791 results about "Disinfection methods" patented technology

The present invention provides a method and apparatus for sterilizing articles using an ozone-containing gas, where condensation of water from the sterilization atmosphere during the sterilization process is substantially prevented. The inventive sterilization method includes providing a sterilization chamber and placing an article into the sterilization chamber. The sterilization chamber is sealed prior to equalizing the temperature of the article and the atmosphere in the sterilization chamber. A vacuum is applied to achieve a preselected vacuum pressure in the sterilization chamber. Once the vacuum pressure is set, water vapour is supplied to the sterilization chamber. Ozone-containing gas is then supplied to the sterilization chamber and the sterilization chamber remains sealed for a preselected treatment period, where the sterilization chamber remains sealed throughout the whole process. Finally, vacuum in the sterilization chamber is released.

An ultraviolet (UV) light disinfection method and apparatus is provided that disinfects produce products such as fruits and vegetables by direct exposure to ultraviolet light. The disinfecting UV light eliminates pathogens, such as molds and bacteria from the surfaces that it illuminates. The produce product is disinfected over its entire surface. The produce product can be rotated on a conveyor, to illuminate all of the exterior surface of the produce product with a disinfecting UV light source. To better respond to produce products of varying height and size, the UV light disinfection apparatus can include an automatic actuator. The automatic actuator maintains the UV light source at a preselected level of separation between the produce product and the UV light source. The automatic actuator is responsive to a height sensor that detects the top height of the produce product.

An ultraviolet area sterilizer or disinfector is incorporated into a building structure where concern exists regarding the presence of pathogenic bacteria on environmental surfaces. Ultraviolet C (UV-C) generators generate UV-C that is directed to architectural partitions of an enclosed area. The architectural partitions reflect UV-C to kill pathogens in the enclosed area. The device transmits a calculated dose of UV-C from a fixture mounted to an architectural partition in the enclosed area. Once an effective cumulative dose of UV-C has been reflected to radiation sensors, as measured by the sensors, the device shuts down.

On-Line and Off-Line methods of simultaneously cleaning and disinfecting an industrial water system are described and claimed. The methods involve the addition to the water of the industrial water system of a Compound selected from the group consisting of the alkali salts of chlorite and chlorate and mixtures thereof; and an acid, followed by allowing the water in the industrial water system to circulate for several hours. The reaction of the alkali salts of chlorite and chlorate and acid produces chlorine dioxide in-situ in the water of the industrial water system. The chlorine dioxide kills microorganisms and the acid acts to remove deposits upon the water-contact surfaces of the equipment. An alternative method involves the use of a chelating agent and a biocide. Other possible cleaning and disinfection reagents may be added as needed including corrosion inhibitors, chelating agents, biocides, surfactants and reducing agents. These cleaning and disinfecting methods work in a variety of industrial water systems including cooling water and boiler water systems.

An air cleaning unit is provided. The air cleaning unit includes a housing having an air intake and an air outlet. Intermediate the air intake and air outlet is an air filtration medium. Also within the housing is at least one UV-C lamp. The air cleaning unit also includes an odor-reducing medium, such as a photocatalytic oxidation (“PCO”). filter. A method for filtering air using the air cleaning unit is also provided.

The invention includes a three-dimensional printing (3DP) machine that has at least one ultraviolet (UV) light source directed at powder or slurry being processed by the 3DP machine and/or directed at any of various surfaces or machine components, in a manner suitable to kill or damage microorganisms to a desired extent. The UV light sources may be either stationary or movable, and may be either pulsed or substantially continuous, and may operate in any desired sequence and timing with respect to other operations performed by the machine. The invention may include ultraviolet illumination in such a way as to interact with powder to sterilize or disinfect powder either while the powder is stationary or, alternatively, as powder is being moved from one place to another within the 3DP machine, or both. The invention also includes methods of performing three-dimensional printing using such illumination. The invention also includes the combination of other methods of sterilization or disinfection with the use of ultraviolet light. The invention also includes the use of ultraviolet light sources for a combination of polymerization/cross-linking in addition to sterilization/disinfection.

The present invention relates to an intelligent monitoring sterilizing cabinet and its automatic monitoring sterilizing method. It is characterized by that it includes a cabinet body, power supply board and control panel placed on the panel of cabinet body. The described cabinet body is formed from upper chamber and lower chamber, an upper chamber heating device is placed in the upper chamber interior, a lower chamber heating device is placed in the lower chamber interior. In the sterilizing cabinet interior an intelligent control system is set, said intelligent control system includes a temperature detection device, a humidity detection device and a computer plate. Besides, said invention also provides the working principle of said intelligent monitoring sterilizing cabinet and its concrete operation method.

Disinfection methods and apparatuses are provided which generate pulses of germicidal light at a frequency greater than 20 Hz and project the pulses of light to surfaces at least 1.0 meter from the disinfection apparatus. The pulses of light comprise a pulse duration and an energy flux sufficient to generate a power flux between approximately 200 W/m² and approximately 5000 W/m² of ultraviolet light in the wavelength range between 200 nm and 320 nm at the surfaces. Other disinfection methods and apparatuses are provided which generate pulses of light comprising germicidal light and visible light from a germicidal light source and generate pulses of light from a visible light source that is distinct from the germicidal light source. The projections of visible light from the light sources produce a continuous stream of visible light or a collective stream of visible light pulsed at a frequency greater than 60 Hz.

A lighting device combined with an air purification feature is disclosed. At least one function of the device is to provide high quality directional light for general lighting purposes. An additional function is to decompose VOCs and/or destroy microbes in the ambient air. The heat generated by white LEDs is utilized to generate air flow through the device. The geometry is designed to utilize the chimney effect and maximize volumetric flow. The circulated air is purified by a photocatalytic layer applied to the interior surface of the device. The lighting device can be built into pendant luminaires or lamps, thus ensuring vertical orientation of the light module. The exemplary embodiments may be applied in public places, hospitals, ward rooms, and other locations where a cost effective disinfection method is needed.

The invention provides a light-emitting diode (LED) ultraviolet fluid disinfection method and a device thereof, wherein disinfection is realize by adopting an LED disinfection component, the LED disinfection component utilizes an integrated high-power density ultraviolet LED light source, so the ultraviolet radiation illumination intensity of a disinfection space is improved to 5-60mW/cm[2]; and a fluid pipeline adopts a bending pipeline, the ultraviolet radiation time is controlled between 0.2-2.5s according to the fluid velocity, so the fluid ultraviolet radiation dose which passes by the pipeline is ensured to be larger than 15mJ/cm[2] (mW.s/cm[2]), the bacteria and virus are killed at one time, and the odour is removed. The disinfection device has the advantages of high efficiency, quickness, small size and multiple functions. The invention can be used for disinfecting the drinking water, milk, soyabean milk and various fluids of hotels, shopping malls, factories, office buildings and other public places or homes and other occasions.

An aqueous cleaning and disinfecting composition is disclosed that is a synergistic combination of (a) a sufficient amount of a chlorine-containing bleach compound such as sodium hypochlorite or sodium dichloroisocyanurate to provide from about 1,100 parts per million by weight of available chlorine level with (b) from about 600 to 800 parts per million by weight of bactericidal quaternary ammonium compounds such as mixtures of didecyldimethylammonium chloride and (C12-C16 alkyl)dimethylbenzylammonium chlorides. Such compositions are tuberculocidal at unexpectedly low concentrations. Also disclosed are two component compositions and methods of disinfecting surfaces containing tubercule bacilli and other pathogenic micro-organisms such as bacteria and viruses.

The present invention relates to a disinfectant composition containing the following components (A) to (D): component (A): a zinc compound, component (B): a chelate compound represented by the following general formula (b1) or (b2), component (C): hydrogen peroxide or a peroxide that releases hydrogen peroxide in water, and component (D): an organic peroxy acid precursor that generates an organic peroxy acid by reacting with the component (C). According to the present invention, a disinfectant composition and a disinfecting method can be provided that enable the effective elimination of gram negative bacteria adhered to textile products, and particularly cotton products.

Disclosed is a method for sterilizing an article with hydrogen peroxide in a reaction vessel, comprising: maintaining an inner space of the reaction vessel at a vacuum pressure lower than an equilibrium vapor pressure of hydrogen peroxide; heating the inner space of the reaction vessel to a temperature from 30 to 60° C.; injecting a hydrogen peroxide solution into the inner space of the reaction vessel; thermally vaporizing the hydrogen peroxide solution within the reaction vessel; sealing the inner space of the reaction vessel and maintaining the article in a hydrogen peroxide vapor atmosphere; and introducing external gas into the inner space of the reaction vessel to increase the pressure of the inner space to a predetermined value not more than the atmospheric pressure. The method allows the effective sterilization of an article having a narrow, long lumen.

The invention relates to the greenhouse crop planting field, in particular to compound microbes for reducing and disinfecting greenhouse soil and a soil disinfection method, and solves the problem of multiple defects in the prior art. The compound microbes comprise bacteria, actinomycetes, saccharomycetes and moulds. The soil disinfection method includes the steps of selecting June to September as a disinfection period to apply crop straws, organic fertilizer and the compound microbes on the soil after the crops are harvested; deeply plowing soil layers to form small ridges; covering ridge surfaces with plastic film, filling enough water under the film till the soil humidity achieves 100%, and sealing the mulching film and covering the greenhouse plastic film for 20 to 25 days; and uncovering the greenhouse plastic film and removing the mulching film for planting. According to the compound microbes for reducing and disinfecting greenhouse soil and the soil disinfection method, the method is non-toxic, harmless, pollution-free and residue-free, pathogenic bacteria, ova and the like in soil plough layers are killed, soil organics are increased, the soil physical and chemical structure is improved, soil fertility is improved, and good foundation is laid for improving product qualities.

The invention relates to procedures of soil disinfection to prevent and wipe out facility vegetable soil-borne diseases, operation steps are as follows: smoothing and watering the soil during the season with high temperature and good illumination to make sure relative humidity of the soil is 65%-80%, liming calcium cyan amide equably 6-100kg per 1000 m2 two days after watering, ploughing under to 30-40cm to make sure that the calcium cyan amide and the soil are mixed equably, confining the surface of the soil with transparent film and the booth or glasshouse totally for 12-20 days. The invention is mainly used for preventing and curing facility vegetable soil-borne diseases of cucumber, tomato, hot pepper, eggplant and so on, caused by pathogeny epiphyte, bacteria and wireworm. The invention prevents and cures soil-borne diseases greatly and duratively, offering vegetables nitrogen, decrease the accumulation of nitrate, accelerating plant growth. Said procedures of soil disinfection are novel to operate with easy steps, low cost, high efficiency and safety, significant economic benefit.

Provided are a fingerprint recognition apparatus including a sterilizing function and a method for sterilizing the same. The fingerprint recognition apparatus includes a sterilizing light source irradiating a sterilizing light on a fingerprint contact surface of a fingerprint sensor to sterilize at all times the fingerprint contact surface which many and unspecified users contact their fingers on repeatedly. Accordingly, it is possible to prevent a route of bacterial infection and improve hygienic conditions.