JPS56159590A - Discharge pressure and flow rate adjusting apparatus for screw compressor - Google Patents

Discharge pressure and flow rate adjusting apparatus for screw compressor

Info

Publication number
JPS56159590A
JPS56159590A JP6281080A JP6281080A JPS56159590A JP S56159590 A JPS56159590 A JP S56159590A JP 6281080 A JP6281080 A JP 6281080A JP 6281080 A JP6281080 A JP 6281080A JP S56159590 A JPS56159590 A JP S56159590A
Authority
JP
Japan
Prior art keywords
valve
mode
flow rate
suction
signal
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.)
Pending
Application number
JP6281080A
Other languages
Japanese (ja)
Inventor
Yozo Hibino
Hajime Arai
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 JP6281080A priority Critical patent/JPS56159590A/en
Publication of JPS56159590A publication Critical patent/JPS56159590A/en
Pending legal-status Critical Current

Links

Landscapes

  • Rotary-Type Compressors (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

PURPOSE: To simplify the structure of the apparatus and to improve the reliability thereof by a method wherein a suction adjusting valve of the screw compressor is controlled by switching from a suction choking mode to an ON-OFF mode or vise versa in proportion to the quantity of air used.
CONSTITUTION: When an adjuster 11 judges from a signal from a detector 10 that the air ratio is of the lower flow rate side with respect to a switching point R1, it gives a command signal to a servo valve 8 so that the suction adjusting valve 2 is opened or closed to the full in response to a signal from a pressure detector 6 to thereby control the valve 2 in an ON-OFF mode. On the contrary, when the adjuster 11 judges that the air ratio is of the higher flow rate side with respect to the switching point R1, it controls the servo valve 8 so that the sucking port of the valve 2 is choked in response to a signal from the pressure detector 6 while the opening degree of the sucking port is fed back by a position detector 9 to thereby control the valve 2 in a suction choking mode. Thus, the flow rate of the air and the discharge pressure of the compressor can be adjusted by controlling the suction adjusting valve 2 through both the suction choking mode and the ON-OFF mode in proportion to the quantity of air used.
COPYRIGHT: (C)1981,JPO&Japio
JP6281080A 1980-05-14 1980-05-14 Discharge pressure and flow rate adjusting apparatus for screw compressor Pending JPS56159590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6281080A JPS56159590A (en) 1980-05-14 1980-05-14 Discharge pressure and flow rate adjusting apparatus for screw compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6281080A JPS56159590A (en) 1980-05-14 1980-05-14 Discharge pressure and flow rate adjusting apparatus for screw compressor

Publications (1)

Publication Number Publication Date
JPS56159590A true JPS56159590A (en) 1981-12-08

Family

ID=13211060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6281080A Pending JPS56159590A (en) 1980-05-14 1980-05-14 Discharge pressure and flow rate adjusting apparatus for screw compressor

Country Status (1)

Country Link
JP (1) JPS56159590A (en)

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