Scroll Compressor

Abstract

To reliably guide lubricating oil contained in a mixed refrigerant to a bearing part, and reliably guide refrigerant gas contained in the mixed refrigerant to a compression part.SOLUTION: A scroll compressor 100 comprises a motor 30 for revolving a turning scroll 22 with respect to a fixed scroll 21, a rotating shaft 40 to be rotated around an axis X by the motor 30, a bearing part 50 supporting the rotating shaft 40, and a housing 10. The housing 10 comprises a partition wall part 16 partitioning an internal space IS into a first space IS1 in which the motor 30 is arranged, and a second space IS2 in which the bearing part 50 and a compression part 20 are arranged. The partition wall part 16 comprises a first communication passage 16c for guiding a mixed refrigerant containing lubricating oil and refrigerant gas, from the first space IS1 to a region of the second space IS2 in which the bearing part 50 is arranged, and a second communication passage 16d for guiding the refrigerant gas contained in the mixed refrigerant guided to the region of the second space IS2, to the compression part 20.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to scroll compressors. [Background technology]

[0002] Conventionally, scroll compressors having a fixed scroll and an orbiting scroll meshed with the fixed scroll have been known (see, for example, Patent Document 1). In Patent Document 1, the compressor-side housing and the electric motor-side housing are separated from each other by fixing them with a partition member sandwiched between them. The partition member is provided with a plurality of intake ports that connect the chambers on both sides.

[0003] The refrigerant gas flows through the motor housing, cooling the motor, before flowing into the compressor housing through the intake port in the partition member. The refrigerant gas that flows into the compressor housing is sucked into the variable volume chamber between the fixed scroll and the orbiting scroll, where it is compressed and discharged at high pressure from the end of the compressor housing. In the scroll compressor of Patent Document 1, the refrigerant gas contains oil, and the oil becomes a mist that floats inside the housing and lubricates various parts inside the housing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-174453 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in Patent Document 1, the refrigerant gas introduced into the multiple intake ports formed in the partition member is drawn into the variable volume chamber between the fixed scroll and the orbiting scroll without passing through areas where the main bearing supporting the main shaft connected to the rotating shaft of the motor and the drive bearing attached to the back surface of the orbiting scroll are located. As a result, the oil contained in the refrigerant gas cannot be efficiently supplied to lubricate the main bearing and drive bearing.

[0006] The present disclosure has been made in consideration of the above circumstances, and aims to provide a scroll compressor that can reliably guide lubricating oil contained in a mixed refrigerant to a bearing section and reliably guide refrigerant gas contained in the mixed refrigerant to a compression section. [Means for solving the problem]

[0007] A scroll compressor according to one embodiment of the present disclosure comprises a compression unit having a fixed scroll and a rotating scroll meshed with the fixed scroll, a motor causing the rotating scroll to revolve relative to the fixed scroll, a rotating shaft that rotates about an axis by the motor and is attached to the orbiting scroll via an eccentric shaft that is positioned eccentrically from the axis, a bearing that supports the rotating shaft, and a housing that is cylindrically formed along the axis and has an internal space that accommodates the motor and the compression unit, the housing having a partition wall that divides the internal space into a first space in which the motor is disposed and a second space in which the bearing wall and the compression unit are disposed, the partition wall having a first communication passage that guides a mixed refrigerant containing lubricating oil and refrigerant gas from the first space to a region of the second space where the bearing wall is disposed, and a second communication passage that guides the refrigerant gas contained in the mixed refrigerant that has been guided to the region of the second space to the compression unit. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide a scroll compressor that can reliably guide lubricating oil contained in a mixed refrigerant to a bearing section and reliably guide refrigerant gas contained in the mixed refrigerant to a compression section. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a vertical cross-sectional view showing a schematic configuration of a scroll compressor according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a view of the housing of the scroll compressor shown in FIG. 1, viewed from the compression section side. [Figure 3] FIG. 2 is a plan view of the thrust plate shown in FIG. [Figure 4] 3 is a view showing a state in which a thrust plate is attached to the housing shown in FIG. 2. FIG. [Figure 5] 5 is a view showing a state in which a compression section is attached to the housing shown in FIG. 4. FIG. [Figure 6] FIG. 10 is a view of a housing of a scroll compressor according to a modified example, viewed from the compression unit side. DETAILED DESCRIPTION OF THE INVENTION

[0010] A scroll compressor according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 5. FIG. 1 is a longitudinal sectional view showing a schematic configuration of a scroll compressor according to this embodiment. A scroll compressor 100 of this embodiment is used, for example, in a vehicle air conditioner. FIG. 2 is a view of the housing of the scroll compressor shown in FIG. 1 as seen from the compression section side. FIG. 1 is a sectional view of the scroll compressor 100 shown in FIG. 2 taken along the line AA. In FIG. 2, a rotational direction RD indicates the rotational direction of a rotary shaft 40.

[0011] As shown in FIG. 1, the scroll compressor 100 includes a housing 10, a compression unit 20, a motor 30, a rotating shaft 40, a bearing unit 50, a bearing unit 60, a balance weight 70, and an inverter 80.

[0012] The housing 10 forms the outer shell of the scroll compressor 100 and is made of an aluminum alloy. The housing 10 has a first housing 11, a second housing 12, and a third housing 13. The first housing 11, the second housing 12, and the third housing 13 are configured to be fastened together with bolts 14. As shown in FIG. 2, the housing 10 is fixed to a casing 200 via legs 15 with the axis X aligned horizontally.

[0013] As shown in Fig. 1, a suction port P1 is provided in the housing 10 on the upper side in the vertical direction (gravity direction) VD. Refrigerant supplied from the outside is introduced into the internal space IS of the housing 10 through the suction port P1. The refrigerant introduced into the housing 10 passes through the motor 30 along the axis X and is guided toward the compression section 20. The refrigerant drawn into the suction port P1 is a mixed refrigerant containing lubricating oil and refrigerant gas.

[0014] The first housing 11 is formed in a substantially cylindrical shape along the axis X, and has an internal space IS that houses the compression unit 20 and the motor 30. The second housing 12 seals one end of the first housing 11 along the axis X, and is provided with a discharge port (not shown) for the refrigerant gas compressed by the compression unit 20. The third housing 13 seals the other end of the first housing 11 along the axis X, and is provided with a space that houses the inverter 80 inside.

[0015] The housing 10 has a partition wall 16 that divides the internal space IS into a first space IS1 in which the motor 30 is disposed and a second space IS2 in which the bearing unit 50 and the compression unit 20 are disposed. The partition wall 16 has a bearing support unit 16a and a thrust plate 16b that are formed integrally with the first housing 11. The partition wall 16 will be described in detail later.

[0016] The compression unit 20 is a device disposed inside the first housing 11 and rotates about the axis X to compress the refrigerant gas. The compression unit 20 has a fixed scroll 21 fixed to the second housing 12 and an orbiting scroll 22 meshed with the fixed scroll 21. The compression unit 20 compresses the refrigerant gas by causing the orbiting scroll 22 to revolve and orbit relative to the fixed scroll 21 by the driving force of the motor 30.

[0017] The motor 30 is a device that causes the orbiting scroll 22 of the compression section 20 to revolve around the axis X relative to the fixed scroll 21. The motor 30 has a stator 31 and a rotor 32. The rotor 32 is connected to a rotary shaft 40.

[0018] The rotating shaft 40 is a shaft-shaped member that is rotated around the axis X by the motor 30. One end of the rotating shaft 40 is supported by a bearing 60 fixed to the third housing 13. The other end of the rotating shaft 40 is supported by a bearing 50 fixed to the bearing support 16a. An eccentric shaft 41 that is disposed eccentrically with respect to the axis X is provided at the end of the rotating shaft 40 on the compression section 20 side.

[0019] The eccentric shaft 41 is rotatably attached to a bearing portion 22b fixed to the back surface of the orbiting scroll 22 via a balance weight 70. In this manner, the rotating shaft 40 is attached to the orbiting scroll 22 via the eccentric shaft 41.

[0020] The bearing portion 50 is a member that is press-fitted into the bearing support portion 16a and supports the rotary shaft 40 rotatably around the X-axis. The bearing portion 60 is a member that is press-fitted into the third housing 13 and supports the rotary shaft 40 rotatably about the X-axis.

[0021] The balance weight 70 is a member that is fixed to the eccentric shaft 41 of the rotary shaft 40 and rotates around the axis X. The balance weight 70 cancels out vibrations caused by the orbital motion of the orbiting scroll 22.

[0022] The inverter 80 is a device that generates a drive voltage for driving the motor 30 and controls the rotation speed of the motor 30 .

[0023] Next, the partition wall 16 will be described in detail. Bearing support portion 16a is a member that divides internal space IS into a first space IS1 and a second space IS2, and into which bearing portion 50 is press-fitted. As shown in Fig. 2, two through holes 16a1, two through holes 16a2, and two through holes 16a3 are formed in the surface of bearing support portion 16a facing thrust plate 16b. Through holes 16a1, 16a2, and 16a3 each communicate between the surface of bearing support portion 16a facing motor 30 and the surface of compression portion 20.

[0024] As shown in FIG. 2, grooves 16a4 communicating with the through-hole 16a1 and the second space IS2 are formed on the surface of the bearing support portion 16a facing the thrust plate 16b. The grooves 16a4 are formed in two locations and extend in a radial direction perpendicular to the axis X. The grooves 16a4 guide the mixed refrigerant guided from the through-hole 16a1 along the radial direction to the region of the second space IS2 where the bearing portion 50 is disposed. In FIG. 2, the grooves 16a4 are indicated by hatching. The same applies to grooves 16a5, which will be described later. Also in FIGS. 4 and 6, the grooves 16a5 are indicated by hatching.

[0025] 2, a groove 16a5 communicating with the second space IS2 is formed in the surface of the bearing support 16a facing the thrust plate 16b. The groove 16a5 is formed at one location at the upper end of the bearing support 16a in the vertical direction VD so as to extend in a radial direction perpendicular to the axis X. The width of an inlet region (inner peripheral region) of the groove 16a5 in the rotational direction RD (circumferential direction about the axis X) is W1. The width of an outlet region (outer peripheral region) of the groove 16a5 in the rotational direction RD is W2, which is wider than W1.

[0026] The thrust plate 16b is a plate-shaped member that is attached to the bearing support portion 16a and supports the orbiting scroll 22 by means of a sliding surface 16bA that contacts the end face 22a of the orbiting scroll 22 of the compression portion 20. FIG. 3 is a plan view of the thrust plate 16b shown in FIG. 1. As shown in FIG. 3, the thrust plate 16b has a notch 16b1 formed in a position corresponding to the groove 16a5 formed in the bearing support portion 16a. The notch 16b1 is shaped to block the inlet region of the groove 16a5 while avoiding blocking the outlet region of the groove 16a5.

[0027] The width of the notch 16b1 in the rotational direction RD is W3. In the rotational direction RD, the width W1 of the entrance region of the groove 16a5 of the bearing support portion 16a is narrower than the width W3 of the notch 16b1. The width W3 of the notch 16b1 is approximately the same as the width W2 of the exit region of the groove 16a5 of the bearing support portion 16a.

[0028] The thrust plate 16b has a notch 16b2 formed in a position corresponding to the through hole 16a2 formed in the bearing support portion 16a. The notch 16b2 is shaped to avoid blocking the area overlapping with the through hole 16a2. In the rotation direction RD, the width of the notch 16b2 is approximately the same as the width of the through hole 16a2 in the bearing support portion 16a.

[0029] The thrust plate 16b has a notch 16b3 formed in a position corresponding to the through hole 16a3 formed in the bearing support portion 16a. The notch 16b3 is shaped to avoid blocking the area overlapping with the through hole 16a3. In the rotation direction RD, the width of the notch 16b3 is approximately the same as the width of the through hole 16a3 of the bearing support portion 16a.

[0030] Fig. 4 is a diagram showing a state in which thrust plate 16b is attached to housing 10 shown in Fig. 2. As shown in Fig. 4, through-hole 16a1, groove 16a4, and groove 16a5 formed in bearing support portion 16a are covered by opposing surface 16bB (see Fig. 1) of thrust plate 16b. Opposing surface 16bB is the surface that faces the surface of bearing support portion 16a on the thrust plate 16b side.

[0031] The mixed refrigerant guided from first space IS1 to through hole 16a1 collides with opposing surface 16bB of thrust plate 16b and is guided to groove 16a4 communicating with through hole 16a1. The mixed refrigerant guided to groove 16a4 is guided toward axis X in a radial direction perpendicular to axis X. The region to which the mixed refrigerant is guided is the region of second space IS2 where bearing 50 is disposed.

[0032] Thus, the partition wall 16, which is formed by the bearing support portion 16a and the thrust plate 16b, has a first communication passage 16c (see FIG. 1) that guides a mixed refrigerant containing lubricating oil and refrigerant gas from the first space IS1 to the region of the second space IS2 where the bearing portion 50 is located. The first communication passage 16c is formed by the through hole 16a1, the groove portion 16a4, and the opposing surface 16bB of the thrust plate 16b.

[0033] The mixed refrigerant guided to the region of the second space IS2 where the bearing unit 50 is disposed flows along the rotation direction RD, flows into the inlet region of the groove 16a5 of the bearing support unit 16a, and is guided to the outlet region. The refrigerant gas guided to the outlet region of the groove 16a5 is guided via the cutout 16b1 to the region of the second space IS2 where the compression unit 20 is disposed.

[0034] Thus, the partition wall portion 16 has a second communication passage 16d (see FIG. 1) that guides the refrigerant gas contained in the mixed refrigerant guided to the region of the second space IS2 where the bearing portion 50 is disposed, to the compression portion 20. The second communication passage 16d is formed by the groove portion 16a5, the opposing surface 16bB of the thrust plate 16b, and the notch portion 16b1.

[0035] The mixed refrigerant guided from the first space IS1 to the through hole 16a2 is guided from the first space IS1 to the suction position P3 of the compression section 20 in the second space IS2 without passing through the area where the bearing section 50 is disposed. This is because the notch 16b2 is formed in the thrust plate 16b at a position corresponding to the through hole 16a2. The suction position P3 is the end (winding end) of the fixed scroll 21. The suction position P3 is also the end (winding end) of the orbiting scroll 22.

[0036] Thus, the partition wall portion 16 has the third communication passage 16e that guides the refrigerant gas from the first space IS1 to the compression section 20 in the second space IS2 without passing through the region where the bearing portion 50 is disposed. The third communication passage 16e guides the refrigerant gas to the suction position P3 where the end of the fixed scroll 21 or the end of the orbiting scroll 22 is disposed.

[0037] The mixed refrigerant guided from the first space IS1 to the through hole 16a3 is guided from the first space IS1 to the compression section 20 in the second space IS2 without passing through the region where the bearing section 50 is disposed. This is because the notch 16b3 is formed in the thrust plate 16b at a position corresponding to the through hole 16a3.

[0038] The thrust plate 16b is formed with a notch (oil return portion) 16b5 that returns lubricating oil (not shown) remaining below in the vertical direction VD of the housing 10 from the sliding surface 16bA side to the opposing surface 16bB side. As shown in Fig. 4, the second communication passage 16d is formed on the opposite side of the notch 16b5 with respect to the axis X. The second communication passage 16d is formed at a position separated from the notch 16b5 in the circumferential direction about the axis X by an angle ranging from 90 degrees to 270 degrees. By forming the second communication passage 16d on the opposite side of the notch 16b5 with respect to the axis X, it is possible to prevent lubricating oil from being introduced into the second communication passage 16d.

[0039] 4, first communication passages 16c are arranged at two locations, one approximately 135 degrees away from the position where second communication passage 16d is arranged in the opposite direction of rotation RD, and the other approximately 315 degrees away. In this case, the position where first communication passage 16c is arranged and the position where second communication passage 16d is arranged are separated by more than 135 degrees in the direction of rotation RD.

[0040] The example shown in Fig. 4 may be modified to other variations. For example, the position where the first communication passage 16c is disposed and the position where the second communication passage 16d is disposed may be separated by 180 degrees or more in the direction of rotation RD. Fig. 6 is a view of the housing 10 of a modified scroll compressor 100A as seen from the compression section 20 side. In Fig. 6, the first communication passage 16c is disposed at only one location, approximately 315 degrees away in the opposite direction of rotation RD from the position where the second communication passage 16d is disposed. In this case, the position where the first communication passage 16c is disposed and the position where the second communication passage 16d is disposed are separated by approximately 315 degrees in the direction of rotation RD.

[0041] The greater the distance in the direction of rotation RD between the position where first communication passage 16c is disposed and the position where second communication passage 16d is disposed, the more likely it is that the lubricating oil contained in the mixed refrigerant that is guided from first communication passage 16c to the region of second space IS2 where bearing 50 is disposed is guided to second communication passage 16d. This is because the longer the length in the direction of rotation RD from first communication passage 16c to second communication passage 16d, the more likely it is that the lubricating oil will separate from the refrigerant gas.

[0042] 6, first communication passage 16c is disposed at only one position, approximately 315 degrees away in the opposite direction of rotation RD from the position where second communication passage 16d is disposed, but various modifications are possible. For example, first communication passage 16c and second communication passage 16d may be disposed at other positions as long as they are separated by 180 degrees or more in the direction of rotation RD.

[0043] The operation and effects of the scroll compressor 100 of the present embodiment described above will be described. In the scroll compressor 100 of this embodiment, the motor 30 rotates the rotary shaft 40 about the axis X, and the orbiting scroll 22, to which the rotary shaft 40 is attached via the eccentric shaft 41, revolves around the fixed scroll 21, compressing and discharging the refrigerant gas. The internal space IS of the housing 10, which accommodates the motor 30 and the compression unit 20, is partitioned by the partition wall 16 into a first space IS1 in which the motor 30 is disposed and a second space IS2 in which the bearing unit 50 and the compression unit 20 are disposed.

[0044] The first communication passage 16c of the partition wall portion 16 guides the mixed refrigerant containing lubricating oil and refrigerant gas from the first space IS1 to the region of the second space IS2 where the bearing portion 50 is disposed. The second communication passage 16d guides the refrigerant gas contained in the mixed refrigerant guided to the region of the second space IS2 where the bearing portion 50 is disposed to the compression portion 20. As described above, the scroll compressor 100 of this embodiment can reliably guide the lubricating oil contained in the mixed refrigerant to the bearing portion 50 and reliably guide the refrigerant gas contained in the mixed refrigerant to the compression portion 20.

[0045] According to the scroll compressor 100 of this embodiment, the mixed refrigerant supplied from the suction port P1 to the first space IS1 can be guided through the through hole 16a1 to the groove portion 16a4, passed between the groove portion 16a4 and the opposing surface 16bB of the thrust plate 16b, and guided to the region of the second space IS2 where the bearing portion 50 is located.

[0046] According to the scroll compressor 100 of this embodiment, the refrigerant gas contained in the mixed refrigerant supplied to the second space IS2 can pass between the groove portion 16a5 and the opposing surface 16bB of the thrust plate 16b and be guided to the compression section 20 through the cutout portion 16b1.

[0047] According to the scroll compressor 100 of this embodiment, the third communication passage 16e guides the refrigerant gas from the first space IS1 to the suction position P3 of the compression section 20 in the second space IS2 without passing through the region in which the bearing 50 is disposed. Therefore, the refrigerant gas can be guided directly to the suction position P3 of the compression section 20 without heat loss caused by the refrigerant gas passing through the bearing 50 and being heated.

[0048] According to the scroll compressor 100 of this embodiment, the second communication passage 16d is formed on the opposite side of the position where the notch 16b5 is formed with respect to the axis X. Therefore, it is possible to appropriately prevent the lubricating oil from being introduced into the second communication passage 16d.

[0049] According to the scroll compressor 100 of this embodiment, the width W1 of the groove portion 16a5 is narrower than the width W3 of the notch portion 16b1, and therefore, compared to when the width of the groove portion 16a5 is the same as the width of the notch portion 16b1, it is possible to prevent the lubricating oil contained in the mixed refrigerant from being guided from the notch portion 16b1 to the compression section 20.

[0050] According to the scroll compressor 100 of this embodiment, the position where the first communication passage 16c is disposed and the position where the second communication passage 16d is disposed are separated by 180 degrees or more, so that the lubricating oil that has flowed from the first communication passage 16c into the second space IS2 can be moved by 180 degrees or more in the rotational direction RD. Therefore, the amount of lubricating oil that remains around the bearing portion 50 can be increased compared to when the angle between the position where the first communication passage 16c is disposed and the position where the second communication passage 16d is disposed is less than 180 degrees.

[0051] The scroll compressor according to the present embodiment described above can be understood, for example, as follows. A scroll compressor (100) according to the present disclosure includes a compression section (20) having a fixed scroll (21) and an orbiting scroll (22) meshed with the fixed scroll, a motor (30) that causes the orbiting scroll to revolve around the fixed scroll, a rotating shaft (40) that rotates around an axis (X) by the motor and is attached to the orbiting scroll via an eccentric shaft (41) that is disposed eccentrically from the axis, a bearing section (50) that supports the rotating shaft, and a bearing (50) that is cylindrically formed along the axis and that connects the motor and the compression section. and a housing (10) having an internal space (IS) for accommodating therein the motor, wherein the housing has a partition wall portion (16) that divides the internal space (IS) into a first space (IS1) in which the motor is disposed and a second space (S2) in which the bearing portion and the compression portion are disposed, and the partition wall portion has a first communication passage (16c) that guides a mixed refrigerant containing lubricating oil and refrigerant gas from the first space to a region of the second space in which the bearing portion is disposed, and a second communication passage (16d) that guides the refrigerant gas contained in the mixed refrigerant that has been guided to the region of the second space to the compression portion.

[0052] In the scroll compressor according to the present disclosure, a motor rotates a rotary shaft about its axis, and an orbiting scroll, to which the rotary shaft is attached via an eccentric shaft, revolves orbitally relative to a fixed scroll, compressing and discharging refrigerant gas. The internal space of the housing that accommodates the motor and the compression unit is partitioned by a partition into a first space in which the motor is disposed and a second space in which the bearing unit and the compression unit are disposed.

[0053] The first communication passage in the partition guides a mixed refrigerant containing lubricating oil and refrigerant gas from the first space to the region of the second space where the bearing is located. The second communication passage guides the refrigerant gas contained in the mixed refrigerant guided to the region of the second space where the bearing is located to the compression section. In this way, the scroll compressor according to the present disclosure can reliably guide the lubricating oil contained in the mixed refrigerant to the bearing and the refrigerant gas contained in the mixed refrigerant to the compression section.

[0054] In the scroll compressor according to the present disclosure, the partition wall portion may include a bearing support portion (16a) that divides the internal space into the first space and the second space and into which the bearing portion is press-fitted, and a plate-shaped thrust plate (16b) that is attached to the bearing support portion and supports the orbiting scroll with a sliding surface that contacts an end face of the orbiting scroll, and the first communicating passage (16c) may be formed by a through hole (16a1) formed in the bearing support portion, a first groove portion (16a4) that is formed in a surface of the bearing support portion facing the thrust plate and that communicates with the through hole and the second space, and an opposing surface (16bB) of the thrust plate facing the bearing support portion and that is arranged to cover the first groove portion.

[0055] According to the scroll compressor of this configuration, the mixed refrigerant supplied to the first space can be guided through the through hole to the first groove portion, passed between the first groove portion and the opposing surface of the thrust plate, and guided to the area of ​​the second space where the bearing portion is located.

[0056] In the scroll compressor according to the present disclosure, the second communication passage (16d) may be configured to be formed by a second groove portion (16a5) formed in the surface of the bearing support portion facing the thrust plate, an opposing surface of the thrust plate facing the bearing support portion and arranged to cover the second groove portion, and a notch portion formed in the thrust plate for guiding the refrigerant gas from the second groove portion to the compression portion.

[0057] According to the scroll compressor having this configuration, the refrigerant gas contained in the mixed refrigerant supplied to the second space can pass between the second groove portion and the opposing surface of the thrust plate and be guided to the compression portion through the cutout portion.

[0058] In the scroll compressor according to the present disclosure, the partition wall may include a bearing support portion that divides the internal space into the first space and the second space and into which the bearing portion is press-fitted, and a plate-shaped thrust plate that is attached to the bearing support portion and supports the orbiting scroll with a sliding surface that contacts an end face of the orbiting scroll, and the second communication passage may be formed by a second groove portion that is formed in a surface of the bearing support portion that faces the thrust plate, an opposing surface of the thrust plate that faces the bearing support portion and is arranged to cover the second groove portion, and a notch that is formed in the thrust plate and that guides the refrigerant gas from the second groove portion to the compression portion.

[0059] According to the scroll compressor having this configuration, the refrigerant gas contained in the mixed refrigerant supplied to the second space can pass between the second groove portion and the opposing surface of the thrust plate and be guided to the compression portion through the cutout portion.

[0060] In the scroll compressor according to the present disclosure, the partition wall portion may have a third communication passage (16e) that guides the refrigerant gas from the first space to the compression portion of the second space without passing through the region where the bearing portion is located, and the third communication passage may be configured to guide the refrigerant gas to an intake position (P3) where an end of the fixed scroll or an end of the orbiting scroll is located.

[0061] In the scroll compressor having this configuration, the third communication passage guides the refrigerant gas from the first space to the suction position of the compression section in the second space without passing through the area where the bearing is located, so that the refrigerant gas can be guided directly to the suction position of the compression section without heat loss caused by the refrigerant gas passing through the bearing and being heated.

[0062] In the scroll compressor of the present disclosure, the thrust plate may be formed with an oil return section (16b5) that returns the lubricating oil accumulating below the housing from the sliding surface side to the opposing surface side, and the second communication passage may be formed on the opposite side of the axis from the position where the oil return section is formed. In the scroll compressor having this configuration, the second communication passage is formed on the opposite side of the axis from the position where the oil return section is formed, thereby making it possible to appropriately prevent lubricating oil from being introduced into the second communication passage.

[0063] In the scroll compressor according to the present disclosure, the width of the second groove portion may be narrower than the width of the notch portion in the rotation direction of the rotary shaft. In the scroll compressor of this configuration, the width of the second groove portion is narrower than the width of the notch portion, and therefore, compared to when the width of the second groove portion is the same as the width of the notch portion, it is possible to prevent the lubricating oil contained in the mixed refrigerant from being guided from the notch portion to the compression section.

[0064] In the scroll compressor according to the present disclosure, the position where the first communication passage is disposed and the position where the second communication passage is disposed may be separated by 180 degrees or more in the rotation direction of the rotary shaft. In the scroll compressor having this configuration, the position where the first communication passage is disposed and the position where the second communication passage is disposed are separated by 180 degrees or more, so that the lubricating oil that flows from the first communication passage into the second space can move by 180 degrees or more in the rotational direction. Therefore, the amount of lubricating oil that accumulates around the bearing can be increased compared to when the angle between the positions where the first communication passage is disposed and the positions where the second communication passage is disposed is less than 180 degrees. [Explanation of symbols]

[0065] 10. Housing 11 First Housing 12 Second Housing 13 Third Housing 14 volts 15 Legs 16 Bulkhead 16a Bearing support part 16a1,16a2,16a3 through hole 16a4,16a5 Groove 16b Thrust plate 16b1, 16b2, 16b3, 16b5 Notch 16bA sliding surface 16bB Opposite side 16c 1st communication passage 16d 2nd communication passage 16e 3rd passageway 20 Compression section 21 Fixed Scroll 22 Swivel Scroll 22a End face 22b Bearing section 30 motor 40 Rotational Axis 41 Eccentric shaft 50,60 Bearing part 70 balance weight 80 inverter 100,100A scroll compressor IS interior space IS1 1st space IS2 2nd space P1 Intake port P3 suction position RD rotation direction VD vertical direction X axis

Claims

1. a compression section having a fixed scroll and an orbiting scroll meshed with the fixed scroll; a motor that causes the orbiting scroll to revolve relative to the fixed scroll; a rotating shaft that is rotated about an axis by the motor and is attached to the orbiting scroll via an eccentric shaft that is disposed eccentrically from the axis; a bearing portion that supports the rotating shaft; a housing formed in a cylindrical shape along the axis and having an internal space for accommodating the motor and the compression unit, the housing has a partition wall that divides the internal space into a first space in which the motor is disposed and a second space in which the bearing portion and the compression portion are disposed, the partition wall portion includes a first communication passage that guides a mixed refrigerant containing lubricating oil and refrigerant gas from the first space to a region of the second space where the bearing portion is disposed, and a second communication passage that guides the refrigerant gas contained in the mixed refrigerant that has been guided to the region of the second space to the compression portion.

2. The partition wall portion is a bearing support portion that divides the internal space into the first space and the second space and into which the bearing portion is press-fitted; a plate-shaped thrust plate attached to the bearing support portion and supporting the orbiting scroll by a sliding surface that contacts an end face of the orbiting scroll, 2. The scroll compressor according to claim 1, wherein the first communication passage is defined by a through hole formed in the bearing support portion, a first groove formed in a surface of the bearing support portion facing the thrust plate and communicating with the through hole and the second space, and an opposing surface of the thrust plate facing the bearing support portion and arranged to cover the first groove.

3. 3. The scroll compressor according to claim 2, wherein the second communication passage is formed by a second groove formed in a surface of the bearing support portion facing the thrust plate, an opposing surface of the thrust plate facing the bearing support portion and disposed so as to cover the second groove, and a notch formed in the thrust plate that guides the refrigerant gas from the second groove to the compression portion.

4. The partition wall portion is a bearing support portion that divides the internal space into the first space and the second space and into which the bearing portion is press-fitted; a plate-shaped thrust plate attached to the bearing support portion and supporting the orbiting scroll by a sliding surface that contacts an end face of the orbiting scroll, 2. The scroll compressor according to claim 1, wherein the second communication passage is formed by a second groove formed in a surface of the bearing support portion facing the thrust plate, an opposing surface of the thrust plate facing the bearing support portion and arranged to cover the second groove, and a notch formed in the thrust plate that guides the refrigerant gas from the second groove to the compression portion.

5. the partition wall portion has a third communication passage that guides the refrigerant gas from the first space to the compression section of the second space without passing through the region in which the bearing portion is disposed, The scroll compressor according to claim 1 , wherein the third communication passage guides the refrigerant gas to a suction position where an end of the fixed scroll or an end of the orbiting scroll is disposed.

6. an oil return portion is formed in the thrust plate to return the lubricating oil remaining below the housing from the sliding surface side to the opposing surface side, The scroll compressor according to claim 3 , wherein the second communication passage is formed on the opposite side of the axis from the position where the oil return portion is formed.

7. 5. The scroll compressor according to claim 3, wherein a width of an inlet region of the second groove portion is narrower than a width of the notch portion in the rotation direction of the rotary shaft.

8. 8. The scroll compressor according to claim 1, wherein a position where the first communication passage is disposed and a position where the second communication passage is disposed are separated by 180 degrees or more in a rotation direction of the rotary shaft.

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