JP5520762B2 - Scroll compressor, electric compressor - Google Patents

Description

  The present invention relates to an improvement in oil separation efficiency from a working fluid in an electric compressor for refrigeration and air conditioning.

  Conventionally, in an electric compressor for refrigeration and air conditioning, there is a problem of so-called oil rising in which part of the refrigeration oil in the working fluid is discharged from the discharge pipe. Due to this phenomenon, when the amount of oil rising from the discharge pipe is large, the heat exchange efficiency of the heat exchanger is lowered. Moreover, if the oil rise continues, there is a shortage of lubricating oil in the compressor, and there is a possibility that the lubricity will eventually deteriorate. In view of this, a structure has been devised in which oil is separated before the working fluid discharged from the compression mechanism portion is guided to the discharge pipe, and the working fluid having a small amount of oil is discharged from the discharge pipe. As an example, Patent Document 1 includes a structure in which a working fluid passes through a compression mechanism, a frame outer peripheral passage, a guide, and a stator outer peripheral passage, and the frame outer peripheral passage, the stator outer peripheral passage, and the guide are arranged around the inner diameter of the sealed container. It is arranged at the same position with respect to the direction. And it has the structure which changes the direction of the working fluid which passed the flame | frame outer periphery channel | path to the circumferential direction with the guide.

JP 2005-163637 A

  In the compressor described in Patent Document 1, oil separation is performed by causing a centrifugal separation effect to the working fluid whose direction is changed in the circumferential direction by the guide, and the separated oil is passed through the stator outer peripheral passage, so that the stator Return to the oil sump at the bottom. However, part of the oil flows through the gap between the stator coil ends from the outer periphery of the stator and reaches the rotor. As a result, there is a risk that the oil is scattered again in the working fluid by the centrifugal force of the rotor.

  An object of the present invention is to improve the oil separation efficiency of a compressor.

In order to achieve the above object, the present invention provides:
In a scroll compressor for compressing refrigerant comprising a fixed scroll and a frame in an airtight container, and a turning scroll turned by a rotating shaft driven by a motor between them,
A discharge pipe for discharging the refrigerant to the outside of the machine is provided below the frame and above the stator of the motor,
The frame includes the frame outer peripheral passage through which a working fluid including a refrigerant compressed by the turning of the orbiting scroll and oil that lubricates the turning flows .
The stator of the motor has a stator end face facing the refrigerant flow from the frame outer peripheral passage, and has a stator outer peripheral passage at a position different from the frame outer peripheral passage in the circumferential direction ,
The stator outer peripheral passage is opposite to the first stator outer peripheral passage with respect to the frame outer peripheral passage, and a first stator outer peripheral passage provided at a position shifted in the circumferential direction with respect to the frame outer peripheral passage. By having a second stator outer peripheral passage provided at a position shifted in the circumferential direction,
It said first stator outer periphery passage and the second stator periphery passages, the working fluid flowing through the frame periphery passage Ru is configured such that the colliding with the stator end surface flows separated oil.

In order to achieve the above object, the present invention
A cylindrical sealed container;
A compression mechanism that is arranged in the upper part of the sealed container and that forms a fixed scroll and a turning scroll inside;
A frame that supports the compression mechanism;
An electric motor part which is arranged at a lower part in the sealed container and includes a stator having a coil end and having a stator outer peripheral passage on an outer peripheral part and a rotor for driving the compression mechanism part via a rotary shaft;
In the electric compressor including a frame outer peripheral passage that is provided outside the compression mechanism portion and communicates the upper space in the closed container and the electric motor upper space from which the working fluid is discharged from the compression mechanism portion.
The frame outer peripheral passage and the stator outer peripheral passage are arranged at different positions with respect to the circumferential direction of the sealed container inner diameter,
The stator outer peripheral passage is opposite to the first stator outer peripheral passage with respect to the frame outer peripheral passage, and a first stator outer peripheral passage provided at a position shifted in the circumferential direction with respect to the frame outer peripheral passage. A second stator outer peripheral passage provided at a position shifted in the circumferential direction,
The working fluid that has passed through the frame outer peripheral passage collides with the upper end of the stator core, and the separated oil flows into the first stator outer peripheral passage and the second stator outer peripheral passage. And a discharge pipe provided on the opposite side of the upper end portion of the stator that collides with the lower portion of the motor unit and above the stator of the motor unit, and on the outer periphery of the stator coil end portion, the stator coil A partition plate higher than the height of the end portion is provided, and the lower end of the partition plate is in close contact with the upper end of the stator core .

In order to achieve the above object, the present invention
In a scroll compressor for compressing refrigerant comprising a fixed scroll and a frame in a cylindrical sealed container, and a turning scroll turned by a rotating shaft driven by a motor between them,
A discharge pipe for discharging the refrigerant to the outside of the machine is provided below the frame and above the stator of the motor,
The frame includes the frame outer peripheral passage through which a working fluid including a refrigerant compressed by the turning of the orbiting scroll and oil that lubricates the turning flows.
The stator of the motor has a stator end surface facing the refrigerant flow from the frame outer peripheral passage, and has a stator outer peripheral passage at a position different from the frame outer peripheral passage in the circumferential direction,
The stator outer peripheral passage is opposite to the first stator outer peripheral passage with respect to the frame outer peripheral passage, and a first stator outer peripheral passage provided at a position shifted in the circumferential direction with respect to the frame outer peripheral passage. A second stator outer peripheral passage provided at a position shifted in the circumferential direction,
The frame periphery passage and said first stator outer periphery passage, said second stator periphery passages, as viewed from an upper surface of the cylindrical closed vessel Ru is arranged on one of the semicircular side.

  According to the present invention, the oil separation efficiency of the compressor can be improved.

The longitudinal cross-sectional view of the scroll compressor of 1st embodiment of this invention. FIG. 2 is a cross-sectional view of the scroll compressor of FIG. 1. Explanatory drawing explaining flows, such as refrigerant gas. The longitudinal cross-sectional view at the time of arrange | positioning the member with a clearance gap to the scroll compressor of FIG. The longitudinal cross-sectional view of the scroll compressor of 2nd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
The compressor having the structure of the first embodiment will be described below with reference to FIGS.

  First, the configuration of the compressor will be described with reference to FIGS. 1 and 2. A scroll compressor 1, which is an example of a fluid compressor, has a compression mechanism portion 2 that compresses a refrigerant gas that is a working fluid and discharges it upward, and a drive portion 3 that drives the compression mechanism portion via a rotating shaft. It is configured to be housed in a closed hermetic container 700. In the present embodiment, a vertical scroll compressor in which the compression mechanism unit 2, the drive unit 3, and the oil reservoir 730 are arranged in this order from the top, and the compression mechanism unit 2 and the drive unit 3 are connected via the rotation shaft 300. is there.

  The sealed container 700 has an upper cap 710 and a lower cap 720. The upper cap 710 and the lower cap 720 are fitted over the central cylindrical portion of the sealed container 700 so as to cover the outside, and the fitting end portions are heated and welded obliquely from below and obliquely upward by a welding torch. A leg portion 721 is attached to the bottom surface of the sealed container 700. A magnet 722 is attached to the inside of the lower cap 720 and plays a role of collecting dust in the compressor.

  A hermetic terminal 702 and a terminal cover 703 are provided on the side surface of the hermetic container 700 so that electric power can be supplied to the electric motor 600. The hermetic terminal 702 is provided through the hermetic container 700 and is positioned between the coil end 601 a of the stator 601 and the frame 400. The motor stator 601 has a stator end surface 612 that faces the refrigerant flow from the frame outer peripheral passage 421, and a stator outer peripheral passage (613 or the like) at a position different from the frame outer peripheral passage 421 in the circumferential direction. Have The frame outer peripheral passage 421 is formed between the frame 400 and the sealed container 700. A stator outer peripheral passage (613 or the like) is formed between the stator 601 and the sealed container 700.

  The drive unit 3 that drives the orbiting scroll 200 to rotate is an electric motor 600 including a stator 601 and a rotor 602, a rotating shaft 300, an oil supply pump 900, and an Oldham coupling 500 that is a main component of the rotation preventing mechanism of the orbiting scroll 200. And rolling bearings 401 and 803, an orbiting scroll bearing portion 203, and a sliding bearing 210 disposed on the orbiting scroll bearing portion 203.

  The rotating shaft 300 includes a main shaft portion 302, a crankpin 301, and a sub bearing support portion 303 that are integrally provided. The main shaft portion 302 and the auxiliary bearing support portion 303 are formed on the same shaft center, and constitute a main shaft portion. Further, an oil supply pump 900 is press-fitted into the lower end portion of the rotating shaft 300. The rolling bearings 401 and 803 constitute a rotating shaft support portion that rotatably engages the main shaft portion 302 and the sub bearing support portion 303 of the rotating shaft 300. The orbiting scroll bearing portion 203 is provided in the orbiting scroll 200 so that the sliding bearing 210 is press-fitted into the inner diameter of the orbiting scroll bearing portion 203 so that the crank pin 301 of the rotating shaft 300 can be moved and rotated in the thrust direction that is the rotating shaft direction. It has been.

  The rolling bearing (main bearing) 401 is arranged on the upper side of the electric motor 600, and the rolling bearing (sub bearing) 803 is arranged on the lower side of the electric motor 600. Rolling bearings 401 and 803 constitute main shaft bearings that support main shaft portions on both sides of electric motor 600. A housing 802 is fixed to the lower frame 801 fixed to the hermetic container 700 via bolts 805. A rolling bearing 803 is inserted into the housing 802 from above, and a housing cover 804 is further attached from above.

  The oil supply pump 900 is a centrifugal pump attached to the lower end of the rotary shaft 300, and forcibly sucks the lubricating oil stored in the oil sump 730 through the oil supply hole 901, and passes through the oil passage 311 to rotate the auxiliary bearing 803. It is provided for supplying to the scroll bearing portion 203 and further to the rolling bearing portion 401. The oil supplied from the oil passage 311 is also supplied to the sliding portion between the orbiting scroll 200 and the fixed scroll 100. The oil passage 311 is provided so as to vertically penetrate the rotating shaft 300, and has a lower oiling hole concentric with the axis of the rotating shaft 300 and an upper oiling hole eccentric with respect to the axis of the rotating shaft 300. doing. A lateral oil supply hole 312 communicating with the lower oil supply hole is provided to supply oil to the auxiliary bearing 803.

  The compression mechanism unit 2 includes a fixed scroll 100 and a turning scroll 200 as basic elements.

  The frame 400 is fixed to the hermetic container 700 and constitutes a member that supports the rolling bearing 401. The frame 400 includes a bearing support portion 401a that supports the rolling bearing 401, and a compression mechanism support portion 401b that extends outward from an upper portion of the bearing support portion 401a and supports the compression mechanism portion 2. The entire lower surface of the compression mechanism support 401b is formed flat and positioned above the discharge pipe 701, and the outer peripheral surface thereof is welded 740 to the inner peripheral surface of the sealed container 700 at a plurality of locations in the circumferential direction.

  The balance weight 407 is provided on the rotating shaft 300 so as to be positioned closer to the electric motor than the rolling bearing 401. In this embodiment, the balance weight 407 is formed separately from the rotary shaft 300 and is press-fitted and fixed to the rotary shaft 300. However, the balance weight 407 is provided integrally with the rotary shaft 300. May be. The maximum outer diameter portion 407a of the balance weight 407 is provided so as to protrude from the end face side of the coil end 601a of the stator 601 and has a larger diameter than the inner diameter of the coil end 601a. Thereby, a sufficient rotation balance of the rotation shaft 300 can be ensured.

  The fixed scroll 100 includes a base plate 101, a scroll wrap 102 that is a spiral body, a suction port 103, and a discharge port 104, and is fixed to the frame 400 by a plurality of bolts 405. The plurality of bolts 405 are equally arranged in the circumferential direction. The scroll wrap 102 is erected vertically below the base plate 101.

  The orbiting scroll 200 includes a base plate 201, a scroll wrap 202, an orbiting scroll bearing portion 203, a slide bearing 210 disposed in the orbiting scroll bearing portion 203, and a back pressure hole (not shown) as basic components. The scroll wrap 202 is erected vertically above the base plate 201. The orbiting scroll bearing portion 203 is formed so as to protrude perpendicularly to the lower side (non-lap side) of the base plate 201. The orbiting scroll 200 is formed by processing each component from a casting made of cast iron, aluminum, or the like.

  The base plate 201 of the orbiting scroll 200 is provided with a back pressure hole (not shown) that allows the compression chamber 130 and the back pressure chamber 411 on the orbiting back surface to communicate with each other. Is maintained at an intermediate pressure (intermediate pressure). The back pressure chamber 411 configured on the back side of the orbiting scroll 200 is a space formed by being surrounded by the orbiting scroll 200, the frame 400, and the fixed scroll 100. Therefore, the frame 400 also serves as a member that forms the back pressure chamber 411.

  A seal ring 410 provided in a groove on the upper surface of the frame 400 prevents discharge gas from flowing into the back pressure chamber 411. The orbiting scroll 200 is pressed against the fixed scroll 100 by the resultant force of the intermediate pressure in the back pressure chamber 411 and the discharge pressure acting inside the seal ring 410. Here, the inner diameter of the seal ring 410 is smaller than the outer diameter of the rolling bearing 401.

  In order to be able to adopt such a configuration, the rolling bearing 401 is inserted into the frame 400 from the rotation driving means side of the frame 400, and the inserted rolling bearing 401 is fixed by the frame cover 403. A thrust bearing 402 is provided on the frame cover 403. The frame cover 403 is formed separately from the frame 400. The frame cover 403 is fixed to the frame 400 with bolts 406. By fixing the bolts in this manner, the gap between the frame cover 403 and the frame 400 can be accurately sealed, so that oil leakage from the oil supply path can be suppressed. The frame cover 403 includes a portion that is inserted inside the frame 400 and presses the rolling bearing 401, and a portion that contacts and is fixed to the end surface of the frame 400 on the side of the rotation driving means.

  The Oldham joint 500 is disposed on the back surface of the base plate 201 of the orbiting scroll 200. One set of two orthogonal key portions formed on the Oldham joint 500 slides on a key groove which is a receiving portion of the Oldham joint 500 formed on the frame 400, and the other set is configured on the back side of the orbiting scroll wrap 202. Slide the keyway. As a result, the orbiting scroll 200 orbits within the plane perpendicular to the axial direction, which is the direction in which the scroll wrap 202 stands, without rotating with respect to the fixed scroll 100.

  When the crank pin 301 rotates eccentrically by the rotation of the rotary shaft 300 connected to the electric motor 600, the compression mechanism unit 2 performs the orbiting motion without rotating about the fixed scroll 100 by the Oldham joint 500, and the refrigerant gas is supplied. The air is sucked into the compression chamber 130 formed by the scroll wraps 102 and 202 through the suction pipe 711 and the suction port 103. The compression chamber 130 configured by meshing the fixed scroll 100 and the orbiting scroll 200 is subjected to a compression operation in which the volume thereof is reduced by the orbiting movement of the orbiting scroll 200. Due to the orbiting motion of the orbiting scroll 200, the compression chamber 130 decreases in volume while compressing the refrigerant gas while moving to the center.

  In this compression operation, the refrigerant gas is sucked into the compression chamber 130 through the suction pipe 711 and the suction port 103 as the orbiting scroll 200 rotates, and is sealed from the discharge port 104 of the fixed scroll 100 through the compression stroke. It is discharged into the container 700. Thereby, the space in the sealed container 700 is kept at the discharge pressure. A refrigerant such as R410A that is friendly to the global environment is used as the refrigerant gas to be compressed by the compression mechanism section 2.

  Thereafter, the discharged refrigerant gas circulates around the compression mechanism unit 2 and the electric motor 600 and then is discharged from the discharge pipe 701 to the outside of the scroll compressor 1 of the sealed container 700.

  Next, the oil supply path will be described. When the rotating shaft 300 is rotated, the oil in the oil reservoir 730 is boosted and supplied to the oil passage 311 in the rotating shaft by the oil supply pump 900. Part of the oil sent to the oil passage 311 flows through the lateral hole 312 to the auxiliary bearing 803 that is a rolling bearing, and then returns to the oil reservoir 730. The oil that reaches the upper portion of the crankpin 301 through the oil passage 311 passes through the slide bearing 210 and further flows into the rolling bearing 401. Most of the oil that has lubricated the rolling bearing 401 passes through the oil drain pipe 408 and returns to the oil sump 730.

  An oil supply pocket 205 is provided on the end surface of the orbiting scroll bearing portion 203 of the orbiting scroll 200, and the orbiting scroll 200 reciprocates between the outer side and the inner side of the seal ring 410 as the orbiting scroll 200 revolves. And part of the oil between the bearing 401 is conveyed to the back pressure chamber 411. The conveyed oil is supplied to the Oldham coupling 500 and then supplied to the end face 105 of the fixed scroll and the sliding face of the base plate 201 of the orbiting scroll 200.

  The oil conveyed to the back pressure chamber 411 flows into the compression chamber 130 through a back pressure hole (not shown) or through a minute gap on the end plate sliding surface. The oil that has flowed into the compression chamber 130 is discharged from the discharge port 104 together with the compressed refrigerant gas, is separated from the refrigerant gas in the sealed container 700, and returns to the oil reservoir 730.

  Next, the flow of oil and refrigerant gas discharged from the discharge port 104 of the fixed scroll 100 will be described with reference to FIGS. As shown in FIG. 2, the frame outer peripheral passage 421 and the stator outer peripheral passage (613 and the like) are arranged at different circumferential positions. With such an arrangement, the discharged oil and refrigerant gas pass through the frame outer peripheral passage (a) 421 provided in the frame 400 as shown in FIG. 2 and FIG. 3), the oil is separated. The refrigerant gas with a small amount of oil after oil separation flows in the space between the partition plate 620 and the inner diameter of the hermetic container 700 in the circumferential direction, and separates the oil by the action of centrifugal force while discharging the pipe as indicated by the white arrow. It reaches 701 and is discharged to the outside. The stator partition plate 620 is in the radial direction when viewed from the rotary shaft 300 and is disposed between the motor coil end 601a and the stator outer peripheral passage (eg 613), that is, between the motor coil end 601a and the hermetic container 700. Has been.

  Or it flows to the lower part through a stator outer periphery passage (613 etc.). The discharge pipe 701 is disposed at a substantially diagonal position of the frame outer peripheral passage (a) 421, that is, at a position where the discharge pipe 701 and the frame outer peripheral passage (a) 421 form a substantially diameter, and at the same height as the balance weight 407. And penetrates the sealed container 700.

  On the other hand, the separated oil reaches the path between the partition plate 620 and the sealed container 700 along the inner peripheral side of the sealed container 700. Then, a stator outer peripheral passage (a) 610, a stator outer peripheral passage (b) 611 and a plurality of other stator outer peripheral passages 613 which flow through this passage and are arranged as shown in FIG. It flows downward and returns to the oil sump 730.

  In this way, the oil is effectively separated by disposing the frame outer peripheral passage and the stator outer peripheral passage at different positions with respect to the circumferential direction of the inner diameter of the hermetic container 700, and the partition plate 620 causes the oil to reach the coil end 601a. It reaches the rotor 602 through the gap and is prevented from being scattered by the rotational force. Further, by arranging the discharge pipe 701 and the frame outer peripheral passage (a) 421 diagonally, the effect of oil separation by centrifugal force from the refrigerant gas containing oil can be enhanced.

  In addition, a plurality of frame outer peripheral passages may be provided at rotational positions different from the stator outer peripheral passages as described above.

  With the above structure, the refrigerant gas and the oil can be effectively separated, and the oil contained in the refrigerant can be reduced by preventing the separated oil from scattering.

  More specifically, the working fluid that has passed through the outer periphery of the frame collides with the end of the stator to separate the oil. The working fluid after the oil separation is further separated by the centrifugal separation effect while flowing through a space formed by the partition plate on the outer periphery of the stator and the inner diameter of the hermetic container. And it reaches the discharge pipe located on the opposite side of the end of the stator and is discharged to the outside. On the other hand, the separated oil passes through the stator outer peripheral passage and returns to the oil sump at the bottom of the compressor. Thus, since it is the structure which prevented the isolate | separated oil flowing into a rotor part and scattering in a working fluid, high oil separation efficiency can be obtained.

  Furthermore, you may employ | adopt a structure as shown in FIG. That is, a member with a gap as shown in FIG. 4 is disposed in the middle of the refrigerant flow flowing through the frame outer peripheral passage (a) 421 and the stator outer peripheral passage (613 and the like).

  With such a structure, the flow rate of the refrigerant gas passing through the frame outer peripheral passage (a) 421 can be reduced. As a result, it is possible to reduce the phenomenon that oil blows up when the refrigerant gas collides with the oil reservoir 730, which can contribute to the reduction of oil rising.

[Second Embodiment]
A compressor having the structure of the second embodiment will be described with reference to FIG.

  In the compressor of the second embodiment, in addition to the frame outer peripheral passage and the stator outer peripheral passage described in the first embodiment, the frame outer peripheral passage (b) 422 and the stator outer peripheral passage (b) 611 are arranged in the same circumferential direction. Placed in position. With such an arrangement, it is possible to flow a gas necessary for cooling the coil to the lower part of the stator, and to prevent a reduction in motor efficiency due to an increase in the temperature of the stator coil. Therefore, high oil separation efficiency can be obtained while maintaining performance.

  However, if excessive gas flows below the stator, the oil accumulated in the oil sump 730 may be spouted up. Therefore, the cross-sectional area of the stator outer peripheral passage is made smaller than the area of the frame outer peripheral passage. That is, the stator 601 of the motor has the stator end surface 612 at a position facing a part of the refrigerant flow from the frame outer peripheral passage (b) 422 and is smaller than the cross-sectional area of the frame outer peripheral passage (b) 422. A stator outer peripheral passage (b) 611 having a cross-sectional area is provided.

  Thereby, only a part of the refrigerant flow that has passed through the frame outer peripheral passage (b) 422 flows downward, and the other refrigerant flow can collide with the stator end surface 612 as in the first embodiment. Thereafter, the collided refrigerant flow flows in the circumferential direction, and the following is the same as in the first embodiment.

  Furthermore, you may employ | adopt a structure as shown in FIG. That is, a member with a gap as shown in FIG. 4 is arranged in the middle of the refrigerant flow flowing through the frame outer peripheral passage (b) 422 and the stator outer peripheral passage 611. The member with the gap may be constituted by a steel plate with a hole or a demister. With this configuration, the oil contained in the refrigerant flow that has passed through the frame outer peripheral passage (b) 422 is collided and separated, and only a part of the refrigerant flow can flow downward. As a result, the oil separation efficiency can be improved. That is, the same effect as that of the stator outer peripheral passage 611 can be obtained.

  As described above, as described in each embodiment, it is possible to improve the oil separation efficiency, and it is possible to obtain a highly reliable compressor with an inexpensive structure.

DESCRIPTION OF SYMBOLS 1 Scroll compressor 2 Compression mechanism part 3 Drive part 100 Fixed scroll 101 Base plate 102 Lap 103 Inlet port 104 Discharge port 105 End plate surface 130 Compression chamber 200 Orbiting scroll 201 Base plate 202 Lap 203 Orbiting scroll bearing 205 Oil supply pocket 210 Sliding bearing 300 Rotating shaft 301 Crank pin 302 Main shaft portion 303 Sub bearing support portion 311 Oil passage 312 Horizontal hole 400 Frame 401 Rolling bearing (main bearing)
402 Thrust bearing 403 Frame cover 405, 406, 805 Bolt 407 Balance weight 408 Oil drain pipe 410 Seal ring 411 Back pressure chamber 421 Frame outer peripheral passage (a)
422 Frame outer peripheral passage (b)
500 Oldham coupling 600 Electric motor 601 Stator 601a Coil end 602 Rotor 610 Stator outer peripheral passage (a)
611 Stator outer peripheral passage (b)
612 Stator end surface 613 Plural stator outer peripheral passages 620 other than 610 and 611 Stator partition plate 630 Member 700 with a gap Sealed container 701 Discharge pipe 702 Hermetic terminal 703 Terminal cover 710 Upper cap 711 Suction pipe 720 Lower cap 721 Leg 722 Magnet 730 Oil sump 801 Lower frame 802 Housing 803 Rolling bearing (sub bearing)
804 Housing cover 900 Pump part

Claims (10)

In a scroll compressor for compressing refrigerant comprising a fixed scroll and a frame in an airtight container, and a turning scroll turned by a rotating shaft driven by a motor between them,
A discharge pipe for discharging the refrigerant to the outside of the machine is provided below the frame and above the stator of the motor,
The frame has a frame outer peripheral passage through which a working fluid containing a refrigerant compressed by turning of the orbiting scroll and oil that lubricates the turning flows .
The stator of the motor, which has a stator end surface facing the flow of refrigerant from said frame outer peripheral passage, said frame outer peripheral passage have a stator outer periphery passage in different positions with respect to the circumferential direction,
The stator outer peripheral passage is opposite to the first stator outer peripheral passage with respect to the frame outer peripheral passage, and a first stator outer peripheral passage provided at a position shifted in the circumferential direction with respect to the frame outer peripheral passage. By having a second stator outer peripheral passage provided at a position shifted in the circumferential direction,
It said first stator outer periphery passage and the second stator periphery passages, characterized Rukoto the working fluid flowing through the frame periphery passage is configured to flow the oil that is collided separated into the stator end face Scroll compressor. In claim 1,
A scroll compressor characterized in that a stator partition plate is disposed between the coil end of the motor and the stator outer peripheral passage in a radial direction when viewed from the rotating shaft. In claim 1 or 2,
The stator of the motor, a scroll that comprises said at positions opposed to a part of the refrigerant flow from the frame periphery passageway, a stator outer periphery passage cross-sectional area smaller than the cross-sectional area of the previous SL-frame outer peripheral passage Compressor. In any one of Claims 1 thru | or 3,
The scroll compressor according to claim 1, wherein the frame outer peripheral passage is formed between the frame and the sealed container. In any one of Claims 1 thru | or 4,
The scroll compressor, wherein the stator outer peripheral passage is formed between the stator and the sealed container. In any of claims 1 to 5,
A scroll compressor characterized in that a member with a gap is disposed in the refrigerant flow between the frame outer peripheral passage and the stator outer peripheral passage. A cylindrical sealed container;
A compression mechanism that is arranged in the upper part of the sealed container and that forms a fixed scroll and a turning scroll inside;
A frame that supports the compression mechanism;
An electric motor part which is arranged at a lower part in the sealed container and includes a stator having a coil end and having a stator outer peripheral passage on an outer peripheral part and a rotor for driving the compression mechanism part via a rotary shaft;
In the electric compressor including a frame outer peripheral passage that is provided outside the compression mechanism portion and communicates the upper space in the closed container and the electric motor upper space from which the working fluid is discharged from the compression mechanism portion.
The frame outer peripheral passage and the stator outer peripheral passage are arranged at different positions with respect to the circumferential direction of the sealed container inner diameter,
The stator outer peripheral passage is opposite to the first stator outer peripheral passage with respect to the frame outer peripheral passage, and a first stator outer peripheral passage provided at a position shifted in the circumferential direction with respect to the frame outer peripheral passage. By having a second stator outer peripheral passage provided at a position shifted in the circumferential direction,
The working fluid that has passed through the frame outer peripheral passage collides with the upper end of the stator core, and the separated oil flows into the first stator outer peripheral passage and the second stator outer peripheral passage. And a discharge pipe provided on the opposite side of the upper end portion of the stator that collides with the lower portion of the motor unit and above the stator of the motor unit , and on the outer periphery of the stator coil end portion, the stator coil high partition plate is provided than the height of the end portion, an electric compressor, characterized in that the lower end of the partition plate is in close contact with the stator core upper. The electric compressor according to claim 7,
The frame outer peripheral passage and the stator outer peripheral passage are arranged in the same positional relationship as in claim 7, and the frame outer peripheral passage and the stator outer peripheral passage are arranged at the same position with respect to the circumferential direction of the inner diameter of the sealed container, and An electric compressor characterized in that a stator outer peripheral passage sectional area is smaller than a stator outer peripheral passage sectional area of the positional relationship of claim 7. In claim 7 or 8,
An electric compressor characterized in that a member with a gap is arranged between a frame outer peripheral passage and a stator outer peripheral passage arranged in the same positional relationship with respect to the circumferential direction of the inner diameter of the sealed container. In a scroll compressor for compressing refrigerant comprising a fixed scroll and a frame in a cylindrical sealed container, and a turning scroll turned by a rotating shaft driven by a motor between them,
A discharge pipe for discharging the refrigerant to the outside of the machine is provided below the frame and above the stator of the motor,
The frame includes the frame outer peripheral passage through which a working fluid including a refrigerant compressed by the turning of the orbiting scroll and oil that lubricates the turning flows.
The stator of the motor has a stator end surface facing the refrigerant flow from the frame outer peripheral passage, and has a stator outer peripheral passage at a position different from the frame outer peripheral passage in the circumferential direction,
The stator outer peripheral passage is opposite to the first stator outer peripheral passage with respect to the frame outer peripheral passage, and a first stator outer peripheral passage provided at a position shifted in the circumferential direction with respect to the frame outer peripheral passage. A second stator outer peripheral passage provided at a position shifted in the circumferential direction,
The scroll characterized in that the frame outer peripheral passage, the first stator outer peripheral passage, and the second stator outer peripheral passage are arranged on one semicircular side when viewed from the upper surface of the cylindrical sealed container. Compressor.

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