Ultraviolet light kills including bacterial propagules, bacilli, branching bacilli, coronaviruses, fungi, rickettsiae and chlamydia, etc., where the surface of the object contaminated by the above viruses, water and air, can be sterilized by ultraviolet light.
Precautions for use:
One, in the use of ultraviolet light irradiation sterilization, should be prohibited in the presence of people to avoid injuries due to ultraviolet light directly into the eyes and skin.
Second, ultraviolet light is not penetrating, linear propagation, there are three major sterilization blind spot:
1, can only give the object (food) on the surface of sterilization, can not give the object under the surface of sterilization.
2, more than one object overlap, can not give the object overlap part of the surface sterilization.
3, can only give the object outside the surface sterilization, can not give the object inside the sterilization. That is to say, ultraviolet light (invisible light) can not irradiate the place can not play the role of sterilization.
4, in the use of the process, should keep the surface of the ultraviolet lamp clean, generally every two weeks with an alcohol cotton ball wipe, found that the surface of the lamp with dust, oil, should be wiped at any time.
5, with ultraviolet lamp disinfection of indoor air, the room should be kept clean and dry, reduce dust and water spray, the temperature is lower than 20 ℃ or higher than 40 ℃, the relative humidity is greater than 60% should be appropriately extended irradiation time.
6, the use of ultraviolet disinfection of the surface of the goods, the surface should be irradiated by ultraviolet light directly, and should reach a sufficient irradiation dose.
Expanded information:
Ultraviolet lamps are commonly used in:
(1) in the application of surface sterilization, UV surface sterilization devices are widely used in Food, electronics, semiconductors, liquid crystal displays, plasma TVs, crystal vibrators, precision devices, chemicals, medicine, health care, biology, beverages, agriculture and other fields.
UV light source irradiation of food, materials and other surfaces, with rapid and efficient, non-polluting sterilization effect, so as to maintain the high quality of the product. Compared with traditional sterilization methods, surface sterilization has a fast sterilization speed, can be continuous and batch processing, simple operation, environmental protection without secondary pollution and other characteristics.
(2) in the application of water treatment. The use of ultraviolet germicidal lamps for water treatment have immersion and overflow two methods, directly into the water, the ultraviolet lamp is called immersion; ultraviolet lamp into the casing used, called overflow.
Currently, the main method used is the over-flow method. Over-flow type of equipment is the working principle of the water pump to generate pressure of a certain flow rate of water, flow through the periphery of the quartz casing that can penetrate ultraviolet light, ultraviolet lamps produce ultraviolet light on the water for disinfection, sterilization.
It is characterized by the water flow rate is very fast, generally in the quartz jacket flow through the time for no more than 1s, so the requirements of germicidal lamps of ultraviolet intensity is very high.
(3) in the application of medical environmental health. The use of ultraviolet disinfection lamps for air sterilization in the hospital has been decades of history, there are static air direct irradiation method and flow air disinfection method.
Static air direct irradiation method using ultraviolet disinfection lamp direct irradiation, the disadvantage is that the irradiation of the place can not be disinfected, disinfection can not be present. Flow air disinfection method using dynamic air disinfection machine, this disinfection machine can make up for the above two defects.
The working principle of mobile air disinfector is through the indoor air circulation, through the disinfector air sterilization, so as to achieve the purpose of the entire indoor air disinfection. The structure of this type of sterilizer is mostly taken from the shell of the indoor unit of the household air conditioner.
Mobile air sterilizers have developed into various types of sterilizing equipment, including sterilizing air conditioners and air purifiers. The use is also popularized, used to be used only in hospitals, the product is now going to the home, office, the announcement of the place. Functionality is also diversified, in the past only used to sterilize the product can now be used for health care, preventive role, become a health-related products.
(4) Sanitation and aseptic disinfection is a necessary requirement for the production and processing of filled and packaged food. Sterilization using UV lamps is a commonly used cost-effective and extremely environmentally friendly alternative to the frequent use of chemical processes.
1. Surface Sterilization of Packaging Materials: In filling plants, bacteria on surfaces are killed by the short-wave UV-C radiation to which they are exposed. The degree of purity of packaging materials is used to determine whether the packaging materials are substandard packaging.
Ultraviolet disinfection is used, for example, in filling machines for daily necessities and beverages, in the refrigeration of lids, cups, covers and foil packages for beverages as well as for dairy products and other foodstuffs. Because of the UV sterilization technology, Heraeus UV lamps can extend the shelf life of food products.
2. On conveyor belts: applications in the transportation of meat, fish, potato products, fruits and vegetables. To further improve the economic effect will have to further strengthen the hygiene process in food processing.
3. Sterilization of food surfaces: e.g. surface sterilization of fruit and vegetable products and hard cheese.
Source: Baidu Encyclopedia - Ultraviolet Sterilization Lamps