| 摘要 |
PROBLEM TO BE SOLVED: To provide a COrefrigeration freezer in which pressure of each part in a refrigerant circuit of a freezer does not exceed a set pressure even when a safety valve is not mounted.SOLUTION: A freezer is provided with a freezing cycle to which a compressor 11, a gas cooler 14, an expansion mechanism and a steamer 41 are connected via a closed-loop piping and which is charged with COrefrigerant, a sensor which detects the pressure of the COrefrigerant in the closed loop piping when the freezing cycle is stopped, and an alarm part 150 outputting abnormal alarm when the pressure detected by the sensor exceeds a set pressure.SELECTED DRAWING: Figure 1 |
