EP1763634B1 - Hermetic compressor - Google Patents
Hermetic compressor Download PDFInfo
- Publication number
- EP1763634B1 EP1763634B1 EP06780901A EP06780901A EP1763634B1 EP 1763634 B1 EP1763634 B1 EP 1763634B1 EP 06780901 A EP06780901 A EP 06780901A EP 06780901 A EP06780901 A EP 06780901A EP 1763634 B1 EP1763634 B1 EP 1763634B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening end
- longitudinal direction
- space
- hermetic container
- hermetic
- 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.)
- Ceased
Links
- 230000003584 silencer Effects 0.000 claims abstract description 48
- 238000004891 communication Methods 0.000 claims abstract description 39
- 239000003507 refrigerant Substances 0.000 claims abstract description 39
- 230000006835 compression Effects 0.000 description 16
- 238000007906 compression Methods 0.000 description 16
- 230000010349 pulsation Effects 0.000 description 14
- 238000005057 refrigeration Methods 0.000 description 10
- 239000003595 mist Substances 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 4
- 230000001743 silencing effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920006038 crystalline resin Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
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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
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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
-
- 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
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
-
- 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
- F04B39/125—Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
- F05B2210/12—Kind or type gaseous, i.e. compressible
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
- F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/96—Preventing, counteracting or reducing vibration or noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/96—Preventing, counteracting or reducing vibration or noise
- F05B2260/962—Preventing, counteracting or reducing vibration or noise by means creating "anti-noise"
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
- Y10S417/902—Hermetically sealed motor pump unit
Definitions
- the present invention relates to a hermetic compressor of an inverter control type for use in refrigeration cycle apparatuses, such as an electric refrigerator.
- Fig. 5 is a cross sectional view of a conventional hermetic compressor 5001 disclosed in Japanese Patent Laid-Open Publication No. 2003-172265 .
- a hermetic container 1 accommodates therein an electric power element 5 and a compressor element 6.
- the electric power element 5 includes a rotor 4 and a stator 93 with windings 3A.
- the compressor element 6 is driven by the electric power element 5.
- the hermetic container 1 contains lubrication oil 8 at a bottom thereof.
- a crank shaft 10 includes a shaft portion 11 and an eccentric portion 12 having an axis deviated from that of the shaft portion 11.
- the rotor 4 is press-inserted into and tightened to the shaft portion 11.
- An oil pump 13 provided in the shaft portion 11 opens in the oil 8.
- a cylinder block 20 has a compression chamber 22 having a substantially cylindrical shape provided therein, and a shaft bearing 23 supporting the shaft portion 11. The cylinder block is located above the electric power element 5.
- a piston 30 is inserted into the compression chamber 22 to reciprocate in the chamber 22, and is joined with a coupler 31 to the eccentric portion 12.
- a valve plate 32 seals the compression chamber 22.
- a movable valve 33 made of strip spring is mounted on the valve plate 21.
- An intake opening 34 communicates with the compression chamber 22.
- the movable valve 33 and the intake opening 34 provide an intake valve 35.
- a head 36 provides a high-pressure chamber, and is fixed to a side of the valve plate 32 opposite to the compression chamber 22.
- An intake tube 39 is fixed to the hermetic container 1, and communicates with a low-pressure side of the refrigeration cycle to introduce refrigerant gas of R134a into the hermetic container 1.
- the hermetic container 1 is manufactured by press-forming a steel plate, and has a columnar resonant frequency of about 500Hz when the refrigerant gas of R134a is used.
- Fig. 6 is a front view of an intake muffler 40 of the hermetic compressor 5001.
- Fig. 7 is a cross sectional view of the intake muffler 40 at line 7-7 shown in Fig. 6 .
- the intake muffler 40 is made of resin material having a silencer space 41 provided therein.
- the silencer space 41 includes chambers 40A and 40B separating from each other to left and right, and a communication space 40C for communicating between the chambers 40A and 40B.
- a communication passage 42 communicates between the movable valve 33 and the silencer space 41.
- the communication passage 42 is bent by about 50 degrees and extends into the silencer space 41, and has an opening end 42A opening in the silencer space 41.
- Communication passage 43 communicates between the silencer space 41 and inside of the hermetic container 1.
- the communication passage 43 has an opening end 43A opening in the silencer space 41.
- the chamber 40A functions as a resonant muffler having a resonant frequency of about 500Hz.
- the rotor 4 of the electric power element 5 drives the crank shaft 10 to rotate the eccentric portion 12.
- the rotation of the eccentric portion 12 is transmitted via the coupler 31 to the piston 30 to have the piston 30 reciprocate in the compression chamber 22.
- This reciprocating movement causes the refrigerant gas to flow from a refrigeration system into the hermetic container 1, and introduces the gas through the intake tube 39 into the inside of the hermetic container 1.
- the introduced refrigerant gas reaches the chamber 40B through the communication passage 43.
- the refrigerant gas passes through the communication passage 42 and the intake opening 34, and flows into the compression chamber 22 while the movable valve 33 opens.
- the refrigerant gas is compressed in the compression chamber 22 and returned back to the refrigeration system.
- the movable valve 33 opens and closes when the refrigerant gas flows into the compression chamber 22. Upon opening and closing, the movable valve 33 may produce a pressure pulsation having various frequencies, and the pulsation is propagated in a direction reverse to the flowing direction of the refrigerant gas.
- a pressure pulsation out of the produced pulsation having a frequency of 500Hz of a resonant mode reaches the inside of the hermetic container 1, and increases a noise at 500Hz of the columnar resonant of the hermetic container 1.
- the chamber 40A provides the resonance muffler having the resonant frequency of 500Hz, thereby reducing the pressure pulsation at 500 Hz in the chamber 40A.
- the silencer space 41 of the intake muffler 40 necessarily provides a resonant muffler having a specific resonant frequency, hence preventing the intake muffler 40 from having a small size.
- the refrigerant gas Upon reaching the silencer space 41, the refrigerant gas has its speed become small, accordingly separating the oil from the refrigerant gas.
- the opening end 42A of the communication passage 42 faces the opening end 43A, and this arrangement causes most of the refrigerant gas reaching the silencer space 41 to be transferred into the communication passage 42.
- the refrigerant gas containing a lot of oil is introduced into the compression chamber 22.
- the intake mummer 40 may fail to reduce the noise caused by the pulsation, and may introduce the refrigerant gas containing a lot of oil into the compression chamber 22, thus having the performance of the compressor 5001 decline.
- Patent publications US 2005/129534 A1 (Lee Sung R) which representes the closest prior art
- EP 1 338 795 A (Matsushita Refrigeration Company)
- Patent abstracts of Japan vol. 2000, no. 08, 6 October 2000 JP 2000 130147 A (Matsushita Refrig Co LTD) each disclose an hermetic compressor of the type from which the present invention departs.
- the present invention provides a hermetic compressor as described in the appended independent and dependent claims.
- the hermetic compressor produces little noise and has a stable performance.
- Fig. 1 is a cross sectional view of a hermetic compressor 1001 according to an exemplary embodiment of the present invention.
- the hermetic compressor 1001 includes a compressor body 104 and a hermetic container 101 accommodating the compressor body 104 therein.
- the hermetic container 101 contains lubrication oil 102 at the bottom thereof.
- the compressor body 104 includes an electric power element 110 and a compressor element 120 driven by the electric power element 110.
- the hermetic container 101 is filled with hydrocarbon refrigerant, such as R600a, having a small global warming potential.
- a power source terminal 108 is mounted to the hermetic container 101 for connecting the electric power element 110 with a power source.
- the hermetic compressor 1001 has a height lower by about 20mm than that of the conventional hermetic compressor 5001 shown in Fig. 5 .
- the electric power element 110 includes a DC brushless motor of a projection-pole concentration winding type including a stator 112 and a rotor 114.
- the electric power element 110 is connected via the power source terminal 108 with a conductor line to an inverter drive circuit.
- the stator 112 includes a stator core having magnetic pole teeth and windings wound around the magnetic pole teeth.
- the stator core is made of electromagnetic steel material having a small iron loss.
- the windings are wound directly on insulator coatings covering entirely the magnetic pole teeth of the stator core.
- the rotor 114 includes a rotor core and a permanent magnet provided in the rotor core, and is fixed to a main shaft 122 of a crank shaft 121.
- the electric power element 110 is driven at plural frequencies ranging from 18 r/s to 81 r/s by the inverter drive circuit.
- the compressor element 120 will be explained in detail.
- the compressor element 120 is located above the electric power element 110.
- the compressor element 120 includes a cylinder 130, a piston 128, the crank shaft 121, and an intake muffler 140.
- the crank shaft 121 includes the main shaft 122 and an eccentric shaft 124. A lower end 122A of the main shaft 122 is immersed in the oil 102.
- the crank shaft 121 has a lubrication mechanism 125 extending from the lower end 122A of the main shaft 122 to an upper end 124A of the eccentric shaft 124.
- a block 126 includes the cylinder 130 and a bearing portion 127 supporting the main shaft 122 during rotation.
- the piston 128 is accommodated in the cylinder 130 to reciprocate in the cylinder.
- the piston 128 provides a compression chamber 134 together with a valve plate mounted at one end of the cylinder 130, and compresses the refrigerant in the cylinder 130.
- the piston 128 is coupled to the eccentric shaft 124 with a coupler 136.
- the intake muffler 140 is made of synthetic resin material, such as poly-butylene terephthalate or crystalline resin, containing fiber glass, and securely sandwiched between the valve plate 132 and a cylinder head 138.
- Fig. 2 is a cross sectional view of the intake muffler 140 of the hermetic compressor 1001.
- Fig. 3 is a cross sectional view of the intake muffler 140 at line 3-3 shown in Fig. 2 .
- the intake muffler 140 has a silencer space 142 provided therein, and includes a communication tube 150 and a tail tube 152.
- the communication tube 150 has an opening end 154 opening in the silencer space 142 and an opening end 156 communicating with the compression chamber 134 in the cylinder 130.
- the tail tube 152 has an opening end 158 opening in the silencer space 142 and an opening end 160 communicating with an inner space 141 in the hermetic container 101.
- the opening end 154 of the communication tube 150 and the opening end 158 of the tail tube 152 are distanced in a predetermined direction 1142 out of a longitudinal direction 1140 of the silencer space 142 from a center 1141 of the silencer space 142 along the longitudinal direction 1140.
- the opening end 154 and the opening end 158 are arranged close to each other.
- a distance L3 between the opening end 154 of the communication tube 150 and the opening end 158 of the tail tube 152 along the longitudinal direction 1140 is shorter than at least one of a distance L2 between the opening end 154 of the communication tube 150 and the center 1141 of the silencer space 142 along the longitudinal direction 1140 and a distance L1 between the opening end 158 of the tail tube 152 and the center 1141 along the longitudinal direction 1140.
- the communication tube 150 and the tail tube 152 extend along the longitudinal direction 1140 and passes through a plane 1145 which is perpendicular to the longitudinal direction 1140 and which includes the center 1141 of the silencer space 142 along the longitudinal direction 1140.
- the opening end 154 of the communication tube 150 has an extending length larger than that of the opening end 158 of the tail tube 152 in the silencer space 142. In other words, the distance L2 is longer than the distance L1.
- the opening end 154 of the communication tube 150 is located above the opening end 158 of the tail tube 152.
- a portion 212A of a wall 212 of the intake muffler 140 which defines the silencer space 142 provides the tail tube 152.
- the portion 212A, a portion of the tail tube 152, of the wall 212 of the intake muffler 140 is connected with an extension 214.
- the extension 214 inclines in a direction 1143 having the silencer space 142 flare.
- the inverter drive circuit energizes the electric power element 110
- the stator 112 generates a magnetic field to rotate the rotor 114, accordingly rotating the crank shaft 121.
- the eccentric shaft 124 rotates eccentrically. This eccentric rotation is concerted into a reciprocating movement via the coupler 136.
- the reciprocating movement of the piston 128 introduces the refrigerant gas in the hermetic container 101 into the compression chamber 134 to have the gas compressed. (a compressing process).
- the refrigerant gas in the hermetic container 101 is intermittently introduced into the compression chamber 134 via the intake muffler 140.
- the refrigerant gas is compressed, and is then sent via an exhaust tube to the refrigeration cycle outside the hermetic container 101.
- the intake muffler 140 reduces a pulsation noise produced by the intermittent introduction of the refrigerant gas.
- the intake muffler 140 is made of polybutylene terephthalate which has a heat propagation much smaller than that of metals, and reduces a temperature rise of the refrigerant gas having a low temperature returning from the refrigeration cycle, hence preventing a cooling performance of the refrigeration cycle from decline.
- FIG. 4 shows an acoustic profile of the silencer space 142 in the intake muffler 140.
- the horizontal axis represents a frequency
- the vertical axis represents an acoustic pressure level released from an opening end 160 of the tail tube 152 of the intake muffler 140. The smaller the acoustic pressure level is, the grater the silencing effect is.
- Fig. 4 illustrates an acoustic profile 170 of the intake muffler 140 according to the embodiment as well as an acoustic profile 173 of an intake muffler of a comparative example.
- the opening end 158 of the tail tube 152 is located at the center 1141 along the longitudinal direction 1140 of the silencer space 142.
- a main component of the pulsation noise produced in the hermetic container 101 is a resonant sound in the inner space 141 of the hermetic container 101.
- an anti-resonant frequency 171 of in the acoustic profile 170 is equal to the resonant frequency 162 in the inner space 141.
- the anti-resonant frequency 171 shifts towards higher frequencies, similarly to an anti-resonant frequency 174.
- An amount of the reduced noise declines as the anti-resonant frequency 171 approaches the resonant frequency 172, similarly to an amount of reduced noise at the anti-resonant frequency 174.
- the opening end 158 of the tail tube 152 is preferably located farther from the center 1141 and closer to the opening end 154 of the communication tube 150, thereby increasing the amount of reduced noise at the anti-resonant frequency 171.
- a specific frequency of an outstanding pulsation noise produced in the hermetic compressor 1001 is identical to the anti-resonant frequency 171, thereby reducing the pulsation noise around the frequency.
- Peaks P1 and P2 of the acoustic profile 170 at the resonant frequency 172 are larger than peaks P3 and P4 of the acoustic profile 173 at the resonant frequency 175 of the intake muffler of the comparative example.
- the resonant frequency 162 departs from the specific frequency of the outstanding pulsation noise, the pulsation noise is not amplified in the intake muffler 140, and is not released as a large noise from the hermetic compressor 1001.
- the silencer space 142 has a small volume due to the reducing of the size of hermetic compressor 1001 and resulting in reducing a silencing effect of the intake muffler 140, the muffler 140 has a large silencing effect at the specific frequency.
- the specific frequency of the pulsation noise is determined to the resonant frequency 162 of the inner space 141 of the hermetic container 101, thereby reducing the pulsation noise from the hermetic compressor 1001.
- the oil 102 stored at the bottom of the hermetic container 101 according to the compressing process is pumped up and supplied from the lower end 122A of the main shaft 122 to the upper end 124A of the eccentric shaft 124 by the lubrication mechanism 125 of the crank shaft 121.
- the oil is then sprayed and splashed to moving components of the hermetic container 101. While a portion of the oil becomes oil mist mixed with the refrigerant gas, most of the oil drops down and is stored at the bottom of the hermetic container 101.
- the refrigerant gas 200 having the portion of the oil mixed therewith is introduced from the inner space 141 through the tail tube 152 to the silencer space 142, and then, is sucked into the opening end 154 of the communication tube 150.
- the opening end 154 of the communication tube 150 and the opening end 158 of the tail tube 152 face in the same direction 1142. Most of the refrigerant gas 200 discharged from the opening end 158 of the tail tube 152 is sucked into the silencer space 142 while contacting an outer wall 154A of the opening end 154 of the communication tube 150.
- the oil mist mixed in the refrigerant gas 200 is attached to the outer wall 154A of the opening end 154 of the communication tube 150, thereby being allowing oil 102 to be separated from the refrigerant gas 200.
- the separated oil 102 drops down to the bottom of the silencer space 142 in the intake muffler 140. Then, the oil 102 passes through an oil outlet 178, and drained out to the inner space 141 of the hermetic container 101, then stored at the bottom of the hermetic container 101. Accordingly, the refrigerant gas containing a small amount of the oil mist is introduced into the cylinder 130, hence ensuring a stable performance of the hermetic compressor 1001.
- the opening end 154 of the communication tube 150 extends longer than the opening end 158 of the tail tube 152. In other words, the opening end 154 of the communication tube 150 extends further than the opening end 158 of the tail tube 152 in the silencer space 142. That is, the distance L2 is longer than the distance L1.
- This arrangement increases the area of the outer wall 154A of the opening end 154 which the oil mist contacts, accordingly separating a large amount of the oil from the refrigerant gas 200 and providing the hermetic compressor 1001 with a high efficiency and a stable performance.
- the opening end 154 of the communication tube 150 is located above the opening end 158 of the tail tube 152. This arrangement allows the outer wall 154A of the opening end 154 of the communication tube 150 to face towards a downward direction 1144.
- the oil 102 separated from the refrigerant gas and attached to the outer wall 154A of the communication tube 150 drops down to the bottom of the silencer space 142 of the hermetic container 101.
- the separated oil 102 is prevented from being sucked into the opening end 154 of the communication tube 150, accordingly allowing the refrigerant gas containing a small amount of oil mist to be introduced into the cylinder 130. Accordingly, the hermetic compressor 1001 has a high efficiency and a stable performance.
- the portion 212A of the wall 212 providing the tail tube 152 is also a portion of the wall 212 which defines the silencer space 142
- the extension 214 of the wall 212 inclines in the direction 1143 to allow the silencer space 142 to flare.
- This structure allows the refrigerant gas 200 containing the oil mist to flow directly on and along the portion 212A of the wall 212, accordingly separating the oil 102 from the refrigerant gas 200 and causing the oil 102 to attached to the wall 212.
- the refrigerant gas 200 flowing from the opening end 158 of the tail tube 152 and enters into the silencer space 142.
- the oil 102 attached to the wall 212 is then carried on extension 215 away from the refrigerant gas 200, and then drops down from extension 215 to the bottom of the silencer space 142. Accordingly, the refrigerant gas 200 taken into the opening end 154 of the communication tube 150 has a large purity containing a small amount of the oil, hence providing the hermetic compressor 1001 with a high efficiency and a stable performance.
- the electric power element 110 of this embodiment includes the DC brushless motor having the windings concentrate-wound around the projection poles.
- the electric power element 110 may include an induction motor of a distributed winding type accompanied with the intake muffler 140 reducing the noise released from the compressor, hence providing the hermetic compressor with a stable performance and a small size.
- the electric power element 110 employing a motor including rare earth magnets having large magnetic strength, can reduce the height, thus providing a hermetic compressor having the small height and producing a small noise.
- the hermetic compressor 1001 of this embodiment can be driven operate throughout a wide range of revolutions by the inverter drive circuit.
- the splashed status of the oil 102 depends largely on the revolution.
- the high revolution operation of the hermetic compressor 1001 of this embodiment causes the refrigerant gas to flow directly on and along the wall 212 of the tail tube 152, accordingly separating the refrigerant gas from the oiL
- the hermetic compressor 1001 prevents the oil 102 from entering into the compression chamber 134 throughout a wide range of revolutions, hence ensuring a high efficiency and a stable performance.
- the hermetic compressor 1001 allows the acoustic characteristics of the intake muffler 140 to be optimized, and separates the refrigerant gas reliably from the oil 102, hence having a stable performance and producing little noise.
- a hermetic compressor according to the present invention produces little noise and has a stable performance, hence being useful not only for electric refrigerators but also for refrigerating apparatus, such as air conditioners and automatic vending machines.
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Abstract
Description
- The present invention relates to a hermetic compressor of an inverter control type for use in refrigeration cycle apparatuses, such as an electric refrigerator.
- Influences to global environment have been demanded to decrease, and accordingly, refrigeration cycle apparatuses, such as a refrigerator, are requested to generate less noise and to have high operational efficiency.
-
Fig. 5 is a cross sectional view of a conventionalhermetic compressor 5001 disclosed in Japanese Patent Laid-Open Publication No.2003-172265 hermetic container 1 accommodates therein an electric power element 5 and a compressor element 6. The electric power element 5 includes a rotor 4 and astator 93 withwindings 3A. The compressor element 6 is driven by the electric power element 5. Thehermetic container 1 containslubrication oil 8 at a bottom thereof. - A
crank shaft 10 includes ashaft portion 11 and aneccentric portion 12 having an axis deviated from that of theshaft portion 11. The rotor 4 is press-inserted into and tightened to theshaft portion 11. Anoil pump 13 provided in theshaft portion 11 opens in theoil 8. Acylinder block 20 has acompression chamber 22 having a substantially cylindrical shape provided therein, and a shaft bearing 23 supporting theshaft portion 11. The cylinder block is located above the electric power element 5. - A
piston 30 is inserted into thecompression chamber 22 to reciprocate in thechamber 22, and is joined with acoupler 31 to theeccentric portion 12. Avalve plate 32 seals thecompression chamber 22. Amovable valve 33 made of strip spring is mounted on the valve plate 21. An intake opening 34 communicates with thecompression chamber 22. Themovable valve 33 and theintake opening 34 provide anintake valve 35. Ahead 36 provides a high-pressure chamber, and is fixed to a side of thevalve plate 32 opposite to thecompression chamber 22. Anintake tube 39 is fixed to thehermetic container 1, and communicates with a low-pressure side of the refrigeration cycle to introduce refrigerant gas of R134a into thehermetic container 1. - The
hermetic container 1 is manufactured by press-forming a steel plate, and has a columnar resonant frequency of about 500Hz when the refrigerant gas of R134a is used. -
Fig. 6 is a front view of anintake muffler 40 of thehermetic compressor 5001.Fig. 7 is a cross sectional view of theintake muffler 40 at line 7-7 shown inFig. 6 . Theintake muffler 40 is made of resin material having asilencer space 41 provided therein. Thesilencer space 41 includeschambers communication space 40C for communicating between thechambers communication passage 42 communicates between themovable valve 33 and thesilencer space 41. Thecommunication passage 42 is bent by about 50 degrees and extends into thesilencer space 41, and has anopening end 42A opening in thesilencer space 41.Communication passage 43 communicates between thesilencer space 41 and inside of thehermetic container 1. Thecommunication passage 43 has anopening end 43A opening in thesilencer space 41. Thechamber 40A functions as a resonant muffler having a resonant frequency of about 500Hz. - An operation of the
hermetic compressor 5001 will be explained below. The rotor 4 of the electric power element 5 drives thecrank shaft 10 to rotate theeccentric portion 12. The rotation of theeccentric portion 12 is transmitted via thecoupler 31 to thepiston 30 to have thepiston 30 reciprocate in thecompression chamber 22. This reciprocating movement causes the refrigerant gas to flow from a refrigeration system into thehermetic container 1, and introduces the gas through theintake tube 39 into the inside of thehermetic container 1. The introduced refrigerant gas reaches thechamber 40B through thecommunication passage 43. Then the refrigerant gas passes through thecommunication passage 42 and the intake opening 34, and flows into thecompression chamber 22 while themovable valve 33 opens. The refrigerant gas is compressed in thecompression chamber 22 and returned back to the refrigeration system. - The
movable valve 33 opens and closes when the refrigerant gas flows into thecompression chamber 22. Upon opening and closing, themovable valve 33 may produce a pressure pulsation having various frequencies, and the pulsation is propagated in a direction reverse to the flowing direction of the refrigerant gas. A pressure pulsation out of the produced pulsation having a frequency of 500Hz of a resonant mode reaches the inside of thehermetic container 1, and increases a noise at 500Hz of the columnar resonant of thehermetic container 1. However, thechamber 40A provides the resonance muffler having the resonant frequency of 500Hz, thereby reducing the pressure pulsation at 500 Hz in thechamber 40A. - In the
conventional compressor 5001, thesilencer space 41 of theintake muffler 40 necessarily provides a resonant muffler having a specific resonant frequency, hence preventing theintake muffler 40 from having a small size. - Upon reaching the
silencer space 41, the refrigerant gas has its speed become small, accordingly separating the oil from the refrigerant gas. Theopening end 42A of thecommunication passage 42 faces theopening end 43A, and this arrangement causes most of the refrigerant gas reaching thesilencer space 41 to be transferred into thecommunication passage 42. Thus, the refrigerant gas containing a lot of oil is introduced into thecompression chamber 22. - As explained above, the
intake mummer 40 may fail to reduce the noise caused by the pulsation, and may introduce the refrigerant gas containing a lot of oil into thecompression chamber 22, thus having the performance of thecompressor 5001 decline. - Patent publications
US 2005/129534 A1 (Lee Sung R) which representes the closest prior art,EP 1 338 795 AJP 2000 130147 A - The present invention provides a hermetic compressor as described in the appended independent and dependent claims.
- The hermetic compressor produces little noise and has a stable performance.
-
-
Fig. 1 is a cross sectional view of a hermetic compressor according to an exemplary embodiment of the present invention. -
Fig. 2 is a cross sectional view of an intake muffler of the hermetic compressor according to the embodiment. -
Fig. 3 is a cross sectional view of the intake muffler at line 3-3 shown inFig. 2 . -
Fig. 4 shows an acoustic profile of the intake muffler according to the embodiment. -
Fig. 5 is a cross sectional view of a conventional hermetic compressor. -
Fig. 6 is a front view of an intake muffler of the conventional hermetic compressor. -
Fig. 7 is a cross sectional view of the intake muffler at line 7-7 shown inFig. 6 . -
Fig. 1 is a cross sectional view of ahermetic compressor 1001 according to an exemplary embodiment of the present invention. Thehermetic compressor 1001 includes acompressor body 104 and ahermetic container 101 accommodating thecompressor body 104 therein. Thehermetic container 101 containslubrication oil 102 at the bottom thereof. Thecompressor body 104 includes anelectric power element 110 and acompressor element 120 driven by theelectric power element 110. Thehermetic container 101 is filled with hydrocarbon refrigerant, such as R600a, having a small global warming potential. Apower source terminal 108 is mounted to thehermetic container 101 for connecting theelectric power element 110 with a power source. Thehermetic compressor 1001 has a height lower by about 20mm than that of the conventionalhermetic compressor 5001 shown inFig. 5 . - The
electric power element 110 will be explained in detail. Theelectric power element 110 includes a DC brushless motor of a projection-pole concentration winding type including astator 112 and arotor 114. Theelectric power element 110 is connected via thepower source terminal 108 with a conductor line to an inverter drive circuit. - The
stator 112 includes a stator core having magnetic pole teeth and windings wound around the magnetic pole teeth. The stator core is made of electromagnetic steel material having a small iron loss. The windings are wound directly on insulator coatings covering entirely the magnetic pole teeth of the stator core. Therotor 114 includes a rotor core and a permanent magnet provided in the rotor core, and is fixed to amain shaft 122 of acrank shaft 121. Theelectric power element 110 is driven at plural frequencies ranging from 18 r/s to 81 r/s by the inverter drive circuit. - The
compressor element 120 will be explained in detail. Thecompressor element 120 is located above theelectric power element 110. Thecompressor element 120 includes acylinder 130, apiston 128, thecrank shaft 121, and anintake muffler 140. - The
crank shaft 121 includes themain shaft 122 and aneccentric shaft 124. Alower end 122A of themain shaft 122 is immersed in theoil 102. Thecrank shaft 121 has alubrication mechanism 125 extending from thelower end 122A of themain shaft 122 to anupper end 124A of theeccentric shaft 124. Ablock 126 includes thecylinder 130 and a bearingportion 127 supporting themain shaft 122 during rotation. - The
piston 128 is accommodated in thecylinder 130 to reciprocate in the cylinder. Thepiston 128 provides acompression chamber 134 together with a valve plate mounted at one end of thecylinder 130, and compresses the refrigerant in thecylinder 130. Thepiston 128 is coupled to theeccentric shaft 124 with acoupler 136. - The
intake muffler 140 is made of synthetic resin material, such as poly-butylene terephthalate or crystalline resin, containing fiber glass, and securely sandwiched between thevalve plate 132 and acylinder head 138. -
Fig. 2 is a cross sectional view of theintake muffler 140 of thehermetic compressor 1001.Fig. 3 is a cross sectional view of theintake muffler 140 at line 3-3 shown inFig. 2 . Theintake muffler 140 has asilencer space 142 provided therein, and includes acommunication tube 150 and atail tube 152. Thecommunication tube 150 has anopening end 154 opening in thesilencer space 142 and anopening end 156 communicating with thecompression chamber 134 in thecylinder 130. Thetail tube 152 has anopening end 158 opening in thesilencer space 142 and anopening end 160 communicating with aninner space 141 in thehermetic container 101. - The opening
end 154 of thecommunication tube 150 and the openingend 158 of thetail tube 152 are distanced in apredetermined direction 1142 out of alongitudinal direction 1140 of thesilencer space 142 from acenter 1141 of thesilencer space 142 along thelongitudinal direction 1140. The openingend 154 and the openingend 158 are arranged close to each other. More particularly, a distance L3 between the openingend 154 of thecommunication tube 150 and the openingend 158 of thetail tube 152 along thelongitudinal direction 1140 is shorter than at least one of a distance L2 between the openingend 154 of thecommunication tube 150 and thecenter 1141 of thesilencer space 142 along thelongitudinal direction 1140 and a distance L1 between the openingend 158 of thetail tube 152 and thecenter 1141 along thelongitudinal direction 1140. Thecommunication tube 150 and thetail tube 152 extend along thelongitudinal direction 1140 and passes through aplane 1145 which is perpendicular to thelongitudinal direction 1140 and which includes thecenter 1141 of thesilencer space 142 along thelongitudinal direction 1140. - The opening
end 154 of thecommunication tube 150 has an extending length larger than that of the openingend 158 of thetail tube 152 in thesilencer space 142. In other words, the distance L2 is longer than the distance L1. The openingend 154 of thecommunication tube 150 is located above the openingend 158 of thetail tube 152. - A
portion 212A of awall 212 of theintake muffler 140 which defines thesilencer space 142 provides thetail tube 152. Theportion 212A, a portion of thetail tube 152, of thewall 212 of theintake muffler 140 is connected with anextension 214. Theextension 214 inclines in adirection 1143 having thesilencer space 142 flare. - An operation of the
hermetic compressor 1001 will be explained below. When the inverter drive circuit energizes theelectric power element 110, thestator 112 generates a magnetic field to rotate therotor 114, accordingly rotating thecrank shaft 121. As themain shaft 122 of thecrank shaft 121 rotates, theeccentric shaft 124 rotates eccentrically. This eccentric rotation is concerted into a reciprocating movement via thecoupler 136. This causes thepiston 128 to reciprocate in thecylinder 130. The reciprocating movement of thepiston 128 introduces the refrigerant gas in thehermetic container 101 into thecompression chamber 134 to have the gas compressed. (a compressing process). - Due to the compressing of the refrigeration gas, the refrigerant gas in the
hermetic container 101 is intermittently introduced into thecompression chamber 134 via theintake muffler 140. The refrigerant gas is compressed, and is then sent via an exhaust tube to the refrigeration cycle outside thehermetic container 101. Theintake muffler 140 reduces a pulsation noise produced by the intermittent introduction of the refrigerant gas. Theintake muffler 140 is made of polybutylene terephthalate which has a heat propagation much smaller than that of metals, and reduces a temperature rise of the refrigerant gas having a low temperature returning from the refrigeration cycle, hence preventing a cooling performance of the refrigeration cycle from decline. - A silencing effect of the
intake muffler 140 will be explained in detail.Fig. 4 shows an acoustic profile of thesilencer space 142 in theintake muffler 140. InFig. 4 , the horizontal axis represents a frequency, and the vertical axis represents an acoustic pressure level released from an openingend 160 of thetail tube 152 of theintake muffler 140. The smaller the acoustic pressure level is, the grater the silencing effect is.Fig. 4 illustrates anacoustic profile 170 of theintake muffler 140 according to the embodiment as well as anacoustic profile 173 of an intake muffler of a comparative example. In the intake muffler of the comparative example, the openingend 158 of thetail tube 152 is located at thecenter 1141 along thelongitudinal direction 1140 of thesilencer space 142. - A main component of the pulsation noise produced in the
hermetic container 101 is a resonant sound in theinner space 141 of thehermetic container 101. In theintake muffler 140 according to this embodiment, ananti-resonant frequency 171 of in theacoustic profile 170 is equal to theresonant frequency 162 in theinner space 141. - If the opening
end 158 of thetail tube 152 is located farther from the openingend 154 of thecommunication tube 150 and is located closer to thecenter 1141 of thesilencer space 142, theanti-resonant frequency 171 shifts towards higher frequencies, similarly to ananti-resonant frequency 174. An amount of the reduced noise declines as theanti-resonant frequency 171 approaches theresonant frequency 172, similarly to an amount of reduced noise at theanti-resonant frequency 174. - Thus, the opening
end 158 of thetail tube 152 is preferably located farther from thecenter 1141 and closer to the openingend 154 of thecommunication tube 150, thereby increasing the amount of reduced noise at theanti-resonant frequency 171. A specific frequency of an outstanding pulsation noise produced in thehermetic compressor 1001 is identical to theanti-resonant frequency 171, thereby reducing the pulsation noise around the frequency. - Peaks P1 and P2 of the
acoustic profile 170 at theresonant frequency 172 are larger than peaks P3 and P4 of theacoustic profile 173 at theresonant frequency 175 of the intake muffler of the comparative example. Theresonant frequency 162 departs from the specific frequency of the outstanding pulsation noise, the pulsation noise is not amplified in theintake muffler 140, and is not released as a large noise from thehermetic compressor 1001. - Even if the
silencer space 142 has a small volume due to the reducing of the size ofhermetic compressor 1001 and resulting in reducing a silencing effect of theintake muffler 140, themuffler 140 has a large silencing effect at the specific frequency. - The specific frequency of the pulsation noise is determined to the
resonant frequency 162 of theinner space 141 of thehermetic container 101, thereby reducing the pulsation noise from thehermetic compressor 1001. - The
oil 102 stored at the bottom of thehermetic container 101 according to the compressing process is pumped up and supplied from thelower end 122A of themain shaft 122 to theupper end 124A of theeccentric shaft 124 by thelubrication mechanism 125 of thecrank shaft 121. The oil is then sprayed and splashed to moving components of thehermetic container 101. While a portion of the oil becomes oil mist mixed with the refrigerant gas, most of the oil drops down and is stored at the bottom of thehermetic container 101. - The
refrigerant gas 200 having the portion of the oil mixed therewith is introduced from theinner space 141 through thetail tube 152 to thesilencer space 142, and then, is sucked into the openingend 154 of thecommunication tube 150. The openingend 154 of thecommunication tube 150 and the openingend 158 of thetail tube 152 face in thesame direction 1142. Most of therefrigerant gas 200 discharged from the openingend 158 of thetail tube 152 is sucked into thesilencer space 142 while contacting anouter wall 154A of the openingend 154 of thecommunication tube 150. - The oil mist mixed in the
refrigerant gas 200 is attached to theouter wall 154A of the openingend 154 of thecommunication tube 150, thereby being allowingoil 102 to be separated from therefrigerant gas 200. The separatedoil 102 drops down to the bottom of thesilencer space 142 in theintake muffler 140. Then, theoil 102 passes through anoil outlet 178, and drained out to theinner space 141 of thehermetic container 101, then stored at the bottom of thehermetic container 101. Accordingly, the refrigerant gas containing a small amount of the oil mist is introduced into thecylinder 130, hence ensuring a stable performance of thehermetic compressor 1001. - The opening
end 154 of thecommunication tube 150 extends longer than the openingend 158 of thetail tube 152. In other words, the openingend 154 of thecommunication tube 150 extends further than the openingend 158 of thetail tube 152 in thesilencer space 142. That is, the distance L2 is longer than the distance L1. This arrangement increases the area of theouter wall 154A of the openingend 154 which the oil mist contacts, accordingly separating a large amount of the oil from therefrigerant gas 200 and providing thehermetic compressor 1001 with a high efficiency and a stable performance. - The opening
end 154 of thecommunication tube 150 is located above the openingend 158 of thetail tube 152. This arrangement allows theouter wall 154A of the openingend 154 of thecommunication tube 150 to face towards adownward direction 1144. Theoil 102 separated from the refrigerant gas and attached to theouter wall 154A of thecommunication tube 150 drops down to the bottom of thesilencer space 142 of thehermetic container 101. The separatedoil 102 is prevented from being sucked into the openingend 154 of thecommunication tube 150, accordingly allowing the refrigerant gas containing a small amount of oil mist to be introduced into thecylinder 130. Accordingly, thehermetic compressor 1001 has a high efficiency and a stable performance. - While the
portion 212A of thewall 212 providing thetail tube 152 is also a portion of thewall 212 which defines thesilencer space 142, theextension 214 of thewall 212 inclines in thedirection 1143 to allow thesilencer space 142 to flare. This structure allows therefrigerant gas 200 containing the oil mist to flow directly on and along theportion 212A of thewall 212, accordingly separating theoil 102 from therefrigerant gas 200 and causing theoil 102 to attached to thewall 212. Therefrigerant gas 200 flowing from the openingend 158 of thetail tube 152 and enters into thesilencer space 142. - The
oil 102 attached to thewall 212 is then carried on extension 215 away from therefrigerant gas 200, and then drops down from extension 215 to the bottom of thesilencer space 142. Accordingly, therefrigerant gas 200 taken into the openingend 154 of thecommunication tube 150 has a large purity containing a small amount of the oil, hence providing thehermetic compressor 1001 with a high efficiency and a stable performance. - The
electric power element 110 of this embodiment includes the DC brushless motor having the windings concentrate-wound around the projection poles. Theelectric power element 110 may include an induction motor of a distributed winding type accompanied with theintake muffler 140 reducing the noise released from the compressor, hence providing the hermetic compressor with a stable performance and a small size. - The
electric power element 110, employing a motor including rare earth magnets having large magnetic strength, can reduce the height, thus providing a hermetic compressor having the small height and producing a small noise. - The
hermetic compressor 1001 of this embodiment can be driven operate throughout a wide range of revolutions by the inverter drive circuit. The splashed status of theoil 102 depends largely on the revolution. When thecompressor 1001 is driven at high revolutions, a large amount of theoil 102 is splashed and carried easily into theintake muffler 140. The high revolution operation of thehermetic compressor 1001 of this embodiment causes the refrigerant gas to flow directly on and along thewall 212 of thetail tube 152, accordingly separating the refrigerant gas from the oiL Thehermetic compressor 1001 prevents theoil 102 from entering into thecompression chamber 134 throughout a wide range of revolutions, hence ensuring a high efficiency and a stable performance. - As set forth above, the
hermetic compressor 1001 according to the embodiment allows the acoustic characteristics of theintake muffler 140 to be optimized, and separates the refrigerant gas reliably from theoil 102, hence having a stable performance and producing little noise. - It would be understood that the present invention is not limited to the foregoing embodiment.
- A hermetic compressor according to the present invention produces little noise and has a stable performance, hence being useful not only for electric refrigerators but also for refrigerating apparatus, such as air conditioners and automatic vending machines.
-
- 101
- Hermetic Container
- 101A
- Inner Space
- 130
- Cylinder
- 140
- Intake Muffler
- 142
- Silencer Space
- 150
- Communication Tube
- 152
- Tail Tube
- 154
- Opening End of
Communication Tube 150 - 158
- Opening End of
Tail Tube 152 - 1001
- Hermetic Compressor
- 1140
- Longitudinal Direction of
Silencer Space 142
Claims (4)
- A hermetic compressor comprising:a hermetic container (101) having an inner space (141) therein;a cylinder (130) accommodated in the hermetic container and arranged to compress refrigerant (200) therein;an intake muffler (140) accommodated in the hermetic container, the intake muffler having a silencer space (142) therein, the silencer space having a longitudinal direction (1140);a communication tube (150) having a first opening end (154) opening in the silencer space, the communication tube communicating with the cylinder; anda tail tube (152) having a second opening end (158) opening in the silencer space, the tail tube communicating with the inner space of the hermetic container, whereinthe first opening end and the second opening end are located in a predetermined direction (1142) from a center (1141) of the silencer space along the longitudinal direction of the silencer space,the communication tube and the tail tube extend in the longitudinal direction, anda distance (L3) between the first opening end and the second opening end along the longitudinal direction is shorter than at least one of a distance (L2) between the first opening end and the center along the longitudinal direction and a distance (L1) between the second opening end and the center along the longitudinal direction characterized in thatthe distance between the first opening end and the center along the longitudinal direction direction is longer than the distance between the second opening end and the center along the longitudinal direction,the communication tube is located above the tail tube, andan outer wall (154A) of the communication tube at the first opening end faces towards a downward direction (1144).
- The hermetic compressor according to claim 1, wherein an anti-resonant frequency in the silencer space of the intake muffler is identical to a resonant frequency in the inner space of the hermetic container.
- The hermetic compressor according to claim 1, wherein
the intake muffler includes a wall (212) defining the silencer space, and the
wall includes
a portion providing the tail tube, and
an extension (214) extending in a direction (1143) allowing the silencer space to flare. - The hermetic compressor according to claim 1, wherein oil (102) is spattered in the inner space of the hermetic container.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005197179A JP4735084B2 (en) | 2005-07-06 | 2005-07-06 | Hermetic compressor |
PCT/JP2006/313626 WO2007004725A1 (en) | 2005-07-06 | 2006-07-03 | Hermetic compressor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1763634A1 EP1763634A1 (en) | 2007-03-21 |
EP1763634B1 true EP1763634B1 (en) | 2011-04-06 |
Family
ID=36950129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06780901A Ceased EP1763634B1 (en) | 2005-07-06 | 2006-07-03 | Hermetic compressor |
Country Status (7)
Country | Link |
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US (1) | US20090004031A1 (en) |
EP (1) | EP1763634B1 (en) |
JP (1) | JP4735084B2 (en) |
KR (1) | KR100822577B1 (en) |
CN (1) | CN1892024B (en) |
DE (1) | DE602006021111D1 (en) |
WO (1) | WO2007004725A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5034860B2 (en) * | 2007-10-22 | 2012-09-26 | パナソニック株式会社 | Hermetic compressor |
EP2195535B1 (en) * | 2007-12-06 | 2018-01-03 | Panasonic Corporation | Hermetic compressor |
JP5338355B2 (en) * | 2009-02-13 | 2013-11-13 | パナソニック株式会社 | Hermetic compressor and refrigeration system |
US20140308141A1 (en) * | 2011-12-26 | 2014-10-16 | Panasonic Corporation | Sealed compressor and refrigerator including sealed compressor |
JP6213470B2 (en) * | 2012-08-17 | 2017-10-18 | 株式会社ニコン | Image processing apparatus, imaging apparatus, and program |
SG10201800146TA (en) * | 2018-01-05 | 2019-08-27 | Panasonic Appliances Refrigeration Devices Singapore | Hermetic compressor and stator insulator |
CN113357127B (en) * | 2021-06-23 | 2022-09-09 | 广州万宝集团压缩机有限公司 | Air suction silencer, compressor and temperature adjusting equipment |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR9102288A (en) * | 1991-05-28 | 1993-01-05 | Brasileira S A Embraco Empresa | SUCTION DIFFERENT SET FOR HERMETIC COMPRESSOR |
US5207564A (en) * | 1992-04-21 | 1993-05-04 | White Consolidated Industries, Inc. | Compressor head and suction muffler for hermetic compressor |
BR9604126A (en) * | 1996-08-21 | 1998-05-26 | Brasil Compressores Sa | Suction damper for hermetic compressor |
JP4232235B2 (en) | 1998-10-23 | 2009-03-04 | パナソニック株式会社 | Scarf |
JP3677447B2 (en) | 2000-11-27 | 2005-08-03 | 松下冷機株式会社 | Hermetic compressor |
US6976060B2 (en) * | 2000-12-05 | 2005-12-13 | Agami Sytems, Inc. | Symmetric shared file storage system |
KR100504983B1 (en) * | 2003-03-12 | 2005-08-01 | 삼성광주전자 주식회사 | A suction muffler for compressor, A compressor and A apparatus having refrigerant cycle circuit |
JP4581354B2 (en) * | 2003-08-26 | 2010-11-17 | パナソニック株式会社 | Hermetic compressor |
WO2005038555A2 (en) * | 2003-09-12 | 2005-04-28 | Aristocrat Technologies Australia Pty Ltd | Communications interface for a gaming machine |
JP2005133707A (en) * | 2003-10-10 | 2005-05-26 | Matsushita Electric Ind Co Ltd | Enclosed compressor |
KR20050059494A (en) * | 2003-12-15 | 2005-06-21 | 삼성광주전자 주식회사 | Hermetic compressor |
-
2005
- 2005-07-06 JP JP2005197179A patent/JP4735084B2/en not_active Expired - Fee Related
-
2006
- 2006-07-03 DE DE602006021111T patent/DE602006021111D1/en active Active
- 2006-07-03 US US11/572,351 patent/US20090004031A1/en not_active Abandoned
- 2006-07-03 WO PCT/JP2006/313626 patent/WO2007004725A1/en active Application Filing
- 2006-07-03 KR KR1020077002435A patent/KR100822577B1/en active IP Right Grant
- 2006-07-03 EP EP06780901A patent/EP1763634B1/en not_active Ceased
- 2006-07-04 CN CN2006101007465A patent/CN1892024B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20090004031A1 (en) | 2009-01-01 |
WO2007004725A1 (en) | 2007-01-11 |
JP4735084B2 (en) | 2011-07-27 |
DE602006021111D1 (en) | 2011-05-19 |
EP1763634A1 (en) | 2007-03-21 |
CN1892024B (en) | 2011-08-17 |
JP2007016646A (en) | 2007-01-25 |
KR100822577B1 (en) | 2008-04-16 |
KR20070061789A (en) | 2007-06-14 |
CN1892024A (en) | 2007-01-10 |
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