A handheld device for treating air to a user includes an airflow path having an illumination chamber with a reflective surface, wherein the reflective surface is sufficiently reflective and configured to impart multiple reflections of at least a portion of the light introduced into the illumination chamber. The introduced light is produced by an onboard UV light generator, wherein the UV light generator can be cycled corresponding to at least one of a pressure and an airflow in the airflow path.

An UV air and surface disinfection apparatus comprises a housing with moveable or adjustable walls, an air chamber defining a passageway operable to receive air and direct the air in a predetermined direction, a plurality of ultraviolet light sources supported by the housing and arranged in a predetermined pattern around the air chamber such that, when the plurality of ultraviolet light sources are energized, the plurality of ultraviolet light sources project ultraviolet radiation outward to facilitate sterilizing air as it moves through the air chamber and when the walls are open, the ultraviolet radiation is further projected outwardly to an environment or area outside of the housing to facilitate sterilizing surfaces.

An air flow system for reducing pathogens in a breathable airstream in an environment has a device having an airstream intake for receiving a volume of untreated air located in a first position, an airstream outlet for expelling a volume of treated air, the airstream outlet located in a second position extending above the first position, a flow path extending between the airstream intake and the airstream outlet, at least one of a UV generator and a UV-C emitter optically coupled to the flow path, a power source operably connected to the one of the at least one of the UV generator and the UV emitter, and a pressure generator fluidly connected to the airstream intake, the pressure generator configured to impart a flow from the airstream intake to the airstream outlet, wherein the pressure generator can be at least one of a force of flow from in line pressurized source or provided by a fan within the housing, and wherein a portion of the flow path includes a UV-C highly reflective surface.

Microfluidic delivery systems for dispensing a fluid composition into the air comprising microfluidic die and at least one heating element that is configured to receive an electrical signal comprising a certain on-time and wave form to deliver a fluid composition into the air.

A system, unit, device and method are shown for providing substantially simultaneous disinfection of bacteria or other pathogens in air passing through the system using C-band ultraviolet radiation from an ultraviolet light source and that is also capable of substantially simultaneous and efficient disinfecting air and surfaces outside the device using the same ultraviolet light source.

The present disclosure relates to an air modifying device for extending the shelf life of a fresh product and to methods of extending the shelf life of fresh products. Certain embodiments of the present disclosure comprise an air modifying device for extending shelf life of a fresh product. The device comprises a hollow body, one or more means for moving air or a gas through the hollow body, a surface within the hollow body, the surface comprising a metal oxide, and a source of UV light within the body to direct UV light onto the surface comprising the metal oxide, wherein irradiation of the metal oxide with the UV light modifies the air or gas moved through the device so that release of the modified air or gas from the device into the atmosphere around the fresh product extends the shelf life of the fresh product.

A space cleaning system includes: a detection unit configured to detect generation and a generation position of an infectious substance in a space; an airflow control unit configured to generate an airflow towards the generation position detected in response to detection of the generation of the infectious substance; and a cleaning control unit configured to clean the space at least after the generation of the infectious substance is detected.

An air sterilizer to effectively prevent infection of diseases is provided. The air sterilizer includes a case having a suction port and a discharge port of air, a sterilizer arranged inside the case and sterilizing or inactivating bacteria or viruses in air inside the case, and an airflow generator generating an airflow that directs air containing at least an exhalation of a person in a space outside of the case to the suction port.

A device for selectively providing an odor-rich environment includes a housing and a cover. The housing includes a central cavity and a plurality of chambers configured to store a predefined fragrance therein and having a respective outlet formed on an outer wall of the housing. The cover includes an exterior surface having at least one vent formed on the exterior surface. The exterior surface includes an interior sidewall and an exterior sidewall forming an inner chamber that slidably engages the housing such that the cover is configured to move between an open position and a closed position. Responsive to the cover being in the open position, the at least one vent is generally adjacent to the outlet of at least one of the plurality of chambers of the housing. The odor-rich environment can assist in preventing and/or treating postoperative delirium (POD) postoperative cognitive dysfunction (POCD), and/or pain in a subject.

Lighting systems combine UV-A and white light with an adjustable CCT value so that any adverse effects from the UV-A radiation are mitigated—that is, tunable adjustments to the output of the non-UV LEDs, or to all of the LEDs, result in an overall mixed output conforming to a target CCT value.