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What is the protective effect of kn95 / N95 respirator with breathing valve?
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kn95 / N95 masks also have breathing valve and no breathing valve. For respirators,rezilta yo nan pèmeyabilite ki nan lè a ak efikasite filtraj yo toujou yon pè nan kontradiksyon. Si efè filtraj la bon,ou pral souvan santi étoufè. Se valv la pou l respire fèt yo soulaje asfiksi.
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The exhalation valve and the inspiratory valve are mechanical switches. They close when inhaled and open when exhaled. The air passes through the filter & quot;screen & quot; once. When exhaled, the valve opens to reduce the sense of resistance. The problem is that people don & #39;t know if the mechanical switch will break down suddenly when they wear it,oswa si li pral kole pa ti patikil, so that the air carriers who don & #39;t pass through the filter layer can take advantage of harmful particles. Therefore,mask medikal pa gen okenn valv pou respire. An menm tan, we also call on the general public to choose kn95 / N95 mask or medical surgical mask without breathing valve as much as possible during the anti epidemic period,sitou lè anviwònman an twò pòv.
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