US20040033151A1 - Compressor having oil returning apparatus - Google Patents

Compressor having oil returning apparatus Download PDF

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Publication number
US20040033151A1
US20040033151A1 US10/381,102 US38110203A US2004033151A1 US 20040033151 A1 US20040033151 A1 US 20040033151A1 US 38110203 A US38110203 A US 38110203A US 2004033151 A1 US2004033151 A1 US 2004033151A1
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United States
Prior art keywords
compressor
discharge
sealed casing
oil returning
oil
Prior art date
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Abandoned
Application number
US10/381,102
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English (en)
Inventor
Jae-Sool Shim
Young-Jong Kim
Byoung-Ha Ahn
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LG Electronics Inc
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LG Electronics Inc
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Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AHN, BYOUNG-HA, KIM, YOUNG-JONG, SHIM, JAE-SOOL
Publication of US20040033151A1 publication Critical patent/US20040033151A1/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
    • 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
    • F04C29/06—Silencing
    • F04C29/068—Silencing the silencing means being arranged inside the pump housing
    • 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
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F04C18/3568—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member with axially movable vanes
    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/026—Lubricant separation
    • 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
    • F04C29/06—Silencing
    • F04C29/065—Noise dampening volumes, e.g. muffler chambers

Definitions

  • the present invention relates to a compressor using a vane, and more particularly, to a compressor having an oil returning apparatus which is capable of lowering oil leakage to outside of the compressor.
  • compressors are for converting mechanical energy into compression energy of compressive fluid, among them a freezing compressor is largely classified into a reciprocating compressor, a scroll compressor, a centrifugal compressor and a ratary compressor, etc.
  • FIG. 1 is a longitudinal sectional view illustrating the conventional Z-compressor.
  • the Z-compressor can be classified as a rotary compressor, and it includes a sealed casing 10 ; a motor part 20 disposed in the sealed casing 10 and generating a rotational force; and a compression part 30 for sucking, compressing and discharging gas by the rotational force of the motor part 20 .
  • a side portion communicates with a suction pipe 12 at which gas is sucked, and a upper portion communicates with a discharge pipe 14 .
  • a internal bottom surface of the sealed casing 10 is filled with a certain amount of oil for lubricating and cooling a sliding portion and a heat generating portion inside the sealed casing 10 .
  • the motor part 20 consists of a stator 22 and a rotor 23 as a general electric motor.
  • the compression part 30 includes a cylinder assembly 31 disposed in the sealed casing 10 and forming a compression space for compressing gas sucked from the outside; a rotational shaft 24 for transmitting a rotational power generated in the rotor 23 of the motor part 20 ; a Z-plate 35 combined with the rotational shaft 24 , rotated together with it and partitioning the compression space into a first space V 1 and a second space V 2 ; and a first vane 38 and a second vane 39 respectively contacted to the upper surface and the bottom surface of the Z-plate 35 and partitioning the first space V 1 and the second space V 2 into a suction region and a compression region.
  • the cylinder assembly 31 includes a cylinder 50 ; and a first bearing plate 40 and a second bearing plate 60 respectively fixed to the upper surface and the bottom surface of the cylinder 50 and forming a compression space with the cylinder 50 .
  • Suction paths 52 , 54 for sucking gas into the first space V 1 and the second space V 2 are respectively formed at the both sides of the cylinder 50 so as to communicate with the suction pipe 12 .
  • the first and the second bearing plates 40 , 60 are disc-shaped having a certain thickness and area, and they respectively include a journal portion 44 , 64 extended from the center so as to have a certain height and outer diameter to receive the rotational shaft 24 rotatably; and a first vane slot 42 and a second vane slot 62 formed at the side of the journal portion 44 , 64 to receive the first and the second vanes 38 , 39 .
  • a discharge path 46 , 66 is respectively formed at the side of the first and the second vane slots 42 , 62 to discharge compressed gas from the compression space.
  • a first discharge muffler 70 and a second. discharge muffler 80 covered the first and the second bearing plates 40 , 60 respectively.
  • first and the second discharge mufflers 70 , 80 in order to engage with the outer circumference of the first and the second bearing plates 40 , 60 in the circumference direction, they respectively have an inner diameter corresponded to the outer diameter of the first and the second bearing plates 40 , 60 , and fixation holes 74 , 84 are formed at the central portion so as to have an inner diameter corresponded to the outer diameter of the journal portions 44 , 64 of the first and the second bearing plates 40 , 60 .
  • a side of the first and the second discharge mufflers 70 , 80 is tightly contacted to the outer circumference of the journal portions 44 , 64 of the first and the second bearing plates 40 , 60 respectively, and the other side of the first and the second discharge mufflers 70 , 80 is tightly contacted to the outer circumference of the first and the second bearing plates 40 , 60 respectively.
  • outlets 72 , 82 for discharging gas are respectively formed at a certain side of the first and the second discharge mufflers 70 , 80 .
  • the rotational shaft 24 has a certain outer diameter and a certain length, and it consists of a shaft portion 25 inserted into the journal portions 42 , 62 of the first and the second bearing plates 40 , 60 and a hub portion 26 circumferentially formed at the shaft portion 25 and combined with the Z-plate 35 .
  • the rotational shaft 24 includes an oil path 27 penetrating the shaft portion 25 and an oil feeder 28 formed at the lower end of the oil path 27 to supply oil contained in the sealed casing 10 upwardly.
  • the Z-plate 35 has a disc shape to make the outer circumference of the Z-plate 35 slide-contact with the inner circumference of the cylinder 50 in the view of plane projection and formed as a sinuous cam surface having the same thickness from the inner circumference to the outer circumference in the view of side projection. Therefore, a surface of a top dead center is contacted to the bottom surface of the first bearing plate 40 and is rotated, and a surface of a bottom dead center is tightly contacted to the upper surface of the second bearing plate 60 and is rotated.
  • the first and the second vanes 38 , 39 have a square plate shape and tightly contact to the sinuous cam surface of the Z plate 35 in the compression spaces V 1 , V 2 of the cylinder assembly 31 .
  • the first and the second vanes 38 , 39 respectively divide the compression spaces V 1 , V 2 into a suction region and a compression region while performing a reciprocating motion up and down according to high and low of the cam surface of the Z-plate 35 .
  • first and the second vanes 38 , 39 are elastically supported by the elastic supporting member 90 installed at the first and the second bearing plates 40 , 60 respectively.
  • the first space V 1 placed at the upper portion of the Z-plate 35 is divided into the suction region and the compression region on the basis of the top dead center of the Z-plate 35 and the first vane 38
  • the second space V 2 placed at the lower portion of the Z-plate 35 is divided into the suction region and the compression region on the basis of the bottom dead center of the Z-plate 35 and the second vane 39 .
  • the top dead center and the bottom dead center of the Z-plate 35 are moved, and accordingly a volume of the suction region and the compression region of each space is varied.
  • first and the second vanes 38 , 39 reciprocate oppositely with each other about the cam surface height of the Z-plate 35 .
  • the oil is discharged to outside of the sealed casing together with compressed gas discharged from the compression part, because the discharged oil remains behind on the lower portion or a bend portion, etc. of 5 a pipe due to dropping pressure of gas while passing a cycle system, oil inside the sealed casing is gradually reduced. Accordingly, life-span of parts may be reduced due to dry abrasion on sliding parts by shortage of oil inside the sealed casing, and a performance of the compressor may be lowered due to increase of friction at sliding parts.
  • a compressor including a sealed casing respectively communicating with a suction pipe and a discharge pipe; a cylinder assembly disposed in the sealed casing and having a suction path and a discharge path; a Z-plate partitioning the internal space of the cylinder assembly into plural compression spaces and sucking, compressing and discharging gas while being rotated by a motor part; a vane contacted to the both surfaces of the Z-plate and partitioning each compression space into a suction region and a compression region while performing a reciprocating motion; and a discharge muffler covered the both sides of the cylinder assembly and lowering noise of discharged gas
  • a compressor includes at least one oil returning member installed on a discharge route between a discharge path of a cylinder assembly and a discharge pipe of a sealed casing in order to filter oil flowing with gas.
  • FIG. 1 is a longitudinal sectional view illustrating the conventional Z-compressor
  • FIG. 2 is a longitudinal sectional view illustrating a Z-compressor having an oil returning apparatus in accordance with a first embodiment of the present invention
  • FIG. 3 is a partial sectional view illustrating part of an upper portion of a Z-compressor having an oil returning apparatus in accordance with a second embodiment of the present invention
  • FIG. 4 is a longitudinal sectional view illustrating major part of a Z-compressor having an oil returning apparatus in accordance with a third embodiment of the present invention.
  • FIG. 5 is a longitudinal sectional view illustrating major part of a Z-compressor having an oil returning apparatus in accordance with a fourth embodiment of the present invention.
  • FIG. 2 is a longitudinal sectional view illustrating the Z-compressor in accordance with the first embodiment of the present invention.
  • the Z-compressor in accordance with the first embodiment of the present invention includes a sealed casing 110 ; a motor part 120 disposed in the sealed casing 110 and generating a rotational force; and a compression part 130 for sucking, compressing and discharging gas by the rotational force generated in the motor part 120 .
  • the side surface of the sealed casing 110 communicates with a suction pipe 112 for sucking gas, the upper portion of the sealed casing 110 communicates with a discharge pipe 114 for discharging compressed gas; and the bottom surface of the sealed casing 110 is filled with oil for lubricating sliding portions and cooling a heat generating portion of the sealed casing 110 .
  • the motor part 120 consists of a stator 122 and a rotor 123 as a general electric motor.
  • the compression part 130 includes a cylinder assembly 131 installed inside the sealed casing 110 and forming a compression space at which gas sucked from the outside is compressed; a rotational shaft 124 for transmitting a rotational force generated in the rotor 123 of the motor part 120 ; a Z-plate 135 rotatably combined with the rotational shaft 124 and partitioning the compression space of the cylinder assembly 131 into a first space V 1 and a second space V 2 ; a first and a second vanes 138 , 139 respectively contacted to the upper surface and the lower surface of the Z-plate 135 and partitioning each space V 1 , V 2 into a suction region and a compression region when the Z-plate 135 is rotated; and a first and a second discharge mufflers 170 , 180 respectively covered the both sides of the cylinder assembly 131 and lowering noise of compression gas propagated from the discharge path of the cylinder assembly 131 .
  • the Z-compressor in accordance with the present invention has the same/similar construction with/to the conventional Z-compressor.
  • an oil returning member 200 is installed at a portion abutting on the discharge pipe 114 in order to filter oil flowing together with discharge gas.
  • the oil returning member 200 has a screen shape having a certain mesh and a thickness, and the outer circumference of the oil returning member 200 is tightly contacted to the inner circumference of the sealed casing 110 by a welding method, etc.
  • the oil returning member 200 can be fixed to the sealed casing 110 by using an additional supporting member.
  • the oil returning member 200 it is preferable for the oil returning member 200 to have a size corresponded to the inner circumference of the sealed casing 110 so as to be tightly contacted to the inner circumference of the sealed casing 110 .
  • the first space V 1 placed at the upper portion of the Z-plate 135 is divided into the suction region and the compression region on the basis of the top dead center of the Z-plate 135 and the first vane 138
  • the second space V 2 placed at the lower portion of the Z-plate 135 is divided into the suction region and the compression region on the basis of the bottom dead center of the Z-plate 135 and the second vane 139 .
  • the top dead center and the bottom dead center of the Z-plate 35 are moved, and accordingly a volume of the suction region and the compression region is varied.
  • first and the second vanes 138 , 139 reciprocate oppositely with each other about the cam surface of the Z-plate 135 .
  • the compression gas discharged through the discharge paths 146 , 166 of the cylinder assembly 131 is moved toward the discharge pipe 114 with oil, however, although the compressed gas passes the screen-shaped oil returning member 200 formed at the inlet of the discharge pipe 114 and is discharged to outside of the sealed casing 110 through the discharge pipe 114 , the oil is filtered by the oil returning member 200 and is returned to the sealed casing 110 . And, the returned oil lubricates the sliding parts of the sealed casing 110 .
  • a compressor having an oil returning apparatus in accordance with a second embodiment of the present invention will be described with reference to accompanying FIG. 3.
  • the same parts with the parts of the Z-compressor in accordance with the first embodiment will have the same reference numerals, and detailed description will be abridged.
  • FIG. 3 is a partial-longitudinal sectional view illustrating a discharge pipe of the Z-compressor in accordance with the second embodiment of the present invention.
  • an oil returning member 210 is inserted into and fixed at the inlet side of the discharge pipe 114 formed at the upper end of the sealed casing 110 so as to communicate with the casing 110 .
  • the oil returning member 210 has a diameter corresponded to the inner diameter of the discharge pipe 114 , is tightly inserted into the discharge pipe 114 by a welding or a press-fitting method, etc. and has a screen shape so as to pass discharged compression gas and filter oil flowing with the compression gas.
  • the Z-compressor in accordance with the second embodiment of the present invention by fixedly inserting the screen-shaped oil returning member into the discharge pipe, it is possible to prevent dry abrasion due to shortage of oil at a sliding portion inside the sealed casing by returning oil flowing with compression gas into the sealed casing.
  • the oil returning member can be easily fabricated and fixed, and because it has a simple structure, a production cost can be reduced.
  • a Z-compressor having an oil returning apparatus in accordance with a third embodiment of the present invention will be described with reference to accompanying FIG. 4.
  • the same parts with the parts of the Z-compressor in accordance with the first and second embodiments will have the same reference numerals, and detailed description will be abridged.
  • FIG. 4 is a longitudinal sectional view illustrating major parts of the Z-compressor in accordance with the third embodiment of the present invention.
  • an oil returning member 220 is fixed between discharge paths 146 , 166 respectively formed at the first and the second bearing plates 140 , 160 and outlets 1 72 , 1 82 of the first and the second discharge mufflers 170 , 180 .
  • the oil returning member 220 has a screen shape having a certain mesh to filter oil flowing with discharge gas.
  • the oil returning member 220 has a disc shape.
  • the exterior of the oil returning member 220 is tightly contacted to the inner circumference of the first and the second discharge mufflers 170 , 180 respectively covering the upper and the lower portions of the cylinder assembly 131 to lower noise of discharged gas by a welding method, etc., and the interior of the oil returning member 220 is tightly contacted to the outer circumference of the journal portions 144 , 164 of the first and the second bearing plates 240 , 260 .
  • the compression gas discharged from the discharge path 146 , 166 of the cylinder assembly 131 passes the oil returning member 220 and is charged through the outlets 172 , 182 of the discharge mufflers 170 , 180 , on the contrary, oil inside the discharge mufflers 170 , 180 is filtered by the oil returning member 220 .
  • oil filtered by the oil returning member 220 is returned into the discharge mufflers 170 , 180 and lubricates sliding portions of the vanes 138 , 139 and the vane slots 142 , 162 , etc.
  • a Z-compressor having an oil returning apparatus in accordance with a fourth embodiment of the present invention will be described with reference to accompanying FIG. 5.
  • the same parts with the parts of the Z-compressor in accordance with the first, second and third embodiments will have the same reference numerals, and detailed description will be abridged.
  • FIG. 5 is a longitudinal sectional view illustrating major parts of the Z-compressor in accordance with the fourth embodiment of the present invention.
  • an oil returning member 230 is inserted into the outlet 172 of the first and the second discharge mufflers 170 , 180 .
  • the oil returning member 230 is formed as a screen shape having a certain mesh so as to filter oil flowing with discharged gas.
  • the compressed gas discharged from a discharge path 146 , 166 of the cylinder assembly 131 is discharged through the oil returning member 230 inserted into the outlets 172 , 182 of the discharge mufflers 170 , 180 , on the contrary, oil is filtered by the oil returning member 230 , is returned into the discharge mufflers 1 70 , 1 80 and lubricates sliding portions of the vanes 138 , 139 and the vane slots 142 , 162 , etc.
  • a Z-compressor in accordance with the present invention, by installing an oil returning member having a screen shape at a discharge route between a discharge path of a cylinder assembly and a discharge pipe of a sealed casing, oil flowing with discharged compression gas can be returned, and accordingly dry abrasion due to shortage of oil at sliding portions inside the sealed casing can be prevented.
  • the oil returning member in accordance with the present invention can be applied to a reciprocating compressor, a scroll compressor, a centrifugal compressor and a rotation compressor, etc. as well as a Z-compressor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
US10/381,102 2001-11-20 2002-11-14 Compressor having oil returning apparatus Abandoned US20040033151A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2001-0072410A KR100434399B1 (ko) 2001-11-20 2001-11-20 밀폐형 압축기의 유토출 저감 장치
KR2001-72410 2001-11-20
PCT/KR2002/002131 WO2003044367A1 (en) 2001-11-20 2002-11-14 Compressor having oil returning apparatus

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US20040033151A1 true US20040033151A1 (en) 2004-02-19

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US10/381,102 Abandoned US20040033151A1 (en) 2001-11-20 2002-11-14 Compressor having oil returning apparatus

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US (1) US20040033151A1 (pt)
JP (1) JP2005509797A (pt)
KR (1) KR100434399B1 (pt)
AU (1) AU2002353606A1 (pt)
BR (1) BR0206548B1 (pt)
WO (1) WO2003044367A1 (pt)

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CN102094791A (zh) * 2011-03-04 2011-06-15 梁嘉麟 运行时不存在泄漏气体分子的气泵装置结构形式
CN102454613A (zh) * 2010-10-26 2012-05-16 珠海格力节能环保制冷技术研究中心有限公司 旋转压缩机排气管油帽及其安装方法
CN102654120A (zh) * 2011-03-04 2012-09-05 梁嘉麟 能够杜绝运行时漏气的简易型气泵结构
CN102691641A (zh) * 2011-03-21 2012-09-26 梁嘉麟 运行时能够减少或杜绝漏气的气泵结构改进方案
CN102691642A (zh) * 2011-03-21 2012-09-26 梁嘉麟 运行时能够减少或杜绝漏气的气泵装置改进方案
CN103511278A (zh) * 2013-07-15 2014-01-15 广东美芝精密制造有限公司 旋转式压缩机
CN103511279A (zh) * 2013-08-01 2014-01-15 广东美芝制冷设备有限公司 旋转式压缩机及具有该旋转式压缩机的制冷设备
CN103615372A (zh) * 2013-11-18 2014-03-05 广东美芝制冷设备有限公司 压缩机
US20220034324A1 (en) * 2018-09-05 2022-02-03 Lg Electronics Inc. Compressor

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JP2006283592A (ja) * 2005-03-31 2006-10-19 Daikin Ind Ltd 流体機械
KR101235190B1 (ko) * 2006-11-20 2013-02-20 삼성전자주식회사 밀폐형 압축기
CN101881278B (zh) * 2009-05-05 2015-01-07 上海日立电器有限公司 一种降低压缩机油循环率的消音器
CN102654122B (zh) * 2011-03-04 2016-04-06 中国计量学院 能够减少或杜绝运行时漏气的气泵结构装置
CN102654296B (zh) * 2011-03-04 2014-12-03 中国计量学院 无水输能型超高层建筑制热空调系统
CN106194655B (zh) * 2011-03-04 2019-05-03 中国计量大学 运行时能够减少漏气的气泵结构
CN102094790B (zh) * 2011-03-04 2013-02-27 中国计量学院 运行时不存在泄漏气体分子的气泵结构形式
CN102192130B (zh) * 2011-03-21 2012-12-26 中国计量学院 运行时能够杜绝泄漏气体分子的气泵结构改进方法
CN102192131B (zh) * 2011-03-21 2012-12-26 中国计量学院 运行时能够杜绝泄漏气体分子的气泵装置改进方法
KR102206177B1 (ko) * 2014-07-01 2021-01-22 엘지전자 주식회사 압축기 및 압축기의 조립 방법
CN106224241B (zh) * 2016-09-09 2019-01-04 珠海凌达压缩机有限公司 回油骨架及具有其的压缩机

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CN102454613A (zh) * 2010-10-26 2012-05-16 珠海格力节能环保制冷技术研究中心有限公司 旋转压缩机排气管油帽及其安装方法
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JP2005509797A (ja) 2005-04-14
AU2002353606A1 (en) 2003-06-10
BR0206548A (pt) 2004-06-22
KR20030041576A (ko) 2003-05-27
WO2003044367A1 (en) 2003-05-30
BR0206548B1 (pt) 2010-12-28

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