A system including a tube for transferring fluid, a fiber optic cable that extends through an interior of the tube, and a light source configured to project high intensity narrow spectrum light into the fiber optic cable.

Provided is an ultraviolet (UV) light source. The UV light source includes: a substrate coupled to an upper housing; a light-emitting diode (LED) package on the substrate; and a waterproof coating layer on at least a portion of the substrate, wherein the LED package includes: an LED chip configured to generate UV light; and a transparent layer including a lower surface facing the LED chip, an upper surface opposite to the lower surface, and a lateral surface connecting the upper surface to the lower surface, wherein at least a portion of the upper surface of the transparent layer is exposed from the waterproof coating layer, and the transparent layer is configured to directly contact a sterilization-target fluid.

The invention provides a photoreactor assembly (1) comprising a reactor (30), wherein the reactor (30) is configured for hosting a fluid (100) to be treated with light source radiation (11) selected from one or more of UV radiation, visible radiation, and IR radiation, wherein the reactor (30) comprises a reactor wall (35) which is transmissive for the light source radiation (11), wherein the photoreactor assembly (1) further comprises: a light source arrangement (1010) comprising a plurality of light sources (10) configured to generate the light source radiation (11), wherein the reactor wall (35) is configured in a radiation receiving relationship with the plurality of light sources (10); one or more fluid transport channels (7) configured in functional contact with one or more of (i) the reactor (30) and (ii) one or more of the plurality of light sources (10); a cooling system (90) configured to transport a cooling fluid (91) through the one or more fluid transport channels (7).

A reactor that operates with ultraviolet light emitting diodes (UV-LEDs) to attain UV photoreactions or UV photo-initiated reaction in a fluid flow for various applications, including water purification. The UV-LED reactor is comprised of a conduit means for passing fluid flow, an ultraviolet light emitting diode (UV-LED), and a radiation-focusing element to focus the UV-LED radiation to the fluid in the longitudinal direction of the conduit. The UV-LED reactor may include photocatalysts or chemical oxidants, which are activated by UV emitted by UV-LEDs for photocatalytic and photo-initiated reactions.

The present invention provides a water purifying device that may include: an upper cover that is configured to have an inlet for liquid; two or more light source modules that are configured to include a light source that emits a UV ray; two or more light guide plates that are configured to guide, to the front, the UV ray that is incident through the lateral side thereof from the light source module to then be output; a purifying plate that is configured to provide a flow path through which liquid flows, and that is configured to provide a plate-type photocatalyst that is disposed on the flow path so that the UV ray emitted from the light guide plate reaches the plate-type photocatalyst in order to thereby purify the liquid; and a lower cover that is configured to have an outlet for the liquid.

A membrane module and a membrane separating method for processing liquids, that includes: the liquid stream of a liquid to be processed is supplied, via an inlet, to a separating membrane designed as a flat membrane, such that a purified permeate passes the separating membrane; and the separating membrane is irradiated by UV light at least on the side of the separating membrane facing the inlet, the irradiation by UV light occurring by means of a mat and/or a fabric and/or a grating and/or a net, which consists, in full or in part, of optical waveguide fibers which out-couple light laterally, forming an irradiation element.

A UV reactor for disinfecting water. The UV reactor may include a cooling chamber in which heat from a UV source may be transferred to the water flowing through the UV reactor. The UV reactor may include driver circuitry operable to determine status information, such as health, of the UV source. The UV reactor may include a gas discharge path operable to substantially prevent accumulation of gas within a water treatment chamber.

Embodiments of the invention include an elongate chamber. A UV source includes a semiconductor device, the semiconductor device including an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. The semiconductor device is positioned on a wall of the elongate chamber. An inner surface of the elongate chamber is reflective.

A mobile sterilization assembly, a mobile sterilization device, and method for sterilization using a mobile sterilization device are described for providing a low-cost and compact sterilization system using an ultraviolet light-emitting diode for sterilization. In an implementation, a mobile sterilization assembly includes a sterilization assembly couplable to a mobile device with a controller, the sterilization assembly including at least one light dispersive element; and an optical coupler configured to couple the at least one light dispersive element to a mobile device; where the at least one light dispersive element at least one of transmits and disperses light from at least one light-emitting diode or transmits light to a photodiode, where the at least one light-emitting diode or the photodiode are configured to be communicatively coupled to the controller.

Provided is an air treatment apparatus comprising an air flow generator arranged to generate an air flow, a moisture source arranged to introduce water vapour into the air flow, a body that in use surrounds both air flow generator and the moisture source, and a water supply system arranged to provide water to the moisture source. The water supply system comprises a water tank assembly separable from the body, the water tank assembly comprising a water tank, a water supply pipe arranged to convey water from water tank, and an ultraviolet light source arranged to irradiate the water passing through the water supply pipe. The water tank comprises a tank opening and the water tank assembly further comprises a removable tank cap that is arranged to fit over the tank opening, with the ultraviolet light source and the water supply pipe being provided on the removable tank cap.