Noise suppression device of ventilation system

Abstract

The utility model discloses a ventilation system noise suppression device which comprises an air inlet section capable of reducing noise, a noise reduction section, a bending section and a connecting section, and a static pressure box capable of reducing noise is further arranged between the bending section and the connecting section. Impedance change can be caused by changing a sound propagation path by arranging the spiral noise reduction check ring, so that noise is reduced, vibration isolation damping pads can be used at the joint of an air duct and a building structure by arranging the first vibration isolation damping pad and the second vibration isolation damping pad, vibration propagating to the building structure through the bearing frame is reduced, and noise is reduced. The arranged first sound absorption layer and the second sound absorption layer have good sound absorption performance, the arranged resistive noise elimination layer has good sound absorption and heat insulation performance, the influence of fan vibration on an air duct system can be isolated by arranging the flexible connector, the noise level of a ventilation system can be monitored in real time by arranging the dust collection noise monitoring sensor, and the noise level of the ventilation system can be monitored in real time. Therefore, the practicability of the utility model is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation ducts, in particular to a noise suppression device for a ventilation system. Background Art

[0002] Ventilation is a building environmental control technology that uses ventilation, dilution, or exhaust to control the spread and harmful effects of air pollutants, ensuring the quality of both indoor and outdoor air. Fresh air from outside is used to replace indoor air polluted by living and daily life, maintaining a minimum standard of indoor air cleanliness. Ventilation ducts are essential components of this ventilation process.

[0003] As disclosed in the publication (announcement) number CN202254091 U, a ventilation duct is disclosed, comprising a tube body, a shutter, and a dust cover. The shutter is arranged in the middle of the tube body, the dust cover is arranged on the pipe opening at either end of the tube body, and the shutter is an aluminum alloy shutter.

[0004] Although the above technical solution solves the corresponding technical problem, it still has the following defects:

[0005] The ventilation duct noise reduction effect of the above technical solution is poor, and the noise is relatively high during the ventilation process, thereby affecting the comfort of use. Utility Model Content

[0006] The purpose of the present utility model is to provide a noise suppression device for a ventilation system. By arranging a spiral silencer ring, the impedance change can be caused by changing the sound propagation path, thereby reducing noise. By arranging a first vibration isolation damping pad and a second vibration isolation damping pad, a vibration isolation damping pad can be used at the connection between the air duct and the building structure to reduce the vibration from being transmitted to the building structure through the support frame. The first sound absorption layer and the second sound absorption layer are both made of glass wool. Since the fibers of the glass wool are slender and loose, there are many pores inside. These pores can effectively capture sound waves. When the sound waves enter the interior of the glass wool, they will be continuously reflected and refracted in the pores, thereby converting the sound energy into heat energy and being consumed, thereby having good sound absorption performance. The resistive sound absorption layer is made of rock wool. Since the fiber structure of rock wool can form a large number of tiny pores, energy loss will occur when the sound waves propagate in these pores, thereby having good sound absorption and heat insulation performance. By arranging a flexible joint, the influence of the fan vibration on the air duct system can be isolated. By arranging a dust collection noise monitoring sensor, the noise level of the ventilation system can be monitored in real time, thereby improving the practicality of the present utility model.

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:

[0008] A ventilation system noise suppression device, comprising:

[0009] An air inlet section, a silencer section, a bending section and a connecting section capable of reducing noise are provided, and a static pressure box capable of reducing noise is provided between the bending section and the connecting section.

[0010] The above-mentioned ventilation system noise suppression device, wherein a spiral silencer ring is provided on the inner wall of the air inlet section.

[0011] The above-mentioned ventilation system noise suppression device, wherein a first vibration isolation damping pad is provided at the inlet of the air inlet section.

[0012] The above-mentioned ventilation system noise suppression device, wherein a first sound absorbing layer is provided on the inner wall of the sound-absorbing section.

[0013] In the above-mentioned ventilation system noise suppression device, flexible joints are provided at adjacent connections of the air inlet section, the silencer section, the bending section, the static pressure box and the connecting section.

[0014] The above-mentioned ventilation system noise suppression device, wherein a resistive sound-absorbing layer is provided on the inner wall of the bending section.

[0015] The above-mentioned ventilation system noise suppression device, wherein a second sound absorbing layer is provided on the inner wall of the static pressure box.

[0016] In the above-mentioned ventilation system noise suppression device, a dust collection noise monitoring sensor is installed on the side of the inner wall of the connecting section.

[0017] The above-mentioned ventilation system noise suppression device, wherein a second vibration isolation and damping pad is provided at the outlet of the connecting section.

[0018] The above-mentioned ventilation system noise suppression device, wherein the silencer section is of conical design.

[0019] The utility model has at least the following beneficial effects:

[0020] The noise suppression device for a ventilation system provided by the present invention can reduce noise by causing impedance changes by arranging a spiral silencer ring, and can reduce noise by arranging a first vibration isolation damping pad and a second vibration isolation damping pad. Vibration isolation damping pads can be used at the connection between the air duct and the building structure to reduce vibration from being transmitted to the building structure through the support frame. The first sound absorption layer and the second sound absorption layer are both made of glass wool. Since the fibers of the glass wool are slender and loose, there are many pores inside. These pores can effectively capture sound waves. When the sound waves enter the interior of the glass wool, they will continuously reflect and refract in the pores, thereby converting the sound energy into heat energy and being consumed, thereby having good sound absorption performance. The resistive sound absorption layer is made of rock wool. Since the fiber structure of rock wool can form a large number of tiny pores, energy loss will occur when the sound waves propagate in these pores, so it has good sound absorption and heat insulation performance. By arranging a flexible joint, the influence of the fan vibration on the air duct system can be isolated. By arranging a dust collection noise monitoring sensor, the noise level of the ventilation system can be monitored in real time, thereby improving the practicality of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the noise suppression device for a ventilation system of the utility model;

[0023] Figure 2 This is a schematic cross-sectional view of the noise suppression device for a ventilation system according to the present invention;

[0024] Figure 3 This is a structural schematic diagram of the ventilation system noise suppression device of the utility model from another perspective.

[0025] Description of Figure Numbers:

[0026] 1. Air inlet section; 2. Silencer section; 3. Bending section; 4. Static pressure box; 5. Connecting section;

[0027] 101. Spiral silencer retaining ring; 102. First vibration isolation damping pad;

[0028] 201. First sound absorbing layer; 202. Flexible joint;

[0029] 301, resistive anechoic layer;

[0030] 401, second sound absorbing layer;

[0031] 501. Dust collection noise monitoring sensor; 502. Second vibration isolation damping pad. DETAILED DESCRIPTION

[0032] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0033] Please refer to Figures 1 to 3 As shown, a ventilation system noise suppression device provided in this embodiment includes: a noise-reducing air inlet section 1, a silencer section 2, a bending section 3 and a connecting section 5, and a noise-reducing static pressure box 4 is also provided between the bending section 3 and the connecting section 5.

[0034] Please refer to Figures 1 to 2 As shown, a spiral silencer ring 101 is provided on the inner wall of the air inlet section 1;

[0035] By adopting the above technical solution and providing the spiral silencer ring 101 , the impedance change can be caused by changing the sound propagation path, thereby reducing noise.

[0036] Please refer to Figures 1 to 2 As shown, the adjacent connections of the air inlet section 1, the muffler section 2, the bending section 3, the static pressure box 4 and the connecting section 5 are all provided with flexible joints 202;

[0037] By adopting the above technical solution and providing the flexible joint 202 , the influence of the fan vibration on the air duct system can be isolated.

[0038] Please refer to Figures 1 to 2 As shown, a resistive sound-absorbing layer 301 is provided on the inner wall of the bending section 3;

[0039] By adopting the above technical solution, the resistive sound-absorbing layer 301 is made of rock wool. Since the fiber structure of rock wool can form a large number of tiny pores, energy loss will occur when sound waves propagate in these pores, so it has good sound absorption and heat insulation properties.

[0040] Please refer to Figures 1 to 2 As shown, a second sound absorbing layer 401 is provided on the inner wall of the static pressure box 4, and a first sound absorbing layer 201 is provided on the inner wall of the muffler section 2;

[0041] By adopting the above technical solution, the first sound absorbing layer 201 and the second sound absorbing layer 401 are both made of glass wool. Since the fibers of the glass wool are slender and loose, and there are many pores inside, these pores can effectively capture sound waves. When the sound waves enter the interior of the glass wool, they will be continuously reflected and refracted in the pores, thereby converting the sound energy into heat energy and being consumed, thereby having good sound absorption performance.

[0042] Please refer to Figures 1 to 2 As shown, a dust collection noise monitoring sensor 501 is installed on the side of the inner wall of the connecting section 5;

[0043] By adopting the above technical solution and providing the dust collection noise monitoring sensor 501 , the noise level of the ventilation system can be monitored in real time, thereby improving the practicality of the present invention.

[0044] Please refer to Figures 1 to 2 As shown, a second vibration isolation and damping pad 502 is provided at the outlet of the connecting section 5, and a first vibration isolation and damping pad 102 is provided at the inlet of the air inlet section 1;

[0045] By adopting the above technical solution, by providing the first vibration isolation damping pad 102 and the second vibration isolation damping pad 502 , vibration isolation damping pads can be used at the connection between the air duct and the building structure to reduce vibration transmission to the building structure through the support frame.

[0046] Please refer to Figures 1 to 2 As shown, the muffler section 2 is of conical design;

[0047] By adopting the above technical solution, the conical-designed silencer section 2 can reduce the pressure of the airflow when it enters through the small end of the silencer section 2 and flows out through the large end, thereby achieving a good noise reduction effect.

[0048] The working principle of the present invention is as follows: by setting a spiral silencer retaining ring 101, the impedance change can be caused by changing the sound propagation path, thereby reducing noise; by setting a first vibration isolation damping pad 102 and a second vibration isolation damping pad 502, a vibration isolation damping pad can be used at the connection between the air duct and the building structure to reduce the vibration from being transmitted to the building structure through the support frame; the first sound absorbing layer 201 and the second sound absorbing layer 401 are both made of glass wool. Since the fiber of the glass wool is slender and loose, there are many pores inside. These pores can effectively capture sound waves. When the sound waves enter the interior of the glass wool, When sound waves pass through the air, they will be continuously reflected and refracted in the pores, thereby converting the sound energy into heat energy and being consumed, and thus having good sound absorption performance. The resistive sound-absorbing layer 301 is made of rock wool. Since the fiber structure of rock wool can form a large number of tiny pores, energy loss will occur when sound waves propagate in these pores. Therefore, it has good sound absorption and heat insulation performance. By setting the flexible joint 202, the influence of the fan vibration on the air duct system can be isolated. By setting the dust collection noise monitoring sensor 501, the noise level of the ventilation system can be monitored in real time, thereby improving the practicality of the present invention.

[0049] The working process of the ventilation system noise suppression device is as follows:

[0050] Noise reduction in air intake section:

[0051] The airflow first enters the air inlet section 1, and the built-in spiral silencer ring 101 causes impedance changes by changing the sound propagation path, effectively reducing the initial noise entering the system.

[0052] At the same time, the first vibration isolation and damping pad 102 provided at the inlet of the air inlet section reduces the direct transmission of the fan vibration to the air duct system.

[0053] Silence segment processing:

[0054] The airflow then enters the conical silencer section 2, whose conical structure causes the pressure of the airflow to gradually decrease as it passes through, further reducing noise.

[0055] The first sound absorbing layer 201 (made of glass wool) provided on the inner wall of the silencer section utilizes its porosity to effectively absorb and convert sound energy into heat energy, thereby further reducing noise.

[0056] Bending section and static pressure box:

[0057] When the airflow passes through the bending section 3, the resistive sound-absorbing layer 301 (made of rock wool) on the inner wall of the bending section consumes the sound wave energy again through its porous structure, thereby further reducing noise.

[0058] The air then enters the plenum 4, whose primary function is to balance the airflow pressure, reduce turbulence and eddies, thereby reducing noise and stabilizing the airflow. A second sound-absorbing layer 401 (also made of glass wool) is provided on the inner wall of the plenum to further enhance the sound absorption effect.

[0059] Connection segment and monitoring:

[0060] After the airflow flows out of the static pressure box, it passes through the connecting section 5. The dust collection noise monitoring sensor 501 installed on the side of the inner wall of the connecting section monitors the noise level of the ventilation system in real time to ensure stable operation of the system and facilitate maintenance.

[0061] The second vibration isolation and damping pad 502 provided at the outlet of the connecting section reduces the vibration transmitted to the building structure through the air duct, thereby ensuring a quiet environment inside the building.

[0062] Among them, the specific scheme of the static pressure box is as follows:

[0063] Key points of static pressure box design:

[0064] Size design: The size of the static pressure box needs to be reasonably designed according to the system air volume, wind speed and airflow distribution requirements to ensure that the airflow can be fully diffused and balanced in the static pressure box.

[0065] Internal structure: A guide plate or guide grille can be set inside the static pressure box to optimize the airflow direction, reduce eddy currents and turbulence, and improve the uniformity of airflow distribution.

[0066] Sound absorbing material: In addition to the second sound absorbing layer 401 on the inner wall, an appropriate amount of sound absorbing material (such as glass wool, mineral wool, etc.) can be filled into the static pressure box as needed to further enhance the sound absorption effect.

[0067] Sealing: The static pressure box must be well sealed to prevent air leakage, ensure that the airflow stays effectively in the static pressure box and achieve the expected noise reduction effect.

[0068] Inspection and maintenance: The design of the static pressure box should be easy to inspect and maintain, such as setting up inspection ports, removable sound-absorbing layers, etc., so that the sound-absorbing material can be replaced or cleaned when necessary.

[0069] In summary, this ventilation system noise suppression device effectively reduces the noise level of the ventilation system and improves the overall performance and comfort of the system through multi-level noise reduction measures and reasonable static pressure box design.

[0070] The above description shows and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the present invention as taught herein or through the techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A ventilation system noise suppression device, characterized in that: It comprises an air inlet section (1) capable of reducing noise, a muffler section (2), a bending section (3) and a connecting section (5), and a static pressure box (4) capable of reducing noise is further provided between the bending section (3) and the connecting section (5).

2. A ventilation system noise suppression device according to claim 1, characterized in that: A spiral silencer ring (101) is provided on the inner wall of the air inlet section (1).

3. A ventilation system noise suppression device according to claim 2, characterized in that: A first vibration isolation damping pad (102) is provided at the inlet of the air inlet section (1).

4. A ventilation system noise suppression device according to claim 3, characterized in that: A first sound absorbing layer (201) is provided on the inner wall of the sound absorbing section (2).

5. A ventilation system noise suppression device according to claim 4, characterized in that: Flexible joints (202) are provided at adjacent connections of the air inlet section (1), the silencer section (2), the bending section (3), the static pressure box (4), and the connecting section (5).

6. A ventilation system noise suppression device according to claim 5, characterized in that: A resistive sound-absorbing layer (301) is provided on the inner wall of the bending section (3).

7. A ventilation system noise suppression device according to claim 6, characterized in that: A second sound absorbing layer (401) is provided on the inner wall of the static pressure box (4).

8. The ventilation system noise suppression device according to claim 7, characterized in that: A dust collection noise monitoring sensor (501) is installed on the side of the inner wall of the connecting section (5).

9. The ventilation system noise suppression device according to claim 8, characterized in that: A second vibration isolation and damping pad (502) is provided at the outlet of the connecting section (5).

10. The ventilation system noise suppression device according to claim 9, characterized in that: The muffler section (2) is of conical design.

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