| abstract |
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: power demand controlling means (11) for detecting and monitoring constantly an electric current flowing through the domestic lines; and power save controlling means (9), connected to the domestic power lines (5) and the output variable apparatus (7), for sending a power save signal to the apparatus (7), based on the current monitored by the power demand controlling means (11), so that an output of the apparatus (7) is reduced to a minimum value (e₀) and after the power save signal is cancelled the output is returned gradually and stepwise to an original value (e n ). |