Electric valve

An electric valve, comprising a coil assembly, a sleeve, a nut part, a housing and an end cover, wherein a first cavity and a valve port are provided in the housing, the electric valve further comprises a rotor assembly, a rod assembly and a valve core assembly;

• the rotor assembly is connected to one end of the rod assembly, and the other end of the rod assembly is connected to the valve core assembly;
• wherein a second cavity is provided in the sleeve, the rotor assembly is located in the second cavity and includes a screw rod and a permanent magnet, the nut part is threaded on the periphery of the screw rod, and the screw rod is moveable up and down with respect to the nut part to drive the rod assembly to move,
• characterized in that the end cover has a first through hole, and a part of the rod assembly passes through the first through hole and is slidably fitted with a corresponding inner wall of the first through hole, and the electric valve further comprises a sealing member, and the sealing member is away from the valve port with respect to the valve core assembly;
• the sealing member comprises a first cylindrical portion and a membrane portion, wherein the first cylindrical portion has a second through hole, another part of the rod assembly passes through the second through hole;
• the first cylindrical portion is connected with respect to the rod assembly and a junction between the first cylindrical portion and the rod assembly is sealed, and an outer peripheral side of the membrane portion is sealed with the housing and/or the end cover.