A V-bank air filter

Abstract

The application belongs to the technical field of air filters, and discloses a V-shaped air filter, which comprises a square sleeve, two side plate assemblies are fixedly connected to one side of the square sleeve, a filter core is fixedly connected to the inner side of the side plate assembly, a cover plate is fixedly connected to the inner side of the side plate assembly, and the V-shaped air filter further comprises a self-cleaning pre-filtering piece arranged in the interior of the square sleeve and used for prolonging the replacement period of the filter core. The porous pipe is driven to rotate by the motor and the speed reducer in a timing mode, the porous pipe drives the filter screen to cyclically rotate on the porous pipe and the driven rod, the motor drives the fan blade to rotate in the flow guide sleeve to generate negative pressure, the large-particle impurities and the flocculation retained by the filter screen are sucked through the fixed sleeve and the air inlet, the filter assembly is used for storing the retained impurities, the airflow passes through the circular sleeve and the fixed pipe, and the filter screen is backblown and dredged through the air outlet, so that the circulation and dust cleaning of the filter screen are realized, and the replacement period of the filter core is effectively prolonged.

Description

Technical Field

[0001] This invention belongs to the field of air filter technology, specifically a V-type air filter. Background Technology

[0002] Air filters are core equipment for air purification in ventilation and air conditioning systems, industrial cleanrooms, and residential fresh air systems. They rely on filter materials to intercept dust, particulate matter, and debris in the airflow, thereby reducing the dust content of the supplied air and ensuring air cleanliness. V-shaped air filters are a common structure in the filtration stage, with multiple filter elements fixed in a V-shape between the two side plates. This effectively increases the filtration area within a limited installation size and has the advantages of low air resistance and high dust holding capacity, making them widely used in various ventilation and purification systems.

[0003] Existing V-type air filters rely solely on the filter media of their internal filter element for air filtration after installation. Large impurities such as lint, debris, and large dust particles carried in the airflow can directly contact the windward side of the filter element. These large impurities will quickly adhere to and accumulate on the surface and in the folds of the filter media, causing premature and large-area blockage of the filter material in a short period of time. This leads to increased wind resistance and decreased ventilation, shortens the lifespan of the filter element, increases replacement costs, and also causes a continuous increase in the fan load. Summary of the Invention

[0004] To address the problems mentioned in the background section, the present invention provides a V-type air filter, comprising a square sleeve, two side plate assemblies fixedly connected to one side of the square sleeve, a filter element fixedly connected to the inner side of the side plate assembly, and a cover plate fixedly connected to the inner side of the side plate assembly, and further comprising: The self-cleaning pre-filter is located inside the square sleeve and is used to extend the filter cartridge replacement cycle. The self-cleaning pre-filter includes a motor fixedly connected to one side of the square sleeve. A reducer is fixedly connected to the top of the motor output shaft. The output end of the reducer extends into the interior of the square sleeve and is fixedly connected to a porous tube. A filter screen is fitted on the porous tube. A driven rod is movably connected inside the square sleeve. The filter screen is fitted on the driven rod. A fixed sleeve is fixedly connected to the bottom of the square sleeve. An air inlet is opened on one side of the fixed sleeve. A dust suction back-blowing component is provided at the bottom of the fixed sleeve. A filter assembly is provided inside the fixed sleeve. The tensioning component, located inside the square sleeve, is used to improve the filtration stability of the filter screen.

[0005] In the above technical solution, preferably, the side plate assembly includes a V-shaped side plate, the inside of which is provided with a filter element groove, the inside of which is provided with a condensate groove, a first glue injection surface, a second glue injection surface, a stabilizing rib fixedly connected inside which is provided, and a raised V-shaped cavity communicating with the filter element groove inside which is provided.

[0006] In the above technical solution, preferably, the dust suction back-blowing component includes a guide sleeve connected to the bottom of the fixed sleeve, the bottom end of the motor output shaft extends into the interior of the guide sleeve, and the bottom end of the motor output shaft is fixedly connected to a fan blade via a speed increaser; A circular sleeve is fixedly connected to the flow guide sleeve. The bottom of the circular sleeve is connected to a fixed tube through a connecting pipe. One end of the fixed tube extends into the interior of the porous tube. Exhaust ports are provided on one side and at the bottom of the fixed tube.

[0007] In the above technical solution, preferably, the filter assembly includes a support plate disposed on one side of the fixed sleeve, a square filter cylinder located inside the fixed sleeve is fixedly connected to one side of the support plate, and an inclined sleeve is fixedly connected inside the fixed sleeve, the inclined sleeve being fitted onto the square filter cylinder.

[0008] In the above technical solution, preferably, the tensioning assembly includes two sliding grooves formed inside the square sleeve, a slider is slidably connected inside the sliding groove, a support rod is fixedly connected to one side of the slider, the support rod is movably connected to the inside of the driven rod through a bearing, and a spring is fixedly connected to the bottom of the slider, the bottom of the spring is fixedly connected to the inside of the sliding groove.

[0009] In the above technical solution, preferably, a guide rod is vertically fixedly connected inside the slide groove, the spring is sleeved on the guide rod, and the slider is slidably connected to the guide rod.

[0010] In the above technical solution, preferably, the fixed sleeve is provided with an anti-backflow cleaning component, which includes a sealing sheet disposed inside the fixed sleeve. Three spring pieces are fixedly connected to the top of the sealing sheet, and one side of the spring pieces is fixedly connected to the inside of the fixed sleeve. Two scrapers are fixedly connected inside the square sleeve, and one side of the scrapers is in contact with the surface of the filter screen.

[0011] In the above technical solution, preferably, one side of the square sleeve is hinged to a baffle via a shaft, one side of the baffle is in contact with the surface of the support plate, and the bottom of the round sleeve is connected to a ball valve pipe.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses a motor and reducer to periodically drive the porous tube to rotate. The porous tube drives the filter screen to circulate on the porous tube and the driven rod. The motor drives the fan blades to rotate inside the guide sleeve through the speed increaser, generating negative pressure. Large particles and flocculent matter trapped by the filter screen are sucked in through the fixed sleeve and air inlet. The filter components collect and trap the impurities. The airflow passes through the circular sleeve and fixed tube and then through the exhaust port to backflush and clear the filter screen, realizing the circulation and dust collection and cleaning of the filter screen. The pre-interception of debris prevents the filter element from becoming clogged too early and effectively extends the filter element replacement cycle, reducing maintenance frequency and consumable costs.

[0013] Furthermore, after prolonged operation, the filter screen tends to loosen and elongate, resulting in insufficient tension. This causes slippage inside the filter screen during the rotation of the porous tube, leading to misalignment during dust collection and reduced filtration stability and cleaning effectiveness. However, by designing a tensioning assembly with a sliding groove, slider, and support rod, the spring continuously pushes the slider upward, causing it to slide upward along the groove. The slider, through the support rod, drives the driven rod to move upward synchronously, tightening the filter screen. This automatically compensates for the loosening and elongation of the filter screen during long-term operation, maintaining the filter screen tension, preventing slippage, ensuring reliable transmission between the filter screen and the porous tube, and improving filtration stability during operation.

[0014] Furthermore, after vacuuming stops, the dust accumulated inside the fixed sleeve is easily stirred up by airflow disturbances and flows back up, and the impurities adhering to the filter surface cannot be completely removed, affecting the cleaning effect. However, through the structural design of the sealing plate, spring plate, and scraper in the anti-backflow cleaning component, under normal vacuuming conditions, the negative pressure of the airflow causes the sealing plate to deflect and open the passage, and the spring plate deforms and stores force simultaneously; after vacuuming stops and the negative pressure disappears, the spring plate rebounds and causes the sealing plate to reset and close, preventing the dust accumulated inside the fixed sleeve from flowing back up and being stirred up, thus avoiding secondary contamination of the filter. When the filter is circulating, the scraper continuously adheres to the surface of the filter, scraping off the debris adhering to the surface of the filter. This, combined with the vacuuming action, achieves double cleaning, making the cleaning more thorough. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the sleeve of the present invention; Figure 3 This is a cross-sectional schematic diagram of the sleeve of the present invention; Figure 4 This is a cross-sectional schematic diagram of the flow guide sleeve of the present invention; Figure 5 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the tensioning component of the present invention; Figure 7 This is a cross-sectional schematic diagram of the fixing tube of the present invention; Figure 8 This is a schematic diagram of the side panel assembly of the present invention.

[0016] In the diagram: 1. Square sleeve; 2. Side panel assembly; 21. V-shaped side panel; 22. Filter cartridge groove; 23. Condensate tank; 24. Injection surface one; 25. Injection surface two; 26. Reinforcing rib; 27. Raised V-shaped cavity; 3. Filter cartridge; 4. Cover plate; 5. Self-cleaning pre-filter; 51. Motor; 52. Reducer; 53. Porous tube; 54. Filter screen; 55. Driven rod; 56. Fixing sleeve; 57. Air inlet; 58. Dust suction backflushing component; 581. Flow guide sleeve; 582. Fan blade; 583. Round sleeve; 584. Fixed pipe; 585. Exhaust port; 59. Filter assembly; 591. Support plate; 592. Square filter cartridge; 593. Inclined sleeve; 6. Tensioning assembly; 61. Slide groove; 62. Slider; 63. Support rod; 64. Spring; 7. Guide rod; 8. Anti-backflow cleaning component; 81. Sealing plate; 82. Spring; 83. Scraper; 9. Baffle; 10. Ball valve pipe. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figures 1 to 4 As shown, the present invention provides a V-type air filter, including a square sleeve 1, two side plate assemblies 2 fixedly connected to one side of the square sleeve 1, a filter element 23 fixedly connected to the inner side of the side plate assembly 2, and a cover plate 4 fixedly connected to the inner side of the side plate assembly 2, and further including: The self-cleaning pre-filter element 5 is installed inside the square sleeve 1 to extend the replacement cycle of the filter element 23. The self-cleaning pre-filter 5 includes a motor 51 fixedly connected to one side of the square sleeve 1. A reducer 52 is fixedly connected to the top of the output shaft of the motor 51. The output end of the reducer 52 passes through the inside of the square sleeve 1 and is fixedly connected to a porous tube 53. A filter screen 54 is sleeved on the porous tube 53. A driven rod 55 is movably connected inside the square sleeve 1. The filter screen 54 is sleeved on the driven rod 55. A fixed sleeve 56 is fixedly connected to the bottom of the square sleeve 1. An air inlet 57 is opened on one side of the fixed sleeve 56. A dust suction back-blowing component 58 is provided at the bottom of the fixed sleeve 56. A filter assembly 59 is provided inside the fixed sleeve 56. Tensioning component 6, located inside the square sleeve 1, is used to improve the filtration stability of filter screen 54.

[0019] Specifically, the reducer 52 is a worm gear reducer, and the filter screen 54 is a nylon filter screen; the motor 51 is a high-torque motor 51, which is electrically connected to an external time relay, and the time relay can control the motor 51 to start at a time; the motor 51 drives the filter screen 54 to rotate through the reducer 52 and the porous tube 53, and works in conjunction with the dust suction back-blowing component 58 to simultaneously complete the suction and cleaning of impurities, intercepting large particles of debris in the airflow in the front, avoiding premature large-area clogging of the filter element 23, effectively extending the replacement cycle of the filter element 23, and reducing maintenance costs.

[0020] like Figure 1 and Figure 8 As shown, the side plate assembly 2 includes a V-shaped side plate 21, with a filter element groove 22 inside the V-shaped side plate 21, a condensate groove 23 on the V-shaped side plate 21, an injection surface 24 on the V-shaped side plate 21, an injection surface 25 on the V-shaped side plate 21, a stabilizing rib 26 fixedly connected inside the V-shaped side plate 21, and a raised V-shaped cavity 27 communicating with the filter element groove 22 inside the V-shaped side plate 21.

[0021] Specifically, one side of the inner wall of the filter element groove 22 has a mesh structure. The mesh structure increases the contact area between the adhesive and the V-shaped side plate 21, enhancing the adhesion and stability of the adhesive to the filter element 23. The V-shaped side plate 21 is provided with a mesh cavity. The side plate assembly 2 is reinforced with stabilizing ribs 26 to strengthen the structure. The condensate drain 23 guides condensate to prevent the filter material from getting damp. When installing the filter element 23, it can be fixed with adhesive. The adhesive can be squeezed onto the first adhesive injection surface 24 and the second adhesive injection surface 25 as needed. Since some adhesives are relatively expensive, when the quality requirements are low, the adhesive can be injected onto the first adhesive injection surface 24. When the quality requirements are high, the adhesive can be injected onto the second adhesive injection surface 25. This allows one V-shaped side plate 21 to meet two adhesive injection needs. The filter element 23 and the V-shaped side plate 21 are more firmly bonded, and the overall air is less prone to leakage during the air filtration process.

[0022] like Figures 3 to 5 As shown, the vacuum back-blowing component 58 includes a guide sleeve 581 connected to the bottom of the fixed sleeve 56, the bottom end of the output shaft of the motor 51 extends into the interior of the guide sleeve 581, and the bottom end of the output shaft of the motor 51 is fixedly connected to a fan blade 582 via a speed increaser. A circular sleeve 583 is fixedly connected to the flow guide sleeve 581. The bottom of the circular sleeve 583 is connected to a fixed tube 584 through a connecting pipe. One end of the fixed tube 584 extends into the interior of the porous tube 53. An exhaust port 585 is provided on one side and at the bottom of the fixed tube 584.

[0023] Specifically, the speed increaser is a gear speed increaser; one end of the connecting tube is located at the bottom of the circular sleeve 583, and the other end is located on the side of the fixed sleeve 56 away from the motor 51. The fixed tube 584 can support the porous tube 53 through the fixed sleeve 56 to prevent the porous tube 53 from being unstable due to only one side support. Several vent holes are opened on the porous tube 53. The air discharged from the exhaust port 585 will back-blow the filter screen 54 through the vent holes. At the same time, one exhaust port 585 is aligned with the bottom of the scraper 83, which can blow the impurities at the bottom of the scraper 83 into the air inlet 57. In use, the output shaft of the motor 51 drives the fan blade 582 through the speed increaser to generate negative pressure to suck up impurities. The airflow is introduced into the fixed tube 584 through the circular sleeve 583 and the connecting tube, and is output from the exhaust port 585 to achieve back-blowing and unblocking of the filter screen 54. The single power synchronously completes dust suction and unblocking, with a compact structure and high efficiency.

[0024] like Figures 2 to 5 As shown, the filter assembly 59 includes a support plate 591 disposed on one side of the fixed sleeve 56. A square filter cartridge 592 located inside the fixed sleeve 56 is fixedly connected to one side of the support plate 591. An inclined sleeve 593 is fixedly connected inside the fixed sleeve 56 and is sleeved on the square filter cartridge 592.

[0025] Specifically, the square filter cartridge 592 is a metal filter cartridge. The square filter cartridge 592 filters and traps dust and debris in the dust collection airflow. The inclined sleeve 593 guides the airflow to contact the square filter cartridge 592 evenly, improving the dust collection and filtration efficiency. The support plate 591 facilitates the disassembly and maintenance of the square filter cartridge 592, ensuring the continuous and stable operation of the dust collection chamber.

[0026] like Figure 2 and Figure 6 As shown, the tensioning assembly 6 includes two slide grooves 61 opened inside the square sleeve 1. A slider 62 is slidably connected inside the slide groove 61. A support rod 63 is fixedly connected to one side of the slider 62. The support rod 63 is movably connected to the inside of the driven rod 55 through a bearing. A spring 64 is fixedly connected to the bottom of the slider 62. The bottom of the spring 64 is fixedly connected to the inside of the slide groove 61.

[0027] Specifically, the spring 64 continuously pushes the slider 62 upward, causing the slider 62 to slide upward along the slide groove 61. The slider 62 drives the driven rod 55 to move upward synchronously through the support rod 63, tightening the filter screen 54 upward. This automatically compensates for the relaxation and elongation of the filter screen 54 during long-term operation, maintains the tension of the filter screen 54, prevents the filter screen 54 from slipping, ensures reliable transmission between the filter screen 54 and the porous tube 53, and improves the filtration stability of the filter screen 54 during operation.

[0028] like Figure 6 As shown, a guide rod 7 is vertically fixed inside the slide groove 61, a spring 64 is sleeved on the guide rod 7, and a slider 62 is slidably connected to the guide rod 7.

[0029] Specifically, the guide rod 7 can precisely guide and limit the sliding path of the slider 62 in a straight line, avoiding problems such as lateral deviation and jamming of the slider 62 under the action of the elastic force and tension reaction force of the spring 64. At the same time, it can constrain the extension and contraction path of the spring 64, ensuring that the spring 64 is subjected to uniform force and does not bend or deviate, and ensuring long-term stability of the tension force.

[0030] like Figure 5 As shown, the fixed sleeve 56 is provided with an anti-backflow cleaning component 8. The anti-backflow cleaning component 8 includes a sealing sheet 81 disposed inside the fixed sleeve 56. Three spring pieces 82 are fixedly connected to the top of the sealing sheet 81. One side of the spring pieces 82 is fixedly connected to the inside of the fixed sleeve 56. Two scrapers 83 are fixedly connected inside the square sleeve 1. One side of the scraper 83 is in contact with the surface of the filter screen 54.

[0031] Specifically, the two scrapers 83 can block and seal the gap between the filter screen 54 and the V-shaped side plate 21. Under normal vacuuming conditions, the negative pressure of the airflow causes the sealing plate 81 to deflect and open the passage, and the spring plate 82 deforms and stores power simultaneously. After the vacuuming stops and the negative pressure disappears, the spring plate 82 rebounds and causes the sealing plate 81 to reset and close, preventing the dust accumulated inside the fixed sleeve 56 from flowing back and being raised, thus avoiding secondary pollution of the filter screen 54. When the filter screen 54 is running in a cycle, the scraper 83 continuously adheres to the surface of the filter screen 54, scraping off the debris adhering to the surface of the filter screen 54. This, combined with the vacuuming action, achieves double cleaning and makes the cleaning more thorough.

[0032] like Figures 1 to 3 As shown, a baffle 9 is hinged to one side of the square sleeve 1 via a shaft, and one side of the baffle 9 is in contact with the surface of the support plate 591. A ball valve pipe 10 is connected to the bottom of the round sleeve 583.

[0033] Specifically, the baffle 9 is hinged to one side of the square sleeve 1 via a shaft, and can be opened and closed flexibly. When opened, it is convenient for staff to remove the square filter cartridge 592. The ball valve pipe 10 is connected to the bottom of the round sleeve 583. The air flow rate through the round sleeve 583 and the connecting pipe into the fixed pipe 584 can be adjusted by the valve core opening, thereby precisely controlling the back-blowing exhaust volume of the exhaust port 585 on the fixed pipe 584, adapting to the back-blowing and unblocking needs of the filter screen 54 under different dust accumulation levels, and ensuring that the back-blowing force is moderate and stable.

[0034] Working principle and usage process of this invention: When in use, this device is installed at the air inlet 57 of the external air supply equipment. When air is drawn in, the airflow passes through the filter screen 54. Large impurities such as cotton fibers, debris, and large dust particles carried in the airflow are intercepted and retained by the filter screen 54, completing the primary pre-filtration. The pre-filtered airflow continues to flow backward and enters the filter element 23 area. After fine filtration by the V-shaped filter element 23, the clean airflow is sent out from the air outlet side of the air supply equipment. When a certain amount of impurities accumulate on the surface of the filter screen 54, the motor 51 starts at a set time. The top of the output shaft of the motor 51 is reduced by the reducer 52 and drives the porous tube 53 to rotate. The porous tube 53 drives the filter screen 54 to circulate between the porous tube 53 and the driven rod 55 by friction, so that the screen surface with attached impurities gradually rotates to the cleaning station below. At the same time, the bottom of the output shaft of the motor 51 is accelerated by the speed increaser, which drives the fan blade 582 to rotate at high speed in the guide sleeve 581 to generate negative pressure. The negative pressure draws in large particles of impurities and flocculent matter through the air inlet 57. After the dust-laden airflow enters the interior of the fixed sleeve 56, the dust and debris are filtered and trapped inside by the square filter cartridge 592, completing the air-dust separation. The clean airflow passes through the square filter cartridge 592 and flows through the guide sleeve 581 and the round sleeve 583 in sequence, and finally enters the fixed tube 584 and is blown in reverse from the exhaust port 585 to the inside of the filter screen 54, clearing the mesh of the filter screen 54. During the vacuuming process, the negative pressure inside the fixed sleeve 56 causes the sealing plate 81 to deflect and open the airflow passage, and the spring plate 82 deforms and stores energy in sync. When the motor 51 stops and the negative pressure disappears, the spring plate 82 rebounds and causes the sealing plate 81 to reset and close, preventing the dust accumulated inside the fixed sleeve 56 from being disturbed by the airflow and flowing back up, thus avoiding secondary contamination of the filter screen 54. Throughout the entire cycle of the filter screen 54, the scraper 83 remains in contact with the surface of the filter screen 54, continuously scraping away the residual fine dust and lint adhering to the surface of the filter screen 54. This, combined with the vacuuming back-blowing action, forms a dual cleaning effect, improving the thoroughness of the cleaning of the filter screen 54.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A V-shaped air filter, comprising a square sleeve (1), wherein two side plate assemblies (2) are fixedly connected to one side of the square sleeve (1), a filter element (23) is fixedly connected to the inner side of the side plate assembly (2), and a cover plate (4) is fixedly connected to the inner side of the side plate assembly (2), characterized in that, Also includes: The self-cleaning pre-filter (5) is installed inside the square sleeve (1) to extend the replacement cycle of the filter element (23); The self-cleaning pre-filter (5) includes a motor (51) fixedly connected to one side of the square sleeve (1). A reducer (52) is fixedly connected to the top of the output shaft of the motor (51). The output end of the reducer (52) extends into the interior of the square sleeve (1) and is fixedly connected to a porous tube (53). A filter screen (54) is fitted on the porous tube (53). A driven rod (55) is movably connected inside the square sleeve (1). The filter screen (54) is fitted on the driven rod (55). A fixed sleeve (56) is fixedly connected to the bottom of the square sleeve (1). An air inlet (57) is opened on one side of the fixed sleeve (56). A dust suction back-blowing component (58) is provided at the bottom of the fixed sleeve (56). A filter assembly (59) is provided inside the fixed sleeve (56). Tensioning component (6), located inside the square sleeve (1), is used to improve the filtration stability of filter screen (54).

2. A V-type air filter according to claim 1, characterized in that: The side plate assembly (2) includes a V-shaped side plate (21), a filter element groove (22) is provided inside the V-shaped side plate (21), a condensate groove (23) is provided on the V-shaped side plate (21), an injection surface one (24) is provided on the V-shaped side plate (21), an injection surface two (25) is provided on the V-shaped side plate (21), a stabilizing rib (26) is fixedly connected inside the V-shaped side plate (21), and a raised V-shaped cavity (27) communicating with the filter element groove (22) is provided inside the V-shaped side plate (21).

3. A V-type air filter according to claim 1, characterized in that: The dust suction back-blowing component (58) includes a flow guide sleeve (581) connected to the bottom of the fixed sleeve (56), the bottom end of the output shaft of the motor (51) extends into the interior of the flow guide sleeve (581), and the bottom end of the output shaft of the motor (51) is fixedly connected to a fan blade (582) via a speed increaser. A circular sleeve (583) is fixedly connected to the flow guide sleeve (581). The bottom of the circular sleeve (583) is connected to a fixed tube (584) through a connecting pipe. One end of the fixed tube (584) extends into the interior of the porous tube (53). An exhaust port (585) is provided on one side and at the bottom of the fixed tube (584).

4. A V-type air filter according to claim 3, characterized in that: The filter assembly (59) includes a support plate (591) disposed on one side of the fixed sleeve (56), a square filter cylinder (592) located inside the fixed sleeve (56) is fixedly connected to one side of the support plate (591), and an inclined sleeve (593) is fixedly connected inside the fixed sleeve (56), the inclined sleeve (593) is sleeved on the square filter cylinder (592).

5. A V-type air filter according to claim 1, characterized in that: The tensioning assembly (6) includes two grooves (61) inside the square sleeve (1). A slider (62) is slidably connected inside the groove (61). A support rod (63) is fixedly connected to one side of the slider (62). The support rod (63) is movably connected to the inside of the driven rod (55) through a bearing. A spring (64) is fixedly connected to the bottom of the slider (62). The bottom of the spring (64) is fixedly connected to the inside of the groove (61).

6. A V-type air filter according to claim 5, characterized in that: The guide rod (7) is vertically fixed inside the slide groove (61), the spring (64) is sleeved on the guide rod (7), and the slider (62) is slidably connected to the guide rod (7).

7. A V-type air filter according to claim 1, characterized in that: The fixed sleeve (56) is provided with an anti-backflow cleaning component (8), which includes a sealing sheet (81) disposed inside the fixed sleeve (56). Three spring pieces (82) are fixedly connected to the top of the sealing sheet (81). One side of the spring piece (82) is fixedly connected to the inside of the fixed sleeve (56). Two scrapers (83) are fixedly connected inside the square sleeve (1). One side of the scraper (83) is in contact with the surface of the filter screen (54).

8. A V-type air filter according to claim 4, characterized in that: A baffle (9) is hinged to one side of the square sleeve (1) via a shaft. One side of the baffle (9) is in contact with the surface of the support plate (591). A ball valve pipe (10) is connected to the bottom of the round sleeve (583).

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