Abstract: A device for disinfecting an air flow, comprising a hollow body having an axis A, a side wall and two base walls provided with internal reflective surfaces, an inlet opening and an outlet opening formed in the respective base walls and at least one source of UV-C radiation disposed within the hollow body, and a helical-shaped deflector axially housed in the hollow body; wherein the hollow body is cylindrical and an outer edge of the deflector cooperates substantially sealingly with the inner surface of the side wall of the hollow body so as to define with said side wall a helical conduit traversed by the entire flow. The device may be used in assisted ventilation systems to disinfect the air exhaled by a patient.

Abstract: Device for disinfecting at least one working volume in an artificial space environment, comprising a concentrator of solar radiation associated with the at least one working volume, and filtering means for selecting at least one spectral band of the solar radiation comprising UVC radiation coupled to the concentrator.

Abstract: Device for disinfecting a fluid in a conduit comprising an outer casing adapted to be connected to at least a portion of said conduit and having a longitudinal axis and a source of UV-C radiation housed in the casing, wherein the casing includes at least one side wall having a longitudinal section with a curved profile with the concavity facing the interior of the casing.