CN108757583B - Noise reduction device and noise reduction fan cabin with same - Google Patents
Noise reduction device and noise reduction fan cabin with same Download PDFInfo
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- CN108757583B CN108757583B CN201810587421.7A CN201810587421A CN108757583B CN 108757583 B CN108757583 B CN 108757583B CN 201810587421 A CN201810587421 A CN 201810587421A CN 108757583 B CN108757583 B CN 108757583B
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- sound
- noise reduction
- sound insulation
- air inlet
- outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a noise reduction device and a noise reduction fan cabin with the same. The noise reduction device comprises a first sound insulation part and a second sound insulation part, wherein the first sound insulation part is connected with the second sound insulation part, the first sound insulation part is of a semi-surrounding structure, and the second sound insulation part seals one end of the first sound insulation part; the first opening is opposite to the first sound insulation part, and the second opening is opposite to the second sound insulation part. The noise reduction fan cabin comprises a cabin body, wherein the cabin body comprises an air inlet and an air outlet and a sound transmission part, a noise reduction device is arranged in the cabin body and is arranged at the air inlet and the air outlet and is positioned between the air inlet and the air outlet and the sound transmission part. The noise reduction device and the noise reduction fan cabin with the noise reduction device provided by the invention not only ensure ventilation, but also reduce noise of the fan cabin, and have the advantages of lower cost, simple assembly process and higher feasibility.
Description
Technical Field
The invention relates to the technical field of cabin noise reduction, in particular to a noise reduction device and a noise reduction fan cabin with the noise reduction device.
Background
With the increasing requirements of the industry on the limit value of the ship noise, the noise limit value of a ship part area is reduced by 5 db, which brings great challenges to the existing rough shipbuilding mode, and the exceeding of the ship noise directly faces the risks of fine, delay ship delivery, huge capital modification and even abandon ship.
In ships, the cabin fans are a major cause of noise. The reason why the cabin fan generates noise can be divided into two parts, namely mechanical noise and aerodynamic noise, the noise is transmitted to the cabin inside the ship and the open area on the ship through the ship body structure and air, and when the situation is serious, the daily work and rest of personnel on the ship can be influenced, so that the fan noise is very necessary to be controlled.
In the prior art, some fans are changed from the original open area arrangement mode to the internal arrangement mode of a chimney so as to reduce the noise influence of the fans, but the effect is limited. Some fans have a muffler installed at the air inlet and outlet thereof, but the installation of the muffler requires a sufficient installation space and is expensive. The fan cabin is provided with more than two silencing plates which are arranged in a grid shape in the air inlet window, so that partial noise reduction function can be achieved, but enough space is reserved for ensuring ventilation in order to ensure that the fan cabin reaches a certain ventilation quantity, and the sound insulation quantity is greatly reduced.
Disclosure of Invention
The invention aims to overcome the defect that a fan cabin cannot effectively reduce noise in the prior art, and provides a noise reduction device and a noise reduction fan cabin with the noise reduction device.
The invention solves the technical problems by the following technical scheme:
A noise reduction apparatus, comprising: the first sound insulation part is connected with the second sound insulation part, the first sound insulation part is of a semi-surrounding structure, and the second sound insulation part seals one end of the first sound insulation part; the first opening is opposite to the first sound insulation part, and the second opening is opposite to the second sound insulation part.
With the above structure, noise entering from the first opening and the second opening can be blocked by the first sound insulating part and the second sound insulating part, thereby reducing noise transmission.
Preferably, in the noise reduction device of the present invention, the first opening is connected to the second opening.
By adopting the arrangement, one end of the first sound insulation part has certain ductility under the condition of being connected with the second sound insulation part, and the structure and layout of different noise sources can be adapted.
In the noise reduction device of the present invention, preferably, a balance member is provided between the first opening and the second opening, and both ends of the balance member are connected to the first sound insulation portion.
With the above arrangement, the center of gravity of the noise reduction device is balanced by the balancing member.
Preferably, in the noise reduction device of the present invention, the first sound insulation part is provided with a sound absorption layer toward the inner side of the first opening.
With the above arrangement, noise can be absorbed to a certain extent, and reverberant sound due to reflection can be reduced.
In the noise reduction device of the present invention, preferably, a sound insulation layer is provided on an inner side of the second sound insulation portion facing the second opening.
With the above arrangement, the sound can be blocked from propagating to the outside of the second sound-insulating portion.
A noise reduction fan cabin comprising a cabin body comprising an air inlet and an air outlet and a sound transmission portion, wherein the noise reduction device as described above is arranged in the cabin body, and the noise reduction device is arranged between the air inlet and the air outlet and the sound transmission portion.
Through the structure, noise generated in the horizontal direction and the vertical direction from the air inlet and outlet can be blocked by the noise reduction device, so that the noise quantity of the sound transmission part transmitted to the outside of the noise reduction fan cabin is reduced, the ventilation quantity of the air inlet and outlet can be ensured not to be influenced by the noise reduction device, the ventilation can be performed by utilizing the first opening and the second opening, and the ventilation requirement of the fan cabin is fully met.
Preferably, in the noise reduction fan cabin of the present invention, the sound transmission part includes a first sound transmission part, the first sound transmission part is located at a side of the air inlet and outlet, and the first sound insulation part is disposed around the air inlet and outlet and between the air inlet and outlet and the first sound transmission part.
By adopting the arrangement, the semi-surrounding structure of the first sound insulation part is utilized to prevent noise generated from the air inlet and outlet from being transmitted to the first sound transmission part positioned at the side part of the air inlet and outlet, and form a sound shadow area between the first sound insulation part and the first sound transmission part, thereby preventing the side transmission of the noise and playing the role of noise reduction.
Preferably, in the noise reduction fan cabin of the present invention, the edge of the air inlet and the edge of the first sound transmission part are connected to form a three-dimensional space; the outline of the first sound insulation part at least covers the cross section outline formed by intersecting the space where the first sound insulation part is positioned and the three-dimensional space.
By adopting the arrangement, the first sound insulation part can cover the path that most of noise generated on the air inlet and outlet can be transmitted to the sound transmission part, so that the lateral transmission of the noise generated by the air inlet and outlet is further reduced.
Preferably, in the noise reduction fan cabin of the present invention, the sound transmission part includes a second sound transmission part, the second sound transmission part faces the air inlet and outlet, and the second sound insulation part is arranged opposite to the air inlet and outlet and is located between the air inlet and outlet and the second sound transmission part.
By adopting the arrangement, the second sound insulation part is utilized to seal one end of the semi-surrounding structure of the first sound insulation part, noise generated from the air inlet and outlet is prevented from being transmitted to the second sound transmission part opposite to the air inlet and outlet, an acoustic shadow area is formed between the second sound insulation part and the second sound transmission part, vertical transmission of the noise is prevented, and the noise reduction function is achieved.
Preferably, in the noise reduction fan cabin of the present invention, the edge of the air inlet and the edge of the second sound transmission part are connected to form a three-dimensional space; and the outline of the second sound insulation part at least covers the cross section outline formed by intersecting the space where the second sound insulation part is positioned and the three-dimensional space.
By adopting the arrangement, the second sound insulation part can cover the path of most of noise generated on the air inlet and outlet and possibly transmitted to the second sound transmission part, so that the vertical transmission of the noise generated by the air inlet and outlet is further reduced.
Preferably, in the noise reduction fan cabin of the present invention, a sound absorbing material is provided on an inner side surface of the cabin body.
By adopting the arrangement, the indoor noise level of the fan cabin can be reduced, the noise transmitted to the outside is reduced, and the noise reduction function is further realized.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
According to the noise reduction device and the noise reduction fan cabin with the noise reduction device, the first sound insulation part and the second sound insulation part of the noise reduction device are used for blocking lateral transmission and vertical transmission of noise generated by the air inlet and outlet, noise is prevented from being transmitted outwards through the first sound transmission part and the second sound transmission part, reverberant sound caused by reflection is reduced through the sound absorption layer, sound is prevented from being transmitted to the outside of the cabin through the sound insulation layer, and the purpose of effectively controlling the noise is achieved. Compared with the prior art, the method has the advantages of lower cost, simple assembly process and strong feasibility, and has obvious effect of solving the problem of excessive noise of the measuring point caused by the fan under the premise of ensuring that the ventilation requirement of the fan cabin is fully met.
Drawings
Fig. 1 is a schematic structural diagram of a noise reduction device according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a noise reduction device according to embodiment 2 of the present invention.
Fig. 3 is a perspective schematic view of a noise reduction fan cabin according to embodiment 3 of the present invention.
Fig. 4 is an internal front view of a noise reduction fan cabin according to embodiment 3 of the present invention.
Fig. 5 is an internal simplified side view of a noise reduction fan compartment of embodiment 3 of the present invention.
Fig. 6 is a simplified top view of the interior of a noise reduction blower compartment according to embodiment 3 of the present invention.
Fig. 7 is a graph showing sound pressure level values of an outdoor area outside a louver of a fan cabin in the prior art.
Fig. 8 is a sound pressure level value of an outdoor area of a noise reduction fan cabin louver according to embodiment 3 of the present invention.
Reference numerals illustrate:
Noise reduction device 1
First sound insulation part 11
Second sound insulation part 12
First opening 13
Second opening 14
Balance member 15
Noise reduction fan cabin 2
Cabin body 21
Air inlet and outlet 211
First sound transmission portion 212
Second sound transmission part 213
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, embodiment 1 of the present invention discloses a noise reduction device 1, which includes: a first sound insulation portion 11 and a second sound insulation portion 12.
Wherein, the first sound insulation part 11 is connected with the second sound insulation part 12, the first sound insulation part 11 is of a semi-surrounding structure, and the second sound insulation part 12 seals one end of the first sound insulation part 11; a first opening 13 and a second opening 14, the first opening 13 facing the first sound-insulating portion 11, and the second opening 14 facing the second sound-insulating portion 12.
Specifically, in the noise reduction device 1 disclosed in this embodiment, the semi-surrounding structure of the first sound-insulation portion 11 can form a semi-open cavity inside, while the second sound-insulation portion 12 is blocked at one end of the first sound-insulation portion 11, so that only two inlets and outlets, namely, the first opening 13 and the second opening 14, of the semi-open cavity are naturally blocked by the first sound-insulation portion 11 or the second sound-insulation portion 12 no matter whether the sound enters from the first opening 13 or the second opening 14, and a low-sound-level "sound-shadow zone" is formed after the first sound-insulation portion 11 or the second sound-insulation portion 12, that is, the sound wave propagates through the first sound-insulation portion 11 or the second sound-insulation portion 12 to block diffraction, so that the propagation distance of the sound source to the sound-collection point is increased, the propagation direction is also changed, so that the sound is attenuated, and the purpose of noise reduction is achieved.
In the noise reduction device 1 of the present embodiment, the first opening 13 is connected with the second opening 14. That is, when one end of the first sound-insulating portion 11 is connected to the second sound-insulating portion 12, the other end thereof has a certain ductility, and can be adapted to the structure and layout of different noise sources. For example, the width of the opening at the bottom of the first sound insulating part 11 may be smaller than the outer diameter of the sound source, so as to better block the propagation path of sound emitted from the sound source by pulling the two feet of the opening apart and clamping the outer circumference of the sound source.
In the noise reduction device 1 of the present embodiment, the first sound insulation portion 11 is provided with a sound absorption layer toward the inside of the first opening 13. The first sound insulating portion 11 blocks the sound wave and then reflects the sound wave, thereby forming reverberant sound. Therefore, by laying the sound absorbing layer inside the first sound insulating portion 11, noise can be absorbed to some extent, and reverberant sound due to reflection can be reduced. The sound absorption layer is composed of sound absorption materials, and the sound absorption materials are different according to different sound source spectrums, wherein the sound absorption materials can be porous materials such as mineral wool, glass wool, felt, wood wool sound absorption boards and the like, or film sound absorption materials such as plastic films, canvas and artificial leather and the like.
In the noise reduction device 1 of the present embodiment, the second sound insulation portion 12 is provided with a sound insulation layer toward the inside of the second opening 14. Sound waves mainly enter from the second opening 14, and the sound insulation layer is laid on the inner side of the second sound insulation portion 12, so that the sound can be prevented from being transmitted to the outside of the second sound insulation portion 12. The sound insulation layer is made of sound insulation materials, and the sound insulation materials can be solid plates, gypsum boards, iron plates, sound insulation felts, fiber plates and the like.
Example 2
As shown in fig. 2, embodiment 2 of the present invention discloses a noise reduction device 1. The noise reduction device 1 of the present embodiment is largely identical in structure to the noise reduction device 1 disclosed in embodiment 1.
The noise reduction device 1 of the present embodiment is different from embodiment 1 in that a balance member 15 is provided between the first opening 13 and the second opening 14, and both ends of the balance member 15 are connected to the first sound insulation portion 11.
In the practical use process, the sound propagation path between the sound source and the sound receiving point is determined according to the practical application, so that in some noise reduction devices 1, the height of the first sound insulation part 11 will be very high, and the center of gravity will be very high, and because the first sound insulation part 11 is a semi-surrounding structure, the center of gravity will be inevitably deviated from the center. Therefore, in order to secure the stability of the noise reduction device 1, a balancing member 15 is provided between the first opening 13 and the second opening 14, that is, where the bottom of the first sound insulation portion 11 is largest, and the center of gravity of the noise reduction device 1 is balanced by the balancing member 15.
Example 3
As shown in fig. 3 to 4, the present embodiment discloses a noise reduction fan chamber 2 including a chamber body 21, the chamber body 21 including an air inlet and outlet 211 and a sound transmission portion, the chamber body 21 having disposed therein a noise reduction device 1 as described in embodiments 1 and 2 herein, the noise reduction device 1 being mounted at the air inlet and outlet 211 and located between the air inlet and outlet 211 and the sound transmission portion.
Specifically, fan noise is one of the main noise sources on the ship, and the fan is arranged in a designated cabin and subjected to effective acoustic treatment, so that the radiation of the fan noise to the work and living areas on the ship can be reduced to a great extent. In the noise reduction fan housing 2 of the present embodiment, a noise reduction device 1 is installed at the air inlet 211 such that a barrier is provided between the air inlet 211 and the sound transmission portion. In the noise reduction fan cabin 2, the sound transmission part is mainly a top plate 213 of the cabin body 21 and a louver 212 for ventilation, and in the actual use process, the top plate 213 and the louver 212 easily transmit transmission sound outwards, so that noise at other positions on the ship exceeds standards. The louver 212 has the function of ventilation, so that the air inlet and outlet quantity of the cabin body 21 can be well ensured, but the sound insulation effect of the louver 212 is poor, and noise of the cabin body 21 is transmitted to other positions on a ship to a great extent through the louver 212, so that the phenomenon of exceeding noise is caused; the ceiling 213 of the cabin body 21 also transmits a large portion of noise to other spaces on the ship, which also causes noise overscaling. In this embodiment, the first sound insulation part 11 is installed near the air inlet and outlet 211 in the form of a sound insulation screen, the second sound insulation part 12 is installed opposite to the air inlet and outlet 211 in the form of a sound insulation plate, the first sound insulation part 11 and the second sound insulation part 12 are always blocked between the air inlet and outlet 211 and the sound transmission part, and meanwhile, the ventilation quantity is guaranteed and the noise is reduced by ensuring that the wind flowing from the air inlet and outlet 211 can pass through the first opening 13 and the second opening 14. For economy, steel plates may be used for the first sound insulating portion 11 and the second sound insulating portion 12.
The noise reduction fan cabin 2 of the embodiment enables noise generated in the horizontal direction and the vertical direction from the air inlet and outlet 211 to be blocked by the noise reduction device 1, so that the noise amount transmitted to the outside of the noise reduction fan cabin 2 by the sound transmission part is reduced, the ventilation amount of the air inlet and outlet 211 can be ensured not to be influenced by the noise reduction device 1, the ventilation can be performed by utilizing the first opening 13 and the second opening 14, and the ventilation requirement of the fan cabin is fully met. As shown in fig. 7 and 8, the noise reduction effect of the noise reduction fan cabin 2 of the present embodiment is remarkable and can be reduced by at least about 8dBA as compared with the fan cabin in the related art.
In the noise reduction fan cabin 2 of the present embodiment, the sound transmitting portion includes a first sound transmitting portion and a second sound transmitting portion, the first sound transmitting portion is located at a side portion of the air inlet/outlet 211, and the first sound insulating portion 11 is disposed around the air inlet/outlet 211 and between the air inlet/outlet 211 and the first sound transmitting portion. By the semi-surrounding structure of the first sound insulation part 11, noise generated from the air inlet and outlet 211 is prevented from being transmitted to the sound insulation part positioned at the lateral direction of the air inlet and outlet 211, a sound shadow area is formed between the first sound insulation part 11 and the first sound transmission part, lateral transmission of the noise is prevented, and the function of noise reduction is achieved.
As shown in fig. 3 to 6, in the noise reduction fan chamber 2 of the present embodiment, the edge of the air inlet 211 is connected to the edge of the first sound transmission portion to form a three-dimensional space; the contour of the first sound insulation part 11 at least covers the cross-section contour formed by intersecting the space where the first sound insulation part 11 is located and the three-dimensional space, so that the first sound insulation part 11 can cover the path that most of the noise generated on the air inlet and outlet 211 may be transmitted to the first sound transmission part, and further reduce the lateral transmission of the noise generated by the air inlet and outlet 211. In fig. 5 and 6, assuming that the air inlet and outlet 211 is a point sound source, the height and width of the first sound insulation part 11 should ensure that the direct sound from the air inlet and outlet 211 to the first sound transmission part is blocked as much as possible, that is, the height of the first sound insulation part 11 should be greater than the height H of the first sound insulation part 11 in fig. 5, and the width of the first sound insulation part 11 should be greater than the width B of the first sound insulation part 11 in fig. 6, so that the sound range difference between the sound source and the sound receiving point is increased as much as possible.
In the noise reduction fan chamber 2 of the present embodiment, the sound transmitting portion includes a second sound transmitting portion, the second sound transmitting portion faces the air inlet/outlet 211, and the second sound insulating portion 12 is disposed opposite the air inlet/outlet 211 and between the air inlet/outlet 211 and the second sound transmitting portion. The second sound insulation part 12 is used for sealing one end of the semi-surrounding structure of the first sound insulation part 11, so that noise generated from the air inlet and outlet 211 is prevented from being transmitted to the second sound transmission part positioned opposite to the air inlet and outlet 211, a sound shadow area is formed between the second sound insulation part 12 and the second sound transmission part, vertical transmission of the noise is prevented, and the function of noise reduction is achieved.
In the noise reduction fan cabin 2 of the present embodiment, the edge of the air inlet 211 is connected with the edge of the second sound transmission part to form a three-dimensional space; the outline of the second sound insulation part 12 at least covers the cross-section outline formed by intersecting the space where the second sound insulation part 12 is located and the three-dimensional space, so that the second sound insulation part 12 can cover the path that most of noise on the air inlet and outlet 211 may be transmitted to the second sound transmission part, and further reduce the vertical transmission of noise generated by the air inlet and outlet 211.
In the noise reduction fan cabin 2 of the present embodiment, a sound absorbing material is provided on the inner side surface of the cabin body 21. Although the noise reduction device 1 has absorbed and reduced a part of noise, in order to be able to further reduce the noise level in the room of the fan cabin, further function of noise reduction, a sound absorbing material may be provided on the inner side surface of the cabin body 21, so that the noise reduction effect of the cabin body 21 is better.
Taking a ship fan cabin as an example, the cabin body 21 is 3.6m long, 3.3m wide and 2.8m high, and the fan noise is shown in the following table.
| Octave frequency/Hz | 63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 |
| Sound power level/dB (A) | 73.2 | 80.3 | 95.8 | 96.2 | 97.4 | 95.6 | 93.4 | 81.3 |
The application software performs acoustic analysis on the fan cabin and establishes a statistical energy model of the cabin body 21. The open air area outside the fan cabin, outside the louvers 212, before unmodified fan cabin layout, was calculated to have a noise level of 90dB (a) here, with sound pressure level values as shown in fig. 7. Around the air inlet 211 of the fan cabin, a circle of vertical sound insulation steel plate with the thickness of 10mm and a top sound insulation steel plate are added to serve as a first sound insulation part 11 and a second sound insulation part 12, wherein the height and the width of the first sound insulation part 11 are larger than those of H, B, 50mm thick rock wool is laid in the first sound insulation part 11, 50mm thick rock wool is laid on the inner side surface of the cabin body 21 and the inner side of a top plate 213 of the cabin body 21, the noise value of an open area outside the louver 212 is calculated to be 74dB (A), 16dB (A) is reduced, and the sound pressure level value is shown in fig. 8. It follows that the noise reduction effect of this fan cabin arrangement is significant.
According to the noise reduction device and the noise reduction fan cabin with the noise reduction device, the first and second sound insulation parts of the noise reduction device are used for blocking lateral and vertical transmission of noise generated by the air inlet and outlet, transmission sound is transmitted outwards through the first and second sound transmission parts, reverberant sound caused by reflection is reduced through the sound absorption layer, and the sound is blocked from being transmitted to the outside of the cabin through the sound insulation layer, so that the purpose of effectively controlling the noise is achieved. Compared with the prior art, the method has the advantages of lower cost, simple assembly process and strong feasibility, and has obvious effect of solving the problem of excessive noise of the measuring point caused by the fan under the premise of ensuring that the ventilation requirement of the fan cabin is fully met.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (7)
1. The utility model provides a noise reduction fan cabin, includes the cabin body, the cabin body includes air inlet and outlet and sound transmission portion, its characterized in that:
the cabin body is internally provided with a noise reduction device which is arranged at the air inlet and outlet and is positioned between the air inlet and outlet and the sound transmission part;
The noise reduction device comprises:
The first sound insulation part is connected with the second sound insulation part, the first sound insulation part is of a semi-surrounding structure, and the second sound insulation part seals one end of the first sound insulation part;
a first opening and a second opening, the first opening facing the first sound-insulating portion, the second opening facing the second sound-insulating portion;
The sound transmission part comprises a first sound transmission part, the first sound transmission part is positioned at the side part of the air inlet and outlet, and the first sound insulation part is arranged around the air inlet and outlet and positioned between the air inlet and outlet and the first sound transmission part;
The edge of the air inlet and the air outlet is connected with the edge of the first sound transmission part to form a three-dimensional space;
the outline of the first sound insulation part at least covers the cross section outline formed by intersecting the space where the first sound insulation part is positioned and the three-dimensional space;
the sound transmission part comprises a second sound transmission part, the second sound transmission part faces the air inlet and outlet, and the second sound insulation part faces the air inlet and outlet and is positioned between the air inlet and outlet and the second sound transmission part.
2. The noise-reducing fan compartment of claim 1, wherein the first opening is connected to the second opening.
3. The noise reduction fan compartment of claim 1, wherein a balance member is disposed between the first opening and the second opening, and both ends of the balance member are connected to the first sound insulation portion.
4. The noise reduction fan compartment of claim 1, wherein the first sound insulator is provided with a sound absorbing layer towards the inside of the first opening.
5. The noise-reducing fan compartment of claim 1, wherein the second sound-insulating portion is provided with a sound-insulating layer toward an inner side of the second opening.
6. The noise reduction fan compartment of claim 1, wherein:
The edge of the air inlet and outlet is connected with the edge of the second sound transmission part to form a three-dimensional space;
and the outline of the second sound insulation part at least covers the cross section outline formed by intersecting the space where the second sound insulation part is positioned and the three-dimensional space.
7. The noise-reducing fan compartment of claim 1, wherein the interior side of the compartment body is provided with sound absorbing material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810587421.7A CN108757583B (en) | 2018-06-06 | 2018-06-06 | Noise reduction device and noise reduction fan cabin with same |
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| CN201810587421.7A CN108757583B (en) | 2018-06-06 | 2018-06-06 | Noise reduction device and noise reduction fan cabin with same |
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| CN108757583B true CN108757583B (en) | 2024-07-30 |
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| CN111332413A (en) * | 2020-03-31 | 2020-06-26 | 华南建材(深圳)有限公司 | Fireproof return air silencer for ship cabin |
| CN114526267B (en) * | 2020-11-23 | 2024-01-30 | 广东美的白色家电技术创新中心有限公司 | Fan and range hood |
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| CN107399419A (en) * | 2016-05-19 | 2017-11-28 | 中集海洋工程研究院有限公司 | Ocean engineering accommodation and its noise elimination ventilation unit |
| CN208935030U (en) * | 2018-06-06 | 2019-06-04 | 上海外高桥造船有限公司 | Noise-decreasing device and noise abatement blower cabin with the noise-decreasing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT337409B (en) * | 1973-07-19 | 1977-06-27 | Fischbach Kg Blech Metall R | ROOF VENT |
| CN101660353B (en) * | 2009-09-02 | 2011-04-13 | 三一重工股份有限公司 | Noise reduction chamber |
| CN204590290U (en) * | 2015-03-25 | 2015-08-26 | 周辉 | A kind of roots blower machine room noise reduction compages |
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- 2018-06-06 CN CN201810587421.7A patent/CN108757583B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107399419A (en) * | 2016-05-19 | 2017-11-28 | 中集海洋工程研究院有限公司 | Ocean engineering accommodation and its noise elimination ventilation unit |
| CN208935030U (en) * | 2018-06-06 | 2019-06-04 | 上海外高桥造船有限公司 | Noise-decreasing device and noise abatement blower cabin with the noise-decreasing device |
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