US 9,285,038 B2 · Flow control valve

Abstract

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.

Claims20

Dependent claims

A flow adjusting valve comprising a valve seat and a valve rod, the valve seat being provided, in a valve cavity thereof, with a valve port, and the valve port being opened or closed by the valve rod;

wherein the valve port is provided with a sleeve protrusion portion projected upwards along an axial direction of the valve port, the valve rod has a tubular shape and a conduit extends through the valve rod in the axial direction, and a lower end portion of the valve rod is a cylinder;
a circumferential side wall of one of the sleeve protrusion portion and a lower end portion of the valve rod is provided with an opening groove configured to adjust a flow amount, and one of the sleeve protrusion portion and the lower end portion of valve rod is projected into or moved out of the other one so as to stop the communication between the opening groove and the valve port or to communicate the opening groove with the valve port.

Dependencies are inferred from the claim text.

Flow control valve

Life of this patent

Flow control valve

Life of this patent

Abstract

Claims20