Abstract: The present invention relates to a thermally bonded biodegradable filter support and a biodegradable composite filter media for an air filter and a mask using the same. More particularly, the present invention relates to an environmentally-friendly dry nonwoven fabric or thermally bonded biodegradable filter support and a biodegradable composite filter media for air filters, which biodegrade under soil burial conditions when disposed of after reaching the end of their lifespan.

Abstract: The invention relates to a method for producing a zigzag-folded nonwoven material for a filter, wherein the nonwoven material is produced by a melt-spinning process, comprising the following work steps: folding the nonwoven material by means of a folding device, whereby a plurality of folds results, wherein the folds divide the nonwoven material into first limbs and second limbs such that the nonwoven material is folded in zigzag form; and subsequently welding a weld region of the first limb of a fold to at least one weld region of the second limb of a fold by means of a thermal-contact welding process, wherein a welded joint is formed between the two facing sides of the limbs of a fold. The invention furthermore relates to a corresponding apparatus and a corresponding nonwoven material.

Abstract: A water separator for use in an environmental control system of an aircraft includes a coalescing channel having a curved housing. The coalescing channel has a hollow interior. A coalescing insert is arranged within the hollow interior of the coalescing channel. The coalescing insert has an upstream end, a downstream end, and plurality of fluidly distinct flow channels extending between the upstream end and the downstream end such that the plurality of fluidly distinct flow channels receive a flow of medium in parallel.

Abstract: A polymer aerogel monolith comprising a polymer aerogel having a nitrogen content of greater than seven weight percent impregnated into a mesh. A method of manufacturing an amine-containing polymer aerogel monolith, includes combining a vinyl-containing cross-linking monomer, a vinyl-containing functional monomer, an organic solvent, and a radical initiator into a liquid mixture, applying the liquid mixture to a mesh fabric to produce a monomer-impregnated mesh, heating the monomer-impregnated mesh to produce a polymer aerogel monolith, washing the polymer aerogel monolith with acid to produce an ammonium-containing polymer aerogel monolith, and applying a base to neutralize the ammonium-containing polymer aerogel monolith to produce an amine-containing polymer aerogel monolith.

Abstract: A cartridge filter including a plurality of filter media sets, wherein two of the plurality of filter media sets are arranged in a V-shaped manner, and a frame for receiving the filter media sets. The frame is formed by four elements which are each configured in one piece: an inflow-side upper plate, an outflow-side base plate and two side plates.

Abstract: The present development is a nanofilter, i.e. a filter material that comprises inorganic nanowires impregnated into a non-woven polymer or cloth fabric material. The nanofilter comprises a fabric infiltrated with a nanowire powder slurry selected from anatase titania (TiO2), zinc oxide (ZnO), silica, tin oxide, alumina (Al2O3), or combinations thereof. Exemplary fabrics include a non-woven polymer and a cotton fabric cloth. The nanowire powder slurry effectively produces a coating on the fabric. Optionally, the nanowires may be functionalized using nanoparticles and/or disinfecting salt particles. The infiltrated nanowires form a porous network with sub-micron scale openings and provide filtration of any airborne particles, liquid droplets and viruses including COVID 19. The nanofilter may be used in a variety of applications, such as a nanofilter respirator as described herein.

Abstract: An air cleaner assembly for filtering intake air for a power plant can include a filter cartridge disposed within a housing of the air cleaner assembly, a precleaner assembly including at least one particle separator for separating particulates from an airflow stream and a scavenge port for discharging the separated particulates, the precleaner assembly being located upstream of the filter cartridge, a scavenge system for evacuating the separated particulates out of the scavenge port, the scavenge system including an electric motor coupled to an fan, an input sensor generating an input signal relating to a parameter associated with one or more of the precleaner assembly, the air cleaner assembly, a power plant receiving air from the air cleaner assembly, and a vehicle associated with the power plant, and a controller for operating the speed of the scavenge system based on the input signal from the input sensor.

Abstract: Device for drying compressed gas having at least two vessels containing a regenerable drying agent and an controllable valve system with a first valve block and a second valve block. The device is further provided with a first regeneration line with heating means and a second regeneration line for discharging saturated regeneration gas. The regeneration lines are connected to a different valve block, wherein in the first regeneration line between a blow-off opening or blower and the heating means an additional vessel with a regenerable drying agent is incorporated.

Abstract: Air cleaner assemblies, components, and features are described. The features can be used to provide that the air cleaner assembly cannot be fully closed, even if a cartridge is nested therein, and appears to be sealed, unless that cartridge is a proper one for the system of concern. The effect is to prevent an inappropriate cartridge, that does not properly seal, from being inadvertently installed in the assembly.

Abstract: An evaporative cooling pad for an air treatment unit includes a first set of corrugated sheets and a second set of corrugated sheets having corrugations defined in a direction transversely of a horizontal plane of the pad, the sheets of the first set being disposed alternatively with the sheets of the second set, with the corrugations of the first set crossing the corrugations of the second set; the crossed corrugations defining passageways penetrating from a first edge to a second edge of the pad, the corrugations of the corrugated sheets bearing against one another so that the sheets touch where at least one of the wave peaks (p1) and wave troughs (t1, t2) of their respective corrugations cross; at least one wave peak (p2) between two wave peaks (p1) of equal amplitude (a1) of at least one of the first and second set of corrugated sheets has a smaller amplitude (a2) than the wave peaks (p1) of equal amplitude (a1), wherein the wavelength (wl2) of the wave troughs (t1, t2) on each side of the at least one wa

Abstract: The present disclosure relates to a fuel cell membrane humidifier in which a gap between an inner case and a mid-case constituting a cartridge is sealed to prevent off-gas from being bypassed.

Abstract: A degasser for degassing a mobile phase includes a degasser chamber with a degasser volume for receiving a degassing membrane, a delimiting unit for delimiting a first space of the degasser volume with respect to a second space of the degasser volume while maintaining a fluid connection between the first space and the second space. The first space in an operation in an environment of the degassing membrane includes a higher partial pressure of vapor of the mobile phase than the second space with a lower partial pressure of vapor of the mobile phase. The degasser further includes a suction unit for sucking a gas that passed through the degassing membrane from the second space, and/or an associated gas supply unit for supplying an associated gas in the second space or in a fluid conduit that is connected to the second space.

Abstract: The air sterilizer comprises a housing (1), at one end of which there is an air inlet unit (5) in which a fan (3) is arranged in a fixed manner; a spiral plate heat exchanger (2) arranged in the housing (1), in the center of which an electric heating unit (7) is arranged; an air outlet unit (6) at the other end of the housing (1); wherein the spiral plate heat exchanger (2) has an air inlet duct (31) running from the air inlet unit (5) to the electric heater (7) and a counterflow air outlet duct (32) running from the electric heater (7) to the air outlet unit (6), which ducts (31, 32) run helically next to each other. At one end of the housing (1) of the air sterilizer, adjacent to the air inlet unit (5), an air outlet (18) is formed on each side of the housing (1). Each side of the spiral plate heat exchanger (2) is sealed by an end cover. An air inlet (19) is formed on the end covers, which opens into the air inlet duct (31) running to the electric heating unit (7).

Abstract: A gas processing apparatus includes a duct, a partition plate and a liquid supply. The duct has therein a flow path through which a gas passes. The partition plate is configured to divide the flow path into multiple spaces, and is formed of a porous material, through which the gas passes, configured to retain a liquid. The liquid supply is configured to supply a dissolving liquid configured to dissolve a target component contained in the gas to the partition plate. The gas passing through the flow path is brought into contact with the dissolving liquid retained in the partition plate.

Abstract: A secondary element for a filter system has first and second ends oppositely positioned to each other in longitudinal direction. The first end is closed by a closed end disk. The closed end disk has a first connection device for interacting with a complementary second connection device of a central tube of the filter system and for fixing the secondary element on the central tube. The first connection device has lock elements with radially inwardly oriented lock hooks distributed circumferentially on the closed end disk. A filter medium surrounds the lock elements. The lock elements include two directly neighboring lock elements having a distance relative to each other along the circumference of the closed end disk that is larger than a circumferential measurement of a radially outwardly oriented deflection element arranged at a collar of the central tube. A filter system with such a secondary element is provided.

Abstract: An air purifier includes a housing, a first blower, a second blower, and a filter. The housing has a cavity inside, an inlet and an outlet. The first blower has a first fan in the housing. The second blower has a second fan in the housing. The second blower faces the first blower in an opposing direction. The inlet is located between the first blower and the second blower in the opposing direction. The inlet opens in a direction intersecting the opposing direction. The first fan of the first blower and the second fan of the second blower generate airflow such that air flows into the cavity through the inlet, and flows from the cavity through the filter to the outlet.

Abstract: An outdoor air purifier includes a housing including at least one housing cover part, a mounting base, at least one flow inlet for outdoor air to be purified, at least one flow outlet for cleaned air, and an inner clean air space, a fan having a standing rotational axis and arranged within the housing, wherein the at least one flow inlet is arranged radially with regards to the standing rotational axis, and the at least one flow outlet is arranged axially with regards to the standing rotational axis, and at least one filter element at least partially surrounding the inner clean air space. The fan is displaced axially from the mounting base and is in fluid connection with the inner clean air space. The at least one filter element extends essentially parallel to the standing rotational axis.

Abstract: A filtration component with microcapsule elements for respiratory protective devices is provided. In some examples, the filtration component includes a periphery wall element and a filter media element. In some examples, the periphery wall element comprises a plurality of microcapsules. In some examples, the filter media element is secured to an inner circumference surface of the periphery wall element.

Abstract: An anti-propylene mask and method for preparation thereof is provided; the anti-propylene mask includes a fiber cloth contact layer, an antistatic non-woven fabric layer and a fullerene/nano titanium dioxide spunbond layer which are arranged in sequence; the fullerene/nano titanium dioxide spunbond layer is made by spun-bonding the modified resin material into a fiber web; the raw materials of modified resin materials include matrix resin, carboxylated fullerene derivatives, nano titanium dioxide, a lubricant, and a coupling agent; the modified resin material is prepared by following method: the carboxylated fullerene derivative is mixed and reacted with the nano titanium dioxide to prepare the carboxylated fullerene derivative-modified nano titanium dioxide, which is then blended and extruded with the remaining components in the raw material, and thus prepared. The mask can prevent propylene from entering the human body through the human respiratory organs and has a good anti-propylene effect.

Abstract: A system for filtering an airflow of exterior ambient air. The system includes a plurality of frame uprights, a plurality of crossbars pivotally connected to the frame uprights and a plurality of filters that are slidably received between the plurality of crossbars.