Efficient low-noise air filtering device

Abstract

The utility model relates to a high-efficiency low-noise air filtering device, and aims to solve the problem of increased wind resistance caused by improvement of filtering efficiency in the prior art. The device comprises an air inlet (1), an air outlet (2), a main shell (3), a vortex former (4), a separation chamber (5), a filtering module (6) and an auxiliary channel (7). The vortex former (4) enables air to rotate through a spiral flow deflector (41), the separation chamber (5) settles particles through the expansion cavity effect, the particles are effectively intercepted through the double-layer composite filter material design of the filter module (6), and the auxiliary channel (7) distributes airflow to reduce wind resistance. Through the innovative structural design, the filtering efficiency is effectively improved, meanwhile, low noise and low wind resistance are guaranteed, and the air purifier is suitable for various occasions needing efficient air purification.

Description

Technical Field

[0001] This utility model belongs to the field of air filtration technology, specifically a high-efficiency, low-noise air filtration device. Background Technology

[0002] In the field of air filtration technology, with the continuous development of industrial production and daily life, the requirements for air quality are increasing. Traditional air filtration devices, in pursuit of high-efficiency filtration, often need to increase the density or number of filter media layers, which inevitably leads to increased airflow resistance. Increased airflow resistance not only reduces system energy efficiency but may also force the equipment to use more powerful fans to maintain the necessary airflow, thereby increasing energy consumption and operating costs.

[0003] In recent years, although the industry has attempted to optimize filtration performance by employing technologies such as nanofiber materials or multi-layer composite structures to reduce air resistance while maintaining high-efficiency filtration, these improvements still face numerous challenges in practical applications. In particular, when handling air containing large particles or complex pollutants such as oil mist, filter media clogging becomes more severe, further exacerbating air resistance and affecting the overall performance and lifespan of the filtration device.

[0004] Therefore, how to effectively reduce wind resistance and improve the energy efficiency of air filtration devices while ensuring high-efficiency filtration has become a key issue that urgently needs to be addressed in the field of air filtration technology. This not only relates to the operating efficiency and cost of the equipment, but also directly affects the actual effect of improving indoor and outdoor air quality and environmental protection. This utility model is proposed precisely to address this industry challenge, striving for breakthroughs in the research and development of high-efficiency, low-noise air filtration devices through innovative design and technological applications. Utility Model Content

[0005] This invention proposes a high-efficiency, low-noise air filtration device, aiming to solve the problem of increased wind resistance caused by increasing the density or number of filter media layers in existing technologies to improve filtration efficiency. Through innovative design of the filter structure, this invention ensures both high-efficiency filtration and effectively reduces wind resistance, thereby improving the overall system's energy efficiency and reducing energy consumption.

[0006] This utility model discloses a high-efficiency, low-noise air filtration device, comprising an air inlet, an air outlet, a main housing, a vortex generator, a separation chamber, a filter module, and auxiliary channels. Through a specific structural design, the airflow forms a vortex before entering the filter module, using centrifugal force to pre-separate larger particles, thereby reducing the probability of filter media clogging and decreasing air resistance. Simultaneously, auxiliary channels are designed around the main filter module to divert part of the airflow, further reducing the pressure difference through the filter media and achieving the goal of reducing overall air resistance.

[0007] Specific structural innovations:

[0008] Vortex Former

[0009] The vortex generator, positioned between the air inlet and the separation chamber, is a spiral guide vane structure. Based on a cylindrical shape, several evenly distributed spiral vanes are arranged around a cylindrical support, forming a multi-layered spiral channel. One end of the guide vane is fixedly connected to the air inlet, and the other end is connected to the inlet of the separation chamber. Air entering the vortex generator from the air inlet is spirally guided and gradually accelerates as it passes through, creating a strong rotating airflow. This structure utilizes the centrifugal force generated by the high-speed rotation of air to throw larger particles towards the outer wall, and then guides them to the settling tank below through gravity and inertia, thus achieving preliminary separation without a filter.

[0010] Furthermore, the spiral guide vane is made of wear-resistant composite material, such as polytetrafluoroethylene or carbon fiber reinforced material, to ensure its stability and durability during long-term operation. This material not only has excellent wear resistance but also good low-friction characteristics, resulting in less resistance when airflow passes through, while avoiding performance degradation due to particulate matter adhesion.

[0011] Separation chamber

[0012] The separation chamber, located after the vortex generator, gradually expands in diameter, causing the high-speed rotating airflow to decelerate rapidly upon entering the interior due to the increased space. This design utilizes the "expanded cavity" effect to effectively enhance the efficiency of particulate matter settling from the airflow. A settling trough at the bottom of the separation chamber collects larger particles separated from the air; this trough is connected to an external collection container via a detachable interface for easy periodic cleaning.

[0013] Furthermore, the inner wall of the settling tank is designed with multiple annular grooves, which can effectively guide particles to slide down the wall to the bottom, preventing secondary dust re-entrainment. At the same time, to prevent fine particles from continuing to rise with the airflow, a protective mesh plate is installed on the upper part of the separation chamber. The mesh plate has a pore size of less than 0.5 mm, which can effectively intercept tiny particles while ensuring a sufficiently high air permeability.

[0014] Main Filtering Module

[0015] The main filtration module is located above the separation chamber and includes a frame and multiple layers of composite filter media. Unlike traditional methods using a single material or simply stacking layers, this invention employs a double-layer composite filter media design. The first layer, near the air inlet, uses a low-density, high-porosity coarse fiber filter cloth to capture medium-sized particles. The second layer is a nanofiber membrane with a pore size of less than 0.1 micrometers, which can effectively intercept PM2.5 and even smaller fine particles.

[0016] It is worth noting that a certain gap is left between the two layers of filter media. This gap acts as a buffer, allowing the airflow after primary filtration to be evenly distributed onto the second layer of filter media, thereby preventing localized overload and clogging. In addition, the two layers of filter media are fixed to two detachable frames, one above the other. When the filter media needs to be replaced, only the corresponding frame needs to be removed, greatly improving the convenience of maintenance.

[0017] Auxiliary Channel

[0018] The auxiliary channels are located on both sides of the main filter module, with their inlets situated between the air inlet and the main housing, extending through the entire main housing to near the air outlet. These auxiliary channels primarily guide some of the air entering the equipment during operation to bypass the main filter module and discharge directly through the auxiliary side path, thereby reducing the total air volume entering the main filter module. This design effectively reduces the pressure difference across the filter media per unit area, allowing the remaining air entering the main filter module to pass through at a lower speed, increasing the total amount of air passing through the filter per unit time without significantly increasing air resistance.

[0019] To ensure that the airflow in the auxiliary channel does not carry excessive pollutants, a pre-filter section made of wire mesh is installed at its inlet to initially intercept large particles exceeding a certain size. Furthermore, to further control the pressure difference between the inside and outside of the auxiliary channel, a set of automatically regulating valves is designed. These valves are installed at the outlet of the auxiliary channel and automatically adjust their opening angle based on pressure changes detected inside the equipment to maintain pressure balance within the system.

[0020] air outlet

[0021] The air outlet is located at the top of the main housing and is fixedly connected to the housing by a soft silicone sealing ring to prevent air leakage caused by long-term vibration. The air outlet is equipped with sound-absorbing cotton with a corrugated cross-section structure, which effectively reduces noise generated when high-speed air is discharged while maintaining good air permeability. In addition, a set of directional adjustment blades is installed at the front end of the air outlet to control the direction of the discharged air and avoid direct impact on operators or the surrounding environment.

[0022] Working principle and operation process:

[0023] When polluted air enters the device through the inlet, it first passes through the vortex generator, where the air begins to rotate at high speed due to the helical guidance. During this process, large particles are subjected to strong centrifugal force, are thrown outwards, and deposit at the bottom of the separation chamber. Lighter, smaller particles, however, enter the main filtration module with the decelerated airflow. After passing through the coarse fiber filter cloth, most medium-sized particles are captured, while the remaining fine particles are effectively intercepted by the nanofiber membrane.

[0024] At the same time, a small proportion of the air that is not fully treated will bypass the main filter module through the auxiliary channel and be discharged directly after primary screening. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the high-efficiency, low-noise air filtration device of this utility model, showing the layout of the air inlet 1, air outlet 2, main housing 3, vortex generator 4, separation chamber 5, filter module 6 and auxiliary channel 7.

[0026] Figure 2 The diagram shows a detailed structure of the vortex generator 4, in which the spiral guide vane 41 is based on the cylindrical support body 42, and forms a multi-layer spiral channel by the evenly distributed spiral vanes. One end of the guide vane is fixedly connected to the air inlet 1, and the other end is connected to the inlet of the separation chamber 5.

[0027] Figure 3 This is a schematic diagram of the internal structure of the separation chamber 5, showing its gradually expanding inner diameter, as well as the settling trough 51 at the bottom and the protective mesh plate 52 at the top.

[0028] Figure 4 This is a cross-sectional structural diagram of the filter module 6, which includes a coarse fiber filter cloth 61 and a nanofiber membrane 62. A gap 63 is left between the two layers of filter material, and the filter material is fixed on a detachable frame 64.

[0029] Figure 5 The diagram shows the structure of the auxiliary channel 7, including its inlet 71, pre-filter coarse filtration zone 72, automatic regulating valve 73, and its connection with the main housing 3.

[0030] Figure 6 This is a detailed structural diagram of the air outlet 2, including sound-absorbing cotton 21 and direction adjustment blades 22.

[0031] Part Number List

[0032] 1. Air inlet; 2. Air outlet; 3. Main housing; 4. Vortex generator; 5. Separation chamber; 6. Filter module; 7. Auxiliary channel; 8. Spiral guide vane; 9. Cylindrical support; 10. Settling tank; 11. Protective mesh plate; 12. Coarse fiber filter cloth; 13. Nanofiber membrane; 14. Gap; 15. Detachable frame; 16. Auxiliary channel inlet; 17. Pre-filter coarse filtration area; 18. Automatic regulating valve; 19. Noise-absorbing cotton; 20. Direction adjusting blade; 21. Direction adjusting blade. Detailed Implementation

[0033] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and 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. Example 1

[0034] See also Figure 1 and Figure 2 This embodiment provides a high-efficiency, low-noise air filtration device, including an air inlet 1, an air outlet 2, a main housing 3, a vortex generator 4, a separation chamber 5, a filter module 6, and an auxiliary channel 7. Through innovative design, this device achieves both high-efficiency filtration and low wind resistance.

[0035] First, polluted air enters the device through inlet 1 and passes through vortex generator 4, which is located between inlet 1 and separation chamber 5. Vortex generator 4 employs a spiral guide vane 41 structure, based on a cylindrical support 42, with several evenly distributed spiral vanes arranged around it to form a multi-layered spiral channel. One end of the guide vane 41 is fixedly connected to inlet 1, and the other end is connected to the inlet of separation chamber 5. When air enters vortex generator 4, it begins to rotate at high speed due to the spiral guidance effect. During this process, large particles are subjected to strong centrifugal force, are thrown towards the outer wall, and deposited in the settling tank 51 located at the bottom of separation chamber 5.

[0036] Furthermore, to improve durability and wear resistance, the spiral guide vane 41 is made of polytetrafluoroethylene or carbon fiber reinforced material. These materials not only have excellent wear resistance but also good low-friction characteristics, resulting in less resistance to airflow and preventing performance degradation due to particulate matter adhesion.

[0037] Next, please refer to Figure 3When the high-speed rotating airflow enters the separation chamber 5, its inner diameter gradually expands, causing the high-speed rotating airflow to decelerate rapidly, thereby enhancing the efficiency of particulate matter settling from the airflow. Larger particles are guided to the settling tank 51, which is connected to an external collection container via a detachable interface for periodic cleaning. Furthermore, to prevent fine particles from continuing to rise with the airflow, a protective mesh plate 52 is installed on the upper part of the separation chamber 5. This mesh plate has a pore size of less than 0.5 mm, effectively intercepting tiny particles while ensuring sufficient air permeability.

[0038] See also Figure 4 After initial treatment, the air enters the main filtration module 6, which comprises two layers of composite filter media: the first layer near the inlet is a coarse fiber filter cloth 61, used to capture medium-sized particles; the second layer is a nanofiber membrane 62 with a pore size of less than 0.1 micrometers, which can effectively intercept PM2.5 and even smaller fine particles. A gap 63 is left between the two layers of filter media. This design allows the airflow after primary filtration to be evenly distributed onto the second layer of filter media, thus avoiding localized overload and clogging. Furthermore, the two layers of filter media are respectively fixed to two detachable frames 64, one above the other. When the filter media needs to be replaced, only the corresponding frame needs to be removed, greatly improving maintenance convenience.

[0039] The working principle is as follows: When polluted air enters the device through the air inlet 1, it first passes through the vortex generator 4. Due to the spiral guiding effect, the air begins to rotate at high speed. During this process, large particles are subjected to strong centrifugal force, are thrown to the outside, and deposited at the bottom of the separation chamber 5. The lighter, smaller particles enter the main filtration module 6 with the decelerated airflow, where they complete the final filtration under the dual action of the coarse fiber filter cloth 61 and the nanofiber membrane 62, thereby achieving a highly efficient purification effect. Example 2

[0040] See also Figure 1 and Figure 5 This embodiment provides an improved high-efficiency, low-noise air filtration device, the main feature of which is the addition of an auxiliary channel 7 around the main filter module 6 to further reduce wind resistance and improve overall energy efficiency.

[0041] The auxiliary channel 7 is located inside the main housing 3, parallel to the main filter module 6. Its inlet 71 is located between the air inlet 1 and the main housing 3, and extends through the entire main housing 3 to near the air outlet 2. During operation, a small proportion of incompletely treated air bypasses the main filter module 6 and is directly discharged through the auxiliary channel 7, thereby reducing the total amount of air entering the main filter module 6. This design is equivalent to reducing the pressure difference per unit area of ​​filter media, allowing the remaining air entering the main filter module 6 to pass through at a lower speed, increasing the total amount of air passing through the filter per unit time without significantly increasing air resistance.

[0042] To ensure that the circulating air in the auxiliary channel 7 does not carry excessive pollutants, a pre-filter 72 is installed at its inlet 71. The pre-filter 72 is made of wire mesh and can initially intercept large particles exceeding a certain size. In addition, to further control the pressure difference between the inside and outside of the auxiliary channel 7, a set of automatic regulating valves 73 is designed. These valves are installed at the outlet of the auxiliary channel 7 and automatically adjust their opening angle according to the pressure changes detected inside the equipment to maintain the pressure balance between the inside and outside of the system.

[0043] See also Figure 6 To reduce noise impact, the air outlet 2 has been optimized in this invention. The air outlet 2 is located at the top of the main housing 3 and is fixedly connected to the housing by a soft silicone sealing ring to prevent air leakage due to long-term vibration. Simultaneously, sound-absorbing cotton 21 is installed inside the air outlet 2. This sound-absorbing cotton has a corrugated cross-section structure, which can effectively reduce the noise generated by the high-speed exhaust air. Furthermore, a set of directional adjustment blades 22 are installed at the front end of the air outlet 2 to control the direction of the exhaust clean air, avoiding direct impact on operators or the surrounding environment.

[0044] The working principle is as follows: When polluted air enters the device through inlet 1, a small proportion of the air that has not been fully treated bypasses the main filter module 6 through auxiliary channel 7 and is directly discharged after pre-screening. Simultaneously, the pressure difference between the inside and outside of the system is dynamically adjusted by automatic regulating valve 73, ensuring the entire system maintains a stable operating state. The remaining majority of pollutants undergo pre-treatment via vortex generator 4 and separation chamber 5 according to the conventional process, and then pass through a double-layer composite filter material to complete the final purification process. During this process, the sound-absorbing cotton 21 and the directional regulating blades 22 work together to effectively reduce noise and optimize the exhaust direction, achieving efficient and quiet operation.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency, low-noise air filtration device, comprising an air inlet (1), an air outlet (2), a main housing (3), a vortex generator (4), a separation chamber (5), a filter module (6), and an auxiliary channel (7), characterized in that: The vortex generator (4) is located between the air inlet (1) and the separation chamber (5). It is shaped as a spiral guide vane (41). The guide vane is based on a cylindrical support (42) and is arranged around a number of evenly distributed spiral vanes to form a multi-layer spiral channel. One end of the guide vane is fixedly connected to the air inlet (1), and the other end is connected to the inlet of the separation chamber (5). It is used to make the incoming air form a vortex and use centrifugal force to pre-separate larger particles.

2. The high-efficiency, low-noise air filtration device according to claim 1, characterized in that: The separation chamber (5) is located after the vortex generator (4), and its inner diameter gradually expands, so that the high-speed rotating airflow decelerates rapidly after entering the internal area of ​​the separation chamber (5) due to the expansion of space. The bottom of the separation chamber is provided with a settling tank (51) for collecting larger particles separated from the air. The settling tank (51) is connected to an external collection container through a detachable interface for easy periodic cleaning.

3. The high-efficiency, low-noise air filtration device according to claim 1, characterized in that: The filter module (6) is located above the separation chamber (5) and includes a coarse fiber filter cloth (61) and a nanofiber membrane (62). A gap (63) is left between the two filter materials. The filter materials are fixed on a detachable frame (64) for capturing medium-sized particles and intercepting PM2.5 and smaller fine particles.

4. The high-efficiency, low-noise air filtration device according to claim 1, characterized in that: The auxiliary channel (7) is located on both sides of the main filter module (6). Its inlet (71) is located between the air inlet (1) and the main housing (3), and extends through the entire main housing to the vicinity of the air outlet (2). It is used to guide some of the air entering the equipment during the operation of the equipment to bypass the main filter module (6) and be discharged directly through the auxiliary path on the side, thereby reducing the total amount of air entering the main filter module.

5. The high-efficiency, low-noise air filtration device according to claim 1, characterized in that: The air outlet (2) is located at the top of the main housing (3) and is fixedly connected to the housing by a soft silicone sealing ring. It is equipped with sound-absorbing cotton (21) inside and a direction adjustment blade (22) is installed at the front end to control the direction of the exhaust air and avoid direct impact on the operator or the surrounding environment of the equipment.

6. The high-efficiency, low-noise air filtration device according to claim 1, characterized in that: The spiral guide vane (41) is made of wear-resistant composite material.

7. The high-efficiency, low-noise air filtration device according to claim 2, characterized in that: The settling tank (51) has multiple annular grooves on its inner wall, which can effectively guide particles to slide down the wall to the bottom and prevent secondary dust. A protective mesh plate (52) with a pore size of less than 0.5 mm is installed on the upper part of the separation chamber, which can effectively intercept tiny particles while ensuring a sufficiently high air permeability.

8. The high-efficiency, low-noise air filtration device according to claim 1, characterized in that: The auxiliary channel (7) is provided with a pre-coarse filtration zone (72) at the entrance. The pre-coarse filtration zone (72) is made of metal wire mesh, which can initially intercept large particles exceeding a certain size. The auxiliary channel is designed with a set of automatic regulating valves (73) at the outlet, which automatically adjust the opening angle according to the pressure changes detected inside the equipment to maintain the pressure difference balance inside and outside the system.

9. The high-efficiency, low-noise air filtration device according to claim 5, characterized in that: The sound-absorbing cotton (21) adopts a wavy cross-section structure, which can effectively reduce the noise generated when high-speed air is discharged, while maintaining good breathability.

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