WO2016084121A1 - 圧縮機 - Google Patents

圧縮機 Download PDF

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Publication number
WO2016084121A1
WO2016084121A1 PCT/JP2014/081007 JP2014081007W WO2016084121A1 WO 2016084121 A1 WO2016084121 A1 WO 2016084121A1 JP 2014081007 W JP2014081007 W JP 2014081007W WO 2016084121 A1 WO2016084121 A1 WO 2016084121A1
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WO
WIPO (PCT)
Prior art keywords
oil
inclined portion
standing
separation plate
drive shaft
Prior art date
Application number
PCT/JP2014/081007
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
下地　美保子
宏樹 長澤
勝俊 辰巳
哲英 横山
啓介 新宮
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2014/081007 priority Critical patent/WO2016084121A1/ja
Priority to JP2016561104A priority patent/JP6297168B2/ja
Priority to CN201480083463.7A priority patent/CN106922163B/zh
Priority to CZ2017-240A priority patent/CZ307894B6/cs
Publication of WO2016084121A1 publication Critical patent/WO2016084121A1/ja

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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
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
    • 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
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
    • 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
    • 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
    • F04C29/026—Lubricant separation
    • 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
    • F04C2240/40—Electric motor
    • 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
    • F04C2240/60—Shafts
    • F04C2240/603—Shafts with internal channels for fluid distribution, e.g. hollow shaft
    • 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

Definitions

  • the present invention relates to a compressor, and more particularly to a compressor including an oil separation plate that separates lubricating oil from a refrigerant mixed with the lubricating oil.
  • a rotary compressor that is one of rotary compressors has been proposed in which a ring-shaped oil separation plate that divides a lower space of an electric motor up and down is provided in a sealed container (see, for example, Patent Document 1). .
  • a rotary compressor has been proposed that includes a ring-shaped oil separation plate that is arranged so as to partition a lower space of an electric motor arranged in an airtight container up and down (see, for example, Patent Document 2). ).
  • a part of the lower end surface of the oil separator plate is fixed on the cylinder, and the fixed portion is bent to form an inclined surface.
  • JP-A-61-879993 (2nd page, lines 9 to 13 and FIG. 2) JP 2013-217281 A (page 5, lines 21 to 27, FIGS. 1 and 3)
  • an electric motor having a rotor and a stator is installed in a sealed container.
  • a rotating flow is formed in the sealed container by the rotation of the rotor. Since the oil separation plate of the rotary compressor described in Patent Document 1 is a flat plate member, there is a problem that it is difficult to efficiently separate the lubricating oil from the swirling refrigerant and the lubricating oil.
  • the rotary compressor described in Patent Document 2 includes an annular oil separation plate in which a part of the lower end surface is fixed on a cylinder. For this reason, this oil separation plate has a form in which a first inclined surface inclined upward from the lower end surface and a second inclined surface inclined downward from the apex of the inclined surface are formed. For this reason, the refrigerant and the lubricating oil swirling in the sealed container collide with one lower surface of the first inclined surface and the second inclined surface, and the lubricating oil is separated. However, with respect to the other of the first inclined surface and the second inclined surface, the refrigerant and the lubricating oil swirling in the sealed container collide with the upper surface. Therefore, in the rotary compressor described in Patent Document 2, only one of the first inclined surface and the second inclined surface can contribute to the separation of the lubricating oil, and it is difficult to efficiently separate the lubricating oil. There is a problem.
  • the present invention has been made in order to solve the above-described problems, and an object of the present invention is to obtain a compressor capable of efficiently separating lubricating oil from a gas containing refrigerant and lubricating oil.
  • a compressor according to the present invention includes a hermetic container having an oil reservoir for storing lubricating oil at the bottom, a stator provided in the hermetic container, and a rotation disposed inside the stator and connected to a drive shaft.
  • An electric motor unit having a child, a compression mechanism unit that is provided in the closed container and connected to the drive shaft, and compresses the refrigerant, and an annular member provided in the sealed container between the electric motor unit and the compression mechanism unit.
  • An oil separation plate having a plurality of inclined portions inclined with respect to the axial direction of the drive shaft, an upper end connected to an upper end of the inclined portion, and a lower end having an inclined portion different from the inclined portion. And a plurality of standing portions connected to the lower end.
  • the rotary compressor according to the present invention has the above-described configuration, it is an object of the present invention to obtain a compressor capable of efficiently separating lubricating oil from a gas containing refrigerant and lubricating oil.
  • FIG. 3 is a developed circumferential sectional view of an oil separation plate according to Embodiment 1 of the present invention. It is principal part sectional drawing of the compressor provided with the conventional oil separation board in the space A under an electric motor. It is a perspective view of the conventional oil separation board shown in FIG.
  • FIG. 7B is a developed sectional view in the circumferential direction of the conventional oil separation plate shown in FIG. 7A.
  • FIG. It is a perspective view of the conventional oil separation board different from FIG. 7A. It is a circumferential direction expanded sectional view of Drawing 8A. It is a perspective view of the conventional oil separation board different from FIG. 7A and FIG. 8A.
  • FIG. 9B is a developed sectional view in the circumferential direction of the oil separation plate shown in FIG. 9A.
  • FIG. 1 is a longitudinal sectional view showing an overall configuration of a compressor 80 according to the first embodiment.
  • FIG. 2 is an enlarged longitudinal sectional view showing the lower part of the sealed container 1 of FIG.
  • FIG. 3 is an enlarged longitudinal sectional view showing the central portion of the sealed container 1 of FIG.
  • FIG. 4 is a perspective view of the oil separation plate 100 according to the first embodiment.
  • the compressor 80 includes a hermetic container 1 having an oil reservoir 1 a that stores the lubricating oil 4 at the bottom. Inside the hermetic container 1, an electric motor unit 2 and a compression mechanism unit 3 driven by the electric motor unit 2 are installed.
  • the sealed container 1 includes, for example, a cylindrical central container 11 and an upper container 12 and a lower container 13 that are fitted in the upper and lower openings of the central container 11 in a sealed state.
  • a suction pipe 6 to which a suction muffler 5 is attached is connected to the central container 11, and a discharge pipe 7 is connected to the upper container 12.
  • the suction pipe 6 is a connection pipe for sending the gas refrigerant (low temperature and low pressure) flowing through the suction muffler 5 into the compression mechanism unit 3.
  • the discharge pipe 7 is a connection pipe for allowing the gas refrigerant (high temperature and high pressure) in the sealed container 1 compressed by the compression mechanism unit 3 to flow into the refrigerant pipe.
  • the electric motor unit 2 includes a stator 21 provided in the hermetic container 1, and a rotatable rotor 22 disposed inside the stator 21 and connected to a drive shaft 23.
  • the stator 21 is fixed to the inner peripheral surface of the central container 11.
  • the outer surface of the rotor 22 is provided to face the inner surface of the stator 21 with a predetermined interval.
  • a drive shaft 23 that extends downward is connected to the rotor 22.
  • the drive shaft 23 is rotatably supported by an upper bearing 34 and a lower bearing 35 which will be described later, and rotates together with the rotor 22.
  • an oil suction hole 23a opened on the bottom side of the sealed container 1 is provided in the shaft center portion of the drive shaft 23, and a spiral centrifugal pump 23b is provided in the oil suction hole 23a.
  • the oil supply pipe 40 has a flat portion 40 a provided at one end thereof fixed between the lower bearing 35 and the lower muffler 37 with a gap with the drive shaft 23. That is, the oil supply pipe 40 is not rotated because it is connected to the oil suction hole 23 a provided in the drive shaft 23 with a gap.
  • the centrifugal pump 23b rotates together with the drive shaft 23
  • the lubricating oil 4 is sucked into the oil supply pipe 40 as indicated by the arrow Z and sucked upward from the oil suction hole 23a.
  • the diameter of the oil supply pipe 40 is adjusted so that optimum oil supply can be performed when the electric motor unit 2 rotates at high speed.
  • the diameter of the oil supply pipe 40 is smaller than the oil suction hole 23 a provided in the drive shaft 23.
  • the amount of the lubricating oil 4 that can be stored at the bottom in 1 can be increased.
  • the compression mechanism unit 3 is, for example, a rotary type, and has a space A below the electric motor unit 2 and is fixed to the central container 11.
  • the compression mechanism part 3 is provided in the airtight container 1, is connected to the drive shaft 23, and has a function which compresses a refrigerant
  • the compression mechanism unit 3 includes a cylindrical cylinder 31, a piston 32, a vane 33, an upper bearing 34, and a lower bearing 35.
  • the upper bearing 34 is provided with an upper muffler 36, and the lower bearing 35 is provided with a lower muffler 37.
  • an oil supply pipe 40 that extends downward through the lower muffler 37 is provided at the lower portion of the compression mechanism portion 3.
  • the cylinder 31 has a central axis that is eccentric with respect to the central axis of the drive shaft 23.
  • the cylinder 31 has a suction port 38 to which the suction pipe 6 described above is connected, and the discharge port 34a and the discharge port 35a provided in the upper bearing 34 and the lower bearing 35, respectively, communicate with the inside of the cylinder 31.
  • the piston 32 is coaxial with the central axis of the drive shaft 23 and is fitted to the drive shaft 23 so as to rotate together with the drive shaft 23.
  • a vane 33 is slidably accommodated in the piston 32.
  • the disk portions of the upper bearing 34 and the lower bearing 35 described above close the upper and lower end surfaces of the cylinder 31.
  • the discharge port 34 a and the discharge port 35 a described above are formed in the disk portions of the upper bearing 34 and the lower bearing 35. That is, the compression mechanism unit 3 is connected to the electric motor unit 2 via the drive shaft 23, and the driving force of the electric motor unit 2 is transmitted to the compression mechanism unit 3 via the drive shaft 23, so that the gas refrigerant is It is configured to compress.
  • the upper muffler 36 is provided on the upper part of the disk part of the upper bearing 34, that is, on the upper part of the compression mechanism part 3 so as to cover the discharge port 34 a.
  • the lower muffler 37 is provided in the lower part of the disk part of the lower bearing 35 so that the discharge outlet 35a may be covered.
  • a muffler discharge hole 36 a is formed in the upper muffler 36.
  • the lubricating oil 4 stored in the bottom portion (oil storage portion 1a) in the hermetic container 1 is sucked into the oil suction hole 23a through the oil supply pipe 40 by the centrifugal pump 23b that rotates together with the drive shaft 23.
  • the lubricating oil 4 sucked into the oil suction hole 23 a flows between the upper bearing 34 and the drive shaft 23 from the upper oil supply port 23 c and flows between the upper bearing 34 and the upper surface of the piston 32.
  • the lubricating oil 4 flows between the lower bearing 35 and the drive shaft 23 from the lower oil supply port 23 d and flows between the lower bearing 35 and the lower surface of the piston 32.
  • the drive shaft 23 and the piston 32 rotate smoothly.
  • the lubricating oil 4 is also supplied to the vane 33 side so that the vane 33 slides smoothly.
  • the space A between the electric motor unit 2 and the compression mechanism unit 3 in the sealed container 1 is used for separating the lubricating oil from the gas mixed with the gas refrigerant and the lubricating oil and returning it to the bottom in the sealed container 1.
  • An oil separation plate 100 is provided.
  • the oil separation plate 100 has a ring shape as shown in FIG. 4 and is installed so as to surround the upper muffler 36.
  • the space A between the electric motor unit 2 and the compression mechanism unit 3 is divided into an upper space A1 of the oil separation plate 100 and a lower space A2 of the oil separation plate 100 by the oil separation plate 100. It is divided into.
  • the oil separation plate 100 is composed of a single plate material as shown in FIG. That is, the oil separation plate 100 is configured by integrally forming the inclined portion 101a, the inclined portion 101b, the standing portion 103a, the standing portion 103b, the flat portion 102a, and the flat portion 102b.
  • the oil separation plate 100 is provided so as to surround the upper muffler 36 through which a large amount of oil droplets flow out, and has a higher oil separation effect.
  • the oil separation plate 100 is provided between the inclined portion 101 a and the inclined portion 101 b that gradually decrease along the rotation direction of the electric motor unit 2, and the inclined portion 101 a and the inclined portion 101 b. Both ends of 101a and the inclined portion 101b have a flat portion 102a and a flat portion 102b that are screwed to the upper surface of the cylinder 31.
  • the oil separation plate 100 includes a standing portion 103a that connects the upper side of the inclined portion 101a and one side of the flat portion 102b, and a standing portion 103b that connects the upper side of the inclined portion 101b and one side of the flat portion 102a. ing.
  • the inclined portion 101a and the inclined portion 101b are arc-shaped members having inclined surfaces that are inclined in a preset direction.
  • the inclined surfaces of the inclined portion 101 a and the inclined portion 101 b are inclined with respect to the axial direction of the drive shaft 23.
  • the inclined surfaces of the inclined portion 101 a and the inclined portion 101 b are inclined so as to follow the rotation direction of the drive shaft 23.
  • the inclined surfaces of the inclined portion 101a and the inclined portion 101b are inclined downward as they travel forward in the circumferential direction of the oil separation plate 100.
  • the inclined portion 101a and the inclined portion 101b have inclined surfaces inclined in the counterclockwise circumferential direction so as to correspond to the gas flow direction.
  • the flat portion 102a has one end connected to the lower end of the inclined portion 101a and the other end connected to the lower end of the standing portion 103b.
  • a flat surface parallel to the upper end surface of the cylinder 31 is formed on the flat portion 102a.
  • One end of the flat portion 102b is connected to the lower end of the inclined portion 101b, and the other end is connected to the lower end of the standing portion 103a.
  • a flat surface parallel to the upper end surface of the cylinder 31 is formed on the flat portion 102b.
  • a screw 50 which is a fixing member, is fastened to the flat portion 102a and the flat portion 102b, and is fixed to the upper end surface of the cylinder 31.
  • the oil separation plate 100 is not fixed to the cylinder 31 at only one location, but two locations on the straight line passing through the center of the oil separation plate 100 (flat portion 102a and flat portion 102b) are fixed to the cylinder 31.
  • a fixing member such as a bolt, a fitting claw, or an adhesive is employed. You can also.
  • the standing portion 103a is formed so that the upper end is connected to the upper end of the inclined portion 101a and extends downward from the connection position with the inclined portion 101a.
  • the standing portion 103a has a vertical surface formed so as to rise perpendicularly to the flat portion 102b.
  • the standing portion 103b is formed so that the upper end is connected to the upper end of the inclined portion 101b, the lower end is connected to the other end of the flat portion 102a, and extends downward from the connection position with the inclined portion 101b.
  • the standing portion 103b has a vertical surface formed so as to rise perpendicularly to the flat portion 102a.
  • the inclined portion 101a corresponds to the first inclined portion
  • the inclined portion 101b corresponds to the second inclined portion
  • the flat portion 102a corresponds to the first flat portion
  • the flat portion 102b corresponds to the second flat portion
  • the standing portion 103a has a configuration corresponding to the first standing portion
  • the standing portion 103b has a configuration corresponding to the second standing portion.
  • the oil separation plate 100 has been described with respect to the aspect in which the inclined portion 101a and the inclined portion 101b have the same length.
  • the length and the length of the inclined portion 101b may be different. The same applies to the length of the flat portion 102a and the length of the flat portion 102b, and the length of the standing portion 103a and the length of the standing portion 103b.
  • the oil separation plate 100 has been described with respect to the aspect in which the inclination angle of the inclined surface of the inclined portion 101a is the same as the inclined angle of the inclined surface of the inclined portion 101b.
  • the present invention is not limited to this. It may be different.
  • the oil separation plate 100 has been described with respect to the aspect in which the two inclined surfaces, that is, the inclined portion 101a and the inclined portion 101b, are formed.
  • the aspect in which the inclined surface was formed may be sufficient. That is, the oil separation plate 100 may be formed with three or more inclined portions. In this case, three or more flat portions and upright portions may be formed on the oil separation plate.
  • the oil separation plate 100 has been described with respect to the aspect including the inclined portion 101a and the inclined portion 101b having a flat inclined surface having a constant inclination angle, but the embodiment is not limited thereto. Absent.
  • the inclined portion 101a and the inclined portion 101b may be inclined in a curved surface shape or may be wavy.
  • the oil separation plate 100 has been described as an example in which the planar view shape is an annular shape, but is not limited thereto.
  • the oil separating plate 100 may have a polygonal shape such as a triangle or a square in plan view.
  • the oil separation plate 100 has been described as having the flat portion 102a and the flat portion 102b.
  • the oil separation plate 100 may not have the flat portion 102a and the flat portion 102b.
  • the standing portion 103a of the oil separation plate 100 has an upper end connected to the upper end of the inclined portion 101a and a lower end connected to the lower end of the inclined portion 101b different from the inclined portion 101a.
  • the upper end may be connected to the upper end of the inclined portion 101b, and the lower end may be connected to the lower end of the inclined portion 101a different from the inclined portion 101b.
  • a gas in which the lubricating oil 4 and the gas refrigerant are mixed passes through a groove communicating with the inside of the cylinder 31 and discharge ports 34a and discharge ports provided in the upper bearing 34 and the lower bearing 35, respectively. It flows into the inner space of the upper muffler 36 and the lower muffler 37 from the outlet 35a.
  • the gas refrigerant that has flowed into the inner space of the lower muffler 37 is guided to the inner space of the upper muffler 36 through a gas hole (not shown) that penetrates the lower bearing 35, the cylinder 31, and the upper bearing 34.
  • the gas refrigerant is discharged from the muffler discharge hole 36a into the space A between the electric motor unit 2 and the compression mechanism unit 3 (in the direction of the arrow X1).
  • a swirling flow is generated by the rotation of the rotor 22 of the electric motor unit 2.
  • the mixed gas in the space A is attracted by the swirling flow and flows in the rotation direction of the rotor 22 (arrow Y direction), and the upper and lower surfaces of the inclined portions 101a and 101b of the oil separation plate 100, the standing portion 103a and the standing portion 103 It circulates around the upper muffler 36 while contacting the installation portion 103b and the like.
  • the mixed gas passes through a gas hole 22a provided in the rotor 22 and an air gap 2a between the stator 21 and the rotor 22 as shown by an arrow X2 in FIG. And is discharged from the discharge pipe 7 to the outside of the sealed container 1.
  • the lubricating oil 4 in the mixed gas collides and adheres to the upper and lower surfaces of the inclined portion 101a and the inclined portion 101b of the oil separation plate 100, flows along the inclined portion 101a and the inclined portion 101b, and is provided in the cylinder 31. It falls from the through hole 31a by its own weight (in the direction of arrow Z) and is collected in the oil reservoir 1a provided at the bottom of the sealed container 1.
  • FIG. 5 is a cross-sectional view of the oil separation plate 100 of the present embodiment developed in the circumferential direction.
  • the broken line indicates the gas flow.
  • the other part of the gas contains lubricating oil, and the lubricating oil collides with the lower surface of the erected portion 103a and the lower surface of the erected portion 103b, decelerates and drops by gravity, and is separated from the mixed gas. Will be. Note that the lubricating oil that has dropped by gravity is collected by the oil reservoir 1a. The gas refrigerant and the lubricating oil 4 that has not fallen due to gravity flow out from the side surface of the oil separation plate 100 (U4).
  • the oil separation plate 100 has a standing portion 103a, a standing portion 103b, an inclined portion 101a, an inclined portion 101b, a flat portion 102a, and a flat portion 102b, and is configured in a ring shape so as not to be interrupted.
  • the oil separator plate 100 has an oil droplet layer containing a large amount of lubricating oil floating in the lower space A2 of the oil separator plate 100 and a gas refrigerant layer containing a large amount of gas refrigerant swirling in the upper space A1 because there is no interruption.
  • the area of the interface can be reduced, and oil droplets are unlikely to flow out into the upper space A1.
  • the oil level of the lubricating oil 4 may reach close to the oil separation plate 100. As in this case, when the oil level of the lubricating oil 4 rises, the distance from the oil level to the rotor 22 decreases accordingly. Then, it becomes easy to be influenced by the gas flow (swirl flow) formed by the rotation of the rotor 22. That is, the oil surface of the lubricating oil 4 is easily disturbed by the gas flow formed by the rotation of the rotor 22. When the oil surface of the lubricating oil 4 is disturbed, oil droplets are generated, and the oil droplets are wound up by the gas flow and flow out of the sealed container 1 through the discharge pipe 7.
  • the oil separation plate 100 has a standing portion 103a and a standing portion 103b. For this reason, the oil separation plate 100 can decelerate the gas efficiently. Therefore, the oil surface of the lubricating oil 4 is not easily disturbed, and the generation of oil droplets is suppressed. For this reason, even if the oil level of the lubricating oil 4 reaches the vicinity of the oil separation plate 100, it is possible to suppress the lubricating oil 4 from flowing out of the sealed container 1 with high efficiency.
  • the oil separation plate 100 has an inclined portion 101a and an inclined portion 101b that are inclined in a preset direction. For this reason, the lubricating oil can be moved downward from the gas in the upper space A ⁇ b> 1 within a range close to the entire circumference of the oil separation plate 100.
  • FIG. 6 is a cross-sectional view of a main part of a compressor 60 provided with a conventional oil separation plate 600 in a space A under the electric motor.
  • FIG. 7A is a perspective view of the conventional oil separation plate 600 shown in FIG.
  • FIG. 7B is a developed sectional view in the circumferential direction of the conventional oil separation plate 600 shown in FIG. 7A.
  • a conventional oil separation plate 600 is formed by bending one side end of a ring-shaped plate to form a flat portion 602 and an inclined portion 601, and the flat portion 602 is fastened by a screw 50.
  • the oil separation plate 600 has an inclined portion 601b that increases along the Y direction and an inclined portion 601a that decreases along the rotational direction. Composed. That is, in the oil separation plate 100 of the compressor 80 according to the first embodiment, the inclined portion 101a and the inclined portion 101b are provided in a range close to the entire circumference so that more lubricating oil 4 is separated from the mixed gas.
  • the conventional oil separation plate 600 has a difference of only a half circumference. *
  • FIG. 8A is a perspective view of a conventional oil separation plate 700 different from FIG. 7A.
  • FIG. 8B is a developed circumferential sectional view of FIG. 8A.
  • the conventional oil separation plate 700 is provided with two fan-shaped inclined plates 702 that gradually lower along the rotation direction of the electric motor unit 2 so as to surround the drive shaft 23 (not shown). It is fixed to the upper surface of a cylinder 31 (not shown).
  • FIG. 9A is a perspective view of a conventional oil separation plate 800 different from FIGS. 7A and 8A.
  • 9B is a developed sectional view in the circumferential direction of the oil separation plate shown in FIG. 9A.
  • the conventional oil separation plate 800 is provided with a plurality of vertical plates 803 radially along the outer edge of the upper surface of the cylinder 31, and one end of the vertical plate 803 is fixed to the upper surface of the cylinder 31.
  • the vertical plate 803 is effective for decelerating the gas flow speed that circulates in a space-saving manner, and is effective for suppressing the ripple of the oil level when the oil level of the lubricating oil 4 is high.
  • the vertical plate 803 is open above the vertical plate 803 like the oil separation plate 700, oil droplets are easily wound up in the gas flow.
  • the conventional oil separation plate 600, oil separation plate 700, and oil separation plate 800 are all inclined plates, and only one end of the vertical plate 803 is fixed in the sealed container 1, and both ends are not fixed. For this reason, the inclined portion 101a and the inclined portion 101b are damaged by the vibration during operation of the compressor, or noise is generated.
  • the oil separation plate 100 of the compressor 80 according to the first embodiment has both ends fixed, specifically, the flat portion 102a and the flat portion 102b are fixed with the screws 50, so that damage is suppressed. In addition, noise can be suppressed.
  • the compressor 80 according to the first embodiment has a plurality of inclined portions (inclined portions 101a and 101b) in which the oil separation plate 100 is inclined in a preset direction. For this reason, since the lubricating oil can be moved downward from the gas in the upper space A1 within a range close to the entire circumference of the oil separating plate 100, the lubricating oil is efficiently separated from the mixed gas containing the refrigerant and the lubricating oil. can do. That is, the compressor 80 according to the first embodiment can efficiently separate the lubricating oil, and the recoverability of the lubricating oil is improved.
  • the compressor 80 according to the first embodiment is connected to the upper end side of each inclined portion (inclined portion 101a and inclined portion 101b) and extends downward from the upper end of each inclined portion (inclined portion 101a and inclined portion 101b).
  • the plurality of standing portions (the standing portion 103a and the standing portion 103b) formed as described above. For this reason, when the mixed gas containing the lubricating oil and the refrigerant collides with the upright portion 103a and the upright portion 103b, the mixed gas is decelerated and then flows under the inclined portion 101a and the inclined portion 101b from the side surface of the oil separation plate 100.
  • the compressor 80 can efficiently separate the lubricating oil from the mixed gas containing the refrigerant and the lubricating oil.
  • the oil separation plate 100 of the compressor 80 includes the standing portion 103a, the standing portion 103b, the inclined portion 101a, the inclined portion 101b, the flat portion 102a, and the flat portion 102b, and is not interrupted. Thus, it is configured in a ring shape. Therefore, the oil separation plate 100 has an oil droplet layer containing a lot of oil droplets floating in the lower space A2 of the oil separation plate 100 and a gas refrigerant layer containing a lot of gas refrigerant swirling in the upper space A1 because there is no interruption. The area of the interface can be reduced.
  • the oil separating plate 100 functions as a fluid resistance even if the lubricating oil 4 is foamed at the time of starting the compressor 80, for example, and prevents the lubricating oil from being taken out of the sealed container 1. Can do. Thereby, the oil separation plate 100 of the compressor 80 according to the first embodiment can suppress the depletion of the lubricating oil 4 stored at the bottom in the sealed container 1.
  • the oil separation plate 100 of the compressor 80 according to the first embodiment is fixed at both ends, specifically, the flat portion 102a and the flat portion 102b are fixed with screws 50. For this reason, even if vibration etc. generate
  • Embodiment 2 The shape of the standing portion of the oil separation plate is not limited to the shape of the first embodiment as long as it forms a ring shape continuously with the inclined portion.
  • the same reference numerals are given to the same parts as those in the first embodiment, and only the parts different from the first embodiment will be described.
  • FIG. 10A is a perspective view showing an oil separation plate 200 according to the second embodiment
  • FIG. 10B is a developed sectional view in the circumferential direction of the oil separation plate shown in FIG. 10A.
  • the oil separation plate 200 according to Embodiment 2 is provided with through holes 204a and 204b in the standing portion 103a and the standing portion 103b.
  • the gas flow (V2) colliding with the lower portions of the standing portion 103a and the standing portion 103b is decelerated and inclined from the side surface 101a as in the first embodiment.
  • the gas flow (V1) colliding with the upper portion is made to flow under the inclined portion 101a and the inclined portion 101b from the through hole 204a and the through hole 204b.
  • the lower part of the standing part 103a and the standing part 103b prevents the oil surface from undulating and decelerates the gas flow, and the upper part of the standing part 103a and the standing part 103b generates an upward flow due to a collision. Since it can be suppressed, there is an overall effect that oil droplets are less scattered and oil outflow from the compressor 80 can be reduced.
  • the through hole 204a and the through hole 204b are formed has been described.
  • the present invention is not limited to this, and is formed by cutting part of the standing portion 103a and the standing portion 103b. Notched cuts may be used.
  • the compressor 80 according to the second embodiment can also obtain the same effects as the compressor 80 according to the first embodiment.
  • Embodiment 3 the shape of the standing portion of the oil separation plate is not limited to the shape of the first embodiment as long as it forms a ring shape continuously with the inclined portion.
  • the same reference numerals are given to the same parts as those in the first embodiment, and only the parts different from the first embodiment will be described.
  • FIG. 11A is a perspective view showing an oil separation plate 300 according to Embodiment 3
  • FIG. 11B is a developed sectional view in the circumferential direction of the oil separation plate shown in FIG. 11A.
  • the standing portion 303a and the standing portion 303b are inclined in the same direction as the inclined portion 101a and the inclined portion 101b.
  • the standing portion 303a is inclined so that the angle formed between the upper end of the inclined portion 101a is an acute angle
  • the standing portion 303b is formed between the upper end of the inclined portion 101b. It is inclined so that the angle is a sharp angle.
  • an oil return hole 305a and an oil return hole 305b are formed in the flat part 102a and the flat part 102b. Further, the cylinder 31 is formed with a through hole 31a that communicates the oil separation plate 300 side and the oil reservoir 1a side. For this reason, the lubricating oil that has passed through the oil return hole 305a and the oil return hole 305b is promptly collected in the oil reservoir 1a through the through hole 31a.
  • the gas refrigerant that has collided with the upper portions of the standing portion 103a and the standing portion 103b is caused to flow downward (V2) and flows into the inclined portion 101a and the inclined portion 101b from the side surface of the oil separation plate 300. Can be made.
  • the effects (rising prevention, reduction of gas flow rate) by the standing portions 303a and 303b were generated in the standing portions 303a and 303b while maintaining the same or better than the first embodiment.
  • the oil droplets can be prevented from scattering due to the upward flow, and the lubricating oil 4 can be separated from the mixed gas including the gas refrigerant and the lubricating oil 4 more efficiently than the first and second embodiments. Therefore, when the oil level of the lubricating oil 4 does not reach the oil return hole 305a and the oil return hole 305b, the gas refrigerant (W2) flows downward into the oil return hole 305a and the oil return hole 305b, and the oil droplets are directly applied. The oil return portion 305a and the oil return hole 305b can be dropped into the oil reservoir 1a, and the recoverability of the lubricating oil 4 is improved.
  • the compressor 80 according to the third embodiment can also obtain the same effects as the compressor 80 according to the first embodiment.
  • Embodiment 4 the oil separation plate is not limited to a configuration in which a single plate as in the first to third embodiments is bent and processed.
  • the oil separation plate 400 can be configured by assembling a plurality of parts as follows.
  • the same reference numerals are given to the same parts as those in the third embodiment, and only the parts different from the third embodiment will be described.
  • FIG. 12 is a perspective view showing an oil separation plate 400 according to the fourth embodiment.
  • the oil separation plate 400 is configured by combining parts having any of a plurality of inclined portions, a plurality of standing portions, and a plurality of flat portions, and has a divided configuration.
  • one component has the inclined portion 101a, the flat portion 102a, and the standing portion 303a
  • the other component has the inclined portion 101b, the flat portion 102b, and the standing portion 303b.
  • a through hole 51 is formed in the oil separation plate 400 so that the screw 50 can be passed therethrough.
  • the processing of inclining the standing portions 303a and 303b as in the third embodiment is facilitated, and the processing cost can be reduced. is there.
  • the compressor 80 according to the fourth embodiment can also obtain the same effects as the compressor 80 according to the first embodiment.
PCT/JP2014/081007 2014-11-25 2014-11-25 圧縮機 WO2016084121A1 (ja)

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PCT/JP2014/081007 WO2016084121A1 (ja) 2014-11-25 2014-11-25 圧縮機
JP2016561104A JP6297168B2 (ja) 2014-11-25 2014-11-25 圧縮機
CN201480083463.7A CN106922163B (zh) 2014-11-25 2014-11-25 压缩机
CZ2017-240A CZ307894B6 (cs) 2014-11-25 2014-11-25 Kompresor

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WO2023148867A1 (ja) * 2022-02-03 2023-08-10 三菱電機株式会社 圧縮機及び冷凍サイクル装置

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CN106922163B (zh) 2019-03-26
CZ307894B6 (cs) 2019-07-31
CZ2017240A3 (cs) 2017-06-21
JP6297168B2 (ja) 2018-03-20
JPWO2016084121A1 (ja) 2017-06-01

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