43 results about "UVC Radiation" patented technology

The present invention relates to a sterilization unit consisting of a cubical enclosure which uses a sequenced supply of ozone and ultraviolet radiation in the C band (UVC) wave length to sterilize. In use, an article to be sterilized is positioned atop a glass plate mounted between two sources of UVC radiation sources and ozone is first supplied to the enclosure for a period of 15 seconds to 60 minutes followed by a supply of UVC radiation for a period of 15 seconds to 60 minutes.

A box-type sterilizer using C-band Ultra-Violet (UVC) radiation is based on a hollow rectangular box with a door on one end. Mounted proximate to the interior surfaces of the box are lamps that, when powered, produce UVC radiation. In operation, an object to be sterilized is placed inside the box, the door is closed and the lamps are briefly powered. Any DNA-based organisms present on the object to be sterilized are killed by the UVC radiation. Cross tubes of quartz glass, which are transparent to UVC radiation, are used to support the object to be sterilized and separate the object to be sterilized from the lamps on the bottom interior surface. Cross tubes of quartz glass are also used to separate the object to be sterilized from the lamps on the other interior surfaces.

A cabin disinfection system for an aircraft, including: a sensing means (3, 11, 13) to sense the presence of personnel in one or more zones (16-19, 23-26, 28, 29, 30, 32), a predictive sensing means (3, 11, 13, 33) to sense the direction of motion of a person (31) and to predict whether that person will occupy a zone to be disinfected (18) during planned disinfection, one or more UVC radiation sources (4, 9) to disinfect the cabin, and a controller (33) to control operation of the UVC radiation sources (4, 9) dependent on sensing of personnel in that zone and the predictive sensing means (3, 11, 13, 33) predicting that a person (31) will occupy the zone (18) during the planned disinfection period.

The present invention provides an ultraviolet radiation system which generates UVC radiation with maximal radiation output and little or no degradation in radiation output during operation of the lamps. The system provides UVC radiation at a wavelength of 253.7 nm, which is effective to kill or deactivate pathogens on surfaces irradiated by the emitted UVC radiation and is simultaneously effective to decontaminate air which passes uniformly over the entire length of the UVC lamps. Uniformly flowing air cools the lamps to maximize the conversion efficiency of power input to the lamps to UVC radiation from the lamps, and at the same time decontaminates the flowing air such that air in the room is also decontaminated.

A device for generating ultraviolet radiation by means of an excimer discharge, which device is equipped with an at least partly UV-transparent discharge vessel whose discharge space is filled with a gas filling, with means for triggering and maintaining an excimer discharge in the discharge space, and with a luminescent material that contains a phosphor comprising a host lattice of general formula (_Y1-x-y-z,Lu_x,Sc_y,A_z)PO₄ wherein 0≦x<1 and 0<y≦1 and 0≦z<0.05 and A is an activator selected from the group of bismuth, praseodymium and neodymium is useful for disinfection and purification of fluids and surfaces and provides improved germicidal action. The invention also relates to a UVC-phosphor comprising a host lattice of general formula (Y_1-x-y-z,Lu_x,Sc_y,A_z)PO₄ wherein 0≦x<1 and 0<y≦1 and 0≦z<0.05 and A is an activator selected from the group of bismuth, praseodymium and neodymium comprising a improved emission spectrum. Such UV-C phosphors show a high quantum efficiency (>80%) and a strong absorption of 170 to 190 nm radiation. These phosphors emit UV-C radiation comprising a broadened band in the wavelength range between 225 and 275 nm.

A UVC disinfection system which produces a dosage of UVC radiation sufficient to kill Clostridium difficile and other pathogens in a simple fast and unique manner. The system is especially useful for sterilizing and disinfecting medical ultrasound probes or transducers. The system in one embodiment comprises an enclosure for housing a plurality of UVC lamps which are disposed around a central area in which an ultrasound transducer can be disposed. The lamps are disposed in a vertical orientation, as is the transducer and provide 360° of UVC radiation around the transducer for effective and efficient decontamination. The UVC lamps can also be provided at the bottom of the enclosure. The system is controlled by an electronic controller which typically is a microprocessor based controller for control of the ballasts for the UVC lamps and having associated control switches and displays. The current input to the ballasts is monitored by the controller to assure that the UVC lamps are operating properly. A UVC radiation sensor provided in the housing monitors radiation intensity from the lamps. If the current and/or radiation intensity is below reference levels, the system is shut down by the controller.

An ultraviolet disinfection system to generate UVC radiation inside athletic clothing, gear and other items to be decontaminated. The system includes a plurality of UVC lamps vertically disposed in a housing and having UVC transmissive lamp enclosures over which items to be decontaminated are placed. The system has a microprocessor based controller and can kill pathogens including Clostridium difficile in 30 seconds or less.

The invention discloses a method for preparing a human fibrinogen preparation. The method comprises the following step: with healthy human plasma as raw material, separating and purifying by a low-temperature ethanol protein separation method, wherein a centrifugal method is replaced with a mild filter press method; top washing is carried out on sediments by using a low-temperature ethanol solution; a multi-stage deep filtration is added; a freeze-dry process is improved; the freeze-dry cycle is shortened to 2-3 days from 4-8 days; and inactivation treatment is carried out on viruses by combining an S/D method, a UVC radiation method and a dry heat process, so that the removal effect on lipid envelop viruses and non-lipid envelope viruses, especially heat-resistant parvovirus is ensured. The invention also discloses a fibrinogen preparation prepared by the method. The fibrinogen preparation produced by the method has the advantages of relatively stable quality, relatively low impurity content, and relatively high virus safety; the safety risk which can be brought for a patient by the infusion of the preparation can be reduced to the maximal extent; side reaction during clinical application is reduced; and medication is relatively safe.

A system for disinfecting fluid includes a UVC LED. The UVC LED includes an LED chip configured to emit UVC radiation and a package coupled with the LED chip. The LED chip has a top surface that defines a chip top surface area. The top surface is formed from a semiconductor material having an index of refraction. The fluid reactor has at least one wall that defines a chamber configured to contain the fluid. The at least one wall has an aperture configured to receive UVC radiation into the chamber. The aperture extends through the at least one wall. The aperture has an aperture area that is (1) smaller than a top surface area of the package and (2) equal to or larger than the chip top surface area.

The present disclosure provides a method of providing an adhesive composition comprising the steps of combining crosslinkable composition including: a) a (meth)acryloyl monomer mixture with the b) photocrosslinking agent mixture, and irradiating with UVC radiation to polymerize and crosslink the composition.

The invention relates to, UV-converter for transforming radiation of wavelengths above 200 nm to UVA and UVB radiation, having at least a light transmitting sheet (11, 12), with a luminescent coating (13) on one side of the sheet. According to the invention, the light transmitting sheet is of a material suitable for filtering out the UVC radiation, the luminescent coating on the surface of the light transmitting sheet is isolated from humidity, and the luminescent material comprises a phosphor for generating a UV spectrum specified for the solarium lamps. The invention further relates to UV-converter, UV lamp arrangement with the UV-converter, and a lighting unit comprising the UV lamp arrangement.

A system for filtering and removing viruses from water supply sources comprises a decontaminating unit (10) inserted between a water source (12) and at least one water supply source (14, 16, 18) of a closed space, a warning controller (36) used for displaying the misoperation of the decontaminating unit (10), which consists of three filters (20, 22, 24) for retaining particles, suspended materials (MES), colloidal substances and bacteria, and UVC radiation lamp (26) for destroying viruses. Pressure sensors (28, 30, 32) make it possible to measure a water pressure at the output of each filter and an UVmeter makes it possible to detect the UVC lamp misoperation. When the alarm controller receives an alarm signal from at least one pressure sensor or from the UVmeter, it closes a water closing means (38) arranged between the water source and decontaminating module.

The invention relates to a flame-retardant polycarbonate composition and a preparation method and application thereof. The flame-retardant polycarbonate composition comprises polycarbonate, SAN, ASA rubber powder, a phosphazene flame retardant, a triazine UV absorbent, a benzotriazole weather-resistant agent, a hindered amine weather-resistant agent, an anti-dripping agent, toner, an antioxidant, a metal deactivator and other processing aids. The polycarbonate composition provided by the invention not only has better UVA and UVB radiation resistance, but also has better UVC radiation resistance so that the aging and yellowing of materials can be effectively prevented; and the flame-retardant polycarbonate composition has good flame retardant property and can be widely applied to ultraviolet sterilization products.

A method of using ultraviolet (UV) radiation to treat an infection in the respiratory system and far infrared radiation (FIR) to treat inflammation. The method uses a light probe inserted into the airway of a patient to apply UV radiation and FIR to a target site in the upper respiratory tract. The UV radiation applied may be broad-spectrum UV radiation or UVC radiation in the 222 nm range. FIR applied may be in the 3-10 μm range. The UV radiation kills any organisms, including COVID-19 and FIR reduces inflammation resulting from infection and subsequent UV treatment. The treatment may be applied to intubated or spontaneously breathing patients and via the oral or nasal passages.

A sanitizer using radiation comprises a hollow housing with an aperture, the housing being generally opaque to the radiation utilized. Mounted to the interior surfaces of the housing are radiation sources that produce radiation when powered. In operation, multiple objects to be sanitized are placed within the interior and the radiation sources powered, thereby sanitizing by radiation any pathogens present on the objects be irradiated. An easily adjustable shelving system that is substantially non-opaque to the radiation utilized, such as wire shelving with minimal opaque surfaces, may be used to support the objects to be sanitized. Depending on size, the portable box allows for multiple objects to be sanitized at the same time. The sanitizer in certain embodiments includes a plurality of UVC radiation sources mounted in the interior of the housing so as to surround the object to be sanitized on multiple sides.

A system includes a mask having a filter. The filter is configured to capture aerosol particles. The filter may be formed from a material that is UVC durable and UVC transmissive. The system also includes a UVC LED configured to emit UVC radiation into the filter.