WO2021144875A1 - スクロール圧縮機 - Google Patents

スクロール圧縮機 Download PDF

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Publication number
WO2021144875A1
WO2021144875A1 PCT/JP2020/001009 JP2020001009W WO2021144875A1 WO 2021144875 A1 WO2021144875 A1 WO 2021144875A1 JP 2020001009 W JP2020001009 W JP 2020001009W WO 2021144875 A1 WO2021144875 A1 WO 2021144875A1
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WO
WIPO (PCT)
Prior art keywords
spiral body
wall
thick
fixed
along
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/001009
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English (en)
French (fr)
Japanese (ja)
Inventor
小林　一喜
雷人 河村
渉 岩竹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2021571105A priority Critical patent/JP7241925B2/ja
Priority to PCT/JP2020/001009 priority patent/WO2021144875A1/ja
Publication of WO2021144875A1 publication Critical patent/WO2021144875A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • 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
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Definitions

  • This disclosure relates to a scroll compressor used in an air conditioner, a refrigerator, or the like.
  • a scroll compressor used in an air conditioner, a refrigerator, or the like is provided with a compression mechanism unit for compressing a refrigerant in a compression chamber formed by combining a fixed scroll and a swing scroll, and a container for accommodating the compression mechanism unit.
  • the fixed scroll and the swing scroll each have a structure in which spiral bodies are formed on a base plate, and the spiral bodies are meshed with each other to form a compression chamber. Then, by swinging the swing scroll, the compression chamber moves while reducing the volume, and the refrigerant is sucked and compressed in the compression chamber.
  • the technology aims to increase the compression function by increasing the suction volume of the compression chamber as much as possible while keeping the diameter of the container the same. Development is important.
  • the scroll compressor is equipped with a chip seal at the tip of each of the fixed scroll and the swing scroll to seal the gap between the tip of the spiral and the base plate of the scroll facing the scroll.
  • a chip seal at the tip of each of the fixed scroll and the swing scroll to seal the gap between the tip of the spiral and the base plate of the scroll facing the scroll.
  • Patent Document 1 by making the wall portion of the groove holding the chip seal only on the outside, the wall thickness of the spiral body is made thinner and the suction volume is reduced as compared with the case where the wall portion of the groove is provided on both the inside and the outside. I am trying to expand.
  • Patent Document 1 since the wall portion of the groove is set only on the outside, one side of the two surfaces facing in the direction orthogonal to the spiral direction in the chip seal is not held by the wall portion. Therefore, although Patent Document 1 is effective in expanding the suction volume, the tip seal may fall off due to the sliding of the tip of the spiral body and the pressure fluctuation in the compression chamber, and the holding property of the tip seal is maintained. There was a problem with.
  • the present disclosure has been made in view of these points, and an object of the present disclosure is to obtain a scroll compressor capable of ensuring the retention of the tip seal while expanding the suction volume.
  • the scroll compressor according to the present disclosure includes a fixed scroll in which a fixed spiral body is formed on a fixed base plate, and a swing scroll which is attached to a rotating shaft and has a swing spiral body formed on a rocking base plate.
  • a scroll compressor in which a tip seal is arranged in a spiral groove formed at the tip of each of the fixed spiral body and the swinging spiral body each of the fixed spiral body and the swinging spiral body has a rotation axis. It has a flat shape when viewed in the axial direction, and the part located in the flat direction, which is the direction of being stretched flat, is thicker than the thick part, and the part located in the direction orthogonal to the flat direction is more than the thick part.
  • the thin-walled thin part, and between the thick-walled part and the thin-walled part is a wall-thickness changing part in which the wall-thickness gradually changes.
  • the thick portion has walls on both the outside and the inside of the groove.
  • the suction volume can be secured by forming the fixed spiral body and the swinging spiral body into a flat shape.
  • the wall portion is provided on only one of the outer side and the inner side of the groove in the thin wall portion, so that the wall thickness of each of the fixed spiral body and the rocking spiral body is thick. Suppress the expansion of.
  • the tip seal can be held from both sides and the holdability of the tip seal can be ensured. ..
  • FIG. 1 It is a schematic vertical sectional view of the whole structure of the scroll compressor which concerns on Embodiment 1.
  • FIG. It is sectional drawing of the compression mechanism part of the scroll compressor which concerns on Embodiment 1.
  • FIG. It is a compression process diagram which shows the operation during one rotation of the swing scroll in the scroll compressor which concerns on Embodiment 1.
  • FIG. It is a top view which showed the spiral body of the compression mechanism part of the scroll compressor which concerns on Embodiment 1.
  • FIG. It is an enlarged perspective view of the wall thickness change part in the scroll compressor which concerns on Embodiment 1.
  • FIG. 1 is a schematic vertical sectional view of the overall configuration of the scroll compressor according to the first embodiment.
  • the scroll compressor of the first embodiment includes a compression mechanism unit 8, an electric mechanism unit 110 that drives the compression mechanism unit 8 via a rotating shaft 6, and other components, which form an outer shell. It has a structure housed inside the closed container 100.
  • the frame 7 and the subframe 9 are housed in the closed container 100 so as to face each other with the electric mechanism portion 110 interposed therebetween.
  • the frame 7 is arranged above the electric mechanism portion 110 and is located between the electric mechanism portion 110 and the compression mechanism portion 8, and the subframe 9 is located below the electric mechanism portion 110.
  • the frame 7 is fixed to the inner peripheral surface of the closed container 100 by shrink fitting, welding, or the like.
  • the subframe 9 is fixed to the inner peripheral surface of the closed container 100 by shrink fitting or welding via the subframe holder 9a.
  • a pump element 112 including a positive displacement pump is attached below the subframe 9.
  • the pump element 112 supplies the refrigerating machine oil stored in the oil reservoir 100a at the bottom of the closed container 100 to a sliding portion such as the main bearing 7a described later of the compression mechanism 8.
  • the pump element 112 supports the rotating shaft 6 in the axial direction on the upper end surface.
  • the closed container 100 is provided with a suction pipe 101 for sucking the refrigerant and a discharge pipe 102 for discharging the refrigerant.
  • the compression mechanism unit 8 has a function of compressing the refrigerant sucked from the suction pipe 101 and discharging the compressed refrigerant to the high-pressure part formed above the closed container 100.
  • the compression mechanism unit 8 includes a fixed scroll 1 and a swing scroll 2.
  • the fixed scroll 1 is fixed to the closed container 100 via the frame 7, and the swing scroll 2 is arranged below the fixed scroll 1 and is swingably supported by the eccentric shaft portion 6a described later of the rotation shaft 6. ing.
  • the fixed scroll 1 includes a fixed base plate 1a and a fixed spiral body 1b which is a spiral protrusion formed on one surface of the fixed base plate 1a.
  • the oscillating scroll 2 includes a oscillating base plate 2a and a oscillating spiral body 2b which is a spiral projection formed on one surface of the oscillating base plate 2a.
  • the fixed scroll 1 and the swing scroll 2 are arranged in the closed container 100 in a state where the fixed spiral body 1b and the swing spiral body 2b are meshed with each other. Then, the fixed spiral body 1b and the rocking spiral body 2b mesh with each other to form a compression chamber 71 whose volume decreases from the outer side to the inner side in the radial direction as the rotation shaft 6 rotates.
  • a groove along the spiral shape is formed at the tip of each of the fixed spiral body 1b and the rocking spiral body 2b, and the tip seal 15 is arranged in this groove.
  • the tip seal 15 is a member that prevents the refrigerant from leaking from the gap between the respective tip portions of the fixed spiral body 1b and the rocking spiral body 2b and the base plate of the scroll on the opposite side.
  • the chip seal 15 is made of a hard plastic such as LCP (liquid crystal polymer) or PPS (polyphenylene sulfide).
  • the tip seal 15 has the same width as seen in the axial direction of the rotating shaft 6 from the winding start side to the winding end side of the spiral shape.
  • the baffle 4 is fixed to the surface of the fixed base plate 1a of the fixed scroll 1 opposite to the swing scroll 2.
  • the baffle 4 is formed with a through hole 4a communicating with the discharge port 1c of the fixed scroll 1, and the through hole 4a is provided with a discharge valve 11.
  • a discharge muffler 12 is attached to the baffle 4 so as to cover the discharge port 1c.
  • the frame 7 has a fixed scroll 1 fixedly arranged and has a thrust surface that supports the thrust force acting on the swing scroll 2 in the axial direction. Further, the frame 7 is formed through an opening 7c that guides the refrigerant sucked from the suction pipe 101 into the compression mechanism portion 8.
  • an old dam ring 14 is arranged to prevent the swing scroll 2 from rotating during the turning motion.
  • the key portion 14a of the old dam ring 14 is arranged on the outer peripheral side of the rocking base plate 2a of the rocking scroll 2.
  • the electric mechanism unit 110 supplies a rotational driving force to the rotating shaft 6, and includes an electric motor stator 110a and an electric motor rotor 110b.
  • the motor stator 110a is connected to a glass terminal (not shown) existing between the frame 7 and the motor stator 110a by a lead wire (not shown) in order to obtain electric power from the outside. Further, the motor stator 110a is fixed to the rotating shaft 6 by shrink fitting or the like. Further, in order to balance the entire rotating system of the scroll compressor, the first balance weight 60 is fixed to the rotating shaft 6, and the second balance weight 61 is fixed to the motor stator 110a.
  • the rotating shaft 6 has an eccentric shaft portion 6a above the rotating shaft 6, a spindle portion 6b, and a sub-shaft portion 6c below the rotating shaft 6.
  • a swing scroll 2 is attached to the eccentric shaft portion 6a via a slider 5 with a balance weight and a swing bearing 2c, and the swing scroll 2 swings due to the rotation of the rotation shaft 6.
  • the main shaft portion 6b is fitted to the main bearing 7a arranged on the inner circumference of the cylindrical boss portion 7b provided on the frame 7 via the sleeve 13, and slides with the main bearing 7a via an oil film of refrigerating machine oil. do.
  • the main bearing 7a is fixed in the boss portion 7b by press-fitting a bearing material used for a slide bearing such as a copper-lead alloy.
  • An auxiliary bearing 10 made of ball bearings is provided on the upper part of the subframe 9, and the rotating shaft 6 is pivotally supported in the radial direction on the lower part of the electric mechanism portion 110.
  • the auxiliary bearing 10 may be composed of a bearing other than the ball bearing.
  • the sub-shaft portion 6c is fitted with the sub-bearing 10 and slides with the sub-bearing 10 via an oil film made of refrigerating machine oil.
  • the axial centers of the main shaft portion 6b and the sub-shaft portion 6c coincide with the axial centers of the rotating shaft 6.
  • the space inside the closed container 100 is defined as follows. Of the internal space of the closed container 100, the space on the motor rotor 110b side of the frame 7 is designated as the first space 72. Further, the space formed by the inner wall of the frame 7 and the fixed base plate 1a is referred to as the second space 73. Further, the space on the discharge pipe 102 side of the fixed base plate 1a is designated as the third space 74.
  • FIG. 2 is a cross-sectional view of the compression mechanism portion of the scroll compressor according to the first embodiment.
  • the closed container 100 has a perfect circular shape when viewed in a plane, and is fixed to the inside of the closed container 100 in a state where the outer peripheral surface of the frame 7 is in contact with the inner peripheral surface of the closed container 100. Therefore, the outer peripheral surface of the frame 7 also has a perfect circular shape.
  • the fixed spiral body 1b of the fixed scroll 1 and the swing scroll 2 are arranged in the second space 73.
  • the key portion 14a of the old dam ring 14 is arranged in the second space 73.
  • the outer shape of the swing base plate 2a is flat when viewed in the axial direction of the rotation shaft 6. It has become.
  • the flat shape also includes an oval shape and an elliptical shape, and in short, refers to all shapes that are flatter than a circle.
  • the outer shape of the rocking base plate 2a is a flat shape. Therefore, the rocking spiral body 2b formed on the rocking base plate 2a is also formed into a flat shape that is flattened to match the flat shape of the rocking base plate 2a, so that the rocking base plate 2a has a flat shape. Space can be used effectively and space efficiency can be improved. The same applies to the fixed base plate 1a and the fixed spiral body 1b, which have a flat shape. By increasing the space efficiency in this way, it is possible to increase the volume of the compression chamber 71, specifically, the suction volume while keeping the size of the closed container 100 the same, and improve the compression function force. It becomes possible.
  • the closed container 100 can be miniaturized.
  • the fixed spiral body 1b and the rocking spiral body 2b are not distinguished and both are referred to, they are collectively referred to as "spiral body”.
  • base plate when the fixed base plate 1a and the swing base plate 2a are not distinguished and both are referred to, they are collectively referred to as "base plate”.
  • FIG. 3 is a compression process diagram showing the operation of the swing scroll during one rotation in the scroll compressor according to the first embodiment.
  • FIG. 3A shows the position of the spiral body when the rotation phase is 0 [rad] (2 ⁇ [rad]).
  • FIG. 3B shows the position of the spiral body when the rotation phase is ⁇ / 2 [rad].
  • FIG. 3C shows the position of the spiral body when the rotation phase is ⁇ [rad].
  • FIG. 3D shows the position of the spiral body when the rotation phase is 3 ⁇ / 2 [rad].
  • the motor stator 110a of the electric mechanism unit 110 When the motor stator 110a of the electric mechanism unit 110 is energized, the motor rotor 110b receives rotational force and rotates. Along with this, the rotating shaft 6 fixed to the motor rotor 110b rotates. The rotational movement of the rotating shaft 6 is transmitted to the swing scroll 2 via the eccentric shaft portion 6a.
  • the oscillating spiral body 2b of the oscillating scroll 2 oscillates with an oscillating radius while its rotation is regulated by the old dam ring 14.
  • the swing radius means the amount of eccentricity of the eccentric shaft portion 6a with respect to the spindle portion 6b.
  • the refrigerant flows from the external refrigeration cycle into the first space 72 in the closed container 100 via the suction pipe 101.
  • the low-pressure refrigerant that has flowed into the first space 72 flows into the second space 73 through the two openings 7c installed in the frame 7.
  • the low-pressure refrigerant that has flowed into the second space 73 is sucked into the compression chamber 71 along with the relative swinging motion of the swinging spiral body 2b and the fixed spiral body 1b of the compression mechanism unit 8.
  • the refrigerant sucked into the compression chamber 71 is boosted from low pressure to high pressure by the geometric volume change of the compression chamber 71 accompanying the relative operation of the swinging spiral body 2b and the fixed spiral body 1b.
  • the high-pressure refrigerant passes through the discharge port 1c of the fixed scroll 1 and the through hole 4a of the baffle 4, pushes the discharge valve 11 open, and is discharged into the discharge muffler 12.
  • the refrigerant discharged into the discharge muffler 12 is discharged into the third space 74, and is discharged from the discharge pipe 102 to the outside of the compressor as a high-pressure refrigerant.
  • the spiral shapes of the swinging spiral body 2b and the fixed spiral body 1b are flat. In this way, even when the swinging spiral body 2b is operated with a constant swing radius as shown in FIG. 3 in the compression mechanism unit 8 in which the spiral shape of the spiral body is flattened, the swinging spiral body 2b And the fixed spiral body 1b operate while the facing surfaces facing each other are in contact with each other. That is, in the compression mechanism unit 8, the outward surface 2ba of the swinging spiral body 2b and the inward surface 1bb of the fixed spiral body 1b are in contact with each other, and the inward surface 2bb of the swinging spiral body 2b and the outward surface 1ba of the fixed spiral body 1b are in contact with each other. Works while in contact with.
  • the side wall of the groove that holds the tip seal is only on the outside, so that the suction volume can be expanded.
  • one side of the two surfaces of the chip seal facing in the direction orthogonal to the spiral direction is not held by the side wall, so that the holdability of the chip seal is lowered. Therefore, in the first embodiment, the suction volume is expanded by forming the spiral body into a flatly stretched shape as described above. Further, for the stretched portion of the spiral body, the chip seal is supported on both sides by increasing the wall thickness of the spiral body, and the holding property of the chip seal is ensured.
  • the specific structure of the spiral body for ensuring the holding property of the tip seal 15 will be described with reference to FIG.
  • the shapes of the fixed spiral body 1b and the swinging spiral body 2b are the same as the other by flipping one of the fixed spiral body 1b and the swinging spiral body 2b upside down in the axial direction of the rotating shaft 6. .. Therefore, in the following, the fixed spiral body 1b and the swinging spiral body 2b will not be distinguished, and will be described as the spiral body 20.
  • FIG. 4 is a plan view showing a spiral body of the compression mechanism portion of the scroll compressor according to the first embodiment.
  • FIG. 4 also shows a partially enlarged cross-sectional view.
  • the left side of the drawing is the outward surface side of the spiral body
  • the right side is the inward surface side of the spiral body.
  • the wall thickness of the spiral body 20 is ⁇ / 2 [rad] and 3 ⁇ / 2 [rad], as compared with the wall thickness when the extension angles are 0 [rad] and ⁇ [rad].
  • the wall thickness of the spiral body 20 is the radial width when the tip end portion of the spiral body 20 is viewed in the axial direction of the rotating shaft 6.
  • the spiral body of the first embodiment has a thick portion (hereinafter referred to as a thick portion 21) and a thick portion 21 between the winding start and the winding end, which are the central portions of the spiral shape. It also has a spiral shape in which thin-walled portions (hereinafter referred to as thin-walled portions 22) appear alternately.
  • the portion located in the flat direction horizontal direction in FIG. 4
  • the direction orthogonal to the flat direction (upper and lower in FIG. 4).
  • the portion located in the direction) is the thin-walled portion 22.
  • the wall thickness changing portion 23 is connected to a wall thickness reduction portion 23a in which the wall thickness gradually decreases from the thick wall portion 21 and is connected to the thin wall portion 22, and a wall thickness reduction portion 23a in which the wall thickness is gradually increased from the thin wall portion 22 and is connected to the thick wall portion 21. It has a wall thickness increasing portion 23b.
  • a groove 30 for arranging the tip seal 15 is formed at the tip of the spiral body 20 as described above.
  • the groove 30 is formed so as to follow the spiral shape of the spiral body 20, and the tip seal 15 is arranged in the groove 30.
  • the tip seal 15 is arranged at a position offset by a set distance from the outward surface 20a of the spiral body 20.
  • the tip seal 15 is arranged along the outward surface 20a of the spiral body 20. Therefore, in the spiral body 20, the wall thickness of the wall portion outside the groove 30 is the same over the entire spiral.
  • the thick portion 21 has walls on both the outside and the inside of the groove 30.
  • the wall portion 21a is provided on the outside of the groove 30, and the wall portion 21b is provided on the inside of the groove 30.
  • the chip seal 15 is arranged in the groove 30 between the wall portion 21a and the wall portion 21b.
  • both the surfaces 15a and 15b of the chip seal 15 facing in the direction orthogonal to the spiral direction are supported by the wall portion 21a and the wall portion 21b and arranged in the groove 30.
  • the thin-walled portion 22 has a wall portion 22a only on the outside of the groove 30. Therefore, of the surface 15a and the surface 15b of the chip seal 15, only the outer surface 15a of the chip seal 15 is supported by the wall portion 22a and is arranged in the groove 30.
  • the wall thickness changing portion 23 has wall portions on both the outside and the inside of the groove 30. Specifically, the wall portion 23aa is provided on the outside of the groove 30, and the wall portion 23ab is provided on the inside of the groove 30. Then, the chip seal 15 is arranged in the groove 30 between the wall portion 23aa and the wall portion 23ab. Specifically, in the chip seal 15, both the surface 15a and the surface 15b of the chip seal 15 are supported by the wall portion 23aa and the wall portion 23ab and arranged in the groove 30. In the wall thickness changing portion 23, the height of the outer wall portion 23aa in the axial direction is constant, but the height of the inner wall portion 23ab in the axial direction is the same as the wall thickness, as shown in FIG. Similarly, it changes gradually.
  • FIG. 5 is an enlarged perspective view of a wall thickness changing portion in the scroll compressor according to the first embodiment.
  • FIG. 5 shows the wall thickness reduction portion 23a.
  • the height of the inner wall portion 23ab of the wall thickness reducing portion 23a gradually decreases from the thick portion 21 as the wall thickness decreases, and becomes zero.
  • the height of the outer wall portion 23aa of the wall thickness reducing portion 23a is constant as described above.
  • the inner wall portion 23ab of the wall thickness increasing portion 23b gradually increases in height in the axial direction as the wall thickness becomes thicker, and becomes the same height as the thick wall portion 21.
  • the thin film portion becomes like a thin film having a height, and the thin film portion is easily damaged.
  • the strength can be ensured by changing the height in the axial direction of the wall portion 23ab of the wall thickness changing portion 23. As a result, damage to the wall portion 23ab can be suppressed, and reliability can be improved.
  • the thin-walled portion 22 has a wall portion on only one side of the groove 30, so that an increase in the wall thickness of the spiral body 20 can be suppressed. Then, in the thick portion 21 and the wall thickness changing portion 23, the chip seal 15 is supported on both sides by having wall portions on both sides of the groove 30, and the chip seal 15 can be held so as not to fall out of the groove 30.
  • the tip seal 15 has a spiral shape that is continuous from the start to the end of the spiral, and the chip seal 15 is supported by the wall portion 21a and the wall portion 21b of the thick portion 21 that periodically appear in the spiral direction. Therefore, even if the thin-walled portion 22 does not have a wall portion on one side, the chip seal 15 is supported on both sides by the thick-walled portion 21 that periodically appears in the spiral direction, so that the tip seal 15 can be prevented from falling out of the groove 30. As described above, in the first embodiment, the holding property of the tip seal 15 can be ensured while increasing the suction volume by forming the spiral body 20 into a flat shape.
  • the entire tip seal 15 has a shape along the outward surface 20a of the spiral body 20, but the following may be used.
  • the entire tip seal 15 may be along the inward surface 20b of the spiral body 20.
  • Only a part of the tip seal 15 may not be along the outward surface 20a of the spiral body 20, and the other part may not be along the outward surface 20a of the spiral body 20.
  • (3) Only a part of the tip seal 15 may not be along the inward surface 20b of the spiral body 20, and the other part may not be along the inward surface 20b of the spiral body 20.
  • the tip seal 15 is along the outward surface 20a in the thin portion 22 and the wall thickness change portion 23, and along the inward surface 20b with respect to the thick portion 21.
  • the shape is conceivable.
  • the tip seal 15 is located along the outward surface 20a in the thin portion 22 and the wall thickness changing portion 23, and the tip seal 15 is located in the radial center of the thick portion 21 with respect to the thick portion 21.
  • the shape to be located is conceivable.
  • the entire tip seal 15 has a shape along the outward surface 20a of the spiral body 20 and the tip seal 15 is located at the radial center of the thick portion 21 in the thick portion 21, the thin portion 22 Depending on the wall thickness of the tip seal 15, the inner portion of the tip seal 15 may fall off from the spiral body 20 in the thin portion 22. Therefore, in this case, a part of the chip seal 15 may be curved outward so that the chip seal 15 does not fall off in the thin portion 22.
  • the chip seal 15 can be configured as described in (2) to (3) above, the chip seal 15 is placed on the outward surface 20a or inward from the viewpoint of workability of the groove 30 in which the chip seal 15 is arranged. It is preferable that the shape is along the surface 20b. This is because the position control of the machining tool when machining the groove 30 is simple, and the grooving can be easily performed.
  • the position of the groove 30 and the position of the wall portion 22a in the thin-walled portion 22 may be reversed in the radial direction, and the wall portion 22a may be provided inside the groove 30.
  • a spiral-shaped tip seal 15 that is closer to a circle than a flat shape can be used.
  • the shape of the chip seal 15 approaches a circular shape, it is possible to equalize the force acting on the chip seal 15 as compared with the case of the flat shape. As a result, it is possible to further suppress the inconvenience of deformation and breakage of the chip seal 15 and the accompanying refrigerant leakage, and it is possible to improve reliability.
  • each of the fixed spiral body 1b and the rocking spiral body 2b has a flat shape when viewed in the axial direction of the rotating shaft 6.
  • Each of the fixed spiral body 1b and the rocking spiral body 2b has a thick-walled portion 21, a thin-walled portion 22, and a wall-thickness changing portion 23.
  • the thick portion 21 is located in the flat direction, which is the direction in which the thick portion 21 is stretched flat, and is a thick portion.
  • the thin-walled portion 22 is a portion located in a direction orthogonal to the flattening direction, and is a portion thinner than the thick-walled portion 21.
  • the wall thickness changing portion 23 is a portion between the thick wall portion 21 and the thin wall portion 22, and is a portion where the wall thickness gradually changes.
  • the thin portion 22 has a wall portion 22a on only one of the outside and the inside of the groove 30, and the thick portion 21 has a wall portion 21a and a wall portion 21b on both the outside and the inside of the groove 30.
  • the suction volume can be secured by forming the fixed spiral body 1b and the rocking spiral body 2b into a flat shape.
  • the thin-walled portion 22 has a wall portion 22a on only one of the outer side and the inner side of the groove 30.
  • the thick portion 21 has a wall portion 21a and a wall portion 21b on both the outside and the inside of the groove 30.
  • the wall thickness changing portion 23 has a wall portion 23aa and a wall portion 23ab on both the outside and the inside of the groove 30.
  • the wall portion connecting the thick portion 21 to the thin wall portion 22 gradually decreases in height in the axial direction as the wall thickness becomes thin.
  • the wall portion connecting the thick portion 21 to the thin wall portion 22 gradually increases in height in the axial direction as the wall thickness increases.
  • the wall portion connected to the wall portion 22a of the thin wall portion 22 changes in height in the axial direction as well as the wall thickness, so that the strength of the wall portion can be secured. Damage can be suppressed.
  • the tip seal 15 arranged on the fixed spiral body 1b is formed in a flat shape as a whole along the outward surface 1ba or the inward surface 1bb of the fixed spiral body 1b.
  • the tip seal 15 arranged on the oscillating spiral body 2b is formed in a flat shape as a whole along the outward surface 2ba or the inward surface 2bb of the oscillating spiral body 2b.
  • the tip seal 15 arranged on the fixed spiral body 1b has a "flat shape in which a part is along the outward surface 20a of the fixed spiral body 1b and the remaining part is not along the outward surface 20a" or "a part is an inward surface".
  • the tip seal 15 arranged on the swinging spiral body 2b has a "flat shape in which a part is along the outward surface 20a of the swinging spiral body 2b and the other part is not along the outward surface 20a" or "a part is It may be a flat shape that follows the inward surface 20b and the remaining portion does not follow the inward surface 20b.
  • the tip seal 15 may be arranged at the tip of each of the fixed spiral body 1b and the swinging spiral body 2b, and these shapes may be appropriately selected as the flat shape of the chip seal 15.
  • the low-pressure shell type scroll compressor in which the inside of the closed container 100 is filled with the low-pressure refrigerant is shown, but the high-pressure shell type scroll compressor in which the inside of the closed container 100 is filled with the high-pressure refrigerant is used. Even in this case, the same effect can be obtained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
PCT/JP2020/001009 2020-01-15 2020-01-15 スクロール圧縮機 Ceased WO2021144875A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024185038A1 (ja) * 2023-03-07 2024-09-12 三菱電機株式会社 スクロール圧縮機およびそれを備えた冷凍サイクル装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06346868A (ja) * 1993-06-08 1994-12-20 Hitachi Ltd スクロール流体機械
WO2019043741A1 (ja) * 2017-08-28 2019-03-07 三菱電機株式会社 圧縮機
JP6615425B1 (ja) * 2018-06-01 2019-12-04 三菱電機株式会社 スクロール圧縮機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06346868A (ja) * 1993-06-08 1994-12-20 Hitachi Ltd スクロール流体機械
WO2019043741A1 (ja) * 2017-08-28 2019-03-07 三菱電機株式会社 圧縮機
JP6615425B1 (ja) * 2018-06-01 2019-12-04 三菱電機株式会社 スクロール圧縮機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024185038A1 (ja) * 2023-03-07 2024-09-12 三菱電機株式会社 スクロール圧縮機およびそれを備えた冷凍サイクル装置

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