CN111640413A

CN111640413A - Ventilation sound insulation device

Info

Publication number: CN111640413A
Application number: CN202010525040.3A
Authority: CN
Inventors: 康钟绪; 宋瑞祥; 刘强; 张慧娟
Original assignee: Beijing Municipal Institute of Labour Protection
Current assignee: Beijing Municipal Institute of Labour Protection
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-09-08

Abstract

The invention relates to the technical field of noise elimination, in particular to a ventilation and sound insulation device which comprises a shell and a noise elimination assembly, wherein a cavity is formed in the shell, the noise elimination assembly is arranged in the cavity, and a first through hole and a second through hole which are communicated with the cavity are respectively formed in two opposite sides of the shell. The silencing assembly is embedded in the cavity of the shell, and when airflow flows to the position near the shell, the airflow enters the cavity through the first through hole on one side of the shell and is discharged through the second through hole on the other side of the shell, so that the ventilation function is realized. When the sound wave is transmitted to the position near the shell, part of the sound wave is reflected by the shell, part of the sound wave enters the cavity through the first through hole, and after passing through the noise elimination assembly, the sound wave is transmitted outwards through the second through hole.

Description

Ventilation sound insulation device

Technical Field

The invention relates to the technical field of noise elimination, in particular to a ventilation and sound insulation device.

Background

With the development of industry, noise generated by the operation of various devices is gradually remarkable, and the noise has negative effects on the environment and workers in professions. The traditional closed noise reduction technology cannot meet the ventilation and heat dissipation requirements of a large amount of equipment, and only a ventilation and sound insulation system can be specially arranged, so that the complexity and cost of noise reduction measures are greatly improved. Along with the development of the noise reduction technology, the ventilation and sound insulation structure is applied, but the existing ventilation and sound insulation structure often adopts a complex structure, needs complex channel design, applies a micro-perforated structure and the like, and even adopts an active sound insulation technology, so that the cost is high, the implementation difficulty is high, and most of the ventilation and sound insulation structure mainly ensures high sound insulation capacity and wide sound insulation frequency band, and the ventilation efficiency is hardly improved. In fact, for a single device or a certain sound source, a sound insulation structure with high sound insulation capacity and wide sound insulation frequency band is not necessarily required, and in most cases, on the basis of meeting the ventilation requirement and enabling the device to normally operate, the sound insulation structure which is designed for the main frequency band of the noise of the device, has certain sound insulation capacity, is simple in structure and is low in cost is installed.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the ventilation and sound insulation device provided by the invention has the advantages that the structure which allows air flow to pass through and effectively reduces noise of a specific frequency band is formed by matching the shell and the noise elimination assembly, the structure is simple, the processing and the installation are easy, the cost is low, the practical range is wide, the technical problems that the traditional ventilation and sound insulation structure is too complex, the implementation difficulty is high, and the ventilation performance is poor are solved, the structure achieves good ventilation performance and sound insulation capacity aiming at the designed frequency band, and the ventilation performance is high, and the sound insulation frequency band can be designed in a targeted manner.

According to the ventilation and sound insulation device disclosed by the embodiment of the first aspect of the invention, the ventilation and sound insulation device comprises a shell and a sound attenuation component, wherein a cavity is formed in the shell, the sound attenuation component is arranged in the cavity, and a first through hole and a second through hole which are communicated with the cavity are respectively formed in two opposite sides of the shell.

According to one embodiment of the invention, the sound attenuation module comprises a partition structure for dividing the cavity into a plurality of sub-cavities, the partition structure being arranged parallel to the direction of flow of the gas flow inside the housing.

According to one embodiment of the invention, the diaphragm structure comprises a diaphragm and a longitudinal diaphragm, the diaphragm and the longitudinal diaphragm being arranged perpendicularly across each other.

According to one embodiment of the invention, the silencing assembly further comprises a pipe body, one end of the pipe body is communicated with the first through hole, the other end of the pipe body is communicated with the second through hole, and a third through hole is formed in the pipe wall of the pipe body.

According to an embodiment of the invention, one of said tubes is arranged in each of said sub-cavities.

According to one embodiment of the invention, the diameter of the third through hole is between 1mm and 4 mm.

According to one embodiment of the invention, the wall thickness of the tubular body is between 1mm and 5 mm.

According to an embodiment of the present invention, the housing includes a first panel and a second panel that are parallel and opposite to each other, the first panel and the second panel form the cavity therebetween, the first panel is provided with the first through hole, and the second panel is provided with the second through hole.

According to an embodiment of the present invention, an opening ratio of the first through hole on the first panel and an opening ratio of the second through hole on the second panel are both less than or equal to 30%.

According to one embodiment of the invention, the overall thickness of the housing is less than or equal to 160mm, and the thickness of the first panel and the second panel is less than or equal to 50 mm.

One or more technical solutions in the embodiments of the present invention at least have the following technical effects: according to the ventilation and sound insulation device provided by the embodiment of the invention, the silencing component is embedded in the cavity of the shell, and when airflow flows to the position near the shell, the airflow enters the cavity through the first through hole on one side of the shell and is discharged through the second through hole on the other side of the shell, so that the ventilation function is realized. When the sound wave is transmitted to the position near the shell, part of the sound wave is reflected by the shell, part of the sound wave enters the cavity through the first through hole, and after passing through the noise elimination assembly, the sound wave is transmitted outwards through the second through hole.

The ventilation and sound insulation device disclosed by the invention forms a structure which allows air flow to pass through and effectively reduces noise of a specific frequency band through the matching of the shell and the noise elimination assembly, has the advantages of simple structure, easiness in processing and installation, low cost and wide practical range, solves the technical problems of too complex traditional ventilation and sound insulation structure, great implementation difficulty and poor ventilation performance, realizes good ventilation performance and sound insulation capability aiming at a designed frequency band, and has the advantages of high ventilation performance and pertinence design of a sound insulation frequency band.

In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the present invention will be further described with reference to the accompanying drawings or will be understood by the practice of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 creative efforts.

FIG. 1 is a schematic structural view of a ventilation and sound insulation device provided with a partition plate according to an embodiment of the invention;

FIG. 2 is a schematic structural view of a ventilation and sound insulation device provided with a partition plate and a pipe body according to an embodiment of the invention;

FIG. 3 is a schematic cross-sectional structure view of an expansion sound-damping unit of the ventilation and sound-insulation device according to the embodiment of the invention;

FIG. 4 is a sound insulation performance curve of an expansion sound attenuation unit of the ventilation and sound insulation device according to the embodiment of the invention;

FIG. 5 is a schematic cross-sectional structure view of a resonance noise elimination unit of the ventilation and sound insulation device according to the embodiment of the invention;

fig. 6 is a sound insulation performance curve of a resonance sound attenuation unit of the ventilation and sound insulation device according to the embodiment of the invention.

Reference numerals:

1: a housing; 11: a sub-cavity; 12: a first through hole; 13: a second through hole; 14: a first panel; 15: a second panel;

2: a muffler assembly; 21: a separator structure; 22: a pipe body; 211: a diaphragm plate; 212: a longitudinal partition plate; 221: a third via.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "central", "longitudinal", "lateral", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

As shown in fig. 1 and 2, the ventilation and sound insulation device provided by the embodiment of the invention comprises a housing 1 and a sound attenuation assembly 2, wherein a cavity is formed in the housing 1, the sound attenuation assembly 2 is arranged in the cavity, and a first through hole 12 and a second through hole 13 which are communicated with the cavity are respectively formed in two opposite sides of the housing 1.

According to the ventilation and sound insulation device provided by the embodiment of the invention, the silencing component 2 is embedded in the cavity of the shell 1, and when airflow flows to the position near the shell 1, the airflow enters the cavity through the first through hole 12 on one side of the shell 1 and is discharged through the second through hole 13 on the other side of the shell 1, so that the ventilation function is realized. When the sound wave is transmitted to the vicinity of the shell 1, part of the sound wave is reflected by the shell 1, part of the sound wave enters the cavity through the first through hole 12, and after passing through the noise elimination assembly 2, the sound wave is transmitted outwards through the second through hole 13, and in the process, the sound wave sequentially passes through a plurality of structural changes of cross section sudden shrinkage and cross section sudden expansion to form complex impedance change, so that a good noise elimination effect is achieved in a specific frequency range.

The ventilation and sound insulation device disclosed by the invention forms a structure which allows airflow to pass through and effectively reduces noise of a specific frequency band through the matching of the shell 1 and the noise elimination component 2, is simple in structure, easy to process and install, low in cost and wide in practical range, solves the technical problems of too complex traditional ventilation and sound insulation structure, high implementation difficulty and poor ventilation performance, realizes good ventilation performance and sound insulation capability aiming at a designed frequency band, and has the advantages of high ventilation performance and pertinence design of a sound insulation frequency band.

In this embodiment, the first through holes 12 and the second through holes 13 are circular, the first through holes 12 and the second through holes 13 are uniformly distributed on the housing 1, the first through holes 12 and the second through holes 13 are arranged in a one-to-one correspondence manner, and the equivalent aperture is smaller than or equal to 30 mm. In other embodiments, the shapes of the first through hole 12 and the second through hole 13 may be other polygons or slits, and the first through hole 12 and the second through hole 13 are not correspondingly disposed.

As shown in fig. 3, according to one embodiment of the present invention, the muffler assembly 2 includes a partition structure 21 for partitioning the cavities to form a plurality of sub-cavities 11, the partition structure 21 being disposed parallel to the flow direction of the gas flow in the housing 1. In this embodiment, the partition plate structure 21 divides the internal cavity of the housing 1 into a plurality of sub-cavities 11, and the first through holes 12, the sub-cavities 11 and the second through holes 13 form an expansion sound attenuation unit. The air flow enters the sub-cavity 11 through the first through hole 12 and is discharged through the second through hole 13, so that the ventilation function is realized. The sound wave is partially reflected by the housing 1, partially enters the sub-cavity 11 through the first through hole 12, and is transmitted outwards through the second through hole 13 after the sound attenuation effect of the partition plate structure 21, and in the process, the sound wave sequentially passes through the structural changes of the cross section sudden shrinkage (the process that the sound wave enters the first through hole 12 from the surface of the housing 1), the first through hole 12, the cross section sudden expansion (the process that the sound wave enters the sub-cavity 11 from the first through hole 12), the sub-cavity 11, the cross section sudden shrinkage (the process that the sound wave enters the second through hole 13 from the sub-cavity 11), the second through hole 13 and the cross section sudden expansion (the process that the sound wave reaches the surface of the housing 1 from the second through hole 13), so that complex impedance changes are formed, and a good sound attenuation effect is achieved in a specific frequency. As shown in fig. 4, the embedded expansion type sound attenuation unit formed by the first through hole 12, the sub-cavity 11 and the second through hole 13 can achieve good sound insulation performance at medium and high frequencies.

In this embodiment, the first through hole 12 and the second through hole 13 are respectively disposed in the sub-cavity 11, and may be disposed at a central position of the sub-cavity 11 or a central position of the ion-biased cavity 11.

According to one embodiment of the present invention, the diaphragm structure 21 includes a diaphragm 211 and a longitudinal diaphragm 212, and the diaphragm 211 and the longitudinal diaphragm 212 are disposed to cross each other perpendicularly. In this embodiment, the horizontal partition 211 and the vertical partition 212 are vertically crossed to form a "#" shaped structure, thereby forming the square sub-cavity 11. In other embodiments, the partition structure 21 may alternatively be formed in other ways to enclose the polygonal sub-cavity 11.

As shown in fig. 2 and 5, according to an embodiment of the present invention, the muffler assembly 2 further includes a pipe 22, one end of the pipe 22 is communicated with the first through hole 12, the other end of the pipe 22 is communicated with the second through hole 13, and a third through hole 221 is formed on a pipe wall of the pipe 22. In this embodiment, the first through hole 12 is communicated with the second through hole 13 through the tube 22, at least one third through hole 221 is disposed on the tube 22 as a resonance hole, and the first through hole 12, the tube 22, the third through hole 221, the sub-cavity 11, and the second through hole 13 form a resonance sound attenuation unit. The air flow enters the tube body 22 through the first through hole 12 and is discharged through the second through hole 13, so that the ventilation function is realized. The sound wave is partially reflected by the shell 1, and partially enters the pipe body 22 through the first through hole 12, and after the sound attenuation effect of the resonance structure formed by the cooperation of the third through hole 221 and the sub-cavity 11, the sound wave enters the second through hole 13 through the pipe body 22 and is transmitted outwards, in the process, the sound wave sequentially passes through the structural changes of the cross section sudden shrinkage (the process that the sound wave enters the first through hole 12 from the surface of the shell 1), the first through hole 12, the pipe body 22, the third through hole 221, the sub-cavity 11, the pipe body 22, the second through hole 13 and the cross section sudden expansion (the process that the sound wave reaches the surface of the shell 1 from the second through hole 13), except the impedance change caused by the cross section change, the typical resonance sound attenuation structure formed by the third through hole 221 of the pipe body 22 and the sub-cavity 11 can greatly improve the sound attenuation capability of a low frequency band, so that. As shown in fig. 6, the first through hole 12, the third through hole 221, the sub-cavity 11, and the second through hole 13 form an embedded resonance type sound attenuation structure, which can achieve good middle and low frequency sound insulation performance.

In this embodiment, each tube 22 is provided with two third through holes 221, and the two third through holes 221 are arranged opposite to each other in the diameter direction of the tube 22. The diameter of the tube 22, the diameter of the first through hole 12 and the diameter of the second through hole 13 are consistent. In other embodiments, the number and the arrangement position of the third through holes 221 can be selected and set according to actual conditions, and when the positions of the first through hole 12 and the second through hole 13 do not correspond, the pipe body 22 is in an inclined state, which is beneficial to the noise elimination effect.

According to one embodiment of the present invention, one tube 22 is disposed in each sub-cavity 11. In this embodiment, only one pipe body 22 is arranged in each sub-cavity 11, and the pipe body 22 is located at the central position of the sub-cavity 11 corresponding to the first through hole 12 and the second through hole 13, so as to save the processing technology and the material to the maximum extent, and simplify the structure composition on the basis of ensuring the silencing effect. In other embodiments, a plurality of tubes 22 may be disposed in each sub-cavity 11, and the diameter of the tubes 22 and the number of the third through holes 221 may be changed for different numbers of tubes 22 to meet the requirement of noise elimination.

According to one embodiment of the present invention, the housing 1 includes a first panel 14 and a second panel 15 disposed in parallel and opposite to each other, a cavity is formed between the first panel 14 and the second panel 15, the first panel 14 is provided with a first through hole 12, and the second panel 15 is provided with a second through hole 13. In this embodiment, the housing 1 is plate-shaped, and is formed by combining the first panel 14 and the second panel 15, sound waves and air flow both flow from the outside of the first panel 14 to the outside of the second panel 15, and the muffler assembly 2 is located in a cavity between the first panel 14 and the second panel 15. In this embodiment, the first panel 14 is located above the second panel 15, the upper edge of the partition structure 21 is connected to the lower surface of the first panel 14, and the lower edge of the partition structure 21 is connected to the upper surface of the second panel 15.

According to an embodiment of the present invention, the opening ratio of the first through hole 12 on the first panel 14 and the opening ratio of the second through hole 13 on the second panel 15 are both less than or equal to 30%. The overall thickness of the housing 1 is less than or equal to 160mm, and the thicknesses of the first panel 14 and the second panel 15 are less than or equal to 50 mm. The diameter of the third through hole 221 is between 1mm and 4mm, and the wall thickness of the tube body 22 is between 1mm and 5 mm. The resistance loss coefficient, the silencing frequency band and the silencing amplitude of the air flow passing through the ventilation and sound insulation device can be determined by the parameter design of the structure. The thicknesses of the first panel 14 and the second panel 15, the apertures of the first through hole 12 and the second through hole 13, the size of the inner cavity of the shell 1, the pipe wall thickness of the pipe body 22 and the number and the apertures of the third through holes 221 of the structure are determined by design according to sound insulation and ventilation requirements, the requirements of noise elimination are adapted, and the best noise elimination effect is achieved.

When the material is used, all the structural materials are selected from opaque or transparent materials such as metal, plastic, wood and the like. The ventilation and sound insulation device can also be used for various sound barrier structures with ventilation requirements.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A ventilation sound-proof device is characterized in that: the silencer comprises a shell and a silencing assembly, wherein a cavity is formed in the shell, the silencing assembly is arranged in the cavity, and a first through hole and a second through hole which are communicated with the cavity are respectively formed in two opposite sides of the shell.

2. A ventilation and sound insulation device according to claim 1, characterized in that: the noise elimination assembly comprises a partition plate structure for dividing the cavity into a plurality of sub-cavities, and the partition plate structure is arranged in parallel to the air flow circulation direction in the shell.

3. A ventilation and sound insulation device according to claim 2, characterized in that: the partition structure comprises a transverse partition and a longitudinal partition, wherein the transverse partition and the longitudinal partition are perpendicular to each other and are arranged in a crossed mode.

4. A ventilation and sound insulation device according to claim 2, characterized in that: the silencing assembly further comprises a pipe body, one end of the pipe body is communicated with the first through hole, the other end of the pipe body is communicated with the second through hole, and a third through hole is formed in the pipe wall of the pipe body.

5. A ventilation and sound insulation device according to claim 4, characterized in that: each sub-cavity is internally provided with one pipe body.

6. A ventilation and sound insulation device according to claim 4, characterized in that: the diameter of the third through hole is 1 mm-4 mm.

7. A ventilation and sound insulation device according to claim 4, characterized in that: the wall thickness of the pipe body is between 1mm and 5 mm.

8. A ventilation and sound insulation device according to any one of claims 1 to 7, characterized in that: the shell comprises a first panel and a second panel which are parallel and opposite to each other, the cavity is formed between the first panel and the second panel, the first through hole is formed in the first panel, and the second through hole is formed in the second panel.

9. A ventilation and sound insulation device according to claim 8, wherein: the opening rate of the first through hole on the first panel and the opening rate of the second through hole on the second panel are both less than or equal to 30%.

10. A ventilation and sound insulation device according to claim 8, wherein: the whole thickness of the shell is less than or equal to 160mm, and the thicknesses of the first panel and the second panel are less than or equal to 50 mm.