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AssigneeMitsubishi Heavy Industries, Ltd.
InventorsTsukasa Kasagi, Seiji Hiramatsu, Tetsuo Tsuji
Estimating the term…
In an air conditioner provided with an oil-return-operation control portion that performs an oil-return operation, when oil-return conditions are satisfied, by controlling the rotational speed of a compressor, the degree of opening of an expansion valve, etc., with a predetermined refrigerant cycle and provided with high-outdoor-air-temperature oil-return operation means for performing a forced oil-return operation via the oil-return-operation control portion when an outdoor temperature increases and a state in which a detection value of an outdoor air temperature sensor is higher than a set value continues for a predetermined period of time, the oil-return operation is prohibited for a certain period of time after performing the forced oil-return operation via the high-outdoor-air-temperature oil-return operation means.
An air conditioner which is provided with an oil-return-operation control portion that performs an oil-return operation, when oil-return conditions are satisfied, by controlling a compressor rotational speed and a degree of opening of an expansion valve with a predetermined refrigerant cycle, the air conditioner comprising:
Dependencies are inferred from the claim text.