| 摘要 |
An air conditioner is provided with a refrigerant circuit and an operation controller. The refrigerant circuit includes a heat source unit, a refrigerant communication pipe, an expansion mechanism, and a utilization unit. The heat source unit has a compression mechanism and a heat source side heat exchanger. The heat source unit is connected to the refrigerant communication pipe. The utilization unit has a utilization side heat exchanger and is connected to the refrigerant gas communication pipe. The operation controller performs an oil-return operation in advance for returning oil pooled in the refrigerant circuit when a refrigerant quantity judging operation is carried out for judging the refrigerant quantity inside the refrigerant circuit.
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