Filtration device and system with removable filtration media

Abstract

The present invention relates to a fluid filtration device (1) having a first face provided with a first opening (111) and at least one second face provided with at least one second opening (112) in communication with said first opening (111), said filtration device (1) comprising a filtration medium (12) arranged between said first opening (111) and said second opening (112) and at least one support element (161, 162) forming a wall downstream of said medium (12). Said device (1) has a third opening (113), said medium (12) being capable of being inserted into and removed from said filtration device (1) via said third opening (113). Said device (1) further comprises a cover (13) configured to close said third opening (113) and first removable fixing means (141, 142, 143, 144) of said cover (13) with said filtration device (1). Figure for abstract: Figure 2

Description

Title of the invention: Filtration device and system with removable filtration media Technical field

[0001] The present invention relates to the field of filtration devices and systems, in particular the filtration of gaseous fluids contaminated by vapors and fumes.

[0002] The present invention relates in particular to the field of devices for industrial dust removal.

[0003] The present invention relates more particularly to a filtration device whose filtering part, i.e. the filtration medium, can be easily removed and replaced.

[0004] The present invention will thus find numerous advantageous applications in the design of filtration systems with reduced maintenance costs. State of the art

[0005] The use of fluid filtration systems is known in many industries, in order to purify, depollute or decontaminate a “dirty” fluid into a “clean” fluid.

[0006] In particular, the field of industrial dust removal corresponds to the filtration of gaseous fluids polluted during industrial activities producing a large quantity of dust-laden fumes, for example plasma cutting.

[0007] A plurality of filtration systems operate from filtration cartridges. Such systems are configured to circulate a fluid, for example a gaseous fluid such as air, between several chambers, forcing the passage through the filtration cartridges. These same filtration cartridges have a rigid structure enclosing and holding in position a filtration media, which absorbs various impurities in the fluid. Depending on the filtration media used, the filtration system can for example absorb, in a gaseous fluid, fumes, humidity or dust.

[0008] During operation of the filtration system, the filtration media gradually becomes clogged by absorption of impurities, reducing its efficiency. Thus, the maintenance of a filtration system corresponds to an exchange of the filtration cartridges, to replace them with cartridges equipped with a new filtration media.

[0009] The Applicant thus observes that the exchange of the filtration cartridges results in a loss of material. Indeed, during the operation of the filtration system, only the filtration media actually loses efficiency. On the contrary, the rest of the filtration cartridge, although it can potentially become clogged, continues to fulfill its function. structural. It therefore does not appear relevant to replace the entire filter cartridge when only one element requires regular replacement.

[0010] Some filter cartridges allow for the replacement of only one part of the cartridge. The cartridge thus has a removable portion consisting of two metal grids containing the filtration media, and forming a single-piece assembly. It also appears that this solution continues to produce unnecessary waste, in particular the metal part.

[0011] The Applicant therefore submits that there is currently no satisfactory alternative solution for a filtration system whose maintenance is as economical as possible. Summary of the invention

[0012] The present invention aims to improve the current situation described above.

[0013] The present invention aims more particularly to remedy the above drawbacks- above by offering a filtration system and device whose maintenance can be ensured by simply replacing the filtration media.

[0014] To this end, the subject of the present invention relates in a first aspect to a fluid filtration device, the device extending substantially along an axis X, the device having a first face provided with a first opening and at least one second face provided with at least one second opening in communication with the first opening so that the fluid circulates in at least one direction of circulation between the first opening and the second opening, the first opening being arranged in a plane substantially perpendicular to the axis X, the at least one second opening being arranged in a plane substantially parallel to the axis X.

[0015] It is understood that the direction of circulation corresponds to a circulation from the first opening to the second opening, or vice versa depending on the integration of the filtration device into a filtration system, or more generally to any system integrating a circulation of the fluid. Depending on the design, the device is configured for a specific direction of circulation or for both directions of circulation.

[0016] It is further understood that the at least one second opening corresponds for example to a single opening or to a plurality of openings, for example a large number of small openings distributed over the surface of the second face. Such a multiplicity of openings is for example implemented by a second face having a grid or openwork structure, in particular as described below.

[0017] Preferably, the device has a cylindrical shape of revolution, the X axis corresponding to the axis of revolution of the device. The device could have other cylinder variants, for example a cylinder having an oval cross-section. According to another variant, the device could have a parallelepiped shape.

[0018] The at least one second opening is placed on the contour wall of the cylinder or parallelepiped, extending along the X axis. The at least one second opening corresponds for example to a radial opening of a device having a cylindrical shape, or to a lateral opening of a device having a parallelepiped shape. The at least one second opening is for example arranged on the entire lateral face(s) of the device (depending on its shape), thus having a very large surface area and allowing, as stated below, the arrangement of a filtration medium of complementary shape with a very large exchange surface area, thus maximizing the filtration efficiency.

[0019] Advantageously, the filtration device comprises a filtration medium having a porous structure, the medium being arranged between the first opening and the second opening.

[0020] The porous structure is configured to allow the fluid to pass through and capture particles or impurities, the porous structure being chosen according to the nature of the treatment to be carried out, i.e. the nature of the fluid and that of the particles or impurities.

[0021] It is understood here that the porous structure of the filtration medium allows the fluid to pass between the first opening and the second opening, while filtering it, that is to say removing one or more impurities.

[0022] By “filtration media” within the meaning of the present invention, we therefore mean exclusively the active part of the filtration device, which performs an action of capturing impurities.

[0023] Obviously, it is understood here that the nature and exact composition of the filtration medium depends on the filtration that one seeks to carry out. The filtration medium is thus selected according to the fluid to be filtered, the impurities to be removed from the fluid and the degree of purity sought at the outlet of the filtration device.

[0024] Preferably, the fluid corresponds to a gaseous fluid, preferably air.

[0025] It is further understood that the filtration device preferably corresponds to a filtration cartridge as known to those skilled in the art, and as described and used in the prior art.

[0026] Advantageously, the filtration device comprises at least one rigid support element having an open or perforated structure allowing the fluid to pass through, the at least one support element forming a wall arranged downstream of the media in the direction of circulation.

[0027] The formation of a wall downstream of the media makes it possible to maintain the filtration media in place while avoiding any deformation during operation of the device, without hindering its operation. It is understood here that the notion of "downstream" is taken into consideration of the direction of circulation of the fluid, the fluid circulating from an upstream opening to a downstream opening.

[0028] It is also understood that, if the device is adapted for circulation of the fluid in two directions of circulation, that is to say both from the first opening to the second opening and vice versa, then the at least one support element forms a wall arranged downstream of the medium in each of the directions of circulation, that is to say two walls. For example, two support elements are provided arranged on either side of the filtration medium.

[0029] The open structure of the support element corresponds for example to a plurality of openings arranged along the support element, or to a grid structure. This design makes it possible both to maintain the media and to allow free circulation of the fluid through the media and the support element.

[0030] The at least one support element, or any portion of the at least one support element arranged on the surface of the device, defines for example the second face. For example, a design is provided comprising at least one rigid support element extending from the first face along the X axis, thus forming the second face. This design can advantageously be supplemented by a filtration medium also extending from the first face along the X axis, in the direct vicinity of the second face.

[0031] The at least one support element and / or the filtration medium extends for example from the first face to the cover described below.

[0032] The at least one support element is for example assembled with the first face, for example welded along its end, adjusted relative to an edge of the first face, glued, crimped, etc.

[0033] In particular, a mesh or openwork structure makes it possible to define the structure of the device at the level of the second opening in a light, solid and simple to produce manner.

[0034] Advantageously, the device has a third opening arranged in a plane substantially perpendicular to the X axis, the media being able to be inserted and removed from the filtration device via the third opening to position itself between the first opening and the at least one second opening, the device further comprising a cover configured to close the third opening and first means for removable attachment of the cover to the filtration device.

[0035] The first opening and the third opening are for example arranged at opposite ends of the filtration device. According to another variant, the first opening and the third opening are arranged in the same plane, the third opening being for example arranged around the first opening. The first opening and / or the third opening and / or the cover are for example centered on the X axis.

[0036] In other words, the device comprises a volume for receiving the filtration media, the third opening allowing access to the receiving volume, as well as the passage of the filtration media for its insertion and removal from the receiving volume.

[0037] Obviously, the cover can close a larger portion of the device, for example a portion in which the fluid circulates before and / or after passing through the filtration medium. According to a particular example described below, the filtration medium has the shape of a tube or a hollow cylinder and the cover covers an entire face of a cylinder comprising the hollow cylinder.

[0038] The first fixing means correspond, according to an advantageous example, to clamping means, for example combined with seals arranged along the ends of the filtration medium, thus ensuring hermetic assembly of the cover and total closure of the third opening.

[0039] Thus, when the filtration medium is clogged after use of the filtration device, the cover can be temporarily removed via the first fixing means, so as to access the filtration medium and exchange it for a new filtration medium. In particular, the at least one support element does not need to be removed with the filtration medium. The at least one support element is for example irremovable with respect to the first face.

[0040] Thanks to the present invention, maintenance of a filtration system can be carried out without completely changing the filtration cartridges, by removing only the part that is actually clogged, i.e. the filtration media. Maintenance costs and waste associated with maintenance are therefore reduced.

[0041] In one embodiment, the device further comprises second means for fixing the filtration device to a wall, the second fixing means being arranged between the first opening and the second opening.

[0042] It is understood here that the second fixing means are configured to allow the mounting of the device, in particular in a filtration system as known to those skilled in the art.

[0043] It is further understood that the arrangement of the second fixing means between the first opening and the second opening makes it possible to associate the first opening with a first side of the wall and the second opening with a second side of the wall. Thus, the device can easily be mounted so that the two fluid circulation openings are associated with two different spaces, the circulation of the fluid between the two spaces passing through the openings and therefore through the filtration medium.

[0044] The second fixing means comprise, for example, a seal to ensure hermetic fixing to the wall. Obviously, the seal is arranged according to the side of the second fixing means which is pressed against the wall.

[0045] Preferably, the first face and the at least one second face are adjacent, the second fixing means being arranged at the junction of the first face and the second face.

[0046] It is understood here that, the first face having the first opening and the at least one second face having the at least one second opening, this design corresponds to a compact embodiment of the device allowing its mounting by separating the first opening from the second opening. The second fixing means extend for example from the first face, radially relative to the X axis.

[0047] Preferably, the device comprises a fixing flange forming the first face and comprising the first opening and the second fixing means.

[0048] The first opening is advantageously arranged along a central portion of the flange, so as to communicate with the interior of the filtration device, the second fixing means being placed on the periphery of the flange.

[0049] The use of a flange thus makes it possible to implement the fixing of the filtration device on the wall with a simple tightening by rotation of the device. The implementation of a fixing flange for assembly on the wall is also simple and known to those skilled in the art. Such a fixing flange can be made of a plurality of materials, preferably aluminum, or even plastic.

[0050] In an additional embodiment, the cover is arranged along a third face offset from the first face, and the filtration device further comprises a cover fixing element, the fixing element being assembled with the first face and comprising the first fixing means.

[0051] The third face is for example opposite the first face, that is to say that the third face and the first face form two ends of the filtration device.

[0052] The fixing element thus corresponds to a part passing through the structure of the filtration device to form a support for fixing the cover, and to allow its hermetic closure, for example by tightening. The fixing element extends for example along the axis X defined above, between the first face and the cover.

[0053] According to another variant, the third face is merged with the first face. The first face then has the first opening and the third opening, the cover closing the third opening while keeping the first opening free. Naturally, such a variant does not require a fixing element passing through the device.

[0054] Preferably, the fixing element comprises: - a flat base configured to receive the first fixing means; and - a plurality of branches assembled on the one hand with the flat base, on the other hand with the first face.

[0055] The branches are for example assembled with the first face at a first end and with the flat base at a second end.

[0056] This design thus makes it possible to form a lightweight structure, which is compact with respect to the fluid flow and resistant. In other words, even if the fixing element is arranged in the path of the fluid during the operation of the device, for example if the fixing element is arranged in an internal volume of the device, its design in several branches allows the fluid to circulate around the fixing element without difficulty.

[0057] In particular, the arrangement of a fixing element in the internal volume of the device makes it possible to ensure a compact design.

[0058] Preferably, the fixing element comprises two branches, the branches and the flat base jointly defining a substantially trapezoidal shape.

[0059] This design corresponds to a particularly simple shape of the fixing element, while remaining rigid in order to avoid deformation of the device during its operation. Such deformation could result in fluid leaks and a loss of filtration efficiency.

[0060] In particular, such a fixing element with two branches extending from the same flat base can be produced from a simple flat sheet folded to form the two branches.

[0061] Obviously, other variants comprising three, four or any other number of branches can also be provided, for example depending on a desired compromise between rigidity of the fixing element and thickness of the branches, to have the least possible impact on the circulation of the fluid.

[0062] In a particular embodiment, the fixing element has a plurality of flat ends assembled to the first face via third fixing means.

[0063] Each branch has, for example, a flat end allowing it to be assembled with the first face. The branches extend, for example, substantially along the X axis, or even obliquely relative to the X axis, and curve or fold back at the first face into a flat end extending in a plane parallel to the first face.

[0064] The flat ends therefore form robust supports for the assembly of the fixing element with the first face, and by extension of the cover with the first face, so as to resist the pressures generated by the circulation of the fluid during operation of the device.

[0065] Preferably, the third fixing means comprise a screw-nut assembly embedded in a matrix of glue.

[0066] It is understood here that the screw-nut assembly makes it possible to assemble the flat ends with the first face. The adhesive matrix covers, for example, the screw-nut assembly and the flat ends, making it possible to both stiffen and seal the assembly between the fastening element and the first face, while providing a smooth surface for receiving, in particular, the filtration media in a sealed manner. In addition, the use of a screw-nut assembly in combination with the adhesive matrix is more resistant to axial forces than the use of an adhesive matrix alone.

[0067] It is also possible to embed the base of the at least one support element in the adhesive matrix, so as to also ensure their assembly to the first face.

[0068] Obviously, a plurality of materials can be considered for producing such an adhesive matrix.

[0069] According to another variant embodiment, the fixing element is directly assembled to a periphery of the first opening, for example by welding, or by providing the first opening with a rim, the branches of the fixing element gripping the rim.

[0070] In a further embodiment, the first fastening means comprise a screw secured to the fastening element and a first nut configured to tighten the cover onto the screw, the cover having a first hole for the screw to pass through.

[0071] This design therefore allows the cover to be tightened with respect to the fixing element, and by extension with respect to the first face. The cover is tightened by tightening the first nut.

[0072] It is further understood that tightening the cover with respect to the first face is particularly advantageous when the cover and the first face are arranged at two ends of the device, resulting in effective and hermetic tightening of the cover.

[0073] Preferably, the fixing element has a second hole for the screw to pass through (preferably on the flat base above), the first fixing means comprising a second nut configured to tighten the screw onto the fixing element.

[0074] It is understood here that the second passage hole is associated with the flat base of the fixing element, for example directly provided on the flat base. This design therefore makes it possible to simply associate the first fixing means with the fixing element, without requiring complex or difficult-to-produce shapes.

[0075] In another embodiment, the first fixing means comprise a threaded rod provided with a head for tightening the cover, the threaded rod being complementary to a thread arranged on the fixing element.

[0076] This design also allows the cover to be tightened with respect to the fixing element. This design is also simpler to produce by having a smaller number of elements. The cover is tightened by tightening the head clamping. The threaded rod with a clamping head corresponds, for example, to a butterfly screw.

[0077] In an advantageous embodiment, the filtration medium extends along the X axis between a first end and a second end and has a body provided with a plurality of folds along the X axis.

[0078] This design is particularly advantageous when the first face and the cover are arranged along two opposite ends of the device, the filtration media then also extending along the entire length of the device to present a greater filtration surface. Obviously, if the cover is arranged along the first face, it remains possible to provide a filtration media extending along the entire length of the device to maximize the filtration surface and ensure that the fluid passes through the media when it circulates between the first opening and the second opening. In other words, the filtration media is advantageously designed so as to prevent the circulation of fluid between the media and the first face and / or the cover.

[0079] It is understood here that the folds participate in the filtration effect of the media, for example by increasing the exchange surface with the fluid.

[0080] This arrangement of the folds, that is to say with a folding line parallel to the X axis, makes it possible to stiffen the filtration medium along this axis of revolution, reducing the risk of deformation and therefore of air circulation beyond the ends, for example, as described above, between the medium and the first face and / or the cover.

[0081] In accordance with the underlying concept of the invention, the ends are made of a plastic material, for example polyester.

[0082] It is understood here that, in the design of the filtration media, the use of metallic elements or any material producing significant waste that is difficult to recover is to be avoided.

[0083] Preferably, the filtration medium has a hollow tube or cylinder structure defining an axis of revolution.

[0084] It is understood here that the hollow tube or cylinder structure allows for a very large exchange surface area for the same volume, maximizing the efficiency of the filtration media. It is also understood that the difference between a tube or cylinder structure corresponds to whether or not the ends of the cylinder are open.

[0085] The axis of revolution corresponds for example to the X axis described above.

[0086] In an embodiment that can be combined with the previous embodiment, the filtration medium has at least one end provided with at least one seal.

[0087] It is understood here that the arrangement of sealing joints makes it possible, as stated above, to prevent the circulation of fluid passing beyond the filtration medium, in particular between the medium and the first face and / or the cover.

[0088] According to a first design, the end(s) are provided with a groove receiving the sealing gasket. The ends therefore correspond to rigid portions of the filtration medium.

[0089] According to a second design, the ends form the seal, and are for example made of a malleable material with a shape complementary to a portion of the first face and / or the cover.

[0090] In another embodiment, the device comprises at least two rigid support elements, the at least two support elements defining a media receiving volume, the receiving volume having the third opening.

[0091] As stated above, the device comprises a media receiving volume, the third opening allowing the insertion and removal of the media in the receiving volume. The two support elements therefore make it possible to delimit the media receiving volume.

[0092] For example, exactly two support elements are provided, including an external support element and an internal support element, the space between the two support elements corresponding to the media reception volume, delimited by the third opening.

[0093] Thus, according to a particular embodiment, the device comprises two rigid support elements extending along the X axis and forming an inner enclosure and an outer enclosure, for example an inner cylinder and an outer cylinder, the media being arranged between the two support elements.

[0094] Preferably, an internal support element is provided assembled with a periphery of the first opening, and an external support element assembled with the first face along an external edge of the first face.

[0095] This design makes it possible to maximize the reception volume relative to the dimensions of the first face.

[0096] According to a second aspect, the present invention relates to a fluid filtration system comprising an enclosure containing at least two chambers separated by a wall, the wall having at least one opening receiving a filtration device according to the first aspect of the invention so that the first opening communicates with a first chamber and the second opening communicates with a second chamber, and pressurization means configured to circulate the fluid between the chambers via the filtration device.

[0097] The filtration device is for example provided with the second fixing means described above, allowing it to be fixed to the wall, for example on means complementary to the second fixing means.

[0098] The wall is for example provided with a plurality of openings, each opening receiving a filtration device, for example as a function of a ratio between a flow rate of air to be treated by the filtration system and the air flow rate that a filtration device can treat. Similarly, a plurality of walls arranged in series may be provided, each wall being provided with one or more filtration devices, for example depending on a ratio between a desired purity of the fluid and a filtration efficiency of an individual device.

[0099] The circulation of the fluid thus corresponds to the passage of the fluid between the first chamber and the second chamber, one of the chambers corresponding to a “dirty” chamber and the other chamber to a “clean” chamber.

[0100] The maintenance of such a filtration system thus corresponds to the opening of the cover of the filtration devices, optionally after having separated them from the wall if the cover is difficult to access, then a replacement of the filtration media in the filtration device.

[0101] Thus, by the various functional and structural characteristics above, the Applicant proposes a device and a system for filtering a fluid whose maintenance requires only the replacement of the filtration media located inside the filtration device, minimizing the losses and waste generated by such maintenance. Brief description of the figures

[0102] Other characteristics and advantages of the present invention will emerge from the description of the particular and non-limiting exemplary embodiments of the present invention below, with reference to the appended figures 1 to 6, and in which:

[0103] [Fig.l]

[0104] [Fig.l] schematically illustrates a filtration device according to a first particular and non-limiting example of embodiment of the present invention;

[0105] [Fig.2]

[0106] [Fig.2] schematically illustrates an exploded and partially sectioned view of a device according to [Fig.l];

[0107] [Fig.3]

[0108] [Fig.3] schematically illustrates an exploded and partially sectional view of a device according to [Fig.l], from which the filtration media is removed;

[0109] [Fig.4]

[0110] [Fig.4] schematically illustrates a filtration media of a filtration device according to [Fig.l]; [YES] [Fig.5]

[0112] [Fig.5] schematically illustrates a sectional view of a portion of a first face of a device according to [Fig.l];

[0113] [Fig.6]

[0114] [Fig.6] schematically illustrates a filtration device according to a second exemplary embodiment of the present invention, from which the filtration media and the cover are removed.

[0115] Description of the examples of embodiment

[0116] A fluid filtration device and system will now be described in the following with joint reference to Figures 1 to 6. The same elements are identified with the same reference signs throughout the description which follows.

[0117] As indicated in the preamble to the description, maintenance operations of current filtration systems result in a waste of materials that are still functional when changing a filtration cartridge.

[0118] One of the objectives of the present invention is to propose a reusable filtration cartridge allowing maintenance generating a minimum of waste.

[0119] This is made possible in the example described below.

[0120] According to the example of Figures 1 and 2, a fluid filtration device 1 is thus provided. Such a device can be integrated into a fluid filtration system, in particular a system as known to those skilled in the art.

[0121] A conventional filtration system, in particular a system for filtering a gaseous fluid such as air, comprises an enclosure containing at least two chambers separated by a wall, the wall having one or more openings. The filtration system also comprises means for pressurizing the fluid, for example ventilation means or a pressurized fluid inlet. The pressurizing means thus allow circulation of the fluid between the two chambers, via the openings in the wall.

[0122] Each opening of the wall thus receives a filtration device 1, corresponding in particular to a filtration cartridge. The circulation of the fluid therefore forces a passage of the fluid through the filtration device 1, so as to obtain a filtered fluid at the outlet of the filtration system. Obviously, depending on the design of the filtration system, its connection, its flow rate, as well as the nature and constraints of the filtrations to be carried out, the filtration system can have a variable geometry and be configured to receive a greater or lesser number of filtration devices 1, in parallel or in series.

[0123] As illustrated in [Fig.l], the device 1 has a first face provided with a first opening 111 and at least one second face provided with at least one second opening 112 in communication with the first opening 111. In other words, the device 1 is designed so that the fluid can circulate through the device, between the first opening 111 and the at least one second opening 112.

[0124] The first opening 111 and the second opening 112 therefore correspond respec tively to a fluid inlet and outlet, or vice versa to a fluid outlet and inlet, depending on its direction of circulation. The device 1 is therefore assembled in the filtration system so that the first opening 111 communicates with a first chamber and the second opening 112 communicates with a second chamber. The pressurizing means therefore allow, depending on the design, a circulation of fluid from the first opening 111 to the second opening 112, or vice versa.

[0125] In the example considered here and as illustrated in Figures 1 to 4 and 6, the device 1 extends substantially along an axis X. In particular, the device 1 here has a cylindrical shape, the axis X forming an axis of revolution of the device 1. The first opening 111 is arranged along the axis X, that is to say in a plane substantially perpendicular to the axis X. The second opening 112 is arranged substantially perpendicular to the axis X, that is to say here along a lateral face of the device 1 of cylindrical shape, that is to say the contour wall of the cylinder. A plurality of second openings 112 are preferably provided, advantageously distributed over the entire lateral face of the device 1, or over a major part of it. It is understood here that, in this example, the second opening 112 corresponds to a plurality of second openings 112 distributed over a large surface defined by the contour wall.The first opening 111 corresponds for example advantageously to a central opening of the device 1, arranged along a longitudinal end of the device 1.

[0126] Advantageously, and as illustrated in Figures 2 and 3, the device 1 comprises second fixing means 151. The second fixing means 151 allow the device 1 to be fixed to a wall, in particular to the wall of the filtration system, separating the two chambers. The second fixing means 151 are thus arranged between the first opening 111 and the second opening 112, so that the fixing of the device 1 correctly results in the arrangement of the first opening 111 and the second opening 112 in separate chambers.

[0127] In this same example, the device 1 comprises a fixing flange 15 forming the first face. The flange 15 comprises the first opening 111, along a central portion as described above, and the second fixing means 151, along the radial ends of the flange 15. The fixing of the device 1 on the wall therefore corresponds to a tightening of the flange 15 on the wall, for example on complementary means. Here, the second fixing means 151 comprise at least three tabs extending radially with respect to the axis X, the tabs each being provided with a notch, allowing the engagement of the tabs of the device 1 in complementary grooves of the wall. The tightening of the flange 15 is then carried out by rotation. As illustrated in [Fig.l], the second fixing means 151 are completed by a seal 154, in particular an annular seal in a cylindrical configuration. The seal 154 ensures that the clamping of the device 1 on the wall, via the flange 15, is airtight, and that the fluid does not circulate between the wall and the device 1.

[0128] The device 1 further comprises, according to the example of Figures 1 and 2, a filtration medium 12 arranged between the first opening 111 and the second opening 112. The medium 12 has a porous structure, that is to say a structure allowing the passage of the fluid while performing a filtration action, for example a capture of impurities, vapors, or even a specific molecule. Obviously, the exact structure of the medium 12 depends on the desired filtration, in particular as a function of criteria based on the nature of the filtration to be carried out, the quality of filtration carried out, and the acceptable pressure drop resulting from the filtration.

[0129] Thus, when the fluid is circulated between the two chambers, it passes through the device 1 via the first opening 111 and the second opening 112, and by extension through the filtration medium 12.

[0130] In this same example, the filtration medium 12 is arranged in the direct vicinity of the second opening 112, and has the shape of a hollow tube fitting into the cylinder of the device 1. The hollow tube and the device 1 both have, for example, the X axis as a shared axis of revolution. The hollow tube shape makes it possible to obtain a very high contact surface area relative to the volume of the device 1, and therefore to maximize the filtration efficiency.

[0131] According to the example of [Fig.4], the media 12 also has a plurality of folds 124 oriented along the axis of revolution of the media 12, that is to say here along the X axis. The folded shape of the media 12 is for example an integral part of its design as a filtering element, in order to maximize its filtration surface. This design also makes it possible to make the media 12 particularly robust along this axis, in order to avoid any deformation. In particular, the deformations of the media 12 can result in a circulation of the fluid around the media 12 to pass between the first opening 111 and the second opening 112, and therefore in a loss of efficiency. Increasing the rigidity of the media 12 therefore makes it possible to ensure prolonged efficiency of the device 1.

[0132] As illustrated in Figures 1 to 3 and 6, the device 1 advantageously comprises at least one rigid support element 171, 172. In the example of Figures 1 to 3, the device 1 comprises two rigid support elements 171, 172 defining a volume for receiving the media 12. In other words, the media 12 is arranged inside the receiving volume and held in position at least partially by the support elements 171, 172.

[0133] The support elements 171, 172 correspond for example to an internal support element 171 and an external support element 172, here to two cylinders of different diameter.

[0134] In another example illustrated in [Fig.6], only one of the two support elements 171, 172 may be present, the one arranged on the downstream side relative to the direction of circulation of the fluid through the medium 12. Here, only one external support element 172 is therefore provided, corresponding to a circulation of the fluid from the first opening 111 to the second opening 112.

[0135] The support elements 171, 172 further have an open or perforated structure allowing the fluid to pass through. Thus, the medium 12 is held in position by the support elements 171, 172 without the latter opposing the circulation of the fluid, and the rigidity of the support elements 171, 172 prevents any deformation or displacement of the medium 12 outside the receiving volume, under the pressure of the fluid. Advantageously, support elements 171, 172 are provided having a grid or perforated structure. Such a structure makes it possible to obtain support elements 171, 172 that are rigid, permeable and simple to manufacture.

[0136] In particular, the combination of a rigidity of the media 12 along the X axis, and the arrangement of the support elements 171, 172 around the media 12 makes it possible to avoid deformations of the media 12 in all directions.

[0137] In accordance with the underlying concept of the invention, the device 1 has a third opening 113 and the media 12 is configured to be inserted and removed from the device 1 via the third opening 113. According to the example of FIGS. 2 and 3, the third opening 113 is arranged along the X axis, that is to say that the media 12 is inserted and removed by translation along the X axis. It is further understood that the receiving volume, in particular the volume formed by the support elements 171, 172, has the third opening 113, since the third opening 113 allows the insertion of the media 12, and that the media 12 is configured to be arranged in the receiving volume.

[0138] Thus, when the medium 12 becomes dirty and loses its effectiveness after prolonged use, it is removed via the third opening 113, and can be replaced by another medium. This design thus makes it possible to preserve the rest of the device 1, in particular the support elements 171, 172, by replacing only the medium 12 which corresponds to the only element which has actually been consumed. Furthermore, the medium 12 can also be replaced for any reason other than a loss of effectiveness, for example to change the filtration to be carried out, provided that the other medium is also capable of being inserted into the receiving volume.

[0139] In combination with the third opening 113, a cover 13 configured to close the third opening 113 is also provided. The cover 13 is removably assembled to the device 1, for example via the first removable fixing means 141, 142, 143, 144 illustrated in FIGS. 1 to 3. Thus, the cover 13 is removed for changing the media 12, and closes the third opening 113 during the operation of the device 1.

[0140] In the example of Figures 1 to 3, the cover 13 is arranged along a third face offset from the first face. The cover 13 is here arranged along a longitudinal end of the device 1, opposite the first face. According to another variant, a cover 13 can be provided arranged along the first face, for example around the first opening 111.

[0141] To ensure the proper functioning of the device 1, it is advantageously provided that the medium 12 has a first end 121 arranged in a sealed manner with respect to a portion of the first face and a second end 122 arranged in a sealed manner with respect to a portion of the cover 13, as illustrated in [Fig. 4]. The medium 12 is for example formed on the one hand of a body 123, which advantageously has the folds 124, on the other hand of moldings arranged along the ends 121, 122 of the body 123 and provided with seals 125. According to the example of [Fig. 5], the ends 121, 122 have a groove receiving the seal 125.According to other examples, the ends 121, 122 are themselves designed to ensure sealing, for example by designing two seals by designing two seals secured respectively to the two end edges of the body 123, for example by gluing, welding or overmolding, and complementary to two grooves arranged on the internal sides of the flange 15 and the cover 13. This design makes it possible to ensure that the ends are rigid, thus reducing the risks of deformation of the medium 12, and a fluid seal between the media 12 and the cover 13, on the one hand, and between the media 12 and the flange 15 comprising the first face, on the other hand.

[0142] When the cover is arranged along a third face offset from the first face, a fixing element 161, 162, 163 is also provided, as illustrated in FIGS. 1 to 3. The fixing element 161, 162, 163 on the one hand is assembled with the first face, on the other hand comprises the first fixing means 141, 142, 143, 144. The use of a fixing element 161, 162, 163 makes it possible in particular to avoid any stress on the support elements 171, 172 resulting from the fixing of the cover 13, in particular on support elements 171, 172 with a mesh structure whose design remains very simple, and also to ensure suitable fixing of the cover 13 on the device 1, subjected to high pressures during the operation of the filtration system.

[0143] Furthermore, the fixing element 161, 162, 163 can be arranged along an internal portion of the device 1, in particular inside the internal support element 171, without increasing its volume and only minimally hindering the circulation of the fluid in the device 1. The use of a cover 13 along the third face also makes it possible to keep support elements 171, 172 with a simple structure, the cover 13 closing not only the third opening 113 but also the opening formed by the internal support element 171. It is therefore not necessary to alter the support elements 171, 172 to close the device 1 opposite the first face.

[0144] In this same example, the fixing element 161, 162, 163 comprises a flat base 161 receiving the first fixing means 141, 142, 143, 144 and a plurality of branches 162 assembled with the base 161 and with the first face. For example, two branches 162 are provided extending on either side of the base 161, jointly forming a trapezoidal shape and which can be produced very simply by folding a flat part.

[0145] As illustrated in [Fig.5], the fixing element 161, 162, 163 has a plurality of flat ends 163, in particular the ends of the branches 162. The flat ends 163 are assembled on the flange 15 via third fixing means 164, 165, 166. The third fixing means 164, 165, 166 comprise on the one hand a screw-nut assembly 164, 165 for assembling the flat ends on the first face, here on the flange 15, on the other hand a matrix of glue 166 embedding the screw-nut assembly 164, 165.

[0146] In this same example, the glue matrix 166 also allows the assembly of the external support element 172 with the first face. Obviously, the internal support element 171 can also be assembled in the same way. Other variants of the attachment between the support element 171, 172 and the first face are also provided, for example by welding, crimping or screwing.

[0147] The glue matrix 166 also forms a contact surface between the flange 15 and the first end 121 of the filtration medium 12. The seal 125 is therefore here arranged between the glue matrix 166 and the first end 121, the glue matrix 166 forming an integral part of the first face.

[0148] Advantageously, the first face has on the one hand a rim around the perimeter 152 of the first opening, which assists in the positioning of the fixing element 161, 162, 163 ([Fig.5]), on the other hand another rim 153 along its radial end, the other rim 153 receiving the external support element 172.

[0149] As stated previously, the cover 13 is assembled to the base 161, and by extension to the first face, via the first fixing means 141, 142, 143, 144. A screw 141 is thus provided integral with the fixing element 161, 162, in particular tightened on the base 161 via a second nut 144. The cover 13 is then tightened on the screw 141 via a first nut 142, in particular a wing nut (or butterfly nut), combined with a washer 143. The removable fixing of the cover 13 is thus implemented by tightening, the loosening of the first nut 142 allowing the removal of the cover 13 and therefore of the media 12. Alternatively, a threaded rod provided with a wing head (butterfly head) can be provided which is screwed onto a thread arranged on the base 161.

[0150] The tightening of the cover 13 in the direction of the first face results in a tightening of the cover 13 on the second face, in particular on the ends 173 of the support elements 171, 172. This tightening of the cover 13 makes it possible to slightly crush the seals at the ends 121, 122 of the medium 12, on one side on the cover 13 and on the other on the flange 15, thus making it possible to ensure sealing between the medium 12 and the cover 13, on the one hand, and between the media 12 and the flange 15, on the other hand.

[0151] Thus, it will be understood that the present invention provides a device and a filtration system for fluid, the filtration of which is ensured by a filtration medium, allowing the replacement of the medium when it has been sufficiently used and is therefore clogged, while retaining all the other elements of the filtration device. Such a device therefore has reduced maintenance costs and generates less waste compared to removable cartridge solutions.

[0152] It should be noted that this detailed description relates to a particular embodiment of the present invention, but that in no case does this description have any limiting character with respect to the subject of the invention; on the contrary, its objective is to remove any possible imprecision or any misinterpretation of the claims which follow.

[0153] It should also be noted that the reference signs placed in parentheses in the following claims are in no way limiting; these signs have the sole purpose of improving the intelligibility and understanding of the following claims as well as the scope of the protection sought.

Claims

Claims

1. A fluid filtration device (1), said device extending substantially along an axis X, said device having a first face provided with a first opening (111) and at least one second face provided with at least one second opening (112) in communication with said first opening (111) so that said fluid circulates in at least one direction of circulation between said first opening (111) and said second opening (112), said first opening (111) being arranged in a plane substantially perpendicular to said axis X, said at least one second opening (112) being arranged in a plane substantially parallel to said axis X, said filtration device (1) comprising a filtration medium (12) having a porous structure, said media (12) being arranged between said first opening (111) and said second opening (112), said filtration device (1) comprising at least one support element (171,172) rigid having an open or perforated structure allowing said fluid to pass through, said at least one support element (171, 172) forming a wall arranged downstream of said medium (12) in said direction of circulation, characterized in that said device (1) has a third opening (113) arranged in a plane substantially perpendicular to said axis X, said medium (12) being able to be inserted and removed from said filtration device (1) via said third opening (113) to position itself between said first opening (111) and said at least one second opening (112), said device (1) further comprising a cover (13) configured to close said third opening (113) and first removable fixing means (141, 142, 143, 144) of said cover (13) with said filtration device (1).,

2. Filtration device (1) according to claim 1, which further comprises second fixing means (151) for said filtration device (1) on a wall, said second fixing means (151) being arranged between said first opening (111) and said second opening (112).

3. Filtration device (1) according to claim 2, which comprises a fixing flange (15) forming said first face and comprising said first opening (111) and said second fixing means (151).

4. Filtration device (1) according to one of claims 1 to 3, in wherein said cover (13) is arranged along a third face offset from said first face, and said filtration device (1) further comprises a fixing element (161, 162, 163) for said cover (13), said fixing element (161, 162, 163) being assembled with said first face and comprising said first fixing means (141, 142, 143, 144).

5. Filtration device (1) according to claim 4, wherein said fixing element (161, 162, 163) comprises: - a flat base (161) configured to receive said first fixing means (141, 142, 143, 144); and - a plurality of branches (162) assembled on the one hand with said flat base (161), on the other hand with said first face.

6. A filtration device (1) according to claim 5, wherein said fixing element (161, 162, 163) comprises two branches (162), said branches (162) and said planar base (161) jointly defining a substantially trapezoidal shape.

7. Filtration device (1) according to one of claims 4 to 6, wherein said fixing element (161, 162, 163) has a plurality of flat ends (163) assembled with said first face via third fixing means (164, 165, 166).

8. Filtration device (1) according to claim 7, wherein said third fixing means (164, 165, 166) comprise a screw-nut assembly (164, 165) embedded in a matrix of glue (166).

9. Filtration device (1) according to one of claims 4 to 8, wherein said first fixing means (141, 142, 143, 144) comprise a screw (141) integral with said fixing element (161, 162, 163) and a first nut (142) configured to tighten said cover (13) on said screw (141), said cover (13) having a first passage hole (131) for said screw (141).

10. Filtration device (1) according to claim 9, wherein said fixing element (161, 162, 163) has a second hole for passage of said screw (141), said first fixing means (141, 142, 143, 144) comprising a second nut (144) configured to tighten said screw (141) on said fixing element (161, 162, 163).

11. Filtration device (1) according to one of claims 4 to 8, wherein said first fixing means (141, 142, 143, 144) comprise a threaded rod provided with a head for tightening said cover (13), said threaded rod being complementary to a tapping arranged on said fixing element (161, 162, 163).

12. Filtration device (1) according to one of claims 1 to 11, wherein said filtration media (12) extends along said axis X between a first end (121) and a second end (122) and has a body (123) provided with a plurality of folds (124) along said axis X.

13. Filtration device (1) according to one of claims 1 to 12, wherein said filtration medium (12) has at least one end (121, 122) provided with at least one seal (125).

14. Filtration device (1) according to one of claims 1 to 13, which comprises at least two rigid support elements (171, 172), said at least two support elements (171) defining a volume for receiving said media (12), said receiving volume having said third opening (113).

15. A fluid filtration system comprising an enclosure containing at least two chambers separated by a wall, the wall having at least one opening receiving a filtration device (1) according to one of claims 1 to 14 so that said first opening (111) communicates with a first chamber and said second opening (112) communicates with a second chamber, and pressurization means configured to circulate said fluid between the chambers via said filtration device (1).

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