[Air Purifier Science Series] Selection and Maintenance of Air Purifiers

[Air Purifier Science Series] Selection and Maintenance of Air Purifiers

Nowadays, the smog, decoration pollution of formaldehyde, bacteria and other hidden invisible killers around us are endangering the health of the family. As one of the most effective products for the current air environment, air purifiers have become the first choice for most families.

But in the face of a large number of products with different shapes and performances on the market, how should we choose? Please take a look at the small series below!

Shopping tips

1. Select the purchase channel

When purchasing an air purifier, it is recommended to purchase it in regular channels such as large shopping malls, electrical stores, brand stores, and mainstream e-commerce websites.

2. Purchase an air purifier according to your actual needs

At present, the air purifier brand, function, performance, design, and price are very different, dazzling. Consumers are advised to purchase products according to their actual needs, not as many features as possible. For example, for consumers who need to protect PM2.5, it is recommended to choose an air purifier with an outstanding PM2.5 purification capability.

However, in the case of an air purifier, the purifying function is the most important function. If your requirements for indoor air purifiers are based solely on improving indoor air quality, you can choose a type that simply purifies the air and is cost-effective.

As people’s needs for quality of life increase, the demand for air purifiers is no longer simply to purify indoor air. For example, those who work in a closed air-conditioned room, because the air conditioning dehumidification makes the air in the room very dry and the skin becomes dry, so when choosing an air purifier, you will choose a skin-friendly function. Humidifying air purifier.

People who have been in a lot of people for a long time and have high indoor pollution need to breathe fresh air without bacteria. When purchasing an air purifier, they will prefer a small air purifier suitable for desktop.

People who drive frequently should choose car air purifiers to purify various car odors and even ease driving fatigue.

3. Is there a scientific purification principle to achieve an efficient air purifier effect?

There are five internationally accepted principles of air purification, physical, electrostatic, chemical, ionic and composite. In general, physical purification is the most common and effective method. For example, dust, pollen, allergens, viruses, and other large particulate matter can be filtered by HEPA technology in physical purification mode; while harmful substances such as benzene, toluene, formaldehyde, and other odors can be adsorbed by activated carbon in physical purification mode. Purification.

The strength of the purifying capacity of the air purifier is mainly determined by the applicable area and the amount of clean air (CADR: the rate of clean air provided). The relationship between the two is applicable area = CADR × 0.12. The ability to purify other contaminants should be combined with the applicable area.

4. Are the energy efficiency ratio, energy efficiency rating and ozone emission reasonable?

Air purifiers are usually used continuously for a long time. The energy efficiency ratio is an important indicator for measuring the purifying capacity and power consumption of air purifiers. It is worthy of attention. The higher the energy efficiency ratio and energy efficiency rating, the more energy-efficient the air purifier is and the lower the cost of use.

Ozone as a strong oxidant has a certain purification ability, but it is harmful to the human body. The state has mandatory safety requirements for the amount of ozone released from air purifiers, limited to ≤ 5 × 10 – 6% (ozone has a fishy smell).

Source: “Indoor Air Purifier Purification Performance Evaluation Requirements”

Source: National Standardization Technical Committee for Household Appliances. Questions and Answers on Air Purifiers. China Standard Press. September 2015


Like the water purifier, the air purifier needs to be cleaned regularly, and some need to be replaced with filters and filters to maintain its purification effect. The maintenance and maintenance of the air purifier depend on different types of air purifiers.

The primary filter in the air purifier should be cleaned frequently. Generally, it should be cleaned once every half month. When using a vacuum cleaner or a clean brush, when there is more dust on the fan and electrode, it should be removed. Generally, it should be repaired once every six months. The long hair brush can be used to remove dust from each electrode and wind blade. When the air purifier is not in use, it should be cleaned and put into the box and stored in a ventilated and dry place. Attention should be paid to moisture protection to avoid the use of efficiency or damage due to moisture.


1. The front filter (usually the back cover of the chassis) takes a long time to collect some dust, which affects the air intake and affects the air purification effect. Therefore, it is necessary to use a vacuum cleaner to suck the dust away or use a rag to clean it, or even wash it to dry.

2. Filter net, part of the filter net needs to be taken to the sun at the end of the sun, and the purification efficiency can be better maintained, such as activated carbon filter.

3. Deodorizing filter, a deodorizing filter for a few air purifiers, to achieve the technical level of water washing, can be washed by water, that is, to maintain purification efficiency, and extend the cycle of the filter.

4. The ion generator is generally built-in and does not need to be cleaned. The better ionizer has higher working efficiency.

Second, maintenance

1. Rear panel (front filter)
No need to replace, clean once a month.

2.HEPA filter
Changed in 1 year.

3. Washable deodorizing filter
When changing for 1 year, when you feel that the smell is difficult to remove, you can clean the filter.

4. Humidifying filter
Change it in 2 years and clean the scale on the filter surface once a month.

5. In addition to formaldehyde filter
Changed in 1 year.

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