HEPA air purifier, HEPA filter screen
With the rapid development of the city, haze has also become an "urban disease". Everyone must know about the harm of haze to human body, and controlling haze is also a long-term project. 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 preferred anti haze product for thousands of families, the air purifier is favored by everyone for its efficient purification effect, but the air purifier is by no means a product that doesn't care when the switch is turned on. If you want to use it well for a long time, you have to know HEPA filter screen.
What is HEPA filter? HEPA (high efficiency particulate air filter), which means high efficiency air filter in Chinese, is a filter screen that meets the HEPA standard. For 0.1 micron and 0.3 micron, the effective rate reaches 99.7%. The characteristic of HEPA screen is that air can pass through, but small particles cannot pass through. It's PM2 5 killer can also capture molds, bacteria and viruses. It can be used in areas with poor air environment to maximize the protection of users' respiratory health.
It can remove particles with a diameter of less than 0.3 microns (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 relatives 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.
HEPA can be divided into five materials: 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 filtration accuracy. In addition, there are three HEPA high-efficiency filters. One is super HEPA high-efficiency filter, which can purify 99.9995%. One is the antibacterial high-efficiency air filter without partition, which has antibacterial effect and prevents bacteria from entering the clean workshop. The other is the sub HEPA high-efficiency filter screen, which is cheap and used in the purification space with low requirements before. For our commonly used air purifiers, there are many filters with the latter two. After all, you get what you pay for.
In order to filter the air purifier efficiently for a long time, you must be able to maintain the HEPA filter screen. If there is no specific indication, it cannot be washed, but under the current situation of serious indoor air pollution in China, the longest service 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 high, and its service life can be extended to a certain extent by cleaning with a vacuum cleaner, if the generally white HEPA filter screen surface has tended to black, it is recommended to replace it as soon as possible in order to ensure air filtration effect and health. Moreover, the HEPA filter screen has been produced on a large scale, and the cost and price are constantly declining. It is still very convenient to replace the filter screen.
In short, the key role of HEPA filter screen for air purifier is to effectively filter PM2 5 and other harmful gases can also capture molds, bacteria and viruses, filter second-hand smoke and harmful micro particles in the air, and protect users' respiratory health. It is an indispensable and important part of the air purifier. However, it can not be used in the kitchen, because oil fume will accelerate the loss of HEPA filter screen, and it can not be used in the environment with particularly strong cigarette smell and poor air circulation (such as mahjong Hall). Cigarettes will greatly shorten the service life of HEPA. If it is an ordinary family to prevent haze and purify the air, the HEPA filter screen can be properly maintained according to the above methods. Under normal circumstances, it can be used for several months without changing. It not only saves money, but also purifies the air and protects the respiratory health of the whole family. It is worth choosing for users who want to purify the respiratory environment.
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