Mijia Fresh Air Fan: Removes indoor formaldehyde and carbon dioxide pollution in 30 minutes, with air purification standards exceeding those of five-star hotels

Air, sunlight and water are the three fundamental elements for a healthy life and none of them can be missing. Paying attention to these three issues means paying attention to our own quality of life.

When we began to use water filters to let the whole family drink clean water, the problem of air pollution has been difficult to be solved. In fact, there is a solution. Now many noble people who pursue quality of life have taken the lead in installing fresh air systems at home.

However, due to limitations in budget, space, decoration, etc., the expensive (starting at 30,000 yuan) and inconvenient installation of fresh air systems have not become common items that the general public can enjoy. In combating air pollution and indoor decoration pollution, ordinary people like us can only rely on air purifiers, which actually have very limited capabilities.

The new fan released by Xiaomi today is undoubtedly a solution to this problem. Its cost is low enough, only less than 30% of imported products, and it is easy to install. The installation engineers are available at any time in more than 200 cities across the country. In the test, it was found that the effect after installation can really be described in four words, that is, immediate effect.

The air purification effect is immediate

3.522, 2.472, 1.057...0.578.

This string of numbers is the indoor TVOC concentration index half an hour after the Mijia fresh air fan is turned on, and the unit is mg/m³ (milligrams per cubic meter). TVOC (Total Volatile Organic Compounds) means total volatile organic compounds, mainly benzene and benzene derivatives, which exist in large quantities in paints and various adhesives. The well-known formaldehyde is also one of them. On October 27, 2017, the World Health Organization's International Agency for Research on Cancer identified formaldehyde as a Class 1 carcinogen.

In the carbon dioxide test, the superb capabilities of the Mijia fresh air system were once again verified.

We tested it with a basin of dry ice (carbon dioxide). Also within half an hour, the ppm (parts per million) dropped from 4646 to 471.

Humans breathe in oxygen and exhale carbon dioxide. This is knowledge we have known since childhood. Why is carbon dioxide also one of the indicators for measuring whether indoor air is clean? Isn't it something that people breathe out? How can it be harmful?

Here is a little popular science. There is a saying that it is foolish to talk about toxicity without considering the dosage. Carbon dioxide is a typical example.

When the indoor carbon dioxide concentration is below 700ppm, it is not only harmless but also comfortable; but once the concentration reaches 1000ppm, people with sensitive constitutions will start to feel uncomfortable; and when it exceeds 2000ppm, it is considered severe pollution. Long-term inhalation by the human body will cause biological clock disorders, and then produce symptoms such as weak qi and blood, and the specific symptoms are dizziness and wanting to sleep; if the concentration reaches 3000~4000ppm, headaches, tinnitus, and high blood pressure will follow. This is the main reason why people tend to feel sleepy when staying at home, because an adult in a 15m² bedroom with doors and windows closed can increase the carbon dioxide concentration from 450ppm to more than 2000ppm as long as he sleeps for 6 hours.

However, in winter, especially the cold winter in the north, everyone uses heating, and few people are willing to open windows for ventilation every day. Not only is the heating cost unbearable, but the living comfort will also be greatly reduced.

Therefore, the reason why we did not follow the general evaluation order and released the results directly is to emphasize these two points:

1. The room where the test was conducted had been renovated and the odor had been removed for half a year, but the TVOC was still very high. As you can imagine, the environment we usually live in, in addition to the haze outside the window, there are also various carcinogens that are constantly volatile indoors.

2. Fresh air fans are really necessary. If there are permanent residents in your home, you should buy one for the sake of health. After all, health is priceless.

Why do we need a new fan?

Under this subheading, it can actually be concluded in one sentence, which is for health. However, in order to make it easier for readers to understand, I decided to break it down and sort out 10 reasons to talk about them together.

1. There is a large amount of formaldehyde in our furniture decoration, and its slow release period can be as long as 15 years. After the decoration is completed, it is not that opening windows to ventilate can solve this problem. Even if you ventilate for half a year, you will have to keep breathing air containing formaldehyde for the next 14.5 years.

2. Ventilation is not a panacea. As we all know, the haze outside the window is also a strong carcinogen. Let me stop here. Those who understand will understand. Maybe the air you open the window to exchange is more dangerous.

3. The fundamental reason why traditional air purifiers are not very useful is that activated carbon physical adsorption, a commonly used medium in air purifiers, is not the best protection against air pollution. It can temporarily adsorb formaldehyde, but it is extremely easy to saturate, and once the temperature is higher than 20 degrees, the formaldehyde will evaporate again and cause secondary pollution.

4. Traditional air purifiers are not fresh air fans. Fresh air fans continuously blow out filtered fresh air and continuously produce new oxygen, while traditional air purifiers only continuously absorb and neutralize polluted air, and the new oxygen content does not increase.

5. The effect of a fresh air machine is equivalent to opening the windows for ventilation every day, and the effect achieved exceeds that of the huge fresh air system in a five-star hotel.

6. In addition to TVOC and carbon dioxide, the Mijia fresh air fan has a removal rate of 99.9% for PM 2.5, pollen, bacteria, etc. And the entire purification process will not produce ozone pollution.

7. The Mijia fresh air machine will automatically adjust the air supply volume according to the indoor air quality, and it is no longer a rigid same speed. The Mijia fresh air machine is very smart. It can also be linked with the Mijia App and Xiao Ai, so remote control is not a problem.

8. Don’t be afraid of cold weather. When the air temperature is lower than a certain set value, the electric auxiliary heating of the Mijia fresh air fan will automatically start. Basically, no need for maintenance.

9. The fresh air machine is actually very cheap, just the price of a few air purifiers.

10. People who pursue quality of life are using it, why don’t you cherish your health?

The installation of Mijia fresh air machine is actually very simple

Unlike the complex fresh air system, the fresh air fan is basically a simplified version of the fresh air system. The two have the same principle of air purification, and the biggest difference is that the fresh air system can have multiple pipe outlets, which is suitable for noble living environments such as villas. The fresh air fan has only one outlet and can only cover a home environment of about 100 square meters.

For ordinary people, a coverage area of ​​100 square meters is sufficient. Because the main function of the fresh air fan is to achieve "micro-positive pressure" of indoor air. That is, by introducing fresh and clean air continuously, the old indoor air is "squeezed" out through the gaps in the window frames and doors. At the same time, the outdoor polluted air cannot penetrate into the room again through the gaps due to the "micro-positive pressure" in the room, and finally the effect of refreshing the air in the whole house is achieved.

From these two pictures, we can see that the installation of the fresh air fan is actually to connect the indoor and outdoor, and it plays a filtering role. If drilling holes in the wall seems a bit troublesome, then you can drill holes in the window glass, and the effect is the same. The entire installation time generally does not exceed 2 hours. However, it is worth noting that the user needs to pay extra for drilling holes, which is about the same price as the drilling price required to install a range hood.

The consumables of the Mijia fresh air fan only need to be replaced every 3 to 6 months. Compared with the cost of the fresh air system, the cost is already very low.

Thanks to the DC variable frequency fan with plastic magnetic core, the motor efficiency of Mijia fresh air fan can reach more than 70%, which is 10% higher than the efficiency of rubber magnetic core motor. The overall energy consumption is greatly reduced, consuming only 0.84 kWh of electricity in 24 hours, which is equivalent to less than 0.5 yuan in electricity bill.

In addition, the noise of the Mijia fresh air fan has been reduced to 35.4 decibels, which is only half of the common noise of commercially available air purifiers.

It is worth mentioning that while energy consumption and noise are both reduced, the air volume of the Mijia fresh air fan is increasing, reaching an astonishing 300 cubic meters per hour. In just one hour, it can complete 1.1 ventilation changes for a room of 105m² (usable area).

From clean air to a healthy body, the only thing that may be needed is a Mijia fresh air blower. With low cost and pure enjoyment, it is no exaggeration to say that having a Mijia fresh air blower is equivalent to living in a five-star hotel every day.

As a winner of Toutiao's Qingyun Plan and Baijiahao's Bai+ Plan, the 2019 Baidu Digital Author of the Year, the Baijiahao's Most Popular Author in the Technology Field, the 2019 Sogou Technology and Culture Author, and the 2021 Baijiahao Quarterly Influential Creator, he has won many awards, including the 2013 Sohu Best Industry Media Person, the 2015 China New Media Entrepreneurship Competition Beijing Third Place, the 2015 Guangmang Experience Award, the 2015 China New Media Entrepreneurship Competition Finals Third Place, and the 2018 Baidu Dynamic Annual Powerful Celebrity.