reported in June 15th, according to the American hunt news website, odditycentral.com. A recent invention of two talented children in Hong Kong has revolutionary significance for promoting world health and strengthening infection control. Their new invention is a doorknob. The difference is that it can be automatically sterilized every time someone touches it. It is reported that the two teenagers are from the Li Lifen Memorial Middle School of the Chinese Christian Association in Tuen Mun in Hongkong. The two are 17 year old Wang Sunming and 18 year old Li Jinpang.
the new invention came from two teenagers' daily observations. Careful two people first notice that the doorknob, the staircase handrails, and the handlebars of the shopping cart are exposed to a large number of people every day, so it is a place where bacteria are very easy to grow. Therefore, they decided to find a way of automatic sterilization to help solve this problem.
after a lot of thinking and experiments, they finally designed the automatic sterilization door handle which was in line with the assumption. The door handle is cylindrical, made of transparent glass, and has a bracket at each end of the handle. On one end of the bracket, they placed LED lamps that could emit ultraviolet light. As long as someone touches the door handle, the gear box placed on the door can convert the kinetic energy into electric energy, so that the LED lamp on the bracket can get the energy needed, the ultraviolet light is emitted and the titanium dioxide coating on the handle surface is activated, which can quickly kill all kinds of bacteria attached to the door handle and make the door handle. Keep away from bacterial interference.
laboratory tests showed that the effective sterilization rate of the facility was as high as 99.8%. What is worth mentioning is that the production cost of this high-tech facility is only 13 US dollars (about 81 yuan). This invention has attracted much attention at this year's Intel international science and technology exhibition.