Silencing static pressure tank

Abstract

The utility model discloses a kind of muffling static pressure tank, comprising: cabinet, air inlet pipeline, air outlet pipeline, single-chip microcontroller, two cover plates, two filtering devices, two sound attenuation units, sound-absorbing material and four mounting brackets, the filtering device includes: flow guide plate, the sound attenuation unit includes: speaker, noise sensor one and noise sensor two, the flow guide plate is fixedly installed on the inner wall of one side of cabinet, the utility model aims at providing a kind of muffling static pressure tank, noise change can be monitored in real time, and the phase and amplitude of dynamic adjustment reverse sound wave, ensure that the effect of noise reduction is stable, for intermittent or burst noise (such as impact sound when equipment starts and stops), can be inhibited quickly and effectively, with original noise is superimposed and offset by microphone real-time acquisition noise signal, after being analyzed by single-chip microcontroller, generate reverse sound wave by speaker.This principle is remarkable to low-frequency noise effect, can fill the blind area of passive noise reduction, realize the advantage of full-band noise reduction.

Description

Technical Field

[0001] This utility model relates to the field of silencer technology, specifically to a silencer static pressure box. Background Technology

[0002] A silencer is a device that allows airflow to pass through but effectively blocks or attenuates the propagation of sound energy from the airflow. It is a type of resistive silencer that absorbs sound energy and reduces noise through sound-absorbing materials inside the chamber.

[0003] In existing technologies, silencing plenum chambers mainly rely on passive noise reduction principles to absorb or reflect sound waves. This design is effective for mid-to-high frequency noise, but its attenuation capability for low-frequency noise (such as the low-frequency humming sound generated by equipment such as fans and compressors) is weak. Passive noise reduction requires precise design of the silencing structure to target specific frequencies, but the design is complex and costly. Furthermore, passive noise reduction cannot be dynamically adjusted according to real-time noise changes. When the airflow velocity inside the silencing plenum chamber is too high, regenerated noise (such as turbulent noise) may be generated, which is difficult for passive noise reduction structures to effectively handle. Utility Model Content

[0004] The purpose of this invention is to provide a noise reduction static pressure box that can monitor noise changes in real time and dynamically adjust the phase and amplitude of the reverse sound wave to ensure stable noise reduction effect.

[0005] For intermittent or sudden noises (such as the impact sound during equipment start-up and shutdown), rapid and effective suppression can be achieved by using a microphone to collect noise signals in real time, analyzing them with a microcontroller, and then generating an inverse sound wave through a speaker to superimpose and cancel out the original noise. This principle is particularly effective for low-frequency noise, filling the blind spots of passive noise reduction and achieving the advantage of full-band noise reduction, thus solving the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a silencer plenum chamber, characterized in that it comprises: a chamber body, an air inlet duct, an air outlet duct, a microcontroller, two cover plates, two filter devices, two silencing units, sound-absorbing material, and four mounting brackets. The filter device comprises a baffle plate, and the silencing unit comprises a loudspeaker, a noise sensor one, and a noise sensor two. The baffle plate is fixedly installed on one inner wall of the chamber body, the loudspeaker is fixedly installed on one inner wall of the chamber body, the noise sensor one is fixedly installed on one outer wall of the baffle plate, and the noise sensor two is fixedly installed on one inner wall of the chamber body.

[0007] Furthermore, the filtration device also includes a square groove and an air filter element, wherein the square groove is disposed on the guide plate and the air filter element is slidably mounted on the square groove.

[0008] Furthermore, the air inlet duct is fixedly installed on one side of the outer wall of the housing.

[0009] Furthermore, the air outlet duct is fixedly installed on one side of the outer wall of the housing.

[0010] Furthermore, both of the cover plates are bolted to the top of the two guide plates.

[0011] Furthermore, the sound-absorbing material is fixedly installed on the inner wall of the enclosure.

[0012] Furthermore, all four mounting brackets are fixedly installed on the bottom outer wall of the housing.

[0013] In summary, due to the adoption of the above-mentioned technologies, the beneficial effects of this utility model are:

[0014] This invention, by incorporating a noise reduction unit, allows the microphone of a noise sensor to collect ambient noise signals in real time. The noise sensor converts the collected noise into an electrical signal, which is then sent to a microcontroller. The microcontroller analyzes the collected noise signal in real time and generates a reverse sound wave signal. The speaker introduces this reverse sound wave into the environment, where it superimposes and cancels out the original noise. The speaker features high precision and low distortion characteristics, preventing the introduction of new noise.

[0015] This invention incorporates a filtration device that slows down the airflow within a static pressure chamber, converting dynamic pressure into static pressure. As the airflow flows, it adsorbs impurities and moisture, preventing the sound-absorbing material from deteriorating in performance due to dust accumulation, moisture, or other reasons over time, thus reducing its noise reduction effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a noise-absorbing static pressure box according to the present invention;

[0017] Figure 2 This is a top sectional view of the silencing static pressure box of this utility model;

[0018] Figure 3 This is a side sectional view of the silencing static pressure box of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the guide plate of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the air filter element of this utility model.

[0021] In the diagram: 1. Housing; 2. Air inlet duct; 3. Air outlet duct; 4. Microcontroller; 5. Cover plate; 6. Filter device; 601. Guide plate; 602. Square channel; 603. Air filter element; 7. Silencing unit; 701. Speaker; 702. Noise sensor one; 703. Noise sensor two; 8. Sound-absorbing material; 9. Mounting bracket. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] This utility model provides, for example Figure 1-5 As shown, a silencing static pressure box is characterized by comprising: a box body 1, an air inlet duct 2, an air outlet duct 3, a microcontroller 4, two cover plates 5, two filter devices 6, two silencing units 7, sound-absorbing material 8, and four mounting brackets 9. The filter device 6 includes a baffle plate 601, and the silencing unit 7 includes a loudspeaker 701, a noise sensor 1 702, and a noise sensor 2 703. The baffle plate 601 is fixedly installed on one inner wall of the box body 1, the loudspeaker 701 is fixedly installed on one inner wall of the box body 1, the noise sensor 1 702 is fixedly installed on one outer wall of the baffle plate 601, and the noise sensor 2 703 is fixedly installed on one inner wall of the box body 1. The noise sensor 701 and noise sensor 702 are both CRY2120, which can convert the collected noise into an electrical signal and send it to the microcontroller 4, which is an STM32F103C8T6, to process and transmit the noise electrical signal. The speaker is a qlightecQWH35 to meet the output power requirements of the reverse sound wave.

[0024] Furthermore, the filtration device 6 also includes a square groove 602 and an air filter element 603. The square groove 602 is disposed on the guide plate 601, and the air filter element 603 is slidably mounted on the square groove 602. Guide rails are provided on both sides of the square groove 602, which play a guiding and supporting role during the installation and disassembly of the air filter element 603. The air filter element 603 is composed of a rigid support frame, filter paper and activated carbon. The air filter element 603 adsorbs impurities and moisture in the airflow through the filter paper and activated carbon.

[0025] In addition, the air inlet duct 2 is fixedly installed on one side of the outer wall of the housing 1.

[0026] In addition, the air outlet duct 3 is fixedly installed on one side of the outer wall of the housing 1.

[0027] In addition, both cover plates 5 are bolted to the top of the two guide plates 601. The top of the housing 1 has two through holes opposite to the top of the two guide plates 601, and the cover plates 5 are equipped with rubber rings to provide a seal after installation.

[0028] In addition, the sound-absorbing material 8 is fixedly installed on the inner wall of the box 1. The sound-absorbing material 8 is composed of centrifugal glass wool, rock wool and melamine foam.

[0029] In addition, all four mounting brackets 9 are fixedly installed on the bottom outer wall of the housing 1.

[0030] Working principle:

[0031] Step 1: The air exhausted by the air conditioner enters the interior of the cabinet 1 through the air intake duct 2. During the air flow, the sound-absorbing material 8 absorbs the noise carried by the air and generated by the air flow. At the same time, noise sensor 1 702 and noise sensor 2 703 capture the airflow noise in real time and convert it into an electrical signal, which is transmitted to the microcontroller 4. The microcontroller 4 analyzes the noise frequency and phase, generates an anti-phase sound wave signal, and transmits it to the speaker 701. The speaker 701 introduces the anti-phase sound wave into the environment. Since the anti-phase sound wave and the airflow noise are out of phase, the vibrations cancel each other out, which significantly reduces or even completely eliminates the noise carried by the airflow and generated, thus achieving the purpose of quiet operation.

[0032] Step Two: Simultaneously, during the airflow process, the air will come into contact with the guide plate 601 and the air filter 603. When the air comes into contact with the guide plate 601, the airflow velocity decreases, converting dynamic pressure into static pressure, allowing the airflow to travel further and the pressure to be more stable. When the air comes into contact with the air filter 603, the air filter 603 adsorbs impurities and moisture in the air, preventing impurities and moisture from contaminating the sound-absorbing material 8. Finally, the smooth airflow after sound absorption and filtration flows out from the air outlet duct 3. After long-term use, the air filter 603 can be directly removed by opening the cover plate 5 for replacement and cleaning.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A silencer static pressure chamber, characterized in that, include: The enclosure (1), air inlet duct (2), air outlet duct (3), microcontroller (4), two cover plates (5), two filter devices (6), two noise reduction units (7), sound-absorbing material (8), and four mounting brackets (9) are provided. The filter device (6) includes a baffle plate (601). The noise reduction unit (7) includes a loudspeaker (701), a noise sensor (702), and a noise sensor (703). The baffle plate (601) is fixedly installed on one inner wall of the enclosure (1). The loudspeaker (701) is fixedly installed on one inner wall of the enclosure (1). The noise sensor (702) is fixedly installed on one outer wall of the baffle plate (601). The noise sensor (703) is fixedly installed on one inner wall of the enclosure (1).

2. The silencer static pressure chamber according to claim 1, characterized in that: The filtration device (6) further includes a square groove (602) and an air filter element (603), wherein the square groove (602) is disposed on the guide plate (601) and the air filter element (603) is slidably mounted on the square groove (602).

3. The silencer static pressure chamber according to claim 1, characterized in that: The air inlet duct (2) is fixedly installed on one side of the outer wall of the housing (1).

4. The silencer static pressure chamber according to claim 1, characterized in that: The air outlet duct (3) is fixedly installed on one side of the outer wall of the box (1).

5. The silencer static pressure chamber according to claim 1, characterized in that: Both of the cover plates (5) are fixedly installed on top of the two guide plates (601) by bolts.

6. The silencer static pressure chamber according to claim 1, characterized in that: The sound-absorbing material (8) is fixedly installed on the inner wall of the box (1).

7. The silencer static pressure chamber according to claim 1, characterized in that: All four mounting brackets (9) are fixedly installed on the bottom outer wall of the housing (1).

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