KR20050105619A - Linear compressor - Google Patents

Linear compressor Download PDF

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Publication number
KR20050105619A
KR20050105619A KR1020040030667A KR20040030667A KR20050105619A KR 20050105619 A KR20050105619 A KR 20050105619A KR 1020040030667 A KR1020040030667 A KR 1020040030667A KR 20040030667 A KR20040030667 A KR 20040030667A KR 20050105619 A KR20050105619 A KR 20050105619A
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KR
South Korea
Prior art keywords
holder
coil
terminal
connection
lead wire
Prior art date
Application number
KR1020040030667A
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Korean (ko)
Inventor
정시환
Original Assignee
삼성광주전자 주식회사
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Priority to KR1020040030667A priority Critical patent/KR20050105619A/en
Publication of KR20050105619A publication Critical patent/KR20050105619A/en

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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
    • F04B39/0027—Pulsation and noise damping means
    • 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • 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
    • Y10S417/00—Pumps
    • Y10S417/902—Hermetically sealed motor pump unit

Abstract

본 발명은 리니어 압축기에 관한 것으로, 고정자(32)의 코일(32a)과 외부 전원을 공급하는 리드선(40)을 전기적으로 접속하기 위해 접속홀더(50)를 구비한다.The present invention relates to a linear compressor, and includes a connection holder (50) for electrically connecting the coil (32a) of the stator (32) and the lead wire (40) for supplying external power.

상기 접속홀더(50)는 홀더케이스(51)와, 홀더케이스(51)를 덮는 홀더덮개(52)를 포함하여 구성되며, 홀더케이스(51)에는 코일(32a)로부터 인출된 코일선(32d)이 수납되는 삽입홈(53)이 형성되며, 상기 삽입홈(53)에는 리드선(40)의 끝단에 연결된 터미널(41)이 삽입 고정되게 된다. The connection holder 50 includes a holder case 51 and a holder cover 52 covering the holder case 51, and a coil wire 32d drawn out from the coil 32a in the holder case 51. The insertion groove 53 is formed therein, and the terminal 41 connected to the end of the lead wire 40 is inserted into and fixed to the insertion groove 53.

그리고, 홀더케이스(51)와 홀더덮개(52) 사이에는 사출성형을 통한 수지재의 성형물(60)이 충진되어 리드선(40)의 터미널(41)과 코일선(32d) 간의 고정을 견고히 이룰 수 있게 된다.In addition, a molding 60 made of a resin material is filled between the holder case 51 and the holder cover 52 so as to securely fix the terminal 41 of the lead wire 40 and the coil wire 32d. do.

Description

리니어 압축기{Linear compressor}Linear compressor {Linear compressor}

본 발명은 리니어 압축기에 관한 것으로, 보다 상세하게는 외부의 전원을 인가하는 리드선과 고정자의 코일을 서로 접속시켜주는 접속홀더를 갖춘 리니어 압축기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear compressor, and more particularly, to a linear compressor having a connection holder for connecting a lead wire for applying external power and a coil of a stator to each other.

일반적으로 리니어 압축기는 선형운동을 하는 리니어모터를 채택하여 냉매를 흡입하고 압축한 후 토출시키는 것으로, 냉매를 압축하는 압축장치와 이를 구동하는 구동장치로 구성된다.In general, the linear compressor adopts a linear motor having a linear motion to suck, compress, and discharge the refrigerant, and is composed of a compression device for compressing the refrigerant and a driving device for driving the refrigerant.

압축장치는 압축실을 형성하는 실린더블록과, 압축실 내부를 왕복 운동하는 피스톤을 구비하며, 구동장치는 내측 및 외측고정자와, 두 고정자 사이에 배치되어 피스톤과 연동하는 가동자로 구성된다.The compression device includes a cylinder block forming a compression chamber, and a piston for reciprocating the inside of the compression chamber. The driving device includes an inner and outer stator and a mover disposed between the two stators to interlock with the piston.

고정자는 코일이 권선된 보빈과, 보빈에 설치되는 다수개의 전기강판으로 구성되며, 코일은 외부의 전원을 공급하는 리드선과 전기적으로 접속하게 된다. 이를 위해, 종래 리니어 압축기는 접속홀더를 구비하게 된다.The stator is composed of a bobbin wound with a coil and a plurality of electrical steel plates installed on the bobbin, and the coil is electrically connected to a lead wire for supplying external power. To this end, the conventional linear compressor is provided with a connection holder.

그러나, 종래 리니어 압축기는 접속홀더 내부에서 리드선과 코일이 서로 묶여지거나 별도의 고정편을 압착하여 그 접속을 이루게 된다.However, in the conventional linear compressor, the lead wire and the coil are bundled with each other in the connection holder, or a separate fixing piece is pressed to form the connection.

따라서, 압축기 구동 시 발생되는 진동에 의해 리드선으로부터 코일이 쉽게 단락되어 압축기의 신뢰성이 저하되는 문제점이 발생된다.Therefore, a problem occurs in that the coil is easily shorted from the lead wire by vibration generated when the compressor is driven, thereby lowering the reliability of the compressor.

본 발명은 이와 같은 문제점을 해결하기 위한 것으로, 그 목적은 리드선과 코일 간의 전기적 접속을 견고히 이룰 수 있는 접속홀더를 갖춘 리니어 압축기를 제공하는 것이다.SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object thereof is to provide a linear compressor having a connection holder capable of firmly establishing an electrical connection between a lead wire and a coil.

이러한 목적을 달성하기 위한 본 발명은; 내부에 코일이 권선된 고정자와, 상기 고정자에 외부 전원을 공급을 하는 리드선과, 상기 코일과 상기 리드선을 전기적으로 접속하기 위한 접속홀더를 갖춘 리니어 압축기에 있어서, 상기 리드선은 단부에 터미널이 연결되고, 상기 접속홀더는 상기 터미널이 삽입되며 상기 코일로부터 인출된 코일선이 수납되는 삽입홈이 형성된 홀더케이스와, 상기 홀더케이스를 덮는 홀더덮개와, 상기 홀더케이스와 상기 홀더덮개를 고정하기 위해 사출성형을 통해 상기 홀더케이스와 상기 홀더덮개 사이에 충진된 성형물을 구비한 것을 특징으로 한다.The present invention for achieving this object is; A linear compressor having a stator with a coil wound therein, a lead wire for supplying external power to the stator, and a connection holder for electrically connecting the coil and the lead wire, wherein the lead wire has a terminal connected to an end thereof. The holder may be inserted into the holder and formed with a holder case having an insertion groove into which the coil wire drawn out from the coil is received, a holder cover covering the holder case, injection molding to fix the holder case and the holder cover. It is characterized by having a molding filled between the holder case and the holder cover through.

또한, 상기 성형물은 수지재로 마련된 것을 특징으로 한다.In addition, the molded article is characterized in that the resin material.

또한, 상기 터미널의 일측에는 절연코팅되어 있는 상기 코일선의 코팅을 절개함과 동시에 사이에 상기 코일선이 끼워 고정되게 하는 접속슬릿이 마련되어 있는 것을 특징으로 한다.In addition, one side of the terminal is characterized in that the connection slit for cutting the coating of the coil wire that is insulated coating and at the same time the coil wire is sandwiched between the terminal is provided.

또한, 상기 고정자는 상기 코일이 권선되는 보빈을 더 구비하며, 상기 접속홀더는 상기 보빈에 고정되는 것을 특징으로 한다.The stator may further include a bobbin in which the coil is wound, and the connection holder is fixed to the bobbin.

이하에서는 본 발명에 따른 바람직한 실시 예를 첨부 도면을 참조하여 상세히 설명한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 리니어 압축기의 전체 구조를 도시한 단면도이다.1 is a cross-sectional view showing the overall structure of a linear compressor according to the present invention.

도 1를 참조하면, 본 발명에 따른 리니어 압축기는 밀폐용기(10) 내부에 냉매를 압축하는 압축장치(20)와, 압축장치(20)를 구동하는 구동장치(30)를 구비한다.Referring to FIG. 1, the linear compressor according to the present invention includes a compression device 20 for compressing a refrigerant inside the sealed container 10, and a driving device 30 for driving the compression device 20.

압축장치(20)는 압축실(21a)을 형성하는 실린더블록(21)과, 압축실(21a) 내에 왕복 운동가능하게 마련된 피스톤(22)을 포함하며, 실린더블록(21)의 하측에는 내부에 흡입실(미도시)과 토출실(미도시)이 형성된 실린더헤드(23)가 결합된다.The compression device 20 includes a cylinder block 21 forming a compression chamber 21a and a piston 22 provided in the compression chamber 21a so as to reciprocate. The cylinder head 23 in which the suction chamber (not shown) and the discharge chamber (not shown) are formed is combined.

구동장치(30)는 실린더블록(21)의 외측에 마련되는 내측고정자(31)와, 내측고정자(31)의 외주면과 소정간격을 두고 둘러싸며 자장을 형성하는 외측고정자(32)를 구비하며, 내측고정자(31)와 외측고정자(32) 사이에는 상하 왕복 운동하도록 마그네트(33a)가 설치된 가동자(33)가 배치된다.The drive device 30 includes an inner stator 31 provided at an outer side of the cylinder block 21, and an outer stator 32 which surrounds the outer circumferential surface of the inner stator 31 at a predetermined interval and forms a magnetic field. Between the inner stator 31 and the outer stator 32, a mover 33 provided with a magnet 33a is arranged to reciprocate up and down.

외측고정자(32)는 전원을 인가받아 자장을 형성하도록 코일(32a)이 권선된 보빈(32b)과, 보빈(32b)에 원주방향으로 이격되게 설치된 다수개의 전기강판(32c)을 구비하게 된다. 또, 코일(32a)은 외부의 전원을 공급하는 리드선(40)과 전기적으로 접속되게 되는데, 이를 위해 보빈(32b)에는 접속홀더(50)가 마련된다.The outer stator 32 includes a bobbin 32b having a coil 32a wound around the bobbin 32b and a plurality of electrical steel plates 32c circumferentially spaced on the bobbin 32b. In addition, the coil 32a is electrically connected to the lead wire 40 for supplying external power. For this purpose, the bobbin 32b is provided with a connection holder 50.

도 2를 참조하면, 접속홀더(50)는 홀더케이스(51)와, 홀더케이스(51)를 덮는 홀더덮개(52)를 포함하여 구성되며, 홀더케이스(51)에는 코일(32a)로부터 인출된 코일선(32d)이 수납되는 삽입홈(53)이 형성된다. Referring to FIG. 2, the connection holder 50 includes a holder case 51 and a holder cover 52 covering the holder case 51, and the holder case 51 is drawn out of the coil 32a. An insertion groove 53 is formed in which the coil wire 32d is accommodated.

접속홀더(50)의 삽입홈(53)에는 리드선(40)의 단부에 연결된 터미널(41)이 삽입 고정되게 된다. 이때 터미널(41)에는 절연 코팅되어 있는 코일선(32d)의 코팅을 절개함과 동시에 사이에 코일선(32d)이 끼워 고정되게 하는 접속슬릿(42)이 형성되게 된다. The terminal 41 connected to the end of the lead wire 40 is inserted into and fixed to the insertion groove 53 of the connection holder 50. At this time, the terminal 41 is formed with a connection slit 42 which cuts the coating of the coil wire 32d that is insulated and simultaneously clamps the coil wire 32d therebetween.

그리고, 도 3에 도시된 바와 같이, 홀더케이스(51)와 홀더덮개(52) 사이에는 사출성형을 통한 수지재의 성형물(60)이 충진되게 되며, 이러한 성형물(60)을 통해 리드선(40)의 터미널(41)과 코일선(32d) 간의 고정을 보다 견고히 이룰 수 있게 되고, 홀더케이스(51)와 홀더덮개(52) 사이의 밀폐력 또한 향상시킬 수 있게 된다.And, as shown in Figure 3, between the holder case 51 and the holder cover 52 is filled with a molding 60 of the resin material through the injection molding, through the molding 60 of the lead wire 40 The fixing between the terminal 41 and the coil wire 32d can be achieved more firmly, and the sealing force between the holder case 51 and the holder cover 52 can also be improved.

다음은 본 발명에 따른 밀폐형 리니어 압축기의 동작 및 그에 따른 효과를 설명한다.The following describes the operation and the effects of the hermetic linear compressor according to the present invention.

리드선(40)으로부터 고정자(32)의 코일(32a)로 전원이 인가되면, 전자기적 상호 작용에 의해 가동자(33) 및 피스톤(22)이 상하 왕복 운동하면서 압축실(21a) 내부의 냉매를 압축하게 된다.When power is applied from the lead wire 40 to the coil 32a of the stator 32, the movable element 33 and the piston 22 reciprocate up and down by the electromagnetic interaction, and the refrigerant in the compression chamber 21a is transferred. Will be compressed.

이때, 피스톤(22)의 왕복 운동에 의해 진동이 발생하게 되는데, 본 발명에 따른 리니어 압축기는 리드선(40)과 코일(32a)의 코일선(32d)을 결합시켜주는 접속홀더(50) 내부에 수지재의 성형물(60)이 충진되게 되므로 압축기 구동 시 발생되는 진동에 의해 리드선(40) 및 코일선(32d)이 단락되는 것을 방지할 수 있게 된다.At this time, the vibration is generated by the reciprocating motion of the piston 22, the linear compressor according to the present invention in the connection holder 50 for coupling the lead wire 40 and the coil wire 32d of the coil 32a Since the molding 60 of the resin material is filled, the lead wire 40 and the coil wire 32d may be prevented from being shorted due to the vibration generated when the compressor is driven.

이상에서 상세히 설명한 바와, 본 발명에 따른 리니어 압축기는 리드선의 끝단에 터미널이 연결되고, 이러한 터미널은 접속홀더의 홀더케이스에 형성된 삽입홈에 삽입 고정되게 된다. 이후 홀더케이스는 홀더덮개에 의해 밀폐되게 되는데, 이때 홀더케이스와 홀더덮개 사이에 수지재의 성형물이 충진되게 됨으로 리드선과 삽입홈에 수납된 코일은 견고한 고정을 이룰 수 있게 된다.As described above in detail, in the linear compressor according to the present invention, a terminal is connected to an end of a lead wire, and the terminal is inserted into and fixed to an insertion groove formed in a holder case of the connection holder. After that, the holder case is sealed by the holder cover. At this time, the molded part of the resin material is filled between the holder case and the holder cover, so that the coil housed in the lead wire and the insertion groove can achieve a firm fixing.

이에 따라, 압축기 구동시 발생되는 진동에 의해 리드선 및 코일선이 단락되는 것이 방지되어 압축기의 신뢰성을 향상시킬 수 있게 되는 효과가 있다. Accordingly, the lead wire and the coil wire are prevented from being short-circuited by the vibration generated when the compressor is driven, thereby improving the reliability of the compressor.

도 1은 본 발명에 따른 리니어 압축기의 전체적인 구조를 보인 단면도이다.1 is a cross-sectional view showing the overall structure of a linear compressor according to the present invention.

도 2는 본 발명에 따른 리니어 압축기에 마련된 접속홀더를 보인 분해 사시도이다.2 is an exploded perspective view showing a connection holder provided in the linear compressor according to the present invention.

도 3은 본 발명에 따른 리니어 압축기에 마련된 접속홀더를 보인 단면도이다.3 is a cross-sectional view showing a connection holder provided in the linear compressor according to the present invention.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on main parts of drawing

10 : 밀폐용기, 20 : 압축장치,10: sealed container, 20: compression device,

30 : 구동장치, 32 : 외측고정자,30: driving device, 32: outer stator,

32a : 코일, 32b : 보빈,32a: coil, 32b: bobbin,

32c : 전기강판, 32d : 코일선,32c: electrical steel sheet, 32d: coil wire,

40 : 리드선, 41 : 터미널,40: lead wire, 41: terminal,

42 : 접속슬릿, 50 : 접속홀더,42: connection slit, 50: connection holder,

51 : 홀더케이스, 52 : 홀더덮개,51: holder case, 52: holder cover,

53 : 삽입홈, 60 : 성형물.53: insertion groove, 60: molding.

Claims (4)

내부에 코일이 권선된 고정자와, 상기 고정자에 외부 전원을 공급을 하는 리드선과, 상기 코일과 상기 리드선을 전기적으로 접속하기 위한 접속홀더를 갖춘 리니어 압축기에 있어서, A linear compressor having a stator with a coil wound therein, a lead wire for supplying external power to the stator, and a connection holder for electrically connecting the coil and the lead wire, 상기 리드선은 단부에 터미널이 연결되고,The lead is connected to the terminal terminal, 상기 접속홀더는 상기 터미널이 삽입되며 상기 코일로부터 인출된 코일선이 수납되는 삽입홈이 형성된 홀더케이스와, 상기 홀더케이스를 덮는 홀더덮개와, 상기 홀더케이스와 상기 홀더덮개를 고정하기 위해 사출성형을 통해 상기 홀더케이스와 상기 홀더덮개 사이에 충진된 성형물을 구비한 것을 특징으로 하는 리니어 압축기.The connection holder may include an injection molding to fix the holder case and the holder cover, a holder case having an insertion groove into which the terminal is inserted and an insertion groove into which a coil wire drawn out from the coil is received, a holder cover covering the holder case And a molding filled between the holder case and the holder cover. 제 1항에 있어서,The method of claim 1, 상기 성형물은 수지재로 마련된 것을 특징으로 하는 리니어 압축기.The molded article is a linear compressor, characterized in that provided with a resin material. 제 1항에 있어서,The method of claim 1, 상기 터미널의 일측에는 절연코팅되어 있는 상기 코일선의 코팅을 절개함과 동시에 사이에 상기 코일선이 끼워 고정되게 하는 접속슬릿이 마련되어 있는 것을 특징으로 하는 리니어 압축기.And a connection slit provided at one side of the terminal to cut the coating of the coiled wire that is insulated coated and to sandwich the coiled wire in between. 제 1항에 있어서,The method of claim 1, 상기 고정자는 상기 코일이 권선되는 보빈을 더 구비하며,The stator further includes a bobbin to which the coil is wound, 상기 접속홀더는 상기 보빈에 고정되는 것을 특징으로 하는 리니어 압축기.And the connection holder is fixed to the bobbin.
KR1020040030667A 2004-04-30 2004-04-30 Linear compressor KR20050105619A (en)

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KR1020040030667A KR20050105619A (en) 2004-04-30 2004-04-30 Linear compressor

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KR1020040030667A KR20050105619A (en) 2004-04-30 2004-04-30 Linear compressor

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