自给式呼吸器是使人的呼吸器官、眼睛和面部完全与外界受污染空气隔离,依靠面具本身提供的氧气(空气)来满足人的呼吸需要的一类防护面具,主要由面罩、供气系统和背具构成。面罩的结构和性能与过滤式防护面具面罩基本相同。呼吸器按供气系统的供气原理可分为贮气式、贮氧式和生 Self-contained breathing apparatus is a type of protective mask that completely separates human respiratory organs, eyes and face from polluted air and relies on the oxygen (air) provided by the mask itself to meet human respiratory needs. The self-contained breathing apparatus is mainly composed of a mask, an air supply system And back with makeup. The structure and performance of the mask is basically the same as that of the filter mask. Respirator by the gas supply system can be divided into the principle of gas storage, oxygen storage and students