Introduction to the classification of air purifiers

According to the purification needs, the air purifier can be divided into:

(1) Purified type. If you are located in a moderately humid area, or if the air quality requirements are not too high, then you can purchase a pure air purifier to meet your needs.

(2) Humidification purification type. If it is located in a drier area, the air conditioner is often air-conditioned and dehumidified, resulting in indoor air drying, or high air quality requirements, then choose an air purifier with humidification purification function, it will be the most suitable choice. .

(3) Intelligent type. If you like automation, intelligent monitoring of air quality, or a noble taste, or a more decent gift, you can choose the smart air purifier is the best choice.

(4) Vehicle type. If it is used for air purification in a car, it needs to purify the car's odor, car formaldehyde and other car pollution, and can be placed in the car's air purifier, so the best choice is the car-type air purifier.

(5) Desktop type. That is, it is placed on the tabletop to purify a certain range of air around the tabletop, and to protect the health of the person near the tabletop. If you often sit in front of a computer, at a desk, or at a desk, but the indoor area is not small, or in a public place, it is not cost-effective to buy a large air purifier. Type air purifiers are a good choice.

(6) Large and medium-sized. Mainly used in large indoor areas, such as home halls, senior bank offices, senior executive offices, important lecture halls, high-end hotels, hospitals, beauty salons, kindergartens and other occasions.

(7) Central air conditioning system type. It is mainly suitable for the case where a central air conditioner or a single room with a ceiling or multiple rooms are cleaned together.

According to the application field, it can be divided into: household air purifier, car air purifier (also known as car air purifier), medical air purifier, industrial air purifier and engineering air purifier.

According to the purification method, it can be divided into the following types:

1. Low temperature asymmetric plasma.

2. Chemical preparations. The main products are air fresheners (vehicle perfumes), whose products are inexpensive, but they can only cover up some odors, and complex chemical reactions occur under the action of sunlight, which becomes a new pollution in the car and cannot eliminate harmful gases at all.

3. Chemical decomposition. The main working principle is the ionizer ozone generator, which has low price and more functions than freshener. It can increase the amount of negative ions in the air and reduce the solid dust in the air. It has a bactericidal effect but has little effect on the decomposition of formaldehyde and other harmful gases. The ozone generator produces a large amount of high-concentration ozone. It can kill human white blood cells while killing some virus bacteria. It may cause cancer. Negative ions are easy to adsorb dust, which adheres to the inner wall of the compartment, resulting in special interior compartments. It is a light-colored car that will gradually turn grayish black.

4. Adsorption and evaporation. It is a purifier with Chinese herbal medicine as the medium. It has low price and has certain antibacterial function. However, Chinese herbal medicine can hardly purify in the solid state. The use of Chinese herbal medicine in purifier is only a trace amount. After saturation, it can not only be sterilized but also become bacteria. The reproduction body, the replaced filter element involves the difficulty of harmless treatment.

5. Adsorption. Activated carbon filter can adsorb certain bacteria and dust and harmful gases in a short time. It is cheap and can filter certain bacteria and dust. It has no selective adsorption, and the adsorption rate to water is 45%, generally one month. After that, it can reach saturation and needs to be replaced. Unable to recycle. After reaching saturation, it can not only be sterilized but also easily become a proliferation of bacteria. The replaced filter element also involves difficulties in harmless handling.

6, multi-layer filtration. Mainly for the composite purifier, the filtering effect is better, the solid dust in the air can be obviously reduced, but the price is high, and the filter device needs to be replaced after being used for a period of time, and cannot be regenerated, and has no effect on harmful gases. More consumables and high cost of use. The replaced filter element involves difficulties in harmless handling.

7. Catalytic and decomposition. It is mainly a photocatalyst purifier, which can decompose some harmful gases, and the price is relatively low. However, the photocatalyst is still in the experimental stage. The technology is not yet mature. The photocatalyst must rely on the ultraviolet light in the sunlight to produce the effect. The ultraviolet lamp is easy to be damaged and replaced frequently. Ultraviolet rays are harmful to the human body and plastics.

8. Filter adsorption. The hydrophobic crystalline silica molecular sieve is mainly used as a filter medium. The effect is obvious. It can completely remove a variety of harmful gases such as benzene, xylene and chloroform. It does not adsorb water and air, and can effectively absorb a variety of harmful gases. The amount of adsorption is large, and it can be used for one and a half years in one regeneration. The filter material can be desorbed and regenerated using a simple method without creating a new source of contamination. The material has a life span of up to ten years and thus the maintenance cost is extremely low. It has little effect on reducing solid dust in the air, and is more expensive than other products.

Air purifiers are divided into three categories based on their working principles:

The first category is passive purification (filter purification), the second is active purification (no filter type), and the third is dual purification (active purification + passive purification). The third type is the more mainstream form, which is the dual purification of the combination of strainer and sterilization technology. This type of air purifier is capable of sweeping away dust, pollution, odors and toxic gases in the air. For the purification effect of toxic gases hidden in the air, there will be corresponding national certification standards, and special attention should be paid when purchasing.