An air filter

Abstract

This utility model discloses an air filter, belonging to the field of filter technology. It includes a coarse filter housing, an intermediate housing, an outlet housing, a safety filter element, a main filter element, a pressure plate, and a cyclone tube. One end of the coarse filter housing is connected to one end of the intermediate housing via a spring assembly, and the other end of the intermediate housing is connected to the end of the outlet housing. An air outlet is provided on the outlet housing. The safety filter element is positioned between the outlet housing and the main filter element, and the main filter element is positioned between the outlet housing and the pressure plate. A safety filter element sealing surface and a main filter element sealing surface are provided on the inner wall of the outlet housing. The safety filter element and the main filter element are arranged opposite each other. Air enters the cyclone tube from the coarse filter housing and passes sequentially through the outlet tube, the main filter element, and the safety filter element before exiting from the outlet. This utility model integrates the coarse filter and the air filter into one unit and adopts a flat structure design to achieve small space occupation, easy installation, and high filtration efficiency.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to an air filter. Background Technology

[0002] To improve the intake air quality of vehicle engines and extend the service life of air filters, a coarse filter is usually installed separately at the air intake end of the air filter. In existing technology, the pre-filter and air filter are often installed separately and connected by pipelines, which occupies a large space and increases friction loss. Nowadays, internal combustion engine exhaust treatment systems are more complex and larger, so the installation space left for other components in the engine compartment is getting smaller and smaller, and the installation space for air filters and coarse filters is also relatively tight.

[0003] Therefore, those skilled in the art need to provide an air filter that occupies little space, is easy to install and arrange, and has a high filtration effect. Utility Model Content

[0004] The purpose of this utility model is to provide an air filter that integrates the coarse filter and the air filter into one unit, and adopts a flat structure design to achieve the goals of small space occupation, easy installation and layout, and high filtration effect.

[0005] To achieve the above objectives, this utility model provides an air filter, including a coarse filter housing, an intermediate housing, an air outlet housing, a safety filter element, a main filter element, a pressure plate, and a cyclone tube. One end of the coarse filter housing is connected to one end of the intermediate housing via a hanging spring assembly, and the other end of the intermediate housing is connected to the end of the air outlet housing. An air outlet is provided on the air outlet housing.

[0006] The safety filter element is positioned between the air outlet housing and the main filter element, and the main filter element is positioned between the air outlet housing and the pressure plate. The inner wall surface of the air outlet housing is provided with a safety filter element sealing surface and a main filter element sealing surface. The safety filter element and the main filter element are arranged opposite to each other, and the outer surface of the safety filter element is in close contact with the safety filter element sealing surface. The outer surface of one end of the main filter element is in close contact with the main filter element sealing surface.

[0007] The pressure plate is connected inside the coarse filter housing. Multiple air outlet pipes are evenly arranged on one end face of the pressure plate. One end of the multiple cyclone pipes abuts against the end face of the pressure plate, and the air outlet pipe is located inside the cyclone pipe. The other end of the cyclone pipe is limited to the limiting hole of the coarse filter housing. Air enters the cyclone pipe from the coarse filter housing and passes through the air outlet pipe, the main filter element, and the safety filter element in sequence before being output from the air outlet.

[0008] Preferably, a safety filter element limiting plate is provided at the front end of the inner wall of the air outlet housing, one end of the safety filter element abuts against the safety filter element limiting plate, and the other end of the safety filter element abuts against the front end of the main filter element; a main filter element limiting plate is provided on the inner wall of the front end of the pressure plate, one end of the main filter element abuts against the sealing surface of the main filter element, and the other end of the main filter element abuts against the main filter element limiting plate.

[0009] Preferably, the inner wall of the coarse filter housing is provided with multiple screw holes, the end face of the pressure plate is provided with multiple through holes, and multiple screws pass through the pressure plate and are threaded to the screw holes on the coarse filter housing; the end face of the air outlet housing is provided with multiple through holes, and one end face of the intermediate housing is provided with multiple screw holes, and multiple screws pass through the air outlet housing and are threaded to the screw holes on the intermediate housing.

[0010] Preferably, the cyclone tube is cone-shaped, a limiting protrusion is provided at the bottom of one end of the cyclone tube with a smaller diameter, and a ash discharge port is provided at the bottom of one end of the cyclone tube with a larger diameter. A limiting groove is provided on the limiting hole of the coarse filter housing, and the limiting protrusion engages with the limiting groove.

[0011] Preferably, a dust discharge port is provided at the bottom of the coarse filter housing, and a dust discharge valve is threadedly connected to the bottom of the dust discharge port, with all the dust discharge ports facing the dust discharge valve.

[0012] Preferably, the spring mounting assembly includes a spring mounting seat, a hook, and a handle. Multiple spring mounting seats are evenly arranged on the front end of the outer surface of the coarse filter housing. One end of the handle is rotatably connected to the spring mounting seat, and the end of the hook is rotatably connected to the middle of the handle. Multiple spring mounting grooves are evenly arranged on the outer wall of the rear end face of the intermediate housing, and the top end of the hook is engaged in the spring mounting groove.

[0013] Preferably, the air outlet pipe is cone-shaped.

[0014] Preferably, a front sealing ring mounting groove is provided on one end face of the air outlet housing, and the front sealing ring is limited between the front sealing ring mounting groove and the front end face of the intermediate housing; an extension is provided on the front end face of the coarse filter housing, and the coarse filter sealing ring is limited between the extension and the rear end face of the intermediate housing; an inner stepped surface is provided on the front end of the coarse filter housing, and the rear sealing ring is fitted onto the inner stepped surface and fits against the outer wall surface of the pressure plate.

[0015] Preferably, the outlet housing, the intermediate housing, and the coarse filter housing are all flat elliptical shapes. The top, bottom, and sides of the intermediate housing are provided with support blocks for easy placement, and the outer surface of the intermediate housing is provided with reinforcing ribs.

[0016] Preferably, both the main filter element and the safety filter element are flat elliptical shapes.

[0017] The advantages and positive effects of the air filter described in this utility model are:

[0018] This invention achieves direct current filtration by integrating a coarse filter into the air filter. This design arranges the filter assembly and pre-filter along the main axis of the housing, which helps to minimize the space required for their arrangement while meeting the engine's airflow requirements. Furthermore, the air is filtered by the coarse filter and then by the main filter and safety filter, which effectively improves the overall filtration efficiency, reduces the filtration burden on the filter assembly, and thus extends the service life of the air filter.

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an air filter according to the present invention;

[0021] Figure 2 This is an exploded view of an air filter according to the present invention;

[0022] Figure 3 This is a perspective view of the air outlet shell of this utility model;

[0023] Figure 4 This is a front view of the air outlet housing of this utility model;

[0024] Figure 5 This is a schematic diagram of the intermediate shell structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the coarse filter housing structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the pressure plate of this utility model;

[0027] Figure 8 This is a schematic diagram of the pressure plate of this utility model from another perspective;

[0028] Figure 9 This is a schematic diagram of the cyclone tube structure of this utility model;

[0029] Figure 10 This is a schematic diagram of the spring-loaded assembly of this utility model.

[0030] Figure Labels

[0031] 1. Exhaust housing; 101. Exhaust port; 2. Front sealing ring; 3. Middle housing; 4. Safety filter element; 5. Main filter element; 6. Rear sealing ring; 7. Screw 1; 8. Pressure plate; 9. Coarse filter sealing ring; 10. Dust discharge valve; 11. Cyclone tube; 12. Coarse filter housing; 13. Hanging spring assembly; 131. Hook; 132. Handle; 133. Hanging spring seat;

[0032] 14. Screw hole one; 15. Limiting hole; 16. Outer extension; 17. Limiting protrusion; 18. Ash discharge port; 19. Main filter element limiting plate; 20. Air outlet pipe; 21. Safety filter element limiting plate; 22. Safety filter element sealing surface; 23. Main filter element sealing surface; 24. Front sealing ring mounting groove; 25. Dust discharge port; 26. Hanging spring groove; 27. Screw two; 28. Screw hole two. Detailed Implementation

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0035] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] like Figures 1-10As shown, an air filter includes a coarse filter housing 12, an intermediate housing 3, an air outlet housing 1, a safety filter element 4, a main filter element 5, a pressure plate 8, and a swirl tube 11. One end of the coarse filter housing 12 is connected to one end of the intermediate housing 3 via a hanging spring assembly 13, and the other end of the intermediate housing 3 is connected to the end of the air outlet housing 1. An air outlet 101 is provided on the air outlet housing 1.

[0037] Safety filter element 4 is positioned between the outlet housing 1 and the main filter element, and main filter element 5 is positioned between the outlet housing 1 and the pressure plate 8. The inner wall of the outlet housing 1 is provided with a safety filter element sealing surface 22 and a main filter element sealing surface 23. The safety filter element 4 and the main filter element 5 are arranged opposite each other, and the outer surface of the safety filter element 4 is in close contact with the safety filter element sealing surface 22. The outer surface of one end of the main filter element 5 is in close contact with the main filter element sealing surface 23.

[0038] The pressure plate 8 is connected inside the coarse filter housing 12. Multiple air outlet pipes 20 are evenly arranged on one end face of the pressure plate 8. One end of multiple swirling pipes 11 abuts against the end face of the pressure plate 8, and the air outlet pipes 20 are located inside the swirling pipes 11. The other end of the swirling pipes 11 is limited on the limiting hole 15 of the coarse filter housing 12. Air enters the swirling pipes 11 from the coarse filter housing 12 and passes through the air outlet pipes 20, the main filter element 5, and the safety filter element 4 in sequence before being output from the air outlet 101.

[0039] A safety filter element limiting plate 21 is provided at the front end of the inner wall of the air outlet housing 1. One end of the safety filter element abuts against the safety filter element limiting plate 21, and the other end of the safety filter element abuts against the front end of the main filter element. A main filter element limiting plate 19 is provided on the inner wall of the front end of the pressure plate 8. One end of the main filter element abuts against the main filter element sealing surface 23, and the other end of the main filter element abuts against the main filter element limiting plate 19.

[0040] The inner wall of the coarse filter housing 12 is provided with multiple screw holes 14, and the end face of the pressure plate 8 is provided with multiple through holes 1. Multiple screws 7 pass through the pressure plate 8 and are threaded to the screw holes 14 on the coarse filter housing 12. The end face of the exhaust housing 1 is provided with multiple through holes 2, and one end face of the intermediate housing 3 is provided with multiple screw holes 28. Multiple screws 27 pass through the exhaust housing 1 and are threaded to the screw holes 28 on the intermediate housing 3.

[0041] The cyclone tube 11 is cone-shaped. The limiting protrusion 17 is located at the bottom of one end of the cyclone tube 11 with a small diameter. The bottom of one end of the cyclone tube 11 with a large diameter is provided with a ash discharge port 18. The limiting hole 15 of the coarse filter housing 12 is provided with a limiting groove. The limiting protrusion 17 is engaged with the limiting groove.

[0042] The bottom of the coarse filter housing 12 is provided with a dust discharge port 25, and the bottom of the dust discharge port 25 is threadedly connected to a dust discharge valve 10. All the dust discharge ports 18 face the dust discharge valve 10.

[0043] The spring mounting assembly 13 includes a spring mounting seat 133, a hook 131, and a handle 132. Multiple spring mounting seats 133 are evenly arranged on the front end of the outer surface of the coarse filter housing 12. One end of the handle 132 is rotatably connected to the spring mounting seat 133. The end of the hook 131 is rotatably connected to the middle of the handle 132. Multiple spring mounting grooves 26 are evenly arranged on the outer wall of the rear end face of the intermediate housing 3. The top end of the hook 131 is engaged in the spring mounting groove 26.

[0044] The vent pipe 20 is cone-shaped.

[0045] A front sealing ring mounting groove 24 is provided on one end face of the outlet housing 1, and the front sealing ring 2 is limited between the front sealing ring mounting groove 24 and the front end face of the intermediate housing 3. An extension 16 is provided on the front end face of the coarse filter housing 12, and the coarse filter sealing ring 9 is limited between the extension 16 and the rear end face of the intermediate housing 3. An inner stepped surface is provided on the front end of the coarse filter housing 12, and the rear sealing ring 6 is fitted onto the inner stepped surface and fits against the outer wall surface of the pressure plate 8.

[0046] The exhaust housing 1, the intermediate housing 3, and the coarse filter housing 12 are all flat elliptical shapes. The top, bottom, and sides of the intermediate housing 3 are provided with support blocks for easy placement, and the outer surface of the intermediate housing 3 is provided with reinforcing ribs.

[0047] Both the main filter element 5 and the safety filter element 4 are flat oval shapes.

[0048] The installation process of this utility model is as follows:

[0049] First, assemble the coarse filter. Place the coarse filter housing 12 with its opening facing upwards on the workbench. Align the limiting protrusion 17 on the cyclone tube 11 with the limiting groove on the limiting hole 15 on the coarse filter housing 12. Insert multiple cyclone tubes 11 in sequence. At this time, all the ash discharge ports 18 on the cyclone tubes 11 are facing the dust discharge port 25.

[0050] Next, place the coarse filter sealing ring 9 flat on the outer extension 16 of the coarse filter housing 12, then fit the sealing ring 6 onto the inner stepped surface of the coarse filter housing 12, align the air outlet pipe 20 on the pressure plate 8 with the cyclone pipe 11 and place it flat into the coarse filter housing 12, insert the screw 7 through the through hole on the pressure plate 8 into the screw hole 14 on the coarse filter housing 12, and tighten it with a screwdriver.

[0051] Next, the safety filter element 4 is installed into the cavity of the air outlet housing 1. The front end of the safety filter element 4 directly abuts against the safety filter element limiting plate 21 inside the cavity, and the sealing strip at the edge of the safety filter element 4 forms a reliable seal with the safety filter element sealing surface 22. The main filter element 5 is then installed. The sealing strip at the front end of the main filter element 5 forms a reliable seal with the main filter element sealing surface 23, and the rear end of the main filter element 5 abuts against the main filter element limiting plate 19.

[0052] Place the front sealing ring 2 into the front sealing ring mounting groove 24 of the exhaust housing 1, and then connect the exhaust housing 1 and the intermediate housing 3 together with screw 27.

[0053] Hook the hook 131 of the spring assembly 13 into the spring groove 26 on the intermediate housing 3, and fasten the spring assembly 13 to complete the assembly operation.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. An air cleaner characterized by: It includes a coarse filter housing, an intermediate housing, an outlet housing, a safety filter element, a main filter element, a pressure plate, and a cyclone tube. One end of the coarse filter housing is connected to one end of the intermediate housing via a hanging spring assembly, and the other end of the intermediate housing is connected to one end of the outlet housing. The outlet housing is provided with an outlet. The safety filter element is positioned between the air outlet housing and the main filter element, and the main filter element is positioned between the air outlet housing and the pressure plate. The inner wall surface of the air outlet housing is provided with a safety filter element sealing surface and a main filter element sealing surface. The safety filter element and the main filter element are arranged opposite to each other, and the outer surface of the safety filter element is in close contact with the safety filter element sealing surface. The outer surface of one end of the main filter element is in close contact with the main filter element sealing surface. The pressure plate is connected inside the coarse filter housing. Multiple air outlet pipes are evenly arranged on one end face of the pressure plate. One end of the multiple cyclone pipes abuts against the end face of the pressure plate, and the air outlet pipe is located inside the cyclone pipe. The other end of the cyclone pipe is limited to the limiting hole of the coarse filter housing. Air enters the cyclone pipe from the coarse filter housing and passes through the air outlet pipe, the main filter element, and the safety filter element in sequence before being output from the air outlet.

2. An air cleaner as set forth in claim 1 wherein: A safety filter element limiting plate is provided at the front end of the inner wall of the air outlet housing. One end of the safety filter element abuts against the safety filter element limiting plate, and the other end of the safety filter element abuts against the front end of the main filter element. A main filter element limiting plate is provided on the inner wall of the front end of the pressure plate. One end of the main filter element abuts against the sealing surface of the main filter element, and the other end of the main filter element abuts against the main filter element limiting plate.

3. An air cleaner as set forth in claim 1 wherein: The inner wall of the coarse filter housing is provided with multiple screw holes 1, and the end face of the pressure plate is provided with multiple through holes 1. Multiple screws 1 pass through the pressure plate and are threaded to the screw holes 1 on the coarse filter housing; the end face of the air outlet housing is provided with multiple through holes 2, and the end face of the intermediate housing is provided with multiple screw holes 2. Multiple screws 2 pass through the air outlet housing and are threaded to the screw holes 2 on the intermediate housing.

4. An air cleaner as set forth in claim 3 wherein: The cyclone tube is cone-shaped, and a limiting protrusion is provided at the bottom of one end of the cyclone tube with a smaller diameter. A ash discharge port is provided at the bottom of one end of the cyclone tube with a larger diameter. A limiting groove is provided on the limiting hole of the coarse filter housing, and the limiting protrusion engages with the limiting groove.

5. An air cleaner as set forth in claim 4 wherein: The bottom of the coarse filter housing is provided with a dust discharge port, and a dust discharge valve is threadedly connected to the bottom of the dust discharge port. All the dust discharge ports face the dust discharge valve.

6. An air cleaner as set forth in claim 1 wherein: The spring mounting assembly includes a spring mounting seat, a hook, and a handle. Multiple spring mounting seats are evenly arranged on the front end of the outer surface of the coarse filter housing. One end of the handle is rotatably connected to the spring mounting seat, and the end of the hook is rotatably connected to the middle of the handle. Multiple spring mounting grooves are evenly arranged on the outer wall of the rear end face of the intermediate housing, and the top end of the hook is engaged in the spring mounting groove.

7. An air cleaner as set forth in claim 1 wherein: The air outlet pipe is cone-shaped.

8. An air cleaner as set forth in claim 1 wherein: A front sealing ring mounting groove is provided on one end face of the air outlet housing, and the front sealing ring is limited between the front sealing ring mounting groove and the front end face of the intermediate housing; an extension is provided on the front end face of the coarse filter housing, and the coarse filter sealing ring is limited between the extension and the rear end face of the intermediate housing; an inner stepped surface is provided on the front end of the coarse filter housing, and the rear sealing ring is fitted on the inner stepped surface and fits against the outer wall surface of the pressure plate.

9. An air cleaner as set forth in claim 1 wherein: The exhaust housing, intermediate housing, and coarse filter housing are all flat elliptical in shape. The top, bottom, and sides of the intermediate housing are provided with support blocks for easy placement, and the outer surface of the intermediate housing is provided with reinforcing ribs.

10. An air cleaner as set forth in claim 2 wherein: Both the main filter element and the safety filter element are flat elliptical in shape.

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