| 摘要 |
This refrigerant compressor is equipped with: an airtight case (9); a compressor mechanism (2) and an electric motor (16) accommodated within the airtight case; and an oil reservoir (53) formed on a lower part of the airtight case. The refrigerant compressor is further equipped with: an oil supply pipe (62) which communicates the oil reservoir with the intake side of the compressor mechanism, and which is used for guiding oil in the oil reservoir to said intake side; an oil supply amount adjusting means (61) which is arranged on the oil supply pipe, and which is used for adjusting the amount of oil to be supplied to said intake side; a rotational speed detecting means which detects the rotational speed of the electric motor; and an oil supply amount control unit (80) which controls the oil supply amount adjusting means on the basis of the rotational speed detected by the rotational speed detecting means. As the rotational speed of the electric motor increases, the oil supply amount control unit controls the oil supply amount adjusting means so that the amount of oil to be supplied from the oil supply pipe to said intake side is reduced. According to the present invention, from high rotational speeds to extremely low rotational speeds, refrigerant leakage in a compression chamber and refrigerant heating loss due to oil can be reduced. |
