Current control apparatus for air-conditioning system

A current control apparatus for an air-conditioning system in which a plurality of large capacity electric loads including at least two air-conditioners of the capability adjustable type are connected to a first power supply line, currents flowing in the air-conditioners being held down to individual current limit values, respectively, an overall or total current of a plurality of electric loads being held down to a value less than a predetermined overall or total current limit value,

• said current control apparatus comprising:
• a first controller adapted for comparing a detected value of said overall current with said overall current limit value to calculate, when the former is smaller than the latter, a distribution value for distributing, to an air-conditioner being operated, a current margin taken as a difference between the detected value of said overall current and said overall current limit value;
• and
• second controllers provided for every respective air-conditioners, and adapted to control a current flowing in a corresponding air-conditioner so that it is not above individual current limit value, and to carry out incremental correction of the individual current limit value in accordance with a distribution value calculated by said first controller.