Breathing valve and protective mask

Abstract

The invention discloses a breather valve and a protective mask. The breather valve comprises a breather valve shell, a valve core and monitoring equipment, and the breather valve shell comprises a base and an outer shell detachably connected with the base; the valve core is fixed in the breather valve shell and comprises a nano-metal filter screen, a sealing element with electronegativity and a conductive electrode, and the sealing element and the conductive electrode are sequentially stacked on the surface of the nano-metal filter screen; the nano-metal filter screen is fixed to the base; and the monitoring equipment is electrically connected with the nano-metal filter screen and the conductive electrode correspondingly. The sealing element with the electronegativity is in periodic contact with the nano-metal filter screen in the expiration stage and the inspiration stage, electric signals are output in a separated mode, the electric signals are monitored, the pollutant accumulation condition on the nano-metal filter screen can be judged, so that whether the filter screen needs to be replaced or not can be easily judged, and waste caused by frequent replacement of the filter screen can be avoided.

Description

technical field [0001] The invention relates to the technical field of personal protection, in particular to a breathing valve seat and a protective mask. Background technique [0002] Mask, as a commonly used protective equipment, can effectively filter the air entering the mouth and nasal cavity, and prevent harmful bacteria, dust, smog and other substances from contacting the mouth and nose. It is a powerful means of pollution protection. [0003] At present, the commonly used protective masks include disposable type, breathing valve type, filter type, etc. Most of them use activated carbon filter layer to absorb pollutants. As the adsorption time increases, pollutants accumulate on the surface of the mask filter layer, and the protective ability of the mask gradually decreases. , the mask or internal filter needs to be replaced. Yet existing mouth mask can't judge the content of the adsorbent on the surface of the mask filter layer, it is easy to make the mask filter la...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a breathing valve and a protective mask, which is used to solve the problem of unreasonable replacement of the filter layer in the existing protective mask or protective mask

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