| 摘要 |
PROBLEM TO BE SOLVED: To prevent the non-continuation of refrigerant filling operation caused by a fact that an expansion valve is brought into a closed state in a refrigeration device equipped with a refrigerant circuit provided with an opening-variable expansion valve. SOLUTION: The refrigerant device is composed so that a valve control means 53 for controlling an opening of the expansion valve 18 carries out the determination operation for determining whether or not the expansion valve 18 is in a closed state on the basis of the state of a low pressure side refrigerant between the expansion valve 18 and a compressor 30 in a state that an opening command value is equal to a lower limit command value during the refrigerant filling operation of filling a refrigerant in the refrigerant circuit 20 while carrying out a refrigerating cycle so that a user side heat exchanger 37 in the refrigerant circuit 20 is operated as an evaporator. The valve control means 53 is composed to correct the lower limit command value to a larger value when it is determined that the expansion valve 18 is in the closed state in the determination operation. COPYRIGHT: (C)2009,JPO&INPIT
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