Air valve with SMA for switching

An air valve with shape memory alloy (SMA) for switching, which is located in an air chamber where at least two air holes are formed, comprising:

• a base, provided with at least two supporting blocks arranged at an interval, and two conduction components located at the same side of the base and near one of the two supporting blocks;
• an air piston, arranged at the air chamber along an axial direction and used for determining a ventilation state of at least one of the two air holes, the air piston comprising a rod body arranged on the two supporting blocks, and a spring sleeved on the rod body, wherein the rod body is provided with a first triggering part, one end of the spring pushes against one of the two supporting blocks, and the other end of the spring pushes against the rod body;
• a driving component, sleeved on the rod body and provided with a second triggering part matched with the first triggering part;
• and
• an SMA wire, comprising two connecting segments respectively connected with the two conduction components, two actuating segments respectively extending from the two connecting segments and connected with the driving component, and a turning segment connected with the two actuating segments and turned by one of the two supporting blocks, which is opposite to the two conduction components, wherein when the SMA wire is electrified, the SMA wire applies actuating force to the driving component;
• the direction of the actuating force is staggered with the axial direction of the air piston;
• and the air piston generates displacement due to an action of the driving component, so as to switch the ventilation state of at least one of the two air holes.