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

Claim 10:
11. 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 lead screw (2-31), a nut seat (2-32) and a third noise reduction member (2-33) in the at least one noise reduction member, the lead screw (2-31) penetrating into the nut seat (2-32), and the third noise reduction member (2-33) being arranged between the lead screw (2-31) and the nut seat (2-32); wherein the lead screw (2-31) comprises a fixed section (2-311) and an external thread section (2-312), and the nut seat (2-32) comprises an internal thread section (2-321) and an unthreaded hole section (2-322), the external thread section (2-312) cooperating with the internal thread section (2-321), the fixed section (2-311) being arranged corresponding to the unthreaded hole section (2-322), and the third noise reduction member (2-33) being located between the fixed section (2-311) and the unthreaded hole section (2-322).