A dehumidifying element includes a plurality of sheets that have moisture adsorption and desorption properties and that are stacked on top of each another. At least some of the sheets each have an irregular shape. The sheets each contain a hygroscopic agent having properties of a re-moistening-type glue that exhibits adherence when adsorbing moisture and that solidifies when being dried. The sheets are bonded to each other by the hygroscopic agent.

A CO2 capture system for efficiently capturing CO2 from emissions emitted from buildings. The CO2 capture system comprises: a CO2 capture device that captures CO2; a flow path that delivers an exhaust gas emitted from a building to the CO2 capture device; a flow rate regulator that regulates a flow rate of the exhaust gas; and a control unit that controls the flow rate regulator to regulate the flow rate of the exhaust gas.

An air purification device includes a driving part for changing a location thereof, a fan, a carbon dioxide absorption filter for absorbing carbon dioxide in the air, a filter reproduction part for removing carbon dioxide absorbed into the carbon dioxide absorption filter, and a processor configured to control the driving part such that the air conditioning device moves to an area that can support ventilation, and drive the filter reproduction part for removing carbon dioxide absorbed into the carbon dioxide absorption filter in the area that can support ventilation.

A cylindrical filter device of the present invention includes a wavy filter screen, a sealing device, and a connecting device. The wavy filter screen includes a first flexible side strip, a second flexible side strip opposite to the first flexible side strip, and a plurality of wavy structures disposed between the first flexible side strip and the second flexible side strip. The wavy filter screen wraps to form a cylindrical structure with respect to an axis. The opposite ends of the cylindrical structure are respectively wrapped to form a first opening and a second opening by the first flexible side strip and the second flexible side strip. The sealing device is disposed at the first opening and has a first groove. The first flexible side strip is able to engage with the first groove with its elasticity and makes the first opening be sealed by the sealing device. The connecting device is disposed at the second opening. The connecting device has a second groove and a port. The second flexible side strip is able to engage with the second groove with its elasticity and makes the second opening communicate with the port.

A dehumidifying element includes: a layered body in which a plurality of sheets supporting an adsorbent that dehumidifies air are stacked on one another, with gaps provided between adjacent ones of the plurality of sheets, the gaps allowing air to pass therethrough; a casing that holds the layered body; and a cushioning member provided between the casing and the layered body in a stacking direction in which the plurality of sheets are stacked on one another, the cushioning member being configured to expand and contract.

An electrostatic precipitating apparatus for an air conditioning system is disclosed. The precipitating apparatus includes an electrostatic precipitator including a plurality of discharge electrodes to which a voltage is applied and a plurality of electrostatic precipitating electrodes each disposed between the discharge electrodes and grounded, a washing water supply spraying the washing water to the electrostatic precipitator, and a frame assembly fixed to the duct to support the electrostatic precipitator. The frame assembly is fixed to the duct to support the electrostatic precipitator, and includes a prestressing locking member fixed to inside of the duct in a state in which a pressing force is applied to the electrostatic precipitator.

A high-adsorption-performance nanofiber filter medium includes a support material and a composite nanofiber filtration layer that includes multiple nanometer composite nanofiber layers deposited and stacked on the support material. The nanometer composite nanofiber layer includes first, second, and third nano-powder composite nanofibers, which are uniformly mixed by means of an airflow or are sequentially laminated to form the nanometer composite nanofiber layer. The nanometer composite nanofiber layer formed through sequential lamination includes first, second, and third nanofiber layers. The first nanofiber layer includes multiple first nano-powder composite nanofibers. The second nanofiber layer is stacked on the first nanofiber layer and includes multiple second nano-powder composite nanofibers. The third nanofiber layer is stacked on the second nanofiber layer and includes multiple third nano-powder composite nanofibers. The composite nanofiber filtration layer is formed of multiple nanometer composite nanofiber layers, so that the high-adsorption-performance nanofiber air filter medium shows improved performance.

A dehumidifier apparatus is provided. The apparatus includes a housing having an interior space and a vent for permitting airflow into the interior space. The apparatus also includes a cartridge sized for removable insertion into the interior space of the housing. The cartridge includes a tray defining a first pocket, a second pocket, and a channel extending from the first pocket to the second pocket. The cartridge also includes a cover coupled to the tray over the first pocket such that the first pocket is in fluid communication with the second pocket via the channel. The cover has a first layer and a second layer detachable from the first layer. The first layer is gas permeable and liquid impermeable. The second layer is gas impermeable and liquid impermeable. The cartridge further includes a desiccant material contained in the first pocket by the cover.

Described is a device (1) for reducing pollutants in a gaseous mixture comprising: •a containment body (2) having an inlet portion (3) for the gaseous mixture and an outlet portion (4) for the gaseous mixture, the containment body (2) imposing on the gaseous mixture a fixed direction of flow (D), •at least one filtering unit (10) comprising a photocatalytic filter (7) interposed, along the fixed direction of flow (D), between a first light source (6a) and a second light source (6b), both having a wavelength in the visible spectrum (400-700 nm), the photocatalytic filter (7) comprising a photocatalytic nanoparticle coating and the nanoparticle coating comprising titanium dioxide doped with a nitrogen doping agent. •a unit (5) for straightening the flow before the filtering unit (10).

Provided is a method for decomposing nicotine in a simple way. A method for decomposing nicotine, according to the present invention, includes a step(a) of irradiating ultraviolet light with a main peak wavelength of 200 nm to 230 nm in a target room allowing smoking to decompose the nicotine.