An EMC fluid filter

Abstract

An EMC fluid filter includes: a filter medium having a filter structure that allows fluid to flow from a first side of the filter structure to a second side of the filter structure; a non-filter medium connected to the filter medium; and wherein the filter medium and the non-filter medium are formed together from one or more materials into a seamless, one-piece component.

Description

Technical Field

[0001] Embodiments of the present invention relate to an EMC fluid filter. More specifically, the present invention relates to an EMC fluid filter for use in an air filtration system. Background Technology

[0002] Fluid filters are used in many applications to separate unwanted fluids from other fluids, or to remove other unwanted substances, such as dust or debris, from a fluid. In one example, a fluid filter can be used to separate water or other liquids, or solid particulate matter, such as dust, from the air flowing into a volume or area (such as a room in a building or the interior of a vehicle). Such a volume or area may be occupied by people, animals, or goods. Due to the widespread use of electrical and electronic equipment, such filters are often also required to be electromagnetically compatible so that they can function properly in the electromagnetic environment in which they are intended to operate. These filters are used in a variety of applications to isolate an electromagnetically protected volume or area from surrounding volumes or areas. Filters can absorb electromagnetic waves while allowing fluids, particularly air, to flow into and out of the protected volume or area.

[0003] The present invention aims to mitigate one or more problems associated with the prior art. Summary of the Invention

[0004] According to a first aspect of the present invention, we provide an EMC fluid filter comprising: A filter medium having a filter structure that allows fluid to flow from a first side of the filter structure to a second side of the filter structure; The non-filtering medium connected to the filter medium; and The filter medium and the non-filter medium are formed into a seamless, one-piece component by one or more materials.

[0005] The filter media and the non-filter media can be formed into a seamless, one-piece component from one or more materials using at least one additive manufacturing technology or process and any suitable additive manufacturing equipment.

[0006] The non-filtering medium may include at least one support structure that allows the EMC fluid filter to be connected to another component.

[0007] The filter structure may include a plurality of fluid flow channels, each fluid flow channel being at least partially defined by a plurality of walls, each fluid flow channel having a first opening located on or near a first side of the filter structure and a second opening located on or near a second side of the filter structure.

[0008] At least one wall of at least one fluid flow channel may include an orifice extending through the wall.

[0009] At least one wall of at least one fluid flow channel may include a plurality of orifices, each orifice extending through the wall.

[0010] At least one wall of at least one fluid flow channel may be: a) Generally flat; or b) Generally uneven.

[0011] The first opening of at least one fluid flow channel may be: a) has a cross-sectional shape substantially the same as that of the second opening of the at least one fluid flow channel; or b) The cross-sectional shape is different from that of the second opening of the at least one fluid flow channel.

[0012] At least a portion of at least one fluid flow channel may extend in a direction relative to the axis of the filter structure, and said at least a portion of said at least one fluid flow channel may: a) Extending in a direction substantially parallel to the axis of the filter structure; or b) Extending in a direction substantially inclined relative to the axis of the filter structure.

[0013] At least a portion of at least one fluid flow channel is torsion about an axis intersecting a first opening and a second opening of the fluid flow channel.

[0014] Each of the plurality of fluid flow channels may be substantially identical, and the plurality of fluid flow channels may form an embedded filter structure.

[0015] The filter structure may include multiple linear elements.

[0016] Each of the plurality of linear elements may extend along a direction relative to an axis intersecting the first side and the second side of the filter structure, and the plurality of linear elements may include: a) at least one linear element extending in a direction substantially parallel to the axis; and / or b) at least one linear element extending in a direction substantially perpendicular to the axis; and / or c) At least one linear element extending in a direction substantially inclined relative to the axis.

[0017] Each of the plurality of linear elements may extend along an axis, and the plurality of linear elements may include: a) at least one linear element extending substantially linearly along the axis; and / or b) At least one linear element that extends substantially nonlinearly along the axis.

[0018] The plurality of linear elements may include: a) at least one linear element having a generally circular cross-sectional profile; and / or b) At least one linear element having a generally non-circular cross-sectional profile.

[0019] The plurality of linear elements of the filter structure can be arranged in a three-dimensional crystal structure.

[0020] The three-dimensional crystal structure can at least partially conform to one or a combination of the following Bravais lattice structures: a) Cubic lattice structure; b) Tetragonal lattice structure; c) Orthorhombic lattice structure; d) Hexagonal lattice structure; e) Trigonal lattice structure; f) Monoclinic lattice structure; and / or g) Triclinic lattice structure.

[0021] At least two linear elements can be connected by wall elements.

[0022] The filter structure can be twisted about an axis intersecting the first side and the second side of the filter structure, and the axis can be: a) Positioned approximately centered relative to the filter structure; or b) The filter structure is positioned substantially off-center from the center.

[0023] The filter medium may include multiple filter structures, each having any of the features described above.

[0024] The EMC fluid filter may further include at least one discharge port, and optionally include a discharge layer for guiding fluid present in the filter medium toward the at least one liquid discharge port, and further optionally, the at least one discharge port, the discharge layer, the support structure and the filter medium may be formed into a seamless, one-piece component from one or more materials.

[0025] The EMC fluid filter may further include at least one protective member that extends over at least a portion of the filter medium, and optionally, the at least one protective member, the support structure, and the filter medium may be formed from one or more materials into a seamless, one-piece component.

[0026] The EMC fluid filter may further include at least one fluid guiding member for changing the direction of fluid flow in the following manner: a) toward the filter medium; and / or b) Passing through the filter medium; and / or c) Exiting the filter medium, and Optionally, the at least one fluid guiding member, support structure, and filter medium can be formed from one or more materials into a seamless, one-piece component.

[0027] According to a second aspect of the invention, we provide an air filtration assembly comprising at least one EMC fluid filter having any of the features described above.

[0028] The EMC fluid filter can be formed as an integral part of at least a portion of the air filtration assembly.

[0029] According to a third aspect of the invention, we provide an aircraft comprising one or more EMC fluid filters, each EMC fluid filter having any of the features described above.

[0030] According to a fourth aspect of the invention, we provide a helicopter comprising one or more EMC fluid filters, each EMC fluid filter having any of the features described above. Attached Figure Description

[0031] To facilitate understanding of this disclosure, preferred embodiments will now be described by way of example only and with reference to the accompanying drawings, in which: Figure 1 This is a front perspective view of an EMC fluid filter according to the present disclosure; Figure 2 This is a perspective view of the filtration structure of an EMC fluid filter according to the present disclosure; Figure 3 yes Figure 2 Side cross-sectional view of the filter structure along the X-plane; Figure 4 This is a perspective view of a portion of the filtration structure of an EMC fluid filter according to the present disclosure; Figure 5 This is a perspective view of a portion of the filtration structure of an EMC fluid filter according to the present disclosure; Figure 6 This is a perspective view of a portion of the filtration structure of an EMC fluid filter according to the present disclosure; Figure 7 This is a perspective view of a portion of the filtration structure of an EMC fluid filter according to the present disclosure; Figure 8 This is a perspective view of a portion of the filtration structure of an EMC fluid filter according to the present disclosure; Figure 9This is a perspective view of a portion of the filtration structure of an EMC fluid filter according to the present disclosure; Figure 10 This is a perspective view of a portion of the filtration structure of an EMC fluid filter according to the present disclosure, with exploded views of various cross sections. Figure 11 This is a perspective view of a portion of the filtration structure of an EMC fluid filter according to the present disclosure; Figure 12 This is a perspective view of a portion of the filtration structure of an EMC fluid filter according to the present disclosure; Figure 13 This is a side cross-sectional view of an EMC fluid filter according to the present disclosure; Figure 14 This is a side cross-sectional view of an EMC fluid filter according to the present disclosure; Figure 15 This is a side cross-sectional view of an EMC fluid filter according to the present disclosure; Figure 16 This is a side cross-sectional view of an EMC fluid filter according to the present disclosure; Figure 17 This is a side cross-sectional view of an EMC fluid filter including a discharge port according to the present disclosure; Figure 18 This is a side cross-sectional view of an EMC fluid filter including an impact layer and a fluid guiding member according to the present disclosure; Figure 19 This is a side cross-sectional view of an EMC fluid filter installed within an existing structure; Figure 20 This is a side cross-sectional view of an EMC fluid filter integrated as part of a pipeline. Figure 21 This is a side cross-sectional view of the EMC fluid filter integrated as part of the front guide shield; Figure 22 This is a side cross-sectional view of the EMC fluid filter integrated as part of the rearward flow guide. Figure 23 This is a side cross-sectional view of an EMC fluid filter integrated as a flush inlet or outlet section; Figure 24 This is a side cross-sectional view of the EMC fluid filter integrated as a dynamic pressure inlet section; Figure 25 This is a side cross-sectional view of the EMC fluid filter integrated as a dynamic pressure inlet section; Figure 26 This is a perspective view of an EMC fluid filter that forms part of the air filtration assembly and is mounted on the surface of an aircraft. Detailed Implementation

[0032] Referring to the accompanying drawings, an EMC fluid filter 10 is shown. The EMC fluid filter 10 includes a filter medium 20 and a non-filter medium 12, which are formed from one or more materials into a seamless, one-piece component. The EMC fluid filter 10 may include other features as described below.

[0033] The EMC fluid filter 10 is configured to be electromagnetically compatible, meaning that the EMC fluid filter 10 can function properly in the electromagnetic environment in which it is intended to operate (i.e., by absorbing electromagnetic radiation). For example, this can include the ability of the EMC fluid filter 10 to limit any unwanted and / or unintentional interactions with nearby electromagnetic energy sources, thereby reducing or eliminating consequences such as electromagnetic interference for nearby components. In some embodiments, the EMC fluid filter 10 may act as a shield or form part of a shield and may suppress or interrupt coupling paths between other nearby components. The EMC fluid filter 10, including any of its components, can be sized and configured according to the specific requirements of the EMC fluid filter 10 in any given application.

[0034] Figure 1 An EMC fluid filter 10 is shown, having a filter medium 20 surrounded by a non-filter medium 12. In some embodiments, the non-filter medium 12 may be or may include at least one or more support structures 13. The non-filter medium 12 may include other components or structures besides the support structures. At least one support structure 13 may at least partially support the filter medium 20 of the EMC fluid filter 10. In embodiments, the support structure 13 or more support structures 13 may at least partially surround the filter medium 20. For example, at least one support structure 13 may be provided as a sleeve, ring, flange, adapter, or otherwise configured to at least partially support the filter medium 20, and in embodiments, to enable the EMC fluid filter 10 and the filter medium 20 to be held in place relative to a body or another component, as described in more detail below, the support structure 13 may be detachably or permanently attached to the body or component. In other embodiments, the support structure 13 may be at least partially disposed inside the filter medium 20. At least a portion of the support structure 13 may occupy space within the volume of the filter medium 20 and may extend through or terminate at a point within the volume of the filter medium 20. For example, the support structure 13 may be a sleeve, ring, flange, adapter, or other suitable support structure that at least partially occupies a portion of the volume of the filter medium 20. Although Figure 1The EMC fluid filter 10 shown is basically cylindrical, but it should be understood that the EMC fluid filter 10 and any of its constituent features or components can be configured to any shape and / or size according to the specific requirements of the EMC fluid filter 10.

[0035] In one embodiment, the support structure 13 or more of the non-filtering media 12 may include mounting features 14, such as eyelets or holes through which rivets, studs, or bolts may pass. The mounting features 14 may be configured as portions or areas of the support structure 13, enabling the support structure 13 to be welded, bonded, joined, or otherwise attached to a body or another component. In other embodiments, the support structure 13 or more of the support structures 13 may be integrally formed with a portion of a body or component from which the EMC fluid filter 10 will be held, such as a portion of an air duct or filter assembly 1100 or a portion of a vehicle or aircraft 1000. In other embodiments, the support structure 13 may be integrally formed such that the EMC fluid filter 10 is held fixed relative to a storage container, a room in a building, an article or protective equipment, or any other suitable body, volume, or component.

[0036] EMC fluid filter 10 includes a filter medium 20. The filter medium 20 includes one or more filter structures 200. Each filter structure 200 allows fluid to flow from a first side 210 to a second side 212 of the filter structure 200. In other words, the filter structure 200 is arranged such that fluid can pass through the filter structure 200 and at least partially through the filter medium 20 comprised of the filter structures 200. In embodiments where the filter medium 20 includes multiple filter structures 200, the filter structures 200 can be arranged relative to each other in any suitable manner according to the specific requirements of the EMC fluid filter 10. In some embodiments, the first filter structure 200a may be arranged to allow fluid to flow from its first side 210a to its second side 212a, and the second side 212a of the first filter structure 200a may be in fluid communication with the first side 210b of the second filter structure 200b, which is arranged to allow fluid to flow from its first side 210b to its second side 212b. In other words, the first and second filter structures 200a and 200b may be arranged such that fluid first passes through the first filter structure 200a and then subsequently through the second filter structure 200b, thereby achieving fluid flow through the filter medium. In other embodiments, the first filter structure 200a and the second filter structure 200b may be arranged such that fluid enters the first side 212b of the second filter structure 200b without first passing through the first filter structure 200a. For example, the first and second filter structures 200a and 200b can be arranged side by side, or one filter structure 200a and 200b can be arranged concentrically, eccentrically, or in other suitable arrangements around the other filter structure 200a and 200b. As discussed in more detail below, the filter structure 200 can be arranged in various configurations.

[0037] Therefore, the EMC fluid filter 10 allows fluid to flow through it. The EMC fluid filter 10 and filter media 20 can be configured to allow various types of fluid flow, or to allow only the desired type of fluid flow while suppressing or blocking the flow of undesired types of fluid (e.g., water). The EMC fluid filter 10 and filter media 20 can be further configured to prevent the flow of various types of solid matter (e.g., but not limited to particulate matter, ice, and debris), or to allow solid matter flow as needed. The solid matter can be suspended in the fluid flowing to the EMC fluid filter 10, or it can be separated from the fluid flowing to the EMC fluid filter 10. In embodiments where the filter media 20 includes multiple filter structures 200, each filter structure 200 can be configured to allow and / or suppress the flow of the same type of fluid and solid matter, or, depending on the specific application requirements of the EMC fluid filter 20, to allow and / or suppress the flow of different types of fluid and solid matter.

[0038] The non-filter media 12 and filter media 20 of the EMC filter 20 are formed from one or more materials and are formed as a seamless, one-piece component. Furthermore, other features of the EMC filter 20, discussed in detail below, may also be formed as part of the same seamless, one-piece component. The seamless, one-piece component has no identifiable joints, transitions, or seams resulting from the manufacturing process. At least all portions of the non-filter media 12 and filter media 20 are parts of a single, continuous structure and form a single body, with no joints, transitions, or seams between any two points of this single body. For example, there are no portions or locations on the component where two or more separate components are welded, joined, combined, bonded, or otherwise connected together.

[0039] The non-filter media 12 and filter media 20 of the EMC filter 10 can be formed into a seamless, monolithic component from one or more materials using any suitable additive manufacturing (AM) technology and process, and using any suitable additive manufacturing equipment. Additive manufacturing technologies and processes include additive layer manufacturing (ALM) processes, which typically involve forming portions (e.g., layers) of an object from selected materials. Some of these processes involve using support or filler materials that can be used to support portions of the object during manufacturing and can subsequently be removed using a variety of known methods to obtain the final product.

[0040] As described above, the EMC fluid filter 10 is electromagnetically compatible and can therefore be formed wholly or partially from at least one material that enables the EMC fluid filter 10 to function properly in the intended electromagnetic environment. Any suitable material or a combination of materials can be selected. Such materials may include, but are not limited to, electromagnetically compatible metallic materials, and may also include conductive carbon-based materials, ceramics, and polymers, and combinations thereof. For the EMC fluid filter 10 formed from at least one metallic material, any suitable AM ​​or ALM process can be used, such as powder bed melting processes including: electron beam melting; direct metal laser sintering; selective heat sintering (SHS); selective laser melting (SLM) and selective laser sintering (SLS), or metal binder spraying processes, or directional energy deposition processes, or any other suitable AM ​​or ALM process. If the EMC filter 10 is to be formed from a non-metallic material as a seamless, one-piece component, any AM or ALM process using said material can be used for formation.

[0041] Forming at least the non-filter media 12 and filter media 20 of the EMC fluid filter 10 into a seamless, one-piece component using any suitable AM ​​or ALM process offers numerous benefits and advantages. Seamless, one-piece components are likely to be more reliable and have a longer service life compared to similar components manufactured using conventional techniques and processes. For example, filters manufactured using conventional techniques may comprise sheets of material formed into a certain shape or contour (e.g., a repeating pattern of hexagonal shaped portions). Multiple sheets of material can then be welded, joined, or bonded together to form a repeating hexagonal pattern to constitute the filter media. The resulting filter media is then welded, joined, or bonded to a support structure. These processes are not only time-consuming and labor-intensive, but each point where the various parts of the filter are welded, joined, or bonded together creates a seam, joint, or transition in the filter that may fail under certain conditions. Failure of a seam, joint, or transition may place additional loads on portions of the component, increasing the likelihood of further failure and potentially negatively impacting the component's performance. In addition, in some cases, such as when the safe operating temperature of any material may be a critical factor, or when a significantly different coefficient of thermal expansion may be undesirable, the use of adhesives or binders may be inappropriate.

[0042] Furthermore, using any suitable AM ​​or ALM process to form at least the non-filter media 12 and filter media 20 of the EMC fluid filter 10 into a seamless, monolithic component means that filter media 20 with complex geometries and / or functions can be manufactured, which is not possible with other processes and technologies. As described in more detail below, filter media 20 with complex and / or variable geometric details throughout can be designed, possessing performance and functional capabilities previously unattainable with conventional fluid filters. A filter media 20 can be designed with a pore or lattice density varying at different locations within the filter media 20, or where the type of filter structure 200 is constructed differently at different locations, for example by twisting or sweeping portions of the filter structure 200. Additional features or components can also be built into the filter media 20 without adding extra manufacturing steps. As just one example, the non-filter media 12 (including at least one support structure 13), filter media 20, and other components of the EMC fluid filter 10 can also be formed as part of a larger assembly (e.g., an air duct or filter assembly 1100 for a delivery tool such as an aircraft 1000).

[0043] Another benefit is that, due to the characteristics of AM and ALM processes, manufacturing EMC fluid filters 10 can reduce waste byproducts. This can reduce the overall cost of manufacturing EMC filters 10, making prototyping cheaper and faster, and may also have environmental benefits due to the reduction in waste byproducts and potentially a lower scrap rate for a batch of EMC fluid filters 10.

[0044] like Figures 2 to 7 As shown, the filter structure 200 of the fluid medium 20 may include a plurality of fluid flow channels 220. Each fluid flow channel 220 may be at least partially defined by a plurality of walls 224, and each fluid flow channel 220 may have a first opening 221 located on or near a first side 210 of the filter structure 200 and a second opening 222 located on or near a second side 212 of the filter structure 200. The fluid flow channels 220 are thus configured such that fluid can enter through the first opening 221, flow through the volume at least partially defined by the plurality of walls 224, and exit through the second opening 222. It should be understood that both the first and second openings 221, 222 can allow fluid to flow in or out, meaning that the EMC fluid filter 10 can operate bidirectionally or unidirectionally depending on the specific requirements of the EMC fluid filter 10.

[0045] Each fluid flow channel 220 has a wall 224 that at least partially defines the fluid flow channel 220. In one embodiment, the fluid flow channel 200 may be configured such that the plurality of walls 224 completely define the fluid flow channel 200. In other embodiments, the fluid flow channel 200 may be partially defined by the plurality of walls 224 and partially by a portion or surface of the non-filter medium 12 that at least partially supports or connects to the fluid medium 20, or it may be partially defined by the walls 224 or any other portion of another fluid structure 200 located near the fluid flow channel 200.

[0046] At least one wall 224 of the fluid flow channel 220 may be configured to be substantially flat. In other words, all or most of the material forming the wall 224 may lie on a single plane, i.e., it may be described as flat or substantially flat. In other embodiments, at least one wall 224 of the fluid flow channel 220 may be configured to be substantially non-flat. The wall 224 may be shaped such that the material forming the wall 224 does not lie on a single plane. The wall 224 may be shaped as a surface comprising a plurality of connected planes, or may be bent such that its shape may be described as monoclinic curvature, co-curvature, anti-curvature, or variable curvature, or arranged in any other suitable manner in which the material forming the wall 224 does not lie on a single plane. In embodiments, the fluid flow channel 220 may include a variety of wall 224 configurations, such as having at least one substantially flat wall 224 and at least one substantially non-flat wall 224.

[0047] As described above, each fluid flow channel 220 may have a first opening 221 and a second opening 222. The first opening 221 and the second opening 222 may each have a cross-sectional shape or profile at least partially defined by the wall 224 of the fluid flow channel 224. Figures 2 to 7 As shown, the cross-sectional shape or profile of the first opening 221 and the second opening 222 may be hexagonal. It should be understood that, in embodiments, the first opening 221 and / or the second opening 222 may have any suitable shape or profile. In embodiments, the cross-sectional shape of the first opening 221 may be the same as or substantially similar to the cross-sectional shape of the second opening 222. In such embodiments, the cross-sectional shape may be constant or substantially constant throughout the fluid flow channel 200. In other embodiments, the cross-sectional shape may not be constant throughout the fluid flow channel 200. For example, the first opening 221 and the second opening 222 may be the same shape, but the shape may change at a distance along the fluid flow channel 200 from either opening. Such shape changes may include changing from one geometry to another, such as from a hexagon to a quadrilateral, and / or may also include changing characteristic dimensions of the cross-sectional shape, such as width or diameter, and / or changing the direction of rotation of the cross-sectional shape. The cross-sectional shape of the fluid flow channel 220 may vary at multiple locations along the fluid flow channel 200. In other embodiments, the cross-sectional shape or profile of the first opening 221 of the fluid flow channel 220 may differ from the cross-sectional shape or profile of the second opening 222. For example... Figure 7 As shown, the first opening 221 of the fluid flow channel 220 may have a cross-sectional profile with a first area A1. The second opening 222 of the fluid flow channel 220 may have a cross-sectional profile with a second area A2, which is different from the first area A1. In embodiments, the cross-sectional shape or profile may vary in any relevant aspect, such as geometry, feature size, orientation, or in any other way.

[0048] like Figure 4 and Figure 5 As shown, at least one fluid flow channel 220 of the filter structure 200 may include at least one orifice 226 extending through the wall 224 of the fluid flow channel 220. Figure 4As shown, the fluid flow channel 220 may have multiple orifices 226, each orifice 226 located on a separate wall 224 of the fluid flow channel 226. The orifice or multiple orifices 226 may be of any desired shape and / or size, depending on the specific application of the EMC filter 10. For example, the orifice or multiple orifices 226 may allow the passage of one or a selected type of fluid or solid substance, but may block the passage of one or more different types of fluid or solid. This arrangement may allow a certain type of substance to change direction as it passes through the EMC filter 10. The fluid flow channel 220 of the filter structure 200 may include at least one orifice 226 having one configuration and at least one orifice 226 having another configuration. For example, as needed, the fluid flow channel 220 may include one orifice 226 having a specific size and / or shape and / or location, and another orifice 226 having a different size and / or shape and / or location.

[0049] like Figure 5 As shown, the wall 224 of the fluid flow channel 220 may include a plurality of orifices 226. The plurality of orifices 226 may be implemented as a perforated portion of the wall 224 comprising a plurality of orifices 226. Each orifice 226 within the perforated portion of the wall 224 may have substantially the same size and / or shape, or the perforated portion may include orifices 226 with different sizes and / or shapes. The plurality of orifices 226 may be arranged in any suitable configuration or pattern as needed. The fluid flow channel 220 may include only one wall 224 with a plurality of orifices 226, or include multiple walls 224 with a plurality of orifices 226, or any combination of a wall with one orifice 226 and a wall with a plurality of orifices 226. Similar to those described above, these different configurations enhance the possible functionality of the filter structure 200.

[0050] like Figure 6 As shown, the fluid flow channel 220 may extend along the direction of axis B. Axis B may intersect the region of the first opening 221 and the region of the second opening 222. In some embodiments, the fluid flow channel 220 may be twisted or otherwise swept about axis B. The fluid flow channel 220 may have a first opening 221 and a second opening 222 having similar or identical cross-sectional shapes or profiles that twist as the fluid flow channel 220 extends along the direction or axis B. In other embodiments, the fluid flow channel 220 may have a first opening 221 and a second opening 222 having different cross-sectional shapes or profiles that twist as the fluid flow channel 220 extends along the direction or axis B. The torsional characteristics of the fluid flow channel 220 can be selected according to the specific requirements of the EMC filter 10 and can improve the performance and functionality of the EMC filter 10.

[0051] At least a portion or all of the fluid flow channel 220 may extend along the axis A of the filter structure 200, which may be an axis intersecting the region of the first side 211 and the region of the second side 212 of the filter structure 200. In embodiments, at least a portion of the fluid flow channel 220 may extend in a direction parallel or substantially parallel to the axis A of the filter structure 200. In other embodiments, at least a portion of the fluid flow channel 220 may extend in a direction substantially inclined relative to the axis A of the filter structure 200. The orientation of at least a portion or all of the fluid flow channel 220 relative to the axis A of the filter structure 200 can be selected according to the specific requirements of the EMC filter 10 and can enhance the performance and functionality of the EMC filter 10. For example, a fluid flow channel 220 extending in a direction inclined relative to axis A can allow for finer control of the direction of fluid flowing through the filter structure 200.

[0052] In embodiments, the filter structure 200 may include a plurality of identical or substantially identical fluid flow channels 220, differing only in manufacturing tolerances and capabilities of the equipment used to form the fluid flow channels 220. Figures 2 to 4 As shown, multiple fluid flow channels 220 can be arranged to form an embedded filter structure 200. In other embodiments, the filter structure 200 may include multiple fluid flow channels 220, which include different combinations of any of the features of the fluid flow channels 220 described above.

[0053] refer to Figures 8 to 12The filter structure 200 may include a plurality of linear elements 232. Each of the plurality of linear elements 232 extends along a direction relative to an axis A that intersects a first side 210 of the fluid structure 200 and a second side 212 of the filter structure 200. In embodiments, at least one or more linear elements 232 of the filter structure 200 may extend in a direction parallel or substantially parallel to the axis A of the filter structure 200. In other embodiments, at least one or more linear elements 232 of the filter structure 200 may extend in a direction perpendicular or substantially perpendicular to the axis A of the filter structure 200. In still other embodiments, at least one or more linear elements 232 of the filter structure 200 may extend in a direction inclined or substantially inclined to the axis A of the filter structure 200. In embodiments of the filter structure 200 including a plurality of linear elements 232, the filter structure 200 may include linear elements 232 all extending in the same direction, for example, they may all extend in a direction substantially parallel to the axis A of the filter structure 200. In other embodiments, the filter structure 200 may include any combination of the plurality of linear elements extending in the aforementioned direction. For example, the plurality of linear elements 232 may extend in a direction substantially parallel to the axis A of the filter structure 200, and the plurality of linear elements 232 may extend in a direction substantially perpendicular to the axis A of the filter structure 200.

[0054] In one embodiment, any one of the plurality of linear elements 232 may be connected to a portion of the non-filtering medium 12, which may include one or more support structures 13. Furthermore, in another embodiment, any one of the plurality of linear elements 232 may be connected to another of the plurality of linear elements 232, which may result in the formation of a lattice structure 230 that may form at least a portion of the filter structure 200. In such an embodiment, at least a portion of one linear element 232 may at least partially pass through at least a portion of another linear element 232, such that the two linear elements 232 are connected. A linear element 232 may be connected to a plurality of linear elements 232 in this manner, and may also be connected to the non-filtering medium as described above. In other embodiments, each linear element 232 that may be connected to another one or more linear elements may be connected to a common node element 234. Figures 8 to 12 In the diagram, node element 234 is shown as a basic sphere, but it should be understood that node element 234 can be formed in any suitable shape so that line elements 232 can be connected together, and node elements 234 of different shapes and sizes can be combined in a lattice structure 230 according to the specific requirements of the filter structure 200, which at least forms a part of the filter structure 200.

[0055] refer to Figure 11 Each linear element 232 extends in a direction relative to the linear element axis C. In embodiments, at least a portion of at least one linear element 232 may extend substantially linearly along the linear element axis C, meaning it does not significantly bend or otherwise deviate from the linear element axis C. In other words, the linear element 232 or a portion thereof may extend in a straight line. In other embodiments, at least one linear element 232 may extend non-linearly relative to the linear element axis C. For example, at least a portion of the linear element 232 may be curved or may be otherwise shaped such that at least a portion of the linear element 232 deviates from the axis C. It should be understood that the lattice structure 230 of the filter structure 200 may have any combination of the linear elements 232 as described above, such as... Figure 11 The combination shown is of multiple linearly extended linear elements 232 and multiple non-linearly extended linear elements 232.

[0056] refer to Figure 10 Each linear element 232 has a cross-sectional shape or profile. In one embodiment, at least one of the linear elements 232 may have a substantially circular cross-sectional shape or profile. In other embodiments, at least one of the linear elements 232 may have a non-circular cross-sectional shape or profile. Figure 10 Examples of non-circular profiles are shown, but it should be understood that the linear element 232 can have any suitable shape or profile depending on the specific requirements of the EMC filter 10. In some embodiments, the cross-sectional shape or profile of the linear element 232 can be substantially constant throughout the linear element 232. In other embodiments, the cross-sectional shape or profile of the linear element 232 may not be consistent throughout the linear element 232 or at least a portion thereof. In some embodiments, the filter structure 200 may include a plurality of linear elements 232 having the same cross-sectional shape or profile, or in other embodiments, the filter structure 200 may include a plurality of linear elements 232 having different cross-sectional shapes or profiles present in any suitable combination.

[0057] refer to Figure 12 At least two of the multiple linear elements 232 can be connected via wall elements 236. The filter structure 200 may include multiple wall elements 236. For example... Figure 12As shown, wall element 236 can be configured to connect its entire periphery to a plurality of linear elements 232. In other words, wall element 236 can form a surface that completely occupies or spans the area or space extending between the plurality of linear elements 232. In other embodiments, wall element 236 can be configured to connect only a portion of its periphery to the linear elements 232 or the plurality of linear elements 232, while the remaining portion of its periphery is not connected to the linear elements 232. In such embodiments, wall element can form a surface that only partially occupies or spans the area or space extending between the plurality of linear elements 232. At least one wall element 236 of filter structure 200 can be substantially flat, such that it is substantially flat. In other embodiments, at least one wall element 236 of filter structure can be substantially non-flat and can be shaped to include a plurality of connected planar surfaces, or can be bent such that its shape can be described as monoclinic curvature, unidirectional curvature, anti-directional curvature, or variable curvature, or arranged in any other suitable manner, wherein the material forming wall element 226 is not located on a single plane. In embodiments, the lattice structure 230 may include a variety of wall element 226 configurations, such as having at least one substantially flat wall element 226 and at least one substantially non-flat wall element 226. The aforementioned wall elements 236 may be arranged to enhance the performance of the filter structure 200. For example, they may allow fluid flowing through the filter structure 200 to change direction, or they may be used to separate a fluid flow into separate flows that may be directed in different directions, or they may enable the separation of two or more types of fluid or solid substances.

[0058] As described above, the plurality of linear elements 232 of the filter structure 200 can be arranged to form a lattice structure 230, and each linear element 232 can be configured as described above and connected to other linear elements 232 or to the non-filter medium 12 as described above. In an embodiment, as Figures 8 to 12As shown, at least a portion of the lattice structure 230 can be formed as a three-dimensional crystal structure. The lattice structure 230 may include substantially identical linear elements 232, or may include any combination of linear elements 232 as described above. The lattice structure 230 of the fluid structure 230 may be at least partially formed as one or any combination of Bravais lattice structures known in the art. These Bravais lattice structures may include (where appropriate) simple, bottom-centered, body-centered, and face-centered variants of the following structures: cubic lattice structure; tetragonal lattice structure; orthorhombic lattice structure; hexagonal lattice structure; trigonal lattice structure; monoclinic lattice structure; and triclinic lattice structure. Depending on the specific requirements of the EMC fluid filter 10, the lattice structure 230 may include any number and combination of three-dimensional crystal structures. In embodiments, the filter structure 200 may include a plurality of linear elements 232 comprising different combinations of any of the features or arrangements described above, and may be formed as lattice structure 230 or multiple lattice structures arranged in any combination of the above-described arrangements.

[0059] refer to Figure 13 and Figure 14 The filter structure 200, formed by the plurality of fluid flow channels 220 or the plurality of linear elements 232 as described above, can be twisted or otherwise swept about an axis A intersecting the first side 210 and the second side 212 of the filter structure 200. In an embodiment, only a portion of the filter structure 200 can be twisted or otherwise swept about axis A of the filter structure 200. This can be any part or multiple parts of the filter structure 200. Figure 13 In the illustrated embodiment, the entire filter structure 200 can be twisted or otherwise swept around axis A of the filter structure 200. Similarly, as... Figure 13 As shown, axis A can be positioned substantially centrally relative to filter structure 200, such that torsion or sweeping of filter structure 200 occurs around or near the center of filter structure 200. In other embodiments, axis A of filter structure 200 can be positioned substantially off-center relative to filter structure 200, such that torsion or sweeping of filter structure 200 occurs around a position on filter structure 200 that is not at the center of filter structure 200 but off-center.

[0060] As described above, the filter medium 20 may include a plurality of filter structures 200. Each of these filter structures 200 may differ in any combination of the aforementioned features, including a plurality of fluid flow channels 220 or a plurality of linear elements 232. Each of these filter structures 200 may be arranged in any suitable layout or arrangement relative to the other filter structures 200 forming the filter medium 20. For example, Figure 15An EMC filter 10 is shown, wherein a first filter structure 200a is positioned such that its first side 210a at least partially forms the outer surface or face of the filter medium 20. The first filter structure 200a may be formed by a plurality of fluid flow channels 220 or a plurality of linear elements 232 as described above. The filter medium 20 may also include a second filter structure 200b, which is positioned such that its second side 212b at least partially forms the outer surface or face of the filter medium 20. In this example, the second side 212a of the first filter structure 200a and the first side 210b of the second filter structure 200b are positioned adjacent to or substantially in contact with each other and are in fluid communication with each other to allow fluid, or only desired fluid, to pass through the EMC filter 10. Figure 16Another example of an EMC filter 10 is shown, wherein a first filter structure 200a is radially surrounded by a second filter structure 200b. In other words, the second filter structure 200b concentrically surrounds the first filter structure 200a. In the example shown, the first side 210a of the first filter structure 200a and the first side 210b of the second filter structure 200b are positioned such that they lie on a common plane, and the second side 212a of the first filter structure 200a and the second side 212b of the second filter structure 200b are positioned such that they also lie on a common plane. However, it should be understood that the filter structures 200a, 200b may have different relative dimensions, meaning that the first side 210a, 210b and / or the second side 212a, 212b of each filter structure 200a, 200b may not lie on a common plane. Therefore, depending on the relative positioning of the first sides 210a, 210b and / or the second sides 212a, 212b, and additionally depending on the number of arranged filter structures 200, the filter medium 20 may have a stepped or staggered structure or appearance. It should also be understood that each individual filter structure 200 may be shaped in any suitable manner, depending on the specific requirements of the EMC filter 10. For example, in embodiments, the filter structure 200 may be formed as a generally prismatic three-dimensional shape or polyhedron, such as a disk, cylinder, cube, cuboid, or any other prismatic three-dimensional shape or polyhedron. In other embodiments, the filter structure 200 may be formed as a non-prismatic three-dimensional shape or polyhedron, such as a frustum-shaped filter structure, a spherical filter structure, a frustum-shaped pyramidal filter structure, or any other non-prismatic three-dimensional shape or polyhedron. Furthermore, in further embodiments, the filter structure 200 may be at least partially formed to have portions recessed from the filter structure 200 and / or portions protruding from the filter structure 200. For example, portions of the filter structure 200 may be crenellated (barrel-like, serrated). These portions may be included within the filter structure 200 to allow the EMC fluid filter 10 to at least partially accommodate other components. For example, in an air duct or filtration system 1100, it may be desirable for the EMC fluid filter 10 to partially accommodate portions of electrical equipment (e.g., electric fans, light sources, or communication equipment).

[0061] Figure 17An embodiment of an EMC fluid filter 10 including at least one outlet 300 is shown. The outlet 300 may be formed as part of the non-filter media 12, part of one or more support structures 13, or may be provided as a separate component that may be permanently or detachably connected to a portion of the EMC fluid filter 10. In some embodiments, at least one outlet 300 may be formed as a seamless, integral component with the filter media 20 and the non-filter media 12 from one or more materials. At least one outlet 300 may be located on any portion of the EMC fluid filter 10 and may be appropriately sized according to the specific requirements of the EMC fluid filter 10. In embodiments, the EMC fluid filter 10 may also include an outlet layer 302. The outlet layer 302 may be provided as a combined filter structure 200 or multiple filter structures 200 including any of the features described above. For example, the outlet layer 302 may be a first filter structure 200a that allows liquids (e.g., water) to flow through it. A second filter structure 200b may be disposed near the first filter structure 200a, which may allow air to flow through but not liquids (e.g., water). The first filter structure 200a may include features capable of directing liquid (e.g., water) to one or more outlets 300. In some embodiments, the outlet layer 302 may be formed separately from the EMC fluid filter 10 and may be permanently or detachably attached to a portion of the EMC fluid filter 10. In other embodiments, the outlet layer 302 may be formed together with the filter media 20 and the non-filter media 12 from one or more materials as a seamless, integral component. At least one outlet layer 302 may be disposed on any portion of the EMC fluid filter 10 and may be appropriately sized according to the specific requirements of the EMC fluid filter 10.

[0062] Figure 18An embodiment of an EMC fluid filter 10 including at least one protective member 400 and at least one fluid guiding member 500 is shown. The at least one protective member 400 may extend or otherwise be positioned over at least a portion of the filter medium 20 and may be formed, for example, of a shock-resistant, shock-absorbing, or sacrificial material. In use, it can protect the filter structure 20 or any portion of the EMC fluid filter 10 from potential sources of damage. The at least one protective member 400 may be formed to allow fluid flow through it, and thus may be formed as a filter structure 200 including any of the features described above. In other embodiments, it may be configured to prevent the passage of selected fluid or solid matter or any substance. For example, the protective member 400 may partially cover the filter medium 20, and the filter medium 20 may have a fluid structure 200 that allows fluid to flow through its exposed portions, and fluid may be able to flow beneath the protective member 400 by any suitable combination including any of the features of the fluid structure 200 described above. In some embodiments, the protective member 400 may be formed separately from the EMC fluid filter 10 and may be permanently or detachably attached to portions of the EMC fluid filter 10. In other embodiments, the protective member 400 may be formed as a seamless, integral component together with the filter medium 20 and the non-filter medium 12 from one or more materials. At least one protective member 400 may be disposed on any part of the EMC fluid filter 10 and may be appropriately sized according to the specific requirements of the EMC fluid filter 10, and may be included on the EMC fluid filter 10 which also includes at least one outlet 300 and at least one outlet layer 302 as described above.

[0063] In an embodiment, such as Figure 18 As shown, the EMC fluid filter 10 may include at least one fluid guiding member 500, which, during use, can change or guide the flow direction of fluid toward, through, and / or away from the fluid medium 20. Depending on the specific requirements of the EMC fluid filter 10, at least one fluid guiding member 500 may be optimally shaped and sized to guide the fluid in a specific direction. Figure 18In the example shown, multiple fluid guiding members 500 are positioned to extend beyond the filter structure 200a and into the environment surrounding the EMC fluid filter 10. Therefore, fluid flow from the external environment can be directed toward the filter medium 20. The multiple fluid guiding members 500 also extend into the filter structure 200a, meaning they can also guide fluid flow through portions of the filter medium 20. In other embodiments, at least one fluid guiding member 500 may be configured to extend completely through the filter medium 20, or not through the filter medium 20 at all. In some embodiments, at least one fluid guiding member 500 may be formed separately from the EMC fluid filter 10 and may be permanently or detachably attached to any portion of the EMC fluid filter 10. In other embodiments, at least one fluid guiding member 500 may be formed together with the filter medium 20 and the non-filter medium 12 from one or more materials as a seamless, one-piece component. At least one fluid guiding member 500 may be disposed on any part of the EMC fluid filter 10 and may be appropriately sized according to the specific requirements of the EMC fluid filter 10, and may be included on the EMC fluid filter 10 which also includes at least one discharge port 300 and at least one discharge layer 302 as described above, and / or at least one protective member 400.

[0064] like Figures 19 to 26 As shown, the EMC fluid filter 10 can be provided as part of the air filtration assembly 1100, enabling the EMC fluid filter 10 to provide filtration and ventilation for portions of the space volume that may be occupied by people, animals, or goods. For example, the air filtration assembly 1100 can be located in, for example... Figure 26 The helicopter is shown on a vehicle 1000. The vehicle 1000 may include a single air filter assembly 1100 and / or an EMC fluid filter 10, or may include multiple air filter assemblies 1100 and / or multiple EMC fluid filters 10. In other embodiments, the EMC fluid filter 10 may be provided as part of the air filter assembly 1100, enabling the EMC fluid filter 10 to provide filtration and ventilation for portions of a spatial volume such as a storage container, a room in a building, or may be provided as part of an article or protective equipment, or any other suitable body, volume, or component. In other embodiments, the air filter assembly 1100 may include multiple EMC fluid filters 10.

[0065] Figure 19An EMC fluid filter 10 is shown, provided as an insert, allowing it to be permanently or detachably attached to portions of an existing structure, such as an air filter assembly 1100. In one embodiment, the EMC fluid filter 10 can be inserted into an orifice provided in a portion or component of the air filter assembly 1100 and can be secured in place using multiple fasteners, such as multiple bolts. In other embodiments, the EMC fluid filter 10 can be inserted into an orifice provided in a portion or component of the air filter assembly 1100 and can be welded, bonded, or adhesiveed to that portion or component. The air filter assembly 1100 can be formed as part of an aircraft 1000 (e.g., a helicopter or tiltrotor aircraft, or any other suitable aircraft 1000). Figure 20 As shown, the EMC fluid filter 10 can be provided as part of the EMC air filter assembly 1100, which forms part of a duct and can provide fluid flow filtration and / or ventilation to parts of the aircraft 1000, or discharge fluid from parts of the aircraft 1000. Figure 21 An EMC fluid filter 10 is shown, which can be provided as part of an air filter assembly 1100 that forms part of the front scoop of an aircraft 1000. Figure 22 An EMC fluid filter 10 is shown, which can be provided as part of an air filter assembly 1100 that forms part of the rear fairing of an aircraft 1000. Figure 23 An EMC fluid filter 10 is shown, which can be provided as part of an air filter assembly 1100 that forms part of a flush inlet or outlet of an aircraft 1000. Figure 24 An EMC fluid filter 10 is shown, which can be provided as part of an air filter assembly 1100 that forms part of the dynamic pressure inlet of an aircraft 1000. Figure 25 An EMC fluid filter 10 is shown, which can be provided as part of an air filtration assembly 1100 that forms part of the dynamic pressure outlet of an aircraft 1000. In any application of the EMC fluid filter 10 described above, the EMC fluid filter 10 can be formed as an integral part of the air filtration assembly 1000. For example, the EMC fluid filter 10 and at least a portion of the air filtration assembly 1100 can be formed from one or more materials into a seamless, one-piece component using any suitable AM ​​or ALM process or technology as described above.

[0066] refer to Figure 26The air filter assembly 1100 may include a body or component that can serve as a deflector or fairing to direct fluid flow to the EMC fluid filter 10 and protect the EMC fluid filter 10 from potential external sources of damage. The EMC fluid filter 10 may be permanently or detachably connected to a portion of the air filter assembly 1100, or may be an integral component formed as at least a portion of the air filter assembly 1100. For example, in some embodiments, the non-filtering medium 12 may include a portion of the air filter assembly 1100, such that a portion of the air filter assembly 1100 may be a support structure 13. The air filter assembly 1100 may include features that enable it to be permanently or detachably connected to a portion of the aircraft 1000 (e.g., a helicopter or any other suitable aircraft). Depending on the specific requirements of the aircraft 1000, the interconnection between the air filter assembly 1100 and the EMC fluid filter 10 may be arranged as needed. In embodiments, the non-filtering medium 12 of the EMC fluid filter 10 may include at least one mounting feature 14 that enables the EMC fluid filter 10 to be connected to a portion of the air filter assembly 1100. Therefore, the EMC fluid filter 10 can be removed from the air filter assembly as a separable component for inspection, maintenance, and / or replacement. In other embodiments, the EMC fluid filter 10 can be formed as an integral part of at least a portion of the air filter assembly 1100, such that the entire air filter assembly 1100 (including the EMC fluid filter 10) can be attached to and removed from the aircraft 1000 as a single component. This can reduce the complexity of assembling the aircraft 1000 and / or increase the assembly speed, or may be beneficial from a maintenance perspective as it may not require disassembling multiple components to access portions of the air filter assembly 1100. Furthermore, an AM or ALM technology can therefore be used to manufacture the air filter assembly 1100 or at least a portion thereof, which can significantly reduce waste byproducts and scrap, and reduce the time required to manufacture the air filter assembly 1100.

[0067] When used in this specification and claims, the term "comprising" and its variations mean that the specified feature, step, or whole is included. These terms should not be construed as excluding the presence of other features, steps, or components.

[0068] The invention may also broadly include portions, elements, steps, examples, and / or features mentioned or indicated individually or collectively in this specification, as well as any and all combinations of two or more of said portions, elements, steps, examples, and / or features. In particular, one or more features in any embodiment described herein may be combined with one or more features in any other embodiment described herein.

[0069] Protection may be sought against any feature disclosed in any one or more of the public documents cited herein, in combination with the content of this disclosure.

[0070] Although certain exemplary embodiments of the invention have been described, the scope of the appended claims is not intended to be limited to these embodiments. The claims should be interpreted literally, in their intended meaning, and / or including equivalents.

Claims

1. An EMC fluid filter, comprising: A filter medium having a filter structure that allows fluid to flow from a first side of the filter structure to a second side of the filter structure; A non-filtering medium connected to the filter medium; as well as The filter medium and the non-filter medium are formed into a seamless, one-piece component by one or more materials.

2. The EMC fluid filter according to claim 1, wherein, The non-filtering medium includes at least one support structure that allows the EMC fluid filter to be connected to another component.

3. The EMC fluid filter according to claim 1 or claim 2, wherein, The filter structure includes a plurality of fluid flow channels, each fluid flow channel being at least partially defined by a plurality of walls, each fluid flow channel having a first opening located on or near a first side of the filter structure and a second opening located on or near a second side of the filter structure.

4. The EMC fluid filter according to claim 3, wherein, At least one wall of at least one fluid flow channel includes an orifice extending through the wall.

5. The EMC fluid filter according to claim 3 or 4, wherein, At least one wall of the at least one fluid flow channel includes a plurality of orifices, each orifice extending through the wall.

6. The EMC fluid filter according to any one of claims 3 to 5, wherein, At least one wall of at least one fluid flow channel is: a) Generally flat; or b) Generally uneven.

7. The EMC fluid filter according to any one of claims 3 to 6, wherein, The first opening of the at least one fluid flow channel is: a) has a cross-sectional shape substantially the same as the second opening of the at least one fluid flow channel; or b) The cross-sectional shape of the second opening is different from that of the at least one fluid flow channel.

8. The EMC fluid filter according to any one of claims 3 to 7, wherein, At least a portion of at least one fluid flow channel extends in a direction relative to the axis of the filter structure, and wherein at least a portion of the at least one fluid flow channel: a) Extending in a direction substantially parallel to the axis of the filter structure; or b) Extending in a direction substantially inclined relative to the axis of the filter structure.

9. The EMC fluid filter according to any one of claims 3 to 8, wherein, At least a portion of at least one fluid flow channel is twisted about an axis intersecting a first opening and a second opening of the fluid flow channel.

10. The EMC fluid filter according to any one of claims 3 to 9, wherein, Each of the plurality of fluid flow channels is substantially identical, and the plurality of fluid flow channels form an embedded filter structure.

11. The EMC fluid filter according to any one of the preceding claims, wherein, The filter structure includes multiple linear elements.

12. The EMC fluid filter according to claim 11, wherein, Each of the plurality of linear elements extends along a direction relative to an axis intersecting the first side and the second side of the filter structure, the plurality of linear elements comprising: a) at least one linear element extending in a direction substantially parallel to the axis; and / or b) at least one linear element extending in a direction substantially perpendicular to the axis; and / or c) At least one linear element extending in a direction substantially inclined relative to the axis.

13. The EMC fluid filter according to claim 11 or 12, wherein, The plurality of linear elements each extend along an axis, and the plurality of linear elements include: a) at least one linear element extending substantially linearly along the axis; and / or b) At least one linear element that extends substantially nonlinearly along the axis.

14. The EMC fluid filter according to any one of claims 11 to 13, wherein, The plurality of linear elements include: a) at least one linear element having a generally circular cross-sectional profile; and / or b) At least one linear element having a generally non-circular cross-sectional profile.

15. The EMC fluid filter according to any one of claims 11 to 14, wherein, The filter structure has multiple linear elements arranged in a three-dimensional crystal structure.

16. The EMC fluid filter according to claim 15, wherein, The three-dimensional crystal structure is at least partially formed as one or a combination of the following Bravais lattice structures: a) Cubic lattice structure; b) Tetragonal lattice structure; c) Orthorhombic lattice structure; d) Hexagonal lattice structure; e) Trigonal lattice structure; f) Monoclinic lattice structure; and / or g) Triclinic lattice structure.

17. The EMC fluid filter according to any one of claims 11 to 16, wherein, At least two linear elements are connected by wall elements.

18. The EMC fluid filter according to any of the preceding claims, wherein, The filter structure is twisted about an axis intersecting the first side and the second side of the filter structure, and wherein the axis is: a) Positioned approximately centered relative to the filter structure; or b) The filter structure is positioned substantially off-center from the center.

19. The EMC fluid filter according to any of the preceding claims, wherein, The filter medium includes multiple filter structures, each of which conforms to any of the preceding claims.

20. The EMC fluid filter according to any of the preceding claims, further comprising at least one discharge port, and optionally including a discharge layer for guiding fluid present in the filter medium to the at least one liquid discharge port, and further optionally, wherein the at least one discharge port, the discharge layer, the support structure and the filter medium are formed together by one or more materials into a seamless, one-piece component.

21. The EMC fluid filter according to any of the preceding claims, further comprising at least one protective member extending over at least a portion of the filter medium, and optionally, wherein the at least one protective member, the support structure, and the filter medium are formed together by one or more materials as a seamless, one-piece component.

22. The EMC fluid filter according to any of the preceding claims, further comprising at least one fluid guiding member for changing the direction of fluid flow in such a way as: a) toward the filter medium; and / or b) Passing through the filter medium; and / or c) Exiting the filter medium, and Optionally, the at least one fluid guiding member, the support structure, and the filter medium are formed from one or more materials into a seamless, one-piece component.

23. An air filtration assembly comprising at least one EMC fluid filter according to any of the preceding claims.

24. The air filter assembly according to claim 23, wherein, The EMC fluid filter is formed as an integral component of at least a portion of the air filtration assembly.

25. An aircraft comprising one or more EMC fluid filters, each EMC fluid filter conforming to any of the preceding claims.

26. A helicopter comprising one or more EMC fluid filters, each EMC fluid filter conforming to any of the preceding claims.

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