Compressor

A compressor comprising:

• a casing with an oil retention space being formed at a bottom of the casing;
• an electric motor accommodated in the casing;
• a driveshaft extending vertically and connected to the electric motor;
• a compression mechanism, accommodated in the casing, and having
• a movable part connected to the driveshaft to be driven by the electric motor, and
• an upper housing forming a crank chamber internally accommodating a connecting portion that connects an eccentric part of the driveshaft and the movable part, and the upper housing having an upper bearing that pivotally supports the driveshaft below the crank chamber;
• an oil supply passage leading oil in the oil retention space to the crank chamber, the oil supply passage being formed in the driveshaft;
• an oil discharge passage including
• a main oil discharge passage that extends in an axial direction in the driveshaft, and
• a first inflow passage communicating between the main oil discharge passage and the crank chamber;
• an oil supply pump configured to supply oil in the oil retention space to the oil supply passage;
• and
• an oil discharge pump configured to discharge oil in the crank chamber to the oil retention space via the oil discharge passage,
• an oil-recovery space being formed in a lower part of the upper housing below the crank chamber,
• the oil discharge passage further including a second inflow passage communicating between the main oil discharge passage and the oil-recovery space,
• an area of an inflow passage inlet of the first inflow passage is larger than an area of an inflow passage outlet of the first inflow passage, the inflow passage inlet opening into the crank chamber, and the inflow passage outlet opening into the main oil discharge passage, and
• the inflow passage inlet being disposed more forward in a rotation direction of the driveshaft than the inflow passage outlet.