| 摘要 |
The lung ventilator safety valve includes a valve housing, an armature connected to the valve housing, a shaft mounted at one end to the armature and having a poppet valve seal on the other end for sealing the vent in a valve closed position and for allowing a relief flow in a valve open position. An electromagnetic coil mounted to the valve housing adjacent to the armature when energized urges the armature to the armature closed position, and a return spring urges the armature to an open position. The poppet valve seal has an aperture extending through the poppet valve seal, so that when there is relief flow through the safety valve vent, the relief flow across the poppet valve seal creates a jet venturi effect to cause a negative pressure on the side of the poppet valve seal opposite the relief flow that biases the safety valve to open further. |
