Compressor

A compressor comprising:

• a casing;
• a motor fixed to the casing;
• a drive shaft coupled to the motor, the drive shaft extending vertically;
• a compression mechanism driven by the drive shaft, the compression mechanism being configured to compress a fluid;
• and
• a shall-inside oil supply path provided in the drive shaft, the shaft-inside oil supply path being configured such that oil at a bottom of the casing is supplied through the shaft-inside oil supply path to a sliding portion of the drive shaft above the motor,
• the compressor including
• a shaft-inside oil discharge path provided in the drive shaft, the shaft-inside oil discharge path extending from an upper portion to a lower portion of the motor, and
• an oil discharge pump coupled to a lower end of the drive shaft, the oil discharge pump being arranged and configured to discharge the oil that has been supplied to the sliding portion of the drive shaft to the bottom of the casing through the shaft-inside oil discharge path.