FLOW RATE CONTROL VALVE

摘要

PURPOSE: A flow rate control valve is provided to improve flow rate control performance by excluding a thermal expanding liquid or a diaphragm. CONSTITUTION: A lower housing(21) is formed in a specific shape. An upper housing(22) having an inlet(22a) and an outlet(22b) includes a specific space(23) charged with a liquid refrigerant. The upper housing is fixed on the upper face of the lower housing. A spool(24) combined to a guide hole(21a) of the lower housing moves up and down. A sealing unit prevents the leakage of a liquid refrigerant charged in the space of the upper housing. The spool is elastically supported on an elastic support unit combined to the lower portion of the spool. The spool is lifted up and down by a drive unit.