Filtering device

Abstract

A filter device (6), in particular for filtering body residues, comprises: a housing (9) provided with an inlet (7) for a fluid to be filtered and an outlet (8) for a filtered fluid; a cylindrical filter element (13) housed inside said housing, the filter element comprising a first flange (21) provided with a first surface (23) extending radially from the first bottom, a second flange (22) provided with a second surface (24) extending radially from the first bottom, the housing further comprises a first retaining element (27) positioned opposite the first face and a second retaining element (28) positioned opposite the second face, the first retaining element and the second retaining element being arranged to maintain a minimum spacing between the first flange and the second flange.

Description

Technical Field

[0001] The present invention relates to the field of filtering devices, in particular to the field of filtering devices for filtering body residues. The present invention also relates to a massage appliance comprising a skin suction device, the suction device comprising such a filtering device. Background Art

[0002] For skin massage, massage appliances provided with a skin suction device are generally used. For example, these massage appliances may include a treatment head configured to perform a touch-rolling type massage. The treatment head is connected to the suction device through a suction circuit. The suction device facilitates the generation of skin folds inside the massage head. For example, the massage appliances are disclosed in the published cases EP0224422A1, EP0917452A1 or WO2015185814A1. During the use of the massage appliance, the suction device receives various body residues, that is, residues from the human body, especially organic components, such as dead skin, dandruff, hair, sebum, sweat or any other substances that may be present on the skin surface. To ensure the hygiene and good functionality of the massage appliance, the suction device is generally provided with a filtering device, such as a filter cartridge. Such a filter cartridge is provided with a filtering element that filters the various body residues described above. The filter cartridge must be replaced very often, which generates a large amount of waste.

[0003] To reduce the environmental impact of used filter cartridges, filter cartridges provided with a filtering element made of natural and / or biodegradable materials have been proposed. However, the mechanical properties of these materials are generally worse than those of the materials conventionally used, and thus do not allow for effective and durable filtering.

[0004] At the same time, the massage appliance must still be very simple to use. In particular, any user should be able to replace the filter cartridge quickly and simply. Summary of the Invention

[0005] The object of the present invention is to provide a filter cartridge that remedies the above disadvantages and improves the filter cartridges known in the prior art.

[0006] More precisely, a first subject of the present invention is a filter cartridge that can achieve effective and durable filtering even if the mechanical strength of its filtering element is low.

[0007] The present invention relates to a filtering device, particularly a filtering device for filtering body residues, which filtering device comprises a housing provided with an inlet for the fluid to be filtered and an outlet for the filtered fluid, a cylindrical filtering element accommodated in the housing, the cylinder of the filtering element comprising a first bottom, a first flange fastened to the first bottom, the first flange comprising a first surface extending radially from the first bottom, the cylinder of the filtering element comprising a second bottom opposite the first bottom, a second flange fastened to the second bottom, the second flange comprising a second surface extending radially from the second bottom, the housing further comprising a first holding element positioned opposite the first surface and a second holding element positioned opposite the second surface, the first holding element and the second holding element being arranged to maintain a minimum spacing between the first flange and the second flange.

[0008] The filtering element can be configured to filter body residues, particularly organic components such as dead skin, dandruff, hair, sebum or sweat.

[0009] The first holding element can be located outside the projection of the second surface along the generatrix of the cylinder, and the second holding element can be located outside the projection of the first surface along the generatrix of the cylinder.

[0010] The housing can comprise a first part and a second part, the first part and the second part being removably fastened together so as to provide access to the filtering element accommodated in the housing, the first holding element being integral with the first part of the housing and the second holding element being integral with the second part of the housing.

[0011] The first holding element can extend through the plane extending through the second surface parallel to the generatrix of the cylinder of the filtering element. The second holding element can extend through the plane extending through the first surface parallel to the generatrix of the cylinder of the filtering element.

[0012] The first surface can extend radially outward of the first bottom. The second surface can extend radially outward of the second bottom.

[0013] The first surfaces can be separated from each other by a first opening, and the second holding element extends through the first opening. The second surfaces can be separated from each other by a second opening, and the first holding element extends through the second opening.

[0014] The housing can also comprise a cylinder, the generatrix of the cylinder of the housing being parallel to the generatrix of the cylinder of the filtering element, and the inlet and the outlet of the housing being concentrically arranged on the bottom of the cylinder of the housing.

[0015] The filtering element can comprise cellulose and / or viscose fiber and / or polylactic acid. The first flange and the second flange can comprise polylactic acid and / or polyhydroxyalkanoate and / or poly(β-hydroxybutyric acid) and / or poly(hydroxybutyric acid-co-hydroxyvaleric acid) and / or poly(butylene adipate-co-butylene terephthalate).

[0016] The first flange and the second flange can be adhesively bonded or welded to the filter element.

[0017] The filtering device can be a filter cartridge configured to be assembled to the housing of the suction device in a sealed and removable manner.

[0018] The present invention also relates to a method for replacing the filter element of the above-mentioned filtering device, characterized by comprising:

[0019] - disassembling the housing into two parts, and then

[0020] - extracting the filter element accommodated in the housing by a translational movement parallel to the generatrix of the cylindrical shape of the filter element, and then

[0021] - providing a new filter element, and then

[0022] - inserting the new filter element into the housing by a translational movement parallel to the generatrix of the cylindrical shape of the new filter element, and then

[0023] - reassembling the two parts of the housing.

[0024] The present invention also relates to a massage appliance, which comprises a skin suction device, and the suction device comprises the above-mentioned filtering device. Description of the Drawings

[0025] These objects, features and advantages of the present invention will be elaborated in detail in the following description of specific embodiments, which is carried out in a non-limiting manner in conjunction with the accompanying drawings, wherein:

[0026] Figure 1 is a schematic view of a massage appliance equipped with a filter cartridge according to an embodiment of the present invention.

[0027] Figure 2 is a perspective view of the filter cartridge.

[0028] Figure 3 is an exploded view of the filter cartridge.

[0029] Figure 4 is a cross-sectional view of the filter cartridge.

[0030] Figure 5 is a perspective view of a filter element provided with two flanges.

[0031] Figure 6 is a perspective view of the first part of the housing of the filter cartridge.

[0032] Figure 7 is a perspective view of the second part of the housing of the filter cartridge.

[0033] Figure 8 is a schematic sectional view of the filter cartridge.

[0034] Figure 9 4 is a schematic cross-sectional view of a filter cartridge according to a modification of the first embodiment of the present invention.

[0035] Figure 10 4 is a schematic cross-sectional view of a filter cartridge according to a second modified embodiment of the present invention.

[0036] Figure 11 4 is a schematic cross-sectional view of a filter cartridge according to a third modified embodiment of the present invention. DETAILED DESCRIPTION

[0037] Figure 1 A massage device 1 according to one embodiment of the invention is schematically shown. The massage device 1 comprises a treatment head 2 designed to be placed against the skin and a suction device 3 connected to the treatment head 2 via a suction duct 4. The treatment head 2 can be configured to perform a touch-rolling type massage. To this end, it can include at least one roller arranged in the working room. The suction duct 4 is connected to the working room in order to establish a negative pressure. The working room is designed to be placed against the skin of a patient to be treated in order to form a skin fold. Therefore, the suction device 3 is designed to generate a negative pressure in the ambient air and is able to suck body residues present on the surface of the patient's skin.

[0038] The suction device 3 comprises a suction member 5, in particular a pump, configured to generate a negative pressure. The suction device 3 also comprises a suction device, in particular in the form of a filter cartridge 6. The suction member 5 can, for example, generate a pressure difference of approximately -0.5 bar, or even 0.8 bar, or even 0.9 bar. The suction member 5 is hydraulically connected to the processing head 2 via the filter cartridge 6. The filter cartridge 6 comprises an inlet 7 for the fluid to be filtered and an outlet 8 for the filtered fluid. In this case, the fluid consists of ambient air, but alternatively it can also contain another gas or liquid.

[0039] The filter cartridge 6 comprises a housing 9 which is generally cylindrical. The cylinder comprises two circular bottoms connected by a set of generatrixes. Thus, the generatrix is ​​a set of mutually parallel line segments connecting the two bottoms of the cylinder. The inlet 7 and the outlet 8 are concentrically arranged on the cylindrical bottom of the housing. In particular, the outlet 8 is arranged around the inlet 7. Thus, the fluid flow F( Figure 4 The inlet 7 and the outlet 8 are provided with a thread 10, which is designed to cooperate with the threaded opening in the housing of the suction device 3.

[0040] Figure 2 , Figure 3 and Figure 4 respectively show a top view, an exploded view, and a cross-sectional view of the filter cartridge 6. Advantageously, the housing 9 includes a first part 11 and a second part 12 that are removably fastened to each other. In this way, the user can access the filter element 13 housed within the housing in order to replace it. In particular, the first part 11 may form a box body, and the second part 12 may form a lid of the box body. The first part 11 and the second part 12 are secured to each other by fastening elements 14. According to the illustrated embodiment, the fastening element 14 holds the second part 12 against the first part 11 by a bayonet mechanism. The fastening element 14 passes through an opening 15 provided in the second part 12 and includes an elbow-shaped groove 16 that mates with a lug formed in the first part 11. Advantageously, the fastening element 14 includes a knurled head 17 that facilitates manual rotation of the fastening element 14 to actuate the bayonet mechanism. Seals 18, 19 are respectively provided at the interface between the first part 11 and the second part 12 and at the interface between the fastening element 14 and the opening 15. The opening 15 may be provided with a clip that mates with a groove of the fastening element 14 to hold the fastening element 14 integral with the second part 12 of the housing. Alternatively, the first part 11 and the second part 12 may be fastened to each other in a different manner. For example, the fastening element 14 may include a screw that mates with a threaded opening of the first part. The second part may also be directly screwed or clipped onto the first part. According to another embodiment, the first part and the second part may be non-removably fastened to each other. They may be, for example, welded or glued to each other.

[0041] According to another variant of an embodiment not shown, the filtering device may be different from the filter cartridge. The filtering device may, for example, be integrated into the housing of the suction device. The housing of the suction device may then include a recess that is provided with an inlet for the fluid to be filtered and an outlet for the filtered fluid. The recess will be designed to receive the filter element 13 and may be closed by a lid that is removably fastened to the housing. The recess will thus form the first part 11 of the housing 9, and the lid will thus form the second part 12 of the housing 9.

[0042] Figure 5More precisely shows the filter element 13 accommodated inside the housing 9. The filter element 13 is configured to hold the body residues contained in the fluid passing through it. It may include a honeycomb or mesh structure, the characteristics of which are adapted to hold the body residues. According to the ISO 5011 standard, it may have an efficacy of greater than or equal to 99%, or even greater than or equal to 99.5%. Preferably, the filter element may comprise a compostable material, particularly according to the EN 13432 standard. The filter element 13 may also be made of recycled materials and / or of natural materials such as plant materials. More generally, the filter element 13 may be designed and / or manufactured using environmentally friendly principles. For example, the filter element includes cellulose and / or viscose fiber and / or polylactic acid. Preferably, the filter element 13 does not include any reinforcing elements to increase the stiffness of the filter element. In particular, it does not include any plastic or metal reinforcing elements.

[0043] The filter element 13 includes a cylinder. The cylinder includes a first bottom and a second bottom opposite to the first bottom. Both the first bottom and the second bottom have an annular shape and are interconnected by a set of generatrices parallel to the axis X. The axis X is also parallel to the generatrix of the cylinder of the housing 9.

[0044] The filter element 13 is also provided with a first flange 21 and a second flange 22, which are fastened, for example, by gluing or welding, to the first bottom and the second bottom of the cylinder of the filter element 13, respectively. The flanges 21 and 22 are in the form of plates with a substantially constant thickness and extend parallel to each other perpendicular to the axis X. The filter element 13 and the flanges 21, 22 each include a central opening centered on the axis X.

[0045] Like the filter element 13, the flanges 21 and 22 may comprise a compostable material, particularly according to the EN 13432 standard. The flanges 21 and 22 may also be made of recyclable materials and / or of natural materials such as plant materials. More generally, the flanges 21 and 22 may be designed and / or manufactured using environmentally friendly principles. For example, the flanges 21, 22 include polylactic acid and / or polyhydroxyalkanoate and / or poly(β-hydroxybutyric acid) and / or poly(hydroxybutyric acid-co-hydroxyvaleric acid) and / or poly(butylene terephthalate). According to one embodiment, the filter element 13 and the flanges 21, 22 may be manufactured as a single-piece element, for example, made of polylactic acid.

[0046] The first flange 21 includes a first surface 23 that extends radially from the cylindrical first bottom of the filter element 13. Similarly, the second flange 22 includes a second surface 24 that extends radially from the cylindrical second bottom of the filter element 13. In particular, the first surface 23 and the second surface 24 extend in the centrifugal direction with respect to the axis X. They form a protrusion or a bulge that extends radially from the axis X. According to the illustrated embodiment, the first flange 21 includes five first surfaces 23, and the second flange 22 includes five second surfaces 24. Alternatively, the number can be any number, preferably greater than or equal to 2, especially three or four surfaces. The first surfaces 23 are separated from each other by a first opening 25. Similarly, the second surfaces 24 are separated from each other by a second opening 26. The first surface and the second surface 24 are offset from each other in a projection parallel to the axis X. In particular, the first opening 25 is positioned opposite the second surface 24 along the axis X. Similarly, the second opening 26 is positioned opposite the first surface 23 along the axis X. The first flange 21 and the second flange 22 may respectively include a circumcircle Cl at their first surface 23 or second surface 24, and the diameter of this circumcircle is strictly greater than the diameter of the circumcircle of the filter element 13. The first flange 21 and the second flange 22 may respectively include a circumcircle C2 at their first opening 25 or second opening 26, and the diameter of this circumcircle is substantially equal to the diameter of the circumcircle of the filter element 13. Preferably, the first surfaces 23 have the same shape as each other and are distributed around the axis X. Similarly, the second surfaces 24 have the same shape as each other and are distributed around the axis X.

[0047] Figure 6 and Figure 7 respectively show a first part 11 and a second part 12 of the housing 9. The first part 11 of the housing 9 includes a first holding element 27 positioned opposite the first surface 23. Similarly, the second part 12 of the housing 9 includes a second holding element 28 positioned opposite the second surface 24. The first holding element 27 and the second holding element 28 are arranged to maintain a minimum spacing along the axis X between the first flange 21 and the second flange 22. The first holding element 27 and the second holding element 28 form stoppers that can apply a supporting force on the inner surfaces of the first surface 23 and the second surface 24 respectively. The holding elements 27, 28 prevent the filter element from collapsing by itself along the axis X. When the filter element 13 is in place within the housing 9, a gap along the axis X, for example about one millimeter or a few millimeters, can be established on the one hand between the first holding element 27 and the first surface 23, and on the other hand between the second holding element 28 and the second surface 24. Alternatively, the dimensions of the filter cartridge can be designed such that there is no gap on the one hand between the first holding element 27 and the first surface 23, and on the other hand between the second holding element 28 and the second surface 24. Then, under the action of the holding elements 27, 28, the filter element 13 can be slightly tensioned along the axis X.

[0048] The first holding element 27 is located outside the projection of the second surface 24 along the generatrix of the cylinder (i.e., the projection parallel to the axis X). In particular, the first holding element 27 extends parallel to the axis X through the second opening 26. The first holding element 27 extends through the plane P2 in which the second surface 24 extends (as Figure 4 shown). In particular, the first holding element 27 extends from the cylindrical bottom of the housing 9, which is opposite to the cylindrical first bottom of the filter element 11. The first holding element 27 extends along the cylindrical wall 29 of the first part 11 of the housing, thereby allowing an increase in rigidity. The first holding element 27 may have a constant cross-section along the axis X, in particular a U-shaped cross-section. The first part 11 of the housing 9 may include as many first holding elements 27 as the first surface 23, and each first holding element 27 is adapted to cooperate with the first surface 23.

[0049] Similarly, the second holding element 28 is located outside the projection of the first surface 23 along the generatrix of the cylinder. In particular, the second holding element 28 extends parallel to the axis X through the first opening 25. The second holding element 28 extends through the plane P1 in which the first surface 23 extends (as Figure 4 shown). In particular, the second holding element 28 projects from the cylindrical bottom of the housing 9, which is opposite to the cylindrical second bottom of the filter element 11. The second holding element 28 may have a constant cross-section along the axis X, in particular an O-shaped cross-section. The second part 12 of the housing 9 may include as many second holding elements 28 as the second surface 24, and each second holding element 28 is adapted to cooperate with the second surface 24.

[0050] Both the first part 11 and the second part 12 can be one-piece parts, obtained by molding (e.g., injection molding). In addition, it can be seen that the first part 11 of the housing 9 may include a first support 31, and the second surface 24 of the second flange 22 may rest on the first support 31. The first support 31 may be located between the first holding elements 27, opposite the second holding elements 28. These supports 31 may be in the form of ribs with a U-shaped cross-section. These supports 31 also contribute to the rigidity of the first part 11 of the housing 9. Similarly, the second part 12 of the housing 9 may include a second support 32, and the first surface 23 of the first flange 21 may rest on the second support 32. The second support 32 may be located between the second holding elements 28, opposite the first holding elements 27. These supports 32 may be in the form of ribs with a U-shaped cross-section. These supports 21 also contribute to the rigidity of the second part 12 of the housing 9. The first flange 21 is designed to be locked in place between the first holding element 27 and the second support 32. Similarly, the second flange 22 is designed to be locked in place between the second holding element 28 and the first support 31.

[0051] The first part 11 of the housing also includes a centering device 33 extending into the central opening of the filter element. The centering device 33 includes an opening 34 communicating with the inlet 7 and supports a lug 35 that mates with the elbow-shaped groove 16 of the fastening element 14. Finally, the first part 11 may also include a guiding and positioning member 36 for guiding and positioning the filter element 13. In particular, the guiding and positioning member 36 may be formed by two walls that extend radially from the cylindrical wall 29 and extend parallel to the axis X. The spacing between the two walls substantially corresponds to the width of one of the second surfaces 24. Thus, when the filter element 13 is inserted into the first part 11 of the housing 9, the filter element 13 can be guided to translate parallel to the axis X and can be locked against rotation about the axis X. Advantageously, all of the second surfaces 24 have the same width, such that various orientations of the filter element 13 within the housing 9 are possible.

[0052] When the massage appliance is operating, the massage head 2 presses against the patient's skin, and the suction member 5 generates a negative pressure, thereby forming skin folds within the massage chamber. Body residues on the skin surface are sucked away. The air stream F carrying these body residues then enters the filter cartridge 6 through the inlet 7, passes through the filter element 13, and is discharged through the outlet 8. The body residues are blocked by the filter element 13. The air leaving the filter cartridge is clean, which ensures good hygiene and normal operation of the massage appliance. The air stream F passing through the filter element 13 exerts a mechanical stress on the filter element 13, which will cause the filter element 13 to collapse. This stress is more significant when the material constituting the filter element 13 has a low mechanical strength and does not include any specific reinforcement. However, the combined action of the first retaining element 27 on the first surface 23 of the first flange 21 and the second retaining element 28 on the second surface 23 of the second flange 22 prevents the filter element from collapsing along the axis X. Thus its effectiveness is maintained.

[0053] When the filter cartridge 6 needs to be replaced, the user can simply unscrew it from the housing of the filtering device. Then, assuming the housing 9 cannot be opened, the filter cartridge 6 is discarded in the trash can. The use of an environmentally friendly material for the filter element 13 has, to a lesser extent, allowed for a reduction in the environmental impact of disposing of the filter cartridge 6.

[0054] Preferably, the housing 9 can be opened to access the filter element. According to the illustrated embodiment, after removing the cartridge 6 from the housing, the user can remove the fastening element 14 and then disassemble the two parts 11 and 12 of the housing 9. Then, he can withdraw the filter element 13 received in the housing by a single translational movement parallel to the axis X. To do this, he can grasp the first flange 21. In this way, the user does not need to touch the filter element 13. Then, once the filter element 13 has been removed, he can obtain a new, identical filter element and insert it into the first part 11 of the housing 9. This insertion is very simple because it only requires displacing the filter element parallel to the axis X. By observing the second surface 24 and the first holding member 27 and / or the guiding and positioning member 36, it is easy to visually determine the correct orientation of the filter element around the axis X. Finally, the two parts 11 and 12 of the housing can be reassembled, and the fastening element 14 can be put back to ensure the closure of the housing. Then it is only necessary to screw the cartridge back onto the housing of the suction device. The filter element can be composted or placed in the trash can, where it will rapidly degrade. Thanks to the present invention, it is thus possible to effectively reduce the amount of waste associated with the use of the massaging appliance while maintaining the performance and hygiene of its suction device.

[0055] If the filtering device is directly integrated into the housing of the suction device, it is only necessary to remove the lid to access the recess in which the filter element is located, then replace the filter element with a new one and then put the lid back.

[0056] Figure 8 The above-mentioned cartridge 6 is schematically shown. Figures 9 to 11 Embodiment variants of the cartridge are schematically shown. The description of these variants focuses on the differences with respect to the cartridge 6 described above. For each of these three variants, objects having functions similar to those of the objects of the cartridge 6 are denoted by the same reference numerals and are provided with suffixes, namely "A", "B" and "C" respectively.

[0057] Figure 9 A cartridge 6A similar to the cartridge 6 is shown, but in which the first holding member 27A does not extend from the cylindrical bottom of the first part 11A, but from the cylindrical wall 29A of the first part 11A. This can reduce the amount of material used to manufacture the first part 11A. On the other hand, the effect of strengthening the cylindrical wall 29A by the first holding member 27A is reduced, and this variant may require the use of more complex injection molds.

[0058] Figure 10A filter cartridge 6B similar to the filter cartridge 6 is shown, but in which the first flange 21B extends radially not towards the outside of the filter element 13B (i.e., in the centrifugal direction), but towards the inside of the filter element 13B. Accordingly, the first holding member 27B extends into the central opening of the filter element 13B. Thus, the first holding member also serves as a centering device for the filter element 13B and is provided with an opening 34B communicating with the inlet 7B. The first flange 21B may be disc-shaped and the second flange 22B may be annular with a central opening through which the first holding member 27B passes. In another variant (not shown), the second flange may extend radially towards the inside of the filter element while the first flange will extend towards the outside of the filter element.

[0059] Figure 11 A filter cartridge 6C similar to the filter cartridge 6 is shown, but in which the first flange 21C and the second flange 22C extend radially not towards the outside of the filter element 13C, but towards the inside of the filter element 13C. Accordingly, the first holding member 27C and the second holding member 28C extend into the central opening of the filter element 13C. The first holding member 27C and the second holding member 28C may also serve as centering devices for the filter element 13C. Like the filter element 13 described previously, the first flange 21C may include a first surface 23C and the second flange 22C may include a second surface 24C. The first surface 23C and the second surface 24C are interrupted by an opening and are offset from each other in a projection parallel to the generatrix of the filter element 13C. This embodiment has the advantage of a more compact filter element 13C.

Claims

1. A filtering device (6), particularly a filtering device for filtering body residues, the filtering device comprising: A housing (9) provided with an inlet (7) for the fluid to be filtered and an outlet (8) for the filtered fluid; A cylindrical filter element (13) housed inside the housing, the cylindrical shape of the filter element including a first bottom, a first flange (21) fastened to the first bottom, the first flange including a first surface (23) extending radially from the first bottom, the cylindrical shape of the filter element including a second bottom opposite the first bottom, a second flange (22) fastened to the second bottom, the second flange including a second surface (24) extending radially from the second bottom, the housing further including a first holding element (27) positioned opposite the first surface and a second holding element (28) positioned opposite the second surface, the first holding element and the second holding element arranged to maintain a minimum spacing between the first flange and the second flange.

2. The filtering device (6) according to the preceding claim, characterized in that, The filter element is configured to filter body residues, in particular organic components such as dead skin, dandruff, hair, sebum or sweat.

3. The filtering device (6) according to any one of the preceding claims, characterized in that The first holding element is located outside the projection of the second surface along the generatrix of the cylinder, and the second holding element is located outside the projection of the first surface along the generatrix of the cylinder.

4. The filtering device (6) according to any one of the preceding claims, characterized in that The housing (9) includes a first part (11) and a second part (12), the first part and the second part being removably fastened to each other so as to be able to access the filter element (13) housed in the housing, the first holding element (27) being integral with the first part of the housing, and the second holding element (28) being integral with the second part of the housing.

5. The filtering device (6) according to any one of the preceding claims, characterized in that: - The first holding element (27) extends through the plane (P2) through which the second surface (24) extends parallel to the generatrix of the cylinder of the filter element, and / or - The second holding element (28) extends through the plane (P1) through which the first surface (23) extends parallel to the generatrix of the cylinder of the filter element.

6. The filtering device (6) according to any one of the preceding claims, characterized in that: - The first surface (23) extends radially outward of the first bottom, and / or - The second surface (24) extends radially outward of the second bottom.

7. The filtering device (6) according to any one of the preceding claims, characterized in that: - The first surfaces (23) are separated from each other by a first opening (25) through which the second holding element (28) extends, and / or - The second surfaces (24) are separated from each other by a second opening (26) through which the first holding element (27) extends.

8. The filtering device (6) according to any one of the preceding claims, characterized in that, The housing (9) also includes a cylindrical shape, the generatrix of the cylinder of the housing being parallel to the generatrix of the cylinder of the filter element, and the inlet (7) and the outlet (8) of the housing being concentrically arranged at the bottom of the cylinder of the housing.

9. The filtering device (6) according to any one of the preceding claims, characterized in that, The filter element (13) comprises cellulose and / or viscose fibers and / or polylactic acid.

10. The filtering device (6) according to any one of the preceding claims, characterized in that The first flange (21) and the second flange (22) comprise polylactic acid and / or polyhydroxyalkanoates and / or poly(β-hydroxybutyric acid) and / or poly(hydroxybutyrate-co-hydroxyvalerate) and / or poly(butylene terephthalate).

11. The filtering device (6) according to any one of the preceding claims, characterized in that, The first flange (21) and the second flange (22) are adhesively bonded or welded to the filter element.

12. The filtering device (6) according to any one of the preceding claims, characterized in that, The filtering device is a filter cartridge configured to be assembled to the housing of the suction device (3) in a sealed and removable manner.

13. A method for replacing the filter element (13) of the filter device (6) according to any one of the preceding claims, characterized in that, The method comprises: - disassembling the housing (9) into two parts (11, 12), and then - extracting the filter element received in the housing by a translational movement parallel to the generatrix of the cylindrical shape of the filter element, and then - providing a new filter element (13), and then - inserting the new filter element into the housing by a translational movement parallel to the generatrix of the cylindrical shape of the new filter element, and then - reassembling the two parts of the housing.

14. A massage appliance (1) comprising a skin suction device (3), the suction device comprising a filtering device (6) according to any one of claims 1 to 12.

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