First of all, the rapid development of the economy produces external effects of environmental pollution, which provides an opportunity for the empty net market. Secondly, the continuous improvement of purchasing power and quality, healthy consumer demand, and the formation of air health management awareness are the core of the long-term development of the empty net market. The driving force, coupled with the current low usage rate of air purifiers, will have great potential and space in the future. The mainstream air purification technologies currently on the market mainly include the following.
1. “HEPA high efficiency filtration technology” with very good filtration efficiency
HEPA is an internationally recognized and best high efficiency filter material, mainly for suspended particulates. HEPA filter air purifier is one of the most common air purifiers in foreign countries. However, currently in China, HEPA filter air purifiers are not welcomed by users. One of the reasons is that China’s air purifier industry started late, users only pay attention to the effect of air purifiers on the sterilization (disinfection) of air, and still do not care about the purification effect of air. In addition, China’s dust is more serious, and the service life of HEPA may be relatively shortened, which means that HEPA filters need to be replaced frequently.
Advantages: The effect of filtering particulate matter is very obvious, the ability to capture particles is strong, the pore size is small, the purification efficiency is high, and the water absorption is provided, and the particle purification rate for the 0.3 micron is 99.97%.
Disadvantages: There are certain restrictions on the adsorption capacity, especially in China, where the dust is relatively serious, and the service life of HEPA may be relatively shortened. When the adsorption is saturated or about to be saturated, there is a very serious secondary pollution that continues to be used. This means that HEPA filters need to be replaced regularly, and the cost of later use is high. And the quality of HEPA on the market is uneven, making it difficult to purchase.
Second, the adsorption capacity is very strong “activated carbon adsorption technology”
For gaseous pollutants. Simply put, it refers to the use of activated carbon to adsorb gaseous pollutants in the air, which is applied to most air purifiers. Activated carbon is divided into three types: coconut shell, husk and coal. The adsorption capacity is the strongest in coconut shell activated carbon.
Advantages: Strong adsorption capacity, can effectively absorb harmful substances (such as formaldehyde, benzene, odor, etc.) in indoor air.
Disadvantages: The adsorption capacity of activated carbon is quite limited. Even the highest grade of coconut shell carbon can only absorb a few hundred milligrams of pollutants per kilogram. Moreover, activated carbon can only be temporarily adsorbed. With the increase of temperature and wind speed, the adsorbed pollutants may be released, so the filter material should be replaced frequently to avoid adsorption saturation.