| 摘要 |
A pressure control valve comprising a valve main body (10A) having a high-pressure refrigerant inlet port (11) and a low-pressure refrigerant outlet port (12); a valve seat-attached valved passageway (20) formed in the valve main body (10A) for decompressing and guiding the refrigerant from the high-pressure refrigerant inlet port (11) to the low-pressure refrigerant outlet port (12) and configured to enable a differential pressure regulating valve (15) to be fitted therein; and a throttling passageway (30) provided with an orifice (32) having a predetermined effective cross-sectional area for enabling the high-pressure refrigerant inlet port (11) to communicate, through short-cutting or detouring the valve seat (21), with a region of the valved passageway which is located downstream side of the valve seat (21), thereby enabling a magnitude of lift of the differential pressure regulating valve (15) from the valve seat (21) to be altered depending on a magnitude of difference in pressure between a high-pressure side and a low-pressure side.
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