| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration unit capable of appropriately controlling the degree of opening of an expansion valve at start-up of a compressor and reducing start-up load.SOLUTION: In a refrigeration unit R, a refrigerant circuit 1 is constituted by a compressor 11, a gas cooler 28, an expansion valve 32, an evaporator 33, and a high pressure side represents supercritical pressure. The refrigeration unit R includes a control unit for controlling the compressor 11 and the expansion valve 32. The control unit changes a degree of opening of the expansion valve 32 at start-up of the compressor 11 on the basis of outdoor air temperature. The control unit increases the opening of the expansion valve 32 when the outdoor air temperature is high and decreases the opening of the expansion valve 32 when the outdoor air temperature is low. |
