Dustproof mask

Abstract

The invention discloses a dustproof mask which comprises a filter device and a breathing device. The breathing device comprises a breathing panel, a one-way air suction valve is arranged on the upper portion of the breathing panel, a one-way exhalation valve is arranged on the lower portion of the breathing panel and comprises a second air inlet through hole and a second circular elastic baffle, the second air inlet through hole and the second circular elastic baffle are arranged at the corresponding positions of the breathing panel, a second support composed of a plurality of edge sets is fixed in the second air inlet through hole, a second protrusion is arranged at the position, on the periphery of the second air inlet through hole, of the surface of the outer side of the breathing panel, the second circular elastic baffle is fixed on the second support and attached to the second protrusion in a sealing mode, and a second spiral spring attached to the surface of the second circular elastic baffle is fixed on the side, far away from the second protrusion, of the second circular elastic baffle. Generation of a gap between the second circular elastic baffle and the second protrusion can be prevented by the second spiral spring; when air is sucked, external noxious air which is not filtered cannot enter the dustproof mask from the one-way exhalation valve, and breathing safety of a user can be effectively protected.

Description

technical field [0001] The invention relates to a filter device for people to breathe fresh air, in particular to a dustproof mask. Background technique [0002] Staff working in dusty environments such as cement plants and coal mines have always faced occupational hazards of lung disease or silicosis due to inhalation of dust. Therefore, they must use dust masks that can purify the air. At present, the traditionally used dust masks are mostly composed of a filter device and a breathing device. The breathing device includes a breathing panel. The device is detachably sealed and connected, the one-way exhalation valve directly communicates with the outside, the one-way inhalation valve includes the first air inlet through hole and the first circular elastic baffle opened at the corresponding position on the breathing panel, the first A first bracket composed of several ribs is fixed inside the air intake through hole, and the inner surface of the breathing panel is provided ...

AI Technical Summary

Problems solved by technology

[0004] After the dust mask with the above structure has been used for a period of time, the first and second circular elastic baffles will be deformed due to fatigue oxidation, and the outer periphery will warp and protrude to form a gap, so that the one-way inhalation valve and the one-way exhalation valve The non-return effect of the valve disappears. When people inhale, the external unfiltered polluted air can enter the breathing device through the one-way exhalation valve and be inhaled by people, which seriously endangers the health of workers; The water vapor in the filter enters the filter device through the one-way suction valve, causing the filter cloth in the filter device to be wet, and the wet filter cloth will affect its air permeability and filtering effect

Images