| 摘要 |
A refrigerant compressor includes a sealed case 9, a compression mechanism 2 and a motor part 16 contained in the sealed case, and an oil reservoir 53 formed in a lower portion of the sealed case. The refrigerant compressor further includes an oil supply pipe 62 which links the oil reservoir and a suction side of the compression mechanism by passage and introduces oil in the oil reservoir to the suction side, an oil supply amount adjusting means 61 which is provided on the oil supply pipe and adjusts an amount of oil supply supplied to the suction side, a rotational speed detecting means which detects a rotational speed of the motor part, and an oil supply amount controlling unit 80 which controls the oil supply amount adjusting means according to a rotational speed detected by the rotational speed detecting means. The oil supply amount controlling unit controls the oil supply amount adjusting means in a manner that an amount of oil supply supplied to the suction side from an oil supply pipe decreases as a rotational speed of the motor part increases. According to the present invention, a leakage of refrigerant in a compression chamber and a refrigerant-heating loss due to oil can be reduced under a range from a high-speed rotation to a very low rotational speed. |
