| 摘要 |
PURPOSE: A structure for attaching a balance of a stirling refrigerator is provided to prevent the reduction of anti-vibration function, which is caused by the dislocation of an attaching position by moving the balance mounted to a crank shaft of the stirling refrigerator. CONSTITUTION: A Stirling refrigerator(1) for preventing oil rising is composed of a housing(2), a cylinder(17), pistons(19,25), piston rods, and an oil seal bellows. The oil seal bellows seals a space between the housing and the cylinder, wherein a tip end of the oil seal bellows is sealed and fixed on the piston or on the piston rod inside the cylinder, and a base end of the oil seal bellows is installed on the housing. The oil seal bellows reciprocates with a stroke, wherein the tip end of the oil seal bellows is compressed to a compression side from a position of free length and then returns to the position of free length.
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