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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,rezultati prepustnosti zraka in učinkovitosti filtracije so vedno par nasprotij. Če je učinek filtracije dober,pogosto se boste počutili zadušene. Dihalni ventil je zasnovan za lajšanje zadušitve.
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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,ali če ga bodo zataknili majhni delci, so that the air carriers who don & #39;t pass through the filter layer can take advantage of harmful particles. Therefore,medicinske maske nimajo dihalnega ventila. Ob istem času, 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,zlasti kadar je okolica razmeroma slaba.
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