Self-cleaning air filter

Abstract

The invention discloses a self-cleaning air filter, and belongs to the technical field of automobile parts. Aiming at the problems of low efficiency and local difference during self-cleaning treatment of the existing product, the invention provides the following technical scheme: the self-cleaning filter comprises a main shell part, a filter element assembly for filtering gas is placed in the main shell part, and a rear end part and a front end part are respectively mounted at two ends of the main shell part. The brushing cleaning assembly is arranged in the shell and then is matched with the driving assembly in the self-cleaning mechanism, so that when the filter element assembly is subjected to self-cleaning, on one hand, the airflow cleaning assembly in the self-cleaning mechanism performs reverse airflow jetting on the filter element assembly to realize pneumatic self-cleaning; on the other hand, the brush cleaning assembly is driven to slowly brush and clean the outer surface of the filter element assembly, the brush cleaning assembly and the brush cleaning assembly are combined, efficient cleaning of the filter element assembly is achieved, and an airflow cleaning assembly in the self-cleaning mechanism enables a spraying piece for spraying gas to rotate under the action of a driving assembly.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically a self-cleaning air filter. Background Technology

[0002] An air filter is a filtration structure that delivers clean outside air to the internal components. For internal combustion engine vehicles, it separates and filters out particulate matter from the atmosphere, providing clean air to the engine. Existing air filters have short maintenance intervals, and their filter element maintenance procedures are cumbersome and their structure complex. This leads to extended downtime for vehicles or equipment, resulting in high overall maintenance costs for the air filter.

[0003] A Chinese patent with authorization announcement number CN114810439B discloses a self-cleaning air filter for new energy vehicles, including an installation shell and a filter element assembly. The filter element assembly is located inside the installation shell and consists of an outer filter element and an inner filter element assembly.

[0004] Although the technical solution in the aforementioned patent document utilizes reverse gas flow to achieve self-cleaning of the filter element assembly, it still has the following drawbacks in actual operation: the self-cleaning of the filter element assembly relies entirely on the reverse flow of gas, which not only requires a long time to complete, but also results in regional differences in the self-cleaning effect of the filter element assembly due to the fixed position of the gas guiding tube during the cleaning process. This limited cleaning effect is not conducive to the use of subsequent products. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, this invention provides a self-cleaning air filter. By arranging a brush cleaning component inside the housing, which cooperates with the drive component in the self-cleaning mechanism, the filter element assembly undergoes self-cleaning. On one hand, the airflow cleaning component in the self-cleaning mechanism sprays reverse airflow onto the filter element assembly to achieve pneumatic self-cleaning. On the other hand, it drives the brush cleaning component to slowly brush and clean the outer surface of the filter element assembly. The combination of these two methods achieves efficient cleaning of the filter element assembly. Furthermore, the airflow cleaning component in the self-cleaning mechanism, under the action of the drive component, causes the jetting component of the sprayed gas to rotate, thereby achieving comprehensive and efficient pneumatic self-cleaning of the filter element assembly, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A self-cleaning air filter includes a main housing, inside which a filter element assembly for filtering gas is placed, and a rear end and a front end are respectively installed at both ends of the main housing, wherein a self-cleaning mechanism for reverse cleaning of the filter element assembly is provided in the front end. The main housing includes a housing, a brush cleaning assembly, and an inner ring. The brush cleaning assembly is located inside the housing. There are two inner rings, which are movably connected to both ends of the outer ring of the housing. The brush cleaning assembly includes a constraint plate and a positioning ring located on the inner wall of the housing. There are multiple constraint plates, which are arranged circumferentially on the inner wall of the housing. The positioning ring is located at the front end of the multiple constraint plates and is fixedly connected to the constraint plates. Each constraint plate is provided with a reciprocating screw inside. The two ends of the reciprocating screw pass through the corresponding housing wall of the constraint plate and are equipped with transmission gears. The front end of the reciprocating screw also passes through the positioning ring. A circular ring is rotatably connected to the front side of the positioning ring. An external toothed ring is provided on the outer ring of the circular ring. The external toothed ring meshes with the corresponding transmission gear. An arc-shaped brush plate for cleaning the filter element assembly is installed together among the multiple constraint plates. The self-cleaning mechanism includes an airflow cleaning component, a drive component, a micro air pump body, and a housing. The airflow cleaning component is rotatably connected to the interior of the front end. The drive component is located on the exterior of the front end and is used to drive the airflow cleaning component and the external gear ring to rotate. The micro air pump body and the housing are also located on the exterior of the front end. The housing is used to cover the drive component. The micro air pump body is connected to the airflow cleaning component through a pipe to provide cleaning gas.

[0007] As a further embodiment of the present invention, an air inlet pipe for gas entry is provided on the top shell wall of the housing, the air inlet pipe is bolted to an external air inlet pipe, and an air inlet control valve is provided on the external air inlet pipe. Two support frames are symmetrically arranged at the bottom of the outer ring of the main housing, and threads are provided on the outer ring shell walls at both ends of the housing. The two inner threaded rings are respectively threaded to the two ends of the housing. Each of the constraint plates has a rectangular groove inside, a reciprocating screw is located in the rectangular groove, and a moving block is threadedly connected to the reciprocating screw. The moving block is slidably connected to the corresponding rectangular groove. The arc-shaped brush plate includes multiple plates, which are arranged in the circumferential direction inside the shell and connected to the corresponding moving block.

[0008] As a further embodiment of the present invention, the rear end includes a rear end cover, a push ring, a carrying ring, a transmission gear ring, and a cleaning brush. The rear end cover is fitted onto the rear end shell wall of the housing and is threadedly connected to the corresponding inner ring. The push ring is located on the front side of the rear end cover and is used to push the filter element assembly placed in the main housing. Multiple support pillars are arranged along the circumferential direction on the rear shell wall of the push ring. The rear end of the support pillar is integrally set on the inner wall of the rear end cover. An annular groove is opened on the outer shell wall of the push ring, and the carrying ring is rotatably connected in the annular groove. The transmission gear ring and the cleaning brush are both arranged on the outer shell wall of the carrying ring. The cleaning brush includes multiple brushes distributed along the circumferential direction. The cleaning brush is used to clean the inner shell wall of the rear end cover. The transmission gear ring meshes with the corresponding transmission gear. Multiple dust discharge holes are provided on the peripheral wall of the rear end cover along the circumferential direction, and each dust discharge hole is equipped with a solenoid valve.

[0009] As a further embodiment of the present invention, the front end includes a front cover and a shaped sleeve, wherein the front cover is sleeved on the front shell wall of the housing and is threadedly connected to the corresponding inner ring. A circular hole is opened at the center of the front cover, and an exhaust pipe for gas emission is installed in the circular hole. The front end of the exhaust pipe is bolted to an external exhaust pipe, and an exhaust control valve is configured on the external exhaust pipe. The irregularly shaped sleeve is integrally set on the inner wall of the front cover and located around the circular hole, for contacting the air outlet port of the filter element assembly.

[0010] As a further embodiment of the present invention, the airflow cleaning assembly includes a fixed frame disposed inside the irregular sleeve, and a conical sleeve is rotatably connected to the center of the fixed frame via a bearing, and a plurality of spray elements are disposed on the conical sleeve along the circumferential direction. The spraying component includes an L-shaped tube disposed on the outer shell wall of a conical sleeve. A sleeve and an outer sleeve are fitted onto the L-shaped tube. A second wedge is integrally disposed on the outer shell wall of the sleeve. A first wedge is slidably connected to the inclined surface of the second wedge. The first wedge and the outer sleeve are connected by a support rod. A fixing ring located on the outer shell wall of the L-shaped tube is fixedly connected to the rear of the outer sleeve. Multiple slots are opened on the fixing ring along the circumferential direction. A guide rod is movably connected to each slot. The front ends of the multiple fixing rings are fixedly connected to the corresponding outer sleeve. A return spring located on the guide rod is sleeved between the outer sleeve and the fixing ring.

[0011] As a further embodiment of the present invention, the main body of the micro air pump includes a dual-axis motor mounted on the outer wall of the front end cover. Both output ends of the dual-axis motor are equipped with rotating shafts. The top end of the rotating shaft extends into the interior of the air outlet pipe and is equipped with a driving bevel gear. A driven bevel gear is located on the conical sleeve on the rear side of the driving bevel gear. The driven bevel gear meshes with the driving bevel gear.

[0012] As a further embodiment of the present invention, a second active bevel gear is installed at the bottom end of the shaft described below. A second driven bevel gear is provided on the rear side of the second active bevel gear and meshes with it. A transmission shaft is installed on the rear side of the second driven bevel gear. The rear end of the transmission shaft passes through the front end cover and is equipped with a drive gear. The drive gear meshes with the external gear ring for transmission.

[0013] As a further embodiment of the present invention, the miniature air pump body is disposed on the front outer wall of the front end cover, and the miniature air pump body and the conical sleeve are connected by a pipe. The pipe includes a bend, an air guide pipe and a rotating connector. The bend and the conical sleeve are connected by the rotating connector, and the top end of the bend extends to the outside of the air outlet pipe. The miniature air pump body and the bend are connected by the air guide pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are: By configuring a brush cleaning component inside the housing and cooperating with the drive component in the self-cleaning mechanism, the filter element assembly is self-cleaned. On the one hand, the airflow cleaning component in the self-cleaning mechanism sprays reverse airflow onto the filter element assembly to achieve pneumatic self-cleaning. On the other hand, the brush cleaning component drives the brush cleaning component to slowly brush and clean the outer surface of the filter element assembly. The combination of the two achieves efficient cleaning of the filter element assembly, shortens the time required for product self-cleaning, and improves the efficiency of self-cleaning.

[0015] The airflow cleaning component in the self-cleaning mechanism, driven by the drive component, causes the jetting gas to rotate, thereby achieving comprehensive and efficient pneumatic self-cleaning of the filter element assembly. This avoids localized differences in the filter element assembly after self-cleaning and ensures the subsequent performance of the product.

[0016] The outer sleeve inside the gas jet in the airflow cleaning assembly is adjusted by the centrifugal force generated by the rotation of the jet in conjunction with wedges one and two, thereby opening the gas jet orifice and achieving self-cleaning of the filter element assembly. When the jet stops moving, the outer sleeve can be reset by the action of the guide rod and the return spring, thus sealing the jet orifice. On the one hand, it prevents the tiny impurities carried in the flowing gas from entering the jet orifice and causing blockage. On the other hand, it prevents part of the airflow from being diverted through the jet orifice and affecting the flow of gas.

[0017] The brush cleaning component inside the housing also works in conjunction with the sweeping component at the rear end, so that the sweeping component moves synchronously while the brush cleaning component moves, thereby cleaning the ports of each solenoid valve used for dust removal and ensuring its dust removal effect. Attached Figure Description

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a self-cleaning air filter. Figure 1 ; Figure 2 A schematic diagram of the three-dimensional structure of a self-cleaning air filter. Figure 2 ; Figure 3 for Figure 1 Exploded view; Figure 4 for Figure 2 Exploded view; Figure 5 for Figure 3 Schematic diagram of the main shell structure; Figure 6 for Figure 4 Schematic diagram of the main shell structure; Figure 7 for Figure 5 A magnified schematic diagram of the local structure at point A; Figure 8 for Figure 3 A schematic diagram of the rear end structure; Figure 9 for Figure 4 A schematic diagram of the rear end structure; Figure 10 for Figure 8 A magnified schematic diagram of the local structure at point B; Figure 11 for Figure 3 A schematic diagram of the front end and the self-cleaning mechanism; Figure 12 for Figure 11 A schematic diagram of the axial side view structure; Figure 13 for Figure 11 A schematic diagram of the airflow cleaning component structure; Figure 14 for Figure 13 A magnified schematic diagram of the local structure at point C.

[0019] In the diagram: 1. Main shell; 11. Shell; 12. Constraint plate; 13. Positioning ring; 14. Reciprocating screw; 15. Transmission gear; 16. Circular ring; 17. External gear ring; 18. Internal gear ring; 19. Arc-shaped brush plate; 2. Filter element assembly; 3. Rear end; 31. Rear end cover; 32. Push ring; 33. Loading ring; 34. Transmission gear ring; 35. Cleaning brush; 4. Front end; 41. Front end cover; 42. Irregular sleeve; 5. Self-cleaning mechanism; 51. Airflow cleaning assembly; 5 11. Conical sleeve; 512. Injection component; 5121. L-shaped tube; 5122. Sleeve; 5123. Outer sleeve; 5124. Retaining ring; 5125. Guide rod; 5126. Wedge block one; 5127. Wedge block two; 52. Drive assembly; 521. Dual-axis motor; 522. Driven bevel gear one; 523. Driven bevel gear one; 524. Driven bevel gear two; 525. Driven bevel gear two; 526. Drive gear; 53. Miniature air pump body; 54. Housing. Detailed Implementation

[0020] Please see Figures 1-2In this embodiment of the invention, a self-cleaning air filter includes a main housing 1, inside which a filter element assembly 2 for filtering gas is placed, and a rear end 3 and a front end 4 are respectively installed at both ends of the main housing 1. The front end 4 is provided with a self-cleaning mechanism 5 for reverse cleaning of the filter element assembly 2. The rear end 3 and the front end 4 are conveniently disassembled and assembled in the main housing 1 to facilitate the inspection and maintenance of their internal structure, while the self-cleaning mechanism 5 provided on the front end 4 is used to perform self-cleaning treatment on the filter element assembly 2. Please see Figures 5-7 In this embodiment of the invention, the main shell 1 includes a shell 11, a brush cleaning assembly and an inner ring 18. The brush cleaning assembly is located inside the shell 11. There are two inner rings 18, which are movably connected to the two ends of the outer ring of the shell 11, and are used to assemble and connect the rear end 3 and the front end 4. The brush cleaning assembly includes a constraint plate 12 and a positioning ring 13 located on the inner wall of the housing 11. There are four constraint plates 12 arranged circumferentially on the inner wall of the housing 11. The positioning ring 13 is located at the front end of the four constraint plates 12 and is fixedly connected to the constraint plates 12. The four constraint plates 12 are used to support the filter element assembly 2, while the positioning ring 13 is used to position the installation position of the filter element assembly 2, which facilitates the installation and maintenance of the filter element assembly 2. Each constraint plate 12 is equipped with a reciprocating screw 14 inside. The two ends of the reciprocating screw 14 pass through the corresponding shell wall of the constraint plate 12 and are equipped with transmission gears 15. The front end of the reciprocating screw 14 also passes through a positioning ring 13. The front side of the positioning ring 13 is rotatably connected to a ring 16. An external toothed ring 17 is provided on the outer ring of the ring 16. The external toothed ring 17 meshes with the corresponding transmission gear 15 for transmission. Thus, when the external toothed ring 17 rotates, the transmission gears 15 meshing with it drive the corresponding reciprocating screw 14 to rotate. An arc-shaped brush plate 19 for cleaning the filter element assembly 2 is installed between multiple constraint plates 12. When multiple reciprocating screws 14 run synchronously, the arc-shaped brush plate 19 adjusts its displacement in the front and back directions accordingly. An air inlet pipe for gas entry is provided on the top shell wall of the housing 11. The air inlet pipe is bolted to an external air inlet pipe, and an air inlet control valve is provided on the external pipe. Two support frames are symmetrically arranged at the bottom of the outer ring of the main housing 1 for product assembly and placement. Threads are provided on the outer ring shell walls at both ends of the housing 11, and two internal threaded rings 18 are threaded to both ends of the housing 11. Annular grooves are provided on the outer ring shell walls at both ends of the housing 11. Multiple slots are provided in each annular groove along the circumferential direction. The slots are configured for the calibration and assembly of the rear end 3 and the front end 4. The annular grooves are configured so that the inner threaded ring 18 can smoothly achieve threaded connection when the rear end 3 and the front end 4 are assembled with the housing 11. Each constraint plate 12 has a rectangular groove inside, and the reciprocating screw 14 is located in the rectangular groove. A moving block is threadedly connected to the reciprocating screw 14. The moving block is slidably connected to the corresponding rectangular groove. There are four arc-shaped brush plates 19, which are arranged in the circumferential direction inside the housing 11 and connected to the corresponding moving blocks. The four arc-shaped brush plates 19 together form a circular structure, thereby brushing and cleaning the outer surface of the filter element assembly 2, accelerating the cleaning efficiency and effect of the filter element assembly 2. Please see Figures 5-7 and Figures 11-12 In this embodiment of the invention, the self-cleaning mechanism 5 includes an airflow cleaning component 51, a drive component 52, a micro air pump body 53, and a housing 54. The airflow cleaning component 51 is rotatably connected to the inside of the front end 4, and the drive component 52 is disposed outside the front end 4. It is used to drive the airflow cleaning component 51 and the external toothed ring 17 to rotate. The drive component 52 causes the airflow cleaning component 51 and the external toothed ring 17 to move, thereby realizing the comprehensive cleaning of the filter element assembly 2 while driving the brush cleaning component. The miniature air pump body 53 and the housing 54 are also located on the outside of the front end 4. The housing 54 is used to cover the drive assembly 52. ​​The miniature air pump body 53 is connected to the airflow cleaning assembly 51 through a pipe to provide cleaning gas.

[0021] Please see Figures 3-4 and Figures 8-10 In this embodiment of the invention, the rear end 3 includes a rear end cover 31, a push ring 32, a loading ring 33, a transmission gear ring 34, and a cleaning brush 35. The rear end cover 31 is sleeved on the rear end shell wall of the housing 11 and is threadedly connected to the corresponding inner threaded ring 18. Multiple locking strips are provided on the front end inner wall of the rear end cover 31 along the circumferential direction to adapt to the corresponding locking slots, thereby realizing precise loading between the rear end cover 31 and the housing 11. The push ring 32 is located on the front side of the rear cover 31 and is used to push the filter element assembly 2 placed in the main housing 1 to ensure the stability of the filter element assembly 2 in the main housing 1. Multiple support pillars are arranged along the circumferential direction on the rear shell wall of the push ring 32. The rear end of the support pillar is integrally set on the inner wall of the rear end cover 31. The number of support pillars ranges from three to twelve, and six are used in this embodiment. An annular groove is provided on the outer shell wall of the push ring 32, and the carrying ring 33 is rotatably connected in the annular groove. The transmission gear ring 34 and the cleaning brush 35 are both provided on the outer shell wall of the carrying ring 33. The cleaning brush 35 includes multiple brushes, which are distributed along the circumferential direction and are located behind the transmission gear ring 34. The cleaning brush 35 is used to clean the inner shell wall of the rear end cover 31, thereby cleaning each solenoid valve and ensuring its dust removal effect. The transmission gear ring 34 meshes with the corresponding transmission gear 15, thereby synchronously driving the rotation of the carrying ring 33 during the movement of the reciprocating screw 14. Multiple dust discharge holes are provided on the peripheral wall of the rear cover 31 along the circumferential direction, and each dust discharge hole is equipped with a solenoid valve.

[0022] Please see Figures 3-4 and Figures 11-14 In this embodiment of the invention, the front end 4 includes a front end cover 41 and a special-shaped sleeve 42. The front end cover 41 is sleeved on the front end shell wall of the housing 11 and is threadedly connected to the corresponding inner ring 18. Multiple locking strips are also provided on the rear end inner wall of the front end cover 41 along the circumferential direction to adapt to the corresponding locking slots. A circular hole is provided at the center of the front cover 41, and an exhaust pipe for gas discharge is installed in the circular hole. The front end of the exhaust pipe is bolted to an external exhaust pipe, and an exhaust control valve is provided on the external exhaust pipe. The external air outlet duct is also equipped with a gas dust detector body for detecting gas dust and an air volume sensor body for detecting gas air volume. If the dust content in the gas passing through the duct is higher than the preset value and the air volume is less than the preset value, the gas dust detector body and the air volume sensor body will send corresponding signals to the car control terminal. The program in the car control terminal will judge and find that the filter element assembly 2 in the product has a lot of dust and needs to be cleaned by itself. The irregular sleeve 42 is integrally set on the inner wall of the front cover 41 and is located around the round hole for contacting the air outlet port of the filter element assembly 2.

[0023] The airflow cleaning component 51 includes a fixed frame disposed inside the irregular sleeve 42. A conical sleeve 511 is rotatably connected to the center of the fixed frame via a bearing. Multiple spray elements 512 are disposed on the conical sleeve 511 along the circumferential direction. The number of spray elements 512 is three to six, and three are used in this embodiment. The spraying component 512 includes an L-shaped tube 5121 disposed on the outer shell wall of the conical sleeve 511. A sleeve 5122 and an outer sleeve 5123 are sleeved on the L-shaped tube 5121. A second wedge 5127 is integrally disposed on the outer shell wall of the sleeve 5122. A first wedge 5126 is slidably connected to the inclined surface of the second wedge 5127. The first wedge 5126 and the outer sleeve 5123 are connected by a support rod. The inclined surface of wedge block 1 5126 is provided with a T-shaped groove, and the inclined surface of wedge block 2 5127 is integrally provided with a T-shaped slide bar, and the T-shaped slide bar and the T-shaped groove are slidably connected. A fixing ring 5124 is fixedly connected to the rear of the outer sleeve 5123 and located on the outer shell wall of the L-shaped tube 5121. Multiple slots are opened on the fixing ring 5124 along the circumferential direction. A guide rod 5125 is movably connected in each slot. The front ends of the multiple fixing rings 5124 are fixedly connected to the corresponding outer sleeve 5123. A return spring located on the guide rod 5125 is sleeved between the outer sleeve 5123 and the fixing ring 5124. Multiple injection holes are linearly opened on the outer sleeve 5123, while multiple air outlets are linearly opened on the L-shaped tube 5121 inside the outer sleeve 5123. Under normal conditions, the injection holes on the outer sleeve 5123 and the air outlets on the L-shaped tube 5121 are misaligned, so that external gas cannot enter the L-shaped tube 5121. When the airflow cleaning component 51 rotates, under the action of centrifugal force, the sleeve 5122 drives the second wedge 5127 to move. The second wedge 5127 is slidably connected to the first wedge 5126, causing the outer sleeve 5123 to shift, so that the injection holes and air outlets correspond one-to-one, allowing the internal gas to be injected into the interior of the filter element component 2, realizing the reverse airflow cleaning treatment.

[0024] The miniature air pump body 53 includes a dual-shaft motor 521 mounted on the outer wall of the front end cover 41. Both output ends of the dual-shaft motor 521 are equipped with rotating shafts. The top end of the upper rotating shaft extends into the interior of the air outlet pipe and is equipped with a driving bevel gear 522. The rear side of the driving bevel gear 522 is provided with a driven bevel gear 523 located on the conical sleeve 511. The driven bevel gear 523 meshes with the driving bevel gear 522 for transmission. When the dual-axis motor 521 is running, it drives the active bevel gear 522 to rotate through the upper rotating shaft. The active bevel gear 522 meshes with the driven bevel gear 523, thereby driving the airflow cleaning component 51 to rotate synchronously.

[0025] A second driving bevel gear 524 is installed at the bottom of the lower rotating shaft. A second driven bevel gear 525 meshes with the rear side of the second driving bevel gear 524. A drive shaft is installed at the rear side of the second driven bevel gear 525. The rear end of the drive shaft passes through the front end cover 41 and is equipped with a drive gear 526. The drive gear 526 meshes with the external gear ring 17 for transmission. When the dual-axis motor 521 is running, it drives the second active bevel gear 524 to move through the lower rotating shaft. The second active bevel gear 524 meshes with the second driven bevel gear 525, which in turn drives the drive gear 526 to rotate through the transmission shaft. The drive gear 526 meshes with the external gear ring 17, thereby driving the brush cleaning component to run.

[0026] The miniature air pump body 53 is disposed on the front outer wall of the front cover 41. The miniature air pump body 53 and the conical sleeve 511 are connected by a pipe. The pipe includes a bend, an air guide pipe and a rotary connector. The bend and the conical sleeve 511 are connected by the rotary connector. The top of the bend extends to the outside of the air outlet pipe. The miniature air pump body 53 and the bend are connected by the air guide pipe. The operation of the miniature air pump body 53 is intermittent, which in turn causes the cleaning airflow to be sprayed intermittently, ensuring the dust removal effect.

[0027] The working principle of this invention is as follows: During use, the external air outlet pipe is connected to the car engine, allowing the gas filtered by the product to enter the engine. At this time, the main body of the gas dust detector and the main body of the air volume sensor installed on the pipe detect the passing gas. If the dust content of the gas is higher than a predetermined value and the air volume is lower than a predetermined value, the main body of the gas dust detector and the main body of the air volume sensor will send a corresponding signal to the car control terminal. After receiving the signal, the program in the car control terminal makes a judgment and then performs self-cleaning treatment on the product when the car stops driving. When the product is self-cleaning, the car control terminal will first close the control valves at the air inlet and air outlet, then open multiple solenoid valves located at the rear end 3, and then start the dual-axis motor 521 and micro air pump body 53 of the drive component 52 in the self-cleaning mechanism 5. The micro air pump body 53 operates intermittently, so that the gas injection is in an intermittent state. When the dual-axis motor 521 is running, it synchronously drives the two rotating shafts to rotate. The upper rotating shaft causes the active bevel gear 522 to move. The active bevel gear 522 and the driven bevel gear 523 mesh and drive each other, thereby causing the airflow cleaning assembly 51 to rotate, thereby thoroughly cleaning the inside of the filter element assembly 2. The lower rotating shaft causes the second driving bevel gear 524 to rotate, and the second driving bevel gear 524 meshes with the second driven bevel gear 525, causing the transmission shaft to rotate, thereby driving the drive gear 526 to move. The drive gear 526 meshes with the external gear ring 17, causing the external gear ring 17 to move in a circle with the ring 16. The external gear ring 17 meshes with the several transmission gears 15 on the front side, causing each reciprocating screw 14 to move synchronously. When the reciprocating screw 14 rotates, it not only drives the transmission gear 15 at the rear end to rotate, but also causes the moving block to move, which in turn drives each arc-shaped brush plate 19 to move, thereby brushing and cleaning the outer surface of the filter element assembly 2. The rear transmission gears 15 mesh with the transmission gear ring 34 in the rear end 3, thereby causing the carrying ring 33 to rotate. When the carrying ring 33 rotates, the cleaning brushes 35 on it rotate accordingly, thereby cleaning the inner wall of the rear end cover 31. When the conical sleeve 511 in the airflow cleaning assembly 51 rotates continuously, the various spray elements 512 located on it also rotate. At this time, under the action of the rotational centrifugal force, the sleeve 5122 located on the L-shaped tube 5121 in the spray element 512 slides, causing the second wedge block 5127 on it to move synchronously. When the second wedge block 5127 is displaced, the first wedge block 5126 slidably connected to it moves accordingly, thereby causing the outer sleeve 5123 to move. When the outer sleeve 5123 moves, the various guide rods 5125 on it move, compressing the corresponding return springs. After the outer casing 5123 is adjusted, its various injection holes correspond to the air outlets on the L-shaped tube 5121. At this time, the gas generated by the micro air pump body 53 is transported to each L-shaped tube 5121 under the action of the pipeline, and then sprayed into the interior of the filter element assembly 2. The sprayed gas promotes the filter element assembly 2 in the reverse direction, so that the dust attached to the filter element assembly 2 is discharged from each solenoid valve along with the gas, thereby achieving the cleaning treatment of the filter element assembly 2 in the product.

[0028] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-cleaning air filter, characterized in that: Includes a main shell (1), inside which a filter element assembly (2) for filtering gas is placed, and a rear end (3) and a front end (4) are respectively installed at both ends of the main shell (1), wherein a self-cleaning mechanism (5) for reverse cleaning of the filter element assembly (2) is provided in the front end (4). The main shell (1) includes a shell (11), a brush cleaning assembly, and an inner ring (18). The brush cleaning assembly is located inside the shell (11). There are two inner rings (18), which are movably connected to the two ends of the outer ring of the shell (11). The brush cleaning assembly includes a constraint plate (12) and a positioning ring (13) located on the inner wall of the shell (11). There are multiple constraint plates (12), which are arranged on the inner wall of the shell (11) along the circumferential direction. The positioning ring (13) is located at the front end of the multiple constraint plates (12) and is fixedly connected to the constraint plates (12). Each of the constraint plates (12) is provided with a reciprocating screw (14). The two ends of the reciprocating screw (14) pass through the corresponding shell wall of the constraint plate (12) and are equipped with transmission gears (15). The front end of the reciprocating screw (14) also passes through a positioning ring (13). A circular ring (16) is rotatably connected to the front side of the positioning ring (13). An external toothed ring (17) is provided on the outer ring of the circular ring (16). The external toothed ring (17) meshes with the corresponding transmission gear (15). An arc-shaped brush plate (19) for cleaning the filter element assembly (2) is installed together among the multiple constraint plates (12). The self-cleaning mechanism (5) includes an airflow cleaning component (51), a drive component (52), a micro air pump body (53), and a housing (54). The airflow cleaning component (51) is rotatably connected to the inside of the front end (4), and the drive component (52) is located outside the front end (4) to drive the airflow cleaning component (51) and the external gear ring (17) to rotate. The micro air pump body (53) and the housing (54) are also located outside the front end (4). The housing (54) is used to cover the drive component (52), and the micro air pump body (53) is connected to the airflow cleaning component (51) through a pipe to provide cleaning gas.

2. The self-cleaning air filter according to claim 1, characterized in that, An air inlet pipe for gas entry is provided on the top shell wall of the housing (11). The air inlet pipe is bolted to an external air inlet pipe, and an air inlet control valve is provided on the external pipe. Two support frames are symmetrically arranged at the bottom of the outer ring of the main shell (1). Threads are provided on the outer ring shell walls at both ends of the housing (11). The two inner threaded rings (18) are threaded to the two ends of the housing (11). Each of the constraint plates (12) has a rectangular groove inside, a reciprocating screw (14) is located in the rectangular groove, and a moving block is threaded on the reciprocating screw (14). The moving block is slidably connected to the corresponding rectangular groove. The arc-shaped brush plate (19) includes multiple ones, which are arranged in the circumferential direction inside the housing (11) and connected to the corresponding moving block.

3. A self-cleaning air filter according to claim 1, characterized in that, The rear end portion (3) includes a rear end cover (31), a push ring (32), a carrying ring (33), a transmission gear ring (34), and a cleaning brush (35). The rear end cover (31) is fitted onto the rear end shell wall of the housing (11) and is threadedly connected to the corresponding inner threaded ring (18). The push ring (32) is located in front of the rear end cover (31) and is used to push the filter element assembly (2) placed in the main housing (1). Multiple support pillars are arranged along the circumferential direction on the rear shell wall of the push ring (32). The rear end is integrally set on the inner wall of the rear end cover (31). An annular groove is opened on the outer shell wall of the push ring (32). The carrying ring (33) is rotatably connected in the annular groove. The transmission gear ring (34) and the cleaning brush (35) are both set on the outer shell wall of the carrying ring (33). The cleaning brush (35) includes multiple brushes distributed along the circumferential direction. The cleaning brush (35) is used to clean the inner shell wall of the rear end cover (31). The transmission gear ring (34) meshes with the corresponding transmission gear (15). The rear end cover (31) has multiple dust discharge holes along the circumferential direction on its peripheral wall, and each dust discharge hole is equipped with a solenoid valve.

4. A self-cleaning air filter according to claim 1, characterized in that, The front end (4) includes a front end cover (41) and a special-shaped sleeve (42). The front end cover (41) is sleeved on the front end shell wall of the shell (11) and is threadedly connected to the corresponding inner ring (18). A circular hole is opened at the center of the front end cover (41). An exhaust pipe for gas discharge is installed in the circular hole. The front end of the exhaust pipe is bolted to an external exhaust pipe. An exhaust control valve is configured on the external exhaust pipe. The irregular sleeve (42) is integrally disposed on the inner wall of the front cover (41) and located around the circular hole for contacting the air outlet of the filter element assembly (2).

5. A self-cleaning air filter according to claim 4, characterized in that, The airflow cleaning assembly (51) includes a fixed frame disposed inside the irregular sleeve (42), and a conical sleeve (511) is rotatably connected to the center of the fixed frame via a bearing. Multiple spray elements (512) are disposed on the conical sleeve (511) along the circumferential direction. The spraying component (512) includes an L-shaped tube (5121) disposed on the outer shell wall of the conical sleeve (511), and a sleeve (5122) and an outer sleeve (5123) are fitted onto the L-shaped tube (5121). A second wedge (5127) is integrally provided on the outer shell wall of the sleeve (5122). A first wedge (5126) is slidably connected to the inclined surface of the second wedge (5127). The first wedge (5126) is connected to the outer sleeve (5123) by a support rod. A fixing ring (5124) located on the outer shell wall of the L-shaped tube (5121) is fixedly connected to the rear of the outer sleeve (5123). Multiple slots are opened on the fixing ring (5124) along the circumferential direction. A guide rod (5125) is movably connected in each slot. The front ends of the multiple fixing rings (5124) are fixedly connected to the corresponding outer sleeve (5123). A return spring located on the guide rod (5125) is sleeved between the outer sleeve (5123) and the fixing ring (5124).

6. A self-cleaning air filter according to claim 5, characterized in that, The main body (53) of the micro air pump includes a dual-axis motor (521) mounted on the outer wall of the front end cover (41). Both output ends of the dual-axis motor (521) are equipped with rotating shafts. The top end of the rotating shaft extends into the interior of the air outlet pipe and is equipped with a first active bevel gear (522). The rear side of the first active bevel gear (522) is provided with a first driven bevel gear (523) located on the conical sleeve (511). The first driven bevel gear (523) meshes with the first active bevel gear (522).

7. A self-cleaning air filter according to claim 6, characterized in that, The bottom end of the shaft described below is equipped with a second active bevel gear (524), and a second driven bevel gear (525) meshes with the rear side of the second active bevel gear (524). A drive shaft is installed on the rear side of the second driven bevel gear (525), and the rear end of the drive shaft passes through the front end cover (41) and is equipped with a drive gear (526). The drive gear (526) meshes with the external gear ring (17) for transmission.

8. A self-cleaning air filter according to claim 5, characterized in that, The micro air pump body (53) is disposed on the front outer wall of the front end cover (41). The micro air pump body (53) and the conical sleeve (511) are connected by a pipe. The pipe includes a bend, an air guide pipe and a rotating connector. The bend and the conical sleeve (511) are connected by the rotating connector. The top of the bend extends to the outside of the air outlet pipe. The micro air pump body (53) and the bend are connected by the air guide pipe.

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