FLOW CONTROL VALVE

摘要

A flow control valve comprises a valve seat (1) having a valve port (121) in its valve chamber and a valve rod (2) opening or closing the valve port (121). A sleeve protrusion part (122) projects upward from the valve port (121) in an axial direction thereof. The valve rod (2) is tubular and is cylindrical at the lower end. An open slot (3) matching with a flow curve is provided in the circumferential side wall of one of the sleeve protrusion part (122) and the lower end of the valve rod (2). One of the sleeve protrusion part (122) and the lower end of valve rod (2) is inserted into or extracted from the other to disconnect or connect the open slot (3) with the valve port (121). The structural design of the flow control valve can balance the refrigerant pressure on the valve rod (2) in the axial direction while ensuring that the required flow curve can be obtained.