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US20040047750A1 - Reciprocating compressor - Google Patents

Reciprocating compressor Download PDF

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Publication number
US20040047750A1
US20040047750A1 US10/634,765 US63476503A US2004047750A1 US 20040047750 A1 US20040047750 A1 US 20040047750A1 US 63476503 A US63476503 A US 63476503A US 2004047750 A1 US2004047750 A1 US 2004047750A1
Authority
US
United States
Prior art keywords
piston
suction
suction valve
compressor
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/634,765
Other languages
English (en)
Inventor
Byung-Jik Kim
Hyeong-Seok Kim
Dong-Han Kim
Jin-Sung Park
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 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: KIM, BYUNG-JIK, KIM, DONG-HAN, KIM, HYEONG-SEOK, PARK, JIN-SUNG
Publication of US20040047750A1 publication Critical patent/US20040047750A1/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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston

Definitions

  • the present invention relates to a reciprocating compressor, and particularly, to a reciprocating compressor which is configured to smoothly operate a suction valve by reducing a contact area between a piston and the suction valve.
  • a compressor is an apparatus for compressing refrigerant gas under the condition of low temperature and pressure, which is introduced from an evaporator and discharging the gas by changing the condition to high temperature and pressure.
  • the compressor can be classified as a rotary compressor, reciprocating compressor and a scroll compressor according to the method of compressing fluid.
  • the reciprocating compressor sucks and compresses fluid while a piston moves linearly.
  • a method of compressing in such a reciprocating compressor is divided into a method which compresses fluid by converting the rotary movement of a driving motor into a reciprocating movement of the piston, and a method which compresses and sucks fluid by having the piston perform a reciprocating movement as the driving motor performs a linear reciprocating movement.
  • FIG. 1 is a longitudinal sectional view showing a conventional reciprocating compressor
  • FIG. 2 is a partially cross-sectional view showing an engagement of a piston and a suction valve in FIG. 1
  • FIG. 3 is a partially longitudinal cross-sectional view showing a compression operation in FIG. 1.
  • the conventional reciprocating compressor includes a case 10 having a gas suction pipe SP and gas discharging pipe DP, and a frame unit 20 which is elastically installed inside the case 10 .
  • a reciprocating motor 30 is fixed to the frame 20 and has having a movable element which reciprocates linearly, a compression unit 40 is engaged to the movable element 33 of the reciprocating motor 30 and is supported by the frame unit 20 .
  • a resonance spring unit 50 for inducing resonating movement by elastically supporting the movable element of the reciprocating motor 30 in the movement direction is provided.
  • the compression unit 40 includes a cylinder 41 which is integrally formed in a front frame 21 of the frame unit 20 , a piston 42 which is attached to the movable element of the reciprocating motor 30 for performing a reciprocating movement in a compression space P of the cylinder 41 , a suction valve 43 which is mounted at the front end of the piston 42 for controlling suction of gas by opening and closing the suction path F of the piston 42 , and a discharging valve assembly 70 which is mounted at the discharge side of the cylinder 41 for controlling discharge of gas by opening and closing the compression space P.
  • the discharging valve assembly 70 includes a discharge cover 71 for covering a side of the cylinder 41 , and a discharge valve 72 which is located at the inner portion of the discharging cover 71 for elastically opening and closing the compression space P.
  • the suction valve 43 (FIG. 2) is formed as a circular thin plate and provided with a cutting groove 43 a at the center thereof.
  • the suction valve 43 is divided into a fixed portion 43 b and an open/close portion 43 c by the cutting groove 43 a.
  • the suction valve 43 is fixed to an end portion surface 46 of the piston by a bolt B to be in contact therewith.
  • the piston 42 reciprocates in the cylinder 41 by a driving force of the reciprocating motor 30 and changes a volume of the compression space P, thereby sucking and compressing gas into the compression space P.
  • an object of the present invention is to provide a reciprocating compressor which is configured to smoothly operate a suction valve by weakening adhesive force of oil by reducing a contact area between an end portion surface of a piston and a suction valve, and to reduce noise by a damping operation.
  • a reciprocating compressor comprising: a piston which reciprocates in a compression space of a cylinder by being engaged with a reciprocating motor and has a suction path connected to the compression space therein; a suction valve mounted at an end surface of the piston to control gas suction by opening and closing the suction path of the piston; a discharging valve assembly mounted at a discharge side of the cylinder to control gas discharge by opening and closing the compression space; and an adhesion preventing unit formed at a contact portion between the end portion surface of the piston and the suction valve to minimize adhesion due to oil by reducing a contact area between the piston and the suction valve.
  • FIG. 1 is a longitudinal sectional view showing the conventional reciprocating compressor
  • FIG. 2 is a disassembled perspective view showing an engagement of a piston and a suction valve of the compressor of FIG. 1;
  • FIG. 3 is a longitudinal sectional view showing a suction operation of the compressor of FIG. 1;
  • FIG. 4 is a longitudinal sectional view showing a compression operation of the compressor of FIG. 1;
  • FIG. 5 is a longitudinal sectional view showing a reciprocating compressor according to one preferred embodiment of the present invention.
  • FIG. 6 is a disassembled perspective view showing an engagement of a piston and a suction valve of the compressor of FIG. 5;
  • FIG. 7 is a longitudinal sectional view showing a suction operation of the suction valve of the compressor of FIG. 5;
  • FIG. 8 is a longitudinal sectional view showing a compression operation of the suction valve of the compressor of FIG. 5;
  • FIG. 9 is a frontal view showing an end portion surface of the piston of the compressor of FIG. 5;
  • FIG. 10 is a disassembled perspective view showing an engagement between the piston and the suction valve according to another preferred embodiment of the present invention.
  • FIG. 11 is a longitudinal sectional view showing an engagement between the piston and the suction valve of the compressor of the embodiment of an engagement between the piston and the suction valve of FIG. 10;
  • FIG. 12 is a longitudinal sectional view showing a reciprocating compressor according to still another preferred embodiment of the present invention.
  • FIG. 5 is a longitudinal sectional view showing a reciprocating compressor according to one preferred embodiment of the present invention
  • FIG. 6 is a disassembled perspective view showing an engagement of a piston and a suction valve of FIG. 5
  • FIG. 7 is a longitudinal sectional view showing a suction operation of the piston of FIG. 5
  • FIG. 8 is a longitudinal sectional view showing a compression operation of FIG. 5
  • FIG. 9 is a frontal view showing a piston end surface portion of FIG. 5.
  • the reciprocating compressor includes a case 10 having a gas suction pipe SP and a gas discharging pipe DP, a frame unit 20 which is elastically installed inside the case 10 .
  • a reciprocating motor 30 is fixed to the frame 20 , and has having a movable element (not shown) which linearly reciprocates, a compression unit 140 engaged to the movable element of the reciprocating motor 30 and is supported by the frame unit 20 , and a resonance spring unit 50 for inducing resonating movement by elastically supporting the movable element of the reciprocating compressor 30 in the movement direction are provided.
  • the compression unit 140 includes a cylinder 141 which is integrally formed with the frame unit 20 , and a piston 142 which is secured for movement with the movable element of the reciprocating motor 30 for performing a reciprocating movement in a compression space P of the cylinder 141 .
  • a suction valve 143 is mounted at the front end of the piston 142 for controlling the suction of gas by opening and closing the suction path F of the piston 142
  • a discharging valve assembly 170 is mounted at the discharge side of the cylinder 141 for controlling discharge of gas by opening and closing the compression space P.
  • the piston 142 includes a head portion 145 (FIG. 6) having a predetermined length and which is inserted to an inner portion of the cylinder 141 , an end portion surface 146 of the piston formed at an end portion of one side of the head portion 145 and defining a predetermined space P, and a connecting portion 147 formed with a predetermined area extending perpendicularly to the longitudinal direction and configured to be connected to the movable element of the motor at the side opposite the head portion 145 .
  • the suction path F along which gas flows is formed within the head portion 145 and extends to the end portion surface 146 of the piston.
  • the discharging valve assembly 170 includes a discharge cover 171 for covering a compression space P of the cylinder 141 , and a discharge valve 172 which is located within the discharging cover 171 for elastically opening and closing the compression space P.
  • the suction valve 143 is formed as a circular thin plate and provided with a cutting groove 143 a at the center thereof.
  • the suction valve 143 is divided into a fixed portion 143 b and an open/close portion 143 c by the cutting groove 143 a .
  • the suction valve 143 is fixed to an end portion surface 146 of the piston by a bolt B.
  • the suction valve 143 opens the flow path F by a pressure difference, and in performing operating compression, the suction valve 143 closes the flow path F by the pressure difference.
  • an adhesion preventing unit is formed at a contact portion of the end portion surface 146 of the piston and the suction valve 143 in order to minimize the viscous effect of the oil by reducing the contact area of the surface 146 with the suction valve 143 .
  • the adhesion preventing unit can be formed one side of either the end portion surface 146 of the piston the suction valve 143 .
  • the adhesion preventing unit can also be formed at both sides thereof.
  • an adhesion preventing groove 146 a comprises a dent or depressed area with a predetermined depth at the end portion surface 146 of the piston which serves as the adhesion preventing unit.
  • a depth of the adhesion preventing groove 146 a is determined so as not to influence the viscosity of the oil, which is preferably formed to be about 20-200 ⁇ m.
  • an oil back flow preventing protrusion 146 b (FIGS. 8 and 9) is formed at the end portion of the suction path F located at the end portion surface 146 of the piston so as to prevent back flow of the oil, which has flowed into the adhesion preventing groove 146 a to the suction path F.
  • the oil back flow preventing protrusion 146 b is formed on the same vertical surface as the end portion surface 146 of the piston so as to selectively open and close the suction path F by the suction valve 143 .
  • FIG. 10 is a disassembled perspective view showing an engagement between the piston and the suction valve according to another preferred embodiment of the present invention.
  • FIG. 11 is a longitudinal sectional view showing a reciprocating compressor of FIG. 10.
  • the adhesion preventing groove 156 a comprises a dent or depression with a predetermined depth that is formed at the end portion surface 146 of the piston to prevent adhesion according to another preferred embodiment of the present invention.
  • the adhesion preventing groove 156 a is partially formed at the upper side of the end portion surface of the piston 146 .
  • the reason for the formation of the groove 156 a is in order to provide timely opening of the suction path F by the suction valve 143 at the time of a suction operation and to tightly close the suction path F without gas leakage by the suction valve 143 at the time of a compression operation.
  • a depth of the adhesion preventing groove 156 a is determined within a range which does not influence the viscosity of the oil.
  • the depth is preferably formed to be about 20-200 ⁇ m.
  • an oil back flow preventing protrusion 156 b is formed at the end portion of the suction path F located at the end portion surface 146 of the piston so as not to prevent back flow of the oil which has flowed into the adhesion preventing groove 156 a to the suction path F.
  • the oil back flow preventing protrusion 156 b is formed on the same vertical surface as the end portion surface 146 of the piston so as to selectively open and close the suction path F by the suction valve 143 .
  • FIG. 12 is a longitudinal sectional view showing a reciprocating compressor according to still another preferred embodiment of the present invention.
  • the adhesion preventing groove 166 a is formed in the suction valve 143 in another preferred embodiment of the present invention.
  • a depth of the adhesion preventing groove 166 a is preferably formed to be about 20-200 ⁇ m.
  • the piston 142 reciprocates in the cylinder 141 by a driving force of the reciprocating motor 30 and changes a volume of the compression space P, thereby sucking and compressing gas into the compression space P.
  • the adhesion preventing groove 146 a is formed at the end portion surface 146 of the piston 142 , so that the suction valve 143 has less contact area with the end portion surface 146 of the piston.
  • the suction valve 143 is not influenced by the viscous force of the oil but can open the suction path F in a timely manner.
  • the bent open/close portion of the suction valve 143 returns to the initial state and is damped by the oil in the adhesion preventing groove 146 a . That is, by reducing the contact area of the open/close portion 143 c of the suction valve 143 and the end portion surface 146 of the piston, chattering noise can be reduced.
  • the chattering noise generated by a contact of the piston 142 and the suction valve 143 can be reduced by damping the suction valve 143 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US10/634,765 2002-09-07 2003-08-06 Reciprocating compressor Abandoned US20040047750A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR54054/2002 2002-09-07
KR1020020054054A KR20040022787A (ko) 2002-09-07 2002-09-07 왕복동식 압축기의 가스 흡입장치

Publications (1)

Publication Number Publication Date
US20040047750A1 true US20040047750A1 (en) 2004-03-11

Family

ID=31885004

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/634,765 Abandoned US20040047750A1 (en) 2002-09-07 2003-08-06 Reciprocating compressor

Country Status (6)

Country Link
US (1) US20040047750A1 (zh)
JP (1) JP2004100687A (zh)
KR (1) KR20040022787A (zh)
CN (1) CN1295435C (zh)
BR (1) BR0300317B8 (zh)
DE (1) DE10312355B8 (zh)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050129548A1 (en) * 2003-12-10 2005-06-16 Lg Electronics In. Suction valve and reciprocating compressor having the same
US20070110600A1 (en) * 2005-11-14 2007-05-17 Lg Electronic Inc. Linear Compressor
US20150004017A1 (en) * 2013-06-28 2015-01-01 Lg Electronics Inc. Linear compressor
EP2818713A3 (en) * 2013-06-28 2015-10-28 LG Electronics, Inc. Linear compressor
US9677553B2 (en) 2013-06-28 2017-06-13 Lg Electronics Inc. Linear compressor
US9695810B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9695811B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9714648B2 (en) 2013-06-28 2017-07-25 Lg Electronics Inc. Linear compressor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100539770B1 (ko) 2004-08-16 2006-01-10 엘지전자 주식회사 왕복동식 압축기의 냉매흡입 안내구조
KR101179076B1 (ko) * 2005-05-06 2012-09-03 엘지전자 주식회사 왕복동식 압축기용 피스톤의 소음 저감 구조
JP6580450B2 (ja) * 2015-10-23 2019-09-25 住友重機械工業株式会社 弁構造、無潤滑リニア圧縮機、および極低温冷凍機
CN117231470A (zh) * 2023-11-13 2023-12-15 瑞纳智能设备股份有限公司 压缩机的气体轴承装置及压缩机

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US4580604A (en) * 1983-06-23 1986-04-08 Mitsubishi Denki Kabushiki Kaisha Discharging valve device for a compressor
US5163819A (en) * 1992-02-07 1992-11-17 General Motors Corporation Asymmetrical suction porting for swash plate compressor
US5203686A (en) * 1991-11-04 1993-04-20 General Electric Company Rotary compressor with span type discharge valve
US5380176A (en) * 1992-09-21 1995-01-10 Sanden Corporation Valved discharge mechanism in a refrigerant compressor
US5601118A (en) * 1995-06-03 1997-02-11 Samsung Electronics Co., Ltd. Discharge valve apparatus of compressor
US6089836A (en) * 1998-01-12 2000-07-18 Lg Electronics Inc. Linear compressor
US6247901B1 (en) * 1997-02-17 2001-06-19 Hans Unger Compressor for generating compressed air in motor vehicles

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US5078582A (en) * 1990-01-16 1992-01-07 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Reciprocatory piston type compressor having a noise and vibration suppressed discharge valve mechanism
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JPH062654A (ja) * 1992-06-18 1994-01-11 Nippondenso Co Ltd 圧縮機
JP3301895B2 (ja) * 1995-09-05 2002-07-15 三洋電機株式会社 密閉型圧縮機
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Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580604A (en) * 1983-06-23 1986-04-08 Mitsubishi Denki Kabushiki Kaisha Discharging valve device for a compressor
US5203686A (en) * 1991-11-04 1993-04-20 General Electric Company Rotary compressor with span type discharge valve
US5163819A (en) * 1992-02-07 1992-11-17 General Motors Corporation Asymmetrical suction porting for swash plate compressor
US5380176A (en) * 1992-09-21 1995-01-10 Sanden Corporation Valved discharge mechanism in a refrigerant compressor
US5601118A (en) * 1995-06-03 1997-02-11 Samsung Electronics Co., Ltd. Discharge valve apparatus of compressor
US6247901B1 (en) * 1997-02-17 2001-06-19 Hans Unger Compressor for generating compressed air in motor vehicles
US6089836A (en) * 1998-01-12 2000-07-18 Lg Electronics Inc. Linear compressor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050129548A1 (en) * 2003-12-10 2005-06-16 Lg Electronics In. Suction valve and reciprocating compressor having the same
US20070110600A1 (en) * 2005-11-14 2007-05-17 Lg Electronic Inc. Linear Compressor
US20150004017A1 (en) * 2013-06-28 2015-01-01 Lg Electronics Inc. Linear compressor
EP2818713A3 (en) * 2013-06-28 2015-10-28 LG Electronics, Inc. Linear compressor
US9677553B2 (en) 2013-06-28 2017-06-13 Lg Electronics Inc. Linear compressor
US9695810B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9695811B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9714648B2 (en) 2013-06-28 2017-07-25 Lg Electronics Inc. Linear compressor
US20170218931A1 (en) * 2013-06-28 2017-08-03 Lg Electronics Inc. Linear compressor
US9726164B2 (en) * 2013-06-28 2017-08-08 Lg Electronics Inc. Linear compressor
US10634127B2 (en) * 2013-06-28 2020-04-28 Lg Electronics Inc. Linear compressor

Also Published As

Publication number Publication date
DE10312355B4 (de) 2011-08-11
DE10312355B8 (de) 2012-03-08
DE10312355A1 (de) 2004-03-18
CN1480648A (zh) 2004-03-10
JP2004100687A (ja) 2004-04-02
BR0300317B1 (pt) 2013-01-08
BR0300317B8 (pt) 2013-02-19
BR0300317A (pt) 2004-09-08
CN1295435C (zh) 2007-01-17
KR20040022787A (ko) 2004-03-18

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AS Assignment

Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, BYUNG-JIK;KIM, HYEONG-SEOK;KIM, DONG-HAN;AND OTHERS;REEL/FRAME:014370/0733

Effective date: 20030714

STCB Information on status: application discontinuation

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