Patent ID: 11959561
Assignee: ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 6:
7. An electronic expansion valve, comprising:
a valve seat (10) provided with an inlet (11), an outlet (12) and a communication channel (13) in communication with the inlet (11) and the outlet (12);
an actuator (20) movably mounted in the valve seat (10), wherein the actuator (20) is provided with a first position to block the communication channel (13) and a second position to avoid the communication channel (13); and
a driving mechanism (30) connected to the actuator (20) to drive the actuator (20) to move between the first position and the second position, wherein the driving mechanism (30) comprises at least one noise reduction member to reduce noise of the electronic expansion valve, wherein the driving mechanism (30) further comprises a rotor (1-36), a lead screw (1-31), a nut seat (1-32) and a second noise reduction member (1-34) in the at least one noise reduction member, the rotor (1-36) being connected to the lead screw (1-31), the lead screw (1-31) penetrating into the nut seat (1-32), the lead screw (1-31) being connected to the actuator (20) by a connection sleeve assembly (1-35), and the second noise reduction member (1-34) being arranged between the lead screw (1-31) and the nut seat (1-32);
wherein the lead screw (1-31) comprises a guide section (1-311), an external thread section (1-312) and a transition section (1-315), a first end of the transition section (1-315) being connected with an end, close to the actuator (20), of the external thread section (1-312), and a second end of the transition section (1-315) being connected with the guide section (1-311).