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Xiaomi Mijia Air Purifier 4 Lite review

It’s time to use air purifiers again. Many people have purchased Xiaomi Mijia Air Purifier 4 Lite like me. But I want to ask you guys, have you bought the right air purifier? Before, I bought an air purifier from a certain brand for $300. The air purification effect is not to be said, but I always feel that it is not very comfortable to use.

First of all, I use it in the bedroom. Even if the silent mode is turned on, I can always feel the sound of the air purifier working in the dead of night. Secondly, it only supports remote control operation but does not support APP control. In addition, the remote control is very small, and sometimes it isn’t easy to find the remote control. In addition, the air purifier is large and crowded in the bedroom, so I always want to replace it.

Mijia Air Purifier 4

Because the smart home products added to the home are the Mijia family in the past few years, my goal for my replacement is to buy a Mijia air purifier. There are 8 air purifiers on sale in Mi Home Store. After careful parameter comparison and volume comparison, the Mijia Air Purifier 4 Lite just launched by Xiaomi was finally selected. Of course, the sassy and square appearance of Mijia Air Purifier 4 Lite also attracted me to a certain extent, and it is more manly when placed at home.

Mijia Air Purifier 4

Choosing Mijia Air Purifier 4 Lite is very simple; it is small. It is 53.35 cm high, 24 cm long and wide, and is almost half the size of the air purifier I used to use. In addition, the Mijia Air Purifier 4 Lite has a very small footprint.

Mijia Air Purifier 4

I studied the official website parameters of the Mijia Air Purifier 4 Lite. Its structure is not complicated. The overall Use is anti-oxidation ABS, which is more durable than ordinary engineering plastics. Structurally, the lower half is the air inlet, with a built-in air filter, and the densely packed holes in the lower half are the air inlets. The upper part is the air outlet, with a built-in high-efficiency fan, and the top is a horizontally symmetrical grille. Unfortunately, the grille does not have a detachable design like the Mijia Air Purifier 4.

Mijia Air Purifier 4

Mijia Air Purifier 4

There is a touch button on both sides of the horizontal bar grille on the top of Mijia Air Purifier 4, the power button on the left, and the mode switch button on the right. Press the mode switch button in the power-on state to switch between three operating modes: automatic, sleep, and favorite.Mijia Air Purifier 4

Like the previous Mijia air purifiers, Mijia Air Purifier 4 Lite is equipped with a circular LED digital display, supporting three numerical displays of PM2.5, indoor temperature, humidity, and operation mode WIFI status display, night. You can reduce the screen brightness or directly turn off the screen. In addition, the bottom is also equipped with a three-color light bar to provide intuitive feedback on indoor air quality. The green light indicates fresh and clean air, the yellow light indicates moderate or mild air pollution, and the red light indicates heavy air pollution.

Mijia Air Purifier 4

Mijia Air Purifier 4

The Mijia Air Purifier 4 Lite is also equipped with a high-precision laser sensor, which can be seen by opening the back cover, and the sensor can be cleaned with a hairdryer later. It can be said that this sensor is the most important part of the Mijia Air Purifier 4 Lite. It is with it that the Mijia Air Purifier 4 Lite can monitor the air quality in real-time and detect small air Particle changes to m³. In addition, the power interface and the display switch key are all on the back of the air purifier.

Mijia Air Purifier 4

For the first few Mijia air purifiers, I am not satisfied with the design of the power connector because the air purifier needs to be placed at least 20 cm away from the wall. The power interface of the old air purifier is basically at the bottom. The in-line power connector is used, making it easy to wrinkle the power connector when placing it, affecting the service life. The Mijia Air Purifier 4 Lite uses an L-shaped power connector this time, which is more practical, but the charging head is much larger, slightly affected when used.

Mijia Air Purifier 4

Mijia Air Purifier 4

The Mijia Air Purifier 4 Lite supports filter element replacement, and the filter element is placed in the filter element compartment in the lower half of the air purifier. Its filter element compartment is opened in a very special way. A release button is pushed inward on each side of the air purifier body. Press the release button on both sides with both hands simultaneously, lift the upper part of the cleaner upwards, and remove it from the filter element compartment. Just take out the old filter. After replacing the filter element, you need to press the power button and the display switch button at the same time to reset the filter element in the standby state.

Mijia Air Purifier 4

The Mijia Air Purifier 4 Lite has four built-in high-efficiency filter elements. The primary filter, antibacterial coating, high-quality filter material, activated carbon filter, and the previous Mijia air purifier filter elements are from the outside to the inside. Compared with an additional layer of antibacterial coating. The antibacterial coating can effectively inhibit and inactivate harmful bacteria such as Escherichia coli and Staphylococcus aureus, and the antibacterial rate is as high as 99.99%. It is especially suitable for infants and the elderly prone to allergies or having poor resistance.

Mijia Air Purifier 4

Although the Mijia Air Purifier 4 Lite is equipped with physical buttons, I prefer to control it through the Mijia APP. After binding the Mijia APP, I can also perform voice control through Xiaoai classmates, which is easier to operate. Power on the Mijia Air Purifier 4 Lite, and then click Add Device in the upper right corner of the Mijia APP, and the APP will automatically search for nearby devices. After scanning the Mijia Air Purifier 4 Lite, click to start the connection and follow the prompts to complete the crucial step by step.

On the Mijia APP, you can perform routine operations such as switching the machine on and off, switching between automatic, sleep, and favorite modes, and adjusting the display’s brightness. If you want to set the automatic shutdown, you can set a fixed time in the timer switch. In addition, you can turn off the operation beep, turn on the child lock, check the usage time of the filter element, and even set up smart usage scenarios to achieve linkage with other devices.Mijia Air Purifier 4

The functional area of Mijia Air Purifier 4 Lite is 26-45 square meters, and the fastest can deliver 6330L of clean air per minute. In contrast, the total area of my home is about 130 square meters, and the bedroom area is about 15 square meters, so it is more than enough to use it in the bedroom. Even if used in the living room, it is completely sufficient. Turn on the sleep mode at night, keep the LED digital display screen, no light and noise interference, and sleep all night peacefully. In addition, the energy consumption of Mijia Air Purifier 4 Lite is level 1, which means lower energy consumption and more power saving.

Mijia Air Purifier 4

To test the purification effect of Mijia Air Purifier 4 Lite, I deliberately ordered a plate of mosquito coils in the room. After half an hour, the PM2.5 value displayed on the Mijia Air Purifier 4 Lite APP was 600, while the Smartmi PM2 The PM2.5 value displayed by the .5 detector is also 600, and the difference between the two values is similar (the multiple numerical tests are close). It can be said that the PM2.5 concentration is directly on the table.

Mijia Air Purifier 4

After measuring the PM2.5 value, turn on the Mijia Air Purifier 4 Lite first, and you can feel the strong wind. After 5 minutes and 30 seconds of operation in automatic mode, the PM2.5 value began to drop. After 6 minutes, the PM2.5 value dropped below 500, and after 8 minutes, the PM2.5 value dropped to around 300.

Mijia Air Purifier 4

In less than 10 minutes, the PM2.5 value drops below 200, and in 12 minutes and 44 seconds, the PM2.5 value drops below 100. The Mijia Air Purifier 4 Lite automatically switches to mid-range wind power and the three-color light bar changes from red to yellow.

Mijia Air Purifier 4

At 14 minutes and 56 seconds, the PM2.5 value dropped to around 70, the three-color light bar changed from yellow to green, and the Mijia Air Purifier 4 Lite automatically switched to the breeze. By 17 minutes and 52 seconds, the PM2.5 value dropped below 50.

Mijia Air Purifier 4

At the same time, in other rooms far from the air purifier, the PM2.5 data measured by the Smartmi PM2.5 detector is around 40. It can be seen that the air purification efficiency of the Mijia Air Purifier 4 Lite is very high. High, for a room with a small area, such a “small” Mijia air purifier is completely sufficient.

Mijia Air Purifier 4

Since replacing the old air purifier with Mijia Air Purifier 4 Lite, I instantly feel that the bedroom space has increased, and children no longer worry about accidental bumps. In general, the Mijia Air Purifier 4 Lite is very worthy of Use in small-sized families. Although it is smaller, it reduces the space occupied and consumes less energy. The overall air purification efficiency is also good. The antibacterial rate reaches 99.99%, the CADR of formaldehyde is 120m³/h, and the CADR of particulate matter is 380m³/h. Moreover, the air purifier 4 Lite operates more quietly. The noise is as low as 35.8dB(A) in sleep mode, almost completely ignoring its “existence”, which is more suitable for families with the elderly and infants.

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