Throttle Valve

A throttle valve comprising:

• a valve body (1) with an inlet (11) and an outlet (12) disposed on the wall of the valve body (1), provided with a flow passage (13) in the valve body (1) which is communicated with said inlet (11) and said outlet (12), and a mounting hole (14) in the valve body (1) which is communicated with said flow passage (13);
• a valve core movably inserted inside the mounting hole (14), being able to slide relatively to said valve body (1) to change a flow section of said flow passage (13) for regulating a flux of flow passing through said flow passage (13), a sealing mechanism disposed between said valve core and said mounting hole (14) to prevent the fluid entering into said mounting hole (14) from said flow passage (13), an outer end of said valve core extending out of the valve body (1), an inner end of said valve core entering into said flow passage (13);
• a driving mechanism for the valve core disposed out of the valve body (1) and connected with the outer end of said valve core;
• characterized in that the driving mechanism directly drives the valve core to slide axially, said driving mechanism includes:
• a valve seat (2) fixed on said valve body (1), provided with a cavity (21) inside, and the outer end of said valve core entering into said cavity (21);
• a coil (3) disposed in said cavity (21);
• a magnetic element (4) surrounded by said coil (3), which can be driven to slide relatively to said coil (3) by an electromagnetic force generated by said coil (3) when supplied with current;
• an iron core (5) connected with said valve core and said magnetic element (4);
• and
• an elastic part acting on said valve core, a damping force of the elastic part to said valve core resisting the electromagnetic force of said coil (3) to said magnetic element (4).