| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To bring about energy saving effects by surely adjusting refrigerating capacity. <P>SOLUTION: A hot gas system 6 is branched out of a compressor delivery system 51, refrigerant of a main pipe system 5 is cooled by a refrigerant heater of the system and returned to the same system 51, and then the refrigerant is returned to a compressor suction system 52 by a refrigerant circulation system 8 and circulated. The refrigerant is returned to the compressor suction side after merged with the refrigerant of the hot gas type 6, so that the refrigerant quantity necessary for the hot gas system 6 can be fed while preventing the liquid return and getting the sufficient quantity of the hot gas of the compressor delivery system. This constitution can reduce the refrigeration capacity by sufficient necessary in the hot gas system, prevent excessive cooling of a heater and reheating for compensating it, and operate an environment test device in an energy saved state. <P>COPYRIGHT: (C)2003,JPO</p> |
