Patent ID: 9092032
Filing Date: 2015-07-28
Classification: G05D,Y10T

Abstract:
1. A flow control valve, comprising: a valve body including a flow path; a first poppet fixed in the valve body, the first poppet including an inlet through which a fluid flows in, and an outflow hole through which the fluid flows out to the flow path; a second poppet fixed in the valve body, the second poppet including an outlet through which the fluid flows out, and an inflow hole through which the fluid flows in from the flow path; a sleeve and an actuator to adjust an area of the outflow hole by covering the outflow hole while sliding along an external surface of the first poppet; a spool formed to slide solely along an external surface of the second poppet, the spool being elastically supported by the second poppet; and bellows coupled with the first poppet and the spool, the bellows expanding and contracting based on a change in an internal or external pressure, wherein the spool adjusts an area of the inflow hole by covering the inflow hole while sliding when the bellows expands and contracts.