Mijia fresh fan experience： close the window for ventilation, fresh to forget the existence of PM2.5.

　　Haze has made people aware of the existence of PM2.5, serious diseases have made people aware of the harm of formaldehyde, and air purification products have gradually gained recognition from the majority of users. But users who have in-depth understanding know that although air purifiers have obvious effects, they actually treat the symptoms rather than the root cause. The ultimate solution for indoor air purification is a fresh fan.

　　Xiaomi, which used to revolutionize the air purifier market with its signature price/performance ratio, is here again with a new fan. The average price of high-performance new fans over 10,000 is the threshold for its low awareness and popularity. Now Xiaomi is ready to break the industry’s profits again.

　　On November 6, the official Weibo of Mijia officially released the Mijia fresh fan. The price of 2XXX was reasonable and unexpected. As for whether this product really provided extremely high performance at a very low price, the Global Network Technology Channel was invited to experience it in advance to bring you a first-hand experience.

　　A fresh fan is to an air purifier what an air conditioner is to a refrigerator

　　Does indoor air purification require only an air purifier? Of course not.

　　Air purifiers can purify indoor air quickly and efficiently, which is an indisputable fact, but the source of indoor air is still outdoor. If the outdoor air is out of the meter, you can’t open the window, and if you don’t open the window, you can’t ventilate. Even if there is an indoor air purifier, it just keeps self-circulating, and the concentration of carbon dioxide will get higher and higher. Finally, you have to open the window to introduce the outdoor air containing oxygen, and then use the air purifier to purify it.

　　But opening the window once, polluting the indoor air once, and then purifying it again and again, this operation will repeatedly harm health. And directly opening the window and using an air purifier is exaggerated to say that it is equivalent to purifying the entire atmosphere (impossible to do), just like opening the refrigerator door and trying to use the refrigerator to cool the entire room. The self-circulation of the air purifier will naturally make the indoor air cleaner and cleaner, but the air quality is not only an indicator of PM 2.5. At present, carbon dioxide has been included in the current indoor air Quality Standards at home and abroad, and there is a broader consensus that talking about air quality without carbon dioxide is a hooligan. Air that lacks oxygen, no matter how clean it ****** also dangerous to life. This is the importance of fresh fans.

　　From the perspective of the Mijia new fan, the lower part of the trend has a punch or so, which directly introduces the outdoor air, and then filters through the lower, middle and upper layers to send the trend air from the top, which solves the problem of oxygen-containing air source.

　　What kind of fresh fan is Mijia fresh fan?

　　When people hear "fresh air", they are often linked to "fresh air system", which actually refers to the central fresh air system. Generally, air is sent into each room through pipes, which needs to be installed before decoration (hard installation). Most of them are ceiling type, which is more popular in Europe and the United States. However, the central fresh air system occupies a floor height, and it is inconvenient to replace the filter screen. The total cost of final purchase and installation is generally more than 30,000 yuan.

　　As people pay more attention to air quality, the demand for fresh fans after installation has increased, and wall-mounted fresh fans have appeared on the market, which is the category that Mijia fresh fans belong to. The cost of wall-mounted fresh fans is generally around 10,000 yuan, and they can be installed at any time without laying pipes. The installation of Mijia fresh fans only takes two hours, and the bottom air inlet hole is still reserved on the side. Users with insufficient wall space in their homes can install them horizontally. If the property does not allow openings, glass openings can also be selected. Therefore, Mijia fresh fans are very competitive in terms of economic cost and energy cost.

　　The Mijia fresh fan adopts a touch-sensitive OLED display screen, which can be operated directly after displaying the value. The design of the whole machine follows the simple style of Mijia, and it does not violate the integration into the home design.

　　In terms of working principle, the Mijia fresh air fan uses a DC inverter fan to intake air from the bottom air inlet hole, and passes through the lower anti-mosquito filter, the middle-layer medium-efficiency filter, and the upper-layer H13 high-efficiency filter, for a total of three layers of filtration. The anti-mosquito filter adopts a box design to block large particles such as outdoor mosquitoes; the medium-efficiency filter has a removal rate of 80% for particles above PM 0.4; the H13 high-efficiency filter has a power efficiency of more than 99.97% for particles above PM 0.3, and the sterilization rate of Staphylococcus albicans is > 99.9%.

　　What’s more eye-catching in terms of parameters is that the Mijia fresh fan has a ventilation capacity of 300m3/h, which is the high performance of about 10,000 yuan of products on the market. It can ventilate a family with a usage area of 105 square meters 1.1 times an hour. However, the quality of the product still needs to be determined by the actual experience.

　　Actual use effect

　　In order to verify the purification effect of the Mijia fresh fan, we conducted a simulation test: using dry ice to increase the indoor carbon dioxide concentration, using toilet water to simulate indoor formaldehyde and other tVOC pollutants, and closed the window and closed the door in the bedroom (about 30 square meters) where the Mijia fresh fan was installed. When there is severe hypoxia and the aroma is tangy, the data of the Qingping air detector shows that the instantaneous carbon dioxide concentration in the house reaches 4713 ppm, and the tVOV concentration reaches 4.46mg/m3. Far beyond the reasonable indoor range: carbon dioxide below 1000ppm and tVOC should be between 0.2 and 2mg/m.

　　Half an hour later, when we entered the bedroom again, there was already a slight chill, the air was as cold as if the window was open, the smell of perfume was impossible, and the air was very fresh. At this time, the reading of Qingping’s air detector showed that the concentration of carbon dioxide was 508 ppm, and the concentration of tVOC dropped to 0.859 mg/m3. In fact, when the test was carried out for 15 minutes, the concentration of tVOC had reached a reasonable range of close to 1 mg/m3.

　　After the actual test, the ventilation effect of the Mijia fresh fan is indeed obvious, and if installed in one room, it can actually ventilate the whole family, just like opening the balcony window.

　　The most impressive thing is that when you stand in front of the machine with the window closed, you can only hear the noise of the outdoor road, and you can’t feel the operation of the machine at all. It is understood that the Mijia fresh fan is only 35.4 decibels under the maximum air volume, and the sleep mode is as low as 20.4 decibels, which is basically half of the general noise of commercial products.

　　At this point in our experience, we almost forgot about PM 2.5. The original value has been reduced from 6.3 to 2.2. It seems that as long as it is turned on, the indoor air quality has no need to worry at all. But some users may wonder, Mijia fresh fan does not have activated carbon filter element, how to remove formaldehyde?

　　In fact, the air purifier uses activated carbon to absorb formaldehyde only for collection and storage, and there is a risk of secondary volatilization when the indoor temperature is high. The fresh fan uses a continuous ventilation method to let formaldehyde squeeze out of the door and window seams with the "micro-positive pressure" formed by the fresh air entering the house.

　　It is worth noting that formaldehyde does not only exist in houses that have just been renovated. Over time, cracking of wooden furniture joints and tilting of the skin will cause the originally sealed formaldehyde to continue to evaporate, so continuous ventilation is the way to treat the symptoms and root causes.

　　When Mijia products are as ubiquitous as air

　　Users who have paid a little attention can feel that Mijia’s products have become more and more abundant. Nowadays, air purification products have also extended from air purifiers to fresh fans. As long as they are users who can shop online, they all have one or two Xiaomi ecological chain products. They are really as ubiquitous as air.

　　While Mijia products bring benefits, what’s more important is to string together smart life. Mijia new fan also supports Xiao Ai voice control, which can synergy with other Mijia smart home products. Of course, there are also mobile phone remote control switches, air volume adjustment, electric auxiliary heat adjustment, check the status of consumables, etc.

　　Obviously, no matter how consumption is upgraded or downgraded, our spending on health cannot be saved, and air is the most important element for survival. Therefore, we also hope that with the promotion of Xiaomi, more users will understand the necessity of buying new fans and make the right choice for the health of their families.