Stirling refrigerator with nonlinear braking spring.

摘要

A Stirling refrigerator has a cold-finger 2 in which a displacer 7 can reciprocate in accordance with changes in pressure inside the cold-finger which are produced by a compressor 1. A nonlinear spring 16 is connected between the displacer and the cold-finger in order to brake the movement of the displacer at the ends of its stroke. The nonlinear spring has a greater spring constant when it is deformed by the displacer being near either end of its stroke than when the nonlinear spring is in a neutral position.