US20050207920A1 - Sealed type compressor - Google Patents

Sealed type compressor Download PDF

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Publication number
US20050207920A1
US20050207920A1 US10/509,748 US50974804A US2005207920A1 US 20050207920 A1 US20050207920 A1 US 20050207920A1 US 50974804 A US50974804 A US 50974804A US 2005207920 A1 US2005207920 A1 US 2005207920A1
Authority
US
United States
Prior art keywords
type compressor
resonance
hermetic type
flange
muffler
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
US10/509,748
Other languages
English (en)
Inventor
Terumasa Ide
Hidetoshi Nishihara
Masahiko Osaka
Tsuyoshi Matsumoto
Kazuhiko Ohno
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.)
Panasonic Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. reassignment MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IDE, TERUMASA, MATSUMOTO, TSUYOSHI, NISHIHARA, HIDETOSHI, OHNO, KAZUHIKO, OSAKA, MASAHIKO
Publication of US20050207920A1 publication Critical patent/US20050207920A1/en
Assigned to PANASONIC CORPORATION reassignment PANASONIC CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
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
    • 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
    • F04B39/0027—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
    • F04B39/0072—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes characterised by assembly or mounting

Definitions

  • the present invention relates to a hermetic type compressor mounted in a freezing, refrigerating or air conditioning apparatus such as a refrigerator, showcase and the like.
  • the suction pressure pulsation is attenuated by a silencer function configured on a suction muffler (e.g. refer to Japanese Laid-open Patent Application No. 2002-227766).
  • FIG. 5 is a sectional view of a conventional hermetic type compressor
  • FIG. 6 is an exploded view of an essential portion of the hermetic type compressor of FIG. 5 .
  • electric motor unit 2 and compressing unit 3 driven by it are housed in hermetic container 1 .
  • Cylinder 5 is disposed in cylinder block 4 which configures compressing unit 3 , and piston 6 is fitted in cylinder 5 in a state of being reciprocally movable.
  • Sheet-like plate 7 is formed with suction hole 8 and discharge hole 9 , which also seals the end of cylinder 5 .
  • Suction muffler 10 made of plastics comprises opening 11 formed in hermetic container 1 , silencing space 12 forming an expansion muffler, and connection pipe 13 which communicates the inside of silencing space 12 to suction hole 8 .
  • Cylinder head 18 is configured so as to cover the plate 7 , forming discharge chamber 19 formed with discharge hole 9 , housing section 20 for housing connection pipe 13 , and resonance chamber 22 which forms resonance space 21 .
  • Connection pipe 13 is provided with passage 15 which communicates with resonance chamber 22 , and a resonance muffler is formed by resonance chamber 22 and passage 15 .
  • compressor hermetic type compressor
  • Compressing unit 3 is driven by electric motor unit 2 , and piston 6 is reciprocally moved in cylinder 5 , then the refrigerant gas returned to hermetic container 1 from a freezing cycle (not shown) is taken into silencing space 12 from opening 11 of suction muffler 10 , which is taken into cylinder 5 via suction hole 8 passing through connection pipe 13 . And, the refrigerant gas compressed by the reciprocal motion of the piston is discharged from discharge hole 9 into discharge chamber 19 , and again delivered to the freezing cycle (not shown).
  • the refrigerant gas taken into cylinder 5 via suction hole 8 is intermittently inhaled as piston 6 is reciprocally moved in cylinder 5 , and it is therefore accompanied by pressure pulsation, but the pressure pulsation is attenuated due to the expansion muffler effect in silencing space 12 and the resonance muffler effect of resonance space 21 . As a result, the noise generated due to pressure pulsation can be lowered.
  • the suction pressure pulsation in resonance space 21 sometimes leaks from gaps between connection pipe 13 and housing section 20 , and in case the level of leaked pressure pulsation energy is high, there arises a problem that it will cause the inside of hermetic container 1 to be excited and the noise to be amplified.
  • This invention provides a hermetic type compressor comprising a hermetic container which accommodates stored oil, an electric motor unit, and a compressing unit, wherein the compressing unit comprises a cylinder for housing a reciprocally moving piston, a plate disposed at the end of the cylinder, a suction muffler having a connection pipe communicating to the suction hole in the plate, and a cylinder head disposed at the anti-cylinder side of the plate and formed with a discharge chamber and a resonance chamber which includes a part of the connection pipe, and a flange disposed at the outer periphery of the connection pipe is fitted in a groove formed at a position corresponding to the flange of the cylinder head, thereby forming a seal portion.
  • the compressing unit comprises a cylinder for housing a reciprocally moving piston, a plate disposed at the end of the cylinder, a suction muffler having a connection pipe communicating to the suction hole in the plate, and a cylinder head disposed at the anti-cylinder side of
  • FIG. 1 is a sectional view of a hermetic type compressor in the preferred embodiment 1 of the present invention.
  • FIG. 2 is an exploded perspective view of an essential portion of a hermetic type compressor in the preferred embodiment 1.
  • FIG. 3 is a perspective view of a suction muffler in the preferred embodiment 1.
  • FIG. 4 is an essential assembly diagram of the suction muffler of FIG. 2 in the preferred embodiment 1.
  • FIG. 5 is a sectional view of a conventional hermetic type compressor.
  • FIG. 6 is an exploded perspective view of an essential portion of a conventional hermetic type compressor.
  • FIG. 1 is a sectional view of a hermetic type compressor in the preferred embodiment 1 of the present invention.
  • FIG. 2 is an exploded perspective view of an essential portion of a hermetic type compressor in the preferred embodiment 1.
  • FIG. 3 is a perspective view of a suction muffler in the preferred embodiment 1.
  • FIG. 4 is an essential assembly diagram of the suction muffler of FIG. 2 in the preferred embodiment 1.
  • hermetic container 1 formed by drawing a steel plate in which electric motor unit 2 and compressing unit 103 driven by same are accommodated. Also, hermetic container 1 is formed with plane portion 1 A where a member (not shown) is installed for fitting the hermetic container 1 on a substrate (not shown) or the like.
  • Cylinder 5 is disposed in cylinder block 4 of compressing unit 103 , and piston 6 is fitted in cylinder 5 in such manner that it is freely reciprocally movable.
  • Sheet plate 7 has suction hole 8 and discharge hole 9 , and serves to seal the end of the cylinder.
  • Suction muffler 110 made of PBT (polybutylene terephthalate) resin enhanced in heat resistance, oil resistance and refrigerating capacity by mixing in glass fiber by about 15% comprises generally cubic opening 111 with one side opened in hermetic container 1 , silencing space 112 forming an expansion muffler, and connection pipe 113 which communicates the inside of silencing space 112 to suction hole 8 .
  • PBT polybutylene terephthalate
  • Opening end 114 of connection pipe 113 is provided with groove-like passage 115 which communicates between the inside and outside of opening end 114 and has a predetermined sectional area and length, and also formed with generally semi-circular ring-like seat 116 .
  • connection pipe 113 is formed with generally U-shaped flange 118 extended to the outer periphery side except the surface of opening end 114 side.
  • oil hole 119 is formed at the bottom of silencing space 112 that is located above flange 118 .
  • Cylinder head 123 is made of aluminum die-cast that is a relatively inexpensive material, which is configured so as to cover the plate 7 , and formed with housing section 125 where discharge chamber 124 having discharge hole 9 and connection pipe 113 are housed.
  • Housing section 125 is provided with generally semi-circular resonance chamber 128 formed in such manner that ring-like seat 116 is disposed along the inner wall, and generally U-shaped groove 129 is formed at a position corresponding to flange 118 , in which flange 118 is fitted with slight clearance.
  • flange 118 is fitted in groove 129 , thereby forming seal portion 130 .
  • plate 7 , the outer periphery of connection pipe 113 , the inner periphery of ring-like seat 116 , and the inner wall of resonance chamber 128 make up space 132 , and resonance muffler 140 is formed by space 132 and passage 115 .
  • cylinder head 123 is bolted to cylinder block 4 via plate 7 , and thereby, suction muffler 110 is press-fitted and secured on plate 7 by cylinder head 123 via spring 142 .
  • plane portion 1 A of hermetic container 1 has a resonance frequency of about 2.5 kHz, and the resonance frequency of opening 111 is set to about 1.6 kHz so that it does not coincide with the resonance frequency of plane portion 1 A.
  • resonance muffler 140 is tuned to nearly same resonance frequency as for opening 111 .
  • compressing unit 103 When power is supplied to electric motor unit 2 , compressing unit 103 is driven and piston 6 is reciprocally moved in the cylinder, then the refrigerant gas returned to hermetic container 1 from freezing cycle (not shown) is taken into silencing space 112 from opening 111 of suction muffler 110 , and it is taken into cylinder 5 from connection pipe 113 via suction hole 8 . And, the refrigerant gas compressed by the reciprocal motion of piston 6 is discharged from discharge hole 9 into discharge chamber 124 , and again delivered to the freezing cycle (not shown).
  • the refrigerant gas taken into cylinder 5 via suction hole 8 is intermittently inhaled as piston 6 is reciprocally moved in cylinder 5 , and it is therefore accompanied by strong pressure pulsation.
  • the pressure pulsation is greatly attenuated due to the effect of expansion muffler in silencing space 112 disposed in suction muffler 110 and the effect of resonance muffler 140 .
  • the pressure pulsation remaining in resonance muffler 140 is prevented from leaking into hermetic container 1 because resonance muffler 140 is isolated by seal portion 130 from the inside of hermetic container 1 , thereby preventing the vibration from being propagated to the refrigerant gas in hermetic container 1 .
  • the effective function of the expansion muffler and resonance muffler 140 enables the reduction of noise.
  • Seal portion 130 is formed by flange 118 and groove 129 engaging each other, and since the total distance from the upper and lower surface of flange 118 to the outer periphery corresponds to the effective length of seal width, it is possible to assure a sufficient seal width and to obtain an excellent sealing effect.
  • flange 118 is generally U-shaped, R of the shoulder of flange 118 allows it to be easily fitted in groove 129 , assuring excellent workability.
  • the refrigerant gas inhaled from opening 111 contains mist-like oil (not shown), and the oil is separated from the refrigerant gas in silencing space 112 .
  • the separated oil stays at the bottom of suction muffler 110 and drips from oil hole 119 onto seal portion 130 . Consequently, the oil gets into slight clearance created by seal portion 130 , thereby sealing it to improve the sealing effect remarkably, and there is almost no leakage of pressure pulsation remaining in resonance muffler 140 , and the effect of the expansion muffler and the effect of resonance muffler 140 are further enhanced, enabling the reduction of noise.
  • Resonance chamber 128 is formed in such manner that generally semi-circular ring-like seat 116 arcuately extended to the discharge chamber 124 side is disposed along the inner wall, and therefore, the volume of resonance chamber 128 can be maximized within a limited space without lessening the space volume of discharge chamber 124 .
  • the effect of resonance muffler 140 can be enhanced, and greater silencing effect can be obtained.
  • ring-like seat 116 disposed along the inner wall of resonance chamber 128 effectively regulates the rotational movement about the axis of connection pipe 113 .
  • suction muffler 110 when suction muffler 110 is press-fitted and secured on plate 7 , it is well seated, that is, suction muffler 110 is reliably fixed at a predetermined position. As a result, it is possible to prevent vibrant noise generated due to looseness between plate 7 and suction muffler 110 .
  • resonance muffler 140 is tuned to a resonance frequency of about 1.6 kHz nearly the same as for opening 111 , the resonance noise at opening 111 is remarkably attenuated. Consequently, it brings about an effect of greatly lowering the noise that is generated when the resonant portion of the hermetic container is excited by opening 111 being the source of excitation.
  • plane portion 1 A formed in hermetic container 1 is poor in rigidity, and as a result, if excited by the number of vibrations inherent to plane portion 1 A, the portion will be liable to resonate, giving rise to the generation of great noise.
  • the resonance frequency of opening 111 that is liable to become the source of excitation is not coincident with the number of vibrations inherent to plane portion 1 A, that is, they are independent of each other. Accordingly, the exciting force from opening 111 does not amplify the vibration of plane portion 1 A of hermetic container 1 that is most liable to resonate, and it is possible to suppress the generation of noise.
  • the noise may be sometimes greatly amplified depending upon the wavelength of noise passing therethrough.
  • the amplified noise can be attenuated by making the noise at the frequency coincident with the resonance frequency of resonance muffler 140 , and such means is also very effective to realize the reduction of noise.
  • the present invention relates to a hermetic type compressor mounted in a freezing, refrigerating or air conditioning apparatus such as a refrigerator, showcase and the like.
  • the resonance chamber is isolated from the inside of the hermetic container by the flange provided with a suction muffler and the seal portion having a groove disposed in the cylinder head, and the suction pressure pulsation hardly leaks into the hermetic container, thereby enabling the reduction of noise.

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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)
  • Applications Or Details Of Rotary Compressors (AREA)
US10/509,748 2003-03-27 2004-02-16 Sealed type compressor Abandoned US20050207920A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2003-088467 2003-03-27
JP2003088467A JP4492032B2 (ja) 2003-03-27 2003-03-27 密閉型圧縮機
PCT/JP2004/001608 WO2004085849A1 (fr) 2003-03-27 2004-02-16 Compresseur de type etanche

Publications (1)

Publication Number Publication Date
US20050207920A1 true US20050207920A1 (en) 2005-09-22

Family

ID=33095122

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/509,748 Abandoned US20050207920A1 (en) 2003-03-27 2004-02-16 Sealed type compressor

Country Status (8)

Country Link
US (1) US20050207920A1 (fr)
EP (1) EP1491767B1 (fr)
JP (1) JP4492032B2 (fr)
CN (1) CN100400869C (fr)
BR (1) BRPI0403929A (fr)
DE (1) DE602004005923T2 (fr)
MX (1) MXPA04009433A (fr)
WO (1) WO2004085849A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040120832A1 (en) * 2001-05-07 2004-06-24 Hidetoshi Nishihara Hermetic electric compressor
US20090285701A1 (en) * 2006-06-23 2009-11-19 Panasonic Corporation Hermetic type compressor

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4734901B2 (ja) 2004-11-22 2011-07-27 パナソニック株式会社 圧縮機
KR100831720B1 (ko) * 2004-12-06 2008-05-22 마쯔시다덴기산교 가부시키가이샤 밀폐형 압축기
JP4752255B2 (ja) * 2004-12-06 2011-08-17 パナソニック株式会社 密閉型圧縮機
FR2895037A1 (fr) * 2005-12-20 2007-06-22 Tecumseh Europ S A Sa Dispositif a clapets pour compresseur de fluide et compresseur de fluide
JP2007240948A (ja) * 2006-03-09 2007-09-20 Mitsubishi Electric Corp 騒音低減装置、送風機
KR101386477B1 (ko) * 2008-01-10 2014-04-18 엘지전자 주식회사 밀폐형 압축기의 소음 저감 장치
MX2022000556A (es) 2019-07-12 2022-04-18 Nidec Global Appliance Brasil Ltda Compresor reciprocante.

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109751A (en) * 1976-08-26 1978-08-29 Deere & Company Noise silencer
US4759693A (en) * 1986-07-09 1988-07-26 Danfoss A/S Suction sound damper
US4784581A (en) * 1987-01-12 1988-11-15 White Consolidated Industries, Inc. Compressor head and suction muffler for hermetic compressor
US5304044A (en) * 1990-03-06 1994-04-19 Matsushita Refrigeration Company Hermetic compressor
US5487648A (en) * 1993-11-12 1996-01-30 Necchi Compressori S.R.L. Shell configuration for a hermetic compressor
US5542824A (en) * 1994-04-29 1996-08-06 Samsung Electronics Co., Ltd. Refrigerant compressor having interconnected muffler section
US5577898A (en) * 1995-07-27 1996-11-26 Samsung Electronics Co., Ltd. Suction muffler arrangement for a hermetic reciprocating compressor
US5733106A (en) * 1995-07-29 1998-03-31 Samsung Electronics Co., Ltd. Suction muffler for a reciprocating compressor with external holes to reduce noise attenuation
US5749714A (en) * 1995-12-05 1998-05-12 Samsung Electronics Co., Ltd. Muffler for a reciprocating compressor
US5762478A (en) * 1995-03-07 1998-06-09 Samsung Electronics Co., Ltd. Cylinder head structure of a reciprocating compressor and method of attaching a capillary tube to the cylinder head structure
US5769613A (en) * 1995-07-29 1998-06-23 Samsung Electronics Co., Ltd. Compressor muffler having sections interconnected by an elastic retainer
US5908287A (en) * 1995-11-15 1999-06-01 Lg Electronics Inc. Suction noise muffler mounting apparatus for hermetic compressor
US5971720A (en) * 1996-08-21 1999-10-26 Empresa Brasileira De Compressores Suction muffler for a hermetic compressor
US6017197A (en) * 1995-06-23 2000-01-25 Danfoss Compressors Gmbh Suction sound damper for a refrigerant compressor
US6149402A (en) * 1996-09-17 2000-11-21 Samsung Kwang-Ju Electronics, Co., Ltd. Suction muffler for hermetic reciprocating compressor
US6358019B1 (en) * 1999-05-22 2002-03-19 Danfoss Compressors Gmbh Suction sound damper for a hermetically encapsulated compressor
US6402484B1 (en) * 1999-04-09 2002-06-11 Danfoss Compressors Gmbh Refrigerant compressor and method for assembling
US6464480B2 (en) * 2001-03-16 2002-10-15 Scroll Technologies Oil spout for scroll compressor
US6641374B2 (en) * 2000-12-06 2003-11-04 Lg Electronics Inc Cylinder head cover structure of hermetic motor-driving type compressor
US20040052653A1 (en) * 2000-11-29 2004-03-18 Akihiko Kubota Hermetic compressor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4971368A (en) * 1990-01-17 1990-11-20 The Devilbiss Company Seal for connecting a tube to a housing member and method for forming same
JPH1047253A (ja) * 1996-07-31 1998-02-17 Matsushita Refrig Co Ltd 密閉型電動圧縮機
JP3516879B2 (ja) * 1999-03-25 2004-04-05 松下冷機株式会社 密閉型圧縮機

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109751A (en) * 1976-08-26 1978-08-29 Deere & Company Noise silencer
US4759693A (en) * 1986-07-09 1988-07-26 Danfoss A/S Suction sound damper
US4784581A (en) * 1987-01-12 1988-11-15 White Consolidated Industries, Inc. Compressor head and suction muffler for hermetic compressor
US5304044A (en) * 1990-03-06 1994-04-19 Matsushita Refrigeration Company Hermetic compressor
US5487648A (en) * 1993-11-12 1996-01-30 Necchi Compressori S.R.L. Shell configuration for a hermetic compressor
US5542824A (en) * 1994-04-29 1996-08-06 Samsung Electronics Co., Ltd. Refrigerant compressor having interconnected muffler section
US5950307A (en) * 1995-03-07 1999-09-14 Samsung Electronics Co., Ltd. Method of attaching a capillary tube to a muffler of a reciprocating compressor
US5762478A (en) * 1995-03-07 1998-06-09 Samsung Electronics Co., Ltd. Cylinder head structure of a reciprocating compressor and method of attaching a capillary tube to the cylinder head structure
US6017197A (en) * 1995-06-23 2000-01-25 Danfoss Compressors Gmbh Suction sound damper for a refrigerant compressor
US5577898A (en) * 1995-07-27 1996-11-26 Samsung Electronics Co., Ltd. Suction muffler arrangement for a hermetic reciprocating compressor
US5769613A (en) * 1995-07-29 1998-06-23 Samsung Electronics Co., Ltd. Compressor muffler having sections interconnected by an elastic retainer
US5733106A (en) * 1995-07-29 1998-03-31 Samsung Electronics Co., Ltd. Suction muffler for a reciprocating compressor with external holes to reduce noise attenuation
US5908287A (en) * 1995-11-15 1999-06-01 Lg Electronics Inc. Suction noise muffler mounting apparatus for hermetic compressor
US5749714A (en) * 1995-12-05 1998-05-12 Samsung Electronics Co., Ltd. Muffler for a reciprocating compressor
US5971720A (en) * 1996-08-21 1999-10-26 Empresa Brasileira De Compressores Suction muffler for a hermetic compressor
US6149402A (en) * 1996-09-17 2000-11-21 Samsung Kwang-Ju Electronics, Co., Ltd. Suction muffler for hermetic reciprocating compressor
US6402484B1 (en) * 1999-04-09 2002-06-11 Danfoss Compressors Gmbh Refrigerant compressor and method for assembling
US6358019B1 (en) * 1999-05-22 2002-03-19 Danfoss Compressors Gmbh Suction sound damper for a hermetically encapsulated compressor
US20040052653A1 (en) * 2000-11-29 2004-03-18 Akihiko Kubota Hermetic compressor
US6641374B2 (en) * 2000-12-06 2003-11-04 Lg Electronics Inc Cylinder head cover structure of hermetic motor-driving type compressor
US6464480B2 (en) * 2001-03-16 2002-10-15 Scroll Technologies Oil spout for scroll compressor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040120832A1 (en) * 2001-05-07 2004-06-24 Hidetoshi Nishihara Hermetic electric compressor
US7134847B2 (en) * 2001-05-07 2006-11-14 Matsushita Refrigeration Company Hermetic electric compressor having a suction muffler
US20090285701A1 (en) * 2006-06-23 2009-11-19 Panasonic Corporation Hermetic type compressor

Also Published As

Publication number Publication date
CN100400869C (zh) 2008-07-09
EP1491767A4 (fr) 2006-01-18
EP1491767B1 (fr) 2007-04-18
CN1697931A (zh) 2005-11-16
BRPI0403929A (pt) 2005-01-04
EP1491767A1 (fr) 2004-12-29
DE602004005923T2 (de) 2008-01-17
WO2004085849A1 (fr) 2004-10-07
JP2004293464A (ja) 2004-10-21
MXPA04009433A (es) 2005-01-25
JP4492032B2 (ja) 2010-06-30
DE602004005923D1 (de) 2007-05-31

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AS Assignment

Owner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:IDE, TERUMASA;NISHIHARA, HIDETOSHI;OSAKA, MASAHIKO;AND OTHERS;REEL/FRAME:016619/0186

Effective date: 20040820

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Owner name: PANASONIC CORPORATION, JAPAN

Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;REEL/FRAME:021738/0878

Effective date: 20081001

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STCB Information on status: application discontinuation

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