A few days ago, the new crown pneumonia epidemic once again fought back, Shanghai, Shenzhen, Jilin, Beijing and other cities appeared infected people, spring and warm flowers should go out to play in the season has been firmly bound by the epidemic.
It is reported that the new crown pneumonia virus transmitted this time is mainly Omikerong, which has the characteristics of extremely fast transmission speed, which is also one of the reasons why the epidemic prevention and control is particularly difficult. As one of the most important means of transportation for daily travel, automobile manufacturers have also launched effective epidemic prevention measures, that is, "N95-level air conditioning filters" to intercept the virus outside the vehicle.
Like other N95-level protective products, this air conditioning filter has a very effective filtering effect on viruses in addition to having a good pacing effect on dust in the air.
Here to do a popular science, the reason why it is called N95, is because under the NIOSH standard in the United States, the mask for electromigration equivalent diameter of 0.3um (300nm) sodium chloride aerosol filtration efficiency is greater than 95%. N is Non-oil, which is suitable for filtering non-oily particulate matter.
Like our gasoline, on top of the N95 protection class, there are two more expensive filtration grades , the N99 and N100 , which have 99% and 99.97% filtration performance, respectively. However, considering the cost performance, manufacturing yield and epidemic prevention effect, the N95 finally stood out.
Many professional partners believe that the diameter of the virus is 80-120nm, and the N95 particle filtration performance is 300nm, which cannot prevent the virus at all, in fact, this cognition is not accurate. Although the virus is small in size, it does not exist alone in the air, but depends on the aerosol carrier, and the volume of this vector is comparable to the virus, so as long as it can block the aerosol, it will indirectly block the virus, or can play a very good isolation effect.
So, in the current automotive market, which auto brands have launched N95-level air conditioning filter products?
The first is definitely the "technology pioneer" Tesla, in the domestic model Y, imported model S and model X these three models, are equipped with HEPA air conditioning filter, and its volume is also several times larger than the general air conditioning filter.
Tesla's "biological weapons defense" model, which Tesla has always claimed, is also based on the HEPA air conditioning filter. After switching to this mode, the vehicle will quickly evolve the air inside the car, and through a specially designed ventilation system, positive pressure will be formed in the cabin to prevent external pollutants from entering the car.
Of course, this model is very easy to use, maintenance prices are not cheap, taking model S as an example, material cost + man-hours cost of 1391 yuan, is not a small expense.
Domestic car brands have actually launched CN95 protection level of air conditioning filters, compared to Tesla's HEPA, although they are slightly inferior in terms of filtration effect, but the price is only one-tenth of the latter, which can be described as economical.
Geely's CN95 filter has a filtration efficiency of more than 95% for particle dust with a particle size of more than 0.3 microns, especially for 0.7 micron droplets like the new coronavirus that are often attached to the filtration efficiency of 98%, PM2.5 interception efficiency of more than 99.9%. It is reported that all Geely car owners (models on sale) have a chance to replace the CN95 filter element for free. Not only in geely brand models, Geely Group's brands such as Lynk & Co, Extreme Krypton, and Volvo have also launched corresponding filter cartridge products.
Great Wall Motors is also one of them, as early as the early stage of the outbreak of the epidemic in 2020, Great Wall Motors invested heavily in the research and development of CN95 air conditioning filters, and obtained the product certification certificate issued by China Automobile Research Institute.
In addition to high-efficiency filter paper, Great Wall's CN95 filter element also adds activated carbon adsorption technology to achieve better filtration effect through relatively low cost. In the Great Wall's Wei brand, Haval, cannon and other products, they have achieved the full popularization of CN95 filters.
Of course, not only Geely, Great Wall, Tesla, as of now, the original car brand equipped with CN95 grade air conditioning filter has been very common. Even if your car has not launched this level of air conditioning filter, you can also buy the corresponding products produced by third-party brands online according to the model, and the effect of isolating viruses will not be much worse.
Therefore, in this round of epidemic, everyone must protect themselves and quickly arm their cars!