On September 26, Xiaomi released the latest Mijia Air Purifier 4. The biggest improvement is the addition of catalytic activated carbon to the filter element. Compared with traditional air purifiers, it has an additional formaldehyde removal function.
Everyone knows that newly-decorated rooms or newly-purchased furniture, because of the release of formaldehyde, often cause the room to be put on hold for several months before moving in. Now the appearance of Mijia Air Purifier 4 has solved this problem to a certain extent.
The Mijia Air Purifier 4 uses an E12 filter element with a filtration efficiency of about 95%. The built-in fan supports 6 speed modes, the maximum air volume is 400m³/h, and the CADR value of particulate matter and pollen is also 400m³/h. Compared with the previous generation, the ability to remove formaldehyde has increased by 2.5 times, and the CADR value of formaldehyde is 150 m³/h.
In addition to the upgrade of the filter element, Mijia Air Purifier 4 has many upgrades compared to the third generation:
- An antibacterial and antiviral coating is added to the filter element, which can inactivate some bacteria and viruses.
- Added negative ion function to make the air fresher. This feature is turned off by default and needs to be turned on using the Mijia APP.
- The top grille is detachable for easy cleaning of the air duct.
- Compatible with the filter element of the previous generation Mijia Air Purifier 3.
The filter element grade E12 belongs to the sub-high efficiency grade, with a filtration efficiency of 95%. The biggest difference from previous generations of products is that this filter element is also added with catalytic activated carbon, so it also has a certain ability to remove formaldehyde.
After adding catalytic activated carbon, Mijia air purifier 4 also has a certain ability to remove formaldehyde. However, activated carbon is very easy to saturate, so after a period of use (usually about 1 month), the filter element needs to be taken out to dry and ventilate to relieve it, otherwise it may become a source of secondary pollution. In terms of usage cost, the filter element of Mijia Air Purifier 4 needs to be replaced every 3 to 6 months.
In addition to formaldehyde, this filter element also has bacteria and anti-virus double coatings that can inactivate bacteria and viruses and prevent cross-infection. The antiviral rate of H1N1 virus, the antibacterial rate of Staphylococcus aureus, and the antibacterial rate of Escherichia coli all reached 99.99%.
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