JPS5698593A - Controlling method of capacity of screw compressor - Google Patents

Controlling method of capacity of screw compressor

Info

Publication number
JPS5698593A
JPS5698593A JP14280A JP14280A JPS5698593A JP S5698593 A JPS5698593 A JP S5698593A JP 14280 A JP14280 A JP 14280A JP 14280 A JP14280 A JP 14280A JP S5698593 A JPS5698593 A JP S5698593A
Authority
JP
Japan
Prior art keywords
pressure
valve
cooler
throttle
microcomputer
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
JP14280A
Other languages
Japanese (ja)
Other versions
JPH0133676B2 (en
Inventor
Fumio Takeda
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 JP14280A priority Critical patent/JPS5698593A/en
Publication of JPS5698593A publication Critical patent/JPS5698593A/en
Publication of JPH0133676B2 publication Critical patent/JPH0133676B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

PURPOSE: To most suitably control the capacity according to an amount of air used by a method wherein a suction throttle system and an ON-OFF system are compared with each other and selected by using a microcomputer.
CONSTITUTION: If the suction throttle system is selected by the microcomputer 35, an electromagnetic valve 29 is opened by means of the microcomputer 35. If a decrease of the amount of the air used causes a pressure of a cooler 23 to be increased, a secondary pressure of a pressure adjusting valve 30 acts on a throttle valve 25 to throttle the amount of the suction air of a compressor. If the ON-OFF system is selected, the microcomputer 35 closes the electromagnetic valve 29. When a pressure of the cooler 23 reaches the upper limit, a pressure switch 34 turns a three- way electromagnetic valve 27 off, the pressure of the cooler 23 effects opening the throttle valve 25 to its full width through a pressure reducing valve 28 and a circuit 26b, and at the same time an air release valve 33 is opened to discharge a pressure of a separator 22 and to permit an unload operation to be performed. When the pressure of the cooler 23 reaches the lower limit, the 3-way electromagnetic valve 27 is turned ON, the pressure of the cooler 23 effects opening the throttle valve 25 to its full width through the pressure reducing valve 28 and a circuit 26a and at the same time, the air release valve is closed to make a full-load operation be performed.
COPYRIGHT: (C)1981,JPO&Japio
JP14280A 1980-01-07 1980-01-07 Controlling method of capacity of screw compressor Granted JPS5698593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14280A JPS5698593A (en) 1980-01-07 1980-01-07 Controlling method of capacity of screw compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14280A JPS5698593A (en) 1980-01-07 1980-01-07 Controlling method of capacity of screw compressor

Publications (2)

Publication Number Publication Date
JPS5698593A true JPS5698593A (en) 1981-08-08
JPH0133676B2 JPH0133676B2 (en) 1989-07-14

Family

ID=11465767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14280A Granted JPS5698593A (en) 1980-01-07 1980-01-07 Controlling method of capacity of screw compressor

Country Status (1)

Country Link
JP (1) JPS5698593A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52136406A (en) * 1976-05-11 1977-11-15 Gardner Denver Co Controllers for screw compressors

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52136406A (en) * 1976-05-11 1977-11-15 Gardner Denver Co Controllers for screw compressors

Also Published As

Publication number Publication date
JPH0133676B2 (en) 1989-07-14

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