Is an air purifier really useful?

With the development of domestic industry, the accumulation of exhaust gases has reached a new historical high, and haze has also become the ultimate result. Human health is also subject to various threats in such turbid air. Air purifiers appear in this context. Is it really useful as an air purifier to filter indoor air? This is indisputably true. Air purifiers do filter out smog-laden air. The following article will explain how home air purifiers work.

In the outdoors, we can only wear a mask and turn it into a "human vacuum cleaner." However, at home, we can choose a suitable air purifier to improve the indoor air quality. Before understanding the air purifiers, let’s look at what air pollutants are in the room. What impact will they have on us?

It is understood that indoor air pollution mainly has eight categories, including dust pollution, particulate pollution, nicotine pollution, kitchen fume pollution, indoor odor, bacteria, viruses, and chemical pollution caused by decoration.

Different groups of people are affected by indoor air pollution to varying degrees. In particular, the elderly and children are more affected by air pollution. Patients with asthma, heart disease, and lung disease are also susceptible to air pollution. In addition, some people are contaminated by indoor air, resulting in memory impairment, reduced ability to respond, reduced ability to abstract spatial thinking, and changes in sensory and behavioral functions, as well as fatigue, insomnia, irritability, and headaches. Indoor air pollution is constantly harming our health.

At present, the general air purifiers on the market can only remove dust, remove oil fumes and odors; a little better can kill bacteria and viruses; high-grade purifiers can eliminate chemical pollution such as formaldehyde and TVOC caused by decoration. In order to better understand the air purifiers currently on the market, we first classify the working principle of air purifiers.

Although the name, type and function of air purifiers on the market are not the same. However, from the roots of the source, from the working principle of air purifiers, there are three main types: passive purification (filter purification), active purification (no filter type) and double purification (active purification + passive purification).

The first major category: passive purification (filter purification)

The main principle of the passive air purifier is that the air is pumped into the machine by a fan, and the air is filtered through the built-in filter, which can mainly play the role of filtering dust, odor, toxic gases and killing some bacteria. Filters are divided into: dust filter, formaldehyde removal filter, deodorant filter, HEPA filter and so on. Among them, the HEPA filter has a relatively high cost, and its effect of filtering particulate matter is very obvious, and it can decompose toxic gases and bactericidal effects, and can suppress secondary air pollution.

The quality of the fan and the filter of this type of product determines the effect of air purification. The location of the machine and the layout of the room will also affect the purifying effect.

The second major category: active purification (without filter type)

The fundamental difference between the principle of active air purifier and the principle of passive air purification is that the active air purifier is free from the limitations of the fan and the filter, and is not passively waiting for the indoor air to be pumped into the purifier for filtration and purification. Instead, it effectively and actively releases the sterilizing and sterilizing factors into the air, and through the characteristics that the air will diffuse, it reaches all corners of the room to clean the air without dead ends.

At present, the technologies for purifying sterilizing factors on the market include silver ion technology, negative ion technology, low-temperature plasma technology, photocatalyst technology, and ion-cluster ion technology.

The third category: double purification (active purification + passive purification)

This type of purifier actually combines the passive purification technology with the active purification technology.