An air filter and a method of air filtration using the said air filter are described. The air filter may comprise a filter media layer adapted to capture and filter one or more impurities from air. The air filter may further comprise one or more acoustic wave generating means attached at one or more sides of the filter media layer. The one or more acoustic wave generating means may generate acoustic waves to be propagated into the filter media layer. The propagation of the acoustic waves into the filter media layer may facilitate the filter media layer to enhance the filtration efficiency of the air filter. The air filter may further comprise a pre-programmed chip to control the frequency of the acoustic waves generated. Further, air filter may comprise a battery adapted to supply power to the one or more acoustic wave generating means and the pre-programmed chip.

The present disclosure relates to a dust container arrangement (15, 120, 210) adapted to be fluidly coupled to a fan arrangement (13) comprised in a power tool (1) via an at least partly flexible dust conduit (14). The dust container arrangement (15, 120, 210) comprises a frame (100, 126) which in turn comprises a holder part (102, 123) with a container inlet (101, 125). The dust container arrangement (15, 120, 210) further comprises a first container (107, 121) and a second container (108), which containers (107, 108; 121) are releasably attached to the holder part (102, 123) in a sealed manner. The first container (107, 121) is air-permeable such that air (A1) that is blown into the container inlet (101, 125) is permitted to escape through a wall (115 132) of the first container (107, 121), while the second container (108) is air-tight during operation and adapted to receive dust (113A, 113B, 113C) that is brought into the container inlet (101, 125).

An air purifier according to the present disclosure includes a first blower having a first fan configured to generate an air flow from a first suction part toward a first discharge part, a second blower having a second fan configured to generate an air flow from a second suction part toward a second discharge part, an installation space part configured to be formed between the first blower and the second blower, a power transmitter configured to be positioned inside the installation space part, to be fixed to any one of the first blower and the second blower, and to transmit wireless power, and a power receiver configured to be positioned inside the installation space part, to be fixed to the other one of the first blower and the second blower, and to receive wireless power transmitted from the power transmitter.

An air purifier may include a main body and a floating body configured to levitate above the main body via magnetic force. The main body may include a fan to suction air, a filter to filter suctioned air, and a discharge port provided on an upper surface through which air is discharged. The floating body may be provided above the discharge port and further disperse discharged air. The main body may have a magnetic force generator to provide a magnetic force that levitates the floating body, and may also have a magnetic force adjustor configured to maintain a stable position of the floating body.

An air filtration system includes a main body having a flow path; a first filter portion provided on the flow path and having a first body portion; a plurality of protrusions distributed and disposed on the first body portion; and a plurality of first through holes passing through the first body portion and interposed between the adjacent protrusions; wherein when an external fluid flows in the flow path, the external fluid passes through the protrusions first and then passes through each of the first through holes, so that the flowing external fluid is hindered by the protrusions, and thus a flow velocity at a position adjacent to the protrusions is lower than a flow velocity flowing through the first through holes, thereby vortices are respectively generated between orifices of the first through holes and the adjacent protrusions. The present invention discloses an air filtration system including: a main body having a flow path; a first filter portion provided on the flow path and having a first body portion; a plurality of protrusions distributed and disposed on the first body portion; and a plurality of first through holes passing through the first body portion and interposed between the adjacent protrusions; wherein when an external fluid flows in the flow path, the external fluid passes through the protrusions first and then passes through each of the first through holes, so that the flowing external fluid is hindered by the protrusions, and thus a flow velocity at a position adjacent to the protrusions is lower than a flow velocity flowing through the first through holes, thereby vortices are respectively generated between orifices of the first through holes and the adjacent protrusions, so that particulates contained in the external fluid stay in static areas outside the vortices.

A stepless speed regulatable handy dust cleaner is disclosed, which includes: a housing, a battery, a blower mechanism, a control module, an air filter mechanism, and a blow pipe. A side of the housing is provided with an air outlet opening, and another side of the housing is provided with an air filter opening. The housing includes a first mounting shell and a second mounting shell, each of which includes a handgrip part and an air outlet part. The first mounting shell is provided with a knob slot, where a knob is provided. The blower mechanism includes a motor, a motor board, a blower casing and a fan blade. The motor is drivingly connected to the fan blade. The battery, the control module and the motor are electrically connected to each other. When the knob is rotated clockwise, the air volume and flow pressure gradually increase. When the knob is rotated counterclockwise, and the air volume and flow pressure gradually decrease.

The present invention is disinfecting air filtration apparatus that allows multiple disinfecting air filtration modules to function in parallel. The apparatus may provide energy to respective parts of a filtration apparatus, such as a V-Bank filter apparatus. The apparatus may also include a front-mounted pre-filter frame that can be secured to other parts of the apparatus without tools. The securing of the pre-filter frame grounds the air filtration module and creates an airtight interface between the air filtration module and the array. Methods consistent with the present disclosure allow for filter apparatus to be connected to or coupled to virtually any size air ducts of an air distribution or a high voltage alternating current air conditioning (HVAC) system.

A mask structure with an externally connected filtering device includes a mask body, a unidirectional air seat valve, at least one connecting tube and a filtering device. The mask body is made of an air-impermeable material, can be provided with the unidirectional air seal valve thereon and connected with the filtering device through the connecting tube, so that the mask structure can filter and purify ambient air by the filtering device, and deliver the filtered air to the inner side of the mask body through the connecting tube for a user to inhale. The exhaled air by the user can be expelled through the unidirectional air seal valve to the outer side of the mask body.

A backpack dust collector includes a housing. The housing includes: a suction port; a dust collecting chamber connected to the suction port and configured to accommodate a dust collecting bag; a motor chamber connected to the dust collecting chamber and accommodating a fan and a motor; an exhaust port through which air from the motor chamber is discharged; first and second battery openings; and first and second battery receiving portions respectively corresponding to the first and second battery openings. At least part of the first battery opening is formed on a left side surface of the housing, and at least part of the second battery opening is formed on a right side surface of the housing.

The present invention relates generally to a passenger compartment air vent filtering device. More specifically, the invention includes a cover that can be placed over top of an existing air vent in a passenger seating compartment to filter the air flowing therefrom, and comprises both a HEPA filter and a UV light disinfection filter. In a preferred embodiment, the novel air vent filtering device further comprises a moveable element, a plurality of LED lights and a scent diffuser.