EP1979615A1 - Systeme et procede de controle d'un compresseur a ecoulement d'air - Google Patents

Systeme et procede de controle d'un compresseur a ecoulement d'air

Info

Publication number
EP1979615A1
EP1979615A1 EP07762731A EP07762731A EP1979615A1 EP 1979615 A1 EP1979615 A1 EP 1979615A1 EP 07762731 A EP07762731 A EP 07762731A EP 07762731 A EP07762731 A EP 07762731A EP 1979615 A1 EP1979615 A1 EP 1979615A1
Authority
EP
European Patent Office
Prior art keywords
pressure
compressor
compression system
gas compression
speed
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.)
Withdrawn
Application number
EP07762731A
Other languages
German (de)
English (en)
Other versions
EP1979615A4 (fr
Inventor
Jimmy L. Levan
Vipul R. Mistry
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.)
Ingersoll Rand Co
Original Assignee
Ingersoll Rand Co
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 Ingersoll Rand Co filed Critical Ingersoll Rand Co
Publication of EP1979615A1 publication Critical patent/EP1979615A1/fr
Publication of EP1979615A4 publication Critical patent/EP1979615A4/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure
    • 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
    • F04B49/08—Regulating by delivery pressure
    • 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
    • F04B49/20—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 by changing the driving speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0209—Rotational speed
    • 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
    • F04B2205/08—Pressure difference over a throttle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/86—Detection

Definitions

  • the present invention relates to gas compressor systems. More particularly, the invention relates to a control system for a gas compressor system.
  • Compressed gas and particularly air
  • Compressor systems can be used in many applications such as for process, shop air, or other applications.
  • Compressor systems generally include several components disposed within one or more housings. Exemplary components of these systems include a motor and drive assembly, a compressor module, and a separator system (moisture and /or oil).
  • the motor may drive the compressor module through a belt and pulley system " that transfers power from the motor to the compressor module, other to other transmission systems, or may directly drive the compressor module.
  • the air In many compressed air systems, the air carries an amount of moisture and, in some constructions, lubricants that are trapped in the air as part of the compression process.
  • Many compressor systems include an air dryer that operates to remove a significant portion of the moisture from the air. The air dryer dries the compressed air with a drying process that may include cooling, absorption, adsorption, and the like. During the air drying process, there is generally a pressure drop within the flow of compressed air. Thus, the air dryer reduces the overall efficiency of the compressor system.
  • a controller is used to increase an efficiency of an airflow system by monitoring pressure values at several points of the system. Increased efficiency reduces energy costs and can also reduce maintenance necessity.
  • the controller can dynamically measure and monitor a pressure differential between a plurality of pressure points. For example, the controller can monitor a discharge (after-cooler) pressure value at or near a compressor discharge. Similarly, the controller can also monitor a system discharge pressure at or near a dryer, or at or near a point-of-use.
  • the controller uses the pressure differential between the discharge (after-cooler) pressure value and the system discharge pressure to dynamically change or adjust a speed of the compressor to maintain a desired quantity of air flow at a desired pressure at the point-of-use, while reducing or minimizing an energy or power consumption demanded by a motor and the controller.
  • the invention provides a gas compression system that is operable to deliver a flow of compressed gas to a point of use.
  • the gas compression system includes a compressor that is operable to produce a flow of compressed gas at a first pressure, a motor operable to drive the compressor at a compressor speed, and a gas treatment member positioned to receive the flow of compressed gas from the compressor and deliver the flow of compressed gas to the point of use at a second pressure.
  • a controller is operable to vary the compressor speed in response to a difference between the first pressure and the second pressure.
  • the invention provides a method of controlling airflow generated by a compressor.
  • the method includes the steps of measuring a first pressure value associated with the compressor, measuring a second pressure value indicative of a rate of use of air at a point of use, and determining a pressure differential between the first pressure value and the second pressure value.
  • the method also includes adjusting a motor speed based at least partially on the pressure differential.
  • the invention provides a gas compression system that is operable to deliver a flow of compressed gas to a point of use.
  • the gas compression system includes a compressor that is operable to produce a flow of compressed gas at a first pressure and a variable speed motor that is operable to drive the compressor at a compressor speed between a low speed and a high speed.
  • a dryer is positioned to receive the flow of compressed air from the compressor and deliver a flow of dried compressed air to the point of use at a second pressure.
  • a first pressure sensor is positioned to measure the first pressure and generate a first signal indicative of the first pressure, and a second pressure sensor is positioned to measure the second pressure and generate a second signal indicative of the second pressure.
  • a controller is operable to receive the first signal and the second signal and to calculate a third signal indicative of the pressure difference between the first pressure and the second pressure. The controller is also operable to vary the compressor speed in response to the third signal.
  • FIG. 1 is an airflow system embodying the present invention.
  • FIG. 2 is a flow chart of processing carried out in some embodiments of the invention.
  • FIG. 1 shows an airflow system 100 in a schematic format.
  • the airflow system 100 includes a compressor module 104 that is controlled by a controller 108.
  • the compressor module 104 includes an engine or a motor 112 and a compressor 116.
  • the compressor includes a housing that contains one or more moving elements that operate to compress fluid within the compressor 116.
  • a rotary screw compressor is employed with other constructions employing other types of compressors (e.g., centrifugal, reciprocating, gear, gerotor, and the like).
  • the motor 112 includes an output shaft 118 that couples to the compressor 116 to drive the moving element or elements and generate compressed air. In one construction, the motor 112 operates at a fixed speed.
  • a variable speed drive such as a variable frequency drive 120 controls the motor 112 and operates the motor 112 and the compressor 116 within a desired speed range.
  • the drive 120 is able to vary the quantity and the pressure of the compressed air discharged at a compressor discharge 122.
  • a compressor discharge pressure sensor 128 is disposed near the compressor discharge 122 or in piping 124 downstream of the discharge 122 to measure a discharge pressure of the compressed air.
  • the pressure sensor 128 can continuously measure the discharge pressure or can periodically sample the discharge pressure.
  • the pressure sensor 128 generates an electrical signal indicative of the measured discharge pressure and transmits that signal to the controller 108 for use.
  • the airflow system 100 also includes an air dryer 132 that receives the compressed air from the compressor module 104 through the piping 124.
  • the air dryer 132 dries the compressed air to reduce the dew point of the air and inhibit condensation.
  • the dryer 132 first cools the air flow to produce condensation within the flow of compressed air.
  • the flow is then directed to a moisture separator that removes the condensed water.
  • the stream of compressed air is then heated well above its dew point, thus making the condensation of water during use of the air less likely.
  • a desiccant drying system is employed. In the desiccant drying system, the stream of compressed air is passed through a water-absorbing substance that removes moisture from the flow of compressed air.
  • the air dryer 132 can include a cycling or a non-cycling dryer 132, depending on applications at hand.
  • any air-drying system produces a pressure drop in the flow of compressed air.
  • the greater the quantity of flow in any given system the greater the pressure drop.
  • the drying module 132 discharges the dry air through piping 136 to a point-of-use 138.
  • An isolation valve 139 may be fitted at the point-of-use 138 if desired.
  • a dryer discharge pressure sensor 140 is positioned near a dryer discharge 142 or in the piping 136 downstream of the dryer 132 to measure a dryer discharge pressure.
  • the dryer discharge pressure sensor 140 can continuously measure the dryer discharge pressure or can W
  • the dryer discharge pressure sensor 140 periodically sample the dryer discharge pressure.
  • the dryer discharge pressure sensor 140 generates an electrical signal indicative of the measured dryer discharge pressure and transmits that signal to the controller 108 for use.
  • the controller 108 receives the discharge pressure sensor signal and the dryer discharge pressure sensor signal and uses these two signals along with a reference to generate a control signal. More specifically, the controller 108 uses the two sensor signals to calculate a pressure difference or a pressure differential. This calculated value is then compared to the reference to generate the control signal. The control signal is then transmitted to the variable frequency drive 120 to control the speed of the motor 112 and the compressor 116.
  • FIG.2 is a flow chart 200 that further illustrates processes that occur in some embodiments of the invention including processes that may be carried out by software, firmware, or hardware.
  • the compressor discharge pressure sensor 128 dynamically monitors or senses the pressure generated by the compressor module 104 at the compressor module discharge 122 at block 204.
  • the dryer discharge pressure senor 140 also dynamically monitors or measures the pressure associated with the drying module 132 at the drying module discharge 142 at block 2OS.
  • the controller 108 dynamically determines a difference between the pressure values measured by the compressor discharge pressure sensor 128 and the dryer discharge pressure sensor 140.
  • the controller 108 compares the calculated pressure differential to the reference 148 such as a desired pressure differential.
  • the controller 108 then dynamically changes or adjusts a control signal based on this comparison, and transmits this control signal to the variable frequency drive 120.
  • the variable frequency drive 120 adjusts the driving frequency of the motor 112 at block 216 based on the pressure differential.
  • the controller 108 transmits the driving frequency signal to the compressor module 104 to drive the motor 112, which in turn drives the compressor 116.
  • the controller 108 also drives the drying module 132 based on the pressure differential calculated at block 224. In this way, the operating speeds of the motor 112 and the speed of the compressor 116 within the compressor module 104 are maintained at a speed that produces the needed quantity of air at the needed pressure, thereby reducing the power consumption of the motor 112 and/or the variable frequency drive 120.
  • the motor 112 operates to rotate the compressor 116.
  • the compressor 116 outputs a quantity of compressed air at a pressure in response to rotation of the motor 112.
  • the compressor discharge sensor 128 measures the pressure of the compressed air at the compressor discharge 122 and transmits a signal indicative of this value to the controller 108.
  • the compressed air then flows through the air dryer 132 where some of the moisture contained within the compressed air is removed. As the compressed air flows through the air dryer 132, a pressure drop occurs. The magnitude of the pressure drop is largely a function of the mass flow or flow velocity through the air dryer 132, with higher mass flows or flow velocities producing larger pressure drops.
  • the dryer discharge pressure sensor 140 measures the pressure of the compressed air and transmits a signal indicative of this measured value to the controller 108.
  • the compressed air then flows to the point-of-use 138, such as a manifold or a distribution center. Meanwhile, the controller 108 calculates the pressure difference between the measured pressure values and compares this difference to the reference to generate the control signal.
  • the flow of air at the point-of-use 138 drops to zero or very near zero.
  • the pressure drop becomes smaller and the difference between the compressor discharge pressure and the air dryer discharge pressure approaches zero.
  • the control signal generated by the controller 108 continues to indicate to the variable frequency drive 120 to slow the motor operation to reduce the flow from the compressor 116.
  • a threshold pressure difference is reached and the controller 108 sends a signal to the variable frequency drive 120 that stops operation of the compressor 116.
  • the present control system can be used to control a multi- compressor system as well as the single compressor system described above.
  • the controller may control several variable frequency drives in parallel, may control one variable frequency drive and one or more fixed speed compressors, may control several variable frequency drives in series, or may control several fixed speed drives in series.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

L'invention concerne un système de compression de gaz pouvant fonctionner de manière à distribuer un flux de gaz comprimé à un point d'utilisation. Le système de compression de gaz comprend un compresseur utilisé pour produire un flux de gaz comprimé à une première pression, un moteur utilisé pour entraîner le compresseur à une vitesse de de rotation du compresseur, et un élément de traitement de gaz positionné pour recevoir le flux de gaz comprimé provenant du compresseur et distribuer le flux de gaz comprimé au point d'utilisation à une seconde pression. Un dispositif de commande peut faire varier la vitesse de rotation du compresseur en réponse à une différence entre la première pression et la seconde pression.
EP07762731A 2006-02-01 2007-01-30 Systeme et procede de controle d'un compresseur a ecoulement d'air Withdrawn EP1979615A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76424306P 2006-02-01 2006-02-01
PCT/US2007/002643 WO2007089842A1 (fr) 2006-02-01 2007-01-30 Systeme et procede de controle d'un compresseur a ecoulement d'air

Publications (2)

Publication Number Publication Date
EP1979615A1 true EP1979615A1 (fr) 2008-10-15
EP1979615A4 EP1979615A4 (fr) 2011-03-30

Family

ID=38327728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07762731A Withdrawn EP1979615A4 (fr) 2006-02-01 2007-01-30 Systeme et procede de controle d'un compresseur a ecoulement d'air

Country Status (4)

Country Link
US (1) US20070177983A1 (fr)
EP (1) EP1979615A4 (fr)
CN (1) CN101379294A (fr)
WO (1) WO2007089842A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110194904A1 (en) * 2009-06-26 2011-08-11 Accessible Technologies, Inc. Controlled Inlet of Compressor for Pneumatic Conveying System
CN102788006A (zh) * 2012-08-29 2012-11-21 上海昶嘉工业设备有限公司 嵌入式空压机控制系统
US9071110B2 (en) * 2012-10-16 2015-06-30 Eht International Inc. Abnormality detection method and apparatus
CN103009960B (zh) * 2012-12-26 2015-02-04 潍柴动力股份有限公司 一种电动汽车用电动空气压缩系统的监测设备及方法
US20150260397A1 (en) * 2014-03-17 2015-09-17 Honeywell International Inc. Integrated smoke monitoring and control system for flaring operations
US10161400B2 (en) * 2014-07-21 2018-12-25 Danfoss Scroll Technologies, Llc Snap-in temperature sensor for scroll compressor
US10080990B2 (en) 2015-10-04 2018-09-25 Graham-White Manufacturing Company Air dryer
CN106870339A (zh) * 2016-12-08 2017-06-20 台州市德瑞压缩机有限公司 一种新能源汽车的气动动力系统
JP7072463B2 (ja) * 2018-07-31 2022-05-20 コベルコ・コンプレッサ株式会社 圧縮機およびその運転方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942421A (en) * 1957-07-31 1960-06-28 Sundstrand Corp Hydraulic transmission
US3584977A (en) * 1969-04-17 1971-06-15 Du Pont Process for metering liquid through serially connected pumps
US4527953A (en) * 1984-10-12 1985-07-09 E. I. Du Pont De Nemours And Company Pump unit for sampling air
US5295790A (en) * 1992-12-21 1994-03-22 Mine Safety Appliances Company Flow-controlled sampling pump apparatus
US5627769A (en) * 1994-11-24 1997-05-06 Sarlin-Hydor Oy Method and control system for controlling a fluid compression system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3574509A (en) * 1969-02-14 1971-04-13 Zurn Ind Inc Backwash filter
US3568771A (en) * 1969-04-17 1971-03-09 Borg Warner Method and apparatus for lifting foaming crude by a variable rpm submersible pump
CA2053055C (fr) * 1990-10-11 1997-02-25 Tsukasa Mizuno Systeme de refroidissement par liquide pour boitiers lsi
JPH05141831A (ja) * 1991-11-15 1993-06-08 Nec Corp 液体冷媒循環量制御構造
US5580221A (en) * 1994-10-05 1996-12-03 Franklin Electric Co., Inc. Motor drive circuit for pressure control of a pumping system
WO1997044719A1 (fr) * 1996-05-22 1997-11-27 Ingersoll-Rand Company Procede de prediction de l'apparition d'une surpression dans un compresseur centrifuge
JP3377721B2 (ja) * 1997-06-30 2003-02-17 三菱重工業株式会社 製紙用原料圧力脈動吸収装置
CN1290328A (zh) * 1997-10-28 2001-04-04 科尔特克工业公司 压缩机系统以及用于控制压缩机系统的方法
BE1011782A3 (nl) * 1998-03-10 2000-01-11 Atlas Copco Airpower Nv Compressoreenheid en daarbij gebruikte regelinrichting.
US6036449A (en) * 1998-03-24 2000-03-14 Cummins Engine Company, Inc. Air compressor control
SE512802C2 (sv) * 1998-09-14 2000-05-15 Volvo Lastvagnar Ab Anordning och förfarande vid reglering av luftkompressor
US6688320B2 (en) * 2000-11-10 2004-02-10 Flowtronex Psi, Inc. Utility conservation control methodology within a fluid pumping system
ES2544745T3 (es) * 2004-09-09 2015-09-03 Alstom Technology Ltd Instalación de suministro de gas para una turbina de gas y procedimiento de funcionamiento correspondiente
US20060162552A1 (en) * 2005-01-26 2006-07-27 Mohawk Valley Energy Solutions, Inc. Systems and methods for controlling room air quality

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942421A (en) * 1957-07-31 1960-06-28 Sundstrand Corp Hydraulic transmission
US3584977A (en) * 1969-04-17 1971-06-15 Du Pont Process for metering liquid through serially connected pumps
US4527953A (en) * 1984-10-12 1985-07-09 E. I. Du Pont De Nemours And Company Pump unit for sampling air
US5295790A (en) * 1992-12-21 1994-03-22 Mine Safety Appliances Company Flow-controlled sampling pump apparatus
US5627769A (en) * 1994-11-24 1997-05-06 Sarlin-Hydor Oy Method and control system for controlling a fluid compression system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007089842A1 *

Also Published As

Publication number Publication date
WO2007089842A1 (fr) 2007-08-09
CN101379294A (zh) 2009-03-04
US20070177983A1 (en) 2007-08-02
EP1979615A4 (fr) 2011-03-30

Similar Documents

Publication Publication Date Title
US20070177983A1 (en) Airflow compressor control system and method
JP6029807B2 (ja) 吸着乾燥装置、吸着乾燥ユニットおよび吸着乾燥方法
US20080038127A1 (en) Screw compressor
WO2009121151A1 (fr) Procédé de refroidissement d'un élément compresseur à injection de liquide et élément compresseur à injection de liquide permettant la mise en application d'un tel procédé
US20190249660A1 (en) Method for controlling the outlet temperature of an oil injected compressor or vacuum pump and oil injected compressor or vacuum pump implementing such method
CN1250868A (zh) 一种用于生产不同气体产量的方法和设备
CN210623084U (zh) 喷油多级压缩机系统
US20180245594A1 (en) Pump system including a controller
CA2574338A1 (fr) Systeme de commande a compresseurs multiples
KR102233418B1 (ko) 오일 주입식 압축기를 구동하는 모터의 속도를 제어하기 위한 제어기 유닛 및 상기 속도를 제어하는 방법
EP1946819B1 (fr) Contrôle de dessiccation d'air préemptive dans un système d'air comprimé
WO2006007072A2 (fr) Systeme de commande de compresseur de fluide gazeux
EP1320683B1 (fr) Compresseurs a vis a injection d'huile a vitesse variable
JP5058143B2 (ja) オイルフリースクロール圧縮機
JP2004176938A (ja) 冷凍サイクルの制御方法
CN218221797U (zh) 一种压缩气体的干燥器系统
US20240123396A1 (en) Fad dryer regulating system and method
KR100315959B1 (ko) 2단 원심압축기의 성능시험장치
JP7315368B2 (ja) 圧縮機及び圧縮機管理システム
WO2023203515A1 (fr) Surveillance et commande à base de température d'un séchoir à gaz comprimé
JP2001179033A (ja) 圧縮空気除湿装置
CN115989363A (zh) 供油式空气压缩机
JP2005246336A (ja) 圧縮空気除湿装置
CN116498525A (zh) 用于控制气体压缩设备中第一基准温度的方法
CN113503256A (zh) 一种中高压螺杆压缩机及排气量和气容比的控制方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080729

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE ES FR GB IT

A4 Supplementary search report drawn up and despatched

Effective date: 20110301

RIC1 Information provided on ipc code assigned before grant

Ipc: F04B 49/06 20060101ALI20110223BHEP

Ipc: F04B 49/08 20060101ALI20110223BHEP

Ipc: F04D 27/00 20060101ALI20110223BHEP

Ipc: F04B 49/20 20060101AFI20070911BHEP

Ipc: F04C 28/00 20060101ALI20110223BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110920