US20050112000A1 - Linear motor and linear compressor having the same - Google Patents

Linear motor and linear compressor having the same Download PDF

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Publication number
US20050112000A1
US20050112000A1 US10/805,671 US80567104A US2005112000A1 US 20050112000 A1 US20050112000 A1 US 20050112000A1 US 80567104 A US80567104 A US 80567104A US 2005112000 A1 US2005112000 A1 US 2005112000A1
Authority
US
United States
Prior art keywords
extended parts
core
coil
stator
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
US10/805,671
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English (en)
Inventor
Si Jung
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Gwangju Electronics Co Ltd
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 Samsung Gwangju Electronics Co Ltd filed Critical Samsung Gwangju Electronics Co Ltd
Assigned to SAMSUNG GWANG JU ELECTRONICS CO., LTD. reassignment SAMSUNG GWANG JU ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JUNG, SI HWAN
Publication of US20050112000A1 publication Critical patent/US20050112000A1/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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors 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
    • 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

Definitions

  • the present invention relates, in general, to a linear compressor and, more particularly, to a linear compressor having a linear motor that is supplied with power and operates a piston.
  • a linear compressor is used to compress a refrigerant of a refrigeration apparatus, such as a refrigerator and an air conditioner, and refers to a compressor adopting a linear motor, which reciprocates linearly, as a drive means to reciprocate a piston.
  • a conventional linear compressor includes a cylinder block in which a compression chamber is formed, a piston which is placed in the compression chamber to be reciprocated, and a cylinder head in which an intake chamber to draw a refrigerant and a discharge chamber to discharge the refrigerant are formed.
  • the conventional linear compressor includes a linear motor, which includes a mover combined with the piston and integrated with a cylindrical magnet surrounding the cylinder block, and a first core and a stator fixedly arranged in inside and outside of the mover, respectively.
  • the stator includes a second core formed of electrical steel sheets and a coil configured to generate a magnetic flux.
  • a second core formed of electrical steel sheets and a coil configured to generate a magnetic flux.
  • one side of the second core facing the magnet is opened, and two extended parts extend inward from both ends of an opening of the second core to a predetermined distance to cover portions of the opening.
  • the two extended parts enable an area of the second core facing the magnet to increase so as to increase strokes of the magnet.
  • the coil is placed in a space inside the two extended parts, so that the second core generates a magnetic flux and the magnetic flux flows from the second core to the first core through the magnet.
  • a linear compressor including a mover reciprocating together with a piston to compress a refrigerant, and a stator generating a magnetic field to interact with the mover, the stator including a core provided with an opening at outside thereof, two extended parts extended inward from both ends of the opening of the core to cover portions of the opening and to be spaced apart from each other, and a coil wound in a space inside the two extended parts and a space between the two extended parts.
  • the coil is wound in a shape corresponding to shapes of the two extended parts.
  • the two extended parts has opposite ends that are inclined to approach each other at outside edges thereof.
  • the two extended parts has opposite ends that are each shaped in a semicircle.
  • a linear motor including a stator comprising a second core provided with an opening at outside thereof, two extended parts extended inward from both ends of the opening of the second core to cover portions of the opening and to be spaced apart from each other, and a coil wound in a space inside the two extended parts and a space between the two extended parts, a first core, and a magnet reciprocating between the stator and the first core.
  • the coil is wound in a shape corresponding to shapes of the two extended parts.
  • the two extended parts have opposite ends that are inclined to approach each other at outside edges thereof.
  • the two extended parts have opposite ends that are each shaped in a semicircle.
  • FIG. 1 is a side cross-section showing an entire structure of a linear compressor, according to the present invention
  • FIG. 2 is a perspective view showing a stator and a mover of the linear compressor of FIG. 1 ;
  • FIG. 3 is a cross-section showing a stator, according to another embodiment of the present invention.
  • FIG. 4 is a cross-section showing a stator, according to still another embodiment of the present invention.
  • a linear compressor according to the present invention includes a closed container 10 to form a closed structure by combining an upper container 11 with a bottom container 12 , a compression unit 20 to draw, compress and discharge a refrigerant, and a drive unit 30 to operate the compression unit 20 .
  • the compression unit 20 includes a cylinder 21 forming a compression chamber 21 a , a piston 22 placed in the compression chamber 21 a to be reciprocated, and a cylinder head 23 to draw and discharge the refrigerant. Furthermore, a support part 25 extending outward from an outer surface of a lower portion of the cylinder 21 is provided to support a stator 32 of the drive unit 30 , which is described later. An intake chamber 23 a and a discharge chamber 23 b operated in conjunction with the compression chamber 21 a are provided in the cylinder head 23 to draw and discharge the refrigerant as the piston 22 reciprocates, respectively. Furthermore, a valve plate 24 , on which an intake valve 24 a and a discharge valve 24 b to allow the intake chamber 23 a and the discharge chamber 23 b to be opened and closed, respectively, is provided between the cylinder head 23 and the cylinder 21 .
  • the drive unit 30 includes a linear motor having a first core 31 combined with an outside of the cylinder 21 , the stator 32 spaced apart from the first core 31 by a certain distance, and a mover 35 provided between the first core 31 and the stator 32 to interact with an electric field generated by the stator 32 .
  • the mover 35 includes a cylindrical magnet 35 a placed to surround the cylinder 21 and a holder part 35 b to fasten and support the magnet 35 a .
  • the holder part 35 b of the mover 35 is placed coaxially with respect to a connection shaft 22 a provided on an upper portion of the piston 22 so that the holder part 35 b of the mover 35 reciprocates vertically, together with the piston 22 .
  • the first core 31 and the stator 32 are provided inside and outside the magnet 35 a , respectively.
  • the first core 31 is provided outside the cylinder 21 to form a cylindrical shape, so that the first core 31 functions to simultaneously guide the reciprocating of the mover 35 and allow a magnetic flux to smoothly flow from the stator 32 through the magnet 35 a of the mover 35 .
  • the stator 32 includes a second core 33 formed of electrical steel sheets and a coil 34 to generate a magnetic flux. A lower end of the stator 32 is supported by the support part 25 , and an upper end of the stator 32 is supported by a fastening frame 40 .
  • stator 32 of the linear compressor according to the present invention is described in more detail with reference to FIG. 2 below.
  • the second core 33 of the stator 32 is formed by overlapping electrical steel sheets in a radial direction.
  • a side of the second core 33 facing the magnet 35 a is opened, and first and second extended parts 33 b and 33 c are extended inward from upper and lower ends of an opening 33 a of the second core 33 to cover upper and lower portions of the opening 33 a.
  • an area of the second core 33 facing the magnet 35 a is increased by the first and second extended parts 33 b and 33 c , thus enabling strokes of the magnet 35 a to increase.
  • the first and second extended parts 33 b and 33 c are provided to be spaced apart from each other to allow a magnetic flux generated by the coil 34 to smoothly flow from the second core 33 to the first core 31 through the magnet 35 a.
  • the coil 34 is wound through a first accommodation part 33 d formed inside the first and second extended parts 33 b and 33 c , and a second accommodation part 33 e formed in a space between the first and second extended parts 33 b and 33 c .
  • the coil 34 is wound in a shape corresponding to the first accommodation part 33 d and the second accommodation part 33 e to be maximally wound in the first and second accommodation parts 33 d and 33 e.
  • ends of the first and second extended parts 33 b and 33 c may be inclined to approach each other at outer edges thereof to prevent a magnetic flux from leaking and to allow the magnetic flux to flow to the magnet 35 a while the magnetic flux flows through the space between the first and second extended parts 33 b and 33 c.
  • the coil 34 is wound in a shape corresponding to shapes of the first and second extended parts 33 b and 33 c to allow the coil 34 to be wound in the space between the first and second extended parts 33 b and 33 c.
  • ends of the first and second extended parts 33 b and 33 c may be each shaped in a semicircle to prevent a magnetic flux from leaking.
  • the coil 34 is wound in a shape corresponding to the shapes of the ends of the first and second extended parts 33 b and 33 c.
  • the coil 34 is wound in not only the first accommodation part 33 d formed inside the first and second extended parts 33 b and 33 c but also the second accommodation part 33 e formed in the space between the first and second extended parts 33 b and 33 c . Accordingly, when the coil 34 is wound a same number of times as in a conventional compressor, a diameter of the coil 34 may be increased.
  • a stator of the linear compressor according to the present invention has an opening at one side, and includes a core provided with two extended parts at the opening, a coil wound in a space inside the two extended parts and a space formed between the two extended parts.
  • the coil is also wound in the space between the two extended parts, so that a magnetic flux generated around the coil is increased, thus increasing an impellent force of the mover. Accordingly, a performance of a compressor is entirely improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Linear Motors (AREA)
US10/805,671 2003-11-21 2004-03-19 Linear motor and linear compressor having the same Abandoned US20050112000A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2003-83190 2003-11-21
KR10-2003-0083190A KR100537011B1 (ko) 2003-11-21 2003-11-21 리니어 모터 및 이를 갖춘 리니어 압축기

Publications (1)

Publication Number Publication Date
US20050112000A1 true US20050112000A1 (en) 2005-05-26

Family

ID=34587981

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/805,671 Abandoned US20050112000A1 (en) 2003-11-21 2004-03-19 Linear motor and linear compressor having the same

Country Status (6)

Country Link
US (1) US20050112000A1 (it)
JP (1) JP2005155593A (it)
KR (1) KR100537011B1 (it)
CN (1) CN100517911C (it)
BR (1) BRPI0401581A (it)
IT (1) ITRM20040188A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050207918A1 (en) * 2004-03-17 2005-09-22 Samsung Gwangju Electronics Co., Ltd. Linear compressor
US20090232666A1 (en) * 2004-08-30 2009-09-17 Lg Electronics, Inc. Linear Compressor
US11268504B2 (en) * 2017-09-28 2022-03-08 Lg Electronics Inc. Linear compressor comprising a stator defining a cylinder space for a cylinder supported by a support member with a cylindrical portion, a first bent portion, and a second bent portion configured to support an area of the cylinder in an axial direction

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100680227B1 (ko) * 2005-10-06 2007-02-08 엘지전자 주식회사 리니어 모터의 고정자
CN102025240A (zh) * 2011-01-04 2011-04-20 中国电子科技集团公司第二十一研究所 斯特林制冷机用直线电机结构
BRPI1103496A2 (pt) 2011-07-20 2013-10-01 Whirlpool Sa motor linear para compressor e compressor provido de motor linear
CN103001451B (zh) * 2011-09-13 2015-11-04 珠海格力节能环保制冷技术研究中心有限公司 直线电机及具有其的压缩机
WO2014071854A1 (zh) * 2012-11-07 2014-05-15 海尔集团公司 直线压缩机的定子及其固定方法、直线电机及直线压缩机
DE102017103090B4 (de) * 2017-02-15 2020-06-04 Kolektor Group D.O.O. Elektromagnetischer Linearaktuator
KR102107062B1 (ko) * 2018-09-17 2020-05-06 엘지전자 주식회사 리니어 모터 및 리니어 압축기

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6077054A (en) * 1997-12-23 2000-06-20 Samsung Electronics Co., Ltd. Stator of linear compressor
US6809434B1 (en) * 1999-06-21 2004-10-26 Fisher & Paykel Limited Linear motor
US6882075B2 (en) * 2001-04-19 2005-04-19 Lg Electronics Inc. Bobbin for reciprocating motor and fabrication method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6077054A (en) * 1997-12-23 2000-06-20 Samsung Electronics Co., Ltd. Stator of linear compressor
US6809434B1 (en) * 1999-06-21 2004-10-26 Fisher & Paykel Limited Linear motor
US6882075B2 (en) * 2001-04-19 2005-04-19 Lg Electronics Inc. Bobbin for reciprocating motor and fabrication method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050207918A1 (en) * 2004-03-17 2005-09-22 Samsung Gwangju Electronics Co., Ltd. Linear compressor
US20090232666A1 (en) * 2004-08-30 2009-09-17 Lg Electronics, Inc. Linear Compressor
US11268504B2 (en) * 2017-09-28 2022-03-08 Lg Electronics Inc. Linear compressor comprising a stator defining a cylinder space for a cylinder supported by a support member with a cylindrical portion, a first bent portion, and a second bent portion configured to support an area of the cylinder in an axial direction
US11566611B2 (en) 2017-09-28 2023-01-31 Lg Electronics Inc. Linear compressor with a cylinder supported by a support member having bent portions

Also Published As

Publication number Publication date
KR20050049270A (ko) 2005-05-25
CN100517911C (zh) 2009-07-22
CN1619916A (zh) 2005-05-25
ITRM20040188A1 (it) 2004-07-15
KR100537011B1 (ko) 2005-12-16
JP2005155593A (ja) 2005-06-16
BRPI0401581A (pt) 2005-07-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SAMSUNG GWANG JU ELECTRONICS CO., LTD., KOREA, REP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JUNG, SI HWAN;REEL/FRAME:015501/0596

Effective date: 20040315

STCB Information on status: application discontinuation

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