To more efficiently perform a refrigerating cycle operation while properly returning refrigerating machine oil to a compressor.
This air conditioner includes a first oil return circuit 55 having a solenoid valve 53 and a first capillary tube 54, and a second oil return circuit 57 having a second capillary tube 56 connected to an oil return pipe 52 in parallel, and a control section 91 closes the solenoid valve 53 of the first oil return circuit 55 (S7), when a driving frequency of the compressor 40 detected by a frequency sensor 78 is a predetermined rotational frequency or less, and temperature load calculated by a temperature load calculating section 92 is a predetermined value or less (YES in S4). Further the control section 91 opens the solenoid valve 53 of the first oil return circuit 55, when the rotational frequency of the compressor 40 is the predetermined rotational frequency or more, or the temperature load is the predetermined value or more (NO in S4).
SAITO TADASHI
Masataka Otani
Tanaka rice