JPS5719199A - Method for controlling capacity of screw compressor - Google Patents

Method for controlling capacity of screw compressor

Info

Publication number
JPS5719199A
JPS5719199A JP9391880A JP9391880A JPS5719199A JP S5719199 A JPS5719199 A JP S5719199A JP 9391880 A JP9391880 A JP 9391880A JP 9391880 A JP9391880 A JP 9391880A JP S5719199 A JPS5719199 A JP S5719199A
Authority
JP
Japan
Prior art keywords
control
controls
electric power
power consumption
set value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP9391880A
Other languages
Japanese (ja)
Other versions
JPH0134316B2 (en
Inventor
Takashi Yoshida
Fumio Takeda
Hiroyuki Matsuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9391880A priority Critical patent/JPS5719199A/en
Publication of JPS5719199A publication Critical patent/JPS5719199A/en
Publication of JPH0134316B2 publication Critical patent/JPH0134316B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Applications Or Details Of Rotary Compressors (AREA)
  • Control Of Presses (AREA)

Abstract

PURPOSE: To determine a change-over point for the purpose of titled control at an optimum point by temporally setting the change-over point of suction throttling type and on-off type controls, executing both controls, and determining a set value by the coincidence of the state quantity measured value of both controls.
CONSTITUTION: Operation is started from a suction throttling type control. The electric power consumption of a motor 3 is taken into a control device 23 via a detector 25, and its mean value M1 is stored. When the electric power consumption of the motor 3 goes equal to or lower than the temporally set value M, the control is shifted to an on-off type control. Namely, when the pressure in a gas cooler 10 arrives at an upper or lower limit, an air release valve 9 is opened or closed, to operate a compressor 1 under no load or full load, then the mean driving power M2 thereof is determined. The electric power consumption of the time when the driving power consumptions M1 and M2 of both controls coincide is stored as the set value M3 of the change-over point. In the subsequent control, the suction throttling control is carried out when the electric power consumption is equal to or larger than the set value M3 and if it is below the same, the on-off control is carried out.
COPYRIGHT: (C)1982,JPO&Japio
JP9391880A 1980-07-11 1980-07-11 Method for controlling capacity of screw compressor Granted JPS5719199A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9391880A JPS5719199A (en) 1980-07-11 1980-07-11 Method for controlling capacity of screw compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9391880A JPS5719199A (en) 1980-07-11 1980-07-11 Method for controlling capacity of screw compressor

Publications (2)

Publication Number Publication Date
JPS5719199A true JPS5719199A (en) 1982-02-01
JPH0134316B2 JPH0134316B2 (en) 1989-07-18

Family

ID=14095838

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9391880A Granted JPS5719199A (en) 1980-07-11 1980-07-11 Method for controlling capacity of screw compressor

Country Status (1)

Country Link
JP (1) JPS5719199A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138396A (en) * 1989-02-08 1992-08-11 Kabushiki Kaisha Toshiba Device for preventing paper from falling in a transfer device for electrophotographic recorders
JP2005145308A (en) * 2003-11-17 2005-06-09 Kiyotaka Hyodo Outboard motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4119016B2 (en) * 1998-09-29 2008-07-16 株式会社日立産機システム LOAD MEASUREMENT DIAGNOSIS DEVICE FOR AIR COMPRESSOR AND AIR COMPRESSOR HAVING THE SAME

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138396A (en) * 1989-02-08 1992-08-11 Kabushiki Kaisha Toshiba Device for preventing paper from falling in a transfer device for electrophotographic recorders
JP2005145308A (en) * 2003-11-17 2005-06-09 Kiyotaka Hyodo Outboard motor

Also Published As

Publication number Publication date
JPH0134316B2 (en) 1989-07-18

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