CN217979236U - Air pipe exhaust silencer - Google Patents
Air pipe exhaust silencer Download PDFInfo
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- CN217979236U CN217979236U CN202123055229.XU CN202123055229U CN217979236U CN 217979236 U CN217979236 U CN 217979236U CN 202123055229 U CN202123055229 U CN 202123055229U CN 217979236 U CN217979236 U CN 217979236U
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- sound absorber
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- exhaust silencer
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Abstract
The utility model discloses a silencer is aired exhaust to tuber pipe installs on the tuber pipe of new trend system, and this silencer is aired exhaust to tuber pipe includes: the sound absorber is arranged in the shell, and the sectional area of the shell is larger than that of the air pipe. The utility model has the advantages of good noise elimination effect, simple structure, convenient installation and small occupied space.
Description
Technical Field
The utility model relates to a noise elimination equipment technical field, in particular to silencer is aired exhaust by tuber pipe.
Background
The traditional centralized air system sends the processed fresh air to each household through an air pipe by a large-air-volume air handling unit, and viruses burst, so that the virus cross infection defect of the traditional centralized air system is more obvious.
The air pipe silencer of the existing household air system is usually arranged on a main pipeline, and has a good effect on reducing noise radiation of equipment transmitted to the indoor through an air pipe, but the air system has regenerative noise caused by air flow besides the equipment noise, when the wind power of the air system is unbalanced, the air volume in the pipeline is larger than the designed air volume, the local air velocity of the pipeline is higher, and therefore the indoor sound quality can be influenced by the generated regenerative noise of the air flow with the higher wind speed.
Disclosure of Invention
An object of the utility model is to provide a noise and the unbalanced problem's of wind-force silencer is aired exhaust of tuber pipe that exists among the solution family formula wind system.
In order to achieve the above purpose, the utility model provides a technical scheme does:
the utility model provides a silencer is aired exhaust to tuber pipe, installs on the tuber pipe of new trend system, and this silencer is aired exhaust to tuber pipe includes: the sound absorber is arranged in the shell, and the sectional area of the shell is larger than that of the air pipe.
Furthermore, the sound absorber is of a mesh structure, a cavity is formed in the sound absorber, and porous sound absorbing materials are filled in the cavity.
Further, the sound absorber is coated with glass cloth outside or inside.
Furthermore, two ends of the sound absorber face the air inlet and the air outlet of the shell respectively.
Further, the sectional area of the end part of the sound absorber is smaller than that of the middle part of the sound absorber.
Further, the end of the sound absorber is in a wedge shape.
Furthermore, the sound absorber is a geometric body with two symmetrical ends, the sound absorber is abutted against the inner wall of the shell, and a gap is reserved between the sound absorber and the shell.
Further, the porous sound-absorbing material is: centrifuging glass wool or superfine glass fiber rock wool or kapron fiber; the sound absorber is made of one of a galvanized plate, an aluminum plate, a polyvinyl chloride material and stainless steel.
Furthermore, the size of the air inlet of the outer shell is consistent with that of the air pipe, the size of the air outlet of the outer shell is consistent with that of the air pipe, the sectional area of the sound absorber is larger than that of the air inlet of the outer shell, and the sectional area of the sound absorber is larger than that of the air outlet of the outer shell.
Furthermore, the air pipe air exhaust silencer is arranged on an air pipe in the middle or at the tail end of a pipeline of the fresh air system.
Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that: the utility model discloses a tuber pipe silencer of airing exhaust utilizes the resistance and the hindering nature noise elimination principle of shell and acoustic absorber, solves the noise and the unbalanced problem of wind-force that exist among the family formula wind system, guarantees that the inside each position amount of wind of pipeline is even, the wind speed is even, makes pipe-line system wind-force balanced to reduce the noise, the noise-abatement effect is good, does not change the original structure of new trend system pipeline and stringing mode, simple structure, simple to operate, occupation space are little.
Drawings
Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention.
Fig. 2 is a schematic front view of the wind pipe exhaust silencer of fig. 1.
Fig. 3 isbase:Sub>A schematic sectional view taken along the directionbase:Sub>A-base:Sub>A in fig. 2.
Wherein: 1. a shell, 11. An air inlet, 12. An air outlet, 2. A sound absorber 3, porous sound absorption material and 4, glass cloth.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1-3, the utility model discloses a silencer is aired exhaust to tuber pipe installs on the tuber pipe of new trend system, and this silencer is aired exhaust to tuber pipe includes: the sound absorber comprises a shell 1 and a sound absorber 2, wherein the shell 1 is provided with an air inlet 11 and an air outlet 12, the sound absorber 2 is installed in the shell 1, the sectional area of the shell 1 is larger than that of an air pipe, the size of the air inlet 11 of the shell 1 is consistent with that of the installed air pipe, the size of the air outlet 12 of the shell 1 is consistent with that of the installed air pipe, the air outlet can be circular, rectangular, oval and the like, and the length and the size of the shell 1 can be determined according to the noise reduction and the installation space.
The utility model discloses at first utilize the acoustic characteristic that the reactive muffler suddenly changed out to expand the chamber on the tuber pipe (install the shell 1 of tuber pipe exhaust muffler promptly), utilize the acoustic characteristic of tuber pipe and 1 sudden change departments of shell, reflect partial sound wave back to the sound source direction and realize the noise elimination purpose, then utilize hindering nature principle, settle sound absorber 2 in shell 1, utilize the impedance noise elimination principle to reach noise elimination, the balanced purpose of wind-force.
The utility model discloses a sound absorber 2 adopts mesh structure, and galvanized sheet, aluminum plate, PVC material or stainless steel etc. can be chooseed for use to the preparation material to reduce the acoustic wave transmissivity, thick and the perforation rate can be according to the acoustic characteristic adjustment of pipeline. A cavity is arranged in the sound absorber 2, a porous sound absorbing material 3 is filled in the cavity, and the porous sound absorbing material 3 can be centrifugal glass wool, superfine glass fiber rock wool, kapron fiber and the like. The sound absorber 2 is coated with a glass cloth 4 on the outside or inside to prevent the porous sound absorber 3 filled inside the sound absorber 2 from diffusing into the room along with the airflow of the wind pipe.
The two ends of the sound absorber 2 face the air inlet 11 and the air outlet 12 of the housing 1, the sound absorber 2 can be set to be a geometric body with two symmetrical ends according to the flow area, the flow rate and the like, the end of the sound absorber 2 is set to be wedge-shaped, or the sound absorber 2 is designed to be a geometric body with the cross section area of the end of the sound absorber 2 smaller than the cross section area of the middle of the sound absorber 2, and the two ends are both conical geometric bodies as shown in this embodiment, so that the acoustic impedance between air and sound absorbing materials is gradually transited, and good impedance matching and sound absorbing effects are obtained. The acoustic absorber 2 and 1 inner wall butt of shell to have the clearance between acoustic absorber 2 and the shell 1, the sectional area of acoustic absorber 2 is greater than the sectional area of the air intake 11 of shell 1, and the 2 sectional areas of acoustic absorber are greater than the sectional area of the air outlet 12 of shell 1, when realizing noise elimination and wind balance, guarantee the air output of new trend system.
In this embodiment, the housing is cylindrical, and the cross-sectional area of the air inlet of the housing is S1, S1= pi (a/2) 2 The cross-sectional area of the outer shell is S2, S2= pi (b/2) 2 The sectional area of the sound absorber is S3,S3=π(c/2) 2 the sectional area of the air outlet of the shell is S4, S4= pi (d/2) 2 S1, S2, S3 and S4 satisfy the relation: s2 > S3 > S1= S4.
The utility model discloses an air pipe exhaust silencer is installed on the middle part of the pipeline of new trend system or terminal tuber pipe, and it is lower to solve current terminal noise elimination technique noise elimination volume of pipeline, can not eliminate the problem of low frequency range noise. The utility model discloses make full use of the flow field characteristic in sound wave and the tuber pipe, it is uneven to solve new trend system wind-force, and the local air velocity of appearance is great and produce the problem of air current noise regeneration. The utility model discloses to the defect that family formula air system pipe diameter is little, installation space is not enough, at the arrangement mode that does not change current pipeline, through the tuber pipe silencer of airing exhaust that makes at pipeline middle part or terminal installation, reach and fall the purpose of making an uproar, ensure whole new trend system's wind-force balance simultaneously.
The utility model discloses utilize hindering nature and resistance noise elimination principle, utilize the sound wave to turn into the purpose that heat energy and distribute the realization noise elimination because of the friction when propagating in porousness sound absorbing material, simultaneously because the shape characteristic of acoustic absorber 2 promotes the local resistance coefficient under the prerequisite that does not influence the air supply volume, ensures that whole new trend system's wind-force is balanced, has the advantage that noise elimination effect is good, simple structure, installation are convenient.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a silencer of airing exhaust of tuber pipe, installs on the tuber pipe of new trend system, its characterized in that includes: the sound absorber comprises a shell and a sound absorber, wherein the shell is provided with an air inlet and an air outlet, the sound absorber is arranged in the shell, the sectional area of the shell is larger than that of the air pipe, the size of the air inlet of the shell is consistent with that of the air pipe, the size of the air outlet of the shell is consistent with that of the air pipe, two ends of the sound absorber respectively face the air inlet and the air outlet of the shell, the sectional area of the end part of the sound absorber is smaller than that of the middle part of the sound absorber or the end part of the sound absorber is in a wedge shape, the sectional area of the sound absorber is larger than that of the air inlet of the shell, and the sectional area of the sound absorber is larger than that of the air outlet of the shell.
2. The air pipe exhaust silencer according to claim 1, wherein the sound absorber is of a mesh structure, a cavity is formed in the sound absorber, and porous sound absorbing materials are filled in the cavity.
3. The ducted exhaust silencer according to claim 2, wherein said sound absorber is externally or internally coated with glass cloth.
4. The air duct exhaust silencer according to claim 3, wherein the end of the sound absorber is tapered.
5. The air pipe exhaust silencer according to claim 4, wherein the sound absorber is a geometric body with symmetrical ends, the sound absorber is abutted against the inner wall of the outer shell, and a gap is formed between the sound absorber and the outer shell.
6. The air duct exhaust silencer according to claim 5, wherein said porous sound absorbing material is: centrifuging glass wool or superfine glass fiber rock wool or kapron fiber; the sound absorber is made of one of galvanized sheet, aluminum sheet, polyvinyl chloride material and stainless steel.
7. The air duct exhaust silencer according to claim 1, wherein the air duct exhaust silencer is mounted on an air duct at the middle or end of a pipeline of a fresh air system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123055229.XU CN217979236U (en) | 2021-12-07 | 2021-12-07 | Air pipe exhaust silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123055229.XU CN217979236U (en) | 2021-12-07 | 2021-12-07 | Air pipe exhaust silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217979236U true CN217979236U (en) | 2022-12-06 |
Family
ID=84253338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123055229.XU Active CN217979236U (en) | 2021-12-07 | 2021-12-07 | Air pipe exhaust silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217979236U (en) |
-
2021
- 2021-12-07 CN CN202123055229.XU patent/CN217979236U/en active Active
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