Pressure reducer and refrigerating cycle unit using the same

摘要

A variable restrict valve (14) is disposed at the upstream side of a refrigerant flow, a fixed restrictor (15) is disposed at the downstream side of the variable restrict valve (14), an intermediate space (16) is provided between the variable restrict valve (14) and the fixed restrictor (15), a passage sectional area of the intermediate space (16) is set to be larger than the fixed restrictor (15) and passage length L of the intermediate space (16) is set to be larger than a predetermined length required when the flow of refrigerant injected from the variable restrict valve (14) expands more than the passage sectional area of the fixed restrictor (15).