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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,Los resultados de la permeabilidad al aire y la eficiencia de filtración son siempre un par de contradicciones. Si el efecto de filtración es bueno,a menudo te sentirás sofocado. La válvula de respiración está diseñada para aliviar la asfixia.
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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,o si quedará atascado por pequeñas partículas, so that the air carriers who don & #39;t pass through the filter layer can take advantage of harmful particles. Therefore,Las mascarillas médicas no tienen válvula de respiración. Al mismo tiempo, 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,especialmente cuando el ambiente circundante es relativamente pobre.
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