AIR CONDITIONER
PROBLEM TO BE SOLVED: To provide an air conditioner capable of preventing oil from accumulating in a refrigerant circuit, and capable of preventing a target space from being cooled extremely.SOLUTION: An air conditioner A includes: a plurality of refrigerant circuits 11, 21 in one refrigerant circui...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide an air conditioner capable of preventing oil from accumulating in a refrigerant circuit, and capable of preventing a target space from being cooled extremely.SOLUTION: An air conditioner A includes: a plurality of refrigerant circuits 11, 21 in one refrigerant circuit 11 of which a utilization heat exchanger 18 is used as an evaporator, and in the other refrigerant circuit 21 of which a utilization heat exchanger 28 is used as a condenser; and a control unit 50. The control unit executes such an operation for preventing oil accumulation that the rotational frequency of a compressor 12 corresponding to the utilization heat exchanger 18 on the evaporator side is made larger than a predetermined rotational frequency so as to prevent oil from accumulating in the refrigerant circuit 11 or recover oil in the refrigerant circuit 11.SELECTED DRAWING: Figure 1
【課題】冷媒回路での油溜まりを回避でき、且つ対象空間が極端に冷えてしまうことを防止できる空気調和機を提供する。【解決手段】空気調和機(A)には、複数の冷媒回路(11,21)のうちの一部の冷媒回路(11)の利用熱交換器(18)が蒸発器となり他の冷媒回路(21)の利用熱交換器(28)が凝縮器となると同時に、蒸発器側の利用熱交換器(18)に対応する圧縮機(12)の回転数を、一部の冷媒回路(11)に油が溜まらないように、又は一部の冷媒回路(11)の油を回収するように所定回転数より大きくする油溜まり回避運転を実行させる制御部(50)が設けられる。【選択図】図1 |
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