| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dual refrigerating cycle device including a dual refrigerating cycle, the dual refrigerating cycle device reducing a flash gas at an inlet of an expansion device in a high-temperature side refrigeration circuit. <P>SOLUTION: The high-temperature side refrigeration circuit Ra is composed of a high-temperature side compressor 1, a primary channel 2a of a high-temperature side condenser 2, a primary channel 3a of a subcooling heat exchanger 3, a high-temperature side expansion device 4, and a primary channel 5a of a cascade heat exchanger 5 which are connected in order by a refrigerant pipe P. The high-temperature side refrigeration circuit Ra also includes a bypass circuit 9 in which one end 9a is connected to the refrigerant pipe P between the primary channel 2a of the water heat exchanger 2 and the high-temperature side expansion device 4 and between the primary channel 2a of the water heat exchanger 2 and the subcooling heat exchanger 3, and the other end 9b is connected to a compression chamber of intermediate pressure in a compression process of the high-temperature side compressor 1. The bypass circuit 9 is equipped with an auxiliary expansion device 10 and a secondary channel 3b of the subcooling heat exchanger 3. <P>COPYRIGHT: (C)2013,JPO&INPIT |
