| 摘要 |
PROBLEM TO BE SOLVED: To prevent drift of coolant between each heat exchanger in a refrigeration system providing refrigerating cycles using a heat source side heat exchanger as a condenser, and using at least another heat exchanger as a condenser. SOLUTION: During coexistent operation of the refrigerating cycles using the outdoor heat exchanger 22 as a condenser, and using at least one of plural indoor heat exchangers 31, 41, 51 as a condenser, a pressure differenceΔP1 between a high pressure coolant and a coolant of a liquid tube 15 is detected, and an opening of an outdoor expansion valve 23 is adjusted such that the pressure differenceΔP1 becomes larger than a predetermined desired value. COPYRIGHT: (C)2008,JPO&INPIT |
