The invention relates to a sound-absorbent element for an air outlet, said air outlet comprising a housing with an air outlet opening and a connection to an air supply shaft, at least one sound-absorbent element being mounted in said housing and/or a housing of the air supply shaft, and said sound-absorbent element comprising a carrier that is connected to at least one layer of sound-absorbent material. Said at least one layer of sound-absorbent material comprises activated carbon, or at least one additional layer of activated carbon is applied to this layer of sound-absorbent material.

A vehicle air purification system includes a first heating device (130-1), a first adsorption block (140-1), and a first flow path switching mechanism (150-1). The vehicle air purification system includes a first flow path configured to communicate with a vehicle cabin, a second heating device (130-2), a second adsorption block (140-2), and a second flow path switching mechanism (150-2). The vehicle air purification system includes a second flow path configured to communicate with the vehicle cabin, a blower (110) configured to circulate air from the vehicle cabin, an air distribution mechanism (120) configured to distribute air flowing from the vehicle cabin to the first flow path and the second flow path, and a control device (20). The control device (20) controls components at a timing when the flow of the air from a flow path of a side on which purification target substances are being desorbed to the vehicle cabin is able to be limited when the flow path is switched between a flow path along which the air that has passed through a first adsorption block flows and a flow path along which the air that has passed through a second adsorption block flows.

An apparatus for irradiating air flow in a vehicle includes a filter unit configured to couple to a recirculating-air conduit connected to a manifold of an air circulation system, the filter unit having an inlet end, and a filter disposed in the inlet end of the filter unit, including an outer High Efficiency Particulate Air (HEPA) media. The apparatus further includes a plurality of ultraviolet light transmissive strands that each have distal ends disposed in a spaced apart manner in an interface region between the outer HEPA media filter and an inner activated carbon filter or HEPA filter, and proximal ends connectable to an ultraviolet light emitting source such that ultraviolet light is transmitted by the transmissive strands into the interface region. The transmissive strands are configured to receive emitted ultraviolet light that is substantially between 222 nm and 265 nm for irradiating air passing through the filter.

Systems and methods for integrating a building management system communicatively coupled to a security subsystem via a communication network, in which the building management system determines occupancy data, with a heating, ventilation, and air conditioning subsystem that includes a scrubber unit communicatively coupled to the building management system via the communication network. The scrubber unit includes a contaminant filter that sorbs air contaminants from a surrounding environment when an elevated pressure differential is introduced across the contaminant filter; an inlet sensor that determines sensor data indicative of contaminant level present in return air received by the scrubber unit from an internal portion of the building; and scrubber control circuitry that selectively instructs the scrubber unit to operate in one of multiple regeneration modes based at least in part on the occupancy data and the sensor data to facilitate improving filtering efficiency provided by the contaminant filter during subsequent operation.

A photocatalyst filtration system for a vehicle includes a housing having an airflow path, and a filter configured to filter air flowing in the airflow path, the filter having a first photocatalyst and a second photocatalyst. The system further includes a first ultraviolet (UV) light source disposed proximate the filter and configured to energize the first photocatalyst, and a second UV light source disposed proximate the filter and configured to produce light having a shorter wavelength than light produced by the first UV light source, and configured to energize the second photocatalyst. One of the first photocatalyst or the second photocatalyst is configured to remove odor from the air. The other of the first photocatalyst or the second photocatalyst is configured to remove bacteria from the air.

An apparatus and process for separating and removing CO.sub.2 generated by one or more passengers in the air in the interior of a cabin of a vehicle. Provided are: —a first stream of the air from the interior of the cabin to an interior of a container holding a loose particulate sorbent for CO.sub.2; —a second stream of air depleted in CO.sub.2 from the interior of the container holding the sorbent to an interior of the cabin; —a third stream of the air from exterior of the cabin to the inferior of the container holding the sorbent; and —a fourth stream of air enriched in CO.sub.2 from the interior of the container holding the sorbent to an exterior of the cabin.

An air purification device includes an adsorption block, a housing, an introduction port for indoor air, an introduction port for heated air, a return port for indoor air, and a discharge port for used regeneration air. The adsorption block adsorbs purification target substances in indoor air, and is regenerated by dispersing the adsorbed purification target substances by circulating heated air. The housing accommodates the adsorption block therein. The introduction port for indoor air and the introduction port for heated air are provided on one end side of the housing. The return port for indoor air and the discharge port for used regeneration air are provided on the other end side of the housing. An insulating layer is provided between the housing and an outer surface of the adsorption block.

An apparatus and method are provided for purifying air for breathing. The apparatus includes an armrest having a receiver and an air purification module releasably received in the receiver. The air purification module is portable and displaceable between a first operating position held in the receiver and a second operating position remote from the armrest and the vehicle.

A compressor replacement kit for a vehicle air conditioning system includes a package, a compressor disposed and engaged in the package, a drier filter disposed and engaged in the package, an expansion device disposed and engaged in the package, and a seal kit disposed and engaged in the package for allowing the user to find and purchase all the parts and elements and components needed or required for the vehicle air conditioning systems of the particular or selected vehicles easily and quickly.

A device for reducing a carbon dioxide and water content in an enclosed air volume has first and second sorption units for sorbing carbon dioxide and water. The first and second sorption units can be transferred from a sorption mode into a desorption mode and vice versa. In the sorption mode, the first and second sorption units sorb carbon dioxide and water from raw air of the enclosed air volume. In the desorption mode, the first and second desorption units desorb carbon dioxide and water to supplied regeneration air. An air distribution device can switch the first and second sorption units, based on the carbon dioxide and water content, alternately from sorption mode into desorption mode such that, in at least one operating state of the device, one of the first and second sorption units is in sorption mode while the other is in desorption mode.