| 摘要 |
PROBLEM TO BE SOLVED: To suppress stress and noise of a compressor by opening a valve for a short time to bring about pressure equilibrium while setting the time interval after stopping the compressor before delivering a start command within a set start waiting time before starting the compressor. SOLUTION: A freely opening/closing valve 6 is disposed at a position for bypassing the high pressure side of refrigeration cycle 5 to the low pressure side and a start waiting time setting means 12 sets a start waiting time required for starting a compressor 1 again without causing any lock after stopping thereof. A comparing means compares the start waiting time with a time interval immediately after stopping of the compressor before delivery of a stop command received from a timer count means 13. When the time interval is within the start waiting set time, the valve 6 is opened for a short time to bring about pressure equilibrium before starting the compressor 1. |
