Centrifugal compressor

A centrifugal compressor that supplies air to a fuel cell, the centrifugal compressor comprising:

• an impeller including blades;
• and
• a housing accommodating the impeller, wherein
• the housing includes
• a suction port through which air is drawn in,
• an impeller chamber accommodating the impeller, and
• an introduction chamber that connects the suction port to the impeller chamber and introduces air to the impeller chamber,
• the housing includes an introduction chamber defining portion that defines the introduction chamber, and
• the introduction chamber defining portion includes an injection port through which water is sprayed to air flowing through the suction port toward the impeller chamber.