An easy-to-clean pre-filter

Abstract

This utility model relates to an easy-to-clean primary filter device, belonging to the technical field of exhaust gas treatment filtration devices. The easy-to-clean primary filter device includes: a processing box, inside which an axial fan is fixedly installed; an air inlet and an air outlet are fixedly installed on both sides of the processing box, respectively; and a filter cleaning mechanism, a telescopic filter cleaning mechanism for convenient cleaning of the primary filter components, disposed inside the processing box. The filter cleaning mechanism includes a filter frame fixedly installed inside the processing box, and a cleaning component is disposed inside the filter frame. The cleaning component can detect the wind speed of the filter frame and automatically trigger vibration cleaning when it descends, promptly shaking off adhering dust, maintaining permeability and reducing wind resistance, thereby reducing energy consumption and extending the life of the axial fan. The collection component simultaneously sucks in the shaken-off impurities, avoiding secondary dust generation and improving cleaning efficiency and purification effect.

Description

Technical Field

[0001] This utility model relates to the technical field of filtration devices for exhaust gas treatment, and in particular to a pre-filter device that is easy to clean. Background Technology

[0002] In enclosed transportation spaces such as tunnels and underground parking garages, vehicle exhaust causes particulate matter and harmful components in the air to accumulate rapidly. To improve air quality, a pre-filter is often installed at the front end of the purification system to intercept large dust particles and impurities, preventing them from directly entering the subsequent fine filter unit, thereby extending the service life of the subsequent filter.

[0003] Most existing primary filter devices adopt a fixed filter structure. Although it can play a certain role in throttling, it is prone to airflow blockage due to excessive dust accumulation during long-term use, which in turn increases system energy consumption and operating resistance. Currently, cleaning of primary filters mostly relies on manual disassembly or periodic replacement, which is not only cumbersome and costly to maintain, but also prone to generating secondary dust during the cleaning process, causing secondary pollution to the environment. Utility Model Content

[0004] Therefore, it is necessary to provide an easy-to-clean primary filter device, which is mainly composed of fixed filter screens that are prone to dust accumulation and clogging after long-term use, leading to increased airflow resistance and energy consumption. Cleaning mainly relies on manual disassembly or replacement, which is cumbersome, costly, and prone to generating secondary dust and causing environmental pollution.

[0005] An easy-to-clean primary filter device includes: a treatment box, an axial fan fixedly installed inside the treatment box, and an air inlet and an air outlet fixedly installed on both sides of the treatment box; a filter cleaning mechanism, a telescopic filter cleaning mechanism for convenient cleaning of the primary filter components disposed inside the treatment box; wherein, the filter cleaning mechanism includes a filter frame fixedly installed inside the treatment box, a cleaning component disposed inside the filter frame, and a collection component disposed outside the filter frame.

[0006] The cleaning component includes a filter screen disposed inside a filter frame. A first electric slide rail is disposed on one side of the filter screen. The first electric slide rail is fixedly connected to the inner wall of the filter frame. A vibrator is fixedly installed at the output end of the first electric slide rail. The output end of the vibrator is located on one side of the filter screen.

[0007] An impact plate is fixedly connected to the output end of the vibrator, and one side of the impact plate is in contact with the filter screen.

[0008] The side of the impact plate closest to the filter screen is set in an arc shape, and the impact plate is set in a strip shape.

[0009] A guide frame is provided on the other side of the filter screen, and the guide frame is fixedly connected to the inside of the filter frame.

[0010] The filter screen is slidably installed inside the filter frame, and a spring is fixedly installed between the filter screen and the guide frame.

[0011] A sealing sleeve is fixedly installed on the other side of the filter screen, and the other side of the sealing sleeve is fixedly connected to the guide frame.

[0012] A wind sensor is fixedly installed inside the processing box. An adsorption box and multiple air sensors are also fixedly installed inside the processing box. The sensing end of the wind sensor is located between the filter frame and the adsorption box. The multiple air sensors are located at the air inlet and one side of the axial fan, respectively.

[0013] The collection assembly includes a second electric slide rail fixedly installed on one side of the filter frame. A sealing telescopic belt is slidably installed inside the second electric slide rail, and a suction pipe is fixedly installed at the output end of the second electric slide rail.

[0014] Telescopic tubes are fixedly installed on both sides of the suction pipe, and both telescopic tubes are connected to the inside of the suction pipe. A suction pump is fixedly installed on the outside of the processing box. The suction end of the suction pump is fixedly connected to one of the telescopic tubes, and the output end of the suction pump is fixedly installed with a discharge pipe.

[0015] Beneficial effects

[0016] 1. The cleaning component can detect the wind speed of the filter frame and automatically trigger vibration cleaning when it descends, which can shake off the attached dust in time, maintain permeability and reduce wind resistance, thereby reducing energy consumption and extending the life of the axial fan; the collection component simultaneously sucks in the shaken-off impurities, avoids secondary dust, and improves cleaning efficiency and purification effect.

[0017] 2. The second electric slide rail drives the sealing telescopic belt to move the suction pipe back and forth, cleaning the dust on the surface of the filter screen at fixed points to ensure uniform coverage; at the same time, it keeps the seal to prevent impurities from entering the slide rail, and through the connection with the dust collection box or negative pressure component, it promptly sucks in the shaken dust to avoid secondary pollution. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the filter cleaning mechanism of this utility model;

[0021] Figure 3 This is a schematic diagram of the filter frame and suction pump structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the collection component and filter screen structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the vibrator and filter screen structure of this utility model.

[0024] Figure label:

[0025] 100. Processing box; 110. Axial fan; 120. Air sensor; 130. Adsorption box; 200. Air inlet; 210. Air outlet; 300. Filter cleaning mechanism; 310. Filter frame; 320. Cleaning component; 321. Filter screen; 322. First electric slide rail; 323. Vibrator; 324. Impact plate; 325. Guide frame; 326. Wind sensor; 327. Sealing sleeve; 328. Spring; 330. Collection component; 331. Second electric slide rail; 332. Sealing telescopic belt; 333. Suction pipe; 334. Telescopic pipe; 335. Suction pump. Detailed Implementation

[0026] 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 some, not all, of the 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.

[0027] The following is combined with Figures 1-5 This invention describes an easy-to-clean primary filter device.

[0028] In one embodiment, an easy-to-clean primary filter device includes: a processing box 100, an axial fan 110 fixedly installed inside the processing box 100, and an air inlet 200 and an air outlet 210 fixedly installed on both sides of the processing box 100; a filter cleaning mechanism 300, a telescopic filter cleaning mechanism 300 for convenient cleaning of the primary filter components, disposed inside the processing box 100; wherein, the filter cleaning mechanism 300 includes a filter frame 310 fixedly installed inside the processing box 100, a cleaning component 320 disposed inside the filter frame 310, and a collection component 330 disposed outside the filter frame 310.

[0029] In this embodiment, the cleaning component 320 detects the wind speed of the filter frame 310. When a decrease in wind speed is detected, the cleaning mode is automatically triggered, avoiding reliance on regular manual inspections and improving the intelligence of detection and maintenance. When vibrating, the cleaning component 320 effectively shakes off dust and impurities adhering to the surface of the filter screen 321, maintaining the permeability of the filter surface, reducing wind resistance, thereby reducing energy consumption and extending the service life of the axial fan 110. Simultaneously, the collection component 330 synchronously sucks in and collects the dust and impurities that fall during vibration, avoiding the problem of secondary dust dispersion during cleaning and improving cleaning efficiency and air purification effect.

[0030] It should be noted that existing primary filter devices typically include a treatment box 100, an axial fan 110, and filter components installed in the air intake channel. The treatment box 100 is used for fixed installation and to form an airflow channel, the axial fan 110 provides airflow power, and the filter components are used to trap particulate matter and impurities in the exhaust gas, forming the basic components of the primary filter device. The cleaning component 320 only activates vibration to clean dust accumulated on the filter screen surface when a decrease in filtration performance is detected, without changing the original interception function of the filter screen 321. The collection component 330 is used to suck in and collect the dust and impurities cleaned by vibration. It is independent of the airflow channel and does not change the operating path of the treatment box 100 and the fan. Therefore, the cleaning component 320 and the collection component 330 provide additional cleaning and collection functions without affecting the normal filtration and air supply of the primary filter device.

[0031] like Figure 3 , Figure 4 and Figure 5 As shown, the cleaning component 320 includes a filter screen 321 disposed inside the filter frame 310. A first electric slide rail 322 is disposed on one side of the filter screen 321. The first electric slide rail 322 is fixedly connected to the inner wall of the filter frame 310. A vibrator 323 is fixedly installed at the output end of the first electric slide rail 322. The output end of the vibrator 323 is located on one side of the filter screen 321.

[0032] In this embodiment, driven by the first electric slide rail 322, the vibrator 323 can move along the surface of the filter screen 321, thereby performing segmented vibration cleaning in different areas to ensure comprehensive and uniform cleaning coverage. The vibrator 323 generates high-frequency vibrations during operation, causing dust and impurities adhering to the surface of the filter screen 321 to quickly fall off, preventing prolonged accumulation that could increase wind resistance or reduce filtration efficiency.

[0033] It should be noted that the filter screen 321 can be made of metal wire mesh, stainless steel woven mesh or high-strength synthetic fiber mesh. These materials have high mechanical strength and fatigue resistance, and can maintain a stable structure during long-term airflow impact and repeated cleaning, without being damaged or deformed due to vibration.

[0034] The vibratory machine 323 can employ conventional industrial vibration devices such as eccentric motor vibrators, piezoelectric vibrators, or electromagnetic vibrators. Its output vibration frequency and amplitude are adjustable, and it achieves directional cleaning of different areas through cooperation with the first electric slide rail 322. Because the vibration amplitude of the vibratory machine 323 is controlled within a reasonable range, it is only used to shake off dust and will not generate excessive impact, thus preventing damage to the filter screen 321.

[0035] An impact plate 324 is fixedly connected to the output end of the vibrator 323, and one side of the impact plate 324 is in contact with the filter screen 321.

[0036] In this embodiment, when the vibrator 323 is started, the impact plate 324 will generate high-frequency reciprocating vibration and transmit the vibration force evenly to the surface of the filter screen 321, thereby effectively shaking off the dust and impurities attached to the mesh.

[0037] The side of the impact plate 324 closest to the filter screen 321 is set in an arc shape, and the impact plate 324 is set in a strip shape.

[0038] In this embodiment, the arc-shaped design can evenly disperse the force during the impact, avoiding sharp edges from causing local damage to the filter screen 321. At the same time, it allows the vibration force to form a smooth transition on the contact surface, improving the gentleness and stability of the impact. The strip structure of the impact plate 324 can form a linear contact under the drive of the vibrator 323, so that the cleaning action can be carried out segment by segment along the surface of the filter screen 321. This can reduce the excessive impact on the overall structure of the filter screen 321 while ensuring effective dust removal.

[0039] A guide frame 325 is provided on the other side of the filter screen 321, and the guide frame 325 is fixedly connected to the inside of the filter frame 310.

[0040] In this embodiment, the guide frame 325 forms a stable limiting boundary around the filter screen 321, so that the airflow can pass through the filtration area evenly, avoid bypass leakage, and improve the overall filtration efficiency and sealing performance.

[0041] The filter screen 321 is slidably installed inside the filter frame 310, and a spring 328 is fixedly installed between the filter screen 321 and the guide frame 325.

[0042] In this embodiment, the spring 328 can provide elastic support when the filter screen 321 is cleaned by the vibrator 323, so that the filter screen 321 can automatically reset after vibration or displacement, avoiding misalignment or loosening caused by long-term vibration; at the same time, the spring 328 can also buffer the instantaneous impact force of the vibrator 323 and the impact plate 324 on the filter screen 321, reducing the risk of stress concentration damage to the filter screen 321.

[0043] A sealing sleeve 327 is fixedly installed on the other side of the filter screen 321, and the other side of the sealing sleeve 327 is fixedly connected to the guide frame 325.

[0044] In this embodiment, the sealing sleeve 327 can form a tight fit between the filter screen 321 and the guide frame 325, thereby preventing the filter screen 321 from developing gaps due to vibration or airflow impact during operation, and preventing unfiltered air from bypassing the filter screen 321 and directly entering the air outlet 210.

[0045] A wind sensor 326 is fixedly installed inside the treatment box 100. An adsorption box 130 and multiple air sensors 120 are also fixedly installed inside the treatment box 100. The sensing end of the wind sensor 326 is located between the filter frame 310 and the adsorption box 130. The multiple air sensors 120 are located on one side of the air inlet 200 and the axial fan 110, respectively.

[0046] In this embodiment, the wind sensor 326 can monitor the speed and pressure difference of the airflow before and after the filter frame 310 in real time. When a significant decrease in wind speed or an increase in resistance is detected, it can determine that the filter screen 321 is severely dusty and trigger vibration cleaning, thereby achieving intelligent judgment and automatic triggering of cleaning. Multiple air sensors 120 are used to compare and detect the air quality at the air inlet 200 with the air state after the axial fan 110 output, which can accurately evaluate the filtration and purification effect and avoid the delay caused by relying solely on manual observation. The adsorption box 130 further collects and adsorbs the passing airflow, centrally storing the dust and impurities sucked in by the collection component 330, ensuring that no secondary dust is generated during the cleaning process.

[0047] It should be noted that the wind sensor 326 can be a differential pressure wind speed sensor or an impeller wind speed sensor. Its sensing end is located between the filter frame 310 and the adsorption box 130, and is used to detect the airflow speed or pressure difference changes before and after the filter screen 321 in real time.

[0048] The air sensor 120 can be an optical dust sensor, a gas concentration sensor, or a multi-functional environmental sensor, and is arranged near the air inlet 200 and the axial fan 110, respectively, to detect the concentration of particulate matter or the content of harmful components in the incoming and outgoing air.

[0049] like Figure 2 , Figure 3 and Figure 4 As shown, the collection component 330 includes a second electric slide rail 331 fixedly installed on one side of the filter frame 310. A sealing telescopic belt 332 is slidably installed inside the second electric slide rail 331, and a suction pipe 333 is fixedly installed at the output end of the second electric slide rail 331.

[0050] In this embodiment, the second electric slide rail 331 can drive the sealing telescopic belt 332 to move the suction pipe 333 back and forth within the surface area of ​​the filter screen 321, so that the suction pipe 333 can clean the dust falling from different positions in a targeted manner, avoiding uneven cleaning range and local residue. The sealing telescopic belt 332 can maintain a sealed fit with the second electric slide rail 331 during the sliding process to prevent impurities from entering the second electric slide rail 331. The suction pipe 333 is connected to the external dust collection box or negative pressure component, so that when the vibrator 323 cleans the filter screen 321, it can suck in and collect the dust that is shaken off in time to prevent it from being scattered again and causing secondary pollution.

[0051] Telescopic pipes 334 are fixedly installed on both sides of the suction pipe 333, and both telescopic pipes 334 are connected to the inside of the suction pipe 333. A suction pump 335 is fixedly installed on the outside of the processing box 100. The suction end of the suction pump 335 is fixedly connected to one side of the telescopic pipe 334, and the output end of the suction pump 335 is fixedly installed with a discharge pipe.

[0052] In this embodiment, the suction pump 335, during operation, forms a negative pressure channel with the suction pipe 333 through the telescopic tube 334, promptly sucking in the dust and impurities cleaned by the vibrator 323, thereby preventing secondary dust deposition inside the filter frame 310. The telescopic tubes 334 on both sides ensure that the suction pipe 333 remains unobstructed during movement driven by the second electric slide rail 331, providing both good flexibility and ensuring uniform and stable suction. The sucked-in dust, after being pressurized by the suction pump 335, is discharged through the discharge pipe and collected in the external dust collection box.

[0053] Working Principle: External air first enters the processing chamber 100 through the air inlet 200, and undergoes initial particulate matter interception through the internal filter frame 310. The filter screen 321 effectively traps larger dust and impurities in the vehicle exhaust, ensuring cleaner air entering the subsequent purification stages. The filtered airflow undergoes secondary collection and adsorption through the adsorption box 130, and is then discharged from the air outlet 210 driven by the axial fan 110, achieving air circulation and purification within the tunnel or garage. During long-term use, as dust gradually accumulates on the surface of the filter screen 321, the wind speed sensor 326 monitors the wind speed or pressure difference changes before and after the filter frame 310 in real time. When a decrease in airflow speed or an increase in resistance is detected, the cleaning component 320 is triggered. At this time, the first electric slide rail 322 drives the vibrator 323 to move along the surface of the filter screen 321, causing the impact plate 324 to vibrate at high frequency, causing the attached dust to be shaken off in stages. Spring 328 provides elastic support during vibration, allowing filter screen 321 to automatically reset after cleaning. Guide frame 325 and sealing sleeve 327 ensure that the filtered airflow does not swerve or leak. After the dust is shaken off, collection assembly 330 starts simultaneously. Second electric slide rail 331 drives sealing telescopic belt 332 to push suction pipe 333 reciprocating across the surface of filter screen 321, achieving point-to-point dust collection. Telescopic pipes 334 connected to both sides of suction pipe 333 ensure unobstructed communication with suction pump 335 during movement. The negative pressure generated by suction pump 335 draws in the shaken-off dust and discharges it through discharge pipe to an external dust collection box, preventing secondary dust dispersion and pollution. Simultaneously, air sensor 120, located near air inlet 200 and axial fan 110, compares and detects air quality, providing real-time feedback on filtration effectiveness.

[0054] It should be noted that the axial fan, the first electric slide rail, the air sensor, and the wind force sensor mentioned above are all devices with relatively mature existing technologies. The specific models can be selected according to actual needs. At the same time, the axial fan, the first electric slide rail, the air sensor, and the wind force sensor can be powered by the built-in power supply or by the mains power. The specific power supply method should be selected according to the situation, and will not be elaborated here.

[0055] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An easily cleanable primary filter device, characterized in that include: A processing box (100) is provided, wherein an axial fan (110) is fixedly installed inside the processing box (100), and an air inlet (200) and an air outlet (210) are fixedly installed on both sides of the processing box (100); A filter cleaning mechanism (300) is provided inside the treatment box (100) for convenient cleaning of the primary filter components. The filter cleaning mechanism (300) includes a filter frame (310) fixedly installed inside the processing box (100), a cleaning component (320) is provided inside the filter frame (310), and a collection component (330) is provided outside the filter frame (310).

2. The easy-to-clean primary filter device according to claim 1, characterized in that, The cleaning component (320) includes a filter screen (321) disposed inside the filter frame (310). A first electric slide rail (322) is disposed on one side of the filter screen (321). The first electric slide rail (322) is fixedly connected to the inner wall of the filter frame (310). A vibrator (323) is fixedly installed at the output end of the first electric slide rail (322). The output end of the vibrator (323) is located on one side of the filter screen (321).

3. The easy-to-clean primary filter device according to claim 2, characterized in that, The output end of the vibrator (323) is fixedly connected to an impact plate (324), and one side of the impact plate (324) is in contact with the filter screen (321).

4. The easy-to-clean primary filter device according to claim 3, characterized in that, The impact plate (324) is configured in an arc shape on the side near the filter screen (321), and the impact plate (324) is configured in a strip shape.

5. The easy-to-clean primary filter device according to claim 2, characterized in that, A guide frame (325) is provided on the other side of the filter screen (321), and the guide frame (325) is fixedly connected to the interior of the filter frame (310).

6. The easy-to-clean primary filter device according to claim 2, characterized in that, The filter screen (321) is slidably installed inside the filter frame (310), and a spring (328) is fixedly installed between the filter screen (321) and the guide frame (325).

7. The easy-to-clean primary filter device according to claim 2, characterized in that, A sealing sleeve (327) is fixedly installed on the other side of the filter screen (321), and the other side of the sealing sleeve (327) is fixedly connected to the guide frame (325).

8. The easy-to-clean primary filter device according to claim 1, characterized in that, A wind sensor (326) is fixedly installed inside the processing box (100). An adsorption box (130) and multiple air sensors (120) are also fixedly installed inside the processing box (100). The sensing end of the wind sensor (326) is located between the filter frame (310) and the adsorption box (130). The multiple air sensors (120) are located on one side of the air inlet (200) and the axial fan (110), respectively.

9. The easy-to-clean primary filter device according to claim 1, characterized in that, The collection component (330) includes a second electric slide rail (331) fixedly installed on one side of the filter frame (310), a sealing telescopic belt (332) is slidably installed inside the second electric slide rail (331), and a suction pipe (333) is fixedly installed at the output end of the second electric slide rail (331).

10. The easy-to-clean primary filter device according to claim 9, characterized in that, Telescopic pipes (334) are fixedly installed on both sides of the suction pipe (333), and both telescopic pipes (334) are connected to the inside of the suction pipe (333). A suction pump (335) is fixedly installed on the outside of the processing box (100). The suction end of the suction pump (335) is fixedly connected to one side of the telescopic pipe (334), and the output end of the suction pump (335) is fixedly installed with a discharge pipe.

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