| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump cycle device of high efficiency of heating operation by minimizing frequency of a defrosting operation in the heating operation. <P>SOLUTION: As an allowable maximum rotational frequency of a compressor 1 is controlled to be changed according to detected condensation pressure, or detected water temperature and outside air temperature, the operation of the compressor 1 can be properly controlled according to an operating state of the heat pump cycle device 100, and the operation of the heat pump cycle device 100 can be efficiently controlled. In particular, under the outside air temperature at which the defrosting operation of an outdoor heat exchanger 5 is needed in the heating operation, as the allowable maximum rotational frequency of the compressor 1 is determined to suppress frost formation in the outdoor heat exchanger 5, and the compressor 1 is operated within the allowable maximum rotational frequency, the frequency of the defrosting operation is reduced, or a time of the defrosting operation is shortened, and further as the heating operation is performed for a long time in a state that the rotational frequency of the compressor 1 is increased as much as possible, the operation of the heat pump cycle device 100 can be more efficiently controlled. <P>COPYRIGHT: (C)2012,JPO&INPIT |
