Scroll compressor

Abstract

A scroll compressor includes: a housing; a rotating shaft rotatably supported within the housing; a fixed scroll housed within and fixed to the housing; a revolving scroll revolving with the rotation of the rotating shaft; a compression chamber defined between the fixed scroll and the revolving scroll; a discharge chamber; and an oil passage. Refrigerant taken from the outside is compressed within the compression chamber. The compressed refrigerant is discharged into the discharge chamber. An outer peripheral space communicating with the compression chamber is defined between the outer peripheral surface of the fixed scroll and the inner peripheral surface of the housing. Oil separated from the refrigerant discharged into the discharge chamber is guided into the outer peripheral space through the oil passage.

Description

Technical Field

[0001] This disclosure relates to scroll compressors. Background Technology

[0002] Typically, a scroll compressor has a cylindrical housing. It also includes a rotating shaft, a fixed scroll, a reciprocating scroll, a compression chamber, and a discharge chamber. The rotating shaft is rotatably supported by the housing. The fixed scroll is housed within the housing and fixed to it. The reciprocating scroll revolves along with the rotating shaft. The compression chamber is positioned between the fixed and reciprocating scrolls. Refrigerant drawn from the outside is compressed within the compression chamber. The compressed refrigerant is then discharged into the discharge chamber.

[0003] Such scroll compressors have an oil passage for returning oil separated from the refrigerant in the discharge chamber to the compression chamber. For example, Japanese Patent Application Publication No. 2020-165362 discloses an oil passage through which a stationary scroll member passes. Furthermore, the oil separated from the refrigerant flows back to the outermost periphery of the compression chamber in a depressurized state via the oil passage. The oil returning to the compression chamber helps lubricate the stationary and reciprocating scroll members. Summary of the Invention

[0004] The problem that the invention aims to solve

[0005] When the oil passage runs through the stationary scroll component, an oil passage needs to be configured in the thick-walled portion of the stationary scroll component, thus restricting the layout of the oil passage. Consequently, depending on the location of the oil passage, it may be difficult for oil to flow smoothly back to the compression chamber. As a result, there is insufficient lubrication between the stationary and rotary scroll components, thus reducing the reliability of the scroll compressor.

[0006] Methods for solving problems

[0007] One aspect of this disclosure relates to a scroll compressor comprising: a housing; a rotating shaft rotatably supported in the housing; a fixed scroll housing housed within and fixed to the housing; a revolving scroll revolving in conjunction with the rotation of the rotating shaft; a compression chamber defined between the fixed scroll and the revolving scroll; a discharge chamber; and an oil passage, wherein refrigerant taken in from the outside is compressed in the compression chamber, and the compressed refrigerant is discharged into the discharge chamber; an outer peripheral space communicating with the compression chamber is defined between the outer peripheral surface of the fixed scroll and the inner peripheral surface of the housing, and oil separated from the refrigerant discharged into the discharge chamber is guided into the outer peripheral space through the oil passage. Attached Figure Description

[0008] Figure 1 This is a cross-sectional view of the scroll compressor in the implementation method.

[0009] Figure 2 It is shown Figure 1 An exploded perspective view of a portion of a scroll compressor.

[0010] Figure 3 This is an exploded perspective view showing a portion of a scroll compressor.

[0011] Figure 4 It is Figure 1 An enlarged cross-sectional view of a portion of a scroll compressor is shown.

[0012] Figure 5 This is an enlarged cross-sectional view showing a portion of the scroll compressor in the first modified example.

[0013] Figure 6 This is an enlarged cross-sectional view showing a portion of the scroll compressor in the second modified example.

[0014] Figure 7 This is an enlarged cross-sectional view showing a portion of the scroll compressor in the third modified example.

[0015] Explanation of reference numerals in the attached figures

[0016] 10…Scroll compressor, 11…Casing, 14…Discharge casing component, 15…Rotating shaft, 25…Fixed scroll component, 25a…Fixed base plate, 25b…Fixed scroll wall, 25c…Outer peripheral wall, 26…Rotating scroll component, 27…Compression chamber, 39…Suction port, 40…Discharge chamber, 50…Oil reservoir, 70…Sealing gasket, 80…Oil passage, 81…Throttling groove, 82…Connecting passage, 141…Second annular end face as an annular end face, S1…Outer peripheral space. Detailed Implementation

[0017] The following is in accordance with Figures 1-4 The scroll compressor described in this embodiment will be explained. For example, the scroll compressor of this embodiment is used in a vehicle air conditioning (air conditioning) system.

[0018] <Basic Components of a Scroll Compressor 10>

[0019] like Figure 1 As shown, the scroll compressor 10 includes a cylindrical housing 11. The housing 11 includes a motor housing member 12, a shaft support housing member 13, and a discharge housing member 14. The motor housing member 12, shaft support housing member 13, and discharge housing member 14 are made of metal. For example, the motor housing member 12, shaft support housing member 13, and discharge housing member 14 are made of aluminum. Furthermore, the scroll compressor 10 includes a rotating shaft 15. The rotating shaft 15 is housed within the housing 11.

[0020] The motor housing component 12 has a plate-shaped end wall 12a and a cylindrical peripheral wall 12b. The peripheral wall 12b extends cylindrically from the outer periphery of the end wall 12a. The axial direction of the peripheral wall 12b is aligned with the axial direction of the rotating shaft 15. The motor housing component 12 has a plurality of internally threaded holes 12c. Each internally threaded hole 12c opens at the opening end of the peripheral wall 12b. Furthermore, in Figure 1 For ease of explanation, only one internal threaded hole 12c is shown in the diagram. Additionally, the motor housing member 12 has a suction port 12h. Refrigerant is drawn in through the suction port 12h. The suction port 12h opens into the portion near the end wall 12a in the peripheral wall 12b. The suction port 12h connects the inside and outside of the motor housing member 12.

[0021] The motor housing member 12 has a cylindrical protrusion 12d. The protrusion 12d protrudes from the center of the inner surface of the end wall 12a. The first axial end of the rotating shaft 15 is inserted into the protrusion 12d. The scroll compressor 10 includes a bearing 16. The bearing 16 is, for example, a rolling bearing. The bearing 16 is disposed between the inner circumferential surface of the protrusion 12d and the outer circumferential surface of the first end of the rotating shaft 15. Furthermore, the first end of the rotating shaft 15 is rotatably supported on the motor housing member 12 via the bearing 16.

[0022] The shaft support housing member 13 has a plate-shaped end wall 17 and a cylindrical peripheral wall 18. The peripheral wall 18 extends cylindrically from the outer periphery of the end wall 17. The axial direction of the peripheral wall 18 is aligned with the axial direction of the rotating shaft 15. In addition, the shaft support housing member 13 has an annular flange wall 19. The flange wall 19 extends radially outward from the end of the outer peripheral surface of the peripheral wall 18 opposite to the end wall 17 toward the rotating shaft 15.

[0023] The shaft support housing component 13 has a circular through hole 17a. The through hole 17a opens at the center of the end wall 17. The through hole 17a extends through the end wall 17 in the thickness direction. A rotating shaft 15 is inserted into the through hole 17a. The second end of the rotating shaft 15 in the axial direction has an end face 15e. The end face 15e is located inside the peripheral wall 18.

[0024] The scroll compressor 10 includes a bearing 21. The bearing 21 is, for example, a rolling bearing. The bearing 21 is disposed between the inner circumferential surface of the peripheral wall 18 and the outer circumferential surface of the rotating shaft 15. Furthermore, the rotating shaft 15 is rotatably supported on the shaft support housing member 13 via the bearing 21. Therefore, the shaft support housing member 13 supports the rotating shaft 15 so that it can rotate. In this way, the rotating shaft 15 is rotatably supported on the housing 11.

[0025] The shaft support housing component 13 has a plurality of bolt insertion holes 19a. Each bolt insertion hole 19a opens into the outer periphery of the flange wall 19. Each bolt insertion hole 19a penetrates the flange wall 19 in the thickness direction. Each bolt insertion hole 19a of the flange wall 19 communicates with each internal threaded hole 12c of the motor housing component 12. Furthermore, in Figure 1 For ease of explanation, only one bolt insertion hole 19a is shown in the figure.

[0026] The scroll compressor 10 includes a motor chamber 20. The motor chamber 20 is defined by a motor housing member 12 and a shaft support housing member 13. The motor housing member 12 and the shaft support housing member 13 together define the motor chamber 20. Thus, the motor chamber 20 is defined within the housing 11. The motor chamber 20 communicates with a suction inlet 12h. Refrigerant drawn in through the suction inlet 12h is drawn into the motor chamber 20. Therefore, the motor chamber 20 is a suction pressure region.

[0027] The scroll compressor 10 includes a motor 22. The motor 22 is housed within a motor chamber 20. The motor 22 includes a cylindrical stator 23 and a cylindrical rotor 24. The rotor 24 is disposed inside the stator 23. The rotor 24 rotates integrally with the rotating shaft 15. The stator 23 surrounds the rotor 24. The rotor 24 has a rotor core 24a fixed to the rotating shaft 15 and a plurality of permanent magnets (not shown) disposed on the rotor core 24a.

[0028] The stator 23 has a cylindrical stator core 23a and a motor coil 23b. The stator core 23a is fixed to the inner circumferential surface of the peripheral wall 12b of the motor housing member 12. The motor coil 23b is wound around the stator core 23a. The rotor 24 rotates by supplying power controlled by a converter (not shown) to the motor coil 23b. As a result, the rotating shaft 15 rotates integrally with the rotor 24. Therefore, the motor 22 causes the rotating shaft 15 to rotate.

[0029] The scroll compressor 10 includes a compression mechanism C1. The compression mechanism C1 has a fixed scroll member 25 and a rotating scroll member 26. Therefore, the scroll compressor 10 includes a fixed scroll member 25 and a rotating scroll member 26. The compression mechanism C1 is scroll-type. The rotating scroll member 26 revolves relative to the fixed scroll member 25 in conjunction with the rotation of the rotating shaft 15.

[0030] like Figure 1 and Figure 2As shown, the fixed vortex member 25 has a fixed base plate 25a and a fixed vortex wall 25b. The fixed base plate 25a is circular. An outlet hole 25h is formed in the center of the fixed base plate 25a. The outlet hole 25h is circular. The outlet hole 25h penetrates the fixed base plate 25a in the thickness direction. The fixed vortex wall 25b extends from the fixed base plate 25a. In addition, the fixed vortex member 25 has an outer peripheral wall 25c. The outer peripheral wall 25c extends from the outer periphery of the fixed base plate 25a. The outer peripheral wall 25c surrounds the fixed vortex wall 25b.

[0031] like Figure 1 and Figure 3 As shown, the fixed vortex member 25 has a first discharge chamber forming recess 41 and a first oil reservoir forming recess 51. The first discharge chamber forming recess 41 and the first oil reservoir forming recess 51 open onto the end face 25e of the fixed substrate 25a. The end face 25e of the fixed substrate 25a has a first annular end face 251 and a first connecting end face 252. The first annular end face 251 is annular and extends along the outer periphery of the fixed substrate 25a. The first connecting end face 252 is elongated and strip-shaped. The first connecting end face 252 is connected to the first annular end face 251 and extends between the first discharge chamber forming recess 41 and the first oil reservoir forming recess 51.

[0032] The discharge port 25h opens onto the bottom surface of the recess 41 formed in the first discharge chamber. (Example) Figure 1 As shown, the scroll compressor 10 includes a valve mechanism 25v. The valve mechanism 25v is mounted on the bottom surface of the recess 41 formed in the first discharge chamber. The valve mechanism 25v is configured to open and close the discharge port 25h.

[0033] The gyratory scroll member 26 has a gyratory base plate 26a and a gyratory scroll wall 26b. The gyratory base plate 26a is circular. The gyratory base plate 26a faces the fixed base plate 25a. The gyratory scroll wall 26b extends from the gyratory base plate 26a toward the fixed base plate 25a. The gyratory scroll wall 26b engages with the fixed scroll wall 25b. The gyratory scroll member 26 is located inside the outer peripheral wall 25c. The gyratory scroll member 26 revolves inside the outer peripheral wall 25c. The top surface of the fixed scroll wall 25b contacts the gyratory base plate 26a.

[0034] The scroll compressor 10 includes a compression chamber 27. The compression chamber 27 is defined by a fixed base plate 25a, a fixed scroll wall 25b, a rotating base plate 26a, and a rotating scroll wall 26b. Therefore, the compression chamber 27 is defined between the fixed scroll member 25 and the rotating scroll member 26. Refrigerant taken in from the outside is compressed in the compression chamber 27.

[0035] The rotary base plate 26a has a cylindrical protrusion 26c. The protrusion 26c protrudes from the end face 26e of the rotary base plate 26a opposite to the fixed base plate 25a. The axial direction of the protrusion 26c is aligned with the axial direction of the rotation shaft 15. Furthermore, the rotary base plate 26a has a plurality of grooves 26d. The plurality of grooves 26d are respectively disposed around the protrusion 26c in the end face 26e of the rotary base plate 26a. The plurality of grooves 26d are arranged at predetermined intervals in the circumferential direction of the rotation shaft 15. Moreover, in... Figure 1 For ease of explanation, only one groove 26d is shown in the diagram. A circular ring member 28 is fitted into each groove 26d. A pin 29 is inserted into each ring member 28. Each pin 29 protrudes from the end face 13e of the shaft support housing member 13, facing the gyratory scroll member 26.

[0036] The scroll compressor 10 includes an elastic plate 30. The elastic plate 30 is annular. The elastic plate 30 is sandwiched between the end face 13e of the shaft support housing member 13 and the open end face of the outer peripheral wall 25c. Furthermore, the elastic plate 30 always applies force to the rotating scroll member 26 toward the fixed scroll member 25.

[0037] The scroll compressor 10 includes an eccentric shaft 31. The eccentric shaft 31 protrudes from the end face 15e of the rotating shaft 15 at a position eccentric to the axis L1 of the rotating shaft 15 toward the scroll member 26. The eccentric shaft 31 is integrally formed with the rotating shaft 15. The axial direction of the eccentric shaft 31 is aligned with the axial direction of the rotating shaft 15. The eccentric shaft 31 is inserted into the protrusion 26c.

[0038] The scroll compressor 10 includes a counterweight 32 and a bushing 33. The bushing 33 is fitted into the outer peripheral surface of the eccentric shaft 31. The counterweight 32 is integral with the bushing 33. The counterweight 32 is integrally formed in the bushing 33. The counterweight 32 is housed within the peripheral wall 18 of the shaft support housing member 13. The rotary scroll member 26 is rotatably supported on the eccentric shaft 31 relative to the eccentric shaft 31 via the bushing 33 and the rolling bearing 34.

[0039] The rotation of the rotating shaft 15 is transmitted to the gyratory scroll member 26 via the eccentric shaft 31, bushing 33, and rolling bearing 34. This causes the gyratory scroll member 26 to rotate. Furthermore, the rotation of the gyratory scroll member 26 is prevented by the contact between each pin 29 and the inner circumferential surface of each ring member 28, allowing only its revolution. Thus, the gyratory scroll member 26 revolves with its gyratory scroll wall 26b in contact with the fixed scroll wall 25b. Accompanying the revolution of the gyratory scroll member 26, the volume of the compression chamber 27 decreases, thereby compressing the refrigerant within the compression chamber 27. The gyratory scroll member 26 revolves inside the outer circumferential wall 25c, accompanying the rotation of the rotating shaft 15. The counterweight 32 counteracts the centrifugal force acting on the gyratory scroll member 26 during its revolution. This reduces the imbalance of the gyratory scroll member 26.

[0040] like Figure 1 and Figure 2 As shown, the ejector housing member 14 has a plate-shaped end wall 14a and a cylindrical peripheral wall 14b. The peripheral wall 14b extends cylindrically from the outer periphery of the end wall 14a. The axial direction of the peripheral wall 14b is aligned with the axial direction of the rotation shaft 15. The peripheral wall 14b surrounds the fixed vortex member 25. Therefore, the fixed vortex member 25 is housed within the housing 11.

[0041] The ejector housing component 14 has a plurality of bolt through holes 14c. These bolt through holes 14c open into the peripheral wall 14b. Furthermore, in Figure 1 For ease of explanation, only one bolt insertion hole 14c is shown in the diagram. Each bolt insertion hole 14c is connected to the corresponding bolt insertion hole 19a on the flange wall 19.

[0042] Bolts B1, passing through bolt insertion holes 14c, pass through bolt insertion holes 19a in flange wall 19 and are threadedly engaged with internal threaded holes 12c in motor housing member 12. Thus, shaft support housing member 13 is connected to the peripheral wall 12b of motor housing member 12, and ejector housing member 14 is connected to the flange wall 19 of shaft support housing member 13. Therefore, motor housing member 12, shaft support housing member 13, and ejector housing member 14 are arranged in this order along the axial direction of rotating shaft 15. Fixed scroll member 25 is clamped by end wall 14a of ejector housing member 14 and shaft support housing member 13. In this way, fixed scroll member 25 is fixed to housing 11. Ejector housing member 14 is connected to fixed scroll member 25.

[0043] like Figure 2As shown, the ejector housing member 14 has a second ejector chamber forming recess 42 and a second oil reservoir forming recess 52. The second ejector chamber forming recess 42 and the second oil reservoir forming recess 52 open onto the inner end face 14e of the end wall 14a. The second ejector chamber forming recess 42 has a shape substantially the same as the first ejector chamber forming recess 41. The second oil reservoir forming recess 52 has a shape substantially the same as the first oil reservoir forming recess 51.

[0044] The inner end face 14e of the end wall 14a has a second annular end face 141 and a second connecting end face 142. The second annular end face 141 is annular and extends along the outer periphery of the inner end face 14e of the end wall 14a. The second connecting end face 142 is elongated and strip-shaped. The second connecting end face 142 is connected to the second annular end face 141 and extends between the second discharge chamber forming recess 42 and the second oil reservoir forming recess 52.

[0045] like Figure 2 and Figure 3 As shown, the second annular end face 141 extends along the first annular end face 251. The second annular end face 141 is a mating surface with the first annular end face 251. Therefore, the second annular end face 141 is an annular end face configured to mate with the fixed substrate 25a. The second connecting end face 142 extends along the first connecting end face 252. The second connecting end face 142 is a mating surface with the first connecting end face 252.

[0046] <Outer Peripheral Space S1>

[0047] like Figure 1 As shown, an outer peripheral space S1 is defined between the outer peripheral surface of the outer peripheral wall 25c and the inner peripheral surface of the peripheral wall 14b. Therefore, an outer peripheral space S1 is defined between the outer peripheral surface of the fixed scroll member 25 and the inner peripheral surface of the housing 11. The outer peripheral space S1 extends annularly around the fixed scroll member 25. The outer peripheral space S1 is an annular gap existing between the outer peripheral surface of the outer peripheral wall 25c and the inner peripheral surface of the peripheral wall 14b.

[0048] The scroll compressor 10 includes a suction passage 35. The suction passage 35 has a plurality of first grooves 36, a plurality of first holes 37, and a plurality of second grooves 38. The first grooves 36 are disposed on the inner circumferential surface of the peripheral wall 12b. The first grooves 36 open at the opening end of the peripheral wall 12b. The first holes 37 are disposed on the outer circumferential portion of the flange wall 19 of the shaft support housing member 13. The first holes 37 penetrate the flange wall 19 in the thickness direction. Each first hole 37 communicates with a corresponding first groove 36. The second grooves 38 are disposed on the inner circumferential surface of the peripheral wall 14b of the discharge housing member 14. Each second groove 38 communicates with a corresponding first hole 37. Each second groove 38 defines a portion of the outer circumferential space S1.

[0049] An intake hole 39 is provided on the outer peripheral wall 25c of the fixed vortex member 25. The intake hole 39 penetrates the outer peripheral wall 25c in the thickness direction. The intake hole 39 communicates with the outer peripheral space S1. The intake hole 39 communicates with the outermost peripheral part of the compression chamber 27. Therefore, the outer peripheral space S1 communicates with the compression chamber 27 through the intake hole 39.

[0050] Refrigerant in the motor chamber 20 is drawn into the compression chamber 27 through the first slot 36, the first hole 37, the second slot 38, and the suction hole 39. Therefore, refrigerant is drawn into the compression chamber 27 through the suction hole 39. The first slot 36, the first hole 37, the second slot 38, and the suction hole 39 constitute the suction pressure region where the refrigerant drawn into the compression chamber 27 flows. Therefore, the outer peripheral space S1 is the suction pressure region. The refrigerant drawn into the compression chamber 27 is compressed within the compression chamber 27 by the revolution of the vortex member 26. In this way, the compression mechanism C1 compresses the refrigerant drawn into the housing 11.

[0051] <Sealing gasket 70>

[0052] like Figure 2 and Figure 3 As shown, the scroll compressor 10 includes a plate-shaped sealing gasket 70. The sealing gasket 70 is a thin metal plate. The sealing gasket 70 is annular. The sealing gasket 70 seals the end wall 14a of the discharge housing member 14 with the fixed base plate 25a.

[0053] The sealing gasket 70 has a discharge chamber communication hole 70a and an oil reservoir communication hole 70b. The discharge chamber communication hole 70a has a shape that is substantially the same as the first discharge chamber forming recess 41 and the second discharge chamber forming recess 42. The oil reservoir communication hole 70b has a shape that is substantially the same as the first oil reservoir forming recess 51 and the second oil reservoir forming recess 52.

[0054] The sealing gasket 70 has a first sealing portion 71 and a second sealing portion 72. The first sealing portion 71 is annular. The first sealing portion 71 extends along a first annular end face 251 and a second annular end face 141. The first sealing portion 71 is located between the first annular end face 251 and the second annular end face 141. The first sealing portion 71 seals between the first annular end face 251 and the second annular end face 141. Therefore, the sealing gasket 70 seals between the second annular end face 141 and the fixed substrate 25a.

[0055] The second sealing portion 72 is connected at two different points circumferentially to the first sealing portion 71. The second sealing portion 72 is an elongated strip. The second sealing portion 72 extends along the first connecting end face 252 and the second connecting end face 142. The second sealing portion 72 is located between the first connecting end face 252 and the second connecting end face 142. The second sealing portion 72 seals the space between the first connecting end face 252 and the second connecting end face 142. The second sealing portion 72 separates the discharge chamber communication hole 70a from the oil reservoir communication hole 70b. The second sealing portion 72 has a through hole 73.

[0056] like Figure 2 and Figure 3 As shown, the first discharge chamber forming recess 41 and the second discharge chamber forming recess 42 are connected via a discharge chamber communication hole 70a. Furthermore, the first discharge chamber forming recess 41 and the second discharge chamber forming recess 42 define the discharge chamber 40. Therefore, the scroll compressor 10 includes a discharge chamber 40. The refrigerant compressed in the compression chamber 27 is discharged into the discharge chamber 40.

[0057] The first oil reservoir forming recess 51 and the second oil reservoir forming recess 52 are connected via an oil reservoir connecting hole 70b. Furthermore, the first oil reservoir forming recess 51 and the second oil reservoir forming recess 52 define an oil reservoir 50. Therefore, the scroll compressor 10 includes an oil reservoir 50. Oil separated from the refrigerant discharged into the discharge chamber 40 is stored in the oil reservoir 50. The discharge chamber 40 and the oil reservoir 50 are defined by the fixed scroll member 25 and the discharge housing member 14. The discharge housing member 14, together with the fixed base plate 25a, defines the discharge chamber 40 and the oil reservoir 50. The discharge chamber 40 and the oil reservoir 50 are defined by the discharge housing member 14 and the fixed base plate 25a on the inner side of the second annular end face 141.

[0058] The discharge chamber 40 and the oil reservoir 50 are sealed by the second sealing portion 72 of the sealing gasket 70. Therefore, the second sealing portion 72 seals the discharge chamber 40 and the oil reservoir 50. Thus, the sealing gasket 70 seals the discharge chamber 40 and the oil reservoir 50. In this embodiment, the scroll compressor 10 is mounted in a vehicle with the oil reservoir 50 located below the discharge chamber 40.

[0059] like Figure 1 As shown, the scroll compressor 10 includes an oil separation chamber 60. The oil separation chamber 60 is disposed inside the discharge housing member 14. The oil separation chamber 60 is defined within an elongated cylindrical outer cylinder 61, which is part of the end wall 14a. The first end of the outer cylinder 61 becomes a discharge port 62 for discharging refrigerant to the outside. The discharge port 62 communicates with the oil separation chamber 60.

[0060] An inner cylinder 63 is embedded within the oil separation chamber 60. The axial direction of the inner cylinder 63 is aligned with the radial direction of the rotating shaft 15. The first end of the inner cylinder 63 communicates with the discharge port 62. The second end of the inner cylinder 63 communicates with the side of the oil separation chamber 60 opposite to the discharge port 62. Additionally, as... Figure 1 and Figure 2 As shown, an inlet hole 64 is provided on the outer cylinder 61. The inlet hole 64 connects the discharge chamber 40 and the oil separation chamber 60. The inlet hole 64 guides the refrigerant discharged into the discharge chamber 40 into the oil separation chamber 60.

[0061] The discharge housing component 14 has an oil drain hole 65. The first end of the oil drain hole 65 is connected to the side of the oil separation chamber 60 opposite to the discharge port 62. For example... Figure 2 As shown, the second end of the oil drain hole 65 opens onto the second connecting end face 142 of the discharge housing member 14. The oil drain hole 65 communicates with the through hole 73 of the sealing gasket 70. Furthermore, the oil separation chamber 60 communicates with the first oil storage chamber through the oil drain hole 65 and the through hole 73, forming a recess 51. Thus, the oil separation chamber 60 communicates with the oil storage chamber 50 through the oil drain hole 65 and the through hole 73.

[0062] like Figure 1 As shown, the refrigerant is compressed in the compression chamber 27 and discharged into the discharge chamber 40 through the discharge port 25h, and introduced into the oil separation chamber 60 through the inlet port 64. The refrigerant introduced into the oil separation chamber 60 swirls around the inner cylinder 63. This imparts centrifugal force to the oil contained in the refrigerant, causing the oil to separate from the refrigerant within the oil separation chamber 60. Therefore, the oil contained in the refrigerant discharged into the discharge chamber 40 is separated from the refrigerant within the oil separation chamber 60.

[0063] The refrigerant from which the oil has separated flows into and through the inner cylinder 63. Then, the refrigerant that has passed through the inner cylinder 63 flows out through the discharge port 62 into an external refrigerant circuit (not shown). The oil separated from the refrigerant in the oil separation chamber 60 flows towards the oil drain port 65 due to its own weight. Then, the oil flowing towards the oil drain port 65 is discharged into the oil storage chamber 50 through the oil drain port 65 and the through hole 73, and stored in the oil storage chamber 50.

[0064] <Oil Channel 80>

[0065] like Figure 3As shown, the scroll compressor 10 includes an oil passage 80. Oil separated from the refrigerant discharged into the discharge chamber 40 is guided to the outer peripheral space S1 through the oil passage 80. The oil passage 80 includes a throttling groove 81 and a connecting passage 82. The throttling groove 81 is disposed on the gasket 70. The throttling groove 81 extends along the first sealing portion 71 of the gasket 70. The throttling groove 81 penetrates the gasket 70 in the thickness direction. The throttling groove 81 is a slit provided in the gasket 70. The first end of the throttling groove 81 communicates with the lower space in the oil reservoir 50. Therefore, the throttling groove 81 communicates with the oil reservoir 50. The second end of the throttling groove 81 is approximately 180 degrees away from the first end of the throttling groove 81 in the circumferential direction of the gasket 70. The throttling groove 81 is closed by a first annular end face 251 and a second annular end face 141. Therefore, the throttling groove 81 is closed by the discharge housing member 14 and the fixed scroll member 25.

[0066] like Figure 3 and Figure 4 As shown, a connection passage 82 is provided on the fixed substrate 25a. The connection passage 82 is a groove provided on the first annular end face 251. The first end of the connection passage 82 communicates with the second end of the throttling groove 81. The second end of the connection passage 82 opens at the outer periphery of the fixed substrate 25a. Furthermore, as... Figure 4 As shown, the second end of the connecting passage 82 is connected to the outer peripheral space S1. Thus, the connecting passage 82 connects the throttling groove 81 to the outer peripheral space S1. Similarly, the oil passage 80 is disposed between the second annular end face 141 and the fixed base plate 25a, connecting the oil reservoir 50 to the outer peripheral space S1. Therefore, the oil passage 80 is connected to the outer peripheral space S1.

[0067] The opening position of the connecting passage 82 relative to the outer periphery of the fixed substrate 25a is in the same phase position in the circumferential direction of the rotation axis 15 relative to the opening of the suction hole 39 communicating with the outer peripheral space S1. Therefore, the oil passage 80 communicates with the outer peripheral space S1 in such a way that the opening of the oil passage 80 communicating with the outer peripheral space S1 is in the same phase position in the circumferential direction of the rotation axis 15 relative to the opening of the suction hole 39 communicating with the outer peripheral space S1.

[0068] [The Role of the Implementation Method]

[0069] Next, the function of this embodiment will be explained.

[0070] The oil stored in the oil reservoir 50 flows back to the outer peripheral space S1 through the oil passage 80. At this time, the oil passes through the throttling groove 81, so the oil stored in the oil reservoir 50 flows back to the outer peripheral space S1 in a depressurized state through the oil passage 80. The oil flowing back to the outer peripheral space S1, together with the refrigerant from the motor chamber 20 through the first groove 36, the first hole 37, and the second groove 38, flows back to the compression chamber 27 through the suction hole 39. The oil flowing back to the compression chamber 27 helps to lubricate the fixed scroll member 25 and the rotating scroll member 26.

[0071] [Effects of the Implementation Method]

[0072] The following effects can be obtained from the above embodiments.

[0073] (1) An outer peripheral space S1, communicating with the compression chamber 27, is defined between the outer peripheral surface of the fixed scroll member 25 and the inner peripheral surface of the housing 11. In the scroll compressor 10, an oil passage 80 is provided to guide oil separated from the refrigerant discharged to the discharge chamber 40 to the outer peripheral space S1. Therefore, the oil passage 80 only needs to communicate with the outer peripheral space S1, allowing for free setting of its configuration relative to the outer peripheral space S1. Thus, the limitation of the oil passage 80 layout, which required it to penetrate the thick-walled portion of the fixed scroll member 25 as in conventional technology, is eliminated, increasing the design freedom of the oil passage 80. As a result, oil can easily flow back to the compression chamber 27, ensuring good lubrication between the fixed scroll member 25 and the rotating scroll member 26. Based on the above, the reliability of the scroll compressor 10 can be improved.

[0074] (2) An oil passage 80 is disposed between the second annular end face 141 and the fixed substrate 25a, connecting the oil storage chamber 50 to the outer peripheral space S1. The area between the second annular end face 141 and the fixed substrate 25a is suitable as a location for providing the oil passage 80 that connects the oil storage chamber 50 to the outer peripheral space S1.

[0075] (3) The oil passage 80 includes a throttling groove 81 disposed on the sealing gasket 70, which communicates with the oil reservoir 50. Accordingly, the pressure in the outer peripheral space S1 becomes lower than the pressure in the oil reservoir 50, so the oil flowing from the oil reservoir 50 to the outer peripheral space S1 via the oil passage 80 is easily stored in the outer peripheral space S1. Therefore, for example, in the scroll compressor 10, even under operating conditions where the oil stored in the oil reservoir 50 is difficult to flow to the outer peripheral space S1 via the oil passage 80, the oil is easily stored in the outer peripheral space S1. As a result, less oil is easily prevented from flowing back to the compression chamber 27, thus ensuring good lubrication between the stationary scroll member 25 and the rotating scroll member 26.

[0076] (4) For example, if the connection passage connecting the throttling groove 81 to the outer peripheral space S1 is provided on the sealing gasket 70, a cutout will be provided in the outer peripheral opening of the sealing gasket 70 in a part of the sealing gasket 70. As a result, the shape of the sealing gasket 70 becomes unstable, and the assemblability deteriorates. Therefore, the connection passage 82 connecting the throttling groove 81 to the outer peripheral space S1 is formed on the fixed substrate 25a. Accordingly, it is not necessary to form a cutout in the outer peripheral opening of the sealing gasket 70 in a part of the sealing gasket 70, so the shape of the sealing gasket 70 is stable. Therefore, the assemblability does not deteriorate, and the reliability of the scroll compressor 10 can be improved.

[0077] (5) The oil passage 80 is connected to the outer peripheral space S1 in such a way that the opening of the oil passage 80 communicating with the outer peripheral space S1 is in the same phase position relative to the opening of the suction port 39 communicating with the outer peripheral space S1 in the circumferential direction of the rotation shaft 15. For example, consider the case where the opening of the oil passage 80 communicating with the outer peripheral space S1 is offset in phase position relative to the opening of the suction port 39 communicating with the outer peripheral space S1 in the circumferential direction of the rotation shaft 15. Compared to this case, the oil flowing from the oil passage 80 into the outer peripheral space S1 flows smoothly into the suction port 39. Therefore, the oil in the outer peripheral space S1 can easily flow back to the compression chamber 27 through the suction port 39, thus ensuring good lubrication between the stationary scroll member 25 and the rotating scroll member 26.

[0078] [Example of Change]

[0079] Furthermore, the above-described embodiments can be implemented with the following modifications. The above-described embodiments and the following modifications can be combined with each other to implement them within the scope of technical inconsistency.

[0080] ○ can also be, for example Figure 5 As shown in the first modified example, the sealing gasket 70 does not have a throttling groove 81, but instead, for example, the fixed scroll member 25 has an oil passage 80. The oil passage 80 extends through the interior of the fixed base plate 25a and connects the oil reservoir 50 to the outer peripheral space S1. In this case, a throttling member 83 is provided in the oil passage 80. Accordingly, only the design of the fixed base plate 25a needs to be changed to form the oil passage 80. Therefore, the reliability of the scroll compressor 10 can be improved in a way that does not complicate the configuration of the scroll compressor 10.

[0081] ○ can also be, for example Figure 6As shown in the second modification, the sealing gasket 70 does not have a throttling groove 81, but instead, for example, the discharge housing member 14 has an oil passage 80. The oil passage 80 extends through the interior of the discharge housing member 14 and connects the oil reservoir 50 to the outer peripheral space S1. In this case, a throttling member 83 is provided in the oil passage 80. Accordingly, only the design of the discharge housing member 14 needs to be changed to form the oil passage 80. Therefore, the reliability of the scroll compressor 10 can be improved in a way that does not complicate the configuration of the scroll compressor 10.

[0082] ○ can also be, for example Figure 7 As shown in the third modification, the sealing gasket 70 does not have a throttling groove 81, but instead, a throttling member is provided on the oil flow path between the outer peripheral space S1 and the compression chamber 27, making the outer peripheral space S1 a discharge pressure area. In the third modification, no suction hole 39 is provided on the outer peripheral wall 25c of the fixed scroll member 25. Furthermore, a plurality of passage recesses 25g are provided on the open end face of the outer peripheral wall 25c. Each passage recess 25g opens onto the open end face of the outer peripheral wall 25c. Each passage recess 25g opens onto the inner peripheral surface of the outer peripheral wall 25c. Each passage recess 25g, for example, communicates with the corresponding first hole 37. Furthermore, the refrigerant in the motor chamber 20 is drawn into the compression chamber 27 through the first groove 36, the first hole 37, and the passage recesses 25g.

[0083] For example, the fixed scroll member 25 may have an oil passage 80. Alternatively, a connecting passage 84 may be provided on the outer peripheral wall 25c of the fixed scroll member 25. The connecting passage 84 extends axially in the outer peripheral wall 25c. A first end of the connecting passage 84 communicates with the outer peripheral space S1. A second end of the connecting passage 84 opens into the bottom surface of one of the plurality of passage recesses 25g. The connecting passage 84 communicates with the inner side of one of the plurality of passage recesses 25g. A throttling member 83 is provided within the connecting passage 84. In this way, by providing a throttling member in the oil flow path between the outer peripheral space S1 and the compression chamber 27, the outer peripheral space S1 can be made into a discharge pressure region.

[0084] Accordingly, the pressure in the outer peripheral space S1 can be made equal to the pressure in the oil storage chamber 50, so the oil stored in the oil storage chamber 50 flows smoothly to the outer peripheral space S1 through the oil passage 80. Furthermore, because a throttling member 83 is provided in the connecting passage 84, the oil flowing back to the outer peripheral space S1 is stably stored in the outer peripheral space S1.

[0085] Alternatively, the sealing gasket 70 may not have a throttling groove 81, but instead, a throttling groove may be provided, for example, on the first annular end face 251 of the fixed vortex member 25. Alternatively, a throttling groove may be provided, for example, on the second annular end face 141 of the discharge housing member 14. In this case, the connecting passage 82 is provided on the second annular end face 141. In this way, the oil passage 80 may also be provided between the second annular end face 141 and the fixed base plate 25a, connecting the oil reservoir 50 to the outer peripheral space S1.

[0086] Alternatively, the connection passage connecting the throttling groove 81 to the outer peripheral space S1 can be provided in the sealing gasket 70.

[0087] Alternatively, the opening of the oil passage 80 communicating with the outer peripheral space S1 may be offset in the circumferential phase position from the opening of the suction port 39 communicating with the outer peripheral space S1 relative to the opening of the suction port 39 communicating with the outer peripheral space S1. Accordingly, for example, oil flowing back from the oil passage 80 to the outer peripheral space S1 does not flow directly to the suction port 39, but is easily temporarily stored in the outer peripheral space S1. Therefore, the outer peripheral space S1 can easily function as an oil storage space.

[0088] Alternatively, the sealing gasket 70 may not have a throttling groove 81, but rather, for example, the elastic plate 30 may have a throttling groove. In this case, the oil stored in the oil reservoir 50 flows back to the outer peripheral space S1 through the hole through the fixed vortex member 25 and the throttling groove provided on the elastic plate 30.

[0089] The number of suction holes 39 is not particularly limited. Furthermore, the number of oil passages 80 can be varied, for example, to match the number of suction holes 39. For example, it can be configured such that the openings of each oil passage 80 communicating with the outer peripheral space S1 are at the same phase position relative to the openings of each suction hole 39 communicating with the outer peripheral space S1 in the circumferential direction of the rotation axis 15, and each oil passage 80 communicates with the outer peripheral space S1.

[0090] Alternatively, the peripheral wall 12b of the motor housing component 12 may surround the fixed scroll member 25. Furthermore, an outer peripheral space S1 may be defined between the outer peripheral surface of the outer peripheral wall 25c and the inner peripheral surface of the peripheral wall 12b. In short, the outer peripheral space S1 only needs to be defined between the outer peripheral surface of the fixed scroll member 25 and the inner peripheral surface of the housing 11.

[0091] Alternatively, the outer peripheral space S1 may not extend in a ring around the fixed vortex member 25. In short, the outer peripheral space S1 only needs to be the space defined between the outer peripheral surface of the fixed vortex member 25 and the inner peripheral surface of the housing 11, and communicating with the compression chamber 27.

[0092] ○The scroll compressor 10 may also be a type that is not driven by the motor 22, for example, it may be a type that is driven by the vehicle's engine.

[0093] The scroll compressor 10 is used in vehicle air conditioning systems, but is not limited to this. In short, the scroll compressor 10 only needs to compress the refrigerant, and its application can be appropriately changed.

Claims

1. A scroll compressor, comprising: case; A rotating shaft is rotatably supported on the housing; A fixed scroll component is housed within the housing and fixed to the housing; The vortex component revolves in tandem with the rotation of the rotating shaft; The compression chamber is located between the fixed scroll member and the rotating scroll member; Discharge chamber; as well as Oil passage, The refrigerant drawn from the outside is compressed in the compression chamber. The refrigerant, compressed in the compression chamber, is discharged into the discharge chamber. An outer peripheral space communicating with the compression chamber is defined between the outer peripheral surface of the fixed vortex component and the inner peripheral surface of the housing. The oil separated from the refrigerant from the discharge chamber is guided into the outer peripheral space through the oil passage. The scroll compressor also includes an oil storage chamber for storing the oil separated from the refrigerant as it is discharged into the discharge chamber. The fixed vortex component has a fixed base plate and a fixed vortex wall extending from the fixed base plate. The fixing substrate has a first annular end face that extends along the outer periphery of the fixing substrate. The housing has a discharge housing component that, together with the fixed base plate, divides the discharge chamber and the oil storage chamber. The ejection shell component has a plate-shaped end wall and a cylindrical peripheral wall, the peripheral wall extending cylindrically from the outer periphery of the end wall and surrounding the fixed vortex member. The end wall has a second annular end face configured to be mated relative to the fixed substrate. The discharge chamber and the oil storage chamber are defined by the discharge shell component and the fixed base plate on the inner side of the second annular end face. The oil passage is located between the second annular end face and the fixed base plate, connecting the oil storage chamber to the outer peripheral space. The scroll compressor also includes a sealing gasket disposed between the second annular end face and the fixed base plate, which seals the outer peripheral space with the discharge chamber and the oil storage chamber. The oil passage includes a throttling groove disposed in the sealing gasket. The throttling groove is connected to the oil storage chamber. The oil passage includes a connecting passage that connects the throttling groove to the outer peripheral space. The connection path is disposed on the fixed substrate. The connection path is a groove disposed on the first annular end face. The first end of the connecting passage is connected to the end opposite to the end of the throttling groove that communicates with the oil storage chamber. The second end of the connection passage opens at the outer periphery of the fixed substrate.

2. The scroll compressor according to claim 1, The outer peripheral wall of the fixed scroll member has an intake port for drawing the refrigerant into the compression chamber. The outer peripheral space communicates with the compression chamber via the suction port. The oil passage is connected to the outer peripheral space in such a way that the opening of the oil passage communicating with the outer peripheral space is in the same phase position relative to the opening of the suction hole communicating with the outer peripheral space in the circumferential direction of the rotation axis.

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