| 摘要 |
PROBLEM TO BE SOLVED: To provide an efficient and inexpensive control method of a CO<SB>2</SB>refrigeration device. SOLUTION: The following four functions (a)-(d) are provided in combination or independently, namely: (a) degree of supercooling of main flows in supercoolers; (b) degree of desired overheating in feelers that are portions of controllable throttle valves (34, 35, 36) disposed at supercooler outlets of split flows; (c) change in intermediate pressure in a secondary flowing route by regulated release or closure of pressure control valves (42, 43, 44) disposed downstream of each of the supercoolers in pipelines for guiding the split flows; and (d) change in compression final pressure on an upper stage. COPYRIGHT: (C)2009,JPO&INPIT
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