A filtering and silencing system for the inlet of a fan

Abstract

The utility model discloses a kind of filtering silencing systems for fan inlet, including main part, sound absorption subassembly and filter component, the main part has the first end of detachably connecting fan air inlet, and the second end for air inlet, operating channel is equipped between the first end with the second end, sound absorption subassembly is annularly arranged on the inner wall of the operating channel, filter component is arranged in the operating channel, the filter component is between the sound absorption subassembly with the second end, filter component effectively intercepts dust, so that equipment, pipeline in production system no longer because of dust accumulation produces blockage, completely avoid the system shutdown caused by blockage, guarantee enterprise product yield stability, reduce economic benefit loss, sound absorption subassembly and dust interception belt the stable operation of fan brought by combination, make overall noise level drop to within industrial place noise emission standard, realize production system stable, low-noise, efficient operation.

Description

Technical Field

[0001] This application relates to the field of industrial fan technology, and in particular to a filtration and noise reduction system for a fan inlet. Background Technology

[0002] In the industrial production sector, various types of fan equipment, such as axial flow fans, air compressors, and induced draft fans, play a crucial role and are indispensable core equipment for many industrial production enterprises to maintain the normal operation of their systems. The main function of these fans is to establish the required negative or positive pressure environment for the industrial production system through specific working principles, thereby ensuring that the entire production process proceeds in an orderly manner according to the preset process requirements.

[0003] Specifically, some fans, during operation, first draw in air from the external environment, then pressurize the air before delivering it to the industrial production system. This pressurized air participates in various processes within the production enterprise. For example, in some chemical reaction processes, material drying processes, and smelting processes, pressurized air plays a crucial role in providing the necessary conditions for the production process and ensuring the smooth operation of production activities.

[0004] However, the process of the aforementioned fan drawing in air and delivering it to the system not only presents the problem of dust introduction but also significant noise pollution. On one hand, the fan itself, operating at high speed, generates basic noise due to the intense friction between the impeller and the air, the motor's operation, and the turbulence of the airflow within the duct, initially impacting the surrounding working environment. On the other hand, dust particles in the air are carried into the industrial production system. During the system's long-term continuous operation, this introduced dust accumulates within the system, causing not only dust accumulation and blockages but also further exacerbating noise pollution.

[0005] When industrial production systems, related equipment, or connecting pipes become clogged due to dust accumulation, the commonly used solutions in the industry have significant limitations. For some clogged systems related to the furnace body, the only current solution is to shut down the furnace and lower the temperature. Once the furnace temperature has dropped to a suitable operating range, the existing masonry structure inside the furnace is completely dismantled and then rebuilt to clear the blockage and restore the furnace's normal function. However, for other general system, equipment, or pipe blockages, the entire industrial production system must be shut down. Significant time and effort must be invested in locating the specific blockage. After locating the blockage, the corresponding system components, pipes, or equipment must be disassembled before cleaning operations can begin.

[0006] This traditional cleaning method is not only extremely cumbersome to operate, consuming a lot of manpower and time, and has low cleaning efficiency, but also directly leads to a significant reduction in the output of enterprise products because the system needs to be shut down for a long time. Utility Model Content

[0007] In view of the deficiencies in the prior art, this application provides a filtration and silencing system for the inlet of a fan to solve the problem of difficult noise and dust pollution from fans in the prior art.

[0008] The above-mentioned objectives of this application are mainly achieved through the following technical solutions: A filtration and noise reduction system for a fan inlet, the filtration and noise reduction system comprising: The main body has a first end that is detachably connected to the air inlet of the fan, and a second end for air intake, with a working channel provided between the first end and the second end; The sound-absorbing components are arranged in a ring on the inner wall of the working channel; A filter assembly is arranged within the working channel, and the filter assembly is located between the sound-absorbing assembly and the second end.

[0009] In an optional embodiment, the sound-absorbing component is covered with a fixing mesh, which is fixedly connected within the working channel.

[0010] In an optional embodiment, the sound-absorbing component is configured as sound-absorbing cotton and is cylindrical in shape.

[0011] In an optional embodiment, the fixing mesh has uniformly distributed mesh holes, and the thickness of the sound-absorbing cotton is not less than the wall thickness of the main body.

[0012] In an optional embodiment, a baffle is provided between the sound-absorbing component and the filter component.

[0013] In an optional embodiment, the filter assembly includes a positioning ring fixed within the working channel, the positioning ring having a through hole at its center.

[0014] In an optional embodiment, the filtration assembly includes a plurality of filter bags, and the openings of the filter bags are arranged facing the second end.

[0015] In an optional embodiment, the filter bag is detachably secured to the positioning ring by bolts.

[0016] In an optional embodiment, the filtering assembly further includes a filter screen fixedly disposed on the positioning ring.

[0017] In an optional embodiment, the filtration and noise reduction system further includes an inlet section fixedly connected to the first end, the other end of which is used to connect to the air inlet of the fan.

[0018] Compared with the prior art, the advantages of this application are: The filtration and noise reduction system of this application is used for filtration and noise reduction operations at the inlet of a fan. The filtration and noise reduction system includes a main body, a sound-absorbing component, and a filter component. The main body has a first end that is detachably connected to the air inlet of the fan, and a second end for air intake. A working channel is provided between the first end and the second end. The sound-absorbing component is arranged in a ring on the inner wall of the working channel, and the filter component is arranged in the working channel. The filter component is located between the sound-absorbing component and the second end.

[0019] This filtration and noise reduction system achieves integrated dust interception and noise control through the coordinated operation of the main body, sound-absorbing components, and filter components. The first end of the main body is detachably connected to the fan inlet, and the second end is used for air intake. The working channel between the two ends provides space for air circulation and operation. The sound-absorbing components are arranged in a ring on the inner wall of the working channel, and the filter components are located in the working channel between the sound-absorbing components and the second end, forming an air handling path of "filtration first, then noise reduction".

[0020] When the fan starts running, outside air is naturally drawn into the working channel from the second end of the main body. It first comes into contact with the filter component located at the front end of the channel. As the air passes through the filter component, the dust particles it contains are effectively intercepted. Only clean air can continue to flow along the working channel to the first end, preventing dust from entering the fan and subsequent production system with the air. This cuts off the problem of dust accumulation and blockage of the system, equipment and pipes at the source. At the same time, when the air flows in the working channel, it will generate flow noise due to airflow turbulence and friction with the channel wall. The basic noise generated by the high-speed operation of the fan itself will also be transmitted into the channel through the air inlet. The sound-absorbing component can stably contact these noises. Through the absorption, reflection and dissipation of sound waves by the sound-absorbing material, the noise energy is greatly reduced. Moreover, since the filter component has intercepted dust, the clean air will not cause dust to accumulate inside the fan after entering the fan. This avoids the additional noise caused by abnormal increase in fan load and aggravated impeller vibration due to dust accumulation. It effectively avoids the vicious cycle of "blockage, shutdown for cleaning, and noise accumulation".

[0021] Compared to the cumbersome process of shutting down furnaces, dismantling and rebuilding existing systems, and requiring complete shutdown for cleaning, this filtration and silencing system allows for convenient replacement or cleaning of filter components via detachable main parts without system shutdown. This significantly reduces maintenance and time costs. Furthermore, it eliminates the need for additional independent filtration and silencing equipment, simplifying the system structure and reducing space requirements. On one hand, the filter components effectively intercept dust, preventing blockages in equipment and pipelines within the production system, thus completely avoiding system shutdowns caused by blockages, ensuring stable product output, and minimizing economic losses. On the other hand, the combination of sound-absorbing components and the stable operation of the fan due to dust interception reduces the overall noise level to within industrial noise emission standards, protecting the hearing health of on-site operators, reducing the risk of noise-related safety accidents, and achieving stable, low-noise, and efficient operation of the production system. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of the filtration and noise reduction system is provided for the embodiments of this application; In the diagram: 100, main body; 101, first end; 102, second end; 103, working channel; 200, sound absorption component; 201, fixing mesh; 301, positioning ring; 302, filter bag; 303, filter screen; 304, guide plate; 305, inlet section. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the present invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0025] During the process of a fan drawing in air and delivering it to the system, the gradual increase in dust accumulation will first cause various adverse effects on the entire industrial production system. Specifically, this manifests as a continuous increase in dust accumulation on related equipment, connecting pipes, and other critical components within the system. When the dust accumulation reaches a certain level, it will cause blockages in the system, equipment, and pipes, severely hindering the normal flow of media within the system and the normal operation of the equipment. This obstruction of media flow will lead to an abnormal increase in the fan's operating load. The impeller will operate in a non-uniform airflow environment, generating irregular vibrations and airflow pulsations, which in turn will cause a sharp increase in fan noise. The original base noise, combined with the vibration noise, will result in high-decibel noise levels that significantly exceed industrial noise emission standards. This noise not only poses a direct threat to the hearing health of on-site operators, but long-term exposure to high-decibel noise environments may also cause dizziness, difficulty concentrating, and other problems, increasing the risk of production safety accidents.

[0026] like Figure 1 As shown, Figure 1 This application provides a schematic diagram of a filtration and noise reduction system for an embodiment; a filtration and noise reduction system for a fan inlet, the filtration and noise reduction system comprising a main body 100, a sound-absorbing component 200, and a filter component, wherein: like Figure 1 As shown, the main body 100 has a first end 101 detachably connected to the air inlet of the fan, and a second end 102 for air intake, with a working channel 103 provided between the first end 101 and the second end 102.

[0027] like Figure 1 As shown, the main body 100 serves as the basic carrier for system installation and airflow. The first end 101 of the main body 100 is connected to the fan inlet using a detachable method such as flange connection, snap-fit ​​connection or threaded connection. The appropriate connection structure can be selected according to the specifications and model of the fan inlet. For example, for large-diameter fans, a flange connection with a sealing gasket is used to ensure air tightness, and for small-diameter fans, a quick snap-fit ​​connection is used to improve installation efficiency. like Figure 1 As shown, the second end 102 of the main body 100 is the air inlet end, which can be designed as a straight cylindrical or gradually expanding structure according to the on-site installation space. The gradually expanding structure can increase the air intake area, reduce the airflow inlet velocity, and reduce the vortex noise generated by the high-speed impact of the airflow. like Figure 1 As shown, the working channel 103 between the first end 101 and the second end 102 has a smooth transition surface formed by polishing the inner wall, which avoids turbulence caused by local protrusions in the airflow in the channel. At the same time, the cross-sectional dimensions of the channel can be designed as circular or rectangular according to the rated air volume of the fan, to ensure that the airflow cross section matches the air intake requirements of the fan and reduce airflow resistance.

[0028] like Figure 1 As shown, the sound-absorbing component 200 is arranged in a ring on the inner wall of the working channel 103. The porosity of the sound-absorbing component 200 can be controlled between 80% and 90%, and energy dissipation can be achieved through multiple reflections and friction of sound waves in the pores. The perforation rate of the perforated protective plate can be set to 20%-30%, which can prevent the sound-absorbing material from being washed away by the airflow and does not hinder the sound waves from entering the sound-absorbing layer. In addition, the sound-absorbing component 200 is connected to the inner wall of the working channel 103 through a detachable slot. When the sound-absorbing material ages after long-term use, the sound-absorbing layer can be disassembled and replaced separately without replacing the entire main component 100, thus reducing maintenance costs.

[0029] like Figure 1 As shown, the filter assembly is arranged in the working channel 103, and the filter assembly is located between the sound absorption assembly 200 and the second end 102.

[0030] The filter assembly is arranged in the working channel 103 and located between the sound-absorbing assembly 200 and the second end 102, forming an airflow treatment path of "filtering first and then silencing". The filter assembly can be configured in parallel with different precision according to the diameter and concentration of dust particles. When the fan starts, the outside air enters the working channel 103 from the second end 102 of the main body 100 and first comes into contact with the filter assembly. When the airflow passes through the filter assembly, the dust particles are captured by the filter material due to inertial collision and interception effect, and the clean airflow continues to flow towards the first end 101. During this process, the airflow flows smoothly in the smooth working channel 103, reducing the generation of turbulent noise. The structural noise and airflow noise generated by the operation of the fan itself are transmitted into the working channel 103 and are absorbed in all directions by the sound-absorbing assembly 200 to prevent the noise from spreading outward. At the same time, since the filter assembly has intercepted the dust, the clean airflow will not accumulate dust in the impeller and casing after entering the fan, avoiding the loss of fan dynamic balance and increased operating load due to dust adhesion.

[0031] In an optional embodiment, the filtration and noise reduction system of this application is used for filtration and noise reduction at the inlet of a fan. The filtration and noise reduction system includes a main body 100, a sound-absorbing component 200, and a filter component. The main body 100 has a first end 101 detachably connected to the air inlet of the fan, and a second end 102 for air intake. A working channel 103 is provided between the first end 101 and the second end 102. The sound-absorbing component 200 is arranged in a ring on the inner wall of the working channel 103, and the filter component is arranged in the working channel 103. The filter component is located between the sound-absorbing component 200 and the second end 102.

[0032] like Figure 1As shown, this filtration and noise reduction system achieves integrated dust interception and noise control through the coordinated operation of the main body 100, the sound-absorbing component 200, and the filter component. The first end 101 of the main body 100 is detachably connected to the fan inlet, and the second end 102 is used for air intake. The working channel 103 between the two ends provides space for air circulation and operation. The sound-absorbing component 200 is arranged in a ring on the inner wall of the working channel 103, and the filter component is located within the working channel 103 between the sound-absorbing component 200 and the second end 102, forming an air handling path of "filtration first, then noise reduction".

[0033] When the fan starts running, outside air is naturally drawn into the working channel 103 from the second end 102 of the main body 100. It first comes into contact with the filter assembly located at the front of the channel. As the air passes through the filter assembly, the dust particles it contains are effectively intercepted, allowing only clean air to continue flowing along the working channel 103 towards the first end 101. This prevents dust from entering the fan and subsequent production systems, cutting off the problem of dust accumulation and blockage in systems, equipment, and pipes at the source. Simultaneously, as the air flows within the working channel 103, it is affected by airflow... Turbulence and friction against the channel walls generate flow noise, and the basic noise generated by the high-speed operation of the fan itself also propagates into the channel through the air inlet. The sound-absorbing component 200 can stably contact these noises. Through the absorption, reflection and dissipation of sound waves by the sound-absorbing material, the noise energy is greatly reduced. Moreover, since the filter component has intercepted dust, clean air entering the fan will not cause dust accumulation inside the fan. This avoids the additional noise caused by abnormal increase in fan load and aggravated impeller vibration due to dust accumulation, effectively avoiding the vicious cycle of "blockage, shutdown for cleaning, and noise accumulation".

[0034] Compared to the cumbersome process of shutting down furnaces, dismantling and rebuilding existing systems, and requiring complete shutdown for dismantling and cleaning, this filtration and silencing system allows for convenient replacement or cleaning of the filter components via the detachable main body 100 without system shutdown, significantly reducing maintenance and time costs. Simultaneously, it eliminates the need for additional independent filtration and silencing equipment, simplifying the system structure and reducing space requirements. On one hand, the filter components effectively intercept dust, preventing blockages in equipment and pipelines within the production system, thus completely avoiding system shutdowns caused by blockages, ensuring stable product output, and minimizing economic losses. On the other hand, the sound-absorbing components 200, combined with the stable operation of the fan resulting from dust interception, reduce the overall noise level to within industrial noise emission standards, protecting the hearing health of on-site operators, reducing the risk of noise-related safety accidents, and achieving stable, low-noise, and efficient operation of the production system.

[0035] like Figure 1 As shown, in an optional embodiment, the sound-absorbing component 200 is covered with a fixing mesh 201, which is fixedly connected to the working channel 103.

[0036] The fixed mesh 201 is configured according to the material characteristics of the sound-absorbing component 200 and the airflow movement law. The fixed mesh 201 can be detachably made of stainless steel woven mesh and fixed to the working channel 103 by spot welding or buckle. The fixed mesh 201 is completely attached to the inner wall of the working channel 103, which not only prevents the sound-absorbing cotton from shedding fibers under the scouring of high-speed airflow, but also does not hinder the sound waves from penetrating to the sound-absorbing layer. The fixed mesh 201 can also be made of galvanized perforated mesh and connected by bolts, which can buffer the vibration transmission during the operation of the fan and prevent the sound-absorbing component 200 from loosening and shifting due to long-term vibration. This ensures that the sound-absorbing area always covers the target area of ​​the working channel 103, solving the problems of easy wear and tear and frequent maintenance required by traditional sound-absorbing structures.

[0037] like Figure 1 As shown, in an optional embodiment, the sound-absorbing component 200 is configured as sound-absorbing cotton and is cylindrical. The arrangement of the cylindrical sound-absorbing cotton is optimized in combination with the airflow characteristics and sound wave propagation path of the working channel 103. When the airflow flows from the filter component to the first end 101, it can flow smoothly along the inner wall of the cylindrical sound-absorbing cotton, avoiding additional noise caused by local airflow eddies. At the same time, the cylindrical structure allows the sound waves to contact the sound-absorbing cotton to a greater extent and without obstruction when propagating in the working channel 103. Compared with the traditional arc-shaped spliced ​​sound-absorbing structure, the number of sound wave reflections increases by 2-3 times, and the noise energy dissipation efficiency is improved by more than 30%. Especially for the low- and medium-frequency noise during the operation of the fan, the noise reduction is higher, effectively filling the gap of insufficient control of specific frequency band noise by traditional sound-absorbing structures.

[0038] like Figure 1 As shown, in an optional embodiment, the fixing net 201 has uniformly distributed mesh holes, and the thickness of the sound-absorbing cotton is not less than the wall thickness of the main body 100.

[0039] The mesh of the fixed mesh 201 can be arranged in a regular hexagonal pattern, which makes the supporting ribs between the meshes more evenly stressed and prevents deformation under the impact of airflow. At the same time, the sound wave diffraction effect of the regular hexagonal mesh is weaker, allowing more sound waves to directly enter the sound-absorbing cotton. The thickness of the sound-absorbing cotton is not less than the wall thickness of the main body 100. On the one hand, this ensures that the sound absorption depth of the sound-absorbing cotton is sufficient to effectively absorb the sound waves that penetrate the fixed mesh 201 and prevent the sound waves from radiating outward from the main body 100 after passing through the sound-absorbing cotton. On the other hand, the thicker sound-absorbing cotton can fill the gap between the inner wall of the main body 100 and the fixed mesh 201, further blocking the transmission of fan structure noise to the outside through the main body 100.

[0040] like Figure 1As shown, in an optional embodiment, a guide plate 304 is provided between the sound-absorbing component 200 and the filter component. The guide plate 304 is optimized based on the movement trajectory of the airflow after it flows out of the filter component. The guide plate 304 can be made of ABS plastic or aluminum alloy and is integrally formed into an arc-shaped structure (the radius of curvature matches the inner diameter of the working channel 103). When the filtered clean airflow flows out of the filter component, local turbulence is easily generated due to changes in flow velocity. The guide plate 304 can guide the airflow to flow stably and avoid the airflow directly impacting the inner wall of the sound-absorbing component 200 to generate "impact noise". The surface of the guide plate 304 is polished, which can reduce the frictional resistance between the airflow and the plate, thereby reducing the operating energy consumption of the fan and taking into account both noise control and energy saving requirements.

[0041] like Figure 1 As shown, in an optional embodiment, the filter assembly includes a positioning ring 301 fixed within the working channel 103, the positioning ring 301 having a through hole at its center. The positioning ring 301 may be made of stainless steel and is fixed to the annular step on the inner wall of the working channel 103 by welding or detachable bolts. The positioning ring 301 provides the positioning base for the filter assembly, while the through hole maintains a stable airflow path.

[0042] like Figure 1 As shown, in an optional embodiment, the filtration assembly includes a plurality of filter bags 302, and the openings of the filter bags 302 are arranged facing the second end 102.

[0043] The number and specifications of filter bags 302 are configured in conjunction with the dust concentration and the size of the working channel 103. The openings of the filter bags 302 are arranged facing the second end 102. Based on the airflow intake direction, when outside air enters from the second end 102, the airflow can directly rush into the interior of the filter bags 302, causing the filter bags 302 to open naturally due to the airflow pressure. The filter surface of the filter bags 302 is fully expanded, increasing the filtration area. At the same time, the dust is trapped inside the filter bags 302. When cleaning, only compressed air needs to be blown in the opposite direction, and the dust can fall from the opening of the filter bags 302 under the action of gravity, improving the work efficiency.

[0044] like Figure 1 As shown, in an optional embodiment, the filter bag 302 is detachably fixed to the positioning ring 301 by bolts. The bolted connection provides a more uniform tightening force, preventing the filter bag 302 from loosening during fan vibration.

[0045] In an optional embodiment, the filter assembly further includes a filter screen 303 fixedly disposed on the positioning ring 301.

[0046] The filter screen 303 and the filter bag 302 form a "two-stage filtration" structure. The filter screen 303 is located on the side of the filter bag 302 near the second end 102. It can be made of stainless steel woven mesh or nylon monofilament. It is detachably connected to the positioning ring 301. All airflow is pre-filtered by the filter screen 303. When air enters from the second end 102, the filter screen 303 can first intercept large dust particles, preventing large dust particles or foreign objects from directly impacting the filter bag 302 and causing damage to the surface of the filter bag 302 or the filter. The filter pores are blocked, extending the service life of the filter bag 302. At the same time, the pre-filtration effect of the filter screen 303 can reduce the amount of dust adhering to the filter bag 302, reduce the frequency of dust removal of the filter bag 302, and reduce the number of short-term fan shutdowns caused by dust removal. In addition, the filter screen 303 is much easier to clean than the filter bag 302. It can be directly rinsed with water or blown with compressed air and reused, reducing the overall maintenance cost of the filter assembly and solving the problem of "easy wear and high maintenance cost" of traditional single filter bag 302 filtration.

[0047] like Figure 1 As shown, in an optional embodiment, the filtration and noise reduction system further includes an inlet section 305 fixedly connected to the first end 101, the other end of which is used to connect to the fan inlet. The inlet section 305 can be made of the same material as the main body 100. When the fan inlet specifications do not match the first end 101 of the main body 100, only the inlet section 305 of the corresponding specifications needs to be replaced, without reconfiguring the main body 100, which greatly improves the versatility of the system.

[0048] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of this utility model.

[0049] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0050] It should be understood that in the description of this utility model, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0053] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0054] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0055] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A filtration and noise reduction system for a fan inlet, characterized in that, The filtration and noise reduction system includes: The main body has a first end that is detachably connected to the air inlet of the fan, and a second end for air intake, with a working channel provided between the first end and the second end; The sound-absorbing components are arranged in a ring on the inner wall of the working channel; A filter assembly is arranged within the working channel, and the filter assembly is located between the sound-absorbing assembly and the second end.

2. The filtration and noise reduction system for a fan inlet as described in claim 1, characterized in that: The sound-absorbing component is covered with a fixing mesh, which is fixedly connected to the working channel.

3. The filtration and noise reduction system for a fan inlet as described in claim 2, characterized in that: The sound-absorbing component is made of sound-absorbing cotton and is cylindrical in shape.

4. The filtration and noise reduction system for a fan inlet as described in claim 3, characterized in that: The fixed mesh has evenly distributed mesh holes, and the thickness of the sound-absorbing cotton is not less than the wall thickness of the main body.

5. The filtration and noise reduction system for a fan inlet as described in claim 1, characterized in that: A guide plate is provided between the sound-absorbing component and the filter component.

6. The filtration and noise reduction system for a fan inlet as described in claim 1, characterized in that: The filter assembly includes a positioning ring fixed in the working channel, and the positioning ring has a through hole at its center.

7. The filtration and noise reduction system for a fan inlet as described in claim 6, characterized in that: The filtration assembly includes multiple filter bags, and the openings of the filter bags are arranged facing the second end.

8. The filtration and noise reduction system for a fan inlet as described in claim 7, characterized in that: The filter bag is detachably fixed to the positioning ring by bolts.

9. The filtration and noise reduction system for a fan inlet as described in claim 6, characterized in that: The filtration assembly also includes a filter screen fixedly mounted on the positioning ring.

10. The filtration and noise reduction system for a fan inlet as described in claim 1, characterized in that: The filtration and noise reduction system also includes an inlet section fixedly connected to the first end, and the other end of the inlet section is used to connect to the air inlet of the fan.

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