With the rapid development of cities, smog has become a "urban disease". We must all know about the harm of haze to human beings, and it is also a long-term project to control haze. In order to protect their health, most friends choose active defense, such as wearing anti haze masks when going out and using air purifiers at home. As the first choice of anti haze products for thousands of families, the air purifier is favored by everyone with its efficient purification effect. However, the air purifier is not a product that can be turned on and off. If you want to use it for a long time, you must know HEPA filter screen.
HEPA (High efficiency particulate air filter), which means high efficiency air filter in Chinese, is a HEPA standard filter screen with an efficiency of 99.7% for 0.1 μ m and 0.3 μ m. HEPA network is characterized by that air can pass through, but small particles cannot. It is a PM2.5 killer. It can also catch mold, bacteria and viruses. It can be used in areas with poor air environment to protect users' respiratory health.
It can remove particles with a diameter of less than 0.3 μ m (1/200 of the hair diameter) with a removal efficiency of more than 99.97%. It is the most effective filter medium for pollutants such as smoke, dust and bacteria. If there are family members who smoke at home, it is necessary to choose HEPA filter air purifier in order to protect the next generation from the harm of second-hand smoke.
PP filter paper, glass fiber, composite PP PET filter paper, melt blown polyester non-woven fabric and melt blown glass fiber. Although the materials are different, they all have one thing in common: large wind resistance, large dust capacity, and high filtering accuracy. In addition, there are three HEPA efficient filters. One is super HEPA efficient filter, which can purify 99.9995%. One is an antibacterial non partition high efficiency air filter, which has antibacterial effect and prevents bacteria from entering the clean workshop. The other is a sub HEPA high efficiency filter screen, which was cheap and used for less demanding purification spaces before.
You must be able to maintain HEPA filter screen if you want to filter the air purifier efficiently for a long time. If there is no specific indication, it cannot be washed. However, under the current domestic severe indoor air pollution, the life of HEPA filter screen is generally only 3 months or less, which means that HEPA filter screen needs to be replaced frequently. Although the replacement cost of HEPA filter screen is relatively high and its service life can be extended to a certain extent by cleaning with a vacuum cleaner, it is recommended to replace the HEPA filter screen as soon as possible in order to ensure the air filtering effect and health, if its white surface tends to be black. In addition, HEPA filter screen has been produced in a large scale, and the cost and price are also constantly declining, so it is very convenient to replace the filter screen.