Sealing gasket, filter element assembly and air filter

Abstract

The utility model provides a sealing gasket, a filter element assembly and an air filter. The sealing gasket is of an annular structure, the longitudinal section of the sealing gasket is in an S shape, the sealing gasket comprises a first concave body part (6) and a second concave body part (5) which are sequentially connected, an opening of the first concave body part (6) faces the inner circumferential side of the sealing gasket, and an opening of the second concave body part (5) faces the outer circumferential side of the sealing gasket. According to the sealing gasket disclosed by the utility model, the bonding strength of the sealing gasket and the support frame can be improved, the stability and the reliability of a matching structure of the sealing gasket and the support frame are improved, and meanwhile, the sealing gasket can play an effective buffering role in the installation of a filter element assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of air filtering devices, and more particularly, to a gasket, a filter element assembly and an air filter. Background Art

[0002] An air filter is a device used to filter impurities and particulate matters in the air, and is usually used in devices such as automobiles, air conditioners, air purifiers, etc. Its basic structure includes a filter element, a support frame, a housing and a gasket. The support frame is arranged outside the filter element to support and fix the filter element. The gasket is arranged between the housing and the support frame to seal the mating position of the housing and the support frame.

[0003] The air filter intercepts particulate matters and impurities in the air through the filtering medium in the filter element, making the air clean. When air passes through the filter element, the particulate matters and impurities will be intercepted by the grids or layers of filter meshes in the filter element, and the clean air can enter the device interior through the filter element.

[0004] The gasket is fixedly connected to the support frame by injecting glue onto the support frame. When the gasket is combined with the support frame, the gasket usually falls off from the support frame due to insufficient bonding force between the gasket and the support frame, reducing the stability and reliability of the mating structure between the gasket and the support frame. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a gasket, a filter element assembly and an air filter, which can improve the bonding strength between the gasket and the support frame, improve the stability and reliability of the mating structure between the gasket and the support frame, and can effectively buffer the installation of the filter element assembly at the same time.

[0006] To achieve the above purpose, according to one aspect of the utility model, a gasket is provided. The gasket is of an annular structure, and the longitudinal section of the gasket is in an S shape. The gasket includes a first concave body part and a second concave body part connected in sequence. The opening of the first concave body part faces the inner peripheral side of the gasket, and the opening of the second concave body part faces the outer peripheral side of the gasket.

[0007] Further, the gasket includes a first transverse wall, a first vertical wall, a second transverse wall, a second vertical wall and a third transverse wall. The first transverse wall, the first vertical wall and the second transverse wall form the first concave body part, and the second transverse wall, the second vertical wall and the third transverse wall form the second concave body part.

[0008] Further, the second concave body part is located above the first concave body part.

[0009] Further, the second concave body part is in a C shape, and the first concave body part is in a U shape.

[0010] Furthermore, a buffer convex part is arranged at the bottom of the first concave body part.

[0011] Furthermore, the buffer convex part is an annular convexity which extends along the circumferential direction of the first concave body part, and the annular convexity protrudes axially downward from the bottom surface of the first concave body part.

[0012] Furthermore, there are two annular convexities, one annular convexity is arranged on the inner circumferential side of the bottom surface of the first concave body part, and the other annular convexity is arranged on the outer circumferential side of the bottom surface of the first concave body part.

[0013] Furthermore, the cross section of the annular convexity is triangular, trapezoidal or arc-shaped.

[0014] According to another aspect of the present utility model, a filter element assembly is provided, which includes a filter element body, a support frame and the above-mentioned gasket. The support frame is arranged outside the filter element body and supports the filter element body. The support frame includes a support cylinder body and an annular side plate which is arranged on the outer circumference of the support cylinder body and extends radially outward. The first concave body part is sleeved outside the annular side plate, and the second concave body part is sleeved outside the support cylinder body.

[0015] According to another aspect of the present utility model, an air filter is provided, which includes a filter element assembly and a housing. The filter element assembly is installed in the housing, and the filter element assembly is the above-mentioned filter element assembly.

[0016] Applying the technical solution of the present utility model, the gasket is of an annular structure, the longitudinal section of the gasket is in an S shape, the gasket includes a first concave body part and a second concave body part which are connected in sequence. The opening of the first concave body part faces the inner circumferential side of the gasket, and the opening of the second concave body part faces the outer circumferential side of the gasket. Using the gasket with an S-shaped longitudinal section as the gasket outside the support frame, the first concave body part of the S-shaped gasket can be used to wrap the annular side plate of the support frame, increasing the sealing cooperation area between the gasket and the support frame, enabling the S-shaped gasket to form a larger contact area with the support frame, having better wrapping property, improving the bonding strength between the gasket and the support frame, effectively preventing the gasket from falling off the support frame, and improving the stability and reliability of the matching structure between the gasket and the support frame. At the same time, since the gasket itself has elastic performance and the gasket wraps around the bottom of the annular side plate, during the installation process of the filter element assembly, the gasket can form a buffering effect on the installation of the filter element assembly and effectively protect the support frame. Description of the Drawings

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 A three-dimensional structural view of a filter element assembly according to an embodiment of the present utility model is shown;

[0019] Figure 2 A bottom structural view of a filter element assembly according to an embodiment of the present utility model is shown;

[0020] Figure 3 A sectional structural view of a filter element assembly according to an embodiment of the present utility model is shown;

[0021] Figure 4 A partially enlarged view of a filter element assembly at L according to an embodiment of the present utility model is shown;

[0022] Figure 5 A three-dimensional structural view of a support frame of a filter element assembly according to an embodiment of the present utility model is shown;

[0023] Figure 6 A forming method diagram of a filter element assembly according to an embodiment of the present utility model is shown.

[0024] Among them, the above-mentioned drawings include the following reference numerals:

[0025] 1. Filter element body; 2. Support frame; 3. Annular side plate; 4. Sealing gasket; 5. Second concave body part; 6. First concave body part; 7. Glue inlet point; 8. Protrusion; 9. Flow-through channel; 10. First plate surface; 11. Second plate surface; 12. Buffer convex part; 13. Bonding part. Detailed implementation manners

[0026] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] Combined with reference to Figures 1 to 5 As shown, according to an embodiment of the present utility model, the sealing gasket 4 is of an annular structure, the longitudinal section of the sealing gasket 4 is in an S shape, the sealing gasket 4 includes a first concave body part 6 and a second concave body part 5 connected in sequence, the opening of the first concave body part 6 faces the inner peripheral side of the sealing gasket 4, and the opening of the second concave body part 5 faces the outer peripheral side of the sealing gasket 4.

[0028] In one embodiment, the second concave body part 5 is located above the first concave body part 6.

[0029] In a traditional filter element assembly, the gasket 4 is generally C-shaped and is arranged between the support cylinder of the support frame 2 and the outer shell, so as to form a seal between the support cylinder of the support frame 2 and the outer shell. In this structure, when the gasket 4 is formed on the outside of the support frame 2 by injection molding, since only the back side of the opening of the C-shaped structure of the gasket 4 is bonded to the support frame 2, the bonding surface is small, resulting in insufficient bonding strength. During use, the gasket 4 often easily falls off the support frame 2, resulting in insufficient sealing performance between the gasket 4 and the support frame 2 for the shell, and reducing the stability and reliability of the matching structure between the gasket and the support frame.

[0030] In the embodiment of the present utility model, the cross-section of the gasket is S-shaped. During the injection molding process outside the support frame 2, an S-shaped gasket 4 can be injection molded. The second concave body part 5 located on the upper side of the S-shaped gasket 4 wraps around the outer periphery of the support cylinder of the support frame 2, and the first concave body part 6 located on the lower side wraps around the annular side plate 3 of the support frame 2. By adding the structure of the first concave body part 6 to the second concave body part 5, the sealing cooperation area between the gasket 4 and the support frame 2 is increased, so that the S-shaped gasket 4 can form a larger contact area with the support frame 2, has better wrapping performance, can improve the bonding strength between the gasket 4 and the support frame 2, effectively avoid the gasket 4 falling off the support frame 2, and improve the stability and reliability of the matching structure between the gasket 4 and the support frame 2. At the same time, since the gasket 4 itself has elastic properties and the gasket 4 wraps around the bottom of the annular side plate 3 of the support frame 2, during the installation process of the filter element assembly, the gasket 4 can form a buffering effect on the installation of the filter element assembly and effectively protect the support frame 2.

[0031] Compared with the traditional filter element assembly, using the S-shaped gasket 4 can not only increase the contact area between the gasket 4 and the support frame 2, but also use the first concave body part 6 of the S-shaped gasket 4 to wrap the annular side plate 3, so that a tighter combination is formed between the gasket 4 and the support frame 2, greatly increasing the bonding strength, and can form a limit in the vertical direction between the gasket 4 and the support frame 2, effectively buffering the impact during the installation process of the support frame 2, further reducing the risk of the gasket 4 falling off the support frame 2 and the risk of the support frame 2 being damaged by impact, improving the stability and reliability of the matching structure between the gasket and the support frame, and improving the safety during the installation process of the filter element assembly.

[0032] In one embodiment, the gasket 4 includes a first horizontal wall, a first vertical wall, a second horizontal wall, a second vertical wall and a third horizontal wall. The first horizontal wall, the first vertical wall and the second horizontal wall form the first concave body part 6, and the second horizontal wall, the second vertical wall and the third horizontal wall form the second concave body part 5.

[0033] In the gasket 4 of this embodiment, the opening of the first concave body portion 6 faces the support frame 2, the opening of the second concave body portion 5 faces away from the support frame 2, and the second vertical wall wraps around the outer periphery of the support cylinder of the support frame 2.

[0034] In this embodiment, the gasket includes two C-shaped parts. The C-shaped part on the upper side is the second concave body portion 5, which includes a first transverse wall, a first vertical wall, and a second transverse wall. The C-shaped part on the lower side is the first concave body portion 6, which includes a second transverse wall, a second vertical wall, and a third transverse wall. The second transverse walls of the two C-shaped parts are shared.

[0035] In this embodiment, the C-shaped part on the upper side abuts against the support cylinder of the support frame 2, and the C-shaped part on the lower side wraps around the annular side plate 3, so as to have a larger contact area with the support frame 2 and form a greater bonding strength.

[0036] In one embodiment, the second concave body portion 5 is C-shaped, and the first concave body portion 6 is U-shaped.

[0037] In this embodiment, since the second concave body portion 5 wraps around the outer periphery of the support frame 2 and the opening faces away from the outer periphery of the support cylinder of the support frame 2, the second concave body portion 5 adopts a C-shaped structure, which can have greater deformation performance, and it is more convenient to apply an elastic force to the second vertical wall to better fit the second vertical wall on the support cylinder of the support frame 2, forming a good sealing performance between the outer periphery of the support frame 2 and the outer shell; the opening of the first concave body portion 6 faces the annular side plate 3 of the support frame 2 and wraps around the annular side plate 3. Since the cross-sectional shape of the annular side plate 3 is rectangular, the first concave body portion 6 is U-shaped, which can form a structure more adaptable to the annular side plate 3, improve the matching degree between the first concave body portion 6 and the annular side plate 3, and ensure the bonding strength between the first concave body portion 6 and the annular side plate 3, thereby more effectively preventing the gasket 4 from detaching from the support frame 2 during use.

[0038] In one embodiment, a buffer convex portion 12 is provided at the bottom of the first concave body portion 6.

[0039] For the gasket of this embodiment, the axial sealing effect is mainly achieved through the deformation of the upper second concave body portion 5. The bottom of the first concave body portion 6 is used to cooperate with the installation structure below the support frame 2. Since during the assembly process of the filter element assembly, the installation structure will form an impact on the gasket and the annular side plate 3, which is likely to cause the annular side plate 3 to deform. Therefore, to avoid this situation, a buffer convex portion 12 is provided at the bottom of the first concave body portion 6 that bears a large impact force.

[0040] In this embodiment, by providing the buffer convex portion 12 on the bottom surface of the first concave body portion 6, during the assembly process of the filter element assembly, the buffer convex portion 12 can buffer the acting force on the mounting structure below the support frame 2 during the installation process, thereby effectively protecting the annular side plate 3 and preventing the annular side plate 3 from being deformed or broken due to impact during the installation of the filter element assembly.

[0041] In one embodiment, the buffer convex portion 12 is a plurality of convex strips or convex columns arranged at intervals along the circumferential direction of the gasket 4.

[0042] In one embodiment, the buffer convex portion 12 is an annular protrusion, the annular protrusion extends along the circumferential direction of the first concave body portion 6, and the annular protrusion protrudes axially downward from the bottom surface of the first concave body portion 6.

[0043] In this embodiment, using the annular protrusion as the buffer convex portion 12 can form a uniform protrusion structure along the circumferential direction at the bottom of the first concave body portion 6, which can provide an even buffer for the bottom of the first concave body portion 6 and has a better buffer effect. In addition, when the filter element assembly is assembled, the annular protrusion at the bottom of the first concave body portion 6 fits with the mounting structure, and the annular protrusion deforms, which can play the role of an annular sealing ring, thereby forming an axial sealing effect between the bottom of the first concave body portion 6 and the mounting structure. Cooperating with the axial sealing effect of the second concave body portion 5, a double sealing effect is formed, improving the sealing effect and sealing performance of the gasket.

[0044] In one embodiment, two or more annular protrusions are provided on the bottom surface of the first concave body portion 6.

[0045] In one embodiment, there are two annular protrusions, one annular protrusion is arranged on the inner circumferential side of the bottom surface of the first concave body portion 6, and the other annular protrusion is arranged on the outer circumferential side of the bottom surface of the first concave body portion 6.

[0046] In this embodiment, by arranging the two annular protrusions on the inner circumferential side and the outer circumferential side of the bottom surface of the first concave body portion 6 respectively, during the assembly process of the filter element assembly, buffering can be carried out simultaneously from the inner circumferential side and the outer circumferential side of the bottom surface of the first concave body portion 6, avoiding the problem of poor buffer effect caused by unbalanced force, and improving the protection effect of the buffer convex portion 12 on the annular side plate 3.

[0047] In one embodiment, the cross-section of the annular protrusion is triangular, trapezoidal or arc-shaped.

[0048] In this embodiment, the cross-section of the annular protrusion decreases along the direction away from the first concave body portion 6, so that during the assembly process of the filter element assembly, the first part to contact the lower mounting structure is a section with a smaller cross-section. During the initial contact for a period of time, the structural strength of the annular protrusion with a smaller cross-section is relatively low, and the deformation amount is relatively large, and the impact force transmitted to the first concave body portion 6 is relatively small. Therefore, a better buffering effect can be formed first. Then, the part with a larger cross-section gradually starts to bear force and absorbs the impact force during the assembly process. Since the impact force has been weakened and the part with a larger cross-section of the annular protrusion has a stronger absorption effect on the impact force, the impact force transmitted to the first concave body portion 6 by the part with a larger cross-section is even smaller, and the annular side plate can be more effectively protected.

[0049] Combined with reference to Figures 1 to 5 As shown, according to an embodiment of the present invention, the filter element assembly includes a filter element body 1, a support frame 2, and the above-mentioned gasket 4. The support frame 2 is arranged outside the filter element body 1 and supports the filter element body 1. The support frame 2 includes a support cylinder and an annular side plate 3 arranged on the outer periphery of the support cylinder and extending radially outward. The first concave body portion 6 is sleeved outside the annular side plate 3, and the second concave body portion 5 is sleeved outside the support cylinder.

[0050] In one embodiment, during the injection molding process of the gasket 4, at least one glue inlet point 7 is provided, and the glue inlet point 7 is arranged on the side of the first concave body portion 6 away from the support frame 2.

[0051] By arranging the glue inlet point 7 on the side of the first concave body portion 6 away from the support frame 2, the position of the glue inlet point 7 is closer to the middle position of the gasket 4. The glue enters from the glue inlet point 7 of the gasket 4, which improves the flow distance of the glue from the glue inlet point to the glue inlet end. The flow distances of the upper and lower glue inlet ends are relatively close. Compared with the traditional scheme of injecting glue from the top or bottom of the gasket 4, the flow distance of the glue is greatly reduced, thereby effectively improving the problem of product material shortage caused by too long glue flow distance and ensuring the molding effect of the product.

[0052] In one embodiment, the glue inlet point 7 is arranged corresponding to the outer side surface of the annular side plate 3 away from the filter element body 1.

[0053] In this embodiment, the position of the glue inlet point 7 is set at a position corresponding to the outer side surface of the annular side plate 3 away from the filter element body 1, so that the flow direction of the glue at the glue inlet point 7 is towards the outer side surface of the annular side plate 3. Therefore, the impact force of the glue during the glue feeding process will act on the outer side surface of the annular side plate 3, and the outer side surface of the annular side plate 3 will bear the impact force of the glue. In this way, it can not only facilitate the rapid dispersion and flow of the glue during the glue feeding process, but also avoid the impact on the structure of the gasket 4 during the flow of the glue, resulting in the deformation of the gasket 4 and ensuring the forming quality of the gasket 4.

[0054] In one embodiment, the glue inlet point 7 is arranged on the first vertical wall.

[0055] In one embodiment, along the axial direction of the annular side plate 3, the glue inlet point 7 is arranged in the area where the first vertical wall overlaps with the annular side plate 3. The area where the first vertical wall and the annular side plate 3 overlap along the axial direction of the annular side plate 3 refers to the area where the first vertical wall and the annular side plate 3 are located at the same axial position in the axial direction of the annular side plate 3, that is, Figure 4 the S area in

[0056] In one embodiment, along the axial direction of the annular side plate 3, the glue inlet point 7 is arranged in the area between the middle plane and the top surface of the first vertical wall. Specifically, the position above the middle of the first vertical wall refers to the area from the middle plane of the first vertical wall upwards to the top surface of the annular side plate 3 along the axial direction. In this embodiment, the glue inlet point 7 is arranged corresponding to the upper middle part of the annular side plate 3 in the thickness direction of the annular side plate 3, so that the glue feeding impact of the glue inlet point 7 is at the upper middle position of the annular side plate 3, and the glue quantity distribution from the glue inlet point 7 to the upper and lower sides of the annular side plate 3 is more reasonable, which can ensure that the flow rate distribution of the glue flowing from the glue inlet point 7 to the upper and lower sides matches the structure of the gasket 4, ensure that the glue can be fully fed on both the upper and lower sides of the gasket 4, effectively avoid problems such as surface defects and air bubbles caused by insufficient feeding, and improve the forming quality of the gasket 4.

[0057] In one embodiment, there are multiple glue inlet points 7, and the multiple glue inlet points 7 are arranged at intervals along the circumferential direction of the gasket 4, which can feed glue from multiple positions in the circumferential direction of the gasket 4 and improve the uniformity of glue feeding in the circumferential direction of the gasket 4.

[0058] In one embodiment, the thickness w1 of the gasket 4 at the glue inlet point 7 is greater than or equal to 1.5 mm.

[0059] In this embodiment, the thickness w1 of the gasket 4 at the glue inlet point 7 is limited, which can ensure a sufficient material flow area, avoid the problem that the thickness at the glue inlet point is too small to cause insufficient glue flow rate and unable to ensure sufficient feeding at the ends of both the upper and lower sides of the gasket 4.

[0060] The thickness h1 of the annular side plate 3 is 1 mm to 2.5 mm.

[0061] By limiting the thickness of the annular side plate 3, it is possible to avoid the problem that the structural strength of the annular side plate 3 is insufficient due to the too small thickness of the annular side plate 3 and the problem that there is not enough outer side surface to meet the injection requirements of the injection point 7, and it is also possible to avoid problems such as increased material costs caused by the too large thickness of the annular side plate 3.

[0062] In one embodiment, a plurality of protrusions 8 are provided on the first plate surface 10 on the upper side and / or the second plate surface 11 on the lower side of the annular side plate 3. The plurality of protrusions 8 are arranged at intervals along the circumferential direction of the annular side plate 3, and a flow-through channel 9 is formed between two adjacent protrusions 8.

[0063] In one embodiment, the plurality of protrusions 8 are located on a side of the annular side plate 3 that is farther from the radial center line of the annular side plate 3 relative to the filter element body 1.

[0064] In this embodiment, a protrusion 8 is provided on at least one plate surface of the annular side plate 3. The protrusion 8 is provided on the side of the annular side plate 3 away from the filter element body 1, and the protrusion 8 protrudes from the plate surface where it is located. Thus, during the injection process, the colloid can be wrapped outside the protrusion 8. The annular side plate 3 can form a hooking structure through the protrusion 8, enhancing the bonding performance between the annular side plate 3 and the gasket 4, enabling the gasket 4 to have better wrapping property, and improving the bonding strength between the annular side plate 3 and the gasket 4.

[0065] In one embodiment, protrusions 8 are provided on both the first plate surface 10 and the second plate surface 11 of the annular side plate 3. The protrusions 8 on the first plate surface 10 are arranged in a staggered manner with the protrusions 8 on the second plate surface 11, and the flow-through channels 9 on the first plate surface 10 are arranged in a staggered manner with the flow-through channels 9 on the second plate surface 11.

[0066] In this embodiment, by providing protrusions 8 on both the first plate surface 10 and the second plate surface 11, hooking structures can be formed on both the first plate surface 10 and the second plate surface 11 for the gasket 4, effectively preventing the gasket 4 from falling off the annular side plate 3 and ensuring the bonding strength between the gasket 4 and the annular side plate 3.

[0067] By providing the protrusions 8, the bonding strength between the gasket 4 and the annular side plate 3 can be effectively enhanced, so that the bonding performance between the gasket 4 and the annular side plate 3 can be ensured without drilling holes in the support frame 2.

[0068] A flow-through channel 9 is formed between the protrusions 8, which can avoid the protrusions 8 from hindering the flow of the colloid, resulting in a reduction in the fluidity of the colloid, enabling the colloid to maintain good fluidity, and allowing the colloid to flow more fully into the forming space of the gasket 4, effectively ensuring the forming quality of the gasket 4.

[0069] The protrusion 8 can be a rib or a convex column, etc.

[0070] In one embodiment, in the inlet section of the filter element body 1, an annular space is formed between the support frame 2 and the filter element body 1, and an adhesive part 13 is arranged in the annular space. The adhesive part 13 adhesively fixes the support frame 2 on the filter element body 1. By arranging the adhesive part 13, the connection and fixation between the support frame 2 and the filter element body 1 can be conveniently realized.

[0071] In one embodiment, the adhesive part 13 is hot melt adhesive. The adhesive part 13 can also be other glue structures, or the adhesive part 13 is formed by injection molding to connect the support frame 2 and the filter element body 1 together.

[0072] According to an embodiment of the present invention, the air filter includes a filter element assembly and a housing, the filter element assembly is installed in the housing, and the filter element assembly is the above-mentioned filter element assembly.

[0073] Combined with reference to Figure 6 As shown, according to an embodiment of the present invention, the forming method of the above-mentioned filter element assembly includes:

[0074] Prepare the support frame 2, wherein an annular side plate 3 extending laterally outward is arranged on the outer periphery of the support frame 2;

[0075] A ring mold is sleeved outside the support frame 2, so that a forming cavity for the gasket 4 is formed between the ring mold and the support frame 2;

[0076] A glue inlet point 7 is arranged on the side of the first concave body part 6 corresponding to the gasket 4 away from the support frame 2;

[0077] Inject glue from the glue inlet point 7 to form the gasket 4.

[0078] In this embodiment, when forming the filter element assembly, the support frame 2 can be first placed in the forming mold of the gasket 4, so that a chamber for forming the gasket 4 is formed between the support frame 2 and the inner cavity of the forming mold. Then, glue is injected through the glue inlet point 7 on the back side of the first concave body part 6 to perform injection molding of the gasket 4. Since the position of the glue inlet point 7 is located at a position close to the middle of the gasket 4, the distances from the glue entering at the glue inlet point 7 to the upper and lower end positions on both sides in the chamber for forming the gasket 4 are shortened, and the time required for the glue to flow to the end of the chamber is shorter. The glue can flow more fully to each position in the chamber, ensuring sufficient glue injection and the forming quality of the gasket 4.

[0079] In one embodiment, there are four glue inlet points 7, which are evenly arranged along the circumferential direction of the gasket 4, so that the alternating flow is more uniform and sufficient, and the forming quality is better.

[0080] In one embodiment, the step of selecting the glue inlet point 7 on the side of the first concave body part 6 corresponding to the gasket 4 that faces away from the support frame 2 includes:

[0081] Position the outer side of the annular side plate 3 away from the filter element;

[0082] Select the glue inlet point 7 at a position corresponding to the outer side of the annular side plate 3 such that the glue inlet direction of the glue inlet point 7 faces the outer side of the annular side plate 3.

[0083] In this embodiment, setting the glue inlet direction of the glue inlet point 7 to face the outer side of the annular side plate 3 enables the glue flow direction of the glue inlet point 7 to face the outer side of the annular side plate 3. The impact force of the glue during the glue inlet process will act on the outer side of the annular side plate 3, and the outer side of the annular side plate 3 will bear the impact force of the glue. In this way, it is not only convenient for the glue to disperse and flow quickly during the glue inlet process but also can avoid the impact of the glue flow on the structure of the gasket 4, resulting in deformation of the gasket 4, and ensure the molding quality of the gasket 4.

[0084] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0085] It should be noted that the terms "first", "second", etc. in the description, claims, and above-mentioned drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0086] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gasket, characterized in that, The gasket is of an annular structure, the longitudinal section of the gasket is S-shaped, the gasket includes a first concave body part (6) and a second concave body part (5) connected in sequence, the opening of the first concave body part (6) faces the inner peripheral side of the gasket, and the opening of the second concave body part (5) faces the outer peripheral side of the gasket.

2. The gasket according to claim 1, wherein, The gasket includes a first transverse wall, a first vertical wall, a second transverse wall, a second vertical wall and a third transverse wall. The first transverse wall, the first vertical wall and the second transverse wall form the first concave body part (6), and the second transverse wall, the second vertical wall and the third transverse wall form the second concave body part (5).

3. The gasket according to claim 1, characterized in that, The second concave body part (5) is located above the first concave body part (6).

4. The gasket according to claim 3, characterized in that, The second concave body part (5) is C-shaped, and the first concave body part (6) is U-shaped.

5. The gasket according to claim 3, characterized in that, A buffer convex part (12) is arranged at the bottom of the first concave body part (6).

6. The gasket according to claim 5, wherein The buffer convex part (12) is an annular protrusion. The annular protrusion extends along the circumferential direction of the first concave body part (6), and the annular protrusion protrudes axially downward from the bottom surface of the first concave body part (6).

7. The gasket according to claim 6, wherein There are two annular protrusions. One annular protrusion is arranged on the inner peripheral side of the bottom surface of the first concave body part (6), and the other annular protrusion is arranged on the outer peripheral side of the bottom surface of the first concave body part (6).

8. The gasket according to claim 6, wherein The cross section of the annular protrusion is triangular, trapezoidal or arc-shaped.

9. A filter element assembly, characterized in that, It includes a filter element body (1), a support frame (2) and the gasket (4) according to any one of claims 1 to 8. The support frame (2) is arranged outside the filter element body (1) and supports the filter element body (1). The support frame (2) includes a support cylinder and an annular side plate (3) arranged on the outer periphery of the support cylinder and extending radially outward. The first concave body part (6) is sleeved outside the annular side plate (3), and the second concave body part (5) is sleeved outside the support cylinder.

10. An air filter, characterized in that, It includes a filter element assembly and a housing. The filter element assembly is installed in the housing, and the filter element assembly is the filter element assembly according to claim 9.

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