| 摘要 |
PROBLEM TO BE SOLVED: To complete defrosting in a short time while protecting a compressor during defrosting operation, relating to a refrigerating cycle device in which the defrosting operation of an evaporator is performed by increasing an opening degree of a variable aperture mechanism.SOLUTION: During defrosting operation, an overheating degree estimating means (S65) estimates an overheating degree of a sucked-in coolant of a compressor 14 based on compressor-discharged coolant pressure Pd and a compressor-discharged coolant temperature Td. In order that the estimated value comes within a predetermined reference dry range, a variable aperture control means 21a changes an open degree of an ejector 17 which is a variable aperture mechanism. By this, the problem of liquid compression with the compressor 14 can be avoided, and defrosting can be completed in a short time since the overheating degree of the sucked-in coolant of the compressor 14 does not rise unnecessarily. |
