| 摘要 |
PURPOSE: To reduce the noise level with a simple constitution by interposing a valve plate between a cylinder block having a rolling piston and a bearing of an eccentric shaft to support the rolling piston, and respectively forming a valve storage recessed part in the valve plate, and a recessed part as a silencer chamber in a bearing. CONSTITUTION: A cylinder block 4 with a rolling piston 5 fitted thereto is stored in a sealed housing 1 having a suction splicer 2 and a discharge splicer 3, and the rolling piston 5 is mounted on an eccentric shaft 7 to be driven by an electric motor comprising a rotor 8 and a stator 9. Bearings 6, 10 to support the eccentric shaft 7 are arranged on both sides of the cylinder block 4, and a valve plate 20 provided with a discharge port 21 to be opened/closed by a reed valve 30 is interposed between the cylinder block 4 and the bearing 10. Two arc-shaped recessed parts 11a, 11b to be communicated through a communication groove 12 are formed in the bearing 10, the discharge port 21 is opposite to one recessed part 11a while a gas outlet 11c is formed in the other recessed part 11b.
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