KR20030085162A - Suction muffler for hermetic compressor - Google Patents

Suction muffler for hermetic compressor Download PDF

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Publication number
KR20030085162A
KR20030085162A KR1020020023320A KR20020023320A KR20030085162A KR 20030085162 A KR20030085162 A KR 20030085162A KR 1020020023320 A KR1020020023320 A KR 1020020023320A KR 20020023320 A KR20020023320 A KR 20020023320A KR 20030085162 A KR20030085162 A KR 20030085162A
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KR
South Korea
Prior art keywords
muffler
suction
muffler body
cover
hermetic compressor
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KR1020020023320A
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Korean (ko)
Inventor
윤용태
Original Assignee
삼성광주전자 주식회사
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Priority to KR1020020023320A priority Critical patent/KR20030085162A/en
Publication of KR20030085162A publication Critical patent/KR20030085162A/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
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • 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
    • 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
    • F04B39/14—Provisions for readily assembling or disassembling

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

Abstract

PURPOSE: A suction muffler for a hermetic compressor is provided to improve hermeticity of the suction muffler. CONSTITUTION: A suction muffler includes a muffler body having one side opened and a coupling groove(54); and a muffler cover having a coupling member(55) inserted to the coupling groove, and installed to cover the opening side of the muffler body. The coupling member has a protrusion part(57) formed on one end thereof. A groove part(58) is formed on one side of an inside of the muffler body correspondingly with the protrusion part of the coupling member. The protrusion part of the coupling member placed on the muffler cover contacts with the one side of the inside of the muffler body to improve hermeticity of the suction muffler, and to prevent leakage of noise out of the suction muffler as the coupling member and the muffler body are not easily separated from each other even if the muffler cover or the muffler body is deformed. The groove part is formed on one side of a baffle(53) installed on the inside of the muffler body. The protrusion part is formed in triangular shape.

Description

밀폐형 압축기용 흡입 머플러{Suction muffler for hermetic compressor}Suction muffler for hermetic compressor

본 발명은 밀폐형 압축기에 관한 것으로서, 보다 상세하게는 밀폐형 압축기용 흡입 머플러에 관한 것이다.The present invention relates to a hermetic compressor, and more particularly to a suction muffler for hermetic compressor.

도 1 또는 2에 도시된 바와 같이, 일반적인 밀폐형 압축기는, 상부 및 하부 케이싱(11)(12)으로 구성된 밀폐 케이싱(10)과, 밀폐 케이싱(10) 내부에 설치된 전동 기구부(20) 및 압축 기구부(30)를 포함한다.As shown in FIG. 1 or 2, a general hermetic compressor includes a hermetic casing 10 composed of upper and lower casings 11 and 12, a power mechanism part 20 and a compression mechanism part provided inside the hermetic casing 10. As shown in FIG. (30).

상기 전동 기구부(20)는 밀폐 케이싱(10) 내에 고정된 고정자(21)와, 고정자(21)의 내부에 삽입되어 회전되는 회전자(22) 및 회전자(22)의 중앙에 압입된 크랭크 샤프트(23)를 포함한다. 크랭크 샤프트(23)는 그 일단에 편심부(24)를 갖는다.The power mechanism 20 includes a stator 21 fixed in the closed casing 10, a rotor 22 inserted into the stator 21 and rotated, and a crank shaft pressed into the center of the rotor 22. And (23). The crankshaft 23 has an eccentric 24 at one end thereof.

상기 압축 기구부(30)는 상기 크랭크 샤프트(23)의 편심부(24)에 결합되어 크랭크 샤프트(23)의 회전운동을 직선왕복운동으로 바꾸어 주는 커넥팅 로드(31)와, 커넥팅 로드(31)의 일단에 결합된 피스톤(32)과, 피스톤(32)이 삽입되어 직선왕복운동을 하는 실린더(33)가 형성된 실린더 블록(34)과, 실린더(33)의 개방부에 설치된 실린더 헤드(35) 및 실린더(33)와 실린더 헤드(35) 사이에 개재되어 냉매를 실린더(33)의 내부로 흡입함과 아울러 압축 냉매를 토출시키는 밸브 조립체(36)를 포함한다.The compression mechanism part 30 is coupled to the eccentric portion 24 of the crankshaft 23 and the connecting rod 31 for converting the rotational movement of the crankshaft 23 into a linear reciprocating motion of the connecting rod 31 A cylinder block 34 having a piston 32 coupled to one end, a cylinder 33 into which the piston 32 is inserted to perform a linear reciprocating motion, a cylinder head 35 provided at an opening of the cylinder 33, and A valve assembly 36 is interposed between the cylinder 33 and the cylinder head 35 to suck the refrigerant into the cylinder 33 and discharge the compressed refrigerant.

상기 실린더 헤드(35)의 상부에는 흡입 머플러(40)가 설치되어 압축기의 외부로부터 흡입되는 냉매에 의해 발생되는 흡입 소음을 감소시킨다. 이 흡입 머플러(40)에는 냉매를 흡입하기 위한 흡입관(50)이 연결된다. 또한, 흡입 머플러(40)와 실린더 헤드(35)는 연결관(37)으로 연통된다.A suction muffler 40 is installed on the upper portion of the cylinder head 35 to reduce suction noise generated by the refrigerant sucked from the outside of the compressor. The suction muffler 40 is connected to a suction pipe 50 for sucking the refrigerant. In addition, the suction muffler 40 and the cylinder head 35 communicate with the connecting pipe 37.

상기와 같은 종래의 밀폐형 압축기는 흡입관(50)을 통하여 흡입된 냉매가 연결관(37)을 통해 흡입 머플러(40)를 지나 실린더 헤드(35) 및 밸브 조립체(36)를 통과한 후 실린더(33)의 내부로 유입된 후 피스톤(32)의 직선왕복운동에 의하여 압축된다.In the conventional hermetic compressor as described above, the refrigerant sucked through the suction pipe 50 passes through the cylinder head 35 and the valve assembly 36 after passing through the suction muffler 40 through the connection pipe 37 and then the cylinder 33. After entering the inside of the) is compressed by the linear reciprocating motion of the piston (32).

도 3 내지 도 4b는 종래의 밀폐형 압축기용 흡입 머플러(40)를 나타낸 것이다.3 to 4b show a suction muffler 40 for a conventional hermetic compressor.

도시된 바와 같이, 종래의 밀폐형 압축기용 흡입 머플러(40)는 머플러 몸체(41)와, 머플러 커버(42)로 이루어지며, 머플러 몸체(41)의 내부에는 배플(43)이 설치된다.As illustrated, the conventional hermetic compressor suction muffler 40 is composed of a muffler body 41 and a muffler cover 42, and a baffle 43 is installed inside the muffler body 41.

상기 머플러 몸체(41)의 일측에는 체결홈(44)이 형성되고, 상기 머플러 커버(42)는 체결홈(44)에 대응되는 체결부재(45)를 갖는다. 따라서, 흡입 머플러(40) 조립시에 머플러 커버(42)를 머플러 몸체(41)의 개방부에 대고 가압하여 흡입 머플러(40)의 체결부재(45)가 머플러 몸체(41)의 체결홈(44)에 삽입되도록 함으로써 머플러 몸체(41)와 머플러 커버(42)를 결합시킨다. 이때, 체결부재(45)의 일단면은 머플러 몸체(41) 내부에 설치된 배플(43)의 일면과 밀착된다.A fastening groove 44 is formed at one side of the muffler body 41, and the muffler cover 42 has a fastening member 45 corresponding to the fastening groove 44. Therefore, when assembling the suction muffler 40, the muffler cover 42 is pressed against the opening of the muffler body 41 so that the fastening member 45 of the suction muffler 40 is fastened to the fastening groove 44 of the muffler body 41. By coupling to the muffler body 41 and the muffler cover 42 is coupled. At this time, one end surface of the fastening member 45 is in close contact with one surface of the baffle 43 installed inside the muffler body 41.

그러나, 상기와 같은 종래의 밀폐형 압축기용 흡입 머플러는, 체결부재(45)와 배플(43) 사이의 밀착력이 약하여 흡입 머플러의 밀폐성이 떨어진다.However, in the conventional hermetic compressor suction muffler as described above, the adhesion between the fastening member 45 and the baffle 43 is weak and the sealing muffler is inferior.

또한, 머플러 몸체(41) 및 머플러 커버(42)가 PBT수지로 사출 성형된 것으로 외부 충격 및 열에 의한 변형이 크기 때문에, 압축기 구동시 발생되는 열에 의해 체결부재(45)와 배플(43) 사이의 접촉면이 쉽게 떨어질 수 있다. 따라서, 머플러몸체(41)의 체결홈(44)과 체결부재(45) 사이에 틈이 발생하여 소음이 발생되는 문제점이 있다.In addition, since the muffler body 41 and the muffler cover 42 are injection-molded with PBT resin and have a large deformation due to external impact and heat, the coupling member 45 and the baffle 43 may be separated by heat generated when the compressor is driven. The contact surface can fall off easily. Therefore, a gap is generated between the fastening groove 44 and the fastening member 45 of the muffler body 41, which causes noise.

본 발명은 상기와 같은 문제점을 감안하여 안출된 것으로서, 흡입 머플러의 밀폐성을 향상시키고, 흡입 머플러 외부로 소음이 새어 나가지 않도록 그 결합 구조가 개선된 밀폐형 압축기용 흡입 머플러를 제공하는데 그 목적이 있다.The present invention has been made in view of the above problems, and an object of the present invention is to provide a suction muffler for a hermetic compressor having improved coupling structure to improve the sealability of the suction muffler and to prevent noise from leaking out of the suction muffler.

도 1은 일반적인 밀폐형 압축기를 개략적으로 나타낸 단면도,1 is a cross-sectional view schematically showing a general hermetic compressor,

도 2는 도 1의 요부를 발췌하여 개략적으로 나타낸 정면도,FIG. 2 is a front view schematically showing the main portion of FIG. 1;

도 3은 도 2의 흡입 머플러를 발췌하여 개략적으로 나타낸 정면도,Figure 3 is a front view schematically showing an extract of the suction muffler of Figure 2,

도 4a 및 4b는 도 3의 흡입 머플러의 I-I선을 따라 취한 단면도 및 일부 확대단면도, 그리고,Figures 4a and 4b is a cross-sectional view taken along line I-I of the suction muffler of Figure 3 and some enlarged cross-sectional view, and

도 5a 및 5b는 본 발명의 바람직한 실시예에 따른 밀폐형 압축기용 흡입 머플러의 단면도 및 일부 확대단면도이다.5A and 5B are a cross-sectional view and a partially enlarged cross-sectional view of a suction muffler for a hermetic compressor according to a preferred embodiment of the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

50;흡입 머플러51;머플러 몸체50; suction muffler 51; muffler body

52;머플러 커버53;배플52; muffler cover 53; baffle

54;체결홈55;체결부재54; fastening groove 55; fastening member

56;연통공57;돌기부56; communication hole 57; protrusion

58;홈부58; groove

상기 목적을 달성하기 위한 본 발명에 의한 밀폐형 압축기용 흡입 머플러는, 일측이 개방되고 체결홈을 갖는 머플러 몸체; 상기 체결홈에 삽입되는 체결부재를 구비하고, 상기 머플러 몸체의 개방부를 덮도록 설치되는 머플러 커버;를 포함하며, 상기 체결부재는 일측단으로 돌기부가 형성되고, 상기 머플러 몸체 내부의 일측에는 상기 돌기부에 대응되는 홈부가 형성된 것을 특징으로 한다.Suction muffler for hermetic compressor according to the present invention for achieving the above object, the muffler body having one side is open and a fastening groove; And a muffler cover having a fastening member inserted into the fastening groove and installed to cover the opening of the muffler body, wherein the fastening member has a protrusion formed at one end thereof, and the protrusion is formed at one side of the muffler body. It characterized in that the groove portion corresponding to the formed.

이에 의하면, 머플러 커버에 구비된 체결부재의 돌기부가 머플러 몸체 내부의 일측과 요철 형태로 접하기 때문에 흡입 머플러의 밀폐성이 향상되고, 머플러 커버 또는 머플러 몸체에 변형이 발생되어도 체결부재와 머플러 몸체 사이의 접촉이 쉽게 떨어지지 않아 흡입 머플러 외부로 소음이 새어 나가는 것을 방지할 수 있다.According to this, since the protrusion of the fastening member provided in the muffler cover is in contact with one side of the inside of the muffler body in the form of irregularities, the sealing property of the suction muffler is improved, and even if the muffler cover or the muffler body is deformed, between the fastening member and the muffler body The contact does not drop easily, preventing noise from leaking out of the suction muffler.

여기서, 상기 홈부는 상기 머플러 몸체의 내부에 설치된 배플의 일측에 형성된 것이 바람직하고, 상기 돌기부는 실질적으로 삼각 형상으로 된 것이 좋다.Here, the groove portion is preferably formed on one side of the baffle provided inside the muffler body, it is preferable that the projection portion is substantially triangular shape.

이하, 첨부된 도면을 참조하여 본 발명에 의한 밀폐형 압축기용 흡입 머플러의 바람직한 실시예에 대하여 상세하게 설명한다. 본 발명에 의한 밀폐형 압축기용 흡입 머플러는 일부 구성을 제외하고 종래의 흡입 머플러와 유사하다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the suction muffler for hermetic compressor according to the present invention. The suction muffler for the hermetic compressor according to the present invention is similar to the conventional suction muffler except for some configurations.

도 5a 또는 5b에 나타난 바와 같이, 본 발명의 바람직한 실시예에 따른 밀폐형 압축기의 흡입 머플러(50)는, 머플러 몸체(51)와, 머플러 커버(52)와, 배플(53)을 포함한다.As shown in FIG. 5A or 5B, the suction muffler 50 of the hermetic compressor according to the preferred embodiment of the present invention includes a muffler body 51, a muffler cover 52, and a baffle 53.

상기 머플러 몸체(51)는 흡입관(50; 도 2참조) 및 연결관(37; 도 2참조)과 연통된다. 압축기 외부의 냉매는 흡입관(50)을 통해 머플러 몸체(51) 내로 유입된 후, 연결관(37)을 통해 실린더 헤드(35; 도 2참조)의 냉매 흡입실로 이동된다. 또한, 머플러 몸체(51)의 일측면에는 체결홈(54)이 형성된다.The muffler body 51 is in communication with a suction tube 50 (see FIG. 2) and a connecting tube 37 (see FIG. 2). The refrigerant outside the compressor flows into the muffler body 51 through the suction pipe 50 and then moves to the refrigerant suction chamber of the cylinder head 35 (see FIG. 2) through the connection pipe 37. In addition, a fastening groove 54 is formed on one side of the muffler body 51.

상기 머플러 커버(52)는 머플러 몸체(51)의 개방부를 덮도록 설치된다. 또한, 머플러 커버(52)는 상기 머플러 몸체(51)의 체결홈(54)에 대응되는 체결부재(55)를 갖는다.The muffler cover 52 is installed to cover the opening of the muffler body 51. In addition, the muffler cover 52 has a fastening member 55 corresponding to the fastening groove 54 of the muffler body 51.

상기 배플(53)은 머플러 몸체(51)와 머플러 커버(52) 사이에 개재된다. 배플(53)은 머플러 커버(52) 측의 공간부와 머플러 몸체(51) 측의 공간부를 구획한다. 상기 두 공간부는 배플(53)에 형성된 연통공(56)에 의해 연통된다.The baffle 53 is interposed between the muffler body 51 and the muffler cover 52. The baffle 53 partitions the space portion on the muffler cover 52 side and the space portion on the muffler body 51 side. The two spaces are communicated by the communication hole 56 formed in the baffle 53.

상기 구성을 갖는 밀폐형 압축기용 흡입 머플러(50)는, 머플러 몸체(51)의 개방부에 머플러 커버(52)가 대응되도록 위치된 후 가압됨으로써 조립이 이루어진다. 즉, 체결부재(55)가 머플러 몸체(51)의 내벽면을 따라 슬라이딩되다가 체결홈(54)에 삽입됨으로써 머플러 몸체(51)와 머플러 커버(52)가 결합된다.The suction muffler 50 for a hermetic compressor having the above configuration is assembled by being pressurized after the muffler cover 52 is positioned to correspond to the opening of the muffler body 51. That is, the fastening member 55 slides along the inner wall surface of the muffler body 51 and is inserted into the fastening groove 54 so that the muffler body 51 and the muffler cover 52 are coupled to each other.

또한, 체결부재(55)의 일측단에는 돌기부(57)가 형성되고 배플(53)의 일측에는 돌기부(57)에 대응되는 홈부(58)가 형성되어 체결부재(55)가 체결홈(54)에 삽입될 때, 돌기부(57)와 홈부(58)가 요철 형태로 밀착된다. 따라서, 머플러 몸체(51) 또는 머플러 커버(52)가 변형되어도 체결부재(55)와 홈부(58)의 접촉이 쉽게 떨어지지 않는다. 여기서, 돌기부(57)는 대략 삼각 형상을 갖는 것이 좋으나, 이에 한정되는 것은 아니고 다양한 형상으로 형성될 수 있다.In addition, a protrusion 57 is formed at one end of the fastening member 55, and a groove 58 corresponding to the protrusion 57 is formed at one side of the baffle 53 so that the fastening member 55 is the fastening groove 54. When inserted in the projection 57 and the groove 58 is in close contact with the irregular shape. Therefore, even if the muffler body 51 or the muffler cover 52 is deformed, the contact between the fastening member 55 and the groove portion 58 does not fall easily. Here, the protrusion 57 may have a substantially triangular shape, but is not limited thereto and may be formed in various shapes.

한편, 본 실시예에서는 돌기부(57)에 대응되는 홈부(58)가 배플(53)에 형성된 것으로 도시되어 있으나, 홈부(58)의 형성 위치는 이에 한정되는 것은 아니다. 즉, 머플러 몸체(51)와 머플러 커버(52)의 결합시 체결부재(55)의 돌기부(57)와 대응될 수 있다면 머플러 몸체(51)의 일측 등 머플러 몸체(51) 내부의 어느 곳에든 형성될 수 있다.Meanwhile, in the present exemplary embodiment, the groove 58 corresponding to the protrusion 57 is illustrated as being formed in the baffle 53, but the position at which the groove 58 is formed is not limited thereto. That is, if the muffler body 51 and the muffler cover 52 may be coupled to the protrusions 57 of the fastening member 55, the muffler body 51 may be formed anywhere in the muffler body 51 such as one side of the muffler body 51. Can be.

이상에서 설명한 바와 같은 본 발명에 의하면, 머플러 몸체의 체결홈에 머플러 커버의 체결부재가 삽입될 때, 체결부재에 형성된 돌기부와 머플러 몸체의 일측에 형성된 홈부가 요철 형태로 밀착되기 때문에 흡입 머플러의 밀폐성이 향상된다.According to the present invention as described above, when the fastening member of the muffler cover is inserted into the fastening groove of the muffler body, the protrusion formed on the fastening member and the groove formed on one side of the muffler body are in close contact with the concave-convex shape so that the suction muffler is sealed. This is improved.

또한, 압축기가 구동되어 발생되는 열에 의해 머플러 몸체 또는 머플러 커버가 변형되어도 체결부재와 머플러 몸체의 접촉부가 쉽게 떨어지지 않아 흡입 머플러 외부로 소음이 새어 나가는 것을 방지할 수 있는 효과가 있다.In addition, even if the muffler body or the muffler cover is deformed by the heat generated by driving the compressor, the contact between the fastening member and the muffler body is not easily dropped, thereby preventing noise from leaking out of the suction muffler.

이상, 본 발명을 본 발명의 원리를 예시하기 위한 바람직한 실시예에 대하여 도시하고 설명하였으나, 본 발명은 그와 같이 도시되고 설명된 그대로의 구성 및 작용으로 한정되는 것이 아니다. 오히려, 첨부된 특허청구범위의 사상 및 범주를일탈함이 없이 본 발명에 대한 다수의 변경 및 수정이 가능함을 당업자들은 잘 이해할 수 있을 것이다. 따라서, 그러한 모든 적절한 변경 및 수정과 균등물들도 본 발명의 범위에 속하는 것으로 간주되어야 할 것이다.While the invention has been shown and described with respect to preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (3)

일측이 개방되고 체결홈을 갖는 머플러 몸체;A muffler body having one side open and a fastening groove; 상기 체결홈에 삽입되는 체결부재를 구비하고, 상기 머플러 몸체의 개방부를 덮도록 설치되는 머플러 커버;를 포함하며,And a muffler cover having a fastening member inserted into the fastening groove and installed to cover the opening of the muffler body. 상기 체결부재는 일측단으로 돌기부가 형성되고, 상기 머플러 몸체 내부의 일측에는 상기 돌기부에 대응되는 홈부가 형성된 것을 특징으로 하는 밀폐형 압축기용 흡입 머플러.The fastening member has a protrusion formed at one side end, and a suction part muffler for a hermetic compressor, characterized in that a groove corresponding to the protrusion is formed at one side of the muffler body. 제 1 항에 있어서,The method of claim 1, 상기 홈부는 상기 머플러 몸체의 내부에 설치된 배플의 일측에 형성된 것을 특징으로 하는 밀폐형 압축기용 흡입 머플러.Said groove portion is a suction muffler for a hermetic compressor, characterized in that formed on one side of the baffle provided inside the muffler body. 제 1 항에 있어서,The method of claim 1, 상기 돌기부는 실질적으로 삼각 형상으로 된 것을 특징으로 하는 밀폐형 압축기용 흡입 머플러.The projection muffler for a hermetic compressor, characterized in that the substantially triangular shape.
KR1020020023320A 2002-04-29 2002-04-29 Suction muffler for hermetic compressor KR20030085162A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957324B1 (en) * 2004-09-15 2010-05-12 현대자동차주식회사 Structure for decreasing noise in air-conditioner for automobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957324B1 (en) * 2004-09-15 2010-05-12 현대자동차주식회사 Structure for decreasing noise in air-conditioner for automobile

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