In an assembly for controlling filtering of vacuum air flow evacuated from a system storage container through an air evacuation duct in vacuum operated waste collection systems, an assembly housing is installed stationary in the air evacuation duct with an inner passage in the assembly housing communicating with the air evacuation duct, a control unit is installed in the assembly housing with a shiftable member intersecting the inner passage in the housing, whereby the shiftable member has one or more air filtering elements and the air filtering element being movable in a direction generally transversal to the inner passage in the assembly housing.

A vacuum filter apparatus is used to induce the influx of polluted air through a replaceable motor driven filter to remove airborne particulate pollutants. The apparatus comprises a frame with an inlet and outlet. The filter is covering the inlet while a vacuum generator is mounted on a hinged lid that covers the outlet. The filter is stretched over a drive roller and wrapped around a passive roller. The driver roller is connected to a motor through a gear box. The vacuum generator includes at least one blower that induces negative pressure inside the frame. A controller is used to control the normal operation of apparatus and alarms a user with the need of filter replacement. A lift assembly provides attachment of the apparatus to any extraneous carrier, thus, achieving substantial cleaning of polluted air right at fire/demolition sources when deployed in air by drones, lifts, etc.

Methods and systems are provided for regeneration of a particulate filter including a filter body having a filter paper looped along a plurality of rolling guides. At least one rolling guide may be a roller heater having a motor and a heater. Activation of the roller heater based on a pressure difference across the particulate filter regenerates the particulate filter during a regeneration phase and positions a regenerated section of the filter paper for trapping soot in a subsequent soot loading phase.

A wind scavenger including a frame, a litter collection unit, a lower gear-wheel assembly, an upper gear-wheel assembly, a net element, and a fan system is provided. The litter collection unit is attached to a base member of the frame. The litter collection unit includes a receptacle for collecting litter. The net element includes flexibly jointed plates for catching the litter blown by wind. The fan system is connected to the upper gear-wheel assembly via a power transmission system. The fan system, in communication with the wind, rotates the upper gear-wheel assembly and in turn rotates the net element around the upper gear-wheel assembly and the lower gear-wheel assembly and vice versa. The rotation of the net element from the upper gear-wheel assembly to the lower gear-wheel assembly conveys the litter caught by the flexibly jointed plates of the net element into the receptacle of the litter collection unit.

A wind scavenger including a frame, a litter collection unit, a lower gear-wheel assembly, an upper gear-wheel assembly, a net element, and a fan system is provided. The litter collection unit is attached to a base member of the frame. The litter collection unit includes a receptacle for collecting litter. The net element includes flexibly jointed plates for catching the litter blown by wind. The fan system is connected to the upper gear-wheel assembly via a power transmission system. The fan system, in communication with the wind, rotates the upper gear-wheel assembly and in turn rotates the net element around the upper gear-wheel assembly and the lower gear-wheel assembly and vice versa. The rotation of the net element from the upper gear-wheel assembly to the lower gear-wheel assembly conveys the litter caught by the flexibly jointed plates of the net element into the receptacle of the litter collection unit.

A wind scavenger including a frame, a litter collection unit, a lower gear-wheel assembly, an upper gear-wheel assembly, a net element, and a fan system is provided. The litter collection unit is attached to a base member of the frame. The litter collection unit includes a receptacle for collecting litter. The net element includes flexibly jointed plates for catching the litter blown by wind. The fan system is connected to the upper gear-wheel assembly via a power transmission system. The fan system, in communication with the wind, rotates the upper gear-wheel assembly and in turn rotates the net element around the upper gear-wheel assembly and the lower gear-wheel assembly and vice versa. The rotation of the net element from the upper gear-wheel assembly to the lower gear-wheel assembly conveys the litter caught by the flexibly jointed plates of the net element into the receptacle of the litter collection unit.

The present invention relates to an air filter housing for supplying air to a space, said air filter housing being configured to be arranged in a ceiling of said space, said housing having a mouth facing downward, said mouth comprising a sealing surface configured to receive a panel type air filter comprising a frame and a filter medium held within said frame, such that a sealing connection between said sealing surface and said frame is achieved, characterized in that said filter housing further comprises at least one resilient member arranged below the sealing surface such that when a panel type air filter is inserted into the mouth, the resilient member will be deformed by the filter frame as the filter passes the resilient member, and resume its original shape once the filter has passed, such that the filter is retained between the sealing surface and the resilient member. The present invention further relates to the use of a filter housing in a cleanroom, and to a method of mounting a panel type air filter in an air filter housing.

The present invention relates to an air filter housing for supplying air to a space, said air filter housing being configured to be arranged in a ceiling of said space, said housing having a mouth facing downward, said mouth comprising a sealing surface configured to receive a panel type air filter comprising a frame and a filter medium held within said frame, such that a sealing connection between said sealing surface and said frame is achieved, characterized in that said filter housing further comprises at least one resilient member arranged below the sealing surface such that when a panel type air filter is inserted into the mouth, the resilient member will be deformed by the filter frame as the filter passes the resilient member, and resume its original shape once the filter has passed, such that the filter is retained between the sealing surface and the resilient member. The present invention further relates to the use of a filter housing in a cleanroom, and to a method of mounting a panel type air filter in an air filter housing.

Implementations disclosed herein provide a compact downdraft table including a spark arrestor oriented below a work surface, a vertically oriented cylindrical filter cartridge located below the work surface, a fan assembly that draws air through the work surface, the spark arrestor, and the filter cartridge and exhausts filtered air out of the downdraft table, a purge assembly that discharges purged air to an interior of the filter cartridge to purge particulates collected on an exterior of the filter cartridge, wherein the spark arrestor, filter cartridge, fan assembly, and purge assembly are all contained within a main housing for the downdraft table.

Implementations disclosed herein provide a compact downdraft table system including a vertically oriented cylindrical filter cartridge located below a work surface in a main housing of the downdraft table, a purge assembly in the main housing vertically aligned with the filter cartridge that discharges purged air to an interior of the filter cartridge to purge particulates collected on an exterior of the filter cartridge, and a self-closing louvre in the main housing that permits air flow from the work surface, through the louvre, and through the filter assembly in a first direction, and prevents purged air flow from flowing through the louvre to the work surface in a second direction opposite the first direction.