Current control apparatus for air-conditioning system
First Claim
1. 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.
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Abstract
There is disclosed a current control apparatus comprising first controllers adapted for detecting an overall or total load current to calculate distribution values for distributing a current margin with respect to an overall or total current limit value to respective air-conditioners; and second controllers adapted for respectively controlling air-conditioners so as not to exceed individual current limit values, and for carrying out an incremental correction of individual current limit values in accordance with distribution values calculated by the first controllers.
31 Citations
9 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification