The breathing apparatus for micro dust filtering with exhaust valve in the norse mask

摘要

The present invention relates to a fine dust-eliminating respirator comprising an exhaust valve on a nose mask. More specifically, the present invention relates to a fine dust-eliminating respirator comprising an exhaust valve on a nose mask so as to prevent a flow of exhaled breath back into a filter. To this end, the exhaust valve is installed on the nose mask which is connected to the filter by a soft connection hose, and the width of an exhaust path where the exhaust valve is installed tapers toward the exhaust valve so as to reduce pressure on the exhaust path when releasing exhaled breath, thereby allowing the exhaled breath to be released through an exhaust hole without introduction into the connection hose. Accordingly, the exhaled breath does not enter back into the nose by the back flow into the connection hose when breathing in.