| 摘要 |
The present invention provides a refrigerating cycle apparatus that enables energy saving by using a refrigerant for which a high-pressure side can be operated in a gas-liquid two-phase region or a supercritical region to perform operation in which a high COP is maintained even in response to fluctuations in thermal load and temperature conditions, etc., and provides an operation control method thereof. In a refrigerating cycle apparatus of the present invention, a controlling means (19) sets a high-pressure pressure target value from thermal load and temperature conditions that are based on refrigerant information that has been obtained from detectors (11 through 18), and controls at least one of a rotational frequency of a compressor (1), a degree of opening of an electronic expansion valve (4), a rotational frequency of an outdoor fan (3), or a rotational frequency of an indoor fan (7) so as to match a high-pressure pressure to the high-pressure pressure target value that has been set, Here, a threshold value is set when the high-pressure pressure target value is set, and a method for setting the high-pressure pressure target value is modified depending on whether the high-pressure pressure is greater than or equal to the threshold value or less than the threshold value when the high-pressure pressure target value is decided. |
