Compressor

A compressor comprising:

• a rotating shaft that rotates around an axis;
• an impeller that rotates along with the rotating shaft to compress and discharge an intake working fluid;
• a casing that covers the rotating shaft and the impeller and comprises a diffuser for guiding the working fluid discharged from the impeller to an outside in a radial direction of the rotating shaft;
• a cooling fluid supplying unit that supplies the working fluid compressed by the impeller into the casing as a cooling fluid for cooling a cooling object part disposed in the casing;
• and
• a cooling fluid circulating unit that discharges the cooling fluid that has passed through the cooling object part to an outside of the casing, and supplies the discharged cooling fluid downstream of an outlet of the impeller and upstream of the diffuser,
• wherein the cooling fluid supplying unit comprises:
• a heat exchanger that cools at least a portion of the working fluid;
• and
• a supply pipe that supplies some of the working fluid after being cooled by the heat exchanger to an inside of the casing,
• wherein the casing has a plurality of nozzles that are connected to the diffuser and are disposed at intervals in a circumferential direction around the axis of the rotating shaft, and
• wherein the cooling fluid circulating unit supplies the cooling fluid discharged to the outside of the casing to the diffuser through the plurality of nozzles.