Self-suction filtering type particulate matter preventing respirator and filtering element thereof

Abstract

The utility model relates to a self-suction filtering type particulate matter preventing respirator and a filtering element thereof. A filtering layer of the filtering element is a folding type filtering layer. The filter layer is positioned between the inner support part and the outer support part; the edge of the outer supporting part is provided with outer pressing feet which extend into the concave valleys of the filtering layer in a matched mode, and an outer concave part which is matched with the convex peaks of the filtering layer in a matched mode is arranged between every two adjacent outer pressing feet; the edge of the inner supporting part is provided with inner pressing feet which extend into the concave valley, facing the inner supporting part, of the filtering layer in a matched mode, and an inner concave part which is matched with the convex peak, facing the outer supporting part, of the filtering layer in a matched mode is arranged between every two adjacent inner pressing feet; the filter layer is a folding filter layer, the cross section of the filter layer is corrugated, the filter layer is provided with convex peaks and concave valleys, and compared with a planar filter layer in the prior art, under the condition that the size is equivalent, the contact area between the filter layer and air is large, the filter area is large, the ventilation area is also large, a larger amount of air can be inhaled, the inhalation resistance is small, and sufficient fresh air can be provided for a wearer; the human health is guaranteed.

Description

Technical Field

[0001] The utility model relates to a respirator, in the technical field of filter covers, and particularly relates to a self-priming particulate respirator, belonging to the field of air purification. The utility model also relates to a filter element of the self-priming particulate respirator. Background Art

[0002] At present, self-priming particulate respirators are often equipped at work positions with more dust. Usually, a self-priming particulate respirator is worn on the mouth and nose of a person by straps, and a filter element is connected to its breathing port to filter air and prevent dusty air from being inhaled by people. Since a lot of dust will accumulate in the filter element, it is generally detachable to facilitate people to disassemble and replace or clean it.

[0003] There is a prior self-priming particulate respirator, which has a face mask for staying at the mouth and nose. A filter element is connected to the face mask. The filter element has a housing, a filter layer is partitioned in the housing, ventilation holes are arranged on one side of the filter layer on the housing, and a clamping port is opened on the other side of the filter layer on the housing. This is a general industry interface. Correspondingly, a matching structure is arranged on the face mask, and the two are clamped to assemble the filter element and the face mask together and realize the communication between the inside of the face mask and the filter element.

[0004] However, the filter layer of the current filter element is a planar structure, with a small filtering area and a large inhalation resistance, which makes people unable to breathe sufficient fresh air, resulting in a feeling of stuffiness and being unfavorable to human health. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a self-priming particulate respirator to solve the problems in the prior art that due to the planar structure of the filter layer of the filter element, the filtering area is small and the inhalation resistance is large, people cannot breathe sufficient fresh air, resulting in a feeling of stuffiness and being unfavorable to human health. The purpose of the utility model is also to provide a filter element of the self-priming particulate respirator.

[0006] To solve the above problems, the filter element of the self-priming particulate respirator involved in the utility model adopts the following technical solution: A filter element of a self-priming particulate respirator, having a clamping port for communicating and assembling with the face mask of the respirator, includes:

[0007] A filter layer, the filter layer is a folded filter layer, with a corrugated cross-section, having convex peaks and concave valleys;

[0008] An outer bracket, the outer bracket has an outer support part, and air channels are arranged on the outer support part;

[0009] Inner stent, the inner stent has an inner support part;

[0010] The filter layer is located between the inner support part and the outer support part;

[0011] At the edge of the outer support part, there are outer pressing feet that fit into the valleys of the filter layer facing the outer support part, and there are outer concave parts that fit and cooperate with the convex peaks of the filter layer facing the outer support part between two adjacent outer pressing feet;

[0012] At the edge of the inner support part, there are inner pressing feet that fit into the valleys of the filter layer facing the inner support part, and there are inner concave parts that fit and cooperate with the convex peaks of the filter layer facing the inner support part between two adjacent inner pressing feet;

[0013] Each outer pressing foot cooperates and fixes with the corresponding inner concave part, and each inner pressing foot cooperates and fixes with the corresponding outer concave part to seal and press the edge of the filter layer;

[0014] The clamping opening is opened on the inner support part, and the clamping opening is communicated with the outside through the filter layer and the air channel;

[0015] Each outer pressing foot and the corresponding inner concave part are fixed by pressure welding, and each inner pressing foot and the corresponding outer concave part are fixed by pressure welding.

[0016] There are gaps between the outer support part, the inner support part and the filter layer.

[0017] Both the outer support part and the inner support part are circular. The two pressing feet at the diameter of the outer support part perpendicular to the extending direction of the convex peaks of the filter layer are edge pressing feet, and the free ends of the edge pressing feet have mating planes.

[0018] The outer support part has straight edges that are parallel to each other. The straight edges are parallel to the extending direction of the convex peaks of the filter layer. There are arc edges between the two ends of the two straight edges. The inner support part is circular. The two pressing feet at the straight edges of the outer support part are edge pressing feet. The edge pressing feet are flat, and the free ends of the edge pressing feet have mating planes.

[0019] Waist-shaped holes for ventilation are opened on the edge pressing feet.

[0020] Both the outer support part and the inner support part are rectangular.

[0021] The pressing feet on the two sides of the outer support part parallel to the extending direction of the convex peaks of the filter layer are large pressing feet, and the free ends of the large pressing feet have mating planes.

[0022] Air channels for ventilation are opened on the large pressing feet.

[0023] The self-priming filtering anti-particle respirator involved in the present utility model adopts the following technical solutions:

[0024] A self-priming filtering particulate respirator includes a face mask, and a filtering element is communicatively disposed on the face mask. A clamping port is provided on the filtering element, and the filtering element is assembled with the face mask through the clamping port to achieve gas communication. The filtering element is the aforementioned filtering element.

[0025] The filter layer of the filter element of the self-priming filtering particulate respirator of the present utility model is a folded filter layer, and its cross-section is corrugated, having convex peaks and concave valleys. Compared with the flat filter layer in the prior art, when the volume of the filter element is equivalent, the contact area between the filter layer and air is large, the filtration area is large, and the ventilation area is also large. It can inhale a larger amount of air, with a small inhalation resistance, and can provide sufficient fresh air for the wearer to ensure human health. In addition, the larger area of the filter layer also increases the dust carrying capacity and extends the service life of the product.

[0026] Each outer pressing foot and the corresponding inner concave part of the present utility model are fixed by pressure welding, and each inner pressing foot and the corresponding outer concave part are fixed by pressure welding, with reliable and convenient fixation.

[0027] There are gaps between the outer support part, the inner support part and the filter layer of the present utility model. The existence of the gaps forms a certain cavity structure, which can increase the contact area of the air flow penetrating the filter layer and enhance the ventilation effect.

[0028] A waist hole for ventilation is provided on the edge pressing foot of the present utility model, which serves as an air flow inlet channel at the corresponding position of the inclined surface structure of the filter layer, improving the utilization rate of the filter layer. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments:

[0030] Figure 1 It is a three-dimensional structure schematic diagram of a specific embodiment 1 of the self-priming filtering particulate respirator of the present utility model in one direction;

[0031] Figure 2 It is a three-dimensional structure schematic diagram of a specific embodiment 1 of the self-priming filtering particulate respirator of the present utility model in another direction;

[0032] Figure 3 It is a structure schematic diagram of a specific embodiment 1 of the filter element of the self-priming filtering particulate respirator of the present utility model;

[0033] Figure 4 For Figure 3 the A-A cross-sectional view of

[0034] Figure 5Schematic diagram of the three-dimensional structure of the specific embodiment 1 of the filter element of the self-priming filtering particulate respirator of the present utility model;

[0035] Figure 6 Schematic diagram of the structure of the outer bracket in 3;

[0036] Figure 7 For Figure 6 B-B cross-sectional view of;

[0037] Figure 8 Schematic diagram of the three-dimensional structure of the outer bracket in 3;

[0038] Figure 9 For Figure 3 Schematic diagram of the three-dimensional structure of the inner bracket in one direction in;

[0039] Figure 10 For Figure 3 Schematic diagram of the three-dimensional structure of the inner bracket in another direction in;

[0040] Figure 11 Schematic diagram of the structure of the specific embodiment 2 of the filter element of the self-priming filtering particulate respirator of the present utility model;

[0041] Figure 12 For Figure 11 C-C cross-sectional view of;

[0042] Figure 13 Schematic diagram of the three-dimensional structure of the specific embodiment 2 of the filter element of the self-priming filtering particulate respirator of the present utility model. Detailed implementation manners

[0043] In order to make the technical objectives, technical solutions and beneficial effects of the present utility model clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Generally, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Specific embodiment 1 of the self-priming filtering particulate respirator involved in the present utility model, in Figure 1 And Figure 2 In, in combination with Figures 3 - 10The mask 1 is an existing mask, which is used to be worn at the mouth and nose. A filter element 2 is connected and arranged on both sides of the mask. The filter element 2 has an inner bracket 3 and an outer bracket 4. A filter layer 5 is arranged between the inner bracket 3 and the outer bracket 4. The filter layer 5 here is a folded filter layer, and its cross section is corrugated, which can also be said to be in the shape of a sine wave, with convex peaks 6 and concave valleys 7, a concave valley 7 between two convex peaks 6, and a convex peak 6 between two concave valleys 7. In addition, the position of the convex peak on one side is a concave valley on the other side. The outer bracket 4 has an outer support portion 8, and the outer support portion 8 has two straight edges 22, and there is an arc edge between the two ends of the two straight edges 22. It can also be said that the outer support portion is a circle with two parts cut off by a plane on both sides. The outer support portion 8 is provided with a hollow air duct 9, and the inner bracket 3 has an inner support portion 10, and the inner support portion 10 is circular. The filter layer 5 is located between the outer support portion 8 and the inner support portion 10, and the straight edge of the outer support portion 8 is parallel to the extension direction of the convex peak of the filter layer 5. In addition, there is a gap between the outer support portion 8 and the inner support portion 10 and the filter layer 5. An outer clamping foot 11 is arranged on the edge of the outer support portion 8, which fits into the valley of the filter layer toward the outer support portion 8. An outer recess 12 is formed between two adjacent outer clamping feet 11. The outer recess 12 is used to accommodate the convex peak of the filter layer 5 toward the outer support portion 8. Similarly, an inner clamping foot 14 is arranged on the edge of the inner support portion 13, which fits into the valley of the filter layer 5 toward the inner support portion 13. An inner recess 15 is formed between two adjacent inner clamping feet 14. The inner recess 15 is used to accommodate the convex peak of the filter layer 5 toward the inner support portion 1 3, because the position of the convex peak on one side of the filter layer is a valley on the other side, then the position corresponding to each external clamping foot is an inner concave part, and the position corresponding to each outer concave part is an inner clamping foot. Therefore, each external clamping foot 11 is fixed with the corresponding inner concave part 15, and each internal clamping foot 14 is fixed with the corresponding outer concave part 12, so that the edge of the filter layer can be sealed and compressed; and each external clamping foot 11 is fixed with the corresponding inner concave part 15 by pressure welding, and each internal clamping foot 14 is fixed with the corresponding outer concave part 12 by pressure welding. In this way, the filter layer 5 and the inner bracket 3 form a space that cannot be directly connected to the outside world, and the space between the filter layer and the outer bracket is connected to the outside world through the hollow air channel 9.

[0045] Since the outer support portion 8 has an arc edge and a straight edge, a relatively large area of the portion of the filter layer 5 at the straight edge of the outer support portion 8 is a part of a convex peak or a concave valley. The so-called extending direction of the convex peak of the filter layer 5 is described with respect to the cross-section. Since the filter layer is foldable, a convex peak extends from one end to the other end, and each convex peak is parallel. Its extending direction is the direction from one end of the filter layer to the other end. When the filter layer is cut into a shape that fits the outer support portion, the extending direction of the wave peak is retained. Since a relatively large area of the portion of the filter layer 5 at the straight edge of the outer support portion 8 is a part of a convex peak or a concave valley, the area of the corresponding outer pressing foot or outer concave portion is large. If it corresponds to an outer concave portion, then for the inner support, an inner pressing foot needs to be provided, and no holes can be provided on the inner pressing foot. Then, the corresponding part of the filter layer cannot contact the air to be filtered to the maximum extent, resulting in waste. Therefore, at this corresponding position, the outer support portion 8 is provided with an outer pressing foot, that is, at this corresponding position, the part of the filter layer facing the outer support portion 8 is a concave valley. The outer pressing foot here is the edge pressing foot 16. The edge pressing foot 16 is planar, and waist holes 13 are provided on the edge pressing foot, and they are double waist holes, that is, two waist holes. The free end of the edge pressing foot 16 has a mating plane 17. Of course, the bottom wall of the corresponding inner concave portion also has a plane that mates with the mating plane. The edge of this mating plane coincides with the circular edge of the inner support portion. An ultrasonic welding bead 21 is provided on the inner concave portion corresponding to the mating plane 17 for ultrasonically welding the pressing foot to the support portion. This belongs to a process issue and can improve the production process feasibility of the product.

[0046] A mounting opening 19 is provided on the inner support portion 10. The mounting opening 19 communicates with the outside through the filter layer 5 and the air-permeable channel 9. The mounting opening 19 is used to communicate and assemble with the mask of the respirator. This mounting opening 19 is a general industry interface. Correspondingly, a mating structure is provided on the mask. The two are mounted together to assemble the filter element with the mask and realize the communication between the inside of the mask and the filter element. Through this mounting opening, the filter element is mounted with the mating structure on the mask, and moreover, through the mounting opening, the space between the filter layer and the inner support is communicated with the inside of the mask. The structures for mounting and communicating on the filter element and the mask are the same as those in the prior art and have not been improved.

[0047] Specific embodiment 1 of the filter element of the self-priming filter type particulate respirator involved in the present invention, in Figures 3 - 10 In, in combination with Figure 1 and Figure 2 This embodiment, the filter element in this embodiment is the filter element in the specific embodiment 1 of the above-mentioned self-priming filter type particulate respirator, and will not be repeated here.

[0048] The inner support part and the outer support part in the above embodiments are in a shape with two straight sides and two arc-shaped sides. In other embodiments, they can also be directly set to be circular. Correspondingly, the outer pressing feet cannot be flat and need to be arc-shaped, and the outer pressing feet are located at the diameter of the outer support part perpendicular to the extending direction of the convex peaks of the filter layer. The rest of the structure is the same as that in the above embodiments.

[0049] Specific Embodiment 2 of the self-priming filtering anti-particle respirator involved in the present utility model, in Figures 11 - 13 in, refer to Figures 1 - 10, its face mask is an existing face mask, which is used to be worn over the mouth and nose. Filter elements 2 are communicatively provided on both sides of the face mask. The difference between the filter element in this embodiment and the filter element in the specific embodiment 1 of the above self-priming filter type particulate respirator lies in that: the outer support part 8 of its outer bracket 4 and the inner support part 10 of its inner bracket 3 are both square, and the filter layer 5 is also square. Moreover, the filter layer 5 is perfectly square, that is to say, the cutting surface is either perpendicular to the convex peak extension direction of the filter layer or parallel to the convex peak extension direction of the filter layer. Similarly, the filter element 2 has an inner bracket 3 and an outer bracket 4, and a filter layer 5 is provided between the inner bracket 3 and the outer bracket 4. Here, the filter layer 5 is a folded filter layer, and its cross-section is corrugated, that is to say, it looks like a sine wave, having convex peaks 6 and concave valleys 7. There is one concave valley 7 between two convex peaks 6, and there is one convex peak 6 between two concave valleys 7. Moreover, the position with a convex peak on one side is a concave valley on the other side. The outer bracket 4 has an outer support part 8, and the outer support part 8 is in the shape of a square plate, on which air channels 9 are arranged. The inner bracket 3 has an inner support part 10, and the inner support part 10 is also in the shape of a square plate. The filter layer 5 is located between the outer support part 8 and the inner support part 10, and there are gaps between the outer support part 8 and the inner support part 10 and the filter layer 5. Outer pressing feet 11 are arranged on the edge of the outer support part 8 and fit into the concave valleys of the filter layer facing the outer support part 8. The space between two adjacent outer pressing feet 11 is an outer concave part 12, and the outer concave part 12 is used to accommodate the convex peaks of the filter layer 5 facing the outer support part 8. Similarly, inner pressing feet 14 are arranged on the edge of the inner support part 13 and fit into the concave valleys of the filter layer facing the inner support part 13. The space between two adjacent inner pressing feet 14 is an inner concave part 15, and the inner concave part 15 is used to accommodate the convex peaks of the filter layer 5 facing the inner support part 13. Since the position with a convex peak on one side of the filter layer is a concave valley on the other side, the position corresponding to each outer pressing foot is an inner concave part, and the position corresponding to each outer concave part is an inner pressing foot. Therefore, each outer pressing foot 11 cooperates with the corresponding inner concave part 15 for fixation, and each inner pressing foot 14 cooperates with the corresponding outer concave part 12 for fixation to seal and press the edge of the filter layer; moreover, each outer pressing foot 11 and the corresponding inner concave part 15 are fixed by spot welding, and each inner pressing foot 14 and the corresponding outer concave part 12 are fixed by spot welding. In this way, a space that cannot be directly communicated with the outside is formed between the filter layer 5 and the inner bracket 3, and the space between the filter layer and the outer bracket communicates with the outside through the air channels 9.

[0050] Since the outer support part 8 is square, at the corresponding positions of the two side edges of the outer support part 8, the filter layer 5 is either a convex peak part or a concave valley part. The so-called extending direction of the convex peaks of the filter layer 5 is with respect to the cross-section. Since the filter layer is foldable, a convex peak extends from one end to the other end, and each convex peak is parallel, and its extending direction is from one end of the filter layer to the other end. Since at the corresponding positions of the two side edges of the outer support part 8, the filter layer 5 is either a convex peak part or a concave valley part, then the area of the corresponding outer pressing foot or concave part is larger. If it corresponds to an outer concave part, then for the inner support, an inner pressing foot needs to be provided, and no holes can be provided on the inner pressing foot, so the corresponding part of the filter layer cannot contact the air to be filtered to the maximum extent, resulting in waste. Therefore, corresponding to this part, the outer support part 8 is provided with outer pressing feet, and only one outer pressing foot is provided on each of the two side edges of the outer support part 8. Because there is only a concave valley here, that is, corresponding to this part, the part of the filter layer 5 facing the outer support part 8 is a concave valley. The outer pressing foot here is the large pressing foot 18, and an air passage 20 for ventilation is also provided on the large pressing foot 18. The free end of the large pressing foot 18 has a mating plane, and the mating plane mates with the corresponding inner concave part. Although there is only one outer pressing foot at the two side edges of the outer support frame, this outer pressing foot and the adjacent outer pressing feet are on different side edges, but this support foot is also adjacent to the outermost support foot on the adjacent side, and there is also an outer concave part between this large pressing foot and the two adjacent outer pressing feet. By the same token, the two side edges of the inner support part are entirely an inner concave part.

[0051] A clamping opening (not shown in the figure) is provided on the inner support part 10. The clamping opening is communicated with the outside through the filter layer 5 and the air-permeable airway 9. The clamping opening is used to communicate and assemble with the mask of the respirator. The clamping opening is a prior art, and its structure is the same as that of the prior art. Through this clamping opening, the filter element is clamped with the corresponding structure on the mask, and through the clamping opening, the space between the filter layer and the inner support is communicated with the inside of the mask. Here, the structures of the filter element and the mask for assembly and communication are the same as those of the prior art and have not been improved.

[0052] Specific embodiment 2 of the filter element of the self-priming filter type particulate respirator involved in the present invention, in Figures 1 - 3 In this case, the filter element in this embodiment is the filter element in the specific embodiment 2 of the above-mentioned self-priming filter type particulate respirator, and will not be repeated here.

[0053] The outer pressing feet and the corresponding inner concave parts in the above embodiments are fixed by spot welding, and the inner pressing feet and the corresponding outer concave parts are fixed by spot welding. In other embodiments, they can also be fixed by clamping or using a clamp to press and fix.

[0054] There are gaps between the outer support part, the inner support part and the filter layer in the above-mentioned embodiments, which can better form a space. In other embodiments, the gaps may not be provided.

[0055] There is a positioning cone and a positioning hole structure between the mating plane and the corresponding concave part in the above-mentioned embodiments. In other embodiments, they may not be provided.

[0056] There are kidney-shaped holes for ventilation on the edge pressing feet in the above-mentioned embodiments. In other embodiments, they may not be provided or only one kidney-shaped hole may be provided.

[0057] There are air channels for ventilation on the large pressing feet in the above-mentioned embodiments. In other embodiments, they may not be provided.

[0058] Both the outer support part and the inner support part in the above-mentioned embodiments are flat. In other embodiments, they may be set to a curved surface.

[0059] Finally, it should be noted that the above-mentioned embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Any equivalent replacement of the present invention and any modification or partial replacement without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A filtering element of a self-priming filtering particulate respirator, having a snap-in port for communicating and assembling with a face mask of the respirator, characterized in that, Comprising: A filter layer, which is a folded filter layer with a corrugated cross-section, having convex peaks and concave valleys; An outer bracket, which has an outer support portion with air channels disposed thereon; An inner bracket, which has an inner support portion; The filter layer is located between the inner support portion and the outer support portion; At the edge of the outer support portion, there are outer pressing feet that fit and extend into the concave valleys of the filter layer facing the outer support portion, and there are outer concave portions between adjacent two outer pressing feet that fit and cooperate with the convex peaks of the filter layer facing the outer support portion; At the edge of the inner support portion, there are inner pressing feet that fit and extend into the concave valleys of the filter layer facing the inner support portion, and there are inner concave portions between adjacent two inner pressing feet that fit and cooperate with the convex peaks of the filter layer facing the inner support portion; Each outer pressing foot cooperates and fixes with the corresponding inner concave portion, and each inner pressing foot cooperates and fixes with the corresponding outer concave portion to seal and press the edge of the filter layer; The clamping opening is provided on the inner support portion, and the clamping opening communicates with the outside through the filter layer and the air channels; 2. The filter element of the self-priming filtering particulate respirator according to claim 1, characterized in that, Each outer pressing foot and the corresponding inner concave portion are fixed by resistance welding, and each inner pressing foot and the corresponding outer concave portion are fixed by resistance welding; 3. The filter element of the self-priming filtering particulate respirator according to claim 2, characterized in that There are gaps between the outer support portion, the inner support portion and the filter layer; 4. The filter element of the self-priming filtering anti-particulate respirator according to claim 1 or 2 or 3, characterized in that, Both the outer support portion and the inner support portion are circular. At the diameter of the outer support portion perpendicular to the extending direction of the convex peaks of the filter layer, the two pressing feet are edge pressing feet, and the free ends of the edge pressing feet have mating planes; 5. The filter element of the self-priming filtering particulate respirator according to claim 1 or 2 or 3, characterized in that, The outer support portion has parallel straight edges, the straight edges are parallel to the extending direction of the convex peaks of the filter layer, and there are arc-shaped edges between the two ends of the two straight edges. The inner support portion is circular. At the straight edges of the outer support portion, the two pressing feet are edge pressing feet, the edge pressing feet are planar, and the free ends of the edge pressing feet have mating planes; 6. The filter element of the self-priming filtering particulate respirator according to claim 5, characterized in that, The edge pressing feet are provided with waist-shaped holes for ventilation; 7. The filter element of the self-priming filtering particulate respirator according to claim 1 or 2 or 3, characterized in that, Both the outer support portion and the inner support portion are rectangular; 8. The filter element of the self-priming filtering anti-particle respirator according to claim 7, characterized in that, At the two side edges of the outer support portion parallel to the extending direction of the convex peaks of the filter layer, the pressing feet are large pressing feet, and the free ends of the large pressing feet have mating planes; 9. The filter element of the self-priming filter type particulate respirator according to claim 8, wherein, The large pressing feet are provided with air channels for ventilation; 10. A self-priming filtering anti-particle respirator, comprising a face mask, a filtering element is communicatively arranged on the face mask, a clamping port is arranged on the filtering element, and the filtering element is assembled with the face mask through the clamping port to achieve gas communication, characterized in that: The filter element is the filter element according to any one of claims 1-9.

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