US20040247452A1 - Method of controlling a plurality of compressors - Google Patents

Method of controlling a plurality of compressors Download PDF

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Publication number
US20040247452A1
US20040247452A1 US10/844,012 US84401204A US2004247452A1 US 20040247452 A1 US20040247452 A1 US 20040247452A1 US 84401204 A US84401204 A US 84401204A US 2004247452 A1 US2004247452 A1 US 2004247452A1
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US
United States
Prior art keywords
compressors
pressure
compressor
operating
transmitted
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.)
Abandoned
Application number
US10/844,012
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English (en)
Inventor
Kazuaki Sato
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.)
Anest Iwata Corp
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Anest Iwata Corp
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 Anest Iwata Corp filed Critical Anest Iwata Corp
Publication of US20040247452A1 publication Critical patent/US20040247452A1/en
Assigned to ANEST IWATA CORPORATION reassignment ANEST IWATA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SATO, KAZUAKI
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
    • F04B41/06—Combinations of two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
    • F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

Definitions

  • the present invention relates to a method of controlling a plurality of compressors.
  • Japanese Patent No. 2,875,702 discloses a method of controlling a plurality of compressors in a system in which compressed gases from a plurality of compressors are gathered into a pressure tank of which a required compressed gas is taken out.
  • the upper limit of pressure is kept to 0.2 MPa higher than used pressure to increase difference between the upper and lower limits.
  • rotation speed of the compressor is set depending on high upper limit pressure and it is necessary to decrease rotation speed during normal operation. So it operates with decreased amount of air, thereby decreasing efficiency of the compressors.
  • the compressors are cooled with cooling fans driven at low rotation speed thereby decreasing cooling effect. Thus, it causes decrease in lives of tip seals and bearings.
  • FIG. 1 is a view which shows one embodiment of the present invention.
  • FIG. 2 is a graph which shows a change in pressure to compressors in FIG. 1.
  • FIG. 1 illustrates one embodiment of the present invention.
  • Compressed gases such as compressed air
  • compressed air outputted from a plurality of compressors are gathered into a pressure tank.
  • a required amount of compressed air is taken out of the pressure tank and employed.
  • the compressed gases are not always gathered into the pressure tank, but may be taken out of conduits directly.
  • check valves 4 comprising V 1 to V 8 are provided to prevent running back of compressed air from the compressors 1
  • Compressed air through the check valves 4 is all fed into a pressure tank 5 , of which compressed air used in an object 7 is taken out by opening and shutting a valve 6 .
  • the compressors 1 are controlled on the basis of feedback by determination of compressed air in the pressure tank 5 .
  • Pressure of compressed air in the pressure tank 5 is measured by a pressure sensor 8 to generate a pressure signal which is transmitted to a control 9 which has a determining portion 10 for determining the number of operating compressors and a selecting portion 11 for starting and stopping any of the compressors. Based on the pressure signal measured by the pressure sensor 8 , the determining portion 10 determines the number of the operating compressors 1 . Generally, the operating compressors are determined depending on the pressure signal between predetermined upper and lower limits.
  • each of the compressors 1 has approximately the same capability, and the pressure between the upper and lower limits are divided into pressure levels which are equal to the compressors 1 in number.
  • the measured pressure signal is out of desired pressure level and reaches to the boundary of the pressure levels, thereby changing the number of the operating compressors 1 .
  • the measured pressure signal increases and reaches to pressure level higher than desired pressure level by one stage. Then, the number which is subtracted by one from the number of the operating compressors 1 is determined as a new number of operating compressors. Meanwhile, the pressure signal decreases and reaches to pressure level lower than desired pressure level by one stage. Then, the number which is added by one to the number of the operating compressors 1 is determined as a new number of operating compressors.
  • a signal of the number determined in the determining portion 10 is transmitted to the selecting portion 11 that selects which compressors start or stop.
  • the selection is carried out with predetermined order of starting and stopping.
  • numeric order may be allotted to the compressors 1 which start and stop in the order. By the numeric order, any of the compressors 1 equally start and stop to avoid disadvantage that a specific compressor frequently starts and stops or is operating for a long time.
  • FIG. 2 is a graph that illustrates changes in pressure to the operating compressors 1 when the eight compressors 1 such as C 1 to C 8 are controlled.
  • Compressed air in the pressure tank 5 between the lower limit such as 0.6 MPa and the upper limit such as 0.7 MPa is divided in pressure into eight stages which are equal to the compressors 1 in number to determine each pressure level.
  • the lower and upper limits are set to level 0 and level 8/8 respectively, and 1/8 to 8/8 are set therebetween by dividing equally. Also, for example, desired pressure levels are set to 1/8 to 2/8. Continuous Nos. 1 to 8 are allotted to the eight compressors 1 .
  • Compressed air is used and the pressure level falls to 7/8 at P 11 .
  • a start signal is transmitted from the control 9 to the electromagnetic switch E 2 for the compressor No. 2 (C 2 ) which secondly stops, via the operating portion 12 , to start the compressor No. 2 .
  • the seven compressors No. 1 and Nos. 2 to 8 do not run yet.
  • Compressed air is used and the pressure level falls to 0/8 at P 18 .
  • a start signal is transmitted from the control 9 to electromagnetic switch E 1 for the compressor No. 1 (C 1 ) which stops ninthly, via the operating portion 12 to start the compressor No. 1 . All the compressors Nos. 1 to 8 run, and there is no compressor that does not run.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
US10/844,012 2003-05-15 2004-05-12 Method of controlling a plurality of compressors Abandoned US20040247452A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003137434A JP2004340024A (ja) 2003-05-15 2003-05-15 圧縮機の運転制御方法
JP2003-137434 2003-05-15

Publications (1)

Publication Number Publication Date
US20040247452A1 true US20040247452A1 (en) 2004-12-09

Family

ID=33028393

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/844,012 Abandoned US20040247452A1 (en) 2003-05-15 2004-05-12 Method of controlling a plurality of compressors

Country Status (6)

Country Link
US (1) US20040247452A1 (de)
EP (1) EP1477679B1 (de)
JP (1) JP2004340024A (de)
KR (1) KR100597864B1 (de)
CN (1) CN100592010C (de)
DE (1) DE602004002317T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10969149B2 (en) 2015-03-13 2021-04-06 Bitzer Kuehlmaschinenbau Gmbh Refrigerant compressor system

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20110352A1 (it) * 2011-06-20 2012-12-21 R C N Italia Di Acciaro Maria Lucia Apparecchiatura mobile per la produzione di aria compressa
CN102713293B (zh) * 2011-07-22 2013-08-28 三浦工业株式会社 压缩机台数控制系统
JP5915932B2 (ja) * 2012-02-10 2016-05-11 三浦工業株式会社 圧縮機台数制御システム
JP5915931B2 (ja) * 2012-02-10 2016-05-11 三浦工業株式会社 圧縮機台数制御システム
JP5758818B2 (ja) * 2012-02-15 2015-08-05 株式会社日立製作所 圧縮機システムおよびその運転制御方法
EP2955377B1 (de) * 2013-02-08 2021-09-22 Hitachi Industrial Equipment Systems Co., Ltd. Fluidverdichtersystem und steuerungsvorrichtung dafür
CN103727012A (zh) * 2013-12-04 2014-04-16 山东金阳矿业集团有限公司 一种联动运行控制的空气压缩机
CN104819141A (zh) * 2015-04-01 2015-08-05 宁波杭州湾新区祥源动力供应有限公司 一种空压站的控制方法及系统
CN105697349B (zh) * 2016-01-25 2018-03-09 中盐安徽润华盐业发展有限公司 盐袋包装机用空压机的电气控制电路
CN106438321B (zh) * 2016-07-12 2018-12-14 中车株洲电力机车有限公司 一种运行控制方法、系统和空气压缩机系统
IT201600114834A1 (it) * 2016-11-14 2018-05-14 Energy Way S R L Metodo di controllo di un impianto di produzione e distribuzione di aria compressa
KR101842942B1 (ko) 2016-12-27 2018-03-29 최동립 복수의 공기압축기 제어 시스템 및 그 제어 방법
KR101927381B1 (ko) 2017-10-12 2018-12-07 뉴모텍(주) 소형 공기 압축기를 포함한 공작기계 시스템
KR20240069873A (ko) 2022-11-11 2024-05-21 (주)안전정밀 베인 펌프용 로터 및 이를 이용한 베인 펌프

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6266952B1 (en) * 1998-10-28 2001-07-31 Ewan Choroszylow Process for controlling compressors
US6419454B1 (en) * 2000-06-14 2002-07-16 Leo P. Christiansen Air compressor control sequencer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2850589C2 (de) * 1978-11-22 1987-04-16 Frank Ebert Schaltvorrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6266952B1 (en) * 1998-10-28 2001-07-31 Ewan Choroszylow Process for controlling compressors
US6419454B1 (en) * 2000-06-14 2002-07-16 Leo P. Christiansen Air compressor control sequencer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10969149B2 (en) 2015-03-13 2021-04-06 Bitzer Kuehlmaschinenbau Gmbh Refrigerant compressor system

Also Published As

Publication number Publication date
DE602004002317D1 (de) 2006-10-26
JP2004340024A (ja) 2004-12-02
DE602004002317T2 (de) 2007-04-12
KR20040098582A (ko) 2004-11-20
KR100597864B1 (ko) 2006-07-10
EP1477679B1 (de) 2006-09-13
CN1550738A (zh) 2004-12-01
EP1477679A3 (de) 2005-06-15
CN100592010C (zh) 2010-02-24
EP1477679A2 (de) 2004-11-17

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AS Assignment

Owner name: ANEST IWATA CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SATO, KAZUAKI;REEL/FRAME:016532/0115

Effective date: 20040507

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION