A multi-functional storage system, provided with both an air cleaning function and a clothing management function, includes a storage room, a machine room positioned on and in fluid communication with one side of the storage room, and a recirculation module positioned on and in fluid communication with a recirculation module mounting part, which is an opening positioned on the other side of the storage room. The recirculation module, to improve circulation performance, includes a recirculation module frame covering the recirculation module mounting part, an air shot hanger mounted on the recirculation module frame, a plurality of recirculation intake ports positioned on the recirculation module frame, a plurality of recirculation discharge ports positioned on the recirculation module frame, and an air shot discharge port positioned on a bottom surface of the air shot hanger.

A combination air filter and goggles includes a pair of goggles; an air filter; a tube having a first end attached to the goggles and a second end attached to the air filter; a first strap having two ends attached to the air filter; and a check valve disposed on the goggles. The air filter includes a centrifugal fan, a circuit board, a UV lamp, a filter element, a power supply, a housing, and a cover. Clean air produced by the air filter may flow to inside of the goggles.

A vertical humidifier with a stepped evaporator includes a housing. An evaporative water trough is provided inside the housing, and the stepped evaporator is provided in the evaporative water trough. A fan is mounted under the stepped evaporator, and an air inlet end of the fan is communicated with an air inlet of the housing. A water tank is further mounted at the upper portion of the evaporative water trough, the stepped evaporator is mounted around the lower portion of the water tank, and the water tank is further communicated with the evaporative water trough through a water inlet. An air outlet is provided at the upper portion of the housing, and the air outlet is communicated with an air outlet end of the fan. The stepped evaporator is arranged in an airflow channel between the air outlet and the air outlet end of the fan.

An air filter includes: a pleated filter material folded into a zig-zag form at folding lines along a first direction to have peak parts and valley parts arising alternately in a second direction perpendicular to the first direction, trapping fine particles in a gaseous matter flowing in a gas flow direction perpendicular to the first direction and the second direction; a filter frame being a rectangular filter frame including one pair of first frame materials facing each other in the second direction having end parts in the first direction, and one pair of second frame materials facing each other in the first direction having end parts in the second direction, opening in the gas flow direction and housing the pleated filter material, each of the first frame materials and each of the second frame materials being combined to provide an overlap part.

An energy-transmissible air filtration system having at least one mechanical filter and at least one electromagnetic energy source. The electromagnetic energy source generates an electromagnetic energy wave or force that traverses the at least one mechanical filter. This results in substantially simultaneous mechanical filtration and energy-based decontamination of an airstream. Other features of the embodiments are also shown.

A method for notifying a service life of a filter includes steps of providing a filter for filtering an air pollution source; providing a gas detection device for detecting the air pollution source and outputting the detection data of the air pollution source; providing a connection device for receiving, computing and comparing the detection data of the air pollution source detected by the gas detection device, so as to display a reducing rate of filtering efficiency for the filter; and when the reducing rate of filtering efficiency for the filter reaches a preset alert value, the connection device sends out a notification alert of replacing the filter.

An air cleaner is provided that may include a case including a first suction inlet, the case having a cylindrical or cone shape; a fan housing provided inside of the case, the fan housing accommodating a fan therein; a filter provided at a suction side of the fan, the filter filtering foreign materials in air which is suctioned through the first suction inlet; and a housing suction flow path formed between an outer surface of the fan housing and an inner surface of the case, the housing suction flow path allowing air which is suctioned through the first suction inlet to flow toward and through the filter. The housing suction flow path may include a first flow path inlet having a predetermined first width, and a second flow path inlet through which air having passed through the first flow path inlet flows, the second flow path inlet having a second width greater than the first width.

An air filter subassembly includes a filter element with a pre-cleaner tube member that is snapped onto the filter element.

A vacuum unit includes a debris tank receiving wet or dry waste. A multi-cyclone separator is coupled to an outlet of the debris tank. The multi-cyclone separator receives the wet or dry waste from the debris tank and the multi-cyclone separator includes a plurality of cyclones. A filter is coupled to the outlet of the multi-cyclone separator and receives exhaust airflow from the multi-cyclone which then flows onto the blower or fan and is vented external to the vacuum unit.

An air duct opening cover assembly mountable on an air duct opening includes a cover body and a retainer system for securing the cover body across an air duct opening, such as to position an air filter element across the air duct opening. The retainer system may include a releasable clip for attachment to an edge of an air duct opening or ceiling structure. The cover body may include a retention grid for supporting the air filter element. The retainer system may include one or more fasteners, which may be elongated and elastically stretchable and/or adjustable to tension the fastener against the cover body and air filter element.