An air filter system with self-cleaning function

Abstract

The present invention relates to an air filter system with a self-cleaning function, comprising an air filter (1), wherein the air filter (1) comprises a housing (4), a safety filter element (5), a main filter element (6) and a cover (7), and further comprises a self-cleaning device (2) and a self-dust exhaust device (3), wherein the self-cleaning device (2) comprises a first air source (9), a first air valve (10), a first air pipe (11) and an air intake pipe (8) connected in sequence, wherein the air intake pipe (8) is mounted on the cover (7); the self-dust exhaust device (3) comprises a second air source (12), a second air valve (13), a second air pipe (14), a venturi dust exhaust pipe (15) and a dust exhaust bag (16) connected in sequence, wherein the venturi dust exhaust pipe (15) is connected to the housing (4) via a connecting pipe (17). Compared with the prior art, the present invention has the advantages of long service life, adaptability to high particulate matter pollution environment, protection of human body, protection of engine, etc.

Description

Technical Field

[0001] The invention relates to an air filter system, in particular to an air filter system with a self-cleaning function. Background Art

[0002] The working process of modern engines is to convert the heat energy released by the combustion of fuels such as diesel into mechanical energy, which requires a large amount of air. In order to ensure that the engine can burn normally and prevent particulate pollutants in the air from affecting the life of engine parts, air filters have become an important component of modern cars and engines.

[0003] The air filter intercepts particles in the air through the filter element. When the number of intercepted particles reaches a certain level, the air intake resistance of the air filter will increase significantly, which will lead to insufficient engine air intake and incomplete combustion. Therefore, in order to ensure the normal operation of the engine, the filter element needs to be maintained regularly throughout the entire service life. Currently, common products on the market rely on manual removal of the filter element for maintenance, which not only affects efficiency, but also seriously affects the health of the operator due to the dust raised during the cleaning process. When in a heavy load and high dust working environment, the maintenance frequency increases, and this problem is particularly significant. Summary of the invention

[0004] The purpose of the present invention is to provide an air filter system solution with a self-cleaning function in order to overcome the defects of the above-mentioned prior art, which can realize automatic back-blowing of filter element particles and automatic dust removal through a mechanical structure, avoiding manual operation and its derivative problems. Air filters under heavy-load working environments generally need to be equipped with a safety filter element to protect the engine during maintenance. The present invention can achieve self-cleaning while retaining the safety filter element.

[0005] The purpose of the present invention can be achieved through the following technical solutions: an air filter system with a self-cleaning function, comprising an air filter, the air filter comprising a housing, a safety filter element, a main filter element and a cover, characterized in that it also comprises a self-cleaning device and a self-dust removal device, the self-cleaning device comprising a first air source, a first air valve, a first air pipe and an air intake pipe connected in sequence, the air intake pipe being installed on the cover; the self-dust removal device comprising a second air source, a second air valve, a second air pipe, a venturi dust removal pipe and a dust removal bag connected in sequence, the venturi dust removal pipe being connected to the dust removal port of the cover through a connecting pipe. The first air valve and the second air valve are used to control the external first air source and the second air source respectively, thereby realizing automatic backblowing and automatic dust removal, without the need to disassemble the cover and the main filter element, and without contacting dust particles.

[0006] Furthermore, the top cover of the main filter element is made of elastic material and has a reserved assembly hole, which automatically forms a matching seal with the cover, and the air intake pipe on the cover is inserted into the reserved assembly hole of the main filter element top cover, which simplifies the matching structure and reduces the number of parts and seals.

[0007] Furthermore, the safety filter element is conical in shape and has a guide cover on the top. The guide cover is a bullet-shaped structure with a spherical or conical top and a conical side. The backwash gas introduced from the self-cleaning device is evenly dispersed in all directions. The dispersed airflow blows up the external particles of the main filter element from the inside to the outside and then settles them, thereby realizing the function of backwashing the side wall of the main filter element.

[0008] Furthermore, the air intake pipe is assembled on the cover, and a quick-connect connector is provided on the air intake pipe to connect with the first air pipe, thereby ensuring the airtightness of the air pipe and facilitating the connection.

[0009] Furthermore, the second air source generates a continuous or intermittent airflow through the second air valve, which enters the Venturi dust exhaust pipe to form a gas flow. The air flow in the Venturi dust exhaust pipe generates a negative pressure in the connecting pipe, extracts the dust particles settled on the inner wall of the shell, and discharges them through the dust bag. The Venturi dust exhaust pipe and the dust bag are used together to meet different working conditions; when the air filter is working, the dust bag opening is closed due to the negative pressure in the air filter cavity to prevent pressure loss; when the self-dust exhaust function is started, the dust exhaust port is opened by the positive pressure airflow in the Venturi dust exhaust pipe, and dust is discharged normally.

[0010] Furthermore, the safety filter element is located at the center of the shell, and its top air guide cover faces the air intake pipe opening.

[0011] Furthermore, the main filter element is located outside the safety filter element and is assembled with the cover or outer shell through the cover bodies at both ends.

[0012] Furthermore, the shell and the cover are fixed by buckles.

[0013] Furthermore, the first air source and the second air source are static air sources or dynamic air sources, the static air source includes a compressed air tank, and the dynamic air source includes a fan or a compressed air circuit.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) Long service life: The automatic backflush structure can ensure that the filter element is backflushed with stable air pressure, reducing the chance of damage to the filter element and extending the service life of the filter element.

[0016] (2) Adapt to high particulate matter pollution environment: When the concentration of environmental particulate matter is high, the air filter maintenance cycle will be shortened and the frequency will increase, which will seriously affect the work efficiency. The present invention can replace manual maintenance, saving time and completing the maintenance work efficiently.

[0017] (3) Protecting the human body: The present invention can prevent the user from direct contact with dust particles, thus ensuring human health.

[0018] (4) Protecting the life of the engine: The present invention retains a safety filter element, which can effectively protect the engine when the main filter element is removed and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an air filter system with a self-cleaning function according to the present invention;

[0020] Figure 2 Schematic diagram of the internal structure of the self-cleaning air filter of the present invention;

[0021] Figure 3 This is a schematic diagram of the self-cleaning function principle of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the safety filter element of the present invention.

[0023] The numbers in the figure show:

[0024] 1. Air filter, 2. Self-cleaning device, 3. Self-dust exhaust device, 4. Housing, 5. Safety filter element, 6. Main filter element, 7. Cover, 8. Air pipe interface, 9. First air source, 10. First air valve, 11. First air pipe, 12. Second air source, 13. Second air valve, 14. Second air pipe, 15. Venturi dust exhaust pipe, 16. Dust bag, 17. Connecting pipe, 18. Conical air guide cover. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example

[0027] like Figure 1 As shown, an air filter system with a self-cleaning function includes three parts: an air filter 1, a self-cleaning device 2, and a self-dust removal device 3.

[0028] Wherein, the air filter 1, as Figure 2As shown, it includes a housing 4, a safety filter element 5, a main filter element 6 and a cover 7. The safety filter element 5 is located at the center of the housing 4, and the main filter element 6 is located at the periphery of the safety filter element 5. It is assembled with the cover 7 or the housing 4 through the covers at both ends. The housing 4 and the cover 7 are fixed by snaps. A guide cover 18 is provided on the top of the safety filter element 5. The guide cover 18 is a bullet-shaped structure with a spherical top and a conical side. The back-blowing gas introduced from the self-cleaning device 2 is evenly dispersed in all directions. The dispersed airflow blows up the external particles of the main filter element 6 from the inside to the outside and then settles them, realizing the function of back-blowing the side wall of the main filter element 6. The top cover of the main filter element 6 is made of elastic material and has a reserved assembly hole, which automatically forms a matching seal with the cover 7.

[0029] like Figure 1 As shown, the self-cleaning device 2 comprises a first air source 9, a first air valve 10, a first air pipe 11 and an air inlet pipe 8 connected in sequence, and the air inlet pipe 8 is installed on the cover 7; the self-dust exhaust device 3 comprises a second air source 12, a second air valve 13, a second air pipe 14, a venturi dust exhaust pipe 15 and a dust bag 16 connected in sequence, and the venturi dust exhaust pipe 15 is connected to the dust exhaust port of the cover 7 through a connecting pipe 17. The air inlet pipe 8 is assembled on the cover 7, and a quick-connect connector is provided on the air inlet pipe 8, which is connected to the first air pipe 11. During assembly, the air inlet pipe 8 is inserted into the reserved assembly hole on the upper cover of the main filter element 6, and the top air guide cover 18 of the safety filter element 5 is directly opposite to the air inlet pipe 8.

[0030] The second air source 12 generates a continuous or intermittent airflow through the second air valve 13, which enters the venturi dust exhaust pipe 15 to form a gas flow. The air flow in the venturi dust exhaust pipe 15 generates a negative pressure in the connecting pipe 17, extracting the dust particles settled on the inner wall of the housing 4 and discharging them through the dust bag 16. Figure 3 As shown, the black arrows represent the direction of gas flow and the white arrows represent the direction of particle movement.

[0031] The first air source 9 and the second air source 12 are static air sources or dynamic air sources. The static air source includes a compressed air tank, and the dynamic air source includes a fan or a compressed air circuit.

[0032] When the engine stops working, the above device can perform automatic back-blowing and automatic dust removal. The specific operations are as follows:

[0033] When the self-cleaning device is working, the first air valve 10 is opened, and the compressed gas in the first air source 9 enters the inner cavity of the main filter element 6 after connecting the first air pipe 11 and the cover 7 in sequence. The gas is dispersed in all directions through the guide cover on the top of the safety filter element 5. The dispersed airflow blows up the external particles of the main filter element from the inside to the outside and then settles. The bullet-shaped structure guide cover on the top of the safety filter element 5 is used to evenly guide the gas to the inner side of the filter material of the main filter element 6. The spherical structure on the top of the guide cover can buffer and decelerate the gas and guide part of it to the rear side wall of the main filter element 6; the conical structure at the bottom of the guide cover guides the gas to the front and middle of the main filter element, so that the entire filter element is evenly covered by the airflow. The preset air intake pipe 8 on the cover 7 is directly inserted into the mounting hole of the plastic material upper cover of the main filter element 6, which not only ensures the sealing effect, but also reduces the number of parts. The invention uses a quick-connect connector at one end of the air intake pipe 8, which can be directly connected to the first air pipe 11 to ensure the reliability of the compressed gas sealing.

[0034] When the dust removal device is working, the second air valve 13 is opened, and the second air source 12 generates a continuous or intermittent airflow, and the gas enters the Venturi dust exhaust pipe 15 through the second air pipe 14 to form a gas flow; the air flow in the Venturi dust exhaust pipe 15 generates a certain negative pressure in the connecting pipe 17, and the negative pressure extracts the dust particles in the air filter, and the extracted dust particles are finally discharged through the dust bag 16 along with the airflow. Using the Venturi tube principle, when the gas provided by the second air source 12 flows in the Venturi dust exhaust pipe 15, the flow rate changes due to the change in the flow cross-sectional area, thereby generating a negative pressure, which sucks out the dust particles deposited in the air filter and the suspended particles, and then discharges them from the air filter. The invention uses the negative pressure sealing function of the dust bag 16 to ensure that when the engine is working normally, the dust exhaust pipe will not be connected to the atmosphere and affect the air pressure balance; when dust removal is required, the positive pressure generated by the airflow pushes the dust bag port open to discharge dust.

Claims

1. An air filter system with a self-cleaning function, comprising an air filter (1), wherein the air filter (1) comprises a housing (4), a safety filter element (5), a main filter element (6) and a cover (7), characterized in that: It also comprises a self-cleaning device (2) and a self-dust exhaust device (3), wherein the self-cleaning device (2) comprises a first air source (9), a first air valve (10), a first air pipe (11) and an air intake pipe (8) which are connected in sequence, and the air intake pipe (8) is mounted on the cover (7); the self-dust exhaust device (3) comprises a second air source (12), a second air valve (13), a second air pipe (14), a Venturi dust exhaust pipe (15) and a dust exhaust bag (16) which are connected in sequence, and the Venturi dust exhaust pipe (15) is connected to the dust exhaust port of the cover (7) via a connecting pipe (17); The safety filter element (5) is conical in shape, and a guide cover (18) is provided on the top. The guide cover (18) is a bullet-shaped structure, and its top is spherical or conical, and its side is conical. The backwash gas introduced from the self-cleaning device (2) is evenly dispersed in all directions. The dispersed airflow blows up the external particles of the main filter element (6) from the inside to the outside and then settles them, thereby realizing the function of backwashing the side wall of the main filter element (6); The second air source (12) generates a continuous or intermittent airflow through the second air valve (13), which enters the Venturi dust exhaust pipe (15) to form a gas flow. The air flow in the Venturi dust exhaust pipe (15) generates a negative pressure in the connecting pipe (17), thereby extracting dust particles settled on the inner wall of the housing (4) and discharging them through the dust exhaust bag (16); The safety filter element (5) is located at the center of the housing (4), and its top air guide cover (18) faces the air inlet pipe (8) opening.

2. The air filter system with self-cleaning function according to claim 1, characterized in that: The top cover of the main filter element (6) is made of elastic material and has a reserved assembly hole, which automatically forms a matching seal with the cover (7), and the air inlet pipe (8) on the cover (7) is inserted into the reserved assembly hole of the top cover of the main filter element (6).

3. The air filter system with self-cleaning function according to claim 1, characterized in that: The air intake pipe (8) is assembled on the cover (7), and a quick-connect connector is provided on the air intake pipe (8) and connected to the first air pipe (11).

4. The air filter system with self-cleaning function according to claim 1, characterized in that: The main filter element (6) is located outside the safety filter element (5) and is assembled with the cover (7) or the outer shell (4) through its two end covers.

5. The air filter system with self-cleaning function according to claim 1, characterized in that: The housing (4) and the cover (7) are fixed by means of buckles.

6. The air filter system with self-cleaning function according to claim 1, characterized in that: The first air source (9) and the second air source (12) are static air sources or dynamic air sources. The static air source comprises a compressed air tank, and the dynamic air source comprises a fan or a compressed air circuit.

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