Working Characteristics of a Mechanical Insufflation-Exsufflation Device

Figure 2

Structures of the ventilation system and equivalent pneumatic system: 1: compressor, 2: solenoid valve 𝐴, 3: solenoid valve 𝐵, 4: throttle 𝐴, 5: container 𝐴, 6: throttle 𝐵, 7: container 𝐵, 8: vacuum pump, 9; combination 𝐴, and 10; combination 𝐵.

(a) Simplified mechanical ventilation system

(b) Equivalent pneumatic system