through the arrangement, the noise reduction device can optimally reduce noise of the noise source with fixed frequency.
In another specific embodiment, the bottom inner noise reduction cotton layer 211 is integrally formed with the bottom outer noise reduction cotton layer 221 to form the first noise reduction cotton layer 23; the bottom inner acoustic layer 212 is integrally formed with the bottom outer acoustic layer 222 to form the first acoustic layer 24.
The sound absorption coefficients of the first noise reduction cotton layer 23, the second noise reduction cotton layer 31 and the third noise reduction cotton layer 41 are different. It should be noted that, in the case that the noise source 7 is a variable frequency fan, since the rotational speed of the variable frequency fan is adjustable, the frequency and wavelength of the generated sound waves are different, and the range is wide, and the sound absorption frequency band of the sound absorption cotton is narrow, the first noise reduction cotton layer 23, the second noise reduction cotton layer 31 and the third noise reduction cotton layer 41 can be adjusted to respectively absorb the noise in different frequency bands; for example, the second noise reduction cotton layer 31 may be replaced by a glass fiber sound absorption cotton layer, and the third noise reduction cotton layer 41 may be replaced by a polyester fiber sound absorption cotton layer, so that the sound absorption parameters of the first noise reduction cotton layer 23, the second noise reduction cotton layer 31 and the third noise reduction cotton layer 41 are different; the number of the material layers in the second noise reduction cotton layer 31 and the third noise reduction cotton layer 41 can be adjusted, so that the first noise reduction cotton layer 23, the second noise reduction cotton layer 31 and the third noise reduction cotton layer 41 can absorb noise of different frequency bands respectively.
The first sound absorption layer 24 is provided with a plurality of first through holes, the second sound absorption layer 32 is provided with a plurality of second through holes, and the third sound absorption layer 42 is provided with a plurality of third through holes; the first through hole, the second through hole and the third through hole have different diameters.
The first sound absorbing layer 24, the second sound absorbing layer 32 and the third sound absorbing layer 42 have different respective open porosity. Through the above arrangement, the noise reduction device can effectively reduce noise of the noise source 7 having different frequencies.
Further, the bottom inner noise reduction cotton layer 211 and the bottom outer noise reduction cotton layer 221 are integrally formed to form a first noise reduction cotton layer 23; the bottom inner sound absorbing layer 212 and the bottom outer sound absorbing layer 222 are integrally formed to form the first sound absorbing layer 24; the first noise reduction assembly 2 further comprises a cover plate which is fixedly connected with the first sound absorption layer 24 and presses the first noise reduction cotton layer 23 on the first sound absorption layer 24.
In summary, the noise reduction apparatus provided in this embodiment can perform noise reduction processing on the noise source 7 for multiple times, and effectively reduce the noise generated by the noise source 7.
Example two
As shown in fig. 2 and 3, the present embodiment provides a rack air conditioner including a rack 6, a noise source 7, and a noise reduction device as in the first embodiment, the noise source 7 being mounted on a mounting plate 1; the noise reduction device is mounted in the frame 6. Mounting panel 1 and frame 6 fixed connection, first noise reduction assembly 2 and frame 6 fixed connection. Wherein, the noise source 7 of the present embodiment refers to a fan; the first embodiment describes a specific structure and technical effects of a noise reduction device, and the first embodiment refers to the noise reduction device and also has the technical effects.
Further, the frame 6 includes a top plate 61; the two ends of the top plate 61 are fixedly connected with the two bottom outside noise reduction plates 22 respectively. By using the top plate 61 as the top plate of the second noise radiation space, the whole size of the rack air conditioner is optimized while the noise reduction capability is ensured, and the structure is more compact.
In conclusion, the rack air conditioner provided by the embodiment can reduce noise of the fan for multiple times, and effectively reduces noise generated by the fan.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A noise reducing arrangement, comprising a mounting plate (1) and a first noise reducing assembly (2);
the first noise reduction assembly (2) comprises a bottom inner noise reduction plate (21) and two bottom outer noise reduction plates (22) which are respectively arranged at two ends of the bottom inner noise reduction plate (21); the bottom inner side noise reduction plate (21) and the mounting plate (1) are arranged at intervals, and a noise source mounting space is formed between the bottom inner side noise reduction plate and the mounting plate; two ends of the mounting plate (1) are respectively provided with a second noise reduction plate (3);
a second noise reduction plate (3) positioned at the same side of the noise source installation space and the bottom outside noise reduction plate (22) are arranged in an enclosing manner to form a first noise radiation space; wherein the second noise reduction plate (3) is inclined at a predetermined inclination angle toward a direction close to the noise source installation space;
and the bottom inner side noise reduction plate (21) and the two bottom outer side noise reduction plates (22) are arranged on one side far away from the noise source installation space in a surrounding manner to form a second noise radiation space.
2. The noise reduction device according to claim 1, characterized in that the mounting plate (1) comprises a first mounting plate (11) and two second mounting plates (12) fixedly arranged at both ends of the first mounting plate (11), respectively;
the bottom outer noise reduction plate (22) comprises a bottom outer noise reduction cotton layer (221) and a bottom outer sound absorption layer (222) which are sequentially arranged along the direction close to the second noise reduction plate (3);
the second noise reduction plate (3) comprises a second noise reduction cotton layer (31) and a second sound absorption layer (32); the second noise reduction cotton layer (31) and the second sound absorption layer (32) are sequentially stacked on the second mounting plate (12).
3. The noise reducer according to claim 2, further comprising a third noise reduction plate (4) disposed between the first mounting plate (11) and the bottom inner noise reduction plate (21);
the third noise reduction plate (4) comprises a third noise reduction cotton layer (41) and a third sound absorption layer (42) which are sequentially arranged along the direction close to the first mounting plate (11);
a supporting seat side plate (5) is arranged between the third sound absorption layer (42) and the first mounting plate (11), one end of the supporting seat side plate (5) is fixedly connected with the third sound absorption layer (42), and the other end of the supporting seat side plate is fixedly connected with the first mounting plate (11);
a third noise radiation space is formed between the bottom inner noise reduction plate (21) and the third noise reduction plate (4).
4. A noise reducing arrangement according to claim 3, characterised in that the bottom inner noise reducing plate (21) comprises a bottom inner noise reducing cotton layer (211) and a bottom inner sound absorbing layer (212) arranged in succession in the direction of approach to the mounting plate (1).
5. A noise reducing arrangement according to claim 3, characterized in that the third noise reducing plate (4) is provided with mounting holes for mounting noise sources (7).
6. The noise reducer according to claim 4, wherein the bottom inner noise reducing cotton layer (211) is integrally formed with the bottom outer noise reducing cotton layer (221) to form a first noise reducing cotton layer (23); the bottom inner sound absorbing layer (212) and the bottom outer sound absorbing layer (222) are integrally formed to form a first sound absorbing layer (24);
the sound absorption coefficients of the first noise reduction cotton layer (23), the second noise reduction cotton layer (31) and the third noise reduction cotton layer (41) are the same;
the first sound absorption layer (24), the second sound absorption layer (32) and the third sound absorption layer (42) are provided with a plurality of through holes with the same aperture, and the first sound absorption layer (24), the second sound absorption layer (32) and the third sound absorption layer (42) respectively correspond to the same aperture ratio.
7. The noise reducer according to claim 4, wherein the bottom inner noise reducing cotton layer (211) is integrally formed with the bottom outer noise reducing cotton layer (221) to form a first noise reducing cotton layer (23); the bottom inner sound absorbing layer (212) and the bottom outer sound absorbing layer (222) are integrally formed to form a first sound absorbing layer (24);
the sound absorption coefficients of the first noise reduction cotton layer (23), the second noise reduction cotton layer (31) and the third noise reduction cotton layer (41) are different;
the first sound absorption layer (24) is provided with a plurality of first through holes, the second sound absorption layer (32) is provided with a plurality of second through holes, and the third sound absorption layer (42) is provided with a plurality of third through holes; the first through hole, the second through hole and the third through hole have different diameters;
the first sound absorption layer (24), the second sound absorption layer (32) and the third sound absorption layer (42) respectively have different corresponding opening rates.
8. The noise reducer according to claim 4, wherein the bottom inner noise reducing cotton layer (211) is integrally formed with the bottom outer noise reducing cotton layer (221) to form a first noise reducing cotton layer (23); the bottom inner sound absorbing layer (212) and the bottom outer sound absorbing layer (222) are integrally formed to form a first sound absorbing layer (24); the first noise reduction assembly (2) further comprises a cover plate, the cover plate is fixedly connected with the first sound absorption layer (24), and the first noise reduction cotton layer (23) is pressed on the first sound absorption layer (24).
9. A rack air conditioner, characterized by comprising a rack (6), a noise source (7) and a noise reduction device according to claim 1, the noise source (7) being mounted on the mounting plate (1); the noise reduction device is arranged in the frame (6);
mounting panel (1) with frame (6) fixed connection, first fall make an uproar subassembly (2) with frame (6) fixed connection.
10. A rack air conditioner according to claim 9, characterized in that the rack (6) comprises a top plate (61); and two ends of the top plate (61) are respectively fixedly connected with the two bottom outer noise reduction plates (22).
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| CN202022945084.XU CN214620032U (en) | 2020-12-10 | 2020-12-10 | Noise reduction device and rack air conditioner |
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| CN202022945084.XU CN214620032U (en) | 2020-12-10 | 2020-12-10 | Noise reduction device and rack air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556158A (en) * | 2020-12-10 | 2021-03-26 | 广东海悟科技有限公司 | Noise reduction device and rack air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112556158A (en) * | 2020-12-10 | 2021-03-26 | 广东海悟科技有限公司 | Noise reduction device and rack air conditioner |
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