Double rotary scroll compressor

Abstract

In a compressor, a compression mechanism (9) has a driving scroll (30) and a driven scroll (40) that form a compression chamber (12). An exhaust communication port (69) that discharges compressed refrigerant, which is refrigerant compressed in the compression chamber (12), to the outside is formed in a housing (6). In addition, a casing (39) that is able to rotate together with the driving mechanism (9) is provided in the housing (6). An exhaust chamber (14) is formed in the casing (39). The casing (39) has a wall portion (39b). An exhaust passage (390) and guide protrusions (71 to 76) are provided in the wall portion (39b). The guide protrusions (71 to 76) separate lubricating oil (18) included in the compressed refrigerant from the compressed refrigerant by colliding with the compressed refrigerant, and guide the compressed refrigerant and the lubricating oil (18) toward the radially outer side of the exhaust passage (390).

Description

Technical Field

[0001] This invention relates to a dual rotary scroll compressor. Background Technology

[0002] Patent Document 1 discloses a conventional dual-rotary scroll compressor (hereinafter referred to as the compressor). This compressor includes a housing, a drive mechanism, a drive scroll member, a driven scroll member, and a driven mechanism. The drive mechanism and the drive scroll member are housed within the housing. Furthermore, a protrusion is formed on the housing, protruding toward the drive scroll member. A support hole and a discharge port are formed inside the protrusion. The support hole has a diameter larger than the diameter of the discharge port and communicates with the discharge port. The discharge port communicates with the outside of the housing.

[0003] A drive shaft is formed in the drive scroll member. The drive shaft is cylindrical and houses the protrusion inside. A bearing is provided between the drive shaft and the protrusion, more specifically, between the inner circumferential surface of the drive shaft and the outer circumferential surface of the protrusion. The outer circumferential surface of the drive shaft is fixed to the drive mechanism. In this way, the drive scroll member is fixed to the drive mechanism within the housing and supported by the protrusion via the bearing in a manner that allows it to rotate about the drive shaft.

[0004] The driven scroll member is housed within the housing. More specifically, the driven scroll member is housed within the driving scroll member, thereby being housed within the housing. Furthermore, by being housed within the driving scroll member, a compression chamber is formed between the driven scroll member and the driving scroll member. Additionally, a driven shaft protruding towards the protrusion is formed in the driven scroll member. The driven shaft passes through a support hole. Thus, the driven scroll member, while housed within the driving scroll member, is supported on the protrusion in a manner capable of rotating about the driven shaft. Furthermore, a discharge chamber is formed inside the driven shaft. The discharge chamber communicates not only with the compression chamber but also with a discharge port. That is, the compression chamber and the discharge port are connected through the discharge chamber. A driven mechanism is disposed between the driving scroll member and the driven scroll member.

[0005] In this compressor, a drive scroll is driven to rotate around a drive shaft via a drive mechanism, while a driven scroll rotates around a driven shaft via the drive scroll and the driven mechanism. Thus, the volume of the compression chamber changes due to the driving scroll and the driven scroll. Consequently, in this compressor, refrigerant is drawn into the compression chamber and compressed within it. The compressed refrigerant is then discharged as compressed refrigerant into the discharge chamber, and subsequently discharged from the discharge chamber to the outside of the casing via the discharge port.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2-227575 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] In addition, the refrigerant drawn into the compression chamber contains lubricating oil, which is discharged from the compression chamber to the discharge chamber along with the compressed refrigerant. Therefore, such lubricating oil can be considered for lubricating the driving and driven scroll components.

[0011] However, in the aforementioned conventional compressors, most of the lubricating oil discharged into the discharge chamber is discharged along with the compressed refrigerant from the discharge chamber to the outside of the casing via the discharge port. Therefore, in such compressors, the lubricating oil discharged into the discharge chamber cannot be adequately used for lubricating the driving and driven scroll components. Consequently, in such compressors, there is a concern about reduced durability due to insufficient lubrication of the driving and driven scroll components.

[0012] The present invention was made in view of the above-mentioned prior conditions, and the problem to be solved is to provide a dual rotary scroll compressor with excellent durability.

[0013] Methods for solving problems

[0014] The dual-rotary scroll compressor of the present invention comprises a housing, a compression mechanism, a drive mechanism, and a driven mechanism.

[0015] The compression mechanism, the drive mechanism, and the driven mechanism are housed within the housing.

[0016] The compression mechanism includes: a driving scroll member that is driven to rotate about a driving axis via the driving mechanism; and a driven scroll member that is eccentric relative to the driving scroll member and is driven to rotate about a driven axis via the driving scroll member and the driven mechanism.

[0017] The driving scroll member and the driven scroll member form a compression chamber that compresses the refrigerant through the driving rotation and the driven rotation.

[0018] Its features are,

[0019] A discharge port is formed in the outer casing, through which the compressed refrigerant, i.e., the compressed refrigerant, is discharged to the outside after being compressed in the compression chamber.

[0020] A housing capable of rotating together with the drive mechanism is provided inside the outer casing.

[0021] A discharge chamber is formed within the housing, and the discharge chamber communicates with the compression chamber, through which the compressed refrigerant is discharged.

[0022] The housing has a wall extending radially along the housing.

[0023] The wall portion is provided with a discharge passage and a guide protrusion.

[0024] The discharge passage connects the discharge chamber to the discharge port.

[0025] The guide protrusion protrudes into the discharge chamber and, by colliding with the compressed refrigerant, separates the lubricating oil contained in the compressed refrigerant from the compressed refrigerant, and guides the compressed refrigerant and the lubricating oil toward a radially outer direction than the discharge passage.

[0026] In the dual-rotary scroll compressor of the present invention, a housing is provided inside the outer casing, and this housing is rotatable together with the drive mechanism. Furthermore, a discharge chamber is formed within the housing. This discharge chamber communicates with the compression chamber, and compressed refrigerant is discharged into the discharge chamber.

[0027] Furthermore, in this compressor, a discharge passage and a guide protrusion are provided on the wall of the housing. The guide protrusion protrudes into the discharge chamber. In this compressor, the guide protrusion collides with the compressed refrigerant in the discharge chamber, thereby separating the lubricating oil contained in the compressed refrigerant from the compressed refrigerant. Moreover, the guide protrusion guides the compressed refrigerant and lubricating oil radially outward from the wall of the discharge passage.

[0028] Furthermore, in this compressor, the housing rotates together with the compression mechanism, and the centrifugal force of the rotating housing acts on the compressed refrigerant in the discharge chamber. Therefore, in this compressor, in addition to the collision with the guide protrusion, the centrifugal force of the housing acting on the compressed refrigerant can also be used to separate the lubricating oil from the compressed refrigerant. Thus, the lubricating oil separated from the compressed refrigerant also flows radially outward toward the wall due to centrifugal force.

[0029] Therefore, in this compressor, the compressed refrigerant after the lubricating oil has been separated is discharged from the discharge chamber to the outside of the housing via the discharge passage and the discharge port. On the other hand, the discharge of the lubricating oil separated from the compressed refrigerant to the outside of the housing via the discharge passage and the discharge port can be prevented. As a result, in this compressor, the lubricating oil separated from the compressed refrigerant can be easily used for lubrication of the driving scroll and driven scroll components.

[0030] Therefore, the dual rotary scroll compressor of the present invention has excellent durability.

[0031] In the compressor of the present invention, there may be multiple guide protrusions. Preferably, each guide protrusion is arranged circumferentially on the wall. In this case, due to the rotation of the housing, the multiple guide protrusions appropriately collide with the compressed refrigerant in the discharge chamber, thus enabling the lubricating oil contained in the compressed refrigerant to be appropriately separated from the compressed refrigerant. Furthermore, in this compressor, the lubricating oil and compressed refrigerant can be appropriately guided radially outward from the wall portion of the discharge passage by the guide protrusions, thus more effectively suppressing the discharge of lubricating oil to the outside of the housing via the discharge passage and discharge port.

[0032] Preferably, the guide protrusion has a curved portion that bends rearward toward the direction of rotation of the housing as it approaches the radially outer side. In this case, the lubricating oil and compressed refrigerant can be appropriately guided toward the radially outer side of the wall.

[0033] A support body can be formed in the wall portion, protruding toward the housing and rotatably supported on the housing via bearings. Preferably, a discharge passage extends within the support body. In this case, the housing can be appropriately rotated within the housing. Furthermore, by extending the discharge passage within the support body, a discharge passage can be appropriately formed.

[0034] Preferably, a collision wall is provided in the discharge chamber, which overlaps with the discharge passage in the direction of the drive shaft and collides with the compressed refrigerant. In this case, since the compressed refrigerant in the discharge chamber also collides with the collision wall, the lubricating oil contained in the compressed refrigerant can be more properly separated from the compressed refrigerant.

[0035] Alternatively, it is also preferable to have a cylindrical protrusion provided in the wall portion, which connects to the guide protrusion and protrudes cylindrically into the discharge chamber, forming a discharge passage inside. In this case, the lubricating oil separated from the compressed refrigerant is less likely to reach the discharge passage. Furthermore, in this compressor, the lubricating oil can be stored between the guide protrusion and the cylindrical protrusion. Therefore, in this compressor, the discharge of lubricating oil to the outside of the casing via the discharge passage and the discharge port can be more appropriately suppressed.

[0036] The compression mechanism may include a discharge port for discharging compressed refrigerant from the compression chamber to the discharge chamber, a discharge reed valve for opening and closing the discharge port, and a retainer for adjusting the opening degree of the discharge reed valve. Alternatively, the base end of the retainer may be fixed to the compression mechanism, and the retainer may extend away from the compression mechanism from the base end toward the top end. Preferably, the guide protrusion is located on the extension line of the top end of the retainer.

[0037] In this case, the shape of the retainer allows the compressed refrigerant discharged from the outlet into the discharge chamber to be properly guided toward the guide protrusion. This allows the compressed refrigerant to properly collide with the guide protrusion.

[0038] Preferably, the discharge chamber is connected to a return path that allows the lubricating oil in the discharge chamber to flow back to a location inside the housing where the pressure is lower than that in the discharge chamber. In this case, the lubricating oil separated from the compressed refrigerant can be appropriately used for lubrication of the driving and driven scroll components, etc.

[0039] Invention Effects

[0040] The dual-rotary scroll compressor of the present invention exhibits excellent durability. Attached Figure Description

[0041] Figure 1 This is a cross-sectional view of the compressor in Example 1.

[0042] Figure 2 The compressor relating to Embodiment 1 is shown in a rear view of the housing when viewed from the rear.

[0043] Figure 3 The compressor relating to Embodiment 1 shows the discharge chamber, guide protrusion, and impact plate, etc. Figure 1 Enlarged sectional view of the main part.

[0044] Figure 4 This is a cross-sectional view of the compressor in Example 2.

[0045] Figure 5 The compressor relating to Embodiment 2 is shown in a rear view of the housing when viewed from the rear. Detailed Implementation

[0046] Hereinafter, embodiments 1 and 2, which embody the present invention, will be described with reference to the accompanying drawings. The compressors of embodiments 1 and 2 are mounted in a vehicle (not shown) and constitute the vehicle's air conditioning system.

[0047] Example 1

[0048] like Figure 1 As shown, the compressor of Embodiment 1 includes a housing 6, an electric motor 10, a compression mechanism 9, and a casing 39. The electric motor 10 is an example of the "drive mechanism" in this invention.

[0049] In this embodiment, by Figure 1 The solid arrows shown define the compressor's forward / backward and up / down directions. The forward / backward and up / down directions are orthogonal to each other. Furthermore, in Figure 2 Later, with Figure 1Correspondingly, the compressor's front-to-back and vertical directions are specified. Furthermore, these front-to-back directions, etc., are merely examples for illustrative purposes; the compressor can appropriately change its posture depending on the vehicle it is mounted on.

[0050] like Figure 1 As shown, the outer shell 6 is composed of an outer shell body 60, a first outer shell cover 61, and a second outer shell cover 62.

[0051] The main body 60 is made of aluminum alloy. The main body 60 is cylindrical with the drive shaft O1 as the center, and has openings at the front and rear ends. The drive shaft O1 is parallel to the front-to-back direction.

[0052] Additionally, a suction port 68 is formed in the outer casing 60. The suction port 68 extends radially along the outer casing 60. The suction port 68 is connected to the evaporator (not shown) via a pipe (not shown).

[0053] The first outer casing 61 is made of steel. The first outer casing 61 is located at the rear end of the outer casing body 60. The first outer casing 61 is generally disc-shaped with the drive shaft O1 as the center. The first outer casing 61 has a front surface 61a facing forward and a rear surface 61b located on the opposite side of the front surface 61a and facing rearward.

[0054] Additionally, a protrusion 64 is provided inside the outer casing 6. Specifically, the protrusion 64 is integrally formed on the first outer casing 61. Therefore, the protrusion 64 is also made of steel. The protrusion 64 protrudes forward in a cylindrical shape from the center of the front surface 61a in the direction of the drive shaft O1. The protrusion 64 has a first radial portion 64a and a second radial portion 64b.

[0055] The first diameter portion 64a constitutes the front portion of the protrusion 64. The first diameter portion 64a is formed with a diameter smaller than that of the insertion hole 375 described later. A pin hole 4 is formed in the first diameter portion 64a. The pin hole 4 extends along the drive shaft center O1 inside the first diameter portion 64a and opens at the front end face of the first diameter portion 64a.

[0056] Additionally, a first radial ball bearing 51 is provided on the outer peripheral surface of the first radial portion 64a. Alternatively, a sliding bearing may be provided on the outer peripheral surface of the first radial portion 64a instead of the first radial ball bearing 51.

[0057] The second diameter portion 64b is integral with the first diameter portion 64a and is located behind the first diameter portion 64a. Thus, the second diameter portion 64b constitutes the rear portion of the protrusion 64. Furthermore, the second diameter portion 64b connects to the front surface 61a of the first outer casing 61 at its rear end. Additionally, the second diameter portion 64b is formed with a diameter larger than that of the first diameter portion 64a.

[0058] The second housing cover 62 is disposed at the front of the housing body 60. The second housing cover 62 is made of aluminum alloy. The second housing cover 62 is generally disc-shaped with the drive shaft O1 as the center. The second housing cover 62 has a front surface 62a facing forward and a rear surface 62b located on the opposite side of the front surface 62a and facing backward.

[0059] Additionally, a support portion 66 and a discharge port 69 are formed on the second outer casing 62. The support portion 66 is integrally formed approximately at the center of the rear surface 62b and protrudes rearward from the rear surface 62b. The support portion 66 is formed in a cylindrical shape centered on the drive shaft O1, and a second radial ball bearing 52 and a shaft seal member 63 are disposed inside it. Alternatively, a sliding bearing may be disposed inside the support portion 66 instead of the second radial ball bearing 52.

[0060] The shaft seal member 63 is disposed within the support portion 66 at a position forward of the second radial ball bearing 52. The shaft seal member 63 is formed in annular shape.

[0061] The discharge port 69 penetrates the second housing 62 in the direction of the drive shaft O1 and communicates with the interior of the support 66. In addition, the discharge port 69 is connected to the condenser (not shown) via a pipe (not shown).

[0062] In the housing 6, the front surface 61a of the first housing cover 61 abuts against the rear end of the housing body 60, and the rear surface 62b of the second housing cover 62 abuts against the front end of the housing body 60. Furthermore, the housing body 60, the first housing cover 61, and the second housing cover 62 are fixed in the direction of the drive shaft O1 by a plurality of bolts (not shown).

[0063] In this way, within the outer casing 6, the outer casing body 60 is clamped in the front-to-back direction by the first outer casing cover 61 and the second outer casing cover 62, with the front and rear ends of the outer casing body 60 respectively blocked by the first outer casing cover 61 and the second outer casing cover 62. Consequently, a vortex chamber 65 is formed within the outer casing body 60. The vortex chamber 65 communicates with the suction port 68. Therefore, refrigerant is drawn into the vortex chamber 65 from the outside of the outer casing 6 through the suction port 68.

[0064] Furthermore, the aforementioned protrusion 64 protrudes from the first outer casing 61 into the vortex chamber 65 in the direction of the drive shaft O1. More specifically, the protrusion 64 protrudes forward from the first outer casing 61 toward the drive vortex member 30 and the driven vortex member 40.

[0065] The electric motor 10 is housed within the scroll chamber 65. Thus, the scroll chamber 65 also serves as the motor chamber for housing the electric motor 10.

[0066] The electric motor 10 consists of a stator 17 and a rotor 11. The stator 17 has a stator core 17a and a winding 17b. The stator core 17a is formed into a cylindrical shape centered on the drive shaft O1. The winding 17b is wound around the stator core 17a. Thus, the winding 17b forms a first coil end 171 and a second coil end 172.

[0067] The first coil end 171 protrudes forward in a cylindrical shape from the stator core 17a in the direction of the drive shaft O1. The second coil end 172 is located on the opposite side of the first coil end 171, separated from the stator core 17a. The second coil end 172 protrudes backward in a cylindrical shape from the stator core 17a in the direction of the drive shaft O1.

[0068] In the stator 17, the stator core 17a is embedded into the outer peripheral surface of the second diameter portion 64b. Thus, the stator core 17a is fixed to the second diameter portion 64b and subsequently to the protrusion 64. Furthermore, although not shown in the figure, multiple slits extending along the drive shaft center O1 are formed on the inner peripheral surface of the stator core 17a. Therefore, with the stator core 17a fixed to the second diameter portion 64b, gaps are formed between the slits and the outer peripheral surface of the second diameter portion 64b.

[0069] The rotor 11 is cylindrical around the drive shaft O1. Although detailed illustrations are omitted, the rotor 11 is composed of multiple permanent magnets corresponding to the stator 17 and laminated steel plates that fix each permanent magnet. Furthermore, the rotor 11 is formed with a diameter larger than that of the stator core 17a. Thus, the rotor 11 covers the stator core 17a from the outside within the vortex chamber 65. Moreover, multiple first bolt holes 11a are formed in the rotor 11. Each first bolt hole 11a penetrates the rotor 11 in the direction of the drive shaft O1.

[0070] The compression mechanism 9 has a driving scroll member 30 and a driven scroll member 40. The driving scroll member 30 is housed within the scroll chamber 65. The driving scroll member 30 is made of aluminum alloy. The driving scroll member 30 has a driving end plate 31, a driving scroll body 33, a driving peripheral wall 35, and a cover 37.

[0071] The drive end plate 31 extends in a generally disk-shaped manner orthogonal to the drive shaft O1 and the driven shaft O2. The driven shaft O2 is eccentric relative to the drive shaft O1 and extends parallel to the drive shaft O1. That is, the driven shaft O2 is also parallel to the front-rear direction. The drive end plate 31 has a first front surface 311 facing forward and a first rear surface 312 located on the opposite side of the first front surface 311 and facing rearward.

[0072] Additionally, a discharge port 32 is formed on the drive end plate 31. The discharge port 32 extends through the drive end plate 31 in the direction of the drive shaft O1. Furthermore, a discharge reed valve 57 and a retainer 58 are provided on the first front surface 311 of the drive end plate 31.

[0073] The discharge reed valve 57 and the retainer 58 are respectively fixed to the base end side of the first front surface 311 by fixing bolts 59. Thus, the discharge reed valve 57, by causing the tip side to... Figure 1 The opening position shown is the same as Figure 3 The outlet 32 ​​can be opened and closed by elastic deformation between the closed positions shown.

[0074] With the retainer 58 fixed to the first front surface 311 by the fixing bolt 59, its top end moves forward from the first front surface 311 in the direction of the drive shaft O1. More specifically, the retainer 58 gradually moves forward from the first front surface 311, i.e., from the drive scroll member 30 in the direction of the drive shaft O1, from the base end side toward the top end side. Thus, the retainer 58 can adjust the opening degree of the discharge reed valve 57 by abutting against the elastically deformable discharge reed valve 57.

[0075] like Figure 1 As shown, the driving scroll body 33 is integral with the driving end plate 31 and protrudes rearward from the first rear surface 312, that is, parallel to the driven scroll member 40 and the driving shaft O1 and the driven shaft O2. Although detailed illustrations are omitted, the driving scroll body 33 has the center of the scroll on the central side of the driving end plate 31 as the scroll center and protrudes outward in a scroll shape from the scroll center.

[0076] The drive peripheral wall 35 is formed as a cylinder extending parallel to both the drive shaft O1 and the driven shaft O2, with the drive shaft O1 as the center. The drive peripheral wall 35 surrounds the drive vortex body 33 from the outside and protrudes rearward in a cylindrical shape from the first rear surface 312. Furthermore, although not shown in the figure, the outer peripheral end of the vortex in the drive vortex body 33 is connected to the inner peripheral surface of the drive peripheral wall 35.

[0077] Furthermore, a first return path 35a extending to the drive end plate 31 is formed in the drive peripheral wall 35. The first return path 35a is an example of a "return path" in this invention. The first return path 35a passes through the drive end plate 31 and the drive peripheral wall 35 in the direction of the drive axis O1. Thus, the front end of the first return path 35a opens at the first front surface 311 of the drive end plate 31, and the rear end opens at the rear end surface of the drive peripheral wall 35.

[0078] The cover 37 has a wall portion 37a, an inner cylindrical portion 37b, a connecting portion 37c, an outer cylindrical portion 37d, and a second return path 37f. The second return path 37f is also an example of a "return path" in this invention.

[0079] The wall portion 37a extends in a generally plate-like manner in the radial direction of the cover 37. The wall portion 37a has a second front surface 371 facing forward and a second rear surface 372 located on the opposite side of the second front surface 371 and facing rearward.

[0080] A recess 373 and an intake port 374 are formed in the wall portion 37a. The recess 373 is located approximately in the center of the second front surface 371 and is recessed from the second front surface 371 toward the rear.

[0081] The intake port 374 is located radially outward of the recess 373 relative to the cover 37. The intake port 374 extends through the wall portion 37a in the front-rear direction, with its front end opening on the second front surface 371 and its rear end opening on the second rear surface 372. Furthermore, multiple intake ports 374 may be formed in the wall portion 37a.

[0082] Furthermore, in the wall portion 37a, a plurality of rings 22 are installed in the area between the recess 373 and the suction port 374. Although detailed illustrations are omitted, each ring 22 is arranged at equal intervals around the circumference of the recess 373, facing forward, and surrounds the recess 373 from the outside. In this embodiment, the number of rings 22 is set to six. Figure 1 The diagram shows one of the six rings 22. (The rest of the text is incomplete and likely refers to a separate topic.) Figure 4 The same applies to China.

[0083] like Figure 1 As shown, the inner cylindrical portion 37b is formed radially within the housing 37 at a location closer to the stator 17, and extends rearward in a cylindrical shape along the drive shaft center O1. The inner cylindrical portion 37b is formed with a diameter larger than the diameter of the first radial portion 64a of the protrusion 64, and smaller than the diameter of the second radial portion 64b. Furthermore, the inner diameter of the inner cylindrical portion 37b is formed to be approximately the same as the outer diameter of the first radial ball bearing 51. Alternatively, the outer diameter of the inner cylindrical portion 37b may be approximately the same as, or larger than, the outer diameter of the second radial portion 64b.

[0084] The connecting portion 37c is located between the wall portion 37a and the inner cylindrical portion 37b, and is integral with both the wall portion 37a and the inner cylindrical portion 37b. The connecting portion 37c expands in diameter from the inner cylindrical portion 37b toward the wall portion 37a in the direction of the drive shaft center O1, thereby connecting the wall portion 37a and the inner cylindrical portion 37b. Thus, the outer peripheral surface of the inner cylindrical portion 37b is continuous with the second rear surface 372 of the wall portion 37a via the connecting portion 37c.

[0085] Furthermore, an insertion hole 375 is formed inside the connecting portion 37c in the cover 37. The insertion hole 375 extends along the drive shaft O1 and communicates with the inner cylindrical portion 37b and the recess 373.

[0086] The outer cylindrical portion 37d is integral with the wall portion 37a. Thus, while connected to the wall portion 37a, the outer cylindrical portion 37d extends rearward in a cylindrical shape from the wall portion 37a in the direction of the drive shaft center O1. The outer diameter of the outer cylindrical portion 37d is formed to be approximately the same as the outer diameter of the drive peripheral wall 35 and the outer diameter of the rotor 11.

[0087] Furthermore, the inner diameter of the outer cylindrical portion 37d is larger than the diameters of the inner cylindrical portion 37b and the connecting portion 37c. Therefore, in the cover 37, the inner cylindrical portion 37b and the connecting portion 37c are arranged radially apart from the outer cylindrical portion 37d on the inner circumference of the outer cylindrical portion 37d. In this way, a receiving portion 38 is formed in the cover 37 by the wall portion 37a, the inner cylindrical portion 37b, the connecting portion 37c, and the outer cylindrical portion 37d. The receiving portion 38 is a bottomed annular shape with an opening at the rear.

[0088] Furthermore, the suction port 374 formed on the wall portion 37a is located radially outward from the inner cylindrical portion 37b and the connecting portion 37c, and inward from the outer cylindrical portion 37d. Thus, the suction port 374 communicates with the receiving portion 38.

[0089] Furthermore, a plurality of second bolt holes 376 extending to the wall portion 37a are formed in the outer cylindrical portion 37d. Each second bolt hole 376 penetrates the wall portion 37a and the outer cylindrical portion 37d in the direction of the drive shaft center O1. Moreover, although not shown in the figure, the number of second bolt holes 376 is equal to the number of first bolt holes 11a formed in the rotor 11. Figure 1 as well as Figure 4 The figure shows one of the plurality of first bolt holes 11a and one of the plurality of second bolt holes 376.

[0090] like Figure 1 As shown, one end of the second return path 37f opens at the second front surface 371 of the wall portion 37a. Furthermore, the second return path 37f extends radially within the wall portion 37a along the cover 37, and the other end communicates with the recess 373.

[0091] In the housing 37, the second front surface 371 of the wall portion 37a abuts against the rear end face of the drive peripheral wall 35. Furthermore, in the housing 37, the rotor 11 abuts against the rear end of the outer cylinder portion 37d. In this state, while inserting first bolts 34a into each of the first bolt holes 11a and each of the second bolt holes 376 from the rotor 11 side, the first bolts 34a are screwed into the drive peripheral wall 35. Thus, the housing 37 is fixed to the drive peripheral wall 35 and the rotor 11 while being clamped by them. As a result, the drive vortex member 30 and the rotor 11 become an integral unit.

[0092] In addition, by fixing the cover 37 to the drive peripheral wall 35 and the rotor 11 in this way, the first return path 35a is connected to the second return path 37f.

[0093] The driven scroll member 40 is also made of aluminum alloy. The driven scroll member 40 has a driven end plate 41 and a driven scroll body 43.

[0094] The driven end plate 41 extends in a generally disk-shaped manner orthogonal to the drive shaft O1 and the driven shaft O2. The driven end plate 41 has a third front surface 411 facing forward and a third rear surface 412 located on the opposite side of the third front surface 411 and facing rearward.

[0095] A receiving recess 15 is formed in the driven end plate 41. The receiving recess 15 is located in the center of the driven end plate 41. The receiving recess 15 is cylindrically recessed with the driven axis O2 centered on the third rear surface 412 of the driven end plate 41 facing forward. Thus, the receiving recess 15 faces the rear of the driven end plate 41 and further faces the first diameter portion 64a of the protrusion 64.

[0096] A driven shaft portion 16 is provided within the receiving recess 15. The driven shaft portion 16 has a bushing 53 and a driven pin 55. The bushing 53 is received within the receiving recess 15 via a sliding bearing 13. The driven pin 55 is inserted into the bushing 53. More specifically, the driven pin 55 is inserted into the bushing 53 at a position offset from the center of the bushing 53, i.e., from the driven shaft center O2. The driven pin 55 protrudes rearward from the bushing 53 and further from the driven end plate 41.

[0097] Additionally, a rotation-stopping pin 21 is fixed to the driven end plate 41 at the position opposite to the ring 22. The rotation-stopping pin 21 protrudes rearward from the third rear surface 412. Furthermore, six rotation-stopping pins 21 are fixed to the driven end plate 41 in the same number as the rings 22. Figure 1 as well as Figure 4 The figure shows one of the six rotation-stopping pins 21.

[0098] Furthermore, these rotation-stopping pins 21 and rings 22 constitute the driven mechanism 20. Here, the number of rotation-stopping pins 21 and rings 22 can be appropriately designed as long as there are 3 or more of them.

[0099] The driven scroll body 43 is integral with the driven end plate 41 and extends forward parallel to the drive shaft O1 and the driven shaft O2 from the third front surface 411 of the driven end plate 41. The driven scroll body 43 has the center of the scroll on the central side of the driven end plate 41 as the center of the scroll and extends outward in a scroll shape from the center of the scroll.

[0100] In this compressor, a driven scroll member 40 is housed within the drive scroll member 30, more specifically, in the portion of the drive scroll member 30 between the drive scroll body 33, the drive peripheral wall 35, and the housing 37. The drive scroll member 30 and the driven scroll member 40 engage the drive scroll body 33 and the driven scroll body 43. Thus, the drive scroll body 33 and the driven scroll body 43 face each other to form the compression chamber 12.

[0101] Furthermore, an intake portion 30a is formed between the driving peripheral wall 35 and the driven vortex member 40. That is, the driving vortex body 33 and the driven vortex body 43 are located within the intake portion 30a. The intake portion 30a is separated from the vortex chamber 65 by the driving peripheral wall 35 and the cover 37, and is also separated from the discharge chamber 14 (described later) by the driving end plate 31. Additionally, the intake portion 30a communicates with the intake port 374. Thus, the intake portion 30a communicates with the receiving portion 38 through the intake port 374.

[0102] Furthermore, by housing the driven scroll member 40 within the driving scroll member 30, the respective rotation stop pins 21 enter into each ring 22. In this way, the driving scroll member 30 and the driven scroll member 40 are assembled together in the front-rear direction, forming the scroll compression section 100. Moreover, strictly speaking, after the driving scroll body 33 and the driven scroll body 43 engage and their respective rotation stop pins 21 enter into each ring 22, the cover 37 in the driving scroll member 30 is fixed to the driving peripheral wall 35 and the rotor 11.

[0103] Furthermore, by assembling the drive scroll member 30 and the driven scroll member 40 together, the receiving recess 15 of the driven end plate 41 and the driven shaft portion 16 become the recess 373 facing the cover 37.

[0104] The housing 39 is made of aluminum alloy. The housing 39 is a bottomed cylindrical member having an outer peripheral wall 39a and a front wall 39b. The outer peripheral wall 39a is cylindrical with the drive shaft O1 as its center. Here, the outer diameter of the outer peripheral wall 39a is formed to be approximately the same as the outer diameter of the drive peripheral wall 35. Alternatively, the housing 39 can also be formed using resin or the like.

[0105] The front wall 39b is located at the front end of the housing 39. The front wall 39b extends in a generally disk-shaped manner radially from the driving shaft O1 and the driven shaft O2. The front wall 39b has a forward-facing fourth front surface 391 and a rearward-facing fourth rear surface 392 located on the opposite side of the fourth front surface 391. The front wall 39b is connected to the front end of the outer peripheral wall 39a.

[0106] Additionally, a protrusion 39d is formed on the front wall 39b. The protrusion 39d is an example of a "supported body" in this invention. The protrusion 39d is integrally formed at the center of the front wall 39b and protrudes forward from the fourth front surface 391 in the direction of the drive shaft O1. The outer diameter of the protrusion 39d is formed to be approximately the same as the inner diameter of the second radial ball bearing 52 and the inner diameter of the shaft seal member 63. Furthermore, a discharge passage 390 is formed on the protrusion 39d. The discharge passage 390 extends through the protrusion 39d in the direction of the drive shaft O1. Thus, the rear end of the discharge passage 390 opens at the fourth rear surface 392.

[0107] Furthermore, a third bolt hole 39e is formed in the outer peripheral wall 39a and the front wall 39b. The third bolt hole 39e penetrates the outer peripheral wall 39a and the front wall 39b in the direction of the drive shaft center O1. Moreover, although not shown in the figure, multiple third bolt holes 39e are formed in the outer peripheral wall 39a and the front wall 39b. Figure 1 , Figure 3 as well as Figure 4 The figure shows one of the multiple third bolt holes 39e.

[0108] like Figure 2 As shown, guide protrusions 71-76 are integrally formed on the front wall 39b. Guide protrusions 71-76 have the same shape and each protrudes rearward from a portion radially outward of the front wall 39b relative to the discharge passage 390 at the fourth rear surface 392 of the front wall 39b, extending radially toward the outer peripheral wall 39a. Furthermore, the guide protrusions 71-76 are connected to the outer peripheral wall 39a at their radially outward ends.

[0109] Furthermore, the guide protrusions 71-76 are arranged at equal intervals around each other in the circumferential direction of the front wall 39b. Moreover, each of the guide protrusions 71-76 has a curved portion 71a-76a. The curved portions 71a-76a are shaped such that they bend radially from the discharge passage 390 toward the outer peripheral wall 39a in the front wall 39b, and further toward the rearward side of the rotational direction R1 of the compression mechanism 9. Therefore, when the housing 39 is viewed from the rear, the guide protrusions 71-76 are shaped such that they bend radially from the discharge passage 390 toward the outer peripheral wall 39a in the rotational direction R1. In other words, the guide protrusions 71-76 are shaped such that while surrounding the discharge passage 390, they extend radially from the discharge passage 390 side toward the outer peripheral wall 39a side. Furthermore, the guide protrusions 71 to 76 each have guide surfaces 71b to 76b on the front side in the rotation direction R1. In addition, the number of guide protrusions 71 to 76 can be appropriately designed.

[0110] Additionally, the collision wall 77 is fixed to the guide protrusions 71-76 by multiple bolts 77a. For example... Figure 1 As shown, the collision wall 77 is made of metal and is formed into a disk shape with a diameter larger than that of the discharge passage 390. Furthermore, the collision wall 77 overlaps with the discharge passage 390 in the direction of the drive shaft O1 by being fixed to the guide protrusions 71-76. Alternatively, the collision wall 77 may be made of resin.

[0111] like Figure 1 as well as Figure 3 As shown, the housing 39 abuts against the rear surface of its outer peripheral wall 39a against the first front surface 311 of the drive end plate 31. Furthermore, in this state, the second bolts 34b are inserted into each of the third bolt holes 39e, and simultaneously screwed onto the drive end plate 31. In this way, the housing 39 is fixed to the drive end plate 31, and further fixed to the drive scroll member 30.

[0112] Thus, the housing 39 is fixed to the drive end plate 31, thereby forming a discharge chamber 14 on the inner side of the outer peripheral wall 39a and between the front wall 39b of the housing 39 and the drive end plate 31. The discharge chamber 14 communicates with the discharge outlet 32 ​​and the discharge passage 390. Furthermore, the discharge chamber 14 communicates with the first return path 35a. Therefore, the discharge chamber 14 communicates with the recess 373 of the cover 37 via the first return path 35a and the second return path 37f.

[0113] Furthermore, the aforementioned guide protrusions 71-76 and collision wall 77 are disposed within the discharge chamber 14. Moreover, within the discharge chamber 14, the guide protrusions 71-76 and collision wall 77 move forward from the drive end plate 31 and face opposite to the drive end plate 31. Furthermore, in this compressor, as... Figure 3 As shown, when an imaginary extension line L is defined extending from the top of the retainer 58 along the shape of the retainer 58, the guide protrusion 74 is located on the extension line L.

[0114] The drive scroll member 30 is positioned forward of the stator 17 within the scroll chamber 65. Furthermore, in the drive scroll member 30, the inner cylindrical portion 37b of the cover 37 is inserted into the inner circumference of the first coil end 171. In this state, the first radial ball bearing 51 is inserted into the inner cylindrical portion 37b. Thus, the cover 37 is rotatably supported on the first radial portion 64a via the first radial ball bearing 51. The receiving portion 38 communicates with the scroll chamber 65. Additionally, the front portion of the first radial portion 64a enters the insertion hole 375.

[0115] Furthermore, the inner cylindrical portion 37b faces the second diameter portion 64b in the direction of the drive shaft O1. Here, since the outer diameter of the inner cylindrical portion 37b is smaller than the outer diameter of the second diameter portion 64b, the inner cylindrical portion 37b and the first coil end 171 are radially spaced apart in the cover 37 when the cover 37 is supported on the first diameter portion 64a.

[0116] Furthermore, by supporting the cover 37 on the first radial portion 64a in this way, the wall portion 37a of the cover 37 faces the first coil end 171 from the front. Moreover, the outer cylindrical portion 37d of the cover 37 is located outside the first coil end 171 in the radial direction of the cover 37. At this time, the outer cylindrical portion 37d and the first coil end 171 are spaced apart in the radial direction of the cover 37.

[0117] In other words, the first coil end 171 is housed within the receiving portion 38 by being supported by the cover 37 on the first radial portion 64a. Thus, within the receiving portion 38, the first coil end 171 is covered from the front by the wall portion 37a and the connecting portion 37c, and from the radially inward side by the inner cylindrical portion 37b. Furthermore, within the receiving portion 38, the first coil end 171 is covered from the radially outward side by the outer cylindrical portion 37d.

[0118] Furthermore, in this compressor, with the housing 37 supported by the first radial portion 64a, the first radial portion 64a, the first radial ball bearing 51, the inner cylinder portion 37b, the first coil end portion 171, and the outer cylinder portion 37d are arranged sequentially from the drive shaft center O1 side outward in the radial direction of the housing 37. Moreover, these components—the first radial portion 64a, the first radial ball bearing 51, the inner cylinder portion 37b, the first coil end portion 171, and the outer cylinder portion 37d—are arranged in a radially overlapping manner.

[0119] Furthermore, in this compressor, the protrusion 39d of the housing 39 is inserted into the second radial ball bearing 52 and the shaft seal member 63. Thus, the housing 39 is rotatably supported on the support portion 66 via the second radial ball bearing 52. In this way, the drive scroll member 30, while disposed within the scroll chamber 65, is supported on the outer casing 6 in a manner rotatable about the drive axis O1 by both the protrusion 64 and the support portion 66.

[0120] Furthermore, the discharge passage 390 is supported by the support portion 66 via the housing 39, thus positioning it so that it faces the discharge port 69 from the rear. Consequently, the discharge chamber 14 and the discharge port 69 are connected via the discharge passage 390. Moreover, the discharge passage 390 and the discharge port 69 are sealed to the vortex chamber 65 by the shaft seal member 63.

[0121] On the other hand, in the driven scroll member 40, the driven pin 55 of the driven shaft portion 16 is inserted into the pin hole 4. Thus, while the driven scroll member 40 is disposed within the scroll chamber 65, its first diameter portion 64a relative to the protrusion 64 is supported in a manner that allows it to rotate about the driven axis O2. In other words, unlike the driving scroll member 30, the driven scroll member 40 is supported on the housing 6 solely by the protrusion 64 in a manner that allows it to rotate about the driven axis O2.

[0122] In a compressor configured as described above, such as Figure 1 As shown by the dashed arrow, the low-temperature, low-pressure refrigerant after passing through the evaporator is drawn into the scroll chamber 65 through the suction port 68. Furthermore, if the electric motor 10 operates and the rotor 11 rotates, the rotation of the rotor 11 is transmitted to the drive scroll member 30. Therefore, within the scroll chamber 65, the drive scroll member 30 rotates around the drive shaft O1. In other words, the drive scroll member 30 rotates integrally with the rotor 11. At this time, in the driven mechanism 20, each rotation stop pin 21 slides in contact with the inner circumferential surface of each ring 22 while causing each ring 22 to rotate relative to the center of its respective rotation stop pin 21. In this way, the driven mechanism 20 transmits the torque of the drive scroll member 30 to the driven scroll member 40.

[0123] As a result, the driven scroll member 40 rotates around the driven axis O2 by driving the scroll member 30 and the driven mechanism 20. At this time, the driven mechanism 20 restricts the rotation of the driven scroll member 40. Thus, the driven scroll member 40 revolves relative to the driving scroll member 30 around the driven axis O2. Furthermore, by driving the scroll body 33 and the driven scroll body 43 to rotate within the intake section 30a, the volume of the compression chamber 12 is changed.

[0124] Here, the refrigerant drawn into the scroll chamber 65 from the intake port 68 contains lubricating oil 18. Furthermore, the refrigerant in the scroll chamber 65 flows between the rotor 11 and the stator 17 and reaches the receiving section 38. Additionally, the refrigerant drawn into the scroll chamber 65 also flows into the receiving section 38 through the gaps formed in the stator core 17a. Thus, the refrigerant in the receiving section 38 is drawn into the compression chamber 12 from the intake port 374 via the intake section 30a. Consequently, the lubricating oil 18 is also drawn into the compression chamber 12 along with the refrigerant from the intake port 374 via the intake section 30a.

[0125] Furthermore, the compression chamber 12 compresses the refrigerant by reducing its volume while simultaneously enclosing the refrigerant and lubricating oil 18 within itself, through the driven rotation of the driven scroll member 30 and the driven rotation of the driven scroll member 40. As a result, the discharge port 32 is opened by the elastic deformation of the discharge reed valve 57, allowing the compressed refrigerant, now at a high discharge pressure, to be discharged from the discharge port 32 into the discharge chamber 14. This compressed refrigerant contains the lubricating oil 18.

[0126] Here, the retainer 58 extends forward from the first front surface 311 in the direction of the drive shaft O1, gradually moving from the base end side toward the top end side. Therefore, the compressed refrigerant is easily guided radially outward from the discharge port 32 toward the housing 39 by following the shape of the retainer 58 as it is discharged from the discharge port 32 toward the discharge chamber 14.

[0127] In addition, in this compressor, the casing 39 drives the scroll member 30 to rotate, and the centrifugal force of the rotating casing 39 acts on the compressed refrigerant in the discharge chamber 14.

[0128] Furthermore, in this compressor, within the discharge chamber 14, guide protrusions 71-76 face the drive end plate 31. Therefore, the compressed refrigerant discharged into the discharge chamber 14 collides with the guide protrusions 71-76. Here, the guide protrusions 71-76 within the discharge chamber 14 rotate integrally with the housing 39 around the drive shaft O1. Thus, the guide protrusions 71-76 collide with the compressed refrigerant while rotating around the drive shaft O1. More specifically, through the collision of the compressed refrigerant with the guide surfaces 71b-76b, the compressed refrigerant is guided radially outward along the guide surfaces 71b-76b.

[0129] In particular, in this compressor, guide protrusion 74 of guide protrusions 71-76 is located on the extension line L extending from the top of retainer 58, making it prone to colliding with the compressed refrigerant discharged from outlet 32 ​​and guided by retainer 58. As a result, after colliding with the compressed refrigerant, guide protrusions 71-76 guide the compressed refrigerant radially outward from the front wall 39b of discharge passage 390, i.e., towards the outer periphery of discharge chamber 14. At this time, depending on the overall shape of guide protrusions 71-76, including curved portions 71a-76a, guides the compressed refrigerant radially outward from discharge passage 390 towards the front wall 39b, guiding it towards the rearward side in the rotational direction R1.

[0130] Furthermore, during the process of colliding with the compressed refrigerant and guiding it radially outward toward the front wall 39b, the guide protrusions 71-76 separate the lubricating oil 18 contained in the compressed refrigerant from the compressed refrigerant. Therefore, the guide protrusions 71-76 also guide the lubricating oil 18 separated from the compressed refrigerant radially outward toward the front wall 39b, beyond the discharge passage 390.

[0131] Furthermore, as described above, in this compressor, the centrifugal force of the rotating housing 39 acts on the compressed refrigerant in the discharge chamber 14. Therefore, in this compressor, in addition to the collision with the guide protrusions 71-76, the centrifugal force of the housing 39 acting on the compressed refrigerant can also be used to separate the lubricating oil 18 from the compressed refrigerant.

[0132] Additionally, in this compressor, the refrigerant in the discharge chamber 14 may also collide with the impact wall 77. As a result, the impact wall 77 causes the lubricating oil 18 contained in the refrigerant to separate from the refrigerant. Consequently, the lubricating oil 18 separated from the refrigerant by the collision with the guide protrusions 71-76 also flows radially outward from the front wall 39b of the discharge passage 390.

[0133] In this way, in this compressor, the refrigerant after the lubricating oil 18 has been separated flows between the guide protrusions 71-76 and the front of the impact wall 77, and is discharged from the discharge chamber 14 to the outside of the housing 6 via the discharge passage 390 and the discharge connection port 69. On the other hand, the lubricating oil 18 separated from the refrigerant may adhere to the inner circumferential surface of the outer peripheral wall 39a, and is easily retained in the discharge chamber 14 due to the centrifugal force acting on the housing 39 of the refrigerant. As a result, in this compressor, the discharge of lubricating oil 18 to the outside of the housing 6 via the discharge passage 390 and the discharge connection port 69 can be suppressed.

[0134] Furthermore, the first return path 35a is connected to the discharge chamber 14, so the lubricating oil 18 in the discharge chamber 14 flows through the first return path 35a and the second return path 37f and reaches the recess 373. Here, the recess 373 becomes a suction pressure atmosphere due to the refrigerant sucked in from the suction port 374, so the pressure is lower than the pressure in the discharge chamber 14. In this way, the lubricating oil 18 reaching the recess 373 not only lubricates the second front surface 371 of the wall portion 37a and the third rear surface 412 of the driven end plate 41, but also lubricates the driven shaft portion 16 and the first radial ball bearing 51. In addition, the lubricating oil 18 after these lubrications flows between the first radial ball bearing 51 and the inner cylinder portion 37b and flows out into the vortex chamber 65. Furthermore, the lubricating oil 18 in the vortex chamber 65 is sucked back into the suction portion 30a and then into the compression chamber 12 from the suction port 374 along with the refrigerant. Therefore, in this compressor, the driving scroll 30 and the driven scroll 40 can be properly lubricated by the lubricating oil 18, thus preventing them from wearing out properly.

[0135] Therefore, the compressor of Example 1 exhibits excellent durability.

[0136] In particular, in this compressor, guide protrusions 71-76 are formed on the front wall 39b of the housing 39, thereby functioning as beam members that reinforce the front wall 39b. Therefore, in this compressor, the rigidity of the front wall 39b, and consequently the housing 39, can be adequately ensured.

[0137] Furthermore, in this compressor, a collision wall 77 is fixed to the guide protrusions 71-76, and the collision wall 77 overlaps with the discharge passage 390 in the direction of the drive shaft O1. Therefore, in this compressor, it is possible to properly prevent the compressed refrigerant in the discharge chamber 14 from reaching the discharge passage 390 without colliding with the guide protrusions 71-76.

[0138] Furthermore, in this compressor, the second diameter portion 64b of the protrusion 64 is formed to have a larger diameter than the first diameter portion 64a. Therefore, the rigidity of the protrusion 64 is adequately ensured by the second diameter portion 64b in this compressor. Thus, the stator 17 can be adequately supported by the second diameter portion 64b in this compressor. Additionally, since the diameter of the first diameter portion 64a is smaller than the diameter of the second diameter portion 64b, the over-diametering of the first radial ball bearing 51 and the inner cylinder portion 37b can be prevented in this compressor.

[0139] Example 2

[0140] like Figure 4 as well as Figure 5As shown, in the compressor of Embodiment 2, a cylindrical protrusion 78 is formed on the front wall 39b of the housing 39. Furthermore, in this compressor, the guide protrusions 71-76 are not fixed with collision walls 77.

[0141] like Figure 4 As shown, the cylindrical protrusion 78 is integrally formed on the front wall 39b and protrudes cylindrically from the fourth rear surface 392 toward the discharge chamber 14, centered on the drive shaft O1. Furthermore, in this compressor, the discharge passage 390 extends from within the protrusion 39d into the cylindrical protrusion 78. In other words, the cylindrical protrusion 78 surrounds the discharge passage 390 from the outside within the discharge chamber 14.

[0142] In addition, such as Figure 5 As shown, the cylindrical protrusion 78 is integral with the guide protrusions 71-76. Therefore, a barrier portion 701 is formed between the guide protrusions 71 and 72 and the outer peripheral surfaces of the cylindrical protrusion 78. Similarly, a barrier portion 702 is formed between the guide protrusions 72 and 73 and the outer peripheral surfaces of the cylindrical protrusion 78, and a barrier portion 703 is formed between the guide protrusions 73 and 74 and the outer peripheral surfaces of the cylindrical protrusion 78. Furthermore, a barrier portion 704 is formed between the guide protrusions 74 and 75 and the outer peripheral surfaces of the cylindrical protrusion 78, and a barrier portion 705 is formed between the guide protrusions 75 and 76 and the outer peripheral surfaces of the cylindrical protrusion 78. Finally, a barrier portion 706 is formed between the guide protrusions 76 and 71 and the outer peripheral surfaces of the cylindrical protrusion 78. The other components of this compressor are the same as those of the compressor in Example 1. The same reference numerals are used to refer to the same components and detailed descriptions related to the components are omitted.

[0143] Similar to the compressor in Embodiment 1, in this compressor, the compressed refrigerant in the discharge chamber 14 also collides with the guide protrusions 71-76, thereby guiding the compressed refrigerant and the lubricating oil 18 toward the outer periphery of the discharge chamber 14 while the guide protrusions 71-76 separate the lubricating oil 18 from the compressed refrigerant.

[0144] Here, in this compressor, the cylindrical protrusion 78 protrudes into the discharge chamber 14. Therefore, in this compressor, the lubricating oil 18 guided by the guide protrusions 71-76 toward the outer periphery of the discharge chamber 14 needs to pass over the cylindrical protrusion 78 to reach the discharge passage 390 in order to flow out of the discharge passage 390 to the outside of the discharge chamber 14. Therefore, in this compressor, most of the lubricating oil 18 going from the outer periphery of the discharge chamber 14 to the discharge passage 390 is blocked by the barrier portions 701-704. As a result, in this compressor, the discharge of lubricating oil 18 to the outside of the housing 6 via the discharge passage 390 and the discharge connection port 69 can also be suppressed. Furthermore, the lubricating oil 18 whose flow to the discharge passage 390 is blocked by the barrier portions 701-704 flows toward the outer periphery of the discharge chamber 14 by the centrifugal force of the housing 39.

[0145] Furthermore, in this compressor, in addition to the guide protrusions 71-76, a cylindrical protrusion 78 is also formed on the front wall 39b of the housing 39. Therefore, the rigidity of the front wall 39b can be more appropriately ensured by the guide protrusions 71-76 and the cylindrical protrusion 78. Other functions in this compressor are the same as those in the compressor of Embodiment 1.

[0146] The present invention has been described above based on embodiments 1 and 2, but the present invention is not limited to the above embodiments 1 and 2, and can of course be applied with appropriate modifications without departing from its spirit.

[0147] For example, in the compressor of Embodiment 1, the guide protrusions 71-76 are integrally formed on the front wall 39b of the housing 39. However, it is not limited to this, and it may also be configured such that the guide protrusions 71-76 are formed with a component separate from the front wall 39b and fixed to the front wall 39b. The same applies to the guide protrusions 71-76 and the cylindrical protrusion 78 in the compressor of Embodiment 2.

[0148] Furthermore, in the compressor of Embodiment 1, the guide protrusions 71-76 have curved portions 71a-76a. However, this is not a limitation; the curved portions 71a-76a may be omitted, and the guide protrusions 71-76 may be designed to extend linearly in the radial direction of the front wall 39b. Additionally, the shape of the guide protrusions 71-76 can be appropriately designed as long as it allows the refrigerant and lubricating oil 18 to be guided radially outward from the housing 39 by the rotation of the housing 39. The same applies to the compressor of Embodiment 2.

[0149] In addition, in the compressor of Embodiment 1, the housing 39 is fixed to the drive end plate 31 of the drive scroll member 30, but it is not limited thereto; the housing 39 may also be fixed to the driven end plate 41 of the driven scroll member 40. In this case, the discharge port 32 is formed on the driven end plate 41. Furthermore, the discharge reed valve 57 and the retainer 58 are fixed to the driven end plate 41 by fixing bolts 59.

[0150] Furthermore, in the compressor of Embodiment 1, the stator core 17a of the stator 17 is fixed to the protrusion 64, and the rotor 11 is arranged on the outside of the stator core 17a. However, it is not limited to this, and it can also be configured such that the stator core 17a is fixed to the inner circumferential surface of the outer casing 60, and the rotor 11 is arranged inside the stator core 17a and fixed to the inner cylindrical portion 37b of the cover 37. The same applies to the compressor of Embodiment 2.

[0151] Furthermore, in the compressor of Embodiment 1, the protrusion 64 has a first diameter portion 64a and a second diameter portion 64b, but is not limited thereto; the protrusion 64 may also be formed only by the first diameter portion 64a, or the protrusion 64 may be formed only by the second diameter portion 64b. The same applies to the compressor of Embodiment 2.

[0152] Furthermore, in the compressor of Embodiment 1, the protrusion 64 is integrally provided to the first outer casing 61. However, it is not limited to this, and it can also be configured such that the first outer casing 61 and the protrusion 64 are formed separately, and the protrusion 64 is fixed to the first outer casing 61. In this case, it is also easy to form the first outer casing 61 and the protrusion 64 with different materials. The same applies to the compressor of Embodiment 2.

[0153] In addition, the following inventions are included in this specification.

[0154] (Note 1)

[0155] A dual-rotary scroll compressor includes a housing, a compression mechanism, a drive mechanism, and a driven mechanism.

[0156] The compression mechanism, the drive mechanism, and the driven mechanism are housed within the housing.

[0157] The compression mechanism includes: a driving scroll member that is driven to rotate about a driving axis via the driving mechanism; and a driven scroll member that is eccentric relative to the driving scroll member and is driven to rotate about a driven axis via the driving scroll member and the driven mechanism.

[0158] The driving scroll member and the driven scroll member form a compression chamber that compresses the refrigerant through the driving rotation and the driven rotation.

[0159] Its features are,

[0160] A discharge port is formed in the outer casing, through which the compressed refrigerant, i.e., the compressed refrigerant, is discharged to the outside after being compressed in the compression chamber.

[0161] A housing capable of rotating together with the drive mechanism is provided inside the outer casing.

[0162] A discharge chamber is formed within the housing, and the discharge chamber communicates with the compression chamber, through which the compressed refrigerant is discharged.

[0163] The housing has a wall extending radially along the housing.

[0164] The wall portion is provided with a discharge passage and a guide protrusion.

[0165] The discharge passage connects the discharge chamber to the discharge port.

[0166] The guide protrusion protrudes into the discharge chamber and, by colliding with the compressed refrigerant, separates the lubricating oil contained in the compressed refrigerant from the compressed refrigerant, and guides the compressed refrigerant and the lubricating oil toward a radially outer direction than the discharge passage.

[0167] (Note 2)

[0168] According to Appendix 1, the dual rotary scroll compressor

[0169] The guide protrusions are multiple.

[0170] The guide protrusions are arranged circumferentially on the wall portion.

[0171] (Note 3)

[0172] According to Appendix 1 or 2, the dual rotary scroll compressor

[0173] The guide protrusion is provided with a curved portion, which bends toward the rearward side of the housing in the direction of rotation as it approaches the radially outer side.

[0174] (Note 4)

[0175] The dual rotary scroll compressor according to any one of Appendices 1 to 3,

[0176] A support body is formed in the wall portion, the support body protruding toward the housing and being rotatably supported by the housing via a bearing.

[0177] The discharge passage extends within the supported body.

[0178] (Note 5)

[0179] The dual rotary scroll compressor according to any one of Appendices 1 to 4,

[0180] A collision wall is provided in the discharge chamber, which overlaps with the discharge passage in the direction of the drive shaft and collides with the compressed refrigerant.

[0181] (Note 6)

[0182] The dual rotary scroll compressor according to any one of Appendices 1 to 5,

[0183] A cylindrical protrusion is provided on the wall, which is connected to the guide protrusion and protrudes into the discharge chamber in a cylindrical shape, and forms the discharge passage inside.

[0184] (Note 7)

[0185] The dual rotary scroll compressor according to any one of Appendices 1 to 6,

[0186] The compression mechanism has:

[0187] The outlet allows the compressed refrigerant to be discharged from the compression chamber to the discharge chamber.

[0188] A reed valve is provided to open and close the discharge port; and

[0189] The retainer is capable of adjusting the opening degree of the discharge reed valve.

[0190] The base end of the retainer is fixed to the compression mechanism, and the retainer extends away from the compression mechanism from the base end toward the top end.

[0191] The guide protrusion is located on the extension line of the top of the retainer.

[0192] (Note 8)

[0193] The dual rotary scroll compressor according to any one of Appendices 1 to 7,

[0194] The discharge chamber is connected to the return path, which allows the lubricating oil in the discharge chamber to flow back to a part of the housing where the pressure is lower than that in the discharge chamber.

[0195] Industrial availability

[0196] This invention can be used in vehicle air conditioning systems, etc.

[0197] Explanation of reference numerals in the attached figures

[0198] 6. Outer shell

[0199] 9. Compression mechanism

[0200] 10. Electric motor (drive mechanism)

[0201] 12 Compression Chamber

[0202] 14 Exhaust Chamber

[0203] 18 Lubricating oil

[0204] 20 Driven Mechanism

[0205] 30 Driven scroll component

[0206] 32 discharge outlets

[0207] 35a First return path (return path)

[0208] 37f Second return path (return path)

[0209] 39. Shell

[0210] 39b Anterior wall (wall portion)

[0211] 39d Protrusion (supported part)

[0212] 40 Driven scroll component

[0213] 52. Second radial ball bearing (bearing)

[0214] 57 Discharge reed valve

[0215] 58 Retainer

[0216] 69. Exit the communication port.

[0217] 71~76 Guide convex part

[0218] 71a~76a Bending sections

[0219] 77 Collision Wall

[0220] 78 cylindrical convex part

[0221] 390 Excretion Pathway

[0222] L extension line

[0223] O1 drive shaft

[0224] O2 driven shaft

[0225] R1 Rotation direction

Claims

1. A dual-rotary scroll compressor, comprising a housing, a compression mechanism, a drive mechanism, and a driven mechanism. The compression mechanism, the drive mechanism, and the driven mechanism are housed within the housing. The compression mechanism includes: a driving scroll member that is driven to rotate about a driving axis via the driving mechanism; and a driven scroll member that is eccentric relative to the driving scroll member and is driven to rotate about a driven axis via the driving scroll member and the driven mechanism. The driving scroll member and the driven scroll member form a compression chamber that compresses the refrigerant through the driving rotation and the driven rotation. Its features are, A discharge port is formed in the outer casing, through which the compressed refrigerant, i.e., the compressed refrigerant, is discharged to the outside after being compressed in the compression chamber. A housing capable of rotating together with the drive mechanism is provided inside the outer casing. A discharge chamber is formed within the housing, and the discharge chamber communicates with the compression chamber, through which the compressed refrigerant is discharged. The housing has a wall extending radially along the housing. The wall portion is provided with a discharge passage and a guide protrusion. The discharge passage connects the discharge chamber to the discharge port. The guide protrusion protrudes into the discharge chamber and, by colliding with the compressed refrigerant, separates the lubricating oil contained in the compressed refrigerant from the compressed refrigerant, and guides the compressed refrigerant and the lubricating oil toward a radially outer direction than the discharge passage.

2. The dual rotary scroll compressor according to claim 1, The guide protrusions are multiple. The guide protrusions are arranged circumferentially on the wall portion.

3. The dual rotary scroll compressor according to claim 1 or 2, The guide protrusion is provided with a curved portion, which bends toward the rearward side of the housing in the direction of rotation as it approaches the radially outer side.

4. The dual rotary scroll compressor according to claim 1 or 2, A support body is formed in the wall portion, the support body protruding toward the housing and being rotatably supported by the housing via a bearing. The discharge passage extends within the supported body.

5. The dual rotary scroll compressor according to claim 1 or 2, A collision wall is provided in the discharge chamber, which overlaps with the discharge passage in the direction of the drive shaft and collides with the compressed refrigerant.

6. The dual rotary scroll compressor according to claim 1 or 2, A cylindrical protrusion is provided on the wall, which is connected to the guide protrusion and protrudes into the discharge chamber in a cylindrical shape, and forms the discharge passage inside.

7. The dual rotary scroll compressor according to claim 1 or 2, The compression mechanism has: The outlet allows the compressed refrigerant to be discharged from the compression chamber to the discharge chamber. A reed valve is provided to open and close the discharge port; and The retainer is capable of adjusting the opening degree of the discharge reed valve. The base end of the retainer is fixed to the compression mechanism, and the retainer extends away from the compression mechanism from the base end toward the top end. The guide protrusion is located on the extension line of the top of the retainer.

8. The dual rotary scroll compressor according to claim 1 or 2, The discharge chamber is connected to the return path, which allows the lubricating oil in the discharge chamber to flow back to a part of the housing where the pressure is lower than that in the discharge chamber.

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