| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerating apparatus having a function of determining shortage of a refrigerant in a refrigerant circuit almost accurately.SOLUTION: A refrigerating apparatus R includes: a two-stage compressor 11; an intercooler 20 having an entrance connected to a refrigerant discharge part 16 in the first stage of the two-stage compressor 11 and having an exit connected to a refrigerant suction part 17 in the second stage of the two-stage compressor 11; a gas cooler 30 having an entrance connected to a refrigerant discharge part 18 in the second stage of the two-stage compressor 11; and an intermediate heat exchanger 40 which is connected to an exit of the gas cooler 30 and supercools a refrigerant flowing thereinto after passing through the gas cooler 30 with a refrigerant decompressed by an expansion valve 35 after passing through the gas cooler. The refrigerating device also includes: a first control unit C1 which controls a valve opening degree of the expansion valve 35 on the basis of a target value of a supercooling degree of the intermediate heat exchanger 40; and a second determining part 92, which determines shortage of the refrigerant if the supercooling degree does not approach the target value even after the valve opening degree of the expansion valve 35 is increased for a predetermined time by the first control unit C1. |
