KR100244380B1 - Hermetic compressor - Google Patents

Hermetic compressor Download PDF

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Publication number
KR100244380B1
KR100244380B1 KR1019970052827A KR19970052827A KR100244380B1 KR 100244380 B1 KR100244380 B1 KR 100244380B1 KR 1019970052827 A KR1019970052827 A KR 1019970052827A KR 19970052827 A KR19970052827 A KR 19970052827A KR 100244380 B1 KR100244380 B1 KR 100244380B1
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KR
South Korea
Prior art keywords
valve
discharge valve
discharge
hermetic compressor
cylinder head
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KR1019970052827A
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Korean (ko)
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KR19990031927A (en
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오일교
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배길성
삼성광주전자주식회사
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Priority to KR1019970052827A priority Critical patent/KR100244380B1/en
Publication of KR19990031927A publication Critical patent/KR19990031927A/en
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    • 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
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
    • 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
    • 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
    • F04B39/0044—Pulsation and noise damping means with vibration damping supports
    • 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
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1066—Valve plates
    • 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
    • F04B39/123—Fluid connections

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Abstract

본 발명은 밀폐형 압축기에 관한 것으로, 밸브 플레이트와 실린더 헤드 사이에 토출밸브가 개폐가능하게 설치되는 밀폐형 압축기에 있어서, 상기 밸브 플레이트의 토출공을 복개하도록 토출밸브를 위치시키고, 상기 토출공의 상면 외주연에는 토출밸브가 안착되는 토출밸브 안착홈이 형성되며, 상기 토출밸브의 상측에는 상기 토출밸브를 지지하는 지지돌부가 형성되어 토출밸브의 개폐영역을 제한하는 밸브스토퍼를 양단부가 고정되도록 설치하고, 상기 밸브스토퍼의 위치를 규제하는 규제돌부를 상기 실린더 헤드의 하면 소정 위치에 형성하여 구성한 것이다.The present invention relates to a hermetic compressor, wherein in a hermetic compressor in which a discharge valve is opened and closed between the valve plate and the cylinder head, the discharge valve is positioned to cover the discharge hole of the valve plate, and the outside of the upper surface of the discharge hole. A discharge valve seating groove for discharging the discharge valve is formed at the periphery thereof, and a support protrusion for supporting the discharge valve is formed at an upper side of the discharge valve to install a valve stopper for restricting the opening and closing area of the discharge valve. A regulating protrusion for regulating the position of the valve stopper is formed at a predetermined position on the lower surface of the cylinder head.

이와 같이 함으로써 토출밸브가 상하로 이동가능하도록 설치되어 고정되는 부위가 없어지기 때문에 토출밸브의 편마모 발생을 방지하여 토출밸브의 수명이 연장되는 효과가 있고, 이러한 토출밸브를 양단부가 고정되는 밸브스토퍼가 지지하도록 하여 유동소음도 현저하게 저감되도록 한 것이다.In this way, since the discharge valve is installed to be movable up and down, there is no fixed portion, thereby preventing uneven wear of the discharge valve and extending the service life of the discharge valve. It is to support the flow noise is also significantly reduced.

Description

밀폐형 압축기Hermetic compressor

본 발명은 밀폐형 압축기에 관한 것으로, 특히 토출밸브의 일단부를 고정시키지 않고 자유상태로 위치시키고, 밸브스토퍼에 의하여 토출밸브의 개폐영역을 제한하도록 하여 밸브의 수명을 증대시키도록 한 밀폐형 압축기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor, and more particularly, to a hermetic compressor which is positioned freely without fixing one end of the discharge valve and increases the service life of the valve by limiting the opening / closing area of the discharge valve by the valve stopper. .

일반적인 밀폐형 압축기는 도 1에 도시한 바와 같이, 상,하부 용기(1)(2)의 내부에 고정자(3)와 회전자(4)로 이루어지는 전동 기구부(5)와, 회전자(4)의 중앙에 압입 고정된 크랭크 샤프트(6)의 회전 동작에 의해 냉매를 흡입하여 압축시킨 후 토출시키는 압축 기구부(7)로 구분할 수 있다.As shown in FIG. 1, a general hermetic compressor includes an electric mechanism part 5 and a rotor 4 including a stator 3 and a rotor 4 inside upper and lower containers 1 and 2. By the rotation operation of the crankshaft 6 press-fitted in the center, it can be divided into the compression mechanism part 7 which inhales, compresses, and discharges a refrigerant | coolant.

압축 기구부(7)는 냉매의 흡입 공간을 이루는 실린더(8)가 일체로 형성된 실린더 블록(9)과, 크랭크 샤프트(6)의 하단부에 결합되어 실린더(8)의 내부에서 직선 왕복 운동을 하는 피스톤(10)과, 실린더(8)의 단부에 복개 고정되는 실린더 헤드(11)와, 실린더(8)와 실린더 헤드(11)의 사이에 개재되어 냉매를 실린더(8)의 내부로 흡입함과 아울러 압축 냉매를 토출시키는 밸브장치(12) 등을 포함하고 있다.The compression mechanism 7 includes a cylinder block 9 in which a cylinder 8 forming a suction space of a refrigerant is integrally formed, and a piston coupled to a lower end of the crankshaft 6 to perform linear reciprocating motion inside the cylinder 8. 10, the cylinder head 11 which is fixed to the end of the cylinder 8, and interposed between the cylinder 8 and the cylinder head 11 to suck the refrigerant into the cylinder 8, And a valve device 12 for discharging the compressed refrigerant.

실린더 헤드(11)의 상부에는 소정의 형상을 갖는 머플러(13)가 고정자(3)와 밀착되는 형태로 세워져 고정되며, 머플러(13)에는 하부 용기(2)를 관통하여 흡입관(14)이 연결설치되어 있다.The muffler 13 having a predetermined shape is erected and fixed to the upper part of the cylinder head 11 so as to be in close contact with the stator 3, and the suction pipe 14 is connected to the muffler 13 by penetrating the lower container 2. It is installed.

여기서 밸브장치(12)는 도 2 내지 도 4에 도시한 바와 같이, 냉매의 흡입공(15a)과 토출공(15b)이 형성되어 있는 밸브 플레이트(15)의 상측에는 토출공(15b)을 개폐하는 토출밸브(16)가 설치되어 있고, 하측에는 흡입공(15a)을 개폐하는 흡입밸브(17)가 설치되어 있다.2 to 4, the valve device 12 opens and closes the discharge hole 15b on the upper side of the valve plate 15 in which the suction hole 15a and the discharge hole 15b of the refrigerant are formed. The discharge valve 16 is provided, and the suction valve 17 which opens and closes the suction hole 15a is provided in the lower side.

또한, 토출밸브(16)의 상측에는 토출밸브의 개폐영역을 제한하는 밸브스토퍼(18)와, 밸브스토퍼(18)의 상측에는 토출밸브(16) 및 밸브스토퍼(18)가 정위치에 위치하도록 그 위치를 규제하는 밸브키퍼(19)가 설치되어 있다.In addition, the valve stopper 18 which restricts the opening / closing area of the discharge valve is disposed above the discharge valve 16, and the discharge valve 16 and the valve stopper 18 are positioned at the upper side of the valve stopper 18. The valve keeper 19 which regulates the position is provided.

이와 같이 구성되어 있는 일반적인 밀폐형 압축기는 흡입관(14)을 통하여 흡입된 냉매가 머플러(13)를 지나 실린더 헤드(11) 및 밸브장치(12)를 통과한 후에 실린더(8)의 내부로 유입되는 흡입 과정과, 크랭크 샤프트(6)의 회전에 따른 피스톤(10)의 직선 왕복 운동에 의하여 흡입 냉매가 압축되는 압축 과정과, 실린더(8)의 내부에서 압축된 냉매가 다시 밸브장치(12) 및 실린더 헤드(11)를 통해 토출 경로를 따라 외부로 토출되는 토출 과정을 반복하게 된다.In the general hermetic compressor configured as described above, the suction sucked into the cylinder 8 after the refrigerant sucked through the suction pipe 14 passes through the muffler 13 and passes through the cylinder head 11 and the valve device 12. Process, a compression process in which the suction refrigerant is compressed by the linear reciprocating motion of the piston 10 according to the rotation of the crankshaft 6, and the refrigerant compressed in the cylinder 8 is again the valve device 12 and the cylinder. The discharge process discharged to the outside along the discharge path through the head 11 is repeated.

그러나 상기한 바와 같이 냉매가 흡입, 압축 및 토출 과정을 반복하는 과정에서 냉매의 토출시 토출밸브(16)는 일단부만이 지지된 상태로 토출공(15b)을 개폐하도록 고정되어 있기 때문에 고정된 부위에만 마모가 심하게 발생된다는 문제가 있다.However, as described above, when the refrigerant is discharged in the process of repeating the suction, compression, and discharge processes, the discharge valve 16 is fixed to open and close the discharge hole 15b with only one end supported. There is a problem that wear is badly generated only at the site.

또한, 고정되지 않은 토출밸브(16)의 타단부만이 밸브플레이트(15)와 계속해서 접촉되기 때문에 밸브의 유동소음도 크다는 문제가 있다.In addition, since only the other end of the non-fixed discharge valve 16 is in continuous contact with the valve plate 15, there is a problem that the flow noise of the valve is also large.

이와 같은 문제점을 감안하여 안출한 본 발명의 목적은 토출밸브의 편마모를 방지하여 밸브의 수명을 증대시키도록 한 밀폐형 압축기를 제공함에 있다.SUMMARY OF THE INVENTION An object of the present invention devised in view of such a problem is to provide a hermetic compressor which prevents uneven wear of the discharge valve to increase the life of the valve.

본 발명의 다른 목적은 토출밸브의 유동소음을 저감시킨 밀폐형 압축기를 제공함에 있다.Another object of the present invention is to provide a hermetic compressor which reduces the flow noise of the discharge valve.

제1도는 일반적인 밀폐형 압축기의 종단면도.1 is a longitudinal sectional view of a typical hermetic compressor.

제2도는 종래 기술에 의한 밀폐형 압축기의 밸브 장치의 단면도.2 is a cross-sectional view of a valve device of a hermetic compressor according to the prior art.

제3도는 제2도의 분해사시도.3 is an exploded perspective view of FIG.

제4도는 제3도의 실린더헤드를 뒤집어 놓은 상태의 사시도.4 is a perspective view of the cylinder head of FIG. 3 turned upside down.

제5도는 본 발명 실시예에 의한 밸브 장치의 단면도.5 is a cross-sectional view of a valve device according to an embodiment of the present invention.

제6도는 제5도의 분해사시도.6 is an exploded perspective view of FIG.

제7도는 제6도의 실린더헤드를 뒤집은 놓은 상태의 사시도.FIG. 7 is a perspective view of the cylinder head of FIG. 6 turned upside down. FIG.

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

21 : 실린더 헤드 21a : 규제돌부21: cylinder head 21a: regulating protrusion

22 : 밸브플레이트 22b : 토출공22: valve plate 22b: discharge hole

22c : 토출밸브 안착홈 23 : 토출밸브22c: discharge valve seating groove 23: discharge valve

23a : 고정홈 25 : 밸브스토퍼23a: fixing groove 25: valve stopper

25a : 지지돌부25a: support protrusion

상기한 본 발명의 목적을 달성하기 위한 밀폐형 압축기는 밸브 플레이트와 실린더 헤드 사이에 토출밸브가 개폐가능하게 설치되는 밀폐형 압축기에 있어서, 상기 밸브 플레이트의 토출공을 복개하도록 토출밸브를 위치시키고, 상기 토출공의 상면 외주연에는 토출밸브가 안착되는 토출밸브 안착홈이 형성되며, 상기 토출밸브의 상측에는 상기 토출밸브를 지지하는 지지돌부가 형성되어 토출밸브의 개폐영역을 제한하는 밸브스토퍼를 양단부가 고정되도록 설치하고, 상기 밸브스토퍼의 위치를 규제하는 규제돌부를 상기 실린더 헤드의 하면 소정 위치에 형성하여 구성한 것을 특징으로 한다.In the hermetic compressor for achieving the object of the present invention is a hermetic compressor in which the discharge valve is opened and closed between the valve plate and the cylinder head, the discharge valve is positioned to cover the discharge hole of the valve plate, the discharge A discharge valve seating groove in which the discharge valve is seated is formed at the outer circumference of the upper surface, and a support protrusion for supporting the discharge valve is formed at the upper side of the discharge valve to fix a valve stopper for limiting the opening / closing area of the discharge valve. And a restricting protrusion for restricting the position of the valve stopper at a predetermined position on the lower surface of the cylinder head.

상기 토출밸브의 상면에는 지지돌부가 고정되는 고정홈이 형성되는 것이 바람직하다.The upper surface of the discharge valve is preferably formed with a fixing groove in which the support protrusion is fixed.

이하, 상기한 본 발명의 바람직한 실시예를 첨부도면에 의거하여 보다 상세히 설명한다.Hereinafter, preferred embodiments of the present invention described above will be described in more detail with reference to the accompanying drawings.

첨부도면 도 5는 본 발명 실시예에 의한 밸브장치의 단면도이고, 도 6은 도 5의 분해사시도이며, 도 7은 도 6의 실린더헤드를 뒤집은 놓은 상태의 사시도이다.Figure 5 is a cross-sectional view of the valve device according to an embodiment of the present invention, Figure 6 is an exploded perspective view of Figure 5, Figure 7 is a perspective view of the cylinder head of Figure 6 in an inverted state.

이에 도시한 바와 같이, 본 발명 실시예는 토출밸브(23)를 토출공(22b)을 커버할 수 있는 크기로 형성하고, 밸브플레이트(22)의 토출공(22b)의 상면 외주연에 토출밸브 안착홈(22c)을 형성하여 토출밸브(23)를 토출밸브 안착홈(22c)에 안착시킨다. 이와 같이 토출밸브(23)가 토출밸브 안착홈(22c)에 안착된 상태이기 때문에 종래의 경우보다 토출공의 체적(V1〉V2)이 감소되는 것이다.As shown in the drawing, the embodiment of the present invention forms the discharge valve 23 in a size that can cover the discharge hole 22b, and the discharge valve is formed on the outer periphery of the upper surface of the discharge hole 22b of the valve plate 22. A seating groove 22c is formed to seat the discharge valve 23 in the discharge valve seating groove 22c. Thus, since the discharge valve 23 is seated in the discharge valve seating groove 22c, the volume (V 1 > V 2 ) of the discharge hole is reduced compared to the conventional case.

그리고 토출밸브(23)의 상측에는 토출공(22b)의 개폐영역을 한정하는 밸브스토퍼(25)를 양단부가 고정되도록 설치한다.In addition, a valve stopper 25 defining an opening and closing area of the discharge hole 22b is provided on both sides of the discharge valve 23 so as to be fixed.

밸브스토퍼(25)의 중앙부에는 지지돌부(25a)가 형성되어 있어 토출밸브(23)를 지지하도록 하며, 토출밸브(23)의 상면에는 지지돌부(25a)가 삽입고정되는 고정홈(23a)이 형성되어 있다.A support protrusion 25a is formed at the center of the valve stopper 25 to support the discharge valve 23, and a fixing groove 23a in which the support protrusion 25a is inserted and fixed is provided on the upper surface of the discharge valve 23. Formed.

또한, 밸브스토퍼(25)의 상측에는 실린더 헤드(21)가 복개되는데, 실린더 헤드(21)의 하면에는 밸브스토퍼(25)의 위치를 규제하는 규제돌부(21a)가 형성되어 있다,In addition, a cylinder head 21 is covered above the valve stopper 25, and a restricting protrusion 21a for regulating the position of the valve stopper 25 is formed on the lower surface of the cylinder head 21.

미설명 부호 24는 흡입밸브이다.Reference numeral 24 is a suction valve.

이와 같이 구성되는 본 발명의 작용을 설명한다.The operation of the present invention configured as described above will be described.

냉매가 흡입되어 압축된 다음에 토출되는 과정에서 토출밸브(23)를 개방시키면서 냉매가 토출공(22b)을 빠져나오게 되면, 토출밸브(23)는 냉매에 의하여 토출밸브 안착홈(22c)에서 벗어나 상측으로 움직여 토출공(22)이 개방된다.When the refrigerant exits the discharge hole 22b while opening the discharge valve 23 while the refrigerant is sucked, compressed and discharged, the discharge valve 23 is released from the discharge valve seating groove 22c by the refrigerant. The discharge hole 22 is opened by moving upward.

이처럼 상측으로 이동되는 토출밸브(23)는 밸브스토퍼(25)를 밀고 상측으로 올라가기 때문에 결과적으로 밸브스토퍼(25)가 중심부가 상측으로 이동된다.Since the discharge valve 23 moved upwards pushes the valve stopper 25 and rises upward, the valve stopper 25 is moved upward in the center.

토출밸브(23)에 의하여 상승되는 밸브스토퍼(25)는 실린더 헤드(21)의 규제돌부(21a)에 부딪혀 다시 하강되며, 이에 따라 토출밸브(23)는 토출밸브 안착홈(22c)으로 떨어지게 되어 토출공(22b)을 닫게 된다.The valve stopper 25 lifted by the discharge valve 23 is lowered again by hitting the restricting protrusion 21a of the cylinder head 21, whereby the discharge valve 23 falls into the discharge valve seating groove 22c. The discharge hole 22b is closed.

이와 같은 토출밸브(23)의 토출공(22b) 개폐작용이 무수하게 반복되면서 냉매의 토출 동작이 이루어지게 된다.As the opening and closing action of the discharge hole 22b of the discharge valve 23 is repeated innumerably, the discharge operation of the refrigerant is performed.

이때, 밸브스토퍼(25)는 상측에 복개되는 실린더 헤드(21)의 규제돌부(21a)에 의해 일정영역을 벗어나지 않고 토출밸브(23)의 개폐영역을 계속해서 제한하게 된다.At this time, the valve stopper 25 continues to limit the opening / closing area of the discharge valve 23 without deviating from a certain area by the restricting protrusion 21a of the cylinder head 21 covered on the upper side.

이상에서 설명한 바와 같이, 본 발명에 의한 밀폐형 압축기는 토출밸브를 상하로 이동가능하도록 설치하여 토출밸브의 어느 한 부분도 고정되는 부위가 없어지기 때문에 편마모 발생을 방지하여 토출밸브의 수명이 연장되는 효과가 있고, 이러한 토출밸브의 개폐영역을 제한하는 밸브스토퍼의 양단부가 지지된 상태이기 때문에 유동소음도 현저하게 저감되도록 한 것이다.As described above, the hermetic compressor according to the present invention is installed such that the discharge valve is movable up and down, so that any part of the discharge valve is not fixed, thereby preventing uneven wear and extending the life of the discharge valve. Since both ends of the valve stopper for limiting the opening and closing area of the discharge valve are supported, the flow noise is also significantly reduced.

또한, 별도의 밸브키퍼를 사용하지 않고 실린더 헤드에 규제돌부를 형성하여 밸브스토퍼의 위치를 규제하기 때문에 부품수가 줄어들어 제조원가가 절감되고, 작업생산성도 향상되는 효과가 있다.In addition, since the regulation protrusion is formed on the cylinder head to regulate the position of the valve stopper without using a separate valve keeper, the number of parts is reduced, thereby reducing manufacturing costs and improving work productivity.

그리고, 토출공의 상면에 안착홈을 형성하여 토출밸브를 안착시킨 상태이기 때문에 토출공의 체적이 감소되어 극간 체적이 줄어들게 됨으로써 냉동능력이 증가되는 효과도 있는 것이다.In addition, since the seating groove is formed on the upper surface of the discharge hole and the discharge valve is seated, the volume of the discharge hole is reduced to decrease the volume between the gaps, thereby increasing the freezing capacity.

Claims (2)

밸브 플레이트와 실린더 헤드 사이에 토출밸브가 개폐가능하게 설치되는 밀폐형 압축기에 있어서, 상기 밸브 플레이트의 토출공을 복개하도록 토출밸브를 위치시키고, 상기 토출공의 상면 외주연에는 토출밸브가 안착되는 토출밸브 안착홈이 형성되며, 상기 토출밸브의 상측에는 상기 토출밸브를 지지하는 지지돌부가 형성되어 토출밸브의 개폐영역을 제한하는 밸브스토퍼를 양단부가 고정되도록 설치하고, 상기 밸브스토퍼의 위치를 규제하는 규제돌부를 상기 실린더 헤드의 하면 소정 위치에 형성하여 구성한 것을 특징으로 하는 밀폐형 압축기.In a hermetic compressor in which a discharge valve is opened and closed between a valve plate and a cylinder head, a discharge valve is positioned to cover a discharge hole of the valve plate, and a discharge valve is seated at an outer circumference of the upper surface of the discharge hole. A seating groove is formed, and a support protrusion for supporting the discharge valve is formed on the upper side of the discharge valve, and a valve stopper for restricting the opening / closing area of the discharge valve is installed so that both ends thereof are fixed. A hermetic compressor comprising a protrusion formed at a lower surface of the cylinder head at a predetermined position. 제1항에 있어서, 상기 토출밸브의 상면에는 지지돌부가 고정되는 고정홈이 형성되는 것을 특징으로 하는 밀폐형 압축기.The hermetic compressor of claim 1, wherein a fixing groove is formed on the upper surface of the discharge valve to fix the support protrusion.
KR1019970052827A 1997-10-15 1997-10-15 Hermetic compressor KR100244380B1 (en)

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KR100244380B1 true KR100244380B1 (en) 2000-03-02

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