| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate useless power consumption due to inefficient start and stop of a refrigeration device disposed in a freezer, a freezing storage or the like and the load of a standby voltage when the refrigeration device does not perform freezing operation. <P>SOLUTION: A refrigerator 30 is arranged together with the freezing storage 20, and the freezing storage 20 and the refrigerator 30 are respectively provided with separate systems of NH<SB POS="POST">3</SB>/CO<SB POS="POST">2</SB>refrigeration devices 40 and 50. A CO<SB POS="POST">2</SB>liquefaction heat exchanger 34 is disposed in the refrigerator 30, and CO<SB POS="POST">2</SB>liquefaction paths 36, 38 branched from a return path 448 of a CO<SB POS="POST">2</SB>circulation circuit 444 are connected to the CO<SB POS="POST">2</SB>liquefaction heat exchanger 34. When the operation of the freezing storage 20 is stopped, CO<SB POS="POST">2</SB>brine gas gasified in the CO<SB POS="POST">2</SB>circulation circuit 444 and a CO<SB POS="POST">2</SB>liquid receiver 442 is sent to the CO<SB POS="POST">2</SB>liquefaction heat exchanger 34, is cooled and liquefied, and is returned to the CO<SB POS="POST">2</SB>circulation circuit 444 and, thereby the elevation of temperature and pressure of the CO<SB POS="POST">2</SB>liquid receiver 442 and the CO<SB POS="POST">2</SB>circulation circuit 444 is prevented. <P>COPYRIGHT: (C)2012,JPO&INPIT |
