EP3633192A1 - Compresseur frigorifique - Google Patents

Compresseur frigorifique Download PDF

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Publication number
EP3633192A1
EP3633192A1 EP18198034.3A EP18198034A EP3633192A1 EP 3633192 A1 EP3633192 A1 EP 3633192A1 EP 18198034 A EP18198034 A EP 18198034A EP 3633192 A1 EP3633192 A1 EP 3633192A1
Authority
EP
European Patent Office
Prior art keywords
unit
refrigerant
piston
refrigerant compressor
functional surface
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.)
Withdrawn
Application number
EP18198034.3A
Other languages
German (de)
English (en)
Inventor
Alfred Freiberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Secop Austria GmbH
Original Assignee
Nidec Global Appliance Austria GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nidec Global Appliance Austria GmbH filed Critical Nidec Global Appliance Austria GmbH
Priority to EP18198034.3A priority Critical patent/EP3633192A1/fr
Priority to US16/584,424 priority patent/US20200102945A1/en
Priority to CN201910948532.0A priority patent/CN110966158A/zh
Publication of EP3633192A1 publication Critical patent/EP3633192A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0083—Pulsation and noise damping means using blow off silencers
    • 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
    • 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
    • F04B39/0033—Pulsation and noise damping means with encapsulations
    • 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
    • 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
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001—Noise damping
    • 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
    • F04B39/0005—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 adaptations of pistons
    • 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
    • F04B39/122—Cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/123—Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F04C29/068—Silencing the silencing means being arranged inside the pump housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0403—Refractory metals, e.g. V, W
    • F05C2201/0406—Chromium

Definitions

  • the present invention relates to a refrigerant compressor comprising an electric drive unit, a piston-cylinder unit which can be driven by the drive unit for the cyclical compression of refrigerant and at least one refrigerant-permeable, at least one damping chamber having a silencer unit made of a thermoplastic, the at least one silencer -The unit is connected to the piston-cylinder unit in order to enable an exchange of refrigerant between the soundproofing unit and the piston-cylinder unit.
  • Hermetically sealed refrigerant compressors have been known for a long time and are mainly used in refrigerators or shelves.
  • the refrigerant process as such has also been known for a long time.
  • Refrigerant is heated by energy absorption from the room to be cooled in an evaporator and finally overheated and pumped to a higher pressure level by means of the refrigerant compressor with a piston-cylinder unit, where it emits heat via a condenser and a throttle, in which a pressure reduction and the cooling of the refrigerant takes place, is conveyed back into the evaporator.
  • the (gaseous) refrigerant is drawn in via a suction pipe coming directly from the evaporator during a suction stroke of the piston-cylinder unit.
  • the suction pipe opens in known hermetically encapsulated refrigerant compressors, as a rule, into the hermetically encapsulated compressor housing - usually near an inlet of a suction muffler, from where the refrigerant flows into the suction muffler and through this to an intake valve of the piston-cylinder unit.
  • This means that the suction muffler is located in front of the piston-cylinder unit when viewed in the direction of flow and serves primarily to keep the noise level of the refrigerant compressor as low as possible during the intake process.
  • the refrigerant heats up considerably on its way through the suction muffler to the piston-cylinder unit. This is due to the heating of the interior of the compressor housing, which mainly takes place due to the compressed refrigerant discharged in the pressure silencer.
  • the compressed refrigerant discharged in the pressure silencer has temperatures of up to 180 ° C and thus represents a significant heat source. This leads to heating of the interior of the compressor housing and more follow to heat transfer to the refrigerant in the suction muffler.
  • the object stated at the outset is comprised of an electric drive unit, a piston-cylinder unit which can be driven by means of the drive unit for the cyclical compression of refrigerant and at least one soundproofing unit made of a thermoplastic material and having at least one damping chamber through which refrigerant can flow, wherein the at least one silencing unit is connected to the piston-cylinder unit in order to enable an exchange of refrigerant between the silencing unit and the piston-cylinder unit, solved according to the invention in that the at least one silencing unit has a functional surface at least in sections has, wherein the functional surface is designed such that a The emissivity of a section of the sound damping unit having the functional surface is less than 0.7, preferably less than 0.5, particularly preferably less than 0.1.
  • the functional surface which is present at least in sections, reduces the heat radiation and / or heat absorption by radiation on the at least one soundproofing unit.
  • the at least one sound absorption unit has a reduced emissivity in those areas in which the functional surface is present.
  • the emissivity of the at least one sound absorption unit indicates how much radiation the at least one sound absorption unit emits in comparison to an ideal heat radiator, a black body. I.e. the at least one sound absorption unit has a reduced heat radiation and / or heat absorption by radiation in those areas in which the functional surface is present compared to surface sections without a functional surface. This reduces the temperature inside a compressor housing. This means that the refrigerant compressor according to the invention has a better efficiency.
  • the functional surface can either be formed on an outer surface of the at least one sound-absorbing unit, the outer surface facing the interior of the compressor housing, or on an inner surface of the at least one sound-absorbing unit, the inner surface on the inside of the at least one sound-absorbing unit , in particular facing the at least one damping chamber.
  • radiation emission and absorption correspond to each other at a given wavelength. This means that the functional surface, in addition to reduced heat radiation, also leads to reduced heat absorption.
  • the at least one sound absorption unit is manufactured using an injection molding process. Such a manufacturing process is characterized by its particular economy.
  • the functional surface is polished in order to achieve a particularly low emissivity.
  • thermoplastic comprises additives, for example aluminum and / or chromium.
  • the functional surface is at least partially formed by a surface section of a solid material of the at least one silencing unit, and no additional coating is necessary (although such is also not excluded). It would also be conceivable for the additives to be present only in areas of the solid material of the sound-absorbing unit that are close to the surface.
  • a refrigerant compressor comprising an electric drive unit, one which can be driven by means of the drive unit Piston-cylinder unit for the cyclical compression of refrigerant and at least one sound-absorbing unit made of a thermoplastic material, through which refrigerant can flow and at least one damping chamber, wherein the at least one sound-absorbing unit is connected to the piston-cylinder unit in order to exchange
  • the thermoplastic comprises additives, such as aluminum and / or chromium, the heat radiation of a soundproofing unit made of thermoplastic with additives compared to a soundproofing unit made of thermoplastic is reduced without additives.
  • the heat radiation or absorption can additionally be reduced if the surface of the solid material of the at least one soundproofing unit made of thermoplastic material is polished.
  • the functional surface is only formed by polishing. I.e. In this case, the functional surface is also formed when the thermoplastic does not have any additives.
  • the functional surface is designed as a metallic layer.
  • a metallic layer as a functional surface is characterized by a low emission coefficient, especially when the metallic layer is polished.
  • the functional surface is preferably a non-metallic layer is designed as a ceramic layer with a low emission coefficient.
  • the at least one soundproofing unit is completely encased in the metallic layer.
  • the temperature within the compressor housing is significantly reduced, since the heat absorption or heat emission of the at least one soundproofing unit is reduced.
  • a sheathing of the at least one soundproofing unit by the metallic layer is particularly simple and inexpensive to manufacture.
  • the metallic layer can also be arranged on the inner surface facing the interior of the at least one sound absorption unit.
  • the metallic layer contains chromium and / or aluminum. Both chrome and aluminum, especially with a polished surface, have low emissivity and absorption levels, which is why they are excellent components of the metallic layer.
  • the chromium and / or aluminum-containing layer prefferably have an emissivity between 0.1 and 0.02 in the polished state.
  • the metallic layer comprises other constituents in addition to chrome and / or aluminum. It is preferably provided in the refrigerant compressor according to the invention that the metallic layer is designed as a metallic foil.
  • the metallic layer in the form of a metallic foil is characterized by a particularly good reduction in heat radiation and heat absorption and is easy to apply.
  • the at least one sound absorption unit can be obtained by back-injection of the metallic foil, i.e. the metallic foil is back-injected with the thermoplastic.
  • the film is fed to an injection molding tool.
  • the thermoplastic material is then injected into the injection mold, the thermoplastic material and the film joining together. It is advantageous that the back molding can be fully automated and that no adhesive is required for the connection between the thermoplastic and the film.
  • the metallic layer is applied and / or varnished and / or glued and / or galvanized onto the at least one sound absorption unit.
  • the metallic layer is applied in a simple manner on the at least one soundproofing unit.
  • Electroplating in particular can be automated easily and the coating produced by means of electroplating is characterized by low costs and fast producibility.
  • the at least one sound damping unit or one of the sound damping units is designed as a suction sound damper arranged in the flow direction upstream of the piston-cylinder unit.
  • the functional surface Since the at least one suction muffler is arranged inside the compressor housing in the flow direction in front of the piston-cylinder unit, the functional surface must have a low degree of absorption. This is because otherwise the refrigerant inside the suction muffler due to the high temperatures inside the compressor housing - i.a. due to the compressed refrigerant discharged in the pressure pipe - is present.
  • the functional surface is thus preferably formed on the outer surface of the suction muffler facing the interior of the compressor housing and leads to an improved efficiency of the refrigerant compressor according to the invention, since the temperature of the refrigerant inside the suction muffler is not increased by a higher temperature inside the compressor housing. because the heat radiation from the functional surface is essentially reflected back into the compressor housing.
  • the functional surface can also be formed on the inner surface facing the interior of the suction muffler and thereby lead to an improved efficiency of the refrigerant compressor according to the invention.
  • the at least one silencing unit or at least one of the silencing units behind as in the flow direction the piston-cylinder unit arranged pressure silencer is formed.
  • the functional surface Since the at least one pressure silencer, preferably inside the compressor housing, is arranged in the flow direction behind the piston-cylinder unit, the functional surface must have a low emissivity. This is because the refrigerant after the piston-cylinder unit enters the at least one pressure silencer due to the compression at a high temperature and heats it up accordingly.
  • the functional surface is preferably formed on the inner surface facing the interior of the pressure muffler and leads to an improved efficiency of the refrigerant compressor according to the invention, since temperature increases inside the compressor housing are reduced because the heat radiation of the refrigerant from the functional surface essentially into the interior of the Pressure silencer is reflected back.
  • the functional surface can also be formed on the outer surface of the pressure muffler facing the interior of the compressor housing and thereby lead to an improved efficiency of the refrigerant compressor according to the invention.
  • the Fig. 1 shows a sectional view of a known refrigerant compressor 1.
  • the refrigerant compressor 1 comprises a compressor housing 8, a drive unit 2, a piston-cylinder unit 3, in which the cyclical compression of a refrigerant takes place, and at least one sound absorption unit 4.
  • the at least one silencing unit 4 can be a suction silencer 6 and / or one Act pressure silencer 7.
  • the suction muffler 6 is arranged in front of the piston-cylinder unit 3 in the flow direction of the refrigerant, while the pressure muffler 7 is located behind the piston-cylinder unit 3 in the flow direction of the refrigerant.
  • the refrigerant is heated undesirably. This is due to the heating of the interior of the compressor housing 8, which among other things. due to the compressed refrigerant discharged in the pressure silencer 7.
  • the compressed refrigerant discharged in the pressure silencer 7 sometimes has temperatures of up to 180 ° C. and thus represents a significant heat source. This leads to heating of the interior of the compressor housing 8 and subsequently to heat transfer to the refrigerant located in the suction silencer 6 .
  • suction muffler 6 as well as in 4 and 5 shown pressure silencer 7 with a functional surface 11, which is preferably designed as a metallic layer 5, provided.
  • Fig. 2 shows a front view of the suction muffler 6 having the functional surface 11, while Fig. 3 a sectional view of the suction muffler 6 from Fig. 2 according to the in Fig. 2 drawn section line AA represents.
  • the suction muffler 6 has at least one damping chamber 9, but preferably a plurality of damping chambers 9. In Fig. 3 it can be seen that the suction muffler 6 is completely covered with the metallic layer 5.
  • the metallic layer 5 preferably contains aluminum and is particularly preferably designed as a film which is applied to the suction muffler 6.
  • the metallic layer 5 on the suction muffler 6 is polished in the exemplary embodiment shown, which is why it has a particularly well reflecting surface.
  • the metallic layer 5 thus has a low degree of absorption, which is why the refrigerant inside the suction muffler 6 is hardly or not at all heated by the higher temperatures which can prevail inside the compressor housing 8.
  • Fig. 4 shows a front view of the pressure muffler 7 having the functional surface 11, while Fig. 5 a sectional view of the pressure muffler 7 from Fig. 4 according to the in Fig. 4 drawn section line BB represents.
  • the pressure silencer 7 has at least one damping chamber 10, but preferably a plurality of damping chambers 10. In Fig. 5 it can be seen that the pressure silencer 7 is completely encased in the metallic layer 5.
  • the metallic layer 5 preferably contains aluminum and is particularly preferably in the form of a film which is applied to the pressure silencer 7.
  • the metallic layer 5 on the pressure silencer 7 is polished in the exemplary embodiment shown, which is why it has a particularly well reflecting surface.
  • the metallic layer 5 thus has a low emissivity, which is why the high temperature of the compressed refrigerant is hardly or not at all transferred to the interior of the compressor housing 8. I.e. the metallic layer 5 on the at least one pressure silencer 7 reduces or prevents heat radiation.
  • the refrigerant compressor 1 With the aid of the refrigerant compressor 1 according to the invention, temperature increases in the interior of the compressor housing 8 are thus reduced, as a result of which the refrigerant temperature in particular is kept as low as possible at the beginning of the compression process and thus necessarily also when the cylinder-piston unit 3 is drawn into the cylinder. The consequence of this is that the refrigerant compressor 1 according to the invention has a better efficiency than a known refrigerant compressor 1.
EP18198034.3A 2018-10-01 2018-10-01 Compresseur frigorifique Withdrawn EP3633192A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18198034.3A EP3633192A1 (fr) 2018-10-01 2018-10-01 Compresseur frigorifique
US16/584,424 US20200102945A1 (en) 2018-10-01 2019-09-26 Refrigerant compressor
CN201910948532.0A CN110966158A (zh) 2018-10-01 2019-10-08 制冷剂压缩机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18198034.3A EP3633192A1 (fr) 2018-10-01 2018-10-01 Compresseur frigorifique

Publications (1)

Publication Number Publication Date
EP3633192A1 true EP3633192A1 (fr) 2020-04-08

Family

ID=63720614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18198034.3A Withdrawn EP3633192A1 (fr) 2018-10-01 2018-10-01 Compresseur frigorifique

Country Status (3)

Country Link
US (1) US20200102945A1 (fr)
EP (1) EP3633192A1 (fr)
CN (1) CN110966158A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112392690A (zh) * 2020-10-26 2021-02-23 杭州钱江制冷压缩机集团有限公司 一种压缩机消音器及压缩机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3215586A1 (de) * 1981-04-29 1982-11-18 White Consolidated Industries, Inc., 44111 Cleveland, Ohio Kuehlkompressor mit einem schalldaempfersystem
US20040234386A1 (en) * 2003-05-19 2004-11-25 Chumley Eugene Karl Discharge muffler having an internal pressure relief valve
EP2631577A2 (fr) * 2012-02-27 2013-08-28 Liebherr-Hausgeräte Ochsenhausen GmbH Appareil de réfrigération et/ou de congélation
EP2796716A2 (fr) * 2013-04-24 2014-10-29 LG Electronics, Inc. Silencieux pour compresseur et compresseur le comprenant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3215586A1 (de) * 1981-04-29 1982-11-18 White Consolidated Industries, Inc., 44111 Cleveland, Ohio Kuehlkompressor mit einem schalldaempfersystem
US20040234386A1 (en) * 2003-05-19 2004-11-25 Chumley Eugene Karl Discharge muffler having an internal pressure relief valve
EP2631577A2 (fr) * 2012-02-27 2013-08-28 Liebherr-Hausgeräte Ochsenhausen GmbH Appareil de réfrigération et/ou de congélation
EP2796716A2 (fr) * 2013-04-24 2014-10-29 LG Electronics, Inc. Silencieux pour compresseur et compresseur le comprenant

Also Published As

Publication number Publication date
CN110966158A (zh) 2020-04-07
US20200102945A1 (en) 2020-04-02

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