REGENERATIVE REFRIGERATOR, FIRST STAGE REGENERATOR, AND SECOND STAGE REGENERATOR

摘要

PROBLEM TO BE SOLVED: To improve the refrigerating capacity of a regenerative refrigerator.SOLUTION: A regenerative refrigerator comprises a regenerator part that precools working gas and an expander that cools the working gas by expanding the working gas precooled by the regenerator part. The regenerator part comprises a zinc-based regenerative material made of zinc or an alloy mainly containing zinc. A first stage regenerator 30 may comprise a high temperature part comprising a first regenerative material and a low temperature part comprising a second regenerative material different from the first regenerative material. A second stage regenerator 60 may comprise a high temperature part comprising the second regenerative material and a low temperature part comprising a third regenerative material different from the second regenerative material. The second regenerative material may comprise a zinc-based regenerative material made of zinc or an alloy mainly containing zinc.