Refrigerant cycling apparatus.

摘要

A refrigerant cycling apparatus, enclosing a non-azeotropic mixture including a high-boiling point refrigerant and a low-boiling point refrigerant, includes: a first compressor (1,21); a second compressor (3,23); a fractionating/separating device (6,22), the discharge pipe (2) of the first compressor being connected with either the top portion or the middle portion of the fractionating/separating device (6,22), the suction pipe of the first compressor being connected with the top portion of the fractionating/separating device, the discharge pipe of the second compressor being connected with either the middle portion or the bottom portion of the fractionating/separating device (6,22), the suction pipe of the second compressor (3,23) being connected with the bottom portion of the fractionating/separating device (6,22); a first pressure reducing device (8,31); a first vaporizing device (9,27) before the first compressor (1,21); a second pressure reducing device (5,29); and a first condensing device (4,24) after the second compressor.