US20070148009A1 - Vacuum ejector pumps - Google Patents

Vacuum ejector pumps Download PDF

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Publication number
US20070148009A1
US20070148009A1 US11/658,382 US65838207A US2007148009A1 US 20070148009 A1 US20070148009 A1 US 20070148009A1 US 65838207 A US65838207 A US 65838207A US 2007148009 A1 US2007148009 A1 US 2007148009A1
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US
United States
Prior art keywords
nozzle body
cover
vacuum ejector
ejector pump
opening
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
US11/658,382
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English (en)
Inventor
Ho-Young Cho
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20070148009A1 publication Critical patent/US20070148009A1/en
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
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
    • F04F5/22—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating of multi-stage type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/467—Arrangements of nozzles with a plurality of nozzles arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/48—Control
    • F04F5/52—Control of evacuating pumps

Definitions

  • the present invention relates generally to vacuum ejector pumps, operated by compressed air which flows in and out at high velocity, thus creating negative pressure in a space, and more particularly to a vacuum ejector pump, which includes a cylindrical nozzle body having one or more mounting nozzles therein, and a cover mounted to the nozzle body to cover an opening formed at a predetermined position of the nozzle body.
  • FIG. 1 A conventional vacuum pump, which is called a multi-stage ejector, is shown in FIG. 1 .
  • the vacuum pump 100 includes chambers 101 , 102 , and 103 which are arranged in series, and a plurality of nozzles 105 , 106 , and 107 which are installed through partition walls between the chambers 101 , 102 , and 103 .
  • the chambers 101 , 102 , and 103 communicate with a common vacuum chamber 104 through holes 108 , 109 , and 110 .
  • the vacuum pump 100 is connected to external equipment (e.g. suction equipment) through a port 111 which is formed at a predetermined position in the vacuum chamber 104 .
  • external equipment e.g. suction equipment
  • the conventional vacuum pump 100 is problematic in that it is impossible to directly install it in various equipment requiring that air be expelled, and it is difficult to disassemble or assemble the pump for repair or maintenance.
  • the vacuum pump 200 includes a plurality of nozzles 202 , 203 , 204 , and 205 and valve members 210 .
  • the nozzles 202 , 203 , 204 , and 205 are assembled in series, with slots 207 , 208 , and 209 provided between the nozzles.
  • the valve members 210 are located between the nozzles 202 , 203 , 204 , and 205 , and serve to open and close communication holes 206 which are formed in walls of the nozzles 202 , 203 , 204 , and 205 .
  • Coupling means are provided on the nozzles 202 , 203 , 204 , and 205 to couple the nozzles 202 , 203 , 204 , and 205 to an integrated, rotationally symmetrical nozzle body 201 .
  • the vacuum pump 200 is directly accommodated in a housing H of another piece of equipment, and is operated by high-speed compressed air which sequentially passes through the nozzles 202 , 203 , 204 , and 205 , thus creating negative pressure in an internal space S of the housing H.
  • the conventional vacuum pump 200 is problematic in that joints between the nozzles 202 , 203 , 204 , and 205 are prone to break or be deformed (bent or distorted) by external pressure or impact when the vacuum pump 200 is in use. Further, when the vacuum pump 200 breaks down, all components of the pump must be disassembled to check the vacuum pump 200 .
  • the present invention is intended to solve the problems of the vacuum pump 200 disclosed in the above-mentioned patent.
  • the present invention provides a vacuum ejector pump which has characteristics disclosed in the first claim.
  • the preferred embodiment of this invention covers elements disclosed in the dependent claims.
  • the vacuum ejector pump of the present invention is equal to the above-mentioned conventional vacuum pump 200 in that the pump may be directly installed in various equipment requiring that air be expelled.
  • the vacuum ejector pump of this invention is more advantageous than the conventional vacuum pump in that components are safely protected by a nozzle body, and components including mounting nozzles or valve members can be observed through an opening or a cover with the naked eyes, thus enabling rapid and precise check and treatment of malfunctions of the pump.
  • FIG. 1 is a sectional view of a conventional vacuum ejector pump
  • FIG. 2 is a sectional view of another conventional vacuum ejector pump
  • FIG. 3 is a perspective view of a vacuum ejector pump, according to an embodiment of the present invention.
  • FIG. 4 is an exploded perspective view of the vacuum ejector pump of FIG. 3 ;
  • FIG. 5 is a vertical sectional view of the vacuum ejector pump of FIG. 3 ;
  • FIG. 6 is a sectional view taken along line A-A of FIG. 5 ;
  • FIG. 7 is a sectional view taken along line B-B of FIG. 5 ;
  • FIG. 8 is a view to show the state where the vacuum ejector pump according to the present invention is accommodated in an additional housing;
  • FIG. 9 is a sectional view taken along line C-C of FIG. 8 , and illustrating the state in which a surrounding space is evacuated.
  • a vacuum ejector pump As shown in FIGS. 3 through 9 , a vacuum ejector pump, according to this invention, is denoted by reference numeral 1 .
  • the vacuum ejector pump 1 includes a cylindrical nozzle body 2 , a cover 10 , and fastening means 13 and 14 .
  • An opening 3 is provided at a predetermined position in the nozzle body 2 .
  • the cover 10 is provided to cover the opening 3 of the nozzle body 2 .
  • the fastening means 13 and 14 serve to fasten the nozzle body 2 to the cover 10 .
  • One or more mounting nozzles 4 and 5 are provided in the nozzle body 2 , and are visible through the opening 3 .
  • the mounting nozzles 4 and 5 are arranged to be coaxial with the nozzle body 2 , and are installed through partition walls 6 and 7 which are provided in the nozzle body 2 in such a way as to be integrated with the nozzle body 2 , as shown in the drawings.
  • the mounting nozzles 4 and 5 may comprise a plurality of nozzles such that the vacuum ejector pump 1 has desired efficiency characteristics. In this case, the mounting nozzles 4 and 5 are arranged in series, and are spaced apart from each other.
  • a plurality of holes 8 is formed in the wall of the nozzle body 2 .
  • the holes 8 allow the vacuum ejector pump 1 to communicate with a space S surrounding the vacuum ejector pump 1 (see, FIG. 8 ).
  • the holes 8 may be formed on the wall of the cover 10 .
  • Each valve member 9 is a flat valve, and closes an associated hole 8 , when the surrounding space S reaches a pressure which is lower than the internal pressure of the vacuum ejector pump 1 , thus preventing a stream of compressed air from passing through an air channel into the surrounding space S.
  • Each valve member 9 may be made of a flexible material, such as natural rubber, synthetic rubber, or urethane rubber. Meanwhile, if a great number of valve members 9 is required, it takes a longer time to assemble and disassemble the pump. Thus, it is preferable that the valve members 9 be integrated with a gasket 11 .
  • the gasket 11 is provided to seal a junction of the nozzle body 2 and the cover 10 , thus preventing an undesirable stream of air at the contacting portion.
  • the gasket 11 has bent wing pieces 12 which extend vertically. The wing pieces 12 contact the outer surface of the nozzle body 2 , and function to prevent the gasket 11 from being undesirably moved.
  • the cover 10 is provided to cover the opening 3 of the nozzle body 2 .
  • the cover 10 and the nozzle body 2 are fastened to each other, the combination thereof has a circular cross-section (see, FIGS. 6 and 7 ).
  • the cover 10 is preferably manufactured using a transparent material.
  • the fastening means 13 and 14 comprise two O-rings. The O-rings 13 and 14 are fitted to surround contacting portions of opposing ends 10 a and 10 b of the cover 10 and the surface of the nozzle body 2 .
  • An injection unit 15 having an air injection hole 15 a is mounted to an air inlet port 2 a of the nozzle body 2 , and a silencer 16 for preventing noise is mounted to an air outlet port 2 b of the nozzle body.
  • a cylindrical filter 17 has a cross-section whose diameter is larger than that of the nozzle body 2 .
  • the filter 17 is arranged to be coaxial with the nozzle body 2 while receiving the nozzle body 2 therein. Referring to the drawings, opposite ends of the filter 17 are supported by a step 13 a of the O-ring 13 which is provided around the air inlet port 2 a, and a step 16 a of the silencer 16 which is provided around the air outlet port 2 b.
  • the means or method of supporting the filter 17 may be otherwise designed.
  • the vacuum ejector pump 1 according to this invention accommodated in the housing H is shown in FIG. 8 .
  • the vacuum ejector pump 1 passes through the surrounding space S, and is held by both walls of the housing.
  • the surrounding space S may communicate with the vacuum ejector pump 1 through the holes 8 .
  • Air fed into the nozzle body 2 through the air injection hole 15 a passes through the mounting nozzles 4 and 5 at high velocity, and is discharged to the outside through the air outlet port 2 b of the nozzle body 2 .
  • air in the surrounding space S flows through the open holes 8 into the vacuum ejector pump 1 , prior to being discharged along with compressed air (see, FIG. 9 ). Due to such exhausting action, the pressure of the surrounding space S starts dropping. Thereby, when the pressure of the surrounding space S is lower than the internal pressure of the vacuum ejector pump 1 , all of the holes 8 are closed by the valve members 9 . Thus, the surrounding space S maintains the pressure level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US11/658,382 2004-07-28 2007-01-23 Vacuum ejector pumps Abandoned US20070148009A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040059067A KR100578540B1 (ko) 2004-07-28 2004-07-28 진공 이젝터 펌프
KR10-2004-0059067 2004-07-28

Publications (1)

Publication Number Publication Date
US20070148009A1 true US20070148009A1 (en) 2007-06-28

Family

ID=35786464

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/658,382 Abandoned US20070148009A1 (en) 2004-07-28 2007-01-23 Vacuum ejector pumps

Country Status (5)

Country Link
US (1) US20070148009A1 (fr)
KR (1) KR100578540B1 (fr)
CN (1) CN100451351C (fr)
DE (1) DE112005001806B4 (fr)
WO (1) WO2006011760A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080292476A1 (en) * 2005-12-30 2008-11-27 Ho-Young Cho Vacuum Ejector Pumps
US20130291966A1 (en) * 2011-01-03 2013-11-07 Korea Pneumatic System Co., Ltd. Quick-release vacuum pump
US20140050595A1 (en) * 2011-03-10 2014-02-20 Korea Pneumatic System Co., Ltd. Quick-release vacuum pump
US20170037874A1 (en) * 2014-04-24 2017-02-09 Vmeca Co., Ltd. Ejector assembly and vacuum pump
US9863443B2 (en) 2013-07-16 2018-01-09 J. Schmalz Gmbh Multistage ejector
US20180122683A1 (en) * 2016-09-30 2018-05-03 Xiamen Sanan Optoelectronics Technology Co., Ltd. Transfer Head for Transferring Micro Element and Transferring Method of Micro Element
US20220379495A1 (en) * 2021-06-01 2022-12-01 J.Schmalz Gmbh Valve device for a vacuum handling device or a vacuum clamping device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100624563B1 (ko) * 2004-11-18 2006-09-18 오토르 주식회사 이젝터 펌프
KR100730323B1 (ko) * 2007-03-15 2007-06-19 한국뉴매틱(주) 필터 카트리지를 이용한 진공 시스템
DE202009019074U1 (de) 2009-11-24 2016-05-23 J. Schmalz Gmbh Druckluftbetriebener Unterdruckerzeuger
KR200460087Y1 (ko) * 2010-04-14 2012-05-02 킴스엔지니어링 주식회사 에어 이젝터
KR200460086Y1 (ko) * 2010-04-15 2012-05-02 킴스엔지니어링 주식회사 에어 이젝터
KR101157542B1 (ko) * 2012-04-26 2012-06-22 한국뉴매틱(주) 인-라인 진공펌프
CN106089636B (zh) * 2016-08-17 2019-03-26 魏学惠 空压驱动式真空泵
CN106212648A (zh) * 2016-08-30 2016-12-14 苏州贝特贝斯能源技术有限公司 车载微真空果蔬采摘现场冷却装置及其预冷方法
KR101699721B1 (ko) * 2016-09-01 2017-02-13 (주)브이텍 진공 펌프 및 그 어레이
CN108317108A (zh) * 2018-04-12 2018-07-24 微可为（厦门）真空科技有限公司 一种超音速真空管

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137240A (en) * 1961-07-17 1964-06-16 Russell G Hunt Pumps
US3959864A (en) * 1973-12-05 1976-06-01 Aktiebolaget Piab Method for producing an ejector device
US4960364A (en) * 1988-06-08 1990-10-02 Peter Tell Vacuum ejector device
US5205717A (en) * 1991-10-31 1993-04-27 Piab Ab Ejector array and a method of achieving it
US6171068B1 (en) * 1998-08-13 2001-01-09 Dan Greenberg Vacuum pump
US6394760B1 (en) * 1998-03-20 2002-05-28 Piab Ab Vacuum ejector pump
US6561769B1 (en) * 1999-02-26 2003-05-13 Piab Ab Filter and muffler for a vacuum pump
US6619927B1 (en) * 1999-11-26 2003-09-16 Siemens Ag Ejector pump
US6779985B2 (en) * 2001-10-15 2004-08-24 Korea Pneumatic System Co., Ltd. Vacuum generating device

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JPH0353039Y2 (fr) * 1987-05-30 1991-11-19
JP3332391B2 (ja) * 1991-06-28 2002-10-07 エスエムシー株式会社 真空供給装置
JPH04194400A (ja) * 1990-11-27 1992-07-14 Smc Corp 真空発生ユニット
US5683227A (en) * 1993-03-31 1997-11-04 Smc Corporation Multistage ejector assembly
KR19980074701A (ko) * 1997-03-26 1998-11-05 윤종용 반도체 제조용 모터펌프
KR19990039684A (ko) * 1997-11-13 1999-06-05 윤종용 투명커버가 취부된 파워단자를 갖는 진공펌프
KR100345386B1 (ko) * 2000-01-19 2002-07-24 태크뱅크 주식회사 챔버의 개폐장치를 포함하는 진공챔버장치
US6877571B2 (en) * 2001-09-04 2005-04-12 Sunstone Corporation Down hole drilling assembly with independent jet pump
KR20020003166A (ko) * 2001-11-24 2002-01-10 장명수 목초액(스모크향)을 이용한 건강보조식품의 제조방법.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137240A (en) * 1961-07-17 1964-06-16 Russell G Hunt Pumps
US3959864A (en) * 1973-12-05 1976-06-01 Aktiebolaget Piab Method for producing an ejector device
US4960364A (en) * 1988-06-08 1990-10-02 Peter Tell Vacuum ejector device
US5205717A (en) * 1991-10-31 1993-04-27 Piab Ab Ejector array and a method of achieving it
US6394760B1 (en) * 1998-03-20 2002-05-28 Piab Ab Vacuum ejector pump
US6171068B1 (en) * 1998-08-13 2001-01-09 Dan Greenberg Vacuum pump
US6561769B1 (en) * 1999-02-26 2003-05-13 Piab Ab Filter and muffler for a vacuum pump
US6619927B1 (en) * 1999-11-26 2003-09-16 Siemens Ag Ejector pump
US6779985B2 (en) * 2001-10-15 2004-08-24 Korea Pneumatic System Co., Ltd. Vacuum generating device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080292476A1 (en) * 2005-12-30 2008-11-27 Ho-Young Cho Vacuum Ejector Pumps
US8231358B2 (en) * 2005-12-30 2012-07-31 Korea Pneumatic System Co., Ltd. Vacuum ejector pumps
US20130291966A1 (en) * 2011-01-03 2013-11-07 Korea Pneumatic System Co., Ltd. Quick-release vacuum pump
US20140050595A1 (en) * 2011-03-10 2014-02-20 Korea Pneumatic System Co., Ltd. Quick-release vacuum pump
US9764479B2 (en) * 2011-03-10 2017-09-19 Korea Pneumatic System Co., Ltd. Quick-release vacuum pump
US9863443B2 (en) 2013-07-16 2018-01-09 J. Schmalz Gmbh Multistage ejector
US20170037874A1 (en) * 2014-04-24 2017-02-09 Vmeca Co., Ltd. Ejector assembly and vacuum pump
US10400796B2 (en) * 2014-04-24 2019-09-03 Vmeca Co., Ltd. Ejector assembly and vacuum pump
US20180122683A1 (en) * 2016-09-30 2018-05-03 Xiamen Sanan Optoelectronics Technology Co., Ltd. Transfer Head for Transferring Micro Element and Transferring Method of Micro Element
US10643879B2 (en) * 2016-09-30 2020-05-05 Xiamen Sanan Optoelectronics Technology Co., Ltd. Transfer head for transferring micro element and transferring method of micro element
US20220379495A1 (en) * 2021-06-01 2022-12-01 J.Schmalz Gmbh Valve device for a vacuum handling device or a vacuum clamping device
US11969886B2 (en) * 2021-06-01 2024-04-30 J.Schmalz Gmbh Valve device for a vacuum handling device or a vacuum clamping device

Also Published As

Publication number Publication date
CN100451351C (zh) 2009-01-14
WO2006011760A1 (fr) 2006-02-02
CN101002027A (zh) 2007-07-18
DE112005001806B4 (de) 2012-06-21
KR20040072573A (ko) 2004-08-18
KR100578540B1 (ko) 2006-05-15
DE112005001806T5 (de) 2007-07-12

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