| 摘要 |
An exhalation valve employs a valve body (21), a diaphragm (22) and a leak orifice (30). Valve body (21) encloses an pneumatic air passage (28) of patient exhalation air and a pneumatic damping chamber (29) of compressed air. Diaphragm (22) seats within the valve body (21) isolating the pneumatic damping chamber (29) from the pneumatic air passage (28). Leak orifice (30) extends through the valve body (21) into the pneumatic damping chamber (29). In operation, leak orifice (30) cyclically regulates a volume of the compressed air within the pneumatic damping chamber (29) responsive to the diaphragm (22) cyclically regulating a flow of patient exhalation air through the pneumatic air passage (28). |
