| 摘要 |
The plug has a solenoid valve for actuating a movable unit (23). The solenoid valve has an annular shaped coil (15) mounted on a body (3) to create a magnetic field, and a spring (24) mounted inside an exhaust duct to exert a permanent force on the movable unit. The movable unit moves between a retracted position related to a recess (19c) of an air exhaust duct (19) to allow a circulation of air between the inlet and outlet ports (18, 20), and a deployed position, in which the unit supports against stops (21, 22) so as to cut off the air circulation between the ports. |
