| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration cycle device that can execute oil return without deteriorating air-conditioning feeling of an occupant in a cabin due to fluctuation of an air blowout temperature.SOLUTION: A refrigeration cycle device includes: a compressor 3 for compressing a refrigerant; pressure reducing valves 7, 9 for reducing the pressure of the compressed refrigerant; and a first evaporator 1 and a second evaporator 2 for evaporating the decompressed refrigerant. The refrigeration cycle device further includes outlet piping 11 on the evaporator outlet side for returning the refrigerant that has passed through the second evaporator 2 to the suction side of the compressor 3. The refrigeration cycle device further includes: injection piping 21 for guiding the refrigerant before decompressed by the pressure reducing valves 7, 9 to the outlet piping 11; and an injection control valve 60 comprising a three-way solenoid valve 6 for controlling a flow of the refrigerant to the injection piping 21. The refrigeration cycle device executes oil return control for making oil retained in the outlet piping 11 to the suction side of the compressor 3 by using the refrigerant injected from the injection piping 21 to an injecting portion 13 of the outlet piping 11.SELECTED DRAWING: Figure 1 |
