| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration device capable of suppressing lowering of a discharge temperature of a compressor, even in the case where a hot gas defrosting operation is repeatedly performed in a relatively short time.SOLUTION: A refrigeration device 1 includes: a main refrigerant circuit 2; a bypass flow passage 28, an opening/closing mechanism 27; a correction value derivation unit 29b; and a control unit 29. The main refrigerant circuit at least has: a compression mechanism 12; an outdoor side heat exchanger 14; an expansion mechanism 15; and an indoor side heat exchanger 32. In this main refrigerant circuit, a refrigerant is filled inside. The bypass flow passage connects a discharge side of the compression mechanism and a liquid side of the outdoor side heat exchanger. The opening/closing mechanism opens/closes the bypass flow passage. The correction value derivation unit derives a correction value of a control value with respect to the expansion mechanism, on the basis of time in which the opening/closing mechanism is brought into an open state. The control unit controls the expansion mechanism by correcting the control value by the correction value.SELECTED DRAWING: Figure 1 |
