| 摘要 |
PURPOSE: To prevent the radiation of noise which is caused by the reverse rotation of a rotor of a compressor on the occasion when the compressor is stopped. CONSTITUTION: On the occasion when a compressor 1 is stopped, an output is delivered from a speed reducing means 41 of a control device 40 to an inverter 31 through an output means 44 so as to reduce the rotation speed of the compressor 1 and thereby to lower the compression ratio thereof. After a set time of a timer 43 passes and the compression ratio of the compressor 1 becomes a prescribed compression ratio or below, an operation stop means 42 delivers an output to the inverter 31 so as to stop the compressor 1. |
