EP3421804A1 - Compresseur et pompe à chaleur comportant un tel compresseur - Google Patents

Compresseur et pompe à chaleur comportant un tel compresseur Download PDF

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Publication number
EP3421804A1
EP3421804A1 EP17177913.5A EP17177913A EP3421804A1 EP 3421804 A1 EP3421804 A1 EP 3421804A1 EP 17177913 A EP17177913 A EP 17177913A EP 3421804 A1 EP3421804 A1 EP 3421804A1
Authority
EP
European Patent Office
Prior art keywords
compressor
refrigerant
housing
pump
sump
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.)
Granted
Application number
EP17177913.5A
Other languages
German (de)
English (en)
Other versions
EP3421804B1 (fr
Inventor
Chung Pen Chiu
Shan KE
Jose Antonio Ruiz Bermejo
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.)
BSH Hausgeraete GmbH
Rechi Precision Co Ltd
Original Assignee
BSH Hausgeraete GmbH
Rechi Precision Co Ltd
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 BSH Hausgeraete GmbH, Rechi Precision Co Ltd filed Critical BSH Hausgeraete GmbH
Priority to PL17177913T priority Critical patent/PL3421804T3/pl
Priority to EP17177913.5A priority patent/EP3421804B1/fr
Publication of EP3421804A1 publication Critical patent/EP3421804A1/fr
Application granted granted Critical
Publication of EP3421804B1 publication Critical patent/EP3421804B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • 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
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0261—Hermetic compressors with an auxiliary oil pump
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/809—Lubricant sump
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps

Definitions

  • the invention relates to a compressor for compressing a refrigerant, comprising a housing for containing said refrigerant, a refrigerant pump, said pump disposed within said housing, and a sump for containing an amount of lubricating oil to a predetermined level is defined within said housing separate from said refrigerant pump.
  • the invention also relates to a heat pump including such compressor, and to a laundry dryer including such heat pump.
  • the publication WO 2016/024009 A1 discloses such compressor and also such heat pump.
  • the disclosed compressor is a rotary compressor having a displacement between 5 cm 3 and 10 cm 3 . It may contain a lubricating oil of a type selected from PAG and POE type oils at an amount between 150 cm 3 and 210 cm 3 , and may be dedicated for compressing the refrigerant commonly known as R290 or propane.
  • the compressor may be included in a heat pump comprising in addition a refrigerant condenser for condensing the refrigerant as compressed by the compressor, thereby releasing heat, a restrictor, particularly a capillary, for reducing an internal pressure of the liquid refrigerant, thereby converting it to a two-phase fluid including both liquid and gas, an evaporator for fully evaporating the refrigerant, thereby absorbing heat.
  • the refrigerant is guided through all of these components as detailed in a closed circuit.
  • the amount of refrigerant contained in the heat pump may be restricted to 150 g.
  • the refrigerant commonly known as R1270 or propylene may be used.
  • the heat pump may be comprised in a laundry dryer.
  • a compressor as typically dedicated to use in a laundry dryer heat pump uses refrigerant oil in an amount of 120 cm 3 to 350 cm 3 , depending on the displacement of the pump for compressing the refrigerant in the compressor, this displacement being typically from 2 cm 3 to 25 cm 3 .
  • a compressor with a displacement of 5,5 cm 3 may require some 120 cm 3 of oil, and a compressor with a displacement of 12,4 cm 3 may require an amount of 210 cm 3 .
  • the IEC 60335-2-11 regulation limits the amount of refrigerant to be loaded into a heat pump of a household appliance as a laundry dryer to 150 g for compliance with safety standards.
  • refrigerants like R290 and R1270 have considerable solubilities into usual lubrication oils.
  • a proper relation between the amount of refrigerant and the amount of oil must be retained; a minimum amount of oil being defined by providing oil at a weight which is around 20 % of the sum of the weights of the oil and the refrigerants at least.
  • a compressor for compressing a refrigerant comprising a housing for containing said refrigerant, a refrigerant pump, said pump disposed within said housing, and a sump for containing an amount of lubricating oil to a predetermined level is defined within said housing separate from said refrigerant pump, wherein said housing includes means for reducing the amount of lubricating oil contained in said sump while maintaining said level.
  • the pump is understood to comprise, besides the machine for accomplishing the gas compression process for compressing the refrigerant, a motor, in particular an electric motor that drives that machine.
  • said means include a solid insert placed within the sump below the level, thereby filling up a considerable portion of the volume defined by the sump and reducing the necessity to use oil in excess of the minimum amount required for mere filling the sump.
  • Such insert may be manufactured from any material suitable for being retained in the compressor at the given operating conditions and appropriate for mass production, for example by die-casting. Such material may be a cheap metal like an appropriately selected aluminum alloy or even plastic, and may be added to the compressor within a just slightly modified mass production process.
  • alternative methods for die-casting include, depending on the material selected, injection molding, and compression molding, both with using plastic material, and powder metallurgy, forging, and sheet-metal forming, these three with using metal material. It is also noted that the insert may be composed of several components which are put together prior to or upon manufacturing the compressor.
  • the said insert is fixed to the pump, or alternatively to the housing, and more specifically to a lower cap of the housing and closing the housing at a bottom side.
  • a lower cap may have a semi-spherical or semi-ellipsoidal shape.
  • fixing may be accomplished by one of a rivet, a clamp, and a weld.
  • the insert may be dipping into the sump particularly by being attached to the pump, with also the pump extending below the predetermined level. This may assist for transferring lubricant oil into the pump, and avoid special lubricating means separate from the pump for providing proper lubrication to the pump.
  • the insert also allows keeping essentially all other components of the compressor without changes in shape, thus possibly retaining an original and approved design.
  • the insert may be applied with a lower cap of the housing that defines the sump at least to a major extent, and that is being left with a shape according to its original design.
  • said insert has a volume of more than 50 % of a volume of said sump.
  • an insert may be used in a compressor with a diameter of 106 mm, and a sump below a suction tube of the pump extending to 27 mm down from the tube to a spherical cap of the housing, the original sump volume of about 130 cm 3 could be filled with some 70 cm 3 by an insert, leaving a volume of just 60 cm 3 to be filled with lubricating oil.
  • a further preferred embodiment of the invention provides that said means include a cap that closes said housing around said sump, and said cap is shaped conformant to components placed within said housing and located above said sump. Accordingly departure is made from shaping such lower cap of a housing simply spherical as may appear to be expedient in view of mechanical strain by the pressure difference across the housing, and a shape is provided that conforms to the components located proximate to the cap within the housing, thus ascertaining a specifically low free volume for containing a liquid as lubricating oil.
  • the modified cap may feature the shape adapted in accordance with the invention on its inside only, thereby retaining its external spherical shape and replacing an insert made separately, or it may feature the shape adapted also on its outside. Thereby the manufacturing process may be retained with a minimum of modifications if any.
  • the lubricating oil is selected from the group consisting of PAG oil, mineral oil, POE oil, and PVE oil. Particularly preferred may be the oil denoted as PAG-100S.
  • the pump has a displacement between 2 cm 3 and 25 cm 3 .
  • the amount of lubricating oil is between 30 cm 3 and 120 cm 3 .
  • a heat pump including a refrigerant evaporator, a compressor, a refrigerant condenser, and a refrigerant restrictor, all connected in series within a closed loop containing a refrigerant for circulation, wherein said compressor is in accordance with the invention or its preferred embodiments as described hereinabove.
  • the refrigerant is R290.
  • Alternatives to R290 may be R1270 and R32.
  • the refrigerant is contained in an amount not exceeding 150 g.
  • This embodiment makes specific use of the advantage obtained by reducing the amount of refrigerant dissolved in the lubricating oil, thus retaining a particularly large amount of the refrigerant for operating the heat pump process.
  • the heat pump according to the invention or a preferred embodiment thereof as described hereinabove is comprised in a laundry dryer.
  • a laundry dryer may be dedicated to being used in a private household as a household appliance, by drying an amount of wet laundry of some 5 kg to 12 kg during a process time interval of 2 hours to 3 hours.
  • the invention may also be applied to a variety of other household appliances including, but not limited to, dishwashers and air conditioners for household use.
  • Fig. 1 shows a schematic representation of a laundry dryer 1, the laundry dryer 1 to be understood also as a representative of any household appliance.
  • This dryer 1 comprises a rotatable drum 2 for holding laundry 3 to be dried by process air that is conveyed by a process air guide 4 by some blower means not shown for clarity.
  • the dryer 1 as shown by Fig. 1 is a tumble dryer 1 specifically dedicated to drying wet laundry 3.
  • the dryer may also be understood to be a combination machine dedicated both to washing laundry 3 and drying laundry 3.
  • the drum 2 may be permeable by washing suds or rinsing suds, and held in a closed tub which in its turn contains such suds.
  • means for entering and removing suds have to be present, as means for allowing the drum 2 to rotate very fast in order to extract suds from the laundry by centrifugation. All of these means are known as such, and are not displayed in Fig. 1 for clarity.
  • the process air guide 4 is essentially closed in itself for circulating a flow of process air, thus defining a condensation-type dryer 1 which relies on extracting humidity from the laundry 3 to be dried by heated process air, and cooling process air after saturation with humidity for extracting the humidity by condensation. Subsequently the process air is heated again and recirculated to the laundry 3.
  • an open process air guide 4 may also be considered.
  • Such open process air guide 4 would have to include some heating means, but would not necessarily include cooling means for extracting humidity from the process air. Rather the saturated process air could simply be vented from the dryer 1. This would define a vented-type dryer 1.
  • the innovation to be described subsequently imposes not necessarily a requirement for a specific type of dryer 1. Thus the following description will focus on a condensation-type dryer 1 as a model without any intent or implication to define a limitation.
  • the dryer 1 includes a heat pump 5, 6, 7, 8, 9 of the compressor type and implementing a reverse Rankine process to provide cyclic heating and cooling of process air circulating.
  • a heat exchanger or heat source and also termed condenser 5 serves to heat process air flowing through by liquefying a circulating refrigerant which is R290 (alternatively R1270 or R32) and present in a total amount of 150 g in accordance with the IEC 60335-2-11 regulation, and another heat exchanger or heat sink and also termed evaporator 6 serves to cool process air flowing through by evaporating the circulating refrigerant.
  • the refrigerant circulates within a refrigerant circuit closed in itself.
  • the refrigerant enters the evaporator 5 from a restrictor 8 embodied as a capillary or valve and dedicated to reduce the internal pressure of the refrigerant in its liquid phase, thereby creating a dual-phase mixture of liquid and gas, and is fully evaporated in the evaporator 5 by absorbing heat from the process air. Subsequently the gaseous refrigerant passes to the compressor 9 for being compressed to an increased internal pressure, thereby being also heated adiabatically. The compressed gaseous refrigerant then passes to the condenser 6, and is liquefied by releasing heat to the process air. From the condenser 6 the refrigerant returns to the restrictor 8, thereby closing its cycle.
  • a restrictor 8 embodied as a capillary or valve and dedicated to reduce the internal pressure of the refrigerant in its liquid phase, thereby creating a dual-phase mixture of liquid and gas, and is fully evaporated in the evaporator 5 by absorbing heat from the process air.
  • the compressor 9 now comprises a pump 10 which serves to compressing the refrigerant and includes an electric motor for driving the pump 10 and not shown for clarity, and a housing which encloses all functional components of the compressor 9 and is hermetically sealed.
  • the pump 10 may be a rotary pump, and have a displacement between 2 cm 3 and 25 cm 3 .
  • a lower bound of the housing 11 is given by a lower cap 12.
  • the pump 10 may by partially immersed in the lubricating oil, or some means for sucking lubricating oil from the sump 13 may dip into the sump 13.
  • the amount of lubricating oil to be provided in a compressor 9 depends on multiple conditions, some of them being geometric realities like the position of the predetermined level 14 and the geometry of the housing 11 including its lower cap 12 and defining the sump 13, and another being a requirement of providing at least a minimum amount of lubricating oil in relation to the amount of refrigerant in the refrigerant circuit 7. Defining this minimum amount at 20 % to 22 % of the amount of refrigerant which is 150 g, the minimum amount would be 38 g to 42 g, equating for PAG-100S type oil 38 cm 3 to 42 cm 3 .
  • compressors 9 In usual practice of designing compressors 9 however the specified minimum amount will be grossly exceeded, by requiring lubricating oil in amounts of 130 cm 3 or even 250 cm 3 . Taking now into account that a considerable amount of refrigerant will be dissolved in the lubricating oil, in particular to some 30 % of the amount of the oil, it follows that a heat pump 5, 6, 7, 8, 9 including such compressor 9 may face a problem in view of the limited total amount of refrigerant. With the data presented above, this may be a quantity from 40 g of refrigerant at 120 g of oil to even 60 g of refrigerant at 200 g of oil.
  • the present innovation provides for reducing dissolution of refrigerant into lubricating oil by reducing the amount of oil to be provided in a compressor 9. According exemplary solutions are shown in Figures 2 to 11 .
  • Fig. 2 shows a lower part of a compressor 9 including the pump 10 placed in the housing 11.
  • the housing 11 is essentially cylindrical and terminates in a lower cap 12 inserted into and fixed to the housing's 11 cylindrical portion.
  • the lower cap 12 bulges outside slightly in order to accommodate the operational pressure difference between the inside and the outside of the housing 11.
  • the compressor 9 also includes an insert 15 made of die-cast material and fixed, in this case bolted, to the pump 10. With the pump 10 this insert 15 will dip into the sump 13 formed in the lower part of the housing 11, and thus allow for providing a much lower amount of lubricating oil in the sump 13 for reaching a predetermined level 14.
  • the insert 15 has a volume of more than 50 % of a volume of said sump 13, as may be inferred from Fig 2 easily.
  • the insert 15 is used in a compressor 9 with a diameter of 106 mm, and a sump 13 below a suction tube 16 of the pump 10 extending to 27 mm down from the tube to the lower cap 12. Thereby the original sump volume of about 130 cm 3 may even be filled with some 70 cm 3 by the insert 15, leaving a volume of just 60 cm 3 to be filled with lubricating oil.
  • insert 15 alternative methods for die-casting include, depending on the material selected, injection molding, and compression molding, both with using plastic material, and powder metallurgy, forging, and sheet-metal forming, these three with using metal material. It is also noted that the insert 15 may be composed of several components which are put together prior to or upon manufacturing the compressor 9.
  • Fig. 3 The configuration of Fig. 3 is much similar to the configuration of Fig. 2 except for the insert 15 being riveted to the lower cap 12 by rivets 19.
  • Fig. 4 is much similar to the configuration of Fig. 2 except for the insert 15 being press-fitted to the cylindrical portion of the housing 11 below the pump 10.
  • the insert 15 is fitted to the lower cap 12 which in its turn is fixed to the cylindrical portion of the housing 11 by a circumferential weld 18.
  • a rim portion of the lower cap 12 is bent inwards somewhat for forming a clamp 21 that fixes the insert 15 to the lower cap 12.
  • the insert 15 has a spring element 17 which fixes it to the lower cap 12.
  • the lower cap 12 is again fixed to the cylindrical portion of the housing 11 by a weld 18.
  • the insert 15 is made from metal that can be welded, and is fixed to the circumference of the lower cap 12 by a weld 18.
  • the insert 15 is made by molding from a suitable plastic material.
  • the insert 15 is molded around a metal ring 20, which in its turn is fixed to the lower cap 12 by a circumferential weld 18.
  • the insert 15 is formed directly within the lower cap 12, and concurrently bonded to the lower cap 12, by molding. It is noted that by providing the insert 15 directly on its inside the lower cap 12 features the shape adapted in accordance with the invention on its inside only, thereby retaining its external spherical shape. Thereby the functional features of the cap as regards resistance to operational pressure differences and manufacturing process are retained with a minimum of modifications.
  • the combination of the lower cap 12 and the insert 15 is shaped towards the inside of the housing 11 conformant to components including the pump 10 and the suction pipe 16 placed within the housing 11, and located above the sump 13.
  • this feature is implemented in a different manner by replacing the original spherical lower cap 12 by a novel lower cap 12a which may be manufactured from sheet stock as the lower cap 12 in the embodiments described hereinabove but which is shaped in its entirety conformant to the components including in the present case a lower flange 22 surrounding the suction tube 16 and a shaft 23 placed within the housing 12 and located above the sump 13.
  • a general advantage of all embodiments is the reduction of amount of refrigerant dissolved in the lubricating oil, thus saving considerable amounts of refrigerant for performing the heat pump process. This provides for an increased mass flow through the heat pump 5, 6, 7, 8, 9 (see Fig. 1 ), and thus for improved performance.
  • the amount of refrigerant dissolved in the lubricating oil of type PAG-100S be reduced to 24 g, in comparison to a dissolved amount of 63 g in a heat pump of equal construction and dimensions except for replacing the innovative compressor 9 by a conventional one.
  • the reason is that by using an insert 15 as disclosed herein the total amount of lubricating oil to be provided in the compressor 9 could be reduced from 210 g to 80 g.
  • the invention provides for a compressor, and a heat pump including such compressor, and a laundry dryer including such heat pump, wherein a particularly high fraction of the total amount of the refrigerant is available for performing the heat pump process.
  • a flammable refrigerant like R290, R1270, and R32, and used in a heat pump of a household appliance wherein the total amount of refrigerant is limited due to pertinent regulation, such as 150 g of refrigerant as allowed by the IEC 60335-2-11 regulation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
EP17177913.5A 2017-06-26 2017-06-26 Sèche-linge comportant une pompe à chaleur Active EP3421804B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL17177913T PL3421804T3 (pl) 2017-06-26 2017-06-26 Suszarka do prania zawierająca pompę ciepła
EP17177913.5A EP3421804B1 (fr) 2017-06-26 2017-06-26 Sèche-linge comportant une pompe à chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17177913.5A EP3421804B1 (fr) 2017-06-26 2017-06-26 Sèche-linge comportant une pompe à chaleur

Publications (2)

Publication Number Publication Date
EP3421804A1 true EP3421804A1 (fr) 2019-01-02
EP3421804B1 EP3421804B1 (fr) 2021-04-21

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EP (1) EP3421804B1 (fr)
PL (1) PL3421804T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024057438A1 (fr) * 2022-09-14 2024-03-21 三菱電機株式会社 Compresseur, dispositif à cycle de réfrigération, et procédé de fabrication de compresseur

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1047267A (ja) * 1996-07-29 1998-02-17 Matsushita Refrig Co Ltd スクロール圧縮機
US20030010573A1 (en) * 2001-07-14 2003-01-16 Kueon Young-Su Oil pickup apparatus for hermetic compressor
JP2009002287A (ja) * 2007-06-25 2009-01-08 Panasonic Corp 密閉型圧縮機
WO2011148453A1 (fr) * 2010-05-24 2011-12-01 三菱電機株式会社 Compresseur rotatif à deux étages et appareil de pompe à chaleur
EP2514972A1 (fr) * 2010-01-29 2012-10-24 Sanden Corporation Machines a fluide
WO2016024009A1 (fr) 2014-08-14 2016-02-18 BSH Hausgeräte GmbH Compresseur rotatif, pompe a chaleur et appareil electromenager

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1047267A (ja) * 1996-07-29 1998-02-17 Matsushita Refrig Co Ltd スクロール圧縮機
US20030010573A1 (en) * 2001-07-14 2003-01-16 Kueon Young-Su Oil pickup apparatus for hermetic compressor
JP2009002287A (ja) * 2007-06-25 2009-01-08 Panasonic Corp 密閉型圧縮機
EP2514972A1 (fr) * 2010-01-29 2012-10-24 Sanden Corporation Machines a fluide
WO2011148453A1 (fr) * 2010-05-24 2011-12-01 三菱電機株式会社 Compresseur rotatif à deux étages et appareil de pompe à chaleur
WO2016024009A1 (fr) 2014-08-14 2016-02-18 BSH Hausgeräte GmbH Compresseur rotatif, pompe a chaleur et appareil electromenager

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024057438A1 (fr) * 2022-09-14 2024-03-21 三菱電機株式会社 Compresseur, dispositif à cycle de réfrigération, et procédé de fabrication de compresseur

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Publication number Publication date
PL3421804T3 (pl) 2021-11-15
EP3421804B1 (fr) 2021-04-21

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