| 摘要 |
PROBLEM TO BE SOLVED: To obtain an inverter controlling device which makes possible the control of preventing a power supply side breaker from operating without providing a current detecting circuit at the input side of an air conditioner. SOLUTION: An inverter controlling device 12 calculates five factors; the target frequency of an inverter from a set temperature and ambient temperature, the output power of the inverter part 4 based on a set voltage command value and an AC current detected by an AC current detecting circuit 9, a power supply voltage based on the output power and a DC voltage detected by a DC voltage detecting circuit 8, power to be consumed by each fan motor 6, 7 of an indoor unit and an outdoor unit corresponding to set air volume and finally an input current from the output voltage, the power consumption of each fan motor 6, 7 and the power supply voltage. When the input current reaches the limiting current value of the power supply side breaker, it controls the inverter part 4 by decreasing the target frequency of the inverter for a specified period of time. |
