Purifier useful? Purifier selection strategy

Is the purifier useful? How to choose a purifier is the content of this article for everyone to pay attention to. Recently, air quality in several cities across the country, including Chengdu, has been polluted to varying degrees. The effects of smog and PM2.5 on people's health have received unprecedented attention. For a time, air cleaning products such as air purifiers have been favored. So, is the air purifier useful? How to choose an air purifier? Let's take a look at the experience shared by Xiaobian.

Purifier useful? Pick purifier Raiders

Filter selection strategy

At present, the purchase of air purifiers generally have the following considerations: decoration to taste, remove PM2.5, remove second-hand smoke, and purify pathogens. Some users in dry areas may also have dust removal requirements.

In addition to harmful gases: mainly choose purifiers containing activated carbon filter or photocatalyst filter. At present, photocatalysts in both filters have better odor absorption and use time than activated carbon. With negative ion filter or HEPA filter, each filter can be effectively filtered. Harmful gas and taste. It is more suitable for newly renovated houses that are urgently needed to remove formaldehyde.

Removal of PM2.5/second-hand smoke: Ordinary households can choose a HEPA filter with a relatively low filtration effect. This is a popular filtration technology, but in fact the best air purification filter is a ULPA filter, but the price is too expensive. Therefore, it is generally not used in household air purification equipment.

Purification of pathogens: Air purifiers with disinfection function should prefer photocatalyst filter or ozone filter. Compared with other filters, they are better enough to eliminate viruses, but both have different degrees of defects, from a safety perspective. Considering that the photocatalyst is slightly higher than ozone, and if you want to thoroughly clean the pathogen, you need to use a HEPA filter or an expensive ULPA filter. This type of air purifier is more suitable for patients or families with weaker members.

Dust-based: If the house is mainly dust-removing, you can consider the air purifier with relatively low price and negative ion or electrostatic filter function. At the same time, the technology can also have certain sterilization effect, and it can be well matched with ozone or photocatalyst filter. Remove dust and germs from the house. This type of air purifier is mostly suitable for areas with a good air quality but a dry climate.

Air volume selection

In addition to looking at the filter, the air purifier should also consider whether the air purification rate of the product can meet its own requirements in combination with the purification space. The larger the room, the more the air purifier is selected per unit time. For the calculation method of the applicable area of ​​the air purifier, the following formula can be referred to:

Room area x indoor height x5 = air purification air volume (m3/h) * The indoor height of an ordinary home is generally 2.7 meters.

In addition, it should be noted that the air ventilation rate of an air purifier is limited. It is better to close the vents such as doors and windows to ensure the purification quality when performing air purification work. If large-area air purification is required, it is best to increase the air according to the actual living area. The number of purifiers.

Conscience reminder

It should be noted that the applicable area marked by the current business may be exaggerated, and the area calculated by purifying the air volume is the applicable area for the optimal purification effect of the product itself.

Additional features

At present, the air purifier on the market, in addition to the function of purifying air, has also developed a number of convenient additional functions, such as an indicator function for detecting the degree of purification, and a filter update reminder function.

More popular are the filter update reminder, the purification indicator and other additional functions. Some products also add an air quality sensor, which can sense the air dust to open and clean itself. In addition, it can automatically turn the machine on and off as needed. Timing and sleep functions.

His purchase considerations

The air purifier's ventilator generates large or small noise during operation, so users who need it can also pay more attention to the noise level of each machine when purchasing. At present, the smallest amount of noise is the negative ion air purifier, and other purifiers have noises of about 36dB-70 dB. (According to the “National Noise Standards”, areas with less than 50 dB during the day and less than 40 dB at night belong to the optimal quiet region of category 0, while areas with greater than 70 dB during the day are equivalent to the sides of the main urban road.)

In addition, the purification efficiency of the air purifier will gradually decrease with the increase of the use time. Especially for some products, due to the principle of filtration, adsorption and catalysis, long-term use will cause the filter or filter in the device to become saturated. The purification capacity is reduced and needs to be cleaned and replaced in time.

Therefore, when selecting an air purifier, it is best to choose a purification filter with regenerative capacity (including high-efficiency catalytic activated carbon) to prolong the service life; general static products do not need to replace the relevant modules, as long as they are cleaned regularly. HEPA is a product with a high frequency of replacement and should be taken care of when purchasing.

The above is a small series for everyone to explain about the usefulness of the purifier, and the purifier selection strategy, I hope to help everyone.