A dynamic treatment system incorporates multiple pathogen reduction devices and sensors for enhanced pathogen reduction. The system can provide coordinated multi-level control to provide automated engineered control of pathogen reduction that is suitable for use in confined spaces, such as building and vehicle systems. Room level occupancy tracking provides biological load level estimates while pressure level sensing provides pathogen travel path estimation through the building. Combining this pathogen load information and airflow path information the system can drive room level and building level pathogen reduction device adjustments to enhance pathogen reduction based on expected pathogen travel. Zone level pathogen interception, height adjustable portable treatment devices, along with various application specific pathogen reduction devices can be integrated into the dynamic treatment system.

An air purification system includes a conduit extending between an inlet and an outlet, each in fluid communication with an enclosed environment. Ambient air from the enclosed environment enters the conduit via the inlet and treated air exits the conduit and enters the enclosed environment via the outlet. The system further includes a fibrous filter disposed within the conduit and configured to treat the ambient air thereby generating the treated air, and a renewal unit disposed within the conduit and configured to renew the fibrous filter.

Apparatuses, systems, and methods for combined light disinfection are disclosed. In some examples, a light fixture may comprise a first light source configured to emit a first light comprising a wavelength in a range of 380-420 nanometers (nm) and a second light source configured to emit a second light comprising a wavelength in a range of 200-230 nm, wherein the first light source and the second light source are separated to prevent degradation, by the second light, of the first light source, and wherein the first light and the second light combine to form a disinfecting light configured to initiate inactivation of microorganisms.

An air sterilizing device has a casing, a wheel disc covered with microporous structures, a blower, and a sterilizing module. The casing has an air inlet and an air outlet. The blower located in the casing introduces the external air from the air inlet, and the external air is filtered and sterilized by the wheel disc and the sterilizing module. The filtered and sterilized air is discharged from the air outlet. The sterilizing module locates next to the wheel disc for sterilizing the air flowing through the sterilizing module and also for sterilizing the wheel disc by the relative rotation between the wheel disc and the sterilizing module. Bacteria and viruses attached to the wheel disc are eliminated, and the filtration and sterilization functions of the wheel disc are maintained. The efficacy and the efficiency of the air sterilizing device are therefore improved.

An air sterilizing device has a casing, a wheel disc covered with microporous structures, a blower, and a sterilizing module. The casing has an air inlet and an air outlet. The blower located in the casing introduces the external air from the air inlet, and the external air is filtered and sterilized by the wheel disc and the sterilizing module. The filtered and sterilized air is discharged from the air outlet. The sterilizing module locates next to the wheel disc for sterilizing the air flowing through the sterilizing module and also for sterilizing the wheel disc by the relative rotation between the wheel disc and the sterilizing module. Bacteria and viruses attached to the wheel disc are eliminated, and the filtration and sterilization functions of the wheel disc are maintained. The efficacy and the efficiency of the air sterilizing device are therefore improved.

A fluid treatment apparatus including a photocatalyst filter having a first surface and a second surface, a light source unit spaced apart from the photocatalyst filter to provide light to the first surface, a housing including an inlet, an outlet, and a flow path formed between the photocatalyst filter and the light source, and a guide member disposed at one side of the housing and including at least one slat to guide a movement direction of a fluid, in which the slat is inclined at least in a direction closer to the first surface of the photocatalyst filter along an advancing direction of the flow path when an air flow rate of the fluid has a first value, and in a direction away from the first surface of the photocatalyst filter along the advancing direction when the air flow rate of the fluid is greater than the first value.

A sterilizing device includes a pipe having an inlet and an outlet and allowing fluid to move therethrough and a light source provided on one side of the pipe and providing light to the fluid. At least a portion of the pipe is provided in a spiral shape and the inlet and/or the outlet are arranged in a light emitting region.

A compact diffuser integrates an atomizer and droplet separator into a surrounding sleeve, threadable to a bottle neck as an assembly. The assembly fits into a base, housing a motor and air pump, sealing the sleeve to a silo in the housing. Controls set time span of intermittent operation, intervening delay, and volumetric flow rate. The assembly pops into (and out of) the top end of a silo in the base, registering (aligning) circumferentially and axially to seal an air path from the pump to the atomizer. Access for applying force to the bottom of the assembly facilitates popping out the assembly when empty, or to simply change scent by changing out the assembly. Entire assemblies may be stored to simplify exchange and reduce chances for spills from reservoirs.

An extraction hood includes a casing having one or more suction openings or mouths and a connection system to an outlet duct for the removal of the drawn air filter. Inside the casing there are one or more filters and one or more UV lamps designed to be used for disinfection, for the abatement of smells and greases, and for self-cleaning purposes.

An extraction hood includes a casing having one or more suction openings or mouths and a connection system to an outlet duct for the removal of the drawn air filter. Inside the casing there are one or more filters and one or more UV lamps designed to be used for disinfection, for the abatement of smells and greases, and for self-cleaning purposes.