Compressor and turbo chiller

A compressor comprising:

• a rotary shaft which rotates around an axis line;
• a plurality of impellers mounted on the rotary shaft;
• a main flow path which guides a fluid from the impeller of a preceding stage to the impeller of a subsequent stage;
• a chamber which has a ring shape comprising a first semi-circumferential side and a second semi-circumferential side, is centered on the axis line, and is in fluid communication with the main flow path;
• a suction nozzle which introduces the fluid into the chamber toward an inner periphery side from an outer periphery side;
• a plurality of movable vanes which are provided in the main flow path at intervals in a circumferential direction with respect to the axis line and are movable, thereby adjusting a flow rate of the fluid flowing through the main flow path;
• and
• a drive mechanism which changes angles of the plurality of movable vanes,
• wherein the drive mechanism is provided in the first semi-circumferential side of the chamber with respect to the suction nozzle, and the suction nozzle is inclined toward the second semi-circumferential side of the chamber such that the flow rate of the fluid to the second semi-circumferential side increases.