WO2020166285A1 - Compresseur - Google Patents

Compresseur Download PDF

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Publication number
WO2020166285A1
WO2020166285A1 PCT/JP2020/002079 JP2020002079W WO2020166285A1 WO 2020166285 A1 WO2020166285 A1 WO 2020166285A1 JP 2020002079 W JP2020002079 W JP 2020002079W WO 2020166285 A1 WO2020166285 A1 WO 2020166285A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
passage
oil supply
refrigerant
compression
Prior art date
Application number
PCT/JP2020/002079
Other languages
English (en)
Japanese (ja)
Inventor
弘丞 小笠原
Original Assignee
パナソニックＩｐマネジメント株式会社
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 パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2020166285A1 publication Critical patent/WO2020166285A1/fr

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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
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • 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

Definitions

  • the present disclosure relates to a compressor.
  • a compressor having a rotary compression element that compresses a refrigerant is known.
  • the oil stored in the closed container is supplied to the rotary compression element in order to seal the compression chamber in the rotary compression element.
  • the supplied oil mixes with the refrigerant.
  • the refrigerant is directly discharged to the outside of the closed container, so that the oil mixed in the refrigerant is discharged to the outside of the closed container.
  • Patent Document 1 has an oil separation mechanism inside the rotary compression element, and the oil separation mechanism separates the refrigerant and the oil to reduce the amount of oil discharged to the outside of the closed container.
  • the oil separation mechanism separates the refrigerant and the oil to reduce the amount of oil discharged to the outside of the closed container.
  • an oil separator is provided outside the closed container to return the oil separated by the oil separator into the closed container.
  • the oil supply in the second-stage rotary compression element may be excessive, which may increase the amount of oil discharged to the outside of the closed container.
  • An object of the present disclosure is to provide a compressor capable of optimizing the amount of oil supplied to the second-stage compression chamber and reducing the amount of oil discharged to the outside of a closed container.
  • the compressor according to the present disclosure is A hermetic container, a multi-stage compression type compressor that is housed in the hermetic container and includes a rotary compression mechanism that compresses a refrigerant, The rotary compression mechanism, A first compression unit that introduces the refrigerant and compresses the refrigerant; A second compression unit that introduces the refrigerant compressed by the first compression unit, compresses the refrigerant, and discharges the refrigerant to the outside of the closed container; An oil supply part for supplying oil into the compression chamber of the second compression part; Have At least one of the oil supply section and the second compression section has a communication path that connects the oil supply path of the oil supply section and the oil introduction path of the second compression section.
  • FIG. 1 is a vertical cross-sectional view showing an aspect of the compressor 10 according to the embodiment of the present disclosure.
  • the compressor 10 is, for example, a rotary compressor of an internal intermediate pressure type multi-stage compression type that uses carbon dioxide or the like as a refrigerant, and includes a closed container 12, an electric motor 14, and a rotary compression mechanism 18. ..
  • the closed container 12 has a main body portion 12A, a lid portion 12B, and a bottom portion 12C.
  • the main body 12A has a cylindrical shape, and houses the electric motor 14 and the rotary compression mechanism 18 therein.
  • a first introduction pipe 94 and a second introduction pipe 92 for introducing the refrigerant and a discharge pipe 96 for discharging the compressed refrigerant to the outside of the machine are provided near the lower end of the closed container 12.
  • the lid 12B is provided so as to close the upper opening of the main body 12A.
  • a circular mounting hole 12D is formed in the center of the upper surface of the lid portion 12B.
  • a terminal 20 for supplying electric power to the electric motor 14 is attached to the attachment hole 12D.
  • the bottom portion 12C is provided so as to close the lower opening of the main body portion 12A.
  • the internal space of the bottom portion 12C is an oil storage portion T for storing oil (for example, PAG (polyalkylene glycol)).
  • the electric motor 14 is, for example, a DC motor, and is provided in the upper space of the main body 12A.
  • the electric motor 14 has a stator 22 and a rotor 24.
  • the stator 22 is configured in an annular shape and is provided along the peripheral surface without the main body 12A.
  • the rotor 24 is provided inside the stator 22 and has the rotating shaft 16.
  • the rotating shaft 16 is provided on the rotor 24 so as to pass through the center of the rotor 24, and extends in the up-down direction from the main body portion 12A to the bottom portion 12C of the closed container 12.
  • the rotary compression mechanism 18 is provided in the lower space of the main body portion 12A, and has a first rotary compression element 32, a second rotary compression element 34, an intermediate partition plate 36, an upper support member 54, and a lower support member. 56 and.
  • the first rotary compression element 32 corresponds to the “first compression section” of the present disclosure.
  • the second rotary compression element 34 corresponds to the “second compression unit” of the present disclosure.
  • the first rotary compression element 32 and the second rotary compression element 34 are provided so as to sandwich the intermediate partition plate 36 from above and below.
  • the first rotary compression element 32 is provided below the intermediate partition plate 36, and the second rotary compression element 34 is provided above the intermediate partition plate 36.
  • the first rotary compression element 32 has a cylinder 40, a roller 48, and a vane (not shown).
  • the second rotary compression element 34 is disposed above the first rotary compression element 32, and has a cylinder 38, a roller 46, and a vane (not shown).
  • the cylinders 38 and 40 are formed in a cylindrical shape and have a compression chamber that compresses the refrigerant.
  • the rotary shaft 16 is passed through each compression chamber.
  • rollers 46 and 48 are respectively arranged in the compression chambers of the cylinders of the corresponding rotary compression elements, and are arranged in the eccentric portions 42 and 44 provided on the rotary shaft 16 supported by the upper support member 54 and the lower support member 56. By being fitted, each compression chamber rotates eccentrically.
  • the vane is provided so that the biasing member constantly presses the rollers 46 and 48 in a predetermined direction.
  • the compression chambers of the cylinders 38, 40 are divided into a high pressure chamber and a low pressure chamber.
  • the intermediate partition plate 36 closes the upper opening of the cylinder 40 of the first rotary compression element 32 and closes the lower opening of the cylinder 38 of the second rotary compression element 34. Further, the rotary shaft 16 is passed through the center of the intermediate partition plate 36.
  • An oil passage 131 extends from the inner peripheral surface toward the outer peripheral surface on the inner peripheral surface of the hole through which the rotary shaft 16 is inserted in the intermediate partition plate 36.
  • the oil passage 131 is a passage into which the oil supplied into the cylinder 38 of the second rotary compression element 34 is introduced.
  • the intermediate partition plate 36 corresponds to the “oil supply unit” of the present disclosure. The oil supply structure for the cylinder 38 of the second rotary compression element 34 will be described later.
  • the upper support member 54 and the lower support member 56 are fixed to the main body 12A, and support the second rotary compression element 34, the intermediate partition plate 36, and the first rotary compression element 32 so as to sandwich them vertically.
  • the upper support member 54 is arranged so as to close the upper opening of the cylinder 38 of the second rotary compression element 34, and has a hole for rotatably supporting the rotary shaft 16 formed in the central portion thereof.
  • the lower support member 56 is arranged so as to close an opening on the lower side of the cylinder 40 of the first rotary compression element 32, and has a hole for rotatably supporting the rotary shaft 16 formed in the central portion.
  • the lower support member 56 is provided with a suction passage 60 which communicates with a suction port formed in the cylinder 40 of the first rotary compression element 32.
  • the above-described first introduction pipe 94 is inserted into the suction passage 60.
  • the first introduction pipe 94 is connected to an accumulator or the like and introduces the refrigerant into the suction passage 60.
  • the upper support member 54 is provided with a suction passage 58 that communicates with a suction port formed in the cylinder 38 of the second rotary compression element 34.
  • the above-mentioned second introduction pipe 92 is inserted into the suction passage 58.
  • the second introduction pipe 92 is connected to a predetermined portion 144 in the closed container 12, and introduces the refrigerant compressed by the first rotary compression element 32 into the suction passage 58.
  • the upper support member 54 is provided with a discharge passage 62 communicating with a discharge port formed in the cylinder 38 of the second rotary compression element 34.
  • the above-mentioned discharge pipe 96 is inserted into the discharge passage 62.
  • the discharge pipe 96 discharges the refrigerant compressed by the second rotary compression element 34 to the outside of the closed container 12.
  • the refrigerant supplied into the cylinder 40 of the first rotary compression element 32 by the first introduction pipe 94 moves from the low pressure chamber side to the high pressure chamber side by the eccentric rotation of the roller 48 and is compressed. Then, the compressed refrigerant is discharged into the closed container 12 from the discharge port formed in the cylinder 40.
  • the refrigerant discharged into the closed container 12 is supplied into the cylinder 38 of the second rotary compression element 34 via the second introduction pipe 92.
  • the refrigerant supplied into the cylinder 38 is moved from the low compression chamber side to the high compression chamber side and compressed by the eccentric rotation of the roller 46. Then, the compressed refrigerant is discharged from the discharge pipe 96 to the outside of the closed container 12 through the discharge port formed in the cylinder 38.
  • an oil pickup is provided at the lower end of the rotary shaft 16.
  • the oil pickup is press-fitted and attached to the rotating shaft 16, and is configured to suck up oil.
  • the oil pickup sucks up the oil in the oil storage portion T of the bottom portion 12C of the closed container 12 by the centrifugal force generated by the rotation of the rotating shaft 16.
  • the sucked oil is supplied to the sliding portion of the rotary shaft 16 with respect to the rotary compression mechanism 18 and the oil passage 131 in the intermediate partition plate 36 via the oil supply holes 82 and 84 formed in the oil pickup.
  • FIG. 2 is an enlarged view of the oil supply structure portion of the second rotary compression element 34 to the cylinder 38.
  • the intermediate partition plate 36 has an oil supply path 132 in addition to the oil path 131 described above. Further, the cylinder 38 has an oil introduction passage 133 and a communication passage 134.
  • the oil supply passage 132 is a passage that opens the oil passage 131 toward the cylinder 38, extends upward from a predetermined position in the oil passage 131, and penetrates the upper surface of the intermediate partition plate 36.
  • the oil supply passage 132 has, for example, a columnar shape with a diameter of 1 mm, a cross-sectional area of 0.785 mm 2 , and a passage length of 1.9 mm.
  • the oil introduction passage 133 is a passage for introducing the oil supplied from the oil supply passage 132 into the cylinder 38.
  • the oil introduction passage 133 is arranged outside the position corresponding to the oil supply passage 132. That is, the oil introduction path 133 is arranged at a position that does not overlap the oil supply path 132 when viewed in the axial direction (vertical direction) of the rotary compression mechanism 18.
  • the oil introduction passage 133 penetrates the bottom surface of the slot 38B communicating with the compression chamber 38A of the cylinder 38. As shown in FIG. 3, the slot 38B communicates with the compression chamber 38A at a position different from the suction passage 58.
  • the communication passage 134 is formed in the bottom surface of the cylinder 38 so as to have a groove shape, and extends from a position corresponding to the oil supply passage 132 to a position connected to the oil introduction passage 133. There is. That is, the communication passage 134 connects the oil supply passage 132 and the oil introduction passage 133.
  • the communication passage 134 has, for example, a quadrangular prism shape having a cross-sectional area of 0.2 mm 2 with a width of 1 mm and a depth of 0.2 mm and a passage length of 23 mm. That is, the cross-sectional area of the communication passage 134 is smaller than the cross-sectional area of the oil supply passage 132. Further, the passage length of the communication passage 134 is longer than the passage length of the oil supply passage 132.
  • the communication passage 134 is provided between the oil supply passage 132 and the oil introduction passage 133, until it is introduced into the second-stage compression chamber 38A.
  • the oil passage can be lengthened as compared with the configuration without the communication passage 134.
  • the communication passage 134 since the communication passage 134 relays the oil flow, the communication passage 134 serves as an oil passage resistance. As a result, it is possible to prevent the amount of oil supplied into the second-stage compression chamber 38A from becoming excessive. That is, in the present embodiment, it is possible to optimize the amount of oil supplied into the second-stage compression chamber 38A, and consequently reduce the amount of oil discharged.
  • the shape of the through hole is subject to certain restrictions depending on the thickness and material of the tool for processing, the member (intermediate partition plate 36, etc.) to be processed.
  • the cross-sectional area is 0.785 mm 2 and the length is 1.9 mm, and a finer tool or the like is required to form a hole shape smaller than this. .. That is, when oil is supplied to the cylinder 38 only through the oil supply path 132, there is a certain limit to the pressure loss for reducing the oil supply amount.
  • the communication passage 134 since it suffices to form a groove shape on the surface of the cylinder 38, it is thinner than the oil supply passage 132 having a hole shape, such as a cross-sectional area of 0.2 mm 2 and a length of 23 mm.
  • a shape having a long passage can be added.
  • the groove shape it is possible to add a thinner shape and a longer passage by merely scraping the surface of the member (cylinder 38 or the like) to be processed.
  • the present embodiment it is possible to form a narrower and longer shape while there are restrictions in the manufacturing process, so it is possible to easily increase the pressure loss in the oil passage. As a result, the passage resistance of the oil can be easily increased, and the oil discharge amount can be reduced.
  • the communication passage 134 is formed on the bottom surface of the cylinder 38, that is, on the surface of the cylinder 38 on the side where the cylinder 38 and the intermediate partition plate 36 face each other, the communication passage 134 can be easily formed.
  • the length of the communication passage 134 is set to 23 mm in the above-described embodiment, the present disclosure is not limited to this, and may be appropriately changed depending on the positions of the oil supply passage 132 and the oil introduction passage 133. ..
  • the length of the communication path 134 may be shorter than 23 mm.
  • the communication passage 134 is configured to have a linear shape, but the present disclosure is not limited to this.
  • the communication passage 134 may be configured in a zigzag shape. good. By doing so, the passage length of the communication passage 134 can be increased, so that the passage resistance of the oil can be increased.
  • the communication passage 134 is provided in the cylinder 38 of the second rotary compression element 34, but the present disclosure is not limited to this, and the communication passage may be provided in the intermediate partition plate 36. Further, a communication passage may be provided in both the cylinder 38 and the intermediate partition plate 36.
  • the communication passage 134 has the groove shape, but the present disclosure is not limited to this, and the groove may not have the groove shape.
  • a separate member may be provided between the intermediate partition plate 36 and the cylinder 38, and the through hole formed in the separate member may serve as the communication passage.
  • the intermediate partition plate 36 is exemplified as the oil supply unit, but the present disclosure is not limited to this, and a component other than the intermediate partition plate 36 may be used.
  • the compressor of the present disclosure is useful as a compressor capable of optimizing the amount of oil supplied to the second-stage compression chamber and reducing the amount of oil discharged to the outside of the closed container.
  • Compressor 12 Airtight Container 12A Main Body 12B Lid 12C Bottom 12D Mounting Hole 14 Electric Motor 16 Rotating Shaft 18 Rotary Compressing Mechanism 20 Terminal 22 Stator 24 Rotor 32 First Rotating Compressing Element 34 Second Rotating Compressing Element 36 Intermediate Partition Plate 38 Cylinder 38A Compression chamber 38B Slot 40 Cylinder 42 Eccentric part 44 Eccentric part 46 Roller 48 Roller 54 Upper support member 56 Lower support member 58 Suction passage 60 Suction passage 62 Discharge passage 82 Oil supply hole 92 Second introduction pipe 94 First introduction Pipe 96 Discharge pipe 131 Oil passage 132 Oil supply passage 133 Oil introduction passage 134 Communication passage 144 Predetermined portion T Oil storage portion

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

Ce compresseur est un compresseur de type compression à étages multiples pourvu d'un récipient hermétiquement scellé, et d'un mécanisme de compression rotatif qui est logé à l'intérieur du récipient hermétiquement scellé et qui comprime un fluide frigorigène : le mécanisme de compression rotatif comprend une première unité de compression dans laquelle le réfrigérant est introduit, et qui comprime ledit réfrigérant, une seconde unité de compression dans laquelle le réfrigérant comprimé par la première unité de compression est introduit, et qui comprime ledit fluide frigorigène et décharge celui-ci vers l'extérieur du récipient hermétiquement scellé, et une unité d'alimentation en huile qui fournit de l'huile à l'intérieur d'une chambre de compression de la seconde unité de compression; et au moins une des unités d'alimentation en huile et la seconde unité de compression comprend un passage de communication assurant une communication entre le passage d'alimentation en huile de l'unité d'alimentation en huile et un passage d'introduction d'huile de la seconde unité de compression.
PCT/JP2020/002079 2019-02-14 2020-01-22 Compresseur WO2020166285A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-024314 2019-02-14
JP2019024314A JP7233006B2 (ja) 2019-02-14 2019-02-14 圧縮機

Publications (1)

Publication Number Publication Date
WO2020166285A1 true WO2020166285A1 (fr) 2020-08-20

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ID=72044471

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/002079 WO2020166285A1 (fr) 2019-02-14 2020-01-22 Compresseur

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JP (1) JP7233006B2 (fr)
WO (1) WO2020166285A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005139973A (ja) * 2003-11-05 2005-06-02 Sanyo Electric Co Ltd 多段圧縮式ロータリ圧縮機
JP2013130061A (ja) * 2010-04-01 2013-07-04 Sanyo Electric Co Ltd ロータリコンプレッサ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012159008A (ja) * 2011-01-31 2012-08-23 Sanyo Electric Co Ltd 金属部材の加工孔構造、並びにこの加工孔構造を用いて形成された冷凍サイクル装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005139973A (ja) * 2003-11-05 2005-06-02 Sanyo Electric Co Ltd 多段圧縮式ロータリ圧縮機
JP2013130061A (ja) * 2010-04-01 2013-07-04 Sanyo Electric Co Ltd ロータリコンプレッサ

Also Published As

Publication number Publication date
JP7233006B2 (ja) 2023-03-06
JP2020133428A (ja) 2020-08-31

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