| 摘要 |
PROBLEM TO BE SOLVED: To supply a refrigerator accumulating in non-operating outdoor units to an outdoor unit being operated in which a shortage of refrigerant occurs, without starting compressors of the non-operating outdoor units. SOLUTION: In the control method for the refrigeration apparatus, in which to refrigerant piping 10 installed between the indoor side and the outdoor side, a plurality of outdoor units 30A, 30B respectively including a compressor 31, a flow channel switch valve 34, an outdoor heat exchanger 35, an outdoor expansion valve 36, and an accumulator 37 are connected in parallel on the outdoor side, and each of the outdoor units is provided with a hot gas bypass circuit including a solenoid opening/closing valve 38a and an expansion mechanism 38b arranged in series, and connected between high-pressure side piping 33a on the discharge side of the compressor, and low-pressure side piping 33b on the accumulator side. When shortage of refrigerant occurs when a cooling operation is performed in a state that only the outdoor unit 30A is operated and other outdoor units 30B are not operated, the solenoid opening/closing valves 38a of the non-operating outdoor units 30B are opened so that the refrigerant accumulating in the non-operating outdoor units 30B is supplied to the outdoor unit 30A via the hot gas bypass circuit 38 and the low-pressure piping 33b. COPYRIGHT: (C)2010,JPO&INPIT |
