| 摘要 |
An electronic expansion valve. A valve needle component (3) thereof is provided with an axial mounting hole (31), the bottom end of a screw rod (61) is provided with a screw rod spacing part (611), and extends into the axial mounting hole (31), and the opening end of the axial mounting hole (31) is provided with a valve needle spacing part (32) which blocks the screw rod spacing part (611); a compressed elastic component (72) is also arranged between the screw rod (61) and the valve needle component (3); and a preset buffer distance exists between the bottom end of the screw rod (61) and the bottom wall of the axial mounting hole (31). When a coolant flows in a reverse direction, the structural design of the electronic expansion valve can simplify a control program on the one hand, and can avoid the problem that the screw rod is stuck because the valve needle component does not move in time on the other hand. |
