Systems, methods, apparatuses, and devices for removal of undesired materials are disclosed. Production of desired materials may result in the production of undesired materials. The systems, methods, apparatuses, and devices, may provide for removal of the undesired materials from various environments (e.g., industrial, commercial, residential, natural, etc.). The undesired materials may be removed in a substantially continuous manner and may limit or prevent contamination of an ambient environment with the undesired materials. The undesired materials may be removed with high-pressure vacuum through a fluid flow path that keeps the undesired materials from the ambient environment.

Assemblies and methods to extract materials from a retention collection may include a vacuum source including a series of vacuum generators configured to generate a vacuum flow to create a suction between the retention collection and a material collector for extraction of the material from the retention collection and transfer to the material collector. The suction generated by the vacuum flow will be sufficient to draw-in and convey the material in liquid, semi-solid and substantially solid states from the retention collection along a collection conduit and into the material collector for disposal. The vacuum generation assembly may include a filter and sound attenuation chamber connected to the vacuum source configured to receive and filter a vacuum exhaust fluid/air flow portion of the vacuum flow and to attenuate sound generated by the vacuum source.

A filter system has a filter housing with a fluid inlet for inflow of a fluid into the filter housing. A filter element is removably received in the filter housing. The filter element has a folded filter medium and a stabilization ring attached to the filter medium and stabilizing the filter medium. The stabilization ring is arranged on the filter medium such that the stabilization ring, at least in sections, is arranged within an inflow cross section of the fluid inlet. The fluid directly flows against the filter medium in operation of the filter system.

An air cleaner assembly comprises a filter element and a housing assembly. The filter element comprises a filter media for filtering a fluid and a first endcap positioned along a first end of the filter media and through which a first filtered air flow portion flows. The housing assembly at least partially contains the filter element and comprises a cover that defines a first outlet through which the first filtered air flow portion flows to a downstream device. The cover comprises a noise reduction device that receives the first filtered air flow portion and dissipates sound waves traveling upstream from the downstream device.

A backpack dust collector includes a housing, a slit portion, and a noise-absorbing member. The housing includes a suction port, a dust collecting chamber, a motor chamber, and an exhaust port. The dust collecting chamber is connected to the suction port and configured to accommodate a dust collecting bag. The motor chamber is connected to the dust collecting chamber and accommodates a fan and a motor. Through the exhaust port, air from the motor chamber is discharged. The slit portion is disposed in a flow path between the motor chamber and the exhaust port and includes at least one slit-shaped vent through which air from the motor chamber passes. The noise-absorbing member is disposed in at least part of a flow path between the vent and the exhaust port.

An air filter housing has an inner housing space adapted to receive an air filter element. The air filter housing includes a first housing end and a second housing end located axially opposite the first housing end in relation to the inner housing space, and an outlet pipe extending from the second housing end axially into the inner housing space. The outlet pipe has a center axis and an opening configured to receive clean air from the inner housing space, wherein at least an axial portion of the outlet pipe has a cross-sectional area along a geometrical plane perpendicular to the centre axis which is tapering.

A silencer element is disposed in the throat void space of a filter element. A carrier includes a first seat upon which the filter element sits and a sealing surface which forms an airtight seal with the silencer element. The silencer element includes sound absorbing media. The sound absorbing media inward surface delimits a throat void space. Inward of the sound absorbing media inward surface, is an, air permeable, porous, sound permeable inner sidewall which delimits void spaces which comprise through openings to the sound absorbing media inward surface. Outward of the sound absorbing media outward surface is a cylindrical, air permeable, porous, sound permeable outer sidewall which delimits void spaces which comprise through openings to the sound absorbing media outward surface.

Proposed is a vehicle air conditioner, which performs cooling and heating by supplying cold air and hot air in an interior of the vehicle. The vehicle air conditioner includes an intake unit installed at an engine room and configured to suction and blows internal and external air to the interior, a heat exchanger unit configured to cool or heat and supply air blown from the intake unit, a case cover installed on an outer surface of the intake unit to cover the intake unit, and a case soundproofing member installed between an intake case of the intake unit and the case cover and configured to block noise that is transmitted to the intake case from the outside of the case cover.

A sound dampening apparatus and associated methods of use are disclosed for dampening or otherwise preventing impact noises between an HVAC air filter and a cavity of an air duct in which the air filter is positioned. In at least one embodiment, the apparatus provides a base portion engagable with a lower end of the cavity. An opposing support portion of the apparatus is configured for selectively contacting a lower face of the air filter and supporting the air filter thereon. An at least one selectively compressible spring member extends between and interconnects the base portion and the support portion. Thus, with the air filter positioned between the support portion and an upper end of the cavity, and air flowing through the cavity in a substantially upward direction, the support portion prevents the air filter from impacting the lower end of the cavity upon cessation of said air flow.

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.