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JPS57386A - Super-low frequency noise preventer - Google Patents

Super-low frequency noise preventer

Info

Publication number
JPS57386A
JPS57386A JP7459280A JP7459280A JPS57386A JP S57386 A JPS57386 A JP S57386A JP 7459280 A JP7459280 A JP 7459280A JP 7459280 A JP7459280 A JP 7459280A JP S57386 A JPS57386 A JP S57386A
Authority
JP
Japan
Prior art keywords
air
unload valve
low frequency
super
frequency noise
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
JP7459280A
Other languages
Japanese (ja)
Inventor
Katsuyoshi Kiyuuseki
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.)
JIYUKEN KOGYO KK
Original Assignee
JIYUKEN KOGYO KK
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 JIYUKEN KOGYO KK filed Critical JIYUKEN KOGYO KK
Priority to JP7459280A priority Critical patent/JPS57386A/en
Publication of JPS57386A publication Critical patent/JPS57386A/en
Pending legal-status Critical Current

Links

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  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: In an air compressor to be connected through an air tank to an air circuitry, to eliminate an unload valve by performing the speed control of an air compressor drive source thus to eliminate the super low frequency noise when opening the unload valve.
CONSTITUTION: Upon starting of motor M, the pressure P in the tank will increase and when it reaches to predetermined level a deceleration signal is produced from a deceleration level detector 4. The deceleration signal will decelerate the motor M to bring the inner pressure to predetermined level thereby the unload valve isn't opened. When supplying the pressure air into an air circuitry 3 the inner pressure will vary, but the motor M will continue the rotation with the speed corresponding with the consumption of the pressure air thus to maintain the inner pressure approximately constant. Consequently the unload valve for the compressor is eliminated and the super-low frequency noise caused by the opening of the unload valve is blocked.
COPYRIGHT: (C)1982,JPO&Japio
JP7459280A 1980-06-03 1980-06-03 Super-low frequency noise preventer Pending JPS57386A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7459280A JPS57386A (en) 1980-06-03 1980-06-03 Super-low frequency noise preventer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7459280A JPS57386A (en) 1980-06-03 1980-06-03 Super-low frequency noise preventer

Publications (1)

Publication Number Publication Date
JPS57386A true JPS57386A (en) 1982-01-05

Family

ID=13551577

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7459280A Pending JPS57386A (en) 1980-06-03 1980-06-03 Super-low frequency noise preventer

Country Status (1)

Country Link
JP (1) JPS57386A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62191683A (en) * 1986-02-18 1987-08-22 Mikuni Jukogyo Kk Reciprocative gas compressor
JPS646381U (en) * 1987-06-30 1989-01-13
US6720070B2 (en) 2000-04-28 2004-04-13 Toyo Boseki Kabushiki Kaisha Hydrophilic polyester fiber and hydrophilic nonwoven fabric using the same and their production

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4941909A (en) * 1972-05-16 1974-04-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4941909A (en) * 1972-05-16 1974-04-19

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62191683A (en) * 1986-02-18 1987-08-22 Mikuni Jukogyo Kk Reciprocative gas compressor
JPS646381U (en) * 1987-06-30 1989-01-13
US6720070B2 (en) 2000-04-28 2004-04-13 Toyo Boseki Kabushiki Kaisha Hydrophilic polyester fiber and hydrophilic nonwoven fabric using the same and their production

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