Compressor

A compressor comprising:

• a casing configured to store a lubrication oil in a bottom portion thereof;
• a compression mechanism disposed in the casing, the compression mechanism being configured to compress a sucked fluid;
• an electric motor disposed above the compression mechanism, the electric motor being configured to drive the compression mechanism;
• a discharge pipe arranged to open into a space in the casing on an upper side of the electric motor;
• and
• an oil drainage mechanism configured to use a swirling flow generated by a rotation of the electric motor to guide a portion of the lubrication oil adhering to an inner wall of the casing to the discharge pipe,
• the oil drainage mechanism including an oil drain pipe having one end that is connected to the casing so as to open through the inner wall of the casing and another end that is connected to the discharge pipe, wherein the oil drain pipe is connected to the casing at a position above the compression mechanism.