Self-cleaning air filter assembly

Abstract

The invention relates to the field of vehicle engine air inlet systems, and discloses a self-cleaning air filter assembly which comprises a shell assembly, a full-stamping assembly support is arranged at the air outlet end of the shell assembly and connected with a cylinder of the shell assembly in a welded mode, and an air cylinder and a controller are installed at the top end and the side end of the full-stamping assembly support through bolts respectively. The electromagnetic valve is fixed on the full-stamping assembly bracket through a bolt and is connected with the air outlet part of the air storage cylinder and a back-blowing air channel of the shell assembly, two groups of sensor mounting seats are mounted on the same annular section of the air outlet end of the shell assembly and are respectively provided with a back-blowing differential pressure sensor and a maintenance differential pressure sensor, and a screw rod is rotationally mounted in the sensor mounting seats; the pre-filtration porous medium and the fine filtration porous medium are detachably mounted through a screw rod, and the connecting pipeline penetrates through and is connected with gas paths and signal interfaces of all the components and is in sealed connection through threads or clamps. The self-cleaning air filter assembly has the advantages of being high in structural strength, good in stability and good in sealing performance, light-weight design is achieved, the intelligent level is high, and the self-cleaning air filter assembly is economical and practical.

Description

Technical Field

[0001] This invention relates to the field of vehicle engine intake systems, specifically to a self-cleaning air filter assembly. Background Technology

[0002] The air filter assembly primarily relies on the filter element assembly to filter air, and is a key component ensuring clean engine intake air. Currently, existing air filter assemblies have several problems: The filter assembly requires manual maintenance and needs to be replaced after 3-5 backflushing cycles. Manual operation can easily damage the filter media, leading to premature engine wear. Existing backflushing technology is mostly used in two-stage air filters, which only backflushe the pre-filter to extend the filter life, resulting in a relatively high overall cost. The cleaning action of the self-cleaning air filter is only performed in the parking or manual mode, and the control logic does not match the actual operating conditions of the vehicle. At the same time, the air filter assembly bracket mostly adopts a square tube welded structure, which has the problems of large size and weight, and lacks lightweight design.

[0003] Therefore, there is an urgent need to develop a new type of self-cleaning air filter assembly to solve one or more of the above-mentioned defects. Summary of the Invention

[0004] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a self-cleaning air filter assembly. Through multiple component innovations, it specifically solves the problems of existing air filters, such as easy damage to the medium during manual maintenance, high cost of backflushing technology, control logic that does not match actual vehicle use, and excessively large bracket size. At the same time, through multi-faceted structural design and component matching, it achieves the advantages of good overall structural strength, good stability, and good sealing performance. Technical solution

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning air filter assembly, comprising a housing assembly, an air tank, a controller, a solenoid valve, a backflush differential pressure sensor, a maintenance differential pressure sensor, a pre-filter porous medium, a fine filter porous medium, and connecting pipelines; The air outlet end of the housing assembly is provided with a fully stamped assembly bracket, which is connected to the cylindrical body of the housing assembly by welding. The air storage cylinder and the controller are respectively bolted to the top and side of the fully stamped assembly bracket. The solenoid valve is installed between the air outlet of the air reservoir and the backflush air passage of the housing assembly, and is fixedly installed on the fully stamped assembly bracket with bolts. Two sets of sensor mounting bases are installed at the same annular cross section at the air outlet end of the housing assembly. The two sets of sensor mounting bases are used to install the backflush differential pressure sensor and the maintenance differential pressure sensor, respectively. A set of screws is rotatably installed inside the housing assembly. The pre-filter porous media and the fine filter porous media are detachably installed inside the housing assembly through the screws. The connecting pipeline runs through the gas cylinder, solenoid valve, housing assembly, and signal interface, and is sealed with threads or clamps.

[0006] Preferably, the outer end cover of the housing assembly is provided with an air inlet, and an airflow guide ring and a porous medium positioning ring are installed inside; the upper end of the cylindrical body of the housing assembly is provided with an air inlet, and the lower end is provided with a dust discharge port.

[0007] Preferably, the pre-filtration porous media material is a filter material with good burst resistance, and the fine filtration porous media is a filter material with good burst resistance and high filtration accuracy. Nano filter material is recommended.

[0008] Preferably, the air storage cylinder has an air inlet installed on its side, a water outlet installed at its lower end, and an air outlet installed on the side of its lower end away from the water outlet. An L-shaped bracket is also installed below it. The air inlet, water outlet, air outlet, and L-shaped bracket are all connected to the air storage cylinder by welding.

[0009] Preferably, the lower end of the L-shaped bracket is designed with a mounting hole, through which the air storage cylinder is installed on the fully stamped assembly bracket of the air filter housing assembly.

[0010] Preferably, the controller is linearly connected to two input signals: the differential pressure sensor signal input and the vehicle key signal input. The controller is also linearly connected to the solenoid valve's working output signal. The differential pressure sensor signal input is also linearly connected to the backflush differential pressure sensor and the wiring terminals on the sensor mounting base; the vehicle key signal input is also linearly connected to the vehicle power control system; the solenoid valve working output signal is also linearly connected to the solenoid valve's own coil wiring terminals, and at the same time, it is connected to the air outlet of the air tank and the backflush air passage of the housing assembly through the connecting pipe.

[0011] Preferably, the controller also has a manual button, which is linearly connected to the controller.

[0012] Preferably, an air intake protection component is rotatably mounted at the end of the air intake.

[0013] Preferably, the maintenance differential pressure sensor is used to detect the filtration resistance of the air filter assembly and is linearly connected to the vehicle control console.

[0014] Compared with the prior art, the present invention provides a self-cleaning air filter assembly, which has the following beneficial effects: 1. This invention solves the problem of excessively large bracket size by replacing the traditional square tube welded bracket with a fully stamped assembly bracket. It also features a pre-filter and fine filter porous media design with a detachable screw mounting structure, preventing damage to the filter media during manual maintenance. Furthermore, by optimizing the linkage structure between the backflushing system and the controller, and combining the synchronous control logic of the backflushing differential pressure sensor and vehicle key signal, it meets actual vehicle usage needs and reduces the cost of backflushing technology. Additionally, the dual-sensor same-section mounting design improves detection accuracy. These component innovations meet the structural requirements of the self-cleaning air filter assembly, filling a gap in the industry for lightweight and intelligent self-cleaning air filters, and effectively enhancing the product's competitiveness.

[0015] 2. This invention employs a fully stamped assembly bracket welded to the cylindrical housing assembly, replacing the traditional square tube welded bracket. This significantly reduces volume while improving structural strength, achieving a lightweight design and facilitating vehicle installation and adaptation. Furthermore, the controller is linearly connected to the backflush differential pressure sensor, maintenance differential pressure sensor, solenoid valve, and vehicle power control system. Combined with a reserved manual button design, this enhances the product's intelligence, enabling automatic and manual dual-mode self-cleaning without frequent manual disassembly and maintenance. Simultaneously, the invention rationally selects pre-filter porous media with high burst resistance and fine filter porous media with high filtration accuracy, coupled with a highly efficient backflush structure. This ensures filtration effectiveness, avoids the risk of premature engine wear, and reduces backflush maintenance costs. Overall, it balances practicality and economy, effectively reducing usage and maintenance costs, achieving an economical and practical effect. Attached Figure Description

[0016] Figure 1 This is a front view of the external structure of the present invention; Figure 2 This is a side view of the external structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the external structure of the present invention; Figure 4 This is a front view schematic diagram of the housing assembly of the present invention; Figure 5 This is a side view of the housing assembly of the present invention; Figure 6 This is a schematic diagram of the internal structure of the housing assembly of the present invention; Figure 7 This is a front view schematic diagram of the gas storage cylinder of the present invention; Figure 8 This is a side view of the gas storage tank of the present invention; Figure 9 The controller of this invention is viewed from the front; Figure 10 This is a side view of the controller of the present invention; Figure 11This is a schematic diagram of the control logic of the present invention.

[0017] The components include: 1. Housing assembly; 2. Air tank; 3. Controller; 4. Solenoid valve; 5. Backflush differential pressure sensor; 6. Maintenance differential pressure sensor; 7. Pre-filtered porous media; 8. Fine-filtered porous media; 9. Connecting pipes; 11. Fully stamped assembly bracket; 12. Air inlet; 13. Airflow guide ring; 14. Porous media positioning ring; 15. Screw; 16. Sensor mounting base; 17. Air inlet; 18. Ash discharge port; 21. Air filling port; 22. Water discharge port; 23. Air outlet; 24. L-shaped bracket; 241. Mounting hole; 31. Differential pressure sensor signal input; 32. Vehicle key signal input; 33. Solenoid valve working output signal; 34. Manual button. Detailed Implementation

[0018] 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. It is worth noting that this application also relates to prior art. Since prior art is well known to those skilled in the art, it will not be described in detail in this application.

[0019] Please see Figures 1-11A self-cleaning air filter assembly includes a housing assembly 1, an air tank 2, a controller 3, a solenoid valve 4, a backflush differential pressure sensor 5, a maintenance differential pressure sensor 6, a pre-filter porous medium 7, a fine filter porous medium 8, and connecting pipes 9. The housing assembly 1 has a fully stamped assembly bracket 11 at its outlet end, which is welded to the cylindrical body of the housing assembly 1. The outer end cover of the housing assembly 1 has an air inlet 12, inside which an airflow guide ring 13 and a porous medium positioning ring 14 are installed. The upper end of the cylindrical body has an air inlet 17, with an air inlet protection component rotatably mounted at the end of the air inlet 17, and a ash discharge port 18 at the lower end. An air inlet 21 and a water outlet 22 are welded to the lower end of the cylinder 2, and an air outlet 23 is welded to the other side. An L-shaped bracket 24 is also welded to the bottom, with a mounting hole 241 at the lower end of the L-shaped bracket 24. The air cylinder 2 is bolted to the top of the fully stamped assembly bracket 11 through the mounting hole 241. The controller 3 is bolted to the side of the fully stamped assembly bracket 11. The solenoid valve 4 is installed between the air outlet of the air cylinder 2 and the backflush air passage of the housing assembly 1, and is fixed to the fully stamped assembly bracket 11 with bolts. Two sets of sensor mounting seats 16 are installed at the same annular cross-section at the air outlet of the housing assembly 1, which are used to install the backflush differential pressure sensor 5 and the maintenance sensor 5, respectively. Differential pressure sensor 6 is used to detect the filtration resistance of the air filter assembly and is linearly connected to the vehicle control panel. A set of screws 15 is rotatably mounted inside the housing assembly 1. Pre-filter porous media 7 and fine filter porous media 8 are detachably installed inside the housing assembly 1 via the screws 15. Pre-filter porous media 7 uses a burst-resistant filter material, while fine filter porous media 8 uses a burst-resistant filter material with high filtration accuracy; nano-filter material is recommended. Connecting pipe 9 runs through and connects the air reservoir 2, solenoid valve 4, the air path of the housing assembly 1, and the signal interface, using threaded or clamp-sealed connections. The controller 3 is connected to the differential pressure sensor. The signal input 31 and vehicle key signal input 32 are linearly connected, and are also linearly connected to the solenoid valve working output signal 33. The differential pressure sensor signal input 31 is linearly connected to the wiring terminals on the backflush differential pressure sensor 5 and the sensor mounting base 16. At the same time, the solenoid valve is connected to the air outlet of the housing assembly 1 through the connecting pipe 9. The vehicle key signal input 32 is linearly connected to the vehicle power control system. The solenoid valve working output signal 33 is linearly connected to the wiring terminals of the solenoid valve 4's own coil. It is also connected to the air outlet of the air tank 2 and the backflush air passage of the housing assembly 1 through the connecting pipe 9. The controller 3 also has a manual button 34 that is linearly connected to itself.

[0020] When the self-cleaning air filter assembly proposed in this application is in operation, it first relies on the structural design of the welded connection between the fully stamped assembly bracket 11 and the cylindrical body of the housing assembly 1, and the threaded sealing connection pipe 9 to ensure the advantages of good overall structural strength, good stability and good sealing performance, while achieving the characteristics of lightweight, high level of intelligence and economic practicality. During operation, outside air enters through the air inlet 17 of the outer end cover of the housing assembly 1, and undergoes staged filtration through the pre-filter porous media 7 and the fine filter porous media 8. The filtered clean air is discharged from the air outlet of the housing assembly 1, providing clean intake air for the engine. During this process, the backflush differential pressure sensor 5 and the maintenance differential pressure sensor 6, mounted on two sets of sensor mounting seats 16 at the same annular cross-section of the air outlet of the housing assembly 1, work synchronously to ensure the consistency of sensor values. The maintenance differential pressure sensor 6 detects the filtration resistance of the air filter assembly in real time and is linearly connected to the vehicle control panel. When the air filter assembly reaches the maintenance conditions required by the customer, it transmits a signal to the vehicle control panel to remind the customer to clean the pre-filter porous media 7 and the fine filter porous media 8. When the backflush differential pressure sensor 5 and the vehicle key power-off signal are simultaneously input, the controller 3 outputs a working signal to the solenoid valve 4, which starts working and delivers the compressed air in the air tank 2 to the backflush air passage of the housing assembly 1 through the connecting pipe 9 to backflush clean the pre-filtered porous medium 7. The dust after backflush is discharged through the lower dust discharge port 18, realizing the self-cleaning function. The controller 3 also has a reserved manual button 34, which can be manually started to further improve the convenience of use. The whole process does not require frequent manual disassembly and maintenance, avoiding damage to the filter medium caused by manual operation and resulting in premature engine wear. Compared with the traditional two-stage air filter backflush technology, the cost is lower and the control logic is more in line with the actual vehicle use needs.

[0021] 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 self-cleaning air filter assembly, characterized in that: Includes housing assembly (1), air tank (2), controller (3), solenoid valve (4), backflush differential pressure sensor (5), maintenance differential pressure sensor (6), pre-filtered porous media (7), fine filter porous media (8) and connecting pipeline (9); The air outlet end of the housing assembly (1) is provided with a fully stamped assembly bracket (11). The fully stamped assembly bracket (11) and the cylindrical body of the housing assembly (1) are connected by welding. The air storage cylinder (2) and the controller (3) are respectively installed on the top and side ends of the fully stamped assembly bracket (11) by bolts. The solenoid valve (4) is installed between the air outlet of the air storage cylinder (2) and the backflush air passage of the housing assembly (1), and is fixed on the fully stamped assembly bracket (11) by bolts; Two sets of sensor mounting bases (16) are installed at the same annular cross section at the air outlet end of the housing assembly (1). The two sets of sensor mounting bases (16) are used to install the backflush differential pressure sensor (5) and the maintenance differential pressure sensor (6), respectively. A set of screws (15) is rotatably installed inside the housing assembly (1). The pre-filter porous medium (7) and the fine filter porous medium (8) are detachably installed inside the housing assembly (1) through the screws (15). The connecting pipe (9) passes through the gas passage and signal interface of the gas storage cylinder (2), solenoid valve (4), housing assembly (1), and is sealed by threads or clamps.

2. The self-cleaning air filter assembly according to claim 1, characterized in that: The outer end cover of the housing assembly (1) is provided with an air inlet (12), and an airflow guide ring (13) and a porous medium positioning ring (14) are installed inside; the upper end of the cylindrical body of the housing assembly (1) is provided with an air inlet (17), and the lower end is provided with an ash discharge port (18).

3. The self-cleaning air filter assembly according to claim 1, characterized in that: The pre-filter porous media (7) is made of a filter material with good burst resistance, and the fine filter porous media (8) is made of a filter material with good burst resistance and high filtration accuracy. Nano filter material is recommended.

4. The self-cleaning air filter assembly according to claim 1, characterized in that: The gas storage cylinder (2) has an air inlet (21) installed on the side end, a water outlet (22) installed at the bottom end, an air outlet (23) installed on the side of the bottom end away from the water outlet (22), and an L-shaped bracket (24) installed at the bottom. The air inlet (21), water outlet (22), air outlet (23) and L-shaped bracket (24) are all connected to the gas storage cylinder (2) by welding.

5. The self-cleaning air filter assembly according to claim 4, characterized in that: The L-shaped bracket (24) has a mounting hole (241) at its lower end. The air storage cylinder (2) is installed on the fully stamped assembly bracket (11) of the air filter housing assembly (1) through the mounting hole (241).

6. The self-cleaning air filter assembly according to claim 1, characterized in that: The controller (3) is linearly connected to the differential pressure sensor signal input (31) and the vehicle key signal input (32) respectively. The controller (3) is also linearly connected to the solenoid valve working output signal (33). The differential pressure sensor signal input (31) is also linearly connected to the wiring terminals on the backflush differential pressure sensor (5) and the sensor mounting base (16); the vehicle key signal input (32) is also linearly connected to the vehicle power control system; the solenoid valve working output signal (33) is also linearly connected to the wiring terminals of the solenoid valve (4) coil itself, and at the same time, it is connected to the air outlet of the air tank (2) and the backflush air passage of the housing assembly (1) in conjunction with the connecting pipe (9).

7. The self-cleaning air filter assembly according to claim 6, characterized in that: The controller (3) also has a reserved manual button (34), which is linearly connected to the controller (3).

8. The self-cleaning air filter assembly according to claim 2, characterized in that: An air intake protection component can be rotatably installed at the end of the air inlet (17).

9. The self-cleaning air filter assembly according to claim 1, characterized in that: The maintenance differential pressure sensor (6) is used to detect the filtration resistance of the air filter assembly and is linearly connected to the vehicle control console.

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