Combined gas mask and transforming method of its structure

本发明揭示了一种组合式防毒面罩系统，它具有可互换的面部透镜以及诸如全面罩型密封或兜罩之类的主体密封。同时，还揭示了一种从全面罩型防毒面罩变换到兜罩型防毒面罩或者反过来的方法。在一种实施例中，完成透镜变换可以不改变主体密封的形式。在另一种实施例中，有一呼吸空气传送导管连接到面部透镜上，并可与面部透镜一起在主体密封之间进行互换。 A modular respirator system has interchangeable facial lenses and body seals such as a full facepiece seal or a hood. A method of conversion from a full facepiece respirator to a hood respirator, or vice versa, is also disclosed. In one embodiment, lens conversion is accomplished without changing the type of body seal. In another embodiment, a breathable gas delivery conduit is connected to the facial lens and interchanged between the body seals together with the facial lens.