Abstract: A partition plate device of a respirator mask includes a partition plate having an upside surface and a downside surface each cooperating with a mask body and a user's face to define an upper chamber and a lower chamber, respectively, a mask connecting rims for connecting against an inner surface of the mask body a user connecting rim for contacting the user's face, and at least one valve hole extending through the upside and downside surfaces and communicating with the upper and lower chambers. A valve unit includes at least one valve flap covering the valve hole and being movable away from the same to permit air in the lower chamber to flow in a single direction to the upper chamber.

Abstract: A partition plate device of a respirator mask includes a partition plate having an upside surface and a downside surface each cooperating with a mask body and a user's face to define an upper chamber and a lower chamber, respectively, a mask connecting rims for connecting against an inner surface of the mask body a user connecting rim for contacting the user's face, and at least one valve hole extending through the upside and downside surfaces and communicating with the upper and lower chambers. A valve unit includes at least one valve flap covering the valve hole and being movable away from the same to permit air in the lower chamber to flow in a single direction to the upper chamber.