View the evolution of air purifiers from 3 aspects

　　The recent rise in attention to air quality has also boosted the sales of air purifiers. In the process of purchasing an air purifier, more people may focus on the removal of PM2.5. Whether it can effectively remove PM2.5 is important, and it is also the first factor to be considered, but this time we will not talk about it for the time being, because there are still some places that are not easy to notice, such as the air supply method and the humidification method. This article takes Panasonic, a veteran purifier company with more than 50 years of air purifier sales history, as an example.

　　Air Purifier Evolution

　　In order to meet new market demands, in recent years, air purifier-related technologies have achieved amazing progress. For example, for pollutants in the air, from "only inhalation" to "active capture", instead of "removal after spreading", it is changed to "diffusion prevention", and improving "energy saving and maintenance" "At the same time of performance, promote "slim down".

　　The basis for this "multi-faceted evolution" is the rapid progress of the three technologies of "airflow control", "sensing" and "humidification", which has now become a must-have for air purifiers.

　　Airflow Control:

　　Air purifiers use strong air supply to form airflow in the room, so that the purified air can reach the entire room. Kinoshita, head of the Air Purification Group, Technology Division 1 of the Healthy Air Quality Business Group of Panasonic Environmental Systems, introduced, "In order to remove indoor dust as soon as possible, we have been paying attention to the air quality (the type of dirt and the amount of dirt that is 30 cm above the floor)". Since 2007, the company has adopted a new method of setting up a special air inlet for indoor dust in the lower part of the front of the air purifier." This technology evolved into "Mega Catcher" two years later, making the front side panel of the air purifier. Moving diagonally upward, in addition to the top and both sides, the air inlet at the bottom is also enlarged, which improves the indoor dust purification power. With the newly developed method, the suction power of indoor dust has been greatly improved, but the challenge of the technicians continues.

　　air purifier

　　Kenichi Murata, Counselor of Panasonic Air Purifier R&D Team, recalled: "In order to remove indoor dust more effectively in a shorter period of time, we have repeatedly carried out trial production and experiments, such as installing baffles at the air inlets, or opening the panels diagonally. , widen the lower part." The "further evolution" previously thought almost impossible was achieved by a bold shift of thinking. The researchers' focus was not on inhaling dirty air, but on the potential of the "air flow" created by blowing fresh air.

　　Next, the R&D personnel began to conduct repeated experiments and continue to explore. Murata said, “We made various air outlet prototypes at that time, such as lengthening the blades or changing the shape to a dome shape. We also performed computer simulations and repeated experiments using dry ice smoke that has a trajectory similar to that of indoor dust. "

　　They finally came to the conclusion that "two independent blades" are used.

　　air purifier

　　Simulation comparison experiment. The airflow blown out by one blade (left) is easy to spread, so the airflow intensity will drop rapidly, and there will be residual indoor dust in the corner of the room. The airflow controlled by the double vanes (right) can reach the indoor dust while maintaining the original strength, and inhale it without spreading it.

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