[Problems]

To implement UVC energy irradiation at a unified amount to a target for sterilization and decomposition of all in a fluid that is flowing, by greatly increasing a depth of a fluid that receives radiation from a UVC light source significantly to increase a rate at which UVC energy per unit irradiates the target of sterilization and decomposition in the fluid, in continuous sterilization of fluids by UVC irradiation in a container optically shielded from the outside.

Means for Solving the Problem

In order to allow the entire fluid flowing into the container to flow out of the container with the same in-container movement time, the container is equipped with one or a plurality of bulkheads composed of highly UVC permeable material at an angle to receive a maximum radiation from the UVC light source; an opening at one end through which the fluid passes is disposed to be positioned at an end of an opposite side mutual next to the other thereby allowing the fluid flowing into the container to flow in layers along the bulkheads; bending one after the other from the openings in the bulkheads to further flow layers forms a series of overlapping flow layers over the entire area of the container, irradiating the UVC through these layers.

A piping device for improving effects of irradiating fluid has a body, a passage module, and multiple light-emitting elements. The body has a cavity and multiple slits. The cavity is disposed inside the body. The multiple slits are disposed through the body at spaced intervals, and communicate with the cavity. The passage module has a transparent tube and a guiding component. The transparent tube is disposed in the cavity of the body. The guiding component is spiral, and is disposed in the transparent tube. The multiple light-emitting elements are mounted to the body in the multiple slits separately, and surround the passage module.

A ventilation ring for a UV water sanitizer unit that allows for adequate ventilation of heat generated by electronic components while sequestering those electronic components from water. The ring can also be made of a transparent or translucent material to allow a user to detect whether a UV lamp within the housing is operating. An improved nut for affixing a quartz tube within such a unit and improved design for draining the unit are also disclosed.

An active flash-light treatment system is configured to degrade organic pollutants in a liquid stream. The system includes a reactor configured to receive the liquid stream, a light source configured to generate an emitted light having a first wavelength range, an upstream sensor configured to measure a characteristic of the liquid stream before entering the reactor, and a controller configured to analyze the characteristic of the liquid stream and to select a wavelength-conversion material for the reactor, based on the characteristic of the liquid stream. The wavelength-conversion material is configured to absorb the emitted light and generate a converted light having a second wavelength range, different from the first wavelength range, and the converted light irradiates the liquid stream to degrade the organic pollutants.

This disclosure relates to water treatment devices that utilize photocatalytic oxidation to generate oxidizing agents. A water treatment device is configured to be connected in line between a water supply and a washing machine. Wash water from the water supply passes into the device and through a conduit of the device. A reaction chamber includes an ultraviolet lamp and a catalyst cell for generating the oxidizing agents. The generated oxidizing agents are injected into the wash water as it passes through the conduit. The water treatment device also includes a flow sensor placed in line with the conduit to determine when the device should be activated to generate the oxidizing agents.

An apparatus for use in a liquid treatment process, and a method of use is described. The apparatus comprises an inlet configured to be connected to a source of liquid to be treated and an outlet for discharging liquid from the apparatus. At least one liquid treatment vessel or conduit is disposed between the inlet and the outlet, and is arranged to expose liquid in the vessel to ultraviolet radiation in an advanced oxidation process reaction. A source of ultraviolet radiation extending along the liquid treatment vessel or conduit, such that an annular flow volume is defined in the vessel or conduit around the source of ultraviolet radiation. A rotary device is disposed in the annular flow volume and a drive mechanism drives rotation of the rotary device. The rotary device is operable to induce cavitation in a liquid present in the annular flow volume.

The present invention generally relates to a system for treating a fluid and specifically to a treatment system configured for improved bacterial reduction, wherein the system comprises a field emission based UV light source adapted to emit light within a ultraviolet C (UVC) spectrum with a wavelength range having an upper range limit being higher compared to light emitted from a mercury based UV light source.

The present invention generally relates to a field emission light source and specifically to a field emission light source adapted to emit ultraviolet (UV) light. The light source has a UV emission member provided with an electron-excitable UV emitting material. The material is at least one of LuPO.sub.3:Pr.sup.3+, Lu.sub.2Si.sub.2O.sub.2:Pr.sup.3+, LaPO.sub.4:Pr.sup.3+, YBO.sub.3:Pr.sup.3+ and YPO.sub.4:Bi.sup.3+.

A method and an attachment assembly for supporting a quartz sleeve, comprises at least one vibration resistant member, a collar attachment member and a support plate. The at least one vibration resistant member is adaptable to hold and support the quartz sleeve positioned inside an ultraviolet (UV) cylinder and thereby to prevent its vibration. The collar attachment member is configured to enclose the at least one vibration resistant member. The at least one vibration resistant member is positioned inside the collar attachment member. The support plate is configured to attach the collar attachment member containing the at least one vibration resistant member with the UV cylinder. The attachment assembly can be attached to the UV cylinder wall directly or can be attached to a mounting device inside the UV cylinder wall.

A photocatalytic filter including first photocatalytic particles each of which is a composite of an adsorbent and titanium apatite, second photocatalytic particles each of which is glass coated with titanium apatite, a light source configured to emit ultraviolet rays, and a container accommodating the first photocatalytic particles, the second photocatalytic particles, and the light source.