Abstract: A stirling refrigerator may include a compressing portion compressing operating fluid filling a housing by reciprocal motion of a piston, an expanding portion expanding the operating fluid compressed at the compressing portion by reciprocal motion of a piston, and a regenerating portion fluidly communicating the compressing portion with the expanding portion, and may provide heat at the compressing portion and may absorb heat at the expanding portion through repeating isothermal compression, constant-volume process and isothermal expansion of the operating fluid. The rectification unit may be adapted to uniformalize flow of the operating fluid flowing between the compressing portion and the expanding portion.

Abstract: A Stirling refrigerator for a vehicle may include a drive portion receiving driving torque to be rotated, a compression portion that may be connected to the drive portion to isothermally compress operational fluid through rotation of a rotation shaft, an expansion portion that may be disposed at one side of the compression portion and isothermally expands the operational fluid that may be compressed by the compression portion through the rotation of the rotation shaft to perform an endothermic reaction, and a regeneration portion that may be disposed at one side of the expansion portion and connects the compression portion with the expansion portion such that the compressed operational fluid may be supplied to the expansion portion.