Air filter applied to airplane passenger cabin

Abstract

The invention discloses an air filter applied to an airplane passenger cabin. The air filter comprises a filter element and a filter frame assembly, the filter element is arranged on the filter frame assembly, the filter element is a cylinder with a hollow interior and upper and lower openings, at least one rubber line is arranged in the filter element, the rubber line is annularly adhered to the inner surface of the filter element, and at least one annular binding belt is sleeved on the outer surface of the filter element. The filter frame assembly plays a role in supporting and protecting the filter element, the rubber lines can enable bent areas on the inner side of the filter element to be evenly distributed, and therefore it is guaranteed that in the bending process of manufacturing the filter element, adjacent folded corners are not bonded, and the wind receiving area of the filter element is not reduced. The bridle is arranged on the outer surface of the filter element in a sleeving mode after the filter element is shaped, and the service life of the filter element is prolonged. The purpose of limiting the expansion deformation of the filter element is achieved.

Description

Technical Field

[0001] The invention relates to the field of filtering technology, and in particular to an air filter used in an aircraft cabin. Background Art

[0002] The existing cylindrical air filter element is generally formed by bending the inner and outer surfaces in one step. The glue line plays a specific role in this process, which can make the bending area of ​​the filter element evenly distributed, thereby ensuring that adjacent corners will not stick together during the bending process, avoiding reducing the wind receiving area of ​​the filter element.

[0003] However, this traditional manufacturing method has some disadvantages. When the filter paper is bent into a cylindrical filter element, the outer rubber line will be subjected to tension and there is a risk of being broken. In addition, the outer rubber line will produce a certain resistance, which will affect the filtration efficiency of the filter element, making it impossible to achieve the ideal filtration efficiency. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an air filter for aircraft cabins, which eliminates the outer rubber line and improves the process flow. Through the improved process flow, the filter element can still be shaped without the outer rubber line and the bending area of ​​the filter element can be evenly distributed, while saving raw materials.

[0005] According to an embodiment of the present invention, an air filter used in an aircraft cabin includes: a filter element and a filter frame assembly; the filter element is arranged in the filter frame assembly, the filter element is a cylindrical body with a hollow interior and upper and lower openings, at least one rubber line is arranged inside the filter element, the rubber line is annularly adhered to the inner surface of the filter element, and the outer surface of the filter element is covered with at least one annular strap.

[0006] An air filter used in an aircraft cabin according to an embodiment of the present invention has at least the following beneficial effects: the glue line on the inner surface of the filter element can evenly distribute the bent area inside the filter element, thereby ensuring that adjacent corners will not adhere to each other during the bending process of making the filter element, thereby reducing the wind-receiving area of ​​the filter element; the strap is sleeved on the outer surface of the filter element after the filter element is shaped, thereby limiting the expansion and deformation of the filter element.

[0007] According to some embodiments of the present invention, the number of the glue lines is at least two, and the at least two glue lines are evenly spaced apart in the up-and-down direction.

[0008] According to some embodiments of the present invention, the glue line is hot melt glue.

[0009] According to some embodiments of the present invention, the straps are configured as at least two straps, and the at least two straps are evenly spaced apart in the up-and-down direction.

[0010] According to some embodiments of the present invention, the filter frame assembly includes a filter element upper cover and a filter element lower cover; the filter element upper cover is arranged on the upper part of the filter element and has an upper opening; the filter element lower cover is arranged on the lower part of the filter element.

[0011] According to some embodiments of the present invention, the filter element upper cover is in an annular shape, the upper opening is a circular hole, the upper opening is arranged in the middle of the filter element upper cover, and the center of the upper opening coincides with the filter element axis.

[0012] According to some embodiments of the present invention, the filter element upper cover is provided with a first mounting groove, the first mounting groove is annular and matched with the upper part of the filter element, and the upper part of the filter element is mounted in the first mounting groove.

[0013] According to some embodiments of the present invention, the filter element lower cover is disc-shaped, and the filter element lower cover is provided with a second mounting groove, the second mounting groove is annular and matched with the lower part of the filter element, and the lower part of the filter element is installed in the second mounting groove.

[0014] According to some embodiments of the present invention, the filter frame assembly also includes an inner net, which is hollow cylindrical and arranged inside the filter element. The outer surface of the inner net abuts against the inner surface of the filter element. The upper end of the inner net is connected to the upper cover of the filter element, and the lower end of the inner net is connected to the lower cover of the filter element.

[0015] According to some embodiments of the present invention, the filter frame assembly further comprises an outer net which is in the shape of a hollow cylinder and is sleeved on the outside of the filter element. The upper end of the outer net is connected to the upper cover of the filter element, and the lower end of the outer net is connected to the lower cover of the filter element.

[0016] According to some embodiments of the present invention, it also includes: a sealing ring, which is arranged on the upper part of the filter element cover.

[0017] According to some embodiments of the present invention, the present invention further includes: a filter element preparation process, wherein the filter element preparation process includes:

[0018] Step a, folding process: folding the first filter paper with a planar structure to obtain a second filter paper with a pleated shape having a bending portion;

[0019] Step b, gluing process: gluing one side of the second filter paper obtained in step a to form the glue line connecting the bent portion;

[0020] Step c, winding process: winding the second filter paper along the surface where the glue line is located to form a third filter paper connected end to end, and the surface where the glue line is located is located on the inner side of the third filter paper;

[0021] Step d, compression process: compressing the third filter paper by a compression device to shrink the outer diameter of the third filter paper to a set size to form a cylindrical filter paper;

[0022] Step e, tightening process: putting the strap on the outer surface of the filter paper.

[0023] According to some embodiments of the present invention, the surface of the first filter paper is rectangular.

[0024] According to some embodiments of the present invention, the glue line extends along the pleat direction of the second filter paper.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 This is an exploded schematic diagram of an air filter used in an aircraft cabin according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of an air filter used in an aircraft cabin is shown;

[0029] Figure 3 for Figure 1 A schematic diagram of a process for preparing a filter element for an air filter used in an aircraft cabin is shown.

[0030] Reference numerals: filter element 100; rubber line 110; tie band 120; filter paper 130; bending portion 130a; first filter paper 131; second filter paper 132; third filter paper 133; filter element upper cover 200; upper opening 210; filter element lower cover 300; inner net 400; outer net 500; sealing ring 600. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientation, such as left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] refer to Figures 1 to 3 An air filter used in an aircraft cabin according to an embodiment of the present invention comprises a filter element 100 and a filter frame assembly; the filter element 100 is arranged in the filter frame assembly, the filter element 100 is a cylindrical body with a hollow interior and openings at the top and bottom, at least one rubber line 110 is arranged inside the filter element 100, the rubber line 110 is annularly attached to the inner surface of the filter element 100, and at least one annular band 120 is sleeved on the outer surface of the filter element 100. The filter frame assembly supports and protects the filter element 100, the rubber line 110 can make the inner bending area of ​​the filter element 100 evenly distributed, so as to ensure that the adjacent folding corners will not adhere to each other during the bending process of the filter element 100, thereby reducing the wind receiving area of ​​the filter element 100, and the band 120 is sleeved on the outer surface of the filter element 100 after the filter element 100 is finalized, so as to limit the expansion and deformation of the filter element 100.

[0036] Specifically, in some embodiments of the present invention, reference Figure 1 and Figure 3 The filter element 100 is a ring-shaped structure formed by bending the filter paper 130. The filter paper 130 includes a bending portion 130a, and the bending portion 130a is evenly arranged end to end. The setting of the bending portion 130a increases the contact area between the filter element 100 and the air, thereby increasing the filtering efficiency of the filter element 100.

[0037] In certain embodiments, reference Figure 1, there are at least two rubber lines 110, and at least two rubber lines 110 are evenly spaced in the up-down direction. The rubber lines 110 can evenly distribute the inner bending area of ​​the filter element 100, thereby ensuring that the adjacent corners will not stick together during the bending process of the filter element 100 to reduce the wind receiving area of ​​the filter element 100, and the rubber lines 110 evenly spaced make the filter element 100 more stable.

[0038] It is conceivable that, in some embodiments of the present invention, the rubber lines 110 may also be configured as 3, 4 or more, which can be selected according to the size of the target filter element. When the target filter element needs to be larger, the number of rubber lines 110 may be increased accordingly to make the target filter element more firm and stable.

[0039] It is understandable that in some embodiments of the present invention, the at least two glue lines 110 may be unevenly spaced, and the positions of the at least two glue lines 110 only need to ensure that adjacent corners of the filter element 100 do not stick together.

[0040] In certain embodiments, reference Figure 1 The adhesive line 110 is hot melt adhesive. Hot melt adhesive has the characteristics of melting when heated and sticking when cooled, which is convenient for continuous, automated and high-speed operation, improving production efficiency while reducing costs.

[0041] It is conceivable that, in some embodiments of the present invention, the adhesive line 110 is a starch adhesive, an epoxy resin adhesive, a polyurethane adhesive, an organic silicone adhesive or the like, which can also prevent the adjacent corners of the filter element 100 from sticking together.

[0042] In certain embodiments, reference Figure 2 The straps 120 are configured as at least two, and at least two straps 120 are evenly spaced in the vertical direction. The straps 120 can provide an inward tightening constraint force on the filter element 100 to limit the expansion and deformation of the filter element 100. The straps 120 evenly spaced make the filter element 100 more stable.

[0043] It is conceivable that, in some embodiments of the present invention, the straps 120 may also be configured as 3, 4 or more straps, which may be selected according to the size of the target filter element. When the target filter element needs to be larger, the number of straps 120 may be increased accordingly to make the target filter element more secure and stable.

[0044] It is understandable that in some embodiments of the present invention, the at least two straps 120 may be unevenly spaced, and the positions of the at least two straps 120 only need to ensure that the filter element 100 does not expand or deform.

[0045] In certain embodiments, reference Figure 1 and Figure 2The filter frame assembly includes a filter element upper cover 200 and a filter element lower cover 300; the filter element upper cover 200 is arranged on the upper part of the filter element 100 and the filter element upper cover 200 has an upper opening 210; the filter element lower cover 300 is arranged on the lower part of the filter element 100. The filter element upper cover 200 and the filter element lower cover 300 restrict and fix the filter element 100 in the middle, play a role in shaping and fixing, and seal the gaps at the upper and lower ends of the filter element 100 to prevent air from flowing out without being filtered. The upper opening 210 of the filter element upper cover 200 connects the inside of the filter element 100 with the third-party equipment. Because the filter element lower cover 300 is sealed at the bottom of the filter element 100, the air first enters the inside of the filter element 100 from the periphery of the filter element 100 to obtain filtered air, and then flows out to the third-party equipment through the upper opening 210 of the filter element upper cover 200.

[0046] Specifically, in some embodiments of the present invention, the upper opening 210 of the filter element upper cover 200 is a circular hole, and the diameter of the upper opening 210 is smaller than the diameter of the middle opening of the filter element 100, ensuring that all the air flowing out of the upper opening 210 comes from the inside of the filter element 100.

[0047] It is conceivable that, in some embodiments of the present invention, the upper opening 210 of the filter element upper cover 200 is a hole in various forms such as a rectangular hole and a diamond hole, as long as the maximum structural dimension of the upper opening 210 is smaller than the diameter of the middle opening of the filter element 100.

[0048] In certain embodiments, reference Figure 1 and Figure 2 The filter element upper cover 200 is annular, and the upper opening 210 is a circular hole. The upper opening 210 is located in the middle of the filter element upper cover 200, and the center of the upper opening 210 coincides with the axis of the filter element 100. The annular filter element upper cover 200 matches the contour of the filter element 100, which can seal the upper gap of the filter element 100 to the greatest extent while saving the raw materials for making the filter element upper cover 200. The circular hole-shaped upper opening 210 allows the filtered air inside the filter element 100 to flow into the third-party equipment more smoothly.

[0049] It is conceivable that, in some embodiments of the present invention, the center of the upper opening 210 may not coincide with the axis of the filter element 100, and the air inside the filter element 100 may also flow out to a third-party device.

[0050] In certain embodiments, reference Figure 1 and Figure 2 The filter element upper cover 200 is provided with a first mounting groove, which is annular and matches the upper part of the filter element 100. The upper part of the filter element 100 is mounted in the first mounting groove. The setting of the first mounting groove can better fix the filter element 100 and seal the gap of the filter element 100 to a greater extent to prevent unfiltered air from flowing out.

[0051] Specifically, in some embodiments of the present invention, the first mounting groove is arranged on the edge of the filter element upper cover 200, and the center of the first mounting groove coincides with the center of the filter element upper cover 200. The circular ring size of the first mounting groove is larger than the circular ring size of the upper part of the filter element 100, and cooperates with the circular ring gap of the upper part of the filter element 100, so as to obtain a better sealing effect and save the raw materials of the filter element upper cover 200. When the size of the filter element 100 is constant, the space occupied by the filter element upper cover 200 is saved.

[0052] It is conceivable that, in some embodiments of the present invention, the first installation groove may not be provided on the edge of the filter element upper cover 200 , and may also be eccentrically provided, so as to achieve the purpose of installing and fixing the sealing filter element 100 .

[0053] In certain embodiments, reference Figure 1 and Figure 2 The filter element lower cover 300 is disc-shaped, and is provided with a second mounting groove. The second mounting groove is annular and matches the lower part of the filter element 100. The lower part of the filter element 100 is mounted in the second mounting groove. The disc-shaped filter element lower cover 300 seals the lower end gap of the filter element 100 and the lower opening of the filter element 100, restricting the air to flow out only from the upper end of the filter element 100. The second mounting groove can better fix the filter element 100 and seal the gap of the filter element 100 to a greater extent to prevent unfiltered air from flowing out.

[0054] Specifically, in some embodiments of the present invention, the second mounting groove is arranged on the edge of the filter element lower cover 300, and the center of the second mounting groove coincides with the center of the filter element lower cover 300, the circular ring size of the second mounting groove is larger than the circular ring size of the lower part of the filter element 100, and cooperates with the circular ring gap of the lower part of the filter element 100, so as to obtain a better sealing effect and save the raw materials of the filter element lower cover 300. When the size of the filter element 100 is constant, the space occupied by the filter element lower cover 300 is saved.

[0055] It is conceivable that, in some embodiments of the present invention, the second installation groove may not be disposed on the edge of the filter element lower cover 300 , and may also be disposed eccentrically, thereby achieving the purpose of installing and fixing the sealed filter element 100 .

[0056] It is understandable that in some embodiments of the present invention, the filter element lower cover 300 may also be provided with a lower opening, and the lower opening of the filter element lower cover 300 is connected to a third-party device, so that the air entering the filter element 100 can flow out to the third-party device through the upper opening 210 and the lower opening at the same time.

[0057] In certain embodiments, reference Figure 1The filter frame assembly further includes an inner net 400, which is in a hollow cylindrical shape and is disposed inside the filter element 100. The outer surface of the inner net 400 abuts against the inner surface of the filter element 100. The upper end of the inner net 400 is connected to the filter element upper cover 200, and the lower end of the inner net 400 is connected to the filter element lower cover 300. The inner net 400 serves to support the filter element 100 and increase the installation bearing capacity of the filter element 100.

[0058] Specifically, in some embodiments of the present invention, the holes hollowed out on the surface of the inner net 400 are square holes, and the upper and lower ends of the inner net 400 are circular rings without holes, thereby ensuring the strength of the contact between the inner net 400 and the filter element upper cover 200 and the filter element lower cover 300.

[0059] It is conceivable that, in some embodiments of the present invention, the holes hollowed out on the surface of the inner net 400 may also be holes of other shapes such as circular holes and triangular holes.

[0060] In certain embodiments, reference Figure 1 and Figure 2 The filter frame assembly further includes an outer net 500, which is in a hollow cylindrical shape and is sleeved outside the filter element 100. The upper end of the outer net 500 is connected to the filter element upper cover 200, and the lower end of the outer net 500 is connected to the filter element lower cover 300. The outer net 500 protects the filter element 100 and increases the strength of the entire device.

[0061] Specifically, in some embodiments of the present invention, the holes hollowed out on the surface of the outer net 500 are square holes, and the upper and lower ends of the outer net 500 are circular rings without holes, so as to ensure the strength of the contact between the outer net 500 and the filter element upper cover 200 and the filter element lower cover 300.

[0062] It is conceivable that, in some embodiments of the present invention, the holes hollowed out on the surface of the outer net 500 may also be holes of other shapes such as circular holes and triangular holes.

[0063] In certain embodiments, reference Figure 1 and Figure 2 , further comprising a sealing ring 600, which is disposed on the upper part of the filter element upper cover 200. The sealing ring 600 plays a sealing role when the filter element upper cover 200 is connected to a third-party device.

[0064] Specifically, the sealing ring 600 is arranged in a circular ring shape on the edge of the filter element upper cover 200, and the size of the central circular hole of the sealing ring 600 is larger than the maximum structural size of the upper opening 210 of the filter element upper cover 200.

[0065] In certain embodiments, reference Figure 3, and also includes a filter element preparation process, which includes: step a folding process: folding the first filter paper 131 of the plane structure to obtain a pleated second filter paper 132 with a bending portion 130a; step b gluing process: gluing one side of the second filter paper 132 obtained in step a to form a glue line 110 connecting the bending portion 130a; step c winding process: winding the second filter paper 132 along the surface where the glue line 110 is located to form a third filter paper 133 connected end to end, and the surface where the glue line 110 is located is located on the inner side of the third filter paper 133; step d compression process: compressing the third filter paper 133 by a compression device to shrink the outer diameter of the third filter paper 133 to a set size to form a cylindrical filter paper 130; step e tightening process: sleeve the strap 120 on the outer surface of the filter paper 130. The filter element 100 can be obtained through the above steps.

[0066] Specifically, in some embodiments of the present invention, in the folding process of step a, a filter paper folding machine is used to fold the first filter paper 131 with a planar structure into a second filter paper 132 with a bending portion 130a. The filter paper folding machine includes a transmission supply device, a folding device and a transmission delivery device. The folding device includes a folding plate, a guide plate and a positioning device. The first filter paper 131 enters the folding device through the transmission supply device. The folding plate and the guide plate guide the first filter paper 131 to be folded by reciprocating up and down movements in sequence, and finally the second filter paper 132 is output through the transmission delivery device.

[0067] It is conceivable that, in some embodiments of the present invention, in the folding process of step a, the first filter paper 131 may be folded by hand or by a combination of hand and mechanical folding.

[0068] Specifically, in some embodiments of the present invention, in step b, the gluing process, the gluing equipment is arranged at the outlet of the folding device of the filter paper folding machine, and the gluing is performed synchronously while the second filter paper 132 is generated.

[0069] It is conceivable that in some embodiments of the present invention, in the gluing process of step b, a gluing device is separately provided, and after the filter paper folding machine outputs the second filter paper 132, the second filter paper 132 is placed in the gluing device for gluing.

[0070] Specifically, in some embodiments of the present invention, in the winding process of step c, a winding device is used to wind the second filter paper 132 into a third filter paper 133 connected end to end. The winding device includes two clamping parts, a gluing component and a pressing component. The two clamping parts respectively clamp the two ends of the second filter paper 132, and the gluing component glues the end faces of the two ends of the second filter paper 132. Finally, the pressing component presses and bonds the two ends of the second filter paper 132 to obtain the third filter paper 133. At this time, the third filter paper 133 is still in a naturally loose state, and the spacing between adjacent bending portions 130a is large enough, so the adjacent bending portions 130a will not stick together.

[0071] It is conceivable that, in some embodiments of the present invention, in the winding process of step c, the third filter paper 133 is generated by manual cooperation with a gluing and pressing device, and the gluing and pressing device includes a gluing component, a U-shaped support base and a pressing component. The second filter paper 132 is manually bent and inserted into the opening of the U-shaped support base. The two ends of the second filter paper 132 are at the upper part of the U-shaped support base, and the other parts of the second filter paper 132 are at the lower part of the U-shaped support base. The gluing component evenly glues the two ends of the second filter paper 132, and finally the pressing component presses and bonds the two ends of the second filter paper 132 to form a third filter paper 133 connected end to end.

[0072] Specifically, in some embodiments of the present invention, in the compression process of step d, a compression device is used to shrink the third filter paper 133 into a cylindrical filter paper 130 of a set size. The compression device includes two embracing arms, each of which includes two embracing small arms. The embracing small arms can be movably arranged at both ends of the embracing arms. The size of the area surrounded by the two embracing large arms can be linearly adjusted by adjusting the extension amount and extension angle of the embracing small arms. The third filter paper 133 is placed between the two embracing large arms, and the distance between the two embracing large arms will shrink, thereby driving the third filter paper 13 3 shrinks, and adjusts the extension amount and angle of the embracing small arm in real time to adapt to the third filter paper 133 with reduced size, and finally achieves the purpose of uniformly shrinking the third filter paper 133 to form the filter paper 130. Since there is a glue line 110 on the inner surface of the third filter paper 133, no adhesion will occur when the spacing between the bending parts 130a inside the third filter paper 133 becomes smaller. In addition, the third filter paper 133 is uniformly compressed and tightened into a cylindrical filter paper 130 by the compression device, and the distance between the adjacent bending parts 130a on the outer surface of the third filter paper 133 changes synchronously and uniformly, and no adhesion will occur either.

[0073] It can be imagined that in some embodiments of the present invention, in the compression process of step d, the compression equipment used includes two upper and lower shrinkage cone barrels that are relatively arranged, the interior of the shrinkage cone barrels is hollow and the internal hollow cavity is conical, the hollow cavity inside the upper shrinkage cone barrel is small at the top and large at the bottom, and the hollow cavity inside the lower shrinkage cone barrel is large at the top and small at the bottom, the third filter paper 133 is vertically placed between the upper and lower shrinkage cone barrels, and the two shrinkage cone barrels are close to each other, forcing the third filter paper 133 to shrink, and finally obtaining a cylindrical filter paper 130.

[0074] Specifically, in some embodiments of the present invention, in the tightening process of step e, after the annular band 120 is sleeved on the outer surface of the filter paper 130 in step d, the filter paper 130 is separated from the compression device to obtain the filter element 100.

[0075] In some embodiments, the surface of the first filter paper 131 is rectangular. The rectangular first filter paper 131 is obtained through a filter element preparation process to obtain a filter element 100.

[0076] In certain embodiments, reference Figure 3 The glue line 110 extends along the fold direction of the second filter paper 132. The glue line 110 connects adjacent bent portions 130a to prevent the bent portions 130a from sticking to each other.

[0077] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An air filter used in an aircraft cabin, characterized in that: include: A filter element (100) and a filter frame assembly; The filter element (100) is arranged in the filter frame assembly, and the filter element (100) is a cylindrical shape with a hollow interior and openings at the top and bottom. At least one rubber line (110) is arranged inside the filter element (100), and the rubber line (110) is annularly adhered to the inner surface of the filter element (100), and the outer surface of the filter element (100) is sleeved with at least one annular strap (120).

2. The air filter used in an aircraft cabin according to claim 1, characterized in that: The number of the glue lines (110) is at least two, and the at least two glue lines (110) are evenly spaced apart in the up-down direction.

3. The air filter used in an aircraft cabin according to claim 1, characterized in that: The straps (120) are configured as at least two straps, and the at least two straps (120) are evenly spaced apart in the up-down direction.

4. The air filter used in an aircraft cabin according to claim 1, characterized in that: The filter frame assembly comprises a filter element upper cover (200) and a filter element lower cover (300); The filter element upper cover (200) is arranged on the upper part of the filter element (100) and the filter element upper cover (200) has an upper opening (210); The filter element lower cover (300) is arranged at the lower part of the filter element (100).

5. The air filter used in an aircraft cabin according to claim 4, characterized in that: The filter frame assembly further comprises an inner net (400), which is in the shape of a hollow cylinder and is arranged inside the filter element (100). The outer surface of the inner net (400) abuts against the inner surface of the filter element (100). The upper end of the inner net (400) is connected to the filter element upper cover (200), and the lower end of the inner net (400) is connected to the filter element lower cover (300).

6. The air filter used in an aircraft cabin according to claim 4, characterized in that: The filter frame assembly further comprises an outer net (500), which is in the shape of a hollow cylinder and is sleeved on the outside of the filter element (100). The upper end of the outer net (500) is connected to the filter element upper cover (200), and the lower end of the outer net (500) is connected to the filter element lower cover (300).

7. The air filter used in an aircraft cabin according to claim 4, characterized in that: Also includes: The sealing ring (600) is arranged on the upper part of the filter element upper cover (200).

8. The air filter used in an aircraft cabin according to claim 1, characterized in that: Also includes: A filter element preparation process, the filter element preparation process comprising: Step a, folding process: folding the first filter paper (131) with a planar structure to obtain a second filter paper (132) with a pleated shape and a bending portion (130a); Step b, gluing process: gluing one side of the second filter paper (132) obtained in step a to form the glue line (110) connecting the bent portion (130a); Step c, winding process: winding the second filter paper (132) along the surface where the glue line (110) is located to form a third filter paper (133) connected end to end, and the surface where the glue line (110) is located is located on the inner side of the third filter paper (133); Step d, compression process: compressing the third filter paper (133) by a compression device, so that the outer diameter of the third filter paper (133) is shrunk to a set size to form a cylindrical filter paper (130); Step e, tightening process: sleeve the strap (120) onto the outer surface of the filter paper (130).

9. An air filter for use in an aircraft cabin according to claim 8, characterized in that: The surface of the first filter paper (131) is rectangular.

10. The air filter used in an aircraft cabin according to claim 8, characterized in that: The glue line (110) extends along the fold direction of the second filter paper (132).

Images