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Current control apparatus for air-conditioning system

  • US 5,207,071 A
  • Filed: 04/24/1992
  • Issued: 05/04/1993
  • Est. Priority Date: 04/26/1991
  • Status: Expired due to Fees
First Claim
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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.

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