An air filter

Abstract

The utility model discloses an air filter, including casing, shell cover and filter core, filter core sets up in the inside of casing, shell cover is detachably connected with casing, and filter core includes connecting ring, filter material and apron, and connecting ring, filter material and apron are fixed in proper order from below to top setting, and filter material is annular and is set along the upper end of connecting ring, and the lateral surface of casing is provided with the air inlet, and the bottom surface of casing is provided with the air outlet, and the periphery of casing bottom corresponding air outlet is equipped with first limit ring, and the periphery of first limit ring is equipped with first snap ring, and the inner wall of connecting ring is clamped into the surface of first limit ring, and the bottom surface of connecting ring is equipped with ring groove corresponding first snap ring, and first snap ring is clamped into ring groove, and the lower end of shell cover is equipped with limit structure, and limit structure is used for extruding apron to move down. The utility model provides an air filter, and the limit structure between filter core and casing is improved, thereby ensuring the stability of filter core in the inside of casing, and also ensuring the singleness of air flow path, and improving the filtering effect.

Description

Technical Field

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

[0002] In existing equipment such as engines and compressors that require air intake assistance, it is necessary to install an air filter at the air intake to filter the intake air and prevent impurities from being brought into the equipment, thus affecting its service life.

[0003] Furthermore, during long-term use, the filter element in the air filter needs to be replaced in a timely manner to prevent too much dust and impurities from adhering to the filter element and affecting the airflow speed. At the same time, it is also necessary to ensure the stability of the filter element during installation in the air filter to avoid gaps at the installation point, which would allow unfiltered air to pass through the gaps, causing dust and impurities to enter the equipment and affect the filtration effect. Therefore, an air filter with good installation sealing and easy filter element replacement is needed. Utility Model Content

[0004] The purpose of this utility model is to provide an air filter that improves the limiting structure between the filter element and the housing, thereby ensuring the stability of the filter element inside the housing and ensuring the single airflow path, thus improving the filtration effect.

[0005] The technical solution adopted by the air filter disclosed in this utility model is: An air filter includes a housing, a cover, and a filter element. The filter element is disposed inside the housing. The cover is detachably connected to the housing. The filter element includes a connecting ring, filter media, and a cover plate. The connecting ring, filter media, and cover plate are fixedly arranged sequentially from bottom to top, and the filter media is arranged in a ring shape along the upper end of the connecting ring. An air inlet is provided on the side of the housing, and an air outlet is provided on the bottom surface of the housing. A first limiting ring is provided on the periphery of the bottom of the housing corresponding to the air outlet. A first retaining ring is provided on the periphery of the first limiting ring. The inner wall of the connecting ring is engaged with the surface of the first limiting ring, and the bottom surface of the connecting ring is provided with a ring groove corresponding to the first retaining ring. The first retaining ring is engaged in the ring groove. A limiting structure is provided at the lower end of the cover plate, and the limiting structure is used to squeeze the cover plate downward.

[0006] As a preferred embodiment, the housing is provided with a diverter plate corresponding to the air inlet. The diverter plate is arc-shaped and protrudes towards the air inlet, and there is a gap between the diverter plate and the filter element and the inner wall of the housing.

[0007] As a preferred embodiment, the upper end of the housing is provided with a diagonal strip along the outer surface, and the inner wall of the cover is provided with a corresponding locking block. The housing and the cover are connected by threads through the diagonal strip and the locking block.

[0008] As a preferred embodiment, the surface of the shell cover is provided with a number of protrusions at intervals.

[0009] As a preferred embodiment, the cover plate has a circular recessed structure at its center, and the limiting structure of the cover plate includes a second limiting ring and a second retaining ring. The second limiting ring is inserted into the recessed structure, and the second retaining ring abuts against the upper end of the cover plate.

[0010] As a preferred embodiment, the horizontal cross-section of the filter material is annular, and the filter material is arranged in a wavy structure along its axis.

[0011] The beneficial effects of the air filter disclosed in this utility model are as follows: When installing the filter element, the connecting ring at the lower end of the filter element needs to be aligned with the first limiting ring around the air outlet and inserted. At the same time, the ring groove on the connecting ring is inserted into the first retaining ring to achieve precise locking and fixing. The first retaining ring and the first limiting ring improve the connection and sealing between the bottom of the filter element and the housing, reducing the leakage of air from the installation gap. Meanwhile, the cover plate at the upper end of the filter element is squeezed by the limiting structure, ensuring the installation stability of the filter element inside the housing. Furthermore, the cover plate structure at the upper end of the filter element ensures that the air entering the housing through the air inlet can only pass through the filter element, enter the interior of the filter element, and then be discharged from the air outlet, ensuring the single airflow path and improving the filtration effect of the filter element. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of an air filter according to this utility model.

[0013] Figure 2 This is a schematic diagram of the housing structure of an air filter according to the present invention.

[0014] Figure 3 This is a schematic diagram of the shell cover and filter element structure of an air filter according to this utility model. Detailed Implementation

[0015] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings: Please refer to Figure 1 and Figure 2An air filter includes a housing 10, a cover 20, and a filter element 30. The filter element 30 is disposed inside the housing 10. The cover 20 is detachably connected to the housing 10. The filter element 30 includes a connecting ring 31, a filter material 32, and a cover plate 33. The connecting ring 31, the filter material 32, and the cover plate 33 are fixedly arranged sequentially from bottom to top. The filter material 32 is arranged in a ring along the upper end of the connecting ring 31. An air inlet 11 is provided on the side of the housing 10, and an air outlet 12 is provided on the bottom surface of the housing 10. A first limiting ring 13 is provided on the periphery of the air outlet 12 at the bottom of the housing 10. A first retaining ring 14 is provided on the periphery of the first limiting ring 13. The inner wall of the connecting ring 31 is engaged with the surface of the first limiting ring 13, and the bottom surface of the connecting ring 31 is provided with an annular groove corresponding to the first retaining ring 14. The first retaining ring 14 is engaged in the annular groove. A limiting structure is provided at the lower end of the cover 20. The limiting structure is used to squeeze the cover plate 33 to move downward.

[0016] When installing the filter element 30, the connecting ring 31 at the lower end of the filter element 30 needs to be aligned with the first limiting ring 13 around the air outlet 12 and inserted. At the same time, the groove on the connecting ring 31 is inserted into the first retaining ring 14 to achieve precise locking and fixing. The first retaining ring 14 and the first limiting ring 13 improve the sealing of the connection between the bottom of the filter element 30 and the housing 10, reducing the possibility of air leakage from the installation gap. Meanwhile, the cover plate 33 at the upper end of the filter element 30 is squeezed by the limiting structure, ensuring the installation stability of the filter element 30 inside the housing 10. Furthermore, the cover plate 33 structure at the upper end of the filter element 30 ensures that the air entering the housing 10 from the air inlet 11 can only pass through the filter element 30, enter the interior of the filter element 30, and then be discharged from the air outlet 12, ensuring the single airflow path and improving the filtration effect of the filter element 30.

[0017] To prevent the air from entering through the air inlet 11 from having a large impact force that could damage the filter element 30, and also to better divert and guide the air to circulate around the filter element 30 for filtration and improve filtration efficiency, a diverter plate 15 is provided inside the housing 10 corresponding to the air inlet 11. The diverter plate 15 has an arc-shaped protrusion 22 facing the air inlet 11, and there is a gap between the diverter plate 15 and the filter element 30 and the inner wall of the housing 10. When the air enters from the air inlet 11, it first hits the diverter plate 15, and the diverter plate 15 guides the air to both sides.

[0018] In the above scheme, the upper end of the housing 10 is provided with a diagonal strip 16 along the outer surface, and the inner wall of the cover 20 is provided with a corresponding locking block 21. The housing 10 and the cover 20 are connected by threads through the diagonal strip 16 and the locking block 21, and a number of protrusions 22 are provided at intervals on the surface of the cover 20. People can hold the protrusions 22 and tighten the cover 20 to the housing 10 by rotating it, or open the cover 20. When the cover 20 is tightened, the gap between the cover 20 and the housing 10 will be reduced, so that the limiting structure inside the cover 20 will squeeze the cover plate 33 of the filter element 30 to move downward, thereby achieving the purpose of fixing the filter element 30.

[0019] Please refer to Figure 3 The cover plate 33 has a circular recessed structure at its center. The limiting structure of the shell cover 20 includes a second limiting ring 23 and a second retaining ring 24. The second limiting ring 23 is inserted into the recessed structure, and the second retaining ring 24 abuts against the upper end of the cover plate 33. The second limiting ring 23 limits the cover plate 33, thereby limiting the radial displacement of the filter element 30 in the shell 10 by the cooperation of the first limiting ring 13 and the second limiting ring 23, so as to avoid shaking. At the same time, the second retaining ring 24 presses against the cover plate 33, thereby achieving the purpose of fixing the filter element 30 in the axial direction.

[0020] The horizontal cross-section of the filter media 32 is annular, and it is arranged in a wave-like structure along the axis of the filter media 32. The wave-like structure increases the contact area between the filter media 32 and the air, improves the filtration effect, and also allows dust, debris and other impurities to adhere better to the surface of the filter media 32.

[0021] This utility model provides an air filter. When installing the filter element, the connecting ring at the lower end of the filter element needs to be aligned with the first limiting ring around the air outlet and inserted. At the same time, the groove on the connecting ring is inserted into the first retaining ring to achieve precise locking and fixing. The first retaining ring and the first limiting ring improve the connection and sealing between the bottom of the filter element and the housing, reducing air leakage from the installation gap. Meanwhile, the cover plate at the upper end of the filter element is squeezed by the limiting structure, ensuring the installation stability of the filter element inside the housing. Furthermore, the cover plate structure at the upper end of the filter element ensures that the air entering the housing through the air inlet can only pass through the filter element, enter the interior of the filter element, and then be discharged from the air outlet, ensuring a single airflow path and improving the filtration effect of the filter element.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this 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 be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An air filter, characterized in that, The device includes a housing, a cover, and a filter element. The filter element is disposed inside the housing. The cover is detachably connected to the housing. The filter element includes a connecting ring, filter media, and a cover plate. The connecting ring, filter media, and cover plate are fixedly arranged sequentially from bottom to top, and the filter media is arranged in a ring shape along the upper end of the connecting ring. An air inlet is provided on the side of the housing, and an air outlet is provided on the bottom surface of the housing. A first limiting ring is provided on the periphery of the bottom of the housing corresponding to the air outlet. A first retaining ring is provided on the periphery of the first limiting ring. The inner wall of the connecting ring is engaged with the surface of the first limiting ring, and the bottom surface of the connecting ring is provided with a ring groove corresponding to the first retaining ring. The first retaining ring is engaged in the ring groove. A limiting structure is provided at the lower end of the cover plate, and the limiting structure is used to squeeze the cover plate downward.

2. An air filter as described in claim 1, characterized in that, The housing is equipped with a diverter plate corresponding to the air inlet. The diverter plate is arc-shaped and protrudes towards the air inlet, and there is a gap between the diverter plate and the filter element and the inner wall of the housing.

3. An air filter as described in claim 1, characterized in that, The upper end of the housing is provided with a diagonal strip along the outer surface, and the inner wall of the cover is provided with a corresponding locking block. The housing and the cover are connected by threads through the diagonal strip and the locking block.

4. An air filter as described in claim 3, characterized in that, The surface of the shell cover is provided with several protrusions at intervals.

5. An air filter as described in claim 1, characterized in that, The cover plate has a circular recessed structure at its center. The limiting structure of the cover plate includes a second limiting ring and a second retaining ring. The second limiting ring is inserted into the recessed structure, and the second retaining ring abuts against the upper end of the cover plate.

6. An air filter as described in claim 1, characterized in that, The filter media has a ring-shaped horizontal cross-section and is arranged in a wavy structure along the axis of the filter media.

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