EP1491767B1 - Sealed type compressor - Google Patents
Sealed type compressor Download PDFInfo
- Publication number
- EP1491767B1 EP1491767B1 EP04711475A EP04711475A EP1491767B1 EP 1491767 B1 EP1491767 B1 EP 1491767B1 EP 04711475 A EP04711475 A EP 04711475A EP 04711475 A EP04711475 A EP 04711475A EP 1491767 B1 EP1491767 B1 EP 1491767B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- type compressor
- resonance
- hermetic type
- muffler
- cylinder
- 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.)
- Expired - Lifetime
Links
- 230000000694 effects Effects 0.000 description 11
- 230000010349 pulsation Effects 0.000 description 11
- 239000003507 refrigerant Substances 0.000 description 11
- 230000030279 gene silencing Effects 0.000 description 10
- 230000008014 freezing Effects 0.000 description 7
- 238000007710 freezing Methods 0.000 description 7
- 230000002238 attenuated effect Effects 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
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.
- JP-A-2002 227766 discloses the pre-characterizing features of the present invention. Reference may also be made to US-A-4759693 and JP-A-4214972.
- 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.
- 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 1A 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. Further, 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. Also, 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 1A 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 1A.
- 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.
- 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. As a result, the effect of resonance muffler 140 can be enhanced, and greater silencing effect can be obtained. At the same time, 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 1A formed in hermetic container 1 is poor in rigidity, and as a result, if excited by the number of vibrations inherent to plane portion 1A, 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 1A, that is, they are independent of each other. Accordingly, the exciting force from opening 111 does not amplify the vibration of plane portion 1A 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)
Description
- 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.
- With recent increase in prevalence of low-noise type household refrigerators, there is a strong demand for noise reduction of a hermetic type compressor.
- In some of conventional hermetic type compressors, 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).
- The conventional hermetic type compressor will be described in the following with reference to the drawings.
- Fig. 5 is a sectional view of a conventional hermetic type compressor, and Fig. 6 is an exploded view of an essential portion of the hermetic type compressor of Fig. 5.
- In Fig. 5 and Fig. 6,
electric motor unit 2 and compressingunit 3 driven by it are housed in hermetic container 1. -
Cylinder 5 is disposed incylinder block 4 which configurescompressing unit 3, andpiston 6 is fitted incylinder 5 in a state of being reciprocally movable. Sheet-like plate 7 is formed withsuction hole 8 anddischarge hole 9, which also seals the end ofcylinder 5.Suction muffler 10 made of plastics comprises opening 11 formed in hermetic container 1, silencingspace 12 forming an expansion muffler, andconnection pipe 13 which communicates the inside of silencingspace 12 tosuction hole 8. -
Cylinder head 18 is configured so as to cover theplate 7, formingdischarge chamber 19 formed withdischarge hole 9,housing section 20 forhousing connection pipe 13, andresonance chamber 22 which formsresonance space 21. -
Connection pipe 13 is provided withpassage 15 which communicates withresonance chamber 22, and a resonance muffler is formed byresonance chamber 22 andpassage 15. - The operation of a hermetic type compressor (hereafter called compressor) configured as described above will be described in the following.
- Compressing
unit 3 is driven byelectric motor unit 2, andpiston 6 is reciprocally moved incylinder 5, then the refrigerant gas returned to hermetic container 1 from a freezing cycle (not shown) is taken intosilencing space 12 from opening 11 ofsuction muffler 10, which is taken intocylinder 5 viasuction hole 8 passing throughconnection pipe 13. And, the refrigerant gas compressed by the reciprocal motion of the piston is discharged fromdischarge hole 9 intodischarge chamber 19, and again delivered to the freezing cycle (not shown). - In this case, the refrigerant gas taken into
cylinder 5 viasuction hole 8 is intermittently inhaled aspiston 6 is reciprocally moved incylinder 5, and it is therefore accompanied by pressure pulsation, but the pressure pulsation is attenuated due to the expansion muffler effect insilencing space 12 and the resonance muffler effect ofresonance space 21. As a result, the noise generated due to pressure pulsation can be lowered. - However, in the above conventional configuration, the suction pressure pulsation in
resonance space 21 sometimes leaks from gaps betweenconnection pipe 13 andhousing 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. - Reference may be made to JP-A-2002 227766 which discloses the pre-characterizing features of the present invention. Reference may also be made to US-A-4759693 and JP-A-4214972.
- 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.
-
- 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.
- The preferred embodiments of the present invention will be described in the following with reference to the drawings. Same components as those in the conventional example are given same reference numerals, and the detailed description is omitted.
- 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.
- In Fig. 1 to Fig. 4,
oil 101 and refrigerant gas (not shown) are sealed in hermetic container 1 formed by drawing a steel plate in whichelectric motor unit 2 and compressingunit 103 driven by same are accommodated. Also, hermetic container 1 is formed withplane portion 1A 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 incylinder block 4 of compressingunit 103, andpiston 6 is fitted incylinder 5 in such manner that it is freely reciprocally movable. -
Sheet plate 7 hassuction hole 8 anddischarge 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 generallycubic opening 111 with one side opened in hermetic container 1,silencing space 112 forming an expansion muffler, andconnection pipe 113 which communicates the inside ofsilencing space 112 tosuction hole 8. - Opening
end 114 ofconnection pipe 113 is provided with groove-like passage 115 which communicates between the inside and outside of openingend 114 and has a predetermined sectional area and length, and also formed with generally semi-circular ring-like seat 116. Further,connection pipe 113 is formed with generally U-shapedflange 118 extended to the outer periphery side except the surface ofopening end 114 side. Also,oil hole 119 is formed at the bottom ofsilencing space 112 that is located aboveflange 118. -
Cylinder head 123 is made of aluminum die-cast that is a relatively inexpensive material, which is configured so as to cover theplate 7, and formed withhousing section 125 wheredischarge chamber 124 havingdischarge hole 9 andconnection pipe 113 are housed. -
Housing section 125 is provided with generallysemi-circular resonance chamber 128 formed in such manner that ring-like seat 116 is disposed along the inner wall, and generally U-shapedgroove 129 is formed at a position corresponding toflange 118, in whichflange 118 is fitted with slight clearance. - With
suction muffler 110 andcylinder head 123 engaged with each other,flange 118 is fitted ingroove 129, thereby formingseal portion 130. Also,plate 7, the outer periphery ofconnection pipe 113, the inner periphery of ring-like seat 116, and the inner wall ofresonance chamber 128 make upspace 132, andresonance muffler 140 is formed byspace 132 andpassage 115. - And
cylinder head 123 is bolted tocylinder block 4 viaplate 7, and thereby,suction muffler 110 is press-fitted and secured onplate 7 bycylinder head 123 viaspring 142. - Also,
plane portion 1A of hermetic container 1 has a resonance frequency of about 2.5 kHz, and the resonance frequency ofopening 111 is set to about 1.6 kHz so that it does not coincide with the resonance frequency ofplane portion 1A. - On the other hand,
resonance muffler 140 is tuned to nearly same resonance frequency as for opening 111. - The operation of the compressor having the above configuration will be described in the following.
- When power is supplied to
electric motor unit 2, compressingunit 103 is driven andpiston 6 is reciprocally moved in the cylinder, then the refrigerant gas returned to hermetic container 1 from freezing cycle (not shown) is taken intosilencing space 112 from opening 111 ofsuction muffler 110, and it is taken intocylinder 5 fromconnection pipe 113 viasuction hole 8. And, the refrigerant gas compressed by the reciprocal motion ofpiston 6 is discharged fromdischarge hole 9 intodischarge chamber 124, and again delivered to the freezing cycle (not shown). - In this case, the refrigerant gas taken into
cylinder 5 viasuction hole 8 is intermittently inhaled aspiston 6 is reciprocally moved incylinder 5, and it is therefore accompanied by strong pressure pulsation. The pressure pulsation is greatly attenuated due to the effect of expansion muffler insilencing space 112 disposed insuction muffler 110 and the effect ofresonance muffler 140. - Also, the pressure pulsation remaining in
resonance muffler 140 is prevented from leaking into hermetic container 1 becauseresonance muffler 140 is isolated byseal portion 130 from the inside of hermetic container 1, thereby preventing the vibration from being propagated to the refrigerant gas in hermetic container 1. As a result, the effective function of the expansion muffler andresonance muffler 140 enables the reduction of noise. -
Seal portion 130 is formed byflange 118 andgroove 129 engaging each other, and since the total distance from the upper and lower surface offlange 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. - On the other hand, when engaging
suction muffler 110 withcylinder head 123, sinceflange 118 is generally U-shaped, R of the shoulder offlange 118 allows it to be easily fitted ingroove 129, assuring excellent workability. - Also, the refrigerant gas inhaled from
opening 111 contains mist-like oil (not shown), and the oil is separated from the refrigerant gas insilencing space 112. The separated oil stays at the bottom ofsuction muffler 110 and drips fromoil hole 119 ontoseal portion 130. Consequently, the oil gets into slight clearance created byseal portion 130, thereby sealing it to improve the sealing effect remarkably, and there is almost no leakage of pressure pulsation remaining inresonance muffler 140, and the effect of the expansion muffler and the effect ofresonance 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 thedischarge chamber 124 side is disposed along the inner wall, and therefore, the volume ofresonance chamber 128 can be maximized within a limited space without lessening the space volume ofdischarge chamber 124. As a result, the effect ofresonance muffler 140 can be enhanced, and greater silencing effect can be obtained. At the same time, ring-like seat 116 disposed along the inner wall ofresonance chamber 128 effectively regulates the rotational movement about the axis ofconnection pipe 113. In this way, whensuction muffler 110 is press-fitted and secured onplate 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 betweenplate 7 andsuction muffler 110. - In the preferred embodiment 1, since
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. - In addition,
plane portion 1A formed in hermetic container 1 is poor in rigidity, and as a result, if excited by the number of vibrations inherent to planeportion 1A, the portion will be liable to resonate, giving rise to the generation of great noise. However, in the preferred embodiment 1, as described above, the resonance frequency ofopening 111 that is liable to become the source of excitation is not coincident with the number of vibrations inherent to planeportion 1A, that is, they are independent of each other. Accordingly, the exciting force from opening 111 does not amplify the vibration ofplane portion 1A of hermetic container 1 that is most liable to resonate, and it is possible to suppress the generation of noise. - Because of the structure of
suction muffler 110, it internally has various space intervals, and therefore, the noise may be sometimes greatly amplified depending upon the wavelength of noise passing therethrough. In such a case, the amplified noise can be attenuated by making the noise at the frequency coincident with the resonance frequency ofresonance muffler 140, and such means is also very effective to realize the reduction of noise. - The effect in the present preferred embodiment can be similarly obtained with respect to refrigerant gas and oil being compatible with it which are used in a freezing or air conditioning apparatus such as a refrigerator and showcase.
- 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.
-
- 1
- Hermetic container
- 1A
- Plane portion
- 2
- Electric motor unit
- 5
- Cylinder
- 6
- Piston
- 7
- Plate
- 8
- Suction hole
- 101
- Oil
- 103
- Compressing unit
- 110
- Suction muffler
- 111
- Opening
- 113
- Connection pipe
- 118
- Flange
- 119
- Oil hole
- 123
- Cylinder head
- 124
- Discharge chamber
- 128
- Resonance chamber
- 129
- Groove
- 130
- Seal portion
Claims (9)
- A hermetic type compressor comprising:a hermetic container (1) which accommodates stored oil (101), an electric motor unit (2), and a compressing unit (103),wherein the compressing unit comprises:a cylinder (5) for storing a reciprocally moving piston (6), a plate (7) disposed at an end of the cylinder, a suction muffler (110) having a connection pipe (113) communicated to a suction hole (8) in the plate, and a cylinder head (123) disposed at the anti-cylinder side of the plate, andthe cylinder head (123) is formed with a discharge chamber (124) and a resonance chamber (128) which communicates with one open side of said connection pipe (113); characterized in that:a flange (118) is disposed at an outer periphery of the connection pipe (113);the cylinder head (123) is provided with a groove (129) at a position corresponding to the flange (118); andthe flange (118) is fitted in the groove (129), thereby forming a seal portion (130).
- The hermetic type compressor of claim 1, wherein the flange (118) has upper and lower surfaces and an outer periphery.
- The hermetic type compressor of any one of claims 1, 2, wherein the flange (118) is generally U-shaped.
- The hermetic type compressor of claim 1, wherein an oil hole (119) is disposed at the bottom of the suction muffler (110) that is above the seal portion (130).
- The hermetic type compressor of claim 4, wherein oil stored at the bottom of the suction muffler (110) drips from the oil hole (119) onto the seal portion (130).
- The hermetic type compressor of claim 1, wherein the resonance chamber (128) of the cylinder head has a nearly semi-circular shape arcuately extended to the discharge chamber side.
- The hermetic type compressor of any one of claims 1, 6, wherein the connection pipe (113) of the suction muffler is provided with a ring-like seat (116) formed so as to be disposed along an inner wall of the resonance chamber (128).
- The hermetic type compressor of any one of claims 1, 6, 7, wherein the suction muffler (110) is provided with an opening (111) formed in the hermetic container, and the resonance frequency of the opening (111) is nearly coincident with the resonance frequency of a resonance muffler (140) configured by the resonance chamber and the ring-like seat disposed along the inner wall of the resonance chamber.
- The hermetic type compressor of claim 8, wherein the resonance frequency of a plane portion (1A) formed in the hermetic container and the resonance frequency of the opening (111) of the suction muffler are independent of each other.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003088467 | 2003-03-27 | ||
JP2003088467A JP4492032B2 (en) | 2003-03-27 | 2003-03-27 | Hermetic compressor |
PCT/JP2004/001608 WO2004085849A1 (en) | 2003-03-27 | 2004-02-16 | Sealed type compressor |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1491767A1 EP1491767A1 (en) | 2004-12-29 |
EP1491767A4 EP1491767A4 (en) | 2006-01-18 |
EP1491767B1 true EP1491767B1 (en) | 2007-04-18 |
Family
ID=33095122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04711475A Expired - Lifetime EP1491767B1 (en) | 2003-03-27 | 2004-02-16 | Sealed type compressor |
Country Status (8)
Country | Link |
---|---|
US (1) | US20050207920A1 (en) |
EP (1) | EP1491767B1 (en) |
JP (1) | JP4492032B2 (en) |
CN (1) | CN100400869C (en) |
BR (1) | BRPI0403929A (en) |
DE (1) | DE602004005923T2 (en) |
MX (1) | MXPA04009433A (en) |
WO (1) | WO2004085849A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4682441B2 (en) * | 2001-05-07 | 2011-05-11 | パナソニック株式会社 | Hermetic electric compressor |
JP4734901B2 (en) * | 2004-11-22 | 2011-07-27 | パナソニック株式会社 | Compressor |
KR100831720B1 (en) * | 2004-12-06 | 2008-05-22 | 마쯔시다덴기산교 가부시키가이샤 | Hermetic Compressor |
JP4752255B2 (en) | 2004-12-06 | 2011-08-17 | パナソニック株式会社 | Hermetic compressor |
FR2895037A1 (en) * | 2005-12-20 | 2007-06-22 | Tecumseh Europ S A Sa | VALVE DEVICE FOR FLUID COMPRESSOR AND FLUID COMPRESSOR |
JP2007240948A (en) * | 2006-03-09 | 2007-09-20 | Mitsubishi Electric Corp | Noise reduction device and blower |
KR20080011231A (en) * | 2006-06-23 | 2008-01-31 | 마츠시타 덴끼 산교 가부시키가이샤 | Hermetic type compressor |
KR101386477B1 (en) * | 2008-01-10 | 2014-04-18 | 엘지전자 주식회사 | Noise reducing device for hermetic type compressor |
Family Cites Families (23)
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US4109751A (en) * | 1976-08-26 | 1978-08-29 | Deere & Company | Noise silencer |
DE3622996A1 (en) * | 1986-07-09 | 1988-02-18 | Danfoss As | SUCTION MUFFLER |
US4784581A (en) * | 1987-01-12 | 1988-11-15 | White Consolidated Industries, Inc. | Compressor head and suction muffler for hermetic compressor |
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 |
JPH03258980A (en) * | 1990-03-06 | 1991-11-19 | Matsushita Refrig Co Ltd | Sealed type electric compressor |
IT1274243B (en) * | 1993-11-12 | 1997-07-15 | Necchi Compressori | HERMETIC MOTOR-COMPRESSOR CONTAINER |
KR0143182B1 (en) * | 1994-04-29 | 1998-08-01 | 김광호 | Compressor |
KR0143142B1 (en) * | 1995-03-07 | 1998-08-01 | 김광호 | Cylinder apparatus for on reciprocating canpressor |
DE19522383C2 (en) * | 1995-06-23 | 1997-06-19 | Danfoss Compressors Gmbh | Suction silencer for a refrigerant compressor |
KR0156720B1 (en) * | 1995-07-27 | 1999-03-20 | 김광호 | Reciprocating compressor |
KR0175891B1 (en) * | 1995-07-29 | 1999-10-01 | 윤종용 | compressor |
KR100187223B1 (en) * | 1995-07-29 | 1999-05-01 | 김광호 | Muffler of a compressor |
KR0186169B1 (en) * | 1995-11-15 | 1999-05-01 | 구자홍 | Muffler locker of a hermetic compressor |
KR100194150B1 (en) * | 1995-12-05 | 1999-06-15 | 윤종용 | Hermetic reciprocating compressor |
JPH1047253A (en) * | 1996-07-31 | 1998-02-17 | Matsushita Refrig Co Ltd | Enclosed motor-driven compressor |
BR9604126A (en) * | 1996-08-21 | 1998-05-26 | Brasil Compressores Sa | Suction damper for hermetic compressor |
KR19980027501U (en) * | 1996-11-16 | 1998-08-05 | 박병재 | Fuel tank structure of car |
JP3516879B2 (en) * | 1999-03-25 | 2004-04-05 | 松下冷機株式会社 | Hermetic compressor |
DE19915918C2 (en) * | 1999-04-09 | 2001-05-31 | Danfoss Compressors Gmbh | Refrigerant compressor and method for its assembly |
DE19923734C2 (en) * | 1999-05-22 | 2001-03-29 | Danfoss Compressors Gmbh | Suction silencer for a hermetically sealed compressor |
JP3776025B2 (en) * | 2000-11-29 | 2006-05-17 | 松下冷機株式会社 | Hermetic compressor |
KR100402460B1 (en) * | 2000-12-06 | 2003-10-22 | 주식회사 엘지이아이 | Structure of head cover for hermetic compressor |
US6464480B2 (en) * | 2001-03-16 | 2002-10-15 | Scroll Technologies | Oil spout for scroll compressor |
-
2003
- 2003-03-27 JP JP2003088467A patent/JP4492032B2/en not_active Expired - Fee Related
-
2004
- 2004-02-16 BR BR0403929-7A patent/BRPI0403929A/en not_active IP Right Cessation
- 2004-02-16 EP EP04711475A patent/EP1491767B1/en not_active Expired - Lifetime
- 2004-02-16 US US10/509,748 patent/US20050207920A1/en not_active Abandoned
- 2004-02-16 WO PCT/JP2004/001608 patent/WO2004085849A1/en active IP Right Grant
- 2004-02-16 CN CNB200480000099XA patent/CN100400869C/en not_active Expired - Fee Related
- 2004-02-16 MX MXPA04009433A patent/MXPA04009433A/en unknown
- 2004-02-16 DE DE602004005923T patent/DE602004005923T2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1697931A (en) | 2005-11-16 |
BRPI0403929A (en) | 2005-01-04 |
CN100400869C (en) | 2008-07-09 |
JP2004293464A (en) | 2004-10-21 |
WO2004085849A1 (en) | 2004-10-07 |
EP1491767A4 (en) | 2006-01-18 |
DE602004005923T2 (en) | 2008-01-17 |
MXPA04009433A (en) | 2005-01-25 |
DE602004005923D1 (en) | 2007-05-31 |
JP4492032B2 (en) | 2010-06-30 |
EP1491767A1 (en) | 2004-12-29 |
US20050207920A1 (en) | 2005-09-22 |
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