Life support instrument

The invention discloses a life support instrument which comprises a shell, an air pipe, a fan structure, a detection device and a controller. A pipe cavity, a fan cavity and a detection cavity are formed in the shell, the pipe cavity is communicated with the fan cavity, and the detection cavity is communicated with the fan cavity; the air pipe is installed in the pipe cavity, the fan structure capable of switching positive pressure and negative pressure is arranged in the fan cavity, at least part of the detection device is arranged in the detection cavity, the air pipe is connected with the fan structure, and the fan structure and the detection device are both electrically connected with the controller. According to the technical scheme, detection and replacement of air in a limited space are achieved. 本发明公开一种生命保障仪，包括壳体、风管、风机结构、检测装置和控制器；壳体内部形成管腔、风机腔和检测腔，管腔和风机腔连通，检测腔与风机腔连通；风管安装在管腔中，可切换正压和负压的风机结构设于风机腔中，检测装置至少部分设于检测腔中，风管与风机结构连接，风机结构和检测装置均与控制器电连接。本发明技术方案实现了对有限空间内空气的检测和置换。