CN219800472U - Noise reduction structure for exhaust direction of mute cover - Google Patents
Noise reduction structure for exhaust direction of mute cover Download PDFInfo
- Publication number
- CN219800472U CN219800472U CN202321200917.7U CN202321200917U CN219800472U CN 219800472 U CN219800472 U CN 219800472U CN 202321200917 U CN202321200917 U CN 202321200917U CN 219800472 U CN219800472 U CN 219800472U
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- exhaust
- fan
- plate
- cover
- sound
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- 238000009413 insulation Methods 0.000 claims abstract description 31
- 230000008030 elimination Effects 0.000 claims abstract description 11
- 238000003379 elimination reaction Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000011229 interlayer Substances 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005192 partition Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The utility model provides a noise reduction structure for a mute cover in exhaust direction, which comprises a fan carrying plate, a baffle plate and an exhaust sound insulation plate, wherein the exhaust sound insulation plate is relatively sealed with the fan carrying plate, and the baffle plate is clamped between the fan carrying plate and the exhaust sound insulation plate to form a noise elimination cavity and a buffer cavity; the fan carrying plate is closely connected with a fan sound-proof cover, and the overhanging end of the fan sound-proof cover stretches into the buffer cavity and is provided with a plurality of through holes; an exhaust sound-proof cover is closely connected to the exhaust sound-proof plate, and the overhanging end of the exhaust sound-proof cover stretches into the noise-eliminating cavity and is provided with a plurality of perforations; the baffle plate is provided with through holes for the fan sound-proof cover and the exhaust sound-proof cover to pass through in a sealing way, and a return hole for enabling the buffer cavity to be communicated with the noise elimination cavity is arranged between the two through holes. The utility model has the advantages of small occupied space and good noise reduction effect through the tortuous path.
Description
Technical Field
The utility model relates to a mute cover structure of a standard laboratory.
Background
At present, in laboratory analysis industry, for building a standard laboratory, a mute cover is required to effectively reduce instrument noise, the mute cover is required to have good noise reduction effect, and the working temperature in the mute cover is required to be ensured to be within an acceptable range of an instrument.
The main noise of the mute cover is derived from the air outlet end, and the air outlet is provided with the functions of exhausting and radiating, so that the mute cover cannot be completely sealed, and more noise is exhausted due to the exhaust holes. At present, a common structure is that a baffle plate is added on the exhaust side, and the baffle plate can block certain noise but can cause temperature rise, so that both noise reduction and temperature cannot be simultaneously achieved. If the customer needs more strict and efficient noise reduction effect, the existing structure cannot meet the requirement.
Disclosure of Invention
Based on the structure, the utility model provides a noise reducing structure for exhausting and reducing noise of the mute cover, which ensures the performance of the instrument and simultaneously further reduces noise.
The technical scheme adopted by the utility model is as follows:
the utility model provides a silence cover exhaust is to structure of making an uproar falls, its characterized in that includes fan carrying plate, barrier plate and exhaust acoustic celotex board, wherein:
the exhaust sound insulation plate is relatively sealed with the fan carrying plate, the interlayer plate is clamped between the fan carrying plate and the exhaust sound insulation plate, a noise elimination cavity is formed between the fan carrying plate and the interlayer plate, and a buffer cavity is formed between the exhaust sound insulation plate and the interlayer plate;
an air inlet is formed in the fan carrying plate and is used for installing a fan, a fan sound-proof cover is closely connected to the air inlet, one end of the fan sound-proof cover covers the fan, and the other end of the fan sound-proof cover extends into the buffer cavity and is provided with a plurality of through holes;
an exhaust sound insulation plate is provided with an exhaust outlet, an exhaust sound insulation cover is closely connected to the exhaust outlet, and one end of the exhaust sound insulation cover opposite to the exhaust outlet extends into the noise elimination cavity and is provided with a plurality of perforations;
the baffle plate is provided with through holes for the fan sound-proof cover and the exhaust sound-proof cover to pass through in a sealing way, and is also provided with a return hole for enabling the buffer cavity to be communicated with the noise elimination cavity.
And the noise reduction structure is characterized in that a sound insulation material is arranged on the fan carrying plate and/or the exhaust sound insulation plate and/or the inner wall of the fan sound insulation cover and/or the exhaust sound insulation cover.
The noise reduction structure is characterized in that the noise reduction cover exhausts air, wherein the sound insulation material is sound insulation cotton.
And the silencing cover exhausts air to the noise reduction structure, wherein an air grid is arranged on the return hole and/or the exhaust outlet.
The noise reduction structure is characterized in that the noise reduction structure is arranged in the exhaust direction of the noise reduction cover, and a plurality of through holes are formed in the side face of one end, extending into the buffer cavity, of the fan sound insulation cover.
The noise reduction structure is characterized in that the noise reduction structure is arranged in the exhaust direction of the mute cover, wherein a plurality of perforations are formed in the side face of one end, extending into the noise reduction cavity, of the exhaust sound-proof cover.
The noise reduction structure is characterized in that the noise reduction structure is arranged in the exhaust direction of the noise reduction cover, and the backflow hole is arranged between two through holes of the partition plate.
The utility model has the advantages that: the occupied space is small, and the noise reduction effect is strong.
Drawings
Fig. 1 is a schematic perspective exploded view of the present utility model.
FIG. 2 is a combined cross-sectional view of the present utility model showing the airflow and noise conduction paths.
Reference numerals illustrate: a fan mounting board 1; a separator plate 2; a through hole 21; return orifice 22; an exhaust soundproof plate 3; a fan 4; a fan sound insulation cover 5; an exhaust sound-proof cover 6; and a sound insulating material 7.
Detailed Description
As shown in fig. 1-2, the present utility model provides a noise reducing structure for exhaust of a noise reducing cover, comprising a fan carrying plate 1, a partition plate 2 and an exhaust sound insulation plate 3, wherein:
the exhaust sound insulation plate 3 is in relative close fit with the fan carrying plate 1, the interlayer plate 2 is clamped between the fan carrying plate 1 and the exhaust sound insulation plate 3, a noise elimination cavity is formed between the fan carrying plate 1 and the interlayer plate 2, and a buffer cavity is formed between the exhaust sound insulation plate 3 and the interlayer plate 2;
an air inlet is formed in the fan carrying board 1 for installing a fan 4, a fan sound insulation cover 5 is closely connected to the air inlet, one end of the fan sound insulation cover 5 covers the fan 4, and the other end extends into the buffer cavity and is densely provided with through holes on the side face;
an exhaust outlet is formed in the exhaust sound insulation plate 3, an exhaust sound insulation cover 6 is closely connected to the exhaust outlet, and one end, opposite to the exhaust outlet, of the exhaust sound insulation cover 6 extends into the noise elimination cavity and perforations are densely distributed on the side face;
the interlayer plate 2 is provided with through holes 21 for the fan sound-proof housing 5 and the exhaust sound-proof housing 6 to pass through in a sealing way, and a backflow hole 22 for enabling the buffer cavity to be communicated with the noise elimination cavity is arranged between the two through holes 21;
a sound insulating material 7 (for example, a soundproof cotton) is provided on the inner walls of the fan 4 mounting plate 1, the exhaust soundproof plate 3, the fan soundproof cover 5, and the exhaust soundproof cover 6;
air grids can be arranged on the backflow hole 22 and the air outlet for adjusting the air exhaust speed.
When the utility model is used, as shown in fig. 2, the fan 4 runs, generated hot air and noise enter the buffer cavity from the fan sound-proof housing 5, then enter the buffer cavity from the backflow hole 22 on the baffle plate 2, and then are discharged from the air outlet through the air exhaust sound-proof housing 6, and in the tortuous travel, the fan sound-proof housing 5, the air exhaust sound-proof housing 6, the noise-removing cavity and the sound-proof material 7 in the buffer cavity can be weakened through refraction to buffer the noise.
The noise reduction structure for the exhaust direction of the mute cover provided by the utility model has good noise reduction effect, and a DP25 pump is used as a noise source for carrying out a simulation experiment, and experimental data are as follows:
carrying an instrument: DP25 pump
Environmental noise: 36-38dB
Ambient temperature: 25 DEG C
Test distance: 1m
| Exhaust directional noise | |
| Bare metal noise | 59-60(dB) |
| Exhaust to noise of common structure | 56-57(dB) |
| Noise of exhaust to composite structure | 47-48(dB) |
Experiments prove that the utility model has good noise reduction effect and is suitable for occasions with larger space allowance and higher requirements on noise reduction effect.
Claims (7)
1. The utility model provides a silence cover exhaust is to structure of making an uproar falls, its characterized in that includes fan carrying plate, barrier plate and exhaust acoustic celotex board, wherein:
the exhaust sound insulation plate is relatively sealed with the fan carrying plate, the interlayer plate is clamped between the fan carrying plate and the exhaust sound insulation plate, a noise elimination cavity is formed between the fan carrying plate and the interlayer plate, and a buffer cavity is formed between the exhaust sound insulation plate and the interlayer plate;
an air inlet is formed in the fan carrying plate and is used for installing a fan, a fan sound-proof cover is closely connected to the air inlet, one end of the fan sound-proof cover covers the fan, and the other end of the fan sound-proof cover extends into the buffer cavity and is provided with a plurality of through holes;
an exhaust sound insulation plate is provided with an exhaust outlet, an exhaust sound insulation cover is closely connected to the exhaust outlet, and one end of the exhaust sound insulation cover opposite to the exhaust outlet extends into the noise elimination cavity and is provided with a plurality of perforations;
the baffle plate is provided with through holes for the fan sound-proof cover and the exhaust sound-proof cover to pass through in a sealing way, and is also provided with a return hole for enabling the buffer cavity to be communicated with the noise elimination cavity.
2. The structure for reducing noise of exhaust fan according to claim 1, wherein a sound insulating material is provided on the inner wall of the fan mounting plate and/or the exhaust sound insulating plate and/or the fan sound insulating cover and/or the exhaust sound insulating cover.
3. The silence cover exhaust to noise reduction structure of claim 2 wherein the sound insulation material is a sound insulation cotton.
4. The structure of claim 1, wherein an air grill is provided on the return hole and/or the exhaust port.
5. The structure of claim 1, wherein the plurality of through holes are provided on a side surface of one end of the fan sound-proof housing extending into the buffer chamber.
6. The structure for reducing noise from exhaust to exhaust of a mute cover according to claim 1, wherein a side surface of an end of the exhaust sound-proof cover extending into the noise-removing cavity is provided with the plurality of perforations.
7. The silence cover exhaust to noise reduction structure of claim 1 wherein the backflow hole is disposed between two through holes of the barrier plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321200917.7U CN219800472U (en) | 2023-05-17 | 2023-05-17 | Noise reduction structure for exhaust direction of mute cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321200917.7U CN219800472U (en) | 2023-05-17 | 2023-05-17 | Noise reduction structure for exhaust direction of mute cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219800472U true CN219800472U (en) | 2023-10-03 |
Family
ID=88180063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321200917.7U Active CN219800472U (en) | 2023-05-17 | 2023-05-17 | Noise reduction structure for exhaust direction of mute cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219800472U (en) |
-
2023
- 2023-05-17 CN CN202321200917.7U patent/CN219800472U/en active Active
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