US3785755A - Air compressor system - Google Patents

Air compressor system Download PDF

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Publication number
US3785755A
US3785755A US00201076A US3785755DA US3785755A US 3785755 A US3785755 A US 3785755A US 00201076 A US00201076 A US 00201076A US 3785755D A US3785755D A US 3785755DA US 3785755 A US3785755 A US 3785755A
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Prior art keywords
air
oil
outlet
heated
compressor
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Expired - Lifetime
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US00201076A
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W Novak
F Thurmond
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Rogers Machinery Co Inc
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Rogers Machinery Co Inc
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    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0007—Injection of a fluid in the working chamber for sealing, cooling and lubricating
    • 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
    • Y10S418/00—Rotary expansible chamber devices
    • Y10S418/01—Non-working fluid separation
    • 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
    • Y10S55/00—Gas separation
    • Y10S55/17—Compressed air water removal

Definitions

  • This invention relates to an improved air compressor system, and more particularly to an air compressor system wherein hot compressor oil is used to heat compressed air.
  • An object of the invention is to provide a new and improved air compressor system.
  • Another object of the invention is to provide an air compressor system wherein hot compressor oil is used to heat compressed air.
  • Another object of the invention is to provide an air compressor system which lowers the relative humidity of the delivered air.
  • Another object of the invention is to provide an air compressor system minimizing heat rejection.
  • Another object of the invention is to provide an air compressor system which heats the delivered air.
  • Another object of the invention is to provide an air compressor system which conserves a substantial portion of the heat of compression.
  • FIGURE is a schematic view of an improved air compressor system forming one embodiment of the invention.
  • an improved air compressor system forming one embodiment of the invention and including a knownoil-flooded screw compressor which compresses the air and pumps compressed air and oil through a known oil separator 12 at typical temperatures and pressures indicated on the drawing.
  • the oil seals and lubricates the screw compressor as usual in this type of a compressor, and also absorbs most of the heat generated by the compressing of the air which is, for many typical installations, compressed from room temperature and atmospheric pressure to 100 psi.
  • the air leaves oil separator 12 and enters aftercooler 13.
  • the air temperature is reduced by the aftercooler to a temperature below the dew point, and water conden sate is separated within a suitable, known moisture separator 14, and withdrawn through a drain trap 15.
  • a reheater 16 receives cool air withlOO percent relative humidity at the entering pressure condition.
  • the reheater 16 also receives hot oil from the oil separator 12 resulting in an exchange of heat, the compressed air being heated to the temperature for use and the oil being cooled to a temperature near that desired for reuse.
  • the air gains back the heat that was given up to the aftercooler l3 and leaves the reheater l6 warm and with a substantial reduction of relative humidity.
  • the oil is cooled as it passes through reheater 16 and flows back to the compressor 10 through an oil filter 17, an oil cooler 18 and an oil pump 19.
  • the coolant requirement for oil cooler 18 has been greatly reduced by the transfer of heat from the oil to the air at the reheater 16.
  • a known temperature sensor 21 actuates a known valve 22 to regulate cooling water supplied to the cooler 18. Typical temperatures, pressures and relative humidities are shown on the drawing adjacent the various stages of the system.
  • the above-described compressor system as contrasted with a system identical therewith except for omission of the reheater 16 requires 17 percent input power with a consequent reduction in cost of operation.
  • the above-described system lowers relative humidity by percent, lowers water consumption by 20 percent, reduces air line freeze-ups, and puts the energy normally lost in the oil cooler into the compressed air.
  • an oil flooded screw compressor having an air inlet and an air and oil outlet for compressing air whereby oil is heated
  • an air-oil-separator having an inlet connected to the air and oil outlet and also having an oil outlet and an air outlet for separating oil from the compressed air
  • an aftercooler having an outlet and an inlet connected to the air outlet for cooling the compressed air
  • a moisture separator having an outlet and an inlet connected to the outlet of the aftercooler for removing moisture from the cooled compressed air
  • a reheater heat exchanger having an air passage through which cooled compressed air from the moisture separator flows and also having an oil passage in heat exchanging relationship with the air passage and receiving oil from the air-oil separator
  • the air compressor system of claim 2 including an oil filter and an oil cooler positioned in series with and between the reheater heat exchanger and the pump UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,7 5,755 Dated January 15, 1974 Inventor(s) WALTER M. NOVAK and FRED A. THURMOND JR,

Abstract

Air and oil are flowed through an oil flooded screw compressor which heats the air and oil, after which the air and oil are separated and the air is cooled to extract moisture therefrom. Then the cooled air and the hot oil are passed through a heat exchanger which heats the air to a desired temperature for use and cools the oil to a desired temperature for recirculation through the compressor.

Description

limited States Patent [191 Novak et a1.
AIR COMPRESSOR SYSTEM Jan. 15, 1974 [73] Assignee: Rogers Machinery Company, Inc.,
, Portland, Oreg. Primary Examiner-Al Lawrence Smith Filed Nov 22 1971 Assistant Examiner-John J. Vrablik [21] App1.No.-.201,076
' 57 ABSTRACT 52 US. Cl 418 85 418 88, 418 97, 1 6/2/90 64/93 All and 011 are flowed through an 011 flooded screw [5 I F01: FZSd compressor Wl'llCl'l heats the air and 01], after which 58 Field of Search 418/83 85 86 88 the air and are separated and is 418/97 100. 55/267466. 7 extract moisture therefrom. Then the cooled air and 184/164 the hot oil are passed through a heat exchanger which heats the air to a desired temperature for use and [56] References Cited cools the oil to a desired temperature for recirculation UNITED STATES PATENTS through the compressor.
2,209,661 7/1940 Pickstone 62/93 3 Claims, 1 Drawing Figure a f AIR loops AFTE1l gig-50? l6 AIR COOL. ER 0 ZLE OUT 1 00 =/L.R.H. '32: R H 14 'OOPS'L lool st 12 15 SEPARATOR AUTO, 4
DRAIN CONDENSAT'E OUT WATER PATENTEU JAN 1 5 I974 m OQ E71 WALTER M. NOVAK FRED A. THURMOND JR INVENTORS.
BUCKHORN, BLORE, KLARQUIST 8| SPARKMAN ATTORNEYS AIR COMPRESSOR SYSTEM This invention relates to an improved air compressor system, and more particularly to an air compressor system wherein hot compressor oil is used to heat compressed air.
An object of the invention is to provide a new and improved air compressor system.
Another object of the invention is to provide an air compressor system wherein hot compressor oil is used to heat compressed air.
Another object of the invention is to provide an air compressor system which lowers the relative humidity of the delivered air.
Another object of the invention is to provide an air compressor system minimizing heat rejection.
Another object of the invention is to provide an air compressor system which heats the delivered air.
Another object of the invention is to provide an air compressor system which conserves a substantial portion of the heat of compression.
In the drawing, the single FIGURE is a schematic view of an improved air compressor system forming one embodiment of the invention.
Referring now in detail to the drawing, there is shown therein an improved air compressor system forming one embodiment of the invention and including a knownoil-flooded screw compressor which compresses the air and pumps compressed air and oil through a known oil separator 12 at typical temperatures and pressures indicated on the drawing. The oil seals and lubricates the screw compressor as usual in this type of a compressor, and also absorbs most of the heat generated by the compressing of the air which is, for many typical installations, compressed from room temperature and atmospheric pressure to 100 psi. The air leaves oil separator 12 and enters aftercooler 13. The air temperature is reduced by the aftercooler to a temperature below the dew point, and water conden sate is separated within a suitable, known moisture separator 14, and withdrawn through a drain trap 15. A reheater 16 receives cool air withlOO percent relative humidity at the entering pressure condition. The reheater 16 also receives hot oil from the oil separator 12 resulting in an exchange of heat, the compressed air being heated to the temperature for use and the oil being cooled to a temperature near that desired for reuse. The air gains back the heat that was given up to the aftercooler l3 and leaves the reheater l6 warm and with a substantial reduction of relative humidity. The oil is cooled as it passes through reheater 16 and flows back to the compressor 10 through an oil filter 17, an oil cooler 18 and an oil pump 19. The coolant requirement for oil cooler 18 has been greatly reduced by the transfer of heat from the oil to the air at the reheater 16. A known temperature sensor 21 actuates a known valve 22 to regulate cooling water supplied to the cooler 18. Typical temperatures, pressures and relative humidities are shown on the drawing adjacent the various stages of the system.
The above-described compressor system, as contrasted with a system identical therewith except for omission of the reheater 16 requires 17 percent input power with a consequent reduction in cost of operation. The above-described system lowers relative humidity by percent, lowers water consumption by 20 percent, reduces air line freeze-ups, and puts the energy normally lost in the oil cooler into the compressed air.
What is claimed is:
l. The method of producing compressed air comprising: I
compressing moisture laden air in an oil flooded screw compressor, whereby the air and oil are heated to a predetermined temperature,
separating the heated oil from the heated air,
cooling the heated air to a second temperature substantially less than said predetermined temperature,
removing moisture from the air so cooled, passing the air and the separated, heated oil through a heat exchanger to reheat the air and cool the oil,
and returning the cooled oil to the compressor.
2. In an air compressor system,
an oil flooded screw compressor having an air inlet and an air and oil outlet for compressing air whereby oil is heated,
an air-oil-separator having an inlet connected to the air and oil outlet and also having an oil outlet and an air outlet for separating oil from the compressed air,
an aftercooler having an outlet and an inlet connected to the air outlet for cooling the compressed air,
a moisture separator having an outlet and an inlet connected to the outlet of the aftercooler for removing moisture from the cooled compressed air,
a reheater heat exchanger having an air passage through which cooled compressed air from the moisture separator flows and also having an oil passage in heat exchanging relationship with the air passage and receiving oil from the air-oil separator,
and pump means for pumping oil from the separator,
through the reheater heat exchanger, to the compressor.
3. The air compressor system of claim 2 including an oil filter and an oil cooler positioned in series with and between the reheater heat exchanger and the pump UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,7 5,755 Dated January 15, 1974 Inventor(s) WALTER M. NOVAK and FRED A. THURMOND JR,
It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected asshown below:
Column 2, line 8, after "17 percent" insert -less-- Signed and sealed this 21st day of May 1974.
(SEAL) Attest:
EDWARD M.FLETCHER,JR. I C. MARSHALL DANN Attesting Officer Commissioner 'of Patents

Claims (3)

1. The method of producing compressed air comprising: compressing moisture laden air in an oil flooded screw compressor, whereby the air and oil are heated to a predetermined temperature, separating the heated oil from the heated air, cooling the heated air to a second temperature substantially less than said predetermined temperature, removing moisture from the air so cooled, passing the air and the separated, heated oil through a heat exchanger to reheat the air and cool the oil, and returning the cooled oil to the compressor.
2. In an air compressor system, an oil flooded screw compressor having an air inlet and an air and oil outlet for compressing air whereby oil is heated, an air-oil separator having an inlet connected to the air and oil outlet and also having an oil outlet and an air outlet for separating oil from the compressed air, an aftercooler having an outlet and an inlet connected to the air outlet for cooling the compressed air, a moisture separator having an outlet and an inlet connected to the outlet of the aftercooler for removing moisture from the cooled compressed air, a reheater heat exchanger having an air passage through which cooled compressed air from the moisture separator flows and also having an oil passage in heat exchanging relationship with the air passage and receiving oil from the air-oil separator, and pump means for pumping oil from the separator, through the reheater heat exchanger, to the compressor.
3. The air compressor system of claim 2 including an oil filter and an oil cooler positioned in series with and between the reheater heat exchanger and the pump means.
US00201076A 1971-11-22 1971-11-22 Air compressor system Expired - Lifetime US3785755A (en)

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Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404737A1 (en) * 1977-09-28 1979-04-27 Uniscrew Ltd WATER INJECTION MOTOR MACHINE
EP0007295A2 (en) * 1978-07-11 1980-01-23 Atlas Copco Aktiebolag Liquid-injected compressor device
US4343348A (en) * 1978-06-02 1982-08-10 The Allen Group Apparatus and methods for simulating varying atmospheric conditions
US4431390A (en) * 1981-10-23 1984-02-14 Dresser Industries, Inc. Condensation control apparatus for oil-flooded compressors
FR2553827A1 (en) * 1983-10-21 1985-04-26 Volkswagenwerk Ag Vehicle IC engine with supercharger and charge cooler
US4517813A (en) * 1983-07-05 1985-05-21 The Boeing Company Air conditioning system and air mixing/water separation apparatus therein
US4569640A (en) * 1982-05-13 1986-02-11 Bernard Zimmern Device for high pressure compression
US4898599A (en) * 1989-05-12 1990-02-06 Pneumatic Products Corporation Desiccant gas drying system
EP0437637A1 (en) * 1989-11-20 1991-07-24 KKW Kulmbacher Klimageräte-Werk GmbH Liquid ring pump
US5087178A (en) * 1990-01-04 1992-02-11 Rogers Machinery Company, Inc. Oil flooded screw compressor system with moisture separation and heated air dryer regeneration, and method
US5099976A (en) * 1990-10-19 1992-03-31 W. B. Jamison Limited Partnership Fire extinguishing apparatus for compressors
EP0486726A1 (en) * 1990-11-23 1992-05-27 Siemens Aktiengesellschaft Liquid ring pump
WO1994003764A1 (en) * 1992-07-31 1994-02-17 Tazzari Sport Division S.R.L. Low-pressure automatic programmable artificial snow making plant
US5399073A (en) * 1994-01-28 1995-03-21 Bauer-Kompressoren Gmbh Compressor unit with condensate filter and oil disposal system
US5699673A (en) * 1993-12-24 1997-12-23 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Compressed dry air supply system
US5797980A (en) * 1996-03-27 1998-08-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for the treatment of atomospheric air
US5925169A (en) * 1996-04-02 1999-07-20 Altas Copco Airpower, Naamloze Vennootschap Method and device for drying a gas which has been compressed by a compressor
US5993522A (en) * 1998-05-13 1999-11-30 Huang; Chin-Fu Compressed air strainer and drying treatment
US6082982A (en) * 1997-11-17 2000-07-04 Uop Llc Flooded compressor with improved oil reclamation
US20040007133A1 (en) * 2002-03-22 2004-01-15 Sun Yung-Yung Air-liquid separating apparatus for compressed air
US6695602B2 (en) * 2000-03-30 2004-02-24 Svenska Rotor Maskiner Ab Bacterial growth inhibition in a circulation system comprising a compressor
WO2006025745A1 (en) * 2004-08-30 2006-03-09 Terje Engervik Arrangement and method for treatment of compressed gas
EP1947348A2 (en) * 2006-10-24 2008-07-23 Ingersoll-Rand Energy Systems Fuel compression system with internal reheat for dew point suppression
US20090120114A1 (en) * 2007-11-12 2009-05-14 Ingersoll-Rand Company Compressor with flow control sensor
CN101311534B (en) * 2008-02-18 2011-06-15 马军 Sieve trap device fixed between vacuum pump and container and method of use thereof
CN102712008A (en) * 2010-01-21 2012-10-03 建筑研究和技术有限公司 Concrete spraying method using heat recovery
WO2012149181A1 (en) * 2011-04-26 2012-11-01 Norfolk Southern Corporation Multiple compressor system and method for locomotives
US20130125743A1 (en) * 2011-05-20 2013-05-23 Robert Adler Compression of media
CN103277312A (en) * 2013-06-24 2013-09-04 北京复盛机械有限公司 Novel screw air compressor
US20140271258A1 (en) * 2013-03-15 2014-09-18 Ingersoll-Rand Company Temperature control for compressor
US20150361975A1 (en) * 2014-06-13 2015-12-17 Clark Equipment Company Air compressor discharge system
US20180320638A1 (en) * 2017-05-04 2018-11-08 Clark Equipment Company Source of water for water injection system
US20190024651A1 (en) * 2015-12-25 2019-01-24 Hitachi, Ltd. Air Compressor
US10208754B2 (en) * 2015-10-08 2019-02-19 Ingersoll-Rand Company Oil flooded compressor system and method
US10677120B2 (en) * 2017-05-16 2020-06-09 Fusheng Industrial (Shanghai) Co., Ltd Built-in oil-gas separating device
WO2020217156A1 (en) * 2019-04-24 2020-10-29 Atlas Copco Airpower, Naamloze Vennootschap Compressor installation and method for delivering a compressed gas
BE1027361B1 (en) * 2019-06-12 2021-01-20 Atlas Copco Airpower Nv Compressor plant and method for supplying compressed gas
US11047390B2 (en) * 2017-09-06 2021-06-29 Hitachi, Ltd. Oil feed type air compressor
US11280247B2 (en) * 2019-07-30 2022-03-22 Vanair Manufacturing, Inc. Pneumatic system and method for heating compressor oil and/or components of the system
US11578723B2 (en) * 2016-09-21 2023-02-14 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Screw compressor for a utility vehicle

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US1672571A (en) * 1926-03-27 1928-06-05 Leonard Pump & Motor Co Compressor
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US2323802A (en) * 1939-06-22 1943-07-06 Wagner Electric Corp Lubricating and oil separating system for compressors
US2361393A (en) * 1941-11-26 1944-10-31 Wagner Electric Corp Oil and water separating system for association with air compressors
US3191854A (en) * 1960-06-02 1965-06-29 Atlas Copco Ab Compressor units
US3473298A (en) * 1967-12-26 1969-10-21 Westinghouse Electric Corp Moisture content and combustion product removal apparatus for exhaust gases

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1672571A (en) * 1926-03-27 1928-06-05 Leonard Pump & Motor Co Compressor
US2209661A (en) * 1937-11-20 1940-07-30 Superheater Co Ltd Cooling, drying, and reheating compressed air
US2323802A (en) * 1939-06-22 1943-07-06 Wagner Electric Corp Lubricating and oil separating system for compressors
US2361393A (en) * 1941-11-26 1944-10-31 Wagner Electric Corp Oil and water separating system for association with air compressors
US3191854A (en) * 1960-06-02 1965-06-29 Atlas Copco Ab Compressor units
US3473298A (en) * 1967-12-26 1969-10-21 Westinghouse Electric Corp Moisture content and combustion product removal apparatus for exhaust gases

Cited By (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404737A1 (en) * 1977-09-28 1979-04-27 Uniscrew Ltd WATER INJECTION MOTOR MACHINE
US4343348A (en) * 1978-06-02 1982-08-10 The Allen Group Apparatus and methods for simulating varying atmospheric conditions
EP0007295A2 (en) * 1978-07-11 1980-01-23 Atlas Copco Aktiebolag Liquid-injected compressor device
EP0007295A3 (en) * 1978-07-11 1980-02-06 Atlas Copco Aktiebolag Liquid-injected compressor device
US4289461A (en) * 1978-07-11 1981-09-15 Atlas Copco Aktiebolag Liquid injected compressor with temperature control of liquid
US4431390A (en) * 1981-10-23 1984-02-14 Dresser Industries, Inc. Condensation control apparatus for oil-flooded compressors
US4569640A (en) * 1982-05-13 1986-02-11 Bernard Zimmern Device for high pressure compression
US4517813A (en) * 1983-07-05 1985-05-21 The Boeing Company Air conditioning system and air mixing/water separation apparatus therein
FR2553827A1 (en) * 1983-10-21 1985-04-26 Volkswagenwerk Ag Vehicle IC engine with supercharger and charge cooler
US4898599A (en) * 1989-05-12 1990-02-06 Pneumatic Products Corporation Desiccant gas drying system
EP0437637A1 (en) * 1989-11-20 1991-07-24 KKW Kulmbacher Klimageräte-Werk GmbH Liquid ring pump
US5087178A (en) * 1990-01-04 1992-02-11 Rogers Machinery Company, Inc. Oil flooded screw compressor system with moisture separation and heated air dryer regeneration, and method
US5099976A (en) * 1990-10-19 1992-03-31 W. B. Jamison Limited Partnership Fire extinguishing apparatus for compressors
EP0486726A1 (en) * 1990-11-23 1992-05-27 Siemens Aktiengesellschaft Liquid ring pump
WO1994003764A1 (en) * 1992-07-31 1994-02-17 Tazzari Sport Division S.R.L. Low-pressure automatic programmable artificial snow making plant
US5699673A (en) * 1993-12-24 1997-12-23 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Compressed dry air supply system
US5399073A (en) * 1994-01-28 1995-03-21 Bauer-Kompressoren Gmbh Compressor unit with condensate filter and oil disposal system
US5797980A (en) * 1996-03-27 1998-08-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for the treatment of atomospheric air
US5925169A (en) * 1996-04-02 1999-07-20 Altas Copco Airpower, Naamloze Vennootschap Method and device for drying a gas which has been compressed by a compressor
US6082982A (en) * 1997-11-17 2000-07-04 Uop Llc Flooded compressor with improved oil reclamation
US5993522A (en) * 1998-05-13 1999-11-30 Huang; Chin-Fu Compressed air strainer and drying treatment
US6695602B2 (en) * 2000-03-30 2004-02-24 Svenska Rotor Maskiner Ab Bacterial growth inhibition in a circulation system comprising a compressor
US20040007133A1 (en) * 2002-03-22 2004-01-15 Sun Yung-Yung Air-liquid separating apparatus for compressed air
US6793701B2 (en) * 2002-03-22 2004-09-21 Sun Yung-Yung Air-liquid separating apparatus for compressed air
WO2006025745A1 (en) * 2004-08-30 2006-03-09 Terje Engervik Arrangement and method for treatment of compressed gas
US20080031742A1 (en) * 2004-08-30 2008-02-07 Terje Engervik Arrangement and Method for Treatment of Compressed Gas
JP2008511793A (en) * 2004-08-30 2008-04-17 テリエ アンゲルヴィク， Apparatus and method for treatment of compressed gas
EP1947348A2 (en) * 2006-10-24 2008-07-23 Ingersoll-Rand Energy Systems Fuel compression system with internal reheat for dew point suppression
EP1947348A3 (en) * 2006-10-24 2014-09-17 FlexEnergy Energy Systems, Inc. Fuel compression system with internal reheat for dew point suppression
US20090120114A1 (en) * 2007-11-12 2009-05-14 Ingersoll-Rand Company Compressor with flow control sensor
US7762789B2 (en) * 2007-11-12 2010-07-27 Ingersoll-Rand Company Compressor with flow control sensor
CN101311534B (en) * 2008-02-18 2011-06-15 马军 Sieve trap device fixed between vacuum pump and container and method of use thereof
CN102712008A (en) * 2010-01-21 2012-10-03 建筑研究和技术有限公司 Concrete spraying method using heat recovery
US20120312891A1 (en) * 2010-01-21 2012-12-13 Dieter Mai Concrete Spraying Method Using Heat Recovery
WO2012149181A1 (en) * 2011-04-26 2012-11-01 Norfolk Southern Corporation Multiple compressor system and method for locomotives
US9302682B2 (en) 2011-04-26 2016-04-05 Norfolk Southern Corporation Multiple compressor system and method for locomotives
US8920538B2 (en) * 2011-05-20 2014-12-30 Linde Aktiengesellschaft Compression of media
US20130125743A1 (en) * 2011-05-20 2013-05-23 Robert Adler Compression of media
US9702358B2 (en) * 2013-03-15 2017-07-11 Ingersoll-Rand Company Temperature control for compressor
US20140271258A1 (en) * 2013-03-15 2014-09-18 Ingersoll-Rand Company Temperature control for compressor
EP2789855A3 (en) * 2013-03-15 2014-12-03 Ingersoll-Rand Company Temperature control for compressor
CN103277312A (en) * 2013-06-24 2013-09-04 北京复盛机械有限公司 Novel screw air compressor
US20150361975A1 (en) * 2014-06-13 2015-12-17 Clark Equipment Company Air compressor discharge system
US10378536B2 (en) * 2014-06-13 2019-08-13 Clark Equipment Company Air compressor discharge system
US10208754B2 (en) * 2015-10-08 2019-02-19 Ingersoll-Rand Company Oil flooded compressor system and method
US10711785B2 (en) 2015-10-08 2020-07-14 Ingersoll-Rand Industrial U.S., Inc. Oil flooded compressor system and method
US10920760B2 (en) * 2015-12-25 2021-02-16 Hitachi, Ltd. Air compressor having an oil separator, an oil cooler, first and second evaporators, and wherein intake air and the oil are simultaneously cooled in the first and second evaporators
US20190024651A1 (en) * 2015-12-25 2019-01-24 Hitachi, Ltd. Air Compressor
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