A filter system (1), in particular as part of a fuel vapor buffering apparatus to reduce hydrocarbon emissions, wherein the filter system (1) includes at least: a primary filter apparatus (2) including a primary filter housing (4) and adsorption, or respectively absorption material; and a secondary filter apparatus (3) including adsorption, or respectively absorption material; wherein the secondary filter apparatus (3) is provided on the atmosphere side to the primary filter apparatus (2); and wherein the primary filter apparatus (2) and the secondary filter apparatus (3) are arranged in the filter system (1) such that a gas conducted into the filter system (1) flows through the primary filter apparatus (2) and the secondary filter apparatus (3).

The invention relates to a medical ventilator comprising a motorized micro-blower and electronic components; a patient air circuit with a patient air inlet to a suction inlet of the micro-blower in order to supply the micro-blower with air; and a cooling air circuit comprising a cooling air inlet in order to convey cooling air which, by thermal exchange, is intended to cool at least some of the electronic components. The patient air inlet is equipped with a first filter, and the cooling air inlet is equipped with a second filter. The filters are arranged in a common filtration cartridge, which is fastened detachably to the ventilator at the region of the air inlets.

An air filtration device (1) of an air suction system of a vehicle engine includes a suction manifold (2) extending in length along a main axis (X-X). The air filtration device (1) further includes at least two tubular filters (3), a first tubular filter (31) and a second tubular filter (32) arranged in series along said main axis (X-X) inside the suction manifold (2). The air filtration device (1) further includes a support (4) supporting the tubular filters (3) in the suction manifold (2). The support (4) includes at least one connection element (45) which mechanically supports two consecutive tubular filters, connecting the filters fluidically. Furthermore, the support (4) includes a partialization device (41) to create an obstruction to the flow of clean air flowing inside the first inner cavity (31) to favor flow of air through the second tubular filter (32).

A dry filter 1 to be used in particular in underground mining and tunnel construction having a frame construction 17 into which the required part housings 25-28 can be inserted from the side. The required partition wall 8 is arranged so that an optimal large filtering surface is available both for the incoming raw gas and for the outflowing clean gas. Raw gas duct 5 and clean gas duct 6 run horizontally one above the other and are separated from each other by the sloping 8. This means that a very large filtering surface is available.

The present disclosure generally relates to an air filtration system, an air filtration device, and an air filtration module for removing ultra-fine particles (UFPs), pathogens (e.g., viruses, bacteria, etc.), volatile organic compounds (VOCs), oxides or odors. The systems, devices, and filter modules of the disclosure perform at enhanced filter and power efficiencies. An air filtration system is provides that includes a docking base for receiving a removable, portable air filtration device in fluid communication with the docking base. In certain embodiments, the air filtration system further includes the removable, portable air filtration device. The portable air filtration device may optionally include an air filtration module.

The present disclosure relates to a gas filtering device that allows to cover and filter gases emanating from liquid and/or solid substances without the use of auxiliary technologies. The gas filtering device comprises an air tight geomembrane that is adapted to cover and seal the surface from which the gas emanations come from, one or more air permeable filtering cartridge pocket(s) embedded within the air tight geomembrane that are adapted to adopt an opened configuration and a closed configuration, and one or more corresponding filtering cartridge(s) that are releasably secured within the air permeable filtering cartridge pocket.

A gas conditioning unit for a surgical gas delivery device is disclosed, which includes a filter housing having an insufflation gas flow path for delivering insufflation gas to a body cavity and for facilitating pressure measurements from the body cavity, a pressurized gas flow path for delivering pressurized gas from a pump in the surgical gas delivery device to an internal nozzle in the filter housing that accelerates the pressurized gas and thereby generates a continuous pressure barrier that inhibits egress of insufflation gas from the body cavity, a vacuum return flow path for returning depressurized gas spent by the internal nozzle back to the pump under vacuum, an air entrainment flow path for drawing air into the body cavity to maintain a given pressure therein, and a smoke evacuation flow path for conveying smoke from the body cavity.

This present description discloses a combined air filter element filtering device, where the first filter element and second filter elements have a cube or cuboid shape. The second filter element and the first filter element are oriented in sagittal symmetry. The third filter element and the fourth filter element are oriented in symmetric distribution at the two sides of the first filter and second filter elements. The third filter element and the fourth filter element are in a semicircular or semi-arc ring structure. The first filter element, second filter element, third filter element and fourth filter element, when assembled into the combined air filter element device form a kidney-shaped or an oval three-dimensional ring-shaped combined air filter element filtering device. First, second, third and fourth filter elements are arranged to allow axial passage of air through the filter elements with decreased resistance and improved volume in order to reduce the air intake resistance in the filter element and increase the filter area so as to provide a combined air filter element filtering device of the same dimensions as conventional filters yet having a higher air inlet volume and improved clogging capacity, higher filtering efficiency and service life.

The present disclosure generally relates to an air filtration system, an air filtration device, and an air filtration module for removing ultra-fine particles (UFPs), pathogens (e.g., viruses, bacteria, etc.), volatile organic compounds (VOCs), oxides or odors. The systems, devices, and filter modules of the disclosure perform at enhanced filter and power efficiencies. An air filtration system is provides that includes a docking base for receiving a removable, portable air filtration device in fluid communication with the docking base. In certain embodiments, the air filtration system further includes the removable, portable air filtration device. The portable air filtration device may optionally include an air filtration module.

A filter unit for use with a filtrating fluid flow system is configured to receive a flow of a fluid containing particulate matter. The filter unit comprises a filter structure formed of a filter material configured to at least partially filter the particulate matter from the flow of fluid. The filter unit further comprises an entry plate located proximate the filter structure entrance. The filter structure and the entry plate together define a fluid cavity within the filter unit, the entry plate having at least one orifice defined therein through which the flow of fluid can pass into the fluid cavity. The orifice is configured to form a choke, creating a Venturi effect for temporarily increasing the velocity of the flow of fluid through the entry plate and within the fluid cavity, and onto the filter material.