| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerating device for improving reliability by preventing operation failure due to the adhesion of sludge or the like. SOLUTION: This refrigerating device is provided with a refrigeration circuit where a compressor 1, an outdoor heat exchanger 3, an electric motor-operated expansion valve 4, and an indoor heat exchanger 5 are connected annularly. When accumulated operation time reaches a specific amount of time, the fluctuation (low frequency and maximum frequency) of the operating frequency of the compressor 1 is repeated for n1 times in a cycle opposite to a normal operation, thus allowing the pressure difference between the high- and low-voltage sides of the electric motor-operated expansion valve 4 to pulsate and remove sludge or the like adhering to the inside of the electric motor-operated expansion valve 4. |
