| 摘要 |
PROBLEM TO BE SOLVED: To prevent stagnation of a coolant in a utilization side heat exchanger becoming an idle state in a refrigeration system provided with a plurality of utilization side units. SOLUTION: In a coolant circuit 20, an air conditioning unit 12, a refrigeration showcase 13, and a freezing showcase 14 are connected in parallel with each other with respect to an outdoor unit 11. When carrying out thermo-off of an indoor heat exchanger 71 of the air conditioning unit 12, an opening control means 101 fully closes an indoor expansion valve 72. Then, in the opening control means 101, a coolant amount accumulated in the indoor heat exchanger 71 is detected, and an opening of the indoor expansion valve 72 is adjusted in response to the coolant amount. COPYRIGHT: (C)2008,JPO&INPIT |
