Title:
SCREW COMPRESSOR DISCHARGE PRESSURE CONTROL METHOD
Document Type and Number:
Japanese Patent JP3429999
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a screw compressor discharge pressure control method to restrict energy loss to the minimum, prevent generation of hunting, and achieve excellent responsiveness.
SOLUTION: In a discharge pressure control method for a screw compressor provided with a slide valve 2 for regulating the capacity, and a bypass passage 6 to communicate a discharge passage with a suction passage 5 through an opening-adjustable bypass valve 4, the slide valve 2 is moved toward a no load condition when discharge gas consumption is decreasing, and toward a full load condition when discharge gas consumption is increasing controlled, based on a calculated target value of slide valve position, by the gain curve of a large gradient when an absolute value of deviation between a bypass valve opening and a reference opening is larger than a specified value, and by the gain curve of a small gradient when the absolute value is smaller than the specified value.
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Inventors:
Yuji Oishi
Koji Kuroeda
Koji Kuroeda
Application Number:
JP769398A
Publication Date:
July 28, 2003
Filing Date:
January 19, 1998
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
F04C18/16; F04C28/00; F04C28/06; F04C28/12; F04C28/26; F04C29/00; (IPC1-7): F04C29/10; F04C18/16
Domestic Patent References:
| JP2294592A | ||||
| JP6278497A | ||||
| JP33078B2 |
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)
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