本文从呼吸器设计的角度出发,引入传质区概念,讨论了呼吸器防护毒害气体过程的传质机理,并介绍用Shilov方程式来表示吸附剂层厚度和防护时间的关系. In this paper, the concept of mass transfer zone was introduced from the perspective of respirator design. The mass transfer mechanism of the protective gas was discussed. The relationship between the thickness of adsorbent layer and the guard time was described by Shilov’s equation.