Recently, several new furniture items have been added to the house, which always feels a bit pungent. Also, autumn and winter in the north are coming, and they have to endure the haze. Decided to buy an air purifier. After all, there are two babies in the house. Fresh air can reduce the incidence of respiratory diseases in babies. I just saw the newly released Mijia Air Purifier 3 on Xiaomi’s official website. I learned about the specific performance parameters, compared the prices, and decided to buy one. Next, I will share with you the experience of using this purifier through experience.
The Mijia Air Purifier 3 is packaged in an environmentally friendly cardboard box with thick foam inside for protection, which can effectively protect against collisions during transportation. The accessories part includes the power cord, quick guide, and instruction manual. I need to mention that the power cord is placed in the filter cartridge of the purifier, and I haven’t found it in the packing box for a long time.
In appearance, the Mijia Air Purifier 3 maintains the white minimalist style of Xiaomi home appliances. The whole body of the machine adopts white as the main color, and there are no too many decorative elements on the outside. The corners of the whole machine are treated with arcs. The comfortable roundness can be integrated into various styles of home decoration elements, which is more versatile. The size of the machine is 240*240*520, and the compact size covers an area of less than 0.1m³, which is very suitable for small households. The weight of the whole machine is 4.8kg, but because there is no wheel design at the bottom, it is a bit inconvenient to move.
In terms of performance, compared with the previous generation of air purifier 2S, it has made many improvements. For example, the CARD value of particulate matter has been increased from 310m³/h to 400m³/h, an increase of 29%. Speaking of this, many of my friends don’t know what the value of CARD really means. In fact, it is the concept of a clean air output ratio. It is also an intuitive indicator of the performance of air purifier products. The greater the clean air output ratio, the cleaner The higher the purification efficiency. The hardware is also upgraded to a backward-tilted centrifugal fan, which can output a larger air volume; coupled with the upgrade of the touch screen and the control of Xiao Ai, this Mijia Air Purifier 3 is relatively cost-effective.
The upper part of the front panel of the machine has a circular OLED touch screen, which can display the value of PM2.5, air temperature, air humidity, and purifier working mode in the surrounding environment through digital means. The touch buttons below can realize automatic Switching between gear, sleep mode, low speed, medium speed, high speed, and favorite gear, the peripheral light color will be red, orange, and green according to the value of PM2.5. When the indoor PM2.5 value is greater than 150, it is displayed in red, indicating that the air quality is poor at this time; when the PM2.5 is 75-150, the indicator light is orange, indicating that the air quality is normal; when it is less than 75, it is green, indicating that the air quality is excellent.
Let’s take a look at the air circulation mode of Mijia Air Purifier 3. Dense small holes are designed on both sides of the fuselage and on the front to ensure that the surrounding air enters the purifier from three sides at a relatively large flow rate for filtration; The tuyere is designed as a large-area grille, which is conducive to rapid and uniform airflow. Simply put, the air purifier draws air into the interior through the three air ducts below, and the filter element filters and then flows out from above, forming a 360-degree air vortex, gradually purifying the indoor air. Mijia Air Purifier 3 can The maximum delivery of 6660 liters of clean air per minute, the purification efficiency is relatively fast.
The rear of the fuselage is equipped with a high-precision laser sensor to monitor the tuyere, which can detect tiny particles and dust, and feedback the PM2.5 value in real-time. On the left is the temperature and humidity detection sensor, which can monitor the temperature and humidity in the air; unfortunately, the device does not have formaldehyde-related sensor detection equipment, such as the formaldehyde value is still very important for newly decorated or families with small babies. There is a screen switch button at the top to adjust the brightness of the screen.
The cover on the back of the fuselage can be easily removed by the upper hand buckle. A contact switch is designed at the connection part of the cover, which means that even when the purifier is working, opening the cover will immediately cut off the power to ensure safety. After opening the cover, you can see the barrel-shaped filter element. Below the filter element is a spring base, which can be pulled out by pressing it down slightly.
The barrel-shaped filter element of the Mijia Air Purifier 3 mainly has three layers of purification effects. The first layer is an initial filter, which can intercept large particles such as hair and dust; the second layer is a high-quality EPA-grade filter that can remove micron-level particles. Fine particles; the third layer is an activated carbon filter, which can effectively adsorb and remove harmful substances such as formaldehyde in the air. And the purifier has the RFID intelligent filter identification function, which can prompt the life of the filter when it is turned on, so that the user can replace it in time. In addition to matching this universal version of the filter element, you can also choose the formaldehyde-enhanced version S1 and the antibacterial version of the purification filter element at Mijia.
The area of the house is about 90 square meters. The official application area of this purifier is 28-48m³, and other factors such as the effective volume of the room must be considered. That is to say, this product can be used in our bedroom, study room or larger living room. Then we will put the purifier in the living room, close the doors and windows of each room, and conduct an actual test.
The living room area is 31 square meters. After smoking two cigarettes, PM2.5 is stable at about 330, because the doors and windows are closed, it feels quite choking. It seems that second-hand smoke is far more harmful than smog, and it is especially detrimental to the growth of children. I think that the commonly used modes are generally automatic purification mode, so the test here also uses automatic mode.
After about 7 minutes, PM2.5 dropped from 303μg/m³ to about 140μg/m³. In order to test more accurately, the 360 Air Detector was also used here to record. The difference between the two data is still relatively small. It is very good that the space of 31 square meters can have such a fast purification efficiency. At first, it is obvious that the purifier is operating in high-speed windshield mode. As the value decreases, the wind speed gear also decreases, and the purification speed starts to slow down.
About 15 minutes, the indicator light of the purifier is green, the PM2.5 value is 74μg/m³, and the 360 air detection master displays 81μg/m³; after 40 minutes, the PM2.5 value drops to 19μg/m³, and the 360 air detection master displays 24μg/m³; the next paragraph The windshield of the time air purifier is very low, and it is almost inaudible. In total, the smell of smoke is almost invisible in the room for about 40 minutes, and PM2.5 has reached a high-quality standard.
In general, this Mijia Air Purifier 3 is good in terms of appearance and purification performance. Compared with the price, it is also very cost-effective, and ordinary households can also afford it. It is more suitable for family use in a small apartment, such as a study room, children’s room, etc. The purification capacity is completely sufficient. After several days of experience and use, several shortcomings of the purifier were also found, which are summarized as follows.
Disadvantages:
1. There is no roller at the bottom of the purifier, so it is inconvenient to move. Although it is not big and heavy, it is still inconvenient to move because it does not have a handle.
2. The purifier is not equipped with remote control. Although there is Mijia APP and voice control, it is still inconvenient to use without a remote control.
3. The purifier has no formaldehyde detection sensor, and the value and purification effect of formaldehyde is not known.
lay 
Rupesh 
John Shen 
Mike Lee-111