(19)
(11) EP 0 213 092 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.09.1987 Bulletin 1987/37

(43) Date of publication A2:
04.03.1987 Bulletin 1987/10

(21) Application number: 86850186

(22) Date of filing: 27.05.1986
(84) Designated Contracting States:
BE DE FR GB IT LU NL

(30) Priority: 28.06.1985 SE 8503213

(71) Applicant: Atlas Copco Aktiebolag
 ()

(72) Inventor:
  • van Nederkassel, Ludovicus Jacobus
     ()

   


(54) Method of controlling the pressure of a medium delivered by a compressor plant


(57) A method of controlling the pressure of medium delivered by a compressor plant. The pressure is measured at predetermined time intervals. Each pressure is compared with the next preceding pressure and anumber of compressors (C₁, C₂ ,... CX) being one less than is needed to change sign of the pressure derivative is switched in or out. One further compressor is switched in or out at the limit pressure.







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