| 摘要 |
An airflow generator (12) with filtered intake (14) is contained in a soundproofed box (26) and connected to a regulator (18) with an actuator (24) controlling a first output/inhalation valve (20) and a second recirculation valve (22) which directs air back to the generator during controlled exhalation and closure of the first valve. Oxygen (32) may be added to the regulator and a bypass (34) is provided for use during any generator failure. |
