Electronic expansion valve

An electronic expansion valve, comprising:

• a valve body, the valve body having an accommodating cavity and a valve port, and the accommodating cavity being in communication with the valve port;
• a rotor, the rotor being arranged in the accommodating cavity;
• a stator assembly, the stator assembly being arranged outside the valve body in a sleeving manner, and the stator assembly being arranged corresponding to the rotor;
• a screw rod assembly, the screw rod assembly being arranged in the accommodating cavity, the screw rod assembly comprising a screw rod and a nut sleeve, the nut sleeve being fixed to the valve body, the screw rod being arranged in the nut sleeve in a penetrating manner and being in threaded connection with the nut sleeve, the rotor being fixedly connected to an end of the screw rod away from the valve port, and the rotor driving the screw rod to rotate along the nut sleeve such that the screw rod and the rotor move in a direction toward or away from the valve port;
• and
• a valve sleeve, the screw rod being in driving connection with the valve sleeve, and the valve sleeve being used to block or open the valve port,
• wherein when the valve port is in a fully close state, a number of pulses is 0, when the valve port is in a fully open state, a number of pulses is A, and when a central line of the stator assembly that is perpendicular to an axis coincides with a central line of the rotor that is perpendicular to the axis, a corresponding number of pulses is B, wherein 0.3*A≤B≤0.7*A.