Unit cooler

A unit cooler comprising:

• a housing in which an intake port is formed;
• an air conditioning unit accommodated in the housing, forming a refrigerant cycle, configured to cool air drawn through the intake port, and configured to discharge the cooled air to an outside of the housing;
• and
• a duct disposed in the housing and through which the air cooled by the air conditioning unit is discharged, wherein
• the duct is a bellows device having one end portion and the other end portion, the bellows device allowing the cooled air to be drawn through the one end portion, to flow through an inside of the bellows device, and to be discharged from the other end portion, the bellows device being extendible and contractible so that a distance between the one end portion and the other end portion is changed,
• the one end portion is fixed to an inside of the housing, and
• at least a portion of the other end portion is retracted to the inside of the housing when the bellows device is most contracted.