FREE DISPLACER TYPE STIRLING REFRIGERATOR

摘要

PURPOSE:To prolong the life of a refrigerator in a simple structure by improving the structure of springs elastically supporting a piston or displacer. CONSTITUTION:A piston spring 15 is constituted of a disk 16 composed of an elastic body, and at the disk 16 the center part of a secondary attaching part 19 is connected to a piston 5 and each pointed end of a primary attaching part 18 is fixed on a connecting rod 14 of a spring support member 12. When the piston 5 is reciprocated in a cylinder 3 by the drive of a linear motor 6, each of the parts 18 and a secondary attaching part 19 are relatively displaced in the center line direction of the disk 6 in slipping off each other at a secondary slit 17b and parts 18 and parts 19 elastically support the piston 5 so that it can be reciprocated. At that time, though each of the parts 18 and the parts 19 are relatively displaced, the circle formed by respective pointed ends of the parts 18 can be kept in coaxial location all the time for the center of the disk 16.