| 摘要 |
A system and a method for saving power of an output variable apparatus such as an inverter air conditioner. A power demand controlling system includes: a power demand controlling unit for detecting and monitoring constantly an electric current flowing through the domestic lines; and power save controlling unit, connected to the domestic power lines and the output variable apparatus, for sending a power save signal to the apparatus, based on the current monitored by the power demand controlling unit, so that an output of the apparatus is reduced to a minimum value and after the power save signal is cancelled the output is returned gradually and stepwise to an original value.
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